Degradable Barcoded Beads for High-Throughput Nucleic Acid Sequencing
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Solution Overview
Problem
Current genomic sequencing methods face challenges in efficiently barcoding and processing sample materials for nucleic acid analysis, particularly in achieving high-throughput and accurate identification of nucleic acid sequences.
Innovation Solution
The development of methods and compositions involving beads covalently attached with polynucleotides, where nucleic acid barcode molecules are released and attached to sample components, enabling efficient barcoding and sequencing through microfluidic devices and emulsion-based systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional barcoding methods are used for nucleic acid samples, then sample identification can be achieved, but throughput and efficiency are limited
Solution Approach 1:
The patent divides the barcoding process into discrete stages: (1) partitioning sample materials into separate compartments, (2) adding barcoded beads to partitions, (3) releasing barcodes from beads, and (4) attaching barcodes to nucleic acid samples. This segmentation enables parallel processing of multiple samples simultaneously, significantly increasing throughput while maintaining manageable complexity through standardized modular steps.
Solution Approach 2:
The patent introduces barcoded beads as intermediary carriers that temporarily hold barcode molecules before transferring them to sample components. These beads serve as a mediating element that facilitates efficient barcode delivery and attachment to nucleic acids, enabling high-throughput processing without requiring direct complex interactions between barcode generation and sample processing systems.
2Measurement precision
If barcode molecules are attached to sample components, then accurate identification is achieved, but the process efficiency is reduced
Solution Approach 1:
The patent performs preliminary actions by pre-synthesizing barcoded beads with attached barcode molecules before sample processing begins. This allows the barcode attachment step to be performed in parallel with sample preparation, and the actual barcode transfer to nucleic acid samples occurs during the sequencing workflow itself, maintaining high accuracy while improving overall processing efficiency through time-saving pre-preparation.
3Reliability
If unique identifiers are used for sample origin, then sample tracking is improved, but the complexity of sample processing increases
Solution Approach 1:
The patent designs barcoded beads that serve multiple functions: they act as carriers for barcode molecules, serve as partitioning references, enable sample tracking through unique identifiers, and facilitate the attachment process to nucleic acid samples. This multi-functionality reduces the number of separate processing components and steps needed, maintaining reliable sample tracking while simplifying the overall processing workflow.
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 allows for precise and scalable barcoding of nucleic acid samples, facilitating high-throughput sequencing and accurate characterization of nucleic acid sequences, enhancing the efficiency of nucleic acid analysis and processing.
Implementation Method 1
the barcode molecules may be released from the first partition by degrading the first partition
Implementation Method 2
at least one of crosslinking of the bead and a linkage between the bead and the barcode molecules may comprise a disulfide linkage
Implementation Method 3
the barcode molecules may be released from the bead by exposing the bead to a reducing agent (e.g., dithiothreitol (DTT) or tris(2-carboxyethyl)phosphine (TCEP))
Implementation Method 4
combining a first aqueous fluid comprising beads with a second aqueous fluid comprising the sample components in a droplet within an immiscible fluid
Data Source
AI summary
This disclosure provides methods and compositions for sample processing, particularly for sequencing applications. Included within this disclosure are bead compositions, such as diverse libraries of beads attached to large numbers of oligonucleotides containing barcodes. Often, the beads provides herein are degradable. For example, they may contain disulfide bonds that are susceptible to reducing agents. The methods provided herein include methods of making libraries of barcoded beads as well as methods of combining the beads with a sample, such as by using a microfluidic device.