Anti-IgE monoclonal antibody (omalizumab) in the treatment of atopic asthma and allergic respiratory diseases

Current Drug Targets. Inflammation and Allergy
Gennaro D'AmatoMario Cazzola

Abstract

Since the discovery of immunoglobulin E (IgE) antibodies thirty-six years ago, our understanding of the mechanisms of allergy has improved to such an extent that we can now better differentiate allergy from non-allergic hypersensitivity, and allergic/atopic from intrinsic/non-atopic bronchial asthma. IgE antibodies are crucial immune mediators of airway inflammation in allergic atopic asthma and IgE-mediated hypersensitivity reactions are the likely mechanisms of allergen-induced airway obstruction. In addition, IgE may cause chronic airway inflammation in asthma through effector cells activated via high-affinity (Fcepsilon RI) or low-affinity (Fcepsilon RII) IgE receptors. Therapeutic anti-IgE antibodies able to reduce free IgE levels and to block the binding of IgE to Fcepsilon RI without cross-linking IgE and triggering degranulation of IgE-sensitised cells have been developed. This non-anaphylactogenic anti-IgE monoclonal antibody (rhuMAb-E25; omalizumab) binds IgE at the same site as these antibodies bind Fcepsilon RI and Fcepsilon RII. As a consequence, omalizumab inhibits IgE effector functions by blocking IgE binding to high-affinity receptors on IgE effector cells and does not cause mast cell or basophil activation bec...Continue Reading

Citations

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