In Vitro Allergy Testing
In Vitro Allergy Testing - Related Videos
07:22
Basophil Activation Test for Allergy Diagnosis
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Cited by 9 •
2021
The basophil activation test is a complementary in vitro diagnostic test for the evaluation of IgE-mediated allergic reactions based on the detection of basophil activation in the presence of a specific stimulus through the measure of activation markers by flow cytometry.
08:25
Advanced 3D Liver Models for In vitro Genotoxicity Testing Following Long-Term Nanomaterial Exposure
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Cited by 21 •
2020
This procedure was established to be used for developing advanced 3D hepatic cultures in vitro, which can provide a more physiologically relevant assessment of the genotoxic hazards associated with nanomaterial exposures over both an acute or long-term, repeated dose regimes.
05:44
In vitro Cell Culture Model for Toxic Inhaled Chemical Testing
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Cited by 25 •
2014
This protocol is designed to demonstrate exposure method of cell cultures to inhaled toxic chemicals. Exposure of differentiated air-liquid interface (ALI) cultures of airway epithelial cells provides a unique model of airway exposure to toxic gases such as chlorine. In this manuscript we describe effect of chlorine exposure on air-liquid interface cultures of epithelial cells and submerged culture of cardiomyocytes. In vitro exposure systems allow important mechanistic studies to evaluate...
09:52
A Training and Testing System for Performing Vascular Reconstruction In Vitro
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2019
Here we present a training and testing system where a trainee can complete manual vascular reconstruction in vitro individually using a magnetic anchoring technique. The system can also be used to test the quality of reconstruction.
01:13
In Vitro Drug Dissolution: Compendial Testing Models I
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2025
Compendial dissolution methods are standardized procedures defined by pharmacopeias to evaluate the rate at which a drug dissolves in a specific medium. These methods ensure batch-to-batch consistency, enable quality control, and support the prediction of drug bioavailability. They are critical for both immediate and modified-release drug products.The apparatuses used for dissolution testing differ in their design and mechanical function, but all aim to simulate the physiological environment of...
FAQs
The laboratory exposes a patient’s blood sample to a selected allergen and uses an immunoassay to capture allergen-specific immunoglobulin E, or IgE. A detection signal then shows whether those antibodies are present and provides an indication of their level. Testing multiple allergens can associate immune reactivity with specific potential triggers rather than producing only a general allergy result.
Each component answers a different part of the testing question. The selected allergen determines which potential trigger is examined, while the immunoassay captures IgE that recognizes that allergen. The resulting detection signal provides evidence of antibody presence and an indication of quantity. Together, these elements connect a blood-based laboratory measurement with allergen-specific immune sensitization.
The measured signal indicates whether allergen-specific IgE is detected and, when present, gives information about its level. This helps distinguish immune reactivity associated with one allergen from reactivity associated with another. The result can therefore support a more individualized assessment of possible exposures, although its main contribution is identifying sensitization rather than directly describing every clinical feature.
In vitro testing analyzes a blood sample instead of placing allergens on or into the skin. That distinction is important when extensive skin disease makes skin assessment difficult, when medications may interfere with skin-test results, or when direct exposure is unsuitable or impractical. The laboratory approach can still provide allergen-specific IgE information for the diagnostic evaluation.
The process begins with collection of a blood sample, followed by selection of the allergens relevant to the evaluation. An immunoassay is then used to capture antibodies directed against those allergens. Laboratory detection of the assay signal indicates whether allergen-specific IgE is present and provides an associated level for interpretation and clinical decision-making.
It is particularly useful when skin testing is unsuitable, inconclusive, or impractical. Examples supported by the method’s clinical role include extensive skin disease and medication use that interferes with skin-test results. By identifying immune reactivity to particular allergens without directly exposing the patient, the results can support diagnosis, exposure avoidance, and individualized clinical management.