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Alcoholism: allostasis and beyond
1Department of Neuropharmacology, The Scripps Research Institute, La Jolla, California 92037, USA. gkoob@scripps.edu
Alcoholism, Clinical and Experimental Research
|February 27, 2003
Summary
Alcoholism involves brain changes in reward and stress systems, leading to compulsive drinking. Understanding these neurobiological mechanisms in animal models offers insights into human alcohol dependence and relapse vulnerability.
Area of Science:
- Neurobiology
- Addiction Science
Background:
- Alcoholism is a chronic, relapsing disorder with compulsive drinking and impaired function.
- Animal models are crucial for studying addiction stages like withdrawal, craving, and abstinence.
Purpose of the Study:
- To explore the neurobiological mechanisms underlying alcoholism development.
- To utilize an allostatic framework to understand reward function changes in excessive drinking.
Main Methods:
- Neuropharmacologic studies in animal models.
- Examination of brain reward and stress circuits, including the extended amygdala and neurotransmitter systems (GABA, opioids, glutamate, serotonin, dopamine).
Main Results:
- Chronic alcohol use dysregulates neurotransmitter systems within the extended amygdala.
- Brain stress systems, like corticotropin-releasing factor and neuropeptide Y, are implicated in alcohol dependence.
- Allostatic changes in reward and stress systems contribute to relapse vulnerability.
Conclusions:
- The allostatic model integrates neuroadaptations and genetic vulnerability in alcoholism.
- This model aids in translating animal study findings to human alcohol addiction.
- Understanding these systems is key to developing effective treatments for recovering alcoholics.