Genomic Precision

 A SeraCare blog focused on precision medicine and advanced clinical diagnostics

Three liquid biopsy problems solved by the most patient-like ctDNA reference materials

SeraCare’s new Seraseq™ Circulating Tumor Reference Materials

Posted by Dale Yuzuki on Jul 24, 2017 10:00:00 AM

Clinical genomics laboratories are increasingly looking to liquid biopsy cancer assays to complement their current solid tumor assays. Compared to their solid tumor assay counterparts, circulating tumor DNA (ctDNA) assays offer a different set of challenges to consider for clinical labs.  One of the most important of which, is to develop a set of reagents that are appropriately validated to determine the critical performance of the assay across many parameters.  The ctDNA targets of liquid biopsy assays are typically at much lower allelic frequencies and require a robust and reproducibly designed assay to consistently detect these important variants.

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Topics: Circulating Tumor DNA, ctDNA, Reference Material, DNA, patient-like, cell free DNA, cfDNA, DNA Blend

Multiplexed Reference Materials as Controls for Cardiomyopathy Diagnostic Next-Generation Sequencing

A Journal for Molecular Diagnostics article describing ‘an attractive addition to the repertoire of materials for the development, validation, and quality monitoring of clinical NGS assays’

Posted by Dale Yuzuki on Dec 13, 2016 11:01:00 AM

Hypertrophic Cardiomyopathy (HCM) is a disease where the heart muscle is enlarged and a significant cause of sudden cardiac death, and is frequently asymptomatic.  HCM is commonly caused by a mutation in one of nine heart muscle genes that comprise the sarcomere, and occurs at a prevalence of about 1 in 500 in the general population. HCM is the leading cause of cardiac death in young athletes in the United States.

Clinical genetic testing for mutations in the HCM-related genes has been ongoing for over a decade;  the GeneTest.org database reveals 105 laboratories offering some version of genetic testing.  While knowledge of prevalent pathogenic variants are available, the majority of variants remain private (that is, unpublished and not widely available). The move to NGS-based gene panels for HCM testing has lead to new challenges for test development, validation and routine quality control due to the inherent scarcity of samples, the cost of including numerous single mutations from these individual samples, and the lack of these materials for laboratories without a long history of testing.

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Topics: NGS assays, next gen sequencing, allele frequencies, Controls, Cardiomyopathy, DNA, Clinical Genetic Testing, multiplexed referenence materials, multiplexing

 
 

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