Antiarrhythmic activity of oximethers

Area of Science:

• Pharmacology
• Medicinal Chemistry
• Cardiovascular Research

Background:

• Ventricular arrhythmia poses a significant threat to cardiovascular health.
• Developing effective antiarrhythmic agents with favorable safety profiles is crucial.

Purpose of the Study:

• To synthesize and evaluate a series of 2-substituted-cycloalkanone-oxime / 2-hydroxy-3-dialkylamino/- propylether derivatives.
• To identify potent and safe compounds for the treatment of aconitine-induced ventricular arrhythmia.

Main Methods:

• Synthesis of over sixty novel chemical entities.
• In vivo testing using an aconitine-induced ventricular arrhythmia rat model.
• Structure-activity relationship (SAR) analysis to guide compound optimization.

Main Results:

• Cyclohexane derivatives incorporating a diisopropylamine moiety demonstrated superior antiarrhythmic activity.
• EGIS-3966 exhibited significant efficacy, with ED50 values of 1.21 mg/kg (intravenous) and 27.3 mg/kg (oral).
• EGIS-3966 displayed a favorable toxicity profile compared to other tested compounds.

Conclusions:

• The study identified potent cycloalkanone-oxime derivatives as potential antiarrhythmic agents.
• EGIS-3966 emerged as a lead candidate for further preclinical and clinical development.
• Structure-activity relationship insights provide a foundation for future drug design in this class.