Familial Non-syndromic Conotruncal Defects Are Not Associated with a 22q11 Microdeletion

Overview

Journal Hum Genet

Specialty Genetics

Date 1996 Feb 1

PMID 8566942

Citations 13

Authors

S Debrus

G Berger

A de Meeus

U Sauer

S Guillaumont

M Voisin

A Bozio

S Demczuk

A Aurias

P Bouvagnet

Affiliations

Soon will be listed here.

Abstract

Molecular studies have shown microdeletions in region q11 of chromosome 22 in nearly all patients with DiGeorge, velocardiofacial and conotruncal anomaly face syndromes (DGS, VCFS and CTAFS, respectively) and in a high percentage of non-syndromic familial cases of conotruncal defects (CTD). CTD account for roughly a fourth to a third of all non-syndromic congenital heart defects (CHD), thus, 22q11 could harbor a major genetic factor of CHD. We searched for a 22q11 microdeletion in familial cases of non-syndromic CTD. Thirty-six cases of various isolated CTD, that is without history of hypocalcemia, immune deficiency, absent thymus, and dysmorphic appearance, were selected. With 48F8, a cosmid probe localized in the smallest deleted region of the DiGeorge critical region (DGCR), we found no deletions by fluorescence in situ hybridization in these 36 affected individuals of 16 families with recurrent CTD. Moreover, D22S264, a microsatellite localized at the distal part of the largest deleted region, was used to genotype the patients. Thirty-two patients out of 37 were heterozygous and hence not deleted at this locus, whereas 5 were uninformative. In conclusion, there are no large deletions in familial cases of various CTD, whether these defects are identical or not within a family. This result does not rule out other minor anomalies in this chromosomal region.

Citing Articles

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Genetic variation in folate metabolism is associated with the risk of conotruncal heart defects in a Chinese population.

Wang X, Wei H, Tian Y, Wu Y, Luo L BMC Pediatr. 2018; 18(1):287.

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Quantitative proteomic analysis of serum from pregnant women carrying a fetus with conotruncal heart defect using isobaric tags for relative and absolute quantitation (iTRAQ) labeling.

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Clinical manifestations of Deletion 22q11.2 syndrome (DiGeorge/Velo-Cardio-Facial syndrome).

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Investigating 22q11.2 deletion and other chromosomal aberrations in fetuses with heart defects detected by prenatal echocardiography.

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PMID: 20848279 DOI: 10.1007/s00246-010-9763-0.

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