Leishmania amazonensis Engages CD36 to Drive Parasitophorous Vacuole Maturation
Authors
Okuda, KendiTong, Mei
Dempsey, Brian
Moore, Kathryn J.
Gazzinelli, Ricardo T.
Silverman, Neal S.
UMass Chan Affiliations
Department of Medicine, Division of Infectious Diseases and ImmunologyDocument Type
Journal ArticlePublication Date
2016-06-09
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Leishmania amastigotes manipulate the activity of macrophages to favor their own success. However, very little is known about the role of innate recognition and signaling triggered by amastigotes in this host-parasite interaction. In this work we developed a new infection model in adult Drosophila to take advantage of its superior genetic resources to identify novel host factors limiting Leishmania amazonensis infection. The model is based on the capacity of macrophage-like cells, plasmatocytes, to phagocytose and control the proliferation of parasites injected into adult flies. Using this model, we screened a collection of RNAi-expressing flies for anti-Leishmania defense factors. Notably, we found three CD36-like scavenger receptors that were important for defending against Leishmania infection. Mechanistic studies in mouse macrophages showed that CD36 accumulates specifically at sites where the parasite contacts the parasitophorous vacuole membrane. Furthermore, CD36-deficient macrophages were defective in the formation of the large parasitophorous vacuole typical of L. amazonensis infection, a phenotype caused by inefficient fusion with late endosomes and/or lysosomes. These data identify an unprecedented role for CD36 in the biogenesis of the parasitophorous vacuole and further highlight the utility of Drosophila as a model system for dissecting innate immune responses to infection.Source
PLoS Pathog. 2016 Jun 9;12(6):e1005669. doi: 10.1371/journal.ppat.1005669. eCollection 2016. Link to article on publisher's site
DOI
10.1371/journal.ppat.1005669Permanent Link to this Item
http://hdl.handle.net/20.500.14038/40019PubMed ID
27280707Related Resources
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Copyright © 2016 Okuda et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Distribution License
http://creativecommons.org/licenses/by/4.0/ae974a485f413a2113503eed53cd6c53
10.1371/journal.ppat.1005669
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Except where otherwise noted, this item's license is described as Copyright © 2016 Okuda et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.