Phosphoglycerate Mutase 1 Activates DNA Damage Repair via Regulation of WIP1 Activity

Shigeo Ohba, Tor Christian Aase Johannessen, Kamalakar Chatla, Xiaodong Yang, Russell O. Pieper, Joydeep Mukherjee

Research output: Contribution to journalArticle

Abstract

The metabolic enzyme phosphoglycerate mutase 1 (PGAM1) is overexpressed in several types of cancer, suggesting an additional function beyond its established role in the glycolytic pathway. We here report that PGAM1 is overexpressed in gliomas where it increases the efficiency of the DNA damage response (DDR) pathway by cytoplasmic binding of WIP1 phosphatase, thereby preventing WIP1 nuclear translocation and subsequent dephosphorylation of the ATM signaling pathway. Silencing of PGAM1 expression in glioma cells consequently decreases formation of γ-H2AX foci, increases apoptosis, and decreases clonogenicity following irradiation (IR) and temozolomide (TMZ) treatment. Furthermore, mice intracranially implanted with PGAM1-knockdown cells have significantly improved survival after treatment with IR and TMZ. These effects are counteracted by exogenous expression of two kinase-dead PGAM1 mutants, H186R and Y92F, indicating an important non-enzymatic function of PGAM1. Our findings identify PGAM1 as a potential therapeutic target in gliomas.

Original languageEnglish
Article number107518
JournalCell Reports
Volume31
Issue number2
DOIs
Publication statusPublished - 14-04-2020

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)

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    Ohba, S., Johannessen, T. C. A., Chatla, K., Yang, X., Pieper, R. O., & Mukherjee, J. (2020). Phosphoglycerate Mutase 1 Activates DNA Damage Repair via Regulation of WIP1 Activity. Cell Reports, 31(2), [107518]. https://doi.org/10.1016/j.celrep.2020.03.082