title: Characterization of a cytotoxic CD57+ T cell subset from patients with pulmonary tuberculosis.
abstract: We investigated the proportion, phenotype, and cytotoxicity of CD8+CD57+ and CD57- T cells in peripheral blood from 20 tuberculosis (TB)-patients and 20 healthy tuberculin skin test-positive donors. Our results showed an increase in CD8+CD57+ T cells from TB-patients as compared with those from age-matched healthy donors (p<0.0001). CD8+CD57+ T cells from TB-patients expressed CD69, perforin, granzyme-A, and a CD28-CD62L-CD161- phenotype without recognition for the alpha-galactosylceramide-CD1d complex. This cell subset also expressed TNF-alpha and IFN-gamma, under phorbol-myristate-acetate/ionomycin stimulation. Interestingly, the cytotoxicity against autologous monocytes was higher in CD57- cells from TB-patients and donors than their CD57+ counterparts, in the presence of Mycobacterium tuberculosis H37Rv culture filtrate. However, only CD8+CD57+ T cells from TB-patients exhibited spontaneous cytotoxicity against monocytes in the absence of antigen. Our results suggest that CD8+CD57+ T cells are a subset of effector cells that could be helpful to evaluate the cell-mediated immune response to M. tuberculosis.
authors.affiliation: Departamento de Bioquímica, Instituto Nacional de Enfermedades, Respiratorias, Mexico.
authors.forename: I
authors.initials: I
authors.lastname: Sada-Ovalle
authors.forename: L
authors.initials: L
authors.lastname: Torre-Bouscoulet
authors.forename: R
authors.initials: R
authors.lastname: Valdez-Vázquez
authors.forename: S
authors.initials: S
authors.lastname: Martínez-Cairo
authors.forename: E
authors.initials: E
authors.lastname: Zenteno
authors.forename: R
authors.initials: R
authors.lastname: Lascurain
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000378:metabolism; D000945:Antigens, Differentiation, T-Lymphocyte / Q000378:metabolism; D015415:Biomarkers; D018959:CD57 Antigens / Q000276:immunology*; D005260:Female; D053804:Granzymes / Q000378:metabolism; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism; D037181:Lectins, C-Type; D008297:Male; D008562:Membrane Glycoproteins / Q000378:metabolism; D008875:Middle Aged; D009169:Mycobacterium tuberculosis / Q000276:immunology*; D054353:Perforin; D010641:Phenotype; D052899:Pore Forming Cytotoxic Proteins / Q000378:metabolism; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000378:metabolism; D014397:Tuberculosis, Pulmonary / Q000276:immunology* / Q000378:metabolism / Q000382:microbiology*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism; D000099192:CD69 Antigens
chemical_list: D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D015415:Biomarkers; D018959:CD57 Antigens; D053804:Granzymes; D007371:Interferon-gamma; D037181:Lectins, C-Type; D008562:Membrane Glycoproteins; D054353:Perforin; D052899:Pore Forming Cytotoxic Proteins; D014409:Tumor Necrosis Factor-alpha; D000099192:CD69 Antigens