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作 者:徐敏[1] 沈勇[1] 张坤[1] 刘楠楠[1] 蒋福升[1] 丁志山[1]
机构地区:[1]浙江中医药大学生命科学学院,杭州310053
出 处:《中国实验方剂学杂志》2013年第22期204-208,共5页Chinese Journal of Experimental Traditional Medical Formulae
基 金:国家自然科学基金项目(81303258);浙江省新苗人才计划项目(2008R40G2120013;2012R410057);浙江省医药卫生科技计划项目(2012KYB136)
摘 要:目的:测定山核桃叶总黄酮苷元(TFA)及其主要单体成分——球松素查尔酮(PSC)的抗氧化活性。方法:采用柱层析法分离、富集山核桃叶中的总黄酮苷元及单体化合物球松素查尔酮;测定总黄酮苷元中总酚含量,通过1,1-二苯基-2-三硝基苯肼(DPPH)自由基实验、铁离子还原/抗氧化能力(FRAP)测定法、抗脂质过氧化(LPO)实验、抗蛋白氧化羰基(PCO)生成实验,对TFA和PSC进行体外抗氧化活性研究。结果:富集的山核桃叶总黄酮苷元中总酚含量用没食子酸当量(GAE)表示为(283.75±10.82)mg·g-1;TFA和PSC对DPPH自由基清除的抑制浓度(IC50)分别为(20.05±1.74),(11.66±0.61)mg·L-1,抑制脂质过氧化的IC50分别为(74.62±5.39),(24.38±1.24)mg·L-1,抑制蛋白过氧化的IC50分别为(174.29±11.26),(86.74±7.89)mg·L-1;TFA和PSC均具有较强的抗氧化能力;除了对铁离子还原力外,其他各项指标化合物PSC均显著强于TFA。结论:山核桃叶中含有较高含量的黄酮苷元,其富集的总黄酮苷元具有较强的抗氧化活性,已知成分大于50%,而球松素查尔酮是其主要药效物质,值得进一步开发应用。Objective:To determine the antioxidant activity of the total flavonoid aglycones (TFA) and its main component pinostrobin chalcone (PSC) separated from the leaves of Caryr cathayensis (LCC).Method:Polyamide column chromatography was used to extract TFA and PSC; the antioxidant activity of TFA and PSC against 2,2-diphenyl-l-picry lhydrazyl (DPPH),ferric reducing antioxident power (FRAP),lipid peroxide (LPO) and protein carbonylation (PCO) was assayed.Result:Total phenol content of TFA was equivalent (mg ·g-1 extract) to 283.75 mg (gallic acid equivalent) ·g-1.The scavenging of DPPH of TFA and PSC are (20.05 ± 1.74),(11.66 ±0.61) mg ·L-1.The inhibiting of LPO of TFA and PSC are (74.62 ±5.39),(24.38 ±1.24) mg ·L-1.The inhibiting of PCO of TFA and PSC are (174.29 ± 11.26),(86.74 ±7.89) mg ·L-1.The antioxidant assay indicated that both TFA and PSC had a strong antioxidant activity,and except the FRAP activity,all other assay results manifested that the antioxidant activity of PSC was significantly stronger than that of TFA.Conclusion:The leaves of C.cathayensis with high amount of TFA,which with great antioxidant activity,and the compound PSC was the main active component,which was worthy to be further exploited.
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