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Distinct contractile and molecular differences between two goat models of atrial dysfunction: AV block-induced atrial dilatation and atrial fibrillation.

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Distinct contractile and molecular differences between two goat models of atrial dysfunction: AV block-induced atrial dilatation and atrial fibrillation. / Greiser, Maura; Neuberger, Hans-Ruprecht; Harks, Erik; El-Armouche, Ali; Boknik, Peter; de Haan, Sunniva; Verheyen, Fons; Verheule, Sander; Schmitz, Wilhelm; Ravens, Ursula; Nattel, Stanley; Allessie, Maurits A; Dobrev, Dobromir; Schotten, Ulrich.

In: J MOL CELL CARDIOL, Vol. 46, No. 3, 3, 2009, p. 385-394.

Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review

Harvard

Greiser, M, Neuberger, H-R, Harks, E, El-Armouche, A, Boknik, P, de Haan, S, Verheyen, F, Verheule, S, Schmitz, W, Ravens, U, Nattel, S, Allessie, MA, Dobrev, D & Schotten, U 2009, 'Distinct contractile and molecular differences between two goat models of atrial dysfunction: AV block-induced atrial dilatation and atrial fibrillation.', J MOL CELL CARDIOL, vol. 46, no. 3, 3, pp. 385-394. <http://www.ncbi.nlm.nih.gov/pubmed/19100271?dopt=Citation>

APA

Greiser, M., Neuberger, H-R., Harks, E., El-Armouche, A., Boknik, P., de Haan, S., Verheyen, F., Verheule, S., Schmitz, W., Ravens, U., Nattel, S., Allessie, M. A., Dobrev, D., & Schotten, U. (2009). Distinct contractile and molecular differences between two goat models of atrial dysfunction: AV block-induced atrial dilatation and atrial fibrillation. J MOL CELL CARDIOL, 46(3), 385-394. [3]. http://www.ncbi.nlm.nih.gov/pubmed/19100271?dopt=Citation

Vancouver

Greiser M, Neuberger H-R, Harks E, El-Armouche A, Boknik P, de Haan S et al. Distinct contractile and molecular differences between two goat models of atrial dysfunction: AV block-induced atrial dilatation and atrial fibrillation. J MOL CELL CARDIOL. 2009;46(3):385-394. 3.

Bibtex

@article{d4db5bd396b04507afd3f352932c2001,
title = "Distinct contractile and molecular differences between two goat models of atrial dysfunction: AV block-induced atrial dilatation and atrial fibrillation.",
abstract = "Atrial dilatation is an independent risk factor for thromboembolism in patients with and without atrial fibrillation (AF). In many patients, atrial dilatation goes along with depressed contractile function of the dilated atria. While some mechanisms causing atrial contractile dysfunction in fibrillating atria have been addressed previously, the cellular and molecular mechanisms of atrial contractile remodeling in dilated atria are unknown. This study characterized in vivo atrial contractile function in a goat model of atrial dilatation and compared it to a goat model of AF. Differences in the underlying mechanisms were elucidated by studying contractile function, electrophysiology and sarcoplasmic reticulum (SR) Ca2+ load in atrial muscle bundles and by analyzing expression and phosphorylation levels of key Ca2+-handling proteins, myofilaments and the expression and activity of their upstream regulators. In 7 chronically instrumented, awake goats atrial contractile dysfunction was monitored during 3 weeks of progressive atrial dilatation after AV-node ablation (AV block goats (AVB)). In open chest experiments atrial work index (AWI) and refractoriness were measured (10 goats with AVB, 5 goats with ten days of AF induced by repetitive atrial burst pacing (AF), 10 controls). Isometric force of contraction (FC), transmembrane action potentials (APs) and rapid cooling contractures (RCC, a measure of SR Ca2+ load) were studied in right atrial muscle bundles. Total and phosphorylated Ca2+-handling and myofilament protein levels were quantified by Western blot. In AVB goats, atrial size increased by 18% (from 26.6+/-4.4 to 31.6+/-5.5 mm, n=7 p",
author = "Maura Greiser and Hans-Ruprecht Neuberger and Erik Harks and Ali El-Armouche and Peter Boknik and {de Haan}, Sunniva and Fons Verheyen and Sander Verheule and Wilhelm Schmitz and Ursula Ravens and Stanley Nattel and Allessie, {Maurits A} and Dobromir Dobrev and Ulrich Schotten",
year = "2009",
language = "Deutsch",
volume = "46",
pages = "385--394",
journal = "J MOL CELL CARDIOL",
issn = "0022-2828",
publisher = "Academic Press Inc.",
number = "3",

}

RIS

TY - JOUR

T1 - Distinct contractile and molecular differences between two goat models of atrial dysfunction: AV block-induced atrial dilatation and atrial fibrillation.

AU - Greiser, Maura

AU - Neuberger, Hans-Ruprecht

AU - Harks, Erik

AU - El-Armouche, Ali

AU - Boknik, Peter

AU - de Haan, Sunniva

AU - Verheyen, Fons

AU - Verheule, Sander

AU - Schmitz, Wilhelm

AU - Ravens, Ursula

AU - Nattel, Stanley

AU - Allessie, Maurits A

AU - Dobrev, Dobromir

AU - Schotten, Ulrich

PY - 2009

Y1 - 2009

N2 - Atrial dilatation is an independent risk factor for thromboembolism in patients with and without atrial fibrillation (AF). In many patients, atrial dilatation goes along with depressed contractile function of the dilated atria. While some mechanisms causing atrial contractile dysfunction in fibrillating atria have been addressed previously, the cellular and molecular mechanisms of atrial contractile remodeling in dilated atria are unknown. This study characterized in vivo atrial contractile function in a goat model of atrial dilatation and compared it to a goat model of AF. Differences in the underlying mechanisms were elucidated by studying contractile function, electrophysiology and sarcoplasmic reticulum (SR) Ca2+ load in atrial muscle bundles and by analyzing expression and phosphorylation levels of key Ca2+-handling proteins, myofilaments and the expression and activity of their upstream regulators. In 7 chronically instrumented, awake goats atrial contractile dysfunction was monitored during 3 weeks of progressive atrial dilatation after AV-node ablation (AV block goats (AVB)). In open chest experiments atrial work index (AWI) and refractoriness were measured (10 goats with AVB, 5 goats with ten days of AF induced by repetitive atrial burst pacing (AF), 10 controls). Isometric force of contraction (FC), transmembrane action potentials (APs) and rapid cooling contractures (RCC, a measure of SR Ca2+ load) were studied in right atrial muscle bundles. Total and phosphorylated Ca2+-handling and myofilament protein levels were quantified by Western blot. In AVB goats, atrial size increased by 18% (from 26.6+/-4.4 to 31.6+/-5.5 mm, n=7 p

AB - Atrial dilatation is an independent risk factor for thromboembolism in patients with and without atrial fibrillation (AF). In many patients, atrial dilatation goes along with depressed contractile function of the dilated atria. While some mechanisms causing atrial contractile dysfunction in fibrillating atria have been addressed previously, the cellular and molecular mechanisms of atrial contractile remodeling in dilated atria are unknown. This study characterized in vivo atrial contractile function in a goat model of atrial dilatation and compared it to a goat model of AF. Differences in the underlying mechanisms were elucidated by studying contractile function, electrophysiology and sarcoplasmic reticulum (SR) Ca2+ load in atrial muscle bundles and by analyzing expression and phosphorylation levels of key Ca2+-handling proteins, myofilaments and the expression and activity of their upstream regulators. In 7 chronically instrumented, awake goats atrial contractile dysfunction was monitored during 3 weeks of progressive atrial dilatation after AV-node ablation (AV block goats (AVB)). In open chest experiments atrial work index (AWI) and refractoriness were measured (10 goats with AVB, 5 goats with ten days of AF induced by repetitive atrial burst pacing (AF), 10 controls). Isometric force of contraction (FC), transmembrane action potentials (APs) and rapid cooling contractures (RCC, a measure of SR Ca2+ load) were studied in right atrial muscle bundles. Total and phosphorylated Ca2+-handling and myofilament protein levels were quantified by Western blot. In AVB goats, atrial size increased by 18% (from 26.6+/-4.4 to 31.6+/-5.5 mm, n=7 p

M3 - SCORING: Zeitschriftenaufsatz

VL - 46

SP - 385

EP - 394

JO - J MOL CELL CARDIOL

JF - J MOL CELL CARDIOL

SN - 0022-2828

IS - 3

M1 - 3

ER -