Effect of protein kinase C on K(V) channel in rat bronchial smooth muscle / 生理学报
Acta Physiologica Sinica
;
(6): 135-141, 2003.
Article
Dans Chinois
| WPRIM
| ID: wpr-318928
ABSTRACT
The effect of protein kinase C (PKC) signaling pathway on the activity of voltage-dependent delayed rectifier potassium channel (K(V)) and the expression of K(V) isoform K(V)1.5 in rat bronchial smooth cells (BSMCs) were investigated with whole-cell patch clamp, Western-blot and RT-PCR techniques. The results showed (1) phorbol 12-myristate 13-acetate (PMA), a PKC activator, caused a significant inhibition of K(V) channel currents in rat BSMCs. The inhibition was partly abolished by Ro31-8220, a PKC inhibitor. (2) PMA caused a significant suppression of the expression of K(V)1.5 mRNA and protein in rat BSMCs. These effects were attenuated by Ro31-8220. The results suggest that in rat BSMCs PKC activation inhibits K(V) currents and down-regulates the expression of K(V)1.5.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Pharmacologie
/
Physiologie
/
Protéine kinase C
/
Bronches
/
ARN messager
/
12-Myristate-13-acétate de phorbol
/
Cellules cultivées
/
Rat Sprague-Dawley
/
Techniques de patch-clamp
/
Biologie cellulaire
Limites du sujet:
Animaux
langue:
Chinois
Texte intégral:
Acta Physiologica Sinica
Année:
2003
Type:
Article
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