Eugenol delays the onset of ouabain-induced ventricular cardiac arrhythmias in guinea pigs

Author(s)

Teixeira-Fonseca, Jorge Lucas ; Santos-Miranda, Artur ; Marques, Ivan lobo Sousa ; Marques, Leisiane Pereira ; Alcantara, Fabiana ; Conceicao, Michael Ramon de Lima ; Souza, Diego Santos ; Gondim, Antonio Nei Santana ; Roman-Campos, Danilo

• Document type: Journal article
• Source: BASIC & CLINICAL PHARMACOLOGY & TOXICOLOGY; v. N/A, p. 11-pg., 2023-09-19.

Abstract

Eugenol is an aromatic compound used in the manufacture of medicines, perfumes, cosmetics and as an anaesthetic due to the ability of the drug to block the neuronal isoform of voltage-gated Na+ channels (NaV). Some arrhythmias are associated with gain of function in the sodium current (INa) found in cardiomyocytes, and antiarrhythmic sodium channel blockers are commonly used in the clinical practice. This study sought to elucidate the potential mechanisms of eugenol's protection in the arrhythmic model of ouabain-induced arrhythmias in guinea pig heart. Ex vivo arrhythmias were induced using 50 & mu;M of ouabain. The antiarrhythmic properties of eugenol were evaluated in the ex vivo heart preparation and isolated ventricular cardiomyocytes. The compound's effects on cardiac sodium current and action potential using the patch-clamp technique were evaluated. In all, eugenol decreased the ex vivo cardiac arrhythmias induced by ouabain. Furthermore, eugenol showed concentration dependent effect upon peak INa, left-shifted the stationary inactivation curve and delayed the recovery from inactivation of the INa. All these aspects are considered to be antiarrhythmic. Our findings demonstrate that eugenol has antiarrhythmic activity, which may be partially explained by the ability of eugenol to change de biophysical properties of INa of cardiomyocytes. (AU)

• FAPESP's process: 21/15122-0 - CARDIOTOXICITY INDUCED BY THE PESTICIDE TEBUCONAZOLE IN MICE: FROM CONCEPTION TO ADULT LIFE
• Grantee: Leisiane Pereira Marques
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 20/14635-1 - Modeling of monogenic diseases for physiopathological studies and pharmacological tests using specialized cells derived from iPSCs
• Grantee: João Bosco Pesquero
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 21/05584-7 - Assessment of acute and chronic toxicity of the heart and brain exposed to pesticides found in potable water in Brazil
• Grantee: Danilo Roman Campos
• Support Opportunities: Research Grants - Young Investigators Grants - Phase 2
• FAPESP's process: 19/18918-0 - Role of nitric oxide in cardiac arrhythmias during Hypothyroidism
• Grantee: Diego Santos de Souza
• Support Opportunities: Scholarships in Brazil - Post-Doctoral