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Immunity. 2008 Jan;28(1):18-28. doi: 10.1016/j.immuni.2007.12.004.

Sites and stages of autoreactive B cell activation and regulation.

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Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA. <>


B cells are essential for the development and pathogenesis of both systemic and organ-specific autoimmune diseases. Autoreactive B cells are typically thought of as sources of autoantibody, but their most important pathogenetic roles may be to present autoantigens to T cells and to secrete proinflammatory cytokines. A rate-limiting step in the genesis of autoimmunity then is the activation of autoreactive B cells. Here, mechanisms are discussed that normally prevent such activation and how they break down during disease. Integrating classic work with recent insights, emphasis is placed on efforts to pinpoint the precursor cells for autoantibody-secreting cells and the unique stimuli and pathways by which they are activated.

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