Oncometabolite D-2-Hydroxyglutarate Inhibits ALKBH DNA Repair Enzymes and Sensitizes IDH Mutant Cells to Alkylating Agents

Pu Wang, Jing Wu, Shenghong Ma, Lei Zhang, Jun Yao, Katherine A. Hoadley, Matthew D. Wilkerson, Charles M. Perou, Kun Liang Guan*, Dan Ye, Yue Xiong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

142 Scopus citations

Abstract

Chemotherapy of a combination of DNA alkylating agents, procarbazine and lomustine (CCNU), and a microtubule poison, vincristine, offers a significant benefit to a subset of glioma patients. The benefit of this regimen, known as PCV, was recently linked to IDH mutation that occurs frequently in glioma and produces D-2-hydroxyglutarate (D-2-HG), a competitive inhibitor of α-ketoglutarate (α-KG). We report here that D-2-HG inhibits the α-KG-dependent alkB homolog (ALKBH) DNA repair enzymes. Cells expressing mutant IDH display reduced repair kinetics, accumulate more DNA damages, and are sensitized to alkylating agents. The observed sensitization to alkylating agents requires the catalytic activity of mutant IDH to produce D-2-HG and can be reversed by the deletion of mutant IDH allele or overexpression of ALKBH2 or AKLBH3. Our results suggest that impairment of DNA repair may contribute to tumorigenesis driven by IDH mutations and that alkylating agents may merit exploration for treating IDH-mutated cancer patients.

Original languageEnglish
Pages (from-to)2353-2361
Number of pages9
JournalCell Reports
Volume13
Issue number11
DOIs
StatePublished - 22 Dec 2015
Externally publishedYes

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