Bowtie Barcodes for High-Throughput Single-Cell mRNA Sequencing
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Solution Overview
Problem
Current single-cell analysis methods are expensive, require specialized equipment, and lack the high-throughput capacity needed for comprehensive analysis of large samples, making it difficult to analyze rare sequences within large cell populations effectively.
Innovation Solution
A method involving the incorporation of single-stranded DNA (ssDNA) barcoded polynucleotides into nucleic acid origami nanostructures, allowing for the detection of target nucleic acid sequences at the single-cell level without the need for single-cell sorting, using oil-emulsion amplification and reverse transcription with barcoded mRNA capture sequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current single-cell sorting technologies are used, then single-cell analysis capability is achieved, but cost increases and equipment complexity increases
Solution Approach 1:
The patent uses DNA barcodes as molecular copies to identify and track individual cells. Instead of physically sorting cells using complex equipment, the method creates digital copies (barcodes) of cellular genetic material that can be easily amplified and sequenced, replacing complex mechanical sorting devices with simple molecular copying mechanisms
Solution Approach 2:
The patent replaces mechanical cell sorting systems with a molecular biology-based approach. Instead of using physical devices to separate and sort individual cells, the method uses chemical and molecular processes (oil-emulsion PCR, reverse transcription with barcoded primers) to achieve single-cell resolution, substituting mechanical complexity with biochemical simplicity
2Measurement precision
If current single-cell sorting technologies are used, then single-cell analysis capability is achieved, but analysis throughput is limited
Solution Approach 1:
The patent segments the analysis process into parallelizable components: multiple oil-emulsion droplets can be processed simultaneously, each containing barcoded primers for different genes. This segmentation allows independent processing of multiple single-cell analyses in parallel, dramatically increasing throughput while maintaining single-cell resolution
Solution Approach 2:
The barcoded primers serve multiple functions: they act as both cell identifiers and gene-specific probes. This multi-functionality allows the same reagent system to simultaneously perform cell sorting, gene detection, and sequencing preparation, eliminating the need for separate specialized equipment and processes, thereby increasing overall productivity
3Productivity
If bulk cell population lysis is performed, then analysis throughput is increased, but ability to identify rare sequences is lost
Solution Approach 1:
The patent performs preliminary barcoding of individual cells before bulk processing. By assigning unique barcodes to individual cells and amplifying them in parallel oil-emulsion droplets, the method preserves individual cell identity information even as the analysis scales to large cell populations, enabling rare sequence detection maintained through the entire throughput process
Solution Approach 2:
The patent introduces DNA barcodes as intermediary molecules that bridge individual cell identification and bulk analysis. These barcodes serve as mediators that carry cell-specific information through the amplification and sequencing processes, allowing rare sequences to be tracked and identified even within large bulk populations without losing individual cell resolution
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
Enables cost-effective, high-throughput analysis of large cell populations by linking individual genetic sequences and detecting rare cells with high sensitivity, overcoming the limitations of existing technologies in terms of equipment requirements and analysis capacity.
Implementation Method 1
thermal cycling the oil-emulsion droplet comprising the double-stranded (or single-stranded) barcode nucleic acids primers and the 5′-5′ bowtie linker nucleic acid sufficient to result in annealing
Implementation Method 2
annealing of each strand from the double-stranded barcode nucleic acids to complementary sequences on the 5′-5′ bowtie linker nucleic acid
Implementation Method 3
Incorporating can comprise annealing the purified ssDNA barcoded 5′-5′ bowtie polynucleotides to a nucleic acid origami nanostructure
Implementation Method 4
contacting a nucleic acid origami nanostructure obtained according to the method of claim 1 to nucleic acids isolated from a single cell, wherein the nanostructure comprises ssDNA barcoded polynucleotides having barcoded sequences complementary to target nucleic acid sequences
Implementation Method 5
reverse transcribing the recovered target nucleic acid sequences using the ssDNA barcoded polynucleotides as gene-specific primers for reverse transcription
Data Source
AI summary
Methods for incorporation of unique bowtie-barcodes into a nucleic acid origami nanostructure (FIG. 1). In particular, provided herein are methods that facilitate pairing and analysis of nucleic acids from individual cells using, for example, high-throughput next-generation sequencing.