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Updated: Mar 14, 2026
Rapid and Efficient Zebrafish Genotyping Using PCR with High-resolution Melt Analysis
Published on: February 5, 2014
Defining the performance parameters of a rapid screening tool for myotonic dystrophy type 1 based on triplet-primed
Mulias Lian1, Hai-Yang Law2,3, Caroline G Lee4,5,6
1a Khoo Teck Puat - National University Children's Medical Institute , National University Health System , Singapore , Singapore.
Background:
DMPK CTG-repeat expansions that cause myotonic dystrophy type 1 (DM1) can be detected more rapidly, cost-effectively, and simply by combining triplet-primed PCR (TP-PCR) with melting curve analysis (MCA). We undertook a detailed technical validation study to define the optimal operational parameters for performing bidirectional TP-PCR MCA assays.
Methods:
We determined the assays' analytic specificity and sensitivity, assessed the effect of reaction volumes, DNA diluents, and common contaminants on melt peak temperature, determined the assays' sensitivity in detecting low-level mosaicism for repeat expansion, and evaluated their performance on two real-time PCR platforms.
Results:
Both assays were highly specific and sensitive, and performed optimally under a broad range of parameters. Bidirectional TP-PCR MCA analysis also reduces the risk of generating false-negative results associated with the rare CCG-interruptions that may be present at either end of expanded alleles.
Conclusion:
The DMPK TP-PCR MCA is a highly specific, sensitive, and significantly cost-saving screening tool for DM1.
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