期刊
BEHAVIOURAL BRAIN RESEARCH
卷 266, 期 -, 页码 108-118出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bbr.2014.02.044
关键词
Cocaine; N-acetylcysteine; Bulbectomy; Depression; Self-administration; Seeking-behavior
资金
- Operating Program of Innovative Economy (Poland) [POIG.01.01.02-12-004/09]
- statutory funds of the Institute of Pharmacology Polish Academy of Sciences, Krakow
Depression and substance-abuse (e.g., cocaine) disorders are common concurrent diagnoses. In the present study, we combined bilateral olfactory bulbectomy (OBX) with a variety of procedures of intravenous cocaine self-administration and extinction/reinstatement in rats. We also investigated the effects of N-acetylcysteine (NAC) on rewarding and seeking behaviors for cocaine in OBX rats and compared the drug's effects in sham-operated control animals (SHAM). The occurrence of depressive symptoms before introduction to cocaine self-administration enhanced subsequent cocaine-seeking behaviors but did not significantly influence cocaine's rewarding properties or extinction training. NAC (25-100 mg/kg) given acutely or repeatedly did not alter the co-occurrence of cocaine reward and depression but effectively reduced the cocaine-seeking behavior observed in both phenotypes. Our results indicate that depression behavior is linked to more pronounced drug craving and a higher propensity to relapse in rats. We also show the lack of efficacy of repeated NAC treatment on SHAM or OBX animals in terms of cocaine self-administration, while the drug was an effective blocker of cocaine-seeking behavior in both studied phenotypes, with a more pronounced drug effect observed in OBX animals. The last finding demonstrates the potential clinical utility of NAC to reduce cocaine seeking enhanced by co-existing depression. (C) 2014 Elsevier B.V. All rights reserved.
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