alexa Protective effect of (-)-epigallocatechin gallate against advanced glycation endproducts-induced injury in neuronal cells.
Neurology

Neurology

Journal of Alzheimers Disease & Parkinsonism

Author(s): Lee SJ, Lee KW, Lee SJ, Lee KW

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Abstract Advanced glycation endproducts (AGEs) are believed to be secondary factors in the selective neuronal injury associated with several neurodegenerative disorders. In this study, we investigated the protective effects of (-)-epigallocatechin gallate (EGCG), a major monomer of green tea polyphenols, against AGEs-induced damage in neuron cells. The results showed that EGCG treatment protected against glyceraldehyde-derived AGE-induced neurotoxicity, which is associated with an increase in intracellular reactive oxygen species, as well as against decreases in intracellular catalase (CAT) and superoxide dismutase (SOD) activities. EGCG treatment also decreased malondialdehyde and carbonyl levels, and AGEs formation. Treatment with 10 muM EGCG upregulated SOD and CAT levels, whereas glutathione peroxidase activity was reduced. Furthermore, 5 muM EGCG was found to down-regulate the mRNA level of the AGE receptor (RAGE) in neuronal cells up to 2.5 fold, as determined by real time PCR. The results demonstrated that EGCG may exhibit protective effects against AGEs-induced injury in neuronal cells through its antioxidative properties, as well as by interfering with AGEs-RAGE interaction mediated pathways, suggesting a beneficial role for this tea catechin against neurodegenerative diseases.
This article was published in Biol Pharm Bull and referenced in Journal of Alzheimers Disease & Parkinsonism

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