Referenced in: none

Automatically associated channels: TRP , TRPA , TRPA1

Title: H2S and NO cooperatively regulate vascular tone by activating a neuroendocrine HNO-TRPA1-CGRP signalling pathway.

Authors: Mirjam Eberhardt, Mária Dux, Barbara Namer, Jan Miljkovic, Nada Cordasic, Christine Will, Tatjana I Kichko, Jeanne de la Roche, Michael Fischer, Sebastián A Suárez, Damian Bikiel, Karola Dorsch, Andreas Leffler, Alexandru Babes, Angelika Lampert, Jochen K Lennerz, Johannes Jacobi, Marcelo A Martí, Fabio Doctorovich, Edward D Högestätt, Peter M Zygmunt, Ivana Ivanovic-Burmazovic, Karl Messlinger, Peter Reeh, Miloš R Filipović

Journal, date & volume: Nat Commun, 2014 , 5, 4381

PubMed link: http://www.ncbi.nlm.nih.gov/pubmed/25023795

Abstract
Nitroxyl (HNO) is a redox sibling of nitric oxide (NO) that targets distinct signalling pathways with pharmacological endpoints of high significance in the treatment of heart failure. Beneficial HNO effects depend, in part, on its ability to release calcitonin gene-related peptide (CGRP) through an unidentified mechanism. Here we propose that HNO is generated as a result of the reaction of the two gasotransmitters NO and H2S. We show that H2S and NO production colocalizes with transient receptor potential channel A1 (TRPA1), and that HNO activates the sensory chemoreceptor channel TRPA1 via formation of amino-terminal disulphide bonds, which results in sustained calcium influx. As a consequence, CGRP is released, which induces local and systemic vasodilation. H2S-evoked vasodilatatory effects largely depend on NO production and activation of HNO-TRPA1-CGRP pathway. We propose that this neuroendocrine HNO-TRPA1-CGRP signalling pathway constitutes an essential element for the control of vascular tone throughout the cardiovascular system.