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The cell surface molecule CD40 is a member of the tumor necrosis factor receptor (TNFR) family and plays a pivotal role in the immune system due in part to its wide tissue distribution. Early studies focused on CD40 in B cell biology, but recent work demonstrates a broader role for CD40 in the immune system contributing to cell-mediated as well as humoral immune responses. Disruption of CD40 and its ligand, CD154 leads to immunodeficiency as in the case of hyper IgM syndrome. Likewise, blockade of CD40-CD154 interactions can be exploited to control misguided autoimmune responses. This article provides a brief overview of CD40 with a focus on its involvement in disease and its usefulness as a therapeutic target.
Vogel et al. (Tue,) studied this question.