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Trends Immunol. 2001 Apr;22(4):205-11.

IgA and the IgA Fc receptor.

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Departments of Cell Biology and Immunology and Surgical Oncology, Vrije Universiteit, Van de Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.


IgA has traditionally been regarded a non-inflammatory antibody. This might indeed be true for secretory IgA (SIgA), which exerts its function at mucosal surfaces where commensal microorganisms and dietary antigens prevail. Serum IgA, however, potently triggers (pro)-inflammatory activity upon binding to the myeloid IgA receptor, FcalphaRI. Here, new insights in the roles of IgA and FcalphaRI are addressed and a model integrating the various functions of IgA in immunity is discussed.

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