Please use this identifier to cite or link to this item: https://doi.org/10.1128/IAI.01332-13
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dc.titleAn ethA-ethR-deficient Mycobacterium bovis BCG mutant displays increased adherence to mammalian cells and greater persistence in vivo, which correlate with altered mycolic acid composition
dc.contributor.authorAng, M.L.T.
dc.contributor.authorSiti, Z.Z.R.
dc.contributor.authorShui, G.
dc.contributor.authorDianišková, P.
dc.contributor.authorMadacki, J.
dc.contributor.authorLin, W.
dc.contributor.authorKoh, V.H.Q.
dc.contributor.authorGomez, J.M.M.
dc.contributor.authorSudarkodi, S.
dc.contributor.authorBendt, A.
dc.contributor.authorWenk, M.
dc.contributor.authorMikušová, K.
dc.contributor.authorKorduláková, J.
dc.contributor.authorPethe, K.
dc.contributor.authorAlonso, S.
dc.date.accessioned2014-11-27T02:44:34Z
dc.date.available2014-11-27T02:44:34Z
dc.date.issued2014
dc.identifier.citationAng, M.L.T., Siti, Z.Z.R., Shui, G., Dianišková, P., Madacki, J., Lin, W., Koh, V.H.Q., Gomez, J.M.M., Sudarkodi, S., Bendt, A., Wenk, M., Mikušová, K., Korduláková, J., Pethe, K., Alonso, S. (2014). An ethA-ethR-deficient Mycobacterium bovis BCG mutant displays increased adherence to mammalian cells and greater persistence in vivo, which correlate with altered mycolic acid composition. Infection and Immunity 82 (5) : 1850-1859. ScholarBank@NUS Repository. https://doi.org/10.1128/IAI.01332-13
dc.identifier.issn10985522
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/110996
dc.description.abstractTuberculosis remains a major worldwide epidemic because of its sole etiological agent, Mycobacterium tuberculosis. Ethionamide (ETH) is one of the major antitubercular drugs used to treat infections with multidrug-resistant M. tuberculosis strains. ETH is a prodrug that requires activation within the mycobacterial cell; its bioactivation involves the ethA-ethR locus, which encodes the monooxygenase EthA, while EthR is a transcriptional regulator that binds to the intergenic promoter region of the ethA-ethR locus. While most studies have focused on the role of EthA-EthR in ETH bioactivation, its physiological role in mycobacteria has remained elusive, although a role in bacterial cell detoxification has been proposed. Moreover, the importance of EthA-EthR in vivo has never been reported on. Here we constructed and characterized an EthA-EthR-deficient mutant of Mycobacterium bovis BCG. Our results indicate that absence of the ethA-ethR locus led to greater persistence of M. bovis BCG in the mouse model of mycobacterial infection, which correlated with greater adherence to mammalian cells. Furthermore, analysis of cell wall lipid composition by thin-layer chromatography and mass spectrometry revealed differences between the ethA-ethR KO mutant and the parental strain in the relative amounts of α- and keto-mycolates. Therefore, we propose here that M. bovis BCG ethA-ethR is involved in the cell wall-bound mycolate profile, which impacts mycobacterial adherence properties and in vivo persistence. This study thus provides some experimental clues to the possible physiological role of ethA-ethR and proposes that this locus is a novel factor involved in the modulation of mycobacterial virulence. © 2014, American Society for Microbiology.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1128/IAI.01332-13
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentLIFE SCIENCES INSTITUTE
dc.description.doi10.1128/IAI.01332-13
dc.description.sourcetitleInfection and Immunity
dc.description.volume82
dc.description.issue5
dc.description.page1850-1859
dc.description.codenINFIB
dc.identifier.isiut000334666200012
Appears in Collections:Staff Publications

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