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  • 1
    Digitale Medien
    Digitale Medien
    Malden, USA : Blackwell Science Inc
    Wound repair and regeneration 11 (2003), S. 0 
    ISSN: 1524-475X
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: There is a great need to establish reproducible methods for evaluative studies of wound treatment and wound healing. Validation of the healing process through optical techniques, as well as histologic and immunohistochemical methodologies, have been improved and to some extent have become well-established assays. Data relating to biomechanical properties, e.g., evaluation of the tensile strength of scar tissue that forms in experimental wound treatment strategies, are less widely available. We chose the domestic pig as an animal model in which to examine epidermal wound healing. We implanted specially made chambers that served to isolate the wounds and prevent epidermal migration from the edges. We performed histologic and immunohistochemical analyses as well as evaluation of biomechanical qualities of scar tissue using laser tensiometry. Pig skin is well suited for wound healing studies, and wound creation, implantation of the chambers, and the regular changing of dressings could all be carried out in the operating theater. In addition to established macroscopic evaluation and microscopic documentation, the need for objective biomechanical assessment of scar tissue by measuring tensile strength has been met using laser tensiometry. By optimizing methods for measuring tensile strength, it is possible to evaluate the biomechanical quality of scar tissue formed following different courses of wound treatment, as well as histologic assessment. (WOUND REP REG 2003;11:150–157)
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1573-6814
    Schlagwort(e): human keratinocyte cultivation ; hyperbaric oxygenation ; wound healing
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A drop in tissue oxygen partial pressure below 30 mm Hg as a result of reduced perfusion in an extensive area of acute skin damage, or where a large number of chronic skin defects occur, inhibits collagen synthesis and neoangiogenesis in the various phases of wound healing. Subsequent granulation and epithelialisation are correspondingly impaired. Hyperbaric oxygenation is now recognised as a valuable supplementary method of treatment for problematic wounds. Stimulation of fibroblast and endothelial cell proliferation through Hyperbaric oxygenation has been demonstrated in numerous studies. The aim of this study was to investigate the effect of hyperbaric oxygen treatment on the proliferation and differentiation of human keratinocyte cultures. The influence of hyperbaric oxygenation on the proliferation of human keratinocyte cultures was demonstrated using flow-through cytometry and a fluorescence activated cell sorter, which detects fluorescence intensity following incorporation of 5-bromo-2′-deoxyuridine in cell DNA. The degree of cell differentiation was deduced from the expression of various components of the cytoskeleton, such as cytokeratin 10 and involukrin, the production of which was quantified through the determination of monoclonal antibodies against cytokeratin 10 and involukrin from measurements of fluorescence activity in a flow-through cytometer. Hyperbaric oxygenation of cell cultures in vitro did not produce a significantly higher rate of cell proliferation, so that no increase in vitality was observed. An interesting observation following exposure to hyperbaric oxygen was the marked increase in expression of both cytokeratin 10 and involukrin, as an indication of accelerated cell differentiation.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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