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An increased number of CD40-high monocytes in patients with Crohn's disease

N Sawada-Hase1, T Kiyohara, J Miyagawa

  • 1Department of Internal Medicine and Molecular Science, Graduate School of Medicine, Osaka University, Japan.

The American Journal of Gastroenterology
|July 14, 2000
PubMed

Insights

CD40 expression differs between Crohn's disease (CD) and ulcerative colitis (UC) patients. CD40-high monocytes in CD may contribute to disease pathogenesis, potentially aiding in differentiating CD from UC.

Area of Science:

  • Immunology
  • Gastroenterology

Background:

  • CD40-CD40 ligand (CD40L) interaction is crucial for T-cell immunity.
  • This interaction is implicated in the pathogenesis of inflammatory bowel diseases (IBD).

Purpose of the Study:

  • To investigate CD40 expression in peripheral blood mononuclear cells (PBMNCs) and tissue specimens.
  • To assess CD40-stimulated interleukin (IL)-12 release from PBMNCs in IBD.

Main Methods:

  • Flow cytometry and immunohistochemistry were used to examine CD40 expression.
  • Enzyme-linked immunosorbent assay (ELISA) measured IL-12 release from cultured PBMNCs.

Main Results:

  • Increased CD40 expression on B-lymphocytes in ulcerative colitis (UC) compared to Crohn's disease (CD) and controls.
  • Elevated CD40 expression and IL-12 release from monocytes in active CD patients.
  • CD40-positive, CD68-positive cells (macrophages) found in CD-affected mucosa.

Conclusions:

  • CD40 expression patterns in PBMNCs may help differentiate CD from UC.
  • CD40-high monocytes in CD patients likely play a role in disease pathogenesis.
Abstract

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