期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 23, 页码 -出版社
MDPI
DOI: 10.3390/ijms232315366
关键词
NTRK1; NTRK2; NTRK3; Merkel cell carcinoma; EPR17341
资金
- Veneto Institute of Oncology IOV-IRCCS
Merkel cell carcinoma is a rare and aggressive cutaneous malignant tumor with neuroendocrine differentiation. Research found no NTRK fusions in tumors involving neurotrophin receptor tyrosine kinase genes.
Merkel cell carcinoma (MCC) is a rare and aggressive cutaneous malignant tumor with neuroendocrine differentiation, with a rapidly growing incidence rate, high risk of recurrence, and aggressive behavior. The available therapeutic options for advanced disease are limited and there is a pressing need for new treatments. Tumors harboring fusions involving one of the neurotrophin receptor tyrosine kinase (NTRK) genes are now actionable with targeted inhibitors. NTRK-fused genes have been identified in neuroendocrine tumors of other sites; thus, a series of 76 MCCs were firstly analyzed with pan-TRK immunohistochemistry and the positive ones with real-time RT-PCR, RNA-based NGS, and FISH to detect the eventual underlying gene fusion. Despite 34 MCCs showing pan-TRK expression, NTRK fusions were not found in any cases. As in other tumors with neural differentiation, TRK expression seems to be physiological and not caused by gene fusions.
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