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Rapid detection of expansions by PCR and non‐radioactive hybridization: application for prenatal diagnosis of myotonic dystrophy
Author(s) -
Zühlke Christine,
Atici Jassemien,
Martorell Loreto,
Gembruch Ulrich,
Kohl Martina,
Göpel Wolfgang,
Schwinger Eberhard
Publication year - 2000
Publication title -
prenatal diagnosis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.956
H-Index - 97
eISSN - 1097-0223
pISSN - 0197-3851
DOI - 10.1002/(sici)1097-0223(200001)20:1<66::aid-pd745>3.0.co;2-h
Subject(s) - myotonic dystrophy , amniocentesis , chorionic villus sampling , prenatal diagnosis , myotonia , genetics , trinucleotide repeat expansion , biology , medicine , fetus , allele , gene , microbiology and biotechnology , pregnancy
The mutation specific for myotonic dystrophy (DM) is an unstable expanded CTG repeat located in the 3′‐untranslated region of the myotonin protein kinase gene. Expansion of the CTG repeat shows a positive correlation with the severity of the disease and increases in successive generations of DM patients. Children with the congenital form of DM show the most severe phenotype and have large expansions, usually >1000 repeats. For pregnant women with DM, prenatal diagnosis of DM may be offered. To reduce the time between chorionic villus sampling or amniocentesis and final results of DNA analysis in these cases, a fast and efficient method has been developed. This method combines direct PCR analyses for normal alleles with a nested PCR system followed by non‐radioactive hybridization with a single‐stranded probe. Copyright © 2000 John Wiley & Sons, Ltd.