title: The effect of immunomodulation of stimulator antigen presenting cells on subsequent responder T-cell function.
abstract: In this study, we examined whether lipopolysaccharide (LPS)-, interferon-gamma (IFN-gamma) or 16,16-dimethyl prostaglandin E2 (dmPGE2)-pretreatment of stimulator spleen cells from C57BL6 (B6) mice affects effector function of responder T-lymphocyte from C3H/HeJ mice. Stimulation of B6-derived splenic mononuclear cells (SMNCs) with LPS (10 micrograms/ml) prior to their utilization as stimulator cells in a mixed lymphocyte culture (MLC) resulted in an increase in responder T-lymphocyte proliferation compared to utilization of unstimulated SMNC (P < 0.05). IFN-gamma demonstrated similar effects in a dose dependent fashion with maximal stimulatory effect seen at 1000 U/ml. In contrast, pretreatment of stimulator SMNC with dmPGE2 resulted in dose-dependent inhibition of the responder T-lymphocyte proliferation with maximum inhibitory effect seen using a concentration of dmPGE2 of 10(-5) M. The presence of indomethacin in the MLC did not reverse this effect. These data demonstrate the effect of immunomodulation of stimulator spleen cells on subsequent T-lymphocyte function.
authors.affiliation: Department of Surgery, University of British Columbia, Vancouver, Canada.
authors.forename: S W
authors.initials: SW
authors.lastname: Chung
authors.forename: B
authors.initials: B
authors.lastname: Gould
authors.forename: I
authors.initials: I
authors.lastname: Dziadkowiecz
authors.forename: R M
authors.initials: RM
authors.lastname: Gorczynski
mesh_terms: D015064:16,16-Dimethylprostaglandin E2 / Q000276:immunology / Q000494:pharmacology; D000276:Adjuvants, Immunologic / Q000494:pharmacology*; D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology*; D018122:B7-1 Antigen / Q000378:metabolism; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism; D007371:Interferon-gamma / Q000276:immunology / Q000494:pharmacology; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000276:immunology; D008070:Lipopolysaccharides / Q000276:immunology / Q000494:pharmacology; D008213:Lymphocyte Activation / Q000187:drug effects / Q000502:physiology; D016169:Lymphocyte Function-Associated Antigen-1 / Q000378:metabolism; D051379:Mice; D008815:Mice, Inbred Strains; D013154:Spleen / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D013601:T-Lymphocytes / Q000502:physiology*
chemical_list: D000276:Adjuvants, Immunologic; D018122:B7-1 Antigen; D008070:Lipopolysaccharides; D016169:Lymphocyte Function-Associated Antigen-1; D018799:Intercellular Adhesion Molecule-1; D007371:Interferon-gamma; D015064:16,16-Dimethylprostaglandin E2