GABA(A) receptors and alcohol
Ingrid A Lobo1, R Adron Harris
1Waggoner Center for Alcohol and Addiction Research, Section of Neurobiology and Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX 78712, United States.
Pharmacology, Biochemistry, and Behavior
|April 22, 2008
Summary
Ethanol enhances GABAergic neurotransmission, particularly through extrasynaptic receptors. This action influences alcohol consumption and may play a role in alcoholism development.
Area of Science:
- Neuroscience
- Pharmacology
- Genetics
Background:
- GABAergic neurotransmission is crucial for ethanol's behavioral effects.
- Ethanol (alcohol) enhances GABAergic neurotransmission at low to moderate concentrations.
- Identifying specific GABA receptor subunits sensitive to ethanol in vivo and in vitro is key.
Purpose of the Study:
- To investigate which GABA receptor subunits are sensitive to low ethanol concentrations.
- To understand the behavioral actions of alcohol mediated by enhanced GABAergic neurotransmission.
- To explore the role of GABAergic mechanisms in alcohol consumption and alcoholism.
Main Methods:
- Review of existing literature spanning over 30 years.
- Analysis of studies involving knock-out and knock-in mice.
- Genetic analysis of human alcoholics.
Main Results:
- Recent evidence suggests extrasynaptic GABA receptors are sensitive to low ethanol concentrations.
- Studies indicate GABAergic actions are involved in regulating alcohol consumption.
- Genetic approaches are identifying links between GABAergic function and alcoholism.
Conclusions:
- Extrasynaptic GABA receptors are implicated in ethanol's effects.
- GABAergic neurotransmission plays a significant role in modulating alcohol intake.
- Further research into GABAergic mechanisms could inform alcoholism treatment and prevention.
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