Zika Antigen Potency Detection via Homogeneous Microsphere Assay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for characterizing the antigenicity and potency of vaccine antigens, particularly for Zika virus, face challenges such as cross-reactivity with other flaviviruses, complexity in diagnosis, and the need for rapid, robust, and specific detection methods that can handle low sample volumes with minimal false positives and negatives.
Innovation Solution
A method utilizing a kit comprising acceptor and donor microspheres and antibodies that bind specifically to Zika virus antigens, allowing for a proximity reaction to produce a signal indicative of antigen potency, enabling sensitive and specific detection without washing steps and with low background noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used for antigen characterization, then cross-reactivity with other flaviviruses occurs, but measurement precision and specificity deteriorate
Solution Approach 1:
The patent uses a sandwich assay format with two different antibodies (capture antibody and detection antibody) that bind to different epitopes on the Zika virus antigen. This intermediary binding approach ensures high specificity by requiring both antibodies to bind simultaneously, preventing cross-reactivity with other flaviviruses while maintaining high measurement precision for Zika antigen potency detection.
2Productivity
If rapid detection methods are implemented, then productivity increases, but measurement precision may deteriorate
Solution Approach 1:
The patent replaces complex mechanical washing and multiple-step processing with a homogeneous sandwich assay that can be detected directly in solution. The use of labeled detection antibodies allows for rapid signal generation without time-consuming washing steps, achieving both high productivity through fast detection and maintained measurement precision through specific antibody-antigen binding.
3Measurement precision
If complex assay procedures are used, then measurement precision improves, but device complexity and ease of operation worsen
Solution Approach 1:
The patent combines the capture and detection functions into a single homogeneous sandwich assay procedure. The capture antibody is immobilized on solid support, and the detection antibody is added in the same well without requiring separate processing steps. This merging of steps maintains measurement precision through specific dual-antibody binding while significantly reducing device complexity and improving ease of operation.
4Measurement precision
If high sensitivity detection is implemented, then measurement precision improves, but background noise increases
Solution Approach 1:
The patent converts the potential harm of background noise into benefit by using a sandwich assay format where the signal is generated only when both capture and detection antibodies bind to the antigen. This dual-binding requirement creates a highly specific signal that stands out against background noise, achieving high detection sensitivity while maintaining low background levels through the specificity of the antibody-antigen interactions.
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 rapid, sensitive, and specific means to determine antigen potency, reducing cross-reactivity and enabling high-throughput analysis, suitable for vaccine production monitoring, with low detection costs and minimal false results.
Implementation Method 1
the acceptor microsphere is capable to accept energy which is transferred in a proximity reaction to produce a signal
Implementation Method 2
the donor microsphere is capable to donate energy which is transferred in a proximity reaction to produce a signal by the acceptor microsphere
Implementation Method 3
allowing for a proximity reaction to produce a signal indicative of antigen potency, enabling sensitive and specific detection
Data Source
AI summary
The present disclosure relates to a method for determining the potency of an antigen sample such as a vaccine antigen sample. The present disclosure is also related to a method for monitoring the potency of a vaccine antigen during the production process including purifying, inactivating and formulating the vaccine antigen and to a method for producing a virus vaccine. Further, the present disclosure relates to vaccines obtainable by the methods disclosed. In certain embodiments of the present invention the antigen sample is a zika virus antigen sample.