Cytosolic Free Calcium Transients Induced by Ergonovine in Cultured Vascular Smooth Muscle Cells

Author(s):  
H. Kanaide ◽  
M. Hasegawa ◽  
M. Nakamura
1987 ◽  
Vol 248 (3) ◽  
pp. 883-887 ◽  
Author(s):  
J Pfeilschifter ◽  
U T Rüegg

Pretreatment of rat vascular smooth muscle cells with the immunosuppressive drug cyclosporin A caused concentration- and time-dependent increases in both the amplitude and duration of the angiotensin II-induced rise in cytosolic free calcium, as measured with quin 2. Cyclosporin A had no significant effect on basal quin 2 fluorescence. However, cyclosporin A increased the basal 45Ca2+ influx. This stimulation of 45Ca2+ influx was not blocked by nifedipine (10(-6) M). Cyclosporin A also augmented the angiotensin II-stimulated influx and efflux of 45Ca2+. These results demonstrate that cyclosporin A increases the permeability of the plasma membrane for Ca2+ and also augments the angiotensin II-induced increases in cytosolic free calcium.


1997 ◽  
Vol 19 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Toshihiko Nakashima ◽  
Katsunobu Takenaka ◽  
Seiji Fukazawa ◽  
Akashi Ando ◽  
Noboru Sakai ◽  
...  

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