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- W4313562260 abstract "Objective Gut microbiota dysbiosis is closely linked to the pathogenesis of rheumatoid arthritis (RA). We aimed to identify potential probiotic gut microbes that can ameliorate the development of RA. Design Microbiota profiling in patients with RA and healthy individuals was investigated via 16S rDNA bacterial gene sequencing and shotgun metagenomics. Collagen-induced arthritic mice and TNF-α transgenic mice were used to evaluate the roles of the gut commensal Parabacteroides distasonis in RA. The effects of P. distasonis -derived microbial metabolites on the differentiation of CD4 + T cells and macrophage polarisation were also investigated. Results The relative abundance of P. distasonis in new-onset patients with RA and patients with RA with history of the disease was downregulated and this decrease was negatively correlated with Disease Activity Score-28 (DAS28). Oral treatment of arthritic mice with live P. distasonis (LPD) considerably ameliorated RA pathogenesis. LPD-derived lithocholic acid (LCA), deoxycholic acid (DCA), isolithocholic acid (isoLCA) and 3-oxolithocholic acid (3-oxoLCA) had similar and synergistic effects on the treatment of RA. In addition to directly inhibiting the differentiation of Th17 cells, 3-oxoLCA and isoLCA were identified as TGR5 agonists that promoted the M2 polarisation of macrophages. A specific synthetic inhibitor of bile salt hydrolase attenuated the antiarthritic effects of LPD by reducing the production of these four bile acids. The natural product ginsenoside Rg2 exhibited its anti-RA effects by promoting the growth of P. distasonis . Conclusions P. distasonis and ginsenoside Rg2 might represent probiotic and prebiotic agents in the treatment of RA." @default.
- W4313562260 created "2023-01-06" @default.
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- W4313562260 date "2023-01-05" @default.
- W4313562260 modified "2023-10-01" @default.
- W4313562260 title "Gut commensal<i>Parabacteroides distasonis</i>alleviates inflammatory arthritis" @default.
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- W4313562260 doi "https://doi.org/10.1136/gutjnl-2022-327756" @default.
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