Inhibitory effect of sildenafil on hypoxia-induced enhancement of resting [Ca
, CPA-induced ER release and SOC-mediated Ca
influx. A: Representative records of resting [Ca2+]i, cyclopiazonic acid (CPA)-induced ER Ca2+ release and SOC-mediated Ca2+ entry upon changing perfusion from Ca2+-free PSS to 1.8 mM Ca2+ PSS were measured in different groups. B: The statistic data of resting [Ca2+]i, CPA-inducted ER release, and CCE are expressed as the mean ± SEM. ###
P < 0.001 vs. normoxia, * P < 0.05 vs. hypoxia, *** P < 0.001 vs. hypoxia.