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The mGluR2 Positive Allosteric Modulator, AZD8529, and Cue-Induced Relapse to Alcohol Seeking in Rats
Linköpings universitet, Centrum för social och affektiv neurovetenskap (CSAN). Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Medicinska fakulteten.
NIAAA, MD USA.
NIAAA, MD USA.
Linköpings universitet, Centrum för social och affektiv neurovetenskap (CSAN). Linköpings universitet, Institutionen för klinisk och experimentell medicin. Linköpings universitet, Medicinska fakulteten.
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2016 (engelsk)Inngår i: Neuropsychopharmacology, ISSN 0893-133X, E-ISSN 1740-634X, Vol. 41, nr 12, s. 2932-2940Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Group II metabotropic glutamate receptors (mGluR2 and mGluR3) may control relapse of alcohol seeking, but previously available Group II agonists were unable to discriminate between mGluR2 and mGluR3. Here we use AZD8529, a novel positive allosteric mGluR2 modulator, to determine the role of this receptor for alcohol-related behaviors in rats. We assessed the effects of AZD8529 (20 and 40 mg/kg s.c.) on male Wistar rats trained to self-administer 20% alcohol and determined the effects of AZD8529 on self-administration, as well as stress-induced and cue-induced reinstatement of alcohol seeking. The on-target nature of findings was evaluated in Indiana P-rats, a line recently shown to carry a mutation that disrupts the gene encoding mGluR2. The behavioral specificity of AZD8529 was assessed using self-administration of 0.2% saccharin and locomotor activity tests. AZD8529 marginally decreased alcohol self-administration at doses that neither affected 0.2% saccharin self-administration nor locomotor activity. More importantly, cue- but not stress-induced alcohol seeking was blocked by the mGluR2 positive allosteric modulator. This effect of AZD8529 was completely absent in P rats lacking functional mGluR2s, demonstrating the receptor specificity of this effect. Our findings provide evidence fora causal role of mGluR2 in cue induced relapse to alcohol seeking. They contribute support for the notion that positive allosteric modulators of mGluR2 block relapse-like behavior across different drug categories.

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NATURE PUBLISHING GROUP , 2016. Vol. 41, nr 12, s. 2932-2940
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URN: urn:nbn:se:liu:diva-132468DOI: 10.1038/npp.2016.107ISI: 000385212700015PubMedID: 27339394OAI: oai:DiVA.org:liu-132468DiVA, id: diva2:1046281
Merknad

Funding Agencies|National Institute on Drug Abuse; National Institute on Alcohol Abuse and Alcoholism; Swedish Research Council

Tilgjengelig fra: 2016-11-13 Laget: 2016-11-12 Sist oppdatert: 2019-02-11

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