Targeting the replication stress response through synthetic lethal strategies in cancer medicine

Natalie Y.L. Ngoi, Melissa M. Pham, David S.P. Tan, Timothy A. Yap

Research output: Contribution to journalReview articlepeer-review

42 Scopus citations

Abstract

The replication stress response (RSR) involves a downstream kinase cascade comprising ataxia telangiectasia-mutated (ATM), ATM and rad3-related (ATR), checkpoint kinases 1 and 2 (CHK1/2), and WEE1-like protein kinase (WEE1), which cooperate to arrest the cell cycle, protect stalled forks, and allow time for replication fork repair. In the presence of elevated replicative stress, cancers are increasingly dependent on RSR to maintain genomic integrity. An increasing number of drug candidates targeting key RSR nodes, as monotherapy through synthetic lethality, or through rational combinations with immune checkpoint inhibitors and targeted therapies, are demonstrating promising efficacy in early phase trials. RSR targeting is also showing potential in reversing PARP inhibitor resistance, an important area of unmet clinical need. In this review, we introduce the concept of targeting the RSR, detail the current landscape of monotherapy and combination strategies, and discuss emerging therapeutic approaches, such as targeting Polθ.

Original languageEnglish (US)
Pages (from-to)930-957
Number of pages28
JournalTrends in Cancer
Volume7
Issue number10
DOIs
StatePublished - Oct 2021

Keywords

  • PARP inhibition resistance
  • combination therapy
  • replicative stress response
  • synthetic lethality

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

MD Anderson CCSG core facilities

  • Clinical and Translational Research Center

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