Characterization of the IL-2-receptor on rheumatoid arthritis synovial fluid T cells

Michael J. Dauphinée, Howard Dang, Eliezer Flescher, Katharine Wilson-Burris, Dionicio Galarza, Karl Hempel, Norman Talal

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We studied the hypoproliferative response of synovial fluid (SF) T cells in rheumatoid arthritis (RA) using a mitogenic monoclonal antibody (MoAb) specific for the T-cell antigen receptor-associated CD3 complex. RASF T cells are defective in their proliferative response and in the induction of the Tac (p55) component of the IL-2-receptor (IL-2-R) when stimulated with anti-CD3 monoclonal antibody (MoAb). However, fresh RASF T cells bear demonstrable IL-2-R in cross-linking experiments which are not seen in unstimulated peripheral blood (PB). These receptors are functional since RASF T cells proliferate in response to recombinant IL-2 (rIL-2) better than fresh PB T cells from either normal or RA patients. Scatchard analysis indicates increased (4-fold) numbers of high affinity IL-2-R on (phytohaemagglutinin) PHA-activated RASF T cells as compared with comparably activated RAPB T cells. Phorbol myristate acetate (PMA) induces Tac antigen expression in RASF but does not lead to proliferation. The hyporesponsiveness of RASF T cells does not appear to result from lack of IL-2-R, lack of IL-2-R inducibility, or proliferative potential.

Original languageEnglish (US)
Pages (from-to)813-824
Number of pages12
JournalJournal of Autoimmunity
Volume2
Issue number6
DOIs
StatePublished - Dec 1989

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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