La maladie de Parkinson au Canada (serveur d'exploration)

Attention, ce site est en cours de développement !
Attention, site généré par des moyens informatiques à partir de corpus bruts.
Les informations ne sont donc pas validées.

Mitochondrial iron sequestration in dopamine-challenged astroglia : Role of heme oxygenase-1 and the permeability transition pore

Identifieur interne : 003815 ( Main/Exploration ); précédent : 003814; suivant : 003816

Mitochondrial iron sequestration in dopamine-challenged astroglia : Role of heme oxygenase-1 and the permeability transition pore

Auteurs : H. M. Schipper [Canada] ; L. Bernier [Canada] ; K. Mehindate [Canada] ; D. Frankel [Canada]

Source :

RBID : Pascal:99-0315872

Descripteurs français

English descriptors

Abstract

Little is currently known concerning the mechanisms responsible for the excessive deposition of redox-active iron in the substantia nigra of subjects with Parkinson's disease (PD). In the present study, we demonstrate that dopamine promotes the selective sequestration of non-transferrin-derived iron by the mitochondrial compartment of cultured rat astroglia and that the mechanism underlying this novel dopamine effect is oxidative in nature. We also provide evidence that up-regulation of the stress protein heme oxygenase-1 (HO-1) is both necessary and sufficient for mitochondrial iron trapping in dopamine-challenged astroglia. Finally, we show that opening of the mitochondrial transition pore (MTP) mediates the influx of non-transferrin-derived iron into mitochondria of dopamine-stimulated and HO-1-transfected astroglia. Our findings provide an explanation for the pathological iron sequestration, mitochondrial insufficiency, and amplification of oxidative injury reported in the brains of PD subjects. Pharmacological blockade of transition metal trapping by "stressed" astroglial mitochondria (e.g., using HO-1 inhibitors or modulators of the MTP) may afford effective neuroprotection in patients with PD and other neurological afflictions.


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

<record>
<TEI>
<teiHeader>
<fileDesc>
<titleStmt>
<title xml:lang="en" level="a">Mitochondrial iron sequestration in dopamine-challenged astroglia : Role of heme oxygenase-1 and the permeability transition pore</title>
<author>
<name sortKey="Schipper, H M" sort="Schipper, H M" uniqKey="Schipper H" first="H. M." last="Schipper">H. M. Schipper</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
<affiliation wicri:level="4">
<inist:fA14 i1="02">
<s1>Departments of Neurology and Neurosurgery and Medicine (Geriatrics), McGill University</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<placeName>
<settlement type="city">Montréal</settlement>
<region type="state">Québec</region>
</placeName>
<orgName type="university">Université McGill</orgName>
</affiliation>
</author>
<author>
<name sortKey="Bernier, L" sort="Bernier, L" uniqKey="Bernier L" first="L." last="Bernier">L. Bernier</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Mehindate, K" sort="Mehindate, K" uniqKey="Mehindate K" first="K." last="Mehindate">K. Mehindate</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Frankel, D" sort="Frankel, D" uniqKey="Frankel D" first="D." last="Frankel">D. Frankel</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
<affiliation wicri:level="4">
<inist:fA14 i1="02">
<s1>Departments of Neurology and Neurosurgery and Medicine (Geriatrics), McGill University</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<placeName>
<settlement type="city">Montréal</settlement>
<region type="state">Québec</region>
</placeName>
<orgName type="university">Université McGill</orgName>
</affiliation>
</author>
</titleStmt>
<publicationStmt>
<idno type="wicri:source">INIST</idno>
<idno type="inist">99-0315872</idno>
<date when="1999">1999</date>
<idno type="stanalyst">PASCAL 99-0315872 INIST</idno>
<idno type="RBID">Pascal:99-0315872</idno>
<idno type="wicri:Area/PascalFrancis/Corpus">000D59</idno>
<idno type="wicri:Area/PascalFrancis/Curation">001164</idno>
<idno type="wicri:Area/PascalFrancis/Checkpoint">000C46</idno>
<idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000C46</idno>
<idno type="wicri:doubleKey">0022-3042:1999:Schipper H:mitochondrial:iron:sequestration</idno>
<idno type="wicri:Area/Main/Merge">003D99</idno>
<idno type="wicri:Area/Main/Curation">003815</idno>
<idno type="wicri:Area/Main/Exploration">003815</idno>
</publicationStmt>
<sourceDesc>
<biblStruct>
<analytic>
<title xml:lang="en" level="a">Mitochondrial iron sequestration in dopamine-challenged astroglia : Role of heme oxygenase-1 and the permeability transition pore</title>
<author>
<name sortKey="Schipper, H M" sort="Schipper, H M" uniqKey="Schipper H" first="H. M." last="Schipper">H. M. Schipper</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
<affiliation wicri:level="4">
<inist:fA14 i1="02">
<s1>Departments of Neurology and Neurosurgery and Medicine (Geriatrics), McGill University</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<placeName>
<settlement type="city">Montréal</settlement>
<region type="state">Québec</region>
</placeName>
<orgName type="university">Université McGill</orgName>
</affiliation>
</author>
<author>
<name sortKey="Bernier, L" sort="Bernier, L" uniqKey="Bernier L" first="L." last="Bernier">L. Bernier</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Mehindate, K" sort="Mehindate, K" uniqKey="Mehindate K" first="K." last="Mehindate">K. Mehindate</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
</author>
<author>
<name sortKey="Frankel, D" sort="Frankel, D" uniqKey="Frankel D" first="D." last="Frankel">D. Frankel</name>
<affiliation wicri:level="1">
<inist:fA14 i1="01">
<s1>Bloomfield Centre for Research in Aging, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<wicri:noRegion>Montreal, Quebec</wicri:noRegion>
</affiliation>
<affiliation wicri:level="4">
<inist:fA14 i1="02">
<s1>Departments of Neurology and Neurosurgery and Medicine (Geriatrics), McGill University</s1>
<s2>Montreal, Quebec</s2>
<s3>CAN</s3>
<sZ>1 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14>
<country>Canada</country>
<placeName>
<settlement type="city">Montréal</settlement>
<region type="state">Québec</region>
</placeName>
<orgName type="university">Université McGill</orgName>
</affiliation>
</author>
</analytic>
<series>
<title level="j" type="main">Journal of neurochemistry</title>
<title level="j" type="abbreviated">J. neurochem.</title>
<idno type="ISSN">0022-3042</idno>
<imprint>
<date when="1999">1999</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt>
<title level="j" type="main">Journal of neurochemistry</title>
<title level="j" type="abbreviated">J. neurochem.</title>
<idno type="ISSN">0022-3042</idno>
</seriesStmt>
</fileDesc>
<profileDesc>
<textClass>
<keywords scheme="KwdEn" xml:lang="en">
<term>Astrocyte</term>
<term>Dopamine</term>
<term>Heme oxygenase (decyclizing)</term>
<term>In vitro</term>
<term>Iron</term>
<term>Mitochondria</term>
<term>Oxidative stress</term>
<term>Parkinson disease</term>
<term>Permeability</term>
<term>Rat</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr">
<term>Fer</term>
<term>Dopamine</term>
<term>Heme oxygenase (decyclizing)</term>
<term>Astrocyte</term>
<term>Perméabilité</term>
<term>Mitochondrie</term>
<term>Parkinson maladie</term>
<term>Rat</term>
<term>Stress oxydatif</term>
<term>In vitro</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>Fer</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">Little is currently known concerning the mechanisms responsible for the excessive deposition of redox-active iron in the substantia nigra of subjects with Parkinson's disease (PD). In the present study, we demonstrate that dopamine promotes the selective sequestration of non-transferrin-derived iron by the mitochondrial compartment of cultured rat astroglia and that the mechanism underlying this novel dopamine effect is oxidative in nature. We also provide evidence that up-regulation of the stress protein heme oxygenase-1 (HO-1) is both necessary and sufficient for mitochondrial iron trapping in dopamine-challenged astroglia. Finally, we show that opening of the mitochondrial transition pore (MTP) mediates the influx of non-transferrin-derived iron into mitochondria of dopamine-stimulated and HO-1-transfected astroglia. Our findings provide an explanation for the pathological iron sequestration, mitochondrial insufficiency, and amplification of oxidative injury reported in the brains of PD subjects. Pharmacological blockade of transition metal trapping by "stressed" astroglial mitochondria (e.g., using HO-1 inhibitors or modulators of the MTP) may afford effective neuroprotection in patients with PD and other neurological afflictions.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Canada</li>
</country>
<region>
<li>Québec</li>
</region>
<settlement>
<li>Montréal</li>
</settlement>
<orgName>
<li>Université McGill</li>
</orgName>
</list>
<tree>
<country name="Canada">
<noRegion>
<name sortKey="Schipper, H M" sort="Schipper, H M" uniqKey="Schipper H" first="H. M." last="Schipper">H. M. Schipper</name>
</noRegion>
<name sortKey="Bernier, L" sort="Bernier, L" uniqKey="Bernier L" first="L." last="Bernier">L. Bernier</name>
<name sortKey="Frankel, D" sort="Frankel, D" uniqKey="Frankel D" first="D." last="Frankel">D. Frankel</name>
<name sortKey="Frankel, D" sort="Frankel, D" uniqKey="Frankel D" first="D." last="Frankel">D. Frankel</name>
<name sortKey="Mehindate, K" sort="Mehindate, K" uniqKey="Mehindate K" first="K." last="Mehindate">K. Mehindate</name>
<name sortKey="Schipper, H M" sort="Schipper, H M" uniqKey="Schipper H" first="H. M." last="Schipper">H. M. Schipper</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 003815 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 003815 | 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:99-0315872
   |texte=   Mitochondrial iron sequestration in dopamine-challenged astroglia : Role of heme oxygenase-1 and the permeability transition pore
}}

Wicri

This area was generated with Dilib version V0.6.29.
Data generation: Thu May 4 22:20:19 2017. Site generation: Fri Dec 23 23:17:26 2022