1
|
Deconte D, Diniz BL, Hartmann JK, de Souza MA, Zottis LFF, Zen PRG, Rosa RFM, Fiegenbaum M. Expanding the Phenotypic Spectrum of Pathogenic KIAA0586 Variants: From Joubert Syndrome to Hydrolethalus Syndrome. Int J Mol Sci 2024; 25:7900. [PMID: 39063141 PMCID: PMC11277298 DOI: 10.3390/ijms25147900] [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: 04/26/2024] [Revised: 07/08/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024] Open
Abstract
KIAA0586 variants have been associated with a wide range of ciliopathies, mainly Joubert syndrome (JS, OMIM #616490) and short-rib thoracic dysplasia syndrome (SRTD, OMIM #616546). However, the hypothesis that this gene is involved with hydrolethalus syndrome (HSL, OMIM #614120) and orofaciodigital syndrome IV (OMIM #258860) has already been raised. Ciliopathies' clinical features are often overlapped despite differing in phenotype severity. Besides KIAA0586, HYLS1 and KIF7 are also known for being causative of ciliopathies, indicating that all three genes may have similar or converging genomic pathways. Overall, the genotypic and phenotypic spectrum of ciliopathies becomes wider and conflicting while more and more new variants are added to this group of disorders' molecular pot. In this case report we discuss the first Brazilian individual clinically diagnosed with hydrolethalus syndrome and molecular findings that demonstrate the role of KIAA0586 as a causative gene of a group of genetic disorders. Also, recent reports on individuals with intronic and exonic variants combined leading to ciliopathies support our patient's molecular diagnosis. At the same time, we discuss variable expressivity and overlapping features in ciliopathies.
Collapse
Affiliation(s)
- Desirée Deconte
- Programa de Pós-Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil; (D.D.); (B.L.D.)
| | - Bruna Lixinski Diniz
- Programa de Pós-Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil; (D.D.); (B.L.D.)
| | - Jéssica K. Hartmann
- Faculty of Medicine, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil; (J.K.H.); (M.A.d.S.); (L.F.F.Z.)
| | - Mateus A. de Souza
- Faculty of Medicine, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil; (J.K.H.); (M.A.d.S.); (L.F.F.Z.)
| | - Laira F. F. Zottis
- Faculty of Medicine, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil; (J.K.H.); (M.A.d.S.); (L.F.F.Z.)
| | - Paulo Ricardo Gazzola Zen
- Departamento de Clínica Médica, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil; (P.R.G.Z.)
| | - Rafael F. M. Rosa
- Departamento de Clínica Médica, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil; (P.R.G.Z.)
| | - Marilu Fiegenbaum
- Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050-170, Brazil
| |
Collapse
|
2
|
Topa A, Rohlin A, Fehr A, Lovmar L, Stenman G, Tarnow P, Maltese G, Bhatti-Søfteland M, Kölby L. The value of genome-wide analysis in craniosynostosis. Front Genet 2024; 14:1322462. [PMID: 38318288 PMCID: PMC10839781 DOI: 10.3389/fgene.2023.1322462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/19/2023] [Indexed: 02/07/2024] Open
Abstract
Background: This study assessed the diagnostic yield of high-throughput sequencing methods in a cohort of craniosynostosis (CS) patients not presenting causal variants identified through previous targeted analysis. Methods: Whole-genome or whole-exome sequencing (WGS/WES) was performed in a cohort of 59 patients (from 57 families) assessed by retrospective phenotyping as having syndromic or nonsyndromic CS. Results: A syndromic form was identified in 51% of the unrelated cases. A genetic cause was identified in 38% of syndromic cases, with novel variants detected in FGFR2 (a rare Alu insertion), TWIST1, TCF12, KIAA0586, HDAC9, FOXP1, and NSD2. Additionally, we report two patients with rare recurrent variants in KAT6A and YY1 as well as two patients with structural genomic aberrations: one with a 22q13 duplication and one with a complex rearrangement involving chromosome 2 (2p25 duplication including SOX11 and deletion of 2q22). Moreover, we identified potentially relevant variants in 87% of the remaining families with no previously detected causal variants, including novel variants in ADAMTSL4, ASH1L, ATRX, C2CD3, CHD5, ERF, H4C5, IFT122, IFT140, KDM6B, KMT2D, LTBP1, MAP3K7, NOTCH2, NSD1, SOS1, SPRY1, POLR2A, PRRX1, RECQL4, TAB2, TAOK1, TET3, TGFBR1, TCF20, and ZBTB20. Conclusion: These results confirm WGS/WES as a powerful diagnostic tool capable of either targeted in silico or broad genomic analysis depending on phenotypic presentation (e.g., classical or unusual forms of syndromic CS).
Collapse
Affiliation(s)
- Alexandra Topa
- Department of Laboratory Medicine, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
- Department of Clinical Genetics and Genomics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Anna Rohlin
- Department of Laboratory Medicine, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
- Department of Clinical Genetics and Genomics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - André Fehr
- Department of Laboratory Medicine, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
- Department of Pathology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Lovisa Lovmar
- Department of Clinical Genetics and Genomics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Göran Stenman
- Department of Laboratory Medicine, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
- Department of Pathology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Peter Tarnow
- Department of Plastic Surgery, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
| | - Giovanni Maltese
- Department of Plastic Surgery, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
| | - Madiha Bhatti-Søfteland
- Department of Plastic Surgery, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
| | - Lars Kölby
- Department of Plastic Surgery, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
| |
Collapse
|
3
|
Serpieri V, Mortarini G, Loucks H, Biagini T, Micalizzi A, Palmieri I, Dempsey JC, D'Abrusco F, Mazzotta C, Battini R, Bertini ES, Boltshauser E, Borgatti R, Brockmann K, D'Arrigo S, Nardocci N, Fischetto R, Agolini E, Novelli A, Romano A, Romaniello R, Stanzial F, Signorini S, Strisciuglio P, Gana S, Mazza T, Doherty D, Valente EM. Recurrent, founder and hypomorphic variants contribute to the genetic landscape of Joubert syndrome. J Med Genet 2023; 60:885-893. [PMID: 36788019 PMCID: PMC10447400 DOI: 10.1136/jmg-2022-108725] [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: 05/24/2022] [Accepted: 01/08/2023] [Indexed: 02/16/2023]
Abstract
BACKGROUND Joubert syndrome (JS) is a neurodevelopmental ciliopathy characterised by a distinctive mid-hindbrain malformation, the 'molar tooth sign'. Over 40 JS-associated genes are known, accounting for two-thirds of cases. METHODS While most variants are novel or extremely rare, we report on 11 recurring variants in seven genes, including three known 'founder variants' in the Ashkenazi Jewish, Hutterite and Finnish populations. We evaluated variant frequencies in ~550 European patients with JS and compared them with controls (>15 000 Italian plus gnomAD), and with an independent cohort of ~600 JS probands from the USA. RESULTS All variants were markedly enriched in the European JS cohort compared with controls. When comparing allele frequencies in the two JS cohorts, the Ashkenazim founder variant (TMEM216 c.218G>T) was significantly enriched in American compared with European patients with JS, while MKS1 c.1476T>G was about 10 times more frequent among European JS. Frequencies of other variants were comparable in the two cohorts. Genotyping of several markers identified four novel European founder haplotypes.Two recurrent variants (MKS1 c.1476T>G and KIAA0586 c.428delG), have been detected in homozygosity in unaffected individuals, suggesting they could act as hypomorphic variants. However, while fibroblasts from a MKS1 c.1476T>G healthy homozygote showed impaired ability to form primary cilia and mildly reduced ciliary length, ciliary parameters were normal in cells from a KIAA0586 c.428delG healthy homozygote. CONCLUSION This study contributes to understand the complex genetic landscape of JS, explain its variable prevalence in distinct geographical areas and characterise two recurrent hypomorphic variants.
Collapse
Affiliation(s)
| | - Giulia Mortarini
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Hailey Loucks
- Department of Pediatrics, University of Washington, Seattle, Washington, USA
| | - Tommaso Biagini
- Bioinformatics Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, S. Giovanni Rotondo, Foggia, Italy
| | - Alessia Micalizzi
- Laboratory of Medical Genetics, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
| | - Ilaria Palmieri
- Neurogenetics Research Centre, IRCCS Mondino Foundation, Pavia, Italy
| | - Jennifer C Dempsey
- Department of Pediatrics, University of Washington, Seattle, Washington, USA
| | - Fulvio D'Abrusco
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | | | - Roberta Battini
- Department of Neuroscience, IRCCS Stella Maris Foundation, Pisa, Italy
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Enrico Silvio Bertini
- Unit of Neuromuscular and Neurodegenerative Disorders, IRCCS Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Eugen Boltshauser
- Departement of Pediatric Neurology, University Children's Hospital Zürich, Zurich, Switzerland
| | - Renato Borgatti
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- Child Neurology and Psychiatry Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Knut Brockmann
- Interdisciplinary Pediatric Centre for Children with Developmental Disabilities and Severe Chronic Disorders, University Medical Centre, Georg August University, Göttingen, Germany
| | - Stefano D'Arrigo
- Department of Pediatric Neuroscience, Fondazione IRCCS Istituto Neurologico "C Besta", Milan, Italy
| | - Nardo Nardocci
- Department of Pediatric Neuroscience, Fondazione IRCCS Istituto Neurologico "C Besta", Milan, Italy
| | - Rita Fischetto
- Clinical Genetics Unit, Department of Pediatric Medicine, Giovanni XXIII Children's Hospital, Bari, Italy
| | - Emanuele Agolini
- Laboratory of Medical Genetics, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
| | - Antonio Novelli
- Laboratory of Medical Genetics, IRCCS Bambino Gesù Children's Hospital, Rome, Italy
| | - Alfonso Romano
- Section of Pediatrics, Department of Medical Translational Sciences, University of Naples Federico II, Naples, Italy
| | - Romina Romaniello
- Child Neurology and Psychiatry Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Franco Stanzial
- Genetic Counseling Service, Department of Pediatrics, Regional Hospital of Bozen, Bozen, Italy
| | - Sabrina Signorini
- Child Neurology and Psychiatry Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Pietro Strisciuglio
- Section of Pediatrics, Department of Medical Translational Sciences, University of Naples Federico II, Naples, Italy
| | - Simone Gana
- Neurogenetics Research Centre, IRCCS Mondino Foundation, Pavia, Italy
| | - Tommaso Mazza
- Bioinformatics Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, S. Giovanni Rotondo, Foggia, Italy
| | - Dan Doherty
- Department of Pediatrics, University of Washington, Seattle, Washington, USA
| | - Enza Maria Valente
- Neurogenetics Research Centre, IRCCS Mondino Foundation, Pavia, Italy
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
| |
Collapse
|
4
|
Shen Y, Lu C, Cheng T, Cao Z, Chen C, Ma X, Gao H, Luo M. A novel 1.38-kb deletion combined with a single nucleotide variant in KIAA0586 as a cause of Joubert syndrome. BMC Med Genomics 2023; 16:4. [PMID: 36635699 PMCID: PMC9838056 DOI: 10.1186/s12920-023-01438-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 01/10/2023] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND KIAA0586, also known as Talpid3, plays critical roles in primary cilia formation and hedgehog signaling in humans. Variants in KIAA0586 could cause some different ciliopathies, including Joubert syndrome (JBTS), which is a clinically and genetically heterogeneous group of autosomal recessive neurological disorders. METHODS AND RESULTS A 9-month-old girl was diagnosed as JBTS by the "molar tooth sign" of the mid-brain and global developmental delay. By whole-exome sequencing, we identified a single nucleotide variant c.3303G > A and a 1.38-kb deletion in KIAA0586 in the proband. These two variants of KIAA0586 were consistent with the mode of autosomal recessive inheritance in the family, which was verified using Sanger sequencing. CONCLUSIONS This finding of a compound heterozygote with a 1.38-kb deletion and c.3303G > A gave a precise genetic diagnosis for the patient, and the novel 1.38-kb deletion also expanded the pathogenic variation spectrum of JBTS caused by KIAA0586.
Collapse
Affiliation(s)
- Yue Shen
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| | - Chao Lu
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| | - Tingting Cheng
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| | - Zongfu Cao
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| | - Cuixia Chen
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| | - Xu Ma
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| | - Huafang Gao
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| | - Minna Luo
- grid.453135.50000 0004 1769 3691National Human Genetic Resources Center, National Research Institute for Family Planning, Beijing, China
| |
Collapse
|
5
|
Chang KJ, Wu HY, Yarmishyn AA, Li CY, Hsiao YJ, Chi YC, Lo TC, Dai HJ, Yang YC, Liu DH, Hwang DK, Chen SJ, Hsu CC, Kao CL. Genetics behind Cerebral Disease with Ocular Comorbidity: Finding Parallels between the Brain and Eye Molecular Pathology. Int J Mol Sci 2022; 23:ijms23179707. [PMID: 36077104 PMCID: PMC9456058 DOI: 10.3390/ijms23179707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 11/30/2022] Open
Abstract
Cerebral visual impairments (CVIs) is an umbrella term that categorizes miscellaneous visual defects with parallel genetic brain disorders. While the manifestations of CVIs are diverse and ambiguous, molecular diagnostics stand out as a powerful approach for understanding pathomechanisms in CVIs. Nevertheless, the characterization of CVI disease cohorts has been fragmented and lacks integration. By revisiting the genome-wide and phenome-wide association studies (GWAS and PheWAS), we clustered a handful of renowned CVIs into five ontology groups, namely ciliopathies (Joubert syndrome, Bardet–Biedl syndrome, Alstrom syndrome), demyelination diseases (multiple sclerosis, Alexander disease, Pelizaeus–Merzbacher disease), transcriptional deregulation diseases (Mowat–Wilson disease, Pitt–Hopkins disease, Rett syndrome, Cockayne syndrome, X-linked alpha-thalassaemia mental retardation), compromised peroxisome disorders (Zellweger spectrum disorder, Refsum disease), and channelopathies (neuromyelitis optica spectrum disorder), and reviewed several mutation hotspots currently found to be associated with the CVIs. Moreover, we discussed the common manifestations in the brain and the eye, and collated animal study findings to discuss plausible gene editing strategies for future CVI correction.
Collapse
Affiliation(s)
- Kao-Jung Chang
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
| | - Hsin-Yu Wu
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | | | - Cheng-Yi Li
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Yu-Jer Hsiao
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Yi-Chun Chi
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Tzu-Chen Lo
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Ophthalmology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - He-Jhen Dai
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Medical Research, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Yi-Chiang Yang
- Department of Physical Medicine and Rehabilitation, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Ding-Hao Liu
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Physical Medicine and Rehabilitation, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - De-Kuang Hwang
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Shih-Jen Chen
- Department of Ophthalmology, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Chih-Chien Hsu
- School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Ophthalmology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Correspondence: (C.-C.H.); (C.-L.K.); Tel.: +886-2-287-573-25 (C.-C.H.); +886-2-287-573-63 (C.-L.K.)
| | - Chung-Lan Kao
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Department of Physical Medicine and Rehabilitation, Taipei Veterans General Hospital, Taipei 11217, Taiwan
- Department of Physical Medicine and Rehabilitation, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112304, Taiwan
- Center for Intelligent Drug Systems and Smart Bio-Devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
- Correspondence: (C.-C.H.); (C.-L.K.); Tel.: +886-2-287-573-25 (C.-C.H.); +886-2-287-573-63 (C.-L.K.)
| |
Collapse
|
6
|
Gana S, Serpieri V, Valente EM. Genotype-phenotype correlates in Joubert syndrome: A review. AMERICAN JOURNAL OF MEDICAL GENETICS. PART C, SEMINARS IN MEDICAL GENETICS 2022; 190:72-88. [PMID: 35238134 PMCID: PMC9314610 DOI: 10.1002/ajmg.c.31963] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 02/04/2022] [Accepted: 02/15/2022] [Indexed: 01/20/2023]
Abstract
Joubert syndrome (JS) is a genetically heterogeneous primary ciliopathy characterized by a pathognomonic cerebellar and brainstem malformation, the “molar tooth sign,” and variable organ involvement. Over 40 causative genes have been identified to date, explaining up to 94% of cases. To date, gene‐phenotype correlates have been delineated only for a handful of genes, directly translating into improved counseling and clinical care. For instance, JS individuals harboring pathogenic variants in TMEM67 have a significantly higher risk of liver fibrosis, while pathogenic variants in NPHP1, RPGRIP1L, and TMEM237 are frequently associated to JS with renal involvement, requiring a closer monitoring of liver parameters, or renal functioning. On the other hand, individuals with causal variants in the CEP290 or AHI1 need a closer surveillance for retinal dystrophy and, in case of CEP290, also for chronic kidney disease. These examples highlight how an accurate description of the range of clinical symptoms associated with defects in each causative gene, including the rare ones, would better address prognosis and help guiding a personalized management. This review proposes to address this issue by assessing the available literature, to confirm known, as well as to propose rare gene‐phenotype correlates in JS.
Collapse
Affiliation(s)
- Simone Gana
- Neurogenetics Research Center, IRCCS Mondino Foundation, Pavia, Italy
| | | | - Enza Maria Valente
- Neurogenetics Research Center, IRCCS Mondino Foundation, Pavia, Italy.,Department of Molecular Medicine, University of Pavia, Pavia, Italy
| |
Collapse
|
7
|
Delalande JM, Nagy N, McCann CJ, Natarajan D, Cooper JE, Carreno G, Dora D, Campbell A, Laurent N, Kemos P, Thomas S, Alby C, Attié-Bitach T, Lyonnet S, Logan MP, Goldstein AM, Davey MG, Hofstra RMW, Thapar N, Burns AJ. TALPID3/KIAA0586 Regulates Multiple Aspects of Neuromuscular Patterning During Gastrointestinal Development in Animal Models and Human. Front Mol Neurosci 2022; 14:757646. [PMID: 35002618 PMCID: PMC8733242 DOI: 10.3389/fnmol.2021.757646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 11/10/2021] [Indexed: 12/26/2022] Open
Abstract
TALPID3/KIAA0586 is an evolutionary conserved protein, which plays an essential role in protein trafficking. Its role during gastrointestinal (GI) and enteric nervous system (ENS) development has not been studied previously. Here, we analyzed chicken, mouse and human embryonic GI tissues with TALPID3 mutations. The GI tract of TALPID3 chicken embryos was shortened and malformed. Histologically, the gut smooth muscle was mispatterned and enteric neural crest cells were scattered throughout the gut wall. Analysis of the Hedgehog pathway and gut extracellular matrix provided causative reasons for these defects. Interestingly, chicken intra-species grafting experiments and a conditional knockout mouse model showed that ENS formation did not require TALPID3, but was dependent on correct environmental cues. Surprisingly, the lack of TALPID3 in enteric neural crest cells (ENCC) affected smooth muscle and epithelial development in a non-cell-autonomous manner. Analysis of human gut fetal tissues with a KIAA0586 mutation showed strikingly similar findings compared to the animal models demonstrating conservation of TALPID3 and its necessary role in human GI tract development and patterning.
Collapse
Affiliation(s)
- Jean Marie Delalande
- Centre for Immunobiology, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom.,Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Nandor Nagy
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Conor J McCann
- Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Dipa Natarajan
- Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Julie E Cooper
- Developmental Biology and Cancer Program, Birth Defects Research Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - Gabriela Carreno
- Developmental Biology and Cancer Program, Birth Defects Research Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - David Dora
- Department of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary
| | - Alison Campbell
- Department of Paediatric Surgery, Christchurch Hospital, Christchurch, New Zealand
| | - Nicole Laurent
- Génétique et Anomalies du Développement, Université de Bourgogne, Service d'Anatomie Pathologique, Dijon, France
| | - Polychronis Kemos
- Centre for Immunobiology, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Sophie Thomas
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM UMR 1163 Institut Imagine, Paris, France
| | - Caroline Alby
- Department of Genetics, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris (AP-HP), Paris, France
| | - Tania Attié-Bitach
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM UMR 1163 Institut Imagine, Paris, France.,Department of Genetics, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris (AP-HP), Paris, France.,Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Stanislas Lyonnet
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM UMR 1163 Institut Imagine, Paris, France.,Department of Genetics, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris (AP-HP), Paris, France.,Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Malcolm P Logan
- Randall Division of Cell and Molecular Biophysics, King's College London, London, United Kingdom
| | - Allan M Goldstein
- Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Megan G Davey
- Division of Developmental Biology, The Roslin Institute, The University of Edinburgh, Edinburgh, United Kingdom
| | - Robert M W Hofstra
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Nikhil Thapar
- Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, Netherlands
| | - Alan J Burns
- Stem Cells and Regenerative Medicine, Birth Defects Research Centre, UCL Great Ormond Street Institute of Child Health, London, United Kingdom.,Division of Neurogastroenterology and Motility, Department of Gastroenterology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom.,Gastrointestinal Drug Discovery Unit, Takeda Pharmaceuticals International, Inc., Cambridge, MA, United States
| |
Collapse
|
8
|
Bashford AL, Subramanian V. OUP accepted manuscript. Hum Mol Genet 2022; 31:3245-3265. [PMID: 35470378 PMCID: PMC9523558 DOI: 10.1093/hmg/ddac095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 04/18/2022] [Accepted: 04/21/2022] [Indexed: 11/14/2022] Open
Affiliation(s)
- Andrew L Bashford
- Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, UK
| | - Vasanta Subramanian
- To whom correspondence should be addressed. Tel: +44 1225386315; Fax: +44 1225386779;
| |
Collapse
|
9
|
Hammarsjö A, Pettersson M, Chitayat D, Handa A, Anderlid BM, Bartocci M, Basel D, Batkovskyte D, Beleza-Meireles A, Conner P, Eisfeldt J, Girisha KM, Chung BHY, Horemuzova E, Hyodo H, Korņejeva L, Lagerstedt-Robinson K, Lin AE, Magnusson M, Moosa S, Nayak SS, Nilsson D, Ohashi H, Ohashi-Fukuda N, Stranneheim H, Taylan F, Traberg R, Voss U, Wirta V, Nordgren A, Nishimura G, Lindstrand A, Grigelioniene G. High diagnostic yield in skeletal ciliopathies using massively parallel genome sequencing, structural variant screening and RNA analyses. J Hum Genet 2021; 66:995-1008. [PMID: 33875766 PMCID: PMC8472897 DOI: 10.1038/s10038-021-00925-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/31/2021] [Accepted: 03/31/2021] [Indexed: 12/11/2022]
Abstract
Skeletal ciliopathies are a heterogenous group of disorders with overlapping clinical and radiographic features including bone dysplasia and internal abnormalities. To date, pathogenic variants in at least 30 genes, coding for different structural cilia proteins, are reported to cause skeletal ciliopathies. Here, we summarize genetic and phenotypic features of 34 affected individuals from 29 families with skeletal ciliopathies. Molecular diagnostic testing was performed using massively parallel sequencing (MPS) in combination with copy number variant (CNV) analyses and in silico filtering for variants in known skeletal ciliopathy genes. We identified biallelic disease-causing variants in seven genes: DYNC2H1, KIAA0753, WDR19, C2CD3, TTC21B, EVC, and EVC2. Four variants located in non-canonical splice sites of DYNC2H1, EVC, and KIAA0753 led to aberrant splicing that was shown by sequencing of cDNA. Furthermore, CNV analyses showed an intragenic deletion of DYNC2H1 in one individual and a 6.7 Mb de novo deletion on chromosome 1q24q25 in another. In five unsolved cases, MPS was performed in family setting. In one proband we identified a de novo variant in PRKACA and in another we found a homozygous intragenic deletion of IFT74, removing the first coding exon and leading to expression of a shorter message predicted to result in loss of 40 amino acids at the N-terminus. These findings establish IFT74 as a new skeletal ciliopathy gene. In conclusion, combined single nucleotide variant, CNV and cDNA analyses lead to a high yield of genetic diagnoses (90%) in a cohort of patients with skeletal ciliopathies.
Collapse
Affiliation(s)
- Anna Hammarsjö
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden.
| | - Maria Pettersson
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - David Chitayat
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, and Mt. Sinai Hospital, Toronto, ON, Canada.,The Prenatal Diagnosis and Medical Genetics Program, Department of Obstetrics and Gynecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
| | - Atsuhiko Handa
- Department of Radiology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Britt-Marie Anderlid
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Marco Bartocci
- Department of Women's and Children's Health, Neonatology, Karolinska Institutet, Stockholm, Sweden
| | - Donald Basel
- Division of Medical Genetics, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Dominyka Batkovskyte
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Ana Beleza-Meireles
- Department of Clinical Genetics, University Hospitals Bristol and Weston NHS Foundation Trust, Bristol, UK
| | - Peter Conner
- Department of Women's and Children's Health, Karolinska Institutet and Center for Fetal Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Jesper Eisfeldt
- Science for Life Laboratory, Department of Molecular Medicine and Surgery, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Katta M Girisha
- Department of Medical Genetics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Brian Hon-Yin Chung
- Department of Pediatrics and Adolescent Medicine, The University of Hong Kong and Shenzhen Hospital, Futian District, Shenzhen, China.,Department of Pediatrics and Adolescent Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Eva Horemuzova
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Women's and Children's Health, Karolinska Institutet and Paediatric Endocrinology Unit, Karolinska University Hospital, Stockholm, Sweden
| | - Hironobu Hyodo
- Department of Obstetrics and Gynecology, Tokyo Metropolitan Bokutoh Hospital, Kotobashi, Sumida-ku, Tokyo, Japan
| | - Liene Korņejeva
- Department of Prenatal Diagnostics, Riga Maternity Hospital, Riga, Latvia
| | - Kristina Lagerstedt-Robinson
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Angela E Lin
- Medical Genetics, MassGeneral Hospital for Children, Boston, MA, USA
| | - Måns Magnusson
- Department of Molecular Medicine and Surgery, Karolinska Institutet, and Centre for Inherited Metabolic Diseases, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden.,Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Shahida Moosa
- Medical Genetics, Tygerberg Hospital and Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Shalini S Nayak
- Department of Medical Genetics, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, India
| | - Daniel Nilsson
- Science for Life Laboratory, Department of Molecular Medicine and Surgery, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Hirofumi Ohashi
- Division of Medical Genetics, Saitama Children's Medical Center, Saitama, Japan
| | - Naoko Ohashi-Fukuda
- Department of Obstetrics and Gynecology, Tokyo Metropolitan Bokutoh Hospital, Kotobashi, Sumida-ku, Tokyo, Japan
| | - Henrik Stranneheim
- Department of Molecular Medicine and Surgery, Karolinska Institutet, and Centre for Inherited Metabolic Diseases, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden.,Department of Microbiology, Tumor and Cell biology, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - Fulya Taylan
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Rasa Traberg
- Department of Genetics and Molecular Medicine, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Ulrika Voss
- Department of Pediatric Radiology, Karolinska University Hospital, Stockholm, Sweden
| | - Valtteri Wirta
- Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden.,Department of Microbiology, Tumor and Cell biology, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - Ann Nordgren
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Gen Nishimura
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Pediatric Imaging, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Anna Lindstrand
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| | - Giedre Grigelioniene
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, and Department of Clinical Genetics, Karolinska University Laboratory, Karolinska University Hospital, Stockholm, Sweden
| |
Collapse
|
10
|
Powell L, Barroso-Gil M, Clowry GJ, Devlin LA, Molinari E, Ramsbottom SA, Miles CG, Sayer JA. Expression patterns of ciliopathy genes ARL3 and CEP120 reveal roles in multisystem development. BMC DEVELOPMENTAL BIOLOGY 2020; 20:26. [PMID: 33297941 PMCID: PMC7727171 DOI: 10.1186/s12861-020-00231-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 11/11/2020] [Indexed: 11/10/2022]
Abstract
BACKGROUND Joubert syndrome and related disorders (JSRD) and Jeune syndrome are multisystem ciliopathy disorders with overlapping phenotypes. There are a growing number of genetic causes for these rare syndromes, including the recently described genes ARL3 and CEP120. METHODS We sought to explore the developmental expression patterns of ARL3 and CEP120 in humans to gain additional understanding of these genetic conditions. We used an RNA in situ detection technique called RNAscope to characterise ARL3 and CEP120 expression patterns in human embryos and foetuses in collaboration with the MRC-Wellcome Trust Human Developmental Biology Resource. RESULTS Both ARL3 and CEP120 are expressed in early human brain development, including the cerebellum and in the developing retina and kidney, consistent with the clinical phenotypes seen with pathogenic variants in these genes. CONCLUSIONS This study provides insights into the potential pathogenesis of JSRD by uncovering the spatial expression of two JSRD-causative genes during normal human development.
Collapse
Affiliation(s)
- L Powell
- Translational and Clinical Research Institute, Newcastle University, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - M Barroso-Gil
- Translational and Clinical Research Institute, Newcastle University, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - G J Clowry
- Biosciences Institute, Newcastle University, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK
| | - L A Devlin
- Translational and Clinical Research Institute, Newcastle University, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - E Molinari
- Translational and Clinical Research Institute, Newcastle University, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - S A Ramsbottom
- Translational and Clinical Research Institute, Newcastle University, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - C G Miles
- Translational and Clinical Research Institute, Newcastle University, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - J A Sayer
- Translational and Clinical Research Institute, Newcastle University, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK.
- The Newcastle Hospitals NHS Foundation Trust, Freeman Road, Newcastle upon Tyne, NE7 7DN, UK.
- National Institute for Health Research Newcastle Biomedical Research Centre, Newcastle upon Tyne, NE4 5PL, UK.
| |
Collapse
|
11
|
Sumathipala D, Strømme P, Gilissen C, Einarsen IH, Bjørndalen HJ, Server A, Corominas J, Hassel B, Fannemel M, Misceo D, Frengen E. Sudden death in epilepsy and ectopic neurohypophysis in Joubert syndrome 23 diagnosed using SNVs/indels and structural variants pipelines on WGS data: a case report. BMC MEDICAL GENETICS 2020; 21:96. [PMID: 32381069 PMCID: PMC7204034 DOI: 10.1186/s12881-020-01024-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 04/12/2020] [Indexed: 02/06/2023]
Abstract
Background Joubert syndrome (JBTS) is a genetically heterogeneous group of neurodevelopmental syndromes caused by primary cilia dysfunction. Usually the neurological presentation starts with abnormal neonatal breathing followed by muscular hypotonia, psychomotor delay, and cerebellar ataxia. Cerebral MRI shows mid- and hindbrain anomalies including the molar tooth sign. We report a male patient with atypical presentation of Joubert syndrome type 23, thus expanding the phenotype. Case presentation Clinical features were consistent with JBTS already from infancy, yet the syndrome was not suspected before cerebral MRI later in childhood showed the characteristic molar tooth sign and ectopic neurohypophysis. From age 11 years seizures developed and after few years became increasingly difficult to treat, also related to inadequate compliance to therapy. He died at 23 years of sudden unexpected death in epilepsy (SUDEP). The genetic diagnosis remained elusive for many years, despite extensive genetic testing. We reached the genetic diagnosis by performing whole genome sequencing of the family trio and analyzing the data with the combination of one analysis pipeline for single nucleotide variants (SNVs)/indels and one for structural variants (SVs). This lead to the identification of the most common variant detected in patients with JBTS23 (OMIM# 616490), rs534542684, in compound heterozygosity with a 8.3 kb deletion in KIAA0586, not previously reported. Conclusions We describe for the first time ectopic neurohypophysis and SUDEP in JBTS23, expanding the phenotype of this condition and raising the attention on the possible severity of the epilepsy in this disease. We also highlight the diagnostic power of WGS, which efficiently detects SNVs/indels and in addition allows the identification of SVs.
Collapse
Affiliation(s)
- Dulika Sumathipala
- Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Petter Strømme
- Division of Pediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | | | - Ingunn Holm Einarsen
- Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Hilde J Bjørndalen
- Division of Pediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - Andrés Server
- Section of Neuroradiology, Department of Radiology and Nuclear Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Jordi Corominas
- Department of Human Genetics, Radboud UMC, Nijmegen, The Netherlands
| | - Bjørnar Hassel
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Neurohabilitation and Complex Neurology, Oslo University Hospital, Ullevål, Oslo, Norway
| | - Madeleine Fannemel
- Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Doriana Misceo
- Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway.
| | - Eirik Frengen
- Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| |
Collapse
|
12
|
TALPID3 and ANKRD26 selectively orchestrate FBF1 localization and cilia gating. Nat Commun 2020; 11:2196. [PMID: 32366837 PMCID: PMC7198521 DOI: 10.1038/s41467-020-16042-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 04/10/2020] [Indexed: 12/19/2022] Open
Abstract
Transition fibers (TFs) regulate cilia gating and make the primary cilium a distinct functional entity. However, molecular insights into the biogenesis of a functional cilia gate remain elusive. In a forward genetic screen in Caenorhabditis elegans, we uncover that TALP-3, a homolog of the Joubert syndrome protein TALPID3, is a TF-associated component. Genetic analysis reveals that TALP-3 coordinates with ANKR-26, the homolog of ANKRD26, to orchestrate proper cilia gating. Mechanistically, TALP-3 and ANKR-26 form a complex with key gating component DYF-19, the homolog of FBF1. Co-depletion of TALP-3 and ANKR-26 specifically impairs the recruitment of DYF-19 to TFs. Interestingly, in mammalian cells, TALPID3 and ANKRD26 also play a conserved role in coordinating the recruitment of FBF1 to TFs. We thus report a conserved protein module that specifically regulates the functional component of the ciliary gate and suggest a correlation between defective gating and ciliopathy pathogenesis. Most cells possess sensory cilia, which need to be gated properly. Here the authors show that the C. elegans proteins TALP-3 and ANKR-26 coordinate cilia gating in the context of transition fibers and that this mechanism is conserved in mammalian cells and likely implicated in certain ciliopathies.
Collapse
|
13
|
Cocciadiferro D, Agolini E, Digilio MC, Sinibaldi L, Castori M, Silvestri E, Dotta A, Dallapiccola B, Novelli A. The splice c.1815G>A variant in KIAA0586 results in a phenotype bridging short-rib-polydactyly and oral-facial-digital syndrome: A case report and literature review. Medicine (Baltimore) 2020; 99:e19169. [PMID: 32080096 PMCID: PMC7034684 DOI: 10.1097/md.0000000000019169] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION KIAA0586 variants have been associated to short-rib thoracic dysplasia, an autosomal recessive skeletal ciliopathy characterized by a narrow thorax, short limbs, and radiological skeletal abnormalities. PATIENT CONCERNS Patients 1 and 2 were two Roma Gypsy siblings presenting thoracic dysplasia and a combination of oral cavity anomalies. DIAGNOSIS A custom NGS gene panel, including genes associated to skeletal ciliopathies, identified the homozygous KIAA0586 splicing variant c.1815G>A (p.Gln605Gln) in both siblings, confirming the clinical diagnosis of short-rib-polydactyly. INTERVENTION Patients were transferred to neonatal intensive care unit and received life-support treatment. OUTCOMES Patients 1 and 2 died after few hours and 1 month of birth, respectively, because of respiratory failure related with the disease. CONCLUSION We report two patients affected by short-rib polydactyly syndrome and overlapping phenotype with oral-facial-digital syndrome associated with the c.1815G>A variant in KIAA0586, suggesting a quite peculiar genotype-phenotype correlation.
Collapse
Affiliation(s)
| | | | | | - Lorenzo Sinibaldi
- Medical Genetics, Department of Pediatrics, Ospedale Pediatrico Bambino Gesù, Rome
| | - Marco Castori
- Division of Medical Genetics, Fondazione IRCCS-Casa Sollievo della Sofferenza, San Giovanni Rotondo (Foggia)
| | - Evelina Silvestri
- Division of Pathology, Unit of Fetal and Neonatal Pathology, San Camillo-Forlanini Hospital
| | - Andrea Dotta
- Department of Medical and Surgical Neonatology, Bambino Gesù Children's Hospital
| | - Bruno Dallapiccola
- Department of Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | | |
Collapse
|
14
|
Powell L, Samarakoon YH, Ismail S, Sayer JA. ARL3, a small GTPase with a functionally conserved role in primary cilia and immune synapses. Small GTPases 2019; 12:167-176. [PMID: 31826708 DOI: 10.1080/21541248.2019.1703466] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The primary cilium and the immunological synapse are both specialized functional plasma membrane domains that share several similarities. Signalling output of membrane domains is regulated, spatially and temporally, by segregating and focusing lipids and proteins. ARL3, a small GTPase, plays a major role in concentrating lipid-modified proteins in both the immunological synapse and the primary cilia. Here in this review we will introduce the role of ARL3 in health and disease and its role in polarizing signalling at the primary cilia and immunological synapses.
Collapse
Affiliation(s)
- Laura Powell
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Newcastle upon Tyne, UK
| | - Youhani H Samarakoon
- Spatial segregation of signalling Lab, Beatson Institute for Cancer Research, Glasgow, UK.,Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Shehab Ismail
- Spatial segregation of signalling Lab, Beatson Institute for Cancer Research, Glasgow, UK.,Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - John A Sayer
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Newcastle upon Tyne, UK.,Renal Services, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK.,NIHR Newcastle Biomedical Research Centre, Newcastle upon Tyne, UK
| |
Collapse
|
15
|
Bachmann-Gagescu R, Dempsey JC, Bulgheroni S, Chen ML, D'Arrigo S, Glass IA, Heller T, Héon E, Hildebrandt F, Joshi N, Knutzen D, Kroes HY, Mack SH, Nuovo S, Parisi MA, Snow J, Summers AC, Symons JM, Zein WM, Boltshauser E, Sayer JA, Gunay-Aygun M, Valente EM, Doherty D. Healthcare recommendations for Joubert syndrome. Am J Med Genet A 2019; 182:229-249. [PMID: 31710777 DOI: 10.1002/ajmg.a.61399] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/02/2019] [Accepted: 10/09/2019] [Indexed: 12/19/2022]
Abstract
Joubert syndrome (JS) is a recessive neurodevelopmental disorder defined by a characteristic cerebellar and brainstem malformation recognizable on axial brain magnetic resonance imaging as the "Molar Tooth Sign". Although defined by the neurological features, JS is associated with clinical features affecting many other organ systems, particularly progressive involvement of the retina, kidney, and liver. JS is a rare condition; therefore, many affected individuals may not have easy access to subspecialty providers familiar with JS (e.g., geneticists, neurologists, developmental pediatricians, ophthalmologists, nephrologists, hepatologists, psychiatrists, therapists, and educators). Expert recommendations can enable practitioners of all types to provide quality care to individuals with JS and know when to refer for subspecialty care. This need will only increase as precision treatments targeting specific genetic causes of JS emerge. The goal of these recommendations is to provide a resource for general practitioners, subspecialists, and families to maximize the health of individuals with JS throughout the lifespan.
Collapse
Affiliation(s)
- Ruxandra Bachmann-Gagescu
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.,Institute of Medical Genetics, University of Zurich, Schlieren, Switzerland
| | - Jennifer C Dempsey
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington
| | - Sara Bulgheroni
- Developmental Neurology Division, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Maida L Chen
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington.,Division of Pulmonary and Sleep Medicine, Seattle Children's Hospital, Seattle, Washington
| | - Stefano D'Arrigo
- Developmental Neurology Division, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Ian A Glass
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington
| | - Theo Heller
- Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
| | - Elise Héon
- Department of Surgery, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Ophthalmology and Vision Science, University of Toronto, Toronto, Ontario, Canada
| | - Friedhelm Hildebrandt
- Department of Pediatrics, Harvard Medical School, Boston, Massachusetts.,Division of Nephrology, Boston Children's Hospital, Boston, Massachusetts
| | - Nirmal Joshi
- Department of Anesthesia, Deaconess Hospital, Evansville, Indiana.,Anesthesia Dynamics, LLC, Evansville, Indiana
| | - Dana Knutzen
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas.,The Children's Hospital of San Antonio, San Antonio, Texas
| | - Hester Y Kroes
- Department of Medical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Stephen H Mack
- Joubert Syndrome and Related Disorders Foundation, Petaluma, California
| | - Sara Nuovo
- Neurogenetics Lab, IRCCS Santa Lucia Foundation, Rome, Italy.,Department of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Melissa A Parisi
- Intellectual and Developmental Disabilities Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
| | - Joseph Snow
- Office of the Clinical Director, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland
| | - Angela C Summers
- Office of the Clinical Director, National Institute of Mental Health, National Institutes of Health, Bethesda, Maryland.,Department of Psychology, Fordham University, Bronx, New York
| | - Jordan M Symons
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington.,Division of Nephrology, Seattle Children's Hospital, Seattle, Washington
| | - Wadih M Zein
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - Eugen Boltshauser
- Department of Pediatric Neurology (emeritus), Children's University Hospital, Zürich, Switzerland
| | - John A Sayer
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK.,Renal Services, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK.,NIHR Newcastle Biomedical Research Centre, Newcastle upon Tyne, UK
| | - Meral Gunay-Aygun
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Department of Pediatrics and McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Enza Maria Valente
- Neurogenetics Lab, IRCCS Santa Lucia Foundation, Rome, Italy.,Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Dan Doherty
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington.,Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, Washington
| |
Collapse
|
16
|
Parisi MA. The molecular genetics of Joubert syndrome and related ciliopathies: The challenges of genetic and phenotypic heterogeneity. ACTA ACUST UNITED AC 2019; 4:25-49. [PMID: 31763177 PMCID: PMC6864416 DOI: 10.3233/trd-190041] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Joubert syndrome (JS; MIM PS213300) is a rare, typically autosomal recessive disorder characterized by cerebellar vermis hypoplasia and a distinctive malformation of the cerebellum and brainstem identified as the “molar tooth sign” on brain MRI. Other universal features include hypotonia with later ataxia and intellectual disability/developmental delay, with additional features consisting of oculomotor apraxia and abnormal respiratory pattern. Notably, other, more variable features include renal cystic disease, typically nephronophthisis, retinal dystrophy, and congenital hepatic fibrosis; skeletal changes such as polydactyly and findings consistent with short-rib skeletal dysplasias are also seen in many subjects. These pleiotropic features are typical of a number of disorders of the primary cilium, and make the identification of causal genes challenging given the significant overlap between JS and other ciliopathy conditions such as nephronophthisis and Meckel, Bardet-Biedl, and COACH syndromes. This review will describe the features of JS, characterize the 35 known genes associated with the condition, and describe some of the genetic conundrums of JS, such as the heterogeneity of founder effects, lack of genotype-phenotype correlations, and role of genetic modifiers. Finally, aspects of JS and related ciliopathies that may pave the way for development of therapeutic interventions, including gene therapy, will be described.
Collapse
Affiliation(s)
- Melissa A Parisi
- Chief, Intellectual & Developmental Disabilities Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health (NIH), Bethesda, MD, USA
| |
Collapse
|
17
|
Nicoli ER, Weston MR, Hackbarth M, Becerril A, Larson A, Zein WM, Baker PR, Burke JD, Dorward H, Davids M, Huang Y, Adams DR, Zerfas PM, Chen D, Markello TC, Toro C, Wood T, Elliott G, Vu M, Zheng W, Garrett LJ, Tifft CJ, Gahl WA, Day-Salvatore DL, Mindell JA, Malicdan MCV, Acosta MT, Adams DR, Agrawal P, Alejandro ME, Allard P, Alvey J, Andrews A, Ashley EA, Azamian MS, Bacino CA, Bademci G, Baker E, Balasubramanyam A, Baldridge D, Bale J, Barbouth D, Batzli GF, Bayrak-Toydemir P, Beggs AH, Bejerano G, Bellen HJ, Bernstein JA, Berry GT, Bican A, Bick DP, Birch CL, Bivona S, Bohnsack J, Bonnenmann C, Bonner D, Boone BE, Bostwick BL, Botto L, Briere LC, Brokamp E, Brown DM, Brush M, Burke EA, Burrage LC, Butte MJ, Carey J, Carrasquillo O, Chang TCP, Chao HT, Clark GD, Coakley TR, Cobban LA, Cogan JD, Cole FS, Colley HA, Cooper CM, Cope H, Craigen WJ, D'Souza P, Dasari S, Davids M, Dayal JG, Dell'Angelica EC, Dhar SU, Dorrani N, Dorset DC, Douine ED, Draper DD, Duncan L, Eckstein DJ, Emrick LT, Eng CM, Esteves C, Estwick T, Fernandez L, Ferreira C, Fieg EL, Fisher PG, Fogel BL, Forghani I, Fresard L, Gahl WA, Godfrey RA, Goldman AM, Goldstein DB, Gourdine JPF, Grajewski A, Groden CA, Gropman AL, Haendel M, Hamid R, Hanchard NA, Hayes N, High F, Holm IA, Hom J, Huang A, Huang Y, Isasi R, Jamal F, Jiang YH, Johnston JM, Jones AL, Karaviti L, Kelley EG, Kiley D, Koeller DM, Kohane IS, Kohler JN, Krakow D, Krasnewich DM, Korrick S, Koziura M, Krier JB, Kyle JE, Lalani SR, Lam B, Lanpher BC, Lanza IR, Lau CC, Lazar J, LeBlanc K, Lee BH, Lee H, Levitt R, Levy SE, Lewis RA, Lincoln SA, Liu P, Liu XZ, Longo N, Loo SK, Loscalzo J, Maas RL, Macnamara EF, MacRae CA, Maduro VV, Majcherska MM, Malicdan MCV, Mamounas LA, Manolio TA, Mao R, Markello TC, Marom R, Marth G, Martin BA, Martin MG, Martínez-Agosto JA, Marwaha S, May T, McCauley J, McConkie-Rosell A, McCormack CE, McCray AT, Metz TO, Might M, Morava-Kozicz E, Moretti PM, Morimoto M, Mulvihill JJ, Murdock DR, Nath A, Nelson SF, Newberry JS, Newman JH, Nicholas SK, Novacic D, Oglesbee D, Orengo JP, Pace L, Pak S, Pallais JC, Palmer CG, Papp JC, Parker NH, Phillips JA, Posey JE, Postlethwait JH, Potocki L, Pusey BN, Quinlan A, Raja AN, Renteria G, Reuter CM, Rives L, Robertson AK, Rodan LH, Rosenfeld JA, Rowley RK, Ruzhnikov M, Sacco R, Sampson JB, Samson SL, Saporta M, Schaechter J, Schedl T, Schoch K, Scott DA, Shakachite L, Sharma P, Shashi V, Shields K, Shin J, Signer R, Sillari CH, Silverman EK, Sinsheimer JS, Sisco K, Smith KS, Solnica-Krezel L, Spillmann RC, Stoler JM, Stong N, Sullivan JA, Sutton S, Sweetser DA, Tabor HK, Tamburro CP, Tan QKG, Tekin M, Telischi F, Thorson W, Tifft CJ, Toro C, Tran AA, Urv TK, Velinder M, Viskochil D, Vogel TP, Wahl CE, Walley NM, Walsh CA, Walker M, Wambach J, Wan J, Wang LK, Wangler MF, Ward PA, Waters KM, Webb-Robertson BJM, Wegner D, Westerfield M, Wheeler MT, Wise AL, Wolfe LA, Woods JD, Worthey EA, Yamamoto S, Yang J, Yoon AJ, Yu G, Zastrow DB, Zhao C, Zuchner S. Lysosomal Storage and Albinism Due to Effects of a De Novo CLCN7 Variant on Lysosomal Acidification. Am J Hum Genet 2019; 104:1127-1138. [PMID: 31155284 PMCID: PMC6562152 DOI: 10.1016/j.ajhg.2019.04.008] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/10/2019] [Indexed: 12/15/2022] Open
Abstract
Optimal lysosome function requires maintenance of an acidic pH maintained by proton pumps in combination with a counterion transporter such as the Cl-/H+ exchanger, CLCN7 (ClC-7), encoded by CLCN7. The role of ClC-7 in maintaining lysosomal pH has been controversial. In this paper, we performed clinical and genetic evaluations of two children of different ethnicities. Both children had delayed myelination and development, organomegaly, and hypopigmentation, but neither had osteopetrosis. Whole-exome and -genome sequencing revealed a de novo c.2144A>G variant in CLCN7 in both affected children. This p.Tyr715Cys variant, located in the C-terminal domain of ClC-7, resulted in increased outward currents when it was heterologously expressed in Xenopus oocytes. Fibroblasts from probands displayed a lysosomal pH approximately 0.2 units lower than that of control cells, and treatment with chloroquine normalized the pH. Primary fibroblasts from both probands also exhibited markedly enlarged intracellular vacuoles; this finding was recapitulated by the overexpression of human p.Tyr715Cys CLCN7 in control fibroblasts, reflecting the dominant, gain-of-function nature of the variant. A mouse harboring the knock-in Clcn7 variant exhibited hypopigmentation, hepatomegaly resulting from abnormal storage, and enlarged vacuoles in cultured fibroblasts. Our results show that p.Tyr715Cys is a gain-of-function CLCN7 variant associated with developmental delay, organomegaly, and hypopigmentation resulting from lysosomal hyperacidity, abnormal storage, and enlarged intracellular vacuoles. Our data supports the hypothesis that the ClC-7 antiporter plays a critical role in maintaining lysosomal pH.
Collapse
|
18
|
Fraser AM, Davey MG. TALPID3 in Joubert syndrome and related ciliopathy disorders. Curr Opin Genet Dev 2019; 56:41-48. [DOI: 10.1016/j.gde.2019.06.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 05/27/2019] [Accepted: 06/16/2019] [Indexed: 12/18/2022]
|
19
|
Bashford AL, Subramanian V. Mice with a conditional deletion of Talpid3 (KIAA0586) - a model for Joubert syndrome. J Pathol 2019; 248:396-408. [PMID: 30924151 PMCID: PMC6767539 DOI: 10.1002/path.5271] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 03/07/2019] [Accepted: 03/26/2019] [Indexed: 12/14/2022]
Abstract
Joubert syndrome (JS) is a ciliopathy associated with mutations in numerous genes encoding cilia components. TALPID3 encoded by KIAA0856 in man (2700049A03Rik in mouse) is a centrosomal protein essential for the assembly of primary cilia. Mutations in KIAA0856 have been recently identified in JS patients. Herein, we describe a novel mouse JS model with a conditional deletion of the conserved exons 11–12 of Talpid3 in the central nervous system which recapitulates the complete cerebellar phenotype seen in JS. Talpid3 mutant mice exhibit key hallmarks of JS including progressive ataxia, severely hypoplastic cerebellar hemispheres and vermis, together with abnormal decussation of the superior cerebellar peduncles. The Purkinje cell layer is disorganised with abnormal dendritic arborisation. The external granule layer (EGL) is thinner, lacks primary cilia, and has a reduced level of proliferation. Furthermore, we describe novel cellular defects including ectopic clusters of mature granule neurons, and abnormal parallel fibre‐derived synapses and disorientation of cells in the EGL. The defective glial scaffold results in abnormal granule cell migration which manifests as ectopic clusters of granule neurons. In addition, we show a reduction in Wnt7a expression suggesting that defects may arise not only from deficiencies in the Hedgehog (Hh) pathway but also due to the additional roles of Talpid3. The Talpid3 conditional knockout mouse is a novel JS model which fully recapitulates the JS cerebellar phenotype. These findings reveal a role for Talpid3 in granule precursor cell migration in the cerebellum (either direct or indirect) which together with defective Hh signalling underlies the JS phenotype. Our findings also illustrate the utility of creating conditional mouse models to assist in unravelling the molecular and cellular mechanisms underlying JS. © 2019 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
Collapse
Affiliation(s)
- Andrew L Bashford
- Department of Biology and Biochemistry, University of Bath, Bath, UK
| | | |
Collapse
|
20
|
Tsai JJ, Hsu WB, Liu JH, Chang CW, Tang TK. CEP120 interacts with C2CD3 and Talpid3 and is required for centriole appendage assembly and ciliogenesis. Sci Rep 2019; 9:6037. [PMID: 30988386 PMCID: PMC6465297 DOI: 10.1038/s41598-019-42577-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 04/03/2019] [Indexed: 12/19/2022] Open
Abstract
Centrosomal protein 120 (CEP120) was originally identified as a daughter centriole-enriched protein that participates in centriole elongation. Recent studies showed that CEP120 gene mutations cause complex ciliopathy phenotypes in humans, including Joubert syndrome and Jeune asphyxiating thoracic dystrophy, suggesting that CEP120 plays an additional role in ciliogenesis. To investigate the potential roles of CEP120 in centriole elongation and cilia formation, we knocked out the CEP120 gene in p53-deficient RPE1 cells using the CRISPR/Cas9 editing system, and performed various analyses. We herein report that loss of CEP120 produces short centrioles with no apparent distal and subdistal appendages. CEP120 knockout was also associated with defective centriole elongation, impaired recruitment of C2CD3 and Talpid3 to the distal ends of centrioles, and consequent defects in centriole appendage assembly and cilia formation. Interestingly, wild-type CEP120 interacts with C2CD3 and Talpid3, whereas a disease-associated CEP120 mutant (I975S) has a low affinity for C2CD3 binding and perturbs cilia assembly. Together, our findings reveal a novel role of CEP120 in ciliogenesis by showing that it interacts with C2CD3 and Talpid3 to assemble centriole appendages and by illuminating the molecular mechanism through which the CEP120 (I975S) mutation causes complex ciliopathies.
Collapse
Affiliation(s)
- Jhih-Jie Tsai
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Wen-Bin Hsu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Jia-Hua Liu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Ching-Wen Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Tang K Tang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
| |
Collapse
|
21
|
Ott T, Kaufmann L, Granzow M, Hinderhofer K, Bartram CR, Theiß S, Seitz A, Paramasivam N, Schulz A, Moog U, Blum M, Evers CM. The Frog Xenopus as a Model to Study Joubert Syndrome: The Case of a Human Patient With Compound Heterozygous Variants in PIBF1. Front Physiol 2019; 10:134. [PMID: 30858804 PMCID: PMC6397843 DOI: 10.3389/fphys.2019.00134] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 02/04/2019] [Indexed: 12/16/2022] Open
Abstract
Joubert syndrome (JS) is a congenital autosomal-recessive or—in rare cases–X-linked inherited disease. The diagnostic hallmark of the so-called molar tooth sign describes the morphological manifestation of the mid- and hind-brain in axial brain scans. Affected individuals show delayed development, intellectual disability, ataxia, hyperpnea, sleep apnea, abnormal eye, and tongue movements as well as hypotonia. At the cellular level, JS is associated with the compromised biogenesis of sensory cilia, which identifies JS as a member of the large group of ciliopathies. Here we report on the identification of novel compound heterozygous variants (p.Y503C and p.Q485*) in the centrosomal gene PIBF1 in a patient with JS via trio whole exome sequencing. We have studied the underlying disease mechanism in the frog Xenopus, which offers fast assessment of cilia functions in a number of embryological contexts. Morpholino oligomer (MO) mediated knockdown of the orthologous Xenopus pibf1 gene resulted in defective mucociliary clearance in the larval epidermis, due to reduced cilia numbers and motility on multiciliated cells. To functionally assess patient alleles, mutations were analyzed in the larval skin: the p.Q485* nonsense mutation resulted in a disturbed localization of PIBF1 to the ciliary base. This mutant failed to rescue the ciliation phenotype following knockdown of endogenous pibf1. In contrast, the missense variant p.Y503C resulted in attenuated rescue capacity compared to the wild type allele. Based on these results, we conclude that in the case of this patient, JS is the result of a pathogenic combination of an amorphic and a hypomorphic PIBF1 allele. Our study underscores the versatility of the Xenopus model to study ciliopathies such as JS in a rapid and cost-effective manner, which should render this animal model attractive for future studies of human ciliopathies.
Collapse
Affiliation(s)
- Tim Ott
- Institute of Zoology, University of Hohenheim, Stuttgart, Germany
| | - Lilian Kaufmann
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Martin Granzow
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | | | - Claus R Bartram
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Susanne Theiß
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Angelika Seitz
- Department of Neuroradiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Nagarajan Paramasivam
- Medical Faculty Heidelberg, Heidelberg University, Heidelberg, Germany.,Division of Theoretical Bioinformatics, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Angela Schulz
- Genomics & Proteomics Core Facility, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Ute Moog
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Martin Blum
- Institute of Zoology, University of Hohenheim, Stuttgart, Germany
| | - Christina M Evers
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| |
Collapse
|
22
|
Review of Ocular Manifestations of Joubert Syndrome. Genes (Basel) 2018; 9:genes9120605. [PMID: 30518138 PMCID: PMC6315342 DOI: 10.3390/genes9120605] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 11/13/2018] [Accepted: 11/27/2018] [Indexed: 12/13/2022] Open
Abstract
Joubert syndrome is a group of rare disorders that stem from defects in a sensory organelle, the primary cilia. Affected patients often present with disorders involving multiple organ systems, including the brain, eyes, and kidneys. Common symptoms include breathing abnormalities, mental developmental delays, loss of voluntary muscle coordination, and abnormal eye movements, with a diagnostic “molar tooth” sign observed by magnetic resonance imaging (MRI) of the midbrain. We reviewed the ocular phenotypes that can be found in patients with Joubert syndrome. Ocular motor apraxia is the most frequent (80% of patients), followed by strabismus (74%) and nystagmus (72%). A minority of patients also present with ptosis (43%), chorioretinal coloboma (30%), and optic nerve atrophy (22%). Although mutations in 34 genes have been found to be associated with Joubert syndrome, retinal degeneration has been reported in only 38% of patients. Mutations in AHI1 and CEP290, genes critical to primary cilia function, have been linked to retinal degeneration. In conclusion, Joubert syndrome is a rare pleiotropic group of disorders with variable ocular presentations.
Collapse
|
23
|
Wang L, Failler M, Fu W, Dynlacht BD. A distal centriolar protein network controls organelle maturation and asymmetry. Nat Commun 2018; 9:3938. [PMID: 30258116 PMCID: PMC6158247 DOI: 10.1038/s41467-018-06286-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 08/24/2018] [Indexed: 12/14/2022] Open
Abstract
A long-standing mystery in the centrosome field pertains to the origin of asymmetry within the organelle. The removal of daughter centriole-specific/enriched proteins (DCPs) and acquisition of distal appendages on the future mother centriole are two important steps in the generation of asymmetry. We find that DCPs are recruited sequentially, and their removal is abolished in cells lacking Talpid3 or C2CD3. We show that removal of certain DCPs constitutes another level of control for distal appendage (DA) assembly. Remarkably, we also find that Talpid3 forms a distal centriolar multi-functional hub that coordinates the removal of specific DCPs, DA assembly, and recruitment of ciliary vesicles through distinct regions mutated in ciliopathies. Finally, we show that Talpid3, C2CD3, and OFD1 differentially regulate the assembly of sub-distal appendages, the CEP350/FOP/CEP19 module, centriolar satellites, and actin networks. Our work extends the spatial and functional understanding of proteins that control organelle maturation and asymmetry, ciliogenesis, and human disease.
Collapse
Affiliation(s)
- Lei Wang
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, NY, 10016, USA
| | - Marion Failler
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, NY, 10016, USA
| | - Wenxiang Fu
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, NY, 10016, USA.,Biozentrum, University of Basel, 4056, Basel, Switzerland
| | - Brian D Dynlacht
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, NY, 10016, USA.
| |
Collapse
|
24
|
Pauli S, Altmüller J, Schröder S, Ohlenbusch A, Dreha-Kulaczewski S, Bergmann C, Nürnberg P, Thiele H, Li Y, Wollnik B, Brockmann K. Homozygosity for the c.428delG variant in KIAA0586 in a healthy individual: implications for molecular testing in patients with Joubert syndrome. J Med Genet 2018; 56:261-264. [DOI: 10.1136/jmedgenet-2018-105470] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 08/02/2018] [Accepted: 08/02/2018] [Indexed: 11/03/2022]
Abstract
BackgroundJoubert syndrome (JBTS) is a rare neurodevelopmental disorder with marked phenotypic variability and genetic heterogeneity. Homozygous or compound heterozygous mutations in the KIAA0586 gene on chromosome 14q23 are known to be associated with JBTS-23. The frameshift variant c.428delG is the most frequent KIAA0586 variant reported in JBTS-23; yet, homozygosity of this variant was observed in two patients with JBTS-23. However, homozygosity of the c.428delG variant was recently reported as well in one healthy individual.ObjectiveTo clarify whether the frameshift variant c.428delG in KIAA0586 is pathogenic in the homozygous state.MethodsWhole-exome sequencing as well as RNA analysis were performed.ResultsWe identified biallelic mutations, including the variant c.428delG and a splice site variant c.1413–1G>C, in KIAA0586 in two siblings with clinical and MRI features of JBTS. The c.1413–1G>C variant was inherited from the healthy father. The c.428delG variant was found in the healthy mother in a homozygous state in blood lymphocytes, hair root cells and buccal epithelial cells. RNA analysis revealed that the transcript harbouring the c.428delG variant was expressed in blood cells from the healthy mother, indicating that transcripts harbouring this variant elude the mechanism of nonsense-mediated mRNA decay.ConclusionConsidering this and the high allele frequency of 0.003117 in the gnomAD database, we conclude that c.428delG represents a JBTS disease-causing variant only if present in compound heterozygous state with a more severe KIAA0586 variant, but not in a homozygous situation.
Collapse
|
25
|
Brooks BP, Zein WM, Thompson AH, Mokhtarzadeh M, Doherty DA, Parisi M, Glass IA, Malicdan MC, Vilboux T, Vemulapalli M, Mullikin JC, Gahl WA, Gunay-Aygun M. Joubert Syndrome: Ophthalmological Findings in Correlation with Genotype and Hepatorenal Disease in 99 Patients Prospectively Evaluated at a Single Center. Ophthalmology 2018; 125:1937-1952. [PMID: 30055837 DOI: 10.1016/j.ophtha.2018.05.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 05/25/2018] [Accepted: 05/29/2018] [Indexed: 01/14/2023] Open
Abstract
PURPOSE Joubert syndrome (JS) is caused by mutations in >34 genes that encode proteins involved with primary (nonmotile) cilia and the cilium basal body. This study describes the varying ocular phenotypes in JS patients, with correlation to systemic findings and genotype. DESIGN Patients were systematically and prospectively examined at the National Institutes of Health (NIH) Clinical Center in the setting of a dedicated natural history clinical trial. PARTICIPANTS Ninety-nine patients with JS examined at a single center. METHODS All patients underwent genotyping for JS, followed by complete age-appropriate ophthalmic examinations at the NIH Clinical Center, including visual acuity (VA), fixation behavior, lid position, motility assessment, slit-lamp biomicroscopy, dilated fundus examination with an indirect ophthalmoscope, and retinoscopy. Color and fundus autofluorescence imaging, Optos wide-field photography (Dunfermline, Scotland, UK), and electroretinography (ERG) were performed when possible. MAIN OUTCOME MEASURES The VA (with longitudinal follow-up where possible), ptosis, extraocular muscle function, retinal and optic nerve status, and retinal function as measured by ERG. RESULTS Among patients with JS with quantifiable VA (68/99), values ranged from 0 logarithm of the minimum angle of resolution (logMAR) (Snellen 20/20) to 1.5 logMAR (Snellen 20/632). Strabismus (71/98), nystagmus (66/99), oculomotor apraxia (60/77), ptosis (30/98), coloboma (28/99), retinal degeneration (20/83), and optic nerve atrophy (8/86) were identified. CONCLUSIONS We recommend regular monitoring for ophthalmological manifestations of JS beginning soon after birth or diagnosis. We demonstrate delayed visual development and note that the amblyogenic time frame may last significantly longer in JS than is typical. In general, patients with coloboma were less likely to display retinal degeneration, and those with retinal degeneration did not have coloboma. Severe retinal degeneration that is early and aggressive is seen in disease caused by specific genes, such as CEP290- and AHI1-associated JS. Retinal degeneration in INPP5E-, MKS1-, and NPHP1-associated JS was generally milder. Finally, ptosis surgery can be helpful in a subset of patients with JS; decisions as to timing and benefit/risk ratio need to be made on an individual basis according to expert consultation.
Collapse
Affiliation(s)
- Brian P Brooks
- National Eye Institute, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland; National Human Genome Research Institute, Genetics and Molecular Biology Branch, Bethesda, Maryland; Office of the Clinical Director, National Eye Institute, National Institutes of Health, Bethesda, Maryland.
| | - Wadih M Zein
- National Eye Institute, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - Amy H Thompson
- National Eye Institute, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland; Columbus Technologies & Services, Inc., Greenbelt, Maryland
| | - Maryam Mokhtarzadeh
- National Eye Institute, Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - Daniel A Doherty
- Department of Pediatrics, University of Washington, Seattle, Washington; Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, Washington
| | - Melissa Parisi
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
| | - Ian A Glass
- Department of Pediatrics, University of Washington, Seattle, Washington; Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, Washington
| | - May C Malicdan
- National Institutes of Health Undiagnosed Diseases Program, Common Fund, Office of the Director, National Institutes of Health, Bethesda, Maryland; Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Thierry Vilboux
- National Human Genome Research Institute, Genetics and Molecular Biology Branch, Bethesda, Maryland; Inova Translational Medicine Institute, Falls Church, Virginia
| | - Meghana Vemulapalli
- National Institutes of Health Intramural Sequencing Center, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - James C Mullikin
- National Institutes of Health Intramural Sequencing Center, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - William A Gahl
- National Institutes of Health Undiagnosed Diseases Program, Common Fund, Office of the Director, National Institutes of Health, Bethesda, Maryland; Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland; Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Meral Gunay-Aygun
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland; Johns Hopkins University School of Medicine, Department of Pediatrics and McKusick-Nathans Institute of Genetic Medicine, Baltimore, Maryland
| |
Collapse
|
26
|
Joseph N, Al-Jassar C, Johnson CM, Andreeva A, Barnabas DD, Freund SMV, Gergely F, van Breugel M. Disease-Associated Mutations in CEP120 Destabilize the Protein and Impair Ciliogenesis. Cell Rep 2018; 23:2805-2818. [PMID: 29847808 PMCID: PMC5990496 DOI: 10.1016/j.celrep.2018.04.100] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 03/15/2018] [Accepted: 04/24/2018] [Indexed: 01/10/2023] Open
Abstract
Ciliopathies are a group of genetic disorders caused by a failure to form functional cilia. Due to a lack of structural information, it is currently poorly understood how ciliopathic mutations affect protein functionality to give rise to the underlying disease. Using X-ray crystallography, we show that the ciliopathy-associated centriolar protein CEP120 contains three C2 domains. The point mutations V194A and A199P, which cause Joubert syndrome (JS) and Jeune asphyxiating thoracic dystrophy (JATD), respectively, both reduce the thermostability of the second C2 domain by targeting residues that point toward its hydrophobic core. Genome-engineered cells homozygous for these mutations have largely normal centriole numbers but show reduced CEP120 levels, compromised recruitment of distal centriole markers, and deficient cilia formation. Our results provide insight into the disease mechanism of two ciliopathic mutations in CEP120, identify putative binding partners of CEP120 C2B, and suggest a complex genotype-phenotype relation of the CEP120 ciliopathy alleles.
Collapse
Affiliation(s)
- Nimesh Joseph
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK
| | - Caezar Al-Jassar
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Christopher M Johnson
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Antonina Andreeva
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Deepak D Barnabas
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Stefan M V Freund
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Fanni Gergely
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Robinson Way, Cambridge CB2 0RE, UK.
| | - Mark van Breugel
- Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.
| |
Collapse
|
27
|
Hua K, Ferland RJ. Primary cilia proteins: ciliary and extraciliary sites and functions. Cell Mol Life Sci 2018; 75:1521-1540. [PMID: 29305615 PMCID: PMC5899021 DOI: 10.1007/s00018-017-2740-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 12/21/2017] [Accepted: 12/27/2017] [Indexed: 02/07/2023]
Abstract
Primary cilia are immotile organelles known for their roles in development and cell signaling. Defects in primary cilia result in a range of disorders named ciliopathies. Because this organelle can be found singularly on almost all cell types, its importance extends to most organ systems. As such, elucidating the importance of the primary cilium has attracted researchers from all biological disciplines. As the primary cilia field expands, caution is warranted in attributing biological defects solely to the function of this organelle, since many of these "ciliary" proteins are found at other sites in cells and likely have non-ciliary functions. Indeed, many, if not all, cilia proteins have locations and functions outside the primary cilium. Extraciliary functions are known to include cell cycle regulation, cytoskeletal regulation, and trafficking. Cilia proteins have been observed in the nucleus, at the Golgi apparatus, and even in immune synapses of T cells (interestingly, a non-ciliated cell). Given the abundance of extraciliary sites and functions, it can be difficult to definitively attribute an observed phenotype solely to defective cilia rather than to some defective extraciliary function or a combination of both. Thus, extraciliary sites and functions of cilia proteins need to be considered, as well as experimentally determined. Through such consideration, we will understand the true role of the primary cilium in disease as compared to other cellular processes' influences in mediating disease (or through a combination of both). Here, we review a compilation of known extraciliary sites and functions of "cilia" proteins as a means to demonstrate the potential non-ciliary roles for these proteins.
Collapse
Affiliation(s)
- Kiet Hua
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, 47 New Scotland Avenue, MC-136, Albany, NY, 12208, USA.
| | - Russell J Ferland
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, 47 New Scotland Avenue, MC-136, Albany, NY, 12208, USA.
- Department of Neurology, Albany Medical College, Albany, NY, 12208, USA.
| |
Collapse
|
28
|
Dummer A, Rol N, Szulcek R, Kurakula K, Pan X, Visser BI, Bogaard HJ, DeRuiter MC, Goumans MJ, Hierck BP. Endothelial dysfunction in pulmonary arterial hypertension: loss of cilia length regulation upon cytokine stimulation. Pulm Circ 2018; 8:2045894018764629. [PMID: 29480152 PMCID: PMC5858634 DOI: 10.1177/2045894018764629] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 02/20/2018] [Indexed: 12/21/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a syndrome characterized by progressive lung vascular remodelling, endothelial cell (EC) dysfunction, and excessive inflammation. The primary cilium is a sensory antenna that integrates signalling and fine tunes EC responses to various stimuli. Yet, cilia function in the context of deregulated immunity in PAH remains obscure. We hypothesized that cilia function is impaired in ECs from patients with PAH due to their inflammatory status and tested whether cilia length changes in response to cytokines. Primary human pulmonary and mouse embryonic EC were exposed to pro- (TNFα, IL1β, and IFNγ) and/or anti-inflammatory (IL-10) cytokines and cilia length was quantified. Chronic treatment with all tested inflammatory cytokines led to a significant elongation of cilia in both control human and mouse EC (by ∼1 µm, P < 0.001). This structural response was PKA/PKC dependent. Intriguingly, withdrawal of the inflammatory stimulus did not reduce cilia length. IL-10, on the other hand, blocked and reversed the pro-inflammatory cytokine-induced cilia elongation in healthy ECs, but did not influence basal length. Conversely, primary cilia of ECs from PAH patients were significantly longer under basal conditions compared to controls (1.86 ± 0.02 vs. 2.43 ± 0.08 µm, P = 0.002). These cilia did not elongate further upon pro-inflammatory stimulation and anti-inflammatory treatment did not impact cilia length. The missing length modulation was specific to cytokine stimulation, as application of fluid shear stress led to increased cilia length in the PAH endothelium. We identified loss of cilia length regulation upon cytokine stimulation as part of the endothelial dysfunction in PAH.
Collapse
Affiliation(s)
- Anneloes Dummer
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands
| | - Nina Rol
- Department of Pulmonary Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Robert Szulcek
- Department of Pulmonary Medicine, VU University Medical Center, Amsterdam, The Netherlands
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Kondababu Kurakula
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Xiaoke Pan
- Department of Pulmonary Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Benjamin I. Visser
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands
| | - Harm Jan Bogaard
- Department of Pulmonary Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Marco C. DeRuiter
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands
| | - Marie-José Goumans
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Beerend P. Hierck
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
29
|
Burke EA, Frucht SJ, Thompson K, Wolfe LA, Yokoyama T, Bertoni M, Huang Y, Sincan M, Adams DR, Taylor RW, Gahl WA, Toro C, Malicdan MCV. Biallelic mutations in mitochondrial tryptophanyl-tRNA synthetase cause Levodopa-responsive infantile-onset Parkinsonism. Clin Genet 2018; 93:712-718. [PMID: 29120065 PMCID: PMC5828974 DOI: 10.1111/cge.13172] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/30/2017] [Accepted: 11/05/2017] [Indexed: 12/30/2022]
Abstract
Mitochondrial aminoacyl‐tRNA synthetases (mtARSs) are essential, ubiquitously expressed enzymes that covalently attach amino acids to their corresponding tRNA molecules during translation of mitochondrial genes. Deleterious variants in the mtARS genes cause a diverse array of phenotypes, many of which involve the nervous system. Moreover, distinct mutations in mtARSs often cause different clinical manifestations. Recently, the gene encoding mitochondrial tryptophanyl tRNA synthetase (WARS2) was reported to cause 2 different neurological phenotypes, a form of autosomal recessive intellectual disability and a syndrome of severe infantile‐onset leukoencephalopathy. Here, we report the case of a 17‐year‐old boy with compound heterozygous mutations in WARS2 (p.Trp13Gly, p.Ser228Trp) who presented with infantile‐onset, Levodopa‐responsive Parkinsonism at the age of 2 years. Analysis of patient‐derived dermal fibroblasts revealed decreased steady‐state WARS2 protein and normal OXPHOS content. Muscle mitochondrial studies suggested mitochondrial proliferation without obvious respiratory chain deficiencies at the age of 9 years. This case expands the phenotypic spectrum of WARS2 deficiency and emphasizes the importance of mitochondrial protein synthesis in the pathogenesis of Parkinsonism.
Collapse
Affiliation(s)
- E A Burke
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland
| | - S J Frucht
- Movement Disorders Division, School of Medicine, New York University Langone, New York, New York
| | - K Thompson
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, The Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - L A Wolfe
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland.,Office of the Clinical Director, NHGRI, NIH, Bethesda, Maryland
| | - T Yokoyama
- Section of Human Biochemical Genetics, Medical Genetics Branch, NHGRI, NIH, Bethesda, Maryland
| | - M Bertoni
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland
| | - Y Huang
- Office of the Clinical Director, NHGRI, NIH, Bethesda, Maryland
| | - M Sincan
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland
| | - D R Adams
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland.,Office of the Clinical Director, NHGRI, NIH, Bethesda, Maryland
| | - R W Taylor
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, The Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - W A Gahl
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland.,Office of the Clinical Director, NHGRI, NIH, Bethesda, Maryland.,Section of Human Biochemical Genetics, Medical Genetics Branch, NHGRI, NIH, Bethesda, Maryland
| | - C Toro
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland.,Office of the Clinical Director, NHGRI, NIH, Bethesda, Maryland
| | - M C V Malicdan
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NHGRI, NIH, Bethesda, Maryland.,Office of the Clinical Director, NHGRI, NIH, Bethesda, Maryland
| |
Collapse
|
30
|
Ojeda Naharros I, Cristian FB, Zang J, Gesemann M, Ingham PW, Neuhauss SCF, Bachmann-Gagescu R. The ciliopathy protein TALPID3/KIAA0586 acts upstream of Rab8 activation in zebrafish photoreceptor outer segment formation and maintenance. Sci Rep 2018; 8:2211. [PMID: 29396404 PMCID: PMC5797153 DOI: 10.1038/s41598-018-20489-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 01/19/2018] [Indexed: 12/12/2022] Open
Abstract
Ciliopathies are human disorders caused by dysfunction of primary cilia, ubiquitous microtubule-based organelles involved in signal transduction. Cilia are anchored inside the cell through basal bodies (BBs), modified centrioles also acting as microtubule-organization centers. Photoreceptors (PRs) are sensory neurons, whose primary cilium forms a highly specialized compartment called the outer segment (OS) responsible for sensing incoming light. Thus, ciliopathies often present with retinal degeneration. Mutations in KIAA0586/TALPID3 (TA3) cause Joubert syndrome, in which 30% of affected individuals develop retinal involvement. To elucidate the function of TALPID3 in PRs, we studied talpid3 zebrafish mutants and identified a progressive retinal degeneration phenotype. The majority of PRs lack OS development due to defects in BB positioning and docking at the apical cell surface. Intracellular accumulation of the photopigment opsin leads to PR cell death of moderate severity. Electroretinograms demonstrate severe visual impairement. A small subset of PRs display normally docked BBs and extended OSs through rescue by maternally-deposited Talpid3. While localization of the small GTPase Rab8a, which plays an important role in BB docking, appears unaffected in talpid3-/- PRs, overexpression of constitutively active Rab8a rescues OS formation, indicating that the role of Ta3 in early ciliogenesis lies upstream of Rab8a activation in PRs.
Collapse
Affiliation(s)
- Irene Ojeda Naharros
- Institute for Molecular Life Sciences, University of Zurich, 8057, Zurich, Switzerland
| | - Flavia B Cristian
- Institute for Molecular Life Sciences, University of Zurich, 8057, Zurich, Switzerland
- Department of Human Molecular Genetics, Institute of Human Genetics, University of Heidelberg, Heidelberg, Germany
| | - Jingjing Zang
- Institute for Molecular Life Sciences, University of Zurich, 8057, Zurich, Switzerland
| | - Matthias Gesemann
- Institute for Molecular Life Sciences, University of Zurich, 8057, Zurich, Switzerland
| | - Philip W Ingham
- Lee Kong Chian School of Medicine, Nanyang Technological University, 639798, Singapore, Singapore
| | - Stephan C F Neuhauss
- Institute for Molecular Life Sciences, University of Zurich, 8057, Zurich, Switzerland
| | - Ruxandra Bachmann-Gagescu
- Institute for Molecular Life Sciences, University of Zurich, 8057, Zurich, Switzerland.
- Institute for Medical Genetics, University of Zurich, 8952, Schlieren, Switzerland.
| |
Collapse
|
31
|
Abstract
The approach to identifying a genetic cause in patients with cerebellar disorders relies on history, examination, consultation, and testing, combined with specialized expertise because they are rare and genetically diverse. Cerebellar disorders can be caused by a variety of DNA alterations including single-nucleotide changes, small insertions or deletions, larger copy number variants, and nucleotide repeat expansions, exhibiting autosomal-recessive, autosomal-dominant (inherited and de novo), X-linked, and mitochondrial modes of inheritance. Imaging findings and a variety of neurologic and nonneurologic clinical features can help direct genetic testing and choose the most appropriate strategy. Clinical and genetic diagnoses are complementary, each providing distinct information for the care of the patient. In this chapter, we provide an overview of inheritance modes for different cerebellar disorders and the variety of genetic testing and tools that are currently available to reach a genetic diagnosis, including conventional and next-generation sequencing, classic, molecular and virtual cytogenetics, testing for repeat expansions, and other techniques. Practical examples are presented in both the text and accompanying vignettes.
Collapse
Affiliation(s)
- Enza Maria Valente
- Neurogenetics Unit, IRCCS Santa Lucia Foundation, Rome, Italy; Department of Molecular Medicine, University of Pavia, Pavia, Italy.
| | - Sara Nuovo
- Neurogenetics Unit, IRCCS Santa Lucia Foundation, Rome, Italy; Department of Medicine and Surgery, University of Salerno, Salerno, Italy
| | - Dan Doherty
- Department of Pediatrics, University of Washington and Seattle Children's Research Institute, Seattle, WA, United States
| |
Collapse
|
32
|
Malicdan MCV, Vilboux T, Ben-Zeev B, Guo J, Eliyahu A, Pode-Shakked B, Dori A, Kakani S, Chandrasekharappa SC, Ferreira C, Shelestovich N, Marek-Yagel D, Pri-Chen H, Blatt I, Niederhuber JE, He L, Toro C, Taylor RW, Deeken J, Yardeni T, Wallace DC, Gahl WA, Anikster Y. A novel inborn error of the coenzyme Q10 biosynthesis pathway: cerebellar ataxia and static encephalomyopathy due to COQ5 C-methyltransferase deficiency. Hum Mutat 2018; 39:69-79. [PMID: 29044765 PMCID: PMC5722658 DOI: 10.1002/humu.23345] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 08/27/2017] [Accepted: 09/11/2017] [Indexed: 01/08/2023]
Abstract
Primary coenzyme Q10 (CoQ10 ; MIM# 607426) deficiencies are an emerging group of inherited mitochondrial disorders with heterogonous clinical phenotypes. Over a dozen genes are involved in the biosynthesis of CoQ10 , and mutations in several of these are associated with human disease. However, mutations in COQ5 (MIM# 616359), catalyzing the only C-methylation in the CoQ10 synthetic pathway, have not been implicated in human disease. Here, we report three female siblings of Iraqi-Jewish descent, who had varying degrees of cerebellar ataxia, encephalopathy, generalized tonic-clonic seizures, and cognitive disability. Whole-exome and subsequent whole-genome sequencing identified biallelic duplications in the COQ5 gene, leading to reduced levels of CoQ10 in peripheral white blood cells of all affected individuals and reduced CoQ10 levels in the only muscle tissue available from one affected proband. CoQ10 supplementation led to clinical improvement and increased the concentrations of CoQ10 in blood. This is the first report of primary CoQ10 deficiency caused by loss of function of COQ5, with delineation of the clinical, laboratory, histological, and molecular features, and insights regarding targeted treatment with CoQ10 supplementation.
Collapse
Affiliation(s)
- May Christine V. Malicdan
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, 20892 Maryland, USA
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, 20892 Maryland, USA
| | - Thierry Vilboux
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, 20892 Maryland, USA
- Inova Translational Medicine Institute, Falls Church, 22042 Virginia, USA
| | - Bruria Ben-Zeev
- Pediatric Neurology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, 5621 Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
- Department of Pathology, Sheba Medical Center, Tel-Hashomer, 52621, Israel
| | - Jennifer Guo
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, 20892 Maryland, USA
| | - Aviva Eliyahu
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, 5621 Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
| | - Ben Pode-Shakked
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, 5621 Israel
- The Dr. Pinchas Borenstein Talpiot Medical Leadership Program, Sheba Medical Center, Tel-Hashomer, 5621 Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
| | - Amir Dori
- The Dr. Pinchas Borenstein Talpiot Medical Leadership Program, Sheba Medical Center, Tel-Hashomer, 5621 Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
- Joseph Sagol Neuroscience Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978 Israel
| | - Sravan Kakani
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, 20892 Maryland, USA
| | - Settara C. Chandrasekharappa
- Cancer Genetics and Comparative Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, 20892 Maryland, USA
| | - Carlos Ferreira
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, 20892 Maryland, USA
| | - Natalia Shelestovich
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
- Center for Mitochondrial and Epigenomic Medicine, Children’s Hospital of Philadelphia Research Institute, Philadelphia, USA
| | - Dina Marek-Yagel
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, 5621 Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
- Department of Pathology, Sheba Medical Center, Tel-Hashomer, 52621, Israel
| | - Hadass Pri-Chen
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, 20892 Maryland, USA
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, 52621, Israel
| | - Ilan Blatt
- Department of Neurology, Sheba Medical Center, Tel-Hashomer, 5621 Israel
| | - John E. Niederhuber
- Inova Translational Medicine Institute, Falls Church, 22042 Virginia, USA
- Johns Hopkins University School of Medicine, 733 North Broadway Street, Baltimore, MD, USA
| | - Langping He
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, The Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - Camilo Toro
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, 20892 Maryland, USA
| | - Robert W. Taylor
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, The Medical School, Newcastle University, Newcastle upon Tyne, UK
| | - John Deeken
- Inova Translational Medicine Institute, Falls Church, 22042 Virginia, USA
| | - Tal Yardeni
- Center for Mitochondrial and Epigenomic Medicine, Children’s Hospital of Philadelphia Research Institute, Philadelphia, USA
| | - Douglas C. Wallace
- Center for Mitochondrial and Epigenomic Medicine, Children’s Hospital of Philadelphia Research Institute, Philadelphia, USA
| | - William A. Gahl
- NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH and National Human Genome Research Institute, NIH, Bethesda, 20892 Maryland, USA
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, 20892 Maryland, USA
| | - Yair Anikster
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, 5621 Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, 52621, Israel
| |
Collapse
|
33
|
Antony D, Nampoory N, Bacchelli C, Melhem M, Wu K, James CT, Beales PL, Hubank M, Thomas D, Mashankar A, Behbehani K, Schmidts M, Alsmadi O. Exome sequencing for the differential diagnosis of ciliary chondrodysplasias: Example of a WDR35 mutation case and review of the literature. Eur J Med Genet 2017; 60:658-666. [DOI: 10.1016/j.ejmg.2017.08.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 08/17/2017] [Accepted: 08/29/2017] [Indexed: 12/30/2022]
|
34
|
Hardee I, Soldatos A, Davids M, Vilboux T, Toro C, David KL, Ferreira CR, Nehrebecky M, Snow J, Thurm A, Heller T, Macnamara EF, Gunay-Aygun M, Zein WM, Gahl WA, Malicdan MCV. Defective ciliogenesis in INPP5E-related Joubert syndrome. Am J Med Genet A 2017; 173:3231-3237. [PMID: 29052317 DOI: 10.1002/ajmg.a.38376] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 05/15/2017] [Accepted: 07/01/2017] [Indexed: 12/18/2022]
Abstract
Joubert syndrome is a neurodevelopmental disorder, characterized by malformation of the mid and hindbrain leading to the pathognomonic molar tooth appearance of the brainstem and cerebellum on axial MRI. Core clinical manifestations include hypotonia, tachypnea/apnea, ataxia, ocular motor apraxia, and developmental delay of varying degrees. In addition, a subset of patients has retinal dystrophy, chorioretinal colobomas, hepatorenal fibrocystic disease, and polydactyly. Joubert syndrome exhibits genetic heterogeneity, with mutations identified in more than 30 genes, including INPP5E, a gene encoding inositol polyphosphate 5-phosphatase E, which is important in the development and stability of the primary cilium. Here, we report the detailed clinical phenotypes of two sisters with a novel homozygous variant in INPP5E (NM_019892.4: c.1565G>C, NP_063945.2: p.Gly552Ala), expanding the phenotype associated with Joubert syndrome type 1. Expression studies using patient-derived fibroblasts showed changes in mRNA and protein levels. Analysis of fibroblasts from patients revealed that a significant number of cells had shorter or no cilia, indicating defects in ciliogenesis, and cilia maintenance.
Collapse
Affiliation(s)
- Isabel Hardee
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Ariane Soldatos
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Mariska Davids
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Thierry Vilboux
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Department of Medical Genetics, Inova Translational Medicine Institute, Falls Church, Virginia
| | - Camilo Toro
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | | | - Carlos R Ferreira
- Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Michele Nehrebecky
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Joseph Snow
- Office of the Clinical Director, National Institute of Mental health, National Institutes of Health, Bethesda, Maryland
| | - Audrey Thurm
- Office of the Clinical Director, National Institute of Mental health, National Institutes of Health, Bethesda, Maryland
| | - Theo Heller
- National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, Maryland
| | - Ellen F Macnamara
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - Meral Gunay-Aygun
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Department of Pediatrics and McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Wadih M Zein
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland
| | - William A Gahl
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| | - May Christine V Malicdan
- NIH Undiagnosed Diseases Program, Common Fund, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland.,Office of the Clinical Director, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
| |
Collapse
|
35
|
Mitchison HM, Valente EM. Motile and non-motile cilia in human pathology: from function to phenotypes. J Pathol 2017; 241:294-309. [PMID: 27859258 DOI: 10.1002/path.4843] [Citation(s) in RCA: 287] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 11/03/2016] [Accepted: 11/04/2016] [Indexed: 12/13/2022]
Abstract
Ciliopathies are inherited human disorders caused by both motile and non-motile cilia dysfunction that form an important and rapidly expanding disease category. Ciliopathies are complex conditions to diagnose, being multisystem disorders characterized by extensive genetic heterogeneity and clinical variability with high levels of lethality. There is marked phenotypic overlap among distinct ciliopathy syndromes that presents a major challenge for their recognition, diagnosis, and clinical management, in addition to posing an on-going task to develop the most appropriate family counselling. The impact of next-generation sequencing and high-throughput technologies in the last decade has significantly improved our understanding of the biological basis of ciliopathy disorders, enhancing our ability to determine the possible reasons for the extensive overlap in their symptoms and genetic aetiologies. Here, we review the diverse functions of cilia in human health and disease and discuss a growing shift away from the classical clinical definitions of ciliopathy syndromes to a more functional categorization. This approach arises from our improved understanding of this unique organelle, revealed through new genetic and cell biological insights into the discrete functioning of subcompartments of the cilium (basal body, transition zone, intraflagellar transport, motility). Mutations affecting these distinct ciliary protein modules can confer different genetic diseases and new clinical classifications are possible to define, according to the nature and extent of organ involvement. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Hannah M Mitchison
- Genetics and Genomic Medicine Programme, University College London, UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London, WC1N 1EH, UK
| | - Enza Maria Valente
- Department of Medicine and Surgery, University of Salerno, Salerno, Italy.,Neurogenetics Unit, IRCCS Santa Lucia Foundation, Via del Fosso di Fiorano, 00143, Rome, Italy
| |
Collapse
|
36
|
Leslie EJ, Carlson JC, Shaffer JR, Buxó CJ, Castilla EE, Christensen K, Deleyiannis FWB, Field LL, Hecht JT, Moreno L, Orioli IM, Padilla C, Vieira AR, Wehby GL, Feingold E, Weinberg SM, Murray JC, Marazita ML. Association studies of low-frequency coding variants in nonsyndromic cleft lip with or without cleft palate. Am J Med Genet A 2017; 173:1531-1538. [PMID: 28425186 DOI: 10.1002/ajmg.a.38210] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 02/05/2017] [Accepted: 02/15/2017] [Indexed: 11/10/2022]
Abstract
Nonsyndromic cleft lip with or without cleft palate (NSCL/P) is a group of common human birth defects with complex etiology. Although genome-wide association studies have successfully identified a number of risk loci, these loci only account for about 20% of the heritability of orofacial clefts. The "missing" heritability may be found in rare variants, copy number variants, or interactions. In this study, we investigated the role of low-frequency variants genotyped in 1995 cases and 1626 controls on the Illumina HumanCore + Exome chip. We performed two statistical tests, Sequence Kernel Association Test (SKAT) and Combined Multivariate and Collapsing (CMC) method using two minor allele frequency cutoffs (1% and 5%). We found that a burden of low-frequency coding variants in N4BP2, CDSN, PRTG, and AHRR were associated with increased risk of NSCL/P. Low-frequency variants in other genes were associated with decreased risk of NSCL/P. These results demonstrate that low-frequency variants contribute to the genetic etiology of NSCL/P.
Collapse
Affiliation(s)
- Elizabeth J Leslie
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jenna C Carlson
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - John R Shaffer
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Carmen J Buxó
- School of Dental Medicine, University of Puerto Rico, San Juan, Puerto Rico
| | - Eduardo E Castilla
- CEMIC: Center for Medical Education and Clinical Research, Buenos Aires, Argentina.,ECLAMC (Latin American Collaborative Study of Congenital Malformations) at INAGEMP (National Institute of Population Medical Genetics), Rio de Janeiro, Brazil.,Laboratory of Congenital Malformation Epidemiology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
| | - Kaare Christensen
- Department of Epidemiology, Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - Frederic W B Deleyiannis
- Department of Surgery, Plastic and Reconstructive Surgery, University of Colorado School of Medicine, Denver, Colorado
| | - Leigh L Field
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Jacqueline T Hecht
- Department of Pediatrics, McGovern Medical School and School of Dentistry UT Health at Houston, Houston, Texas
| | - Lina Moreno
- Department of Orthodontics, College of Dentistry, University of Iowa, Iowa City, Iowa
| | - Ieda M Orioli
- ECLAMC (Latin American Collaborative Study of Congenital Malformations) at INAGEMP (National Institute of Population Medical Genetics), Rio de Janeiro, Brazil.,Department of Genetics, Institute of Biology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carmencita Padilla
- Department of Pediatrics, College of Medicine; and Institute of Human Genetics, National Institutes of Health, University of the Philippines Manila, Manila, The Philippines.,Philippine Genome Center, University of the Philippines System, Manila, The Philippines
| | - Alexandre R Vieira
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - George L Wehby
- Department of Health Management and Policy, College of Public Health, University of Iowa, Iowa City, Iowa
| | - Eleanor Feingold
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Seth M Weinberg
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jeffrey C Murray
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Mary L Marazita
- Center for Craniofacial and Dental Genetics, Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania.,Clinical and Translational Science, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| |
Collapse
|
37
|
Abstract
Nephronophthisis-related ciliopathies (NPHP-RC) are a group of inherited diseases that affect genes encoding proteins that localize to primary cilia or centrosomes. With few exceptions, ciliopathies are inherited in an autosomal recessive manner, and affected individuals manifest early during childhood or adolescence. NPHP-RC are genetically very heterogeneous, and, currently, mutations in more than 90 genes have been described as single-gene causes. The phenotypes of NPHP-RC are very diverse, and include cystic-fibrotic kidney disease, brain developmental defects, retinal degeneration, skeletal deformities, facial dimorphism, and, in some cases, laterality defects, and congenital heart disease. Mutations in the same gene can give rise to diverse phenotypes depending on the mutated allele. At the same time, there is broad phenotypic overlap between different monogenic genes. The identification of monogenic causes of ciliopathies has furthered the understanding of molecular mechanism and cellular pathways involved in the pathogenesis.
Collapse
|
38
|
Barel O, Malicdan MCV, Ben-Zeev B, Kandel J, Pri-Chen H, Stephen J, Castro IG, Metz J, Atawa O, Moshkovitz S, Ganelin E, Barshack I, Polak-Charcon S, Nass D, Marek-Yagel D, Amariglio N, Shalva N, Vilboux T, Ferreira C, Pode-Shakked B, Heimer G, Hoffmann C, Yardeni T, Nissenkorn A, Avivi C, Eyal E, Kol N, Glick Saar E, Wallace DC, Gahl WA, Rechavi G, Schrader M, Eckmann DM, Anikster Y. Deleterious variants in TRAK1 disrupt mitochondrial movement and cause fatal encephalopathy. Brain 2017; 140:568-581. [PMID: 28364549 PMCID: PMC6075218 DOI: 10.1093/brain/awx002] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 11/22/2016] [Accepted: 12/05/2016] [Indexed: 01/12/2023] Open
Abstract
Cellular distribution and dynamics of mitochondria are regulated by several motor proteins and a microtubule network. In neurons, mitochondrial trafficking is crucial because of high energy needs and calcium ion buffering along axons to synapses during neurotransmission. The trafficking kinesin proteins (TRAKs) are well characterized for their role in lysosomal and mitochondrial trafficking in cells, especially neurons. Using whole exome sequencing, we identified homozygous truncating variants in TRAK1 (NM_001042646:c.287-2A > C), in six lethal encephalopathic patients from three unrelated families. The pathogenic variant results in aberrant splicing and significantly reduced gene expression at the RNA and protein levels. In comparison with normal cells, TRAK1-deficient fibroblasts showed irregular mitochondrial distribution, altered mitochondrial motility, reduced mitochondrial membrane potential, and diminished mitochondrial respiration. This study confirms the role of TRAK1 in mitochondrial dynamics and constitutes the first report of this gene in association with a severe neurodevelopmental disorder.
Collapse
Affiliation(s)
- Ortal Barel
- Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
| | - May Christine V Malicdan
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
- NIH Undiagnosed Diseases Program, NHGRI, National Institutes of Health, Bethesda, Maryland, USA
| | - Bruria Ben-Zeev
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Pediatric Neurology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Judith Kandel
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Hadass Pri-Chen
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Joshi Stephen
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Inês G Castro
- Department of Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Jeremy Metz
- Department of Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Osama Atawa
- Palestenian Red Crescent Society Hospital, Department of Pediatrics, Hebron City, Palestine
| | - Sharon Moshkovitz
- Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
| | - Esther Ganelin
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Pediatric Neurology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Iris Barshack
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Pathology, Sheba Medical Center, Tel-Hashomer, Israel
| | - Sylvie Polak-Charcon
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Pathology, Sheba Medical Center, Tel-Hashomer, Israel
| | - Dvora Nass
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Pathology, Sheba Medical Center, Tel-Hashomer, Israel
| | - Dina Marek-Yagel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Ninette Amariglio
- Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
| | - Nechama Shalva
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Thierry Vilboux
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
- Inova Translational Medicine Institute, Inova Health System, Falls Church, Virginia, USA
| | - Carlos Ferreira
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
- Division of Genetics and Metabolism, Children’s National Health System, Washington DC, USA
| | - Ben Pode-Shakked
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
- The Dr. Pinchas Borenstein Talpiot Medical Leadership Program, Sheba Medical Center, Tel-Hashomer, Israel
| | - Gali Heimer
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Pediatric Neurology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
- The Dr. Pinchas Borenstein Talpiot Medical Leadership Program, Sheba Medical Center, Tel-Hashomer, Israel
| | - Chen Hoffmann
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Radiology, Sheba Medical Center, Tel-Hashomer, Israel
| | - Tal Yardeni
- Center for Mitochondrial and Epigenomic Medicine, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Andreea Nissenkorn
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Service for Rare Disorders, Pediatric Neurology Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| | - Camila Avivi
- Department of Pathology, Sheba Medical Center, Tel-Hashomer, Israel
| | - Eran Eyal
- Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
| | - Nitzan Kol
- Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
| | - Efrat Glick Saar
- Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
| | - Douglas C Wallace
- Center for Mitochondrial and Epigenomic Medicine, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - William A Gahl
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
- NIH Undiagnosed Diseases Program, NHGRI, National Institutes of Health, Bethesda, Maryland, USA
| | - Gideon Rechavi
- Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Michael Schrader
- Department of Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - David M Eckmann
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, Philadelphia, Pennsylvania, USA
- Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Yair Anikster
- The Wohl Institute for Translational Medicine, Sheba Medical Center, Tel-Hashomer, Israel
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Metabolic Disease Unit, Edmond and Lily Safra Children’s Hospital, Sheba Medical Center, Tel-Hashomer, Israel
| |
Collapse
|
39
|
Duran I, Taylor SP, Zhang W, Martin J, Forlenza KN, Spiro RP, Nickerson DA, Bamshad M, Cohn DH, Krakow D. Destabilization of the IFT-B cilia core complex due to mutations in IFT81 causes a Spectrum of Short-Rib Polydactyly Syndrome. Sci Rep 2016; 6:34232. [PMID: 27666822 PMCID: PMC5035930 DOI: 10.1038/srep34232] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 09/06/2016] [Indexed: 01/13/2023] Open
Abstract
Short-rib polydactyly syndromes (SRPS) and Asphyxiating thoracic dystrophy (ATD) or Jeune Syndrome are recessively inherited skeletal ciliopathies characterized by profound skeletal abnormalities and are frequently associated with polydactyly and multiorgan system involvement. SRPS are produced by mutations in genes that participate in the formation and function of primary cilia and usually result from disruption of retrograde intraflagellar (IFT) transport of the cilium. Herein we describe a new spectrum of SRPS caused by mutations in the gene IFT81, a key component of the IFT-B complex essential for anterograde transport. In mutant chondrocytes, the mutations led to low levels of IFT81 and mutant cells produced elongated cilia, had altered hedgehog signaling, had increased post-translation modification of tubulin, and showed evidence of destabilization of additional anterograde transport complex components. These findings demonstrate the importance of IFT81 in the skeleton, its role in the anterograde transport complex, and expand the number of loci associated with SRPS.
Collapse
Affiliation(s)
- Ivan Duran
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA.,Networking Biomedical Research Center in Bioengineering, Biomaterials and Nanomedicine, (CIBER-BBN), University of Malaga, Malaga, 29071, Spain
| | - S Paige Taylor
- Department of Human Genetics, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA
| | - Wenjuan Zhang
- Department of Molecular, Cell, and Developmental Biology, University of California at Los Angeles, Los Angeles, California, 90095, USA
| | - Jorge Martin
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA
| | - Kimberly N Forlenza
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA
| | - Rhonda P Spiro
- Children's Healthcare of Atlanta, Atlanta, GA, 30342, USA
| | - Deborah A Nickerson
- University of Washington Center for Mendelian Genomics, University of Washington, Seattle, Washington, 98195, USA
| | - Michael Bamshad
- University of Washington Center for Mendelian Genomics, University of Washington, Seattle, Washington, 98195, USA
| | - Daniel H Cohn
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA.,Department of Molecular, Cell, and Developmental Biology, University of California at Los Angeles, Los Angeles, California, 90095, USA
| | - Deborah Krakow
- Department of Orthopaedic Surgery, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA.,Department of Human Genetics, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA.,Department of Obstetrics and Gynecology, David Geffen School of Medicine at the University of California at Los Angeles, Los Angeles, California, 90095, USA
| |
Collapse
|
40
|
Roosing S, Romani M, Isrie M, Rosti RO, Micalizzi A, Musaev D, Mazza T, Al-gazali L, Altunoglu U, Boltshauser E, D'Arrigo S, De Keersmaecker B, Kayserili H, Brandenberger S, Kraoua I, Mark PR, McKanna T, Van Keirsbilck J, Moerman P, Poretti A, Puri R, Van Esch H, Gleeson JG, Valente EM. Mutations in CEP120 cause Joubert syndrome as well as complex ciliopathy phenotypes. J Med Genet 2016; 53:608-15. [PMID: 27208211 PMCID: PMC5013089 DOI: 10.1136/jmedgenet-2016-103832] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 03/16/2016] [Accepted: 04/02/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND Ciliopathies are an extensive group of autosomal recessive or X-linked disorders with considerable genetic and clinical overlap, which collectively share multiple organ involvement and may result in lethal or viable phenotypes. In large numbers of cases the genetic defect remains yet to be determined. The aim of this study is to describe the mutational frequency and phenotypic spectrum of the CEP120 gene. METHODS Exome sequencing was performed in 145 patients with Joubert syndrome (JS), including 15 children with oral-facial-digital syndrome type VI (OFDVI) and 21 Meckel syndrome (MKS) fetuses. Moreover, exome sequencing was performed in one fetus with tectocerebellar dysraphia with occipital encephalocele (TCDOE), molar tooth sign and additional skeletal abnormalities. As a parallel study, 346 probands with a phenotype consistent with JS or related ciliopathies underwent next-generation sequencing-based targeted sequencing of 120 previously described and candidate ciliopathy genes. RESULTS We present six probands carrying nine distinct mutations (of which eight are novel) in the CEP120 gene, previously found mutated only in Jeune asphyxiating thoracic dystrophy (JATD). The CEP120-associated phenotype ranges from mild classical JS in four patients to more severe conditions in two fetuses, with overlapping features of distinct ciliopathies that include TCDOE, MKS, JATD and OFD syndromes. No obvious correlation is evident between the type or location of identified mutations and the ciliopathy phenotype. CONCLUSION Our findings broaden the spectrum of phenotypes caused by CEP120 mutations that account for nearly 1% of patients with JS as well as for more complex ciliopathy phenotypes. The lack of clear genotype-phenotype correlation highlights the relevance of comprehensive genetic analyses in the diagnostics of ciliopathies.
Collapse
Affiliation(s)
- Susanne Roosing
- Laboratory for Pediatric Brain Disease, New York Genome Center, Howard Hughes Medical Institute, The Rockefeller University, New York, New York, USA
| | - Marta Romani
- IRCCS Casa Sollievo della Sofferenza, Mendel Institute, San Giovanni Rotondo, Italy
| | - Mala Isrie
- Department of Human Genetics, Laboratory for the Genetics of Cognition, Center for Human Genetics, KU Leuven, Belgium
| | - Rasim Ozgur Rosti
- Department of Neurosciences, University of California San Diego (UCSD), La Jolla, California, USA
| | - Alessia Micalizzi
- IRCCS Casa Sollievo della Sofferenza, Mendel Institute, San Giovanni Rotondo, Italy
- Department of Biological and Environmental Science, University of Messina, Messina, Italy
| | - Damir Musaev
- Department of Neurosciences, University of California San Diego (UCSD), La Jolla, California, USA
| | - Tommaso Mazza
- IRCCS Casa Sollievo della Sofferenza, Mendel Institute, San Giovanni Rotondo, Italy
| | - Lihadh Al-gazali
- Department of Pediatrics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Umut Altunoglu
- Medical Genetics Department, İstanbul Medical Faculty, İstanbul University, İstanbul, Turkey
| | - Eugen Boltshauser
- Division of Pediatric Neurology, University Children's Hospital, Zurich, Switzerland
| | - Stefano D'Arrigo
- Developmental Neurology Division, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Bart De Keersmaecker
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
- Department of Obstetrics and Gynecology, AZ Groeninge, Kortrijk, Belgium
| | - Hülya Kayserili
- Medical Genetics Department, Koç University School of Medicine (KUSOM), Istanbul, Turkey
| | | | - Ichraf Kraoua
- Department of Child and Adolescent Neurology, National Institute Mongi Ben Hmida of Neurology of Tunis, La Rabta, Tunisia
| | - Paul R Mark
- Spectrum Health Medical Genetics, Grand Rapids, Michigan, USA
| | - Trudy McKanna
- Spectrum Health Medical Genetics, Grand Rapids, Michigan, USA
| | | | - Philippe Moerman
- Department of Pathology, University Hospitals Leuven, Leuven, Belgium
| | - Andrea Poretti
- Division of Pediatric Neurology, University Children's Hospital, Zurich, Switzerland
- Section of Pediatric Neuroradiology, Division of Pediatric Radiology, The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Ratna Puri
- Center of Medical Genetics, Sir Ganga Ram Hospital, Rajinder Nagar, New Delhi, India
| | - Hilde Van Esch
- Department of Human Genetics, Laboratory for the Genetics of Cognition, Center for Human Genetics, KU Leuven, Belgium
| | - Joseph G Gleeson
- Laboratory for Pediatric Brain Disease, New York Genome Center, Howard Hughes Medical Institute, The Rockefeller University, New York, New York, USA
- Department of Neurosciences, University of California San Diego (UCSD), La Jolla, California, USA
- Neurogenetics Laboratory, Howard Hughes Medical Institute, Chevy Chase, Maryland, USA
| | - Enza Maria Valente
- Section of Neurosciences, Department of Medicine and Surgery, University of Salerno, Salerno, Italy
| |
Collapse
|
41
|
Paige Taylor S, Kunova Bosakova M, Varecha M, Balek L, Barta T, Trantirek L, Jelinkova I, Duran I, Vesela I, Forlenza KN, Martin JH, Hampl A, Bamshad M, Nickerson D, Jaworski ML, Song J, Ko HW, Cohn DH, Krakow D, Krejci P. An inactivating mutation in intestinal cell kinase, ICK, impairs hedgehog signalling and causes short rib-polydactyly syndrome. Hum Mol Genet 2016; 25:3998-4011. [PMID: 27466187 DOI: 10.1093/hmg/ddw240] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 06/27/2016] [Accepted: 06/29/2016] [Indexed: 12/30/2022] Open
Abstract
The short rib polydactyly syndromes (SRPS) are a group of recessively inherited, perinatal-lethal skeletal disorders primarily characterized by short ribs, shortened long bones, varying types of polydactyly and concomitant visceral abnormalities. Mutations in several genes affecting cilia function cause SRPS, revealing a role for cilia function in skeletal development. To identify additional SRPS genes and discover novel ciliary molecules required for normal skeletogenesis, we performed exome sequencing in a cohort of patients and identified homozygosity for a missense mutation, p.E80K, in Intestinal Cell Kinase, ICK, in one SRPS family. The p.E80K mutation abolished serine/threonine kinase activity, resulting in altered ICK subcellular and ciliary localization, increased cilia length, aberrant cartilage growth plate structure, defective Hedgehog and altered ERK signalling. These data identify ICK as an SRPS-associated gene and reveal that abnormalities in signalling pathways contribute to defective skeletogenesis.
Collapse
Affiliation(s)
- S Paige Taylor
- Department of Human Genetics, University of California Los Angeles, Los Angeles, CA 90095, USA
| | | | - Miroslav Varecha
- Department of Biology, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic
| | - Lukas Balek
- Department of Biology, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic
| | - Tomas Barta
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic
| | - Lukas Trantirek
- Central European Institute of Technology, Masaryk University, Kamenice 753/5, 62500 Brno, Czech Republic
| | - Iva Jelinkova
- Department of Biology, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic
| | - Ivan Duran
- Department of Orthopaedic Surgery.,Department of Human Genetics.,Department of Obstetrics and Gynecology, Orthopaedic Institute for Children, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Iva Vesela
- Institute of Experimental Biology, Masaryk University, 62500 Brno, Czech Republic
| | - Kimberly N Forlenza
- Department of Orthopaedic Surgery.,Department of Human Genetics.,Department of Obstetrics and Gynecology, Orthopaedic Institute for Children, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Jorge H Martin
- Department of Orthopaedic Surgery.,Department of Human Genetics.,Department of Obstetrics and Gynecology, Orthopaedic Institute for Children, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Ales Hampl
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic
| | | | - Michael Bamshad
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA.,Division of Genetic Medicine, Seattle Children's Hospital, Seattle, WA 98105, USA.,Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
| | - Deborah Nickerson
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
| | | | - Jieun Song
- College of Pharmacy, Dongguk University-Seoul, Goyang 410-820, Korea
| | - Hyuk Wan Ko
- College of Pharmacy, Dongguk University-Seoul, Goyang 410-820, Korea
| | - Daniel H Cohn
- Department of Orthopaedic Surgery.,International Skeletal Dysplasia Registry, University of California Los Angeles, Los Angeles, CA 90095, USA.,Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Deborah Krakow
- Department of Human Genetics, University of California Los Angeles, Los Angeles, CA 90095, USA .,Department of Orthopaedic Surgery.,International Skeletal Dysplasia Registry, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Pavel Krejci
- Department of Biology, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic.,Department of Orthopaedic Surgery.,International Clinical Research Center, St. Anne's University Hospital, 65691 Brno, Czech Republic
| |
Collapse
|
42
|
Wang L, Lee K, Malonis R, Sanchez I, Dynlacht BD. Tethering of an E3 ligase by PCM1 regulates the abundance of centrosomal KIAA0586/Talpid3 and promotes ciliogenesis. eLife 2016; 5. [PMID: 27146717 PMCID: PMC4858382 DOI: 10.7554/elife.12950] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 04/18/2016] [Indexed: 12/15/2022] Open
Abstract
To elucidate the role of centriolar satellites in ciliogenesis, we deleted the gene encoding the PCM1 protein, an integral component of satellites. PCM1 null human cells show marked defects in ciliogenesis, precipitated by the loss of specific proteins from satellites and their relocation to centrioles. We find that an amino-terminal domain of PCM1 can restore ciliogenesis and satellite localization of certain proteins, but not others, pinpointing unique roles for PCM1 and a group of satellite proteins in cilium assembly. Remarkably, we find that PCM1 is essential for tethering the E3 ligase, Mindbomb1 (Mib1), to satellites. In the absence of PCM1, Mib1 destabilizes Talpid3 through poly-ubiquitylation and suppresses cilium assembly. Loss of PCM1 blocks ciliogenesis by abrogating recruitment of ciliary vesicles associated with the Talpid3-binding protein, Rab8, which can be reversed by inactivating Mib1. Thus, PCM1 promotes ciliogenesis by tethering a key E3 ligase to satellites and restricting it from centrioles. DOI:http://dx.doi.org/10.7554/eLife.12950.001
Collapse
Affiliation(s)
- Lei Wang
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, United States
| | - Kwanwoo Lee
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, United States
| | - Ryan Malonis
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, United States
| | - Irma Sanchez
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, United States
| | - Brian D Dynlacht
- Department of Pathology, New York University Cancer Institute, New York University School of Medicine, New York, United States
| |
Collapse
|