Macroautophagy/autophagy is a fundamental intracellular degradation process with multiple roles in immunity, including direct elimination of intracellular microorganisms via 'xenophagy.' In this review, we summarize studies from the fruit fly Drosophila melanogaster and the nematode Caenorhabditis elegans that highlight the roles of autophagy in innate immune responses to viral, bacterial, and fungal pathogens. Research from these genetically tractable invertebrates has uncovered several conserved immunological paradigms, such as direct targeting of intracellular pathogens by xenophagy and regulation of autophagy by pattern recognition receptors in D. melanogaster. Although C. elegans has no known pattern recognition receptors, this organism has been particularly useful in understanding many aspects of innate immunity. Indeed, work in C. elegans was the first to show xenophagic targeting of microsporidia, a fungal pathogen that infects all animals, and to identify TFEB/HLH-30, a helix-loop-helix transcription factor, as an evolutionarily conserved regulator of autophagy gene expression and host tolerance. Studies in C. elegans have also highlighted the more recently appreciated relationship between autophagy and tolerance to extracellular pathogens. Studies of simple, short-lived invertebrates such as flies and worms will continue to provide valuable insights into the molecular mechanisms by which autophagy and immunity pathways intersect and their contribution to organismal survival. Abbreviations Atg autophagy related BECN1 Beclin 1 CALCOCO2 calcium binding and coiled-coil domain 2 Cry5B crystal toxin 5B Daf abnormal dauer formation DKF-1 D kinase family-1 EPG-7 Ectopic P Granules-7 FuDR fluorodeoxyuridine GFP green fluorescent protein HLH-30 Helix Loop Helix-30 Imd immune deficiency ins-18 INSulin related-18; LET-363, LEThal-363 lgg-1 LC3, GABARAP and GATE-16 family-1 MAPK mitogen-activated protein kinase MATH the meprin and TRAF homology MTOR mechanistic target of rapamycin NBR1 neighbor of BRCA1 gene 1 NFKB nuclear factor of kappa light polypeptide gene enhancer in B cells NOD nucleotide-binding oligomerization domain containing OPTN optineurin PAMPs pathogen-associated molecular patterns Park2 Parkinson disease (autosomal recessive, juvenile) 2, parkin pdr-1 Parkinson disease related PFTs pore-forming toxins PGRP peptidoglycan-recognition proteins PIK3C3 phosphatidylinositol 3- kinase catalytic subunit type 3 pink-1 PINK (PTEN-I induced kinase) homolog PRKD protein kinase D; PLC, phospholipase C PRKN parkin RBR E3 ubiquitin protein ligase PRRs pattern-recognition receptors PtdIns3P phosphatidylinositol-3-phosphate rab-5 RAB family-5 RB1CC1 RB1-inducible coiled-coil 1 RNAi RNA interference sqst SeQueSTosome related SQSTM1 sequestosome 1 TBK1 TANK-binding kinase 1 TFEB transcription factor EB TGFB/TGF-β transforming growth factor beta TLRs toll-like receptors unc-51 UNCoordinated-51 VPS vacuolar protein sorting; VSV, vesicular stomatitis virus VSV-G VSV surface glycoprotein G Wipi2 WD repeat domain, phosphoinositide interacting 2.

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   |area=    RapamycinFungusV1
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   |étape=   Exploration
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   |clé=     pubmed:29130360
   |texte=   Autophagy and innate immunity: Insights from invertebrate model organisms.
}}

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