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  • 1.
    Bentow, C.
    et al.
    Inova Diagnost, CA USA.
    Lakos, G.
    Inova Diagnost, CA USA.
    Martis, P.
    Inova Diagnost, CA USA.
    Wahl, E.
    Inova Diagnost, CA USA.
    Garcia, M.
    Hospital Clin Barcelona, Spain.
    Vinas, O.
    Hospital Clin Barcelona, Spain.
    Espinosa, G.
    Hospital Clin Barcelona, Spain.
    Cervera, R.
    Hospital Clin Barcelona, Spain.
    Sjöwall, Christopher
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Hjärt- och Medicincentrum, Reumatologiska kliniken i Östergötland.
    Carmona-Fernandes, D.
    University of Lisbon, Portugal.
    Santos, M. J.
    University of Lisbon, Portugal.
    Hanly, J. G.
    Dalhousie University, Canada.
    Mahler, M.
    Inova Diagnost, CA USA.
    International multi-center evaluation of a novel chemiluminescence assay for the detection of anti-dsDNA antibodies2016Inngår i: Lupus, ISSN 0961-2033, E-ISSN 1477-0962, Vol. 25, nr 8, s. 864-872Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Objective: Anti-double stranded desoxyribonucleic acid (anti-dsDNA) antibodies are considered fairly specific for systemic lupus erythematosus (SLE) and their quantification is useful for the clinical management of SLE patients. We assessed the diagnostic performance of the QUANTA Flash dsDNA chemiluminescent immunoassay (CIA) in comparison to an ELISA, using patients from five participating countries. The main focus was to evaluate the correlation between anti-dsDNA antibody results from the CIA and global SLE disease activity, as measured by the SLE Disease Activity Index 2000 (SLEDAI-2K). Patients and methods: A total of 1431 samples (SLE, n=843; disease controls, n=588) from five countries (Canada, USA, Portugal, Sweden and Spain) were tested with QUANTA Flash dsDNA (Inova Diagnostics, San Diego, CA, USA). Data obtained with the QUANTA Lite dsDNA SC ELISA (Inova Diagnostics) were available for samples from three sites (Canada, USA and Sweden, n=566). The SLEDAI-2K scores were available for 805 SLE patients and a cut-off ofamp;gt;4 was used to define active disease. Results: QUANTA Flash dsDNA had a sensitivity of 54.3% for the diagnosis of SLE, combined with 89.8% specificity. Anti-dsDNA antibody levels were significantly higher (pamp;lt;0.0001) in active SLE (SLEDAI-2Kamp;gt;4; n=232; median value 83.0IU/mL) versus the inactive patients (n=573; median value 22.3IU/mL), and the SLEDAI-2K scoring correlated with their dsDNA antibody levels (Spearmans rho=0.44, pamp;lt;0.0001). Similar but less pronounced findings were also found for the ELISA, in relation to disease activity. Conclusions: The QUANTA Flash dsDNA assay showed good clinical performance in a large international multi-center study. Additionally, the strong correlation between anti-dsDNA antibody results and SLEDAI-2K scores supported the potential utility of QUANTA Flash dsDNA for monitoring disease activity.

  • 2. Brodszki, J
    et al.
    Bengtsson, C
    Länne, Toste
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för medicin och vård. Östergötlands Läns Landsting, Hjärtcentrum, Thorax-kärlkliniken.
    Nived, O
    Sturfelt, G
    Marsal, K
    Abnormal mechanical properties of larger arteries in postmenopausal women with systemic lupus erythematosus2004Inngår i: Lupus, ISSN 0961-2033, E-ISSN 1477-0962, Vol. 13, nr 12, s. 917-923Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    There is limited knowledge of potential defects in arterial wall properties in female systemic lupus erythematosus (SLE) patients without manifest cardiovascular disease (CVD) and significant atherosclerotic lesions. The aim of the present study was to investigate the mechanical properties of larger vessels in these patients and to compare them with healthy controls. B-mode ultrasound was used to assess vessel wall structure and to exclude presence of plaque. The ankle/brachial pressure index was measured to exclude occlusive arterial disease. An ultrasound echo-tracking system was used to determine stiffness of the abdominal aorta, common carotid artery (CCA) and popliteal artery (PA) in 39 female patients with SLE and 55 female, healthy controls. SLE had an independent effect on stiffening of the CCA (P = 0.01) and PA (P = 0.005). In addition, larger vessel diameters were observed in the CCA (P = 0.002) after adjustments for the effects of mean arterial pressure and age. Thus, this investigation demonstrated an increased arterial stiffness and signs of premature vascular ageing in the SLE patients without manifest cardiovascular disease and without significant atherosclerotic lesions. The results of this study indicate that other mechanisms besides atherosclerosis might be involved in the pathogenesis of arterial stiffening in SLE patients.

  • 3.
    Dahlström, Örjan
    et al.
    Linköpings universitet, Institutionen för beteendevetenskap och lärande, Psykologi. Linköpings universitet, Filosofiska fakulteten. Linköpings universitet, Institutet för handikappvetenskap (IHV).
    Sjöwall, Christopher
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Hjärt- och Medicincentrum, Reumatologiska kliniken i Östergötland.
    The diagnostic accuracies of the 2012 SLICC criteria and the proposed EULAR/ACR criteria for systemic lupus erythematosus classification are comparable2019Inngår i: Lupus, ISSN 0961-2033, E-ISSN 1477-0962, Vol. 28, nr 6, s. 778-782Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In a joint effort, the European League Against Rheumatism (EULAR) and the American College of Rheumatology (ACR) recently proposed new criteria for the classification of systemic lupus erythematosus (SLE) with the overarching goal to identify potential participants for clinical studies. Herein, we present the first independent evaluation of these criteria in comparison with older classification grounds using an adult Scandinavian study population of confirmed SLE cases and individuals with SLE-mimicking conditions. We included 56 confirmed SLE cases meeting the 1982 ACR criteria (ACR-82) and/or the Fries diagnostic principle (antinuclear antibodies on at least one occasion plus involvement of at least two defined organ systems) and 55 controls with possible systemic autoimmune disease, including the presence of any SLE-related autoantibody. The proposed EULAR/ACR criteria showed a diagnostic sensitivity of 93% (95% confidence interval (CI), 0.83-0.98) compared with 83% (95% CI, 0.72-0.91) for the updated ACR criteria from 1997. The diagnostic accuracy of all tested classification grounds was fairly similar, achieving approximately 85%. However, the disease specificity of the EULAR/ACR criteria reached only 73% (95% CI, 0.59-0.83), which was comparable with the 2012 Systemic Lupus International Collaborating Clinics (SLICC) criteria, 75% (95% CI, 0.61-0.85), but clearly lower than for ACR-82, 94% (95% CI, 0.83-0.99). In this first independent evaluation of a limited number of cases, we found comparable results with respect to diagnostic sensitivity, specificity and accuracy regarding the SLICC-12 and the proposed EULAR/ACR classification criteria. However, their specificity for SLE appeared to be lower compared with ACR-82.

  • 4.
    Frodlund, Martina
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Hjärt- och Medicincentrum, Reumatologiska kliniken i Östergötland.
    Reid, S.
    Uppsala Univ, Sweden.
    Wetterö, Jonas
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten.
    Dahlström, Örjan
    Linköpings universitet, Institutionen för beteendevetenskap och lärande, Psykologi. Linköpings universitet, Filosofiska fakulteten. Linköpings universitet, Institutet för handikappvetenskap (IHV).
    Sjöwall, Christopher
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Hjärt- och Medicincentrum, Reumatologiska kliniken i Östergötland.
    Leonard, D.
    Uppsala Univ, Sweden.
    The majority of Swedish systemic lupus erythematosus patients are still affected by irreversible organ impairment: factors related to damage accrual in two regional cohorts2019Inngår i: Lupus, ISSN 0961-2033, E-ISSN 1477-0962, artikkel-id UNSP 0961203319860198Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Background Although the survival of patients with systemic lupus erythematosus (SLE) has improved, irreversible organ damage remains a critical concern. We aimed to characterize damage accrual and its clinical associations and causes of death in Swedish patients. Methods Accumulation of damage was evaluated in 543 consecutively recruited and well-characterized cases during 1998-2017. The Systemic Lupus International Collaborating Clinics (SLICC)/American College of Rheumatology damage index (SDI) was used to estimate damage. Results Organ damage (SDI amp;gt;= 1) was observed in 59%, and extensive damage (SDI amp;gt;= 3) in 25% of cases. SDI amp;gt;= 1 was significantly associated with higher age at onset, SLE duration, the number of fulfilled SLICC criteria, neurologic disorder, antiphospholipid antibody syndrome (APS), hypertension, hyperlipidemia, depression and secondary Sjogrens syndrome (SS). In addition, SDI amp;gt;= 3 was associated with serositis, renal and haematological disorders and interstitial lung disease. A multiple regression model identified not only well-known risk factors like APS, antihypertensives and corticosteroids, but pericarditis, haemolytic anaemia, lymphopenia and myositis as being linked to SDI. Malignancy, infection and cardiovascular disease were the leading causes of death. Conclusions After a mean SLE duration of 17 years, the majority of todays Swedish SLE patients have accrued damage. We confirm previous observations and report some novel findings regarding disease phenotypes and damage accrual.

  • 5. Puurunen, M
    et al.
    Palosuo, T
    Lassila, R
    Anttila, M
    Vaarala, Outi
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för molekylär och klinisk medicin, Pediatrik. Östergötlands Läns Landsting, Barn- och kvinnocentrum, Barn.
    Immunologic and hematologic properties of antiabodies to prothrombin and plasminogen in a mouse model.2001Inngår i: Lupus, ISSN 0961-2033, E-ISSN 1477-0962, Vol. 10, s. 108-115Artikkel i tidsskrift (Fagfellevurdert)
  • 6.
    Sjöwall, Christopher
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Hjärt- och Medicincentrum, Reumatologiska kliniken i Östergötland.
    Hjorth, Maria
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten.
    Eriksson, Per
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Region Östergötland, Hjärt- och Medicincentrum, Reumatologiska kliniken i Östergötland. Linköpings universitet, Medicinska fakulteten.
    Successful treatment of refractory systemic lupus erythematosus using proteasome inhibitor bortezomib followed by belimumab: description of two cases2017Inngår i: Lupus, ISSN 0961-2033, E-ISSN 1477-0962, Vol. 26, nr 12, s. 1333-1338Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Although the putative therapeutic options for patients with systemic lupus erythematosus (SLE) are steadily increasing, refractory disease is indeed a major challenge to many clinicians and patients. The proteasome inhibitor bortezomib - approved for the treatment of multiple myeloma since the beginning of this century - was recently reported successful in twelve cases of refractory SLE by German colleagues. Herein, we describe two Swedish SLE cases with refractory renal and pulmonary manifestations that were rescued by bortezomib as induction of remission followed by monthly doses of belimumab. The patients were carefully monitored with regard to disease activity and renal function. Anti-dsDNA and anti-C1q antibodies, complement proteins and lymphocyte subsets were analysed in consecutive samples. In December 2016, the patients had been in clinical remission post bortezomib administration for a period of 28 and 22 months, respectively. Potential benefits of using belimumab as maintenance therapy to prevent regeneration of autoreactive B cell clones are discussed.

  • 7.
    Sjöwall, Christopher
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Hjärt- och Medicincentrum, Reumatologiska kliniken i Östergötland.
    Zapf, J
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany.
    von Löhneysen, S
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för neuro- och inflammationsvetenskap. Linköpings universitet, Medicinska fakulteten. Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany.
    Magorivska, I
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany; Institute of Cell Biology, National Academy of Sciences of Ukraine, Lviv, Ukraine.
    Biermann, M
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany.
    Janko, C
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany; University Hospital Erlangen, Germany.
    Winkler, S
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany.
    Bilyy, R
    Institute of Cell Biology, National Academy of Sciences of Ukraine, Lviv, Ukraine.
    Schett, G
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany.
    Herrmann, M
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany.
    Muñoz, L E
    Friedrich-Alexander University of Erlangen-Nuremberg (FAU), Germany.
    Altered glycosylation of complexed native IgG molecules is associated with disease activity of systemic lupus erythematosus2015Inngår i: Lupus, ISSN 0961-2033, E-ISSN 1477-0962, Vol. 24, nr 6, s. 569-581Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In addition to the redundancy of the receptors for the Fc portion of immunoglobulins, glycans result in potential ligands for a plethora of lectin receptors found in immune effector cells. Here we analysed the exposure of glycans containing fucosyl residues and the fucosylated tri-mannose N-type core by complexed native IgG in longitudinal serum samples of well-characterized patients with systemic lupus erythematosus. Consecutive serum samples of a cohort of 15 patients with systemic lupus erythematosus during periods of increased disease activity and remission were analysed. All patients fulfilled the 1982 American College of Rheumatology classification criteria. Sera of 15 sex- and age-matched normal healthy blood donors served as controls. The levels and type of glycosylation of complexed random IgG was measured with lectin enzyme-immunosorbent assays. After specifically gathering IgG complexes from sera, biotinylated lectins Aleuria aurantia lectin and Lens culinaris agglutinin were employed to detect IgG-associated fucosyl residues and the fucosylated tri-mannose N-glycan core, respectively. In sandwich-ELISAs, IgG-associated IgM, IgA, C1q, C3c and C-reactive protein (CRP) were detected as candidates for IgG immune complex constituents. We studied associations of the glycan of complexed IgG and disease activity according to the physician's global assessment of disease activity and the systemic lupus erythematosus disease activity index 2000 documented at the moment of blood taking. Our results showed significantly higher levels of Aleuria aurantia lectin and Lens culinaris agglutinin binding sites exposed on IgG complexes of patients with systemic lupus erythematosus than on those of normal healthy blood donors. Disease activity in systemic lupus erythematosus correlated with higher exposure of Aleuria aurantia lectin-reactive fucosyl residues by immobilized IgG complexes. Top levels of Aleuria aurantia lectin-reactivity were found in samples taken during the highest activity of systemic lupus erythematosus. Our results show that native circulating IgG complexes from active systemic lupus erythematosus patients expose fucosyl residues and their glycan core is accessible to soluble lectins. Two putative mechanisms may contribute to the increased exposure of these glycans: (1) the canonical N-glycosylation site of the IgG-CH2 domain; (2) an IgG binding non-IgG molecule, like complement or C-reactive protein. In both cases the complexed IgG may be alternatively targeted to lectin receptors of effector cells, e.g. dendritic cells.

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