Mycobacterium tuberculosis evades macrophage defenses by inhibiting plasma membrane repair.
Mycobacterium tuberculosis evades macrophage defenses by inhibiting plasma membrane repair.
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Induction of macrophage necrosis is an important strategy used by virulent Mycobacterium tuberculosis (Mtb) to avoid innate host defense. In contrast, attenuated Mtb causes apoptosis, which limits bacterial replication and promotes T cell cross priming by antigen presenting cells. Here we demonstrated that Mtb infection causes plasma membrane microdisruptions. Resealing of these lesions—a process crucial for preventing necrosis and promoting apoptosis—required the translocation of lysosome and Golgi apparatus-derived vesicles to the plasma membrane. Plasma membrane repair depended on prostaglandin E2 (PGE2), which regulates synaptotagmin 7, the Ca++ sensor involved in the lysosome-mediated repair mechanism. By inducing production of lipoxin A4 (LXA4), which blocks PGE2 biosynthesis, virulent Mtb prevented membrane repair and induced necrosis. Thus, virulent Mtb impairs macrophage plasma membrane repair to evade host defenses.
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DOI:
10.1084/jem.20080767
发表时间:
2008-11-24
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Chen M;Divangahi M;Gan H;Shin DS;Hong S;Lee DM;Serhan CN;Behar SM;Remold HG
通讯作者:
Remold HG
影响因子:
3.5
作者:
Herb, Florian;Thye, Thorsten;Meyer, Christian G.
通讯作者:
Meyer, Christian G.
影响因子:
4.8
作者:
Haynes, LP;Thomas, GMH;Burgoyne, RD
通讯作者:
Burgoyne, RD
影响因子:
4.8
作者:
Fujino, H;Xu, W;Regan, JW
通讯作者:
Regan, JW
影响因子:
15.9
作者:
Hinchey, Joseph;Lee, Sunhee;Porcelli, Steven A.
通讯作者:
Porcelli, Steven A.