Add time:07/22/2019 Source:sciencedirect.com
Vascular smooth muscle cell (VSMC) proliferation and migration are crucial events in the pathological course of atherosclerosis and restenosis after percutaneous coronary intervention (PCI). Dioscin (cas 19057-60-4) has been shown to exhibit powerful cardiovascular protective effects and potent therapeutic potential in cancer owing to the inhibition of cell proliferation and migration. However, its effects on arterial wall hypertrophy-related diseases caused by VSMC proliferation and migration remain unclear. In this study, we investigated the effects of dioscin on intimal hyperplasia after balloon injury in vivo, its effects on VSMC proliferation and migration in vitro, and the mechanisms underlying these effects. Results showed that dioscin treatment significantly inhibited VSMC proliferation and intimal thickening after balloon injury. In cultured VSMCs, treatment with dioscin significantly decreased fetal bovine serum or platelet-derived growth factor-induced cell proliferation and migration. Moreover, dioscin inhibited the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2) and expression of Forkhead box M1 (FoxM1) and its downstream target genes. FoxM1 knockdown with shRNA partially counteracted the inhibitory effects of dioscin on cell proliferation and migration. In conclusion, we demonstrated that dioscin attenuated neointima formation in response to balloon injury by suppressing VSMC proliferation and migration through MAPK-FoxM1 pathway. Our data suggested that dioscin might be a potential therapeutic agent for atherosclerosis and restenosis after PCI.
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