liu.seSearch for publications in DiVA
Endre søk
Begrens søket
1 - 31 of 31
RefereraExporteraLink til resultatlisten
Permanent link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Treff pr side
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
  • Standard (Relevans)
  • Forfatter A-Ø
  • Forfatter Ø-A
  • Tittel A-Ø
  • Tittel Ø-A
  • Type publikasjon A-Ø
  • Type publikasjon Ø-A
  • Eldste først
  • Nyeste først
  • Skapad (Eldste først)
  • Skapad (Nyeste først)
  • Senast uppdaterad (Eldste først)
  • Senast uppdaterad (Nyeste først)
  • Disputationsdatum (tidligste først)
  • Disputationsdatum (siste først)
Merk
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1.
    Danielsson, Pär
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Kirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Fredriksson, Camilla
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet.
    Huss, Fredrik
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    A Novel Concept for Treating Large Necrotizing Fasciitis Wounds With Bilayer Dermal Matrix, Split-thickness Skin Grafts, and Negative Pressure Wound Therapy2009Inngår i: Wounds (King of Prussia, Pa.), ISSN 1044-7946, E-ISSN 1943-2704, Vol. 21, nr 8, s. 215-220Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Treatment of necrotizing fasciitis (NF) includes radical surgical debridement often resulting in large wounds that need to be closed with methods including split-thickness skin grafts (STSG), local flaps, or guided tissue regeneration procedures. In this case report, a 45 year-old Caucasian male was surgically treated for a benign left groin hernia, developed NF, and was transferred to the authors burn unit. The wound was treated initially with wide debridement and with a brief delay before finally closing the wound. A collagen matrix such as Integra (R) Dermal Regeneration Template (Integra LifeSciences, Plainsboro, NJ) in combination with STSG and negative pressure wound treatment, can provide fast recovery resulting in pliable, functional skin.

  • 2. Erlandsson, Ulf
    et al.
    Huss, Fredrik
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Brännande aktuellt i juletid. Äldre personer är överrepresenterade i bränder med levande ljus2005Inngår i: Läkartidningen, ISSN 0023-7205, E-ISSN 1652-7518, Vol. 102, nr 50-52, s. 3897-3898Artikkel i tidsskrift (Annet vitenskapelig)
  • 3.
    Fredriksson, Camilla
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Berzelius Clinical Research Center, Berzelius Science Park, Linköping, Sweden.
    Hedhammar, My
    Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, the Biomedical Centre, Uppsala, Sweden.
    Feinstein, Ricardo
    National Veterinary Institute, Uppsala, Sweden.
    Nordling, Kerstin
    Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, the Biomedical Centre, Uppsala, Sweden.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken med brännskadeenheten.
    Johansson, Jan
    Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, the Biomedical Centre, Uppsala, Sweden.
    Huss, Fredrik
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken med brännskadeenheten.
    Rising, Anna
    Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, the Biomedical Centre, Uppsala, Sweden.
    Tissue Response to Subcutaneously Implanted Recombinant Spider Silk: An in Vivo Study2009Inngår i: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 2, nr 4, s. 1908-1922Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Spider silk is an interesting biomaterial for medical applications. Recently, a method for production of recombinant spider silk protein (4RepCT) that forms macroscopic fibres in physiological solution was developed. Herein, 4RepCT and Mersilk(TM) (control) fibres were implanted subcutaneously in rats for seven days, without any negative systemic or local reactions. The tissue response, characterised by infiltration of macrophages and multinucleated cells, was similar with both fibres, while only the 4RepCT-fibres supported ingrowth of fibroblasts and newly formed capillaries. This in vivo study indicates that 4RepCT-fibres are well tolerated and could be used for medical applications, e. g., tissue engineering.

  • 4.
    Fredriksson, Camilla
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Huss, Fredrik
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Accumulation of Silver and Delayed Re-epithelialization in Normal Human Skin: An ex-vivo Study of Different Silver Dressings2009Inngår i: WOUNDS-A COMPENDIUM OF CLINICAL RESEARCH AND PRACTICE, ISSN 1044-7946, Vol. 21, nr 5, s. 116-123Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Silver is commonly used in wound dressings and topical formulations to assist in the management of wounds that are infected or at risk of becoming infected. They provide potent broad-spectrum antimicrobial activity, but should not cause sustained staining of the skin, dermal or systemic accumulation of silver, or discomfort to the patient. However, clinicians and healthcare personnel have been concerned about topical staining of the skin and complaints of additional pain from patients treated with certain silver dressings. Some delay in re-epithelialization has also been noticed and reported. The reasons for this are not clear, and the authors believed further study regarding the possible effects of silver accumulation and silver dressings effect on re-epithelialization was required. The authors studied possible silver accumulation and re-epithelialization in normal human dermal skin. The results showed that most of the dressings or treatments discolored the wound surface and that there was a dermal accumulation of what were assumed to be silver particles. Varying grades of accumulation were found in deep dermal tissue, particularly around blood vessels, depending on the dressing used. The results also indicated that all of the tested products delayed re-epithelialization in this model.

  • 5.
    Fredriksson, Camilla
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Huss, Fredrik
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Transplantation of cultured human keratinocytes in single cell suspension: a comparative in vitro study of different application techniques2008Inngår i: Burns, ISSN 0305-4179, E-ISSN 1879-1409, Vol. 34, nr 2, s. 212-219Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Transplantation of autologous cultured keratinocytes in single cell suspension is useful in the treatment of burns. The reduced time needed for culture, and the fact that keratinocytes in suspension can be transported from the laboratory to the patient in small vials, thus reducing the costs involved and be stored (frozen) in the clinic for transplantation when the wound surfaces are ready, makes it appealing. We found few published data in the literature about actual cell survival after transplantation of keratinocytes in single cell suspension and so did a comparative in vitro study, considering commonly used application techniques. Human primary keratinocytes were transplanted in vitro in a standard manner using different techniques. Keratinocytes were counted before and after transplantation, were subsequently allowed to proliferate, and counted again on days 4, 8, and 14 by vital staining. Cell survival varied, ranging from 47% to >90%, depending on the technique. However, the proliferation assays showed that the differences in numbers diminished after 8 days of culture. Our findings indicate that a great number of cells die during transplantation but that this effect is diminished if cells are allowed to proliferate in an optimal milieu. A burned patient’s wounds cannot be regarded as the optimal milieu, and using less harsh methods of transplantation may increase the take rate and wound closing properties of autologous keratinocytes transplanted in a single cell suspension.

  • 6.
    Garvin, Stina
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet.
    Nilsson, Ulrika W.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet.
    Huss, Fredrik R. M.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet.
    Dabrosin, Charlotta
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Onkologi. Linköpings universitet, Hälsouniversitetet.
    Estradiol increases VEGF in normal human breast studied by whole-tissue culture2006Inngår i: Cell Tissue Research, ISSN 0302-766X, Vol. 325, nr 2, s. 245-251Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Sex steroid exposure constitutes a risk factor for breast cancer, but little is known about the effects of sex steroids on the normal breast, largely because of the lack of convenient models. We have developed a method of culturing normal breast tissue ex vivo. We have applied this method to investigate the effects of estradiol and progesterone on the key angiogenic mediator, vascular endothelial growth factor (VEGF), in the breast. Whole breast tissue was obtained from routine reduction mammoplasty. Tissue biopsies were cultured in vitro for 1–3 weeks, and the expression of luminal cytokeratin 18 was determined by immunohistochemistry. As an application, tissue biopsies were treated in vitro for 1 week with or without estradiol or estradiol and progesterone. Estrogen receptor, progesterone receptor, and Ki–67 were analyzed, and VEGF levels were examined by quantitative immunoassay and immunohistochemistry. Whole breast tissue was cultured ex vivo for 1 week with preserved morphology. Increased detachment of the luminal epithelium was observed after 2 weeks. Estradiol increased extracellular levels of VEGF in normal breast tissue biopsy medium. The addition of progesterone had neither stimulatory nor inhibitory effects on secreted VEGF. The method of whole breast tissue culturing thus provide a means by which to explore the biology of normal breast tissue. Our results suggest that estradiol exerts pro-angiogenic effects in normal breast by increasing levels of biologically active VEGF.

  • 7. Gustafson, Carl-Johan
    et al.
    Birgisson, Agust
    Junker, Johan
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Hand och plastikkirurgi.
    Huss, Fredrik
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Salemark, Lars
    Johnson, Hans
    Kratz, Gunnar
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Employing human keratinocytes cultured on macroporous gelatin spheres to treat full thickness-wounds: An in vivo study on athymic rats2007Inngår i: Burns, ISSN 0305-4179, E-ISSN 1879-1409, Vol. 33, nr 6, s. 726-735Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Providing cutaneous wounds with sufficient epidermis to prevent infections and fluid loss is one of the most challenging tasks associated with surgical treatment of burns. Recently, application of cultured keratinocytes in this context has allowed this challenge to be met without several of the limitations connected with the use of split-thickness skin grafts. The continuous development of this novel approach has now revealed that transplantation of cultured autologous keratinocytes as single-cell suspensions exhibits several advantages over the use of cultured epidermal grafts. However, a number of methodological problems remain to be solved, primarily with regards to the complexity of culturing these cells, loss of viability and other negative effects during their preparation and transportation, the relatively long period of time required following transplantation to obtain a sufficiently protective epidermis. In the present investigation we attempted to eliminate these limitations by culturing the keratinocytes on macroporous gelatin spheres. Accordingly, the efficacies of normal human keratinocytes in single-cell suspension or growing on macroporous gelatin spheres, as well as of split-thickness skin grafts in healing wounds on athymic rats were compared. Human keratinocytes were found to adhere and proliferate efficiently both on the surface and within the pores of such spheres. Transplantation of such cells adherent to the spheres resulted in significantly more rapid formation of a stratified epidermis than did transplantation of single-cell suspensions or spheres alone. Twenty-three days after transplantation, the epidermis formed from the cells bound to the spheres was not as thick as the epidermis on wounds covered with split-thickness skin grafts, but significantly thicker than on wounds to which single-cell suspensions, spheres alone or no transplant at all was applied. Furthermore, fluorescence in situ hybridisation revealed that the transplanted keratinocytes, both those adherent to gelatin spheres and those in single-cell suspension, were components of the newly formed epidermis. These findings indicate that application of biodegradable macroporous spheres may prove to be of considerable value in designing cell-based therapies for the treatment of acute and persistent wounds. © 2006 Elsevier Ltd and ISBI.

  • 8.
    Huss, Fredrik
    Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Hälsouniversitetet.
    Brännskador2010Inngår i: Akut pediatrik / [ed] Nordgren S LJ, Norman M, Stockholm: Liber , 2010, 8Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [sv]

    Akut pediatrik är en klassiker i den svenska medicinska litteraturen, och en första handbok för läkare och sjuksköterskor i deras arbete med sjuka barn och ungdomar. Boken är helt inriktad på de omedelbara och ofta livräddande åtgärder som krävs vid allvarliga akuta sjukdomstillstånd och olyckor.Läs merDenna sjunde upplaga av Akut pediatrik har kompletterats med flera nya kapitel, bland annat ett introduktionsavsnitt om det akut svårt sjuka barnet. Alla kapitel är reviderade med målgruppen i åtanke - primärjour - och med fokus på handläggning under det första dygnet. Boken har många nya faktarutor och algoritmer som ger precisa instruktioner för respektive tillstånd.Om författarnaAkut pediatrik är skriven av vårt lands främsta specialister under redaktion av Svante Norgren, Jonas F. Ludvigsson och Mikael Norman.RecensionerGenom sin moderna layout, rikligt med flödesscheman, tabeller, faktarutor samt överskådlig innehållsförteckning och täckande register fungerar den utmärkt som uppslagsbok./.../Boken ger riklig och adekvat information till sin målgrupp.

  • 9.
    Huss, Fredrik
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Erlandsson, Ulf
    Cooray, Vernon
    Kratz, Gunnar
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Sjöberg, Folke
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Blixtolyckor - mix av elektriskt, termiskt och multipelt trauma2004Inngår i: Läkartidningen, ISSN 0023-7205, E-ISSN 1652-7518, Vol. 101, s. 2328-2331Artikkel i tidsskrift (Annet vitenskapelig)
  • 10.
    Huss, Fredrik
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Erlandsson, Ulf
    Sjöberg, Folke
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Buses as fire hazards: A Swedish problem only? Suggestions for fire-prevention measures2004Inngår i: Journal of Burn Care and Rehabilitation, ISSN 0273-8481, E-ISSN 1534-5939, Vol. 25, nr 4, s. 377-380Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In Sweden, approximately 6% of all human transportation is made via buses. The Swedish Board of Accident Investigation and the Swedish Rescue Services Agency have pointed out repeatedly that buses are potential fire and burn hazards, not only when involved in collisions but also in other circumstances. The number of fire incidents is increasing, especially in newer buses. In conjunction with the Swedish Rescue Services Agency, we examined some of the recent bus fires in Sweden. We did not find any casualties, but the results of our study suggest that casualties as a result of bus fires are imminent unless preventive measures are taken. We also studied experiences from previous bus fires and suggest preventive measures.

  • 11.
    Huss, Fredrik
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Hand och plastikkirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Erlandsson, Ulf
    Sjöberg, Folke
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Hand och plastikkirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Dödsfall vid bränder - skyddet för riskgrupper kan förbättras. Angeläget att vård- och omsorgspersonal bidrar i det förebyggande arbetet2003Inngår i: Läkartidningen, ISSN 0023-7205, E-ISSN 1652-7518, Vol. 100, s. 1137-1139Artikkel i tidsskrift (Annet vitenskapelig)
  • 12.
    Huss, Fredrik
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Kratz, Gunnar
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för biomedicin och kirurgi, Avdelningen för kirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Kirurgisk behandling av svårläkta sår2005Inngår i: Nordisk geriatrik, ISSN 1403-2082, nr 1, s. 30-35Artikkel i tidsskrift (Fagfellevurdert)
  • 13.
    Huss, Fredrik
    et al.
    Linköpings universitet, Institutionen för biomedicin och kirurgi, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken med brännskadeenheten.
    Nyman, Erika
    Linköpings universitet, Institutionen för biomedicin och kirurgi, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken med brännskadeenheten.
    Bolin, Johanna S C
    Linköpings universitet, Institutionen för biomedicin och kirurgi, Hand och plastikkirurgi. Linköpings universitet, Institutionen för medicin och hälsa. Linköpings universitet, Hälsouniversitetet.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för biomedicin och kirurgi, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken med brännskadeenheten.
    Use of macroporous gelatine spheres as a biodegradable scaffold for guided tissue regeneration of healthy dermis in humans: An in vivo study2010Inngår i: Journal of Plastic, Reconstructive & Aesthetic Surgery, ISSN 1748-6815, E-ISSN 1532-1959, Vol. 63, nr 5, s. 848-857Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    If a biodegradable scaffold is applied, the dermis can be regenerated by guided tissue regeneration. Scaffolds can stimulate in-growth of cells from the surroundings that migrate into them and start to produce autologous extracellular matrix as the scaffold is degraded. Several materials are available, but most of them are in the form of sheets and need to be laid on an open wound surface. A number of injectable fillers have been developed to correct soft-tissue defects. However, none of these has been used for guided tissue regeneration. We present a new technique that could possibly be used to correct dermal defects by using macroporous gelatine spheres as a biodegradable scaffold for guided tissue regeneration. In eight healthy volunteers, intradermal injections of macroporous gelatine spheres were compared with injections of saline and hyaluronic acid (Restylane (R)). Full-thickness skin biopsy specimens of the implants and surrounding tissue were removed 2, 8, 12 and 26 weeks after injection, and the (immuno) histological results were analysed. The Restylane (R) merely occupied space. It shattered the dermal tissue and compressed collagen fibres and cells at the interface between the implant and the dermis. No regeneration of tissue was found with this material at any time. The macroporous gelatine spheres were populated with fibroblasts already after 2 weeks. After 8 weeks the spheres were completely populated by fibroblasts producing dermal tissue. After 12 and 26 weeks, the gelatine spheres had been more or less completely resorbed and replaced by vascularised neodermis. There were no signs of capsular formation, rejection or adverse events in any subject. Further in vivo studies in humans are needed to evaluate the effect of the macroporous spheres fully as a matrix for guided tissue regeneration with and without cellular pre-seeding. However, the results of this study indicate the possibility of using macroporous gelatine spheres as an injectable, three-dimensional, degradable matrix for guided tissue regeneration.

  • 14.
    Huss, Fredrik
    et al.
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Nyman, Erika
    Gustafson, Carl-Johan
    Gisselfält, Katrin
    Liljensten, Elisabeth
    Kratz, Gunnar
    Linköpings universitet, Hälsouniversitetet. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Characterisation of a new degradable polymer scaffold for regeneration of the dermis: In vitro and in vivo human studies2008Inngår i: Organogenesis, ISSN 1547-6278, Vol. 4, nr 3, s. 195-200Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Full thickness skin wounds in humans heal with scars, but without regeneration of the dermis. A degradable poly(urethane urea) scaffold (PUUR), Artelon® is already used to reinforce soft tissues in orthopaedics, and for treatment of osteoarthritis of the hand, wrist and foot. In this paper we have done in vitro experiments followed by in vivo studies to find out whether the PUUR is biocompatible and usable as a template for dermal regeneration. Human dermal fibroblasts were cultured on discs of PUUR, with different macrostructures (fibrous and porous). They adhered to and migrated into the scaffolds, and produced collagen. The porous scaffold was judged more suitable for clinical applications and 4 mm Ø, 2 mm-thick discs of porous scaffold (12% w/w or 9% w/w polymer solution) were inserted intradermally in four healthy human volunteers. The implants were well tolerated and increasing ingrowth of fibroblasts was seen over time in all subjects. The fibroblasts stained immunohistochemically for procollagen and von Willebrand factor, indicating neocollagenesis and angiogenesis within the scaffolds. The PUUR scaffold may be a suitable material to use as a template for dermal regeneration. ©2008 Landes Bioscience.

  • 15. Bestill onlineKjøp publikasjonen >>
    Huss, Fredrik R.M.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet.
    In vitro and in vivo studies of tissue engineering in reconstructive plastic surgery2005Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    To correct, improve, and maintain tissues, and their functions, are common denominators in tissue engineering and reconstructive plastic surgery. This can be achieved by using autolo-gous tissues as in flaps or transplants. However, often autologous tissue is not useable. This is one of the reasons for the increasing interest among plastic surgeons for tissue engineering, and it has led to fruitful cross-fertilizations between the fields. Tissue engineering is defined as an interdisciplinary field that applies the principles of engineering and life sciences for development of biologic substitutes designed to maintain, restore, or improve tissue functions. These methods have already dramatically improved the possibilities to treat a number of medical conditions, and can arbitrarily be divided into two main principles:

    > Methods where autologous cells are cultured in vitro and transplanted by means of a cell suspension, a graft, or in a 3-D biodegradable matrix as carrier.

    > Methods where the tissue of interest is stimulated and given the right prerequisites to regenerate the tissue in vivo/situ with the assistance of implantation of specially designed materials, or application of substances that regulate cell functions - guided tissue regeneration.

    We have shown that human mammary epithelial cells and adipocytes could be isolated from tissue biopsies and that the cells kept their proliferative ability. When co-cultured in a 3-D matrix, patterns of ductal structures of epithelial cells embedded in clusters of adipocytes, mimicking the in vivo architecture of human breast tissue, were seen. This indicated that human autologous breast tissue can be regenerated in vitro.

    The adipose tissue is also generally used to correct soft tissue defects e.g. by autologous fat transplantation. Alas 30-70% of the transplanted fat is commonly resorbed. Preadipocytes are believed to be hardier and also able to replicate, and hence, are probably more useful for fat transplantation. We showed that by using cell culture techniques, significantly more pre-adipocytes could survive and proliferate in vitro compared to two clinically used techniques of fat graft handling. Theoretically, a biopsy of fat could generate enough preadipocytes to seed a biodegradable matrix that is implanted to correct a defect. The cells in the matrix will replicate at a rate that parallels the vascular development, the matrix subsequently degrades and the cell-matrix complex is replaced by regenerated, vascularized adipose tissue.

    We further evaluated different biodegradable scaffolds usable for tissue engineering of soft tissues. A macroporous gelatin sphere showed several appealing characteristics. A number of primary human ecto- and mesodermal cells were proven to thrive on the gelatin spheres when cultured in spinner flasks. As the spheres are biodegradable, it follows that the cells can be cultured and expanded on the same substrate that functions as a transplantation vehicle and scaffold for tissue engineering of soft tissues.

    To evaluate the in vivo behavior of cells and gelatin spheres, an animal study was performed where human fibroblasts and preadipocytes were cultured on the spheres and injected intra-dermally. Cell-seeded spheres were compared with injections of empty spheres and cell suspensions. The pre-seeded spheres showed a near complete regeneration of the soft tissues with neoangiogenesis. Some tissue regeneration was seen also in the ‘naked’ spheres but no effect was shown by cell injections.

    In a human pilot-study, intradermally injected spheres were compared with hyaluronan. Volume-stability was inferior to hyaluronan but a near complete regeneration of the dermis was proven, indicating that the volume-effect is permanent in contrast to hyaluronan which eventually will be resorbed. Further studies are needed to fully evaluate the effect of the macroporous gelatin spheres, with or without cellular pre-seeding, as a matrix for guided tissue regeneration. However, we believe that the prospect to use these spheres as an injectable, 3D, biodegradable matrix will greatly enhance our possibilities to regenerate tissues through guided tissue regeneration.

    Delarbeid
    1. Mammary epithelial cell and adipocyte co-culture in a 3-D matrix: The first step towards tissue-engineered human breast tissue
    Åpne denne publikasjonen i ny fane eller vindu >>Mammary epithelial cell and adipocyte co-culture in a 3-D matrix: The first step towards tissue-engineered human breast tissue
    2001 (engelsk)Inngår i: Cells Tissues Organs, ISSN 1422-6405, Vol. 169, nr 4, s. 361-367Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Reconstruction of the female breast after cancer surgery is a demanding task where the methods used today suffer from several disadvantages. In the present study we have investigated the possibility to use tissue engineering methods to regenerate human autologous breast tissue. Human mammary epithelial cells and preadipocytes were derived from breast tissue biopsies from healthy women undergoing reduction mammoplasty, and the two celltypes were co-cultured with conventional cell culture methods as well as in 3-D matrices. The study shows that it is possible to harvest both human mammary epithelial cells and preadipocytes in a single session, propagate several subcultures, and that the cells maintain a normal intercellular distribution and growth-pattern when co-cultured in a 3-D collagen gel. We propose that growth and formation of a tissue closely resembling normal human breast tissue be readily obtained in the described in vitro cell culture set-up using basic tissue engineering principles. This concept may be of great importance in the development of new methods for reconstruction of the human breast.

    Emneord
    Tissue engineering, Adipocyte, Mammary epithelial cell, Breast tissue
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14344 (URN)10.1159/000047903 (DOI)
    Tilgjengelig fra: 2007-03-16 Laget: 2007-03-16 Sist oppdatert: 2009-08-18
    2. Adipose tissue processed for lipoinjection shows increased cellular survival in vitro when tissue engineering principles are applied: Culture techniques and survival of fat
    Åpne denne publikasjonen i ny fane eller vindu >>Adipose tissue processed for lipoinjection shows increased cellular survival in vitro when tissue engineering principles are applied: Culture techniques and survival of fat
    2002 (engelsk)Inngår i: Scandinavian Journal of Plastic and Reconstructive Surgery and Hand Surgery, ISSN 0284-4311, Vol. 36, nr 3, s. 166-171Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Correcting soft tissue defects by autologous fat grafting is a routine procedure in plastic surgery. Its efficacy and safety has been discussed extensively and several techniques of lipoinjection have been developed. However, one is bound to overcorrect by 30%-70% or need to repeat the procedure because of resorption of the transplant. The reasons are that many of the transplanted cells are already differentiated, and also that there is no nutritional support to the inner cell layers when they are transplanted as fragments. By culturing autologous adipocytes one can ensure that only non-differentiated, but committed, preadipocytes are transplanted and the procedure can be done in a way that ensures optimal nutritional support for the cells. In the present study we have compared our cell culture technique with two common clinical ways of processing liposuction material and found that (pre)adipocytes survive and proliferate significantly better in cell culture.

    Emneord
    words, cell culture, fat grafting, tissue engineering
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14345 (URN)
    Tilgjengelig fra: 2007-03-16 Laget: 2007-03-16 Sist oppdatert: 2009-08-18
    3. New degradable polymer scaffold for regeneration of the dermis In vitro and in vivo studies
    Åpne denne publikasjonen i ny fane eller vindu >>New degradable polymer scaffold for regeneration of the dermis In vitro and in vivo studies
    Vise andre…
    Manuskript (Annet vitenskapelig)
    Identifikatorer
    urn:nbn:se:liu:diva-14346 (URN)
    Tilgjengelig fra: 2007-03-16 Laget: 2007-03-16 Sist oppdatert: 2010-01-13
    4. Growth of cultured human ecto- and mesodermal cells on macroporous biodegradable gelatin spheres
    Åpne denne publikasjonen i ny fane eller vindu >>Growth of cultured human ecto- and mesodermal cells on macroporous biodegradable gelatin spheres
    Vise andre…
    Manuskript (Annet vitenskapelig)
    Identifikatorer
    urn:nbn:se:liu:diva-14347 (URN)
    Tilgjengelig fra: 2007-03-16 Laget: 2007-03-16 Sist oppdatert: 2010-01-13
    5. Macroporous gelatine spheres as culture substrate, transplantation vehicle, and biodegradable scaffold for guided regeneration of soft tissues.: In vivo study in nude mice
    Åpne denne publikasjonen i ny fane eller vindu >>Macroporous gelatine spheres as culture substrate, transplantation vehicle, and biodegradable scaffold for guided regeneration of soft tissues.: In vivo study in nude mice
    2007 (engelsk)Inngår i: Journal of Plastic, Reconstructive, and Aesthetic Surgery, ISSN 1748-6815, Vol. 60, nr 5, s. 543-555Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    In the course of development of a new type of filler for the correction of small defects in soft tissues we studied macroporous gelatine spheres as culture substrate, transplantation vehicle, and biodegradable scaffold for guided regeneration of soft tissues in vivo. We injected intradermally in nude mice gelatine spheres that had either been preseeded with human fibroblasts or preadipocytes, or left unseeded. We compared the extent of regenerated tissue with that found after injections of saline or single-cell suspensions of human fibroblasts or preadipocytes. Routine histological examinations and immunohistochemical staining for von Willebrand factor (indicating neoangiogenesis) were made after 7, 21, and 56 days. Injected saline or single-cell suspensions had no effect. However, a quick and thorough tissue regeneration with developing neoangiogenesis was elicited by the gelatine spheres and the effect of spheres preseeded with preadipocytes surpassed the effect of spheres preseeded with fibroblasts, which in turn surpassed the effect of unseeded gelatine spheres. We suggest that minor soft tissue defects such as wrinkles or creases can be corrected by injection of naked macroporous gelatine spheres, whereas larger defects are best corrected by injection of macroporous gelatine spheres preseeded with fibroblasts, or preadipocytes, or both.

    Emneord
    Filler, Soft tissue defect, Guided tissue regeneration, Tissue engineering, Animal, In vivo
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14348 (URN)10.1016/j.bjps.2005.10.031 (DOI)
    Tilgjengelig fra: 2007-03-16 Laget: 2007-03-16 Sist oppdatert: 2009-08-18
    6. Use of macroporous gelatine spheres as a biodegradable scaffold for guided tissue regeneration in humans: An in vivo study
    Åpne denne publikasjonen i ny fane eller vindu >>Use of macroporous gelatine spheres as a biodegradable scaffold for guided tissue regeneration in humans: An in vivo study
    2005 (engelsk)Inngår i: Journal of Plastic, Reconstructive, and Aesthetic Surgery, ISSN 1748-6815Artikkel i tidsskrift (Fagfellevurdert) Submitted
    HSV kategori
    Identifikatorer
    urn:nbn:se:liu:diva-14349 (URN)
    Tilgjengelig fra: 2007-03-16 Laget: 2007-03-16
  • 16.
    Huss, Fredrik R.M.
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Junker, Johan P.E.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Cellbiologi. Linköpings universitet, Hälsouniversitetet.
    Johnson, Hans
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Kirurgi. Linköpings universitet, Hälsouniversitetet.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Macroporous gelatine spheres as culture substrate, transplantation vehicle, and biodegradable scaffold for guided regeneration of soft tissues.: In vivo study in nude mice2007Inngår i: Journal of Plastic, Reconstructive, and Aesthetic Surgery, ISSN 1748-6815, Vol. 60, nr 5, s. 543-555Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the course of development of a new type of filler for the correction of small defects in soft tissues we studied macroporous gelatine spheres as culture substrate, transplantation vehicle, and biodegradable scaffold for guided regeneration of soft tissues in vivo. We injected intradermally in nude mice gelatine spheres that had either been preseeded with human fibroblasts or preadipocytes, or left unseeded. We compared the extent of regenerated tissue with that found after injections of saline or single-cell suspensions of human fibroblasts or preadipocytes. Routine histological examinations and immunohistochemical staining for von Willebrand factor (indicating neoangiogenesis) were made after 7, 21, and 56 days. Injected saline or single-cell suspensions had no effect. However, a quick and thorough tissue regeneration with developing neoangiogenesis was elicited by the gelatine spheres and the effect of spheres preseeded with preadipocytes surpassed the effect of spheres preseeded with fibroblasts, which in turn surpassed the effect of unseeded gelatine spheres. We suggest that minor soft tissue defects such as wrinkles or creases can be corrected by injection of naked macroporous gelatine spheres, whereas larger defects are best corrected by injection of macroporous gelatine spheres preseeded with fibroblasts, or preadipocytes, or both.

  • 17.
    Huss, Fredrik R.M.
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Adipose tissue processed for lipoinjection shows increased cellular survival in vitro when tissue engineering principles are applied: Culture techniques and survival of fat2002Inngår i: Scandinavian Journal of Plastic and Reconstructive Surgery and Hand Surgery, ISSN 0284-4311, Vol. 36, nr 3, s. 166-171Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Correcting soft tissue defects by autologous fat grafting is a routine procedure in plastic surgery. Its efficacy and safety has been discussed extensively and several techniques of lipoinjection have been developed. However, one is bound to overcorrect by 30%-70% or need to repeat the procedure because of resorption of the transplant. The reasons are that many of the transplanted cells are already differentiated, and also that there is no nutritional support to the inner cell layers when they are transplanted as fragments. By culturing autologous adipocytes one can ensure that only non-differentiated, but committed, preadipocytes are transplanted and the procedure can be done in a way that ensures optimal nutritional support for the cells. In the present study we have compared our cell culture technique with two common clinical ways of processing liposuction material and found that (pre)adipocytes survive and proliferate significantly better in cell culture.

  • 18.
    Huss, Fredrik R.M.
    et al.
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Brännskadevård. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Kratz, Gunnar
    Linköpings universitet, Institutionen för klinisk och experimentell medicin, Hand och plastikkirurgi. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Rekonstruktionscentrum, Hand- och plastikkirurgiska kliniken US.
    Mammary epithelial cell and adipocyte co-culture in a 3-D matrix: The first step towards tissue-engineered human breast tissue2001Inngår i: Cells Tissues Organs, ISSN 1422-6405, Vol. 169, nr 4, s. 361-367Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Reconstruction of the female breast after cancer surgery is a demanding task where the methods used today suffer from several disadvantages. In the present study we have investigated the possibility to use tissue engineering methods to regenerate human autologous breast tissue. Human mammary epithelial cells and preadipocytes were derived from breast tissue biopsies from healthy women undergoing reduction mammoplasty, and the two celltypes were co-cultured with conventional cell culture methods as well as in 3-D matrices. The study shows that it is possible to harvest both human mammary epithelial cells and preadipocytes in a single session, propagate several subcultures, and that the cells maintain a normal intercellular distribution and growth-pattern when co-cultured in a 3-D collagen gel. We propose that growth and formation of a tissue closely resembling normal human breast tissue be readily obtained in the described in vitro cell culture set-up using basic tissue engineering principles. This concept may be of great importance in the development of new methods for reconstruction of the human breast.