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C Vaux

Publications and source records attributed to C Vaux.

5 recordsLinked to original sources
PubMed1997

Prenatal diagnosis of Prader-Willi syndrome using PW71 methylation analysis--uniparental disomy and the significance of residual trisomy 15.

Chorionic villus sampling (CVS) was performed on a 38-year-old woman at 10 weeks' gestation for advanced maternal age. Two long-term cultures showed true mosaicism of cells with a normal karyotype and cells with trisomy 15. Follow-up amniocentesis showed only cells with a normal karyotype. Methylation analysis of amniocyte DNA using the probe PW71B showed a result consistent with a diagnosis of Prader-Willi syndrome. This result was confirmed using dinucleotide microsatellite polymorphism analysis, which showed that the fetus had maternal uniparental heterodisomy for chromosome 15. This report describes the use of methylation analysis for prenatal diagnosis of uniparental disomy 15 but also indicates that there is some doubt regarding the methylation status of all amniocyte samples, as one of nine controls showed hypomethylation. Fetal skin was found to show low-level mosaicism for trisomy 15, indicating a prolonged persistence of mosaic trisomy 15, which raises questions regarding the management of pregnancies found to be mosaic for trisomy 15.

Adult↗
PubMed1992

Evidence that Rieger syndrome maps to 4q25 or 4q27.

We report a baby with the features of Rieger syndrome and a de novo interstitial deletion of 4q which includes band 4q26 and an adjoining GTL light band, either q25 or q27. Rieger syndrome is provisionally mapped to 4q23----q27 but band 4q26 has been excluded as a possible site, suggesting that Rieger syndrome must map to a band, either 4q25 or 4q27, adjoining 4q26.

Anodontia↗