In this blog post, I will be analyzing a loss-of-function splice variant in MTHFR using VarSeq. In the search for clinically relevant variants contributing to rare disorders, efficient filtering strategies are an important step in eliminating disinteresting variants. However, any applied filters must also ensure no interesting variants inadvertently get filtered out. Golden Helix provides the tools to complete this… Read more »
Those of you who have been attending our recent webcasts have learned about our upcoming VarSeq release. A part of that release will be an additional algorithm that will annotate variants matching the current sample. If you are not familiar with these webcasts, here are several on-demand webcasts I recommend to get you familiar with these new features: Evaluating Copy… Read more »
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 »
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 »
Our previous webcast from VP Gabe Rudy in September exposed us to some fundamentals of this years’ updated Technical standards for the interpretation and reporting of constitutional copy-number variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics (ACMG) and the Clinical Genome Resource (ClinGen). This recent webcast was dedicated to breaking down these new guidelines… Read more »
A common discussion with our customers includes the challenges with the tertiary stage of analyzing next-gen sequencing data. This is the stage where all data from gene panels, exome, or whole genome scale pass through filters to quickly isolate the clinically relevant variant contributing to a patient disorder. Golden Helix has recognized these challenges in the scale of data and… Read more »
VSClinical is a feature to evaluate clinically relevant variants according to the ACMG or AMP guidelines. This feature can also be used to identify if a variant has been observed previously or evaluate a manually inserted variant. Take, for example, the scenario where a colleague is interested to see if you have seen any variants associated with Bechet syndrome, which… Read more »
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 »
The detection and interpretation of Copy Number Variants (CNVs) is vital for the clinical evaluation of individuals with a wide range of disorders. Golden Helix has remained at the forefront of CNVs in Next-Gen Sequencing (NGS) data since 2016 with the release of VS-CNV, our solution that allows you to both detect and analyze CNVs directly from NGS data. Earlier… Read more »
Golden Helix software provides huge analytic gain in handling large-scale genomic data. For example, a number of VarSeq users run cohort projects of whole genome level data processing hundreds of millions of variants at a time. However, many of our users are running gene panel level data for custom panels related to cancer (both hereditary and somatic), autism, cardiac, and… Read more »
It is common knowledge that variants can be germline or somatic depending on whether the variant was inherited or acquired after birth. A well-known example is cancer-causing mutations in the BRCA genes, wherein the mutation may or may not have been inherited. Understanding the origin of the cancer-causing mutation is important when assessing potential treatment options as well as identifying… Read more »
Our Support Team curates a variety of tutorials to help orient new users to the capabilities of VarSeq. We are happy to announce the team’s new release of the trio tutorial that places emphasis on using the ACMG guidelines. This tutorial gives insight into the proper setup of pedigree structure as well as detailed descriptions of the filter containers and… Read more »
Customizing VSClinical ACMG Guidelines Workflow Part 2 In the first part of this series, we covered how VarSeq provides customization of the clinical analysis workflow process. VSClinical’s various customization parameters within the ACMG Guidelines workflow includes the choice of how the internal knowledge base of previous variant interpretations are stored and what considerations go into this choice. In this blog, we… Read more »
Clinical labs offer a unique and sophisticated product that is performed repeatedly with high standards of quality. VarSeq was developed to provide labs with the customization required for clinical genetic tests in a repeatable workflow. On top of this, VSClinical offers additional parameters and choices that can be made when designing the test workflow. In this blog series, we will… Read more »
Our tutorials are a popular resource for prospective users. We have added a tutorial to help introduce customers to the ease and utility of the ACMG Guidelines incorporated in VSClinical. The ACMG Guidelines are a collection of 33 criteria that are used to determine a variant’s level of pathogenicity. VSClinical and VarSeq make it easy for users to sort and… Read more »
Huntington’s Disease (HD) Background Huntington’s Disease (HD) is an autosomal dominant neurodegenerative disease that is caused by a mutation in the huntingtin (HTT) gene resulting in 36 or more CAG trinucleotide repeats in exon 1. Individuals affected by HD experience motor disorders including involuntary movements and poor coordination, cognitive impairments showing a decline in thinking and reasoning and psychiatric disorders… Read more »
Congenital Myasthenic Syndromes (CMS) History: Congenital Myasthenic Syndromes (CMS) are a group of rare hereditary conditions that can cause seizures, severe muscle weakness, respiratory problems, and potentially disabling weaknesses shortly after birth or early childhood (1). CMS is the result of abnormalities in acetylcholine proteins residing in the motor endplate of the neuromuscular junction (1). These abnormalities can be diagnosed… Read more »
Hypertrophic Cardiomyopathy History It was December 9th, 1989, when one of Loyola Marymount’s strongest inside players, Hank Gathers, collapsed during the middle of a collegiate level basketball game against UC Santa Barbara. Measuring in at 6’7” and weighing 210 pounds, Gathers was diagnosed with exercise-induced ventricular tachycardia, or in layman’s terms, an abnormal heartbeat. Even with the concerning nature of… Read more »
Overview VSClinical enables users to evaluate variants according to the ACMG guidelines in a high-throughput fashion and obtain consistent results and accurate variant interpretations. This feature is tightly integrated into our VarSeq platform as well, and when paired together, users can evaluate NGS data and obtain clinical reports all in one suite. Coupled with the ability to find novel or… Read more »
Examples of Clinical Variant Interpretation with VSClinical In this chapter, I’d like to go through a few examples for variants that have been classified with the help of VSClinical. This will give you a better understanding of how data sources are actually being represented in the software and how those are used to make decisions on applicable criteria. It goes… Read more »
