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The MolecularMD MRDx BCR-ABL Test is an in vitro diagnostic test for the quantitative detection of BCR-ABL 1 transcripts (e13a2/b2a2 and/or e14a2/63a2) and the ABL1 endogenous control mRNA in peripheral blood specimens from patients previously diagnosed with t(9:22) positive chronic myeloid leukemia (CML). The ratio of BCR-ABL1 is calculated and reported on the WHO International Scale. The test utilizes quantitative, real-time reverse transcription polymerase chain reaction performed on the Applied Biosystems 7500 Fast Dx instrument. The MolecularMD MRDx BCR-ABL Test is intended to measure BCR-ABL mRNA transcript levels in patients diagnosed with t(9;22) positive CML during monitoring of treatment with Tyrosine Kinase Inhibitors (TKIs). The device is also intended to be used in the serial monitoring for BCR-ABL mRNA transcript levels as an aid in identifying CML patients in the chronic phase being treated with nilotinib who may be candidates for treatment discontinuation and for monitoring of treatment-free remission. The test does not differentiate between e13a2 or e14a2 fusion transcripts and does not monitor other rare fusion franscripts resulting from t(9:22). The test is not intended for the diagnosis of CML.

The MolecularMD MRDx® BCR-ABL Test is a quantitative, real-time polymerase chain reaction test that provides quantitation of BCR-ABL1 (hereafter BCR-ABL) transcript e13a2/b2a2 or e14a2/b3a2 and ABL1 (hereafter ABL) transcript levels in RNA extracted from peripheral blood samples collected from CML patients. Peripheral blood is collected in either EDTA or PAXgene Blood RNA Tubes. Each collection tube type requires a specified RNA extraction method and RNA input amount. Total RNA is extracted from peripheral blood and serves as the template for RT-qPCR. The test is performed using a onestep RT-qPCR protocol wherein the reverse transcription and quantitative, real-time PCR reactions are performed in the same well. BCR-ABL and ABL amplicons are generated and detected in real-time using TaqMan® MGB probes. The MolecularMD MRDx BCR-ABL Test is performed on the Applied Biosystems 7500 Fast Dx Real-Time PCR Instrument. The instrument integrates a thermal cycler, a fluorometer and application specific software. The ABI 7500 Fast Dx instrument software v1.4.1 calculates the BCR-ABL and ABL copy numbers using a standard curve generated with calibrators on each individual plate. The data are exported as a CSV file for further analysis in the MRDx® BCR-ABL Test Software. The BCR-ABL/ABL ratio is calculated and converted to the International Scale by the MRDx BCR-ABL Test Software. The MRDx BCR-ABL Test Software is used to analyze all test results. This software, provided with the MRDx BCR-ABL Test, is used to calculate the BCR-ABL/ABL % IS and MR value for patient sample using the conversion factor for the MRDx BCR-ABL Test after validating each MRDx BCR-ABL Test result against the run acceptance criteria and sample acceptance criteria.