Supersurface Amplicon Clusters for High-Density Sequencing
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Solution Overview
Problem
Current DNA sequencing methods struggle to increase the density and signal intensity of amplified DNA clusters simultaneously, limiting throughput in high-throughput sequencing applications.
Innovation Solution
The method involves using uniquely designed single-strand primers immobilized on a solid surface, where forward and reverse primers are fully or partially complementary, allowing for the generation of clusters of amplicons through a process that includes annealing, extension, and supersurface PCR, with exonuclease treatment to optimize cluster size and intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional amplification methods (bridge amplification, rolling cycle amplification, RPA) are used to increase signal intensity, then the signal-to-noise ratio is improved, but the density of clusters on the surface decreases
Solution Approach 1:
The amplification process is divided into two distinct phases: bridge amplification to generate initial clusters, followed by supersurface amplification to increase signal intensity. This segmentation allows each phase to optimize for its specific function without compromising the other parameter.
Solution Approach 2:
The invention transitions from two-dimensional surface-bound bridge amplification to three-dimensional supersurface amplification by introducing free-floating primers that extend DNA strands vertically off the surface, enabling cluster expansion in the third dimension while maintaining high surface density.
2Quantity of substance
If amplification cycles are increased to improve signal intensity, then more amplicons are generated, but cluster size increases reducing the number of clusters that can be accommodated on the surface
Solution Approach 1:
By enabling DNA strands to extend vertically off the surface during supersurface amplification, the invention allows amplicons to occupy three-dimensional space rather than spreading horizontally across the surface. This dimensional transition increases amplicon copy number without proportionally increasing surface footprint.
Solution Approach 2:
Bridge amplification is performed first to generate initial clusters with sufficient copy number before transitioning to supersurface amplification. This preliminary action establishes a foundation that enables subsequent exponential amplification in the supersurface phase without requiring excessive surface area.
3Ease of manufacture
If bridge amplification is used to generate clusters, then the amplification process is simplified, but the signal intensity and cluster density cannot be simultaneously optimized
Solution Approach 1:
The amplification process is divided into two distinct phases: bridge amplification to generate initial clusters, followed by supersurface amplification to increase signal intensity. This segmentation allows each phase to optimize for its specific function without compromising the other parameter.
Solution Approach 2:
The supersurface amplification phase continues the amplification process initiated by bridge amplification without interruption, maintaining the exponential generation of amplicons while transitioning to a mode that prioritizes signal intensity through vertical cluster expansion.
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 achieves higher cluster density and signal intensity, enabling more efficient high-throughput DNA sequencing by generating smaller, brighter clusters with increased copy numbers and improved sequencing performance.
Implementation Method 1
the 5′ region of the forward primer and the 5′ region of the reverse primer are fully or partially complementary to each other
Implementation Method 2
performing an amplification process on the solid surface to generate the clusters of amplicons
Implementation Method 3
with exonuclease treatment to optimize cluster size and intensity
Data Source
AI summary
The present disclosure describes methods and microfluidic devices for generating clusters of amplicons for a nucleic acid library, and their uses for high-throughput DNA sequencing or detection of target polynucleotides in a sample.