Screening, domestication and identification of intestinal uric acid degrading bacteria in low uric acid population

肠道微生物作为人体最庞大的生态系统参与尿酸的合成与代谢，开发和利用肠道细菌降解尿酸或可为高尿酸血症治疗提供新思路。将低尿酸人群粪便样本处理后接种于浓度为1.5 mmol/L尿酸选择培养基进行初筛，通过浓度梯度法对初筛出的可能具有降解能力的菌株进行驯化，并通过16S rRNA序列测定方法对筛选出的具备高效尿酸降解率的菌株进行鉴定。结果表明从低尿酸人群粪便中筛选驯化出一株高效尿酸降解菌S3A，尿酸降解率可达到50.2%，经鉴定该菌为大肠杆菌。高效尿酸降解菌株的分离、驯化不仅可以为肠道微生物降解尿酸的机制研究提供科学依据，还可为今后临床高尿酸血症和痛风的治疗储备生物菌种资源。.; As the largest ecosystem of human body, intestinal microorganisms participate in the synthesis and metabolism of uric acid. Developing and utilizing intestinal bacteria to degrade uric acid might provide new ideas for the treatment of hyperuricemia. The fecal samples of people with low uric acid were inoculated into uric acid selective medium with the concentration of 1.5 mmol/L for preliminary screening, and the initially screened strains that may have degradation ability were domesticated by concentration gradient method, and the strains with high uric acid degradation rate were identified by 16S rRNA sequencing method. A strain of high-efficiency uric acid degrading bacteria was screened and domesticated from the feces of people with low uric acid. The degradation rate of uric acid could reach 50.2%. It was identified as Escherichia coli. The isolation and domestication of high efficient uric acid degrading strains can not only provide scientific basis for the study of the mechanism of intestinal microbial degradation of uric acid, but also reserve biological strains for the treatment of hyperuricemia and gout in the future.