The involvement of phosphoinositide 3-kinase (PI3-Kinase) and phospholipase C gamma (PLC gamma) pathway in the morphine-induced supraspinal antinociception in the mouse. - Narita,M.; Ohnishi,O.; Nemoto,M.; Aoki,T.; Suzuki,T. (Nihon Shinkei Seishin Yakurigaku Zasshi, 2001)