PMID- 24239351 OWN - NLM STAT- MEDLINE DCOM- 20140819 LR - 20211021 IS - 2211-1247 (Electronic) VI - 5 IP - 4 DP - 2013 Nov 27 TI - Hijacking multivesicular bodies enables long-term and exosome-mediated long-distance action of anthrax toxin. PG - 986-96 LID - S2211-1247(13)00603-7 [pii] LID - 10.1016/j.celrep.2013.10.019 [doi] AB - 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 naive cells in a manner that is independent of the typical anthrax toxin receptor-mediated trafficking pathway, while being sheltered from neutralizing extracellular factors of the immune system. CI - Copyright (c) 2013 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Abrami, Laurence AU - Abrami L AD - Global Health Institute, Ecole Polytechnique Federale de Lausanne, Station 19, 1015 Lausanne, Switzerland. FAU - Brandi, Lucia AU - Brandi L FAU - Moayeri, Mahtab AU - Moayeri M FAU - Brown, Michael J AU - Brown MJ FAU - Krantz, Bryan A AU - Krantz BA FAU - Leppla, Stephen H AU - Leppla SH FAU - van der Goot, F Gisou AU - van der Goot FG LA - eng GR - R01 AI077703/AI/NIAID NIH HHS/United States GR - Z99 AI999999/Intramural NIH HHS/United States GR - 2R01 AI077703-05/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, N.I.H., Intramural PT - Research Support, Non-U.S. Gov't DEP - 20131114 PL - United States TA - Cell Rep JT - Cell reports JID - 101573691 RN - 0 (Antigens, Bacterial) RN - 0 (Bacterial Toxins) RN - 0 (Protein Subunits) RN - 0 (anthrax toxin) SB - IM MH - Animals MH - Antigens, Bacterial/pharmacology MH - Bacillus anthracis/pathogenicity MH - Bacterial Toxins/*pharmacokinetics/pharmacology MH - Cell Line MH - Cytosol/immunology/metabolism MH - Endocytosis MH - Exosomes/metabolism MH - Humans MH - Mice MH - Mice, Inbred C57BL MH - Multivesicular Bodies/*metabolism MH - Protein Subunits/metabolism MH - Protein Transport PMC - PMC3866279 MID - NIHMS532575 EDAT- 2013/11/19 06:00 MHDA- 2014/08/20 06:00 PMCR- 2013/12/17 CRDT- 2013/11/19 06:00 PHST- 2013/07/16 00:00 [received] PHST- 2013/10/01 00:00 [revised] PHST- 2013/10/11 00:00 [accepted] PHST- 2013/11/19 06:00 [entrez] PHST- 2013/11/19 06:00 [pubmed] PHST- 2014/08/20 06:00 [medline] PHST- 2013/12/17 00:00 [pmc-release] AID - S2211-1247(13)00603-7 [pii] AID - 10.1016/j.celrep.2013.10.019 [doi] PST - ppublish SO - Cell Rep. 2013 Nov 27;5(4):986-96. doi: 10.1016/j.celrep.2013.10.019. Epub 2013 Nov 14.