RRC ID 45948
Author Cheng S, Wu Y, Lu Q, Yan J, Zhang H, Wang X.
Title Autophagy genes coordinate with the class II PI/PtdIns 3-kinase PIKI-1 to regulate apoptotic cell clearance in C. elegans.
Journal Autophagy
Abstract Phagocytosis and autophagy are two lysosome-mediated cellular degradation pathways designed to eliminate extracellular and intracellular constituents, respectively. Recent studies suggest that these two processes intersect. Several autophagy proteins have been shown to participate in clearance of apoptotic cells, but whether and how the autophagy pathway is involved is unclear. Here we showed that loss of function mutations in 19 genes acting at overlapping or distinct stages of autophagy caused increased numbers of cell corpses in C. elegans embryos. In contrast, genes that mediate specific clearance of P granules or protein aggregates through autophagy are dispensable for cell corpse removal. We showed that defective autophagy impairs phagosome maturation and that autophagy genes act in parallel to the class II phosphoinositide (PI)/phosphatidylinositol (PtdIns) 3-kinase PIKI-1 to regulate phagosomal PtdIns3P in a similar manner as VPS-34. Our data indicate that autophagy may coordinate with PIKI-1 to promote phagosome maturation, thus ensuring efficient clearance of apoptotic cells.
Volume 9(12)
Pages 2022-32
Published 2013-12
DOI 10.4161/auto.26323
PII 26323
PMID 24165672
MeSH Animals Apoptosis / genetics* Autophagy / genetics* Caenorhabditis elegans* / genetics Caenorhabditis elegans* / metabolism Caenorhabditis elegans Proteins / physiology* Class II Phosphatidylinositol 3-Kinases / physiology* Class III Phosphatidylinositol 3-Kinases / genetics Organisms, Genetically Modified Phagosomes / genetics Phagosomes / metabolism Phosphatidylinositol 3-Kinases / physiology* Signal Transduction / genetics
IF 11.059
Times Cited 12
C.elegans tm3948 tm3425