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Clinical Chemistry 37: 241-244, 1991;
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Clinical Chemistry, Vol 37, 241-244, Copyright © 1991 by American Association for Clinical Chemistry

Analysis of apolipoprotein E genotypes by the Amplification Refractory Mutation System

PR Wenham, CR Newton and WH Price
Department of Clinical Chemistry, Western General Hospital, Edinburgh, U.K.

The Amplification Refractory Mutation System (ARMS) has been successfully applied to the detection of apolipoprotein (apo) E genotypes in human DNA extracted from peripheral blood. By using four allele-specific oligonucleotide primers and one common primer, one can identify the three common alleles of the apo E genetic polymorphism, epsilon 2, epsilon 3, and epsilon 4. The system amplifies two sequences of the apo E gene, one of 181 bp and the other 319 bp. These sequences are amplified when DNA containing a particular allele is incubated with its allele-specific oligonucleotide primer and a common primer. The method is simple, reliable, and nonisotopic and obviates the need for digestion with restriction endonucleases or for hybridization with allele-specific oligonucleotide probes. Genotyping DNA by this method overcomes the problem of post-translational modification of the apo E phenotype encountered with isoelectric focusing of the mature plasma apo E protein.




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Copyright © 1991 by the American Association for Clinical Chemistry.