Tag Archives: CNV

VS-CNV Updates in VarSeq v2.2.3

         May 18, 2021

Golden Helix has just released VarSeq v2.2.3. In this update, there are notable changes that can improve CNV calling capabilities covered in this webcast. The topics discussed included: Accounting for GC content Improvements to CNV quality flags Using target filtering Updates to the CNV sensitivity and precision settings This blog post will elaborate on these capabilities and demonstrate how they… Read more »

Case Study – Hannover Medical School

         May 11, 2021
hannover

Dr. Auber is the team leader for the molecular genetic diagnosis of hereditary diseases at the Institute for Human Genetics at Hannover Medical School (MHH). MHH is one of the largest hospitals in northern Germany, with one of the largest outpatient clinics for individuals and families dealing with hereditary cancer and predisposition syndromes. Dr. Auber was in high school when… Read more »

VarSeq NGS Workflow Design: Clinical vs. Research

         April 22, 2021
NGS Clinical Research

In many cases, VarSeq users design their next-gen sequencing workflows for a clinical application. One of the major values of using VarSeq is the standardization of sample analysis via project templates for filtering down to rare variants and isolate any clinically relevant variant. However, VarSeq also doubles as a robust research application as well. There are specific algorithms that can… Read more »

Implementation of ClinGen Dosage Sensitivity in VSClinical

         March 4, 2021
Clin Gen CNV

The collaboration between the Clinical Genome Resource (ClinGen) consortium and the American College of Medical Genetics (ACMG) recently developed published guidelines for the interpretation of CNVs called on next-generation sequencing data. These new guidelines are the first to provide a robust set of rules for the interpretation of small intragenic deletions and duplications and are now automated in VSClinical.  … Read more »

Applying the Probability Segregation Algorithm for CNV Analysis

         February 4, 2021
Bioinformatics software

There is a multitude of interesting new features that have been incorporated into VarSeq 2.2.2. In this blog, I want to continue the discussion of these features and how each can be incorporated into your workflow, and also discuss the application of the Probability Segregation algorithm for copy number variation (CNV) analysis. The Probability Segregation algorithm is a new algorithm… Read more »

New Feature in VarSeq: Latest Sample Assessment Algorithm

         January 26, 2021

In continuation of our blog posts focusing on new features of VarSeq v2.2.2, here we will discuss the Latest Sample Assessment algorithm for both single nucleotide variants (SNVs) and copy number variants (CNVS). This algorithm annotates the variants of the project with the latest assessment from your variant catalog, which will show the history of interpretations made for the variants… Read more »

Webcast Recap: Evaluation of CNVs with VSClinical’s New ACMG Guideline Workflow

         November 10, 2020

In the webcast, Evaluation of Copy Number Variants with VSClinical’s New ACMG Guideline Workflow, we discussed how VSClinical implements Section 4 of the ACMG guidelines. Specifically, we focused on integrating literature and publications to assess the pathogenicity of a CNV event when there was a lack of dosage sensitivity information. One of the primary pieces of evidence for evaluating genes… Read more »

Upcoming VS-CNV Update: CNV Event Reporting with ACMG Guidelines

         October 22, 2020

Golden Helix is excited to release an upcoming VSClinical feature that allows users to analyze next-generation sequencing (NGS) CNV event reporting with ACMG guidelines. This feature will be the first in the NGS workspace to allow this capability and if you are curious about the functionalities you can get a sneak peek by looking at some of our most recent… Read more »

Advanced Plotting Capabilities with GenomeBrowse

         September 22, 2020

In this blog update, I’ll be walking you through some of the advanced plotting capabilities with GenomeBrowse. The strategy with any next-gen sequencing analysis is to filter down to interesting variants for either research or clinical conclusion. Golden Helix produces powerful software specifically tailored for this efficient and comprehensive search for interesting and clinically relevant variants. One additional advantage of… Read more »

Webcast Recap: VSClinical: First Commercial Product to Integrate the Updated ACMG Guidelines for CNVs

         September 15, 2020

In our recent webcast announcing the upcoming release of VarSeq VSClinical and the implementation of the ACMG guidelines for NGS CNVs, we had a number of live questions we didn’t get a chance to cover at the end of the presentation. I will follow up on those questions in this blog post. But first, if you didn’t get a chance to join us for… Read more »

Golden Helix’s NGS-Solutions for Clinical Variant Analysis: VSClinical’s Assessment Catalog

         August 14, 2020

It doesn’t take much effort to find articles discussing the value of Next-Generation Sequencing (NGS). There is a consistent tone amongst authors that implementing NGS pipelines are critical for clinical efficiency in both hereditary disorders and somatic. However, NGS strategies do not come without their own challenges. Challenges include not only the detection and calling of high quality/probability variants from… Read more »

VS-CNV; Golden Helix’s solution to replace traditional methods

         December 17, 2019

Copy Number Variation (CNV) is a type of structural variation in which sections of the genome are duplicated or deleted. Although CNV events are rare in the human population, constituting approximately 10% of the human genome, they are also associated with being causal mutations for disease phenotypes. Because of this, it is important for clinical and research settings to identify… Read more »

Copy Number Variants Using AMP Guidelines

         October 10, 2019

The common approaches to detecting copy number variants (CNVs) are chromosomal microarray and MLPA. However, both options increase analysis time, per sample costs, and are limited to the size of CNV events that can be detected. VarSeq’s CNV caller, on the other hand, allows users to detect CNVs from the coverage profile stored in the BAM file, which allows you… Read more »

Annotating and Cataloging CNVs in Varseq – Webcast Q&A

         October 25, 2018

We love when our viewers send questions in during the webcast but unfortunately we can’t answer all of them during the time allotted!  If you asked a question see below for answers, or if after viewing, you have any questions that weren’t asked, please feel free to send those over to support@goldenhelix.com. Does this work for FFPE derived DNA or ctDNA?… Read more »

CNV Setup & Quality Assessment: Part 1

         July 26, 2018
annotate

2017 was a busy year regarding the development of our CNV tools. Since the release of the CNV caller, we have produced quite a bit of content tailored to assist our users with getting started. Here are some links: Robarts Research Institute CNV analysis on patients with familial hypercholesterolemia CNV annotations Common CNV questions CNV calling with shallow whole genome… Read more »

Robarts Research Institute & VS-CNV

         January 5, 2018

One of our main focuses in 2017 was VS-CNV which allows clinicians to directly call CNVs in target regions quicker, easier and more affordably than CMA or MLPA testing. Our clients at Robarts Research Institute shared their recent publication with me which confirms that our time and dedication to our CNV capabilities was well worth it. I am delighted to… Read more »

Upcoming Webcast: Comprehensive Clinical Workflows for Copy Number Variants in VarSeq

         September 14, 2017
Tumor Sequencing

September 27, 2017 12:00 PM, EDT While Copy Number Variants are important to detect and interpret in many clinical genetic tests, labs have been without a comprehensive solution that integrates the annotating and reporting of high-quality CNV alongside their existing NGS variants. Golden Helix has developed and validated with our clinical partners a specialized NGS-based CNV caller capable of detecting… Read more »

Secondary Analysis 2.0 – Part V

         August 22, 2017
Detection of CNVs

An Example of an Integrated Clinical Workflow for CNVs and SNVs In this blog series, I discuss the architecture of a state of the art secondary pipeline that is able to detect single nucleotide variations (SNVs) and copy number variations (CNVs) in one test leveraging next-gen sequencing. In Part I, we reviewed genetic variation in humans and looked at the key… Read more »