Chronic neuroleptics alter the effects of the D1 agonist SK&F 38393 and the D2 agonist LY171555 on oral movements in rats.
Chronic neuroleptics alter the effects of the D1 agonist SK&F 38393 and the D2 agonist LY171555 on oral movements in rats.
复制标题
慢性精神安定药会改变 D1 激动剂 SK 的作用
DOI：
10.1007/bf00177570
复制
发表时间：
1988
影响因子：
3.4
通讯作者：
Gunne,L
中科院分区：
文献类型：
--
作者：
Ellison,G;Johansson,P;Levin,E;See,R;Gunne,L
Vacuous oral movements (OMs) in rats chronically administered haloperidol (HAL), fluphenazine (FLU), or no drug were studied following injections of one of three doses of either a D1 agonist (SK&F 38393) or a D2 agonist (LY171555). Oral movements were observed via closed-circuit television and simultaneously recorded using a computerized video analysis system which measured the distance between two fluorescent dots painted above and below the rat's mouth. SK&F 38393 induced a dose-dependent increase in tremorous oral movements and repetitive chewing movements in the controls; this effect was more pronounced in rats treated with chronic HAL or FLU, both during chronic neuroleptic treatment and even more so when they were tested after drug withdrawal following 5 or 14 months of chronic neuroleptic administration. Conversely, LY171555 produced an inhibition of oral activity at all dose levels in controls. This inhibition was attenuated during chronic administration of HAL or FLU, but returned to control levels (without any signs of supersensitivity) when the animals were retested shortly after discontinuation of neuroleptics. These results indicate that heightened oral movements in rodents following chronic neuroleptic administration can be more clearly induced by D1 than by D2 receptor activation.
