Dopamine D1/D5 receptor signaling is involved in arrhythmogenesis in the setting of takotsubo cardiomyopathy
BackgroundPrevious studies suggested involvement of non-ß-adrenoceptors in the pathogenesis of Takotsubo cardiomyopathy (TTC). This study was designed to explore possible roles and underlying mechanisms of dopamine D1/D5 receptor coupled signaling in arrhythmogenesis of TTC.MethodsHuman-induced plur...
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| Autores principales: | , , , , , , , , , , , |
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| Formato: | Article (Journal) |
| Lenguaje: | inglés |
| Publicado: |
04 February 2022
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| In: |
Frontiers in Cardiovascular Medicine
Year: 2022, Volumen: 8, Pages: 1-15 |
| ISSN: | 2297-055X |
| DOI: | 10.3389/fcvm.2021.777463 |
| Acceso en línea: | Verlag, kostenfrei, Volltext: https://doi.org/10.3389/fcvm.2021.777463 Verlag, kostenfrei, Volltext: https://www.frontiersin.org/article/10.3389/fcvm.2021.777463 
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| Notas de Autor: | Mengying Huang, Zhen Yang, Yingrui Li, Huan Lan, Lukas Cyganek, Goekhan Yuecel, Siegfried Lang, Karen Bieback, Ibrahim El-Battrawy, Xiaobo Zhou, Martin Borggrefe and Ibrahim Akin |
| Sumario: | BackgroundPrevious studies suggested involvement of non-ß-adrenoceptors in the pathogenesis of Takotsubo cardiomyopathy (TTC). This study was designed to explore possible roles and underlying mechanisms of dopamine D1/D5 receptor coupled signaling in arrhythmogenesis of TTC.MethodsHuman-induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) were challenged by toxic concentration of epinephrine (Epi, 0.5 mM for 1 h) for mimicking the catecholamine excess in setting of TTC. Specific receptor blockers and activators were used to unveil roles of D1/D5 receptors. Patch clamp, qPCR, and FACS analyses were performed in the study.ResultsHigh concentration Epi and two dopamine D1/D5 receptor agonists [(±)-SKF 38393 and fenoldopam] reduced the depolarization velocity and prolonged the duration of action potentials (APs) and caused arrhythmic events in iPSC-CMs, suggesting involvement of dopamine D1/D5 receptor signaling in arrhythmogenesis associated with QT interval prolongation in the setting of TTC. (±)-SKF 38393 and fenoldopam enhanced the reactive oxygen species (ROS)-production. H2O2 (100 μM) recapitulated the effects of (±)-SKF 38393 and fenoldopam on APs and a ROS-blocker N-acetylcysteine (NAC, 1 mM) abolished the effects, suggesting that the ROS-signaling is involved in the dopamine D1/D5 receptor actions. A NADPH oxidases blocker and a PKA- or PKC-blocker suppressed the effects of the dopamine receptor agonist, implying that PKA, NADPH oxidases and PKC participated in dopamine D1/D5 receptor signaling. The abnormal APs resulted from dopamine D1/D5 receptor activation-induced dysfunctions of ion channels including the Na+ and L-type Ca2+ and IKr channels.ConclusionsDopamine D1/D5 receptor signaling plays important roles for arrhythmogenesis of TTC. Dopamine D1/D5 receptor signaling in cardiomyocytes might be a potential target for treating arrhythmias in patients with TTC. |
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| Notas: | Gesehen am 04.03.2022 |
| Descripción Física: | Online Resource |
| ISSN: | 2297-055X |
| DOI: | 10.3389/fcvm.2021.777463 |