Effects of glycyrrhetinic acid on sodium ion channel currents of rats' ventricular myocardial cells / 中国中西医结合杂志
Chinese Journal of Integrated Traditional and Western Medicine
; (12): 944-947, 2012.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-288481
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To study the effects of glycyrrhetinic acid (GA) on the sodium ion channel currents (I(Na)) of rats' ventricular myocardial cells, and to explore its anti-arrhythmic mechanisms at the ion channel level.</p><p><b>METHODS</b>Single ventricular myocardial cells was isolated from SD rats. The whole cell patch clamp was used to record the effects of GA on I(Na) of rats' ventricular myocardial cells.</p><p><b>RESULTS</b>GA could inhibit I(Na) of rats' ventricular myocardial cells dose-dependently. GA at 1, 5, and 10 micromol/L decreased I(Na) of rats' ventricular myocardial cells from (-4.26 +/- 0.15) nA to (-3.54 +/- 0.10) nA, (-2.19 +/- 0.09) nA, and (-1.25 +/- 0.08) nA, respectively. GA at 1, 5, and 10 micromol/L inhibited I(Na) by 16.08% +/- 2.3%, 50.82% +/- 3.56%, and 75.98% +/- 5.12%, showing statistical difference when compared with the control group (P < 0.05). GA at 10 micromol/L shifted I(Na) current-voltage curve more positively, but the activation potential and the peak potential were not changed.</p><p><b>CONCLUSION</b>GA inhibited the I(Na) of rats' ventricular myocardial cells dose-dependently, which was possibly associated with its antiarrhythmia effects.</p>
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Farmacologia
/
Fisiologia
/
Canais de Sódio
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Ratos Sprague-Dawley
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Técnicas de Patch-Clamp
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Biologia Celular
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Miócitos Cardíacos
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Ácido Glicirretínico
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Ventrículos do Coração
/
Metabolismo
Limite:
Animais
Idioma:
Chinês
Revista:
Chinese Journal of Integrated Traditional and Western Medicine
Ano de publicação:
2012
Tipo de documento:
Artigo