Distribution of CD45RA and CD45RO T-lymphocyte subsets in rheumatoid arthritis synovial tissue

Alisa E. Koch*, Philip G. Robinson, James A. Radosevich, Richard M. Pope

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


We have characterized the lymphocytes in the synovium of patients with rheumatoid arthritis (RA) by immunohistochemistry using monoclonal antibodies directed against B lymphocytes, T lymphocytes, and antibodies directed against CD45RA and CD45RO, which define T-cell subsets. Both CD45RA+ and CD45RO+ T lymphocytes were detected in the perivascular regions. CD45RA+ lymphocytes were present primarily in perivascular areas of moderate to large lymphocytic infiltration. Some synovial perivascular lymphocytic aggregates were organized into focal areas of CD45RA+ B lymphocytes surrounded by CD45RO+ T lymphocytes. In areas of diffuse lymphocytic infiltration, the T lymphocytes were CD45RO+. These data suggest that both CD45RO+ and CD45RA+ T lymphocytes enter the RA synovial tissue via the synovial vasculature and that, once in the tissue, the CD45RA+ T lymphocytes may undergo activation/maturation and acquire the CD45RO phenotype.

Original languageEnglish (US)
Pages (from-to)192-199
Number of pages8
JournalJournal of Clinical Immunology
Issue number4
StatePublished - Jul 1 1990


  • Lymphocytes
  • immunohistochemistry
  • monoclonal antibodies
  • subsets

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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