Multiple toxin-antitoxin systems in Mycobacterium tuberculosis.

Multiple toxin-antitoxin systems in Mycobacterium tuberculosis.
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DOI:
10.3390/toxins6031002
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发表时间:
2014-03-06
期刊:
影响因子:
4.2
通讯作者:
Genevaux P
Genevaux P
中科院分区:
医学2区
文献类型:
--
作者:
Sala A;Bordes P;Genevaux P

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结核分枝杆菌的标志是它能够在宿主肉芽肿中长期存在,处于非复制和耐药状态,然后醒来引起疾病。迄今为止,细胞因子和介导进入持久阶段的分子机制知之甚少。值得注意的是,M。结核病在其染色体中具有非常高数量的毒素-抗毒素(TA)系统,总共79个,重组了已知的(68个)和新的(11个)家族,其中一些家族在耐药性持续者中被强烈诱导。与应激响应TA系统在其他细菌中产生持久菌的能力一致,有人提出M.结核病可能参与其发病机制。在此,我们回顾了目前的知识,在这种细菌中存在的多个TA家族,其机制,以及它们在生理和毒力方面的潜在作用。
The hallmark of Mycobacterium tuberculosis is its ability to persist for a long-term in host granulomas, in a non-replicating and drug-tolerant state, and later awaken to cause disease. To date, the cellular factors and the molecular mechanisms that mediate entry into the persistence phase are poorly understood. Remarkably, M. tuberculosis possesses a very high number of toxin-antitoxin (TA) systems in its chromosome, 79 in total, regrouping both well-known (68) and novel (11) families, with some of them being strongly induced in drug-tolerant persisters. In agreement with the capacity of stress-responsive TA systems to generate persisters in other bacteria, it has been proposed that activation of TA systems in M. tuberculosis could contribute to its pathogenesis. Herein, we review the current knowledge on the multiple TA families present in this bacterium, their mechanism, and their potential role in physiology and virulence.
广泛的噬菌体流产感染系统通过IV型毒素 - 抗毒素机制发挥作用。
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