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Induction of conditioned place preference and dopamine release by salsolinol in posterior VTA of rats: involvement of μ-opioid receptors.

Abstract：

:Salsolinol (Sal), locally administered into the posterior VTA (pVTA) of rats, produces psychomotor responses and reinforcing effects, probably, through the activation of μ-opioid receptors (MORs). The neurochemical correlates of these phenomena are, however, practically unknown. In this paper, we explore the neurochemical events and the mechanisms involved in these behaviors. To do that, we test the ability of Sal, directly microinjected into the pVTA, to induce conditioned place preference (CPP) and to increase dopamine levels in the nucleus accumbens shell. Bilateral injections of 30 pmol of Sal induced a strong CPP (rats spent around 70% of the total test time), a result that could be explained by the fact that Sal microinjected into the pVTA increased DA levels in the ipsilateral accumbens up to 141% of baseline. The local pretreatment with β-FNA, an antagonist of MORs, prevented this increase, supporting our hypothesis on the involvement of MORs in the Sal-derived effects.

journal_name

Neurochem Int

journal_title

Neurochemistry international

authors

Hipólito L,Martí-Prats L,Sánchez-Catalán MJ,Polache A,Granero L

doi

10.1016/j.neuint.2011.04.014

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

559-62

issue

5

eissn

0197-0186

issn

1872-9754

pii

S0197-0186(11)00172-0

journal_volume

59

pub_type

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