Fasting limits the increase in intracellular calcium during ischemia in isolated rat hearts.
Identifieur interne : 000701 ( PubMed/Checkpoint ); précédent : 000700; suivant : 000702Fasting limits the increase in intracellular calcium during ischemia in isolated rat hearts.
Auteurs : R. Ramasamy [États-Unis] ; H. Liu ; G. Cherednichenko ; S. SchaeferSource :
- Basic research in cardiology [ 0300-8428 ] ; 2001.
Descripteurs français
- KwdFr :
- Acide egtazique (analogues et dérivés), Acide egtazique (pharmacologie), Animaux, Calcium (métabolisme), Calcium-Transporting ATPases (métabolisme), Chélateurs (pharmacologie), Ischémie myocardique (métabolisme), Jeûne (physiologie), Lésion de reperfusion myocardique (métabolisme), Myocarde (métabolisme), Pression sanguine, Rats, Réticulum sarcoplasmique (métabolisme), Sodium (métabolisme), Sodium-Potassium-Exchanging ATPase (métabolisme), Spectroscopie par résonance magnétique, Techniques in vitro, Échangeur sodium-calcium (métabolisme).
- MESH :
- analogues et dérivés : Acide egtazique.
- métabolisme : Calcium, Calcium-Transporting ATPases, Ischémie myocardique, Lésion de reperfusion myocardique, Myocarde, Réticulum sarcoplasmique, Sodium, Sodium-Potassium-Exchanging ATPase, Échangeur sodium-calcium.
- pharmacologie : Acide egtazique, Chélateurs.
- physiologie : Jeûne.
- Animaux, Pression sanguine, Rats, Spectroscopie par résonance magnétique, Techniques in vitro.
English descriptors
- KwdEn :
- Animals, Blood Pressure, Calcium (metabolism), Calcium-Transporting ATPases (metabolism), Chelating Agents (pharmacology), Egtazic Acid (analogs & derivatives), Egtazic Acid (pharmacology), Fasting (physiology), In Vitro Techniques, Magnetic Resonance Spectroscopy, Myocardial Ischemia (metabolism), Myocardial Reperfusion Injury (metabolism), Myocardium (metabolism), Rats, Sarcoplasmic Reticulum (metabolism), Sodium (metabolism), Sodium-Calcium Exchanger (metabolism), Sodium-Potassium-Exchanging ATPase (metabolism).
- MESH :
- chemical , analogs & derivatives : Egtazic Acid.
- chemical , metabolism : Calcium, Calcium-Transporting ATPases, Sodium, Sodium-Calcium Exchanger, Sodium-Potassium-Exchanging ATPase.
- chemical , pharmacology : Chelating Agents, Egtazic Acid.
- metabolism : Myocardial Ischemia, Myocardial Reperfusion Injury, Myocardium, Sarcoplasmic Reticulum.
- physiology : Fasting.
- Animals, Blood Pressure, In Vitro Techniques, Magnetic Resonance Spectroscopy, Rats.
Abstract
Fasting has been shown to limit ischemic injury and improve functional activity after global ischemia. Because calcium overload is considered a mechanism of ischemic injury, we hypothesized that fasting would limit the accumulation of intracellular calcium [Ca]i during ischemia, potentially due to reduced accumulation of intracellular sodium [Na]i.
PubMed: 11605993
Affiliations:
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pubmed:11605993Le document en format XML
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<affiliation wicri:level="4"><nlm:affiliation>Columbia University, Dept. of Cardiology, New York, NY 10032, USA.</nlm:affiliation>
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<wicri:regionArea>Columbia University, Dept. of Cardiology, New York, NY 10032</wicri:regionArea>
<placeName><region type="state">État de New York</region>
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<orgName type="university">Université Columbia</orgName>
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<author><name sortKey="Liu, H" sort="Liu, H" uniqKey="Liu H" first="H" last="Liu">H. Liu</name>
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<author><name sortKey="Cherednichenko, G" sort="Cherednichenko, G" uniqKey="Cherednichenko G" first="G" last="Cherednichenko">G. Cherednichenko</name>
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<author><name sortKey="Liu, H" sort="Liu, H" uniqKey="Liu H" first="H" last="Liu">H. Liu</name>
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<term>Blood Pressure</term>
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<term>Chelating Agents (pharmacology)</term>
<term>Egtazic Acid (analogs & derivatives)</term>
<term>Egtazic Acid (pharmacology)</term>
<term>Fasting (physiology)</term>
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<term>Magnetic Resonance Spectroscopy</term>
<term>Myocardial Ischemia (metabolism)</term>
<term>Myocardial Reperfusion Injury (metabolism)</term>
<term>Myocardium (metabolism)</term>
<term>Rats</term>
<term>Sarcoplasmic Reticulum (metabolism)</term>
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<term>Acide egtazique (pharmacologie)</term>
<term>Animaux</term>
<term>Calcium (métabolisme)</term>
<term>Calcium-Transporting ATPases (métabolisme)</term>
<term>Chélateurs (pharmacologie)</term>
<term>Ischémie myocardique (métabolisme)</term>
<term>Jeûne (physiologie)</term>
<term>Lésion de reperfusion myocardique (métabolisme)</term>
<term>Myocarde (métabolisme)</term>
<term>Pression sanguine</term>
<term>Rats</term>
<term>Réticulum sarcoplasmique (métabolisme)</term>
<term>Sodium (métabolisme)</term>
<term>Sodium-Potassium-Exchanging ATPase (métabolisme)</term>
<term>Spectroscopie par résonance magnétique</term>
<term>Techniques in vitro</term>
<term>Échangeur sodium-calcium (métabolisme)</term>
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<term>Sodium-Calcium Exchanger</term>
<term>Sodium-Potassium-Exchanging ATPase</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Myocardial Ischemia</term>
<term>Myocardial Reperfusion Injury</term>
<term>Myocardium</term>
<term>Sarcoplasmic Reticulum</term>
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<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Calcium</term>
<term>Calcium-Transporting ATPases</term>
<term>Ischémie myocardique</term>
<term>Lésion de reperfusion myocardique</term>
<term>Myocarde</term>
<term>Réticulum sarcoplasmique</term>
<term>Sodium</term>
<term>Sodium-Potassium-Exchanging ATPase</term>
<term>Échangeur sodium-calcium</term>
</keywords>
<keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr"><term>Acide egtazique</term>
<term>Chélateurs</term>
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<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Jeûne</term>
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<term>Blood Pressure</term>
<term>In Vitro Techniques</term>
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<term>Rats</term>
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<front><div type="abstract" xml:lang="en">Fasting has been shown to limit ischemic injury and improve functional activity after global ischemia. Because calcium overload is considered a mechanism of ischemic injury, we hypothesized that fasting would limit the accumulation of intracellular calcium [Ca]i during ischemia, potentially due to reduced accumulation of intracellular sodium [Na]i.</div>
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<DateCreated><Year>2001</Year>
<Month>10</Month>
<Day>18</Day>
</DateCreated>
<DateCompleted><Year>2002</Year>
<Month>03</Month>
<Day>12</Day>
</DateCompleted>
<DateRevised><Year>2014</Year>
<Month>11</Month>
<Day>20</Day>
</DateRevised>
<Article PubModel="Print"><Journal><ISSN IssnType="Print">0300-8428</ISSN>
<JournalIssue CitedMedium="Print"><Volume>96</Volume>
<Issue>5</Issue>
<PubDate><Year>2001</Year>
<Month>Sep</Month>
</PubDate>
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<Title>Basic research in cardiology</Title>
<ISOAbbreviation>Basic Res. Cardiol.</ISOAbbreviation>
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<ArticleTitle>Fasting limits the increase in intracellular calcium during ischemia in isolated rat hearts.</ArticleTitle>
<Pagination><MedlinePgn>463-70</MedlinePgn>
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<Abstract><AbstractText Label="INTRODUCTION" NlmCategory="BACKGROUND">Fasting has been shown to limit ischemic injury and improve functional activity after global ischemia. Because calcium overload is considered a mechanism of ischemic injury, we hypothesized that fasting would limit the accumulation of intracellular calcium [Ca]i during ischemia, potentially due to reduced accumulation of intracellular sodium [Na]i.</AbstractText>
<AbstractText Label="METHODS" NlmCategory="METHODS">To address this hypothesis, hearts isolated from rats fed either a normal diet or fasted for 24 hours underwent 20 min of global ischemia at 37 degrees. In addition to functional parameters, [Na]i and [Ca]i were measured using 21Na and 19F spectroscopy using thulium-DOTP-5 and 5F-BAPTA, respectively. In vitro measurement of sarcoplasmic reticulum calcium uptake and release, as well as activity of the sarcolemmal Na-Ca exchanger, was performed in hearts from fed and fasted animals under baseline and ischemic conditions.</AbstractText>
<AbstractText Label="RESULTS" NlmCategory="RESULTS">Hearts from fasted animals showed greater recovery of developed pressure (37+/-9 vs. 11+/-6 cm H2O, p < 0.05) and less contracture (end-diastolic pressure 25+/-2 vs. 47+/-2 cm H2O, p < 0.05) by the end of the reperfusion period. [Na]i was similar in the 2 groups during the first half of the ischemic period, albeit with a higher concentration of [Na]i in hearts from fed compared to fasted animals at reperfusion. Fasting markedly limited calcium accumulation during ischemia, with end-ischemic calcium being 419+/-46 nM in the hearts from fasted animals and 858+/-140 nM in the hearts from fed animals (p < 0.01). There was no significant effect of fasting on calcium uptake or release by the SR, nor on sarcolemmal Na-Ca exchange activity.</AbstractText>
<AbstractText Label="CONCLUSIONS" NlmCategory="CONCLUSIONS">Fasting for 24 hours improves functional recovery and markedly limits [Ca]i accumulation during ischemia and early reperfusion. The mechanism for this phenomenon remains to be elucidated.</AbstractText>
</Abstract>
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