Fig. 4. Effects of various concentrations of propofol on intracellular concentrations of IP3([IP3]i) after the introduction of propofol (10−7–10−4m) during the condition of 20-min oxytocin incubation. Propofol significantly inhibited the increase in [IP3]iinduced by 20 nm oxytocin in a dose-dependent manner. Symbols represent mean ± SD (n = 6 at each point). *P < 0.05 versus control; †P < 0.05, ††P < 0.01 versus control with oxytocin alone.