title: Enumeration of interleukin-1 producing monocytes from human peripheral blood mononuclear leukocytes by agar plating technique.
abstract: An agar plating technique was developed for enumeration of IL-1-producing monocytes based on the principle that when IL-1-producing monocytes were cocultured with mouse thymocytes and PHA in semisolid agar medium in a plate, mouse thymocytes proliferated around IL-1-producing monocytes resulting in the clusters or colonies of cells. The IL-1-produced clusters or colonies of cells can be counted under a dissecting microscope. Optimal conditions were established for induction and development of IL-1-producing monocytes. The numbers of IL-1-producing monocytes ranged from 819 to 1930 cells/10(5) monocytes, with mean +/- SEM = 1344 +/- 182 cells/10(5) monocytes; the IL-1 activity ranged from 11.7 to 85.9 U/10(5) monocytes/ml, with mean +/- SEM = 42.8 +/- 11.2 U/10(5) monocytes/ml in seven normal subjects. The IL-1 activity per one monocyte ranged from 12.7 to 86.5 mU, with mean +/- SEM = 33.5 +/- 9.8 mU. The mean numbers of IL-1-producing monocytes and the mean IL-1 levels produced by monocytes from the same normal subjects were highly correlated (r = 0.981). The numbers of IL-1-produced colonies resulting from IL-1-producing monocytes could be completely abolished by incorporation of rabbit anti-human IL-1 in the semisolid agarose but not by rabbit anti-human IL-6 or anti-human TNF-alpha.
authors.affiliation: Section of Microbiology, Chiang Mai University, Thailand.
authors.forename: C
authors.initials: C
authors.lastname: Hirunpetcharat
authors.forename: N
authors.initials: N
authors.lastname: Maneekarn
authors.forename: W
authors.initials: W
authors.lastname: Kasinrerk
authors.forename: V
authors.initials: V
authors.lastname: Supajatura
authors.forename: K
authors.initials: K
authors.lastname: Praputpittaya
authors.forename: S
authors.initials: S
authors.lastname: Makonkawkeyoon
mesh_terms: D001681:Biological Assay; D006801:Humans; D066298:In Vitro Techniques; D007375:Interleukin-1 / Q000096:biosynthesis*; D015850:Interleukin-6 / Q000502:physiology; D007958:Leukocyte Count / Q000379:methods; D007963:Leukocytes, Mononuclear / Q000166:cytology; D008213:Lymphocyte Activation; D009000:Monocytes / Q000378:metabolism*; D014409:Tumor Necrosis Factor-alpha / Q000502:physiology
chemical_list: D007375:Interleukin-1; D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha