Taxifolin Glycoside Blocks Human ether-a-go-go Related Gene K+ Channels
The Korean Journal of Physiology and Pharmacology
;
: 37-42, 2013.
Article
Dans Anglais
| WPRIM
| ID: wpr-728174
ABSTRACT
Taxifolin glycoside is a new drug candidate for the treatment of atopic dermatitis (AD). Many drugs cause side effects such as long QT syndrome by blocking the human ether-a-go-go related gene (hERG) K+ channels. To determine whether taxifolin glycoside would block hERG K+ channels, we recorded hERG K+ currents using a whole-cell patch clamp technique. We found that taxifolin glycoside directly blocked hERG K+ current in a concentration-dependent manner (EC50=9.6+/-0.7 microM). The activation curve of hERG K+ channels was negatively shifted by taxifolin glycoside. In addition, taxifolin glycoside accelerated the activation time constant and reduced the onset of the inactivation time constant. These results suggest that taxifolin glycoside blocks hERG K+ channels that function by facilitating activation and inactivation process.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Quercétine
/
Syndrome du QT long
/
Eczéma atopique
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
The Korean Journal of Physiology and Pharmacology
Année:
2013
Type:
Article
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