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.
出处
《中国实验方剂学杂志》
CAS
北大核心
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)
关键词
山核桃
总黄酮苷元
球松素查尔酮
总酚
抗氧化
Carya cathayensis
total flavonoid aglycones
pinostrobin chalcone
total phenol
antioxidation