Encoded Assay Codes for Multiplex Detection With Low Background
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Solution Overview
Problem
Existing assays require high sensitivity and specificity but suffer from low signal levels, complex protocols, and high background noise, necessitating amplification methods that are cumbersome and prone to bias.
Innovation Solution
A methylation-specific encoded assay using a set of codes, each ranging from 3 to 100 nucleotides, with unique sequences to avoid interaction with other components, is employed. This involves a recognition event, transformation event, and detection event to amplify and determine the sequence of codes as surrogates for target analytes, utilizing droplet operations and array substrates for efficient target capture and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual liquid handling and visual inspection methods are used, then operational simplicity is maintained, but productivity and measurement precision deteriorate
Solution Approach 1:
The patent uses digital images as copies of the physical assay plate to enable automated analysis. The imaging system captures optical signals from the plate, creating digital representations that can be processed by software algorithms, replacing manual visual inspection while maintaining the simplicity of the physical assay format.
Solution Approach 2:
The patent replaces manual mechanical liquid handling with automated liquid handling systems that use robotic arms or automated dispensers. These systems precisely dispense reagents into plate wells based on programmed instructions, eliminating manual pipetting while increasing throughput and consistency.
2Productivity
If automated liquid handling systems are implemented, then productivity is improved, but device complexity and cost increase
Solution Approach 1:
The patent describes a modular automated system where a single platform can handle multiple assay types and plate formats. The liquid handling robot, imaging system, and analysis software work together as an integrated universal platform that can be configured for different applications, reducing the need for multiple specialized systems.
Solution Approach 2:
The system incorporates automated plate tracking, well identification, and data management features that eliminate the need for manual intervention. The software automatically processes images, calculates results, and manages assay protocols, reducing the need for highly trained operators and simplifying system operation.
3Measurement precision
If digital imaging and automated analysis are used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system creates digital copies of the assay plate through imaging, allowing repeated analysis of the same data without additional physical manipulation. Multiple images can be captured and analyzed from each plate, enabling verification and re-analysis without consuming additional samples or reagents.
Solution Approach 2:
The system incorporates automated quality control measures where the imaging system captures images that are immediately analyzed by software algorithms. The system provides feedback on image quality, signal intensity, and assay results, automatically flagging outliers or errors for review, which improves measurement precision through systematic validation.
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 method enhances sensitivity and simplifies detection by using codes as surrogates for analytes, allowing for simultaneous detection of multiple targets with reduced background noise and streamlined protocols, enabling efficient cancer screening and diagnosis.
Implementation Method 1
a camera to capture images of the plate
Data Source
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AI summary
A method of conducting an assay for a set of targets, the method comprising: providing a set of targets; subjecting each target of the set of targets to a recognition event, in which each target is uniquely recognized by and bound to a recognition element associated with a code from a set of codes, thereby yielding a set of coded targets comprising the target and the recognition element; subjecting each recognition element of the set of coded targets to a transformation event, in which a molecular transformation of each recognition element produces a modified recognition element, thereby yielding a set of modified recognition elements comprising the code; subjecting each code of the set of modified recognition elements to an amplifying event, in which each code is amplified, thereby yielding a set of amplified codes; subjecting each amplified code of the set of amplified codes to a detection event, thereby determining the nucleic acid sequence of the code.