Intracerebroventricular administration of cholecystokinin reduces stereotypy in dopamine supersensitive rats
Braz. j. med. biol. res
;
28(3): 351-4, Mar. 1995. graf
Article
in English
| LILACS
| ID: lil-154703
RESUMO
Cholecystokinin (CCK-8) coexists with dopamine in some neurons and modulates dopaminergic neurotransmission. In the present study we determined the effect of CCK-8 on stereotyped behavior in supersensitive dopaminergic system. Adult male Wistar rats, weighing 200-250 g, were used. Dopaminergic supersensitivity was induced by long-term haloperidol (HAL) treatment (30 days 1.0 mg/kg twice a day). Seventy-two hours after HAL withdrawal animals received CCK-8 (14.5 nmol/5 µl) or saline intracerebroventricularly (icv) before being tested for apomorphine (APO, 0.6 mg/kg, sc)-induced stereotyped behavior. experimental groups were long-term HAL-treated rats that received saline (HSAL, N = 9) or CCK-8 (HCCK, N = 11) icvand long-term saline-treated rats that received CCK-8(SCCK,N = 9) or saline (SSAL, N = 8) icv. As expected, HSAL rats showed statistically significant higher stereotypy scores than SSAL rats (42 + or - 1.7 vs 31 + or - 1.6; P<0.05) and CCK-8 icv reduces stereotypy in dopaminergic-supersensitive rats, and suggest that the dopamine supersensitivity phenomenon can be modulated by CCK-8
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Index:
LILACS (Americas)
Main subject:
Sincalide
/
Stereotyped Behavior
/
Cholecystokinin
Limits:
Animals
Language:
English
Journal:
Braz. j. med. biol. res
Journal subject:
Biology
/
Medicine
Year:
1995
Type:
Article
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