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Cell cycle activation and progression in vascular proliferative disease represent potent therapeutic targets. Luteolin, which occurs as glycosylated forms in celery, green pepper, perilla leaf, and camomile tea, has demonstrated antimutagenic, antitumorigenic, antioxidant, and antiinflammatory properties. In this study, we investigated the effect of luteolin on the proliferation of primary cultured rat aortic vascular smooth muscle cells induced by 5% fetal bovine serum. Luteolin at concentrations of 5, 20, and 50 μM significantly inhibited this proliferation by 29.6, 50.8, and 83.1%, respectively. The incorporation of [3H]-thymidine into DNA was also inhibited by 25.8, 57.6, and 81.0%, respectively. Flow cytometry analysis of DNA content revealed that FBS-inducible cell cycle progression was blocked by luteolin. Luteolin showed no cytotoxicity in VSMCs in this experimental condition according to WST-1 assays. Luteolin may represent a potential anti-proliferative agent for treatment of angioplasty restenosis and atherosclerosis.

Effects of Luteolin on Fetal Bovine Serum-induced Events in Cultured Rat Vascular Smooth Muscle Cells