Brain inflammation enhances 1-methyl-4-phenylpyridinium-evoked neurotoxicity in rats
Identifieur interne : 002D46 ( Main/Exploration ); précédent : 002D45; suivant : 002D47Brain inflammation enhances 1-methyl-4-phenylpyridinium-evoked neurotoxicity in rats
Auteurs : Kerry B. Goralski [Canada] ; Kenneth W. Renton [Canada]Source :
- Toxicology and applied pharmacology [ 0041-008X ] ; 2004.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Experimental Parkinson's disease and Parkinson's disease in humans include a CNS inflammatory component that may contribute to the pathogenesis of the disease. CNS inflammation produces a loss in cytochrome P450 metabolism and may impair the brain's protection against neurotoxins. We have examined if preexisting inflammation in the brain could increase the toxicity of the dopaminergic toxin 1-methyl-4-phenylpyridinium (MPP+). Lipopolysaccharide (LPS, 25 μg) or saline (control) was injected into the left lateral cerebral ventricle. A single injection of MPP+ into the median forebrain bundle followed 48 h later and produced a reduction in striatal dopamine content that was dose and time dependant. Two-days after 5 μg of MPP+ was administered, a 90% decrease in striatal dopamine content was observed in saline- and LPS-pretreated rats. However, 4 and 7 days after 5 μg MPP+ treatment, striatal dopamine recovered up to 70-80% of control values in saline-pretreated rats but remained depressed (80-90%) in rats treated with LPS. These results suggested that CNS inflammation might create an increased risk factor for drug-induced CNS toxicity or chemically mediated Parkinson's disease. The prolonged toxicity of MPP+ may be due to a decrease in brain cytochrome P450 metabolism that occurs during inflammation. As a second objective for the study, we examined if the CNS lesion produced by MPP+ altered cytochrome P450 metabolic activity in the liver, kidney, and lung. We have demonstrated a novel mechanism whereby the brain pathology produced by MPP+ treatment contributes to a reduction in cytochrome P450 metabolism in the kidney but not the liver or lung. Therefore, a chemically evoked CNS disorder with a chronic inflammatory component might have major effects on the renal metabolism of drugs or endogenous substrates.
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 000970
- to stream PascalFrancis, to step Curation: 000353
- to stream PascalFrancis, to step Checkpoint: 000895
- to stream Main, to step Merge: 003117
- to stream Main, to step Curation: 002D46
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Brain inflammation enhances 1-methyl-4-phenylpyridinium-evoked neurotoxicity in rats</title>
<author><name sortKey="Goralski, Kerry B" sort="Goralski, Kerry B" uniqKey="Goralski K" first="Kerry B." last="Goralski">Kerry B. Goralski</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Pharmacology, Dalhousie University</s1>
<s2>Halifax, Nova Scotia, B3H 1X5</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Halifax, Nova Scotia, B3H 1X5</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Renton, Kenneth W" sort="Renton, Kenneth W" uniqKey="Renton K" first="Kenneth W." last="Renton">Kenneth W. Renton</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Pharmacology, Dalhousie University</s1>
<s2>Halifax, Nova Scotia, B3H 1X5</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Halifax, Nova Scotia, B3H 1X5</wicri:noRegion>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">INIST</idno>
<idno type="inist">04-0457869</idno>
<date when="2004">2004</date>
<idno type="stanalyst">PASCAL 04-0457869 INIST</idno>
<idno type="RBID">Pascal:04-0457869</idno>
<idno type="wicri:Area/PascalFrancis/Corpus">000970</idno>
<idno type="wicri:Area/PascalFrancis/Curation">000353</idno>
<idno type="wicri:Area/PascalFrancis/Checkpoint">000895</idno>
<idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000895</idno>
<idno type="wicri:doubleKey">0041-008X:2004:Goralski K:brain:inflammation:enhances</idno>
<idno type="wicri:Area/Main/Merge">003117</idno>
<idno type="wicri:Area/Main/Curation">002D46</idno>
<idno type="wicri:Area/Main/Exploration">002D46</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Brain inflammation enhances 1-methyl-4-phenylpyridinium-evoked neurotoxicity in rats</title>
<author><name sortKey="Goralski, Kerry B" sort="Goralski, Kerry B" uniqKey="Goralski K" first="Kerry B." last="Goralski">Kerry B. Goralski</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Pharmacology, Dalhousie University</s1>
<s2>Halifax, Nova Scotia, B3H 1X5</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Halifax, Nova Scotia, B3H 1X5</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Renton, Kenneth W" sort="Renton, Kenneth W" uniqKey="Renton K" first="Kenneth W." last="Renton">Kenneth W. Renton</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Pharmacology, Dalhousie University</s1>
<s2>Halifax, Nova Scotia, B3H 1X5</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Halifax, Nova Scotia, B3H 1X5</wicri:noRegion>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Toxicology and applied pharmacology</title>
<title level="j" type="abbreviated">Toxicol. appl. pharmacol.</title>
<idno type="ISSN">0041-008X</idno>
<imprint><date when="2004">2004</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Toxicology and applied pharmacology</title>
<title level="j" type="abbreviated">Toxicol. appl. pharmacol.</title>
<idno type="ISSN">0041-008X</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animal</term>
<term>Basal ganglion</term>
<term>Cytochrome P450</term>
<term>Inflammation</term>
<term>Kidney</term>
<term>Lipopolysaccharide</term>
<term>Liver</term>
<term>Nervous system diseases</term>
<term>Parkinson disease</term>
<term>Rat</term>
<term>Toxicity</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Inflammation</term>
<term>Parkinson maladie</term>
<term>Toxicité</term>
<term>Système nerveux pathologie</term>
<term>Animal</term>
<term>Rat</term>
<term>Cytochrome P450</term>
<term>Lipopolyoside</term>
<term>Noyau gris central</term>
<term>Rein</term>
<term>Foie</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Experimental Parkinson's disease and Parkinson's disease in humans include a CNS inflammatory component that may contribute to the pathogenesis of the disease. CNS inflammation produces a loss in cytochrome P450 metabolism and may impair the brain's protection against neurotoxins. We have examined if preexisting inflammation in the brain could increase the toxicity of the dopaminergic toxin 1-methyl-4-phenylpyridinium (MPP<sup>+</sup>
). Lipopolysaccharide (LPS, 25 μg) or saline (control) was injected into the left lateral cerebral ventricle. A single injection of MPP<sup>+</sup>
into the median forebrain bundle followed 48 h later and produced a reduction in striatal dopamine content that was dose and time dependant. Two-days after 5 μg of MPP<sup>+</sup>
was administered, a 90% decrease in striatal dopamine content was observed in saline- and LPS-pretreated rats. However, 4 and 7 days after 5 μg MPP<sup>+</sup>
treatment, striatal dopamine recovered up to 70-80% of control values in saline-pretreated rats but remained depressed (80-90%) in rats treated with LPS. These results suggested that CNS inflammation might create an increased risk factor for drug-induced CNS toxicity or chemically mediated Parkinson's disease. The prolonged toxicity of MPP<sup>+</sup>
may be due to a decrease in brain cytochrome P450 metabolism that occurs during inflammation. As a second objective for the study, we examined if the CNS lesion produced by MPP<sup>+</sup>
altered cytochrome P450 metabolic activity in the liver, kidney, and lung. We have demonstrated a novel mechanism whereby the brain pathology produced by MPP<sup>+</sup>
treatment contributes to a reduction in cytochrome P450 metabolism in the kidney but not the liver or lung. Therefore, a chemically evoked CNS disorder with a chronic inflammatory component might have major effects on the renal metabolism of drugs or endogenous substrates.</div>
</front>
</TEI>
<affiliations><list><country><li>Canada</li>
</country>
</list>
<tree><country name="Canada"><noRegion><name sortKey="Goralski, Kerry B" sort="Goralski, Kerry B" uniqKey="Goralski K" first="Kerry B." last="Goralski">Kerry B. Goralski</name>
</noRegion>
<name sortKey="Renton, Kenneth W" sort="Renton, Kenneth W" uniqKey="Renton K" first="Kenneth W." last="Renton">Kenneth W. Renton</name>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Canada/explor/ParkinsonCanadaV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002D46 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002D46 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Canada |area= ParkinsonCanadaV1 |flux= Main |étape= Exploration |type= RBID |clé= Pascal:04-0457869 |texte= Brain inflammation enhances 1-methyl-4-phenylpyridinium-evoked neurotoxicity in rats }}
This area was generated with Dilib version V0.6.29. |