Abstract
CD40 and CD154 belong to the tumor necrosis factor (TNF) receptor superfamily and the TNF superfamily, respectively. Evidence is accumulating that indicates the importance of this receptor-ligand pair in the immunopathogenesis of autoimmune diseases. The CD40-CD154 interaction influences antigen presentation, tolerance, autoantibody production and tissue damage, all of which are relevant to the development and perpetuation of autoimmune diseases. Among the collagen diseases, the CD40-CD154 interaction has been intensively investigated in systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). In this article, both basic and clinical research suggesting the involvement of the CD40-CD154 interaction in SLE, RA, inflammatory myopathies, systemic sclerosis and antiphospholipid syndrome are reviewed. The results of clinical trials from CD40-CD154 blockade are also analyzed. CD40-CD154 blockade in animal models of autoimmune diseases has been reported to be a promising novel therapeutic approach and, thus, has attracted great attention from pharmaceutical companies. However, the development of CD40-CD154 blockers with both significant clinical efficacy and safety has not been successful and research advances in this field are eagerly awaited.
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