Autophagy in cell death: an innocent convict?
Beth Levine, Junying Yuan
Beth Levine, Junying Yuan
Published October 3, 2005
Citation Information: J Clin Invest. 2005;115(10):2679-2688. https://doi.org/10.1172/JCI26390.
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Review Series

Autophagy in cell death: an innocent convict?

Abstract

The visualization of autophagosomes in dying cells has led to the belief that autophagy is a nonapoptotic form of programmed cell death. This concept has now been evaluated using cells and organisms deficient in autophagy genes. Most evidence indicates that, at least in cells with intact apoptotic machinery, autophagy is primarily a pro-survival rather than a pro-death mechanism. This review summarizes the evidence linking autophagy to cell survival and cell death, the complex interplay between autophagy and apoptosis pathways, and the role of autophagy-dependent survival and death pathways in clinical diseases.

Authors

Beth Levine, Junying Yuan

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The molecular mechanisms of autophagy. The autophagy (Atg) proteins can ...
The molecular mechanisms of autophagy. The autophagy (Atg) proteins can be divided into 4 functional groups, including (A) a protein kinase autophagy regulatory complex that responds to upstream signals, including nutrient limitation; (B) a lipid kinase signaling complex that mediates vesicle nucleation; (C) ubiquitin-like protein conjugation pathways that are required for vesicle expansion and completion; and (D) a retrieval pathway required for the disassembly of Atg protein complexes from matured autophagosomes. Shown are the yeast Atg proteins that participate in each functional group. Yeast Atg proteins with known orthologs in higher eukaryotes are underlined. PI, phosphatidylinositol; PI3-P, phosphatidylinositol 3-phosphate; PE, phosphatidylethanolamine.