Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric Arteries

The vegetal alkaloid toxin veratridine (VTD) is a selective voltage-gated Na<sup>+</sup> (Na<sub>V</sub>) channel activator, widely used as a pharmacological tool in vascular physiology. We have previously shown that Na<sub>V</sub> channels, expressed in arteries,...

Full description

Saved in:
Bibliographic Details
Main Authors: Joohee Park, Christina Sahyoun, Jacinthe Frangieh, Léa Réthoré, Coralyne Proux, Linda Grimaud, Emilie Vessières, Jennifer Bourreau, César Mattei, Daniel Henrion, Céline Marionneau, Ziad Fajloun, Claire Legendre, Christian Legros
Format: Article
Language:English
Published: MDPI AG 2024-12-01
Series:Toxins
Subjects:
Online Access:https://www.mdpi.com/2072-6651/16/12/533
Tags: Add Tag
No Tags, Be the first to tag this record!
_version_ 1850084954310967296
author Joohee Park
Christina Sahyoun
Jacinthe Frangieh
Léa Réthoré
Coralyne Proux
Linda Grimaud
Emilie Vessières
Jennifer Bourreau
César Mattei
Daniel Henrion
Céline Marionneau
Ziad Fajloun
Claire Legendre
Christian Legros
author_facet Joohee Park
Christina Sahyoun
Jacinthe Frangieh
Léa Réthoré
Coralyne Proux
Linda Grimaud
Emilie Vessières
Jennifer Bourreau
César Mattei
Daniel Henrion
Céline Marionneau
Ziad Fajloun
Claire Legendre
Christian Legros
author_sort Joohee Park
collection DOAJ
description The vegetal alkaloid toxin veratridine (VTD) is a selective voltage-gated Na<sup>+</sup> (Na<sub>V</sub>) channel activator, widely used as a pharmacological tool in vascular physiology. We have previously shown that Na<sub>V</sub> channels, expressed in arteries, contribute to vascular tone in mouse mesenteric arteries (MAs). Here, we aimed to better characterize the mechanisms of action of VTD using mouse cecocolic arteries (CAs), a model of resistance artery. Using wire myography, we found that VTD induced vasorelaxation in mouse CAs. This VTD-induced relaxation was insensitive to prazosin, an α1-adrenergic receptor antagonist, but abolished by atropine, a muscarinic receptor antagonist. Indeed, VTD–vasorelaxant effect was totally inhibited by the Na<sub>V</sub> channel blocker tetrodotoxin (0.3 µM), the NO synthase inhibitor L-NNA (20 µM), and low extracellular Na<sup>+</sup> concentration (14.9 mM) and was partially blocked by the NCX1 antagonist SEA0400 (45.4% at 1 µM). Thus, we assumed that the VTD-induced vasorelaxation in CAs was due to acetylcholine release by parasympathetic neurons, which induced NO synthase activation mediated by the NCX1-Ca<sup>2+</sup> entry mode in endothelial cells (ECs). We demonstrated NCX1 expression in ECs by RT-qPCR and immunohisto- and western immunolabelling. VTD did not induce an increase in intracellular Ca<sup>2+</sup> ([Ca<sup>2+</sup>]i), while SEA0400 partially blocked acetylcholine-triggered [Ca<sup>2+</sup>]i elevations in Mile Sven 1 ECs. Altogether, these results illustrate that VTD activates Na<sub>V</sub> channels in parasympathetic neurons and then vasorelaxation in resistance arteries, which could explain arterial hypotension after VTD intoxication.
format Article
id doaj-art-c5d1f236b67a4782b4798e924b7d5fb1
institution DOAJ
issn 2072-6651
language English
publishDate 2024-12-01
publisher MDPI AG
record_format Article
series Toxins
spelling doaj-art-c5d1f236b67a4782b4798e924b7d5fb12025-08-20T02:43:50ZengMDPI AGToxins2072-66512024-12-01161253310.3390/toxins16120533Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric ArteriesJoohee Park0Christina Sahyoun1Jacinthe Frangieh2Léa Réthoré3Coralyne Proux4Linda Grimaud5Emilie Vessières6Jennifer Bourreau7César Mattei8Daniel Henrion9Céline Marionneau10Ziad Fajloun11Claire Legendre12Christian Legros13Univ. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceNantes Université, CNRS, INSERM, l’Institut du thorax, 44000 Nantes, FranceLaboratory of Applied Biotechnology (LBA3B), Department of Cell Culture, Azm Center for Research in Biotechnology and Its Applications, EDST, Lebanese University, Tripoli 1300, LebanonUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceUniv. Angers, INSERM, CNRS, MITOVASC, Equipe CarME, SFR ICAT, 49000 Angers, FranceThe vegetal alkaloid toxin veratridine (VTD) is a selective voltage-gated Na<sup>+</sup> (Na<sub>V</sub>) channel activator, widely used as a pharmacological tool in vascular physiology. We have previously shown that Na<sub>V</sub> channels, expressed in arteries, contribute to vascular tone in mouse mesenteric arteries (MAs). Here, we aimed to better characterize the mechanisms of action of VTD using mouse cecocolic arteries (CAs), a model of resistance artery. Using wire myography, we found that VTD induced vasorelaxation in mouse CAs. This VTD-induced relaxation was insensitive to prazosin, an α1-adrenergic receptor antagonist, but abolished by atropine, a muscarinic receptor antagonist. Indeed, VTD–vasorelaxant effect was totally inhibited by the Na<sub>V</sub> channel blocker tetrodotoxin (0.3 µM), the NO synthase inhibitor L-NNA (20 µM), and low extracellular Na<sup>+</sup> concentration (14.9 mM) and was partially blocked by the NCX1 antagonist SEA0400 (45.4% at 1 µM). Thus, we assumed that the VTD-induced vasorelaxation in CAs was due to acetylcholine release by parasympathetic neurons, which induced NO synthase activation mediated by the NCX1-Ca<sup>2+</sup> entry mode in endothelial cells (ECs). We demonstrated NCX1 expression in ECs by RT-qPCR and immunohisto- and western immunolabelling. VTD did not induce an increase in intracellular Ca<sup>2+</sup> ([Ca<sup>2+</sup>]i), while SEA0400 partially blocked acetylcholine-triggered [Ca<sup>2+</sup>]i elevations in Mile Sven 1 ECs. Altogether, these results illustrate that VTD activates Na<sub>V</sub> channels in parasympathetic neurons and then vasorelaxation in resistance arteries, which could explain arterial hypotension after VTD intoxication.https://www.mdpi.com/2072-6651/16/12/533veratridinevoltage-gated Na<sup>+</sup> channelNa<sup>+</sup>/Ca<sup>2+</sup> exchanger (NCX)mouse mesenteric arteriesmyographymesenteric and endothelial cell lines
spellingShingle Joohee Park
Christina Sahyoun
Jacinthe Frangieh
Léa Réthoré
Coralyne Proux
Linda Grimaud
Emilie Vessières
Jennifer Bourreau
César Mattei
Daniel Henrion
Céline Marionneau
Ziad Fajloun
Claire Legendre
Christian Legros
Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric Arteries
Toxins
veratridine
voltage-gated Na<sup>+</sup> channel
Na<sup>+</sup>/Ca<sup>2+</sup> exchanger (NCX)
mouse mesenteric arteries
myography
mesenteric and endothelial cell lines
title Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric Arteries
title_full Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric Arteries
title_fullStr Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric Arteries
title_full_unstemmed Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric Arteries
title_short Veratridine Induces Vasorelaxation in Mouse Cecocolic Mesenteric Arteries
title_sort veratridine induces vasorelaxation in mouse cecocolic mesenteric arteries
topic veratridine
voltage-gated Na<sup>+</sup> channel
Na<sup>+</sup>/Ca<sup>2+</sup> exchanger (NCX)
mouse mesenteric arteries
myography
mesenteric and endothelial cell lines
url https://www.mdpi.com/2072-6651/16/12/533
work_keys_str_mv AT jooheepark veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT christinasahyoun veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT jacinthefrangieh veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT learethore veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT coralyneproux veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT lindagrimaud veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT emilievessieres veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT jenniferbourreau veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT cesarmattei veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT danielhenrion veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT celinemarionneau veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT ziadfajloun veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT clairelegendre veratridineinducesvasorelaxationinmousececocolicmesentericarteries
AT christianlegros veratridineinducesvasorelaxationinmousececocolicmesentericarteries