Hypoxia Induces Production of L-2-Hydroxyglutarate.

Autor:	Intlekofer AM; Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Dematteo RG; Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Venneti S; Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA., Finley LW; Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Lu C; Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Judkins AR; Department of Pathology and Laboratory Medicine, Children's Hospital Los Angeles and Keck School of Medicine, University of Southern California, Los Angeles, CA 90027, USA., Rustenburg AS; Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Grinaway PB; Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Chodera JD; Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Cross JR; The Donald B. and Catherine C. Marron Cancer Metabolism Center, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA., Thompson CB; Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA. Electronic address: thompsonc@mskcc.org.
Jazyk:	angličtina
Zdroj:	Cell metabolism [Cell Metab] 2015 Aug 04; Vol. 22 (2), pp. 304-11. Date of Electronic Publication: 2015 Jul 23.
DOI:	10.1016/j.cmet.2015.06.023
Abstrakt:	Somatic mutations in isocitrate dehydrogenase 1 or 2 (IDH1/2) contribute to the pathogenesis of cancer via production of the "oncometabolite" D-2-hydroxyglutarate (D-2HG). Elevated D-2HG can block differentiation of malignant cells by functioning as a competitive inhibitor of α-ketoglutarate (α-KG)-dependent enzymes, including Jumonji family histone lysine demethylases. 2HG is a chiral molecule that can exist in either the D-enantiomer or the L-enantiomer. Although cancer-associated IDH1/2 mutants produce D-2HG, biochemical studies have demonstrated that L-2HG also functions as a potent inhibitor of α-KG-dependent enzymes. Here we report that under conditions of oxygen limitation, mammalian cells selectively produce L-2HG via enzymatic reduction of α-KG. Hypoxia-induced L-2HG is not mediated by IDH1 or IDH2, but instead results from promiscuous substrate usage primarily by lactate dehydrogenase A (LDHA). During hypoxia, the resulting increase in L-2HG is necessary and sufficient for the induction of increased methylation of histone repressive marks, including histone 3 lysine 9 (H3K9me3). (Copyright © 2015 Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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