LotaV3, Main, Exploration, bibRecord, 000B13

Plasticity of excitation-contraction coupling in fish cardiac myocytes.

Identifieur interne : 000B13 ( Main/Exploration ); précédent : 000B12; suivant : 000B14

Plasticity of excitation-contraction coupling in fish cardiac myocytes.

Auteurs : Matti Vornanen [Finlande] ; Holly A. Shiels ; Anthony P. Farrell

Source :

Comparative biochemistry and physiology. Part A, Molecular & integrative physiology [ 1095-6433 ] ; 2002.

RBID : pubmed:12095866

Descripteurs français

KwdFr :
- Acclimatation (physiologie), Animaux (MeSH), Canaux calciques de type L (métabolisme), Contraction myocardique (physiologie), Modèles cardiovasculaires (MeSH), Poissons (physiologie), Potassium (métabolisme), Potentiels d'action (MeSH), Réticulum sarcoplasmique (métabolisme), Signalisation calcique (MeSH), Système de conduction du coeur (physiologie).
MESH :
- métabolisme : Canaux calciques de type L, Potassium, Réticulum sarcoplasmique.
- physiologie : Acclimatation, Contraction myocardique, Poissons, Système de conduction du coeur.
- Animaux, Modèles cardiovasculaires, Potentiels d'action, Signalisation calcique.

English descriptors

KwdEn :
- Acclimatization (physiology), Action Potentials (MeSH), Animals (MeSH), Calcium Channels, L-Type (metabolism), Calcium Signaling (MeSH), Fishes (physiology), Heart Conduction System (physiology), Models, Cardiovascular (MeSH), Myocardial Contraction (physiology), Potassium (metabolism), Sarcoplasmic Reticulum (metabolism).
MESH :
- chemical , metabolism : Calcium Channels, L-Type, Potassium.
- metabolism : Sarcoplasmic Reticulum.
- physiology : Acclimatization, Fishes, Heart Conduction System, Myocardial Contraction.
- Action Potentials, Animals, Calcium Signaling, Models, Cardiovascular.

Abstract

Ultrastructure, molecular composition and electrophysiological properties of cardiac myocytes and functional characteristics of the fish heart suggest that cycling of extracellular Ca(2+) is generally more important than intracellular cycling of Ca(2+) stores of the sarcoplasmic reticulum (SR) in activating contraction of fish cardiac myocytes. This is especially true for the ventricle. However, prominent species-specific differences exist in cardiac excitation-contraction coupling and in the relative roles of extracellular and intracellular Ca(2+) sources among the teleostean fish. In fact, in some fish species (tunas, burbot) the SR of atrial myocytes, under certain circumstances, may act as the major source of systolic Ca(2+). These interspecific differences are obviously an outcome of evolutionary adaptation to different habitats and modes of activity in these habitats. There is also substantial intraspecific variation in the SR Ca(2+)-release-to-SL-Ca(2+) influx ratio depending on acute and chronic temperature changes. Consequently excitation-contraction coupling of the fish cardiac myocytes is not a fixed entity, but rather a highly variable and malleable process that enables fish to have an appropriate cardiac scope to exploit a diverse range of environments.

PubMed: 12095866

Affiliations:

Finlande

Le document en format XML

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<author><name sortKey="Vornanen, Matti" sort="Vornanen, Matti" uniqKey="Vornanen M" first="Matti" last="Vornanen">Matti Vornanen</name>
<affiliation wicri:level="1"><nlm:affiliation>Department of Biology, University of Joensuu, P.O. Box 111, Finland. matti.vornanen@joensuu.fi</nlm:affiliation>
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<affiliation wicri:level="1"><nlm:affiliation>Department of Biology, University of Joensuu, P.O. Box 111, Finland. matti.vornanen@joensuu.fi</nlm:affiliation>
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<series><title level="j">Comparative biochemistry and physiology. Part A, Molecular & integrative physiology</title>
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<term>Action Potentials (MeSH)</term>
<term>Animals (MeSH)</term>
<term>Calcium Channels, L-Type (metabolism)</term>
<term>Calcium Signaling (MeSH)</term>
<term>Fishes (physiology)</term>
<term>Heart Conduction System (physiology)</term>
<term>Models, Cardiovascular (MeSH)</term>
<term>Myocardial Contraction (physiology)</term>
<term>Potassium (metabolism)</term>
<term>Sarcoplasmic Reticulum (metabolism)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Acclimatation (physiologie)</term>
<term>Animaux (MeSH)</term>
<term>Canaux calciques de type L (métabolisme)</term>
<term>Contraction myocardique (physiologie)</term>
<term>Modèles cardiovasculaires (MeSH)</term>
<term>Poissons (physiologie)</term>
<term>Potassium (métabolisme)</term>
<term>Potentiels d'action (MeSH)</term>
<term>Réticulum sarcoplasmique (métabolisme)</term>
<term>Signalisation calcique (MeSH)</term>
<term>Système de conduction du coeur (physiologie)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Calcium Channels, L-Type</term>
<term>Potassium</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Sarcoplasmic Reticulum</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Canaux calciques de type L</term>
<term>Potassium</term>
<term>Réticulum sarcoplasmique</term>
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<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Acclimatation</term>
<term>Contraction myocardique</term>
<term>Poissons</term>
<term>Système de conduction du coeur</term>
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<term>Fishes</term>
<term>Heart Conduction System</term>
<term>Myocardial Contraction</term>
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<keywords scheme="MESH" xml:lang="en"><term>Action Potentials</term>
<term>Animals</term>
<term>Calcium Signaling</term>
<term>Models, Cardiovascular</term>
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<keywords scheme="MESH" xml:lang="fr"><term>Animaux</term>
<term>Modèles cardiovasculaires</term>
<term>Potentiels d'action</term>
<term>Signalisation calcique</term>
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<front><div type="abstract" xml:lang="en">Ultrastructure, molecular composition and electrophysiological properties of cardiac myocytes and functional characteristics of the fish heart suggest that cycling of extracellular Ca(2+) is generally more important than intracellular cycling of Ca(2+) stores of the sarcoplasmic reticulum (SR) in activating contraction of fish cardiac myocytes. This is especially true for the ventricle. However, prominent species-specific differences exist in cardiac excitation-contraction coupling and in the relative roles of extracellular and intracellular Ca(2+) sources among the teleostean fish. In fact, in some fish species (tunas, burbot) the SR of atrial myocytes, under certain circumstances, may act as the major source of systolic Ca(2+). These interspecific differences are obviously an outcome of evolutionary adaptation to different habitats and modes of activity in these habitats. There is also substantial intraspecific variation in the SR Ca(2+)-release-to-SL-Ca(2+) influx ratio depending on acute and chronic temperature changes. Consequently excitation-contraction coupling of the fish cardiac myocytes is not a fixed entity, but rather a highly variable and malleable process that enables fish to have an appropriate cardiac scope to exploit a diverse range of environments.</div>
</front>
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<affiliations><list><country><li>Finlande</li>
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<tree><noCountry><name sortKey="Farrell, Anthony P" sort="Farrell, Anthony P" uniqKey="Farrell A" first="Anthony P" last="Farrell">Anthony P. Farrell</name>
<name sortKey="Shiels, Holly A" sort="Shiels, Holly A" uniqKey="Shiels H" first="Holly A" last="Shiels">Holly A. Shiels</name>
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<country name="Finlande"><noRegion><name sortKey="Vornanen, Matti" sort="Vornanen, Matti" uniqKey="Vornanen M" first="Matti" last="Vornanen">Matti Vornanen</name>
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Plasticity of excitation-contraction coupling in fish cardiac myocytes.

Plasticity of excitation-contraction coupling in fish cardiac myocytes.

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

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