期刊
LEUKEMIA
卷 30, 期 8, 页码 1708-1715出版社
SPRINGERNATURE
DOI: 10.1038/leu.2016.71
关键词
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资金
- Braukmann-Wittenberg-Herz-Stiftung
- Deutsche Forschungsgemeinschaft
- ERC grant under the European Union's Horizon research and innovation program [638035]
- Deutsche Krebshilfe [110284, 110287, 110292, 111267]
- Deutsche Jose Carreras Leukamie-Stiftung eV [DJCLS R13/14]
- German Federal Ministry of Education and Research Grant [01EO0802]
- DFG Grant [HE 5240/5-1, HE 5240/6-1]
- Dieter-Schlag Stiftung
- HiLF grant from Hannover Medical School awarded
- European Research Council (ERC) [638035] Funding Source: European Research Council (ERC)
Canonical mutations in IDH1 and IDH2 produce high levels of the R-enantiomer of 2-hydroxyglutarate (R-2HG), which is a competitive inhibitor of alpha-ketoglutarate (alpha KG)-dependent enzymes and a putative oncometabolite. Mutant IDH1 collaborates with HoxA9 to induce monocytic leukemia in vivo. We used two mouse models and a patient-derived acute myeloid leukemia xenotransplantation (PDX) model to evaluate the in vivo transforming potential of R-2HG, S-2HG and aKG independent of the mutant IDH1 protein. We show that R-2HG, but not S-2HG or aKG, is an oncometabolite in vivo that does not require the mutant IDH1 protein to induce hyperleukocytosis and to accelerate the onset of murine and human leukemia. Thus, circulating R-2HG acts in a paracrine manner and can drive the expansion of many different leukemic and preleukemic clones that may express wild-type IDH1, and therefore can be a driver of clonal evolution and diversity. In addition, we show that the mutant IDH1 protein is a stronger oncogene than R-2HG alone when comparable intracellular R-2HG levels are achieved. We therefore propose R-2HG independent oncogenic functions of mutant IDH1 that may need to be targeted in addition to R-2HG production to exploit the full therapeutic potential of IDH1 inhibition.
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