Fig. 5. Inositol 1,4,5-triphosphate (IP3) formation in platelets after STA2stimulation in the presence of propofol ( open symbols ) or equivalent volume of Intralipos ( closed symbols )(n = 5–8 each). Data are expressed as mean ± SD. IP3level was significantly higher than that before stimulation at 15–30 s with Intralipos alone and at 5–30 s with 30 or 100 μM propofol after the stimulation. * P < 0.05 and ** P < 0.01 significantly different from that with equivalent volume of Intralipos.