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An Ultrahigh-throughput Microfluidic Platform for Single-cell Genome Sequencing
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Single-cell genome sequencing at ultra-high-throughput with microfluidic droplet barcoding.

Freeman Lan1,2, Benjamin Demaree1,2, Noorsher Ahmed1

  • 1Department of Bioengineering and Therapeutic Sciences, California Institute for Quantitative Biosciences, University of California, San Francisco, California, USA.

Nature Biotechnology
|May 30, 2017
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Summary

We developed single-cell genomic sequencing (SiC-seq) to overcome challenges in analyzing large cell populations. This ultra-high-throughput method enables in-depth analysis of genetic heterogeneity in microbial communities.

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Area of Science:

  • Genomics
  • Microbiology
  • Bioinformatics

Background:

  • Analyzing genetic diversity in large cell populations is crucial but limited by technical challenges in single-cell isolation and genome preparation.
  • Existing methods struggle with throughput and scalability for comprehensive single-cell genome analysis.

Purpose of the Study:

  • To introduce single-cell genomic sequencing (SiC-seq), a novel method for ultra-high-throughput analysis of single-cell genomes.
  • To demonstrate the capability of SiC-seq in analyzing complex microbial communities and their genetic heterogeneity.

Main Methods:

  • SiC-seq utilizes droplet microfluidics for the isolation, fragmentation, and barcoding of single cells.
  • Genomes are sequenced using Illumina technology after pooling, enabling subsequent in silico sorting based on characteristic sequences.

Main Results:

  • Successfully sequenced over 50,000 cells per run from a synthetic microbial community containing bacteria and fungi.
  • Analyzed distributions of antibiotic-resistance genes, virulence factors, and phage sequences within an environmental microbial sample.
  • Demonstrated in silico sorting of sequenced genomes for targeted analysis.

Conclusions:

  • SiC-seq overcomes previous technical hurdles in single-cell genome sequencing of large populations.
  • This method provides a powerful tool for de-convoluting genetic heterogeneity in diverse cell populations.
  • Routine application of SiC-seq will advance our understanding of microbial community dynamics and genetic diversity.