title: Phenotypic analysis of a CD2- CD3+ T cell receptor gamma delta lymphocyte subset.
abstract: We have identified, in a patient with atopic dermatitis, a consistent population of peripheral blood lymphocytes expressing a CD3+ gamma/delta TCR complex, while being unreactive with CD2. Further immunofluorescence studies showed that these cells almost completely co-express CD29 and CD45RA and have high membrane levels of CD11a compared to the alpha/beta TCR T cells. Neither a genetic influence nor an acute or reactivated herpesvirus infection were found to be related to the expanded gamma/delta T-cell subpopulation. Our data confirm the previous observations regarding the presence in the peripheral blood of an expanded gamma/delta TCR, CD2- subset and show that these cells have a peculiar phenotypic profile. The reasons for this expansion are, however, still unknown.
authors.affiliation: Department of Microbiology-Immunology, General Hospital, Pordenone, Italy.
authors.forename: P
authors.initials: P
authors.lastname: de Paoli
authors.forename: D
authors.initials: D
authors.lastname: Gennari
authors.forename: G
authors.initials: G
authors.lastname: Basaglia
authors.forename: P
authors.initials: P
authors.lastname: Martelli
authors.forename: G
authors.initials: G
authors.lastname: Santini
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal; D015703:Antigens, CD / Q000032:analysis*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D018801:CD2 Antigens; D017252:CD3 Complex; D003876:Dermatitis, Atopic / Q000276:immunology*; D005260:Female; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D006801:Humans; D010641:Phenotype; D011948:Receptors, Antigen, T-Cell / Q000032:analysis*; D016692:Receptors, Antigen, T-Cell, gamma-delta; D011971:Receptors, Immunologic / Q000032:analysis; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D018801:CD2 Antigens; D017252:CD3 Complex; D011948:Receptors, Antigen, T-Cell; D016692:Receptors, Antigen, T-Cell, gamma-delta; D011971:Receptors, Immunologic