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Chinese Journal of Antituberculosis ›› 2022, Vol. 44 ›› Issue (4): 354-361.doi: 10.19982/j.issn.1000-6621.20210573

• Original Articles • Previous Articles     Next Articles

Analysis of gene mutation characteristics of isoniazid-resistant Mycobacterium tuberculosis in China

TIAN Li, ZHOU Wei, HUANG Xing, WU Xian-wei, ZHANG Hui-yong, LU Zhen-hui, ZHANG Shao-yan()   

  1. Institute of Respiratory Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200030, China
  • Received:2021-09-26 Online:2022-04-10 Published:2022-04-06
  • Contact: ZHANG Shao-yan E-mail:zhangshaoyan000@163.com
  • Supported by:
    Thirteen Five-Year Major National Science and Technology Projects for Infectious Diseases(2018ZX10725-509);The Task-Level Program of Thirteen Five-Year Major National Science and Technology Projects for Infectious Diseases(2018ZX10725-509-002-002)

Abstract:

Objective: To clarify the gene mutation characteristics of isoniazid (INH)-resistant Mycobacterium tuberculosis in China. Methods: We searched for literatures on INH-resistant gene mutations of Mycobacterium tuberculosis in China in PubMed, CNKI, Wanfang, and Weipu databases, and then conducted integrated analysis on mutation points and types of mutations, and numbers of amino acid changes reported in the literatures. Results: A total of 69 Chinese and English literatures were included with data of 6393 strains of isoniazid-resistant Mycobacterium tuberculosis within which 95.71% (6119/6393) had gene mutations or deletions. Among them, katG, inhA, and ahpC were most frequently observed mutation genes, accounting for 77.57% (4959/6393), 15.20% (972/6393), 3.69% (236/6393) of all strains respectively. Single gene single point mutations accounted for 87.80% (5613/6393), and combined mutations accounted for 12.20% (780/6393). katG315, katG463 and inhA15 mutations accounted for 56.22% (3594/6393), 10.03% (641/6393) and 10.10% (646/6393) of all strains respectively. The most common form of mutation was C→T, accounting for about 10.03% (641/6393). Conclusion: The most common mutated genes of isoniazid-resistant Mycobacterium tuberculosis were katG, inhA, ahpC, while the most mutated codons were katG315, katG463, inhA15 in China.

Key words: Mycobacterium tuberculosis, Isoniazid, Drug resistance,tuberculosis, Genotype

CLC Number: