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TRPA1 Expression in Synovial Sarcoma May Support Neural Origin.

Francesco De Logu1, Filippo Ugolini2, Chiara Caporalini3

  • 1Section of Clinical Pharmacology and Oncology, Department of Health Sciences, University of Florence, 50139 Florence, Italy.

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|October 20, 2020
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Summary

Synovial sarcoma (SS) shows high expression of the pain sensor TRPA1 (transient receptor potential ankyrin 1). This finding supports a neural origin for SS and may explain tumor-associated pain.

Keywords:
TRPA1neural stem cellssynovial sarcoma

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Area of Science:

  • Oncology
  • Neuroscience
  • Molecular Biology

Background:

  • Synovial sarcoma (SS) is a soft tissue neoplasm with unclear cell origins.
  • SS can present with long-term pain, but the underlying mechanisms are not fully understood.
  • Transient receptor potential ankyrin 1 (TRPA1) channels are key pain sensors in neurons and are also found in neural crest-derived cells.

Purpose of the Study:

  • To investigate TRPA1 expression in synovial sarcoma.
  • To explore the potential role of TRPA1 in the neural origin and pain associated with SS.

Main Methods:

  • Immunohistochemistry was used to analyze TRPA1 expression in a cohort of 41 SS samples.
  • Co-staining with neural markers (pS100, SOX10, SLUG, SNAIL) was performed.

Main Results:

  • TRPA1 was detected in 92.6% of the synovial sarcoma cases studied.
  • Triple staining supported a neural origin for SS, with TRPA1 present in most cases.
  • Some TRPA1-positive cases lacked other neural markers, suggesting tumor plasticity or dedifferentiation.

Conclusions:

  • TRPA1 is frequently expressed in synovial sarcoma, supporting a neural cell of origin.
  • TRPA1 expression may contribute to the characteristic pain symptoms and progression of SS.
  • Further research is needed to clarify TRPA1's specific role in SS neoplastic cells.