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  • Title: Synovial tissue response to treatment with Campath-1H.
    Author: Ruderman EM, Weinblatt ME, Thurmond LM, Pinkus GS, Gravallese EM.
    Journal: Arthritis Rheum; 1995 Feb; 38(2):254-8. PubMed ID: 7531440.
    Abstract:
    OBJECTIVE: Therapeutic trials in rheumatoid arthritis with the monoclonal antibody Campath-1H have demonstrated recurrent clinical synovitis in some patients, despite profound depletion of circulating lymphocytes. This study was undertaken to examine the cellular infiltrates in synovial tissue at a time of persistent peripheral lymphopenia. METHODS: Immunohistochemical staining of synovial tissue and peripheral blood lymphocyte phenotyping. RESULTS: Synovial tissues from 2 patients with recurrent synovitis after Campath-1H therapy contained significant T lymphocytic infiltrates at a time when circulating T lymphocytes were markedly depleted. CONCLUSION: These results demonstrate that peripheral blood analysis may not accurately reflect the synovial tissue response to monoclonal antibody therapy.
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