title: Induction of T-cell proliferation and enhancement of NK activity by supernatants from Con A-stimulated human peripheral blood mononuclear cells: a new lymphokine.
abstract: Supernatants from human peripheral blood mononuclear cells activated by Con A contain a factor(s) that stimulates blastogenic activity of normal human peripheral blood mononuclear cells. This Con A supernatant (CAS) contains stimulatory activity for E-rosette positive lymphocytes (T cells) and requires adherent cells for stimulation of T-cell proliferation. CAS does not contain detectable amounts of IL-2 as determined by its inability to support CTLL cell growth. Nor does it contain IL-1 or interferon. Examination of functional activity of lymphocytes stimulated for 3 days by CAS revealed that NK activity is augmented. This supernate does not appear to have any direct effect on B-cell function, although it induces suppression of polyclonal PWM stimulation of immunoglobulins. Thus, CAS appears to contain a new cytokine with immunomodulating potential.
mesh_terms: D002455:Cell Division / Q000187:drug effects; D003208:Concanavalin A / Q000494:pharmacology*; D006801:Humans; D007372:Interferons / Q000032:analysis; D007375:Interleukin-1 / Q000032:analysis; D007376:Interleukin-2 / Q000032:analysis; D007694:Killer Cells, Natural / Q000187:drug effects* / Q000276:immunology; D008213:Lymphocyte Activation / Q000187:drug effects; D008222:Lymphokines / Q000302:isolation & purification* / Q000494:pharmacology; D013268:Stimulation, Chemical; D013601:T-Lymphocytes / Q000187:drug effects* / Q000276:immunology
chemical_list: D007375:Interleukin-1; D007376:Interleukin-2; D008222:Lymphokines; D003208:Concanavalin A; D007372:Interferons