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中国临床药理学与治疗学 ›› 2002, Vol. 7 ›› Issue (2): 124-126.

• 基础研究 • 上一篇    下一篇

川芎嗪对心肌细胞核钙转运功能异常的保护

夏腊梅, 伍杰雄1   

  1. 广东省顺德市杏坛医院, 顺德 528325;
    1中山大学医院管理处, 广州5100
  • 收稿日期:2001-10-22 修回日期:2002-12-18 出版日期:2002-04-26 发布日期:2020-11-27
  • 通讯作者: 夏腊梅, 女, 主管药师。Tel:0765-7784092 E-mail:xialamei1963@soho.com

Effects of liqustraxin on dysfunction of myocardial nuclear calcium trans-port

XIA La-Mei, WU Jie-Xiong1   

  1. Xintan Hospital, Shunde 528325;
    1Hospital Pharmaceutical Affairs of Sun Yat-sen University of Medical Sciences,Guangzhou 510089
  • Received:2001-10-22 Revised:2002-12-18 Online:2002-04-26 Published:2020-11-27

摘要: 目的: 观察异丙肾上腺素(ISO) 致大鼠心肌缺血损伤时心肌细胞核钙转运功能的变化及川芎嗪对其影响。 方法: Wistar 大鼠皮下注射 5 mg·kg-1 ISO 液, 造成心肌缺血损伤模型。超速离心分离纯化心肌细胞核。 酶学方法鉴定核纯度和测定核膜Ca2+-ATP 酶活性, 同位素法观测核钙的摄取。 结果: 与正常对照组比较, 心肌缺血组(实验组) 心肌细胞核膜 Ca2+ 依赖性ATP 酶活性降低 18.1%(P<0.05), 45Ca2+ 摄取效率也显著降低, 其最大反应速度(Vmax ) 降低 54.6%, 细胞核 Ca2+ 依赖性ATP 酶的最大反应速度(Vmax ) 降低 33.0%(P<0.05), 平衡常数(Km ) 降低 42.8%(P<0.01);川芎嗪保护组心肌细胞核 Ca2+-ATP 酶活性及核 45Ca2+ 摄取与正常对照组比较均未见显著性改变。结论: 川芎嗪对 ISO致大鼠心肌缺血损伤时心肌细胞核钙转运功能降低有保护作用。

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

Abstract: AIM: To observe the dysfunciton of my-ocardial nuclear calcium transport in rat myocardial injury and the effects of liqustraxin on it.METHODS: The model of myocardial damage was induced by subcutaneous injection of isoproterenol (ISO, 5 mg·kg-1 ·d-1 ).My-ocardial nuclei were purified with sucrose density centrifu-gation and identified zymologically.The activity of Ca2+-ATPase was measured zymologically and calcium uptake was assayed with 45Ca2+ isotope.RESULTS: Compared with the control, the Ca2+-ATPase activity of myocardial nuclear membrane in ischemia group(exprimental) was decreased by 18.1%(P<0.05), the nuclear 45Ca2+ up-take was significantly decreased and Vmax value was low-ered by 54.6%.Vmax and Km of ATPase activity de-creased by about 33.0%(P<0.05) and 42.8%(P< 0.01) respectively.Compared with the control, Ca2+-ATPase activity and 45 Ca2+ uptake in the myocardial nu-clei of the liqustraxin group showed no significant change.CONCLUSION: Liqustraxin has notable protective ef-fects on dysfunction of nuclear calcium transport in rat myocardium.

Key words: liqustraxin, Ca2+ transport, Ca2+-AT-Pase, nucleus/myocardium

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