The β3 subunit of the nicotinic acetylcholine receptor is required for nicotine withdrawal-induced affective but not physical signs or nicotine reward in mice

被引:5
|
作者
Jackson, Asti B. [1 ]
Toma, Wisam [1 ]
Contreras, Katherine M. [1 ]
Alkhlaif, Yasmin [1 ]
Damaj, M. Imad [1 ]
机构
[1] Virginia Commonwealth Univ, Dept Pharmacol & Toxicol, Bpx 980613, Richmond, VA 23298 USA
基金
美国国家卫生研究院;
关键词
SUCROSE PREFERENCE; ASSOCIATION; DEPENDENCE; GENES; CHRNB3; ACTIVATION; EXPRESSION; BEHAVIORS; SUBTYPES; NULL;
D O I
10.1016/j.pbb.2019.05.003
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
Nicotinic acetylcholine receptors (nAChRs) are the primary target for nicotine, the addictive component in tobacco products. These pentameric receptors are made up of various subunits which contribute to the diverse functions of nAChR subtypes. The beta 3 subunit of the nAChR has been understudied in nicotine dependence, even though it is expressed in brain regions important for drug reward. Therefore, we assessed nicotine dependence behaviors in beta 3 wildtype (WT) and knockout (KO) male and female mice. We evaluated nicotine reward in the conditioned place preference (CPP) test and then measured nicotine withdrawal signs after chronic exposure to the drug. For the withdrawal studies, mice were continuously infused with 24 mg/kg/day of nicotine using surgically implanted osmotic mini pumps for 14 days. Mini-pumps were removed at day 15, and withdrawal signs (somatic signs, hyperalgesia, anhedonia-like measure using the sucrose preference test and anxiety-like behaviors using the light dark boxes) were collected at 24 h intervals for three days following spontaneous withdrawal of nicotine. Nicotine-induced CPP did not differ between beta 3 KO and WT mice. beta 3 KO mice displayed similar somatic symptoms and hyperalgesia compared to WT mice but showed significant absence in affective (anhedonia and anxiety-like behaviors) withdrawal signs in nicotine-dependent mice. These observations suggest that the beta 3 nicotinic subunits do not seem to influence nicotine reward but plays an important role in affective nicotine withdrawal signs. Given the health burden of tobacco use disorder and the modest effect of smoking cessation aids, it is important to understand underlying factor contributing to nicotine dependence. The results of this study will further our knowledge of the role of the beta 3 nAChR subunit in nicotine reward and withdrawal behaviors in hopes of finding new molecular targets for smoking cessation aids.
引用
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页码:1 / 5
页数:5
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