Activation of transient receptor potential ankyrin 1 by hydrogen peroxide.
Hydrogen peroxide (H(2)O(2)), which is contained in industrial products, is also generated within cells. H(2)O(2) causes pain but it has not been elucidated how it activates sensory neurons in the pain pathway. Here we show that transient receptor potential ankyrin 1 (TRPA1), expressed by sensory neurons in the pain pathway, is a receptor for H(2)O(2). H(2)O(2) activated mouse TRPA1 to induce Ca(2+) influx and elicit non-selective cation currents. These effects of H(2)O(2) were mimicked by both reactive oxygen species and reactive nitrogen species. Cysteine-reducing agents suppressed H(2)O(2)-induced TRPA1 activation, whereas cysteine-oxidizing agents activated TRPA1. H(2)O(2) caused Ca(2+) influx in a subset of dorsal root ganglia neurons, which responded to allyl isothiocyanate, a TRPA1 ligand. These results suggest that TRPA1 might be involved in the sensation of pain caused by H(2)O(2).
Sawada
Yosuke
Y
Division of Biological Information, Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Yoshidahonmachi, Kyoto 606-8501, Japan.
Hosokawa
Hiroshi
H
Matsumura
Kiyoshi
K
Kobayashi
Shigeo
S
D000818:Animals; D017089:Ankyrin Repeat / Q000187:drug effects / Q000502:physiology*; D002460:Cell Line; D002478:Cells, Cultured; D006801:Humans; D006861:Hydrogen Peroxide / Q000378:metabolism* / Q000494:pharmacology; D051379:Mice; D008810:Mice, Inbred C57BL; D009475:Neurons, Afferent / Q000187:drug effects / Q000378:metabolism / Q000502:physiology; D051381:Rats; D000074025:TRPA1 Cation Channel; D050051:Transient Receptor Potential Channels / Q000819:agonists / Q000378:metabolism*
D000074025:TRPA1 Cation Channel; D050051:Transient Receptor Potential Channels; C475685:Trpa1 protein, mouse; D006861:Hydrogen Peroxide