title: Number of activated T-helper cells and NK cells in peripheral blood is decreased in severe Crohn's disease.
abstract: Monoclonal antibodies and flow cytometry were used to analyse the proportions of T-cell subsets and NK cells in blood of patients (n = 45) with Crohn's disease. In patients with severe activity disease decreased numbers of activated (CD25+CD4+) T-helper cells and NK (CD16+CD56+) cells were found, while in patients with low activity disease the numbers of activated T-helper cells were increased and the numbers of NK cells were similar to those in normal controls. Thus, 8% of T cells were CD25+CD4+ and 16% of mononuclear cells were CD16+CD56+ in patients with severe disease. In patients with quiescent disease, 11% of T cells were CD25+CD4+ and 26% of mononuclear cells were CD16+CD56+. The results suggest that disease activity may be reflected in the proportions of blood circulating mononuclear cells, perhaps because of accumulation of CD25+CD4+ T-helper cells and NK cells in the affected tissue during exacerbation of the disease.
authors.affiliation: Department of Pathology, University of Helsinki, Finland.
authors.forename: S
authors.initials: S
authors.lastname: Kontiainen
authors.forename: T
authors.initials: T
authors.lastname: Scheinin
authors.forename: L
authors.initials: L
authors.lastname: Halme
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D015704:CD4 Antigens; D018791:CD4 Lymphocyte Count; D003424:Crohn Disease / Q000276:immunology*; D005260:Female; D006801:Humans; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000276:immunology*; D008213:Lymphocyte Activation; D018655:Lymphocyte Count; D008297:Male; D008875:Middle Aged; D015375:Receptors, Interleukin-2; D006377:T-Lymphocytes, Helper-Inducer / Q000145:classification / Q000276:immunology*
chemical_list: D015704:CD4 Antigens; D015375:Receptors, Interleukin-2