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- W1497924333 abstract "Background: Alcohol is frequently co‐abused with smoking. In humans, nicotine use can increase alcohol craving and consumption. The objectives of the current study were to assess the acute effects of nicotine on alcohol seeking and relapse at 2 different time points. Methods: Adult female alcohol‐preferring (P) rats were trained in 2‐lever operant chambers to self‐administer 15% ethanol (EtOH) (v/v) and water on a concurrent fixed‐ratio 5–fixed‐ratio 1 (FR5‐FR1) schedule of reinforcement in daily 1‐hour sessions. Following 10 weeks of daily 1‐hour sessions, rats underwent 7 extinction sessions, followed by 2 weeks in their home cages. Rats were then returned to the operant chambers without EtOH or water being present for 4 sessions (Pavlovian Spontaneous Recovery [PSR]). Rats were then given a week in their home cage before being returned to the operant chambers with access to EtOH and water (relapse). Nicotine (0, 0.1, 0.3, or 1.0 mg/kg) was injected subcutaneously immediately or 4 hours prior to PSR or relapse testing. Results: Injections of nicotine immediately prior to testing reduced (5 to 10 responses PSR; 50 to 60 responses relapse), whereas injections of nicotine 4 hours prior to testing increased (up to 150 responses for PSR; up to 400 responses for relapse with 1.0 mg/kg dose) responses on the EtOH lever during PSR and relapse tests. Conclusions: The results of this study demonstrate that acute effects of nicotine on EtOH‐seeking and relapse behaviors may be time dependent, with the immediate effects being a result of nicotine possibly acting as a substitute for EtOH, whereas with a delay of 4 hours, priming effects of nicotine alterations in nicotinic receptors, and/or the effects of nicotine’s metabolites (i.e., cotinine and nornicotine) may enhance the expression of EtOH‐seeking and relapse behaviors." @default.
- W1497924333 created "2016-06-24" @default.
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- W1497924333 date "2011-06-20" @default.
- W1497924333 modified "2023-10-17" @default.
- W1497924333 title "Nicotine Modulates Alcohol‐Seeking and Relapse by Alcohol‐Preferring (P) Rats in a Time‐Dependent Manner" @default.
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