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N-acetylcysteine decreased nicotine reward-like properties and withdrawal in mice

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Abstract

Rationale

N-acetylcysteine can increase extrasynaptic glutamate and reduce nicotine self-administration in rats and smoking rates in humans.

Objectives

The aim of this study was to determine if N-acetylcysteine modulates the development of nicotine place conditioning and withdrawal in mice.

Methods

N-acetylcysteine was given to nicotine-treated male ICR mice. Experiment 1: reward-like behavior. N-acetylcysteine (0, 5, 15, 30, or 60 mg/kg, i.p.) was given 15 min before nicotine (0.5 mg/kg, s.c.) or saline (10 ml/kg, s.c.) in an unbiased conditioned place preference (CPP) paradigm. Conditioning for highly palatable food served as control. Experiment 2: spontaneous withdrawal. The effect of N-acetylcysteine (0, 15, 30, 120 mg/kg, i.p.) on anxiety-like behavior, somatic signs, and hyperalgesia was measured 18–24 h after continuous nicotine (24 mg/kg/day, 14 days). Experiment 3: mecamylamine-precipitated, withdrawal-induced aversion. The effect of N-acetylcysteine (0, 15, 30, 120 mg/kg, i.p.) on mecamylamine (3.5 mg/kg, i.p.)-precipitated withdrawal was determined after continuous nicotine (24 mg/kg, i.p., 28 days) using the conditioned place aversion (CPA) paradigm.

Results

Dose-related reductions in the development of nicotine CPP, somatic withdrawal signs, hyperalgesia, and CPA were observed after N-acetylcysteine pretreatment. No effect of N-acetylcysteine was found on palatable food CPP, anxiety-like behavior, or motoric capacity (crosses between plus maze arms). Finally, N-acetylcysteine did not affect any measure in saline-treated mice at doses effective in nicotine-treated mice.

Conclusions

These are the first data suggesting that N-acetylcysteine blocks specific mouse behaviors associated with nicotine reward and withdrawal, which adds to the growing appreciation that N-acetylcysteine may have high clinical utility in combating nicotine dependence.

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Acknowledgments

MSB is supported by the Alcohol Beverage Medical Research Foundation, a Center for Translational Research Award (UL1 TR000058), the National Institutes for Alcohol Abuse and Alcoholism (P50 AA022537), and ABMRF/The Foundation for Alcohol Research. MID is supported by the National Institutes for Drug Abuse (R01 DA032246 and R21 DA032246).

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Authors and Affiliations

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Correspondence to M. S. Bowers.

Ethics declarations

Experiments were performed during the light cycle and were approved by the Institutional Animal Care and Use Committee of Virginia Commonwealth University and followed the National Institutes of Health Guidelines for the Care and Use of Laboratory Animals.

Disclosures

The authors declare that they have no competing interests.

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Bowers, M.S., Jackson, A., Maldoon, P.P. et al. N-acetylcysteine decreased nicotine reward-like properties and withdrawal in mice. Psychopharmacology 233, 995–1003 (2016). https://doi.org/10.1007/s00213-015-4179-4

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  • DOI: https://doi.org/10.1007/s00213-015-4179-4

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