3 research outputs found
CaracterizaciĂłn fenotĂpica y funcional de cĂ©lulas dendriticas en lupus discoide
Tesis (MaestrĂa en Ciencias en InmunologĂa), Instituto PolitĂ©cnico Nacional, SEPI, ENCB, 2009, 1 archivo PDF, (47 pĂĄginas). tesis.ipn.m
O-Glycosylation of NnTreg Lymphocytes Recognized by the Amaranthus leucocarpus Lectin
O-glycosidically-linked glycans have been involved in development, maturation, homing, and immune regulation in T cells. Previous reports indicate that Amaranthus leucocarpus lectin (ALL), specific for glycans containing galactose-N-acetylgalactosamine and N-acetylgalactosamine, recognizes human naĂŻve CD27+CD25+CD4+ T cells. Our aim was to evaluate the phenotype of CD4+ T cells recognized by ALL in peripheral blood mononuclear cells obtained from healthy volunteers. CD4+ T cells were isolated by negative selection using magnetic beads-labeled monoclonal antibodies; the expression of T regulatory cell phenotypic markers was assessed on ALL-recognized cells. In addition, IL-4, IL-10, IFN-Îł, and TGF-ÎČ intracellular production in ALL+ cells was also evaluated. The analyses of phenotypic markers and intracellular cytokines were performed through flow cytometry. ALL-recognized CD4+ T cells were mainly CD45RA+, CCR7+ cells. Although 52±10% CD25+Foxp3+ cells were positive to ALL, only 34±4% of ALL+ cells corresponded to CD25+Foxp3â cells. Intracellular cytokines in freshly obtained ALL+CD4+ T cells exhibited 8% of IL-4, 15% of IL-10, 2% of IFN-Îł, and 15% of TGF-ÎČ, whereas ALLâCD4+ T cells depicted 1% of IL-4, 2% of IL-10, <1% of IFN-Îł, and 6% of TGF-ÎČ. Our results show that galactose-N-acetylgalactosamine and N-galactosamine-bearing CD4+ T cells expressed phenotypic markers of NnTreg cells