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Article Dans Une Revue Annals of the Rheumatic Diseases Année : 2017

Faecal microbiota study reveals specific dysbiosis in spondyloarthritis

Maxime Breban
Julien Tap
  • Fonction : Auteur
Ariane Leboime
  • Fonction : Auteur
Roula Said-Nahal
  • Fonction : Auteur
Philippe Langella
  • Fonction : Auteur
Gilles Chiocchia
  • Fonction : Auteur
Jean-Pierre Furet
  • Fonction : Auteur
Harry Sokol

Résumé

Objective Altered microbiota composition or dysbiosis is suspected to be implicated in the pathogenesis of chronic inflammatory diseases, such as spondyloarthritis (SpA) and rheumatoid arthritis (RA). Methods 16S ribosomal RNA gene sequencing was performed on faecal DNA isolated from stool samples in two consecutive cross-sectional cohorts, each comprising three groups of adult volunteers: SpA, RA and healthy controls (HCs). In the second study, HCs comprised a majority of aged-matched siblings of patients with known HLA-B27 status. Alpha and beta diversities were assessed using QIIME, and comparisons were performed using linear discriminant analysis effect size to examine differences between groups. Results In both cohorts, dysbiosis was evidenced in SpA and RA, as compared with HCs, and was disease specific. A restriction of microbiota biodiversity was detected in both disease groups. The most striking change was a twofold to threefold increased abundance of Ruminococcus gnavus in SpA, as compared with both RA and HCs that was significant in both studies and positively correlated with disease activity in patients having a history of inflammatory bowel disease (IBD). Among HCs, significant difference in microbiota composition were also detected between HLA-B27+ and HLA-B27 negative siblings, suggesting that genetic background may influence gut microbiota composition. Conclusion Our results suggest that distinctive dysbiosis characterise both SpA and RA and evidence a reproducible increase in R. gnavus that appears specific for SpA and a marker of disease activity. This observation is consistent with the known proinflammatory role of this bacteria and its association with IBD. It may provide an explanation for the link that exists between SpA and IBD.
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hal-03998743 , version 1 (21-02-2023)

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Maxime Breban, Julien Tap, Ariane Leboime, Roula Said-Nahal, Philippe Langella, et al.. Faecal microbiota study reveals specific dysbiosis in spondyloarthritis. Annals of the Rheumatic Diseases, 2017, 76 (9), pp.1614-1622. ⟨10.1136/annrheumdis-2016-211064⟩. ⟨hal-03998743⟩
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