Effect of proanthocyaindin on angiogenesis in rats with ischemic hindlimb / 中国综合临床

ABSTRACT

Objective To investigate the effect of proanthcyaindin on angiogenesis of rats with ischemic hindlimb.Methods Twelve male SD rats were randomized divided into control group (n =6) and proanthcyaindin group (PC group,n =6).Lower limb ischemia rat model was establish,rats in both group were administration by oral daily,and PC group was given proanthocyanidins 200 mg/(kg · d),while the control group received the same volume of saline.Forteen days after surgery,ischemic tissues of adductor were collected for several tests including the expression of CD31 in the ischemic muscle tissue and the number of new blood vessels by immunohistochemical staining,hypoxia inducible factor-1 protein expression by western blot,and vascular endothelial growth factor level test by enzyme-linked immunosorbent assay.Results The capillary count showed that the angiogenesis situation of PC group was (69.67 ±3.11)/HP,higher than that in control group((111.00 ± 3.11)/HP,t =13.350,P ＜ 0.0001).The HIF-1 protein expression in PC group was (1.90 ± 0.25),remarkable higher than that in control group (0.54 ± 0.21,t =4.183,P =0.0058).Compared with control group,VEGF level in PC group increased((432.86 ± 13.00) μg/L vs.(326.68 ± 11.08) μg/L,t =6.216,P ＜0.0001).Conclusion Proanthcyaindin plays a positive role in angiogenesis after ischemia.PC may induce up-regulation of HIF-1 and VEGF,and then promote the formation of endovascular through multiple signaling pathways consequently.