KCl-Depolarization Potentiates the Ca2+ Sensitization by Endothelin-1 in Canine Coronary Artery
1992 年 60 巻 4 号 p. 403-405
詳細
1992 年 60 巻 4 号 p. 403-405
In Ca2+-free solution containing endothelin-1 (ET-1), depolarization by high KCl increased the force of contraction without any changes in intracellular calcium concentration ([Ca2+]i) in canine coronary artery. The [Ca2+]i-force relationships were examined in the absence or presence of ET-1 in 5 or 90 mM KCl. The relation curve in the presence of ET-1 in 90 mM KCl-PSS was shifted to the left and upward compared with that in 5 mM KCl. These results suggest that KCl-depolarization potentiates the Ca2+ sensitization by ET-1.
