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With Our Powers Combined: Exploring PARP Inhibitors and Immunotherapy

Lawrence Kasherman, Katherine Karakasis1, Amit M Oza2

  • 1University Health Network.

Cancer Journal (Sudbury, Mass.)
|December 14, 2021
PubMed

Insights

Poly(ADP-ribose) polymerase inhibitors combined with immune checkpoint inhibitors show promise for solid tumors. Further research is needed to overcome drug resistance and optimize combination therapies for better cancer treatment outcomes.

Area of Science:

  • Oncology
  • Cancer Therapeutics
  • Immunotherapy

Background:

  • Poly(ADP-ribose) polymerase inhibitors (PARPi) and immune checkpoint inhibitors (ICIs) have demonstrated clinical success in cancer treatment.
  • Despite approvals for various malignancies, drug resistance remains a significant challenge in oncology.
  • Preclinical data suggest synergistic potential for combining PARPi and ICI therapies.

Purpose of the Study:

  • To review the therapeutic potential of combining PARPi and ICI therapy in solid tumors.
  • To explore the scientific rationale and clinical evidence supporting this combination.
  • To discuss future directions for clinical trials and biomarker development.

Main Methods:

  • Review of preclinical evidence and ongoing clinical trials (early and late-phase).
  • Analysis of therapeutic rationale for combining PARPi and ICI.
  • Examination of clinical data across various solid tumor subtypes, focusing on ovarian cancer.

Main Results:

  • Combination therapy shows promise in preclinical models and early clinical studies.
  • Understanding resistance mechanisms is crucial for optimizing treatment efficacy.
  • Biomarker identification is essential for patient selection and treatment stratification.

Conclusions:

  • Combination of PARPi and ICI therapy represents a promising strategy for solid tumors.
  • Overcoming drug resistance and identifying predictive biomarkers are key future challenges.
  • Further clinical investigation is warranted to fully realize the potential of this therapeutic approach.

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