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Hwa, Lara S; Kalinichev, Mikhail; Haddouk, Hasnaa; Poli, Sonia; Miczek, Klaus A
Psychopharmacology, 01/2014, Letnik: 231, Številka: 2Journal Article
Rationale: A promising pharmacotherapy for alcohol use disorders has been positive allosteric modulators (PAMs) of the gamma -aminobutyric acid receptor B (GABA sub(B) R) since GABA sub(B) R PAMs reduce ethanol drinking and self-administration in rodents. Objective: The current studies investigated a novel, selective GABA sub(B) R PAM, ADX71441, in comparison to naltrexone in a protocol of ethanol binge-like drinking, drinking-in-the-dark (DID), and in a model of long-term, excessive drinking, intermittent access to ethanol (IA). Methods: Male C57BL/6 J mice were given doses of ADX71441 (3, 10, 30 mg/kg, p.o.) before the fourth test day of repeated DID access to 20 % ethanol. Another group of mice had a history of 4 weeks of IA before ADX71441 (3, 10, 17 mg/kg, p.o.) treatment. The opioid antagonist, naltrexone (0.1, 1, 10 mg/kg, i.p.), was administered to different groups of mice in both protocols as a positive control. Results: In both DID and IA protocols, ADX71441 showed a selective and potent reduction of ethanol drinking, but not water drinking, while naltrexone had a more modest and transient effect on reducing ethanol drinking. The long-lasting effect of ADX71441 agrees with its plasma pharmacokinetics in showing peak concentrations at 2 h followed by a slow decay lasting well beyond 8 h. Conclusions: These findings support previous studies demonstrating that GABA sub(B) R PAMs decrease voluntary ethanol intake without altering water intake. ADX71441 may be a worthwhile candidate for developing a treatment of alcoholism, yet its site of action in the brain and long-term pharmacological effects require further exploration.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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