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Abstract Title:

Mitigative effects of epigallocatechin gallate in terms of diminishing apoptosis and oxidative stress generated by the combination of lead and amyloid peptides in human neuronal cells.

Abstract Source:

J Biochem Mol Toxicol. 2019 Nov ;33(11):e22393. Epub 2019 Sep 13. PMID: 31518035

Abstract Author(s):

Neelima Ayyalasomayajula, Rajanna Ajumeera, Chetty S Chellu, Suresh Challa

Article Affiliation:

Neelima Ayyalasomayajula

Abstract:

Environmental exposure to lead (Pb) is reported to associate with the development of Alzheimer's disease, where the formation ofβ-amyloid peptides (APs) of (1-40), (1-42), and (25-35) is considered as the major risk factor. In this context, we aimed at investigating the effect of epigallocatechin gallate (EGCG), a major flavonoid polyphenol available in green tea, in mitigating the individual and combined toxicity generatedby Pb and β-APs in terms of oxidative stress and apoptosis in human neuronal cells. SH-SY5Y cells were exposed to Pb and β-APs of (1-40) and (25-35) individually and in different combinations in the presence and absence of EGCG. The results indicated that EGCG mitigated both Pb- and β-AP-inducedoxidative stress in scavenging reactive oxygen species and apoptosis by improving the expression levels of Bax and bcl2 and inhibiting annexin V and caspase-3. Thus, our study shows that EGCG protects SH-SY5Y cells against the cytotoxicity induced by Pb and β-APs by decreasing oxidative stress andinhibiting apoptosis.

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