2012
DOI: 10.1016/j.jacc.2012.01.060
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Cyclic Adenosine Monophosphate Phosphodiesterase Type 4 Protects Against Atrial Arrhythmias

Abstract: PDE4 is critical in controlling cAMP levels and thereby Ca(2+) influx and release in human atrial muscle, hence limiting the susceptibility to arrhythmias.

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Cited by 112 publications
(145 citation statements)
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“…This indicates that PDE4 is of particular importance in controlling hiPSC-CM beating frequency. A critical role for PDE4 has also been suggested in human heart based on the observations that inhibition of PDE4 in atrial myocytes increases Ca spark frequency and initiates spontaneous Ca waves [74], and that the PDE4D isoform immunoprecipitates with the cardiac RyR2 channel in heart extracts [75]. In the "intracellular Ca clock" model of cardiac pacemaking, such tight relationship between PDE4, RyR2, and Ca spark frequency would ensure a crucial role for PDE4 in controlling heart rate [76].…”
Section: Discussionmentioning
confidence: 99%
“…This indicates that PDE4 is of particular importance in controlling hiPSC-CM beating frequency. A critical role for PDE4 has also been suggested in human heart based on the observations that inhibition of PDE4 in atrial myocytes increases Ca spark frequency and initiates spontaneous Ca waves [74], and that the PDE4D isoform immunoprecipitates with the cardiac RyR2 channel in heart extracts [75]. In the "intracellular Ca clock" model of cardiac pacemaking, such tight relationship between PDE4, RyR2, and Ca spark frequency would ensure a crucial role for PDE4 in controlling heart rate [76].…”
Section: Discussionmentioning
confidence: 99%
“…Toutefois, il a été montré que la PDE4 contrôle les taux d'AMPc et l'amplitude d'I Ca,L dans les myocytes atriaux humains. De plus, l'inhibition de la PDE4 potentialise l'effet d'une stimulation -AR ou d'une inhibition de PDE3 sur la force de contraction dans des fibres atriales humaines [32].…”
Section: Régulation Du Cec Par Les Pde4unclassified
“…La diminution d'activité de ces PDE conduit à une augmentation de l'accumulation d'AMPc sous stimulation  2 -AR, à l'hyperphosphorylation des canaux LTCC et du PLB, et à une augmentation de la libération spontanée de Ca 2+ dans les myocytes déficients pour PI3K [36]. Dans les fibres atriales humaines, l'inhibition sélective de la PDE3, mais aussi celle de la PDE4, augmentent les arythmies provoquées par la stimulation des récepteurs -AR [32]. Au niveau cellulaire, l'inhibition de la PDE4 augmente la libération spontanée de Ca 2+ du RS et active l'échangeur Na + /Ca 2+ , ce qui produit un courant entrant dépolarisant qui peut être à l'origine de postdépolarisations tardives et d'activités déclenchées [32].…”
Section: Revuesunclassified
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