title: Application of chromatographic methods to the analysis of macrophage factors induced by Nocardia opaca cell walls.
abstract: Cell walls from Nocardia opaca induce the production of mitogenic factors by mouse peritoneal macrophages in vitro. These factors stimulate thymocytes from C3H/HeJ mice. Supernatants of peritoneal cell culture exhibiting this activity were fractionated by chromatographic procedures such as gel filtration and metal chelate affinity chromatography and the biological activities assayed. These fractionation studies indicate that several biologically active products occur in the supernatant. Four factors monokines (M) with different apparent molecular masses M1 (100,000), M2 (50,000), M3 (16,000) and M4 (7000) were obtained, one of which (M3) was identical to interleukin 1 (IL1). Several of the biochemical parameters of one of these factors, M2, were analyzed. It was found that this monokine had many properties in common with IL1: stimulation of proliferation of thymocytes from C3H/HeJ mice, similar amino acid composition and mobility during isoelectric focusing.
authors.affiliation: IBF Biotechnics, Villeneuve-la-Garenne, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Moroux
authors.forename: E
authors.initials: E
authors.lastname: Boschetti
authors.forename: J P
authors.initials: JP
authors.lastname: Bouvet
authors.forename: R
authors.initials: R
authors.lastname: Barot-Ciorbaru
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002473:Cell Wall / Q000032:analysis* / Q000276:immunology; D002846:Chromatography, Affinity; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D066298:In Vitro Techniques; D007525:Isoelectric Focusing; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D008934:Mitogens / Q000302:isolation & purification*; D009615:Nocardia / Q000032:analysis* / Q000276:immunology
chemical_list: D000596:Amino Acids; D008934:Mitogens