Partitioning Indicator Displacement Assay Lamellar Phase
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Solution Overview
Problem
Current biosensors face limitations such as low signal-to-noise ratio and sensitivity in indicator displacement assays (IDAs), which hinder their full capability in detecting analytes effectively.
Innovation Solution
A method involving a partitioning indicator displacement assay (PIDA) is developed, where an indicator in an organic phase is displaced into an aqueous phase upon the presence of an analyte, utilizing complex supramolecular receptors that form transiently in the organic phase or at the interface, allowing for the detection of analytes through the formation of a lamellar phase and interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional indicator displacement assays are used, then the detection method is simple, but the signal-to-noise ratio and sensitivity are low
Solution Approach 1:
The system is divided into two distinct phases: an organic phase containing the indicator and aaqueous phase containing the analyte. This segmentation allows the indicator to be concentrated in the organic phase while the analyte remains in the aqueous phase, enhancing the signal-to-noise ratio by spatial separation of detection and analysis components.
Solution Approach 2:
A surfactant is introduced as an intermediary component that forms a lamellar phase at the interface between the organic and aqueous phases. This lamellar phase acts as a mediator that enhances the displacement interaction between the analyte and indicator, thereby improving sensitivity without requiring direct contact between all components.
2Measurement precision
If traditional indicator displacement assays are used, then the assay procedure is straightforward, but the sensitivity of analyte detection is low
Solution Approach 1:
The system exploits changes in partitioning parameters by measuring the displacement of indicator from the organic phase to the aqueous phase upon analyte binding. This parameter change (partitioning coefficient) provides a sensitive readout mechanism that enhances detection sensitivity while managing the complexity of the two-phase system.
Solution Approach 2:
The surfactant undergoes a phase transition to form a lamellar phase at the interface between the organic and aqueous phases. This phase transition creates a structured environment that enhances the displacement interaction and provides a stable platform for sensitive analyte detection, justifying the increased system complexity.
3Productivity
If multiple analytes are detected using separate assays, then each analyte can be detected accurately, but the throughput is low
Solution Approach 1:
The two-phase partitioning system with lamellar phase serves as a universal platform that can detect multiple different analytes by simply changing the indicator or surfactant composition. This multi-functional approach enables high-throughput screening of multiple analytes while maintaining detection accuracy through the robust displacement mechanism.
Solution Approach 2:
The indicator is pre-loaded into the organic phase and the surfactant is pre-positioned to form the lamellar phase at the interface. This preliminary preparation allows multiple analytes to be detected by simply adding them to the aqueous phase, thereby increasing throughput without compromising the accuracy of the displacement-based detection mechanism.
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 enhances the sensitivity and specificity of analyte detection, enabling high-throughput assays for multiple analytes and providing insights into drug interactions and biological systems, with potential applications in pharmacology and biological sciences.
Implementation Method 1
A method involving a partitioning indicator displacement assay (PIDA) is developed, where an indicator in an organic phase is displaced into an aqueous phase upon the presence of an analyte
Implementation Method 2
adding at least one organic solute to the organic phase; putting the first composition and second composition in contact with each other, thereby forming a lamellar phase and an interface between the first composition and second composition
Data Source
AI summary
The present disclosure provides for a method of detecting the displacement of a specific analyte, including providing an indicator in an organic phase to form a first composition; providing an aqueous phase with a test analyte to form a second composition; adding at least one organic solute to the organic phase; putting the first composition and second composition in contact with each other, thereby forming a lamellar phase and an interface between the first composition and second composition; and detecting the presence of the indicator in the organic phase, wherein the presence of the indicator in the organic phase indicates the presence of the specific analyte. The present disclosure also provides for a method of developing a high throughput assay for contemporaneous detection of multiple analytes. Further, the present disclosure provides for a biosensor for detection of a specific analyte.