3种不溶性复合膳食纤维对小鼠肠道内短链脂肪酸产生的影响

不同膳食纤维均可被肠道微生物发酵利用产生短链脂肪酸(SCFA),SCFA对人体的健康有重要作用。以果胶、抗性淀粉、低聚果糖以及纤维素4种不溶性膳食纤维中的任意3种,按照一定比例复合并添加于小鼠饲料中。经6周喂养后解剖收集小鼠肠道内容物并用气相色谱测定SCFA的种类及含量,以确定产生SCFA不同膳食纤维的最优组合。结果显示:对于雌性小鼠,果胶、抗性淀粉、纤维素3种膳食纤维各以2%比例复合的饲料效果最好;对于雄性小鼠,效果最好的是果胶、低聚果糖、纤维素3种膳食纤维各以2%比例复合的饲料。

Effects of Insoluble Compound Dietary Fibers on Short-Chain Fatty Acid Production in the Intestinal Tract of Rats

Short-chain fatty acids(SCFAs) can be generated from a variety of dietary fibers through in vivo fermentation by intestinal microflora and are beneficial to human health.Three types of insoluble dietary fibers were selected from pectin,resistant starch,fructo-oligosaccharide and cellulose,mixed in a certain proportion and added to the rat diet.After six weeks of feeding,the rats were anatomized to collect intestinal contents,and the types and amounts of SCFAs in the intestinal contents were measured by GC to determine the optimal combination of SCFA types.The optimal combination of insoluble dietary fibers in the diet of female rats was pectin,resistant starch and cellulose with an amount of 2% for each of them.For male rats,the optimal combination was pectin,fructo-oligosaccharide and cellulose,each of which was added at 2%.