Upadhya, Sudarshan C. ; Ravindranath, Vijayalakshmi (2002) Detection and localization of protein-acetaldehyde adducts in rat brain after chronic ethanol treatment Alcoholism: Clinical and Experimental Research, 26 (6). pp. 856-863. ISSN 0145-6008
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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1530-...
Related URL: http://dx.doi.org/10.1111/j.1530-0277.2002.tb02615.x
Abstract
Background: Ethanol is metabolized to acetaldehyde in the cell, which is potentially deleterious because it can react with cellular proteins and form protein-acetaldehyde adducts, which can interfere with normal cellular function. Because the primary site of ethanol action is the brain, the present study was carried out to determine whether protein-acetaldehyde adducts are formed in rat brain after chronic ethanol administration. Methods: Rats were treated with ethanol for 1 year, and the formation of protein-acetaldehyde adducts was examined by immunoblot analysis and localized in brain by immunohistochemical analysis by using affinity purified antibody to acetaldehyde-hemocyanin adduct. Results: In the brain of rats administered ethanol for up to 1 year, protein-acetaldehyde adducts were detectable by immunoblot analysis. In brain, mitochondria was the primary site of adduct formation, unlike the liver, where the major protein-acetaldehyde adduct has been detected in the cytosol. Immunohistochemical localization of protein-acetaldehyde adducts in chronic ethanol-treated rat brain demonstrated the selective presence of adducts in cortical neurons, granule cell layer of dentate gyrus, neurons in the midbrain, and granular cell layers of cerebellum. Conclusions: These results demonstrate the significant formation of protein-acetaldehyde adducts in rat brain after ethanol ingestion. The modification of mitochondrial proteins in brain by protein-acetaldehyde adduct formation is significant because mitochondrial dysfunction has been implicated in neurodegeneration.
Item Type: | Article |
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Source: | Copyright of this article belongs to John Wiley and Sons. |
Keywords: | Cytochrome P4502E; Protein-acetaldehyde Adducts; Mitochondria; Brain; Ethanol |
ID Code: | 40658 |
Deposited On: | 24 May 2011 13:55 |
Last Modified: | 24 May 2011 13:55 |
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