Related Experiment Video
Updated: Jun 13, 2026

10:22
Humanized Mediator Release Assay as a Read-Out for Allergen Potency
Published on: June 29, 2021
Standardized allergen extracts: past, present and future
1Nova Southeastern School of Osteopathic Medicine, 5333 North Dixie Highway, Suite 210, Ft. Lauderdale, FL, USA. lindaswolfcox@msn.com
Expert Review of Clinical Immunology
|May 19, 2010
Summary
High-quality allergen extracts are crucial for diagnosing and treating allergies. Standardization ensures extracts are well-characterized with known biologic potency and composition for reliable results.
Area of Science:
- Immunology
- Biochemistry
Background:
- Allergen extracts are complex mixtures essential for allergy diagnosis and treatment.
- Standardization aims to produce well-characterized extracts with known biologic potency and composition.
Purpose of the Study:
- To outline the importance of consistent, high-quality allergen extracts.
- To describe the methods used for allergen extract standardization.
Main Methods:
- Discusses the use of reference extracts for comparison.
- Highlights two primary standardization methods: marking assays and functional assays.
- Explains that marking assays (e.g., monoclonal antibody assays) identify specific proteins but not their biologic action.
- Explains that functional assays (e.g., skin tests) assess biologic function but not specific composition.
Main Results:
- Marking assays provide qualitative protein identification.
- Functional assays provide biologic activity information.
- Neither method alone provides complete characterization of allergen extracts.
Conclusions:
- Consistent, high-quality allergen extracts are vital for accurate allergy diagnosis and effective treatment.
- Current standardization methods (marking and functional assays) have limitations in fully characterizing complex allergen extracts.
- Further development in standardization methods may be needed for comprehensive characterization.
Related Concept Videos
Allergic Reactions
Overview
Allergic Reactions: Anaphylaxis
Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin, heparin),...
Cross-reactivity
Overview
Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs
Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
Antigens Involved in Adaptive Immunity
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Drug Toxicity: Allergic Reactions
Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...

