Involvement of TRPA1 in ET-1-induced pain-like behavior in mice

Neuroreport. 2010 Feb 17;21(3):201-5. doi: 10.1097/WNR.0b013e328335b3c5.

Abstract

Transient receptor potential ankyrin subfamily member 1 (TRPA1) is a nonselective cation channel known as a noxious cold-activated ion channel. Recent findings implicated its involvement in acute and chronic cold nociception processes. Here, we investigated whether TRPA1 is involved in endothelin-1 (ET-1)-induced spontaneous pain-like behavior in C57BL/6J mice. We found that TRPA1 antagonists, HC-030031 and AP18, significantly reduced the pain-like behavior caused by ET-1. AP18 also significantly reduced the pain caused by cinnamaldehyde, an agonist of TRPA-1. However, AP18 did not alleviate the pain caused by capsaicin. The pain-like behavior caused by ET-1 was inhibited by phospholipase C inhibitor, but not by protein kinase C inhibitor. Low dose of ET-1 could potentiate cinnamaldehyde-induced nociception. Our results suggested that TRPA1 is involved in ET-1-induced spontaneous pain-like behavior in mice.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrolein / analogs & derivatives
  • Acrolein / toxicity
  • Animals
  • Behavior, Animal
  • Endothelin-1 / metabolism
  • Endothelin-1 / toxicity*
  • Enzyme Inhibitors / pharmacology
  • Irritants / metabolism
  • Irritants / toxicity
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Pain / chemically induced
  • Pain / metabolism*
  • TRPA1 Cation Channel
  • Transient Receptor Potential Channels / metabolism*

Substances

  • Endothelin-1
  • Enzyme Inhibitors
  • Irritants
  • TRPA1 Cation Channel
  • Transient Receptor Potential Channels
  • Trpa1 protein, mouse
  • Acrolein
  • cinnamaldehyde