Volume 11, Issue 4 (12-2023)                   JoMMID 2023, 11(4): 179-184 | Back to browse issues page

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Madadi-Goli N, Ahmadi K, Khanipour S, Pourazar Dizaji S, Nasehi M, Siadat S D, et al . Investigating the Mutations in atpE and Rv0678 Genes in Mycobacterium Tuberculosis Clinical Isolates. JoMMID 2023; 11 (4) :179-184
URL: http://jommid.pasteur.ac.ir/article-1-615-en.html
Investigating the Mutations in atpE and Rv0678 Genes in Mycobacterium Tuberculosis Clinical Isolates
Nahid Madadi-Goli , Kamal Ahmadi , Sharareh Khanipour , Shahin Pourazar Dizaji , Mahshid Nasehi , Seyed Davar Siadat , Farzam Vaziri , Abolfazl Fateh
1Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran, Iran; 2Microbiology Research Center (MRC), Pasteur Institute of Iran, Tehran, Iran
Abstract:   (604 Views)
Introduction: Tuberculosis (TB) caused by the bacterium Mycobacterium tuberculosis remains a critical global public health concern due to the high morbidity and mortality rates. Mutation in atpE and Rv0678 genes contributes to drug resistance in M. tuberculosis. This study investigates the antibiotic resistance patterns and mutations in atpE and Rv0678 genes in 22 M. tuberculosis clinical isolates. Methods: Drug susceptibility testing (DST) for rifampin, isoniazid, streptomycin, capreomycin, ofloxacin, kanamycin, and ethambutol was conducted using the proportional method. This was followed by determining the minimum inhibitory concentration (MIC) for bedaquiline (BDQ) via the microplate Alamar blue assay (MABA). Genomic regions encompassing atpE and Rv0678 genes were amplified and sequenced for mutation analysis. Data analysis was performed using SPSS software to interpret mutation patterns concerning drug susceptibility profiles. Results: Of 22 isolates, 5 (27.8%) were extensively drug-resistant tuberculosis (XDR-TB), and 13 (72.2%) were multi-drug resistant tuberculosis (MDR-TB). Resistance rates to kanamycin, ofloxacin, capreomycin, and streptomycin were 40.6%, 46.3%, 85%, and 74.6%, respectively. Additionally, phenotypic resistance to bedaquiline was observed in 12 (54.5%) isolates. Sequencing revealed no resistance-conferring mutations in the atpE or Rv0678 genes among the isolates. Conclusion: Our findings showed substantial resistance to first- and second-line drugs in M. tuberculosis clinical isolates. This highlights the necessity for ongoing, comprehensive studies to elucidate the evolving drug resistance patterns and understand the underlying mechanisms in clinical isolates.
Keywords: Mycobacterium tuberculosis, DST, atpE, Rv0678, Bedaquiline, Extensively drug-resistant tuberculosis (XDR-TB), Multi-drug resistant tuberculosis (MDR-TB)
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Type of Study: Original article | Subject: Anti-microbial agents, resistance and treatment protocols
Received: 2023/11/1 | Accepted: 2023/12/10 | Published: 2024/02/24
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.