title: The purification and biological activity of a macrophage-derived factor with interleukin 1-like activities from guinea pigs.
abstract: A macrophage-derived factor with interleukin 1-like activity was purified from culture supernatant of muramyl dipeptide-stimulated peritoneal exudate macrophages of guinea pigs. Starting with serum-free culture supernatant, the purification was carried out by gel permeation chromatography, affinity chromatography on procion red agarose, removal of carry-over serum proteins by Sepharose-coupled antibodies against bovine serum proteins, anion exchange chromatography and hydrophobic chromatography. The purified sample potentiated the phytohemagglutinin-induced thymidine uptake of thymocytes with a 50% effective concentration of 9.6 X 10(-11) M. The sample showed a single band in polyacrylamide gel electrophoresis, and a 65 kDa band in sodium dodecyl sulfate-polyacrylamide gel electrophoresis by silver staining. A single peak of activity was detected by thymocyte assay at the position corresponding to the stained band in both of the electrophoretic analyses. The purified factor had activities to potentiate the antigenic activation of sensitized T cells for the production of a lymphokine, macrophage migration inhibitory factor, and also the proliferative response of sensitized T cells to antigen. Thus, the 65 kDa factor has activities to modulate various T cell responses in guinea pigs such as interleukin 1 does in other species. The molecular relationship of the 65 kDa macrophage factor to interleukin 1 remains to be determined.
authors.forename: K
authors.initials: K
authors.lastname: Onoue
authors.forename: T
authors.initials: T
authors.lastname: Sasaki
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: B H
authors.initials: BH
authors.lastname: Lin
authors.forename: H
authors.initials: H
authors.lastname: Matsuda
mesh_terms: D000119:Acetylmuramyl-Alanyl-Isoglutamine / Q000494:pharmacology; D000818:Animals; D002478:Cells, Cultured; D004261:DNA Replication; D006168:Guinea Pigs; D007375:Interleukin-1 / Q000276:immunology / Q000302:isolation & purification*; D008198:Lymph Nodes / Q000276:immunology; D008213:Lymphocyte Activation; D008264:Macrophages / Q000187:drug effects / Q000276:immunology*; D008970:Molecular Weight; D009169:Mycobacterium tuberculosis / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D007375:Interleukin-1; D000119:Acetylmuramyl-Alanyl-Isoglutamine