Journal
SYNAPSE
Volume 65, Issue 1, Pages 84-89Publisher
WILEY
DOI: 10.1002/syn.20845
Keywords
stress; DA; [C-11]raclopride; [C-11]MNPA; positron emission tomography (PET); monkey brain
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It has been reported that stress and facilitation of dopamine neuronal system are closely related. In the present study, the effects of stress on the binding of antagonist- based [C-11]raclopride and agonist-based (R)-2-CH3O-N-n- propylnorapomorphine ([C-11] MNPA) to D-2/D-3 receptors were evaluated in the striatum of conscious monkey brain. The stress state assessed from plasma cortisol level was negatively correlated with [C-11] raclopride binding as expected. It was noteworthy that [C-11] MNPA binding exhibited a positive correlation with stress state; thus, the animals with higher cortisol levels showed higher binding to D-2/D-3 receptors. Synapse 65:84-89, 2011. (C) 2010Wiley-Liss, Inc.
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