Two-Dimensional Monolith Multi-Capillary Array for High-Throughput DNA Sequencing
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Solution Overview
Problem
Current nucleic acid sequencing technologies face challenges in achieving high-throughput, cost-effectiveness, and long read lengths, making them unsuitable for large-scale genome projects and clinical applications, particularly in sequencing single cells and requiring significant resources.
Innovation Solution
A system utilizing a two-dimensional monolith multi-capillary array (2D-MMCA) with capillaries arranged in a fused array, loaded with sequencing products via electrokinetic technology, and equipped with nucleic acid-immobilizing pads and photodetectors for simultaneous analysis of thousands of nucleotide fragments, enabling efficient capillary electrophoresis and fluorescence detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional sequencing methods are used, then sequencing can be performed with simple equipment, but sequencing throughput is low and cost is high
Solution Approach 1:
The system segments the sequencing process into thousands of parallel capillary channels (e.g., 384-capillary arrays), where each capillary independently processes individual nucleic acid samples. This segmentation enables massive parallelization of sequencing reactions, dramatically increasing throughput while maintaining manageable complexity through modular architecture
Solution Approach 2:
The invention transitions from traditional single-file or linear sequencing approaches to a two-dimensional array configuration of capillaries arranged in a grid pattern (e.g., 16x24 configuration). This spatial arrangement in multiple dimensions allows simultaneous processing of thousands of samples, exponentially increasing throughput without proportionally increasing operational complexity
2Productivity
If high-throughput sequencing is achieved, then more samples can be processed, but cost increases significantly
Solution Approach 1:
The system uses identical, replicated capillary units arranged in arrays, where each capillary is a copy of the others. This replication allows parallel processing of multiple samples using the same proven technology platform, achieving high throughput without requiring proportionally more expensive specialized equipment for each channel
Solution Approach 2:
The capillary array system is designed to process multiple types of nucleic acid samples (DNA, RNA, different lengths, different applications) using the same hardware platform. The universal design allows a single system to perform diverse sequencing tasks, maximizing resource utilization and reducing per-sample cost
3Speed
If automated systems are used, then sequencing speed increases, but device complexity and cost increase
Solution Approach 1:
The capillary electrophoresis system performs automated sample injection, separation, and detection without requiring complex robotic manipulation. The electrophoretic process itself automatically separates nucleic acids by size and charge, and the system self-regulates buffer flow and electrical parameters, achieving high speed with relatively simple automation
Solution Approach 2:
The invention replaces complex mechanical sample handling and separation mechanisms with electrical fields for sample injection and separation. Capillary electrophoresis uses electrical mobility differences to separate nucleic acids, eliminating the need for complex mechanical pumps, valves, and moving parts while achieving rapid, automated processing
4Measurement precision
If single-cell sequencing is performed, then genetic information of individual cells can be obtained, but analysis time increases significantly
Solution Approach 1:
The system segments the analysis by allocating individual capillaries to individual single-cell samples, with each capillary dedicated to one sample's complete sequencing process. This segmentation enables simultaneous analysis of multiple single cells in parallel, maintaining the precision required for single-cell resolution while reducing total analysis time through parallel processing
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 significantly increases sequencing throughput, reduces costs, and achieves long read lengths, making it feasible for high-throughput nucleic acid analysis and genome sequencing, including de novo sequencing of large genomes at a lower cost.
Implementation Method 1
The pads of the system can be subjected to an electrical bias that urges nucleic acids from the pad into the capillary tube wherein the nucleic acids are electrophoresed
Implementation Method 2
The illumination excites fluorophores that mark the nucleic acids in the tube and the fluorophores emit light collected by the photodetectors
Data Source
AI summary
This invention discloses a highly efficient method, system and apparatus for nucleic acid analysis, including sequencing (both automated re-sequencing and de-novo sequencing). The system is capable of sequencing DNA sizes ranging from fragments to mammalian size genomes having mouse draft quality at a much reduced cost. The system comprises a massive parallel capillary electrophoretic separation using two-dimensional monolith multi-capillary arrays (2D-MMCA). Sequence identification can be performed using fluorescent or otherwise labeled dideoxynucleotide-terminated DNA extension product generated by gel matrix-, or beads-, or substrate tethered-, or otherwise immobilized colonies of single template molecules. Cost reduction is a significant advantage over currently known methods because of: (i) using massively parallel sub-nanoliter volume reactions; and (ii) employing 2D-MMCAs that increase the throughput of the CE separation and detection by at least two orders of magnitude compared to the commercial high-throughput DNA machines.