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Antioxidant and gastrointestinal cytoprotective effect of edible polypeptide poly-gamma-glutamic acid

机译:可食用多肽多肽聚γ-谷氨酸的抗氧化剂和胃肠道细胞输出作用

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摘要

The antioxidant effects and cytoprotection of the poly-gamma-glutamic acid (gamma-PGA) were investigated. gamma-PGA with a molecular weight of similar to 400 kDa showed hydroxyl radical (OH center dot) averting capacity (HORAC), 85.2% at 1 mg/mL, which was caused by the chelation of transition metal ions and scavenging hydrogen peroxide. Moreover, this gamma-PGA showed 94.1% superoxide anion radical (O-2(center dot-)) scavenging and 96.0% lipid peroxidation inhibition activity at the same concentrations. The IC50 values were 130 +/- 42, 107 +/- 3.5 and 128 +/- 3.8 mu g/mL against OH center dot, O-2(center dot-) and lipid peroxidation, respectively. There was no significant variation in the HORAC of gamma-PGA after 9 h, the end point of the simulated digestion model. Furthermore, gamma-PGA showed a completely protective effect in Caco-2 cells and probiotic bacteria against oxidative damage at 1 mg/mL These data suggest that gamma-PGA has a potential use as a cytoprotectant in food and feed supplements, cosmetics and biomedical fields. (C) 2020 Elsevier B.V. All rights reserved.
机译:研究了多γ-谷氨酸(γ-PGA)的抗氧化效果和细胞保护。分子量与400kDa相似的γ-PGA显示羟基自由基(OH中心点)vietting Capacity(Horac),85.2%,1mg / ml,这是由过渡金属离子的螯合引起的,并释放过氧化氢。此外,这种γ-PGA显示出94.1%超氧化物阴离子自由基(O-2(中心点))清除和96.0%的脂质过氧化抑制活性以相同的浓度。 IC 50值分别为130 +/- 42,107 +/- 3.5和128 +/-3.8μg/ ml,分别对OH中心点,O-2(中心点)和脂质过氧化。在9小时后,γ-PGA的HORAC在模拟消化模型的终点之后没有显着变化。此外,γ-PGA在CaCO-2细胞和益生菌对氧化损伤的氧化损伤时显示出γ-PGA,这些数据的氧化损伤表明,γ-PGA具有作为食品和饲料补充剂,化妆品和生物医学领域的细胞保护剂的潜在用途。 (c)2020 Elsevier B.v.保留所有权利。

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