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  • 2000-2004  (1)
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  • 1
    ISSN: 1524-475X
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Inflammatory cells are generally assumed to be the primary source of most growth factors/cytokines that participate in wound healing. Correspondingly, most attempts to enhance wound healing have been directed at the wound itself. However, certain key factors such as insulin-like growth factor-I (IGF-I) and related proteins are present in blood in sufficient quantities to suggest significant contributions from outside the wound. Because little is known of the dynamics of IGF family members in wounds, particularly in human wounds, we serially measured the mRNAs and proteins of the IGF family in fluid and tissues taken from acute as well as chronically inflamed human wounds and compared them to their corresponding concentrations in blood. We also measured transforming growth factor-β1 and -β3, vascular endothelial growth factor, interleukin-1β, matrix metalloproteinases and selected isomers/receptors, all of which are associated with inflammation. All IGF proteins reached their highest concentrations immediately after injury. No difference between IGF-I mRNA expression between acute and inflamed wounds was found. As a group, IGF-related proteins, in contrast to transforming growth factor-β, vascular endothelial growth factor, and interleukin-1β, are highly correlated to and are generally below their concentrations in blood and are not elevated by inflammation. The IGF family therefore appears to enter wounds, even inflamed wounds, mainly from blood. If blood IGF-I is low, wound levels are lower. This data suggests that healing impairment due to IGF-I deficiency can be readily detected and is, at least in part, easily and safely correctable. (WOUND REP REG 2003;11:253–260)
    Materialart: Digitale Medien
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