几种不同来源β-葡聚糖的体外功能特性

The study on functional property in vitro of β-glucan from different sources

以青稞β-葡聚糖粗提物、燕麦β-葡聚糖粗提物、酵母β-葡聚糖粗提物这3种天然提取物为研究对象,以化学合成的聚葡萄糖为对照,进行了吸附油脂、胆固醇、胆盐、葡萄糖,抑制胰脂肪酶活性、胰淀粉酶活性及阳离子交换7种体外功能性实验。结果显示:每克青稞β-葡聚糖粗提物可以吸附6.28 g玉米油、20.49 mg胆固醇、18.91 mmol葡萄糖,其对胰脂肪酶活性的抑制能力为28.1%、对胰淀粉酶活性的抑制能力达92.9%,这几项数值均优于其他3个样品,说明青稞β-葡聚糖粗提物在降血脂、调节血糖方面具有综合优势;燕麦β-葡聚糖粗提物和酵母β-葡聚糖粗提物的胆盐吸附量基本相当,明显高于青稞β-葡聚糖粗提物;酵母β-葡聚糖粗提物的阳离子交换能力居4个样品之首;聚葡萄糖也具有以上7种体外功能特性,但未发现突出优势。

Three natural crude extracts of β-glucan from hulless barley,oat and yeast were used as the study objects and the synthetic polydextrose was used as the control. We conduct seven experiments on functional property in vitro,including the adsorption of oil cholesterol cholate and glucose,the inhibition of pancrelipase and amylopsin,and the cation exchange. The result shows,one gram of crude extract of β-glucan from hulless barley can adsorb6. 28g corn oil,20. 49mg cholesterol,18. 91mmol glucose,and the capacity of inhibiting pancrelipase and amylopsin is 28. 1% and 92. 9%,respectively. The extracts from hulless barley has comprehensive advantages on lowering blood pressure and adjusting blood glucose and is the best among four samples. The crude extracts of β-glucan from oat and yeast have roughly the equal adsorption of cholate,and their adsorption capacity is significantly higher than the crude extract of β-glucan from hulless barley. The cation exchange capacity of crude extract of β-glucan from yeast is the highest of four samples. The polydextrose also has the seven functional properties in vitro,but it doesn＇t show any competitive advantages.