title: Cytokine expression in CD4(+) cells exposed to the monocyte locomotion inhibitory factor produced by Entamoeba histolytica.
abstract: Entamoeba histolytica produces monocyte locomotion inhibitory factor (MLIF), a pentapeptide with in vitro and in vivo anti-inflammatory properties. MLIF may interfere with leukocyte migration, disturbing the balance of pro- and anti-inflammatory cytokines secreted by CD4(+) T lymphocytes. We evaluated the effect of MLIF on expression of pro- and anti-inflammatory cytokines in human CD4(+) T lymphocytes. Regulatory cytokines [interleukin-1 beta (IL-1beta), IL-2, interferon gamma (IFN-gamma), IL-5, IL-6, and IL-10] were studied by enzyme-linked immunosorbent assay method in CD4(+)-cell supernatant fluids. Proinflammatory cytokines were produced per se by MLIF (IL-1beta, IL-2, and IFN-gamma) and also anti-inflammatory cytokines (IL-5, IL-6, and IL-10) with 1-phorbol-12 myristate-13 acetate + MLIF; the IL-1beta, IFN-gamma, IL-5 and IL-6 production was inhibited but not that of IL-10 which disclosed increase in its expression. MLIF disturbs the pro- and anti-inflammatory balance, and it induces inhibition of IL-1beta (principal proinflammatory cytokine) and increases IL-10 (prototype of an anti-inflammatory cytokine).
authors.affiliation: Unidad de Investigación Médica en Inmunología, Hospital de Pediatría, Centro Médico Nacional Siglo XXI (CMN-SXXI), Instituto Mexicano del Seguro Social, Mexico City, DF, Mexico. srdotor@yahoo.com.mx
authors.forename: Sara
authors.initials: S
authors.lastname: Rojas-Dotor
authors.forename: Guadalupe
authors.initials: G
authors.lastname: Rico
authors.forename: Julia
authors.initials: J
authors.lastname: Pérez
authors.forename: Juan
authors.initials: J
authors.lastname: Velázquez
authors.forename: Raúl
authors.initials: R
authors.lastname: Silva
authors.forename: Esther
authors.initials: E
authors.lastname: Morales
authors.forename: Roberto
authors.initials: R
authors.lastname: Kretschmer
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis*; D004748:Entamoeba histolytica / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D008297:Male; D009842:Oligopeptides / Q000276:immunology*; D015800:Protozoan Proteins / Q000276:immunology*
chemical_list: D016207:Cytokines; D009842:Oligopeptides; D015800:Protozoan Proteins; C430647:monocyte locomotion inhibitory factor