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Events mediated by immunoglobulin E (IgE) may be related to platelet activation and aggregation, and there may be an association between IgE and pulmonary thromboembolism (PTE). Fourteen patients with PTE were studied with regard to serum concentrations of IgE, IgA, IgG, IgM, fibrinogen, and D-dimer and with regard to blood neutrophil, lymphocyte, platelet, and eosinophil counts during acute an...
Omalizumab, an anti-IgE antibody, used to treat severe allergic asthma and chronic idiopathic urticaria, binds to IgE in blood or membrane-bound on B lymphocytes but not to IgE bound to its high (FcεRI) or low (CD23) affinity receptor. Mutagenesis studies indicate overlapping FcεRI and omalizumab-binding sites in the Cε3 domain, but crystallographic studies show FcεRI and CD23-binding sites tha...
In vivo experiments using anti-IgE antibodies have clearly documented that they inhibit IgE production. In vitro experiments showed that not only IgE synthesis but also the effector phase of the allergic response may be influenced, because anti-IgE antibodies can prevent basophil sensitiziation with IgE or even remove IgE-receptorbound IgE molecules. However, the question remains whether natura...
Food protein induced enterocolitis syndrome (FPIES) is a food-related non-IgE-mediated gastrointestinal hypersensitivity disorder. Atypical FPIES is characterized by the presence of specific IgE for the causative food. The guidelines suggested for diagnostic oral food challenge in pediatric patients affected by suspected FPIES are different from the ones for children with IgE-mediated food alle...
IgE is a central molecule in allergic disease. We have isolated cDNAs coding for the heavy and light chains of a murine mAb specific to human IgE and expressed a recombinant single-chain variable fragment (ScFv) derived thereof in Escherichia coli. The purified recombinant ScFv has a molecular mass of 28 kDa as measured by mass spectrometry and shows a beta-sheet fold as determined by circular ...
Murine monoclonal IgE interacts with B cells of BALB/c mouse spleen with greater efficiency in the presence of its specific antigen. Complexes of anti-DNP IgE and DNP-OVA not only resist elution from B lymphocytes by acid but have a substantially longer dissociation half-time when compared with monomeric IgE (440 vs. 8 min, respectively). Further, these IgE-antigen complexes induce Fc epsilon R...
M to 2.8 x 10'0/M, averaging 7.7 x 109/M. Unexpectedly, the total number of IgE receptors/basophil was closely related to the serum IgE level. (r8 = 0.92, P < 0.001). Thus, either there is genetic association between serum IgE and the number of basophil IgE receptors, or, more likely, the receptor number is modulated by the serum IgE concentration.
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