Abstract:
:The role of the type-2 T helper (Th2) cell-mediated immune response in the immunopathogenesis of atopic dermatitis (AD) is well documented. Whether polarized immunoresponse is confined to antigen-specific T cells or is distributed among all T cell subsets is still controversial. We investigated frequencies of interleukin-2 (IL-2), IL-4, interferon-gamma (IFN-gamma), and tumor necrosis factor-alpha (TNF-alpha) producing CD3(+) and CD4(+) T cells in peripheral blood from children with atopic dermatitis and healthy subjects with and without in vitro stimulation. Children with severe AD had a significantly lower percentage of CD4(+) T cells spontaneously expressing IL-4 compared with healthy controls (p <0.01). Polyclonal stimulation significantly increased cytokine production in both AD patients and healthy individuals. Frequencies of CD3(+) and CD4(+) producing IL-2, IL-4, IFN-gamma, and TNF-alpha after in vitro stimulation with phorbol-12-myristate 13-acetate (PMA) + ionomycin were comparable in the AD and control groups. In response to PMA/ionomycin, children with AD and asthma symptoms had a significantly lower percentage of CD3(+) T cells producing TNF-alpha. We failed to demonstrate evidence of an imbalance with respect to type-2 cytokine productions in children with AD. Comparable induction of Th1 and Th2 cytokines in polyclonally stimulated peripheral CD3(+) and CD4(+)T cells from AD patients and controls puts into question the polarized Th2 immune response as a general characteristic of T cells in children with atopic dermatitis.
journal_name
Eur J Pediatrjournal_title
European journal of pediatricsauthors
Machura E,Mazur B,Kwiecień J,Karczewska Kdoi
10.1007/s00431-006-0319-5subject
Has Abstractpub_date
2007-08-01 00:00:00pages
789-95issue
8eissn
0340-6199issn
1432-1076journal_volume
166pub_type
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