Some aspects on the anatomy and function of central cholecystokinin systems.
The distribution of some cholecystokinin (CCK) systems in the rat brain is reviewed focusing on mesencephalic dopamine neurones which coexpress CCK and, in particular, on cortico-striatal CCK neurones which probably have glutamate as their co-transmitter. Functional studies based on the effect of several CCK(B) antagonists on phencyclidine-induced motility suggest that CCK is involved in locomotor behaviour causing inhibition in phencyclidine-treated habituated rats. In contrast, in unhabituated rats CCK stimulates exploratory behaviour. These effects may be related to the cortico-striatal CCK/glutamatergic pathway. Moreover, these studies provide evidence for endogenous release of a neuropeptide with behavioural consequences.
Hökfelt
Tomas
T
Department of Neuroscience, Karolinska Institutet, SE-171 77 Stockholm, Sweden. Tomas.Hokfelt@neuro.ki.se
Blacker
David
D
Broberger
Christian
C
Herrera-Marschitz
Mario
M
Snyder
Gretchen
G
Fisone
Gilberto
G
Cortés
Roser
R
Morino
Patrizia
P
You
Zhi-Bing
ZB
Ogren
Sen Ove
SO
D000818:Animals; D001345:Autoradiography; D001570:Benzodiazepinones / Q000494:pharmacology; D001921:Brain / Q000033:anatomy & histology / Q000187:drug effects / Q000378:metabolism; D002766:Cholecystokinin / Q000378:metabolism*; D010671:Phenylurea Compounds / Q000494:pharmacology; D051381:Rats; D011949:Receptors, Cholecystokinin / Q000037:antagonists & inhibitors
D001570:Benzodiazepinones; D010671:Phenylurea Compounds; D011949:Receptors, Cholecystokinin; C090649:L 740093; D002766:Cholecystokinin