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An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
Published on: November 3, 2010
Rapid determination of apolipoprotein E genotype using a heteroduplex generator
M K Bolla1, N Wood, S E Humphries
1Centre for Cardiovascular Genetics, Department of Medicine, Royal Free and University College Medical School, The Rayne Institute, 5 University Street, London, WC1E 6JJ, UK.
Journal of Lipid Research
|December 10, 1999
Summary
This study introduces a novel method for simultaneously identifying apolipoprotein E (apoE) gene polymorphisms. This faster, simpler genotyping technique aids in understanding links to Alzheimer's and coronary artery disease.
Area of Science:
- Genetics
- Molecular Biology
- Biochemistry
Background:
- Apolipoprotein E (apoE) gene polymorphisms are linked to coronary artery disease and Alzheimer's disease.
- Existing methods for apoE genotyping have limitations, including ambiguity and disadvantages.
- The three common apoE allelic isoforms (E2, E3, E4) are determined by amino acid variations at positions 112 and 158.
Purpose of the Study:
- To develop a simultaneous genotyping method for the two common apoE polymorphisms.
- To offer a simpler, faster, and more unequivocal genotyping technique compared to existing methods.
Main Methods:
- Polymerase Chain Reaction (PCR) amplification of the apoE region containing polymorphic sites.
- Hybridization of the PCR product with a Universal Heteroduplex Generator (UHG).
- Visualization of heteroduplex formation on a non-denaturing mini-gel using ethidium bromide staining.
Main Results:
- The described method allows for simultaneous identification of the two common apoE polymorphisms.
- The technique is capable of detecting other rare mutations within the amplified DNA region.
- Heteroduplex formation visualized on a gel provides unequivocal genotyping results.
Conclusions:
- This novel method offers a simpler and faster approach to apoE genotyping.
- The technique provides unambiguous results, overcoming limitations of previous methods.
- This method can be valuable for research and clinical applications involving apoE genotyping.
