Impaired peripheral Th1 CD4+ T cell response to Escherichia coli proteins in patients with Crohn's disease and ankylosing spondylitis.

Abstract

BACKGROUND:

To clarify the impact of T cell responses towards enteric antigens for chronic intestinal inflammation, we determined T helper 1 reactivity towards conserved Escherichia coli proteins in patients with Crohn's disease (CD) and healthy individuals and patients with ankylosing spondylitis (AS), who also often show microscopic inflammatory lesions within the gut or even develop overt inflammatory bowel disease.

METHODS:

We determined the frequency of IFNγ+CD40L+ cells/CD4+ T cells after stimulation of whole blood with pools of E. coli proteins.

RESULTS:

The E. coli-specific Th1 response was significantly reduced in CD patients and to a lower extent also in AS patients.

CONCLUSIONS:

E. coli is a target for polyclonal Th1 responses in healthy individuals. The impairment of these responses in CD and AS patients might be due to recruitment of enterobacteria-specific Th1 cells to the gut or might reflect inadequate priming of adaptive immune response.

• Authors: Asgar Ergin, Uta Syrbe, Rebecca Scheer, Andreas Thiel, Thomas Adam, Konrad Büssow, Rainer Duchmann, Martin Zeitz, Joachim Sieper
• Journal: Journal of clinical immunology (J Clin Immunol) Vol. 31 Issue 6 Pg. 998-1009 (Dec 2011) ISSN: 1573-2592 [Electronic] Netherlands
• PMID: 21901394 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Escherichia coli Proteins
• CD40 Ligand
• Interferon-gamma

Topics

• Adaptive Immunity
• Adolescent
• Adult
• CD4-Positive T-Lymphocytes (immunology, metabolism, pathology)
• CD40 Ligand (metabolism)
• Cell Movement
• Child
• Child, Preschool
• Crohn Disease (immunology, physiopathology)
• Escherichia coli Proteins (immunology)
• Female
• Humans
• Immunosuppression Therapy
• Infant
• Inflammation
• Interferon-gamma (metabolism)
• Intestines (pathology)
• Male
• Spondylitis, Ankylosing (immunology, physiopathology)
• Th1 Cells (immunology, metabolism, pathology)