Prenatal diagnosis of collagen disorders by direct biochemical analysis of chorionic villus biopsies.

Details

Serval ID
serval:BIB_D5340602F78E
Type
Article: article from journal or magazin.
Publication sub-type
Case report (case report): feedback on an observation with a short commentary.
Collection
Publications
Title
Prenatal diagnosis of collagen disorders by direct biochemical analysis of chorionic villus biopsies.
Journal
Pediatric Research
Author(s)
Raghunath M., Steinmann B., Delozier-Blanchet C., Extermann P., Superti-Furga A.
ISSN
0031-3998 (Print)
ISSN-L
0031-3998
Publication state
Published
Issued date
1994
Volume
36
Number
4
Pages
441-448
Language
english
Notes
Publication types: Case Reports ; Clinical Trial ; Comparative Study ; Controlled Clinical Trial ; Journal Article ; Research Support, Non-U.S. Gov't
Abstract
We have developed a method for early prenatal diagnosis of molecular disorders of collagens I and III. The method takes advantage of the fact that isolated chorionic villi contain significant amounts of collagens in their extracellular matrix (stroma) and that they synthesize collagens in vitro. After metabolic labeling of chorion villus biopsies in toto with radioactive amino acids, collagens are extracted and analyzed by SDS-PAGE. Direct staining of the gel shows collagens synthesized in vivo, whereas autoradiofluorography identifies collagens synthesized during incubation in vitro. Unlike collagens synthesized by cultured amniotic fluid cells, collagens extracted from chorionic villi are not overmodified and thus allow better identification of molecular defects. Results are available within 3 to 5 d after biopsy. Using this method, we have correctly excluded Ehlers-Danlos syndrome type IV in two pregnancies, Ehlers-Danlos syndrome type VII in one pregnancy, and lethal osteogenesis imperfecta in four pregnancies. In addition, we correctly predicted a healthy fetus and an embryo affected with lethal osteogenesis imperfecta in consecutive pregnancies from a couple in which the asymptomatic mother was a somatic mosaic for a COL1A1 G-to-A transition (Gly355Asp). Direct collagen analysis of chorion villus biopsies labeled in toto is rapid and reliable and may become the method of choice for the prenatal diagnosis of selected collagen disorders.
Keywords
Adult, Chorionic Villi Sampling, Collagen/genetics, Collagen/isolation & purification, Collagen Diseases/diagnosis, Collagen Diseases/embryology, Electrophoresis, Polyacrylamide Gel, Female, Humans, Infant, Newborn, Point Mutation, Pregnancy, Reference Values, Ultrasonography, Prenatal
Pubmed
Web of science
Create date
14/03/2011 16:14
Last modification date
20/08/2019 15:55
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