Threshold to N-methyl-D-aspartate-induced seizures in mice undergoing chronic nutritional magnesium deprivation is lowered in a way partly responsive to acute magnesium and antioxidant administrations

Magnesium deficiency may be induced by a diet impoverished in magnesium. This nutritional deficit promotes chronic inflammatory and oxidative stresses, hyperexcitability and, in mice, susceptibility to audiogenic seizures. Potentiation by low-magnesium concentrations of the opening of N-methyl-d-asp...

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Veröffentlicht in:British journal of nutrition 2009-02, Vol.101 (3), p.317-321
Hauptverfasser: Maurois, Pierre, Pages, Nicole, Bac, Pierre, German-Fattal, Michèle, Agnani, Geneviève, Delplanque, Bernadette, Durlach, Jean, Poupaert, Jacques, Vamecq, Joseph
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container_issue 3
container_start_page 317
container_title British journal of nutrition
container_volume 101
creator Maurois, Pierre
Pages, Nicole
Bac, Pierre
German-Fattal, Michèle
Agnani, Geneviève
Delplanque, Bernadette
Durlach, Jean
Poupaert, Jacques
Vamecq, Joseph
description Magnesium deficiency may be induced by a diet impoverished in magnesium. This nutritional deficit promotes chronic inflammatory and oxidative stresses, hyperexcitability and, in mice, susceptibility to audiogenic seizures. Potentiation by low-magnesium concentrations of the opening of N-methyl-d-aspartate (NMDA) receptor/calcium channel in in vitro and ex vivo studies, and responsiveness to magnesium of in vivo brain injury states are now well established. By contrast, little or no specific attention has been, however, paid to the in vivo NMDA receptor function/excitability in magnesium deficiency. The present work reports for the first time that, in mice undergoing chronic nutritional deprivation in magnesium (35 v. 930 parts per million for 27 d in OF1 mice), NMDA-induced seizure threshold is significantly decreased (38 % of normal values). The attenuation in the drop of NMDA seizure threshold (percentage of reversal) was 58 and 20 % upon acute intraperitoneal administrations of magnesium chloride hexahydrate (28 mg magnesium/kg) and the antioxidant ebselen (20 mg/kg), respectively. In nutritionally magnesium-deprived animals, audiogenic seizures are completely prevented by these compound doses. Taken as a whole, our data emphasise that chronic magnesium deprivation in mice is a nutritional in vivo model for a lowered NMDA receptor activation threshold. This nutritional model responds remarkably to acute magnesium supply and moderately to acute antioxidant administration.
doi_str_mv 10.1017/S0007114508006752
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This nutritional deficit promotes chronic inflammatory and oxidative stresses, hyperexcitability and, in mice, susceptibility to audiogenic seizures. Potentiation by low-magnesium concentrations of the opening of N-methyl-d-aspartate (NMDA) receptor/calcium channel in in vitro and ex vivo studies, and responsiveness to magnesium of in vivo brain injury states are now well established. By contrast, little or no specific attention has been, however, paid to the in vivo NMDA receptor function/excitability in magnesium deficiency. The present work reports for the first time that, in mice undergoing chronic nutritional deprivation in magnesium (35 v. 930 parts per million for 27 d in OF1 mice), NMDA-induced seizure threshold is significantly decreased (38 % of normal values). The attenuation in the drop of NMDA seizure threshold (percentage of reversal) was 58 and 20 % upon acute intraperitoneal administrations of magnesium chloride hexahydrate (28 mg magnesium/kg) and the antioxidant ebselen (20 mg/kg), respectively. In nutritionally magnesium-deprived animals, audiogenic seizures are completely prevented by these compound doses. Taken as a whole, our data emphasise that chronic magnesium deprivation in mice is a nutritional in vivo model for a lowered NMDA receptor activation threshold. 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This nutritional deficit promotes chronic inflammatory and oxidative stresses, hyperexcitability and, in mice, susceptibility to audiogenic seizures. Potentiation by low-magnesium concentrations of the opening of N-methyl-d-aspartate (NMDA) receptor/calcium channel in in vitro and ex vivo studies, and responsiveness to magnesium of in vivo brain injury states are now well established. By contrast, little or no specific attention has been, however, paid to the in vivo NMDA receptor function/excitability in magnesium deficiency. The present work reports for the first time that, in mice undergoing chronic nutritional deprivation in magnesium (35 v. 930 parts per million for 27 d in OF1 mice), NMDA-induced seizure threshold is significantly decreased (38 % of normal values). 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This nutritional model responds remarkably to acute magnesium supply and moderately to acute antioxidant administration.</description><subject>Acoustic Stimulation - adverse effects</subject><subject>acute magnesium chloride hexahydrate</subject><subject>animal models</subject><subject>Animals</subject><subject>Antioxidants</subject><subject>Antioxidants - administration &amp; dosage</subject><subject>Antioxidants - pharmacology</subject><subject>Audiogenic seizures</subject><subject>Azoles - administration &amp; dosage</subject><subject>Azoles - pharmacology</subject><subject>Biological and medical sciences</subject><subject>Calcium channels</subject><subject>chronic diseases</subject><subject>Convulsions &amp; seizures</subject><subject>Diet</subject><subject>dietary mineral supplements</subject><subject>dietary minerals</subject><subject>dietary supplements</subject><subject>Dose-Response Relationship, Drug</subject><subject>Ebselen</subject><subject>Feeding. 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Pages, Nicole ; Bac, Pierre ; German-Fattal, Michèle ; Agnani, Geneviève ; Delplanque, Bernadette ; Durlach, Jean ; Poupaert, Jacques ; Vamecq, Joseph</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c571t-14fc68411c68b788f7349f75bdbd99b502e750b9e3d210a6ccee0194c1dc82293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Acoustic Stimulation - adverse effects</topic><topic>acute magnesium chloride hexahydrate</topic><topic>animal models</topic><topic>Animals</topic><topic>Antioxidants</topic><topic>Antioxidants - administration &amp; dosage</topic><topic>Antioxidants - pharmacology</topic><topic>Audiogenic seizures</topic><topic>Azoles - administration &amp; dosage</topic><topic>Azoles - pharmacology</topic><topic>Biological and medical sciences</topic><topic>Calcium channels</topic><topic>chronic diseases</topic><topic>Convulsions &amp; seizures</topic><topic>Diet</topic><topic>dietary mineral supplements</topic><topic>dietary minerals</topic><topic>dietary supplements</topic><topic>Dose-Response Relationship, Drug</topic><topic>Ebselen</topic><topic>Feeding. 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source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Free Full-Text Journals in Chemistry; Cambridge University Press Journals Complete
subjects Acoustic Stimulation - adverse effects
acute magnesium chloride hexahydrate
animal models
Animals
Antioxidants
Antioxidants - administration & dosage
Antioxidants - pharmacology
Audiogenic seizures
Azoles - administration & dosage
Azoles - pharmacology
Biological and medical sciences
Calcium channels
chronic diseases
Convulsions & seizures
Diet
dietary mineral supplements
dietary minerals
dietary supplements
Dose-Response Relationship, Drug
Ebselen
Feeding. Feeding behavior
Food and Nutrition
Fundamental and applied biological sciences. Psychology
human diseases
human nutrition
Life Sciences
Magnesium
Magnesium - administration & dosage
Magnesium - pharmacology
magnesium chloride
Magnesium chloride hexahydrate
Magnesium Deficiency - complications
Magnesium Deficiency - drug therapy
Mice
N-methyl-D-aspartate receptor
N-methyl-D-aspartate-induced seizure
N-Methylaspartate - toxicity
nutrient deficiencies
Nutrition
Nutritional magnesium deprivation
Organoselenium Compounds - administration & dosage
Organoselenium Compounds - pharmacology
Oxidative stress
Rodents
Seizure threshold
seizures
Seizures - chemically induced
Seizures - etiology
Vertebrates: anatomy and physiology, studies on body, several organs or systems
title Threshold to N-methyl-D-aspartate-induced seizures in mice undergoing chronic nutritional magnesium deprivation is lowered in a way partly responsive to acute magnesium and antioxidant administrations
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