Viral Genome Sequencing via Microfluidic Encapsulation
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Solution Overview
Problem
Current methods for genomic sequencing of viruses are not well-suited to detect genomic variation among viral particles in a sample and are prone to biases, particularly in environmental samples, and are limited in their ability to recover small or RNA viruses and complex samples.
Innovation Solution
The method involves encapsulating individual genetic elements in semi-permeable microcapsules, amplifying the genetic material within these capsules, and sequencing the amplified material, which includes steps like cryopreservation, enrichment for extracellular genetic elements, and barcoding to improve the detection and quantification of viral genomes in various sample types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If bulk extraction and sequencing of viral nucleic acids is used, then sequencing coverage is achieved, but genomic variation among individual viral particles cannot be detected
Solution Approach 1:
The bulk sample is segmented into individual viral particles through microfluidic encapsulation, where each viral particle is isolated in a separate droplet or microcapsule. This segmentation enables individual genomic sequencing while maintaining high-throughput capability, resolving the contradiction between detecting genomic variation and method complexity.
2Reliability
If metagenome assembly is used, then viral genomes can be recovered, but genomes from complex samples and environmental samples remain unrecoverable
Solution Approach 1:
The method performs preliminary enrichment and isolation of individual viral particles before sequencing through microfluidic encapsulation. This preliminary action separates viral particles from complex environmental matrices, enabling reliable genome recovery from complex and environmental samples that would otherwise be unrecoverable by bulk metagenome assembly.
3Measurement precision
If FACS-based genomics is used, then individual viral particles can be analyzed, but small viruses and RNA viruses are limited
Solution Approach 1:
The microfluidic encapsulation platform provides universal applicability across different virus types including small viruses and RNA viruses. The system uses size-independent encapsulation mechanisms and compatible lysis/amplification protocols that work across diverse viral genomes, eliminating the limitations of FACS-based methods while maintaining individual particle analysis capability.
4Productivity
If bulk sequencing is used, then sequencing throughput is maintained, but biases are introduced particularly in environmental samples
Solution Approach 1:
By segmenting the bulk sample into individual viral particle encapsulations, the method eliminates bulk extraction biases while maintaining high-throughput sequencing capability. Each individual particle is processed separately through lysis and amplification, ensuring unbiased representation of environmental viral diversity while preserving sequencing productivity 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 enables the recovery of viral genomes that cannot be detected using previous methods, particularly from complex samples like sediments and environmental samples, and provides more accurate and complete genomic sequences, improving the detection of viral load and evolution monitoring.
Implementation Method 1
encapsulating aliquots of a liquid sample in semi-permeable microcapsules to generate a plurality of encapsulated aliquots
Implementation Method 2
exposing the plurality of encapsulated aliquots to amplification conditions to amplify genomic material within the encapsulated aliquots
Data Source
AI summary
Described herein are methods of sequencing individual viral genomes and methods of determining the viral load of a sample. Also disclosed herein are methods of monitoring the evolution of a viral genome.