Afatinib in the treatment of breast cancer

Sara A Hurvitz1, Rebecca Shatsky, Nadia Harbeck

  • 1University of California, Division of Hematology-Oncology, Department of Medicine , 10945 Le Conte Avenue, PVUB Suite 3360, Los Angeles, CA 90095 , USA +1 310 829 5471 ; +1 310 829 6192 ; shurvitz@mednet.ucla.edu.

Abstract

Insights

Afatinib shows promise for HER2-positive breast cancer, but a Phase III trial was halted due to safety concerns. Managing afatinib

Area of Science:

  • Oncology
  • Pharmacology

Background:

  • Trastuzumab has improved outcomes for HER2-positive breast cancer.
  • Resistance to trastuzumab necessitates new HER2-targeted therapies.
  • Afatinib is an irreversible pan-HER inhibitor with FDA approval in NSCLC.

Purpose of the Study:

  • To review current therapies for HER2-positive metastatic breast cancer.
  • To summarize afatinib's data in breast cancer from preclinical to Phase III studies.

Main Methods:

  • Literature review of preclinical analyses, Phase I, II, and III trials.
  • Summary of afatinib's efficacy and safety in HER2-positive breast cancer.

Main Results:

  • Phase I and II studies indicated promising activity for afatinib.
  • A Phase III trial in trastuzumab-resistant metastatic breast cancer was terminated early.
  • The early termination was due to an unfavorable risk-benefit analysis.

Conclusions:

  • Afatinib demonstrated promising activity in early-phase HER2-positive breast cancer trials.
  • The Phase III trial's early halt highlights significant toxicity concerns.
  • Future development of afatinib in breast cancer hinges on effective toxicity management.

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