title: IgE-dependent cytokine production by human peripheral blood mononuclear phagocytes.
abstract: These studies demonstrate the IgE-dependent production of IL-1 beta and TNF-alpha by circulating blood monocytes. IL-1 beta production was demonstrated biologically as the stimulation of proliferation of the cloned IL-1-dependent murine T cell line D10.G4.1 in the presence of a submitogenic concentration of PHA. In a representative experiment, 3H-thymidine uptake increased from 57826 cpm in the presence of supernatants obtained from unstimulated cells to 200774 cpm with supernatants from monocytes stimulated by IgE/alpha IgE immune complexes. By ELISA, IgE complexes increased IL-1 beta production from 0.54 +/- 0.06 ng (per 10(6) monocytes) to 2.60 +/- 0.62 ng (p less than 0.01; mean of eight experiments) and TNF-alpha production from 0.17 +/- 0.10 ng to 3.00 +/- 0.54 ng (p less than 0.01; mean of four experiments). No IL-1 alpha secretion was observed. RNA hybridization analysis demonstrated that IL-1 beta production represented de novo synthesis of the cytokine. Stimulated RNA production was observed after a minimal 1/2-h incubation and was maximal at 2 h. The IgE-dependent secretion of these pro-inflammatory cytokines by mononuclear phagocytic cells may contribute to the inflammation characteristic of allergic responses.
authors.affiliation: Department of Medicine, University of Colorado Health Sciences Center, National Jewish Center for Immunology and Respiratory Medicine, Denver 80206.
authors.forename: L
authors.initials: L
authors.lastname: Borish
authors.forename: J J
authors.initials: JJ
authors.lastname: Mascali
authors.forename: L J
authors.initials: LJ
authors.lastname: Rosenwasser
mesh_terms: D015703:Antigens, CD / Q000378:metabolism; D000944:Antigens, Differentiation, B-Lymphocyte / Q000378:metabolism; D001249:Asthma / Q000276:immunology; D001681:Biological Assay; D015152:Blotting, Northern; D015870:Gene Expression; D006801:Humans; D007073:Immunoglobulin E / Q000502:physiology*; D007375:Interleukin-1 / Q000096:biosynthesis* / Q000235:genetics; D009000:Monocytes / Q000378:metabolism*; D011961:Receptors, Fc / Q000378:metabolism; D017455:Receptors, IgE; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis*
chemical_list: D015703:Antigens, CD; D000944:Antigens, Differentiation, B-Lymphocyte; D007375:Interleukin-1; D011961:Receptors, Fc; D017455:Receptors, IgE; D014409:Tumor Necrosis Factor-alpha; D007073:Immunoglobulin E