Mechanical morphotype switching as an adaptive response in mycobacteria.

Mechanical morphotype switching as an adaptive response in mycobacteria.
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机械形态转换作为分枝杆菌的适应性反应。

DOI:
10.1126/sciadv.adh7957
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发表时间:
2024-01-05
期刊:
影响因子:
13.6
通讯作者:
Javid, Babak
Javid, Babak
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Eskandarian, Haig Alexander;Chen, Yu-Xiang;Toniolo, Chiara;Belardinelli, Juan M.;Palcekova, Zuzana;Hom, Lesley;Ashby, Paul D.;Fantner, Georg E.;Jackson, Mary;Mckinney, John D.;Javid, Babak

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Invading microbes face a myriad of cidal mechanisms of phagocytes that inflict physical damage to microbial structures. How intracellular bacterial pathogens adapt to these stresses is not fully understood. Here, we report the discovery of a virulence mechanism by which changes to the mechanical stiffness of the mycobacterial cell surface confer refraction to killing during infection. Long-term time-lapse atomic force microscopy was used to reveal a process of “mechanical morphotype switching” in mycobacteria exposed to host intracellular stress. A “soft” mechanical morphotype switch enhances tolerance to intracellular macrophage stress, including cathelicidin. Both pharmacologic treatment, with bedaquiline, and a genetic mutant lacking uvrA modified the basal mechanical state of mycobacteria into a soft mechanical morphotype, enhancing survival in macrophages. Our study proposes microbial cell mechanical adaptation as a critical axis for surviving host-mediated stressors. Mycobacterial mechanical morphotype switching enhances survival during macrophage infection.
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