Hollow Polymer Fiber Optics for Portable Singlet Oxygen Detection
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Solution Overview
Problem
Existing bead-based analyte detection technologies, such as AlphaScreen® and AlphaLISA®, are not portable and require samples to be taken back to the laboratory for analysis, limiting their application in field settings, and portable systems lack accuracy and sensitivity.
Innovation Solution
The use of hollow polymer fiber optics doped with acceptor and donor bead dyes that utilize singlet oxygen channeling for analyte detection, enabling portable, easy-to-use systems that provide robust, qualitative and quantitative measurements of single or multiple analytes directly in the field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bead-based assay technologies (AlphaScreen® and AlphaLISA®) are used for analyte detection, then measurement precision and reliability are improved, but device complexity and portability are worsened as they require laboratory infrastructure
Solution Approach 1:
The patent extracts the core detection function from the complex laboratory-based bead assay system by isolating the singlet oxygen generation and detection mechanisms into a portable format. The hollow fiber optic system with integrated photosensitizer and acceptor bead components removes the need for laboratory infrastructure while preserving the proximity-dependent energy transfer detection principle that provides high measurement precision.
Solution Approach 2:
The portable system maintains the universal applicability of AlphaScreen® and AlphaLISA® technologies by preserving the donor bead-acceptor bead interaction mechanism that can detect various analytes including protein-protein interactions, antibody detection, and biomarker measurement. The singlet oxygen channeling through hollow fibers provides a universal detection platform for multiple assay types without requiring laboratory equipment.
2Ease of operation
If portable detection systems are developed for field use, then ease of operation and portability are improved, but measurement precision and sensitivity are worsened compared to laboratory-based systems
Solution Approach 1:
The patent merges the donor bead photosensitizer, acceptor bead signal transducer, and hollow fiber optic waveguide into an integrated portable system. This combination allows the singlet oxygen generated by the photosensitizer to channel through the hollow fiber to excite the acceptor bead fluorophore, providing laboratory-grade detection precision in a field-deployable format that simplifies operation.
Solution Approach 2:
The hollow fiber optic acts as an intermediary medium that guides singlet oxygen from the donor bead to the acceptor bead, enabling energy transfer over distances beyond typical FRET ranges. This intermediary mechanism preserves measurement precision by maintaining efficient energy transfer while allowing flexible positioning suitable for portable field operations.
3Productivity
If multiplexed analyte detection is implemented, then productivity and information content are improved, but device complexity and sample processing requirements are worsened
Solution Approach 1:
The patent extends multiplexing capability by utilizing multiple hollow fibers with different acceptor bead fluorophores that emit at different wavelengths. This dimensional extension allows simultaneous detection of multiple analytes in a single sample by distinguishing signals based on emission wavelength, increasing productivity without proportionally increasing device complexity.
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
The system allows for accurate, multiplexed analyte detection with small sample volumes, simplifying sample procurement and transport, and reducing the need for extensive laboratory analysis by providing reliable field measurements.
Implementation Method 1
The hollow fiber optics carry a signal generated by the dopant via singlet oxygen channeling
Implementation Method 2
Donor beads comprise a photosensitizer, for example, phthalocyanine, which converts ambient oxygen to an excited and reactive form of oxygen, singlet oxygen, upon illumination at 680 nm
Implementation Method 3
If an Acceptor bead is within that proximity, energy is transferred from the singlet oxygen to thioxene derivatives within the Acceptor bead, subsequently culminating in light production
Implementation Method 4
The excited Europium chelate generates an intense light detectable within a much narrower wavelength bandwidth centered around 615 nm
Data Source
AI summary
Presented herein are methods, systems, and apparatus for single analyte detection or multiplexed analyte detection based on amplified luminescent proximity homogeneous assay (“alpha”) technology, but using hollow polymer fiber optics doped with ‘acceptor bead’ dye (e.g., thioxene, anthracene, rubrene, and/or lanthanide chelates) or ‘donor bead’ dye (e.g., phthalocyanine) that carry a signal generated by the dopant via singlet oxygen channeling.