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Parental origin of the supernumerary chromosome in trisomy 18


Ya-gang, Xie; Robinson, Wendy P; Spiegel, Roland; Binkert, Franz; Ruefenacht, Urszula; Schinzel, Albert (1993). Parental origin of the supernumerary chromosome in trisomy 18. Clinical Genetics, 44(2):57-61.

Abstract

The parental origin of an extra chromosome in Edwards syndrome has been investigated in 23 families by the combination of the VNTR probe pERT25, two microsatellite polymorphisms for D18S34 and D18S40, and several two-allele polymorphisms. Of the 23 cases, 22 were informative, with 17 (77%) being maternal and 5 (23%) paternal in origin. These results support the previous investigations, suggesting that trisomy 18 is predominantly of maternal origin, although a higher rate of paternally derived cases was observed than previously reported. A significant increase in maternal age was found to be associated with meiotic nondisjunction. Parental age was increased in both the maternally and paternally derived cases, but the size of the latter class was small and did not reach statistical significance.

Abstract

The parental origin of an extra chromosome in Edwards syndrome has been investigated in 23 families by the combination of the VNTR probe pERT25, two microsatellite polymorphisms for D18S34 and D18S40, and several two-allele polymorphisms. Of the 23 cases, 22 were informative, with 17 (77%) being maternal and 5 (23%) paternal in origin. These results support the previous investigations, suggesting that trisomy 18 is predominantly of maternal origin, although a higher rate of paternally derived cases was observed than previously reported. A significant increase in maternal age was found to be associated with meiotic nondisjunction. Parental age was increased in both the maternally and paternally derived cases, but the size of the latter class was small and did not reach statistical significance.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Medical Genetics
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Scopus Subject Areas:Life Sciences > Genetics
Health Sciences > Genetics (clinical)
Uncontrolled Keywords:Genetics (clinical), Genetics, chromosome 18, Edwards syndrome, heteromorphisms, parental origin, polymorphisms
Language:English
Date:August 1993
Deposited On:18 Apr 2023 12:25
Last Modified:29 Apr 2024 01:37
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:0009-9163
OA Status:Closed
Publisher DOI:https://doi.org/10.1111/j.1399-0004.1993.tb03847.x
PubMed ID:8275560
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