Microfluidic dPCR System for High-Sensitivity Analyte Quantification
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Solution Overview
Problem
Digital Polymerase Chain Reaction (dPCR) technologies face challenges in adoption due to higher costs, complexity, and lower throughput compared to traditional quantitative real-time PCR (qPCR), particularly in clinical settings for applications like rare mutation detection and viral load quantification.
Innovation Solution
The method involves contacting an analyte with a binding reagent comprising a binding probe and a nucleic acid molecule, denaturing the nucleic acid to generate detectable signals for analyte identification, using a microfluidic device to partition and quantify analytes, and processing signals to generate denaturation profiles for accurate detection and quantification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dPCR is used for rare mutation detection and viral load quantification, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The system partitions the sample into multiple discrete reaction chambers or droplets, allowing parallel processing of numerous samples simultaneously. This segmentation enables digital PCR to achieve higher measurement precision through statistical analysis of partitioned reactions while maintaining manageable system complexity through automated fluid handling.
Solution Approach 2:
The patent employs microfluidic devices as intermediary components that automate sample preparation, partitioning, and reagent delivery. These intermediary systems bridge the gap between simple sample input and complex digital PCR analysis, reducing the operational complexity for users while maintaining high detection sensitivity.
2Measurement precision
If dPCR is used for rare mutation detection and viral load quantification, then measurement precision is improved, but productivity decreases
Solution Approach 1:
By dividing the sample into many small partitions that can be processed in parallel, the system achieves both high measurement precision through individual reaction analysis and improved productivity through simultaneous processing of multiple partitions, resolving the contradiction between sensitivity and throughput.
Solution Approach 2:
The system performs preliminary sample preparation, partitioning, and reagent distribution automatically before the actual PCR amplification. This preliminary automation reduces hands-on time and enables higher throughput while maintaining the measurement precision benefits of digital PCR.
3Measurement precision
If dPCR is used for rare mutation detection and viral load quantification, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The microfluidic system performs self-service functions including automated sample aspiration, partitioning, reagent delivery, and data analysis. This automation eliminates complex manual operations while preserving the high measurement precision of digital PCR, making the system easier to use without sacrificing detection sensitivity.
Solution Approach 2:
The patent introduces automated microfluidic intermediaries that handle complex sample preparation and processing steps. These intermediaries shield the user from operational complexity while enabling the system to achieve high measurement precision through controlled digital PCR reactions.
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 enables reduced-cost, simplified, and accurate detection and quantification of analytes, improving the efficiency and reliability of dPCR systems for clinical applications by leveraging microfluidic technology and signal processing.
Implementation Method 1
a binding probe having binding specificity for the analyte
Implementation Method 2
denaturing at least a portion of the nucleic acid molecule or derivative thereof
Implementation Method 3
partitioning the plurality of binding reagents into a plurality of partitions
Data Source
AI summary
The present disclosure provides methods and systems for analysis of an analyte. Analysis of an analyte may include contacting an analyte with a binding reagent, which binding reagent may include a binding probe with specificity for the analyte and a nucleic acid molecule. The nucleic acid molecule may be denatured and signals indicative of the denaturing of the analyte may be collected. The collected signals may be used to detect, identify, or quantify the analyte.