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Targeting AKT/PKB to improve treatment outcomes for solid tumors
M Iida1, P M Harari1, D L Wheeler1
1Department of Human Oncology, University of Wisconsin in Madison, Madison, WI, USA.
The serine/threonine kinase AKT (also known as protein kinase B or PKB) is crucial in cancer. Hyperactivated AKT promotes resistance to radiotherapy, chemotherapy, and targeted therapies, suggesting its potential as a predictive marker.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- The phosphoinositide 3-kinase (PI3K)/AKT pathway is vital for cellular functions, including proliferation and survival.
- Hyperactivation of the PI3K/AKT pathway, often due to genetic mutations or overexpression, is common in human cancers.
- Activated AKT plays a role in DNA repair and attenuates apoptosis, contributing to treatment resistance.
Purpose of the Study:
- To review how activated AKT mediates resistance to various cancer treatment modalities.
- To discuss the impact of AKT on tumor cell response to receptor tyrosine kinase (RTK) targeted therapies.
- To summarize clinical trials investigating AKT inhibitors in combination therapies.
Main Methods:
- Literature review of current understanding on AKT's role in cancer therapy resistance.
- Analysis of studies examining AKT's influence on response to RTK-targeted treatments.
- Compilation of data from clinical trials involving AKT inhibitors.
Main Results:
- Activated AKT confers resistance to radiotherapy, chemotherapy, and RTK-targeted therapies.
- AKT signaling influences the efficacy of RTK-targeted cancer treatments.
- Clinical trials are exploring the combination of AKT inhibitors with standard and targeted therapies.
Conclusions:
- AKT is a significant factor in cancer treatment resistance.
- Targeting AKT may enhance the effectiveness of conventional and molecular therapies.
- Further research and clinical trials are needed to fully elucidate AKT's role and optimize therapeutic strategies.
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