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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Infinium Assay for Large-scale SNP Genotyping Applications
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Arrayed primer extension in the "array of arrays" format: a rational approach for microarray-based SNP genotyping.

Niels G F Klitø1, Qihua Tan, Mette Nyegaard

  • 1Department of Biochemistry, Pharmacology and Genetics, Human MicrroArray Centre, Odense University Hospital, Odense, DK-5000 Odense C, Denmark. niels.klitoe@mail.dk

Genetic Testing
|July 14, 2007
PubMed
Summary

This study introduces a cost-efficient genotyping method using arrayed primer extension (APEX) on an

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Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • High-throughput genotyping is crucial for genetic association studies.
  • Existing methods may lack cost-efficiency or scalability for large populations.
  • Understanding genetic variations in specific populations, like Danes, is important for disease linkage studies.

Purpose of the Study:

  • To develop and validate a cost-efficient, high-throughput genotyping system using an adapted arrayed primer extension (APEX) protocol.
  • To genotype multiple single nucleotide polymorphisms (SNPs) and individuals on a single microarray slide.
  • To assess the utility of the HapMap genotype resource for SNP panel design in European subpopulations.

Main Methods:

  • Adaptation of the arrayed primer extension (APEX) protocol to an 'array of arrays' platform.
  • Development of a novel instrumental setup for microarray processing.
  • Genotyping of 76 SNPs on chromosome 3q13.31 in 185 healthy Danish subjects.
  • Comparison of experimental Linkage Disequilibrium (LD) data with the international HapMap SNP database.

Main Results:

  • Successful implementation of a cost-efficient, high-throughput genotyping system.
  • Strong linear correlation observed between experimental LD results and HapMap data (R2(D') = 0.73, R2(r2) = 0.54).
  • Demonstration of the system's robustness for genotyping multiple SNPs and individuals simultaneously.

Conclusions:

  • The developed APEX protocol and instrumental setup are effective for high-throughput genotyping.
  • The HapMap genotype resource is valuable for designing SNP panels for gene mapping in European populations.
  • This approach supports rational, cost-efficient genetic studies in specific subpopulations.