Identification of the sheep homologue of the monocyte cell surface molecule--CD14

V K Gupta, I McConnell, R G Dalziel, J Hopkins

Research output: Contribution to journalArticlepeer-review

Abstract

An ovine monocyte/macrophage cell surface antigen was recognized by three mouse monoclonal antibodies (mAbs) VPM65, VPM66 and VPM67. These mAbs also reacted with bovine cells. The antibodies immunoprecipitated a single, glycosyl-phosphatidylinositol-linked polypeptide of M(r) 55,000 which, when deglycosylated, was reduced to M(r) 53,000. They reacted strongly with peripheral blood monocytes, alveolar macrophages and peripheral blood granulocytes, and weakly with afferent lymph dendritic cells. They also reacted with macrophages in many different tissues but were non-reactive with lymphocytes. Competitive flow cytometry shows that these three mAbs recognize the same or a closely related epitope of a single antigen. An antigen-specific capture ELISA using the anti-human CD14 mAb (TUK4) revealed that all four mAbs associate with the same antigen. These data demonstrate that the mAbs react with the ovine homologue of the lipopolysaccharide (LPS)-LPS binding protein receptor, CD14.
Original languageEnglish
Pages (from-to)89-99
Number of pages11
JournalVeterinary Immunology and Immunopathology
Volume51
Issue number1-2
Publication statusPublished - May 1996

Keywords

  • Animals
  • Antibodies, Monoclonal
  • Antigens, CD14
  • Epitopes
  • Female
  • Flow Cytometry
  • Glycosylphosphatidylinositols
  • Immunohistochemistry
  • Macrophages
  • Membrane Proteins
  • Mice
  • Mice, Inbred BALB C
  • Monocytes
  • Precipitin Tests
  • Sheep
  • Tissue Distribution

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