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de Masfrand S, Cogné B, Nizon M, Deb W, Goldenberg A, Lecoquierre F, Nicolas G, Bournez M, Vitobello A, Mau-Them FT, le Guyader G, Bilan F, Bauer P, Zweier C, Piard J, Pasquier L, Bézieau S, Gerard B, Faivre L, Saugier-Veber P, Piton A, Isidor B. Penetrance, variable expressivity and monogenic neurodevelopmental disorders. Eur J Med Genet 2024; 69:104932. [PMID: 38453051 DOI: 10.1016/j.ejmg.2024.104932] [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: 08/31/2023] [Revised: 03/01/2024] [Accepted: 03/02/2024] [Indexed: 03/09/2024]
Abstract
PURPOSE Incomplete penetrance is observed for most monogenic diseases. However, for neurodevelopmental disorders, the interpretation of single and multi-nucleotide variants (SNV/MNVs) is usually based on the paradigm of complete penetrance. METHOD From 2020 to 2022, we proposed a collaboration study with the French molecular diagnosis for intellectual disability network. The aim was to recruit families for whom the index case, diagnosed with a neurodevelopmental disorder, was carrying a pathogenic or likely pathogenic variant for an OMIM morbid gene and inherited from an asymptomatic parent. Grandparents were analyzed when available for segregation study. RESULTS We identified 12 patients affected by a monogenic neurodevelopmental disorder caused by likely pathogenic or pathogenic variant (SNV/MNV) inherited from an asymptomatic parent. These genes were usually associated with de novo variants. The patients carried different variants (1 splice-site variant, 4 nonsense and 7 frameshift) in 11 genes: CAMTA1, MBD5, KMT2C, KMT2E, ZMIZ1, MN1, NDUFB11, CUL3, MED13, ARID2 and RERE. Grandparents have been tested in 6 families, and each time the variant was confirmed de novo in the healthy carrier parent. CONCLUSION Incomplete penetrance for SNV and MNV in neurodevelopmental disorders might be more frequent than previously thought. This point is crucial to consider for interpretation of variants, family investigation, genetic counseling, and prenatal diagnosis. Molecular mechanisms underlying this incomplete penetrance still need to be identified.
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Affiliation(s)
- Servane de Masfrand
- Nantes Université, CHU Nantes, Service de Génétique Médicale, 44000, Nantes, France.
| | - Benjamin Cogné
- Nantes Université, CHU Nantes, Service de Génétique Médicale, 44000, Nantes, France; Nantes Université, CHU Nantes, CNRS, INSERM, L'institut Du Thorax, 44000 Nantes, France
| | - Mathilde Nizon
- Nantes Université, CHU Nantes, Service de Génétique Médicale, 44000, Nantes, France; Nantes Université, CHU Nantes, CNRS, INSERM, L'institut Du Thorax, 44000 Nantes, France
| | - Wallid Deb
- Nantes Université, CHU Nantes, Service de Génétique Médicale, 44000, Nantes, France; Nantes Université, CHU Nantes, CNRS, INSERM, L'institut Du Thorax, 44000 Nantes, France
| | - Alice Goldenberg
- CHU Rouen, Service de Génétique et Centre de Référence pour Les Troubles Du Développement, 76183, Rouen, France
| | - François Lecoquierre
- CHU Rouen, Service de Génétique et Centre de Référence pour Les Troubles Du Développement, 76183, Rouen, France
| | - Gaël Nicolas
- CHU Rouen, Service de Génétique et Centre de Référence pour Les Troubles Du Développement, 76183, Rouen, France
| | - Marie Bournez
- Centre de Référence Anomalies Du Développement et Syndromes Malformatifs, FHU TRANSLAD, CHU Dijon, 21000, Dijon, France
| | - Antonio Vitobello
- Unité Fonctionnelle Innovation en Diagnostic Génomique des Maladies Rares, CHU Dijon Bourgogne, Dijon, France; Génétique des Anomalies Du Développement, INSERM 123, Université de Bourgogne, Dijon, France
| | - Frédéric Tran Mau-Them
- Unité Fonctionnelle Innovation en Diagnostic Génomique des Maladies Rares, CHU Dijon Bourgogne, Dijon, France; Génétique des Anomalies Du Développement, INSERM 123, Université de Bourgogne, Dijon, France
| | - Gwenaël le Guyader
- Service de Génétique Clinique, Centre de Compétence Maladies Rares Anomalies Du Développement, CHU de Poitiers, Poitiers, France
| | - Frédéric Bilan
- Service de Génétique Clinique, Centre de Compétence Maladies Rares Anomalies Du Développement, CHU de Poitiers, Poitiers, France
| | | | | | - Juliette Piard
- Centre de Génétique Humaine and Integrative and Cognitive Neuroscience Research Unit EA481, Université de Franche-Comté, Besançon, France
| | | | - Stéphane Bézieau
- Nantes Université, CHU Nantes, Service de Génétique Médicale, 44000, Nantes, France; Nantes Université, CHU Nantes, CNRS, INSERM, L'institut Du Thorax, 44000 Nantes, France
| | - Bénédicte Gerard
- Laboratoire de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Laurence Faivre
- Centre de Référence Anomalies Du Développement et Syndromes Malformatifs, FHU TRANSLAD, CHU Dijon, 21000, Dijon, France; Génétique des Anomalies Du Développement, INSERM 123, Université de Bourgogne, Dijon, France
| | - Pascale Saugier-Veber
- CHU Rouen, Service de Génétique et Centre de Référence pour Les Troubles Du Développement, 76183, Rouen, France
| | - Amélie Piton
- Laboratoire de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Bertrand Isidor
- Nantes Université, CHU Nantes, Service de Génétique Médicale, 44000, Nantes, France; Nantes Université, CHU Nantes, CNRS, INSERM, L'institut Du Thorax, 44000 Nantes, France.
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K. C. R, Patel NR, Shenoy A, Scallan JP, Chiang MY, Galazo MJ, Meadows SM. Zmiz1 is a novel regulator of lymphatic endothelial cell gene expression and function. PLoS One 2024; 19:e0302926. [PMID: 38718095 PMCID: PMC11078365 DOI: 10.1371/journal.pone.0302926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
Zinc Finger MIZ-Type Containing 1 (Zmiz1), also known as ZIMP10 or RAI17, is a transcription cofactor and member of the Protein Inhibitor of Activated STAT (PIAS) family of proteins. Zmiz1 is critical for a variety of biological processes including vascular development. However, its role in the lymphatic vasculature is unknown. In this study, we utilized human dermal lymphatic endothelial cells (HDLECs) and an inducible, lymphatic endothelial cell (LEC)-specific Zmiz1 knockout mouse model to investigate the role of Zmiz1 in LECs. Transcriptional profiling of ZMIZ1-deficient HDLECs revealed downregulation of genes crucial for lymphatic vessel development. Additionally, our findings demonstrated that loss of Zmiz1 results in reduced expression of proliferation and migration genes in HDLECs and reduced proliferation and migration in vitro. We also presented evidence that Zmiz1 regulates Prox1 expression in vitro and in vivo by modulating chromatin accessibility at Prox1 regulatory regions. Furthermore, we observed that loss of Zmiz1 in mesenteric lymphatic vessels significantly reduced valve density. Collectively, our results highlight a novel role of Zmiz1 in LECs and as a transcriptional regulator of Prox1, shedding light on a previously unknown regulatory factor in lymphatic vascular biology.
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Affiliation(s)
- Rajan K. C.
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - Nehal R. Patel
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - Anoushka Shenoy
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
| | - Joshua P. Scallan
- Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States of America
| | - Mark Y. Chiang
- Department of Internal Medicine, Division of Hematology-Oncology, Medical School, University of Michigan, Ann Arbor, MI, United States of America
| | - Maria J. Galazo
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
- Tulane Brain Institute, Tulane University, New Orleans, LA, United States of America
| | - Stryder M. Meadows
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States of America
- Tulane Brain Institute, Tulane University, New Orleans, LA, United States of America
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K. C. R, Tiemroth AS, Thurmon AN, Meadows SM, Galazo MJ. Zmiz1 is a novel regulator of brain development associated with autism and intellectual disability. Front Psychiatry 2024; 15:1375492. [PMID: 38686122 PMCID: PMC11057416 DOI: 10.3389/fpsyt.2024.1375492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 03/26/2024] [Indexed: 05/02/2024] Open
Abstract
Neurodevelopmental disorders (NDDs) are a class of pathologies arising from perturbations in brain circuit formation and maturation with complex etiological triggers often classified as environmental and genetic. Neuropsychiatric conditions such as autism spectrum disorders (ASD), intellectual disability (ID), and attention deficit hyperactivity disorders (ADHD) are common NDDs characterized by their hereditary underpinnings and inherent heterogeneity. Genetic risk factors for NDDs are increasingly being identified in non-coding regions and proteins bound to them, including transcriptional regulators and chromatin remodelers. Importantly, de novo mutations are emerging as important contributors to NDDs and neuropsychiatric disorders. Recently, de novo mutations in transcriptional co-factor Zmiz1 or its regulatory regions have been identified in unrelated patients with syndromic ID and ASD. However, the role of Zmiz1 in brain development is unknown. Here, using publicly available databases and a Zmiz1 mutant mouse model, we reveal that Zmiz1 is highly expressed during embryonic brain development in mice and humans, and though broadly expressed across the brain, Zmiz1 is enriched in areas prominently impacted in ID and ASD such as cortex, hippocampus, and cerebellum. We investigated the relationship between Zmiz1 structure and pathogenicity of protein variants, the epigenetic marks associated with Zmiz1 regulation, and protein interactions and signaling pathways regulated by Zmiz1. Our analysis reveals that Zmiz1 regulates multiple developmental processes, including neurogenesis, neuron connectivity, and synaptic signaling. This work paves the way for future studies on the functions of Zmiz1 and highlights the importance of combining analysis of mouse models and human data.
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Affiliation(s)
- Rajan K. C.
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States
| | - Alina S. Tiemroth
- Tulane Brain Institute, Tulane University, New Orleans, LA, United States
| | - Abbigail N. Thurmon
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States
| | - Stryder M. Meadows
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States
- Tulane Brain Institute, Tulane University, New Orleans, LA, United States
| | - Maria J. Galazo
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA, United States
- Tulane Brain Institute, Tulane University, New Orleans, LA, United States
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He L, Wang Y, Pan J, Guo L, Zhou H, Zhang L. Clinical report and genetic analysis of a novel variant in ZMIZ1 causing neurodevelopmental disorder with dysmorphic factors and distal skeletal anomalies in a Chinese family. Genes Genomics 2024; 46:489-498. [PMID: 38117436 DOI: 10.1007/s13258-023-01480-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 12/07/2023] [Indexed: 12/21/2023]
Abstract
BACKGROUND Neurodevelopmental disorder with dysmorphic factors and distal skeletal anomalies (NEDDFSA) is a rare and phenotypically variable disorder. The zinc finger MIZ-type containing 1 gene (ZMIZ1) is a causative gene of NEDDFSA that encodes a protein inhibitor of the activated STAT-like family transcriptional regulator. Given the rarity of reported NEDDFSA cases, new phenotypes and genotypes of this disorder are still being discovered. OBJECTIVE This study describes the phenotype characteristics of a Chinese NEDDFSA family caused by a novel ZMIZ1 variant. METHODS We reviewed the clinical phenotype of a Chinese patient with NEDDFSA and performed whole-exome sequencing (WES) of the patient's family. We simulated the potential biological harmfulness of the mutant protein. Plasmids were constructed and used for western blot and immunofluorescence assays to analyze protein expression levels. RESULTS The patient was a 6-month-old male infant who exhibited dysmorphic facial features, neurodevelopmental abnormalities, congenital heart disease, and previously unreported genitourinary system anomalies. WES revealed a non-frameshift deletion variant in ZMIZ1 (NM_020338.4: c.858_875del, p.Val288_Ala293del), resulting in a structural alteration in the protein's alanine-rich domain. Western blot and immunofluorescence assays indicated a significant decrease in the expression level of the mutant ZMIZ1 protein compared to the wild-type protein. CONCLUSION The clinical manifestations of this patient may be associated with the ZMIZ1 variant, and the structural alteration in the alanine-rich domain of the ZMIZ1 protein may contribute to a more complex disease phenotype. These results expand the genotype-phenotype correlation of ZMIZ1.
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Affiliation(s)
- Liting He
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Minhang District, Shanghai, 200240, China
| | - Yao Wang
- Department of Pediatrics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230002, China
| | - Jiahua Pan
- Department of Pediatrics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230002, China
| | - Limin Guo
- Department of Pediatrics, The Third Affiliated Hospital of Bengbu Medical College, Suzhou, 234011, China
| | - Haoquan Zhou
- Department of Pediatrics, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230002, China.
| | - Lan Zhang
- Department of Pediatrics, The Fifth People's Hospital of Shanghai, Fudan University, Minhang District, Shanghai, 200240, China.
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Rajan KC, Patel NR, Shenoy A, Scallan JP, Chiang MY, Galazo MJ, Meadows SM. Zmiz1 is a novel regulator of lymphatic endothelial cell gene expression and function. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.22.550165. [PMID: 37503058 PMCID: PMC10370198 DOI: 10.1101/2023.07.22.550165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Zinc Finger MIZ-Type Containing 1 (Zmiz1), also known as ZIMP10 or RAI17, is a transcription cofactor and member of the Protein Inhibitor of Activated STAT (PIAS) family of proteins. Zmiz1 is critical for a variety of biological processes including vascular development. However, its role in the lymphatic vasculature is unknown. In this study, we utilized human dermal lymphatic endothelial cells (HDLECs) and an inducible, lymphatic endothelial cell (LEC)-specific Zmiz1 knockout mouse model to investigate the role of Zmiz1 in LECs. Transcriptional profiling of Zmiz1-deficient HDLECs revealed downregulation of genes crucial for lymphatic vessel development. Additionally, our findings demonstrated that loss of Zmiz1 results in reduced expression of proliferation and migration genes in HDLECs and reduced proliferation and migration in vitro. We also presented evidence that Zmiz1 regulates Prox1 expression in vitro and in vivo by modulating chromatin accessibility at Prox1 regulatory regions. Furthermore, we observed that loss of Zmiz1 in mesenteric lymphatic vessels significantly reduced valve density. Collectively, our results highlight a novel role of Zmiz1 in LECs and as a transcriptional regulator of Prox1, shedding light on a previously unknown regulatory factor in lymphatic vascular biology.
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Affiliation(s)
- K C Rajan
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA
| | - Nehal R Patel
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA
| | - Anoushka Shenoy
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA
| | - Joshua P Scallan
- Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Mark Y Chiang
- Division of Hematology-Oncology, Department of Internal Medicine, Medical School, University of Michigan, Ann Arbor, MI
| | - Maria J Galazo
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA
- Tulane Brain Institute, Tulane University, New Orleans, LA
| | - Stryder M Meadows
- Department of Cell and Molecular Biology, Tulane University, New Orleans, LA
- Tulane Brain Institute, Tulane University, New Orleans, LA
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Lomelí H. ZMIZ proteins: partners in transcriptional regulation and risk factors for human disease. J Mol Med (Berl) 2022; 100:973-983. [PMID: 35670836 DOI: 10.1007/s00109-022-02216-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/11/2022] [Accepted: 05/30/2022] [Indexed: 01/23/2023]
Abstract
Coregulator proteins interact with signal-dependent transcription factors to modify their transcriptional activity. ZMIZ1 and ZMIZ2 (zinc finger MIZ-type containing 1 and 2) are coregulators with nonredundant functions that share unique structural characteristics. Among other interacting domains, they possess a MIZ (Msx-interacting zinc finger) that relates them to members of the protein inhibitor of activated STAT (PIAS) family and provides them the capacity to function as SUMO E3 ligases. The ZMIZ proteins stimulate the activity of various signaling pathways, including the androgen receptor (AR), P53, SMAD3/4, WNT/β-catenin, and NOTCH1 pathways, and interact with the BAF chromatin remodeling complex. Due to their molecular versatility, ZMIZ proteins have pleiotropic effects and thus are important for embryonic development and for human diseases. Both have been widely associated with cancer, and ZMIZ1 has been very frequently identified as a risk allele for several autoimmune conditions and other disorders. Moreover, mutations in the coding region of the ZMIZ1 gene are responsible for a severe syndromic neurodevelopmental disability. Because the actions of coregulators are highly gene-specific, a better knowledge of the associations that exist between the function of the ZMIZ coregulators and human pathologies is expected to potentiate the use of ZMIZ1 and ZMIZ2 as new drug targets for diseases such as hormone-dependent cancers.
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Affiliation(s)
- Hilda Lomelí
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, México.
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Lu G, Ma L, Xu P, Xian B, Wu L, Ding J, He X, Xia H, Ding W, Yang Z, Peng Q. A de Novo ZMIZ1 Pathogenic Variant for Neurodevelopmental Disorder With Dysmorphic Facies and Distal Skeletal Anomalies. Front Genet 2022; 13:840577. [PMID: 35432459 PMCID: PMC9008544 DOI: 10.3389/fgene.2022.840577] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/22/2022] [Indexed: 12/30/2022] Open
Abstract
Background: Neurodevelopmental disorder with dysmorphic facies and distal skeletal anomalies (NEDDFSA) is a rare syndromic disorder characterized by global neurodevelopmental delay, early-onset hypotonia, poor overall growth, poor speech/language ability, and additional common phenotypes such as eye anomalies, joint hypermobility, and skeletal anomalies of the hands and feet. NEDDFSA is caused by heterozygous pathogenic variants in the ZMIZ1 gene on chromosome 10q22.3 with autosomal dominant (AD) mode of inheritance. All the 32 reported cases with variants in ZMIZ1 gene had a genetic background in Caucasian, Hispanic, North African, and Southeastern Asian. Until now, there are no reports of Chinese patients with ZMIZ1 pathogenic variants. Methods: A 5-year-old girl was found to have the characteristic phenotypes of NEDDFSA. Array-Comparative Genomic Hybridization (array-CGH) and whole exome sequencing (WES) were applied for the trio of this female patient. Sanger sequencing was used to verify the selected variants. A comprehensive molecular analysis was carried out by protein structure prediction, evolutionary conservation, motif scanning, tissue-specific expression, and protein interaction network to elucidate pathogenicity of the identified ZMIZ1 variants. Results: The karyotype was 46, XX with no micro-chromosomal abnormalities identified by array-CGH. There were 20 variants detected in the female patient by WES. A de novo heterozygous missense variant (c.2330G > A, p.Gly777Glu, G777E) was identified in the exon 20 of ZMIZ1. No variants of ZMIZ1 were identified in the non-consanguineous parents and her healthy elder sister. It was predicted that G777E was pathogenic and detrimental to the spatial conformation of the MIZ/SP-RING zinc finger domain of ZMIZ1. Conclusion: Thus far, only four scientific articles reported deleterious variants in ZMIZ1 and most of the cases were from Western countries. This is the first report about a Chinese patient with ZMIZ1 variant. It will broaden the current knowledge of ZMIZ1 variants and variable clinical presentations for clinicians and genetic counselors.
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Affiliation(s)
- Guanting Lu
- Deyang Key Laboratory of Tumor Molecular Research, Department of Pathology, Translational Medicine Research Center, Deyang People’s Hospital, Deyang, China
| | - Liya Ma
- Department of Child Healthcare, Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, Shenzhen, China
| | - Pei Xu
- Deyang Key Laboratory of Tumor Molecular Research, Department of Pathology, Translational Medicine Research Center, Deyang People’s Hospital, Deyang, China
| | - Binqiang Xian
- Department of Child Healthcare, Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, Shenzhen, China
| | - Lianying Wu
- Deyang Key Laboratory of Tumor Molecular Research, Department of Pathology, Translational Medicine Research Center, Deyang People’s Hospital, Deyang, China
| | - Jianying Ding
- Department of Child Healthcare, Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, Shenzhen, China
| | - Xiaoyan He
- Deyang Key Laboratory of Tumor Molecular Research, Department of Pathology, Translational Medicine Research Center, Deyang People’s Hospital, Deyang, China
| | - Huiyun Xia
- Department of Child Healthcare, Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, Shenzhen, China
| | - Wuwu Ding
- Deyang Key Laboratory of Tumor Molecular Research, Department of Pathology, Translational Medicine Research Center, Deyang People’s Hospital, Deyang, China
| | - Zhirong Yang
- Deyang Key Laboratory of Tumor Molecular Research, Department of Pathology, Translational Medicine Research Center, Deyang People’s Hospital, Deyang, China
- *Correspondence: Qiongling Peng, ; Zhirong Yang,
| | - Qiongling Peng
- Department of Child Healthcare, Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, Shenzhen, China
- *Correspondence: Qiongling Peng, ; Zhirong Yang,
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Phetthong T, Khongkrapan A, Jinawath N, Seo GH, Wattanasirichaigoon D. Compound Heterozygote of Point Mutation and Chromosomal Microdeletion Involving OTUD6B Coinciding with ZMIZ1 Variant in Syndromic Intellectual Disability. Genes (Basel) 2021; 12:genes12101583. [PMID: 34680978 PMCID: PMC8535745 DOI: 10.3390/genes12101583] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/29/2021] [Accepted: 09/29/2021] [Indexed: 02/02/2023] Open
Abstract
The OTUD6B and ZMIZ1 genes were recently identified as causes of syndromic intellectual disability (ID) with shared phenotypes of facial dysmorphism, distal limb anomalies, and seizure disorders. OTUD6B- and ZMIZ1-related ID are inherited in autosomal recessive and autosomal dominant patterns, respectively. We report a 5-year-old girl with developmental delay, facial phenotypes resembling Williams syndrome, and cardiac defects. The patient also had terminal broadening of the fingers and polydactyly. Cytogenomic microarray (CMA), whole exome sequencing (WES), and mRNA analysis were performed. The CMA showed a paternally inherited 0.118 Mb deletion of 8q21.3, chr8:92084087–92202189, with OTUD6B involved. The WES identified a hemizygous OTUD6B variant, c.873delA (p.Lys291AsnfsTer3). The mother was heterozygous for this allele. The WES also demonstrated a heterozygous ZMIZ1 variant, c.1491 + 2T > C, in the patient and her father. This ZMIZ1 variant yielded exon 14 skipping, as evidenced by mRNA study. We suggest that Williams syndrome-like phenotypes, namely, periorbital edema, hanging cheek, and long and smooth philtrum represent expanded phenotypes of OTUD6B-related ID. Our data expand the genotypic spectrum of OTUD6B- and ZMIZ1-related disorders. This is the first reported case of a compound heterozygote featuring point mutation, chromosomal microdeletion of OTUD6B, and the unique event of OTUD6B, coupled with ZMIZ1 variants.
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Affiliation(s)
- Tim Phetthong
- Division of Medical Genetics, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand; (T.P.); (A.K.)
- Division of Medical Genetics, Department of Pediatrics, Phramongkutklao Hospital and Phramongkutklao College of Medicine, Bangkok 10400, Thailand
| | - Arthaporn Khongkrapan
- Division of Medical Genetics, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand; (T.P.); (A.K.)
| | - Natini Jinawath
- Program in Translational Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand;
- Integrative Computational Bioscience Center, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Go-Hun Seo
- Department of Medical Genetics, 3billion, Inc., Seoul 05505, Korea;
| | - Duangrurdee Wattanasirichaigoon
- Division of Medical Genetics, Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand; (T.P.); (A.K.)
- Correspondence:
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