Polysaccharides of Momordica charantia have been reported to be the primary bioactive components that confer its antioxidant activity. To some degree, antioxidants may provide beneficial effects on neuronal damage ind...Polysaccharides of Momordica charantia have been reported to be the primary bioactive components that confer its antioxidant activity. To some degree, antioxidants may provide beneficial effects on neuronal damage induced by seizures. However, the protective effects of Momordica charantia polysaccharides (MCPs) on seizures remain unclear. In this study, our purpose was to investigate the effects of MCPs on oxidative stress and neurodegeneration in an experimental Kainic acid (KA)-induced rat seizure model. MCPs treatments decreased the level of malondialdehyde (MDA) and increased the activities of superoxide dismutase (SOD) and catalase (CAT) in the hippocampus of the KA-induced animal model. Moreover, MCPs significantly attenuated KA-induced neuronal loss in the CA1 and CA3 hippocampal regions. Based on these results, MCPs exert neuroprotective effects by attenuating KA-induced neuronal damage in the brain through their free radical scavenging activities.展开更多
为评价动植物源天然产物的二肽基肽酶-Ⅳ(dipeptidyl peptidase-Ⅳ,DPP-Ⅳ)抑制活性,以苦瓜皂苷(momordica saponins,MS)、乳清蛋白胃蛋白酶水解物(whey protein pepsin hydrolysates,WPPHs)、乳清蛋白胰蛋白酶水解物(whey protein tryp...为评价动植物源天然产物的二肽基肽酶-Ⅳ(dipeptidyl peptidase-Ⅳ,DPP-Ⅳ)抑制活性,以苦瓜皂苷(momordica saponins,MS)、乳清蛋白胃蛋白酶水解物(whey protein pepsin hydrolysates,WPPHs)、乳清蛋白胰蛋白酶水解物(whey protein trypsin hydrolysates,WPTHs)为原料,采用单因素试验和响应面分析优化水解条件,再将MS与WPPHs、WPTH进行复配,结合模拟体外消化,探究DPP-Ⅳ抑制活性。结果表明,MS、WPPHs及WPTHs具有DPP-Ⅳ抑制活性,最佳水解条件为:当酶添加量4%、pH2.7酶解2h时,WPPHs的DPP-Ⅳ抑制率最高为15.43%;当酶添加量4%、pH 7.6酶解4 h时,WPTHs的DPP-Ⅳ抑制率最高为14.62%。苦瓜皂苷与乳清蛋白水解物具有协同对二肽基肽酶-Ⅳ抑制活性作用,当MS与WPPHs、WPTHs的复配体积比均为1:1时,显著高于两者单独累加(p<0.05)。经胃消化后,WPPHs的DPP-Ⅳ抑制率降低2.02%,MS和WPTHs的DPP-Ⅳ抑制率升高0.99%、7.01%;经肠道消化后,WPPHs的DPP-Ⅳ抑制率升高2.23%,而MS和WPTHs的DPP-Ⅳ抑制率降低4.12%、2.70%。研究结果可为天然动植物源产物协同对二肽基肽酶-Ⅳ抑制活性提供了基础性数据,为降血糖功能性产品的开发提供新的方向。展开更多
百合是一种药食同源的中药,在我国资源丰富,分布广泛,具有较高的开发利用价值。目前研究发现,百合含有甾体皂苷、多糖、酚酸甘油酯、生物碱、黄酮、氨基酸、磷脂及其他烷烃等成分,主要为多糖及甾体皂苷。药理研究表明,其具有抗肿瘤、抗...百合是一种药食同源的中药,在我国资源丰富,分布广泛,具有较高的开发利用价值。目前研究发现,百合含有甾体皂苷、多糖、酚酸甘油酯、生物碱、黄酮、氨基酸、磷脂及其他烷烃等成分,主要为多糖及甾体皂苷。药理研究表明,其具有抗肿瘤、抗抑郁、抗氧化、降血糖、抗疲劳与耐缺氧、免疫调节,抗炎,抑制Na+/K+ATP酶等作用。百合可抑制多种癌细胞增殖,并促进其凋亡,主要活性成分为多糖、甾体皂苷及生物碱。其中甾体皂苷还是百合抗抑郁的活性成分。笔者通过检索中国知网,万方,Science Direct,Pub Med,Web of Science等数据库,对近30年有关百合的化学成分及药理作用的文献,进行整理,分析和总结,系统地综述了百合化学成分及药理作用的研究进展,旨在为百合的深入研究和开发利用提供理论参考。展开更多
文摘Polysaccharides of Momordica charantia have been reported to be the primary bioactive components that confer its antioxidant activity. To some degree, antioxidants may provide beneficial effects on neuronal damage induced by seizures. However, the protective effects of Momordica charantia polysaccharides (MCPs) on seizures remain unclear. In this study, our purpose was to investigate the effects of MCPs on oxidative stress and neurodegeneration in an experimental Kainic acid (KA)-induced rat seizure model. MCPs treatments decreased the level of malondialdehyde (MDA) and increased the activities of superoxide dismutase (SOD) and catalase (CAT) in the hippocampus of the KA-induced animal model. Moreover, MCPs significantly attenuated KA-induced neuronal loss in the CA1 and CA3 hippocampal regions. Based on these results, MCPs exert neuroprotective effects by attenuating KA-induced neuronal damage in the brain through their free radical scavenging activities.
文摘百合是一种药食同源的中药,在我国资源丰富,分布广泛,具有较高的开发利用价值。目前研究发现,百合含有甾体皂苷、多糖、酚酸甘油酯、生物碱、黄酮、氨基酸、磷脂及其他烷烃等成分,主要为多糖及甾体皂苷。药理研究表明,其具有抗肿瘤、抗抑郁、抗氧化、降血糖、抗疲劳与耐缺氧、免疫调节,抗炎,抑制Na+/K+ATP酶等作用。百合可抑制多种癌细胞增殖,并促进其凋亡,主要活性成分为多糖、甾体皂苷及生物碱。其中甾体皂苷还是百合抗抑郁的活性成分。笔者通过检索中国知网,万方,Science Direct,Pub Med,Web of Science等数据库,对近30年有关百合的化学成分及药理作用的文献,进行整理,分析和总结,系统地综述了百合化学成分及药理作用的研究进展,旨在为百合的深入研究和开发利用提供理论参考。
