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唇腭裂和小眼球-无眼-眼眶距过宽综合征患者的分子研究。

Molecular investigation in individuals with orofacial clefts and microphthalmia-anophthalmia-coloboma spectrum.

机构信息

Department of Translational Medicine, Area of Medical Genetics and Genomic Medicine, University of Campinas (UNICAMP), Campinas, SP, Brazil.

Human Molecular Genetics, de Duve Institute, Université Catholique de Louvain, Brussels, Belgium.

出版信息

Eur J Hum Genet. 2024 Oct;32(10):1257-1266. doi: 10.1038/s41431-023-01488-5. Epub 2023 Nov 6.


DOI:10.1038/s41431-023-01488-5
PMID:37932364
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11499658/
Abstract

This study describes genomic findings among individuals with both orofacial clefts (OC) and microphthalmia/anophthalmia/coloboma (MAC) recorded in the Brazilian Database on Craniofacial Anomalies (BDCA). Chromosomal microarray analysis (CMA) and Whole Exome Sequencing (WES) were performed in 17 individuals with OC-MAC. Clinical interpretation of molecular findings was based on data available at the BDCA and on re-examination. No copy number variants (CNVs) classified as likely pathogenic or pathogenic were detected by CMA. WES allowed a conclusive diagnosis in six individuals (35.29%), two of them with variants in the CHD7 gene, and the others with variants in the TFAP2A, POMT1, PTPN11, and TP63 genes with the following syndromes: CHARGE, CHD7-spectrum, Branchiooculofacial, POMT1-spectrum, LEOPARD, and ADULT. Variants of uncertain significance (VUS) possibly associated to the phenotypes were found in six other individuals. Among the individuals with VUSes, three individuals presented variants in genes associated to defects of cilia structure and/or function, including DYNC2H1, KIAA0586, WDR34, INTU, RPGRIP1L, KIF7, and LMNA. These results show that WES was the most effective molecular approach for OC-MAC in this cohort. This study also reinforces the genetic heterogeneity of OC-MAC, and the importance of genes related to ciliopathies in this phenotype.

摘要

本研究描述了在巴西颅面畸形数据库(BDCA)中记录的同时患有口面裂(OC)和小眼症/无眼症/眼眶裂(MAC)的个体的基因组发现。对 17 名 OC-MAC 患者进行了染色体微阵列分析(CMA)和全外显子组测序(WES)。分子发现的临床解释基于 BDCA 中的数据和重新检查。CMA 未检测到分类为可能致病性或致病性的拷贝数变异(CNVs)。WES 允许在六名个体(35.29%)中进行明确诊断,其中两名个体存在 CHD7 基因中的变异,其他个体存在 TFAP2A、POMT1、PTPN11 和 TP63 基因中的变异,伴有以下综合征:CHARGE、CHD7-谱、Branchiooculofacial、POMT1-谱、LEOPARD 和 ADULT。在其他六个个体中发现了可能与表型相关的意义不明的变异(VUS)。在 VUS 个体中,三名个体存在与纤毛结构和/或功能缺陷相关的基因中的变异,包括 DYNC2H1、KIAA0586、WDR34、INTU、RPGRIP1L、KIF7 和 LMNA。这些结果表明,在该队列中,WES 是 OC-MAC 最有效的分子方法。本研究还加强了 OC-MAC 的遗传异质性,以及与纤毛病相关的基因在这种表型中的重要性。

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引用本文的文献

[1]
Genetic testing for oral clefts: reflections based on a single Brazilian public genetics service.

Orphanet J Rare Dis. 2025-8-16

[2]
A decade of whole-exome sequencing in Brazilian Neurology: from past insights to future perspectives.

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[3]
Genomic testing in Low- and Middle-Income Countries (LMIC).

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本文引用的文献

[1]
Identification of novel susceptibility genes for non-syndromic cleft lip with or without cleft palate using NGS-based multigene panel testing.

Mol Genet Genomics. 2022-9

[2]
Exome sequencing identifies genetic variants in anophthalmia and microphthalmia.

Am J Med Genet A. 2022-8

[3]
Systematic use of phenotype evidence in clinical genetic testing reduces the frequency of variants of uncertain significance.

Am J Med Genet A. 2022-9

[4]
Interpretation and reporting of large regions of homozygosity and suspected consanguinity/uniparental disomy, 2021 revision: A technical standard of the American College of Medical Genetics and Genomics (ACMG).

Genet Med. 2022-2

[5]
Orofacial clefts embryology, classification, epidemiology, and genetics.

Mutat Res Rev Mutat Res. 2021

[6]
A Comprehensive Assessment of Co-occurring Birth Defects among Infants with Non-Syndromic Anophthalmia or Microphthalmia.

Ophthalmic Epidemiol. 2021-10

[7]
Brazil's Craniofacial Project: Different approaches on orofacial clefts and 22q11.2 deletion syndrome.

Am J Med Genet C Semin Med Genet. 2020-12

[8]
Non-syndromic anophthalmia/microphthalmia can be caused by a PORCN variant inherited in X-linked recessive manner.

Am J Med Genet A. 2021-1

[9]
Biallelic mutations in the gene cause a novel primary ciliopathy.

J Med Genet. 2021-8

[10]
Identification of genomic imbalances in oral clefts.

J Pediatr (Rio J). 2021

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