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中国临床药理学与治疗学 ›› 2004, Vol. 9 ›› Issue (12): 1369-1373.

• 研究原著 • 上一篇    下一篇

刺五加叶皂苷对心肌ATP 敏感性钾通道的作用

周逸, 唐其柱, 史锡滕1, 王滕   

  1. 武汉大学人民医院心血管内科, 1生物医学工程研究室, 武汉 430060, 湖北
  • 收稿日期:2004-10-20 修回日期:2004-12-03 出版日期:2004-12-26 发布日期:2020-11-19
  • 通讯作者: 唐其柱, 男, 教授, 博士生导师, 研究方向心脏电生理。Tel:027-88041911
  • 作者简介:周逸, 男, 硕士研究生, 研究方向:心脏电生理。Tel:027-88079064 E-mail:zy1295090909@yahoo.com.cn

Effects of acanthopanax senticosus saponins on myocardial ATP sensitive potassium channel

ZHOU Yi, TANG Qi-Zhu, SHI Xi-Teng1, WANG Teng   

  1. Effects of acanthopanax senticosus saponins on myocardial ATP sensitive potassium channelDepartment of Cardiology, 1Institute of Biomedical Engineering, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei, China
  • Received:2004-10-20 Revised:2004-12-03 Online:2004-12-26 Published:2020-11-19

摘要: 目的: 研究刺五加叶皂苷(ASS) 对心肌线粒体ATP 敏感性钾通道(mito KATP) 和细胞膜ATP 敏感性钾通道(sarcol KATP) 的作用, 探讨ASS 对缺血心肌保护作用的机制。方法: 用酶解法获取兔心室肌细胞, 激光扫描共聚焦显微镜观察ASS 对mito KATP 的作用, 全细胞膜片钳技术观察ASS 对sarcol KATP的作用。结果: 对照组观察10 min 线粒体荧光强度无明显变化。ASS 30、100 和300 mg·L-1组均可见用药后线粒体荧光强度明显增加, 分别增加(14.8±3.6) %、(30.4±4.3) % 和(38.4±5.7) %。3 μmol·L-1格列本脲不影响线粒体荧光强度, 但可以阻断ASS 对线粒体荧光强度的作用。而对照组、ASS 10、100 和300 μmol·L-1组的IK-ATP 峰值无明显差异。结论: ASS 对mito KATP 有开放作用, 而对sarcolKATP没有作用。ASS 通过开放mito KATP 产生心肌保护作用。

关键词: 刺五加叶皂苷, 心肌细胞, ATP 敏感性钾通道, 膜片钳, 激光扫描共聚焦显微镜

Abstract: AIM: To investigate the effects of acanthopanax senticosus saponins (ASS) on myocardial mitochondrial ATP sensitive potassium channel (mito KATP) and sarcolemmal ATP sensitive potassium channel (sarcol KATP) and to discuss the protection mechanisms of ASS on myocardial ischemia.METHODS: Ventricular myocytes of rabbits were isolated by enzymatic dissociation.Laser scanning confocal microscope (multi-photon) was used for observe the effects of ASS on mito KATP.The whole-cell patch clamp technique was used for observe the effects of ASS on sarcol KATP.RESULTS: There was no obvious variation of mitochondrial fluorescence intensity in control group during 10 min observation.Mitochondrial fluorescence intensity increased significantly in 30 mg·L-1ASS group, 100 mg·L-1ASS group and 300 mg·L-1ASS group after administration.The increments were (14.8±3.56) %, (30.4±4.34) % and (38.4±5.68) %, respectively.3 μmol·L-1of glibenclamide had no effect on mitochondrial fluorescence intensity, but it could block the effects of ASS on mitochondrial fluorescence intensity. There was no significant differences in the peak of IK-ATP between the control group, 30 mg·L-1ASS group, 100 mg·L-1ASS group, and 300 mg·L-1ASS group.CONCLUSION: ASS can open mito KATP, and it has no effect on sarcol KATP.The protection mechanism of ASS onmyocardial ischemia is related to opening mito KATP.

Key words: acanthopanax senticosus saponins, cardiac myocyte, ATP sensitive potassium channel, patchclamp, laser scanning confocal microscope

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