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Targeting Axl and Mer kinases in cancer
Anupam Verma1, Steven L Warner, Hariprasad Vankayalapati
1Pediatric Hematology/Oncology, Primary Children's Medical Center, Huntsman Cancer Institute, 2000 Circle of Hope, Salt Lake City, UT 84112, USA. anupam.verma@hsc.utah.edu
Abstract:
Receptor tyrosine kinases (RTK) are cell-surface transmembrane receptors that contain regulated kinase activity within their cytoplasmic domain and play an important role in signal transduction in both normal and malignant cells. The mammalian TAM RTK family includes 3 closely related members: Tyro-3, Axl, and Mer. Overexpression or ectopic expression of the TAM receptors has been detected in a wide array of human cancers. Growth arrest-specific gene 6 has been identified as the major ligand for these TAM RTKs, and its binding to the receptors has been shown to promote proliferation and survival of cancer cells in vitro. Abnormal expression and activation of Axl or Mer can provide a survival advantage for certain cancer cells. Inhibition of Axl and Mer may enhance the sensitivity of cancer cells to cytotoxic agents and would potentially be a therapeutic strategy to target cancer cells. This review elucidates the role of Axl and Mer in normal cellular function and their role in oncogenesis. In addition, we review the potential to inhibit these RTKs for the development of therapeutic targets in treatment of cancer.
Insights
Receptor tyrosine kinases (RTKs) like Axl and Mer are crucial in cancer cell survival. Inhibiting these kinases may offer a new therapeutic strategy to improve cancer treatment outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Cell Signaling
Background:
- Receptor tyrosine kinases (RTKs) regulate vital cellular processes.
- The TAM RTK family (Tyro-3, Axl, Mer) is implicated in human cancers.
- Growth arrest-specific gene 6 (Gas6) is a key ligand for TAM RTKs.
Purpose of the Study:
- To review the role of Axl and Mer in normal cellular function and oncogenesis.
- To explore the therapeutic potential of inhibiting Axl and Mer in cancer treatment.
Main Methods:
- Literature review of existing studies on Axl, Mer, and their ligand Gas6.
- Analysis of the role of TAM RTKs in cancer cell proliferation and survival.
- Evaluation of Axl and Mer as potential therapeutic targets.
Main Results:
- Overexpression of TAM receptors is observed in various human cancers.
- Gas6 binding to Axl and Mer promotes cancer cell proliferation and survival.
- Inhibition of Axl and Mer can sensitize cancer cells to cytotoxic agents.
Conclusions:
- Axl and Mer play significant roles in cancer development and progression.
- Targeting Axl and Mer presents a promising therapeutic strategy for cancer treatment.
- Further research into Axl and Mer inhibition could lead to novel cancer therapies.
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