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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
Genotyping single nucleotide polymorphisms by multiplex minisequencing using tag-arrays
Lili Milani1, Ann-Christine Syvänen
1Uppsala University, Uppsala, Sweden.
Methods in Molecular Biology (Clifton, N.J.)
|April 22, 2009
Summary
This study introduces a flexible microarray system for highly multiplexed single nucleotide polymorphism (SNP) genotyping. The method uses minisequencing and offers parallel analysis for custom SNP selection.
Area of Science:
- Molecular Biology
- Genetics
- Bioinformatics
Background:
- Multiplexed single nucleotide polymorphism (SNP) genotyping is crucial for genetic research.
- Existing methods face limitations in scalability and customization for SNP analysis.
Purpose of the Study:
- To develop a flexible and highly multiplexed system for SNP genotyping.
- To combine minisequencing with microarray technology for parallel SNP analysis.
Main Methods:
- Utilized cyclic minisequencing with fluorescently labeled dideoxynucleotides (ddNTPs).
- Employed multiplex PCR products and custom-designed detection primers with unique Tag-sequences.
- Immobilized complementary Tag-sequences (cTags) on a microarray for detection.
- Implemented an "array of arrays" format using a silicon rubber grid for sample compartmentalization.
Main Results:
- The system allows for highly multiplexed and parallel analysis of custom selected SNPs.
- Demonstrated the ability to analyze 80 or 16 samples for up to 200 or 600 SNPs per slide.
- Genotypes were deduced by cluster analysis of incorporated fluorescent labels after primer hybridization.
Conclusions:
- The developed system provides a flexible and efficient solution for high-throughput SNP genotyping.
- This approach enables customized and parallel analysis of a large number of SNPs across multiple samples.
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