Microbiome & Chronic Diseases

Evidence Based Medicine

Sjögren syndrome {40000122}

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Sjögren syndrome
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Shared Notes

  • [1.7
    - The pSS patients had less beneficial or commensal butyrate-producing bacteria and a higher proportion of opportunistic pathogens with proinflammatory activity, which may impair intestinal barrier function and therefore contribute to inflammatory processes associated with pSS by increasing the production of proinflammatory cytokines and decreasing the release of the anti-inflammatory cytokine IL-10 and the peripheral FOXP3 mRNA expression, implicated in the development and function of regulatory T cells (Treg) cells.
    -pSS patients had gut dysbiosis associated with increased serum levels of proinflammatory cytokines including IL-6, IL-12, IL-17 and TNF-alpha (systemic inflammation) and zonulin (intestinal permeability) that resulted in increased systemic microbial exposure.
    -At the genera level, gut dysbiosis showed an increase in the abundance of the mucin-degrading and enteric pathogens Prevotella, Clostridium, Enterobacter, Escherichia, and Streptococcus and a depletion in the relative abundance of Bacteroides, Parabacteroides, Faecalibacterium, Roseburia, Ruminococcus, Dorea, Alistipes, Blautia and Bifidobacterium.
    - Prevotella contains enzymes that are important in mucin degradation, which may disrupt the colonic mucus barrier and increase intestinal permeability allowing the diffusion of pathogens, toxins, and antigens from the luminal environment into the mucosal tissues and circulatory system, resulting in the immune activation and tissue inflammation important in the onset or progression of several intestinal and chronic autoimmune diseases

Common References