Antigen density on the surface of mononuclear cells in SLE

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5 Citations (Scopus)


Searching for the cause of the known immunological abnormalities in systemic lupus erythematosus (SLE), the density of cell surface antigens was measured after immunofluorescent staining in a cell sorter. The densities of CD3, CD4, CD5, CD8 and sIgM lymphocyte antigens were the same on patients' lymphocytes as on lymphocytes from healthy subjects. The intensity of HLA-DR immunofluorescence was found to be decreased on patients' monocytes, while the expression of HLA-DR on lymphocytes of patients with SLE hardly differed from that in healthy subjects. Pretreatment of normal mononuclear cells with patients' sera free from immune complexes decreased the binding of anti-HLA-DR antibody to normal monocytes, but it hardly caused alteration on lymphocytes. After culturing, the expression of HLA-DR antigen on patients' monocytes became the same as on normal cells. A causal role of anti-HLA-DR autoantibodies is suggested and discussed.

Original languageEnglish
Pages (from-to)243-247
Number of pages5
JournalImmunology letters
Issue number3
Publication statusPublished - Jul 1987


  • Density of surface antigen
  • Flow cytometry
  • Immunofluorescence
  • Systemic lupus erythematosus

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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