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.

Cancer Medicine
|November 23, 2025
PubMed
Abstract

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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