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Endostatin Inhibits Ischemia-Induced Neovascularization and Increases Ischemic Tissue Loss

Annals of Plastic Surgery, ISSN: 0148-7043, Vol: 52, Issue: 5, Page: 512-518
2004
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Article Description

The impact of inhibitors of tumor angiogenesis (endostatin, angiostatin) on the neovascularization required for the healing of transferred tissue has not been examined. We investigated the effect of endostatin on the functional neovascularization of random pattern flaps. C57BL6 mice were pretreated with endostatin beginning 3 days prior to surgery (n = 10), and daily injections continued throughout the study. Dorsal random cutaneous flaps were raised in both treatment and control (saline-treated) groups. The remaining cranial attachment was divided on day 9. Oxygen tension (P) was measured using a microprobe on days 1, 3, 5 and 16. Flaps were harvested and the vasculature was stained with CD31 on day 16. We found that endostatin significantly decreased flap survival. Mice that were treated with endostatin had fewer CD31+ blood vessels, worse flap perfusion at all time points, and lower oxygen tensions throughout the length of the flap. These findings have potential implications for the patients undergoing antiangiogenesis therapy who require surgical reconstruction.

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