Genetic mutations underlying isoniazid-resistant Mycobacterium tuberculosis in Khyber Pakhtunkhwa, Pakistan

被引:5
作者
Khan, Anwar Sheed [1 ]
Phelan, Jody E. [2 ]
Khan, Muhammad Tahir [3 ]
Ali, Sajid [4 ]
Qasim, Muhammad [1 ]
Mohammad, Noor [1 ]
Napier, Gary [2 ]
Ahmad, Sajjad [5 ]
Alam, Jamshed [6 ]
Khattak, Baharullah [1 ]
Campino, Susana [2 ]
Clark, Taane G. [2 ,7 ,8 ,9 ]
Khan, Taj Ali [5 ,10 ]
机构
[1] Kohat Univ Sci & Technol, Dept Microbiol, Kohat, Pakistan
[2] Prov TB Reference Lab, Hayatabad Med Complex, , Khyber Pakhtunkhwa, Peshawar, Pakistan
[3] London Sch Hyg & Trop Med, Fac Infect & Trop Dis, London, England
[4] Univ Lahore, Inst Mol Biol & Biotechnol, Lahore 58810, Pakistan
[5] Bacha Khan Univ, Dept Microbiol, Charsadda, Pakistan
[6] Khyber Med Univ, Inst Inst Pathol & Diagnost Med, Peshawar, Pakistan
[7] Peshawar Inst Cardiol, Peshawar, Pakistan
[8] London Sch Hyg & Trop Med, Fac Epidemiol & Populat Hlth, London, England
[9] London Sch Hyg & Trop Med, London, England
[10] Khyber Med Univ, Peshawar, Pakistan
基金
英国医学研究理事会; 英国生物技术与生命科学研究理事会;
关键词
D O I
10.1016/j.tube.2022.102286
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Tuberculosis, caused by Mycobacterium tuberculosis, is a major public health issue in Pakistan. Isoniazid is a first-line pro-drug that requires activation through an enzyme called catalase peroxidase, but is subject to widespread resistance, driven by mutations in katG and inhA genes and other loci with compensatory effects (e.g., ahpC). Here, we used whole genome sequencing data from 51 M. tuberculosis isolates collected from Khyber Pakhtunkhwa province (years 2016-2019; all isoniazid phenotypically resistant) to investigate the genetic diversity of mutations in isoniazid candidate genes. The most common mutations underlying resistance were katG S315T (37/51), fabG1-15C>T (13/51; inhA promoter), and inhA-154G>A (7/51). Other less common mutations (n < 5) were also identified in katG (R128Q, V1A, W505*, A109T, D311G) and candidate compensatory genes ahpC (-54C>T, -51G>A) and oxyS (M249T). Using DynaMut2 software, the mutants exhibited various degrees of stability and flexibility on protein structures, with some katG mutations leading to a decrease in KatG protein flexibility. Overall, the characterisation of circulating isoniazid resistant-linked mutations will assist in drug resistant TB management and control activities in a highly endemic area of Pakistan.
引用
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页数:5
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