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Updated: Mar 28, 2026
12:09
Methods for Intravenous Self Administration in a Mouse Model
Published on: December 8, 2012
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Intravenous Nicotine Self-Administration in Smokers: Dose-Response Function and Sex Differences
Kevin P Jensen1, Elise E DeVito1, Gerald Valentine1
1Department of Psychiatry, School of Medicine, Yale University, VA Connecticut Healthcare System, West Haven, CT, USA.
Summary
Male and female smokers show different responses to nicotine dosing. Men prefer lower nicotine doses, while women
Area of Science:
- Neuroscience
- Pharmacology
- Addiction Research
Background:
- Sex differences in nicotine sensitivity may impact tobacco dependence vulnerability.
- Understanding these differences is crucial for developing targeted smoking cessation strategies.
Purpose of the Study:
- To investigate sex-specific dose-response functions for nicotine's reinforcing and subjective effects in smokers.
- To compare how nicotine self-administration varies by dose in males and females.
Main Methods:
- A randomized, double-blind, crossover study involving 12 male and 14 female smokers.
- Subjects received intravenous nicotine (0.1–0.4 mg) or saline infusions.
- Nicotine self-administration was assessed via a forced-choice paradigm; physiological and subjective responses were monitored.
Main Results:
- A significant sex-by-dose interaction was found in nicotine self-administration.
- Male smokers showed a negative correlation between nicotine dose and self-administration, preferring lower doses.
- Females did not exhibit a significant dose-preference relationship; diastolic blood pressure increased dose-dependently in males but not females.
Conclusions:
- Demonstrates distinct sex differences in nicotine self-administration near the reinforcement threshold.
- Suggests that male and female smokers may differentially respond to varying nicotine doses.
- Highlights the need for sex-specific approaches in understanding and treating tobacco dependence.
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