Alcoholism and alcohol abuse are major health problems and represent a tremendous financial burden on our society. A growing literature indicates that chronic alcohol exposure leads to an imbalance between central stress and anti-stress systems in key brain circuits that regulate emotional behavior. These imbalances can lead to pathological behavior, including increased anxiety, stress-responsivity and enhanced risk of relapse. Despite these advances identifying the role these systems play in alcohol related behaviors, there remains a gap in our knowledge of the fundamental biological, cellular and circuit mechanisms that contribute to this dysregulated behavior. In order to more effectively treat alcohol abuse, it is necessary to define the impact of chronic alcohol exposure on the in the circuitry that is critical for regulation of this behavior. Here, we propose to characterize the impact of chronic alcohol exposure on anti-stress systems, specifically neuropeptide Y (NPY) and GABAergic neuroactive steroids, in the amygdala and extended amygdala, brain regions critical for regulation of stress and anxiety-like behavior. Additionally, we will utilize inducible channel rhodopsin viruses in combination with neurochemically specific Cre-recombinase driver lines to determine the impact of chronic alcohol exposure on GABAergic circuits in these brain regions. In total, the proposed work will begin to define specific alcohol-induced cellular and circuit adaptations that are likely to play key roles in pathological behaviors associated with alcoholism.

Public Health Relevance

The focus of this project is to understand how alcohol exposure alters emotional behavior. Successful completion of this project will result in a greater understanding of how alcohol changes brain function. Further, these studies may provide insight as to how to develop more useful treatments for alcoholism and anxiety disorders.

Agency
National Institute of Health (NIH)
Institute
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
Type
Research Project--Cooperative Agreements (U01)
Project #
1U01AA020911-01
Application #
8231077
Study Section
Special Emphasis Panel (ZAA1-DD (51))
Program Officer
Liu, Qi-Ying
Project Start
2012-02-10
Project End
2017-01-31
Budget Start
2012-02-10
Budget End
2013-01-31
Support Year
1
Fiscal Year
2012
Total Cost
$185,000
Indirect Cost
$60,000
Name
University of North Carolina Chapel Hill
Department
Pharmacology
Type
Schools of Medicine
DUNS #
608195277
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
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Li, Chia; McCall, Nora M; Lopez, Alberto J et al. (2013) Alcohol effects on synaptic transmission in periaqueductal gray dopamine neurons. Alcohol 47:279-87