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Hydrogen sulfide activates TRPA1 and releases 5-HT from epithelioid cells of the chicken thoracic aorta

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Title: Hydrogen sulfide activates TRPA1 and releases 5-HT from epithelioid cells of the chicken thoracic aorta
Authors: Delgermurun, Dugar Browse this author
Yamaguchi, Soichiro Browse this author →KAKEN DB
Ichii, Osamu Browse this author →KAKEN DB
Kon, Yasuhiro Browse this author →KAKEN DB
Ito, Shigeo Browse this author →KAKEN DB
Otsuguro, Ken-ichi Browse this author →KAKEN DB
Keywords: Chicken aorta
5-HT outflow
Hydrogen sulfide
TRPA1 channel
Ca2+ channel
Issue Date: Sep-2016
Publisher: Elsevier
Journal Title: Comparative Biochemistry and Physiology Part C : Toxicology & Pharmacology
Volume: 187
Start Page: 43
End Page: 49
Publisher DOI: 10.1016/j.cbpc.2016.05.004
PMID: 27183534
Abstract: Epithelioid cells in the chicken thoracic aorta are chemoreceptor cells that release 5-HT in response to hypoxia. It is likely that these cells play a role in chemoreception similar to that of glomus cells in the carotid bodies of mammals. Recently, H2S was reported to be a key mediator of carotid glomus cell responses to hypoxia. The aim of the present study was to reveal the mechanism of action of H2S on 5-HT outflow from chemoreceptor cells in the chicken thoracic aorta. The 5-HT outflow induced by NaHS, an H2S donor, and Na2S3, a polysulfide, was measured by using a HPLC equipped with an electrochemical detector. NaHS (0.3-3 mM) caused a concentration-dependent increase in 5-HT outflow, which was significantly inhibited by the removal of extracellular Ca2+. outflow induced by NaHS (0.3 mM) was also significantly inhibited by voltage-dependent L- and N-type Ca2+ channel blockers and a selective TRPA1 channel blocker. Cinnamaldehyde, a TRPA1 agonist, mimicked the secretory response to H2S. 5-HT outflow induced by Na2S3 (10 M) was also inhibited by the TRPA1 channel blocker. Furthermore, the expression of TRPA1 was localized to 5-HT-containing chemoreceptor cells in the aortic wall. These findings suggest that the activation of TRPA1 and voltage-dependent Ca2+ channels is involved in H2S-evoked 5-HT release from chemoreceptor cells in the chicken aorta. (C) 2016 Elsevier Inc. All rights reserved.
Rights: ©2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 乙黒 兼一

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