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Clinical Implications of Mutations in the PI3K Pathway in HER2+ Breast Cancer: Prognostic or Predictive?

Ingrid A Mayer1

  • 1Department of Medicine, Breast Cancer Program, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, USA; Division of Hematology/Oncology, Vanderbilt University Medical Center/Vanderbilt-Ingram Cancer Center, 2220 Pierce Avenue, 777 PRB, Nashville, TN 37232-6307, USA.

Current Breast Cancer Reports
|February 17, 2016
PubMed

Insights

Targeted cancer therapies are advancing, but resistance can occur. This review focuses on the phosphoinositide 3-kinase (PI3K)/AKT pathway

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Targeted anti-cancer therapies leverage tumor-specific genetic vulnerabilities.
  • The phosphoinositide 3-kinase (PI3K)/AKT pathway is frequently altered in cancers.
  • PI3K/AKT pathway activation can lead to resistance against HER2-targeted therapies.

Purpose of the Study:

  • To review the impact of phosphoinositide 3-kinase (PI3K)/AKT pathway mutations in HER2-amplified breast cancers.
  • To discuss the role of PI3K/AKT pathway alterations in therapeutic resistance.
  • To highlight the development of PI3K/AKT-targeted drugs.

Main Methods:

  • Literature review of recent advances in tumor genetics and drug development.
  • Analysis of studies investigating the PI3K/AKT pathway in cancer.
  • Examination of clinical trial data for PI3K/AKT inhibitors.

Main Results:

  • The PI3K/AKT pathway is a common target in cancer therapy development.
  • Mutations in the PI3K/AKT pathway are implicated in resistance to HER2-targeted treatments.
  • Numerous PI3K/AKT inhibitors are in various stages of clinical trials.

Conclusions:

  • Understanding PI3K/AKT pathway alterations is crucial for overcoming resistance to HER2-targeted therapies.
  • Targeting the PI3K/AKT pathway holds promise for improving outcomes in HER2-amplified breast cancer.
  • Further research and clinical trials are needed to optimize PI3K/AKT-targeted treatment strategies.
Keywords:
Breast cancerClinical trialsMammalian target of rapamycin (mTOR)MutationPathway inhibitorsPhosphoinositide 3-kinase (PI3K)/AKT

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