A water soluble polysaccharide (HPⅠ) was isolated from the Hericium caput-medusae and examined homogenously by Sephadex G-100 column chromatography,cellulose acetate film electrophoresis and specific optical rotation...A water soluble polysaccharide (HPⅠ) was isolated from the Hericium caput-medusae and examined homogenously by Sephadex G-100 column chromatography,cellulose acetate film electrophoresis and specific optical rotation measurement. This HPⅠconsists of Fuc,Glc and Gal in the molar ratios of 0.423∶1∶2.110. Its structural features were investigated by methylation and GC-MS analysis,periodate oxidation-Smith degradation,and partial acid-hydrolysis. In addition, enzymatic degradation experiments and GC analysis were applied. The following structure of the highly branched repeating unit was established: 6→)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→ 2 ↑ 1 2 ↑ 1 2 ↑ 1 Gal-(1→4)-Fuc Glc-(1→3)-Glc 2 Gal-(1→6)-Glc 3 The activities of HPⅠwere tested in mice. All the samples exhibited high effect of prevention and cure against chronic gastricism.展开更多
本研究采用体外模拟胃肠消化模型,分析了猴头菌子实体多酚类物质(polyphenol compounds from fruiting bodies of Hericium erinaceus,HEP)在模拟胃肠道消化(gastrointestinal digestion,GD)过程中总多酚和总黄酮的含量变化规律,并对其...本研究采用体外模拟胃肠消化模型,分析了猴头菌子实体多酚类物质(polyphenol compounds from fruiting bodies of Hericium erinaceus,HEP)在模拟胃肠道消化(gastrointestinal digestion,GD)过程中总多酚和总黄酮的含量变化规律,并对其酚酸和黄酮类物质的释放量及其体外抗氧化活性进行了比较,采用H2O2诱导RAW 264.7细胞氧化损伤模型,研究了HEP及其胃与肠消化产物对细胞氧化损伤的保护作用。结果表明:经胃消化的猴头菌子实体多酚类物质产物(HEP-S)与HEP相比,其总多酚和总黄酮含量分别上升了11.66%和27.33%,DPPH、ABTS和·OH自由基清除能力分别升高了10.33%、17.52%和2.22%。肠消化产物(HEP-I)与HEP相比,总多酚和总黄酮分别降低了35.82%和46.67%,DPPH、ABTS和·OH自由基清除能力分别降低了60.02%、50.13%和46.43%。液质联用(UPLC-MS/MS)的检测结果显示,HEP、HEP-S和HEP-I均由18种酚酸和2种黄酮组分组成,且在HEP-S和HEP-I中均无新物质检出。但与HEP相比,HEP-S和HEP-I中酚酸和黄酮组分的具体含量会存在明显差异。与化学抗氧化结果不同的是,与HEP相比,HEP-S对H2O2诱导的RAW 264.7细胞氧化损伤的保护作用不显著(P<0.05),而HEP-I对RAW 264.7细胞氧化的保护作用显著升高。展开更多
文摘A water soluble polysaccharide (HPⅠ) was isolated from the Hericium caput-medusae and examined homogenously by Sephadex G-100 column chromatography,cellulose acetate film electrophoresis and specific optical rotation measurement. This HPⅠconsists of Fuc,Glc and Gal in the molar ratios of 0.423∶1∶2.110. Its structural features were investigated by methylation and GC-MS analysis,periodate oxidation-Smith degradation,and partial acid-hydrolysis. In addition, enzymatic degradation experiments and GC analysis were applied. The following structure of the highly branched repeating unit was established: 6→)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→6)-Gal-(1→ 2 ↑ 1 2 ↑ 1 2 ↑ 1 Gal-(1→4)-Fuc Glc-(1→3)-Glc 2 Gal-(1→6)-Glc 3 The activities of HPⅠwere tested in mice. All the samples exhibited high effect of prevention and cure against chronic gastricism.