By : Mostafa El-Sheekh1, Nanis G. Allam1, Naglaa Ibrahim Sarhan2 and Ghada Alfakharany1

Abstract

Oxidants are free radicals that find in the environment, but they are also produced naturally in our body. Antioxidants have an important role in the body health and protected from many diseases caused by free radicals. The unique characters of probiotic bacteria make it used extensively in the field of medicine antioxidant, anticancer, anti-microbial, anti-diabetic, anti-inflammatory properties and hepatoprotective agent. This study was designed to explore the influence of lactic acid bacteria as antioxidative agents. Antioxidative properties for all tested stains were investigated through determination scavenging activity of α,α-Diphenyl-β-Picrylhydrazyl (DPPH), hydroxyl radicals (OHˉ) and inhibition of lipid peroxidation in rat liver homogenate in vitro. The present findings revealed that, Lactobacillus plantarum subsp. plantarum DSMZ 20174 and Lactobacillus acidophilus DSMZ 20079 T possessed the highest antioxidant properties, tolerated acidity up to 4 and revealed viability under bile salt concentration up to 0.5%. The results of this study provide new insights into the lactic acid bacteria with antioxidative properties as they tolerated acidity up

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