• Yapeng Wang, Xin Zhang, Ming Zhou, Yongwei Wu, Yunhong Ma, Jun Liu, and Yongjun Rui.
• Department of Orthopaedics Surgery, Wuxi No.9 People's Hospital Affiliated to Soochow University, Wuxi, 214000, China.
• Injury. 2020 Nov 1; 51 (11): 2442-2448.

BackgroundThe present study was designed to investigate the effects of irisin pre-treatment on multi-territory perforator flap survival and blood vessels of Choke II zone in rats and to explore the underlying mechanism.MethodsEighty adult Sprague-Dawley (SD) rats were divided into the Irisin group and the saline group (N = 40 each), and subjected to multi-territory perforator flap operations on the left flank. Rats in the irisin group were intraperitoneally injected with irisin (40 ng/kg), and rats in the control group were intraperitoneally injected with normal saline. Seven days after operation, we calculated the surviving flap area was calculated, and measured the density of microvessels, epidermal growth factor and blood flow in Choke II zone.ResultsIrisin pre-treatment could improve the flap survival area, increase average density of microvessels and up-regulate the mRNA and protein level of vascular endothelial growth factor, thereby promoting flap angiogenesis.ConclusionIrisin improved flap blood supply and increase the survival rate of multi-territory perforator flap by promoting angiogenesis of flank multi-territory perforator flap survival in Choke II zone.Copyright © 2020. Published by Elsevier Ltd.

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