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Ethanol promotes T cell apoptosis through the mitochondrial pathway
Aditi A Kapasi1, Geeta Patel, Anuj Goenka
1Department of Medicine, Long Island Jewish Medical Center, New Hyde Park, NY 11040, USA.
Immunology
|February 27, 2003
Summary
Ethanol, or alcohol, significantly increases T cell apoptosis, a form of cell death. This study reveals alcohol promotes T cell death via the intrinsic mitochondrial pathway, impacting immune function.
Area of Science:
- Immunology
- Toxicology
- Cell Biology
Background:
- Acute ethanol intoxication is linked to lymphopenia.
- Ethanol has been previously associated with thymocyte apoptosis.
Purpose of the Study:
- To investigate the effect of ethanol on T cell apoptosis.
- To elucidate the molecular mechanisms underlying ethanol-induced T cell apoptosis.
Main Methods:
- Human T cells and Jurkat cells were analyzed for apoptosis after ethanol exposure.
- Gene expression (Bcl-2, Bax), cytochrome C translocation, and caspase activity were assessed.
- In vivo studies examined T cell apoptosis in subjects post-binge drinking.
Main Results:
- Ethanol significantly enhanced T cell apoptosis in both in vitro and in vivo models.
- Ethanol decreased Bcl-2 expression and increased Bax expression in T cells.
- Ethanol induced cytochrome C release and caspase-9 and caspase-3 activation, indicating intrinsic pathway involvement.
Conclusions:
- Ethanol promotes T cell apoptosis through the intrinsic mitochondrial pathway.
- Understanding this mechanism is crucial for addressing alcohol's impact on the immune system.