Short Communications
Effect of 6-Hydroxydopamine Treatment in the Area Postrema on Morphine-Induced Emesis in Ferrets
2002 年 89 巻 4 号 p. 422-425
詳細
2002 年 89 巻 4 号 p. 422-425
To investigate the role of catecholamine release in emesis, we examined the effects of pretreatment with 6-hydroxydopamine (6-OH-DA) administered into the area postrema in morphine-induced emesis in ferrets. In the 6-OH-DA pre-treated animals, the latency to the first emetic response induced by morphine hydrochloride (1.0 mg/kg, s.c.) was significantly prolonged and the number of retches and emetic episodes was markedly reduced. In the medulla oblongata, the levels of dopamine and homovanilic acid were reduced by 6-OH-DA pretreatment. These results suggest that catecholamine release in the medulla oblongata, mainly dopamine release, may play an important role in morphine-induced emesis in ferrets.
