SCREENING ON BLOOD SUGER-LOWERING COMPONENTS FROM CORN SILK
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摘要: 采用正丁醇、乙酸乙酯分别萃取玉米须醇提物得正丁醇萃取物(BF)和乙酸乙酯萃取物(EF),并分析其主要功能性成分含量及其对四氧嘧啶所致糖尿病小鼠的影响。结果表明:玉米须正丁醇萃取物和乙酸乙酯萃取物能够明显改善糖尿病小鼠“体质量减少及血糖增高”症状,显著降低其空腹血糖值(P< 0.05),并显著提高糖尿病小鼠对葡萄糖的耐受能力(P< 0.01),且正丁醇萃取物效果优于乙酸乙酯萃取物;正丁醇萃取物中总皂苷、总黄酮和总多酚含量均高于乙酸乙酯萃取物的,正丁醇萃取物中黄酮苷化合物A和B的含量均高于乙酸乙酯萃取物的,且两种萃取物中黄酮苷化合物B含量较高。这表明玉米须正丁醇萃取物降血糖效果较好,其主要降糖成分为皂苷、黄酮,黄酮类化合物中以单体化合物B为主。Abstract: N-butanol alcohol extract (BF) and ethyl acetate extract (EF) were extracted by using n-butanol and ethyl acetate from alcohol extract of corn silk respectively in this paper.The main functional components and their effects on alloxan-induced diabetic mice were analyzed.The results showed that both of BF and EF could obviously improve the symptoms of "weight loss and blood sugar increase",reduce the fasting blood glucose concentration significantly (P<0.05) and improve the glucose tolerance of diabetic mice significantly (P<0.01).Furthermore,the effect of n-butanol extract was better than that of ethyl acetate extract.The contents of total saponins,total flavonoids and total polyphenols in n-butanol extract were higher than those of ethyl acetate extract.The same trend was observed in the contents of the flavones glycoside A and B,and the latter had higher contents in the two extractions.It was concluded that the n-butanol extract from corn silk had a better antidiabetic effect,and its main hypoglycemic components were saponins,flavonoids and polyphenols.In addition,monomer compound B is the main component in flavonoids.
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Keywords:
- corn silk /
- n-butanol extract /
- ethyl acetate extract /
- antidiabetics
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