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Atopic dermatitis complicated by eczema herpeticum is associated with HLA B7 and reduced interferon‐γ‐producing CD 8+ T cells
Author(s) -
Mathias R.A.,
Weinberg A.,
Boguniewicz M.,
Zaccaro D.J.,
Armstrong B.,
Schneider L.C.,
Hata T.R.,
Hanifin J.M.,
Beck L.A.,
Barnes K.C.,
Leung D.Y.M.
Publication year - 2013
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1111/bjd.12382
Subject(s) - immunology , atopic dermatitis , cd8 , medicine , human leukocyte antigen , antigen , interferon , cytotoxic t cell , allergy , t cell , immune system , biology , biochemistry , in vitro
Summary Background The increased susceptibility of patients with atopic dermatitis ( AD ) to disseminated viral skin infections such as eczema herpeticum ( ADEH +) is poorly understood. Objectives The primary goal of the current study was to determine whether ADEH + subjects have identifiable defects in cell‐mediated immunity that reduce their ability to control viral infections. Materials and methods In this study, we evaluated cytokine expression by various subsets of peripheral blood mononuclear cells from ADEH + ( n = 24) compared with AD without a history of viral infections ( ADEH –) ( n = 20) before and after treatment with herpes simplex virus ( HSV ). Results We found that interferon ( IFN )‐γ expression after HSV treatment was lower in the CD 8+ T cells and monocytes from patients with ADEH + compared with patients who are ADEH – or nonatopic. Given the induction of CD 8+ T cells as the result of antigen presentation by human leucocyte antigen ( HLA ) class I, consistent with the findings described above we also found that the HLA B7 allele was significantly associated with risk of the ADEH + phenotype (odds ratio = 1·91, P = 0·02, 125 ADEH + and 161 ADEH – subjects). Conclusions These data suggest that defects in viral‐induced IFN ‐γ from CD 8+ T cells contribute to the ADEH + phenotype.