基于16S rDNA测序技术的膝骨关节炎湿热痹阻证、寒湿痹阻证患者肠道菌群差异性研究

Differential Study on Intestinal Flora between Knee Osteoarthritis with Dampness-heat Obstruction Syndrome and Cold-dampness Blockage Syndrome Based on 16S rDNA Sequencing Technology

目的比较膝骨关节炎(KOA)湿热痹阻证、寒湿痹阻证患者与健康人群肠道菌群构成及多样性特征的差异,探讨2种中医证型KOA患者的肠道菌群特征。方法根据纳入及排除标准,选取湿热痹阻证组、寒湿痹阻证组、健康对照组各10例,收集粪便标本,利用16S rDNA测序技术,通过Alpha及Beta多样性分析等方法,对比组间肠道菌群差异。结果3组肠道菌群的物种丰富度无明显差异,但寒湿痹阻证组与湿热痹阻证组、健康对照组之间物种多样性差异有统计学意义(P<0.05)。3组肠道菌群构成差异有统计学意义(P=0.001)。门水平上拟杆菌门和厚壁菌门占明显优势,属水平上湿热痹阻证组和寒湿痹阻证组普雷沃氏菌属丰度增加。湿热痹阻证组肠杆菌科、毛螺菌属、克雷伯氏菌属等丰度较大,寒湿痹阻证组普雷沃氏菌属、假单胞菌属等丰度较大。结论KOA湿热痹阻证与寒湿痹阻证患者肠道菌群结构存在一定差异。

Objective To compare the differences in the composition and diversity of intestinal flora between knee osteoarthritis(KOA)patients with dampness-heat obstruction syndrome,cold-dampness blockage syndrome and healthy people;To explore the characteristics of intestinal flora of KOA patients with the above two TCM syndrome types.Methods According to the inclusion and exclusion criteria,dampness-heat obstruction syndrome group,colddampness blockage syndrome group,and healthy control group were screened,with 10 cases for each group,and then their fecal samples were collected.16S rDNA sequencing technology was used to compare the differences of intestinal flora among groups by Alpha and Beta diversity analysis.Results There was no significant difference in species richness of intestinal flora among the three groups,but there was statistical significance in species diversity between cold-dampness blockage syndrome group and dampness-heat obstruction syndrome group,and healthy control group(P<0.05).There were statistical significance among the three groups in intestinal flora composition(P=0.001).At the phylum level,Bacteroidota and Firmicutes were significantly dominant,and at genus level,the abundance of Prevotella in dampness-heat obstruction syndrome group and cold-dampness blockage syndrome group increased.The abundance of Enterobacteriaceae,Lachnospira and Klebsiella was relatively large in dampness-heat obstruction syndrome group.The abundance of Prevotella and Pseudomonas in cold-dampness blockage syndrome group was large.Conclusion There are differences in the intestinal flora structure between KOA patients with dampness-heat obstruction syndrome and cold-dampness blockage syndrome.