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A possible link between Crohn's disease and ankylosing spondylitis via Klebsiella infections

Alan Ebringer1, Taha Rashid, Harmale Tiwana

  • 1School of Biomedical and Health Sciences, King's College London, 150 Stamford Street, London, SE1 9NN, UK. alan.ebringer@kcl.ac.uk

Clinical Rheumatology
|August 31, 2006
PubMed

Insights

Klebsiella bacteria may trigger Crohn's disease (CD) through molecular mimicry, evidenced by cross-reactivity between anti-Klebsiella and anti-collagen antibodies in patients. Early anti-Klebsiella treatments are proposed for Crohn's disease management.

Area of Science:

  • Gastroenterology
  • Immunology
  • Microbiology

Background:

  • Crohn's disease (CD) is an immune-mediated gastrointestinal disorder.
  • Genetic and environmental factors contribute to CD pathogenesis.
  • Klebsiella microbes are implicated in CD initiation and progression via molecular mimicry.

Purpose of the Study:

  • To investigate the role of Klebsiella microbes in Crohn's disease.
  • To explore the mechanism of molecular mimicry between Klebsiella and host components.
  • To evaluate potential early therapeutic strategies for CD.

Main Methods:

  • Detection of antibodies against Klebsiella and collagen types I, III, IV, and V in CD and ankylosing spondylitis (AS) patients.
  • Analysis of molecular similarities between Klebsiella antigens and human genetic markers (HLA-B27) and collagen.
  • Assessment of cross-reactivity between anti-Klebsiella and anti-collagen antibodies.

Main Results:

  • Elevated levels of anti-Klebsiella and anti-collagen antibodies were found in CD and AS patients.
  • Molecular mimicry was identified between Klebsiella nitrogenase/pullulanase and HLA-B27/collagen.
  • Significant positive correlations and cross-reactivity were observed between these antibodies.

Conclusions:

  • Klebsiella microbes may play a crucial role in Crohn's disease pathogenesis through molecular mimicry.
  • Early therapeutic interventions targeting Klebsiella, such as antibiotics and dietary changes, are proposed for CD.
  • Combined treatment strategies including anti-Klebsiella measures and conventional therapies may benefit CD patients.

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