Hijacking multivesicular bodies enables long-term and exosome-mediated long-distance action of anthrax toxin.

Hijacking multivesicular bodies enables long-term and exosome-mediated long-distance action of anthrax toxin.
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劫持多个物体可以实现炭疽毒素的长期和外部介导的长距离作用。

DOI:
10.1016/j.celrep.2013.10.019
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发表时间:
2013-11-27
期刊:
影响因子:
8.8
通讯作者:
van der Goot FG
van der Goot FG
中科院分区:
生物学1区
文献类型:
--
作者:
Abrami L;Brandi L;Moayeri M;Brown MJ;Krantz BA;Leppla SH;van der Goot FG

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炭疽致死毒素是一种经典的AB型毒素,由两种成分组成,保护性抗原(PA)和致死因子(LF)。在这里,我们表明,以下的组装和内吞作用,PA形成一个通道,易位LF,不仅进入胞质溶胶,但也进入内腔的内体腔内囊泡(ILV)。这些ILV可以融合并将LF释放到胞质溶胶中,在胞质溶胶中LF可以蛋白水解并使宿主靶标失效。我们发现,LF可以持续在ILV数天,完全庇护蛋白水解降解,在体外和体内。在此期间,ILV定位的LF可以在细胞分裂时传递到子细胞。此外,含有LF的ILV可以作为外泌体递送到细胞外培养基中。这些可以将LF以独立于典型炭疽毒素受体运输途径的方式递送到幼稚细胞的胞质溶胶,同时免受免疫系统的中和细胞外因子的影响。
Anthrax Lethal Toxin is a classical AB-toxin comprised of two components, Protective Antigen (PA) and Lethal Factor (LF). Here we show that following assembly and endocytosis, PA forms a channel that translocates LF, not only into the cytosol, but also into the lumen of endosomal intraluminal vesicles (ILVs). These ILVs can fuse and release LF into the cytosol, where LF can proteolyze and disable host targets. We find that LF can persist in ILVs for days, fully sheltered from proteolytic degradation, both in vitro and in vivo. During this time ILV-localized LF can be transmitted to daughter cells upon cell division. In addition, LF-containing ILVs can be delivered to the extracellular medium as exosomes. These can deliver LF to the cytosol of naïve cells in a manner that is independent of the typical anthrax toxin-receptor trafficking pathway, while being sheltered from neutralizing extracellular factors of the immune system.
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期刊: Nature reviews. Molecular cell biology
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