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Abundance of d ‐2‐hydroxyglutarate in G2/M is determined by FOXM1 in mutant IDH1‐expressing cells
Author(s) -
Bala Bhaskara Rao Kancharana,
Katragunta Kumar,
Sarma Uma Maheswara,
Jain Nishant
Publication year - 2019
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1002/1873-3468.13500
Subject(s) - idh1 , mutant , isocitrate dehydrogenase , foxm1 , biology , wild type , enzyme , microbiology and biotechnology , transcription factor , biochemistry , gene
Isocitrate dehydrogenases (IDHs) are metabolic enzymes that are mutated in several cancers, resulting in overproduction of d ‐2‐hydroxyglutarate (D‐2HG). However, the signalling pathways and factors that regulate mutant IDHs or their metabolites remain elusive. Here, we report that in synchronized cells and cells treated with anti‐mitotic agents, wild‐type and mutant IDH proteins are induced maximally in G2/M. Moreover, mutant IDH1‐expressing cells arrested in G2/M harbour high D2HG levels. Genetic or pharmacological perturbation of Forkhead box protein M1 (FOXM1) abrogates the levels of IDH1 mRNA, protein and D2HG in G2/M. Conversely, overexpression of FOXM1 or hyperactive FOXM1 activates the IDH1 promoter and increases the abundance of its protein levels. In summary, our results show that in G2/M, higher D2HG levels are dependent on FOXM1‐mediated transcription of IDH1.