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投稿时间:2020-09-23
投稿时间:2020-09-23
中文摘要: 采用 Cu2+/H2O2和 2,2′-偶氮二(2-甲基丙基咪)二盐酸盐[2,2′-azobis(2-methylpropionamidine)dihydrochloride,AAPH]两种不同的反应体系,分别诱导SD大鼠肝匀浆和脑匀浆、卵磷脂、亚油酸以及pBR322质粒DNA产生氧化损伤,建立脂质和DNA氧化损伤模型,考察核桃叶多糖对脂质和DNA氧化损伤的作用。通过硫代巴比妥酸法检测脂质过氧化程度;利用琼脂糖凝胶电泳检测pBR322质粒DNA氧化损伤程度。结果表明:核桃叶多糖在一定的浓度范围内对Cu2+/H2O2诱导的脂质和DNA氧化损伤有明显的保护作用;在AAPH诱导体系中,核桃叶多糖能明显抑制脂质和DNA氧化损伤,且呈浓度依赖性。
Abstract:Two different reaction systems utilizing Cu2+/H2O2and 2,2′-azobis(2-methylpropionamidine)dihydrochloride(AAPH)were used to induce lipid(including lipids from mouse liver and brain homogenates,lecithin,and liposomes)and DNA(pBR322 DNA)oxidative damage,to explore the effects of walnut leaf polysaccharides on free radical-induced lipid and DNA oxidative damage.The thiobarbituric acid method and agarose gel electrophoresis were used to detect the degree of lipid peroxidation and oxidative DNA damage,respectively.Within a certain concentration range,walnut leaf polysaccharides had a significant protective effect against Cu2+/H2O2-induced oxidative lipid and DNA damage.In an AAPH system,walnut leaf polysaccharides could significantly inhibit oxidative lipid and DNA damage in a concentration-dependent manner.
keywords: walnut leaf polysaccharides lipid DNA oxidative damage Cu2+/H2O2 2,2′-azobis(2-amidinopropane)dihydrochloride(AAPH)
文章编号:202118002 中图分类号: 文献标志码:
基金项目:山东省自然科学基金青年基金项目(ZR2014CQ002);淄博市校城融合计划发展项目(017ZBXC004);山东省自然科学基金项目(ZR2019BC104)
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