Simultaneous allele-specific amplification: A strategy using modified primer-template mismatches for SNP detection[mdash ]Application to prothrombin 20210A (factor II) and factor V Leiden (1691A) gene mutations

Background: Inherited thrombophilia is caused by mutations in genes central to the clotting cascade. Analysis of the factor V Leiden (FVL) and prothrombin G20210A mutations are the most prevalent in thrombophilia. Methods and Results: We have optimized an allele-specific PCR assay for the simultaneo...

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Bibliographic Details
Published in:Molecular diagnosis 2001-09, Vol.6 (3), p.201-209
Main Authors: DelRio-LaFreniere, Susie A., McGlennen, Ronald C.
Format: Article
Language:English
Subjects:
Alleles
Base Pair Mismatch - genetics
DNA Mutational Analysis
DNA Primers - chemistry
Factor V - genetics
Gene Amplification
Humans
Mutation
Polymerase Chain Reaction
Polymorphism, Single Nucleotide - genetics
Prothrombin - genetics
Restriction Mapping
Thrombophilia - diagnosis
Thrombophilia - genetics
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Summary:Background: Inherited thrombophilia is caused by mutations in genes central to the clotting cascade. Analysis of the factor V Leiden (FVL) and prothrombin G20210A mutations are the most prevalent in thrombophilia. Methods and Results: We have optimized an allele-specific PCR assay for the simultaneous detection of both wild-type and mutant alleles. This method is adapted for clinical use with the FVL and prothrombin G20210A assays and is significant in its intentional use of nucleotide mismatches at the 3` end of allele-specific primers. Two internal allele-specific primers are designed to amplify in opposite directions on opposite strands that reduce differential amplification. Our results show concordance with methods involving PCR with restriction endonuclease digestion, yet are simpler to perform. Conclusion: The simultaneous allele-specific amplification method allows simultaneous detection of wild-type and mutant alleles by PCR using four distinct primers. Nucleotide mismatches in the primers reduce competitive amplification.
ISSN:1084-8592
1532-8619
DOI:10.1054/modi.2001.26049