Isoniazid resistance without a loss of fitness in Mycobacterium tuberculosis.
Isoniazid resistance without a loss of fitness in Mycobacterium tuberculosis.
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DOI:
10.1038/ncomms1724
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发表时间:
2012-03-20
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
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The emergence of multi- and extensively drug-resistant tuberculosis (MDR-TB and XDR-TB, respectively) has intensified the critical public health implications of this global disease. The fitness of Mycobacterium tuberculosis (M.tb.) strains exhibiting MDR and XDR phenotypes is of fundamental importance in predicting whether the MDR-/XDR-TB epidemic will be sustained across the human population. Here we describe a potential mechanism of M.tb. resistance to the TB drug isoniazid conferred by loss of a sigma factor, SigI. We demonstrate that the gain of isoniazid resistance in the M.tb. ΔsigI mutant might not diminish the organism’s fitness for causing disease. These findings have significant implications when considering the ability of drug resistant M.tb. strains to initiate untreatable TB epidemics, as it is possible that loss or alteration of SigI function could play a role in the generation of MDR and XDR M.tb. strains of suitable fitness to spread in a community setting.
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影响因子:
64.8
作者:
ZHANG, Y;HEYM, B;COLE, S
通讯作者:
COLE, S
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Master, S;Zahrt, TC;Deretic, V
通讯作者:
Deretic, V
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3.1
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Manca, C;Paul, S;Kaplan, G
通讯作者:
Kaplan, G
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Tyagi R;Lai R;Duggleby RG
通讯作者:
Duggleby RG
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Lee, Jong-Hee;Karakousis, Petros C.;Bishai, William R.
通讯作者:
Bishai, William R.