Next-generation sequencing (NGS) effectively detects both del/dup events and sequence alterations, and has a number of advantages over traditional techniques. Intended for genetic counselors, physicians, and other healthcare providers, this presentation will help you to:
Dr. Vatta is a clinical molecular geneticist with more than 20 years of experience in cardiovascular genetic research and 10 years in cardiovascular genetic diagnostics. Before joining Invitae, Dr. Vatta was the Director of the Cardiovascular Genetics Section at the Indiana University Molecular Genetics Diagnostic Laboratory in the Division of Diagnostic Genomics and Associate Professor of Clinical Medical and Molecular Genetics at Indiana University. There, he led the development and launch of next-generation sequencing analysis for clinical testing. Dr. Vatta received his Ph.D. in molecular genetics from the Scuola Internazionale Superiore di Studi Avanzati/International School of Advanced Studies (SISSA/ISAS) in Trieste, Italy, with a thesis on the “Molecular Genetic Approach to the Study of Dilated Cardiomyopathy."
Compared to traditional approaches, next-generation sequencing (NGS) can simultaneously reduce the cost and increase the breadth of DNA assays, thus helping to make clinical genetic testing more accessible and more comprehensive. NGS was first introduced in 2005, and while it initially had limited performance and uses, continuous innovation has delivered robust NGS platforms that are widely accepted for clinical use.
NGS is most often used to detect relatively small DNA sequence alterations; however, NGS-based methods to detect larger deletions and duplications (del/dup events) were first published in 2009. Like NGS generally, these methods have evolved rapidly, and the most recent versions allow appropriately equipped laboratories to deliver high-quality results for both small and large DNA alterations from a single NGS assay.
In this seminar, we will briefly review approaches used for del/dup calling using NGS. We will focus on clinical data from our laboratory, which shows high concordance between our NGS-based approach and traditional del/dup test results. We also will illustrate cases in which the combination of NGS-based sequence and del/dup analysis resolves complex events that can be challenging for traditional approaches.