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Related Concept Videos

Genome-wide Association Studies-GWAS01:11

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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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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
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Related Experiment Video

Updated: May 28, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
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Is DEXI a Multiple Sclerosis Susceptibility Gene?

Anna M Eriksson1,2, Nora Emini3, Hanne F Harbo1,4

  • 1Institute of Clinical Medicine, University of Oslo, Kirkeveien 166, 0450 Oslo, Norway.

International Journal of Molecular Sciences
|February 13, 2025
PubMed
Summary

Genetic studies reveal over 200 variants linked to multiple sclerosis (MS) risk. This review focuses on the DEXI gene, a key player in MS autoimmunity and progression, highlighting its role in immune cell function.

Keywords:
CLEC16ADEXIautoimmunitymultiple sclerosissusceptibility genes

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Area of Science:

  • Immunogenetics
  • Neuroimmunology
  • Genetics of Autoimmune Diseases

Background:

  • Multiple sclerosis (MS) genetic studies have identified numerous susceptibility loci, primarily involving immune system genes.
  • Genome-wide association studies (GWASs) have revealed complex genetic contributions to MS, affecting both innate and adaptive immunity.
  • Recent research distinguishes genetic factors influencing MS onset from those affecting disease progression.

Purpose of the Study:

  • To review the molecular and functional characteristics of the DEXI gene in autoimmunity.
  • To highlight recent advances in understanding DEXI's role in multiple sclerosis.
  • To emphasize the clinical translation potential of MS genetic discoveries.

Main Methods:

  • Review of existing genetic association studies, including GWASs.
  • Analysis of molecular and functional data related to the DEXI gene.
  • Exploration of the link between CLEC16A variants and DEXI gene expression.

Main Results:

  • Over 200 genetic variants associated with MS risk have been identified.
  • The CLEC16A gene is consistently linked to increased risk for MS and other autoimmune disorders.
  • Genetic variants in CLEC16A act as expression quantitative trait loci for DEXI, implicating DEXI in MS susceptibility.

Conclusions:

  • DEXI is a significant MS susceptibility gene, contributing to the understanding of MS pathogenesis.
  • Continued molecular investigation of MS genetic loci is crucial for clinical applications.
  • Understanding DEXI's role in autoimmunity may lead to novel therapeutic strategies for MS.