作　　者： ; ; ; ; ; ;

机构地区： 广东省农业科学院

出　　处： 《中国食品学报》 2014年第1期20-27,共8页

摘　　要： 比较桑椹、荔枝壳和紫心红薯3种植物资源的富含花青素提取物(MA、LPA和SPA)的抗氧化和降血脂活性。在分析3种提取物总酚和总花青素含量以及体外抗氧化活性基础上,采用高血脂动物模型研究其降血脂和体内抗氧化活性。3种提取物均采用大孔吸附树脂进行了纯化,其总酚含量分别为335.3,242.0,191.9 mg/g,总花青素含量分别为189.2,112.0,41.8 mg/g;在体外抗氧化活性方面,LPA的总抗氧化能力最强,其次是MA,SPA最弱。在降血脂活性方面,LPA降低总胆固醇和甘油三酯的能力最强,SPA和MA降总胆固醇和甘油三酯的活性相当;3种提取物均不能使高密度脂蛋白胆固醇含量显著降低,但都能显著降低低密度脂蛋白胆固醇含量,均使动脉粥样硬化指数AI1和AI2降低。此外,3种提取物均能显著提高高血脂模型大鼠的血清和肝脏抗氧化指数。3种植物来源的富含花青素的提取物均可用于抗氧化和降血脂功能食品的开发,其中尤以来源于荔枝壳和桑椹的提取物效果显著。 Antioxidant activities and hypolipidemic effects of three different anthocyanin-enriched extracts from mul- berry fruit（MA）, litchi pericarp（LPA） and purple sweet potato（SPA） were investigated. These three extracts were pre-pared with macroporous resins and their contents of total phenolic compounds were 335.3 mg/g, 242.0 mg/g and 191.9 mg/g, while their contents of total monomeric anthocyanins were 189.2mg/g, 112.0 mg/g and 41.8 rag/g, respectively. LPA exhibited the highest antioxidant activity, followed by MA and SPA. LPA had the strongest effect in lowering blood TC and TG, and then SPA and MA. All of the extracts increased significantly antioxidant indices of blood and liver of ani- mal models, reduced LDL-C, Air and AI2, and had no obvious effect on HDL-C. The comparative experiment showed that these three extracts could be used to develop functional foods with antioxidant activity and hypolipidemic effect, and extract from mulberry is the best choice considering the regulation of health food in China.

关 键 词： 花青素 抗氧化 降血脂 桑椹 紫心红薯 荔枝壳

领　　域： [轻工技术与工程] [轻工技术与工程]