liu.seSök publikationer i DiVA
Ändra sökning
Avgränsa sökresultatet
123 51 - 100 av 121
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Träffar per sida
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
Markera
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 51.
    Forsberg, Anna
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Abrahamsson, Thomas
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Björksten, Bengt
    Karolinska Institute, Sweden.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Pre- and post-natal Lactobacillus reuteri supplementation decreases allergen responsiveness in infancy2013Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 43, nr 4, s. 434-442Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background

    We have previously shown that Lactobacillus reuteri supplementation from pregnancy week 36 and to the infant through the first year of life decreased the prevalence of IgE-associated eczema at 2 years. The underlying immunological mechanisms are unknown, however.

    Objective

    To investigate the immunomodulatory effect of probiotic supplementation on allergen- and mitogen-induced immune responses in children until 2 years of age.

    Methods

    Blood mononuclear cells were collected at birth, 6, 12 and 24 months from 61 children (29 probiotic and 32 placebo treated) and cultured with ovalbumin, birch and cat extract and Phytohaemagglutinin (PHA). Cytokine and chemokine secretion was determined using an in-house multiplexed Luminex assay and ELISA. Real-time PCR was performed to investigate the Ebi3, Foxp3, GATA-3 and T-bet mRNA expression.

    Results

    Probiotic treatment was associated with low cat-induced Th2-like responses at 6 months (IL-5, P = 0.01, and IL-13, P = 0.009), with a similar trend for IL-5 at 12 months (P = 0.09). Cat-induced IFN-γ responses were also lower after probiotic than after placebo treatment at 24 months (P = 0.007), with similar findings for the anti-inflammatory IL-10 at birth (P = 0.001) and at 12 months (P = 0.009). At 24 months, Th2-associated CCL22 levels were lower in the probiotic than in the placebo group after birch stimulation (P = 0.02), with a similar trend after ovalbumin stimulation (P = 0.07). Lower CCL22 levels were recorded at 12 and 24 months (P = 0.03 and P = 0.01) after PHA stimulation.

    Conclusion and Clinical Relevance

    Lactobacillus reuteri supplementation decreases allergen responsiveness and may enhance immunoregulatory capacity during infancy. L. reuteri supplementation from week 36 and during the first year of life significantly decreases IgE-associated eczema and lowers allergen and mitogen responsiveness.

  • 52.
    Forsberg, Anna
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Abrahamsson, Thomas
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för kliniska vetenskaper. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Björkstén, Bengt
    Karolinska Institute, Stockholm, Sweden; Örebro University, Sweden .
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Pre- and postnatal administration of Lactobacillus reuteri decreases TLR2 responses in infants.2014Ingår i: Clinical and translational allergy, ISSN 2045-7022, Vol. 4, s. 1-7Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Mice models indicate that intact Toll like receptor (TLR) signaling may be essential for the allergy protective effects of diverse bacterial exposure observed in clinical trials and epidemiological studies. Probiotic supplementation with Lactobacillus reuteri from pregnancy week 36 and to the infant through the first year of life decreased the prevalence of IgE-associated eczema at two years (ClinicalTrials.gov NCT01285830). The effect of this supplementation on innate immune responses to bacterial products and the expression of associated TLRs were explored.

    METHODS: Blood mononuclear cells were collected at birth, 6, 12 and 24 months from 61 infants and cultured with TLR2, 4 and 9 ligands. Cytokine and chemokine secretion was determined as well as TLR2, 4 and 9 mRNA expression.

    RESULTS: Probiotic supplementation was associated with decreased LTA (lipoteichoic acid) induced CCL4, CXCL8, IL-1β and IL-6 responses at 12 months and decreased CCL4 and IL-1β secretion at 24 months. TLR2 mRNA expression was not affected by probiotic treatment.

    CONCLUSIONS: Decreased responses to TLR2, the main receptor for LTA from Gram positive bacteria, in probiotic treated children seem to be dependent on factors downstream of TLR mRNA expression.

  • 53.
    Forsberg, Anna
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Bengtsson, Mathias
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Eringfält, Anna
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    Mjösberg, Jenny
    Department of Medicine, Center for Infectious Medicine, Karolinska University Hospital Huddinge, Karolinska Institutet, Stockholm, Sweden.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Letter: GATA binding protein 3(+) group 2 innate lymphoid cells are present in cord blood and in higher proportions in male than in female neonates.2014Ingår i: Journal of Allergy and Clinical Immunology, ISSN 0091-6749, E-ISSN 1097-6825, Vol. 134, nr 1, s. 228-230Artikel i tidskrift (Refereegranskat)
  • 54.
    Forsberg, Anna
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Straka, Elisabeth
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Johansson, E.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Mehta, Ratnesh
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Jenmalm, Maria C
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Mjösberg, Jenny
    Tytgat Institute for Intestinal and Liver Research, Academic, Medical Center, Amsterdam, Netherlands.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    Plasticity and flexibility of T cells in human pregnancy in JOURNAL OF REPRODUCTIVE IMMUNOLOGY, vol 90, issue 2, pp 149-1492011Ingår i: JOURNAL OF REPRODUCTIVE IMMUNOLOGY, Elsevier , 2011, Vol. 90, nr 2, s. 149-149Konferensbidrag (Refereegranskat)
    Abstract [en]

    Introduction:Pregnancy challenges the immune system. Thus, tolerance to the semi-allogenic fetus must be supported while the mother and fetus still must be protected against infectious agents. Pregnancy is associated with a Th2 deviated immune system, away from a harmful Th1 associated immunity, although this may be a simplified view. Regulatory T cells (Tregs) are enriched in the uterus, but occur at normal frequency in the circulation. It has become increasingly evident that Tregs and T helper cells are not stably committed lineages but are plastic, showing close relationships between subsets. We hypothesize that an increased T cell flexibility in pregnancy can help to explain the paradox of simultaneous tolerance and strong antimicrobial responses. Our aim was to investigate whether the plasticity concept is applicable for the Treg subset, and if it involves the entire T helper population.

    Material and methods: Isolated Tregs (CD4dimCD25high) and control cells (CD4+CD25−) from second trimester pregnant (n = 14) and non-pregnant women (n = 14) were stimulated for 24 h with plate-bound anti-CD3/anti-CD28. Signature gene and protein expression of each T cell subset was measured using transcription factor expression by real time-PCR and multiplex bead array of cell culture supernatants, respectively. The whole PBMC fraction is also used in ongoing experiments and either stimulated with plate-bound anti-CD3/anti-CD28 or with the Th1, Th2 and Th17 deviating microbial agents PPD (Th1), TT (Th2) and C. albicans hyphae (Th17). After culturing, the cells are stained for intracellular transcription factors associated with Th1, Th2, Th17 and Treg immunity.

    Results: Stimulated Tregs from pregnant compared to non-pregnant women showed significantly higher levels of markers for Treg cells (Foxp3 mRNA), Th2 cells (GATA-3 mRNA and IL4 protein) and a tendency to increase in markers of Th17 (RORC mRNA and IL-17 protein), whereas Th1 markers (Tbet mRNA and IFN-γ) showed no difference between pregnant and non-pregnant women. Further, ongoing studies may reveal if the entire T helper population shows a higher degree of responsiveness during pregnancy.

    Conclusions: Our results imply an increased plasticity of the Treg population during pregnancy, suggesting that Treg cells are able to switch to a Th2/Th17-like phenotype, depending on current demands of tolerance or infectious threats.

  • 55.
    Furuhjelm, Catrin
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Fälth-Magnusson, Karin
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Duchén, Karel
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Th1 and Th2 chemokines, vaccine induced 1 immunity and allergic disease in infants  after maternal ω-3 fatty acid supplementation during pregnancy and lactation2011Ingår i: Pediatric Research, ISSN 0031-3998, E-ISSN 1530-0447, Vol. 69, nr 3, s. 259-264Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We investigated whether the previously reported preventive effect of maternal ω-3 fatty acid supplementation on IgE-associated allergic disease in infancy may be mediated by facilitating a balanced circulating Th2/Th1 chemokine profile in the infant. Vaccine-induced immune responses at 2 y of age were also evaluated. Pregnant women, at risk of having an allergic infant, were randomized to daily supplementation with 1.6 g eicosapentaenoic acid and 1.1 g docosahexaenoic acid or placebo from the 25th gestational week through 3.5 mo of breastfeeding. Infant plasma was analyzed for chemokines (cord blood, 3, 12, 24 mo) and anti-tetanus and anti-diphtheria IgG (24 mo). High Th2-associated CC-chemokine ligand 17 (CCL17) levels were associated with infant allergic disease (p < 0.05). In infants without, but not with, maternal history of allergy, the ω-3 supplementation was related to lower CCL17/CXC-chemokine ligand 11 (CXCL11) (Th2/Th1) ratios (p < 0.05). Furthermore, in nonallergic, but not in allergic infants, ω-3 supplementation was linked with higher Th1-associated CXCL11 levels (p < 0.05), as well as increased IgG titers to diphtheria (p = 0.01) and tetanus (p = 0.05) toxins. Thus, the prospect of balancing the infant immune system toward a less Th2-dominated response, by maternal ω-3 fatty acid supplementation, seems to be influenced by allergic status.

  • 56.
    Følsgaard, N V
    et al.
    Copenhagen University Hospital, Denmark.
    Chawes, B L K
    Copenhagen University Hospital, Denmark.
    Bønnelykke, K
    Copenhagen University Hospital, Denmark.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Bisgaard, H
    Copenhagen University Hospital, Denmark.
    Cord blood Th2-related chemokine CCL22 levels associate with elevated total-IgE during preschool age2012Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 42, nr 11, s. 1596-1603Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background

    Early-life immune deviation is suspected in the inception of atopic disease.

    Objective

    To investigate the association between cord blood chemokines and the subsequent development of atopic biomarkers and clinical end-points during the first 6 years of life.

    Methods

    The Th1-associated chemokines CXCL10 and CXCL11 and the Th2-associated chemokines CCL17 and CCL22 were assessed in cord blood of asymptomatic at-risk newborn children from the Copenhagen Prospective Study on Asthma in Childhood (COPSAC2000) birth cohort and associated with the longitudinal development of biomarkers and clinical end-points of asthma, eczema, and allergic rhinitis during the first 6 years of life.

    Results

    Cord blood CCL22 levels were significantly associated to total-IgE levels measured at four time-points during the first 6 years of life; overall odds ratio, 1.54 [CI, 1.25–1.89; < 0.0001]. CXCL10 and CXCL11 were not associated with development of any atopic disorders or biomarkers.

    Conclusion and Clinical Relevance

    High cord blood levels of the Th2 related chemokine CCL22 were significantly associated with high total- IgE levels during the first 6 years of life, but not with specific sensitization, asthma, eczema or allergic rhinitis. This suggests an inborn skewing of the immune system in healthy newborns developing elevated total- IgE later in life.

  • 57.
    Hales, B. J.
    et al.
    University of Western Australia, Australia.
    Hizawa, N.
    University of Tsukuba, Japan.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten.
    Sverremark-Ekstroem, E.
    Stockholm University, Sweden.
    Wardlaw, A. J.
    University of Leicester, England; Leicester NHS Trust, England.
    Developments in the field of allergy in 2014 through the eyes of Clinical and Experimental Allergy2015Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 45, nr 12, s. 1723-1745Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    The pathogenesis of asthma continues to be a major topic of interest to our authors with reviews and original papers on the role of viruses, mechanisms of inflammation, biomarkers, and phenotypes of asthma being major topics. A number of papers described new treatments for asthma focusing on blocking the Th2 response reflecting the fact that two decades of work in this area is finally bearing fruit. The pathogenesis of chronic rhinosinusitis is a growing area of interest, but there has been less on the genetics of airways disease than in previous years possibly reflecting the degree of rigour (and therefore a smaller body of work), with which these sorts of studies are now being undertaken. There continues to be a wide range of papers dealing with mechanisms of allergic disease ranging from clinical-based studies to basic research and the use of in vivo animal models especially mice. As before, mechanisms and new approaches to immunotherapy are common themes. Several were published in the allergens section investigating modification of allergens to increase their effectiveness and reduce the risk of adverse events. Risk factors for allergic disease was a common theme in the epidemiology section and food allergy a common theme in clinical allergy with papers on the development of protocols to induce tolerance and attempts to find biomarkers to distinguish sensitization from allergic disease. This was another exciting year for the editors, and we hope the readers of the journal.

  • 58.
    Jahnmatz, Maja
    et al.
    Public Health Agency Sweden, Sweden; Karolinska Institute, Sweden.
    Ljungman, Margaretha
    Public Health Agency Sweden, Sweden.
    Netterlid, Eva
    Public Health Agency Sweden, Sweden.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Nilsson, Lennart
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Hjärt- och Medicincentrum, Allergicentrum US. Public Health Agency Sweden, Sweden.
    Thorstensson, Rigmor
    Public Health Agency Sweden, Sweden.
    Pertussis-Specific Memory B-Cell and Humoral IgG Responses in Adolescents after a Fifth Consecutive Dose of Acellular Pertussis Vaccine2014Ingår i: Clinical and Vaccine Immunology, ISSN 1556-6811, E-ISSN 1556-679X, Vol. 21, nr 9, s. 1301-1308Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order to impede the increase in pertussis incidence in the adolescent group, a school-leaving booster dose administered at the age of 14 to 16 years will be introduced in Sweden in 2016. Preceding this introduction, an open-label, randomized, multicenter, clinical trial without a control group and with blinded analysis was performed, investigating both safety and immunogenicity. Reported here are the memory B-cell and serological responses detected in a smaller cohort (n = 34) of the 230 subjects recruited to the study. All subjects had received primary vaccination consisting of three doses of diphtheria-tetanus-5-component pertussis (DTaP5) vaccine, at 3, 5, and 12 months of age, and a tetanus-low-dose diphtheria-5-component pertussis (Tdap5) vaccine booster at 5.5 years. In this study, the subjects were randomly assigned and received either a Tdap1 or Tdap5 booster. Of the 230 participants, 34 subjects had samples available for evaluation of IgG-producing memory B-cell responses. Both vaccine groups had significant increases in pertussis toxin-specific serum IgG levels, but only the 1-component group showed significant increases in pertussis toxin-specific memory B cells. The 5-component group had significant increases in filamentous hemagglutinin- and pertactin-specific memory B-cell and serum IgG levels; these were not seen in the 1-component group, as expected. In conclusion, this study shows that a 5th consecutive dose of an acellular pertussis vaccine induces B-cell responses in vaccinated adolescents.

  • 59.
    Jakobsson, Hedvig E
    et al.
    Department of Preparedness, Swedish Institute for Communicable Disease Control, Solna, Sweden.
    Abrahamsson, Thomas
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för kliniska vetenskaper. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Jenmalm, Maria C
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Harris, Keith
    School of Engineering, University of Glasgow, Glasgow, UK .
    Quince, Christopher
    School of Engineering, University of Glasgow, Glasgow, UK .
    Jernberg, Cecilia
    Department of Preparedness, Swedish Institute for Communicable Disease Control, Solna, Sweden .
    Björkstén, Bengt
    Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden .
    Engstrand, Lars
    Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
    Andersson, Anders F
    KTH Royal Institute of Technology, Science for Life Laboratory, School of Biotechnology, Division of Gene Technology, Solna, Sweden.
    Decreased gut microbiota diversity, delayed Bacteroidetes colonisation and reduced Th1 responses in infants delivered by Caesarean section2014Ingår i: Gut, ISSN 0017-5749, E-ISSN 1468-3288, Vol. 63, nr 4, s. 559-566Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective The early intestinal microbiota exerts important stimuli for immune development, and a reduced microbial exposure as well as caesarean section (CS) has been associated with the development of allergic disease. Here we address how microbiota development in infants is affected by mode of delivery, and relate differences in colonisation patterns to the maturation of a balanced Th1/Th2 immune response.

    Design The postnatal intestinal colonisation pattern was investigated in 24 infants, born vaginally (15) or by CS (nine). The intestinal microbiota were characterised using pyrosequencing of 16S rRNA genes at 1 week and 1, 3, 6, 12 and 24 months after birth. Venous blood levels of Th1- and Th2-associated chemokines were measured at 6, 12 and 24 months.

    Results Infants born through CS had lower total microbiota diversity during the first 2 years of life. CS delivered infants also had a lower abundance and diversity of the Bacteroidetes phylum and were less often colonised with the Bacteroidetes phylum. Infants born through CS had significantly lower levels of the Th1-associated chemokines CXCL10 and CXCL11 in blood.

    Conclusions CS was associated with a lower total microbial diversity, delayed colonisation of the Bacteroidetes phylum and reduced Th1 responses during the first 2 years of life.

  • 60.
    Janefjord, Camilla
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Aniansson-Zdolsek, H
    Jenmalm, Maria
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Reduced IL-12 receptor beta 2 up-regulation after IL-2 and IL-12 stimulation in atopic children2002Ingår i: Allergy. European Journal of Allergy and Clinical Immunology, ISSN 0105-4538, E-ISSN 1398-9995, Vol. 57, s. 129-129Konferensbidrag (Övrigt vetenskapligt)
  • 61.
    Janefjord, Camilla
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    PHA-induced IL-12Rb2 mRNA expression in atopic and non-atopic children2001Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, Vol. 31, nr 10, s. 1493-1500Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background

    IL-12 is a strong inducer of Th1 responses. Stimulation via the CD2 receptor increases IFN-γ production and enhances the responsiveness of activated T-cells to IL-12, possibly due to an up-regulation of the signal transducing β2 chain of the IL-12 receptor (IL-12Rβ2). Atopic children have a reduced Th1-like immunity and a reduced CD2 expression. Our hypothesis is that atopic individuals have a reduced function of the CD2 pathway, causing reduced responsiveness to IL-12 and decreased IFN-γ production.

    Objective

    The aim was to study the mRNA expression of the IL-12Rβ2 chain, after stimulation via the CD2 pathway in peripheral blood mononuclear cells (PBMC), of atopic and non-atopic children, and to investigate correlations to the production of Th1 and Th2 cytokines.

    Materials and methods

    The study included 23 skin prick test positive, and 9 non-sensitized, 12-year-old children. PBMC were stimulated for 24 h with phytohemagglutinin (PHA) (2 µg/mL), which stimulates T cells through the CD2 pathway. Expression of IL-12Rβ2 mRNA was analysed by quantitative real time PCR and the cytokine production was detected with ELISA.

    Results

    Atopic and non-atopic children had similar baseline expression of IL-12Rβ2 mRNA, whereas PHA-induced IL-12Rβ2 mRNA expression was lower in atopic than in non-atopic children. The PHA-induced IL-12Rβ2 mRNA expression correlated well with the PHA-induced IFN-γ production and with the IFN-γ/IL-4 ratio.

    Conclusion

    PBMC from atopic children expressed less IL-12Rβ2 mRNA than non-atopic children after stimulation via the CD2 pathway (PHA). This may indicate a reduced capacity to respond to Th1-inducing stimuli in atopic children.

  • 62.
    Jarefors, Sara
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Janefjord, Camilla
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Forsberg, Pia
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Infektionsmedicin. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Medicincentrum, Infektionskliniken i Östergötland.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Decreased up-regulation of the interleukin-12Rbeta2-chain and interferon-gamma secretion and increased number of forkhead box P3-expressing cells in patients with a history of chronic Lyme borreliosis compared with asymptomatic Borrelia-exposed individuals2007Ingår i: Clinical and Experimental Immunology, ISSN 0009-9104, E-ISSN 1365-2249, Vol. 147, nr 1, s. 18-27Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Lyme borreliosis (LB) can, despite adequate antibiotic treatment, develop into a chronic condition with persisting symptoms such as musculoskeletal pain, subjective alteration of cognition and fatigue. The mechanism behind this is unclear, but it has been postulated that an aberrant immunological response might be the cause. In this study we investigated the expression of the T helper 1 (Th1) marker interleukin (IL)-12Rβ2, the marker for T regulatory cells, forkhead box P3 (FoxP3) and the cytokine profile in patients with a history of chronic LB, subacute LB, previously Borrelia-exposed asymptomatic individuals and healthy controls. Fifty-four individuals (12 chronic LB, 14 subacute LB, 14 asymptomatic individuals and 14 healthy controls) were included in the study and provided a blood sample. Mononuclear cells were separated from the blood and stimulated with antigens. The IL-12Rβ2 and FoxP3 mRNA expression was analysed with real-time reverse transcription–polymerase chain reaction (RT–PCR). The protein expression of IL-12Rβ2 on CD3+, CD4+, CD8+ and CD56+ cells was assessed by flow cytometry. Furthermore, the secretion of interferon (IFN)-γ, IL-4, IL-5, IL-10, IL-12p70 and IL-13 was analysed by enzyme-linked immunospot (ELISPOT) and/or enzyme-linked immunosorbent assay (ELISA). Chronic LB patients displayed a lower expression of Borrelia-specific IL-12Rβ2 on CD8+ cells and also a lower number of Borrelia-specific IFN-γ-secreting cells compared to asymptomatic individuals. Furthermore, chronic LB patients had higher amounts of Borrelia-specific FoxP3 mRNA than healthy controls. We speculate that this may indicate that a strong Th1 response is of importance for a positive outcome of a Borrelia infection. In addition, regulatory T cells might also play a role, by immunosuppression, in the development of chronic LB.

  • 63.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Childhood Immune Maturation and Allergy Development: Regulation by Maternal Immunity and Microbial Exposure2011Ingår i: AMERICAN JOURNAL OF REPRODUCTIVE IMMUNOLOGY, ISSN 1046-7408, Vol. 66, s. 75-80Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Problem The increasing allergy prevalence in affluent countries may be caused by reduced microbial stimulation, resulting in an abnormal post-natal immune maturation. Most studies investigating the underlying mechanisms have focused on post-natal microbial exposure. Also, the maternal microbial environment during pregnancy may program the immune development of the child, however. Method of study This review focuses on how maternal immunity and microbial exposures regulate childhood immune and allergy development. Results Prenatal environmental exposures may alter gene expression via epigenetic mechanisms, aiming to induce physiological adaptations to the anticipated post-natal environment, but potentially also increasing disease susceptibility in the offspring. Although the importance of fetal programming mostly has been studied in cardiovascular and metabolic disease, this hypothesis is also very attractive in the context of environmentally influenced immune-mediated diseases. Conclusion Efficacious preventive measures, required to combat the allergy epidemic, may be identified by determining how the immune interaction between mother and child is influenced by microbial factors.

  • 64.
    Jenmalm, Maria
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Role of infections in the immunological balance of infants.1999Ingår i: Caderos de Imuno-Alergologia Pediatrica (?),1999, 1999, s. 78-79Konferensbidrag (Refereegranskat)
  • 65.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Aniansson Zdolsek, Helena
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Holt, Patrocl G.
    TVW Telethon Institute for Child Health Research, Division of Cell Biology, Perth, Western Australia .
    Björkstén, Bengt
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Expression of and responses to CD2 and CD3 in 18-month-old children with and without atopic dermatitis2000Ingår i: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 11, nr 3, s. 175-182Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We hypothesize that atopy is associated with a reduced T-cell function early in life and an imbalance in cytokine production. The purpose of this study was to investigate the expression of and responses to CD2 and CD3 in children who did or did not develop atopic dermatitis early in life. The expression of CD2 and CD3 was analyzed by flow cytometry, and proliferation of CD2 and CD3 was studied by 3H-thymidine incorporation in phytohaemagglutinin (PHA)- and anti-CD3-stimulated peripheral blood mononuclear cells (PBMC) of 18-month-old children, 25 with and 29 without atopic dermatitis. Exogenous interleukin (IL)-2 was added to compensate for possible functional differences in accessory cells. Anti-CD3-induced secretion of IL-4, IL-5, IL-6, IL-10, IL-13, and interferon-γ (IFN-γ) was analyzed by enzyme-linked immunosorbent assay (ELISA). Atopy was associated with a low proportion of CD2+ lymphocytes. Responsiveness to PHA, which activates lymphocytes partly via the sheep erythrocyte receptor, CD2, was reduced in the allergic children. The anti-CD3-induced proliferation declined more rapidly with antibody dilution in the allergic than in the non-allergic children. Atopic dermatitis was associated with high levels of anti-CD3-stimulated IL-5 secretion. The IL-4/IL-10 and IL-4/IFN-γ ratios were higher in children with elevated total immunoglobulin E (IgE) levels. Skin prick test-negative children with eczema produced higher levels of IL-10 than skin prick test-positive children. In conclusion, atopic children have a reduced T-cell function. Atopic dermatitis is associated with increased IL-5 production, while high total IgE levels are associated with high IL-4/IFN-γ and IL-4/IL-10 ratios.

  • 66.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Björkstén, B
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Cord blood levels of immunoglobulin G subclass antibodies to food and inhalant allergens in relation to maternal atopy and the development of atopic disease during the first 8 years of life2000Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 30, nr 1, s. 34-40Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background: Factors that either protect from or enhance the development of atopic disease appear to be acting early in life. The gestational environment, including maternal immune responses, such as transplacentally transferred immunoglobulin (Ig) G antibodies to allergens, may be of importance in this respect, since allergen-specific immunity has been demonstrated to develop in utero. Objective: To evaluate the relation between cord blood IgG subclass antibodies to allergens, maternal atopy and development of atopic disease in the children. Material and methods: The study group comprised a cohort of 96 children participating in a prospective study up to 8 years of age. Cord blood IgG subclass antibodies to ovalbumin, ▀-lactoglobulin, Bet v 1 and cat dander were analysed by ELISA. Results: The levels of all IgG subclass antibodies to ovalbumin and rBet v 1 were higher in newborn infants with an atopic mother, as compared with babies with nonatopic mothers. IgG1 antibody levels to cat and IgG4 antibody levels to ▀-lactoglobulin and cat were also higher in atopic than in nonatopic mothers, whereas the other subclass antibody levels to those allergens were similar. High levels of cord blood IgG antibodies to cat and birch, but not to the food allergens, were associated with less atopic symptoms in the children during the first 8 years of life. Moreover, children who developed IgE antibodies to cat had lower levels of IgG antibodies to that allergen at birth. Conclusions: High levels of cord blood IgG subclass, especially IgG4, antibodies to food and inhalant allergens are associated with maternal atopy. High levels of IgG antibodies to inhalant, but not food, allergens are associated with less development of atopy in the children.

  • 67.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Björkstén, B
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Development of immunoglobulin G subclass antibodies to ovalbumin, birch and cat during the first eight years of life in atopic and non-atopic children.  1999Ingår i: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 10, s. 112-121Artikel i tidskrift (Refereegranskat)
  • 68.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Björkstén, B
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Macaubas, C
    Holt, BJ
    Smallacombe, TB
    Holt, PG
    Allergen-induced cytokine secretion in relation to atopic symptoms and immunoglobulin E and immunoglobulin G subclass antibody responses. 1999Ingår i: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 10, s. 168-177Artikel i tidskrift (Refereegranskat)
  • 69.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Institutionen för hälsa och miljö. Linköpings universitet, Hälsouniversitetet.
    Björkstén, Bengt
    Linköpings universitet, Institutionen för hälsa och miljö. Linköpings universitet, Hälsouniversitetet.
    Exposure to cow's milk during the first 3 months of life is associated with increased levels of IgG subclass antibodies to beta-lactoglobulin to 8 years1998Ingår i: Journal of Allergy and Clinical Immunology, ISSN 0091-6749, E-ISSN 1097-6825, Vol. 102, s. 671-678Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND:

    Exposure to allergens early in life influences the development of allergen-specific immune responses. In animal models, the development of tolerance to proteins delivered to the gastrointestinal and the respiratory mucosa is influenced by age and genetic background. Late introduction of cow's milk in infants is associated with slower increase and lower peak IgG antibody responses to milk during early childhood, but the long-term effects have not been investigated, nor is the relation to atopic disease later in life clear.

    OBJECTIVE:

    The purpose of this study was to investigate the development of IgG subclass antibodies to beta-lactoglobulin in relation to early exposure to cow's milk, atopic heredity, and the development of atopic disease.

    METHODS:

    IgG subclass antibodies to beta-lactoglobulin were analyzed by ELISA at birth, at 6 and 18 months, and at 8 years in 96 children followed prospectively.

    RESULTS:

    The levels of IgG subclass antibodies to beta-lactoglobulin peaked in early childhood and then declined up to 8 years of age. Exposure to cow's milk during the first 3 months of life was associated with high IgG subclass antibody levels to beta-lactoglobulin up to 8 years, particularly in children with maternal atopy. Children with atopic symptoms and sensitivity to allergens often had high levels of IgG4 antibodies to beta-lactoglobulin at 8 years of age, even if they were not exposed to cow's milk during the first 3 months of life. Furthermore, atopic dermatitis was associated with high levels of IgG subclass antibodies to beta-lactoglobulin in early childhood.

    CONCLUSIONS:

    IgG subclass antibody levels to milk peak during early infancy, with particularly high levels in children with atopic dermatitis, and decline thereafter. Exposure to cow's milk during early infancy has long-lasting effects on the humoral antigen-specific responses, indicating less effective tolerance-inducing mechanisms in the intestinal mucosa during the first months of life.

  • 70.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Björkstén, Bengt
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Immune responses to birch during the first seven pollen seasons of life2001Ingår i: International Archives of Allergy and Immunology, ISSN 1018-2438, E-ISSN 1423-0097, Vol. 124, nr 1-3, s. 321-323Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]

    Background: Exposure to allergens early in life may have an impact on the incidence of allergy many years later, but the kinetics of the immune responses have still not been studied prospectively. Therefore, we wanted to study the development of immune responses of the Th1 and Th2 type to birch over the first pollen seasons. Material and Methods: Blood samples were obtained from 21 prospectively followed children during the second to the seventh pollen season of life. IgG subclass antibodies to rBet v 1 were analyzed by ELISA, IgE antibodies to birch with Magic Lite™ and birch-induced mononuclear cell proliferation by 3H-thymidine incorporation. Results: Proliferative responses and IgG1 antibodies were commonly seen both in children with and without allergic symptoms and sensitization to birch. Most nonsensitized children had a transient IgG4 antibody response, which was downregulated after the third pollen season, while the titers of this Th2-associated subclass increased with age in sensitized children with clinical symptoms to birch. Conclusions: Immune responses to birch can be demonstrated in children regardless of atopic status. A transient early Th2-like response is downregulated after the third pollen season in nonatopic but not atopic children. Copyright © 2001 S. Karger AG, Basel.

  • 71.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Development of IgG subclass antibodies to allergens in early childhood1999Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Background: Immune responses to allergens in young children include both Thl and Th2 like immunity, which may regulate the secretion of IgG subclass antibodies differently. The time, route and level of exposure to an allergen, as well as maternally transferred immunity, may be decisive whether sensitisation or tolerance will ensue. To study this, we established sensitive methods and investigated the development of IgG subclass antibodies to food and inhalant allergens during childhood.

    Material and Methods: The study group comprised a cohort of 96 children participating in a prospective study. IgG subclass antibodies to ß-lactoglobulin, ovalbumin, Bet v 1 and cat dander were analysed at birth, 6 and 18 months and 8 years by ELISA. At 8 years of age, PBMC from 55 of the children were stimulated with birch and ß-lactoglobulin. Production of IL-5, IL-6, IL-10, IL-13 and IFN-y was analysed by ELISA and expression of IL-4 and IL-9 mRNA by semiquantitative RTPCR.

    Results: High cord blood levels of IgG antibodies to inhalant, but not to food, allergens were associated with less development of atopy in the children during the first eight years of life. IgG subclass antibody responses to allergens were commonly detected during childhood and were largely restricted to the IgG1 subclass. The production of this opsonising and complement activating subclass was associated with Thllike immunity at 8 years of age. IgG subclass antibodies to food allergens peaked in infancy, whereas antibodies to the inhalant perennial allergen cat, but not the inhalant seasonal allergen birch, increased with age. Exposure to cow's milk during the first three months of life was associated with high IgG subclass antibodies to ß-lactoglobulin up to eight years. Exposure to cat and birch tended to be associated with high antibody levels to those allergens, whereas antibody levels to ovalbumin were not related to the introduction of egg in the diet. Atopic symptoms and the presence of positive skin prick tests and circulating IgE antibodies to allergens were associated with high levels of IgG subclass, especially Th2 associated IgG4, antibody responses to allergens. For the food allergens, the differences were mostly marked early in life. Birch induced IL-4 expression may be the major factor determining IgE antibody formation to that allergen, while allergen induced IL-5, IL-6 and IL-10 secretion in PBMC was associated with atopic symptoms.

    Conclusions: Maternally derived antibodies may modulate immune responses. The tolerance-inducing mechanisms in the intestinal mucosa may be less effective during the first months of life. Responses to food and inhalant allergens show different kinetics. Thl like associated IgG1 antibodies to allergens are commonly observed in both atopic and non-atopic children, whereas Th2 like associated IgG4 responses are more atopy dependent.

  • 72.
    Jenmalm, Maria
    et al.
    SP Biopharma.
    Cherwinski, Holly
    SP Biopharma, Palo Alto USA.
    Bowman, Edward P
    SP Biopharma, Palo Alto USA.
    Phillips, Joseph H
    Eli Lilly and Company, Indianapolis, USA.
    Sedgewick, Jonathon D
    Eli Lilly and Company, Indianapolis, USA.
    Regulation of myeloid cell function through the CD200 receptor2006Ingår i: Journal of Immunology, ISSN 0022-1767, E-ISSN 1550-6606, Vol. 176, nr 1, s. 191-199Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Myeloid cells play pivotal roles in chronic inflammatory diseases through their broad proinflammatory, destructive, and remodeling capacities. CD200 is widely expressed on a variety of cell types, while the recently identified CD200R is expressed on myeloid cells and T cells. CD200 deletion in vivo results in myeloid cell dysregulation and enhanced susceptibility to autoimmune inflammation, suggesting that the CD200-CD200R interaction is involved in immune suppression. We demonstrate in this study that CD200R agonists suppress mouse and human myeloid cell function in vitro, and also define a dose relationship between receptor expression and cellular inhibition. IFN-γ- and IL-17-stimulated cytokine secretion from mouse peritoneal macrophages was inhibited by CD200R engagement. Inhibitory effects were not universal, as LPS-stimulated responses were unaffected. Inhibition of U937 cell cytokine production correlated with CD200R expression levels, and inhibition was only observed in low CD200R expressing cells, if the CD200R agonists were further cross-linked. Tetanus toxoid-induced human PBMC IL-5 and IL-13 secretion was inhibited by CD200R agonists. This inhibition was dependent upon cross-linking the CD200R on monocytes, but not on cross-linking the CD200R on CD4+ T cells. In all, we provide direct evidence that the CD200-CD200R interaction controls monocyte/macrophage function in both murine and human systems, further supporting the potential clinical application of CD200R agonists for the treatment of chronic inflammatory diseases. Copyright © 2005 by The American Association of Immunologists, Inc.

  • 73.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet.
    Duchén, Karel
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Timing of allergy-preventive and immunomodulatory dietary interventions: are prenatal, perinatal or postnatal strategies optimal?2013Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 43, nr 3, s. 273-278Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    The increasing allergy prevalence in affluent countries may be caused by reduced microbial stimulation and a decreased dietary ω-3/ω-6 long-chain polyunsaturated fatty acid (LCPUFA) ratio, resulting in an abnormal postnatal immune maturation. The timing of allergy-preventive probiotic and ω-3 LCPUFA interventions is critical, as early-life events occurring during critical windows of immune vulnerability can have long-term impact on immune development. The maternal dietary and microbial environment during pregnancy may programme the immune development of the child. Prenatal environmental exposures may alter gene expression via epigenetic mechanisms, aiming to induce physiological adaptations to the anticipated postnatal environment, but potentially also increasing disease susceptibility in the offspring if exposures are mismatched. Although the importance of fetal programming mostly has been studied in cardiovascular and metabolic disease, this hypothesis is also very attractive in the context of environmentally influenced immune-mediated diseases. This review focuses on how prenatal, perinatal or postnatal ω-3 LCPUFA interventions regulate childhood immune and allergy development, and if synergistic effects may be obtained by simultaneous probiotic supplementation. We propose that combined pre- and postnatal preventive measures may be most efficacious. Increasing knowledge on the immunomodulatory effects of prenatal, perinatal and postnatal interventions will help to direct future strategies to combat the allergy epidemic.

  • 74.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Macaubas, C
    Fac Hlth Sci, Div Paediat, Linkoping, Sweden TVW Telethon Inst Child Hlth Res, Perth, WA, Australia.
    Holt, P
    Holt, B
    Smallacombe, T
    Fac Hlth Sci, Div Paediat, Linkoping, Sweden TVW Telethon Inst Child Hlth Res, Perth, WA, Australia.
    Björkstén, Bengt
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn- och ungdomskliniken i Linköping.
    Allergen induced cytokine responses at birth in relation to development of atopic disease and sensitisation2000Ingår i: Journal of Allergy and Clinical Immunology, ISSN 0091-6749, E-ISSN 1097-6825, Vol. 105, nr 1, s. 329-Konferensbidrag (Övrigt vetenskapligt)
  • 75.
    Jenmalm, Maria
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik.
    Van Snick, J
    Cormont, F
    Salman, Beata
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik.
    Allergen-induced Th1 and Th2 cytokine secretion in relation to specific allergen sensitization and atopic symptoms in children2001Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 31, nr 10, s. 1528-1535Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background: Allergic diseases are believed to be due to T helper (Th)2-like immunity to allergens in affected tissues, and immune responses to allergens are characterized by a cross-regulation between Th1 and Th2 cells. Atopic individuals may develop IgE antibodies to only one or more allergens. However, the mechanisms behind sensitization to a specific allergen, e.g. why an individual develops IgE to cat but not birch, are not known. Our aim was to study birch- and cat-induced Th1 and Th2 cytokine secretion in children who were sensitized to birch but not to cat, and vice versa. Materials and methods: The subjects in the study were 60 12-year-old children. Seventeen of the children were sensitized (skin prick test and circulating IgE positive) to birch but not cat, 13 were sensitized to cat but not birch, 11 were sensitized both to birch and cat, and 19 children were skin prick test and circulating IgE negative. Forty-six children had a history of atopic symptoms, and 42 of them had current symptoms. Peripheral blood mononuclear cells were separated from venous blood and stimulated with cat or birch allergen. The levels of IL-4, IL-5, IL-9, IL-10, IL-13 and IFN-? in the cell supernatants were analysed by ELISA. Results: Sensitized children produced more of the Th2 cytokines IL-4, IL-5, IL-9 and IL-13 than non-sensitized atopic and non-atopic children in response to stimulation with the allergen they were sensitized to. High levels of the Th2 cytokines IL-4 and IL-5 and low levels of the anti-inflammatory cytokine IL-10 were associated with atopic symptoms, and high cat-induced IL-9 levels with asthma. Conclusions: The Th2 cytokines IL-4, IL-5, IL-9 and IL-13 were all commonly detected in sensitized children after stimulation with the specific, in contrast to an unrelated, allergen. Atopic symptoms were associated with increased levels of IL-4 and IL-5 and tended to be associated with low levels of IL-10, and asthma with high cat-induced IL-9 levels.

  • 76.
    Kvarnström, Maria
    et al.
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Effect of cryopreservation on expression of Th1 and Th2 cytokines in blood mononuclear cells from patients with different cytokine profiles, analysed with three common assays: an overall decrease of interleukin-4: An overall decrease of interleukin-42004Ingår i: Cryobiology, ISSN 0011-2240, E-ISSN 1090-2392, Vol. 49, nr 2, s. 157-168Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Studies on cytokine expression in blood cells are commonly performed on cryopreserved cells. Previous studies show that cryopreservation affects cytokine expression, but the findings are not consistent. This may be due to divergent effects of freezing on different cytokines, different stimuli, and different patient groups or to the use of different assays in the studies. This study was designed to investigate the effect of freezing on spontaneous, auto-antigen, allergen, and mitogen induced cytokine secretion from peripheral blood mononuclear cells from several groups of patients expressing different cytokine profiles; multiple sclerosis, atopic children, non-atopic children, and pregnant women. The expression of IFN-γ, IL-4, IL-5, IL-9, IL-10, and IL-13 was analysed with ELISA, ELISPOT and/or real time RT-PCR. Our data provide evidence that the process of cryopreservation and thawing does affect the expression of cytokines, both at the protein and the mRNA level. Moreover, the effect varied among different cytokines, different stimuli, and different patient groups, which partly may be explained by differences in optimal freezing conditions for non-activated and activated cells. An increase of allergen and PHA stimulated IFN-γ secretion in atopic children was found following cryopreservation, but no such increase in auto-antigen induced IFN-γ was seen in MS-patients. The most consistent finding was that expression of IL-4 was generally decreased in spontaneous and auto-antigen/allergen induced expression in cryopreserved cells. In conclusion, this study points out the importance of investigation of the effects of freezing for each cytokine, stimuli and patient group before using frozen cells in studies of in vitro cytokine secretion.

  • 77.
    Lundberg, Anna
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Fagerås Böttcher, Malin
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Tomičić, Sara
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Voor, Tina
    Children’s Clinic of Tartu University Clinics, 51014 Tartu, Estonia.
    Jenmalm, Maria C:
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Lower LPS responsiveness in Estonian than Swedish infants associates with less allergy development and high endotoxin exposureManuskript (Övrigt vetenskapligt)
    Abstract [en]

    Background: Allergic diseases have increased in the last decades, particularly in countries with an affluent lifestyle, possibly due to a reduced or altered microbial exposure during infancy.

    Objective: The aim of this study was to follow lipopolysaccharide (LPS) induced immune responses prospectively in infants from Estonia and Sweden, i.e. two countries with different frequencies of allergic disease and a different domestic endotoxin exposure. '

    Methods: The study included 14 Estonian and 36 Swedish infants who were followed prospectively from birth up to two years of age regarding development of allergy using questionnaires, clinical examinations and skin prick tests. Isolated cord blood mononuclear cells (birth) and peripheral blood mononuclear cells (obtained at 3, 6, 12 and 24 months) were cultured for 24h with LPS in combination with IFN-γ. The secretion of IL-6, CXCL8 (IL-8), IL-10, IL12p70, IL-17, IL-1β, CCL2 (MCP-1), CCL4 (MIP-1β) and TNF was analysed with a Luminex assay.

    Results: The Swedish, as compared to Estonian children, had higher levels of LPS/IFN-γ induced CCL4 and IL-6 at birth and of IL-1β, IL-12p70, IL-17 and TNF at 3 months as well as IL-6 at 6 months. Also, the levels of CCL2 at 3 and 6 months of age and CCL4 and TNF at 6 months of age were higher in Swedish than Estonian infants in unstimulated cultures. Sensitised Swedish infants had higher levels of LPS/IFN-γ induced IL-10 at 3 and 12 months of age compared to non-sensitised Swedish infants.

    Conclusion: The enhanced LPS/IFN-γ induced cytokine and chemokine secretion in Swedish, compared to Estonian infants may support a less rapid induction of immune regulation in an affluent society. This could possibly be due to a reduced microbial pressure on Swedish children during early childhood.

  • 78.
    Lundberg, Anna
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Jenmalm, Maria C:
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Jimenez, Enrique
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Fagerås Böttcher, Malin
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik.
    Expression of toll-like receptors and immune-regulatory markers during early infancy and allergy development in Estonian and Swedish infantsManuskript (Övrigt vetenskapligt)
    Abstract [en]

    Background: Allergies have increased during the last decades with the highest prevalences in countries with a Westernised lifestyle. As microbial activation might be required for an accurate maturation of the immune system, a reduced or altered microbial exposure during infancy has been suggested as a possible cause for the increase of allergic diseases in affluent countries.

    Aim: The aim of this study was to investigate the gene expression of TLR2, TLR4, Foxp3, Ebi3 and SOCS3 involved in LPS signaling pathways and immune regulation in two prospectively followed birth cohorts, one from Estonia and one from Sweden, in relation to domestic endotoxin levels and allergy development.

    Material and methods: Twenty-three children from Estonia and 52 from Sweden were followed from birth to five years of age regarding allergy development using questionnaires, clinical examinations and skin prick tests. RNA was isolated from unstimulated peripheral blood mononuclear cells (PBMC) in samples collected at birth, 3, 6, 12 and 24 months of age. mRNA expression of TLR2, TLR4, SOCS3, Ebi3 and Foxp3 was analysed with real-time RTPCR. The mRNA expression of the genes were compared to previously obtained data of LPS/IFN-γ induced cytokine and chemokine PBMC secretion at the corresponding time-points and also to domestic endotoxin levels.

    Results: The Estonian infants had higher mRNA expression of the two regulatory T cell (Treg) associated markers Foxp3 and Ebi3 at birth than the Swedish infants. The Foxp3 and Ebi3 expression correlated at all time-points. The mRNA expression of TLR2, TLR4 and SOCS3 was similar in Estonian and Swedish infants at all ages. None of the genes were associated with endotoxin levels.TLR4 mRNA expression correlated positively with cytokines that were upregulated by LPS/IFN- γ stimulation, but was negatively correlated to CCL2 secretion which was downregulated by the stimulation. Low expression of TLR2 mRNA at birth was found in Swedish children who were allergic at 5 years of age. Sensitisation up to 5 years of age was associated with low Ebi3 expression at birth.

    Conclusion: Estonian children are born with enhanced Ebi3 and Foxp3 expression compared to Swedish children, suggesting an increased capacity for early immune regulation among infants from a country with a low prevalence of allergic disease. An increased early capacity to respond to TLR2 ligands, i.e. Gram positive bacteria, may protect against allergy development.

  • 79. Macaubas, C
    et al.
    Sly, PD
    Burton, P
    Tiller, K
    Yabuhara, A
    Holt, BJ
    Smallacombe, TB
    Kendall, G
    Jenmalm, Maria
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Regulation of T-helper cell responses to inhalant allergen during early childhood. 1999Ingår i: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 29, s. 1223-1231Artikel i tidskrift (Refereegranskat)
  • 80.
    Mai, Xiaomei
    et al.
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Gäddlin, Per-Olof
    Central Hospital, Jönköping, Sweden.
    Nilsson, Lennart
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Finnström, Orvar
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Björkstén, Bengt
    Centre for Allergy Research and Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Leijon, Ingemar
    Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Asthma, lung function and allergy in 12-year-old children with very low birth weight: a prospective study2003Ingår i: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 14, nr 3, s. 184-192Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We assessed the relationship between very low birth weight (VLBW) (≤1500 g) and the development of asthma, lung function and atopy. The study groups comprised 74 of all 86 (86%) VLBW and 64 of all 86 (74%) matched term children who were prospectively followed for 12 years. A questionnaire on asthmatic and allergic symptoms was completed and skin prick tests, spirometry and hypertonic saline provocation tests were performed at 12 years of age. Cytokine secretion was analysed in stimulated blood leukocyte cultures in 28 VLBW and 23 term children. A history of asthma was more frequent among the VLBW children, as compared with the term children at age 12 (22% vs. 9%, p = 0.046). Among the VLBW children, very preterm birth (gestational age: week 25 to 29) (RR 2.5, 95%CI 1.1–5.8), neonatal mechanical ventilation (RR 2.8, 95%CI 1.2–6.4) and neonatal oxygen supplementation (RR 4.3, 95%CI 1.3–14.0) were significantly associated with a history of asthma by the age of 12 years in univariate analyses. In multivariate logistic regression, neonatal oxygen supplementation ≥ 9 days was the only remaining significant risk factor for a history of asthma (adjusted OR 6.7, 95%CI 1.0–44). The VLBW children who required mechanical ventilation during the neonatal period were more likely to have bronchial hyperresponsiveness than those not requiring mechanical ventilation (60% vs. 28%, p = 0.050). The spirometric values were similar among the VLBW and the term children at 12 years. Very low birth weight was not significantly related to allergic rhinoconjunctivitis, eczema or positive skin prick tests. Furthermore, the levels of IL-4, IL-5 and IFN-γ in stimulated cell cultures were similar in the VLBW and the term children. A history of asthma by 12 years of age was twice as common among the VLBW as the term children, and neonatal oxygen supplementation seemed to be associated with the increased risk. Furthermore, mechanical ventilation during the neonatal period was associated with bronchial hyperresponsiveness at age 12. Very low birth weight per se was not, however, related to atopy.

  • 81.
    Mellergård, Johan
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Neurologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Närsjukvården i centrala Östergötland, Neurologiska kliniken.
    Edström, Måns
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Dahle, Charlotte
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Vrethem, Magnus
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Neurologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Närsjukvården i centrala Östergötland, Neurologiska kliniken.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    An Increase in B cell and Cytotoxic NK cell Proportions and Increased T cell Responsiveness in Blood of Natalizumab-treated Multiple Sclerosis Patients2013Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 8, nr 12, artikel-id e81685Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background

    Changes in the peripheral blood lymphocyte composition probably both mediate and reflect the effects of natalizumab treatment in multiple sclerosis, with implications for treatment benefits and risks.

    Objectives

    To assess changes in circulating lymphocyte subpopulation compositions and T-cell responses during natalizumab treatment.

    Material and methods

    A broad panel of markers for blood lymphocyte populations, including states of activation and co-stimulation as well as T-cell responses to recall antigens and mitogens, was assessed by flow cytometry in 40 patients with relapsing multiple sclerosis before and after one-year natalizumab treatment.

    Results

    Absolute numbers of all major populations of lymphocytes increased after treatment, most markedly for NK- and B-cells. The fraction of both memory and presumed regulatory B-cell subsets increased, as did CD3-CD56dim cytotoxic NK-cells, whereas CD3-CD56bright regulatory NK-cells decreased. Treatment was also associated with a restored T-cell responsiveness to recall antigens and mitogens.

    Conclusions

    Our data confirms that natalizumab treatment increases the number of lymphocytes in blood, likely mirroring the expression of VLA-4 being highest on NK- and B-cells. This supports reduction of lymphocyte extravasation as a main mode of action, although the differential composition of lymphocyte subpopulations suggests cell-signalling effects may also be operative. The systemic increase in T-cell responsiveness reflects the increase in numbers, and while augmenting anti-infectious responses systemically, localized responses become correspondingly decreased.

  • 82.
    Mjösberg, Jenny
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    FOXP3+ regulatory T cells, T helper 1, T helper 2 and T helper 17 cells in human early pregnancy decidua2010Ingår i: Biology of Reproduction, ISSN 0006-3363, E-ISSN 1529-7268, Vol. 82, nr 4, s. 698-705Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In pregnancy, the decidua is infiltrated by leukocytes promoting fetal development without causing immunological rejection. Murine regulatory T (Treg) cells are known to be important immune regulators at this site. The aim of the study was to characterize the phenotype and origin of Treg cells and determine the quantitative relationship between Treg, T-helper type 1 (TH1), TH2, and TH17 cells in first-trimester human decidua. Blood and decidual CD4+ T cells from 18 healthy first-trimester pregnant women were analyzed for expression of Treg-cell markers (CD25, FOXP3, CD127, CTLA4, and human leukocyte antigen-DR [HLA-DR]), chemokine receptors (CCR4, CCR6, and CXCR3), and the proliferation antigen MKI67 by six-color flow cytometry. Treg cells were significantly enriched in decidua and displayed a more homogenous suppressive phenotype with more frequent expression of FOXP3, HLA-DR, and CTLA4 than in blood. More decidual Treg cells expressed MKI67, possibly explaining their enrichment at the fetal-maternal interface. Using chemokine receptor expression profiles of CCR4, CCR6, and CXCR3 as markers for TH1, TH2, and TH17 cells, we showed that TH17 cells were nearly absent in decidua, whereas TH2-cell frequencies were similar in blood and decidua. CCR6+ TH1 cells, reported to secrete high levels of interferon gamma (IFNG), were fewer, whereas the moderately IFNG-secreting CCR6 TH1 cells were more frequent in decidua compared with blood. Our results point toward local expansion of Treg cells and low occurrence of TH17 cells. Furthermore, local, moderate TH1 activity seems to be a part of normal early pregnancy, consistent with a mild inflammatory environment controlled by Treg cells.

  • 83.
    Mjösberg, Jenny
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Boij, Roland
    Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Matthiesen, Leif
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Circulating CD4dimCD25highFOXP3+ regulatory T cells in severe early-onset preeclampsiaManuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    Preeclampsia is an inflammatory condition suggested to involve regulatory CD4+CD25high T helper cell (Treg) disturbances. However, the importance of Tregs in early-onset preeclampsia, associated with increased disease severity and possibly representing a more distinct placental disease, remains unclear. We recently showed that by defining Tregs as CD4dimCD25high cells, the risk of including activated non-Tregs, being more prominent in the circulation during pregnancy, is avoided. The aim of this study was to determine, using updated Treg markers and flow cytometric gating strategies, the frequency and phenotype of circulating Tregs from women with severe early-onset preeclampsia (n=10) as compared with healthy pregnant (n=20) and nonpregnant (n=20) women. The frequency of CD4dimCD25high cells and the expression of FOXP3 was similar in healthy and preeclamptic pregnancy. However, the occurrence of CTLA-4+ and HLA-DR+ cells in the Treg population from preeclamptic women tended to be higher than in healthy pregnant women, indicating alterations in Treg functionality in preeclampsia. Further, the Treg population from healthy pregnant, but not preeclamptic, women tended to be enriched for CCR4+ and CD45R0+ cells as compared with nonpregnant women. In conclusion, although the findings do not support a role for diminished circulating Treg frequency in severe early-onset preeclampsia, the study suggests functional alterations related to Treg suppression, activation and migration mechanisms in this subgroup of preeclamptic women.

  • 84.
    Mjösberg, Jenny
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Enrichment of Foxp3(+) T-regs and reduction of T(H)17 cells in human early pregnancy decidua indicate immunosuppressive T cell dominance2009Ingår i: in JOURNAL OF REPRODUCTIVE IMMUNOLOGY vol 81, issue 2, 2009, Vol. 81, nr 2, s. 147-147Konferensbidrag (Refereegranskat)
    Abstract [en]

    n/a

  • 85.
    Mjösberg, Jenny
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Svensson, J
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Johansson, E
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Hellstrom, L
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Casas, Rosaura
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Boij, R
    Ryhov Hospital.
    Matthiesen, L
    Helsingborg Hospital.
    Jönsson, Jan-Ingvar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Experimentell hematologi. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Systemic reduction of functionally suppressive CD4dimCD25highFoxp3+ T-regs in human second trimester pregnancy is induced by progesterone and 17 beta-estradiol2009Ingår i: Journal of Reproductive Immunology(ISSN 0165-0378), vol 81, issue 2, 2009, Vol. 81, nr 2, s. 160-161Konferensbidrag (Refereegranskat)
    Abstract [en]

    CD4+CD25high regulatory T cells (Tregs) are implicated in maintenance of murine pregnancy. However, reports regarding circulating Treg frequencies in human pregnancy are inconsistent and the functionality and phenotype of these cells in pregnancy have not been clarified. The aim was to determine the frequency, phenotype and function of circulating Tregs in second trimester human pregnancy and the influence of progesterone and 17β-estradiol on Treg phenotype and frequency. Based on expression of Foxp3, CD127 and HLA-DR, as determined by multi-color flow cytometry, we defined a proper CD4dimCD25high Treg population and showed, in contrast to most previous reports, that this population was reduced in second trimester pregnancy. Unexpectedly, Foxp3 expression was decreased in the Treg, as well as in the CD4+ population. These changes could be replicated in an in vitro system resembling the pregnancy hormonal milieu, where 17β-estradiol, and in particular progesterone, induced, in line with the pregnancy situation, a reduction of CD4dimCD25highFoxp3+ cells in PBMC from non-pregnant women. By co-culturing FACS-sorted Tregs and autologous CD4+CD25- responder cells, we showed that Tregs from pregnant women still displayed the same suppressive capacity as non-pregnant women in terms of suppressing IL-2, TNF-α and IFN-γ secretion from responder cells while efficiently producing IL-4 and IL-10. Our findings support the view of hormones, particularly progesterone, as critical regulators of Tregs in pregnancy. Further, we suggest that in the light of the results of this study, early data on circulating Treg frequencies in pregnancy need re-evaluation.

  • 86.
    Mjösberg, Jenny
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Svensson, Judit
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Johansson, Emma
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Hellström, Lotta
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Geriatrik. Linköpings universitet, Hälsouniversitetet.
    Casas, Rosaura
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Boij, Roland
    Ryhov Hospital, Jönköping, Sweden.
    Matthiesen, Leif
    Helsingborg Hospital, Helsingborg, Sweden.
    Jönsson, Jan-Ingvar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Cellbiologi. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Systemic reduction of functionally suppressive CD4dimCD25highFoxp3+ Tregs in human second trimester pregnancy is induced by progesterone and 17θ-estradiol2009Ingår i: Journal of Immunology, ISSN 0022-1767, E-ISSN 1550-6606, Vol. 183, nr 1, s. 759-769Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CD4+CD25high regulatory T cells (Tregs) are implicated in the maintenance of murine pregnancy. However, reports regarding circulating Treg frequencies in human pregnancy are inconsistent, and the functionality and phenotype of these cells in pregnancy have not been clarified. The aim of this study was to determine the frequency, phenotype, and function of circulating Tregs in the second trimester of human pregnancy and the influence of progesterone and 17β-estradiol on Treg phenotype and frequency. Based on expressions of Foxp3, CD127, and HLA-DR as determined by multicolor flow cytometry, we defined a proper CD4dimCD25high Treg population and showed, in contrast to most previous reports, that this population was reduced in second trimester of pregnancy. Unexpectedly, Foxp3 expression was decreased in the Treg, as well as in the CD4+ population. These changes could be replicated in an in vitro system resembling the pregnancy hormonal milieu, where 17β-estradiol, and in particular progesterone, induced, in line with the pregnancy situation, a reduction of CD4dimCD25highFoxp3+ cells in PBMC from nonpregnant women. By coculturing FACS-sorted Tregs and autologous CD4+CD25 responder cells, we showed that Tregs from pregnant women still displayed the same suppressive capacity as nonpregnant women in terms of suppressing IL-2, TNF-, and IFN- secretion from responder cells while efficiently producing IL-4 and IL-10. Our findings support the view of hormones, particularly progesterone, as critical regulators of Tregs in pregnancy. Furthermore, we suggest that in the light of the results of this study, early data on circulating Treg frequencies in pregnancy need reevaluation.

    The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked advertisement in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.

  • 87.
    Nilsson, Lennart
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Hjärt- och Medicincentrum, Allergicentrum US.
    Brockow, Knut
    Technical University Munich, Munich, Germany.
    Alm, Johan
    Karolinska Institutet, Södersjukhuset, Stockholm, Sweden.
    Cardona, Victoria
    Hospital Universitari Vall d'Hebron, Barcelona, Spain.
    Caubet, Jean-Christoph
    University of Geneva, Genève, Switzerland.
    Gomes, Eva
    CHP, Porto, Portugal.
    Jenmalm, Maria Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten.
    Lau, Susanne
    Charité Universitätsmedizin, Berlin, Germany.
    Netterlid, Eva
    Lund University, Malmö, The Public Health Agency of Sweden, Stockholm, Sweden.The University of Edinburgh, Edinburgh, UK.
    Schwarze, Jürgen
    The University of Edinburgh, Edinburgh, UK.
    Sheikh, Aziz
    The University of Edinburgh, Edinburgh, UK..
    Storsaeter, Jann
    Norwegian Institute of Public Health, Oslo, Norway.
    Skevaki, Chrysanthi
    Philipps University Marburg, University Hospital Giessen and Marburg GmbH, Marburg, Germany.
    Terreehorst, Ingrid
    Department of ENT, AMC, Amsterdam, the Netherlands.
    Zanoni, Giovanna
    Immunology Unit, University Hospital, Verona, Italy.
    Vaccination and allergy: EAACI position paper, practical aspects2017Ingår i: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Immunization is highly effective in preventing infectious diseases and therefore an indispensable public health measure. Allergic patients deserve access to the same publicly recommended immunizations as nonallergic patients unless risks associated with vaccination outweigh the gains. Whereas the number of reported possible allergic reactions to vaccines is high, confirmed vaccine-triggered allergic reactions are rare. Anaphylaxis following vaccination is rare, affecting less than 1/100,000, but can occur in any patient. Some patient groups, notably those with a previous allergic reaction to a vaccine or its components, are at heightened risk of allergic reaction and require special precautions. Allergic reactions, however, may occur in patients without known risk factors and cannot be predicted by currently available tools. Unwarranted fear and uncertainty can result in incomplete vaccination coverage for children and adults with or without allergy. In addition to concerns about an allergic reaction to the vaccine itself, there is fear that routine childhood immunization may promote the development of allergic sensitization and disease. Thus, although there is no evidence that routine childhood immunization increases the risk of allergy development, such risks need to be discussed. This article is protected by copyright. All rights reserved.

  • 88. Oldeaus, G
    et al.
    Björkstén, B
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Jenmalm, Maria
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Kjellman, Max
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Cow's milk IgE and IgG antibody responses to cow's milk formulas. 1999Ingår i: Allergy. European Journal of Allergy and Clinical Immunology, ISSN 0105-4538, E-ISSN 1398-9995, Vol. 54, s. 352-357Artikel i tidskrift (Refereegranskat)
  • 89.
    Persson, M
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Jablonowska, Barbara
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Jonsson, Yvonne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Cytokine networks for implantation and early pregnancy: immunologic status in patients undergoing in vitro fertilization in JOURNAL OF REPRODUCTIVE IMMUNOLOGY, vol 90, issue 2, pp 166-1662011Ingår i: JOURNAL OF REPRODUCTIVE IMMUNOLOGY, Elsevier , 2011, Vol. 90, nr 2, s. 166-166Konferensbidrag (Refereegranskat)
    Abstract [en]

    n/a

  • 90.
    Persson, Marie
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Matthiesen, Leif
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Jonsson, Yvonne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Sandberg, Martina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping. Linköpings universitet, Hälsouniversitetet.
    Increased circulating paternal antigen-specific IFN-γ- and IL-4-secreting cells during pregnancy in allergic and non-allergic women2008Ingår i: Journal of Reproductive Immunology, ISSN 0165-0378, E-ISSN 1872-7603, Vol. 79, nr 1, s. 70-78Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    INTRODUCTION: Allergic women have been reported to give birth to more children than non-allergic women, speculatively explained by the former's predisposition for Th2 polarization, possibly favoring pregnancy.

    AIM: The aim of this study was to test the hypothesis that allergy is associated with more Th2-deviated responses to paternal antigens throughout pregnancy.

    METHODS: Blood samples were collected on six occasions during pregnancy and two occasions postpartum (pp). Of the 86 women initially included, 54 women had a normal pregnancy and completed the sampling procedures. Eleven women fulfilled the strict criteria for allergy (allergic symptoms and circulating IgE antibodies to inhalant allergens) and 23 were strictly non-allergic (non-sensitized without symptoms). The numbers of blood mononuclear cells secreting IFN-gamma and IL-4, spontaneously and in response to paternal alloantigens, were compared between the groups.

    RESULTS: The numbers of spontaneously as well as paternal antigen-induced IFN-gamma- and IL-4-secreting cells were similar in allergic and non-allergic pregnant women on all occasions. A similar increase in the numbers of both IFN-gamma- and IL-4-secreting cells were found in allergic and non-allergic women during pregnancy, both regarding spontaneous and paternal antigen-induced secretion.

    CONCLUSIONS: This study does not support the hypothesis of a more pronounced Th2-deviation to paternal antigens in allergic pregnant women compared with non-allergic pregnant women, as measured by number of cytokine-secreting cells. The observed increase of both IFN-gamma- and IL-4-secreting cells during normal pregnancy may be interpreted as a Th2-situation, since the effects of IL-4 predominate over the effects of IFN-gamma.

  • 91.
    Persson, Marie
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    Matthiesen, Leif
    Department of Obstetrics and Gynecology, Helsingborg Hospital, Helsingborg, Sweden.
    Sandberg, Martina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Jonsson, Yvonne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Reduced IFN-γ and IL-10 responses to paternal antigens during and after pregnancy in allergic women2012Ingår i: Journal of Reproductive Immunology, ISSN 0165-0378, E-ISSN 1872-7603, Vol. 95, nr 1-2, s. 50-58Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Normal pregnancy and allergy are both characterized by a T helper (Th) 2 deviation. In the current study, we hypothesized that paternal antigen-induced cytokine responses during pregnancy would be deviated toward Th2 and an anti-inflammatory profile, and that the Th2 deviation would be more pronounced in allergic pregnant women. Blood samples were collected longitudinally on three occasions during pregnancy and two occasions post partum (pp). Of the 86 women initially included, 54 women had a normal pregnancy and completed the sampling procedures. Twelve women fulfilled the criteria for allergy (allergic symptoms and circulating immunoglobulin [Ig] E antibodies to inhalant allergens) and 20 were non-allergic (nonsensitized without symptoms). The levels of Th1- and Th2-associated cytokines and chemokines, the Th17 cytokine IL-17 and the anti-inflammatory cytokine IL-10 of the groups were compared. Paternal antigen-induced IL-4 and IL-10 responses increased between the first and the third trimester. Allergy was associated with decreased paternal antigen-induced IFN-γ and CXCL10 secretion in the nonpregnant state (one year pp) and also decreased IFN-γ/IL-4 and IFN-γ/IL-13 ratios during pregnancy. We also observed a decreased paternal antigen-induced IL-10 response in allergic compared with non-allergic women during pregnancy, along with a decreased IL-10/IL-13 ratio. In conclusion, our findings support the hypothesis of lower Th1 responses toward paternal antigens in allergic than in non-allergic women, but also indicate that allergy is associated with a lower capacity to induce anti-inflammatory IL-10 responses after paternal antigen stimulation during pregnancy.

  • 92.
    Persson, Marie
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Jablonowska, Barbara
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet.
    Jonsson, Yvonne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Leukocyte populations in patients undergoing in vitro fertilization: responses to hormone treatment and relation to outcome2012Manuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    We aimed to prospectively investigate circulating leukocyte populations in infertile women undergoing IVF treatment and to determine whether any differences in cell proportions were associated with the IVF outcome. We also assessed the effect of IVF-based ovarian stimulation on the leukocyte populations. Twenty-five women were included and IVF treatment was successful in six and unsuccessful in 19 women. Blood samples were collected before IVF treatment, at the time of embryo transfer and four weeks after embryo transfer. The numbers and proportions of lymphocytes, T cells, NK cells, monocytes and granulocytes were analysed by flow cytometry, as well as the following lymphocyte subpopulations: CD3+HLA-DR+, CD4+CD45RA+, CD4+CD45R0+, CD8+CD45RA+, CD8+CD45R0+, CD4+CD25+, CD4dimCD25bright regulatory T cells, CD3-CD56bright and CD3-CD56dim NK cells. The proportions and numbers of leukocytes during IVF treatment were not related to the IVF outcome, although pregnant women (four weeks after ET) had a lower proportion of lymphocytes than the non-pregnant women. The absolute counts of lymphocytes, T cells, granulocytes and monocytes, as well as the proportions of granulocytes and T cells, increased at the time of ET, coinciding with high FSH and hCG levels. In conclusion, the proportions and numbers of leukocyte populations were not associated with the IVF outcome, although a larger study should be conducted to confirm this conclusion. Changes in both proportions and numbers of several leukocyte populations were observed during the course of IVF treatment, suggesting a stimulatory effect of the hormonal influence.

  • 93.
    Persson, Marie
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Jablonowska, Barbara
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet.
    Jonsson, Yvonne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Diagnostikcentrum, Klinisk immunologi och transfusionsmedicin.
    Jenmalm, Maria C.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Immunological status in patients undergoing in vitro fertilisation: responses to hormone treatment and relationship to outcome2012Ingår i: Journal of Reproductive Immunology, ISSN 0165-0378, E-ISSN 1872-7603, Vol. 96, nr 1-2, s. 58-67Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We aimed to prospectively investigate the paternal antigen-induced cytokine secretion by peripheral blood mononuclear cells (PBMCs) in response to hormone treatment in women undergoing in vitro fertilisation (IVF) and to examine the predictive value of the cytokine secretion profile in the outcome of IVF treatment, in a pilot study. Twenty-five women were included and IVF treatment was successful for six and unsuccessful for 19 women. Blood samples were collected before IVF treatment, on four occasions during IVF and four weeks after embryo transfer. The numbers of Th1-, Th2- and Th17-associated cytokine-secreting cells and cytokine levels in cell supernatants were analysed by enzyme-linked immunospot-forming (ELISpot), enzyme-linked immune-sorbent (ELISA) or Luminex assay. None of the cytokines (IFN-γ, IL-4, IL-5, IL-10, IL-12, IL-13, IL-17, TNF and GM-CSF) had any predictive value regarding IVF outcome. The majority of the cytokines reached their peak levels at ovum pick-up, suggesting an enhancing influence of the hormonal stimulation. Pregnancy was associated with a high number of IL-4-, IL-5- and IL-13-secreting cells four weeks after ET. In conclusion, the results do not support our hypothesis of a more pronounced peripheral Th1 and Th17 deviation towards paternal antigens in infertile women with an unsuccessful IVF outcome, although this is based on a small number of observations. A larger study is required to confirm this conclusion. Higher numbers of Th2-associated cytokine-secreting cells in pregnant women four weeks after ET do corroborate the hypothesis of a Th2 deviation during pregnancy.

  • 94. Prescott, SL
    et al.
    Holt, PG
    Jenmalm, Maria
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik.
    Björkstén, Bengt
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Effects of maternal allergen-specific IgG in cord blood on early postnatal development of allergen-specific T-cell immunity2000Ingår i: Allergy. European Journal of Allergy and Clinical Immunology, ISSN 0105-4538, E-ISSN 1398-9995, Vol. 55, nr 5, s. 470-475Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background: A wide body of epidemiologic evidence indicates that as yet unknown maternal factor(s) can influence susceptibility to allergic disease in the offspring. It is also well established that the induction of allergen- specific T-cell memory is frequently initiated in utero, and it is likely that maternal factors exert their influence during this period. Methods: This study examines the relationship between maternally derived allergen-specific IgG subclass antibodies and cellular immune responses (lymphoproliferation and cytokine production) against the same allergens in 49 subjects tested at birth and at 2 years of age. Polyclonal production of the Th1 cytokine IFN-? was also examined in the cord-blood samples. Results: At birth, there were positive correlations between both house-dust mite (HDM)- and ovalbumin (OVA)-specific IgG subclass levels in cord blood, maternal atopy, and the magnitude of perinatal lymphoproliferative responses to respective allergens. Inverse relationships were also observed between cord-blood IgG antibody titres and allergen-specific production of some Th2 cytokines. However, there were no consistent relationships between cord-blood allergen-specific IgG antibodies and subsequent immune responses to allergens when the same subjects were retested at 2 years of age. An inverse relationship was observed between maternal history of atopy and perinatal IFN-Ac production capacity. Conclusions: Our results suggest that transplacental transfer of allergen-specific IgG antibody is unlikely to be a major mechanism for maternal regulation of allergen-specific immunity in infancy. An alternative possibility is that maternal effects may operate by influencing IFN-? production by T cells in the offspring.

  • 95.
    Rodríguez, Juan Miguel
    et al.
    Department of Nutrition, Food Science and Food Technology, Complutense University of Madrid, Madrid, Spain.
    Murphy, Kiera
    Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland // Teagasc Moorepark Food Research Centre, Fermoy, Ireland.
    Stanton, Catherine
    Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland // Teagasc Moorepark Food Research Centre, Fermoy, Ireland.
    Ross, R Paul
    Alimentary Pharmabiotic Centre, University College Cork, Cork, Ireland // Teagasc Moorepark Food Research Centre, Fermoy, Ireland.
    Kober, Olivia I
    The Gut Health and Food Safety Institute Strategic Programme, Institute of Food Research, Norwich Research Park, Norwich, UK.
    Juge, Nathalie
    The Gut Health and Food Safety Institute Strategic Programme, Institute of Food Research, Norwich Research Park, Norwich, UK.
    Avershina, Ekaterina
    Department of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, Aas, Norway.
    Rudi, Knut
    Department of Chemistry, Biotechnology and Food Sciences, Norwegian University of Life Sciences, Aas, Norway.
    Narbad, Arjan
    The Gut Health and Food Safety Institute Strategic Programme, Institute of Food Research, Norwich Research Park, Norwich, UK.
    Jenmalm, Maria C
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten.
    Marchesi, Julian R
    School of Biosciences, Cardiff University, Cardiff, UK // Centre for Digestive and Gut Health, Imperial College London, London, UK.
    Collado, Maria Carmen
    Department of Biotechnology, Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Valencia, Spain.
    The composition of the gut microbiota throughout life, with an emphasis on early life2015Ingår i: Microbiological Ecology in Health and Disease, ISSN 0891-060X, E-ISSN 1651-2235, Vol. 26, artikel-id 26050Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    The intestinal microbiota has become a relevant aspect of human health. Microbial colonization runs in parallel with immune system maturation and plays a role in intestinal physiology and regulation. Increasing evidence on early microbial contact suggest that human intestinal microbiota is seeded before birth. Maternal microbiota forms the first microbial inoculum, and from birth, the microbial diversity increases and converges toward an adult-like microbiota by the end of the first 3-5 years of life. Perinatal factors such as mode of delivery, diet, genetics, and intestinal mucin glycosylation all contribute to influence microbial colonization. Once established, the composition of the gut microbiota is relatively stable throughout adult life, but can be altered as a result of bacterial infections, antibiotic treatment, lifestyle, surgical, and a long-term change in diet. Shifts in this complex microbial system have been reported to increase the risk of disease. Therefore, an adequate establishment of microbiota and its maintenance throughout life would reduce the risk of disease in early and late life. This review discusses recent studies on the early colonization and factors influencing this process which impact on health.

  • 96. Rytkonen, J
    et al.
    Karttunen, TJ
    Karttunen, R
    Valkonen, KH
    Jenmalm, Maria
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik.
    Alatossava, T
    Björkstén, B
    Kokkonen, J
    Effect of heat denaturation on beta-lactoglobulin-induced gastrointestinal sensitization in rats: denatured betaLG induces a more intensive local immunologic response than native betaLG2002Ingår i: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 13, nr 4, s. 269-277Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Beta-lactoglobulin (▀LG) is one of the first foreign antigens encountered by a newborn child, and it is the major allergen causing cow's milk allergy. Heat denaturation causes changes to the protein structure, but the significance of heat-induced changes for immunogenicity or allergenicity is not known. To clarify how heat denaturation affects allergenicity and immunogenicity, we immunized Hooded-Lister rat pups with intra-peritoneal injections of native or heat-denatured ▀LG at days 43 and 62 after birth. The animals were then fed native and denatured milk products twice weekly from 73 to 101 days of age with a feeding tube, after which they were allowed cheese and milk ad libitum, until they were killed on day 131. Total immunoglobulin (Ig)E and ▀LG-specific IgG1 and IgG2a levels were determined from serum samples. Spontaneous interleukin-4 (IL-4) and interferon-? (IFN-?) production was measured from duodenal specimens, and specimens of gastrointestinal mucosae were studied for the presence of inflammatory cells. The rats immunized with native ▀LG had higher levels of total serum IgE than the unimmunized controls or the rats immunized with heat-denatured ▀LG, while heat-denatured ▀LG induced a significantly more intensive mononuclear inflammatory cell and eosinophil infiltration in the gastroduodenal mucosa. The ▀LG -specific IgG antibody and IL-4 and IFN-? responses were similar in the two groups of immunized animals. Hence, denaturation modifies the immunogenic and allergenic properties of ▀LG. Heat-denatured ▀LG induces a more intensive local reaction in the gastrointestinal mucosa, while there is some evidence for enhanced systemic allergic sensitization by native ▀LG. ⌐ 2002 Blackwell Munksgaard.

  • 97.
    Sandberg, Martina
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Matthiesen, L
    Helsingborg Hospital.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Nilsson, L J
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Allergicentrum. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Systemic Th1-and Th2-associated chemokines during and after pregnancy in relation to maternal allergic disease2009Ingår i: in JOURNAL OF REPRODUCTIVE IMMUNOLOGY, vol 81, issue 2, 2009, Vol. 81, nr 2, s. 164-164Konferensbidrag (Refereegranskat)
    Abstract [en]

    n/a

  • 98.
    Sandberg, Martina
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Frykman, Anne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Matthiesen, Leif
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Nilsson, Lennart
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Hjärt- och Medicincentrum, Allergicentrum US.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Cord blood cytokines and chemokines and development of allergic disease2009Ingår i: PEDIATRIC ALLERGY AND IMMUNOLOGY, ISSN 0905-6157, Vol. 20, nr 6, s. 519-527Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Exposure to ubiquitous allergens early in life, even before birth, may influence the incidence of allergic diseases later in life. During pregnancy, the fetomaternal interface is surrounded by high levels of T-helper (Th)2-like cytokines, possibly favouring the development of Th2-like immune responses in the offspring. The aim of this study was to evaluate the relation between cord blood (CB) IgE antibodies, Th1- and Th2-like cytokines and chemokines, maternal allergy and development of allergic disease during the first 2 yr of life in the offspring. The CB cytokine and chemokine levels from children of 20 allergic and 36 non-allergic women were determined by a multiplexed Luminex assay and ELISA. Total CB and maternal IgE antibody concentrations were quantified using ImmunoCAP technology. The maternal IgE levels during and after pregnancy correlated with CB IgE and Th2-associated macrophage-derived chemokine [MDC (CCL22)] levels. Development of allergic disease and sensitization was associated with increased CB IgE and MDC (CCL22) levels, as well as high ratios of MDC (CCL22) to Th1-associated interferon-gamma inducible protein 10 [IP-10 (CXCL10)] and interferon-gamma inducible T-cell alpha-chemoattractant [I-TAC (CXCL11) (n = 7 allergic vs. n = 25 non-allergic)]. The correlations between maternal IgE and CB IgE and MDC (CCL22) levels possibly indicate that the maternal immunity can affect the Th1/Th2 profile in the neonate. Development of allergic disease is associated with a more marked Th2-like deviation already at birth, shown as increased levels of CB IgE and MDC (CCL22) and higher ratios of MDC (CCL22) to IP-10 (CXCL10) and I-TAC (CXCL11).

  • 99.
    Sandberg, Martina
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Frykman, Anne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Jonsson, Yvonne
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Persson, Marie
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Ernerudh, Jan
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Laboratoriemedicinskt centrum, Klinisk immunologi och transfusionsmedicin.
    Berg, Göran
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Matthiesen, Leif
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Obstetrik och gynekologi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Kvinnokliniken i Linköping.
    Ekerfelt, Christina
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Klinisk immunologi. Linköpings universitet, Hälsouniversitetet.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Total and allergen-specific IgE levels during and after pregnancy in relation to maternal allergy2009Ingår i: JOURNAL OF REPRODUCTIVE IMMUNOLOGY, ISSN 0165-0378, Vol. 81, nr 1, s. 82-88Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Type 2 T-helper cell (Th2)-skewed immunity is associated with successful pregnancy and the ability to easily direct immune responses to a Th2-polarised profile may be an evolutionary benefit. The Th2-like immunity associated with allergic disease might generate favourable effects for the maintenance of pregnancy, but could also promote development of Th2-like immune responses and allergic disease in the offspring. The aim of this study was to explore, by using IgE as a stable proxy for Th2, the Th1/Th2 balance in allergic and non-allergic women by measuring allergen-specific and total IgE antibody levels in plasma during pregnancy and after delivery. Specific and total IgE antibody levels were determined by ImmunoCAP technology at five occasions during pregnancy (gestational weeks 10-12, 15-16, 25, 35 and 39), as well as at 2 and 12 months after delivery. Thirty-six women without and 20 women with allergic symptoms were included, of whom 13 were sensitised with allergic symptoms and 30 were non-sensitised without allergic symptoms. The levels of total IgE, but not allergen-specific IgE, were increased during early pregnancy when compared to 12 months after delivery in the sensitised women with allergic symptoms, but not in the non-sensitised women without allergic symptoms (pandlt;0.01). This increase in total IgE levels during early pregnancy only in the sensitised women with allergic symptoms indicates that allergy is associated with an enhanced Th2 deviation during pregnancy.

  • 100.
    Sandin, Anna
    et al.
    Umea University.
    Bjorksten, Bengt
    Karolinska Institute.
    Fagerås Böttcher, Malin
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Englund, Erling
    County Council Vasternorrland.
    Jenmalm, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Pediatrik. Linköpings universitet, Hälsouniversitetet.
    Braback, Lennart
    Umea University.
    High salivary secretory IgA antibody levels are associated with less late-onset wheezing in IgE-sensitized infants2011Ingår i: Pediatric Allergy and Immunology, ISSN 0905-6157, E-ISSN 1399-3038, Vol. 22, nr 5, s. 477-481Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Low levels of secretory IgA (SIgA) and transient IgA deficiency have been associated with an increased risk for allergy, but data are conflicting. The aim was to assess the relationship between salivary SIgA antibody levels at 1 yr and wheezing at age four in a birth cohort, in particular the possible protective role of salivary SIgA in sensitized children. Saliva samples were obtained from all children (n = 67) with a positive skin prick test (SPT) at 1 yr and 212 children with a negative SPT. In all, 200 of these children responded to questionnaires at 4 yrs and 183 were skin prick tested at that age. The levels of salivary SIgA and salivary IgA antibodies to the most common food allergen egg and inhalant allergen cat were analyzed by ELISA. Serum was analyzed for IgE antibodies to egg and cat. Development of late-onset wheezing was associated with low SIgA levels in children with positive SPT to at least one allergen both at 1 and 4 yrs of age (p = 0.04), as well as in children with circulating IgE antibodies to egg or cat at 1 yr (p = 0.02). None of nine persistently sensitized children with SIgA levels in the upper quartile developed wheezing, when compared to 10/20 children with lower levels (p = 0.01). Older siblings, more than three infections during infancy, at least one smoking parent, and male gender, were all associated with SIgA in the upper quartile. In conclusion, high levels of SIgA antibodies in sensitized infants were associated with significantly less late-onset wheezing, supporting a protective role against development of asthmatic symptoms. Recurrent infections and other factors supporting an increased microbial pressure during infancy were associated with high levels of salivary SIgA.

123 51 - 100 av 121
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf