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Corona-Rivera JR, Martínez-Duncker I, Morava E, Ranatunga W, Salinas-Marin R, González-Jaimes AM, Castillo-Reyes KA, Peña-Padilla C, Bobadilla-Morales L, Corona-Rivera A, Orozco-Vela M, Brukman-Jiménez SA. TRAPPC11-CDG muscular dystrophy: Review of 54 cases including a novel patient. Mol Genet Metab 2024; 142:108469. [PMID: 38564972 DOI: 10.1016/j.ymgme.2024.108469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/25/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024]
Abstract
The trafficking protein particle (TRAPP) complex is a multisubunit protein complex that functions as a tethering factor involved in intracellular trafficking. TRAPPC11, a crucial subunit of this complex, is associated with pathogenic variants that cause a spectrum of disease, which can range from a limb girdle muscular dystrophy (LGMD) to developmental disability with muscle disease, movement disorder and global developmental delay (GDD)/intellectual disability (ID), or even a congenital muscular dystrophy (CMD). We reviewed the phenotype of all reported individuals with TRAPPC11-opathies, including an additional Mexican patient with novel compound heterozygous missense variants in TRAPPC11 (c.751 T > C and c.1058C > G), restricted to the Latino population. In these 54 patients muscular dystrophy signs are common (early onset muscle weakness, increased serum creatine kinase levels, and dystrophic changes in muscle biopsy). They present two main phenotypes, one with a slowly progressive LGMD with or without GDD/ID (n = 12), and another with systemic involvement characterized by short stature, GDD/ID, microcephaly, hypotonia, poor speech, seizures, cerebral atrophy, cerebellar abnormalities, movement disorder, scoliosis, liver disease, and cataracts (n = 42). In 6 of them CMD was identified. Obstructive hydrocephaly, retrocerebellar cyst, and talipes equinovarus found in the individual reported here has not been described in TRAPPC11 deficiency. As in previous patients, membrane trafficking assays in our patient showed defective abnormal endoplasmic reticulum-Golgi transport as well as decreased expression of LAMP2, and ICAM-1 glycoproteins. This supports previous statements that TRAPPC11-opathies are in fact a congenital disorder of glycosylation (CDG) with muscular dystrophy.
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Affiliation(s)
- Jorge Román Corona-Rivera
- Center for Registry and Research on Congenital Anomalies (CRIAC), Division of Pediatrics, Service of Genetics and Cytogenetic Unit, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Jalisco, Mexico; "Dr. Enrique Corona-Rivera" Institute of Human Genetics, Department of Molecular Biology and Genomics, Health Sciences University Centre, University of Guadalajara, Guadalajara, Jalisco, Mexico.
| | - Iván Martínez-Duncker
- Laboratorio de Glicobiología Humana y Diagnóstico Molecular, Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico.
| | - Eva Morava
- Department of Clinical Genomics and Laboratory of Medical Pathology, Mayo Clinic, Rochester, MN, USA
| | - Wasantha Ranatunga
- Department of Clinical Genomics and Laboratory of Medical Pathology, Mayo Clinic, Rochester, MN, USA
| | - Roberta Salinas-Marin
- Laboratorio de Glicobiología Humana y Diagnóstico Molecular, Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
| | - Ana María González-Jaimes
- Laboratorio de Glicobiología Humana y Diagnóstico Molecular, Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
| | - Katia Alejandra Castillo-Reyes
- Center for Registry and Research on Congenital Anomalies (CRIAC), Division of Pediatrics, Service of Genetics and Cytogenetic Unit, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Christian Peña-Padilla
- Center for Registry and Research on Congenital Anomalies (CRIAC), Division of Pediatrics, Service of Genetics and Cytogenetic Unit, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Lucina Bobadilla-Morales
- Center for Registry and Research on Congenital Anomalies (CRIAC), Division of Pediatrics, Service of Genetics and Cytogenetic Unit, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Jalisco, Mexico; "Dr. Enrique Corona-Rivera" Institute of Human Genetics, Department of Molecular Biology and Genomics, Health Sciences University Centre, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Alfredo Corona-Rivera
- Center for Registry and Research on Congenital Anomalies (CRIAC), Division of Pediatrics, Service of Genetics and Cytogenetic Unit, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Jalisco, Mexico; "Dr. Enrique Corona-Rivera" Institute of Human Genetics, Department of Molecular Biology and Genomics, Health Sciences University Centre, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Mireya Orozco-Vela
- Center for Registry and Research on Congenital Anomalies (CRIAC), Division of Pediatrics, Service of Genetics and Cytogenetic Unit, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Sinhue Alejandro Brukman-Jiménez
- Center for Registry and Research on Congenital Anomalies (CRIAC), Division of Pediatrics, Service of Genetics and Cytogenetic Unit, "Dr. Juan I. Menchaca" Civil Hospital of Guadalajara, Guadalajara, Jalisco, Mexico
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2
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Magnani E, Nair AR, McBain I, Delaney P, Chu J, Sadler KC. Methods to Study Liver Disease Using Zebrafish Larvae. Methods Mol Biol 2024; 2707:43-69. [PMID: 37668904 DOI: 10.1007/978-1-0716-3401-1_3] [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] [Indexed: 09/06/2023]
Abstract
Liver disease affects millions of people worldwide, and the high morbidity and mortality is attributed in part to the paucity of treatment options. In many cases, liver injury self-resolves due to the remarkable regenerative capacity of the liver, but in cases when regeneration cannot compensate for the injury, inflammation and fibrosis occur, creating a setting for the emergence of liver cancer. Whole animal models are crucial for deciphering the basic biological underpinnings of liver biology and pathology and, importantly, for developing and testing new treatments for liver disease before it progresses to a terminal state. The cellular components and functions of the zebrafish liver are highly similar to mammals, and zebrafish develop many diseases that are observed in humans, including toxicant-induced liver injury, fatty liver, fibrosis, and cancer. Therefore, the widespread use of zebrafish larvae for studying the mechanisms of these pathologies and for developing potential treatments necessitates the optimization of experimental approaches to assess liver disease in this model. Here, we describe protocols using staining methods, imaging, and gene expression analysis to assess liver injury, fibrosis, and preneoplastic changes in the liver of larval zebrafish.
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Affiliation(s)
- Elena Magnani
- Program in Biology, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Anjana Ramdas Nair
- Program in Biology, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Ian McBain
- Program in Biology, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Patrice Delaney
- Program in Biology, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Jaime Chu
- Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kirsten C Sadler
- Program in Biology, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates.
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3
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Papaioannou P, Wallace MJ, Malhotra N, Mohler PJ, El Refaey M. Biochemical Structure and Function of TRAPP Complexes in the Cardiac System. JACC Basic Transl Sci 2023; 8:1599-1612. [PMID: 38205348 PMCID: PMC10774597 DOI: 10.1016/j.jacbts.2023.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/14/2023] [Indexed: 01/12/2024]
Abstract
Trafficking protein particle (TRAPP) is well reported to play a role in the trafficking of protein products within the Golgi and endoplasmic reticulum. Dysfunction in TRAPP has been associated with disorders in the nervous and cardiovascular systems, but the majority of literature focuses on TRAPP function in the nervous system solely. Here, we highlight the known pathways of TRAPP and hypothesize potential impacts of TRAPP dysfunction on the cardiovascular system, particularly the role of TRAPP as a guanine-nucleotide exchange factor for Rab1 and Rab11. We also review the various cardiovascular phenotypes associated with changes in TRAPP complexes and their subunits.
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Affiliation(s)
- Peter Papaioannou
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiac Surgery, Department of Surgery, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Michael J. Wallace
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Nipun Malhotra
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiac Surgery, Department of Surgery, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Peter J. Mohler
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Department of Physiology and Cell Biology, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiovascular Medicine, Department of Internal Medicine, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
| | - Mona El Refaey
- Frick Center for Heart Failure and Arrhythmia Research, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
- Division of Cardiac Surgery, Department of Surgery, College of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA
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Shimizu N, Shiraishi H, Hanada T. Zebrafish as a Useful Model System for Human Liver Disease. Cells 2023; 12:2246. [PMID: 37759472 PMCID: PMC10526867 DOI: 10.3390/cells12182246] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/31/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Liver diseases represent a significant global health challenge, thereby necessitating extensive research to understand their intricate complexities and to develop effective treatments. In this context, zebrafish (Danio rerio) have emerged as a valuable model organism for studying various aspects of liver disease. The zebrafish liver has striking similarities to the human liver in terms of structure, function, and regenerative capacity. Researchers have successfully induced liver damage in zebrafish using chemical toxins, genetic manipulation, and other methods, thereby allowing the study of disease mechanisms and the progression of liver disease. Zebrafish embryos or larvae, with their transparency and rapid development, provide a unique opportunity for high-throughput drug screening and the identification of potential therapeutics. This review highlights how research on zebrafish has provided valuable insights into the pathological mechanisms of human liver disease.
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Affiliation(s)
- Nobuyuki Shimizu
- Department of Cell Biology, Oita University Faculty of Medicine, Yufu 879-5593, Oita, Japan;
| | | | - Toshikatsu Hanada
- Department of Cell Biology, Oita University Faculty of Medicine, Yufu 879-5593, Oita, Japan;
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5
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Chang C, Li H, Zhang R. Zebrafish facilitate non-alcoholic fatty liver disease research: Tools, models and applications. Liver Int 2023; 43:1385-1398. [PMID: 37122203 DOI: 10.1111/liv.15601] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 04/14/2023] [Accepted: 04/20/2023] [Indexed: 05/02/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) has become an increasingly epidemic metabolic disease worldwide. NAFLD can gradually deteriorate from simple liver steatosis, inflammation and fibrosis to liver cirrhosis and/or hepatocellular carcinoma. Zebrafish are vertebrate animal models that are genetically and metabolically conserved with mammals and have unique advantages such as high fecundity, rapid development ex utero and optical transparency. These features have rendered zebrafish an emerging model system for liver diseases and metabolic diseases favoured by many researchers in recent years. In the present review, we summarize a series of tools for zebrafish NAFLD research and the models established through different dietary feeding, hepatotoxic chemical treatments and genetic manipulations via transgenic or genome editing technologies. We also discuss how zebrafish models facilitate NAFLD studies by providing novel insights into NAFLD pathogenesis, toxicology research, and drug evaluation and discovery.
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Affiliation(s)
- Cheng Chang
- School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Huicong Li
- School of Basic Medical Sciences, Wuhan University, Wuhan, China
| | - Ruilin Zhang
- School of Basic Medical Sciences, Wuhan University, Wuhan, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
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Ulhaq ZS, Ogino Y, Tse WKF. FGF8 rescues motor deficits in zebrafish model of limb-girdle muscular dystrophy R18. Biochem Biophys Res Commun 2023; 652:76-83. [PMID: 36827861 DOI: 10.1016/j.bbrc.2023.02.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 02/17/2023] [Indexed: 02/21/2023]
Abstract
Variants in the gene encoding trafficking protein particle complex 11 (TRAPPC11) cause limb-girdle muscular dystrophy R18 (LGMD R18). Although recently several genes related to myopathies have been identified, correlations between genetic causes and signaling events that lead from mutation to the disease phenotype are still mostly unclear. Here, we utilized zebrafish to model LGMD R18 by specifically inactivating trappc11 using antisense-mediated knockdown strategies and evaluated the resulting muscular phenotypes. Targeted ablation of trappc11 showed compromised skeletal muscle function due to muscle disorganization and myofibrosis. Our findings pinpoint that fish lacking functional trappc11 suppressed FGF8, which resulted in the aberrant activation of Notch signaling and eventually stimulated epithelial-mesenchymal transition (EMT) and fibrotic changes in the skeletal muscle. In summary, our study provides the role of FGF8 in the pathogenesis and its therapeutic potential of LGMD R18.
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Affiliation(s)
- Zulvikar Syambani Ulhaq
- Laboratory of Developmental Disorders and Toxicology, Center for Promotion of International Education and Research, Faculty of Agriculture, Kyushu University, Fukuoka, 8190395, Japan; Research Center for Pre-clinical and Clinical Medicine, National Research and Innovation Agency, Republic of Indonesia, Cibinong, 16911, Indonesia.
| | - Yukiko Ogino
- Laboratory of Aquatic Molecular Developmental Biology, Center for Promotion of International Education and Research, Faculty of Agriculture, Kyushu University, Fukuoka, 8190395, Japan
| | - William Ka Fai Tse
- Laboratory of Developmental Disorders and Toxicology, Center for Promotion of International Education and Research, Faculty of Agriculture, Kyushu University, Fukuoka, 8190395, Japan.
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7
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Dong X, Liang Z, Zhang J, Zhang Q, Xu Y, Zhang Z, Zhang L, Zhang B, Zhao Y. Trappc1 deficiency impairs thymic epithelial cell development by breaking endoplasmic reticulum homeostasis. Eur J Immunol 2022; 52:1789-1804. [PMID: 35908180 DOI: 10.1002/eji.202249915] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 06/28/2022] [Accepted: 07/26/2022] [Indexed: 11/05/2022]
Abstract
Thymic epithelial cells (TECs) are important for T cell development and immune tolerance establishment. Although comprehensive molecular regulation of TEC development has been studied, the role of transport protein particle complexes (Trappcs) in TECs is not clear. Using TEC-specific homozygous or heterozygous Trappc1 deleted mice model, we found that Trappc1 deficiency caused severe thymus atrophy with decreased cell number and blocked maturation of TECs. Mice with a TEC-specific Trappc1 deletion show poor thymic T cell output and have a greater percentage of activated/memory T cells, suffered from spontaneous autoimmune disorders. Our RNA-seq and molecular studies indicated that the decreased endoplasmic reticulum (ER) and Golgi apparatus, enhanced unfolded protein response (UPR) and subsequent Atf4-CHOP-mediated apoptosis, and reactive oxygen species (ROS)-mediated ferroptosis coordinately contributed to the reduction of Trappc1-deleted TECs. Additionally, reduced Aire+ mTECs accompanied by the decreased expression of Irf4, Irf8, and Tbx21 in Trappc1 deficiency mTECs, may further coordinately block the tissue-restricted antigen expression. In this study, we reveal that Trappc1 plays an indispensable role in TEC development and maturation and provide evidence for the importance of inter-organelle traffic and ER homeostasis in TEC development. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Xue Dong
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences.,University of Chinese Academy of Sciences
| | - Zhanfeng Liang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences.,University of Chinese Academy of Sciences.,Beijing Institute for Stem Cell and Regeneration
| | - Jiayu Zhang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences.,University of Chinese Academy of Sciences
| | - Qian Zhang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences.,University of Chinese Academy of Sciences
| | - Yanan Xu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences.,University of Chinese Academy of Sciences
| | - Zhaoqi Zhang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences.,University of Chinese Academy of Sciences
| | - Lianfeng Zhang
- Key Laboratory of Human Diseases and Comparative Medicine, Ministry of Health, Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences
| | - Baojun Zhang
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University
| | - Yong Zhao
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences.,University of Chinese Academy of Sciences.,Beijing Institute for Stem Cell and Regeneration
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Munot P, McCrea N, Torelli S, Manzur A, Sewry C, Chambers D, Feng L, Ala P, Zaharieva I, Ragge N, Roper H, Marton T, Cox P, Milev MP, Liang WC, Maruyama S, Nishino I, Sacher M, Phadke R, Muntoni F. TRAPPC11-related muscular dystrophy with hypoglycosylation of alpha-dystroglycan in skeletal muscle and brain. Neuropathol Appl Neurobiol 2021; 48:e12771. [PMID: 34648194 DOI: 10.1111/nan.12771] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 08/23/2021] [Accepted: 09/12/2021] [Indexed: 11/30/2022]
Abstract
AIMS TRAPPC11, a subunit of the transport protein particle (TRAPP) complex, is important for complex integrity and anterograde membrane transport from the endoplasmic reticulum (ER) to the ER-Golgi intermediate compartment. Several individuals with TRAPPC11 mutations have been reported with muscle weakness and other features including brain, liver, skeletal and eye involvement. A detailed analysis of brain and muscle pathology will further our understanding of the presentation and aetiology of TRAPPC11 disease. METHODS We describe five cases of early-onset TRAPPC11-related muscular dystrophy with a systematic review of muscle pathology in all five individuals, post-mortem brain pathology findings in one and membrane trafficking assays in another. RESULTS All affected individuals presented in infancy with muscle weakness, motor delay and elevated serum creatine kinase (CK). Additional features included cataracts, liver disease, intellectual disability, cardiomyopathy, movement disorder and structural brain abnormalities. Muscle pathology in all five revealed dystrophic changes, universal hypoglycosylation of alpha-dystroglycan and variably reduced dystrophin-associated complex proteins. Membrane trafficking assays showed defective Golgi trafficking in one individual. Neuropathological examination of one individual revealed cerebellar atrophy, granule cell hypoplasia, Purkinje cell (PC) loss, degeneration and dendrite dystrophy, reduced alpha-dystroglycan (IIH6) expression in PC and dentate neurones and absence of neuronal migration defects. CONCLUSIONS This report suggests that recessive mutations in TRAPPC11 are linked to muscular dystrophies with hypoglycosylation of alpha-dystroglycan. The structural cerebellar involvement that we document for the first time resembles the neuropathology reported in N-linked congenital disorders of glycosylation (CDG) such as PMM2-CDG, suggesting defects in multiple glycosylation pathways in this condition.
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Affiliation(s)
- Pinki Munot
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Nadine McCrea
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Silvia Torelli
- UCL, Dubowitz Neuromuscular Centre, Great Ormond Street Institute of Child Health, London, UK
| | - Adnan Manzur
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Caroline Sewry
- Dubowitz Neuromuscular Centre, Division of Neuropathology, UCL Institute of Neurology, London, UK
| | - Darren Chambers
- Dubowitz Neuromuscular Centre, Division of Neuropathology, UCL Institute of Neurology, London, UK
| | - Lucy Feng
- Dubowitz Neuromuscular Centre, Division of Neuropathology, UCL Institute of Neurology, London, UK
| | - Pierpaolo Ala
- UCL, Dubowitz Neuromuscular Centre, Great Ormond Street Institute of Child Health, London, UK
| | - Irina Zaharieva
- UCL, Dubowitz Neuromuscular Centre, Great Ormond Street Institute of Child Health, London, UK
| | - Nicola Ragge
- Birmingham Women's and Children's NHS Foundation Hospital Trust, West Midlands Regional Clinical Genetics Service and Birmingham Health Partners, Birmingham, UK
| | - Helen Roper
- Department of Paediatrics, Birmingham Heartlands Hospital, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Tamas Marton
- Department of Histopathology, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Phil Cox
- Department of Histopathology, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Miroslav P Milev
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Wen-Chen Liang
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Shinsuke Maruyama
- Department of Paediatrics, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Centre of Neurology and Psychiatry, Kodaira, Japan
| | - Michael Sacher
- Department of Biology, Concordia University, Montreal, Quebec, Canada.,Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
| | - Rahul Phadke
- Dubowitz Neuromuscular Centre, Division of Neuropathology, UCL Institute of Neurology, London, UK.,Division of Neuropathology, University College London Hospitals NHS Foundation Trust National Hospital for Neurology and Neurosurgery, London, UK
| | - Francesco Muntoni
- Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK.,UCL Great Ormond Street Institute of Child Health, NIHR Great Ormond Street Hospital Biomedical Research Centre, London, UK
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9
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Chen Q, Zheng W, Xu H, Yang Y, Song Z, Yuan L, Deng H. Digenic Variants in the TTN and TRAPPC11 Genes Co-segregating With a Limb-Girdle Muscular Dystrophy in a Han Chinese Family. Front Neurosci 2021; 15:601757. [PMID: 33746696 PMCID: PMC7969792 DOI: 10.3389/fnins.2021.601757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 02/10/2021] [Indexed: 11/22/2022] Open
Abstract
Limb-girdle muscular dystrophies (LGMD) are hereditary genetic disorders characterized by progressive muscle impairment which predominantly include proximal muscle weaknesses in the pelvic and shoulder girdles. This article describes an attempt to identify genetic cause(s) for a LGMD pedigree via a combination of whole exome sequencing and Sanger sequencing. Digenic variants, the titin gene (TTN) c.19481T>G (p.Leu6494Arg) and the trafficking protein particle complex 11 gene (TRAPPC11) c.3092C>G (p.Pro1031Arg), co-segregated with the disease phenotype in the family, suggesting their possible pathogenicity.
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Affiliation(s)
- Qian Chen
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Department of Pathology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Wen Zheng
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Hongbo Xu
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yan Yang
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Zhi Song
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lamei Yuan
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Disease Genome Research Center, Central South University, Changsha, China
| | - Hao Deng
- Center for Experimental Medicine, The Third Xiangya Hospital, Central South University, Changsha, China.,Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China.,Disease Genome Research Center, Central South University, Changsha, China
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10
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A Great Catch for Investigating Inborn Errors of Metabolism-Insights Obtained from Zebrafish. Biomolecules 2020; 10:biom10091352. [PMID: 32971894 PMCID: PMC7564250 DOI: 10.3390/biom10091352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/18/2020] [Accepted: 09/19/2020] [Indexed: 12/14/2022] Open
Abstract
Inborn errors of metabolism cause abnormal synthesis, recycling, or breakdown of amino acids, neurotransmitters, and other various metabolites. This aberrant homeostasis commonly causes the accumulation of toxic compounds or depletion of vital metabolites, which has detrimental consequences for the patients. Efficient and rapid intervention is often key to survival. Therefore, it requires useful animal models to understand the pathomechanisms and identify promising therapeutic drug targets. Zebrafish are an effective tool to investigate developmental mechanisms and understanding the pathophysiology of disorders. In the past decades, zebrafish have proven their efficiency for studying genetic disorders owing to the high degree of conservation between human and zebrafish genes. Subsequently, several rare inherited metabolic disorders have been successfully investigated in zebrafish revealing underlying mechanisms and identifying novel therapeutic targets, including methylmalonic acidemia, Gaucher’s disease, maple urine disorder, hyperammonemia, TRAPPC11-CDGs, and others. This review summarizes the recent impact zebrafish have made in the field of inborn errors of metabolism.
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11
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Al-Deri N, Okur V, Ahimaz P, Milev M, Valivullah Z, Hagen J, Sheng Y, Chung W, Sacher M, Ganapathi M. A novel homozygous variant in TRAPPC2L results in a neurodevelopmental disorder and disrupts TRAPP complex function. J Med Genet 2020; 58:592-601. [PMID: 32843486 DOI: 10.1136/jmedgenet-2020-107016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/25/2020] [Accepted: 06/26/2020] [Indexed: 11/04/2022]
Abstract
BACKGROUND Next-generation sequencing has facilitated the diagnosis of neurodevelopmental disorders with variable and non-specific clinical findings. Recently, a homozygous missense p.(Asp37Tyr) variant in TRAPPC2L, a core subunit of TRAPP complexes which function as tethering factors during membrane trafficking, was reported in two unrelated individuals with neurodevelopmental delay, post-infectious encephalopathy-associated developmental arrest, tetraplegia and accompanying rhabdomyolysis. METHODS We performed whole genome sequencing on members of an Ashkenazi Jewish pedigree to identify the underlying genetic aetiology of global developmental delay/intellectual disability in three affected siblings. To assess the effect of the identified TRAPPC2L variant, we performed biochemical and cell biological functional studies on the TRAPPC2L protein. RESULTS A rare homozygous predicted deleterious missense variant, p.(Ala2Gly), in TRAPPC2L was identified in the affected siblings and it segregated with the neurodevelopmental phenotype within the family. Using a yeast two-hybrid assay and in vitro binding, we demonstrate that the p.(Ala2Gly) variant, but not the p.(Asp37Tyr) variant, disrupted the interaction between TRAPPC2L and another core TRAPP protein, TRAPPC6a. Size exclusion chromatography suggested that this variant affects the assembly of TRAPP complexes. Employing two different membrane trafficking assays using fibroblasts from one of the affected siblings, we found a delay in traffic into and out of the Golgi. Similar to the p.(Asp37Tyr) variant, the p.(Ala2Gly) variant resulted in an increase in the levels of active RAB11. CONCLUSION Our data fill in a gap in the knowledge of TRAPP architecture with TRAPPC2L interacting with TRAPPC6a, positioning it as a putative adaptor for other TRAPP subunits. Collectively, our findings support the pathogenicity of the TRAPPC2L p.(Ala2Gly) variant.
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Affiliation(s)
- Noraldin Al-Deri
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Volkan Okur
- Department of Pediatrics, Columbia University Medical Center, New York, New York, USA
| | - Priyanka Ahimaz
- Department of Pediatrics, Columbia University Medical Center, New York, New York, USA
| | - Miroslav Milev
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Zaheer Valivullah
- Center for Mendelian Genomics, Broad Institute Harvard, Cambridge, Massachusetts, USA
| | - Jacob Hagen
- Department of Biomedical Sciences, Columbia University Medical Center, New York, New York, USA
| | - Yufeng Sheng
- Department of Biomedical Sciences, Columbia University Medical Center, New York, New York, USA
| | - Wendy Chung
- Department of Pediatrics, Columbia University Medical Center, New York, New York, USA.,Department of Medicine, Columbia University Medical Center, New York, New York, USA
| | - Michael Sacher
- Department of Biology, Concordia University, Montreal, Quebec, Canada .,Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
| | - Mythily Ganapathi
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, New York, USA
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12
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Kaur P, Kadavigere R, Girisha KM, Shukla A. Recurrent bi-allelic splicing variant c.454+3A>G in TRAPPC4 is associated with progressive encephalopathy and muscle involvement. Brain 2020; 143:e29. [PMID: 32125366 DOI: 10.1093/brain/awaa046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- Parneet Kaur
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Rajagopal Kadavigere
- Department of Radiodiagnosis and Imaging, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Katta Mohan Girisha
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Anju Shukla
- Department of Medical Genetics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India
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13
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Milev MP, Stanga D, Schänzer A, Nascimento A, Saint-Dic D, Ortez C, Natera-de Benito D, Barrios DG, Colomer J, Badosa C, Jou C, Gallano P, Gonzalez-Quereda L, Töpf A, Johnson K, Straub V, Hahn A, Sacher M, Jimenez-Mallebrera C. Characterization of three TRAPPC11 variants suggests a critical role for the extreme carboxy terminus of the protein. Sci Rep 2019; 9:14036. [PMID: 31575891 PMCID: PMC6773699 DOI: 10.1038/s41598-019-50415-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 09/11/2019] [Indexed: 12/23/2022] Open
Abstract
TRAPPC11 was identified as a component of the TRAPP III complex that functions in membrane trafficking and autophagy. Variants in TRAPPC11 have been reported to be associated with a broad spectrum of phenotypes but all affected individuals display muscular pathology. Identifying additional variants will further our understanding of the clinical spectrum of phenotypes and will reveal regions of the protein critical for its functions. Here we report three individuals from unrelated families that have bi-allellic TRAPPC11 variants. Subject 1 harbors a compound heterozygous variant (c.1287 + 5G > A and c.3379_3380insT). The former variant results in a partial deletion of the foie gras domain (p.Ala372_Ser429del), while the latter variant results in a frame-shift and extension at the carboxy terminus (p.Asp1127Valfs*47). Subjects 2 and 3 both harbour a homozygous missense variant (c.2938G > A; p.Gly980Arg). Fibroblasts from all three subjects displayed membrane trafficking defects manifested as delayed endoplasmic reticulum (ER)-to-Golgi transport and/or a delay in protein exit from the Golgi. All three individuals also show a defect in glycosylation of an ER-resident glycoprotein. However, only the compound heterozygous subject displayed an autophagic flux defect. Collectively, our characterization of these individuals with bi-allelic TRAPPC11 variants highlights the functional importance of the carboxy-terminal portion of the protein.
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Affiliation(s)
- Miroslav P Milev
- Concordia University, Department of Biology, Montreal, Quebec, Canada
| | - Daniela Stanga
- Concordia University, Department of Biology, Montreal, Quebec, Canada
| | - Anne Schänzer
- Institute of Neuropathology, Justus Liebig University Giessen, Giessen, Germany
| | - Andrés Nascimento
- Neuromuscular Unit, Neuropaediatrics Department, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, Barcelona, Spain.,U705 and U703 Center for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Djenann Saint-Dic
- Concordia University, Department of Biology, Montreal, Quebec, Canada
| | - Carlos Ortez
- Neuromuscular Unit, Neuropaediatrics Department, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Daniel Natera-de Benito
- Neuromuscular Unit, Neuropaediatrics Department, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Desiré González Barrios
- Servicio de Pediatría, Hospital Universitario Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
| | - Jaume Colomer
- Neuromuscular Unit, Neuropaediatrics Department, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Carmen Badosa
- Neuromuscular Unit, Neuropaediatrics Department, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Cristina Jou
- U705 and U703 Center for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.,Pathology Department and Biobank, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Pia Gallano
- U705 and U703 Center for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.,Servicio de Genética, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Lidia Gonzalez-Quereda
- U705 and U703 Center for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.,Servicio de Genética, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Ana Töpf
- The John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle-upon-Tyne, UK
| | - Katherine Johnson
- The John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle-upon-Tyne, UK.,Institute of Cellular Medicine, Newcastle University, Newcastle-upon-Tyne, UK
| | - Volker Straub
- The John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle-upon-Tyne, UK
| | - Andreas Hahn
- Department of Child Neurology, Justus Liebig University Giessen, Giessen, Germany.
| | - Michael Sacher
- Concordia University, Department of Biology, Montreal, Quebec, Canada. .,McGill University, Department of Anatomy and Cell Biology, Montreal, Quebec, Canada.
| | - Cecilia Jimenez-Mallebrera
- Neuromuscular Unit, Neuropaediatrics Department, Hospital Sant Joan de Déu, Institut de Recerca Sant Joan de Déu, Barcelona, Spain. .,U705 and U703 Center for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.
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14
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Rosquete MR, Worden N, Ren G, Sinclair RM, Pfleger S, Salemi M, Phinney BS, Domozych D, Wilkop T, Drakakaki G. AtTRAPPC11/ROG2: A Role for TRAPPs in Maintenance of the Plant Trans-Golgi Network/Early Endosome Organization and Function. THE PLANT CELL 2019; 31:1879-1898. [PMID: 31175171 PMCID: PMC6713296 DOI: 10.1105/tpc.19.00110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/06/2019] [Accepted: 06/02/2019] [Indexed: 05/14/2023]
Abstract
The dynamic trans-Golgi network/early endosome (TGN/EE) facilitates cargo sorting and trafficking and plays a vital role in plant development and environmental response. Transport protein particles (TRAPPs) are multi-protein complexes acting as guanine nucleotide exchange factors and possibly as tethers, regulating intracellular trafficking. TRAPPs are essential in all eukaryotic cells and are implicated in a number of human diseases. It has been proposed that they also play crucial roles in plants; however, our current knowledge about the structure and function of plant TRAPPs is very limited. Here, we identified and characterized AtTRAPPC11/RESPONSE TO OLIGOGALACTURONIDE2 (AtTRAPPC11/ROG2), a TGN/EE-associated, evolutionarily conserved TRAPP protein in Arabidopsis (Arabidopsis thaliana). AtTRAPPC11/ROG2 regulates TGN integrity, as evidenced by altered TGN/EE association of several residents, including SYNTAXIN OF PLANTS61, and altered vesicle morphology in attrappc11/rog2 mutants. Furthermore, endocytic traffic and brefeldin A body formation are perturbed in attrappc11/rog2, suggesting a role for AtTRAPPC11/ROG2 in regulation of endosomal function. Proteomic analysis showed that AtTRAPPC11/ROG2 defines a hitherto uncharacterized TRAPPIII complex in plants. In addition, attrappc11/rog2 mutants are hypersensitive to salinity, indicating an undescribed role of TRAPPs in stress responses. Overall, our study illustrates the plasticity of the endomembrane system through TRAPP protein functions and opens new avenues to explore this dynamic network.
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Affiliation(s)
| | - Natasha Worden
- Department of Plant Sciences University of California, Davis, California 95616
| | - Guangxi Ren
- Department of Plant Sciences University of California, Davis, California 95616
| | - Rosalie M Sinclair
- Department of Plant Sciences University of California, Davis, California 95616
| | - Sina Pfleger
- Department of Plant Sciences University of California, Davis, California 95616
| | - Michelle Salemi
- Genome Center, University of California, Davis, California 95616
| | - Brett S Phinney
- Genome Center, University of California, Davis, California 95616
| | - David Domozych
- Department of Biology and Skidmore Microscopy Imaging Center, Skidmore College, Saratoga Springs, New York 12866
| | - Thomas Wilkop
- Department of Plant Sciences University of California, Davis, California 95616
- Light Microscopy Core, University of Kentucky, Lexington, Kentucky 40536
| | - Georgia Drakakaki
- Department of Plant Sciences University of California, Davis, California 95616
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15
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Barrows NJ, Anglero-Rodriguez Y, Kim B, Jamison SF, Le Sommer C, McGee CE, Pearson JL, Dimopoulos G, Ascano M, Bradrick SS, Garcia-Blanco MA. Dual roles for the ER membrane protein complex in flavivirus infection: viral entry and protein biogenesis. Sci Rep 2019; 9:9711. [PMID: 31273220 PMCID: PMC6609633 DOI: 10.1038/s41598-019-45910-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Accepted: 05/27/2019] [Indexed: 12/16/2022] Open
Abstract
Hundreds of cellular host factors are required to support dengue virus infection, but their identity and roles are incompletely characterized. Here, we identify human host dependency factors required for efficient dengue virus-2 (DENV2) infection of human cells. We focused on two, TTC35 and TMEM111, which we previously demonstrated to be required for yellow fever virus (YFV) infection and others subsequently showed were also required by other flaviviruses. These proteins are components of the human endoplasmic reticulum membrane protein complex (EMC), which has roles in ER-associated protein biogenesis and lipid metabolism. We report that DENV, YFV and Zika virus (ZIKV) infections were strikingly inhibited, while West Nile virus infection was unchanged, in cells that lack EMC subunit 4. Furthermore, targeted depletion of EMC subunits in live mosquitoes significantly reduced DENV2 propagation in vivo. Using a novel uncoating assay, which measures interactions between host RNA-binding proteins and incoming viral RNA, we show that EMC is required at or prior to virus uncoating. Importantly, we uncovered a second and important role for the EMC. The complex is required for viral protein accumulation in a cell line harboring a ZIKV replicon, indicating that EMC participates in the complex process of viral protein biogenesis.
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Affiliation(s)
- Nicholas J Barrows
- Department of Microbiology and Molecular Genetics, and Center for RNA Biology, Duke University, Durham, USA.,Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, USA
| | - Yesseinia Anglero-Rodriguez
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Byungil Kim
- Department of Biochemistry, Vanderbilt University, Nashville, USA
| | - Sharon F Jamison
- Department of Microbiology and Molecular Genetics, and Center for RNA Biology, Duke University, Durham, USA
| | - Caroline Le Sommer
- Department of Microbiology and Molecular Genetics, and Center for RNA Biology, Duke University, Durham, USA
| | | | - James L Pearson
- Department of Microbiology and Molecular Genetics, and Center for RNA Biology, Duke University, Durham, USA
| | - George Dimopoulos
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Manuel Ascano
- Department of Biochemistry, Vanderbilt University, Nashville, USA
| | - Shelton S Bradrick
- Department of Microbiology and Molecular Genetics, and Center for RNA Biology, Duke University, Durham, USA. .,Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, USA.
| | - Mariano A Garcia-Blanco
- Department of Microbiology and Molecular Genetics, and Center for RNA Biology, Duke University, Durham, USA. .,Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, USA. .,Programme of Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore.
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16
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Stanga D, Zhao Q, Milev MP, Saint-Dic D, Jimenez-Mallebrera C, Sacher M. TRAPPC11 functions in autophagy by recruiting ATG2B-WIPI4/WDR45 to preautophagosomal membranes. Traffic 2019; 20:325-345. [PMID: 30843302 DOI: 10.1111/tra.12640] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 01/01/2023]
Abstract
TRAPPC11 has been implicated in membrane traffic and lipid-linked oligosaccharide synthesis, and mutations in TRAPPC11 result in neuromuscular and developmental phenotypes. Here, we show that TRAPPC11 has a role upstream of autophagosome formation during macroautophagy. Upon TRAPPC11 depletion, LC3-positive membranes accumulate prior to, and fail to be cleared during, starvation. A proximity biotinylation assay identified ATG2B and its binding partner WIPI4/WDR45 as TRAPPC11 interactors. TRAPPC11 depletion phenocopies that of ATG2 and WIPI4 and recruitment of both proteins to membranes is defective upon reduction of TRAPPC11. We find that a portion of TRAPPC11 and other TRAPP III proteins localize to isolation membranes. Fibroblasts from a patient with TRAPPC11 mutations failed to recruit ATG2B-WIPI4, suggesting that this interaction is physiologically relevant. Since ATG2B-WIPI4 is required for isolation membrane expansion, our study suggests that TRAPPC11 plays a role in this process. We propose a model whereby the TRAPP III complex participates in the formation and expansion of the isolation membrane at several steps.
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Affiliation(s)
- Daniela Stanga
- Concordia University, Department of Biology, Montreal, Quebec, Canada
| | - Qingchuan Zhao
- University of Montreal, Department of Medicine and Institute for Research in Immunology and Cancer, Montreal, Quebec, Canada
| | - Miroslav P Milev
- Concordia University, Department of Biology, Montreal, Quebec, Canada
| | - Djenann Saint-Dic
- Concordia University, Department of Biology, Montreal, Quebec, Canada
| | - Cecilia Jimenez-Mallebrera
- Neuromuscular Unit, Neuropaediatrics Department, Institut de Recerca Sant Joan de Déu, Hospital Sant Joan de Déu and CIBERER, Barcelona, Spain
| | - Michael Sacher
- Concordia University, Department of Biology, Montreal, Quebec, Canada.,McGill University, Department of Anatomy and Cell Biology, Quebec, Canada
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17
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Sacher M, Shahrzad N, Kamel H, Milev MP. TRAPPopathies: An emerging set of disorders linked to variations in the genes encoding transport protein particle (TRAPP)-associated proteins. Traffic 2018; 20:5-26. [PMID: 30152084 DOI: 10.1111/tra.12615] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 08/23/2018] [Accepted: 08/26/2018] [Indexed: 02/06/2023]
Abstract
The movement of proteins between cellular compartments requires the orchestrated actions of many factors including Rab family GTPases, Soluble NSF Attachment protein REceptors (SNAREs) and so-called tethering factors. One such tethering factor is called TRAnsport Protein Particle (TRAPP), and in humans, TRAPP proteins are distributed into two related complexes called TRAPP II and III. Although thought to act as a single unit within the complex, in the past few years it has become evident that some TRAPP proteins function independently of the complex. Consistent with this, variations in the genes encoding these proteins result in a spectrum of human diseases with diverse, but partially overlapping, phenotypes. This contrasts with other tethering factors such as COG, where variations in the genes that encode its subunits all result in an identical phenotype. In this review, we present an up-to-date summary of all the known disease-related variations of genes encoding TRAPP-associated proteins and the disorders linked to these variations which we now call TRAPPopathies.
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Affiliation(s)
- Michael Sacher
- Department of Biology, Concordia University, Montreal, Quebec, Canada.,Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
| | - Nassim Shahrzad
- Department of Medicine, University of California, San Francisco, California
| | - Hiba Kamel
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Miroslav P Milev
- Department of Biology, Concordia University, Montreal, Quebec, Canada
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18
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Zang L, Maddison LA, Chen W. Zebrafish as a Model for Obesity and Diabetes. Front Cell Dev Biol 2018; 6:91. [PMID: 30177968 PMCID: PMC6110173 DOI: 10.3389/fcell.2018.00091] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 07/25/2018] [Indexed: 12/13/2022] Open
Abstract
Obesity and diabetes now considered global epidemics. The prevalence rates of diabetes are increasing in parallel with the rates of obesity and the strong connection between these two diseases has been coined as “diabesity.” The health risks of overweight or obesity include Type 2 diabetes mellitus (T2DM), coronary heart disease and cancer of numerous organs. Both obesity and diabetes are complex diseases that involve the interaction of genetics and environmental factors. The underlying pathogenesis of obesity and diabetes are not well understood and further research is needed for pharmacological and surgical management. Consequently, the use of animal models of obesity and/or diabetes is important for both improving the understanding of these diseases and to identify and develop effective treatments. Zebrafish is an attractive model system for studying metabolic diseases because of the functional conservation in lipid metabolism, adipose biology, pancreas structure, and glucose homeostasis. It is also suited for identification of novel targets associated with the risk and treatment of obesity and diabetes in humans. In this review, we highlight studies using zebrafish to model metabolic diseases, and discuss the advantages and disadvantages of studying pathologies associated with obesity and diabetes in zebrafish.
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Affiliation(s)
- Liqing Zang
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, United States.,Graduate School of Regional Innovation Studies, Mie University, Tsu, Japan
| | - Lisette A Maddison
- Center for Reproductive Biology, Washington State University, Pullman, WA, United States
| | - Wenbiao Chen
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, United States
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19
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Novel TRAPPC11 Mutations in a Chinese Pedigree of Limb Girdle Muscular Dystrophy. Case Rep Genet 2018; 2018:8090797. [PMID: 30105108 PMCID: PMC6076900 DOI: 10.1155/2018/8090797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 05/22/2018] [Indexed: 12/30/2022] Open
Abstract
Limb girdle muscular dystrophies (LGMDs) are a heterogeneous group of genetic myopathies leading primarily to proximal muscle weakness. It is caused by mutations at over 50 known genetic loci typically from mutations in genes encoding constituents of the sarcolemmal dystrophin complex or related functions. Herein we describe the case of two siblings with LGMD that were investigated using whole-exome sequencing followed by Sanger sequencing validation of a specific double-mutation in the TRAPPC11 gene. Further, from parental sequencing we determined the mode of transmission, a double heterozygous mutation at the maternal and paternal alleles. The two mutations detected have not been described in other patients.
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20
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Larson AA, Baker PR, Milev MP, Press CA, Sokol RJ, Cox MO, Lekostaj JK, Stence AA, Bossler AD, Mueller JM, Prematilake K, Tadjo TF, Williams CA, Sacher M, Moore SA. TRAPPC11 and GOSR2 mutations associate with hypoglycosylation of α-dystroglycan and muscular dystrophy. Skelet Muscle 2018; 8:17. [PMID: 29855340 PMCID: PMC5984345 DOI: 10.1186/s13395-018-0163-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 05/16/2018] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Transport protein particle (TRAPP) is a supramolecular protein complex that functions in localizing proteins to the Golgi compartment. The TRAPPC11 subunit has been implicated in muscle disease by virtue of homozygous and compound heterozygous deleterious mutations being identified in individuals with limb girdle muscular dystrophy and congenital muscular dystrophy. It remains unclear how this protein leads to muscle disease. Furthermore, a role for this protein, or any other membrane trafficking protein, in the etiology of the dystroglycanopathy group of muscular dystrophies has yet to be found. Here, using a multidisciplinary approach including genetics, immunofluorescence, western blotting, and live cell analysis, we implicate both TRAPPC11 and another membrane trafficking protein, GOSR2, in α-dystroglycan hypoglycosylation. CASE PRESENTATION Subject 1 presented with severe epileptic episodes and subsequent developmental deterioration. Upon clinical evaluation she was found to have brain, eye, and liver abnormalities. Her serum aminotransferases and creatine kinase were abnormally high. Subjects 2 and 3 are siblings from a family unrelated to subject 1. Both siblings displayed hypotonia, muscle weakness, low muscle bulk, and elevated creatine kinase levels. Subject 3 also developed a seizure disorder. Muscle biopsies from subjects 1 and 3 were severely dystrophic with abnormal immunofluorescence and western blotting indicative of α-dystroglycan hypoglycosylation. Compound heterozygous mutations in TRAPPC11 were identified in subject 1: c.851A>C and c.965+5G>T. Cellular biological analyses on fibroblasts confirmed abnormal membrane trafficking. Subject 3 was found to have compound heterozygous mutations in GOSR2: c.430G>T and c.2T>G. Cellular biological analyses on fibroblasts from subject 3 using two different model cargo proteins did not reveal defects in protein transport. No mutations were found in any of the genes currently known to cause dystroglycanopathy in either individual. CONCLUSION Recessive mutations in TRAPPC11 and GOSR2 are associated with congenital muscular dystrophy and hypoglycosylation of α-dystroglycan. This is the first report linking membrane trafficking proteins to dystroglycanopathy and suggests that these genes should be considered in the diagnostic evaluation of patients with congenital muscular dystrophy and dystroglycanopathy.
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Affiliation(s)
- Austin A. Larson
- Department of Pediatrics, University of Colorado School of Medicine and Children’s Hospital Colorado, Aurora, CO USA
| | - Peter R. Baker
- Department of Pediatrics, University of Colorado School of Medicine and Children’s Hospital Colorado, Aurora, CO USA
| | | | - Craig A. Press
- Department of Pediatrics, University of Colorado School of Medicine and Children’s Hospital Colorado, Aurora, CO USA
| | - Ronald J. Sokol
- Department of Pediatrics, University of Colorado School of Medicine and Children’s Hospital Colorado, Aurora, CO USA
| | - Mary O. Cox
- Department of Pathology Carver College of Medicine, The University of Iowa, Iowa City, IA USA
| | - Jacqueline K. Lekostaj
- Department of Pathology Carver College of Medicine, The University of Iowa, Iowa City, IA USA
| | - Aaron A. Stence
- Department of Pathology Carver College of Medicine, The University of Iowa, Iowa City, IA USA
| | - Aaron D. Bossler
- Department of Pathology Carver College of Medicine, The University of Iowa, Iowa City, IA USA
| | - Jennifer M. Mueller
- Division of Genetics and Metabolism, University of Florida College of Medicine, Gainesville, FL USA
| | | | | | - Charles A. Williams
- Division of Genetics and Metabolism, University of Florida College of Medicine, Gainesville, FL USA
| | - Michael Sacher
- Department of Biology, Concordia University, Montreal, Canada
- Department of Anatomy and Cell Biology, McGill University, Montreal, Canada
| | - Steven A. Moore
- Department of Pathology Carver College of Medicine, The University of Iowa, Iowa City, IA USA
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21
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Liu L, Zuo X, Zhu Z, Wen L, Yang C, Zhu C, Tang L, Cheng Y, Chen M, Zhou F, Zheng X, Wang W, Yin X, Tang H, Sun L, Yang S, Sheng Y, Cui Y, Zhang X. Genome-wide association study identifies three novel susceptibility loci for systemic lupus erythematosus in Han Chinese. Br J Dermatol 2018; 179:506-508. [PMID: 29494758 DOI: 10.1111/bjd.16500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- L Liu
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China.,Institute of Dermatology and Department of Dermatology, Huashan Hospital of Fudan University, Shanghai, 200040, China
| | - X Zuo
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - Z Zhu
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - L Wen
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - C Yang
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - C Zhu
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - L Tang
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - Y Cheng
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - M Chen
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - F Zhou
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - X Zheng
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - W Wang
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - X Yin
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China.,Center for Statistical Genetics, Department of Biostatistics, University of Michigan, Ann Arbor, Michigan, 48109, U.S.A
| | - H Tang
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - L Sun
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - S Yang
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - Y Sheng
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China
| | - Y Cui
- Department of Dermatology, China-Japan Friendship Hospital, East Street Cherry Park, Chaoyang District, Beijing, 100029, China
| | - X Zhang
- Institute of Dermatology and Department of Dermatology, the First Affiliated Hospital, 81 Meishan Road, Hefei, Anhui, 230032, China.,Key Laboratory of Dermatology, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, 230032, China.,Institute of Dermatology and Department of Dermatology, Huashan Hospital of Fudan University, Shanghai, 200040, China
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22
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Abstract
Spatial analysis of functional enrichment (SAFE) is a systematic quantitative approach for annotating large biological networks. SAFE detects network regions that are statistically overrepresented for functional groups or quantitative phenotypes of interest, and provides an intuitive visual representation of their relative positioning within the network. In doing so, SAFE determines which functions cocluster in a network, which parts of the network they are associated with and how they are potentially related to one another.Here, I provide a detailed stepwise description of how to perform a SAFE analysis. As an example, I use SAFE to annotate the genome-scale genetic interaction similarity network from Saccharomyces cerevisiae with Gene Ontology (GO) biological process terms. In addition, I show how integrating GO with chemical genomic data in SAFE can recapitulate known modes of action of chemical compounds and potentially identify novel drug mechanisms.
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23
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Kamel M, Ninov N. Catching new targets in metabolic disease with a zebrafish. Curr Opin Pharmacol 2017; 37:41-50. [DOI: 10.1016/j.coph.2017.08.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/04/2017] [Accepted: 08/11/2017] [Indexed: 12/12/2022]
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24
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Fee DB, Harmelink M, Monrad P, Pyzik E. Siblings With Mutations in TRAPPC11 Presenting With Limb-Girdle Muscular Dystrophy 2S. J Clin Neuromuscul Dis 2017; 19:27-30. [PMID: 28827486 DOI: 10.1097/cnd.0000000000000173] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Limb-girdle muscular dystrophy 2S (LGMD2S) is an autosomal recessive condition due to mutations in the TRAPPC11 gene. It is recently described with only 9 prior reported individuals. In addition to the muscular dystrophy, some affected individuals have small head size, global developmental delay, seizures, cataracts, and liver problems. Siblings with an uncharacterized LGMD were assessed; whole-exome screening revealed compound heterozygous mutations in the TRAPPC11 gene. Their presentation helps confirm the emerging phenotype for LGMD2S.
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Affiliation(s)
- Dominic B Fee
- Department of Neurology, Medical College of Wisconsin, Milwaukee, WI
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25
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Pham DH, Zhang C, Yin C. Using zebrafish to model liver diseases-Where do we stand? CURRENT PATHOBIOLOGY REPORTS 2017; 5:207-221. [PMID: 29098121 DOI: 10.1007/s40139-017-0141-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Purpose of Review The liver is the largest internal organ and performs both exocrine and endocrine function that is necessary for survival. Liver failure is among the leading causes of death and represents a major global health burden. Liver transplantation is the only effective treatment for end-stage liver diseases. Animal models advance our understanding of liver disease etiology and hold promise for the development of alternative therapies. Zebrafish has become an increasingly popular system for modeling liver diseases and complements the rodent models. Recent Findings The zebrafish liver contains main cell types that are found in mammalian liver and exhibits similar pathogenic responses to environmental insults and genetic mutations. Zebrafish have been used to model neonatal cholestasis, cholangiopathies, such as polycystic liver disease, alcoholic liver disease, and non-alcoholic fatty liver disease. It also provides a unique opportunity to study the plasticity of liver parenchymal cells during regeneration. Summary In this review, we summarize the recent work of building zebrafish models of liver diseases. We highlight how these studies have brought new knowledge of disease mechanisms. We also discuss the advantages and challenges of using zebrafish to model liver diseases.
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Affiliation(s)
- Duc-Hung Pham
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229, USA
| | - Changwen Zhang
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229, USA
| | - Chunyue Yin
- Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229, USA.,Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, 45229, USA
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26
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O’Hare EA, Yang R, Yerges-Armstrong L, Sreenivasan U, McFarland R, Leitch CC, Wilson MH, Narina S, Gorden A, Ryan K, Shuldiner AR, Farber SA, Wood GC, Still CD, Gerhard GS, Robishaw JD, Sztalryd C, Zaghloul NA. TM6SF2 rs58542926 impacts lipid processing in liver and small intestine. Hepatology 2017; 65:1526-1542. [PMID: 28027591 PMCID: PMC5397347 DOI: 10.1002/hep.29021] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 12/22/2016] [Accepted: 12/22/2016] [Indexed: 12/21/2022]
Abstract
The transmembrane 6 superfamily member 2 (TM6SF2) loss-of-function variant rs58542926 is a genetic risk factor for nonalcoholic fatty liver disease and progression to fibrosis but is paradoxically associated with lower levels of hepatically derived triglyceride-rich lipoproteins. TM6SF2 is expressed predominantly in liver and small intestine, sites for triglyceride-rich lipoprotein biogenesis and export. In light of this, we hypothesized that TM6SF2 may exhibit analogous effects on both liver and intestine lipid homeostasis. To test this, we genotyped rs58542926 in 983 bariatric surgery patients from the Geisinger Medical Center for Nutrition and Weight Management, Geisinger Health System, in Pennsylvania and from 3,556 study participants enrolled in the Amish Complex Disease Research Program. Although these two cohorts have different metabolic profiles, carriers in both cohorts had improved fasting lipid profiles. Importantly, following a high-fat challenge, carriers in the Amish Complex Disease Research Program cohort exhibited significantly lower postprandial serum triglycerides, suggestive of a role for TM6SF2 in the small intestine. To gain further insight into this putative role, effects of TM6SF2 deficiency were studied in a zebrafish model and in cultured human Caco-2 enterocytes. In both systems TM6SF2 deficiency resulted in defects in small intestine metabolism in response to dietary lipids, including significantly increased lipid accumulation, decreased lipid clearance, and increased endoplasmic reticulum stress. CONCLUSIONS These data strongly support a role of TM6SF2 in the regulation of postprandial lipemia, potentially through a similar function for TM6SF2 in the lipidation and/or export of both hepatically and intestinally derived triglyceride-rich lipoproteins. (Hepatology 2017;65:1526-1542).
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Affiliation(s)
- Elizabeth A. O’Hare
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Rongze Yang
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Laura Yerges-Armstrong
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Urmilla Sreenivasan
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Rebecca McFarland
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Carmen C. Leitch
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Meredith H. Wilson
- Carnegie Institution for Science, Department of Embryology, Baltimore, MD 21218, USA
| | - Shilpa Narina
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Alexis Gorden
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Kathy Ryan
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Alan R. Shuldiner
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Steve A. Farber
- Carnegie Institution for Science, Department of Embryology, Baltimore, MD 21218, USA
| | - G. Craig Wood
- Geisinger Clinic, Geisinger Obesity Research Institute, Danville PA 17822, USA
| | | | - Glenn S. Gerhard
- Geisinger Clinic, Geisinger Obesity Research Institute, Danville PA 17822, USA
| | - Janet D. Robishaw
- Geisinger Clinic, Geisinger Obesity Research Institute, Danville PA 17822, USA
| | - Carole Sztalryd
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Baltimore VA Medical Center, VA Research Service, Geriatric Research, Education and Clinical Center (GRECC) and VA Maryland Health Care System, 10N Green Street Baltimore 21201, USA
| | - Norann A. Zaghloul
- Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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27
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Abstract
The zebrafish skeleton shares many similarities with human and other vertebrate skeletons. Over the past years, work in zebrafish has provided an extensive understanding of the basic developmental mechanisms and cellular pathways directing skeletal development and homeostasis. This review will focus on the cell biology of cartilage and bone and how the basic cellular processes within chondrocytes and osteocytes function to assemble the structural frame of a vertebrate body. We will discuss fundamental functions of skeletal cells in production and secretion of extracellular matrix and cellular activities leading to differentiation of progenitors to mature cells that make up the skeleton. We highlight important examples where findings in zebrafish provided direction for the search for genes causing human skeletal defects and also how zebrafish research has proven important for validating candidate human disease genes. The work we cover here illustrates utility of zebrafish in unraveling molecular mechanisms of cellular functions necessary to form and maintain a healthy skeleton.
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Affiliation(s)
- Lauryn N Luderman
- Vanderbilt University Medical Center, Nashville, TN, United States; Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, United States; Vanderbilt Genetics Institute, Vanderbilt University, Nashville, TN, United States
| | - Gokhan Unlu
- Vanderbilt University Medical Center, Nashville, TN, United States; Vanderbilt Genetics Institute, Vanderbilt University, Nashville, TN, United States; Vanderbilt University, Nashville, TN, United States
| | - Ela W Knapik
- Vanderbilt University Medical Center, Nashville, TN, United States; Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN, United States; Vanderbilt Genetics Institute, Vanderbilt University, Nashville, TN, United States; Vanderbilt University, Nashville, TN, United States.
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28
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Matalonga L, Bravo M, Serra-Peinado C, García-Pelegrí E, Ugarteburu O, Vidal S, Llambrich M, Quintana E, Fuster-Jorge P, Gonzalez-Bravo MN, Beltran S, Dopazo J, Garcia-Garcia F, Foulquier F, Matthijs G, Mills P, Ribes A, Egea G, Briones P, Tort F, Girós M. Mutations inTRAPPC11are associated with a congenital disorder of glycosylation. Hum Mutat 2016; 38:148-151. [DOI: 10.1002/humu.23145] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 11/01/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Leslie Matalonga
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Miren Bravo
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Carla Serra-Peinado
- Department Biomedicina; Universitat de Barcelona and Institut d'Investigacions Mèdiques August Pi i Sunyer (IDIBAPS); Barcelona Spain
| | - Elisabeth García-Pelegrí
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Olatz Ugarteburu
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Silvia Vidal
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Maria Llambrich
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Ester Quintana
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Pedro Fuster-Jorge
- Neonatologia Hospital Universitario de Canarias; La Laguna, Sta Cruz de Tenerife Canarias Spain
| | | | - Sergi Beltran
- CNAG-CRG; Centre for Genomic Regulation (CRG); Barcelona Institute of Science and Technology (BIST); Baldiri i Reixac 4 Barcelona Spain
- Universitat Pompeu Fabra (UPF); Barcelona Spain
| | - Joaquin Dopazo
- Centro de Investigación Príncipe Felipe (CIPF, CIBERER); c/Eduardo Primo Yufera 3 Valencia
| | | | - François Foulquier
- Université de Lille; CNRS, UMR 8576 - UGSF - Unité de Glycobiologie Structurale et Fonctionnelle; F- Lille France
| | - Gert Matthijs
- Centre for Human Genetics; KU Leuven; Leuven Belgium
| | - Philippa Mills
- Genetics and Genomic Medicine; UCL Great Ormond Street Institute of Child Health; 30 Guilford Street London United Kingdom
| | - Antonia Ribes
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Gustavo Egea
- Department Biomedicina; Universitat de Barcelona and Institut d'Investigacions Mèdiques August Pi i Sunyer (IDIBAPS); Barcelona Spain
| | - Paz Briones
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Frederic Tort
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
| | - Marisa Girós
- Secció d'Errors Congènits del Metabolisme -IBC; Servei de Bioquímica i Genètica Molecular; Hospital Clínic, IDIBAPS, CIBERER; Barcelona Spain
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29
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Koehler K, Milev MP, Prematilake K, Reschke F, Kutzner S, Jühlen R, Landgraf D, Utine E, Hazan F, Diniz G, Schuelke M, Huebner A, Sacher M. A novel TRAPPC11 mutation in two Turkish families associated with cerebral atrophy, global retardation, scoliosis, achalasia and alacrima. J Med Genet 2016; 54:176-185. [PMID: 27707803 DOI: 10.1136/jmedgenet-2016-104108] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 09/02/2016] [Accepted: 09/10/2016] [Indexed: 11/04/2022]
Abstract
BACKGROUND Triple A syndrome (MIM #231550) is associated with mutations in the AAAS gene. However, about 30% of patients with triple A syndrome symptoms but an unresolved diagnosis do not harbour mutations in AAAS. OBJECTIVE Search for novel genetic defects in families with a triple A-like phenotype in whom AAAS mutations are not detected. METHODS Genome-wide linkage analysis, whole-exome sequencing and functional analyses were used to discover and verify a novel genetic defect in two families with achalasia, alacrima, myopathy and further symptoms. Effect and pathogenicity of the mutation were verified by cell biological studies. RESULTS We identified a homozygous splice mutation in TRAPPC11 (c.1893+3A>G, [NM_021942.5], g.4:184,607,904A>G [hg19]) in four patients from two unrelated families leading to incomplete exon skipping and reduction in full-length mRNA levels. TRAPPC11 encodes for trafficking protein particle complex subunit 11 (TRAPPC11), a protein of the transport protein particle (TRAPP) complex. Western blot analysis revealed a dramatic decrease in full-length TRAPPC11 protein levels and hypoglycosylation of LAMP1. Trafficking experiments in patient fibroblasts revealed a delayed arrival of marker proteins in the Golgi and a delay in their release from the Golgi to the plasma membrane. Mutations in TRAPPC11 have previously been described to cause limb-girdle muscular dystrophy type 2S (MIM #615356). Indeed, muscle histology of our patients also revealed mild dystrophic changes. Immunohistochemically, β-sarcoglycan was absent from focal patches. CONCLUSIONS The identified novel TRAPPC11 mutation represents an expansion of the myopathy phenotype described before and is characterised particularly by achalasia, alacrima, neurological and muscular phenotypes.
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Affiliation(s)
- Katrin Koehler
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Miroslav P Milev
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | | | - Felix Reschke
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Susann Kutzner
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Ramona Jühlen
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Dana Landgraf
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Eda Utine
- Pediatric Genetics Department, Ihsan Dogramaci Children's Hospital, Hacettepe University, Ankara, Turkey
| | - Filiz Hazan
- Department of Medical Genetics, Dr. Behçet Uz Children's Hospital, Izmir, Turkey
| | - Gulden Diniz
- Neuromuscular Diseases Centre, Tepecik Research Hospital, Izmir, Turkey
| | - Markus Schuelke
- Department of Neuropediatrics and NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Angela Huebner
- Klinik und Poliklinik für Kinder- und Jugendmedizin, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Michael Sacher
- Department of Biology, Concordia University, Montreal, Quebec, Canada.,Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
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