Related Experiment Video
Updated: Jan 27, 2026

Induction and Phenotyping of Acute Right Heart Failure in a Large Animal Model of Chronic Thromboembolic Pulmonary Hypertension
Published on: March 17, 2022
Effective treatment of different H1-antihistamine-refractory chronic urticaria phenotypes with omalizumab
1Department of Pediatrics, Division of Pediatric Allergy and Immunology, Adnan Menderes University School of Medicine, Aydın, Turkey.
Omalizumab is a recombinant humanized monoclonal anti-IgE antibody. Until now, the efficiency of omalizumab in chronic spontaneous urticaria has been demonstrated in several studies. However in the literature, data showing the efficiency of omalizumab in different phenotypes of H1-antihistamine-refractory chronic urticaria are limited. In this report, the success of treatment with omalizumab from the first dose is presented in three patients with chronic spontaneous urticaria, chronic autoimmune urticaria, and idiopathic angioedema, who were unresponsive to high-dose H1-antihistamine. The symptoms of all patients resolved with the first dose of omalizumab and no symptom recurrence developed during the follow-up period. In this case presentation, the effective treatment of different phenotypes of H1-antihistamine-refractory chronic urticaria is discussed with a review of the literature.
Omalizumab is a recombinant humanized monoclonal anti-IgE antibody. Until now, the efficiency of omalizumab in chronic spontaneous urticaria has been demonstrated in several studies. However in the literature, data showing the efficiency of omalizumab in different phenotypes of H1-antihistamine-refractory chronic urticaria are limited. In this report, the success of treatment with omalizumab from the first dose is presented in three patients with chronic spontaneous urticaria, chronic autoimmune urticaria, and idiopathic angioedema, who were unresponsive to high-dose H1-antihistamine. The symptoms of all patients resolved with the first dose of omalizumab and no symptom recurrence developed during the follow-up period. In this case presentation, the effective treatment of different phenotypes of H1-antihistamine-refractory chronic urticaria is discussed with a review of the literature.
Related Concept Videos
Upper Respiratory Drugs: First and Second-Generation Antihistamines
Histamine binds to specific receptor sites, known as H1 receptors, on tissue cells, triggering inflammation and swelling. Antihistamines combat these effects by competing with histamine for these receptor sites. By...
Buffer Effectiveness
The buffer capacity is the amount of acid or base that can be added to a given volume...
Framing Effects
Chronic Pharyngitis
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Biological Effects of Radiation

