Methodology established for the detection of circulating tumor DNA by hybridization capture

Abstract

Roche's AVENIO ctDNA analysis kits and bioinformatics analysis (the AVENIO system) areaccessible to all NGS laboratories. We have developed an approach, namelythe Sec-Seq system, andcompared the accuracy, sensitivity, repeatability and economic cost between the AVENIO system and the Sec-Seq system. Both methods share the comparable accuracy and sensitivity in detecting the variant allele frequency of 0.0005, while the Sec-Seq system shows better accuracy in detecting the variant allele frequency of 0.001. Furthermore, the Sec-Seq system displaysa much better detection sensitivity than the AVENIO system. The Sec-Seq system has satisfactory performance in detecting the rare genetic variants in ctDNA with lower economic cost compared with the AVENIO system.