IgA-coated E. Coli enriched in Crohn's disease spondyloarthritis promote TH17-dependent inflammation

Monica Viladomiu, Charles Kivolowitz, Ahmed Abdulhamid, Belgin Dogan, Daniel Victorio, Jim G. Castellanos, Viola Woo, Fei Teng, Nhan L. Tran, Andrew Sczesnak, Christina Chai, Myunghoo Kim, Gretchen E. Diehl, Nadim J. Ajami, Joseph F. Petrosino, Xi K. Zhou, Sergio Schwartzman, Lisa A. Mandl, Meira Abramowitz, Vinita JacobBrian Bosworth, Adam Steinlauf, Ellen J. Scherl, Hsin Jung Joyce Wu, Kenneth W. Simpson, Randy S. Longman

Research output: Contribution to journalArticlepeer-review

169 Scopus citations


Peripheral spondyloarthritis (SpA) is a common extraintestinal manifestation in patients with active inflammatory bowel disease (IBD) characterized by inflammatory enthesitis, dactylitis, or synovitis of nonaxial joints. However, a mechanistic understanding of the link between intestinal inflammation and SpA has yet to emerge. We evaluated and functionally characterized the fecal microbiome of IBD patients with or without peripheral SpA. Coupling the sorting of immunoglobulin A (IgA)-coated microbiota with 16S ribosomal RNA-based analysis (IgA-seq) revealed a selective enrichment in IgA-coated Escherichia coli in patients with Crohn's disease-Associated SpA (CD-SpA) compared to CD alone. E. coli isolates from CD-SpA-derived IgA-coated bacteria were similar in genotype and phenotype to an adherent-invasive E. coli (AIEC) pathotype. In comparison to non-AIEC E. coli, colonization of germ-free mice with CD-SpA E. coli isolates induced T helper 17 cell (TH17) mucosal immunity, which required the virulence-Associated metabolic enzyme propanediol dehydratase (pduC). Modeling the increase in mucosal and systemic TH17 immunity we observed in CD-SpA patients, colonization of interleukin-10-deficient or K/BxN mice with CD-SpA-derived E. coli lead to more severe colitis or inflammatory arthritis, respectively. Collectively, these data reveal the power of IgA-seq to identify immunoreactive resident pathosymbionts that link mucosal and systemic TH17-dependent inflammation and offer microbial and immunophenotype stratification of CD-SpA that may guide medical and biologic therapy.

Original languageEnglish (US)
Article numbereaaf9655
JournalScience translational medicine
Issue number376
StatePublished - Feb 8 2017

ASJC Scopus subject areas

  • Medicine(all)


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