1
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Werren EA, LaForce GR, Srivastava A, Perillo DR, Li S, Johnson K, Baris S, Berger B, Regan SL, Pfennig CD, de Munnik S, Pfundt R, Hebbar M, Jimenez-Heredia R, Karakoc-Aydiner E, Ozen A, Dmytrus J, Krolo A, Corning K, Prijoles EJ, Louie RJ, Lebel RR, Le TL, Amiel J, Gordon CT, Boztug K, Girisha KM, Shukla A, Bielas SL, Schaffer AE. TREX tetramer disruption alters RNA processing necessary for corticogenesis in THOC6 Intellectual Disability Syndrome. Nat Commun 2024; 15:1640. [PMID: 38388531 PMCID: PMC10884030 DOI: 10.1038/s41467-024-45948-y] [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: 10/02/2022] [Accepted: 02/07/2024] [Indexed: 02/24/2024] Open
Abstract
THOC6 variants are the genetic basis of autosomal recessive THOC6 Intellectual Disability Syndrome (TIDS). THOC6 is critical for mammalian Transcription Export complex (TREX) tetramer formation, which is composed of four six-subunit THO monomers. The TREX tetramer facilitates mammalian RNA processing, in addition to the nuclear mRNA export functions of the TREX dimer conserved through yeast. Human and mouse TIDS model systems revealed novel THOC6-dependent, species-specific TREX tetramer functions. Germline biallelic Thoc6 loss-of-function (LOF) variants result in mouse embryonic lethality. Biallelic THOC6 LOF variants reduce the binding affinity of ALYREF to THOC5 without affecting the protein expression of TREX members, implicating impaired TREX tetramer formation. Defects in RNA nuclear export functions were not detected in biallelic THOC6 LOF human neural cells. Instead, mis-splicing was detected in human and mouse neural tissue, revealing novel THOC6-mediated TREX coordination of mRNA processing. We demonstrate that THOC6 is required for key signaling pathways known to regulate the transition from proliferative to neurogenic divisions during human corticogenesis. Together, these findings implicate altered RNA processing in the developmental biology of TIDS neuropathology.
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Affiliation(s)
- Elizabeth A Werren
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Advanced Precision Medicine Laboratory, The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Geneva R LaForce
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Anshika Srivastava
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Department of Medical Genetics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, 226014, India
| | - Delia R Perillo
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Shaokun Li
- Advanced Precision Medicine Laboratory, The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Katherine Johnson
- Advanced Precision Medicine Laboratory, The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Safa Baris
- Division of Pediatric Allergy and Immunology, School of Medicine, Marmara University, Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, The Isil Berat Barlan Center for Translational Medicine, Istanbul, 34722, Turkey
| | - Brandon Berger
- Advanced Precision Medicine Laboratory, The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Samantha L Regan
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Christian D Pfennig
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Sonja de Munnik
- Department of Human Genetics, Radboud University Medical Centre Nijmegen, Nijmegen, 6524, the Netherlands
| | - Rolph Pfundt
- Department of Human Genetics, Radboud University Medical Centre Nijmegen, Nijmegen, 6524, the Netherlands
| | - Malavika Hebbar
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, 98195, Seattle, WA, USA
| | - Raúl Jimenez-Heredia
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, 1090, Austria
| | - Elif Karakoc-Aydiner
- Division of Pediatric Allergy and Immunology, School of Medicine, Marmara University, Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, The Isil Berat Barlan Center for Translational Medicine, Istanbul, 34722, Turkey
| | - Ahmet Ozen
- Division of Pediatric Allergy and Immunology, School of Medicine, Marmara University, Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, The Isil Berat Barlan Center for Translational Medicine, Istanbul, 34722, Turkey
| | - Jasmin Dmytrus
- Research Centre for Molecular Medicine of the Austrian Academy of Sciences, Vienna, 1090, Austria
| | - Ana Krolo
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, 1090, Austria
| | - Ken Corning
- Greenwood Genetic Center, Greenwood, SC, 29646, USA
| | - E J Prijoles
- Greenwood Genetic Center, Greenwood, SC, 29646, USA
| | | | - Robert Roger Lebel
- Section of Medical Genetics, SUNY Upstate Medical University, Syracuse, NY, 13210, USA
| | - Thuy-Linh Le
- Imagine Institute, INSERM U1163, Paris Cité University, Paris, 75015, France
| | - Jeanne Amiel
- Imagine Institute, INSERM U1163, Paris Cité University, Paris, 75015, France
- Service de Médecine Génomique des Maladies Rares, Hôpital Necker-Enfants Malades, AP-HP, Paris, 75015, France
| | | | - Kaan Boztug
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, 1090, Austria
- Research Centre for Molecular Medicine of the Austrian Academy of Sciences, Vienna, 1090, Austria
- Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, 1090, Austria
- St. Anna Children's Hospital and Children's Cancer Research Institute, Department of Pediatrics, Medical University of Vienna, Vienna, 1090, Austria
| | - Katta M Girisha
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Anju Shukla
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Stephanie L Bielas
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA.
| | - Ashleigh E Schaffer
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA.
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2
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Ruaud L, Roux N, Boutaud L, Bessières B, Ageorges F, Achaiaa A, Bole C, Nitschke P, Masson C, Vekemans M, Verloes A, Attie‐Bitach T. Biallelic
THOC6
pathogenic variants: Prenatal phenotype and review of the literature. Birth Defects Res 2022; 114:499-504. [DOI: 10.1002/bdr2.2011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 03/17/2022] [Accepted: 03/22/2022] [Indexed: 01/20/2023]
Affiliation(s)
- Lyse Ruaud
- INSERM UMR 1141, Neurodiderot Université de Paris Paris France
- Département de Génétique APHp.Nord, Hopital Universitaire Robert‐Debré Paris France
| | - Nathalie Roux
- APHp.Centre, Hopital Necker‐Enfants Malades, Service de Médecine Génomique des Maladies Rares Paris France
- Université de Paris Paris France
| | - Lucile Boutaud
- APHp.Centre, Hopital Necker‐Enfants Malades, Service de Médecine Génomique des Maladies Rares Paris France
- Institut Imagine, INSERM U1163 Paris France
| | - Bettina Bessières
- APHp.Centre, Hopital Necker‐Enfants Malades, Service de Médecine Génomique des Maladies Rares Paris France
| | - Faustine Ageorges
- Département de Génétique APHp.Nord, Hopital Universitaire Robert‐Debré Paris France
| | - Amale Achaiaa
- APHp.Centre, Hopital Necker‐Enfants Malades, Service de Médecine Génomique des Maladies Rares Paris France
| | | | - Patrick Nitschke
- Université de Paris Paris France
- Institut Imagine, Plateforme de Génomique Paris France
| | - Cécile Masson
- Institut Imagine, Plateforme de Génomique Paris France
| | - Michel Vekemans
- APHp.Centre, Hopital Necker‐Enfants Malades, Service de Médecine Génomique des Maladies Rares Paris France
- Université de Paris Paris France
- Institut Imagine, INSERM U1163 Paris France
| | - Alain Verloes
- INSERM UMR 1141, Neurodiderot Université de Paris Paris France
- Département de Génétique APHp.Nord, Hopital Universitaire Robert‐Debré Paris France
| | - Tania Attie‐Bitach
- APHp.Centre, Hopital Necker‐Enfants Malades, Service de Médecine Génomique des Maladies Rares Paris France
- Université de Paris Paris France
- Institut Imagine, INSERM U1163 Paris France
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3
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Apuril Velgara ES, Mariani M, Torella A, Musacchia F, Nigro V, Selicorni A. Cantù syndrome: Report of a patient with a novel variant in KCNJ8 and revision of literature. Am J Med Genet A 2022; 188:1661-1666. [PMID: 35243770 DOI: 10.1002/ajmg.a.62710] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 10/10/2021] [Accepted: 01/28/2022] [Indexed: 01/26/2023]
Abstract
Cantù syndrome (CS) is a rare multisystemic disorder, characterized by congenital hypertrichosis, macrocephaly, facial dysmorphisms, cardiomegaly, vascular, and skeletal anomalies. From the cognitive point of view, most of the patients show a mild speech delay and a few of them present intellectual disability and learning difficulties. To date, most CS-reported cases are caused by heterozygous ABCC9 gene mutations. Only three patients with CS and heterozygous KCNJ8 gene variants have been reported. The authors here present the fourth case of CS with a variant in KCNJ8 in a 6-month-old baby. Diagnosis was reached through Trio-Whole Exome analysis that revealed a de novo missense variant in KCNJ8.
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Affiliation(s)
- Erika Solansh Apuril Velgara
- Department of Pediatric, Mariani Foundation Center for Fragile Child ASST-Lariana, Sant'Anna Hospital, San Fermo della Battaglia (Como), Italy
| | - Milena Mariani
- Department of Pediatric, Mariani Foundation Center for Fragile Child ASST-Lariana, Sant'Anna Hospital, San Fermo della Battaglia (Como), Italy
| | - Annalaura Torella
- Department of Precision Medicine, University "Luigi Vanvitelli", Naples, Italy.,Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | | | | | - Vincenzo Nigro
- Department of Precision Medicine, University "Luigi Vanvitelli", Naples, Italy.,Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - Angelo Selicorni
- Department of Pediatric, Mariani Foundation Center for Fragile Child ASST-Lariana, Sant'Anna Hospital, San Fermo della Battaglia (Como), Italy
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5
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Zhang Q, Chen S, Qin Z, Zheng H, Fan X. The first reported case of Beaulieu-Boycott-Innes syndrome caused by two novel mutations in THOC6 gene in a Chinese infant. Medicine (Baltimore) 2020; 99:e19751. [PMID: 32282736 PMCID: PMC7220430 DOI: 10.1097/md.0000000000019751] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE This case report expands the mutation and phenotypic spectra of Beaulieu-Boycott-Innes syndrome (BBIS), and will be valuable for mutation-based pre- and post-natal screening of BBIS when conducting a genetic diagnosis. PATIENT CONCERNS A 4-year old boy from Guilin City, Guangxi Zhuang Autonomous Region, China, was referred to our clinic for clarification of his diagnosis because he showed moderate intellectual disability. DIAGNOSIS Two novel compound heterozygous mutations of THOC6, c.664T>C (p.Trp222Arg) and c.945+1 G>A were identified in this patient by whole exome sequencing. The two mutations were evaluated as pathogenic and likely pathogenic respectively according to the American College of Medical Genetics guidelines. This is the first case displaying the BBIS phenotype reported in the Chinese population. These two mutations have not been reported previously. INTERVENTIONS Symptomatic treatment and rehabilitation training for patients. OUTCOMES The genetic cause of the disease was identified. The family received scientific genetic counseling. LESSONS BBIS is a rare syndromic autosomal recessive disease with intellectual disability and it is normally difficult for clinicians to recognize it. Whole exome sequencing is an efficient way to identify the gene which causes a particular disease in patients.
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Affiliation(s)
- Qiang Zhang
- Laboratory of Genetic and Metabolism, Department of Paediatric Endocrine and Metabolism, Maternal and Child Health Hospital of Guangxi
| | - Shaoke Chen
- Laboratory of Genetic and Metabolism, Department of Paediatric Endocrine and Metabolism, Maternal and Child Health Hospital of Guangxi
- Department of Pediatrics, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zailong Qin
- Laboratory of Genetic and Metabolism, Department of Paediatric Endocrine and Metabolism, Maternal and Child Health Hospital of Guangxi
| | - Haiyang Zheng
- Laboratory of Genetic and Metabolism, Department of Paediatric Endocrine and Metabolism, Maternal and Child Health Hospital of Guangxi
| | - Xin Fan
- Laboratory of Genetic and Metabolism, Department of Paediatric Endocrine and Metabolism, Maternal and Child Health Hospital of Guangxi
- Department of Pediatrics, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
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6
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Gupta N, Yadav S, Gurramkonda VB, Vl R, Sg T, Kabra M. First report of THOC6 related intellectual disability (Beaulieu Boycott Innes syndrome) in two siblings from India. Eur J Med Genet 2019; 63:103742. [PMID: 31421288 DOI: 10.1016/j.ejmg.2019.103742] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/08/2019] [Accepted: 08/13/2019] [Indexed: 01/02/2023]
Abstract
THOC6 is a newly described causal gene for an autosomal recessive intellectual disability (ID) - Beaulieu Boycott Innes syndrome (BBIS) (OMIM # 613680). It is characterized by ID with dysmorphic facies, genitourinary, cardiac anomalies, and dentition problems. Here, we report the first two siblings of BBIS from the Indian subcontinent with previously unreported skeletal anomalies such as Sprengel shoulder, calcaneo valgus deformity, radioulnar dysostosis, and overlapping toes. Whole exome sequencing (WES) identified previously reported three missense variants (p.Trp100Arg, p.Val234Leu, p.Gly275Asp) in THOC6. THOC6 is a subunit of TRanscription and EXport (TREX) complex involved in mRNA transcription, processing, and nuclear export of spliced mRNAs and has a potential role in neurodevelopment. Till date, only 12 patients with BBIS have been reported. This report reviews the phenotypic and genetic data of known BBIS cases in addition to the new phenotypic features, thereby expanding the phenotype of this rare syndrome.
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Affiliation(s)
- Neerja Gupta
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Genetics, New Delhi, India.
| | - Sakshi Yadav
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Genetics, New Delhi, India
| | - Venkatesh Babu Gurramkonda
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Genetics, New Delhi, India
| | - Ramprasad Vl
- Medgenome Laboratory Private Limited, 3rd Floor, 258/A, Narayana Health City, Hosur Road, Bommasandra, Bengaluru, India
| | - Thenral Sg
- Medgenome Laboratory Private Limited, 3rd Floor, 258/A, Narayana Health City, Hosur Road, Bommasandra, Bengaluru, India
| | - Madhulika Kabra
- Division of Genetics, Department of Pediatrics, All India Institute of Medical Genetics, New Delhi, India
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