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Tropomyosin 3 Gene Fusions in Cancers: From Mechanisms to Treatments-A Comprehensive Review
Anjie Chen1,2, Sixin Li1,2, Chen Guo1,2
1Department of Urology, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu Province, China.
Background:
Tropomyosin 3 (TPM3), one of the four tropomyosin genes, is predominantly expressed in eukaryotic cells. As a crucial regulatory protein, TPM3 associates with actin within thin myofilaments, thereby playing an essential role in the regulation of muscle contraction. Beyond its fundamental function in muscle physiology, TPM3 is implicated in oncogenesis.
Objective:
This review elucidates the molecular mechanisms underpinning TPM3 gene fusions, delineates the tumor types associated with these fusions, and examines their clinical implications.
Findings:
Gene fusions such as TPM3-NTRK1, TPM3-ALK, and TPM3-ROS1 have been identified as oncogenic drivers in various cancers. These fusions promote constitutive activation of tyrosine kinases, disrupt normal cellular signaling, and consequently accelerate tumorigenesis. Malignancies harboring TPM3 fusions encompass several tumor categories. With the advent of tyrosine kinase inhibitors (TKIs) targeting NTRK1, ALK, and ROS1 fusions, these rearrangements have gained significant therapeutic relevance. However, resistance mechanisms and tumor heterogeneity pose ongoing challenges to targeted therapy.
Conclusion:
By synthesizing current evidence, this review aims to provide insights into the diagnostic, prognostic, and therapeutic landscape of TPM3-related gene fusions, fostering advancements in precision oncology.
Insights
Tropomyosin 3 (TPM3) gene fusions drive cancer by activating tyrosine kinases. Targeted therapies show promise, but resistance and heterogeneity remain challenges in precision oncology.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Tropomyosin 3 (TPM3) is a key protein in muscle contraction.
- TPM3 also plays a role in cancer development (oncogenesis).
Purpose of the Study:
- Review the molecular mechanisms of TPM3 gene fusions.
- Identify associated tumor types and clinical implications.
Main Methods:
- Literature review of TPM3 gene fusions.
- Analysis of oncogenic drivers and targeted therapies.
Main Results:
- TPM3 fusions (e.g., TPM3-NTRK1, TPM3-ALK, TPM3-ROS1) act as oncogenic drivers.
- These fusions lead to constitutive tyrosine kinase activation and tumorigenesis.
- Tyrosine kinase inhibitors (TKIs) offer therapeutic relevance, but resistance and heterogeneity are challenges.
Conclusions:
- TPM3 fusions are significant in various cancers.
- Understanding these fusions aids diagnosis, prognosis, and targeted therapy.
- Advances in precision oncology are fostered by insights into TPM3-related gene fusions.
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