期刊文献+

大豆异黄酮对培养心肌细胞钙电流和动作电位的影响 被引量:6

Effects of soybean isoflavone on calcium electricity and action potential in cultured neonatal rat cardiomyocytes
在线阅读 下载PDF
导出
摘要 目的观察大豆异黄酮(SI)对大鼠心肌细胞动作电位的影响和培养心室肌细胞钙电流的作用。方法采用悬浮玻璃微电极法和全细胞膜片钳方法。结果SI能剂量依赖性地降低动作电位幅值(APA)、超射(OS)、最大除极速率(Vmax)、缩短复极50%及90%水平的动作电位时程(APD50、APD90);SI 0.1μg/m l和1.0μg/m l对L-型钙电流可见不同程度的抑制作用。结论SI可使心肌细胞动作电位除极参数降低,动作电位时程缩短,对钙电流的抑制作用可减轻心肌细胞钙超载,进而保护心肌。 Objective To observe the effects of soybean isoflavone (SI) on the action potential in rats cardiomyocytes and the L-type calcium current in cultured neonatal rat ventricular cells. Methods The glass suspension electrode and the whole cell voltage clamp technique were used. Results SI could reduce the action potential amplitude (APA), overshoot (OS), maximal velocity of phase 0 depelarizatian (Vmax) and repolarization action potantial duration (APD50 and APD90) in dose-dependence. SI (0.1, 1.0 μg/ml) had inhibition on the L-type calcium current. Condusions SI could reduce parameters of polarization of action potential and APD, alleviate calcium overload in myocardium by inhibiting calcium current to protect myocardium.
出处 《中国老年学杂志》 CAS CSCD 北大核心 2006年第2期206-208,共3页 Chinese Journal of Gerontology
基金 吉林省科委资助项目(20020503-16)
关键词 大豆异黄酮 培养心室肌细胞 L-型钙电流 膜片钳 动作电位 Soybean isoflavone Cultured ventricular cells L-type calcium current Patch clamp Action potential
  • 相关文献

参考文献5

二级参考文献38

  • 1安瑞海 何瑞荣 等.Electrophysio-logical effects of m-nisolidipine and nisodipine on papillary muscles of guinea pig[J].Acta Pharmacol Sin(中国药理学报),1990,11:310-314.
  • 2Nevala R,Paukku K,:Korpela R,et al. Calcium-sensitive potassium channel inhibitors antagonize Kenistein-and daidzein-induced arterial relaxation in vitro[J]. Life Sci 2001,69( 12 ) :1407-1417.
  • 3Nevala R,Korpela R ,Vapantalo H. Plant derived estrogens relax rat mesenteric artery in vitro[J]. Life Sci 1998.63(6) :95-100.
  • 4Figtree GA, Griffiths H, Lu YQ ,et al. Plant-derived estrogens relax coronary arteries in vitro by a calcium antagonistic mechanism [ J]. J Am Coll Cardiol,2000,35 : 1977-1985.
  • 5Mishra SK, Abbot SE ,Choudhury Z, et al. Endothelium-dependent relaxation of rat aorta and main pulmonary artery by the phytoestrogens genistein and daidzein[J]. Cardiovase Res,2000,46(3) :539-546.
  • 6Satake N, Imanishi M, Keto Y, et al. Genistein potentiates the relaxation induced by betal-and beta2-adrenoceptor activation in rat aortic rings[J]. J Cardiovase Pharmacol,2000,35(2) :227-233.
  • 7Satake N, Imanishi M, Shibata S. Increased nitroglycerin-induced relaxation by genistein in rat aortic rings[J]. Eur J Pharmacol,1999,377(2-3) :193-197.
  • 8Karamsetty MR,Klinger JR,Hill NS. Phytoestrogens restore nitric oxide-mediated relaxation in isolated pulmonary arteries from chronically hypoxic rats[J]. J pharmacol Exp Ther,2001,297 (3) :968-974.
  • 9Squadrito F,Altarilla D,Squadrito G,et al. Genistein supplementation and estrogen replacement therapy improve endothelial dysfunction induced by ovariectomy in rats [J]. Cardiovasc Res,2000,45 (2) :454-462.
  • 10Metals C,Li J,Simons M,et al. Effects of coronary artery disease on expression and microvascular response to VEGF[ J ]. Am J Physiol, 1998,275 (4) :1411-1418.

共引文献37

同被引文献43

引证文献6

二级引证文献22

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部