The potent and selective dopamine D1 receptor agonist A-77636 increases cortical and hippocampal acetylcholine release in the rat.

Abstract:

:The effects of systemic administration of the full dopamine D1 receptor agonist A-77636 on acetylcholine release in rat frontal cortex and hippocampus were studied using in vivo microdialysis. Administration of A-77636 (4 mumol/kg s.c.) greatly (> 230%) increased both cortical and hippocampal acetylcholine release for more than 3 h; at a lower dose (1 mumol/kg s.c.) A-77636 significantly stimulated cortical but not hippocampal acetylcholine release. The effect of the higher dose of A-77636 on cortical acetylcholine release was blocked by the dopamine D1 receptor antagonist SCH 23390 (300 micrograms/kg s.c.). These results confirm that stimulation of dopamine D1 receptors facilitates cortical and hippocampal acetylcholine release in vivo, and indicate that these two structures are differentially sensitive to this effect. They also raise the possibility that dopamine D1 receptor agonists may be useful in the treatment of cortical and hippocampal acetylcholine deficit-related syndromes.

journal_name

Eur J Pharmacol

authors

Acquas E,Day JC,Fibiger HC

doi

10.1016/0014-2999(94)90013-2

subject

Has Abstract

pub_date

1994-07-21 00:00:00

pages

85-7

issue

1

eissn

0014-2999

issn

1879-0712

pii

0014-2999(94)90013-2

journal_volume

260

pub_type

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