Related Experiment Videos
Homocysteine and alcoholism
S Bleich1, D Degner, K Javaheripour
1Department of Psychiatry, Georg-August-University of Göttingen, Federal Republic of Germany. stefan.bleich@t-online.de
Journal of Neural Transmission. Supplementum
|February 24, 2001
Summary
Chronic alcohol use damages the brain, potentially through elevated homocysteine levels. This neurotoxin may cause brain shrinkage and seizures by overstimulating NMDA receptors.
Area of Science:
- Neuroscience
- Toxicology
- Alcoholism Research
Background:
- Chronic alcohol consumption alters brain structure and function.
- The precise mechanisms of alcohol-induced brain damage are not fully understood.
- Partial recovery with abstinence suggests both functional and permanent neuronal damage occur.
Purpose of the Study:
- To investigate the role of sulfur amino acid metabolism in alcohol-related brain damage.
- To explore the link between homocysteine levels and alcohol withdrawal symptoms.
- To elucidate the neurotoxic mechanisms of homocysteine in alcoholism.
Main Methods:
- Analysis of sulfur amino acid metabolism in chronic alcohol consumers.
- Measurement of excitatory amino acid (EAA) neurotransmitters and homocysteine levels during alcohol withdrawal.
- Assessment of homocysteine's neurotoxic effects, including NMDA receptor stimulation and free radical production.
Main Results:
- Elevated homocysteine and EAA neurotransmitter levels were observed in patients withdrawing from alcohol.
- Homocysteine was found to induce neuronal cell damage.
- Homocysteine neurotoxicity involves NMDA receptor overstimulation and free radical generation.
Conclusions:
- Derangements in sulfur amino acid metabolism, particularly elevated homocysteine, are linked to chronic alcoholism.
- Homocysteine neurotoxicity via NMDA receptor overstimulation may contribute to alcohol-induced brain shrinkage and withdrawal seizures.