Korean J Lab Med.  2008 Oct;28(5):386-391. 10.3343/kjlm.2008.28.5.386.

Evaluation of Multiplex PCR Assay Using Dual Priming Oligonucleotide System for Detection Mutation in the Duchenne Muscular Dystrophy Gene

Affiliations
  • 1Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea. KAL1119@yuhs.ac

Abstract

BACKGROUND: Exon deletions of Duchenne muscular dystrophy (DMD) gene account for most of the alterations found in DMD and Becker muscular dystrophy (BMD). This study was to evaluate the usefulness of dual priming oligonucleotide multiplex PCR (DPO PCR) in detection of exon deletions of DMD gene.
METHODS
Thirty-seven DMD or BMD patients who had known exon deletions detected by conventional multiplex PCR (conventional PCR) and nine control subjects were enrolled in this study. When a discrepancy was shown between the results of conventional PCR and DPO PCR, the multiplex ligation-dependent probe amplification (MLPA) technique was performed as a confirmation test.
RESULTS
The same deletions previously identified by conventional PCR in 32 out of 37 subjects were also detected by DPO PCR. For the five subjects (13.5%) showing discrepant results between the conventional PCR and DPO PCR, MLPA was performed and its results were found to correlate better with those of DPO PCR. The discrepancies were due to false positive or false negative results of the conventional PCR.
CONCLUSIONS
DPO PCR shows a high agreement of results with the conventional PCR and is considered an adequate method to be used as a primary genetic test for the diagnosis of DMD. Because of an improved accuracy, especially for determining the boundaries of DMD gene deletions, DPO PCR can be very useful as a supplement to the conventional PCR.

Keyword

DMD gene; Deletion; Multiplex PCR; Dual priming oligonucleotide PCR; Multiplex ligation-dependent probe amplification

MeSH Terms

*DNA Mutational Analysis
DNA Primers
Dystrophin/*genetics
Female
Gene Deletion
Genetic Screening
Humans
Male
Muscular Dystrophy, Duchenne/*diagnosis/genetics
Nucleic Acid Amplification Techniques
Oligonucleotide Probes
Polymerase Chain Reaction/*methods
Reagent Kits, Diagnostic
Reproducibility of Results

Figure

  • Fig. 1. Multiplex ligation-dependent probe amplification (MLPA), conventional-multiplex PCR, and dual priming oligonucleotide (DPO) multiplex PCR of case 34. (A) Deletion of exons 48 and 49 of the DMD gene (arrows) in MLPA. (B) Deletion of exon 49 in lane 2 and presence of exon 48 band in lane 1 of conventional-multiplex PCR. (C) Deletion of exon 48 in group 3 DPO multiplex PCR. M, the 100-bp-size marker.


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