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HBK-10, A Compound with α1-Adrenolytic Properties, Showed Antiarrhythmic and Hypotensive Effects in Rats
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HBK-10, A Compound with α1-Adrenolytic Properties, Showed Antiarrhythmic and Hypotensive Effects in Rats
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Journal Article
HBK-10, A Compound with α1-Adrenolytic Properties, Showed Antiarrhythmic and Hypotensive Effects in Rats
2022
Overview
Arrhythmia, an irregular heartbeat, might be a life-threatening condition but also a risk factor for stroke or worsen the prognosis after myocardial infarction. The limited efficacy and proarrhythmic potential of the available drugs require searching for new, more effective, and safer pharmacotherapies. Studies indicate that the blockade of α1-adrenoceptors could be effective in treating heart rhythm abnormalities. In this study, we aimed to assess the antiarrhythmic and hypotensive potential of HBK-10, a novel 2-methoxyphenylpiperazine derivative, as well as its binding to the selected adrenergic receptors. Radioligand binding studies demonstrated that HBK-10 showed a high affinity for α1 but not for α2 or β1 receptors. Next, we evaluated the ability of HBK-10 to protect against an adrenaline-induced arrhythmia in rats. The compound showed potent prophylactic antiarrhythmic properties in this arrhythmia model. Notably, the compound did not show proarrhythmic potential in normotensive rats since it did not influence the ECG parameters at antiarrhythmic doses. Finally, the compound showed hypotensive properties in rats, which were not observed after coadministration with adrenaline, noradrenaline, or methoxamine, which suggests α1-adrenolytic properties of HBK-10. Our results confirm that compounds with a 2-methoxyphenylpiperazine group show a high affinity for α1-adrenoceptors and a significant antiarrhythmic effect. Given the promising results of our study, further evaluation of HBK-10 is necessary to unravel the mechanisms behind its pharmacological effects and evaluate the safety profile.
Publisher
MDPI AG,MDPI
Subject
