Journal
TRENDS IN PHARMACOLOGICAL SCIENCES
Volume 33, Issue 9, Pages 502-509Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tips.2012.06.002
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- NIAID NIH HHS [U19 AI070345] Funding Source: Medline
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Atopic diseases are complex, with many immunological participants, but the central element in their expression is IgE antibody. In an atopic individual, the immune system pathologically reacts to environmental substances by producing IgE, and these allergen-specific IgE antibodies confer to IgE receptor-bearing cells responsiveness to the environmental substances. Mast cells and basophils are central to the immediate hypersensitivity reaction that is mediated by IgE. In humans, there are various other immune cells, notably dendritic cells and B cells, which can also bind IgE. For mast cells, basophils and dendritic cells, the receptor that binds IgE is the high-affinity receptor, Fc epsilon RI. For B cells and a few other cell types, the low affinity receptor, Fc epsilon RII, provides the cell with a means to sense the presence of IgE. This overview will focus on events following activation of the high-affinity receptor because Fc epsilon RI generates the classical immediate hypersensitivity reaction.
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