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Bacterial and fungal microbiota in relation to probiotic therapy (VSL#3) in pouchitis

T Kühbacher1, S J Ott, U Helwig

  • 1Department of General Internal Medicine, Kiel, Germany.

Gut
|January 13, 2006
PubMed
Abstract

Insights

Probiotic therapy with VSL#3 enhances beneficial bacteria and reduces fungi in patients with ulcerative colitis, aiding remission. This study clarifies how probiotics restore a healthy gut microbiota, crucial for inflammatory bowel diseases.

Area of Science:

  • Gastroenterology and Microbiology
  • Inflammatory Bowel Disease Research
  • Gut Microbiome Analysis

Background:

  • Pouchitis is a significant complication following ileal pouch anal anastomosis for ulcerative colitis.
  • The intestinal microbiota's role in pouchitis pathophysiology is critical.
  • Probiotics have shown efficacy in maintaining remission for pouchitis, but their mechanism is unclear.

Purpose of the Study:

  • To investigate the impact of VSL#3 probiotic therapy on the bacterial and fungal microbiota in pouchitis patients.
  • To explore the mechanisms underlying probiotic efficacy in maintaining remission for pouchitis.

Main Methods:

  • Analysis of mucosa-associated microbiota from endoscopic pouch biopsies before and after VSL#3 treatment.
  • Utilized ribosomal DNA/RNA-based community fingerprinting, clone libraries, real-time PCR, and fluorescence in situ hybridization.
  • Patients were part of a placebo-controlled trial for VSL#3 remission maintenance.

Main Results:

  • Patients with pouchitis on placebo exhibited low bacterial and high fungal diversity.
  • VSL#3 treatment significantly increased bacterial diversity and decreased fungal diversity (p = 0.001).
  • Real-time PCR confirmed VSL#3 increased total bacterial cells (p = 0.002) and promoted anaerobic species, altering Lactobacilli and Bifidobacteria populations.

Conclusions:

  • Probiotic VSL#3 therapy enriches intestinal bacteria, particularly anaerobic species, and reduces fungal diversity.
  • This restoration of a protective microbiota may be the mechanism by which probiotics benefit inflammatory diseases of the lower gastrointestinal tract.
  • Findings suggest a potential therapeutic strategy for inflammatory barrier diseases via microbiota modulation.

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