ROS/TRPA1/CGRP signaling mediates cortical spreading depression.

Jiang, Liwen, Ma, Dongqing, Grubb, Blair D and Wang, Minyan ORCID: 0000-0002-7955-1627 (2019) ROS/TRPA1/CGRP signaling mediates cortical spreading depression. The journal of headache and pain, 20 (1). 25-.

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Official URL: http://dx.doi.org/10.1186/s10194-019-0978-z

Abstract

<h4>Objectives</h4>The transient receptor potential ankyrin A 1 (TRPA1) channel and calcitonin gene-related peptide (CGRP) are targets for migraine prophylaxis. This study aimed to understand their mechanisms in migraine by investigating the role of TRPA1 in cortical spreading depression (CSD) in vivo and exploring how reactive oxygen species (ROS)/TRPA1/CGRP interplay in regulating cortical susceptibility to CSD.<h4>Methods</h4>Immunohistochemistry was used for detecting TRPA1 expression. CSD was induced by K<sup>+</sup> on the cerebral cortex, monitored using electrophysiology in rats, and intrinsic optical imaging in mouse brain slices, respectively. Drugs were perfused into contralateral ventricle of rats. Lipid peroxidation (malondialdehyde, MDA) analysis was used for indicating ROS level.<h4>Results</h4>TRPA1 was expressed in cortical neurons and astrocytes of rats and mice. TRPA1 deactivation by an anti-TRPA1 antibody reduced cortical susceptibility to CSD in rats and decreased ipsilateral MDA level induced by CSD. In mouse brain slices, H<sub>2</sub>O<sub>2</sub> facilitated submaximal CSD induction, which disappeared by the antioxidant, tempol and the TRPA1 antagonist, A-967079; Consistently, TRPA1 activation reversed prolonged CSD latency and reduced magnitude by the antioxidant. Further, blockade of CGRP prolonged CSD latency, which was reversed by H<sub>2</sub>O<sub>2</sub> and the TRPA1 agonist, allyl-isothiocyanate, respectively.<h4>Conclusions</h4>ROS/TRPA1/CGRP signaling plays a critical role in regulating cortical susceptibility to CSD. Inhibition ROS and deactivation of TRPA1 channels may have therapeutic benefits in preventing stress-triggered migraine via CGRP.

Item Type:	Article
Uncontrolled Keywords:	Cerebral Cortex, Animals, Mice, Inbred C57BL, Mice, Rats, Rats, Sprague-Dawley, Disease Models, Animal, Hydrogen Peroxide, Reactive Oxygen Species, Calcitonin Gene-Related Peptide, Immunohistochemistry, Signal Transduction, Male, Migraine Disorders, Cortical Spreading Depression, TRPA1 Cation Channel
Depositing User:	Symplectic Admin
Date Deposited:	04 Jun 2019 09:41
Last Modified:	19 Jan 2023 00:41
DOI:	10.1186/s10194-019-0978-z
Open Access URL:	https://doi.org/10.1186/s10194-019-0978-z
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3044369