In vivo cardiovascular profile of ryanodine receptor 2 inhibitor M201-A: Utility as an anti-atrial fibrillatory drug for patients suffering from heart failure with preserved ejection fraction.
J Pharmacol Sci
; 156(3): 171-179, 2024 Nov.
Article
in En
| MEDLINE
| ID: mdl-39313275
ABSTRACT
Atrial fibrillation (AF) and heart failure with preserved ejection fraction (HFpEF) often coexist; however, clinically available anti-AF drugs can exacerbate symptoms of HFpEF. M201-A suppressed ryanodine receptor-mediated diastolic Ca2+ leakage, possibly inhibiting common pathological processes toward AF and HFpEF. To bridge the basic information to clinical practice, we assessed its cardiohemodynamic, anti-AF and ventricular proarrhythmic profile using halothane-anesthetized dogs (n = 4). M201-A hydrochloride in doses of 0.03, 0.3 and 3 mg/kg/10 min was intravenously administered, providing peak plasma concentrations of 0.09, 0.81 and 5.70 µg/mL, respectively. The high dose of M201-A showed various cardiovascular actions. Namely, M201-A increased mean blood pressure and tended to enhance isovolumetric ventricular relaxation without suppressing ventricular contraction or decreasing cardiac output. M201-A enhanced atrioventricular conduction, but hardy affected intra-atrial/ventricular conduction. Importantly, M201-A prolonged effective refractory period more potently in the atrium than in the ventricle, indicating that it may become an atrial-selective antiarrhythmic drug. Meanwhile, M201-A prolonged QT interval/QTcV, and showed reverse frequency-dependent delay of ventricular repolarization. M201-A prolonged J-Tpeakc without prolonging Tpeak-Tend or terminal repolarization period, indicating the risk of causing torsade de pointes is negligible. Thus, M201-A is expected to become a hopeful therapeutic strategy for patients having pathology of both AF and HFpEF.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Atrial Fibrillation
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Stroke Volume
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Ryanodine Receptor Calcium Release Channel
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Heart Failure
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Anti-Arrhythmia Agents
Limits:
Animals
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Female
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Humans
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Male
Language:
En
Journal:
J Pharmacol Sci
Journal subject:
FARMACOLOGIA
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: