ARD:微生物菌群失调和代谢紊乱在类风湿性关节炎中的阶段特异性作用

2022-08-27 MedSci原创 MedSci原创

旨在研究RA中微生物失调和代谢紊乱的阶段特异性作用:均匀拟杆菌和拟杆菌的消耗削弱了糖胺聚糖代谢;大肠杆菌的升高增强了II期和III期的精氨酸琥珀酰转移酶途径;高水平的甲氧基乙酸和半胱氨酸-S-硫酸盐。

目的类风湿关节炎(RA)是一种进行性疾病,包括四个阶段,其中肠道微生物组与发病机制相关。来自山东第一医科大学、山东大学和华中科技大学的团队旨在研究RA中微生物失调和代谢紊乱的阶段特异性作用。

方法研究人员调查了根据基于2010RA分类标准分为四个阶段(I-IV 期)的76RA患者、19名骨关节炎患者和27名健康人的粪便宏基因组和血浆代谢组。为了验证关节滑液的细菌侵袭,对来自四个RA阶段的271名患者的另一个验证队列进行了16S rRNA 基因测序、细菌分离和扫描电子显微镜检查。

结果首先,均匀拟杆菌和拟杆菌的消耗削弱了糖胺聚糖代谢(p<0.001),在四个阶段持续伤害关节软骨。其次,大肠杆菌的升高增强了II期和III期的精氨酸琥珀酰转移酶途径(p<0.001),这与类风湿因子的增加有关(p=1.35×10-3)并可能导致骨丢失。第三,异常高水平的甲氧基乙酸(p=1.28×10-8)和半胱氨酸-S-硫酸盐(p=4.66×10-12)分别在II 期抑制成骨细胞,在III期增强破骨细胞,促进骨侵蚀。第四,肠道通透性的持续增加可能会诱导IV期关节滑液的肠道微生物侵入。

结论临床微生物干预应考虑RA阶段,其中微生物菌群失调和代谢紊乱呈现不同的模式并发挥特定阶段的作用。该研究工作为从分期的角度理解肠关节轴提供了新的见解,为 RA的预后和治疗开辟了新的途径。

 

出处:Cheng M, Zhao Y, Cui Y, et al. Stage-specific roles of microbial dysbiosis and metabolic disorders in rheumatoid arthritis. Annals of the Rheumatic Diseases Published Online First: 19 August 2022. doi: 10.1136/ard-2022-222871

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    2022-08-27 lmm397
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类风湿性关节炎(RA)是一种系统性的自身免疫疾病,以慢性滑膜关节炎症为特征。当宿主的致病性清除机制紊乱时,牙龈卟啉单胞菌(P. gingivalis)感染可在人类中引起危及生命的炎症免疫反应。

A&R:遗传学在临床可疑关节痛和类风湿关节炎发展中的作用,一项大型横断面研究

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