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The stochastic nature of errors in next-generation sequencing of circulating cell-free DNA

Author

Listed:
  • David A Nix
  • Sabine Hellwig
  • Christopher Conley
  • Alun Thomas
  • Carrie L Fuertes
  • Cindy L Hamil
  • Preetida J Bhetariya
  • Ignacio Garrido-Laguna
  • Gabor T Marth
  • Mary P Bronner
  • Hunter R Underhill

Abstract

Challenges with distinguishing circulating tumor DNA (ctDNA) from next-generation sequencing (NGS) artifacts limits variant searches to established solid tumor mutations. Here we show early and random PCR errors are a principal source of NGS noise that persist despite duplex molecular barcoding, removal of artifacts due to clonal hematopoiesis of indeterminate potential, and suppression of patterned errors. We also demonstrate sample duplicates are necessary to eliminate the stochastic noise associated with NGS. Integration of sample duplicates into NGS analytics may broaden ctDNA applications by removing NGS-related errors that confound identification of true very low frequency variants during searches for ctDNA without a priori knowledge of specific mutations to target.

Suggested Citation

  • David A Nix & Sabine Hellwig & Christopher Conley & Alun Thomas & Carrie L Fuertes & Cindy L Hamil & Preetida J Bhetariya & Ignacio Garrido-Laguna & Gabor T Marth & Mary P Bronner & Hunter R Underhill, 2020. "The stochastic nature of errors in next-generation sequencing of circulating cell-free DNA," PLOS ONE, Public Library of Science, vol. 15(2), pages 1-16, February.
    • Handle: RePEc:plo:pone00:0229063
    DOI: 10.1371/journal.pone.0229063
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