Distribution of TRPV1 and TRPV2 in the human stellate ganglion and spinal cord

Souichi Kokubun, Tadasu Sato, Chikara Ogawa, Kai Kudo, Koju Goto, Yuki Fujii, Yoshinaka Shimizu, Hiroyuki Ichikawa

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Immunohistochemistry for the transient receptor potential cation channel subfamily V member 1 (TRPV1) and 2 (TRPV2) was performed on the stellate ganglion and spinal cord in human cadavers. In the stellate ganglion, 25.3% and 16.2% of sympathetic neurons contained TRPV1- and TRPV2-immunoreactivity, respectively. The cell size analysis also demonstrated that proportion of TRPV1- or TRPV2-immunoreactive (-IR) neurons among large (>600μm2) sympathetic neurons (TRPV1, 30.7%; TRPV2, 27.0%) was higher than among small (<600μm2) sympathetic neurons (TRPV1, 22.0%; TRPV2, 13.6%). The present study also demonstrated that 10.0% of sympathetic neurons in the stellate ganglion had pericellular TRPV2-IR nerve fibers. Fourteen percent of large neurons and 7.8% of small neurons were surrounded by TRPV2-IR nerve fibers. TRPV2-immunoreactivity was also detected in about 40% of neuronal cell bodies with pericellular TRPV2-IR nerve fibers. In the lateral horn of the human thoracic spinal cord, TRPV2-immunoreactivity was expressed by some neurons and many varicose fibers surrounding TRPV2-immunonegative neurons. TRPV2-IR pericellular fibers in the stellate ganglion may originate from the lateral horn of the spinal cord. There appears to be TRPV1- or TRPV2-IR sympathetic pathway in the human stellate ganglion and spinal cord.

Original languageEnglish
Pages (from-to)6-11
Number of pages6
JournalNeuroscience Letters
Volume590
DOIs
Publication statusPublished - 2015 Mar 7

Keywords

  • Human
  • Immunohistochemistry
  • Spinal cord
  • Stellate ganglion
  • TRPV1
  • TRPV2

ASJC Scopus subject areas

  • Neuroscience(all)

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