Tonic Inhibition of Allergic Itch Signaling by the Descending Noradrenergic System in Mice

We investigated whether the descending noradrenergic system regulates allergic itch. Mosquito allergy of the hind paw elicited biting, an itch-related response, in sensitized mice. The biting was inhibited by intrathecal clonidine and reversed by yohimbine, an α2-adrenoceptor antagonist. The biting...

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Main Authors: Yoshikazu Gotoh (Author), Yu Omori (Author), Tsugunobu Andoh (Author), Yasushi Kuraishi (Author)
Format: Book
Published: Elsevier, 2011-01-01T00:00:00Z.
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042 |a dc 
100 1 0 |a Yoshikazu Gotoh  |e author 
700 1 0 |a Yu Omori  |e author 
700 1 0 |a Tsugunobu Andoh  |e author 
700 1 0 |a Yasushi Kuraishi  |e author 
245 0 0 |a Tonic Inhibition of Allergic Itch Signaling by the Descending Noradrenergic System in Mice 
260 |b Elsevier,   |c 2011-01-01T00:00:00Z. 
500 |a 1347-8613 
500 |a 10.1254/jphs.10305SC 
520 |a We investigated whether the descending noradrenergic system regulates allergic itch. Mosquito allergy of the hind paw elicited biting, an itch-related response, in sensitized mice. The biting was inhibited by intrathecal clonidine and reversed by yohimbine, an α2-adrenoceptor antagonist. The biting was increased by intrathecal pretreatment with the catecholaminergic neurotoxin 6-hydroxydopamine and the α-adrenoceptor antagonist phentolamine but not the serotonergic neurotoxin 5,7-dihydroxytryptamine. We propose that α2-adrenoceptors are involved in the inhibition of allergic itch in the spinal cord and that the descending noradrenergic system exerts a tonic inhibition on the itch signaling. The serotonergic system may not be involved. Keywords:: allergic itch, clonidine, descending noradrenergic system 
546 |a EN 
690 |a Therapeutics. Pharmacology 
690 |a RM1-950 
655 7 |a article  |2 local 
786 0 |n Journal of Pharmacological Sciences, Vol 115, Iss 3, Pp 417-420 (2011) 
787 0 |n http://www.sciencedirect.com/science/article/pii/S1347861319307716 
787 0 |n https://doaj.org/toc/1347-8613 
856 4 1 |u https://doaj.org/article/37d653552b3f4f29adf84b2e13f3d5a8  |z Connect to this object online.