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Updated: May 26, 2026

Pre-clinical Evaluation of Tyrosine Kinase Inhibitors for Treatment of Acute Leukemia
Published on: September 18, 2013
TAM receptors in leukemia: expression, signaling, and therapeutic implications
Luis Brandão1, Justine Migdall-Wilson, Kristen Eisenman
1Department of Pediatrics, University of Colorado Denver School of Medicine, Aurora, Colorado 80045, USA.
Abstract:
In the past 30 years there has been remarkable progress in the treatment of leukemia and lymphoma. However, current treatments are largely ineffective against relapsed leukemia and, in the case of pediatric patients, are often associated with severe long-term toxicities. Thus, there continues to be a critical need for the development of effective biologically targeted therapies. The TAM family of receptor tyrosine kinases-Tyro3, Axl, and Mer-plays an important role in normal hematopoiesis, including natural killer cell maturation, macrophage function, and platelet activation and signaling. Furthermore, TAM receptor activation leads to upregulation of pro-survival and proliferation signaling pathways, and aberrant TAM receptor expression contributes to cancer development, including myeloid and lymphoid leukemia. This review summarizes the role of TAM receptors in leukemia. We outline TAM receptor expression patterns in different forms of leukemia, describe potential mechanisms leading to their overexpression, and delineate the signaling pathways downstream of receptor activation that have been implicated in leukemogenesis. Finally, we discuss the current research focused on inhibitors against these receptors in an effort to develop new therapeutic strategies for leukemia.
Insights
Targeting TAM receptors (Tyro3, Axl, Mer) offers a promising strategy for treating relapsed leukemia, addressing limitations of current therapies and reducing pediatric patient toxicities.
Area of Science:
- Hematology
- Oncology
- Molecular Biology
Background:
- Leukemia and lymphoma treatments have advanced, but relapsed cases and pediatric toxicities remain significant challenges.
- The TAM receptor tyrosine kinases (Tyro3, Axl, Mer) are crucial in normal hematopoiesis and implicated in cancer development.
- Aberrant TAM receptor expression is linked to myeloid and lymphoid leukemias, driving pro-survival and proliferation pathways.
Purpose of the Study:
- To review the role of TAM receptors in leukemia pathogenesis.
- To outline TAM receptor expression patterns and overexpression mechanisms in various leukemias.
- To discuss TAM receptor signaling pathways involved in leukemogenesis and therapeutic targeting.
Main Methods:
- Literature review of studies on TAM receptors in leukemia.
- Analysis of TAM receptor expression patterns across different leukemia subtypes.
- Examination of downstream signaling pathways activated by TAM receptors.
- Review of current therapeutic strategies targeting TAM receptors.
Main Results:
- TAM receptors are differentially expressed in various leukemia types.
- Overexpression of TAM receptors contributes to leukemogenesis through pro-survival signaling.
- Specific signaling pathways downstream of TAM receptors are implicated in leukemia development.
- Inhibitors targeting TAM receptors are under investigation as novel therapeutic agents.
Conclusions:
- TAM receptors represent a critical therapeutic target for leukemia.
- Targeting TAM receptors may overcome resistance to conventional therapies.
- Developing TAM receptor inhibitors could lead to more effective and less toxic leukemia treatments.
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