Abstract LB-315: Oncology research applications on an electrical impedance based, high accuracy sequencing platform

Abstract Next Generation Sequencing (NGS) technologies have revolutionized basic biological and clinical research, especially in oncology. NGS cancer assays are used to determine cancer predisposition, identify tumor mutations, monitor treatment response and develop personalized therapies. Here, GenapSys presents a scalable, low cost, and high accuracy sequencing platform based on electrical impedance detection. We demonstrate that a single run with a 16M sensor chip generates up to 2 Gb of data, with greater than 99% raw accuracy and an average read length of about 150 bp. We highlight its applications for oncology research, using diverse cancer panels on reference and clinical samples. We tested hybrid-capture and multiplex PCR-based cancer panels on a range of DNA sources, including oncology reference standards derived from cell line DNA, cfDNA standards, as well as clinical samples: FFPE, fresh frozen tumor tissue, and blood. For hybrid-capture libraries, we used the IDT xGen Pan Cancer 1.5 and Exome Research panels. We detected low frequency mutations in the range of 1%-24.5% across multiple reference standards with the cancer panel, and observed high correlation in allele frequency with expected values (R2 > 0.99). Similar results were obtained with an amplicon panel, the Ion AmpliSeq Cancer Hotspot Panel v2. Whole exome sequencing and pan cancer sequencing of clinical FFPE, fresh frozen and blood samples showed high concordance (F1-score > 95%) of SNV mutation calling with commonly used NGS technology. Thus, we demonstrate that the GenapSys Sequencing Platform is an accurate, scalable, and low cost solution for oncology research on a wide range of sample types and NGS assays. Citation Format: Saurabh Paliwal, Mohammad Fallahi, Ali Nabi, Tyson A. Clark, Bin Dong, Srijeeta Bagchi, Maryam Jouzi, Hannah Ritchie, Lydia Bonar, Anthony Thomas, Narin Tangprasertchai, Meysam R. Barmi, Xavier Gomes, Subra Sankar, Hesaam Esfandyarpour. Oncology research applications on an electrical impedance based, high accuracy sequencing platform [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr LB-315.