Women who smoke face significant health disparities as they are less able to quit smoking and experience exacerbated health risk with similar levels of tobacco exposure compared to men. Contributing to these disparities, medications based on the nicotinic acetylcholine system may not be as effective for women. Negative affect and stress regulation play a key role in the maintenance of and relapse to smoking in women, whereas men are differentially sensitive to the effects of nicotine reinforcement. F^harmacotherapy development targeted toward gender-sensitive aspects of smoking is a critical, yet underdeveloped area of research. The Yale-SCOR will probe the noradrenergic system's effects on stress-reactivity and nicotine reinforcement - hypothesizing that smoking activates different brain systems modulated by noradrenergic activity in women (PFC-amygdala axis) and men (mesolimbic dopamine system), and that guanfacine (an a2a adrenergic agonist) can preferentially target these gender-sensitive systems to improve smoking cessation outcomes. Using our validated human laboratory model to examine stress-induced smoking, preliminary data indicate that guanfacine preferentially counteracted stress effects on smoking in women and attenuated nicotine reinforcement in men. During a subsequent 4-week treatment phase, guanfacine significantly reduced smoking behavior in both women and men, suggesting that guanfacine has clinical utility for both genders. With input and feedback from Projects I and II, the primary aim of Project III is to conduct a Phase II double-blind, placebo-controlled study to examine gender differences in guanfacine's effect in 1) counteracting stress-induced smoking behavior and smoking-related reinforcement in the laboratory and 2) improving clinical outcomes during a subsequent brief treatment phase. We predict that guanfacine will improve treatment outcomes in women and men by targeting gender-sensitive mechanisms - by attenuating stress reactivity in women and reducing nicotine reinforcement in men. Importantly, we will examine gender differences in mechanisms underlying stress-precipitated smoking lapse and smoking- related reinforcement (e.g., craving, mood, withdrawal, cardiovascular reactivity, hypothalamus-pituitary- adrenal (HPA) axis reactivity, catecholamines, cognitive function).
The aims of Project III are highly integrated with Projects I and II, which are focused on identifying the underlying neurocircuitry and neurochemistry of guanfacine's effects on stress reactivity and nicotine reinforcement. Synthesis of findings across the three projects will identify new neurobiological targets for gender-sensitive therapeutics for smoking cessation.

Public Health Relevance

Women have poorer rates of smoking cessation and exacerbated health risk with similar levels of tobacco exposure compared to men, yet few attempts have been made to develop gender-sensitive smoking cessation treatments. This research contributes to the public health by establishing whether guanfacine demonstrates efficacy for smoking cessation by preferentially attenuating stress-induced smoking in women and reducing smoking-related reinforcement in men.

Agency
National Institute of Health (NIH)
Institute
National Institute on Drug Abuse (NIDA)
Type
Specialized Center (P50)
Project #
1P50DA033945-01
Application #
8367393
Study Section
Special Emphasis Panel (ZRG1-EMNR-Q (50))
Project Start
Project End
Budget Start
2012-07-01
Budget End
2013-06-30
Support Year
1
Fiscal Year
2012
Total Cost
$272,896
Indirect Cost
$108,501
Name
Yale University
Department
Type
DUNS #
043207562
City
New Haven
State
CT
Country
United States
Zip Code
06520
Mineur, Yann S; Einstein, Emily B; Bentham, Matthew P et al. (2015) Expression of the 5-HT1A serotonin receptor in the hippocampus is required for social stress resilience and the antidepressant-like effects induced by the nicotinic partial agonist cytisine. Neuropsychopharmacology 40:938-46
Mazure, Carolyn M; Weinberger, Andrea H; Pittman, Brian et al. (2014) Gender and stress in predicting depressive symptoms following stroke. Cerebrovasc Dis 38:240-6
Higley, Michael J; Picciotto, Marina R (2014) Neuromodulation by acetylcholine: examples from schizophrenia and depression. Curr Opin Neurobiol 29:88-95
Morris, Evan D; Lucas, Molly V; Petrulli, J Ryan et al. (2014) How to design PET experiments to study neurochemistry: application to alcoholism. Yale J Biol Med 87:33-54
Smith, Megan V; Ramsay, Christina; Mazure, Carolyn M (2014) Understanding disparities in subpopulations of women who smoke. Curr Addict Rep 1:69-74
Smith, Philip H; Young-Wolff, Kelly C; Hyland, Andrew et al. (2014) Are statewide restaurant and bar smoking bans associated with reduced cigarette smoking among those with mental illness? Nicotine Tob Res 16:846-54
Mineur, Yann S; Taylor, Seth R; Picciotto, Marina R (2014) Calcineurin downregulation in the amygdala is sufficient to induce anxiety-like and depression-like behaviors in C57BL/6J male mice. Biol Psychiatry 75:991-8
Weinberger, Andrea H; Smith, Philip H; Kaufman, Mira et al. (2014) Consideration of sex in clinical trials of transdermal nicotine patch: a systematic review. Exp Clin Psychopharmacol 22:373-83
Weinberger, Andrea H; Mazure, Carolyn M; McKee, Sherry A et al. (2014) The Association of Tobacco Use and Gender to Cardiac Rehabilitation Outcomes: A Preliminary Investigation. J Subst Use 19:171-175
Smith, Philip H; Mazure, Carolyn M; McKee, Sherry A (2014) Smoking and mental illness in the U.S. population. Tob Control 23:e147-53

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