Cytokine imbalance in hyper‐IgE syndrome: reduced expression of transforming growth factor β and interferon γ genes in circulating activated T cells
- 9 April 2003
- journal article
- research article
- Published by Wiley in British Journal of Haematology
- Vol. 121 (2), 324-331
- https://doi.org/10.1046/j.1365-2141.2003.04267.x
Abstract
Hyper-IgE syndrome (HIES) is a primary immunodeficiency disease characterized by recurrent infections and marked immunoglobulin (Ig)E elevation. To assess the proper T-cell defects of HIES, the cytokine profile of naturally activated T cells was compared between HIES, atopic dermatitis and chronic granulomatous disease (CGD). Intracellular flow cytometric analysis after in vitro stimulation showed no difference in the proportion of interferon (IFN)gamma- or interleukin 4 (IL-4)-producing T cells among these diseases. Quantitative polymerase chain reaction (PCR) for the cytokine genes was performed using circulating highly fractionated HLA-DR+ and HLA-DR- T cells. The IFNgamma/IL-4 or IFNgamma/IL-10 ratios were lower in HLA-DR+ T cells of HIES than in CGD (P = 0.0106, 0.0445), but did not differ between HIES and atopy. The transforming growth factor-beta (TGFbeta)/IL-4 ratio in HLA-DR+ T cells of HIES was lower than that of atopy (0.0106) or CGD (0.0062). The TGFbeta/IL-4 ratio in HLA-DR- T cells of HIES was also lower than that of atopy (0.0285). Stepwise logistic regression analysis identified TGFbeta/IL-4 ratios in HLA-DR+ (0.0001) or HLA-DR- (0.0086) T cells as the most powerful parameters to distinguish HIES from atopy and/or CGD. Serum IgE levels negatively correlated with IFNgamma/IL-4 (0.0108), IFNgamma/IL-10 (0.0254), or TGFbeta/IL-4 (0.0163) ratios in HLA-DR+, but not HLA-DR-, T cells. These results suggested that the in vivo activated T cells of HIES did not sufficiently express the IFNgamma and TGFbeta genes, which could affect IL-4-dependent IgE production. The reduced TGFbeta expression may involve the indigenous T-cell defects of HIES.Keywords
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