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Updated: Sep 20, 2025

Assessment of Global DNA Double-Strand End Resection using BrdU-DNA Labeling coupled with Cell Cycle Discrimination Imaging
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Poly (ADP-ribose) polymerase inhibitors (PARPi) for advanced malignancies with multiple DNA-repair genetic

Jian Hu1, Peihe Liang1, Dachun Jin2

  • 1Department of Urology, The Second Affiliated Hospital of Chongqing Medical University, Chong Qing, China.

Expert Review of Anticancer Therapy
|June 9, 2022
PubMed
Abstract

Insights

Poly (ADP-ribose) polymerase inhibitors (PARPi) offer synthetic lethality in advanced tumors with homologous recombination repair (HRR) gene defects. Patients with multiple HRR mutations may benefit more from PARPi, but further research is needed.

Area of Science:

  • Oncology
  • Genetics
  • Pharmacology

Background:

  • Poly (ADP-ribose) polymerase inhibitors (PARPi) are approved for advanced cancers with homologous recombination repair (HRR) gene defects.
  • PARPi induce synthetic lethality in cancer cells with HRR mutations, leading to apoptosis.
  • The synthetic lethality theory suggests a greater genetic alteration burden may correlate with better PARPi outcomes, but evidence is limited.

Purpose of the Study:

  • To summarize the therapeutic effects of PARPi in advanced tumors with multiple HRR genetic mutations.
  • To compare PARPi outcomes in cancers with multiple HRR mutations versus single mutations.

Main Methods:

  • Literature review and summarization of existing studies on PARPi efficacy.
  • Comparative analysis of treatment responses based on the number of HRR genetic mutations.

Main Results:

  • Limited evidence suggests a potentially encouraging response to PARPi in patients with multiple HRR genetic mutations compared to those with single mutations.
  • Some patients with multiple HRR mutations experienced negative treatment effects.

Conclusions:

  • Further research is required to elucidate the role of PARPi in tumor cells with multiple HRR genetic mutations.
  • Understanding the impact of genetic alteration burden on PARPi efficacy is crucial for optimizing cancer treatment.
Keywords:
DNA damage repairPARPicancer treatmentgenetic mutationhomologous recombination repair

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