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中国临床药理学与治疗学 ›› 2012, Vol. 17 ›› Issue (8): 860-867.

• 基础研究 • 上一篇    下一篇

珠子参总皂苷对H2O2诱导新生大鼠心肌细胞凋亡的抑制作用

陈良金1, 石孟琼1, 贺海波2, 熊兴军3, 卢训丛1   

  1. 1三峡大学医学院,宜昌 443002,湖北;2三峡大学天然产物研究与利用湖北省重点实验室,宜昌 443002,湖北;3长阳县中医院,长阳 443006,湖北
  • 收稿日期:2012-02-03 修回日期:2012-05-10 出版日期:2012-08-26 发布日期:2012-08-14
  • 通讯作者: 石孟琼,女,实验师,研究方向:心脑血管药理。Tel: 13687220902 E-mail: shmq0212@126.com
  • 作者简介:陈良金,男,副教授,研究方向:中医内科基础与临床。Tel: 15572761106 E-mail: cljcy@126.com

Protective effects of total saponin from Panacis majoris rhizoma against H2O2-induced apoptosis in neonatal rat cardiomyocytes

CHEN Liang-jin1, SHI Meng-qiong1, HE Hai-bo2, XIONG Xing-jun3, LU Xun-cong1   

  1. 1Medical Science College, China Three Gorges University, Yichang 443002, Hubei, China;
    2Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang 443002, Hubei, China;
    3Department of Pharmacy, Traditional Chinese Medicine Clinical Hospital, Changyang 443500, Hubei, China
  • Received:2012-02-03 Revised:2012-05-10 Online:2012-08-26 Published:2012-08-14

摘要: 目的: 观察珠子参总皂苷对H2O2诱导新生大鼠心肌细胞凋亡的抑制作用,并探讨其作用机制。方法: Wistar乳鼠心肌细胞原代培养,用H2O2建立氧化应激损伤模型,然后用珠子参总皂苷(100, 200 μg/mL)孵育 24 h后,MTT法检测珠子参总皂苷对细胞活力的影响,流式细胞仪和Hoechst33258染色检测珠子参总皂苷对氧化应激诱导细胞凋亡及胞内ROS含量的影响,比色法测定心肌细胞Caspase-3、Caspase-9的活性,荧光定量PCR测定心肌细胞Bcl-2和Bax mRNA表达,并计算Bcl-2与Bax的比值。结果: 珠子参总皂苷(100, 200 μg/mL)能显著改善心肌细胞活性,有效保护线粒体膜电位的稳定,抑制心肌细胞凋亡和改善细胞形态,降低细胞内活性氧(ROS)含量;下调Bax mRNA表达,上调Bcl-2 mRNA表达及Bcl-2与Bax的比值;降低H2O2所致新生大鼠心肌细胞中Caspase-3、Caspase-9的活性。结论: 珠子参总皂苷对H2O2诱导心肌细胞凋亡有显著的抑制作用,其机制可能与其稳定心肌细胞膜、清除ROS及调节心肌细胞Bcl-2、Bax和Caspase-3、Caspase-9表达有关。

关键词: 珠子参总皂苷, H2O2, 心肌细胞, 凋亡, Bcl-2, Bax, Caspase-3, Caspase-9

Abstract: AIM: To observe the inhibition effects of total saponin from Panacis majoris rhizoma on myocardial apoptosis of neonatal rat induced by H2O2 and its mechanism.METHODS: Oxidative stress-induced injury model was established with H2O2. Effects of total saponin from Panacis majoris rhizome (100, 200 μg/mL) on viability of cells and oxidative stress-induced apoptosis of cells were detected by MTT assay; Cell apoptosis rate and reactive oxygen species(ROS)content were detected by flow cytometry, the apoptosis cells morphous were observed by hoechst33258 through fluorescence microscope; The levels of Caspase-3, 9 were measured by detecting kits; Real-time polymerase chain reaction was applied to detect the mRNA expressions of Bcl-2 and Bax apoptosis-related genes.RESULTS: Total saponin from Panacis majoris rhizome (100, 200 μg/mL) might significantly increase cell viability and mitochondrial membrane potential, inhibit myocardial apoptosis, improve cell morphous, decrease intra-cellular ROS contents, down-regulate mRNA expression of Bax, up-regulate the mRNA expression of Bcl-2 and Bcl-2/Bax ratio, decrease activities of Caspase-3, 9, and with the dose of total saponin increasing, the aforesaid improvement became more and more strong.CONCLUSION: Total saponin from Panacis majoris rhizome could effectively inhibit myocardial apoptosis of neonatal rat induced by H2O2. The mechanism may be related to stabilizing mitochondrial membrane potential, scavenging of ROS, regulating the Caspase-3, 9, Bcl-2 and Bax expression levels.

Key words: Total saponin from Panacis majoris rhizome, H2O2, Cardiomyocytes, apoptosis, Bcl-2, Bax, Caspase-3, Caspase-9

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