Effects of Talmyung-san on the Cultured Rat Myocardiac Cell and Vascular Smooth Muscle Cell

탈명산(奪命散)이 배양심근세포(培養心筋細胞) 및 혈관평골근세포(血管平滑筋細胞)에 미치는 영향(影響)

  • 성강경 (원광대학교 광주한방병원) ;
  • 박세홍 (원광대학교 광주한방병원)
  • Published : 2000.08.30

Abstract

Objectives : Talmyung-san(TMS) has been used for treatment of brain diseases in Chinese traditional medicine. However, little is known about the mechanism by which TMS rescues brain cells from ischemic damages. To elucidate the protective mechanisms of TMS, we execute experiments. Methods : The effects of TMS on ischemia/reperfusion-induced cytotoxicity and generation of nitric oxide(NO) are investigated in primary neonatal myocardial cells and A7rS, aortic smooth muscle cell line. Results : Ischemia/reperfusion itself induces severe myocardial cell death in vitro. However, treatment of the cells with TMS significantly reduces both ischemia/reperfusion-induced myocardial cell death and LDH release. In addition, pretreatment of TMS before reperfusion recovers the lose of beating rates alter ischemia/reperfusion. For a while, the water extract of TMS stimulates myocardial cells to produce NO in a dose dependent manner and it protects the damage of ischemia/reperfusion-induced myocardial cells. Furthermore, the protective effects of the water extract of TMS is mimicked by treatment of sodium nitroprusside, an exogenous NO donor. NG-monomethyl-L-arginine (NGMMA), a specific inhibitor of nitric oxide synthase(NOS), significantly blocks the protective effects of TMS on the cells after ischemia/reperfusion. In addition, on ischemia the water extract of TMS induce NO in A7r5 cell. Conclusions : Taken together, we suggest that the protective effects of TMS against ischemia/reperfusion-induced myocardial damages may be mediated by NO production of myocardial and vascular smooth muscle cell during ischemic condition.

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