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Updated: Jun 6, 2026

Development and Maintenance of a Preclinical Patient Derived Tumor Xenograft Model for the Investigation of Novel Anti-Cancer Therapies
Published on: September 30, 2016
PI-3-Kinase inhibitors in colorectal cancer
1University of Texas, M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA.
Abstract:
Despite recent successes, metastatic colorectal cancer remains a difficult cancer to treat. Since the initial discovery that PI-3-Kinase/AKT signaling played an important part in the growth and survival of colorectal tumors, preclinical studies have suggested that inhibitors of this pathway may have a role to play as potential therapeutics. With the surge of inhibitors of PI-3-Kinase from both academia and pharmaceutical companies rapidly moving through early clinical trials, the question of whether these preclinical studies will translate to patients will soon be answered. However, the failure or success of these agents will depend on correctly identifying patients that may benefit, as has been seen with EGFR inhibitors recently approved for treating this disease. Determining the potential of PI-3-Kinase inhibitors in colorectal cancer will depend on factors such as correctly monitoring biomarkers and patient response, enriching clinical trials by proactively stratifying patients into populations based on markers shown to not only predict response to these inhibitors, but also markers which may predict for lack of response, and determining how to combine these inhibitors with both current cytotoxic therapies and approved and emerging targeted therapies with optimal benefit. How these goals may be achieved in the current oncology landscape is addressed in this review with an emphasis on how these agents fit the goal of achieving personalized medicine.
Insights
Targeting PI-3-Kinase/AKT signaling shows promise for metastatic colorectal cancer. Success depends on identifying responsive patients and optimizing treatment combinations for personalized medicine.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Metastatic colorectal cancer (mCRC) remains challenging to treat effectively.
- The PI-3-Kinase/AKT signaling pathway is crucial for colorectal tumor growth and survival.
- Preclinical data suggest PI-3-Kinase inhibitors are potential therapeutics for mCRC.
Purpose of the Study:
- To review the potential of PI-3-Kinase inhibitors in treating metastatic colorectal cancer.
- To discuss strategies for patient stratification and biomarker monitoring for PI-3-Kinase inhibitor therapy.
- To explore optimal combination strategies for PI-3-Kinase inhibitors with existing and emerging therapies.
Main Methods:
- Review of preclinical studies on PI-3-Kinase/AKT pathway inhibitors in colorectal cancer.
- Analysis of clinical trial progress for PI-3-Kinase inhibitors.
- Discussion of biomarker-driven patient selection and treatment personalization.
Main Results:
- Numerous PI-3-Kinase inhibitors are advancing through early clinical trials.
- Patient selection based on predictive biomarkers is critical for therapeutic success, mirroring EGFR inhibitor strategies.
- Effective monitoring of biomarkers and patient response is essential for evaluating PI-3-Kinase inhibitors.
Conclusions:
- The clinical success of PI-3-Kinase inhibitors in mCRC hinges on precise patient stratification.
- Combining PI-3-Kinase inhibitors with other therapies requires careful consideration of efficacy and toxicity.
- These agents represent a significant step towards achieving personalized medicine in colorectal cancer treatment.
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