Use of FFPE-derived DNA in next generation sequencing: DNA extraction methods

PLoS One. 2019 Apr 11;14(4):e0211400. doi: 10.1371/journal.pone.0211400. eCollection 2019.

Abstract

Archival tissues represent a rich resource for clinical genomic studies, particularly when coupled with comprehensive medical records. Use of these in next generation sequencing (NGS) is a priority. Nine formalin-fixed paraffin-embedded (FFPE) DNA extraction methods were evaluated using twelve FFPE samples of varying tissue types. Quality assessment included total yield, percent dsDNA, fragment analysis and multiplex PCR. After assessment, three tissue types from four FFPE DNA methods were selected for NGS downstream evaluation, targeted and whole exome sequencing. In addition, two low input library protocols were evaluated for WES. Analysis revealed average coverage across the target regions for WES was ~20-30X for all four FFPE DNA extraction methods. For the targeted panels, the highest molecular tag coverage was obtained with the Kingfisher FFPE extraction method. The genotype concordance was 99% for the commonly called variant positions between all four extraction methods with the targeted PCR NGS panel and 96% with WES. Assessing quality of extracted DNA aids in selecting the optimal NGS approach, and the choice of both DNA extraction and library preparation approaches can impact the performance of archival tissue in NGS.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • DNA / chemistry
  • DNA / genetics
  • DNA / isolation & purification*
  • Exome Sequencing
  • Formaldehyde / chemistry*
  • Gene Library
  • High-Throughput Nucleotide Sequencing
  • Humans
  • Multiplex Polymerase Chain Reaction
  • Paraffin Embedding
  • Specimen Handling / methods*
  • Tissue Fixation / methods

Substances

  • Formaldehyde
  • DNA

Grants and funding

This work was supported by the Mayo Clinic Center for Individualized Medicine. The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.