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中国临床药理学与治疗学 ›› 2000, Vol. 5 ›› Issue (1): 25-27.

• 论著 • 上一篇    下一篇

牛磺酸对大鼠心肌损伤时心肌细胞核钙转运功能异常的保护作用

万福生, 曾昭建, 赵小曼, 罗达亚   

  1. 江西医学院生化与分子生物学教研室,南昌 330006
  • 收稿日期:1999-12-10 修回日期:2000-02-16 出版日期:2000-03-26 发布日期:2020-11-26
  • 作者简介:万福生,男,42 岁,硕士,副教授,主要从事血管生化及分子生物学研究。

Effects of Taurine on dysfunction of myocardial nuclear calcium transport in rat myocardial injury induced with isoproterenol

WAN Fu-Sheng, ZENG Zhao-Jian, ZHAO Xiao-Man, LUO Da-Ya   

  1. Department of Biochemist ry and Molecular Biology,Jiangxi Medical College,Nanchang 330006
  • Received:1999-12-10 Revised:2000-02-16 Online:2000-03-26 Published:2020-11-26

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异常变化及牛磺酸对其影响。方法 给Wi ste r 大鼠皮下注射5 mg·kg-1ISO 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+-AT P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) 心肌细胞核膜钙依赖性AT Pase 活性降低18.1%(P<0.05),45C a2+摄取效率也显著降低,其最大速度降低54.6%;牛磺酸保护组心肌细胞核Ca2+-A TPase 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 牛磺酸对ISO 致大鼠心肌损伤时心肌细胞核钙转运功能降低有保护作用。

关键词: 心肌损伤, 钙转运, 细胞核, 牛磺酸

Abstract: Aim To observe the dysfunction of my ocardial nuclear calciumtransport in rat myocardial injury and effects of taurine on it.Methods The model of my ocardial damage was induced by subcutaneous injection of isoproterenol(ISO,5mg·kg-1·d-1).Myocardial nuclei were purified with Sucrose density cent rifuga tion and ident if iedzymolog ically.The activity of Ca2+-ATPase was measured zymolog ically and calcium uptake was assayed with45Ca2+iso tope.Results Compared with the control,the Ca2+-ATPase activity of my ocardial nuclear in ischemia group was decreased by 18.1%(P<0.05),the nuclear45Ca2+uptake was significant decreased and Vmax value was lowered by 54.6%.With the controlg roup Ca2+-A TPase activ ity and45Ca2+uptake in the my ocardial nuclei of Taugroup showed nosignificant changes.Conclusion The above results indicated taurine has notable protective effects on dysfunction of nuclear calciumt ransport in rat my ocardium.

Key words: myocardial injury, Ca2+transport, nucleus, taurin

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