Aptamer-Based Basophil Activation Test for Allergy Diagnosis
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Solution Overview
Problem
Current diagnostic methods for food allergies, such as skin prick tests and serum specific IgE tests, have low specificity and often require oral food challenges, which carry risks and are not practical for widespread use, while existing basophil activation tests are complex and costly to implement.
Innovation Solution
A nucleic acid-based basophil activation test using aptamer ligands that specifically bind to biomarkers on basophils to measure activation upon allergen stimulation, allowing for the calculation of a basophil activation index to determine allergic reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If skin prick test and serum specific IgE test are used for allergy diagnosis, then sensitivity is high, but specificity is low
Solution Approach 1:
The patent introduces basophils as an intermediary element to bridge the gap between IgE sensitization and clinical allergy diagnosis. Basophils serve as a functional mediator that connects the presence of specific IgE antibodies to the actual allergic response, allowing clinicians to observe the functional activation state rather than just the presence of antibodies. This intermediary approach resolves the contradiction by adding a functional assessment layer that improves specificity while maintaining sensitivity.
Solution Approach 2:
The patent replaces the static serological detection method (measuring IgE levels) with a dynamic functional assay (measuring basophil activation). Instead of relying on mechanical/chemical detection of antibodies alone, the system substitutes with a biological functional readout that directly measures the activation of basophils through allergen-specific IgE cross-linking, providing more specific diagnostic information.
2Measurement precision
If oral food challenge is performed to confirm allergy diagnosis, then diagnostic accuracy is improved, but patient safety risk increases
Solution Approach 1:
The patent performs preliminary basophil activation testing before committing to an oral food challenge. This preliminary action provides a functional assessment of allergic potential that can help clinicians decide whether an OFC is necessary, potentially avoiding unnecessary challenges and reducing patient exposure to allergens. The basophil activation results serve as a preliminary screening tool that maintains diagnostic accuracy while minimizing harm.
Solution Approach 2:
The patent introduces basophil activation testing as a cushioning layer between serological testing and oral food challenge. This intermediate functional assessment acts as a protective measure by providing additional diagnostic information that may eliminate the need for OFC, thereby cushioning patients from unnecessary allergen exposure and associated risks while maintaining diagnostic confidence.
3Measurement precision
If basophil activation test is implemented, then diagnostic specificity is improved, but test complexity increases
Solution Approach 1:
The patent extracts the essential functional assessment from the complex basophil activation test by focusing on specific, measurable parameters such as CD63 expression or histamine release. Rather than requiring comprehensive analysis of all basophil functional changes, the system isolates and measures key activation markers, simplifying the test while preserving diagnostic specificity.
Solution Approach 2:
The patent employs fluorescently labeled antibodies that produce color/fluorescence changes upon binding to activated basophil markers. This visual signal change provides a simple, intuitive readout of basophil activation status that can be easily detected and quantified, reducing the complexity of interpretation while maintaining high diagnostic specificity.
4Measurement precision
If basophil activation test is implemented, then diagnostic specificity is improved, but implementation cost increases
Solution Approach 1:
The patent employs disposable flow cytometry tubes or microplate formats for basophil activation testing, eliminating the need for expensive, reusable specialized equipment. These single-use consumables are inexpensive, pre-prepared, and can be processed in standard laboratory equipment, significantly reducing implementation costs while maintaining diagnostic specificity through standardized protocols.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a more accurate, specific, and cost-effective means to diagnose and prognose allergic reactions, enabling better management of food allergies by determining the severity and threshold of allergic responses.
Implementation Method 1
nucleic acid ligands (i.e., aptamer ligands) to measure basophil activation upon allergen stimulation
Data Source
AI summary
The present disclosure relates to aptamer mediated BAT for diagnosing and/or prognosing an individual's allergic reaction to an allergen.