PMID- 33973546 OWN - NLM STAT- MEDLINE DCOM- 20211015 LR - 20230829 IS - 1531-6963 (Electronic) IS - 1040-8711 (Linking) VI - 33 IP - 4 DP - 2021 Jul 1 TI - Intestinal dysbiosis in spondyloarthritis - chicken or egg? PG - 341-347 LID - 10.1097/BOR.0000000000000800 [doi] AB - PURPOSE OF REVIEW: The well-established link between intestinal inflammation and spondyloarthritis (SpA) remains largely unexplained. Recent sequencing technologies have given access to a thorough characterization of the gut microbiota in healthy and disease conditions. This showed that inflammatory bowel disease (IBD) is associated with dysbiosis - i.e., disturbed gut microbiota composition - which may contribute to disease pathogenesis. Whether gut dysbiosis exists in SpA and could contribute to disease development or be a bystander consequence of chronic inflammation is a question of major interest. RECENT FINDINGS: Several metagenomic studies have been performed in SpA. Most of them concerned faecal samples and showed dysbiosis consisting in a reduction of microbial biodiversity in a way similar to what has been described in IBD. They also highlighted changes in microbial taxa composition that could contribute to the inflammatory process. Likewise, healthy carriers of human leukocyte antigen (HLA)-B27 exhibited gut dysbiosis, indicating that this predisposing allele could exert its pathogenic effect by influencing microbiota composition, and possibly by driving antigen-specific cross-reactive immune response. On the other hand, SpA treatments were associated with a reduction of dysbiosis, showing that it is at least in part a consequence of inflammation. SUMMARY: Recent insights from metagenomic studies warrant further investigations to identify the mechanisms by which microbial dysbiosis could contribute to SpA development. This would bring novel therapeutic opportunities aiming at correcting detrimental changes. CI - Copyright (c) 2021 Wolters Kluwer Health, Inc. All rights reserved. FAU - Breban, Maxime AU - Breban M AD - Infection & Inflammation, UMR 1173, Inserm, UVSQ/Universite Paris Saclay, Montigny-le-Bretonneux. AD - Service de Rhumatologie, Hopital Ambroise Pare, AP-HP, Boulogne. AD - Laboratoire d'Excellence Inflamex, Universite Paris Descartes, Sorbonne Paris Cite, Paris, France. FAU - Beaufrere, Marie AU - Beaufrere M AD - Infection & Inflammation, UMR 1173, Inserm, UVSQ/Universite Paris Saclay, Montigny-le-Bretonneux. AD - Service de Rhumatologie, Hopital Ambroise Pare, AP-HP, Boulogne. AD - Laboratoire d'Excellence Inflamex, Universite Paris Descartes, Sorbonne Paris Cite, Paris, France. FAU - Glatigny, Simon AU - Glatigny S AD - Infection & Inflammation, UMR 1173, Inserm, UVSQ/Universite Paris Saclay, Montigny-le-Bretonneux. AD - Laboratoire d'Excellence Inflamex, Universite Paris Descartes, Sorbonne Paris Cite, Paris, France. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Curr Opin Rheumatol JT - Current opinion in rheumatology JID - 9000851 RN - 0 (HLA-B27 Antigen) SB - IM MH - Dysbiosis MH - *Gastrointestinal Microbiome MH - HLA-B27 Antigen MH - Humans MH - *Inflammatory Bowel Diseases MH - *Spondylarthritis EDAT- 2021/05/12 06:00 MHDA- 2021/10/16 06:00 CRDT- 2021/05/11 09:27 PHST- 2021/05/12 06:00 [pubmed] PHST- 2021/10/16 06:00 [medline] PHST- 2021/05/11 09:27 [entrez] AID - 00002281-202107000-00007 [pii] AID - 10.1097/BOR.0000000000000800 [doi] PST - ppublish SO - Curr Opin Rheumatol. 2021 Jul 1;33(4):341-347. doi: 10.1097/BOR.0000000000000800.