Abstract:
OBJECTIVE:Wound healing is known to require a well-organized balance of numerous factors, e.g., cytokines, matrix metalloproteinases (MMPs), and their inhibitors, as well as direct cell-cell communication (connexins). Disruption of this balance may lead to the formation of chronic wounds such as diabetic foot ulcers. The transplantation of autologous keratinocytes is a promising therapy for diabetic foot ulcers; however, little is known about their characteristics on a molecular level. Therefore, we intended to characterize transplanted keratinocytes from diabetic and nondiabetic origin before and after transplantation. RESEARCH DESIGN AND METHODS:We isolated human keratinocytes from diabetic and nondiabetic origins and transplanted them into an ex vivo wound healing model. To characterize the keratinocytes, we investigated mRNA expression of MMP-1, MMP-2, and MMP-9; tissue inhibitor of MMP (TIMP)-1 and TIMP-2; interleukin (IL)-1beta, tumor necrosis factor (TNF)-alpha; Cx26 (connexin 26) and Cx43; and, for connexins, immunolocalization. RESULTS:We found no significantly increased expression of the molecules investigated in cultured keratinocytes from diabetic compared with nondiabetic origin, even though there were significant differences for MMP-2, IL-1beta, and TNF-alpha in skin biopsies. Expression of IL-1beta was significantly lower in keratinocytes from diabetic origin. In the course of wound healing, differences in the dynamics of expression of MMP-1, IL-1beta, and Cx43 were observed. CONCLUSIONS:Our results suggest that keratinocytes from diabetic origin are as capable for transplantation into chronic wounds as keratinocytes from healthy origin at the starting point of therapy. However, differences in expression dynamics later on might reflect the systemic influence of diabetes resulting in a memory of the transplanted keratinocytes.
journal_name
Diabetes Carejournal_title
Diabetes careauthors
Brandner JM,Zacheja S,Houdek P,Moll I,Lobmann Rdoi
10.2337/dc07-1304subject
Has Abstractpub_date
2008-01-01 00:00:00pages
114-20issue
1eissn
0149-5992issn
1935-5548pii
dc07-1304journal_volume
31pub_type
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