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Changes of bcl-2 and bax mRNA expressions in the ethanol-treated mouse brain
Masashi Inoue1, Kazuhiko Nakamura, Kazuhiko Iwahashi
1Department of Neuropsychiatry, Faculty of Medicine, Kagawa Medical University, 1750-1, Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan.
Abstract:
To characterize the biochemical mechanism of cell death induced by ethanol intoxication, we examined expression of mRNAs of bcl-2 and bax genes in the brain, which are related to apoptosis, by using the reverse transcription-polymerase chain reaction method (RT-PCR). According to ethanol administrations, the expression of bcl-2 mRNA in the cerebral cortex decreased after 1 day and be recovered after 3 days. The expression of bcl-2 mRNA in the cerebellum was not changed soon after 1 day and increased after 3 days. The expression of bax mRNA in the cerebral cortex decreased after 1 day and be recovered after 3 days. The expression of bax mRNA in the cerebellum increased after 1 day and after 3 days. We found that bcl-2 or bax mRNA expressions in the brain were changed after short-term ethanol exposure. These results suggest that bcl-2 or bax may have functional significance about ethanol intoxication.
Insights
Ethanol intoxication alters brain gene expression related to cell death. Short-term alcohol exposure impacts bcl-2 and bax mRNA levels, suggesting their role in alcohol
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- Ethanol intoxication is a significant health concern.
- The molecular mechanisms underlying ethanol-induced cell death are not fully understood.
- Genes like bcl-2 and bax play critical roles in regulating apoptosis.
Purpose of the Study:
- To investigate the biochemical mechanisms of ethanol-induced cell death.
- To examine the expression of apoptosis-related genes (bcl-2 and bax) in the brain following ethanol exposure.
Main Methods:
- Utilized reverse transcription-polymerase chain reaction (RT-PCR) to quantify mRNA expression.
- Analyzed gene expression in the cerebral cortex and cerebellum of ethanol-exposed subjects.
Main Results:
- Ethanol administration altered bcl-2 mRNA expression in the cerebral cortex (decreased at 1 day, recovered at 3 days) and cerebellum (no change at 1 day, increased at 3 days).
- Ethanol administration altered bax mRNA expression in the cerebral cortex (decreased at 1 day, recovered at 3 days) and cerebellum (increased at 1 and 3 days).
- Short-term ethanol exposure significantly changed bcl-2 and bax mRNA levels in the brain.
Conclusions:
- The expression of bcl-2 and bax genes in the brain is modulated by short-term ethanol exposure.
- These findings suggest a potential functional role for bcl-2 and bax in the context of ethanol intoxication and its associated biochemical mechanisms.