Abstract:
:Two tachykinin peptides, substance P (SP) and hemokinin-1 (HK-1), and three transient receptor potential (TRP) channels, TRPV1, TRPA1 and TRPM8, are similarly localized in the spinal dorsal horn and dorsal root ganglion, suggesting that TRP channels may be related or modulated by these tachykinin peptides. Thus, to clarify whether the responses of TRP channels are modulated by SP or HK-1, the effects of pretreatment with SP or HK-1 on the induction of scratching behavior by TRP channel agonists were examined. Pretreatment with SP or HK-1 enhanced the induction of scratching behavior by resiniferatoxin, a TRPV1 agonist, whereas scratching behavior induced by menthol, a TRPM8 agonist, was suppressed by pretreatment with these peptides. On the other hand, pretreatment with SP, but not HK-1, suppressed the induction of scratching behavior by cinnamaldehyde, a TRPA1 agonist. Taken together, the present results indicate that SP or HK-1 differentially modulated the response of TRPV1, TRPA1 or TRPM8 channel.
journal_name
Neuropeptidesjournal_title
Neuropeptidesauthors
Naono-Nakayama R,Sunakawa N,Ikeda T,Nishimori Tdoi
10.1016/j.npep.2009.10.002subject
Has Abstractpub_date
2010-02-01 00:00:00pages
57-61issue
1eissn
0143-4179issn
1532-2785pii
S0143-4179(09)00111-5journal_volume
44pub_type
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