Microfluidic Partitioning for Nucleic Acid Detection
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Solution Overview
Problem
Conventional nucleic acid amplification and immunological assays face inefficiencies and reduced sensitivity, particularly when analyzing rare cells or molecules in excess backgrounds, and are costly for multiplex PCR applications.
Innovation Solution
The method involves partitioning a sample into multiple sub-samples, amplifying target sequences, and pooling amplicons to enhance detection sensitivity and efficiency, using a massively partitioning device (MPD) with elastomeric microfluidic technology to isolate and analyze nucleic acids and cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional nucleic acid amplification assays are used to detect rare cells or molecules in a large excess of non-target cells, then the assay can be performed with standard reagents and equipment, but the efficiency and sensitivity of the assay is reduced
Solution Approach 1:
The invention partitions the sample into thousands of individual reaction chambers, isolating target molecules from non-target background. This segmentation allows rare target cells or molecules to be detected in their own dedicated chambers, eliminating interference from excess non-target cells and dramatically improving assay sensitivity.
2Adaptability or versatility
If multiplex PCR is used to detect multiple different targets in a single sample, then comprehensive detection can be achieved, but the approach is expensive and inefficient
Solution Approach 1:
The invention partitions the sample into thousands of individual reaction chambers, with each chamber potentially containing different reagent combinations for detecting different targets. This segmentation enables parallel detection of multiple targets across different chambers, achieving comprehensive multiplex detection while improving efficiency through spatial parallelization and reduced reagent cross-contamination.
3Measurement precision
If conventional assay methods are used for genetic or phenotypic analysis of rare cells, then standard protocols can be followed, but additional manipulations and significant amounts of expensive reagents are required
Solution Approach 1:
The invention partitions the sample into thousands of individual reaction chambers, concentrating rare target cells into specific chambers while diluting non-target background. This segmentation reduces the amount of expensive reagents needed per target cell, as each chamber contains only the necessary reagents for detecting targets in that specific partition, eliminating the need for additional manipulations and reducing overall reagent consumption.
Data Source
AI summary
The invention relates to methods, reagents and devices for detection and characterization of nucleic acids, cells, and other biological samples. Assay method are provided in which a sample is partitioned into sub-samples, and analysis of the contents of the sub-samples carried out. The invention also provides microfluidic devices for conducting the assay. The invention also provides an analysis method using a universal primers and probes for amplification and detection.