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Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays
Published on: September 19, 2018
TAM Receptor Tyrosine Kinases in Cancer Drug Resistance
Mikaella Vouri1, Sassan Hafizi2
1Institute of Biomedical and Biomolecular Science, School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, United Kingdom.
Abstract:
Receptor tyrosine kinases (RTK) are major regulators of key biological processes, including cell growth, survival, and differentiation, and were established early on as proto-oncogenes, with aberrant expression linked to tumor progression in many cancers. Therefore, RTKs have emerged as major targets for selective therapy with small-molecule inhibitors. However, despite improvements in survival rates, it is now apparent that the targeting of RTKs with selective inhibitors is only transiently effective, as the majority of patients eventually become resistant to therapy. As chemoresistance is the leading cause of cancer spread, progression, and mortality, there is an increasing need for understanding the mechanisms by which cancer cells can evade therapy-induced cell death. The TAM (Tyro3, Axl, Mer) subfamily of RTKs in particular feature in a variety of cancer types that have developed resistance to a broad range of therapeutic agents, including both targeted as well as conventional chemotherapeutics. This article reviews the roles of TAMs as tumor drivers and as mediators of chemoresistance, and the potential effectiveness of targeting them as part of therapeutic strategies to delay or combat resistance. Cancer Res; 77(11); 2775-8. ©2017 AACR.
Insights
Receptor tyrosine kinases (RTKs) drive cancer growth but drug resistance develops. The TAM subfamily of RTKs promotes chemoresistance, suggesting they are key targets for overcoming treatment failure in cancer therapy.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Receptor tyrosine kinases (RTKs) are crucial for cell functions and implicated as proto-oncogenes in cancer.
- Targeting RTKs with small-molecule inhibitors has improved cancer survival but is often transient due to resistance.
- Chemoresistance is a major cause of cancer mortality, necessitating research into resistance mechanisms.
Purpose of the Study:
- To review the role of TAM (Tyro3, Axl, Mer) receptor tyrosine kinases in cancer progression.
- To explore how TAMs mediate chemoresistance to various cancer therapies.
- To discuss the potential of targeting TAMs to overcome or delay therapeutic resistance.
Main Methods:
- Literature review of studies on TAM receptor tyrosine kinases.
- Analysis of TAM subfamily roles in different cancer types.
- Evaluation of therapeutic strategies targeting TAMs.
Main Results:
- TAM RTKs are implicated as tumor drivers in various cancers.
- TAMs play a significant role in mediating resistance to targeted and conventional chemotherapeutics.
- Evidence suggests TAMs contribute to cancer cell evasion of therapy-induced cell death.
Conclusions:
- TAM RTKs are critical mediators of chemoresistance in diverse cancers.
- Targeting TAMs presents a promising strategy to combat or delay cancer drug resistance.
- Further investigation into TAM-targeted therapies is warranted to improve patient outcomes.
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