Abstract:
:The calcitonin-gene receptor peptide (alphaCGRP) receptor is present in high levels in the caudal striatum of the rat. Previous behavioural experiments have highlighted a possible correlation between alphaCGRP-mediated effects and the dopaminergic system. In this study, we examined the effect of alphaCGRP on K(+)-evoked [(3)H]-dopamine release in a slice preparation of the rat caudal striatum. The unstimulated release of [(3)H]-dopamine was not affected by alphaCGRP. However, alphaCGRP increased the release of [(3)H]-dopamine evoked by K(+) (30 mM) in a concentration-dependent manner. The stimulatory effect of alphaCGRP was blocked by the CGRP1 antagonist hCGRP(8-37) (without effect on its own). The stimulatory effect of 1 microM alphaCGRP was blocked by dizocilpine (MK-801), suggesting that excitatory transmission is involved in mediating the facilitated release. This study suggests that the peptide alphaCGRP, modulates dopamine release in the rat caudal striatum probably indirectly via glutamatergic transmission.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Maneuf YP,McKnight ATdoi
10.1016/s0304-3940(01)02056-0keywords:
subject
Has Abstractpub_date
2001-09-14 00:00:00pages
73-6issue
2-3eissn
0304-3940issn
1872-7972pii
S0304394001020560journal_volume
310pub_type
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