Indirect Modulation of Detection Environment Using Activatable Stimulants
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Solution Overview
Problem
Affinity-based diagnostic tests face challenges with cross-reactivity and background noise, leading to increased false negative/positive rates and complexity in developing new assays, particularly due to the scarcity of target molecules and limited effectiveness of electrical control methods in modulating biochemical reactions.
Innovation Solution
A method and system that utilize activatable stimulants, such as microcapsule beads containing amphoteric electrolytes, to modify the chemical environment at test sites, altering the affinity between capture molecules and molecules of interest through controlled pH changes, achieved by applying voltages across electrodes, thereby enhancing assay specificity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If affinity-based sensors are used to detect biomarkers, then detection sensitivity is improved, but cross-reactivity to other biomarkers increases leading to false positive/negative rates
Solution Approach 1:
The patent applies local quality by creating distinct microenvironments at different test sites with different pH conditions. Each test site has a specifically tuned pH environment that selectively enhances the affinity between the capture molecule and the target biomarker while suppressing cross-reactivity with non-target biomarkers. This localized pH control allows each test site to have optimized binding characteristics tailored to its specific detection purpose.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the pH parameter at different test sites to modulate protein affinity. By changing the pH parameter, the system can enhance or reduce the binding affinity between capture molecules and biomarkers, thereby improving detection sensitivity for target analytes while minimizing cross-reactivity with interfering substances.
2Ease of operation
If electrical control methods are used to modulate biochemical reactions, then reaction control is achieved, but effectiveness is limited
Solution Approach 1:
The patent introduces pH as an intermediary mediator between electrical control and biochemical reactions. Instead of applying electrical fields directly to modulate protein-protein interactions, the system uses electrical actuators to adjust the pH environment, which then indirectly controls the biochemical reactions. This intermediary approach overcomes the limitations of direct electrical control by utilizing pH as a more effective mediator for affinity modulation.
3Quantity of substance
If target molecules are scarce in samples, then diagnostic challenges increase, but detection accuracy must be maintained
Solution Approach 1:
The patent applies parameter changes by optimizing pH conditions at test sites to maximize the affinity between capture molecules and scarce target biomarkers. By adjusting the pH parameter to match the optimal binding conditions for specific protein pairs, the system enhances detection sensitivity and accuracy even when target molecule concentrations are very low, thereby maintaining measurement precision despite limited analyte availability.
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 approach significantly reduces cross-reactivity and background noise, improving the sensitivity and accuracy of diagnostic tests by modulating protein affinity with small biases and long experiment times, allowing for more precise control of chemical conditions at multiple test sites.
Implementation Method 1
activatable stimulants, such as microcapsule beads containing amphoteric electrolytes, to modify the chemical environment at test sites, altering the affinity between capture molecules and molecules of interest through controlled pH changes, achieved by applying voltages across electrodes
Implementation Method 2
modifying the local chemical environment at the test site with the first activated stimulant such that chemical conditions at the test site are altered thereby modifying an affinity between a capture molecule at the test site and a molecule of interest
Data Source
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AI summary
A system and method of indirectly modifying an environmental condition at a test site in one embodiment includes providing a test site on a substrate, providing a first activatable stimulant at the test site, providing an actuator configured to activate the first activatable stimulant at the test site, controlling the actuator to activate the first activatable stimulant, and modifying the local chemical environment at the test site with the first activated stimulant.