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Related Concept Videos

Genetic Lingo01:11

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Gene Therapy00:59

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Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be inserted. The...
Reporter Genes02:11

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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
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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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Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...

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Related Experiment Video

Updated: Jul 27, 2026

An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
10:17

An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations

Published on: November 3, 2010

Will the real disease gene please stand up?

Neil Shephard1, Sally John, Lon Cardon

  • 1Epidemiology Unit, University of Manchester, Manchester, UK. neil.shephard@man.ac.uk

BMC Genetics
|February 3, 2006
PubMed
Summary

Identifying complex disease genes requires careful analysis. Comprehensive genotyping in large, powered samples is most effective for distinguishing true genetic associations from false positives in linkage studies.

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Area of Science:

  • Genetics
  • Complex Disease Research
  • Statistical Genetics

Background:

  • Linkage studies for complex genetic diseases face challenges in selecting true positive signals.
  • Distinguishing true from false positive results requires robust analytical strategies.

Purpose of the Study:

  • To evaluate different analytical approaches for identifying true genetic associations in complex diseases.
  • To assess the performance of various methods in discerning real signals from noise in genetic studies.

Main Methods:

  • Utilized the Genetic Analysis Workshop 14 simulated dataset.
  • Compared haplotype analyses, multiple testing correction methods, and dataset replication.
  • Evaluated exhaustive genotyping in large, well-powered sample groups.

Main Results:

  • Haplotype analyses offered limited improvement over single-point analysis, potentially due to simulated low linkage disequilibrium.
  • Multiple testing correction methods were generally over-conservative.
  • Replication in secondary datasets led to follow-up of false positives.

Conclusions:

  • Comprehensive genotyping across all markers in large, adequately powered samples is the most effective strategy for complex disease gene discovery.
  • Careful validation is crucial to avoid pursuing false positive findings in genetic association studies.