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中国临床药理学与治疗学 ›› 2005, Vol. 10 ›› Issue (9): 1015-1024.

• 研究原著 • 上一篇    下一篇

中华眼镜蛇毒组分CⅡ抗耐药K562/A02细胞作用机制的研究

左长清, 林振桃1, 孔天翰1   

  1. 广东医学院药理教研室, 湛江 524023, 广东;
    1广州医学院蛇毒研究所, 广州 510182, 广东
  • 收稿日期:2005-07-06 修回日期:2005-08-18 发布日期:2020-11-22
  • 通讯作者: 孔天翰,男,医学博士,教授,硕士生导师,研究方向:生物毒素研究开发。Tel:020-81340993 E-mail:kongth@sohu.com
  • 作者简介:左长清,男,药理学硕士,助教,研究方向:肿瘤药理学。Tel:0759-2388588-5 E-mail:chqz77@163.com

Study on mechanisms of circumventing multidrug-resistant human leukemia cell line K562/A02 by fraction CⅡ from Naja naja Actra Venom

ZUO Chang-qing, LIN Zhen-tao1, KONG Tian-han1   

  1. Department of Pharmacology, Guangdong Medical College, Zhanjiang 524023, Guangdong, China;
    1Guangzhou Research Institute of Snake Venom, Guangzhou Medical College, Guangzhou 510182, Guangdong, China
  • Received:2005-07-06 Revised:2005-08-18 Published:2020-11-22

摘要: 目的: 研究中华眼镜蛇毒组分C Ⅱ (FC ⅡNNAV) 对多药耐药白血病细胞K562/A02 的抑制作用及机制。方法: 应用MTT 法观察FC ⅡNNAV 体外对K562 和K562/A02 的毒性作用, 流式细胞仪法观察FC ⅡNNAV 体外对K562/A02 细胞P-gp, Bcl-2 蛋白表达的影响, 比色法检测Caspase-3 活性变化。结果: FC ⅡNNAV 对耐药K562/A02 及敏感K562 细胞均有抑制作用, IC50 分别为0.75±0.01 μg·ml-1 和0.67±0.11 μg·ml-1。流式细胞仪检测发现FC ⅡNNAV 能使K562/A02 细胞的P-gp, Bcl-2 蛋白表达明显下调;Caspase-3 活性明显增强。结论: FC ⅡNNAV 对细胞K562/A02 及细胞K562 均有较强的抑制作用, 且抑制作用与剂量呈正相关, FC ⅡNNAV 可能通过抑制K562/A02 细胞P-gp, Bcl-2 蛋白表达, 激活Caspase-3 活性而诱导K562/A02 细胞凋亡。

关键词: 蛇毒, 肿瘤, 多药耐药, 凋亡, P-糖蛋白

Abstract: AIM: To investigate the inhibitory effect of fraction C Ⅱ from Naja naja Actra Venom (FC Ⅱ NNAV) on multidrug-resistant human leukemia cell line K562/A02 and its mechanisms.METHODS: The cytotoxicity of FC ⅡNNAV on K562/A02 and k562 cells was measured by MTT assay.The protein expression of P-gp and Bcl-2 of K562/A02 was observed by flow cytometry. The activation of Caspase-3 was detected by colorimetric assay.RESULTS: FC ⅡNNAV had the inhibitory effect on K562/A02 and K562.The values of IC50 were 0.75±0.01 and 0.67±0.11 μg·ml-1, respectively.The expression of P-gp and Bcl-2 decreased after application of FC Ⅱ NNAV and Caspase-3 was activated by FC Ⅱ NNAV.CONCLUSION: FC ⅡNNAV has the inhibitory effect on K562/A02 and K562.FC ⅡNNAV can induce K562/A02 cell apoptosis through down-regulation expression of P-gp and Bcl-2 and activating Caspase-3.

Key words: snake venom, neoplasm, multidrug resistance, apoptosis, P-glycoprotein

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