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Strategies for co-targeting the PI3K/AKT/mTOR pathway in NSCLC
Susan Heavey1, Kenneth J O'Byrne1, Kathy Gately1
1Thoracic Oncology Research, Institute of Molecular Medicine, Trinity Centre for Health Sciences, St. James's Hospital, Dublin 8, Ireland.
Abstract:
The PI3K/AKT/mTOR pathway regulates cell growth and proliferation and is often dysregulated in cancer due to mutation, amplification, deletion, methylation and post-translational modifications. We and others have shown that activation of this pathway in non-small cell lung cancer (NSCLC) leads to a more aggressive disease which correlates to poor prognosis for patients. A multitude of selective inhibitors are in development which target key regulators in this pathway, however the success of PI3K targeted inhibition has been hampered by a high rate of innate and acquired resistance. Response to PI3K inhibition may be improved by co-targeting potential mediators of resistance, such as related cell surface receptors or other intracellular signaling pathways which cross-talk with the PI3K pathway. Inhibition of the PI3K pathway may also overcome radioresistance, chemoresistance and immune evasion in NSCLC. The identification of appropriate patient cohorts who will benefit from PI3K co-targeted inhibition strategies will be key to the success of these inhibitors.
Insights
Targeting the PI3K/AKT/mTOR pathway in non-small cell lung cancer (NSCLC) shows promise but faces resistance. Co-targeting resistance mechanisms may improve treatment outcomes for NSCLC patients.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Signaling Pathways
Background:
- The PI3K/AKT/mTOR pathway is crucial for cell growth and proliferation.
- Dysregulation of this pathway is common in cancer, particularly non-small cell lung cancer (NSCLC).
- Activated PI3K/AKT/mTOR signaling in NSCLC is linked to aggressive disease and poor patient prognosis.
Purpose of the Study:
- To explore strategies for overcoming resistance to PI3K/AKT/mTOR pathway inhibitors in NSCLC.
- To investigate the potential of co-targeting resistance mediators alongside PI3K pathway inhibition.
- To assess the role of PI3K pathway inhibition in overcoming radioresistance, chemoresistance, and immune evasion in NSCLC.
Main Methods:
- Review of existing research on PI3K/AKT/mTOR pathway dysregulation in NSCLC.
- Analysis of mechanisms contributing to innate and acquired resistance to PI3K inhibitors.
- Exploration of potential co-targeting strategies involving cell surface receptors and intracellular signaling pathways.
- Evaluation of PI3K pathway's role in radioresistance, chemoresistance, and immune evasion.
Main Results:
- Activation of the PI3K/AKT/mTOR pathway in NSCLC promotes aggressive disease and poor prognosis.
- Significant challenges exist due to innate and acquired resistance to PI3K inhibitors.
- Co-targeting resistance mechanisms, such as related receptors or cross-talking pathways, may enhance treatment efficacy.
- PI3K pathway inhibition holds potential to overcome radioresistance, chemoresistance, and immune evasion in NSCLC.
Conclusions:
- Targeted inhibition of the PI3K/AKT/mTOR pathway is a key area of investigation for NSCLC treatment.
- Overcoming resistance is critical for the success of PI3K inhibitors in NSCLC.
- Co-targeting strategies and identifying suitable patient cohorts are essential for advancing PI3K-targeted therapies in NSCLC.
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