Entinostat for the treatment of breast cancer

Dario Trapani1, Angela Esposito1, Carmen Criscitiello1

  • 1a Division of Early Drug Development , European Institute of Oncology , Milan , Italy.

Abstract

Insights

Entinostat, a histone deacetylase inhibitor, shows promise in treating various breast cancer subtypes, including resistant forms. It may also enhance immunotherapy effectiveness by modulating the tumor immune microenvironment.

Area of Science:

  • Oncology
  • Epigenetics
  • Pharmacology

Background:

  • Breast cancer is a heterogeneous disease with diverse molecular subtypes.
  • Epigenetic alterations, including DNA and histone modifications, drive tumor progression and treatment resistance.
  • Histone deacetylases (HDACs) play a critical role in regulating gene expression and cellular processes in cancer.

Purpose of the Study:

  • To explore the therapeutic potential of entinostat in breast cancer treatment.
  • To review clinical trial data evaluating entinostat's efficacy across different breast cancer subtypes.
  • To assess entinostat's role in overcoming endocrine resistance and enhancing anti-tumor immunity.

Main Methods:

  • Review of preclinical data and early-phase clinical studies on entinostat.
  • Analysis of clinical trials investigating entinostat in endocrine-resistant, HER2-positive, and triple-negative breast cancer.
  • Evaluation of entinostat's impact on immune modulation and its combination potential with immunotherapy.

Main Results:

  • Entinostat, a class I HDAC inhibitor, demonstrates anti-proliferative and pro-apoptotic effects in breast cancer cells.
  • Clinical trials suggest entinostat combined with antiestrogen therapy can overcome resistance pathways, particularly in hormone-positive breast cancer.
  • Entinostat exhibits potential in modulating the immune system, offering a rationale for combination with immunotherapy.

Conclusions:

  • Epigenetic therapy with entinostat represents a promising strategy for managing breast cancer, especially in resistant cases.
  • Entinostat may enhance the efficacy of current therapies by targeting resistance mechanisms and boosting anti-tumor immunity.
  • Combining entinostat with immunotherapy, such as cancer vaccines, warrants further investigation for improved treatment outcomes.

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