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中国临床药理学与治疗学 ›› 2003, Vol. 8 ›› Issue (5): 573-578.

• 研究原著 • 上一篇    下一篇

川芎嗪对大鼠缺血心肌细胞核钙转运异常的影响

肖向荣, 万福生1   

  1. 江西省兴国县人民医院药剂科,兴国 342400,江西;
    1江西医学院生化与分子生物学教研室,南昌 330006,江西
  • 收稿日期:2003-03-05 修回日期:2003-04-16 出版日期:2003-10-26 发布日期:2020-11-19
  • 通讯作者: 李秋根,男,副主任医师,副教授,硕士生导师,主要从事哮喘研究。Tel:0791-6775619

Effects ofligustrazin on dysfunction of myocardial nuclear calcium trans-port in ischemic myocardial cells of rats

XIAO Xiang-Rong, WAN Fu-Sheng1   

  1. Department ofPharmacy,XingguoPeople' sHospital,Xingguo 342400,Jiangxi,China;
    1Department of Biochemistry and Molecular Biology,Jiangxi Medical College,Nanchang 330006,Jiangxi,China
  • Received:2003-03-05 Revised:2003-04-16 Online:2003-10-26 Published:2020-11-19

摘要: 目的 观察大鼠缺血心肌细胞核钙转运功能的变化及川芎嗪的作用。方法 将 Wistar 大鼠随机分成对照组 、缺血组和川芎嗪保护组。采用皮下注射异丙肾上腺素(ISP,5 mg·kg-1),24 h 后再注射相同剂量一次,造成心肌缺血模型 。超速离心纯化细胞核,酶学法鉴定核纯度和测定核膜 Ca2+-ATPase活性,同位素法观测核钙的摄取。结果 缺血组心肌细胞核膜Ca2+-ATPase 活性较对照组下降 21.4%(P<0.01),45Ca2+摄取率也呈显著性降低,其最大反应速度(Vmax)降低 48.5%,细胞核膜 Ca2+ 依赖性 ATP酶的 Vmax降低 34.1%,Km值 降低 42.2%(P<0.01),川芎嗪保护组心肌细胞核 Ca2+-ATP酶活性及核45 Ca2+摄取率较缺血组均有显著性升高,且有剂量依赖关系。结论 川芎嗪对 ISP所致的缺血心肌细胞核钙转运功能下降有拮抗作用。

关键词: 药理学, 川芎嗪, 钙转运, 细胞核, Ca2+依赖性ATP酶, 心肌

Abstract: AIM: To observe the effectsofligustrazine on dysfunction of myocardial nuclear calcium transport in ischemic myocardial cellsof rats.METHODS: The isch-emic models of myocardial cells were induced by subcuta-neous injection of isoproterenol (ISP,5 mg·kg-1·d-1).Myocardial nuclei werePurified with ultracentrifugation and identified by enzymological assay.The activity of Ca2+-ATPase was measured by the same way and calcium uptake was assayed with45Ca2+isotope.RESULTS: The Ca2+-ATPase activity of myocardial nuclear membrane in ischemia grouPwas decreased by 21.4% (P<0.05)in comparison with that in control group.The nuclear45Ca2+uptake significantly decreased,and Vmaxvalue also de-creased by 48.5%.Vmaxand Kmof ATPase decreased by about 34.1% (P<0.05)and 42.2%(P<0.01)re-spectively.Ca2+-ATPase activity and 45 Ca2+uptake inthe myocardial nuclei of theligustrazin grouPshowed no significant change.CONCLUSION: Ligustrazin has no-tablyProtective effects on dysfunction of nuclear calcium transport in myocardial cells of rats.

Key words: pharmacology, ligustrazin, Ca2+trans-port, nucleus, Ca2+-ATPase, myocardium

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