Psychopharmacology

, Volume 222, Issue 2, pp 269–276

Assessing the effects of chronic sazetidine-A delivery on nicotine self-administration in both male and female rats

Authors

  • Joshua E. Johnson
    • Department of Psychiatry and Behavioral SciencesDuke University Medical Center
  • Susan Slade
    • Department of Psychiatry and Behavioral SciencesDuke University Medical Center
  • Corinne Wells
    • Department of Psychiatry and Behavioral SciencesDuke University Medical Center
  • Ann Petro
    • Department of Psychiatry and Behavioral SciencesDuke University Medical Center
  • Hannah Sexton
    • Department of Psychiatry and Behavioral SciencesDuke University Medical Center
  • Amir H. Rezvani
    • Department of Psychiatry and Behavioral SciencesDuke University Medical Center
  • Milton L. Brown
    • Department of Pharmacology and PhysiologyGeorgetown University School of Medicine
  • Mikell A. Paige
    • Department of Pharmacology and PhysiologyGeorgetown University School of Medicine
  • Brian E. McDowell
    • Department of Pharmacology and PhysiologyGeorgetown University School of Medicine
  • Yingxian Xiao
    • Department of Pharmacology and PhysiologyGeorgetown University School of Medicine
  • Kenneth J. Kellar
    • Department of Pharmacology and PhysiologyGeorgetown University School of Medicine
    • Department of Psychiatry and Behavioral SciencesDuke University Medical Center
Original Investigation

DOI: 10.1007/s00213-012-2642-z

Cite this article as:
Johnson, J.E., Slade, S., Wells, C. et al. Psychopharmacology (2012) 222: 269. doi:10.1007/s00213-012-2642-z

Abstract

Rationale

Sazetidine-A is a selective α4β2 nicotinic receptor desensitizing agent and partial agonist. It has been shown in previous studies to significantly reduce nicotine self-administration in rats after acute or repeated injections. However, the effects of continuous chronic infusions of sazetidine-A on maintenance of nicotine self-administration and relapse after abstinence have yet to be examined.

Objectives

This study evaluated the efficacy of continuous sazetidine-A infusions (sc) over a period of 4 weeks to reduce nicotine self-administration in male and female Sprague-Dawley rats.

Methods

Sazetidine-A was administered via Alzet osmotic minipumps to young adult female and male rats at doses of 0, 2 or 6 mg/kg/day for 4 weeks. The effects of sazetidine-A on IV nicotine self-administration were examined in repeated 3-h sessions over the first 2 weeks of infusion followed by 1 week of forced abstinence from nicotine and 1 week of resumed nicotine access.

Results

The 6 mg/kg/day sazetidine-A dose significantly reduced overall nicotine self-administration compared with vehicle control across the sessions for both male (p < 0.001) and female (p < 0.05) rats. The lower 2 mg/kg/day sazetidine-A infusion dose was effective in reducing nicotine self-administration for male (p < 0.001), but not female rats. No attenuation in sazetidine-A effectiveness was seen over the course of the 4-week treatment. In the vehicle control group, male rats self-administered significantly (p < 0.001) more nicotine than females.

Conclusions

The continuing effectiveness of sazetidine-A in reducing nicotine self-administration in both male and female rats supports its promise as a new treatment to help people successfully quit smoking.

Keywords

NicotineSazetidine-AChronicSelf-administrationSex differences

Copyright information

© Springer-Verlag 2012