Vasculitis & polymyalgia rheumatica

Microbiome and Behçet's disease: a systematic review

Clin Exp RheumatolPublished Systematic review

Authors' conclusion

The microbiome may thus be involved in BD through immunity regulation and epigenetic modifications.

Study context

Population
Patients with Behçet's disease (BD); studies of the microbiota and the microbiome–immunity relationship in BD16 articles
Outcome
Changes in the microbiota of patients with BD and mechanisms linking the microbiome and immunity in BD
Methodological detailsqualitative synthesis, Search of PubMed and the Cochrane Library: "microbiota AND Behçet's disease" or "microbiome AND Behçet's disease"
  • Qualitative synthesis
  • Search of PubMed and the Cochrane Library: "microbiota AND Behçet's disease" or "microbiome AND Behçet's disease"

Pooled result

As reported in the abstract

Microbiota changes in BD
  • Gut dysbiosis present in BD patients
  • Decrease in butyrate-producing bacteria, which could affect T cell differentiation and epigenetic regulation of immune-related genes
  • Modification of tryptophan-metabolising bacteria, possibly linked to dysregulated IL-22 secretion
  • Decrease in bacteria known to have anti-inflammatory properties
  • Oral microbiota: possible role of Streptococcus sanguinis through molecular mimicry and NETosis

Further pooled results

Clinical studies of BD

Need for dentistry associated with a more severe course in BD
Antibiotic-supplemented mouthwash reduces pain and ulcers

Animal models

Fecal transplantation of BD patients' microbiota into mice led to decreased SCFA production, neutrophil activation, and Th1/Th17 responses
Recipient mice showed exacerbated experimental autoimmune uveitis (EAU) and experimental autoimmune encephalomyelitis (EAE)
In HSV-1 infected mice mimicking BD, butyrate-producing bacteria improved symptoms and immune variables

Original publication

Microbiome and Behçet's disease: a systematic review. Clin Exp Rheumatol. Published 16 September 2022. doi:10.55563/clinexprheumatol/zbt4gx

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