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  • 1
    ISSN: 1435-0130
    Keywords: Key words Keratinocytes ; Fibrin glue ; Cell delivery system ; Wound healing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  To circumvent well-known drawbacks inherent in cultured epidermal sheet grafts, a new keratinocyte delivery system was experimently investigated. Human subconfluent keratinocytes were labeled with fluorescence cell linker and cultured in two brands of fibrin glue (TissucolR and BeriplastR) in vitro for 5 days. Keratinocyte fibrin glue suspensions were grafted onto full thickness wounds in athymic nude mice for macroscopic and microscopic investigation. Keratinocytes survived in both fibrin glues in vitro for at least 5 days. When grafted onto wounds, cells maintained a high proliferation potential and at 5 days formed small masses or well-organised cell clusters within the fibrin network. After 7 days new epithelia enlarged and became thicker with high keratinization and occasional downward projections. At 10 days, wounds in both fibrin groups were totally epitheliazied but only partially in the control group. Anti-involucrin and anti-laminin immunostainings indicated well-differentiated new epithelium derived from human keratinocytes and early reorganised basement membrane. The fibrin glues seem not only to deliver highly proliferative keratinocytes easily and effectively, but also provide an optimal milieu for their migration, proliferation and differentiation.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-0130
    Keywords: Key words Membrane cell grafts (MCG) ; Cryopreservation ; Transplantation ; Wound healing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Biobrane, an adherent, flexible temporary wound dressing was incubated with cultured human keratinocytes. The cells adhered quickly, forming ”membrane-cell-grafts” (MCG). Some of the grafts were frozen and, after thawing, viability was verified with an XTT colorimetric assay. MCGs, fresh and cryopreserved, were transplanted on full thickness wounds created on athymic nude mice and resulted in a differentiated epithelium of human phenotype. For further investigation immunohistochemistry, immunofluorescence and electronmicroscopy were performed. Conventional cultured epidermal grafts (CEG) and wounds without cell grafts served as control. Compared with CEG-grafted sites a reduced wound contraction was noticed and complete remodelling of the basement membrane zone was found. The effectiveness of the easy, uncomplicated production, cryopreservation and use, as well as the short culture period could lead to a new approach in the treatment of burns and chronic wounds.
    Type of Medium: Electronic Resource
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