Autoantibodies against the High-Affinity IgE Receptor as a Cause of Histamine Release in Chronic Urticaria

Abstract
Most urticarias are induced by vasoactive mediators such as histamine released from mast cells. Although mast cells are activated by allergens through cross-linking of cell-surface-bound IgE, this mechanism does not appear to explain most cases of chronic urticaria, which, when allergic, infectious, drug-induced, or physical causes cannot be identified, are classified as idiopathic.

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