Abstract 759: Analytical performance of a novel next generation sequencing assay for myeloid MRD

The detection of molecular measurable residual disease (MRD) for acute myeloid leukemia (AML) has shown promise as a prognostic for AML. To support clinical and translational research into potential strategies for MRD monitoring applications in the future, a next-generation sequencing (NGS) assay, the Oncomine Myeloid MRD Assay (RUO), was developed. This assay utilizes Unique Molecular Tags (UMT) and Ion AmpliSeq HD™ technology to detect ultra-low frequency genetic alterations from blood or bone marrow samples. The workflow includes manual AmpliSeq HD library construction, templating on Ion Chef™, and sequencing on Ion GeneStudio™ sequencers. The assay contains both DNA and RNA targeted panels to detect SNVs, indels, fusion markers, and microhaplotype. The DNA panel covers 1256 hotspots in 33 genes, including key mutations in NPM1, FLT3, DNMT3A and full gene coverage for CEBPA and TP53. The panel achieved a limit of detection (LOD) of 0.1% when tested on 27 reference genomic DNA samples and over 40 clinical research samples. The RNA panel detects 1003 fusion isoforms for 27 fusion driver genes, including BCR-ABL1, RUNX1, CBFB-MYH11, and KTM2A (MLL) partial tandem duplications (PTDs) and fusions. The assay also includes a Microhaplotyping panel to monitor chimerism. The workflow is analytically verified and includes an optimized analysis pipeline for sensitive and accurate MRD detection. Overall, this comprehensive Myeloid MRD (RUO) assay reliably identifies DNA mutations and fusions with high sensitivity and provides a new tool for myeloid MRD research. RUO: For Research Use Only. Not for use in diagnostic procedures. Citation Format: Hua Zhang, Xinzhan Peng, Guobin Luo, Annie Kraltcheva, David Mandelman, Michelle Swimley, Eli Pazol, Jose Espinoza, Scott Mitchell, Bo Ding, Ratnesh Singh, Doug Fenger, Na Li, Andrew Hatch, Vadim Mozhayskiy, Steven Roman, Sophie Rozenzhak. Analytical performance of a novel next generation sequencing assay for myeloid MRD [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 759.