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http://dx.doi.org/10.5187/JAST.2006.48.5.719

Effect of Whey Protein Isolate and Lactobacillus spp. Cell Extracts on Intracellular Antioxidative Activities in Human Prostate Epitherial Cells  

변정열 (Departmnet of Animalscience and Technology, Chung-Ang University)
윤영호 (Departmnet of Animalscience and Technology, Chung-Ang University)
Publication Information
Journal of Animal Science and Technology / v.48, no.5, 2006 , pp. 719-726 More about this Journal
Abstract
Bovine whey protein are rich in cysteine, which is the rate limiting amino acid for synthesis of antioxidant glutathione(GSH). Some strains of Lactobacillus caseihas been reported to contain high level of GSH in cell extracts. The objective ofthis study was to determine whether enzymatically hydrolyzed whey protein isolate(WPI) and cell extract of Lb. casei HY2782 could increase intracellular GSH concentrations and protect against oxidant induced cell death in human prostate epithelial cell line (designated as RWPE1, and PC3MMM2 cells). Treatment of RWPE1 cellsandPC3MMM2 cells with hydrolyzed WPI (500g/ml) significantly increased GSH by28.2% and38.4% respectively. Compared with control cells receiving no hydrolyzed WPI(P<0.05). hydrolyzed WPI and Lb casei HY2782 cell extracts significantly protected RWPE1 and PC3MMM2 cellsfrom oxidant induced cell death compared with controls receiving no WPI. DNA damage associated with oxidant treatment was demonstrated by single cell gel (SCG) electrophoresis.
Keywords
Lb. casei; GSH; Oxidative stress; Prostate; Whey protein
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