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中国药学(英文版)

• 【研究论文】 • 上一篇    下一篇

反向分子对接应用于黄曲霉素B1毒性机制及药物Oltipraz靶点的探究

张裕, 郭丽梅*   

  1. 北京大学医学部 基础医学院 病理学系, 北京 100191  
  • 收稿日期:2013-11-19 修回日期:2013-12-06 出版日期:2014-03-13 发布日期:2013-12-25
  • 通讯作者: *Corresponding author. Tel.: 86-10-82802561; E-mail: guolimei@bjmu.edu.cn
  • 作者简介:*Corresponding author. Tel.: 86-10-82802561; E-mail: guolimei@bjmu.edu.cn

Exploration of the mechanisms of Aflatoxin B1 toxicity and the targets of Oltipraz by reverse docking

Yu Zhang, Limei Guo*   

  1. Department of Pathology, School of Basic Medical Science, Peking University Health Science Center, Beijing 100191, China
  • Received:2013-11-19 Revised:2013-12-06 Online:2014-03-13 Published:2013-12-25
  • Contact: *Corresponding author. Tel.: 86-10-82802561; E-mail: guolimei@bjmu.edu.cn
  • About author:*Corresponding author. Tel.: 86-10-82802561; E-mail: guolimei@bjmu.edu.cn

摘要:

研究旨在探究黄曲霉素B1的作用靶点, 以探讨其致毒机理, 并分析药物Oltipraz的减毒机制, 为更好地防黄曲霉素中毒提供依据。本研究采用反向分子对接的方法, 使用了3个在线反向分子对接服务平台预测黄曲霉B1, Oltipraz可能的作用靶点, 综合分析所得结果, 结合黄曲霉素中毒的临床表征对结果进行分析。黄曲霉素B1的对接结果表明AFB可能通过作用于细胞凋亡、激素代谢、免疫调节等过程中的相关蛋白扰乱了机体的正常功能, 以及通过作用于组织特异性的蛋白造成肝、肾、胃等器官毒性。另外, 药物Oltipraz的对接结果表明, Oltipraz可能一方面通过抑制AFB产生毒性的生物转化过程, 另一方面通过拮抗多个黄曲霉素可能作用的靶点产生减毒作用。本研究用反向分子对接的方法系统而有效地预测了黄曲霉素B1和药物Oltipraz的靶点, 为研发更有效的抗黄曲霉毒素的药物提供了一定依据。

关键词: 反向分子对接, 黄曲霉素B1, 奥替普拉

Abstract:

Aflatoxin B1 toxicity is well known but the mechanism of this toxicity is still unclear. In addition, the target of the anti-aflatoxin chemopreventive drug Oltipraz remains to be identified. In this study, we employed computer aided reverse docking analysis to identify putative targets of Aflatoxin B1 (AFB) and Oltipraz. The results showed that the clinically known toxic effects of AFB are related to this molecule’s strong binding affinity for key proteins involved in cell apoptosis, hormone metabolism,immune suppression, and digestive organ function. In addition, virtual binding assay indicated that Oltipraz neutralizes the toxicity of AFB by inhibiting its biotransformation enzymes. In conclusion, the technique of reverse docking may be used to identify the specific targets of AFB and Oltipraz, and our findings could significantly accelerate the mechanistic studies of the two molecules and provide guidance for the development of anti-AFB drugs.

Key words: Reverse docking, Aflatoxin B1, Oltipraz

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