Optical Waveguide Grating Biosensor Label-Free Cell Detection
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Solution Overview
Problem
Current drug discovery processes face high attrition rates due to limited information from early-stage assays, and existing cell-based technologies often rely on complex labeling strategies that can interfere with cellular physiology, necessitating the development of label-free biosensors for more accurate and convenient high-throughput methods.
Innovation Solution
The use of optical waveguide grating biosensors that detect directional mass redistribution in living cells without labels, allowing for real-time monitoring of cellular responses to drug compounds, including signal transduction pathways and cell proliferation, through changes in refractive index and light coupling angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fluorescent labels or luminescence labels are used for imaging-based detection, then detection sensitivity is improved, but device complexity and ease of operation deteriorate due to complex labeling strategies and detection mechanisms
Solution Approach 1:
The patent extracts and eliminates the labeling component from the detection system. By using label-free optical detection methods, the invention removes the need for fluorescent or luminescence labels entirely, thereby simplifying the overall assay system while maintaining detection capability through direct measurement of cellular properties.
Solution Approach 2:
The patent introduces an optical intermediary (evanescent wave field) that mediates between the cellular sample and the detection system. This intermediary enables detection without direct labeling by interacting with the optical properties of cells themselves, thus avoiding the complexity of label-based mechanisms while preserving measurement precision.
2Measurement precision
If fluorescent labels or luminescence labels are used for imaging-based detection, then detection sensitivity is improved, but ease of operation worsens due to complex labeling strategies
Solution Approach 1:
The invention extracts the labeling step from the operational workflow. By implementing label-free detection, the system eliminates the need for users to perform labeling procedures, making the assay easier to operate while maintaining detection sensitivity through direct optical measurement of cellular characteristics.
Solution Approach 2:
The patent enables the cellular sample to serve itself as the detection target. Instead of requiring external labels to make cells detectable, the system utilizes the cells' intrinsic optical properties, thereby simplifying operation by removing the need for users to apply labels while preserving measurement precision.
3Measurement precision
If labels or artificial enhancements are used, then detection capability is improved, but reliability worsens due to adverse effects on cellular physiology
Solution Approach 1:
The patent converts the potential harm of labeling (physiological interference) into a benefit by using label-free detection. This approach eliminates the adverse effects of labels on cellular physiology while maintaining detection capability by measuring intrinsic cellular optical properties, thereby improving reliability without sacrificing measurement precision.
Solution Approach 2:
The invention enables cells to provide their own detection signal through their natural optical properties without requiring artificial enhancements. This self-service approach ensures that cellular physiology remains unaltered, improving the reliability of physiological information while maintaining detection capability through direct measurement.
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 accurate, label-free assessment of cellular responses to drug compounds, providing comprehensive information on cellular effects and reducing the need for complex labeling, thereby improving the efficiency of drug discovery and development processes.
Implementation Method 1
detect directional mass redistribution in living cells without labels, allowing for real-time monitoring of cellular responses to drug compounds, including signal transduction pathways and cell proliferation, through changes in refractive index and light coupling angles
Data Source
AI summary
Disclosed are compositions and methods for using label free optical biosensors for performing cell assays. In certain embodiments the assays can be performed in highthough put methods and can be multiplexed.