Journal of Antimicrobial Chemotherapy 2014-12-01

Kinetics of recA and recX induction in drug-susceptible and MDR clinical strains of Mycobacterium tuberculosis.

Purva Bhatter, Anirvan Chatterjee, Nerges Mistry

文献索引：J. Antimicrob. Chemother. 69(12) , 3199-202, (2014)

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摘要

To investigate and compare the expression of recA and recX, components of the SOS pathway, following rifampicin treatment in drug-susceptible and MDR clinical strains of Mycobacterium tuberculosis.Strains (M. tuberculosis and Mycobacterium smegmatis) were subjected to rifampicin- and mitomycin-induced stress for 36 h followed by RNA extraction. recA and recX in the RNA extract were estimated using qRT-PCR.The MDR clinical strain induced faster (24 h) and higher (7-fold) levels of recA as compared with the drug-susceptible strain (36 h) in response to rifampicin. recX levels were found to rise with an increase in levels of recA; however, the levels were relatively higher than recA.Drug-susceptible and MDR strains have different kinetics of induction of DNA repair.© The Author 2014. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

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