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| immunoglobulin E | |
|---|---|
| Name | Immunoglobulin E |
| Type | Antibody |
immunoglobulin E
Immunoglobulin E is a class of antibody involved primarily in defense against parasitic Treponema pallidum and helminthic infections and in the pathophysiology of allergic diseases such as those affecting patients seen by clinicians at Mayo Clinic and Johns Hopkins Hospital. First identified through work at institutions including University of Cambridge and Karolinska Institutet, IgE mediates immediate hypersensitivity reactions that have been studied in contexts ranging from experiments at Cold Spring Harbor Laboratory to clinical trials sponsored by organizations like the National Institutes of Health. Its discovery influenced research programs at universities such as Harvard University, Stanford University, and University of Oxford and has informed public health guidance from agencies like the World Health Organization.
IgE is a monomeric immunoglobulin of the epsilon isotype with a molecular weight ~190 kDa comprising two heavy epsilon (ε) chains and two light chains, structurally characterized by constant and variable domains elucidated in structural biology centers such as Max Planck Society and European Molecular Biology Laboratory. Crystallographic and cryo-EM studies performed at facilities like Brookhaven National Laboratory and Lawrence Berkeley National Laboratory revealed the Fc region mediates high-affinity binding to FcεRI on effector cells similar to other Fc-mediated interactions studied in the context of antibodies at Salk Institute and Cold Spring Harbor Laboratory. Glycosylation patterns produced by glycoprotein research groups at ETH Zurich and Massachusetts Institute of Technology affect stability and receptor interactions, akin to post-translational modifications investigated at Rockefeller University and California Institute of Technology.
The epsilon heavy chain is encoded by the IGHE gene located on chromosome 14, mapped in genomic projects involving Human Genome Project collaborators at Whitehead Institute and Wellcome Trust Sanger Institute. Class switch recombination to IgE from μ or γ heavy chains is initiated by activation-induced cytidine deaminase (AID), a mechanism characterized in laboratories such as National Cancer Institute and Institut Pasteur. Transcriptional regulation involves promoters and enhancers studied in genetic research at Broad Institute and University of California, San Francisco, with CSR occurring in B cells within secondary lymphoid tissues like lymph nodes and spleens examined in immunology centers such as Imperial College London and University College London.
IgE binds FcεRI and low-affinity FcεRII (CD23) on cells including mast cells and basophils—cells explored in histology at institutions like Karolinska Institutet and Weizmann Institute of Science—leading to cell activation, degranulation, and release of mediators such as histamine, leukotrienes, and cytokines in paradigms studied by researchers affiliated with Columbia University and University of Pennsylvania. IgE-mediated antibody-dependent cellular cytotoxicity against parasites has parallels with immune effector functions investigated at Yale University and Duke University Medical Center, and cross-linking of IgE by multivalent antigens triggers signaling cascades involving Src-family kinases and Syk kinase characterized at laboratories such as University of Chicago and Friedrich Miescher Institute.
IgE is central to Type I hypersensitivity reactions underlying conditions treated at clinics like Cleveland Clinic and Mount Sinai Hospital, including allergic rhinitis, atopic dermatitis, food allergy, and asthma managed in specialized centers such as Royal Brompton Hospital and Children's Hospital of Philadelphia. Epidemiological studies by groups at Centers for Disease Control and Prevention and surveillance networks in collaboration with European Centre for Disease Prevention and Control have linked rising atopic disease prevalence to environmental changes studied by researchers at University of California, Berkeley and University of Washington. Clinical descriptions of anaphylaxis and its management appear in guidelines from organizations such as American Academy of Allergy, Asthma & Immunology and American College of Allergy, Asthma & Immunology.
Serum total and specific IgE measurements form part of diagnostic workflows in laboratories accredited by organizations like College of American Pathologists and analyzed using platforms developed by companies collaborating with National Institutes of Health researchers; assays include immunoassays employed at Quest Diagnostics and Mayo Clinic Laboratories. Skin prick testing and component-resolved diagnostics used in allergy clinics at Johns Hopkins Hospital and UCSF Medical Center assess sensitization, while differential interpretation draws on guidance from bodies such as European Academy of Allergy and Clinical Immunology and World Allergy Organization.
Monoclonal antibodies targeting IgE, notably omalizumab developed through collaborations involving industry and academic partners including Genentech and Novartis, reduce free IgE and are used in severe allergic asthma and chronic spontaneous urticaria treated at tertiary centers such as Mount Sinai Hospital and St Thomas' Hospital. Other biologics and small molecules targeting IgE signaling or downstream mediators are under investigation in clinical trials registered with agencies like the Food and Drug Administration and conducted at trial sites including Mayo Clinic and Vanderbilt University Medical Center. Immunotherapy approaches, including subcutaneous and sublingual modalities developed with contributions from investigators at Karolinska Institutet and McMaster University, aim to induce regulatory immune responses and alter IgE/IgG4 balance.
The epsilon immunoglobulin isotype has been studied across vertebrates by evolutionary biologists at institutions such as University of Cambridge and Smithsonian Institution, with comparative immunology research at University of Tokyo and Australian National University tracing the emergence of IgE-like isotypes in mammals and their divergence from IgG and IgA lineages characterized in phylogenetic analyses conducted at Oxford University and University of California, Davis. Studies of parasite-driven selection and host–pathogen coevolution involving fieldwork supported by organizations like National Geographic Society and museums such as the American Museum of Natural History have illuminated pressures shaping IgE function.
Category:Antibodies