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Genomic Determinants of PI3K Pathway Inhibitor Response in Cancer

Britta Weigelt1, Julian Downward

  • 1Signal Transduction Laboratory, Cancer Research UK London Research Institute London, UK.

Frontiers in Oncology
|September 13, 2012
PubMed

Insights

The phosphoinositide 3-kinase (PI3K) pathway is often dysregulated in cancer. Genomic features predict patient response to PI3K, mTOR, and AKT inhibitors, aiding personalized cancer therapy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The phosphoinositide 3-kinase (PI3K) pathway is frequently activated in various cancers due to genetic and epigenetic alterations.
  • Tumor dependence on PI3K pathway activation for malignant phenotype maintenance is well-established.
  • Targeting the PI3K pathway presents a promising therapeutic strategy, with multiple inhibitors in clinical development.

Purpose of the Study:

  • To review genomic determinants of response to PI3K, PI3K/mTOR, mTOR, and AKT inhibitors in cancer.
  • To highlight the role of tumor genomic features in predicting therapeutic response.
  • To discuss the development of molecular tools for patient stratification.

Main Methods:

  • Review of preclinical models and clinical trial data.
  • Analysis of genomic aberrations affecting PI3K pathway components.
  • Evaluation of molecular tools for patient stratification.

Main Results:

  • Genomic features of tumors significantly influence response to targeted small molecule inhibitors.
  • Alterations in different PI3K pathway components lead to distinct dependencies and varied responses to therapy.
  • Preclinical and clinical data identify specific genomic determinants for inhibitor response.

Conclusions:

  • Understanding the genomic landscape of PI3K pathway alterations is crucial for effective cancer therapy.
  • Genomic profiling enables patient stratification for targeted PI3K, mTOR, and AKT inhibitor treatments.
  • Development of molecular tools is essential for precision medicine approaches in oncology.
Keywords:
PI3K pathway inhibitorscancerdrug responsegenetic determinant

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