Journal
CURRENT OPINION IN RHEUMATOLOGY
Volume 25, Issue 1, Pages 87-91Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/BOR.0b013e32835b13b6
Keywords
angiogenesis; apoptosis; fibrosis; scars; wound healing
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Funding
- National Institute of General Medical Sciences of the National Institutes of Health [R01-GM50875, P20-GM078426]
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Purpose of review One well described feature of wound healing is the ingrowth of new capillaries or angiogenesis. At its peak, the capillary content in healing wounds may reach three or more times that of normal uninjured tissue. This new vasculature is required to restore oxygenation and allow the growth of new tissue to fill the wound space. This review examines the assumption that a capillary content in excess of normal density is essential for adequate healing. Recent findings The regulation of wound angiogenesis has been demonstrated to involve both proangiogenic and antiangiogenic stimuli, with the level of capillary growth reliant upon both sets of factors. Several studies now show that normal skin wounds heal adequately even when the angiogenic response is artificially reduced. In normal skin, a reduction of capillary growth to a level consistent with normal tissue does not affect wound closure and may even lead to highly favorable long term healing outcomes. Summary The angiogenic response in normal wounds may exceed what is needed for optimal repair.
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