Enriched whole genome sequencing identified compensatory mutations in the RNA polymerase gene of rifampicin-resistant Mycobacterium leprae strains

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2018
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Abstract
Enriched whole genome sequencing identified compensatory mutations in the RNA polymerase gene of rifampicin-resistant Mycobacterium leprae strains Mallika Lavania,1 Itu Singh,1 Ravindra P Turankar,1 Anuj Kumar Gupta,2 Madhvi Ahuja,1 Vinay Pathak,1 Utpal Sengupta,1 1Stanley Browne Laboratory, The Leprosy Mission Trust India, TLM Community Hospital Nand Nagari, 2Agilent Technologies India Pvt Ltd, Jasola District Centre, New Delhi, India Abstract: Despite more than three decades of multidrug therapy (MDT), leprosy remains a major public health issue in several endemic countries, including India. The emergence of drug resistance in Mycobacterium leprae (M. leprae) is a cause of concern and poses a threat to the leprosy-control program, which might ultimately dampen the achievement of the elimination program of the country. Rifampicin resistance in clinical strains of M. leprae are supposed to arise from harboring bacterial strains with mutations in the 81-bp rifampicin resistance determining region (RRDR) of the rpoB gene. However, complete dynamics of rifampicin resistance are not explained only by this mutation in leprosy strains. To understand the role of other compensatory mutations and transmission dynamics of drug-resistant leprosy, a genome-wide sequencing of 11 M. leprae strains – comprising five rifampicin-resistant strains, five sensitive strains, and one reference strain – was done in this study. We observed the presence of compensatory mutations in two rifampicin-resistant strains in rpoC and mmpL7 genes, along with rpoB, that may additionally be responsible for conferring resistance in those strains. Our findings support the role for compensatory mutation(s) in RNA polymerase gene(s), resulting in rifampicin resistance in relapsed leprosy patients. Keywords: leprosy, rifampicin resistance, compensatory mutations, next generation sequencing, relapsed, MDT, India
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mallika2018enrichedinfection Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Mallika Lavania;Itu Singh;Ravindra P Turankar;Anuj Kumar Gupta;Madhvi Ahuja;Vinay Pathak;Utpal Sengupta and
Journal Infection and drug resistance
Year 2018
DOI
10.2147/IDR.S152082
URL
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