New validation data for FoundationOne® Heme comprehensive genomic profiling assay

March 24, 2016 – CAMBRIDGE. Foundation Medicine, Inc. and Memorial Sloan Kettering Cancer Center (MSK) today announced the publication of new, seminal data validating FoundationOne® Heme - the fully informative comprehensive genomic profiling assay for hematologic malignancies developed as part of their collaboration - further supporting its integration into oncology clinical practice. The data, available online as a first edition and soon to be published in an upcoming issue of the journal Blood, demonstrate that FoundationOne Heme has proven highly accurate in detecting the types of genomic alterations known to impact diagnosis, therapy selection and prognosis in hematologic cancers. Importantly, the publication demonstrates the molecular information gleaned from comprehensive genomic profiling can be utilized to accurately match patients with an appropriate therapeutic approach.

“Foundation Medicine has an established track record of developing genomic profiling assays with the highest standards of analytical and clinical validation,” said Vincent Miller, M.D., chief medical officer, Foundation Medicine. “Publication of our validation data in this highly regarded, peer-reviewed journal supports the clinical significance of the FoundationOne Heme assay, in particular, for its ability to identify specific therapeutic targets, to help refine underlying diagnosis, and to improve prognostic and risk stratification of hematologic cancers.”

“The development of FoundationOne Heme represents a state-of-the-art genomics assay which can be used to profile patients with hematologic malignancies worldwide, which is a critical step in improving outcomes for all patients,” stated Ross Levine, M.D., a physician-scientist and the Laurence Joseph Dineen chair in leukemia research at MSK. “Our team’s expertise in hematologic malignancies and in translating genomics to the clinic has allowed us to partner with Foundation Medicine to bring this innovative genomic test to the patients we treat.”

Conventional diagnostic assays, including FISH and real-time PCR, are designed to identify a sub-set of genomic alterations, and in some cases, there are no assays that can reliably identify specific rearrangements. FoundationOne Heme, an integrated DNA/RNA platform using targeted hybrid-capture next-generation sequencing, is a proven and effective comprehensive genomic profile developed to detect all types of genomic alterations with therapeutic relevance, including single-nucleotide substitutions, insertions and deletions, copy number alterations and rearrangements, which are not fully evaluated using conventional diagnostic assays.

MSK and Foundation Medicine collaborated to develop FoundationOne Heme, which was commercially launched in 2013. The assay is performed using archived FFPE, blood or bone marrow samples with high accuracy in a clinically relevant timeframe in Foundation Medicine’s laboratory, which is certified by New York State and CLIA and is CAP accredited. FoundationOne Heme simultaneously detects all classes of genomic alterations in the DNA of 405 cancer-related genes and employs RNA sequencing across 265 genes to capture a broad range of gene fusions, a type of alteration that is a common driver of hematologic cancers. It is designed to provide physicians with clinically actionable information to guide treatment options for patients based on the genomic profile of their cancer.

Key Study Findings

Established analytic accuracy of detecting substitutions, insertions and deletions (indels) and copy number alterations (CNAs) by comparing the performance of the new assay with Foundation Medicine’s DNA-only assay that has previously undergone comprehensive validation across a large number of clinical samples. Compared to FoundationOne, FoundationOne Heme contains an additional 90 genes relevant to hematologic malignancies. Samples that were previously profiled with a validated test in which 169 alterations were identified in 55 genes common to both assays. The concordance between the two sets of results was 99.4%. Blinded comparisons were performed with CLIA-certified diagnostic assays, including Sequenom, RT-PCR, FISH and PCR fragment analysis, for 76 clinical specimens previously tested for 214 clinical relevant alterations in 11 genes that are known and routinely tested in clinical practice in AML, ALL and MDS. Overall concordance was 99% (211/214). In addition to the concordance analysis, genomic profiling of the 76 test samples identified 126 additional somatic alterations which are not covered by available hot spot assays in the given disease type, including clinically relevant genomic alterations in KRAS, TET2, EZH2, and DNMT3A. In independent low frequency variants ( < 10% mutant allele frequency), 20 of 21 variants were confirmed from AmpliSeq assay and another hotspot clinical assay. Combined DNA and RNA sequencing approach accurately detects a wide variety of genomic rearrangements and gene fusions with immediate clinical value in hematologic malignancies. Sensitivity for fusion detection at 20% or greater tumor fraction was 100% (161/161) and 98% (84/86) at 10% tumor fraction. Clinical experiences from 3,696 hematologic malignancies are summarized, with a high fraction of clinically relevant genomic alteration detected. At least one driver alteration was identified in 95% tumor specimens, and 77% cases harbored at least one alteration linked to a commercially available targeted therapy or one that is in clinical development. In addition, 61% of cases harbored at least one alteration with known prognostic relevance in that tumor type. Genomic rearrangements were detected from 37% of clinical hematologic malignancies; known and novel fusions in kinase drug targets are highlighted. In 16 cases of high-risk, BCR-ABL-negative B-ALL malignancies, known and novel clinical relevant genomic alterations were detected by FoundationOne Heme, and gene fusions involving JAK2, CRLF2 and EPOR were detected in 9 of 16 cases.

 

Source: Foundation Medicine, Inc.