新生内膜
再狭窄
血管平滑肌
细胞凋亡
细胞生长
细胞周期
癌症研究
医学
生物
细胞生物学
药理学
内分泌学
内科学
生物化学
支架
平滑肌
作者
Juan F. Granada,Diana Ensenat,Amit N. Keswani,Grzegorz L. Kałuża,Albert E. Raizner,Xiaoming Liu,Kelly J. Peyton,Mohammed Ali Azam,Hong Wang,William Durante
标识
DOI:10.1161/01.atv.0000184779.01822.9d
摘要
Objective— Mitomycin C (MMc) is an antibiotic that exerts a potent antiproliferative effect in tumor cells. Because the proliferation of vascular smooth muscle cells (VSMCs) plays a prominent role in the development of restenosis after percutaneous coronary interventions, the present study examined the effect of MMc on VSMC proliferation and on neointima formation after arterial balloon injury. Methods and Results— Treatment of cultured rat aortic VSMCs with MMc (1 nmol to 30 μmol/L) inhibited VSMC proliferation in a concentration-dependent manner. Whereas high concentrations of MMc (1 to 30 μmol/L) induced VSMC apoptosis, as reflected by DNA laddering and caspase-3 activation, lower concentrations of MMc (1 to 300 nmol/L) directly inhibited VSMC growth by arresting cells in the G 2 /M phase of the cell cycle. The antiproliferative action of MMc was associated with a selective increase in the expression of the cyclin-dependent kinase inhibitor p21, and with a decrease in cyclin B1-cyclin-dependent kinase-1 complex activity. Finally, the local perivascular delivery of MMc immediately after balloon injury of rat carotid arteries induced p21 expression and markedly attenuated neointima formation. Conclusion— These studies demonstrate that MMc exerts a potent inhibitory effect on VSMC proliferation and neointima formation after arterial injury. MMc represents a potentially new therapeutic agent in treating and preventing vasculoproliferative disease.
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