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Published in: BMC Pediatrics 1/2018

Open Access 01-12-2018 | Research article

Clinical and genetic study of 20 patients from China with Cornelia de Lange syndrome

Authors: Mingyan Hei, Xiangyu Gao, Lingqian Wu

Published in: BMC Pediatrics | Issue 1/2018

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Abstract

Background

Cornelia de Lange syndrome (CdLS) is a rare congenital syndrome with no racial difference. The objective of this study is to report the clinical characteristics and genetic study of 20 CdLS cases from China.

Methods

This is an observational study. Suspected patients were referred for further confirmation, clinical treatment, and genetic testing under voluntary condition. Demographic data and family history, data of clinical manifestations including facial dysmorphism and developmental delay of each patient were collected. Chromosomal analysis and NIPBL/SMC1A/SMC3 gene mutational analysis were carried out by PCR, reverse transcription PCR direct sequencing in the probands, and SNP array to detect the genome-wide copy number variations.

Results

Twenty CdLS cases from China were included in this study. Facial dysmorphisms, feeding difficulties, and developmental delay were the major clinical manifestations. Seven patients underwent gene mutation tests. Both the SMC1A and SMC3 gene mutation tests were negative in all. A heterozygous mutation in exon 20 of the NIPBL gene in proband 2, and a heterozygous mutation in intron 38 of the NIPBL gene in proband 3 were found in 1 patient, and RT-PCR revealed a splicing mutation in exon 38, generating both normal transcript and an aberrant alternatively spliced transcript with exon 38 deletion.

Conclusions

Clinical manifestations of CdLS patients from China are similar to those in the other countries. Heterozygous mutations of NIPBL gene were found.
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Metadata
Title
Clinical and genetic study of 20 patients from China with Cornelia de Lange syndrome
Authors
Mingyan Hei
Xiangyu Gao
Lingqian Wu
Publication date
01-12-2018
Publisher
BioMed Central
Published in
BMC Pediatrics / Issue 1/2018
Electronic ISSN: 1471-2431
DOI
https://doi.org/10.1186/s12887-018-1004-3

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