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lüll The CD28-B7 costimulatory pathway and its role in autoimmune disease Daikh D; Wofsy D; Imboden JBJ Leukoc Biol 1997[Aug]; 62 (2): 156-62The activation of naive CD4+ T cells requires two discrete signals: a signal delivered by the T cell receptor following recognition of antigen and an accessory signal transduced when costimulatory receptors interact with their ligands. Particularly important in the development of an immune response to foreign antigens is the T cell molecule CD28, which delivers a potent costimulus when engaged by ligands, B7-1 and B7-2, on antigen-presenting cells. It is interesting that blockade of B7 molecules, which disrupts interactions with CD28 and prevents delivery of the CD28 costimulus, also alters the immune responses to self antigens and prevents the development of clinical disease in murine models of systemic and organ-specific autoimmunity. Herein we review the roles of CD28 and its B7 ligands in the pathogenesis of autoimmunity, discuss efforts to treat animal models of autoimmunity by modifying the CD28 signal, and consider the mechanisms by which manipulation of the CD28 signal alters the course of experimental autoimmune disease.|*Immunoconjugates[MESH]|Abatacept[MESH]|Animals[MESH]|Antigens, CD[MESH]|Antigens, Differentiation/*pharmacology[MESH]|Autoimmune Diseases/*physiopathology[MESH]|B7-1 Antigen/*physiology[MESH]|CD28 Antigens/*physiology[MESH]|CTLA-4 Antigen[MESH]|Immunosuppressive Agents/pharmacology[MESH]|Ligands[MESH]|Mice[MESH]|Mice, Knockout[MESH]|Signal Transduction[MESH]|T-Lymphocytes/*immunology[MESH] |