Journal
NATURE BIOTECHNOLOGY
Volume 39, Issue 10, Pages 1220-+Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41587-021-00900-z
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Funding
- Lustgarten Foundation for Pancreatic Cancer Research
- Marcus Foundation
- Virginia and D.K. Ludwig Fund for Cancer Research
- Conrad N. Hilton Foundation
- John Templeton Foundation
- Medical Research Future Fund Investigator Grant [APP1194970]
- National Institutes of Health [T32 GM007309, U01 CA230691-01, P50 CA228991, U01 CA200469, R37 CA230400-01, U01 CA152753]
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The SaferSeqS method efficiently detects low-frequency mutations by introducing identical molecular barcodes and enriching target sequences with strand-specific PCR, achieving high sensitivity and specificity, and detecting variants at frequencies below 1 in 100,000 DNA template molecules with a background mutation rate of <5 x 10(-7) mutants per base pair (bp).
Mutations present at a low frequency in a sample are detected with high sensitivity and a low error rate. Identification and quantification of low-frequency mutations remain challenging despite improvements in the baseline error rate of next-generation sequencing technologies. Here, we describe a method, termed SaferSeqS, that addresses these challenges by (1) efficiently introducing identical molecular barcodes in the Watson and Crick strands of template molecules and (2) enriching target sequences with strand-specific PCR. The method achieves high sensitivity and specificity and detects variants at frequencies below 1 in 100,000 DNA template molecules with a background mutation rate of <5 x 10(-7) mutants per base pair (bp). We demonstrate that it can evaluate mutations in a single amplicon or simultaneously in multiple amplicons, assess limited quantities of cell-free DNA with high recovery of both strands and reduce the error rate of existing PCR-based molecular barcoding approaches by >100-fold.
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