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百合多糖对Ⅰ型糖尿病大鼠的降血糖作用 被引量:49

Hypoglycemic Effect of Lily Polysaccharides in Type Ⅰ Diabetic Rats
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摘要 目的:探讨百合多糖对I型糖尿病大鼠的降血糖作用。方法:从新鲜百合中提取出百合多糖,采用离子交换层析和凝胶层析纯化得到3种多糖;优选碱洗百合多糖、以链脲佐菌素诱导建立I型糖尿病大鼠模型,通过百合多糖治疗,比较治疗前后大鼠体质量及空腹血糖的变化、测定治疗后胰岛素水平以及己糖激酶、琥珀酸脱氢酶、总超氧化物歧化酶的活性和丙二醛的含量,研究百合多糖对I型糖尿病大鼠的降血糖作用。结果:百合多糖可减缓糖尿病大鼠体质量的负增长;降低空腹血糖(P<0.01)和丙二醛含量(P<0.05);升高胰岛素、己糖激酶、琥珀酸脱氢酶和总超氧化物歧化酶活性(P<0.01)。结论:百合多糖一方面通过提高糖代谢酶的活性,促进葡萄糖的摄取和利用;另一方面通过提高机体抗氧化功能,抑制氧自由基对胰岛β细胞的损伤,增加胰岛素分泌,调节I型糖尿病大鼠的血糖。 Objective: To explore the hypoglycemic effect of lily polysaccharides in type I diabetic rats. Methods: Lily polysaccharide was extracted from fresh lily bulbs and purified through ion-exchange chromatography on a DEAE52 cellulose column. An alkaline-soluble fraction was obtained from the eluates from the DEAE52 cellulose column and proved to be a single component by gel filtration chromatography. The purified polysaccharide was used to treat rat models of type I diabetes induced by streptozotocin. The changes in body weight, fasting blood glucose (FI3G), insulin (INS), hexokinase (HK), succinic dehydrogenase (SDH), total superoxide dismutase (T-SOD) and malondialdehyde (MDA) were determined in diabetic rats before and after the treatment. Results: The lily polysaccharide could significantly slow down the negative growth of body weights in diabetic rats, reduce the contents of FBG (P 〈 0.01) and MDA (P 〈 0.05), and significantly increase INS, HK, SDH and T-SOD (P 〈 0.01). Conclusion: Lily polysaccharide exerts hypoglycemic effect in type I diabetic rats through enhancing the activities of antioxidant enzymes, improving antioxidant function, inhibiting oxygen free radical damage to pancreatic 13 cells and increasing insulin secretion.
出处 《食品科学》 EI CAS CSCD 北大核心 2014年第1期209-213,共5页 Food Science
基金 国家自然科学基金项目(21176063) 湖南省长沙市科技局科技计划项目(K1303022-31) 湖南省教育厅重点项目(12A085) 湖南省科技厅科技计划项目(2013SK3134)
关键词 百合多糖 I型糖尿病 胰岛素 超氧化物歧化酶 lily polysaccharide type I diabetic rats insulin (INS) superoxide dismutase (SOD)
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