Study on antiangiogenesis effects of quercetin

Aim To study the effects of Quercetin on the angioge ne sis and cultured human vascular endothelial cells (HUVEC).Methods In vivo, the effects of Quercetin on angiogenesis induced by vascular en dothelial growth factor (VEGF) and basic fibroblast growth factor(bFGF), were observ ed by chorioallantioic membrane (CAM) test. The effects of quercetin on proliferation of human vascular endothelial cells (HUVEC) were assessed by MTT assay. The effects of Quercetin on cell cycle of HUCEC were observed by flow cytometer (FCM ).Results The angiogenesis induced by VEGF in CAM was strongly inhibited by Quercetin with 0.1, 0.05 and 0.025 mmol·L -1; The angiogen esis induced by bFGF in CAM. was strongly inhibited by Quercetin with 0.1 and 0 .05 mmol·L -1. Quercetin markedly inhibited the proliferation of HUVEC with 240,120,60 and 30 μmol·L -1. The inhibition rate was 67.0%,58.1% ,39.7% and 20.7% respectively. Quercetin at the concentration of 240 μmol· L -1 and 120 μmol·L -1 resulted in S,G 2 arrest of HUVEC. Conclusion Quercetin has substantial inhibitory effects on angiogenesi s induced by VEGF and bFGF, and on proliferation of HUVEC.