title: Monocyte-derived dendritic cells from chagasic patients vs healthy donors secrete differential levels of IL-10 and IL-12 when stimulated with a protein fragment of Trypanosoma cruzi heat-shock protein-70.
abstract: We analyzed the effect of the truncated heat-shock protein 70 from Trypanosoma cruzi on maturation of human dendritic cells (DCs) derived from monocytes of peripheral blood mononuclear cells from healthy donors and chagasic patients. The results show that the T-HSP70 is capable of maturing human DCs inducing an increase in the expression level of the CD83, CD86 and human leukocyte antigen-DR surface markers, as well as in the secretion of interleukin (IL)-12, tumor necrosis factor-alpha (TNF-alpha) and IL-6 cytokines. Results also show the existence of a differential functional activity of matured DCs from chagasic patients vs healthy donors in response to T-HSP70 protein and to HSP-70-derived A72 peptide, as only T-HSP70-matured DCs from chagasic patients have an enhanced secretion of IL-10 and a reduced secretion of IL-12. Moreover, the addition of A72 peptide to immature DCs from chagasic patients induced an increase in the percentage of cells expressing CD83 and CD86 molecules regarding to the expression level observed by cells from healthy donors. These findings suggest that T. cruzi HSP70 protein may induce a specific maturation profile on chagasic patients' DCs, which would favor the persistence of the parasite in the human host.
authors.affiliation: Grupo de Inmunobiología y Biología Celular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia.
authors.forename: Adriana
authors.initials: A
authors.lastname: Cuellar
authors.forename: Sandra Paola
authors.initials: SP
authors.lastname: Santander
authors.forename: María Del Carmen
authors.initials: Mdel C
authors.lastname: Thomas
authors.forename: Fanny
authors.initials: F
authors.lastname: Guzmán
authors.forename: Alberto
authors.initials: A
authors.lastname: Gómez
authors.forename: Manuel Carlos
authors.initials: MC
authors.lastname: López
authors.forename: Concepción J
authors.initials: CJ
authors.lastname: Puerta
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D017951:Antigen Presentation; D015703:Antigens, CD / Q000096:biosynthesis; D051940:B7-2 Antigen / Q000096:biosynthesis; D002454:Cell Differentiation; D002478:Cells, Cultured; D014355:Chagas Disease / Q000097:blood / Q000276:immunology* / Q000473:pathology; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism / Q000473:pathology; D005260:Female; D018840:HSP70 Heat-Shock Proteins / Q000737:chemistry / Q000276:immunology* / Q000494:pharmacology; D006801:Humans; D007136:Immunoglobulins / Q000096:biosynthesis; D016753:Interleukin-10 / Q000378:metabolism*; D018664:Interleukin-12 / Q000378:metabolism*; D007963:Leukocytes, Mononuclear / Q000473:pathology; D008070:Lipopolysaccharides / Q000494:pharmacology; D008297:Male; D008562:Membrane Glycoproteins / Q000096:biosynthesis; D008875:Middle Aged; D010446:Peptide Fragments / Q000276:immunology / Q000494:pharmacology; D015800:Protozoan Proteins / Q000737:chemistry / Q000276:immunology* / Q000494:pharmacology; D011994:Recombinant Proteins / Q000737:chemistry / Q000276:immunology / Q000494:pharmacology; D014349:Trypanosoma cruzi; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism; D000097802:CD83 Antigen
chemical_list: D015703:Antigens, CD; D051940:B7-2 Antigen; D018840:HSP70 Heat-Shock Proteins; D007136:Immunoglobulins; D016753:Interleukin-10; D018664:Interleukin-12; D008070:Lipopolysaccharides; D008562:Membrane Glycoproteins; D010446:Peptide Fragments; D015800:Protozoan Proteins; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; D000097802:CD83 Antigen