IMMUNOLOGICAL FEATURES OF ALLERGIC AND NON-ALLERGIC FORMS OF ATOPIC DERMATITIS

Abstract

Abstract. In spite of similar clinical patterns, there are numerous differences in immunopathogenesis of intrinsiс and extrinsiс forms of atopic dermatitis. Patients with both forms have decreased levels of CD8+CD25+ lymphocytes, decreased telomere DNA length of CD4+T-cells, decreased migration inhibition index in delayedtype hypersensitivity, decreased levels of CD16+NK-cells, decreased Fc-dependent monocyte and granulocyte phagocytosis, increased hydrogen peroxide production by neutrophils, increased levels of CD19+B-cells, as well as high IgA and IgG immunoglobulin levels. Extrinsiс form of atopic dermatitis are characterized by more severe clinical course, and by involvement of both immediate hypersensitivity (hyperproduction of IgE and decreased T-cells with intracellular IFNγ production), like as delayed-type hypersensitivity (decreased migration index along with decreased migration inhibition index). CD8+ play a large role in extrinsiс form of atopic dermatitis that may be traced as decreased telomere length of CD8+T- cells, decreased levels of CD8+CD45RO+ cells, increased levels of CD8+CD45RA+ naive cells and increased levels of CD28+ costimulatory molecules on CD8+cells. Increased levels of CD4+CD25+bright cells and strongly alterations of innate immunity determined of decreased H2O2 production by monocytes are shown in extrinsiс form. Hence, the severity index of atopic dermatitis is more expressed in extrinsic form of bronchial asthma and it is, probably, determined by more exaggerated immunological alterations.

Keywords

• atopic dermatitis
• immunoglobulin е
• т-cells