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Pan X, Liu L, Zhang X, Tang X, Qian G, Qiu H, Lin S, Yao H, Dong X, Tan B. FBXO11 variants are associated with intellectual disability and variable clinical manifestation in Chinese affected individuals. J Hum Genet 2024; 69:391-400. [PMID: 38740982 DOI: 10.1038/s10038-024-01255-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 04/01/2024] [Accepted: 04/24/2024] [Indexed: 05/16/2024]
Abstract
F-box protein 11 (FBXO11) is a member of F-Box protein family, which has recently been proved to be associated with intellectual developmental disorder with dysmorphic facies and behavioral abnormalities (IDDFBA, OMIM: 618089). In this study, 12 intellectual disability individuals from 5 Chinese ID families were collected, and whole exome sequencing (WES), sanger sequencing, and RNA sequencing (RNA-seq) were conducted. Almost all the affected individuals presented with mild to severe intellectual disability (12/12), global developmental delay (10/12), speech and language development delay (8/12) associated with a range of alternate features including increased body weight (7/12), short stature (6/12), seizures (3/12), reduced visual acuity (4/12), hypotonia (1/12), and auditory hallucinations and hallucinations (1/12). Distinguishingly, malformation was not observed in all the affected individuals. WES analysis showed 5 novel FBXO11 variants, which include an inframe deletion variant, a missense variant, two frameshift variants, and a partial deletion of FBXO11 (exon 22-23). RNA-seq indicated that exon 22-23 deletion of FBXO11 results in a new mRNA structure. Conservation and protein structure prediction demonstrated deleterious effect of these variants. The DEGs analysis revealed 148 differentially expressed genes shared among 6 affected individuals, which were mainly associated with genes of muscle and immune system. Our research is the first report of FBXO11-associated IDDFBA in Chinese individuals, which expands the genetic and clinical spectrum of this newly identified NDD/ID syndrome.
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Affiliation(s)
- Xin Pan
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China
| | - Li Liu
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China
| | - Xu Zhang
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China
| | - Xianglan Tang
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China
| | - Guanhua Qian
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China
| | - Hao Qiu
- Center for Clinical Genetics and Genomics, DIAN Diagnostics, Hangzhou, 310058, Zhejiang, China
| | - Shuhong Lin
- Center for Clinical Genetics and Genomics, DIAN Diagnostics, Hangzhou, 310058, Zhejiang, China
| | - Hong Yao
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China
| | - Xiaojing Dong
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China
| | - Bo Tan
- Department of Gynecology and Obstetrics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, 400000, China.
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Mégarbané A, Mehawej C, Mahfoud D, Chouery E, Devriendt K, Hijazi M, Ryu SW, Kim J, McNeill A. How many phenotypes for the FBXO11 related disease? Report on a new patient with a tricho-rhino-phalangeal like phenotype. Eur J Med Genet 2024; 69:104944. [PMID: 38679370 DOI: 10.1016/j.ejmg.2024.104944] [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: 08/05/2023] [Revised: 03/11/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
Here we report the case of a young boy with developmental delay, thin sparse hair, early closure of the anterior fontanel, bilateral choanal atresia, brachyturicephaly; and dysmorphic features closely resembling those seen in trichorhinophalangeal syndrome (TRPS). These features include sparse hair, sparse lateral eyebrows, a bulbous pear shaped nose, a long philtrum, thin lips, small/hypoplastic nails, pes planovalgus; bilateral cone-shaped epiphyses at the proximal 5th phalanx, slender long bones, coxa valga, mild scoliosis, and delayed bone age. Given that TRPS had been excluded by a thorough genetic analysis, whole exome sequencing was performed and a heterozygous likely pathogenic variant was identified in the FBXO11 gene (NM_001190274.2: c.1781A > G; p. His594Arg), confirming the diagnosis of the newly individualized IDDFBA syndrome: Intellectual Developmental Disorder, dysmorphic Facies, and Behavioral Abnormalities (OMIM# 618,089). Our findings further delineate the clinical spectrum linked to FBXO11 and highlight the importance of investigating further cases with mutations in this gene to establish a potential genotype-phenotype correlation.
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Affiliation(s)
- Andre Mégarbané
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon; Institut Jerome Lejeune, Paris, France.
| | - Cybel Mehawej
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon.
| | - Daniel Mahfoud
- Department of Radiology, Medical Center - Rizk Hospital, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Lebanon.
| | - Eliane Chouery
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon.
| | - Koenraad Devriendt
- Center for Human Genetics, University of Leuven (KU) and University Hospitals Leuven (UZ), Louvain, Belgium.
| | - Mariam Hijazi
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon.
| | | | - JiHye Kim
- 3 Billion Inc., Seoul, Republic of Korea.
| | - Alisdair McNeill
- Sheffield Institute for Translational Neuroscience, The University of Sheffield, Sheffield, UK.
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Silva RG, Dupont J, Silva E, Sousa AB. New ocular findings in a patient with a novel pathogenic variant in the FBXO11 gene. J AAPOS 2022; 26:268-270. [PMID: 35940561 DOI: 10.1016/j.jaapos.2022.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/27/2022] [Accepted: 05/15/2022] [Indexed: 11/26/2022]
Abstract
Intellectual developmental disorder with dysmorphic facies and behavioral abnormalities (IDDFBA) is a recently described autosomal dominant entity caused by pathogenic variants, mostly de novo, in the FBXO11 gene. It presents in the first years of life with highly variable clinical manifestations. The main features of IDDFBA include borderline-to-severe intellectual disability, behavioral problems, hypotonia, facial dysmorphisms, minor skeletal abnormalities, and recurrent infections. Although eye problems, such as refractive errors, eye misalignment and minor visual changes, have been described in about 48% of patients, a major ocular defect, namely, bilateral optic nerve hypoplasia, has been reported in the literature only once. We report an 8-year-old boy with a novel de novo pathogenic variant in FBXO11 gene (NM_001190274.1: c.1166dup, p.Cys390Metfs∗3) and a complex ophthalmological phenotype, consisting of right microphthalmia, very shallow anterior chamber, and persistent pupillary membrane, right dense nuclear cataract, bilateral optic nerve hypoplasia, and bilateral horizontal manifest nystagmus.
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Affiliation(s)
- Raquel Gouveia Silva
- Serviço de Genética Médica, Departamento de Pediatria, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal.
| | - Juliette Dupont
- Serviço de Genética Médica, Departamento de Pediatria, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal
| | - Eduardo Silva
- CRI-OftaPED, Hospital Dona Estefânia, Centro Hospitalar Universitário de Lisboa Central, Lisbon, Portugal
| | - Ana Berta Sousa
- Serviço de Genética Médica, Departamento de Pediatria, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisbon, Portugal; Laboratório de Imunologia Básica, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
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Gregor A, Meerbrei T, Gerstner T, Toutain A, Lynch SA, Stals K, Maxton C, Lemke JR, Bernat JA, Bombei HM, Foulds N, Hunt D, Kuechler A, Beygo J, Stöbe P, Bouman A, Palomares-Bralo M, Santos-Simarro F, Garcia-Minaur S, Pacio-Miguez M, Popp B, Vasileiou G, Hebebrand M, Reis A, Schuhmann S, Krumbiegel M, Brown NJ, Sparber P, Melikyan L, Bessonova L, Cherevatova T, Sharkov A, Shcherbakova N, Dabir T, Kini U, Schwaibold EMC, Haack TB, Bertoli M, Hoffjan S, Falb R, Shinawi M, Sticht H, Zweier C. De novo missense variants in FBXO11 alter its protein expression and subcellular localization. Hum Mol Genet 2021; 31:440-454. [PMID: 34505148 PMCID: PMC8825234 DOI: 10.1093/hmg/ddab265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/09/2021] [Accepted: 09/05/2021] [Indexed: 12/28/2022] Open
Abstract
Recently, others and we identified de novo FBXO11 (F-Box only protein 11) variants as causative for a variable neurodevelopmental disorder (NDD). We now assembled clinical and mutational information on 23 additional individuals. The phenotypic spectrum remains highly variable, with developmental delay and/or intellectual disability as the core feature and behavioral anomalies, hypotonia and various facial dysmorphism as frequent aspects. The mutational spectrum includes intragenic deletions, likely gene disrupting and missense variants distributed across the protein. To further characterize the functional consequences of FBXO11 missense variants, we analyzed their effects on protein expression and localization by overexpression of 17 different mutant constructs in HEK293 and HeLa cells. We found that the majority of missense variants resulted in subcellular mislocalization and/or reduced FBXO11 protein expression levels. For instance, variants located in the nuclear localization signal and the N-terminal F-Box domain lead to altered subcellular localization with exclusion from the nucleus or the formation of cytoplasmic aggregates and to reduced protein levels in western blot. In contrast, variants localized in the C-terminal Zn-finger UBR domain lead to an accumulation in the cytoplasm without alteration of protein levels. Together with the mutational data, our functional results suggest that most missense variants likely lead to a loss of the original FBXO11 function and thereby highlight haploinsufficiency as the most likely disease mechanism for FBXO11-associated NDDs.
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Affiliation(s)
- Anne Gregor
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany.,Department of Human Genetics, Inselspital Bern, University of Bern, 3010, Bern, Switzerland
| | - Tanja Meerbrei
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | | | - Annick Toutain
- Service de Génétique, CHU de Tours, 37044, Tours, France.,UMR 1253, iBrain, Université de Tours, Inserm, Tours, France
| | - Sally Ann Lynch
- Dept of Clinical Genetics, Temple Street Children's Hospital Dublin 1, D01 YC67, Dublin, Ireland
| | - Karen Stals
- Exeter Genomics Laboratory, Royal Devon & Exeter NHS Foundation Trust, Exeter, EX2 5DW, UK
| | | | - Johannes R Lemke
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, 04103 Leipzig, Germany
| | - John A Bernat
- Division of Medical Genetics & Genomics, Stead Family Department of Pediatrics, University of Iowa Hospital and Clinics, 52242, Iowa City, IA, USA
| | - Hannah M Bombei
- Division of Medical Genetics & Genomics, Stead Family Department of Pediatrics, University of Iowa Hospital and Clinics, 52242, Iowa City, IA, USA
| | - Nicola Foulds
- Wessex Clinical Genetics Services, University Hospital Southampton, Southampton, SO16 5YA, UK
| | - David Hunt
- Wessex Clinical Genetics Services, University Hospital Southampton, Southampton, SO16 5YA, UK.,Department of Human Genetics and Genomic Medicine, Faculty of Medicine, University of Southampton, Southampton, SO16 5YA, UK
| | - Alma Kuechler
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, 45147, Essen, Germany
| | - Jasmin Beygo
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, 45147, Essen, Germany
| | - Petra Stöbe
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076, Tübingen, Germany
| | - Arjan Bouman
- Department of Clinical Genetics, Erasmus MC University Medical Center Rotterdam, 3015 GD, Rotterdam, The Netherlands
| | - Maria Palomares-Bralo
- Institute of Medical and Molecular Genetics, University Hospital La Paz, 28046 Madrid, Spain
| | - Fernando Santos-Simarro
- Institute of Medical and Molecular Genetics, University Hospital La Paz, 28046 Madrid, Spain
| | - Sixto Garcia-Minaur
- Institute of Medical and Molecular Genetics, University Hospital La Paz, 28046 Madrid, Spain
| | - Marta Pacio-Miguez
- Institute of Medical and Molecular Genetics, University Hospital La Paz, 28046 Madrid, Spain
| | - Bernt Popp
- Institute of Human Genetics, University of Leipzig Hospitals and Clinics, 04103 Leipzig, Germany
| | - Georgia Vasileiou
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Moritz Hebebrand
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - André Reis
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Sarah Schuhmann
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Mandy Krumbiegel
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Natasha J Brown
- Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Melbourne, VIC 3010, Australia.,Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Parkville, VIC 3052, Australia
| | - Peter Sparber
- Research Centre for Medical Genetics, Moscow, 115522, Russia
| | - Lyusya Melikyan
- Research Centre for Medical Genetics, Moscow, 115522, Russia
| | | | | | - Artem Sharkov
- Veltischev Research and Clinical Institute for Pediatrics of the Pirogov Russian National Research Medical University, Genomed Ltd., Moscow, 117997, Russia
| | - Natalia Shcherbakova
- Veltischev Research and Clinical Institute for Pediatrics of the Pirogov Russian National Research Medical University, Genomed Ltd., Moscow, 117997, Russia.,Independent Clinical Bioinformatics Laboratory, Moscow, 117997, Russia
| | - Tabib Dabir
- Department of Genetic Medicine, Belfast City Hospital, Belfast, BT9 7AB, Northern Ireland, United Kingdom
| | - Usha Kini
- Oxford Centre for Genomic Medicine, Oxford and Spires Cleft Centre, Oxford, OX3 9DU, UK
| | - Eva M C Schwaibold
- Institute of Human Genetics, Heidelberg University, 69120, Heidelberg, Germany
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076, Tübingen, Germany
| | - Marta Bertoli
- Northern Genetics Service, Newcastle upon Tyne NHS Foundation Trust, Newcastle upon Tyne, NE1 3BZ, UK
| | - Sabine Hoffjan
- Department of Human Genetics, Ruhr University, 44801, Bochum, Germany
| | - Ruth Falb
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076, Tübingen, Germany
| | - Marwan Shinawi
- Division of Genetics and Genomic Medicine, Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Heinrich Sticht
- Institute of Biochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Christiane Zweier
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany.,Department of Human Genetics, Inselspital Bern, University of Bern, 3010, Bern, Switzerland
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