Clinical Validation of Copy Number Variant Detection by Next-Gen Sequencing

About this webinar

Recorded On: Wednesday, April 24, 2019

Despite the great advances achieved in clinical genetics thanks to the incorporation of NGS (Next Generation Sequencing), a significant percentage of patients with diseases of genetic origin still do not have a conclusive molecular diagnosis. The incorporation of state-of-the-art bioinformatic methods has allowed the implementation of CNVs (Copy Number Variants) detection in NGS analysis, improving its diagnostic efficiency. In this study, the clinical utility of the detection of CNVs by NGS has been proven.

During 2018, 275 patients were studied using the NGS technique without obtaining an accurate genetic diagnosis. Bioinformatic tools that compare the normalized sequencing depth between patients and controls were used to determine CNVs. The results obtained were compared with patients own laboratory database and controls to rule out polymorphisms and false positives. All causal CNVs were confirmed by MLPA.

Pathogenic CNVs causing the disease were detected in 11 of the 275 patients (4%). Specifically, CNVs were detected for pathologies with autosomal dominant inheritance patterns (TSC2, MSH2, and FBN1), as well as for genes with autosomal recessive inheritance patterns, including two homozygous deletions (KCNV2 and RDX) and one heterozygous deletion with an SNV (Single Nucleotide Variant) in the PKHD1 gene. One of the most notable cases corresponds to a patient suspected of hypomagnesemia in which two deletions were identified in compound heterozygous mutation in the TRPM6 gene.

Watch on demand

Please enjoy this webcast recording. Should you have any questions about the content covered, please reach out to our team here.

Download the slide deck

To download a copy of the slides, click on the LinkedIn icon. This will redirect you to the SlideShare site. From there, you can clip your favorite slides or download the entire deck to your computer.

Love this webcast? Check out more!

Find out how Golden Helix software enables users to harness the full potential of genomics to identify the cause of disease, improve the efficacy and safety of drugs, develop genomic diagnostics, and advance the quest for personalized medicine.