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Memorial Sloan Kettering (MSKCC) Single Cell Mutational Profiling in Myeloid Malignancies

Myeloid malignancies have previously been characterized by large scale bulk molecular profiling studies on patient samples. These studies, while clinically informative, are unable to delineate mutation order as well as clonal architecture and complexity. To investigate the clonal framework of myeloid malignancies, the Single Cell Mutational Profiling in Myeloid Malignancies study was designed. This study performed sequencing of 148 samples from 117 adult patients diagnosed with clonal hematopoiesis (n = 21), myeloproliferative neoplasms (MPN; n = 14), and acute myeloid leukemia (AML; n = 82) between 20 and 87 years of age. Sequencing of all samples was performed using the Tapestri single cell DNA sequencing platform from Mission Bio, Inc. The platform utilizes a custom amplicon panel covering 109 amplicons across 31 genes frequently mutated in myeloid malignancies (CH, MPN, AML). Using the single cell DNA sequencing data, we were capable of elucidating clonal architecture and clonal complexity in each sample. In a subset of samples, we also performed simultaneous single cell DNA sequencing and cell surface protein expression analysis using the Tapestri DNA + Protein platform. This study allowed us to determine the expression of 7 cell surface proteins (CD3, CD11b, CD19, CD34, CD38, CD45RA, and CD90) at single cell resolution. We performed DNA+ Protein sequencing on samples from CH patients (n = 7) as well as AML patients (n = 17).