Control of topoisomerase II activity and chemotherapeutic inhibition by TCA cycle metabolites

Joyce H. Lee, Eric P. Mosher, Young Sam Lee, Namandjé N. Bumpus, James M. Berger

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Topoisomerase II (topo II) is essential for disentangling newly replicated chromosomes. DNA unlinking involves the physical passage of one duplex through another and depends on the transient formation of double-stranded DNA breaks, a step exploited by frontline chemotherapeutics to kill cancer cells. Although anti-topo II drugs are efficacious, they also elicit cytotoxic side effects in normal cells; insights into how topo II is regulated in different cellular contexts is essential to improve their targeted use. Using chemical fractionation and mass spectrometry, we have discovered that topo II is subject to metabolic control through the TCA cycle. We show that TCA metabolites stimulate topo II activity in vitro and that levels of TCA flux modulate cellular sensitivity to anti-topo II drugs in vivo. Our work reveals an unanticipated connection between the control of DNA topology and cellular metabolism, a finding with ramifications for the clinical use of anti-topo II therapies.

Original languageEnglish
Pages (from-to)476-489.e6
JournalCell Chemical Biology
Volume29
Issue number3
DOIs
StatePublished - Mar 17 2022

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

  • DNA topology
  • ICRF-187
  • TCA cycle
  • cancer
  • chemotherapy
  • dexrazoxane
  • etoposide
  • metabolism
  • topoisomerase

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmacology
  • Drug Discovery
  • Clinical Biochemistry

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