Single-Cell Nucleic Acid Barcoding via Microfluidic Partitioning
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Solution Overview
Problem
Existing nucleic acid sequencing technologies are ineffective at identifying and characterizing cells at the single cell level, leading to inaccurate data due to ensemble processing methods that amplify majority constituents and fail to preserve the starting ratios of minority components, often requiring large input DNA amounts unobtainable from individual cells.
Innovation Solution
A method involving compartmentalization of nucleic acids from individual cells or small populations into discrete partitions with unique barcodes, allowing for the attribution of genetic material back to the individual cell, using barcoded oligonucleotides and beads to ensure accurate characterization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If ensemble processing methods are used for nucleic acid sequencing, then the sequencing can be performed with sufficient DNA input, but the starting ratios of minority components are not preserved and data accuracy at single cell level is lost
Solution Approach 1:
The patent segments the nucleic acid sequencing process into individual cell-level partitions using microfluidic droplets or wells. Each partition contains nucleic acids from a single cell or small population, preserving the original cellular composition ratios. This segmentation enables accurate single-cell level characterization while maintaining sufficient material for sequencing through subsequent pooling and amplification steps.
2Measurement precision
If nucleic acids from individual cells are processed separately, then accurate single cell characterization is achieved, but the complexity of the processing system increases significantly
Solution Approach 1:
The patent employs universal barcoded oligonucleotide adapters that can be applied to all individual cell partitions simultaneously. These standardized barcodes enable unique identification of each cell's nucleic acids while allowing pooled processing through common amplification and sequencing workflows. This universality reduces system complexity by providing a unified approach that works across all partitions without requiring cell-specific processing protocols.
3Loss of information
If barcoded oligonucleotides are used to attribute genetic material to individual cells, then accurate cell-level attribution is achieved, but the device complexity and processing steps increase
Solution Approach 1:
The patent uses barcoded oligonucleotide adapters that serve as informational copies linking sequencing data back to individual cells. Each adapter contains a unique barcode sequence that is copied onto the nucleic acids from a specific cell, creating a traceable record of origin. This copying mechanism enables accurate cell-level attribution without requiring complex physical tracking systems, as the barcode itself carries the identification information through all subsequent processing steps.
Data Source
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AI summary
The present disclosure provides methods, compositions and systems for analyzing individual cells or cell populations through a partitioned analysis of contents of individual cells or cell populations, such as cancer cells and cells of the immune system. Individual cells or cell populations may be co-partitioned with processing reagents for accessing cellular contents, and for uniquely identifying the content of a given cell or cell population, and subsequently analyzing the content of the cell and characterizing it as having derived from an individual cell or cell population, including analysis and characterization of nucleic acid(s) from the cell through sequencing.