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投稿时间:2019-08-03
投稿时间:2019-08-03
中文摘要: 分别采用 Cu2+/H2O2、2,2'-偶氮二异丁基脒二盐酸盐[2,2'-azobis(2-amidinopropane)hydrochloride,AAPH]诱导牛血清白蛋白(bovine serum albumin,BSA)氧化和羰基化;Fe2+、偶氮二异庚腈 [2,2'-azobis(2,4-di-methylvaleronitrile),AMVN]诱导亚油酸(linoleic acid,LA)氧化及 AAPH 诱导鲱鱼精 DNA(herring sperm DNA,hsDNA)氧化损伤,研究迷迭香提取物对蛋白质、油脂以及DNA在自由基攻击下发生氧化损伤的抑制作用。结果表明:25 μg/mL~500 μg/mL的迷迭香提取物能显著抑制自由基诱导的BSA羰基化和LA氧化产物丙二醛(malondialdehyde,MDA)的生成(p<0.05);100 μg/mL~500 μg/mL 的迷迭香提取物能有效降低 AMVN 诱导的 LA 共轭二烯产物的生成;25 μg/mL~500 μg/mL的迷迭香提取物能显著抑制AAPH诱导的hsDNA氧化产物的生成。结论:迷迭香提取物能够有效抑制自由基诱导的蛋白质、油脂及DNA的氧化,其抑制作用随添加浓度的升高而增强。
Abstract:Oxidative damage was induced using several different systems to study the inhibition effect of rosemary extract(RE).Oxidation and carbonylation of bovine serum albumin (BSA)was induced by copper ions/hydrogen peroxide and 2,2'-azobis(2-amidinopropane)hydrochloride(AAPH),respectively.Oxidation of linoleic acid(LA)was induced by ferrous iron and 2,2'-azobis(2,4-di-methylvaleronitrile)(AMVN),and oxidative damage to herring sperm DNA (hsDNA)was induced by AAPH.The results showed that 25 μg/mL-500 μg/mL of RE could significantly inhibit the oxidative cleavage and carbonylation of protein as well as formation of malondialdehyde(MDA)during LA oxidation(p<0.05);and 100 μg/mL-500 μg/mL of RE could effectively reduce conjugated of LA induced by AMVN.Meanwhile,25 μg/mL-500 μg/mL of RE could also significantly inhibit hsDNA oxidative cleavage induced by AAPH.It concluded that RE had a strong effect against oxidative damage of protein,lipid,and DNA caused by free radical,and the inhibitory effect is enhanced with the increase of added concentration.
文章编号:202014004 中图分类号: 文献标志码:
基金项目:国家自然科学基金(31501491);河南省高等学校青年骨干教师培养计划(2017GGJS095)
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