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Related Concept Videos

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Genome-wide Association Studies-GWAS

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
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The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
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Related Experiment Video

Updated: Mar 3, 2026

A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia
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[Exome sequencing for syndrome diagnostics].

Elsebet Østergaard1, Lotte Risom, Jakob Ek

  • 1elsebet.ostergaard@dadlnet.dk.

Ugeskrift for Laeger
|May 6, 2017
PubMed
Summary

Whole exome sequencing significantly improves genetic diagnosis for rare congenital disorders, reaching over 50% diagnostic rates. This method is now a key tool in clinical diagnostics, addressing limitations of standard genetic workups.

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Area of Science:

  • Genetics
  • Genomics
  • Clinical Diagnostics

Background:

  • Most rare congenital disorders have a genetic origin.
  • Standard diagnostic methods achieve only a 50% diagnostic rate for these conditions.
  • Advanced sequencing technologies offer improved diagnostic potential.

Purpose of the Study:

  • To present the current status of whole exome sequencing (WES) in clinical diagnostics.
  • To review the methods, results, and ethical considerations of WES.
  • To highlight the impact of WES on diagnosing rare genetic syndromes.

Main Methods:

  • Whole exome sequencing (WES) implementation in clinical diagnostics.
  • Review of WES methodologies and data analysis.
  • Examination of diagnostic yield and clinical utility.

Main Results:

  • WES has enhanced the genetic diagnosis of rare syndromes.
  • The article discusses the current diagnostic capabilities and limitations of WES.
  • Ethical aspects, including incidental findings, are addressed.

Conclusions:

  • Whole exome sequencing is a powerful tool for diagnosing rare congenital disorders.
  • WES has improved diagnostic rates beyond traditional methods.
  • Ongoing evaluation of WES methods and ethical implications is crucial for clinical integration.