Purpose Oxidative damage induced by H2O2 treatment can irreversibly damage the lens epithelium, resulting in cell death and cataract. Grape seed extract (GSE) is a widely consumed dietary supplement that has the capability to scavenge oxidants and free radicals. GSE contain 70%–95% standardized proanthocyanidins. The study described herein investigated the protective effect of Grape seed proanthocyanidin extract (GSPE) on H2O2-induced oxidative stress in human lens epithelial B-3 (HLEB-3) cells and the possible molecular mechanism involved. Methods HLE-B3 cells exposed to different doses of H2O2 were cultured with various concentrations of GSPE and subsequently monitored for cell viability by the 4,5-dimethylthiazol-2-yl-2,5-diphenyltetrazolium bromide (MTT) assay. The apoptosis rate and ROS generation were detected by flow cytometric analysis. Expression of NF-кB/P65 and mitogen activated protein kinase (MAPK) proteins were measured by western blot. Results GSPE clearly reduced H2O2 induced cell apoptosis and reactive oxygen species (ROS) generation and protected HLEB-3 cells from H2O2 induced oxidative damage. GSPE depressed H2O2-induced activation and translocation of NF-кB/p65. GSPE also depressed H2O2-induced phosphorylation of the p38 and c-Jun N-terminal kinase (JNK) proteins of the MAPK family at various time points studied. Conclusions GSPE could be useful in attenuation of H2O2-induced oxidative stress and the activation of NF-кB and MAPK signaling in HLE-B3 cells, which suggests that GSPE has a potential protective effect against cataractogenesis.
Grape seed proanthocyanidin extract protects human lens epithelial cells from oxidative stress via reducing NF-кB and MAPK protein expression
Zhiyan Jia,Z. Song,Yuhui Zhao,Xiu-dong Wang,Ping Liu
Published 2011 in Molecular Vision
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- Publication year
2011
- Venue
Molecular Vision
- Publication date
2011-01-20
- Fields of study
Biology, Medicine, Environmental Science
- Identifiers
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- Source metadata
Semantic Scholar, PubMed
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