1
|
Rodgers J, Richmond CM, McGaughran J. Delineating the CCDC22-related Ritscher-Schinzel syndrome phenotype in the original family. Am J Med Genet A 2022; 188:3324-3330. [PMID: 36073196 DOI: 10.1002/ajmg.a.62963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 07/18/2022] [Accepted: 07/23/2022] [Indexed: 01/31/2023]
Abstract
Pathogenic variants in CCDC22 were initially described in 2012 in a large Australian family with intellectual disability and were subsequently noted to cause a phenotype consistent with the previously described Ritscher-Schinzel syndrome (RSS). The phenotypes of the original family were not described in detail and remains limited phenotypic data reported in medical literature. We detail the phenotypes of the original family, including newly diagnosed family members. With these eight phenotypic descriptions, more than triple the number of individuals for whom detailed clinical information is available. In addition to typical facies, common phenotypic features included intellectual disability, congenital heart disease and posterior fossa malformations, postnatal short stature, ectodermal abnormalities, and digital anomalies as previously described. Spinal curvature and genital anomalies were seen in most patients, while gastrointestinal features and disturbed sleep were also recurrently seen. We propose a possible mechanism linking the familial variant to a diagnosis of sarcoidosis in one individual. Given the clinical and genetic heterogeneity of RSS, we suggest a dyadic naming convention.
Collapse
Affiliation(s)
- Jonathan Rodgers
- Genetic Health Queensland, Royal Brisbane & Women's Hospital, Brisbane, Queensland, Australia.,School of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Christopher M Richmond
- Genetic Health Queensland, Royal Brisbane & Women's Hospital, Brisbane, Queensland, Australia.,School of Medicine, Griffith University, Gold Coast, Queensland, Australia
| | - Julie McGaughran
- Genetic Health Queensland, Royal Brisbane & Women's Hospital, Brisbane, Queensland, Australia.,School of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| |
Collapse
|
2
|
Isobe A, Maeda N, Fujita H, Banno S, Kageyama T, Hatabu N, Sato R, Suzuki E, Miharu M, Komiyama O, Nakashima M, Matsunaga T, Nishimura G, Yamazawa K. Metacarpophalangeal pattern profile analysis for a 3-month-old infant with Feingold syndrome 2. Am J Med Genet A 2020; 185:952-954. [PMID: 33369046 DOI: 10.1002/ajmg.a.62038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/13/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Aiko Isobe
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Naonori Maeda
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Hisayo Fujita
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Sari Banno
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Tomoka Kageyama
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Naomi Hatabu
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Rieko Sato
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Eri Suzuki
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Masashi Miharu
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Osamu Komiyama
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Moeko Nakashima
- Medical Genetics Center, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Tatsuo Matsunaga
- Medical Genetics Center, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Gen Nishimura
- Center for Intractable Diseases, Saitama Medical University Hospital, Saitama, Japan
| | - Kazuki Yamazawa
- Department of Pediatrics, National Hospital Organization Tokyo Medical Center, Tokyo, Japan.,Medical Genetics Center, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| |
Collapse
|
3
|
Kato K, Oka Y, Muramatsu H, Vasilev FF, Otomo T, Oishi H, Kawano Y, Kidokoro H, Nakazawa Y, Ogi T, Takahashi Y, Saitoh S. Biallelic VPS35L pathogenic variants cause 3C/Ritscher-Schinzel-like syndrome through dysfunction of retriever complex. J Med Genet 2019; 57:245-253. [PMID: 31712251 DOI: 10.1136/jmedgenet-2019-106213] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 01/11/2023]
Abstract
BACKGROUND 3C/Ritscher-Schinzel syndrome is characterised by congenital cranio-cerebello-cardiac dysplasia, where CCDC22 and WASHC5 are accepted as the causative genes. In combination with the retromer or retriever complex, these genes play a role in endosomal membrane protein recycling. We aimed to identify the gene abnormality responsible for the pathogenicity in siblings with a 3C/Ritscher-Schinzel-like syndrome, displaying cranio-cerebello-cardiac dysplasia, coloboma, microphthalmia, chondrodysplasia punctata and complicated skeletal malformation. METHODS Exome sequencing was performed to identify pathogenic variants. Cellular biological analyses and generation of knockout mice were carried out to elucidate the gene function and pathophysiological significance of the identified variants. RESULTS We identified compound heterozygous pathogenic variants (c.1097dup; p.Cys366Trpfs*28 and c.2755G>A; p.Ala919Thr) in the VPS35L gene, which encodes a core protein of the retriever complex. The identified missense variant lacked the ability to form the retriever complex, and the frameshift variant induced non-sense-mediated mRNA decay, thereby confirming biallelic loss of function of VPS35L. In addition, VPS35L knockout cells showed decreased autophagic function in nutrient-rich and starvation conditions, as well as following treatment with Torin 1. We also generated Vps35l-/- mice and demonstrated that they were embryonic lethal at an early stage, between E7.5 and E10.5. CONCLUSIONS Our results suggest that biallelic loss-of-function variants in VPS35L underlies 3C/Ritscher-Schinzel-like syndrome. Furthermore, VPS35L is necessary for autophagic function and essential for early embryonic development. The data presented here provide a new insight into the critical role of the retriever complex in fetal development.
Collapse
Affiliation(s)
- Kohji Kato
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi, Japan.,Department of Pediatrics, Nagoya University Graduate School of Medicine Faculty of Medicine, Nagoya, Aichi, Japan.,Department of Pediatrics, Toyota Memorial Hospital, Toyota, Aichi, Japan
| | - Yasuyoshi Oka
- Department of Human Genetics and Molecular Genetics, Nagoya University, Nagoya, Aichi, Japan.,Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Aichi, Japan
| | - Hideki Muramatsu
- Department of Pediatrics, Nagoya University Graduate School of Medicine Faculty of Medicine, Nagoya, Aichi, Japan
| | - Filipp F Vasilev
- Department of Pathophysiology and Metabolism, Kawasaki Medical School, Kurashiki, Okayama, Japan.,International Research Fellow of Japan Society for the Promotion of Science (Postdoctoral Fellowships for Research in Japan (Standard)), Tokyo, Japan
| | - Takanobu Otomo
- Department of Pathophysiology and Metabolism, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - Hisashi Oishi
- Department of Comparative and Experimental Medicine, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi, Japan
| | - Yoshihiko Kawano
- Department of Pediatrics, Toyota Memorial Hospital, Toyota, Aichi, Japan
| | - Hiroyuki Kidokoro
- Department of Pediatrics, Nagoya University Graduate School of Medicine Faculty of Medicine, Nagoya, Aichi, Japan.,Department of Pediatrics, Toyota Memorial Hospital, Toyota, Aichi, Japan
| | - Yuka Nakazawa
- Department of Human Genetics and Molecular Genetics, Nagoya University, Nagoya, Aichi, Japan.,Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Aichi, Japan
| | - Tomoo Ogi
- Department of Human Genetics and Molecular Genetics, Nagoya University, Nagoya, Aichi, Japan.,Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Aichi, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine Faculty of Medicine, Nagoya, Aichi, Japan
| | - Shinji Saitoh
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Aichi, Japan
| |
Collapse
|
4
|
Wagner MW, Poretti A, Benson JE, Huisman TAGM. Neuroimaging Findings in Pediatric Genetic Skeletal Disorders: A Review. J Neuroimaging 2016; 27:162-209. [PMID: 28000960 DOI: 10.1111/jon.12413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 11/01/2016] [Indexed: 12/15/2022] Open
Abstract
Genetic skeletal disorders (GSDs) are a heterogeneous group characterized by an intrinsic abnormality in growth and (re-)modeling of cartilage and bone. A large subgroup of GSDs has additional involvement of other structures/organs beside the skeleton, such as the central nervous system (CNS). CNS abnormalities have an important role in long-term prognosis of children with GSDs and should consequently not be missed. Sensitive and specific identification of CNS lesions while evaluating a child with a GSD requires a detailed knowledge of the possible associated CNS abnormalities. Here, we provide a pattern-recognition approach for neuroimaging findings in GSDs guided by the obvious skeletal manifestations of GSD. In particular, we summarize which CNS findings should be ruled out with each GSD. The diseases (n = 180) are classified based on the skeletal involvement (1. abnormal metaphysis or epiphysis, 2. abnormal size/number of bones, 3. abnormal shape of bones and joints, and 4. abnormal dynamic or structural changes). For each disease, skeletal involvement was defined in accordance with Online Mendelian Inheritance in Man. Morphological CNS involvement has been described based on extensive literature search. Selected examples will be shown based on prevalence of the diseases and significance of the CNS involvement. CNS involvement is common in GSDs. A wide spectrum of morphological abnormalities is associated with GSDs. Early diagnosis of CNS involvement is important in the management of children with GSDs. This pattern-recognition approach aims to assist and guide physicians in the diagnostic work-up of CNS involvement in children with GSDs and their management.
Collapse
Affiliation(s)
- Matthias W Wagner
- Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, MD.,Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Andrea Poretti
- Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jane E Benson
- Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, MD
| | - Thierry A G M Huisman
- Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, MD
| |
Collapse
|
5
|
Sargar KM, Radmanesh A, Herman TE, Siegel MJ. 3-C Ritscher-Schinzel syndrome with spinal subarachnoid cyst. J Perinatol 2015; 35:233-4. [PMID: 25712599 DOI: 10.1038/jp.2014.220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 11/05/2014] [Indexed: 11/09/2022]
Affiliation(s)
- K M Sargar
- St Louis Children's Hospital Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO, USA
| | - A Radmanesh
- St Louis Children's Hospital Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO, USA
| | - T E Herman
- St Louis Children's Hospital Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO, USA
| | - M J Siegel
- St Louis Children's Hospital Department of Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO, USA
| |
Collapse
|