title: Increased type 2 cytokine expression by both CD4+ CD45RO+ T cells and CD8+ CD45RO+ T cells in blood circulation is associated with high serum IgE but not with atopic dermatitis.
abstract: Type 2 cytokines, such as interleukin-4 (IL-4) and IL-13, are associated with immunoglobulin E (IgE) production. This association has also been observed in CD8+ T cells from patients infected with leprosy and human immunodeficiency virus (HIV). Using intracellular cytokine staining and flow cytometry, the cytokine profile [IL-2, IL-4, IL-10, IL-13, and interferon (IFN)-gamma] of both CD4+ and CD8+ memory/effector T cells circulating in atopic dermatitis (AD) patients was investigated at the single cell level. The levels of type 2 cytokines in CD4+ T cells or CD8+ T cells in AD patients with high levels of serum IgE (AD-H), low levels of serum IgE (AD-L), and healthy controls were compared. Increased production of IL-4 and IL-13 in both CD4+ CD45RO+ T cells and CD8+ CD45RO+ T cells after 4 h in vitro stimulation with phorbol 12-myristate 13-acetate and ionomycin, was more prominent in AD-H patients than in AD-L patients or healthy controls, whereas IFN-gamma-producing CD4+ CD45RO+ T cells and CD8+ CD45RO+ T cells were relatively diminished in AD-H patients. CD4+ T cells and CD8 + T cells from AD-H patients, cultured for 48 h with phorbol 12-myristate 13-acetate and ionomycin, released larger amounts of IL-4 and IL-13 but smaller amounts of IFN-gamma than both types of cells from AD-L patients or healthy controls. In addition, when stimulated with immobilized anti-CD3 monoclonal antibody (MoAb) and anti-CD28 MoAb, CD4+ CD45RO+ T cells and CD8+ CD45RO+ T cells from AD-H patients contained more IL-4-producing cells but fewer IFN-gamma-producing cells compared with healthy controls. Finally, spontaneous mRNA expression of IL-4 in blood CD8+ CD45RO+ T cells isolated from AD-H patients was increased, as determined by reverse transcriptase-polymerase chain reaction. Therefore, in AD patients with high IgE levels, type 2 cytokine (IL-4 and IL-13) expression is associated with IgE production, in both CD4+ CD45RO+ T cell and CD8+ CD45RO+ T cell subsets.
authors.affiliation: Department of Dermatology, Okayama University Medical School, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Tsuji
authors.forename: M
authors.initials: M
authors.lastname: Yamamura
authors.forename: Y
authors.initials: Y
authors.lastname: Morita
authors.forename: H
authors.initials: H
authors.lastname: Kanzaki
authors.forename: J
authors.initials: J
authors.lastname: Tada
authors.forename: H
authors.initials: H
authors.lastname: Makino
authors.forename: J
authors.initials: J
authors.lastname: Arata
mesh_terms: D000293:Adolescent; D000328:Adult; D001775:Blood Circulation / Q000276:immunology; D015496:CD4-Positive T-Lymphocytes / Q000378:metabolism*; D018414:CD8-Positive T-Lymphocytes / Q000378:metabolism*; D002478:Cells, Cultured; D002648:Child; D003876:Dermatitis, Atopic / Q000097:blood*; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D007073:Immunoglobulin E / Q000097:blood*; D007371:Interferon-gamma / Q000097:blood / Q000378:metabolism; D018793:Interleukin-13 / Q000096:biosynthesis* / Q000097:blood / Q000378:metabolism; D015847:Interleukin-4 / Q000096:biosynthesis* / Q000235:genetics / Q000378:metabolism; D008297:Male; D012333:RNA, Messenger / Q000378:metabolism
chemical_list: D018793:Interleukin-13; D012333:RNA, Messenger; D015847:Interleukin-4; D007073:Immunoglobulin E; D007371:Interferon-gamma