食品科学 ›› 2022, Vol. 43 ›› Issue (10): 199-206.doi: 10.7506/spkx1002-6630-20210425-356

• 生物工程 • 上一篇    下一篇

降解核苷作用乳酸菌的筛选及其潜在降尿酸功能

王家彬,潘力   

  1. (华南理工大学生物科学与工程学院,广东省发酵与酶工程重点实验室,广东 广州 510006)
  • 出版日期:2022-05-25 发布日期:2022-05-27
  • 基金资助:
    广东省重点领域研发计划项目(2018B02020205002);佛山市核心技术项目(1920001000824); 天津科技计划项目(TSBICIP-KJGG-006-21);广州科技规划项目(2020002030207)

Screening and Uric Acid-lowering Potential of Nucleoside-degrading Lactic Acid Bacteria

WANG Jiabin, PAN Li   

  1. (Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China)
  • Online:2022-05-25 Published:2022-05-27

摘要: 为得到具有较高降血尿酸活性的特殊乳酸菌,首先基于高效液相色谱法筛选出具有降解肌苷和鸟苷等核苷类物质的乳酸菌,其中菌株LB1lac20具有最高的肌苷降解率(91.19%)和鸟苷降解率(89.67%)。基于16S rDNA序列进行BLAST比对,菌株LB1lac20被鉴定为短乳杆菌(Lactobacillus brevis)。为进一步分析菌株LB1lac20的潜在降尿酸作用,采用尿酸生成法建立体外模型,分析菌株LB1lac20对黄嘌呤氧化酶的抑制作用效果。结果表明菌株LB1lac20活菌悬液和胞内提取物最终对黄嘌呤氧化酶的抑制率分别达到了21.27%和19.60%(P<0.05)。综上,本研究成功筛选出1 株具有高效核苷降解能力的短乳杆菌LB1lac20,并对黄嘌呤氧化酶具有明显的抑制作用,可以在不同方面发挥其潜在的降尿酸能力。本研究筛选获得的菌株可以作为一种潜在的降尿酸天然来源,为开发预防和治疗高尿酸血症药物提供理论基础和菌种资源。

关键词: 高尿酸血症;降尿酸;乳酸菌;短乳杆菌;黄嘌呤氧化酶

Abstract: In order to obtain special lactic acid bacteria with potent uric acid-lowering activity, this study screened lactic acid bacterial strains for their ability to degrade inosine and guanosine by high performance liquid chromatography (HPLC). The strain LB1lac20 was found to give the highest degradation rate of inosine (91.19%) and guanosine (89.67%). By sequence?alignment of 16S rRNA gene using the Basic Local Alignment Search Tool (BLAST), LB1lac20 was identified as Lactobacillus brevis. To evaluate its uric acid-lowering potential, an in vitro model was established by the uric acid production method and used to analyze the inhibitory effect of LB1lac20 on xanthine oxidase. The results showed that the activity of xanthine oxidase was 21.27% and 19.60% inhibited by the live suspension and intracellular extract of LB1lac20, respectively (P < 0.05). To sum up, L. brevis LB1lac20 may set the stage for the development of drugs for the prevention and treatment of hyperuricemia.

Key words: hyperuricemia; antiuric acid; probiotics; Lactobacillus brevis; xanthine oxidase

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