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2-Hydroxyglutarate Inhibits ATP Synthase and mTOR Signaling #MMPMID26190651
Fu X; Chin RM; Vergnes L; Hwang H; Deng G; Xing Y; Pai MY; Li S; Ta L; Fazlollahi F; Chen C; Prins RM; Teitell MA; Nathanson DA; Lai A; Faull KF; Jiang M; Clarke SG; Cloughesy TF; Graeber TG; Braas D; Christofk HR; Jung ME; Reue K; Huang J
Cell Metab 2015[Sep]; 22 (3): 508-15 PMID26190651show ga
Recently we discovered that the central metabolite ?-ketoglutarate (?-KG) extends lifespan in C. elegans through inhibition of ATP synthase and TOR signaling. Unexpectedly, here we find that (R)-2-hydroxyglutarate ((R)-2HG), an oncometabolite that interferes with various ?-KG mediated processes, extends worm lifespan similarly. (R)-2HG accumulates in human cancers carrying neomorphic mutations in the isocitrate dehydrogenase (IDH) 1 and 2 genes. We show that, like ?-KG, both (R)-2HG and (S)-2HG bind and inhibit ATP synthase, and inhibit mTOR signaling; these effects are mirrored in IDH1 mutant cells, suggesting a growth suppressive function of (R)-2HG. Consistently, inhibition of ATP synthase by 2-HG or ?-KG in glioblastoma cells is sufficient for growth arrest and tumor cell killing under conditions of glucose limitation, such as when ketone bodies (instead of glucose) are supplied for energy. These findings inform therapeutic strategies and open avenues for investigating the roles of 2-HG and metabolites in biology and disease.