Multiplex Luminescence Assay Using Singlet Oxygen Activation
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Solution Overview
Problem
Current methods for assessing biological molecule interactions and detecting modulators of these interactions do not effectively monitor modifications resulting from specific interactions between biological molecules.
Innovation Solution
A luminescence assay method using a mixture of solid-phase supports with specific binding agents and a photosensitizer that generates singlet oxygen, activating distinct emission systems to produce distinguishable light signals indicative of molecular interactions and modifications, allowing for the detection of enzyme-substrate interactions and modifications such as phosphorylation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single emission system is used to detect biological molecule interactions, then the assay is simple to perform, but only one type of interaction can be monitored at a time
Solution Approach 1:
The assay system is segmented into multiple independent detection channels, each with its own emission system tuned to a specific wavelength. This allows simultaneous monitoring of multiple biological interactions in parallel without interfering with each other, resolving the contradiction between versatility and complexity by organizing the detection into modular segments.
Solution Approach 2:
The assay mixture contains multiple emission systems that can detect different types of biological interactions simultaneously. The system is designed to be universal in its ability to monitor various interactions (enzyme-substrate, protein-protein, etc.) using a single integrated assay platform, thereby achieving multi-functionality without proportionally increasing operational complexity.
2Loss of information
If multiple emission systems are used to detect different interactions simultaneously, then multiple interactions can be monitored, but the detection system becomes more complex
Solution Approach 1:
Each emission system is locally optimized with specific binding agents and photosensitizers tailored to detect particular modifications or interactions. This local quality approach allows each detection channel to be highly specialized and sensitive to its target, while the overall system manages complexity through modular organization of these specialized components.
Solution Approach 2:
The system employs more emission systems than strictly necessary for basic interaction detection, enabling comprehensive monitoring of multiple interaction types and modifications simultaneously. This excessive action approach ensures complete information capture about biological modifications while managing detection complexity through systematic wavelength assignment and signal processing.
3Measurement precision
If a photosensitizer is used to generate singlet oxygen for activating emission systems, then the assay has high sensitivity, but the assay requires light irradiation which may affect biological molecules
Solution Approach 1:
Light irradiation is applied periodically or in controlled pulses rather than continuously, allowing the assay to achieve necessary sensitivity through repeated activation cycles while minimizing cumulative light-induced damage to biological molecules. This periodic action maintains measurement precision while reducing harmful effects.
Solution Approach 2:
The light irradiation step is performed rapidly and efficiently to complete the singlet oxygen generation and signal detection before significant photodamage can occur. The assay rushes through the critical detection phase quickly, maintaining high sensitivity while minimizing the time window for harmful light effects to manifest.
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
Enables simultaneous monitoring of biomolecular interactions and activities, including enzyme activity and post-translational modifications, with high sensitivity and specificity, facilitating the detection and characterization of test compounds and their effects on enzymes.
Implementation Method 1
a photosensitizer, the photosensitizer light excitable to activate oxygen to produce singlet oxygen
Implementation Method 2
a first emission system comprising a first energy acceptor activated by singlet oxygen, the first emission system activated by singlet oxygen to emit a first light signal
Implementation Method 3
the first emission system activated by singlet oxygen to emit a first light signal characterized by a first emission spectrum
Data Source
Figure 1
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Figure 3~4
AI summary
Luminescence assays and compositions for assay of biomolecular interaction and activity and detection of modulators of biomolecular interaction and activity are provided. Technology described herein has utility in a variety of assay formats and types, for example, simultaneous monitoring multiple parameters which affect interaction and activity of biological molecules. Compositions and methods are provided herein which include a first solid-phase support associated with a first specific binding agent and a photosensitizer,; a second solid-phase support associated with a second specific binding agent and a first emission system; and a third solid- phase support associated with a third specific binding agent and a second emission system.