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Related Concept Videos

Genetic Screens02:46

Genetic Screens

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.
Forward genetic screens
Forward or “classical” genetic screens involve creating random mutations in an organism’s DNA using radiation, mutagens, or insertion of additional bases, which result in visible changes...

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Related Experiment Video

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A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
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A microarray screen for novel candidate genes in coeliac disease pathogenesis.

B Diosdado1, M C Wapenaar, L Franke

  • 1Complex Genetics Group, Department of Biomedical Genetics, University Medical Centre, Utrecht, The Netherlands.

Gut
|June 15, 2004
PubMed
Summary

This study investigated gene expression in coeliac disease (CD) patients, revealing key genes involved in cell proliferation and differentiation. These findings suggest a failure in cell differentiation contributes to villous atrophy in CD, offering potential new therapeutic targets.

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Area of Science:

  • Gastroenterology and Immunology
  • Molecular Biology
  • Genomics

Background:

  • The molecular mechanisms driving coeliac disease (CD) pathogenesis remain largely unknown.
  • Understanding these pathways is crucial for developing effective treatments.

Purpose of the Study:

  • To identify novel genes and pathways involved in coeliac disease pathogenesis using gene expression profiling.
  • To investigate the impact of gluten exposure on gene expression in duodenal biopsies.

Main Methods:

  • Utilized cDNA microarrays to analyze gene expression in duodenal biopsies from 15 CD patients (Marsh III) and 7 controls (Marsh 0).
  • Compared gene expression profiles between CD patients on a gluten-free diet and those exposed to gluten.

Main Results:

  • Identified 109 differentially expressed genes (p<0.001) between CD patients and controls, many linked to proliferation and differentiation pathways.
  • Found 120 differentially expressed genes (p<0.005) when comparing gluten-exposed versus gluten-free conditions, supporting increased proliferation with gluten.
  • These alterations in proliferation and differentiation pathways may explain the characteristic villous atrophy in coeliac disease.

Conclusions:

  • Discovered novel candidate genes implicated in coeliac disease pathogenesis.
  • Hypothesize that villous atrophy in CD results from impaired cell differentiation.
  • Identified pathways not previously linked to CD, suggesting potential new therapeutic targets.