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de Koning MA, Pimienta Ramirez PA, Haak MC, Han X, Ruiterkamp-Versteeg MH, de Leeuw N, Schatz UA, Shoukier M, Rieger-Fackeldey E, Ortiz JU, van Duinen SG, Klein WM, Witlox RSGM, Finnell RH, Santen GWE, Lei Y, Suerink M. De novo heterozygous missense variants in CELSR1 as cause of fetal pleural effusions and progressive fetal hydrops. J Med Genet 2024; 61:549-552. [PMID: 38272662 DOI: 10.1136/jmg-2023-109698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Accepted: 01/10/2024] [Indexed: 01/27/2024]
Abstract
Fetal hydrops as detected by prenatal ultrasound usually carries a poor prognosis depending on the underlying aetiology. We describe the prenatal and postnatal clinical course of two unrelated female probands in whom de novo heterozygous missense variants in the planar cell polarity gene CELSR1 were detected using exome sequencing. Using several in vitro assays, we show that the CELSR1 p.(Cys1318Tyr) variant disrupted the subcellular localisation, affected cell-cell junction, impaired planar cell polarity signalling and lowered proliferation rate. These observations suggest that deleterious rare CELSR1 variants could be a possible cause of fetal hydrops.
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Affiliation(s)
- Maayke A de Koning
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Monique C Haak
- Department of Obstetrics, Leiden University Medical Center, Leiden, The Netherlands
| | - Xiao Han
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA
| | | | - Nicole de Leeuw
- Department of Human Genetics, Radboudumc, Nijmegen, The Netherlands
| | - Ulrich A Schatz
- Institute of Human Genetics, Technische Universität München, Munich, Germany
- Department of Obstetrics and Gynecology, Technische Universität München, Munich, Germany
| | - Moneef Shoukier
- Department of Molecular Genetics, Prenatal Medicine Munich, Munich, Germany
| | | | - Javier U Ortiz
- Department of Obstetrics and Gynecology, Technische Universität München, Munich, Germany
| | - Sjoerd G van Duinen
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
| | - Willemijn M Klein
- Department of Medical Imaging, Radboudumc, Nijmegen, The Netherlands
| | - Ruben S G M Witlox
- Department of Neonatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Richard H Finnell
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA
- Departments of Medicine, Molecular and Cellular Biology and Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Gijs W E Santen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Yunping Lei
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA
| | - Manon Suerink
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
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Xie Y, Wang H, Hu B, Zhang X, Liu A, Cai C, Li S, Chen C, Wang Z, Yin Z, Wang M. Dendritic Spine in Autism Genetics: Whole-Exome Sequencing Identifying De Novo Variant of CTTNBP2 in a Quad Family Affected by Autism Spectrum Disorder. CHILDREN (BASEL, SWITZERLAND) 2022; 10:children10010080. [PMID: 36670631 PMCID: PMC9856540 DOI: 10.3390/children10010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/05/2022] [Accepted: 12/24/2022] [Indexed: 01/03/2023]
Abstract
Autism spectrum disorder (ASD) affects around 1% of children with no effective blood test or cure. Recent studies have suggested that these are neurological disorders with a strong genetic basis and that they are associated with the abnormal formation of dendritic spines. Chromosome microarray (CMA) together with high-throughput sequencing technology has been used as a powerful tool to identify new candidate genes for ASD. In the present study, CMA was first used to scan for genome-wide copy number variants in a proband, and no clinically significant copy number variants were found. Whole-exome sequencing (WES) was used further for genetic testing of the whole quad family affected by ASD, including the proband, his non-autistic sister, and his parents. Sanger sequencing and MassARRAY-based validation were used to identify and confirm variants associated with ASD. WES yielded a 151-fold coverage depth for each sample. A total of 98.65% of the targeted whole-exome region was covered at >20-fold depth. A de novo variant in CTTNBP2, p.M115T, was identified. The CTTNBP2 gene belongs to a family of ankyrin repeat domain-containing proteins associated with dendritic spine formation. Although CTTNBP2 has been associated with ASD, limited studies have been developed to identify clinically relevant de novo mutations of CTTNBP2 in children with ASD; family-based WES successfully identified a clinically relevant mutation in the CTTNBP2 gene in a quad family affected by ASD. Considering the neuron-specific expression of CTTNBP2 and its role in dendritic spine formation, our results suggest a correlation between the CTTNBP2 mutation and ASD, providing genetic evidence for ASD spine pathology. Although the present study is currently insufficient to support the assertion that the de novo mutation M115T in CTTNBP2 directly causes the autism phenotype, our study provides support for the assertion that this mutation is a candidate clinically relevant variant in autism.
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Affiliation(s)
- Yingmei Xie
- Division of Neonatology, Longgang District Maternal and Child Health Hospital, Shenzhen 518172, China
| | - Hui Wang
- Division of Child Health Care, Xiamen Branch of Children’s Hospital of Fudan University (Xiamen Children’s Hospital), Xiamen 361006, China
| | - Bing Hu
- Division of Neonatology, Longgang District Maternal and Child Health Hospital, Shenzhen 518172, China
| | - Xueli Zhang
- Division of Neonatology, Shenzhen Longhua People’s Hospital, Shenzhen 518109, China
| | - Aiping Liu
- The Department of Laboratory, Baoan Public Health Service Center of Shenzhen, Shenzhen 518108, China
| | - Chunquan Cai
- Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, Tianjin Children’s Hospital (Children’s Hospital of Tianjin University), Tianjin Pediatric Research Institute, Tianjin 300134, China
| | - Shijun Li
- First Medical Center, Chinese PLA General Hospital, Department of Radiology, Beijing 100853, China
| | - Cheng Chen
- Division of Neonatology, Longgang District Maternal and Child Health Hospital, Shenzhen 518172, China
| | - Zhangxing Wang
- Division of Neonatology, Shenzhen Longhua People’s Hospital, Shenzhen 518109, China
| | - Zhaoqing Yin
- The People’s Hospital of Dehong Autonomous Prefecture, Division of Pediatrics, Dehong Hospital of Kun-ming Medical University, Mangshi 678400, China
- Correspondence: (Z.Y.); (M.W.)
| | - Mingbang Wang
- Microbiome Therapy Center, South China Hospital, Medical School, Shenzhen University, Shenzhen 518116, China
- Shanghai Key Laboratory of Birth Defects, Division of Neonatology, Children’s Hospital of Fudan University, National Center for Children’s Health, Shanghai 201102, China
- Correspondence: (Z.Y.); (M.W.)
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