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Published byChristina Doyle Modified over 6 years ago
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A DNA Real-Time Quantitative PCR Method Suitable for Routine Monitoring of Low Levels of Minimal Residual Disease in Chronic Myeloid Leukemia Paul A. Bartley, Susan Latham, Bradley Budgen, David M. Ross, Elizabeth Hughes, Susan Branford, Deborah White, Timothy P. Hughes, Alexander A. Morley The Journal of Molecular Diagnostics Volume 17, Issue 2, Pages (March 2015) DOI: /j.jmoldx Copyright © 2015 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions
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Figure 1 Comparison of minimal residual disease (MRD) measured by DNA real-time quantitative PCR (qPCR) and RT-qPCR. There were 193 samples in which MRD was detected by both RT-qPCR and DNA qPCR (closed circles), 50 samples in which MRD was detected only by DNA qPCR (open circles), no samples in which MRD was detected only by RT-qPCR, and eight samples in which MRD was not detected by either method. The Journal of Molecular Diagnostics , DOI: ( /j.jmoldx ) Copyright © 2015 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions
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Figure 2 Limit of detection (LOD) of quantitative RT-PCR (RT-qPCR). The percentage of samples detected was determined in a moving group of 15 samples and was taken to be the percentage detected at the median RT-qPCR value of the group. This percentage is related to the minimal residual disease (MRD) level measured by DNA qPCR on the same sample for which the median RT-qPCR had been determined. The dashed lines show the LOD, the value of which differs depending on the definition used. If LOD is the level at which 95% of positive samples are detected, which corresponds to three targets per assay, then the LOD of RT-qPCR is approximately 10−3.9. If LOD is the level at which one target is present, which corresponds to the level at which 63% of positive samples are detected, then the LOD of RT-qPCR is approximately 10−4.6. The Journal of Molecular Diagnostics , DOI: ( /j.jmoldx ) Copyright © 2015 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions
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