Dopamine D3 receptor density elevation in aged Fischer-344 x Brown-Norway (F1) rats.

Abstract:

:The density of dopamine D3 receptors was determined in young (4-month-old) and aged (37-month-old) Fischer-344 x Brown-Norway (F1) male rats using the putative D3 receptor-preferring agonist, [3H](+)-7.hydroxy-2-(N,N-di-n-propylamino)tetralin ([3H](+)-7-OH-DPAT). In the presence of the non-hydrolyzable GTP analog, 5'-guanylylimidodiphosphate (Gpp(NH)p), the density of dopamine D3 receptors in the striatum and nucleus accumbens was significantly increased (29-102%, respectively) in aged Fischer-344 x Brown-Norway (F1) rats compared to young adults. These findings suggest that dopaminergic activity in aged rats is compromised by increased D3 receptor density, resulting in altered striatal/nucleus accumbens function via presynaptic or postsynaptic modifications.

journal_name

Eur J Pharmacol

authors

Wallace DR,Booze RM

doi

10.1016/0014-2999(96)00354-8

subject

Has Abstract

pub_date

1996-07-25 00:00:00

pages

283-5

issue

3

eissn

0014-2999

issn

1879-0712

pii

0014299996003548

journal_volume

308

pub_type

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