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J Biol Chem. 2008 Apr 18;283(16):10892-903. doi: 10.1074/jbc.M800102200. Epub 2008 Feb 15.

Mitochondrial autophagy is an HIF-1-dependent adaptive metabolic response to hypoxia.

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  • 1Vascular Program, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.

Abstract

Autophagy is a process by which cytoplasmic organelles can be catabolized either to remove defective structures or as a means of providing macromolecules for energy generation under conditions of nutrient starvation. In this study we demonstrate that mitochondrial autophagy is induced by hypoxia, that this process requires the hypoxia-dependent factor-1-dependent expression of BNIP3 and the constitutive expression of Beclin-1 and Atg5, and that in cells subjected to prolonged hypoxia, mitochondrial autophagy is an adaptive metabolic response which is necessary to prevent increased levels of reactive oxygen species and cell death.

PMID:
18281291
[PubMed - indexed for MEDLINE]
PMCID:
PMC2447655
Free PMC Article
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