Abstract
Myotonic dystrophy (DM) is an autosomal dominant neuromuscular disease with an estimated incidence of 1 in 8000 and is the most common form of muscular dystrophy affecting adults. An unstable, untranslated part of the myotonic dystrophy protein kinase gene on the long arm of chromosome 19, composed of CTG repeats, is a genetic marker for DM. We have developed a fast non-radioactive polymerase chain reaction (PCR) procedure to detect the (CTG)(n) repeat expansion in DM patients and their relatives. Genomic DNA extracted from peripheral blood lymphocytes was amplified by PCR using specific primers to flank the region containing the triplets. To improve the amplification of this CG-rich region, either 10% glycerol or rTth DNA polymerase XL (extra long) was added to the reaction mixture, allowing amplification of huge expansions otherwise not polymerized by PCR. The PCR products were Southern blotted and the expansion revealed using a fluorescein-labelled (CTG)10 probe. We compared our results with those obtained in 24 patients and relatives using genomic digestion followed by radioactive Southern blot; in all cases the results overlapped. The same technique was used for prenatal diagnosis in pregnant DM mothers. We conclude that this new method is reliable for the genetic testing of DM patients.
| Original language | English |
|---|---|
| Pages (from-to) | 289-293 |
| Number of pages | 5 |
| Journal | Journal of Neurology |
| Volume | 245 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1998 |
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Keywords
- CTG repeats
- Myotonic dystrophy
- Non-radioactive method
ASJC Scopus subject areas
- Clinical Neurology
- Neurology
Cite this
A new non-radioactive method for the screening and prenatal diagnosis of myotonic dystrophy patients. / Brugnoni, Raffaella; Morandi, Lucia; Brambati, Bruno; Briscioli, Vincenza; Cornelio, Ferdinando; Mantegazza, Renato.
In: Journal of Neurology, Vol. 245, No. 5, 1998, p. 289-293.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A new non-radioactive method for the screening and prenatal diagnosis of myotonic dystrophy patients
AU - Brugnoni, Raffaella
AU - Morandi, Lucia
AU - Brambati, Bruno
AU - Briscioli, Vincenza
AU - Cornelio, Ferdinando
AU - Mantegazza, Renato
PY - 1998
Y1 - 1998
N2 - Myotonic dystrophy (DM) is an autosomal dominant neuromuscular disease with an estimated incidence of 1 in 8000 and is the most common form of muscular dystrophy affecting adults. An unstable, untranslated part of the myotonic dystrophy protein kinase gene on the long arm of chromosome 19, composed of CTG repeats, is a genetic marker for DM. We have developed a fast non-radioactive polymerase chain reaction (PCR) procedure to detect the (CTG)(n) repeat expansion in DM patients and their relatives. Genomic DNA extracted from peripheral blood lymphocytes was amplified by PCR using specific primers to flank the region containing the triplets. To improve the amplification of this CG-rich region, either 10% glycerol or rTth DNA polymerase XL (extra long) was added to the reaction mixture, allowing amplification of huge expansions otherwise not polymerized by PCR. The PCR products were Southern blotted and the expansion revealed using a fluorescein-labelled (CTG)10 probe. We compared our results with those obtained in 24 patients and relatives using genomic digestion followed by radioactive Southern blot; in all cases the results overlapped. The same technique was used for prenatal diagnosis in pregnant DM mothers. We conclude that this new method is reliable for the genetic testing of DM patients.
AB - Myotonic dystrophy (DM) is an autosomal dominant neuromuscular disease with an estimated incidence of 1 in 8000 and is the most common form of muscular dystrophy affecting adults. An unstable, untranslated part of the myotonic dystrophy protein kinase gene on the long arm of chromosome 19, composed of CTG repeats, is a genetic marker for DM. We have developed a fast non-radioactive polymerase chain reaction (PCR) procedure to detect the (CTG)(n) repeat expansion in DM patients and their relatives. Genomic DNA extracted from peripheral blood lymphocytes was amplified by PCR using specific primers to flank the region containing the triplets. To improve the amplification of this CG-rich region, either 10% glycerol or rTth DNA polymerase XL (extra long) was added to the reaction mixture, allowing amplification of huge expansions otherwise not polymerized by PCR. The PCR products were Southern blotted and the expansion revealed using a fluorescein-labelled (CTG)10 probe. We compared our results with those obtained in 24 patients and relatives using genomic digestion followed by radioactive Southern blot; in all cases the results overlapped. The same technique was used for prenatal diagnosis in pregnant DM mothers. We conclude that this new method is reliable for the genetic testing of DM patients.
KW - CTG repeats
KW - Myotonic dystrophy
KW - Non-radioactive method
UR - http://www.scopus.com/inward/record.url?scp=0031972152&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031972152&partnerID=8YFLogxK
U2 - 10.1007/s004150050220
DO - 10.1007/s004150050220
M3 - Article
C2 - 9617710
AN - SCOPUS:0031972152
VL - 245
SP - 289
EP - 293
JO - Journal of Neurology
JF - Journal of Neurology
SN - 0340-5354
IS - 5
ER -