Oligonucleotide Barcode Particles for Cell Analysis
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Solution Overview
Problem
Current methods for molecular barcoding, such as those using beads coupled to nucleic acid barcodes, face limitations in sensitivity and accuracy for cell analysis, particularly in deciphering gene expression profiles and determining cell states through techniques like reverse transcription, PCR amplification, and next-generation sequencing.
Innovation Solution
The development of synthetic particles comprising multiple oligonucleotide barcodes with identical cellular label sequences and different molecular label sequences, where each barcode has a target-binding region, allowing for improved target capturing and analysis in mixed cell populations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional bead-based molecular barcoding is used, then the basic target capturing function is achieved, but sensitivity and accuracy are insufficient
Solution Approach 1:
The patent divides the barcode into functional segments: a universal cellular label sequence (identical across all barcodes), variable molecular label sequences (different for each barcode), and target-binding regions. This segmentation allows the system to maintain consistent cell identification while enabling specific target recognition, thereby improving both sensitivity and accuracy without compromising reliability
Solution Approach 2:
Different portions of the oligonucleotide barcode have different functions and properties: the cellular label sequence provides universal cell identification, the molecular label sequence provides unique molecular identification, and the target-binding region provides specific target recognition. This local differentiation of function improves measurement precision while maintaining overall system reliability
2Measurement precision
If multiple oligonucleotide barcodes with different molecular label sequences are used, then target-specific binding is improved, but device complexity increases
Solution Approach 1:
The cellular label sequence serves as a universal element that is identical across all oligonucleotide barcodes, enabling consistent cell identification and serving as a common reference point. This universality simplifies the overall system by providing a shared foundation while allowing molecular label sequences to vary for specific target recognition, thus improving accuracy without proportionally increasing complexity
Solution Approach 2:
The patent uses a relatively small number of oligonucleotide barcodes (e.g., 10-100 barcodes per particle) with different molecular label sequences, which is sufficient for capturing diverse targets without requiring an exhaustive or overly complex barcode library. This partial action approach achieves adequate target identification accuracy while keeping the system manageable and not excessively complex
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
Enhances the sensitivity and accuracy of molecular barcoding by enabling the precise identification and quantification of targets in cell samples, improving the analysis of gene expression profiles and cell states.
Implementation Method 1
each of the first plurality of oligonucleotide barcodes comprises a target-binding region, and wherein each of the second plurality of oligonucleotide barcodes comprises a target-specific target-binding region
Data Source
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AI summary
Disclosed herein are methods, compositions, and kits for barcoding nucleic acids. For example, particles for barcoding are provided, where the particle comprises: a first plurality of oligonucleotide barcodes each comprising a target-binding region, and a second plurality of oligonucleotides each comprising a target-specific target-binding region.