Minactivin expression in human monocyte and macrophage populations

R W Stephens, J P Golder, D R Fayle, D A Hume, A J Hapel, W Allan, C J Fordham, W F Doe

Research output: Contribution to journalArticlepeer-review


Adherent monolayer cultures of human blood monocytes, peritoneal macrophages, bone marrow macrophages, and colonic mucosa macrophages were examined for their ability to produce and secrete minactivin, a specific inactivator of urokinase-type plasminogen activator. All except colonic mucosa macrophages produced and secreted appreciable amounts of minactivin, but only blood monocytes were stimulated by muramyl dipeptide (adjuvant peptide) to increase production. The minactivin from each of these populations could be shown to preferentially inhibit urokinase-type plasminogen activator and not trypsin, plasmin, or "tissue"-type plasminogen activator (HPA66). A plasminogen-activating enzyme present in monocyte cultures appeared unaffected by the presence of minactivin and could be shown to be regulated independently by dexamethasone.
Original languageEnglish
Pages (from-to)333-7
Number of pages5
Issue number2
Publication statusPublished - Aug 1985


  • Acetylmuramyl-Alanyl-Isoglutamine
  • Bone Marrow Cells
  • Cell Count
  • Cell Differentiation
  • Cells, Cultured
  • Colon
  • Humans
  • Intestinal Mucosa
  • Lipopolysaccharides
  • Macrophages
  • Monocytes
  • Peptide Hydrolases
  • Peritoneum
  • Plasminogen Activators
  • Plasminogen Inactivators
  • Polyethylene Glycols
  • Urokinase-Type Plasminogen Activator


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