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- W2154962020 abstract "Integrin alphavbeta6 is an epithelial cell-specific receptor that is not normally expressed by resting epithelium but its expression is induced during wound healing. The function of alphavbeta6-integrin in wound repair is not clear. In the present study, we showed that beta6-integrin expression was strongly up-regulated in the epidermis in human chronic wounds but not in different forms of skin fibrosis. To test whether increased beta6-integrin expression plays a role in abnormal wound healing we developed four homozygous transgenic mouse lines that constitutively expressed human beta6-integrin in the epithelium. The mice developed normally and did not show any histological abnormalities in the skin. The rate of experimental skin wound closure was unaltered and the wounds healed without significant scar formation. However, during breeding program 16.1 to 27.0% of transgenic mice developed spontaneous, progressing fibrotic chronic ulcers. None of the wild-type animals developed these lesions. The chronic lesions had areas with severe fibrosis and numerous activated macrophages and fibroblasts expressing transforming growth factor (TGF)-beta. The level of TGF-beta1 was significantly increased in the lesions as compared with normal skin. The findings suggest that increased alphavbeta6-integrin in keratinocytes plays an active part in abnormal wound healing possibly through a mechanism involving increased activation of TGF-beta." @default.
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- W2154962020 date "2004-01-01" @default.
- W2154962020 modified "2023-10-18" @default.
- W2154962020 title "Increased Expression of β6-Integrin in Skin Leads to Spontaneous Development of Chronic Wounds" @default.
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- W2154962020 doi "https://doi.org/10.1016/s0002-9440(10)63113-6" @default.
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