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The antioxidant and protective properties of a synthetic soybean isoflavone (ISO) were investigated using sow mammary gland cell. Cells were cultured with 10, 20 and 30 uM ISO, respectively, under 80 uM FeSO4·7H2O/H2O2 conditions. After 48 h of incubation, the cells in the presence of ISO were lost less compared with that of control under oxidative damage by H2O2/FeSO4; ISO decreased the cell number at G1 and G2 stages, increased the cell number at S stage (all P < 0.05), it also reduced apoptosis of the cells (P < 0.01, P < 0.01, P < 0.05). The addition of ISO significantly promoted cell proliferation (P < 0.05) from 3rd to 6th days. Upon these, the activities of total superoxide dismutase (SOD), glutathione peroxidase (GPX), total antioxidant ability (T-AOC) also were increased and the activities of NADPH oxidase (NOX) decreased by ISO treatment (all P < 0.05). ISO decreased the concentration of ROS (P < 0.05) and MDA (P < 0.05). 10 uM, 20 uM, 30 uM ISO increased the relative mRNA abundance of SOD1 (all P < 0.05) and SOD2 (P < 0.05, P < 0.01, P < 0.05) and SOD3 (all P < 0.05); ISO significantly increased the relative mRNA abundance of GPX4 (all P < 0.01) and NOX4 (all P < 0.05), 20 uM ISO also increased the relative mRNA abundance of NOX2 (P < 0.05). It was concluded that supplementation of ISO enhanced the anti-oxidative function and prevented lipid peroxidation, possibly through the activation of the antioxidant enzymes and inhibition of cell apoptosis.

natural science

Isoflavone Ameliorates H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Induced Injury by Activating the Antioxidant System of Sow Mammary Gland Cell