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中国防痨杂志 ›› 2009, Vol. 31 ›› Issue (11): 646-648.

• 论著 • 上一篇    下一篇

结核分枝杆菌耐利福平药物机理的初步研究

李洪敏;张广宇;杨楠;张霞;刘银萍;杨栗坤;孔祥瑞   

  1. 解放军第309医院结核临床试验室 北京 100091
  • 出版日期:2009-11-10 发布日期:2011-11-03
  • 基金资助:
    军队十一五重大专项课题项目(06Z056)

The preliminary study on rifampicin-resistant mechanism of Mycobacterium tuberculosis

Li Hongmin, Zhang Guangyu, Yang Nan, Zhang Xia, Liu Yinping, Yang Kunli, Kong Xiangrui   

  1. Tuberculosis Clinical Lab, the 309th Hospital of PLA,Beijing 100091, China
  • Online:2009-11-10 Published:2011-11-03

摘要: 目的通过诱导试验观察结核菌产生耐利福平药物的全过程,初步分析结核菌耐该药的机理。方法采用诱导试验、聚合酶链反应—单链构象多态性(PCR-SSCP)和序列分析,对经不同药物浓度传代培养后的结核菌强毒株(H37Rv)和36株临床耐药分离株进行分析。结果在诱导到第7代时,H37Rv的PCR-SSCP电泳出现异常,经测序证实在513位点发生基因突变。36株临床耐药分离株中有23株发生突变,为63.9% (23/36);其中有5株与诱导株基因突变位点相同。结论用药物不间断的刺激结核菌,是产生结核菌耐利福平药物的重要原因。

关键词: 分枝杆菌, 结核, 利福平, 抗药性, 细菌, 聚合酶链反应, 多态现象, 单链构象

Abstract: ObjectiveTo study the mechanism of drug resistance in M. tuberculosis. MethodsM. tuberculosis virulent strain (H37Rv) that was cultured in the different levels of rifampicin and 36 isolated strains with the Results of drug resistance were analyzed by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) and sequence analysis. ResultsThe 7th generation of strain H37Rv had abnormal PCR-SSCP profile, was confirmed rpoB gene mutation at codon 513 by DNA sequencing. Of 36 clinical isolates, 63.9% strains (23/36) had rpoB mutations. The mutation sites of 5 clinical isolates were the same as that of induced strains H37Rv. Conclusions Stimulating constantly tubercle bacillus with rifampicin is an important reason that cause rifampicin-resistant tuberculosis.

Key words: mycobacterium tuberculosis, rifampin, drug resistance,bacterial, polymerase chain reaction, polymorphism,single-stranded conformational