On the mechanism of antifibrillatory effect of afobazole
S A Kryzhanovskyi1, V N Stolyaruck, M B Vititnova
1V. V. Zakusov Institute of Pharmacology, Russian Academy of Medical Sciences, Moscow, Russia. sak538@yandex.ru
Abstract:
Effect of afobazole on the threshold of electrical fibrillation of the heart was studied on anesthetized rats with intact myocardium. It was shown that the drug considerably increased the threshold of electrical fibrillation of the heart, being not inferior to reference class I antiarrhythmic drugs (lidocaine and procainamide) according to V. Williamse classification. Against the background of preliminary injection of σ-receptor antagonist haloperidol, afobazole exhibited no antifibrillatory activity. These findings and analysis of published reports suggest that antifibrillatory activity of afobazole is determined by its antagonistic influence on σ1-receptors localized in cardiomyocyte cytosol.
Related Concept Videos
Antiepileptic Drugs: Potassium Channel Activators
Ezogabine has gained approval as an adjunctive treatment...
Depolarizing Blockers: Mechanism of Action
Succinylcholine is the most commonly used depolarizing blocker. Chemically, it constitutes two molecules of acetylcholine joined together by an acetate methyl group. They act on the receptors in the same way as acetylcholine. Because succinylcholine...
Antiepileptic Drugs: GABAergic Pathway Potentiators
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for their...
Mechanism of Cardiac Arrhythmias
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers


