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Brooks D, Burke E, Lee S, Eble TN, O'Leary M, Osei-Owusu I, Rehm HL, Dhar SU, Emrick L, Bick D, Nehrebecky M, Macnamara E, Casas-Alba D, Armstrong J, Prat C, Martínez-Monseny AF, Palau F, Liu P, Adams D, Lalani S, Rosenfeld JA, Burrage LC. Heterozygous MAP3K20 variants cause ectodermal dysplasia, craniosynostosis, sensorineural hearing loss, and limb anomalies. Hum Genet 2024; 143:279-291. [PMID: 38451290 PMCID: PMC11191325 DOI: 10.1007/s00439-024-02657-2] [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: 11/17/2023] [Accepted: 02/13/2024] [Indexed: 03/08/2024]
Abstract
Biallelic pathogenic variants in MAP3K20, which encodes a mitogen-activated protein kinase, are a rare cause of split-hand foot malformation (SHFM), hearing loss, and nail abnormalities or congenital myopathy. However, heterozygous variants in this gene have not been definitively associated with a phenotype. Here, we describe the phenotypic spectrum associated with heterozygous de novo variants in the linker region between the kinase domain and leucine zipper domain of MAP3K20. We report five individuals with diverse clinical features, including craniosynostosis, limb anomalies, sensorineural hearing loss, and ectodermal dysplasia-like phenotypes who have heterozygous de novo variants in this specific region of the gene. These individuals exhibit both shared and unique clinical manifestations, highlighting the complexity and variability of the disorder. We propose that the involvement of MAP3K20 in endothelial-mesenchymal transition provides a plausible etiology of these features. Together, these findings characterize a disorder that both expands the phenotypic spectrum associated with MAP3K20 and highlights the need for further studies on its role in early human development.
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Affiliation(s)
- Daniel Brooks
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Elizabeth Burke
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Sukyeong Lee
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX, USA
- Advanced Technology Core for Macromolecular X-Ray Crystallography, Baylor College of Medicine, Houston, TX, USA
| | - Tanya N Eble
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Melanie O'Leary
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Ikeoluwa Osei-Owusu
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Heidi L Rehm
- Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Shweta U Dhar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Lisa Emrick
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Pediatrics, Section of Neurology and Developmental Neuroscience, Baylor College of Medicine, Houston, TX, USA
- Texas Children's Hospital, Houston, TX, USA
| | - David Bick
- Hudson Alpha Institute for Biotechnology, Huntsville, AL, USA
| | - Michelle Nehrebecky
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Ellen Macnamara
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Dídac Casas-Alba
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
| | - Judith Armstrong
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
| | - Carolina Prat
- Department of Dermatology, Hospital Sant Joan de Deu, Esplugues de Llobregat, 08950, Barcelona, Spain
| | - Antonio F Martínez-Monseny
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
| | - Francesc Palau
- Department of Genetic Medicine, Pediatric Institute of Rare Diseases (IPER), CIBER on Rare Diseases (CIBERER), Hospital Sant Joan de DéuEsplugues de Llobregat, 08950, Barcelona, Spain
- Division of Pediatrics, University of Barcelona School of Medicine and Health Sciences, Barcelona, Spain
| | - Pengfei Liu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Baylor Genetics, Houston, TX, USA
| | - David Adams
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | - Seema Lalani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
- Texas Children's Hospital, Houston, TX, USA
| | - Jill A Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
| | - Lindsay C Burrage
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.
- Texas Children's Hospital, Houston, TX, USA.
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Akimova D, Markova T, Ampleeva M, Skoblov M. Variable clinical presentation of split hand/foot malformation syndrome in a family with microduplication of 10q24.32: a case report. Front Genet 2024; 14:1303807. [PMID: 38250576 PMCID: PMC10796452 DOI: 10.3389/fgene.2023.1303807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 12/13/2023] [Indexed: 01/23/2024] Open
Abstract
SHFM (Split Hand/Foot Malformation) is a heterogeneous group of disorders characterized by the presence of clefts in the hands and feet, along with syndactyly of the digits. In this article, we describe a family in which two members exhibit characteristic developmental abnormalities associated with SHFM, presenting with variable clinical features. Using whole-genome sequencing, we identified a microduplication of a chromosomal segment on locus 10q24.32, specifically spanning positions 102934495 to 103496555, encompassing genes BTRC, POLL, FBXW4 and LBX1 in the proband. Genomic duplications, including these genes, were previously described in patients diagnosed with the third type of SHFM. We validated the presence of this structural rearrangement in 7 family members, including the proband and the proband's father. Remarkably, further investigation demonstrated that the detected duplication exhibits a mosaic state in the phenotypically normal paternal grandmother of the proband, thereby providing a plausible explanation for the absence of a pathological phenotype in her.
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Affiliation(s)
- Daria Akimova
- Research Centre for Medical Genetics, Moscow, Russia
| | | | - Maria Ampleeva
- Independent Clinical Bioinformatics Laboratory, Moscow, Russia
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Zhu M, Wang Y, Guan L, Lu C, Sun R, Chen Y, Shi J, Zhu Y, Wang D. A novel chromosome 2q24.3-q32.1 microdeletion in a fetus with multiple malformations. J Clin Lab Anal 2022; 36:e24602. [PMID: 35819063 PMCID: PMC9396185 DOI: 10.1002/jcla.24602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Terminal or interstitial deletion of chromosome 2q is rarely reported but clinically significant, which can result in developmental malformations and psychomotor retardation in humans. In the present study, we analyzed this deletion to comprehensively clarify the relationship between phenotype and microdeletion region. METHODS We collected clinical records of the fetus and summarized patient symptoms. Subsequently, genomic DNA was extracted from fetal tissue or peripheral blood collected from parents. In addition, whole-exome sequencing (WES) and copy number variation sequencing (CNV-seq) were performed. RESULTS The fetus presented a previously unreported interstitial deletion of 2q24.3-q32.1. WES and CNV-seq revealed a de novo 18.46 Mb deletion at 2q24.3-q32.1, a region involving 94 protein-coding genes, including HOXD13, MAP3K20, DLX1, DLX2, SCN2A, and SCN1A. The fetus had upper and lower limb malformations, including camptodactyly and syndactyly, along with congenital cardiac defects. CONCLUSION Herein, we report a fetus with a novel microdeletion of chromosome 2q24.3-q32.1, likely a heterozygous pathogenic variant. Haploinsufficiency of HOXD13 might be related to limb deformity in the fetus.
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Affiliation(s)
- Mianmian Zhu
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yihong Wang
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Lijie Guan
- Department of Ultrasound imaging, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Chaosheng Lu
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Rongyue Sun
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yuan Chen
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jiamin Shi
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yanying Zhu
- Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Dan Wang
- Department of Pediatrics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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