Food Allergen Sensitization
Food Allergen Sensitization - Related Videos
05:37
Analyzing Basophil Activation in the Presence of a Test Allergen using Flow Cytometry
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2025
In this video, we demonstrate the test to evaluate basophil activation in the presence of a test allergen using flow cytometry.
06:34
A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma
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Cited by 4 •
2017
This work describes a protocol that uses a component-resolved approach to study sensitization to grass pollen allergens in a cohort of patients from southern China with allergic rhinitis and/or asthma.
03:31
A Microfluidic Cartridge-Based Detection System for Allergen-Specific Immunoglobulin E
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2025
This video demonstrates a protocol for detecting serum-specific immunoglobulin E using a microfluidic cartridge-based chemiluminescence system. Serum IgEs interact with distinct allergens immobilized in the reaction zone of the cartridge, which are subsequently detected with peroxidase-conjugated anti-IgE antibodies and a chemiluminescent substrate, allowing simultaneous detection of multiple allergen-specific IgEs.
10:42
Flow Cytometric Analysis of Particle-bound Bet v 1 Allergen in PM10
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Cited by 8 •
2016
Here, we present a protocol to quantify allergen-loaded particles by flow cytometry. Ambient particulate matter particles may act as carriers of adsorbed allergens. We show here that flow cytometry, a method widely used to characterize suspended solids >0.5 µm in diameter, can be used to measure these allergen-loaded particles.
12:45
Testing For Genetically Modified Foods
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Genetic modification of foods has been a controversial issue due to debated concerns over health and environmental safety. This experiment demonstrates technical understanding of how food DNA is genetically identified, allowing for educated decision making about the safety and potential dangers of using genetically modified organisms (GMOs) in food supplies. Polymerase Chain Reaction (PCR) is used to amplify food DNA...
FAQs
Antigen-presenting cells process food proteins and activate allergen-specific T helper 2 responses. These T cells provide signals that promote B-cell production of immunoglobulin E, or IgE. The resulting antibody response establishes immune recognition of a particular food protein and prepares IgE-bearing mast cells and basophils to respond during a later exposure.
IgE binds mast cells and basophils through high-affinity receptors, positioning these immune cells to detect the sensitizing food protein efficiently. When a later exposure cross-links the bound IgE, the cells release mediators that produce allergic symptoms. This receptor-based arrangement explains how prior immune priming can lead to a rapid response after re-exposure.
Sensitization establishes allergen-specific immune memory and IgE association with mast cells and basophils, but it does not itself describe the later symptomatic event. Symptoms arise when subsequent exposure cross-links IgE and triggers mediator release. Distinguishing these stages helps clinicians separate immune priming from the clinical reaction that may follow.
The downstream response begins with IgE cross-linking and mediator release, but its clinical expression can vary. The described outcomes include localized gastrointestinal or skin reactions as well as anaphylaxis, a severe systemic reaction. This range makes the sensitization pathway relevant to medical risk assessment, because immune recognition can precede very different levels of clinical severity.
Recognizing the sensitization pathway helps clinicians interpret the possibility that a food protein has elicited an allergen-specific IgE response, even before a later exposure produces symptoms. This knowledge supports allergy diagnosis and risk assessment by connecting immune priming with potential reactions, including gastrointestinal, skin, or severe systemic manifestations.
Understanding how food proteins prime T helper 2 responses and promote IgE production supports prevention planning and treatment development. The overview specifically identifies allergen immunotherapy as a treatment approach and places sensitization knowledge within broader prevention strategies. These applications use the immune pathway to guide efforts to reduce or manage clinically important allergic responses.