不同体脂人群肠道主要菌群的定量分析

Quantitative analysis of dominating intestinal flora among groups of people with different body fat

目的探讨主要肠道菌群在不同体脂人群间数量变化及其对脂质代谢可能具有的影响。方法按照BMI分类标准,将研究对象分为消瘦组、正常组、超重组、肥胖组,采用选择性培养法测定研究对象新鲜粪便中5种主要肠道菌群的数量。结果随着BMI值的升高,乳酸杆菌、双歧杆菌和肠杆菌数量呈下降趋势,拟杆菌数量则显著升高(P<0.01),肠球菌和产气荚膜梭菌的数量无明显的变化趋势。结论拟杆菌对脂肪积累和肥胖形成可能具有一定的促进作用,而肠杆菌、乳酸杆菌和双歧杆菌则可能起相反的作用。

Objective To investigate the alteration of dominating intestinal floras among groups of people with different body fat and probe into the possible effect on lipid metabolism. Methods According to the BMI values, subjects were divided into 4 groups, including fleshless group, normal group, overweight group and obese group. Five dominating floras of all fresh stools were quantitated using selective culture method, and all data were analyzed statistically. Results With the increase of BMI values, there is a decreasing trend in the amount of Lactobacillus, Bifidobacterium and Enterobacillus, and the amounts of Bacteriodes obviously increased （ P 〈 0.01 ）. No obvious alternation of the amounts of Enterococcus and Clostridium was observed. Conclusion Bacteriodes may exert an boosting effect on the pile of fat and development of obese, however Enterobacillus, Lactobacillus, and Bifidobacterium have a potential opposite effect.