College of Basic Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China.
School of Public Health, Zhejiang Chinese Medical University, Hangzhou, China.
Front Immunol. 2022 Feb 7;13:804306. doi: 10.3389/fimmu.2022.804306. eCollection 2022.
Although gut dysbiosis had been demonstrated to be an important factor affecting hyperuricemia (HUA) and gout, little is known for its potential mechanistic connections. In this study, -KO mice model that with spontaneously developed pronounced HUA and urate nephropathy was used to explore the pathophysiologic mechanism of microbiota alterations in HUA and gout with integrated multi-omics analysis. 16S rRNA gene sequencing was performed to characterize the characteristic bacteria, and untargeted LC/MS analysis was applied to reveal the featured metabolites. Our results showed there was a significant shift in gut microbiota composition and function in -KO mice compared to WT mice and apparent metabolomics differences between the two groups. Among them, amino acids metabolism appears to play a critical role. Correlation analysis further revealed that the characteristic metabolites were strongly influenced by the discrepant bacterial genera. Furthermore, impairment of intestinal integrity and profound alterations in the profile of solute carrier family resulted in dysregulation of amino acids transportation, which subsequently impacted serum uric acid level and CD4 Th17 driven inflammation. Together, these data indicate that gut dysbiosis promotes purine metabolism disorder and inflammation in -KO mice. Remodeling the gut microbiota is a promising strategy to combat HUA and gout.
虽然肠道菌群失调已被证明是影响高尿酸血症(HUA)和痛风的一个重要因素,但对于其潜在的机制联系知之甚少。在这项研究中,使用自发产生明显 HUA 和尿酸肾病的 -KO 小鼠模型,通过整合多组学分析来探讨 HUA 和痛风中微生物组改变的病理生理机制。进行 16S rRNA 基因测序以描述特征细菌,并应用非靶向 LC/MS 分析来揭示特征代谢物。我们的结果表明,与 WT 小鼠相比,-KO 小鼠的肠道微生物群落组成和功能发生了显著变化,两组之间存在明显的代谢组学差异。其中,氨基酸代谢似乎起着关键作用。相关性分析进一步表明,特征代谢物受不同细菌属的强烈影响。此外,肠道完整性受损和溶质载体家族特征的深刻改变导致氨基酸转运失调,进而影响血清尿酸水平和 CD4 Th17 驱动的炎症。总之,这些数据表明肠道菌群失调促进了 -KO 小鼠嘌呤代谢紊乱和炎症。重塑肠道微生物群是防治 HUA 和痛风的一种有前途的策略。
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