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Small conductance calcium-activated potassium channel contributes to stress induced endothelial dysfunctions

Patients with Takotsubo syndrome displayed endothelial dysfunction, but underlying mechanisms have not been fully clarified. This study aimed to explore molecular signalling responsible for catecholamine excess induced endothelial dysfunction. Human cardiac microvascular endothelial cells were chall...

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Main Authors: Yang, Zhen (Author) , Li, Yingrui (Author) , Huang, Mengying (Author) , Li, Xin (Author) , Fan, Xuehui (Author) , Yan, Chen (Author) , Meng, Zenghui (Author) , Liao, Bin (Author) , Hamdani, Nazha (Author) , El-Battrawy, Ibrahim (Author) , Yang, Xiaoli (Author) , Zhou, Xiao-Bo (Author) , Akın, Ibrahim (Author)
Format: Article (Journal)
Language:English
Published: September 2024
In: Microvascular research
Year: 2024, Volume: 155, Pages: 1-11
ISSN:1095-9319
DOI:10.1016/j.mvr.2024.104699
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.mvr.2024.104699
Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S0026286224000487
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Author Notes:Zhen Yang, Yingrui Li, Mengying Huang, Xin Li, Xuehui Fan, Chen Yan, Zenghui Meng, Bin Liao, Nazha Hamdani, Ibrahim El-Battrawy, Xiaoli Yang, Xiaobo Zhou, Ibrahim Akin
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Summary:Patients with Takotsubo syndrome displayed endothelial dysfunction, but underlying mechanisms have not been fully clarified. This study aimed to explore molecular signalling responsible for catecholamine excess induced endothelial dysfunction. Human cardiac microvascular endothelial cells were challenged by epinephrine to mimic catecholamine excess. Patch clamp, FACS, ELISA, PCR, and immunostaining were employed for the study. Epinephrine (Epi) enhanced small conductance calcium-activated potassium channel current (ISK1-3) through activating α1 adrenoceptor. Phenylephrine enhanced edothelin-1 (ET-1) and reactive oxygen species (ROS) production, and the effects involved contribution of ISK1-3. H2O2 enhanced ISK1-3 and ET-1 production. Enhancing ISK1-3 caused a hyperpolarization, which increases ROS and ET-1 production. BAPTA partially reduced phenylephrine-induced enhancement of ET-1 and ROS, suggesting that α1 receptor activation can enhance ROS/ET-1 generation in both calcium-dependent and calcium-independent ways. The study demonstrates that high concentration catecholamine can activate SK1-3 channels through α1 receptor-ROS signalling and increase ET-1 production, facilitating vasoconstriction.
Item Description:Online verfügbar: 18. Juni 2024, Artikelversion: 21. Juni 2024
Gesehen am 18.03.2025
Physical Description:Online Resource
ISSN:1095-9319
DOI:10.1016/j.mvr.2024.104699

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