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Digital droplet multiple displacement amplification (ddMDA) for whole genome sequencing of limited DNA samples

Journal Article · · PLoS ONE
 [1];  [2];  [2];  [2];  [3]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States); Illumina, Inc., San Diego, CA (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)

Here, multiple displacement amplification (MDA) is a widely used technique for amplification of DNA from samples containing limited amounts of DNA (e.g., uncultivable microbes or clinical samples) before whole genome sequencing. Despite its advantages of high yield and fidelity, it suffers from high amplification bias and non-specific amplification when amplifying sub-nanogram of template DNA. Here, we present a microfluidic digital droplet MDA (ddMDA) technique where partitioning of the template DNA into thousands of sub-nanoliter droplets, each containing a small number of DNA fragments, greatly reduces the competition among DNA fragments for primers and polymerase thereby greatly reducing amplification bias. Consequently, the ddMDA approach enabled a more uniform coverage of amplification over the entire length of the genome, with significantly lower bias and non-specific amplification than conventional MDA. For a sample containing 0.1 pg/μL of E. coli DNA (equivalent of ~3/1000 of an E. coli genome per droplet), ddMDA achieves a 65-fold increase in coverage in de novo assembly, and more than 20-fold increase in specificity (percentage of reads mapping to E. coli) compared to the conventional tube MDA. ddMDA offers a powerful method useful for many applications including medical diagnostics, forensics, and environmental microbiology.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1266216
Alternate ID(s):
OSTI ID: 1303157
Journal Information:
PLoS ONE, Journal Name: PLoS ONE Journal Issue: 5 Vol. 11; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (14)

The study of atmospheric ice-nucleating particles via microfluidically generated droplets journal April 2018
Measurement of copy number variation in single cancer cells using rapid-emulsification digital droplet MDA journal June 2017
Massively parallel whole genome amplification for single-cell sequencing using droplet microfluidics journal July 2017
Precision oncology using a limited number of cells: optimization of whole genome amplification products for sequencing applications journal July 2017
Evaluation of bias induced by viral enrichment and random amplification protocols in metagenomic surveys of saliva DNA viruses journal June 2018
Obtaining Genome Sequences of Mutualistic Bacteria in Single Microcystis Colonies journal October 2019
Recent Advances in Droplet-based Microfluidic Technologies for Biochemistry and Molecular Biology journal June 2019
Single‐Cell Analysis Using Droplet Microfluidics journal November 2019
Droplet microfluidics for high-sensitivity and high-throughput detection and screening of disease biomarkers
  • Kaushik, Aniruddha M.; Hsieh, Kuangwen; Wang, Tza-Huei
  • Wiley Interdisciplinary Reviews: Nanomedicine and Nanobiotechnology, Vol. 10, Issue 6 https://doi.org/10.1002/wnan.1522
journal May 2018
Building a lineage from single cells: genetic techniques for cell lineage tracking journal January 2017
Obtaining high-quality draft genomes from uncultured microbes by cleaning and co-assembly of single-cell amplified genomes journal February 2018
The Development of an Effective Bacterial Single-Cell Lysis Method Suitable for Whole Genome Amplification in Microfluidic Platforms text January 2018
The Development of an Effective Bacterial Single-Cell Lysis Method Suitable for Whole Genome Amplification in Microfluidic Platforms journal July 2018
The study of atmospheric ice-nucleating particles via microfluidically generated droplets text January 2018

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