Key result
Triplet-primed PCR was more sensitive than Southern blotting-long PCR for the diagnosis of myotonic dystrophy type 1.
Why the study?
Is Triplet-Primed PCR more sensitive than Southern blotting-long PCR for the diagnosis of myotonic dystrophy type 1?
Observational (n=100)
Is Triplet-Primed PCR more sensitive than Southern blotting-long PCR for the diagnosis of myotonic dystrophy type 1?
Triplet-primed PCR is proposed as a more sensitive method for the molecular diagnosis of myotonic dystrophy type 1 compared to traditional Southern blotting-long PCR.
Triplet-primed PCR may increase DM1 diagnostic sensitivity; leaves open whether it should supplant Southern blotting in clinical use.
Genetic testing of myotonic dystrophy type 1 (DM1) is very important because it enables the diagnosis and indicates the severity of the disease. Mutation analysis is based on the detection of the number of CTG triplets in the 3' untranslated region of the myotonic dystrophy protein kinase (DMPK) gene. Sometimes it could be complicated by the presence of different patterns of repeat interruptions in the 5' and 3' ends of the expanded alleles recently described in about 3% to 5% of patients. To make molecular diagnosis easier and faster, the use of triplet-primed PCR (TP-PCR) for the detection of expansions in DM1 and other dynamic mutation diseases was proposed. Here we present the results of a retrospective study performed by TP-PCR on 100 subjects previously analyzed by Southern blotting-long PCR.
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Addis et al. (2012) conducted an observational in Myotonic Dystrophy Type 1 (n=100). Triplet-primed PCR (TP-PCR) vs. Southern blotting-long PCR was evaluated. Triplet-primed PCR was more sensitive than Southern blotting-long PCR for the diagnosis of myotonic dystrophy type 1.
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