1
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Cook SR, Schwarz C, Guevar J, Assenmacher CA, Sheehy M, Fanzone N, Church ME, Murgiano L, Casal ML, Jagannathan V, Gutierrez-Quintana R, Lowrie M, Steffen F, Leeb T, Ekenstedt KJ. Canine RNF170 Single Base Deletion in a Naturally Occurring Model for Human Neuroaxonal Dystrophy. Mov Disord 2024. [PMID: 39177409 DOI: 10.1002/mds.29977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 07/15/2024] [Accepted: 07/29/2024] [Indexed: 08/24/2024] Open
Abstract
BACKGROUND Neuroaxonal dystrophy (NAD) is a group of inherited neurodegenerative disorders characterized primarily by the presence of spheroids (swollen axons) throughout the central nervous system. In humans, NAD is heterogeneous, both clinically and genetically. NAD has also been described to naturally occur in large animal models, such as dogs. A newly recognized disorder in Miniature American Shepherd dogs (MAS), consisting of a slowly progressive neurodegenerative syndrome, was diagnosed as NAD via histopathology. OBJECTIVES To describe the clinical and pathological phenotype together with the identification of the underlying genetic cause. METHODS Clinical and postmortem evaluations, together with a genome-wide association study and autozygosity mapping approach, followed by whole-genome sequencing. RESULTS Affected dogs were typically young adults and displayed an abnormal gait characterized by pelvic limb weakness and ataxia. The underlying genetic cause was identified as a 1-bp (base pair) deletion in RNF170 encoding ring finger protein 170, which perfectly segregates in an autosomal recessive pattern. This deletion is predicted to create a frameshift (XM_038559916.1:c.367delG) and early truncation of the RNF170 protein (XP_038415844.1:(p.Ala123Glnfs*11)). The age of this canine RNF170 variant was estimated at ~30 years, before the reproductive isolation of the MAS breed. CONCLUSIONS RNF170 variants were previously identified in human patients with autosomal recessive spastic paraplegia-85 (SPG85); this clinical phenotype shows similarities to the dogs described herein. We therefore propose that this novel MAS NAD could serve as an excellent large animal model for equivalent human diseases, particularly since affected dogs demonstrate a relatively long lifespan, which represents an opportunity for therapeutic trials. © 2024 The Author(s). Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Shawna R Cook
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
| | - Cleo Schwarz
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Julien Guevar
- AniCura Thun, Neurology Department, Burgerstrasse, Switzerland
| | - Charles-Antoine Assenmacher
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Maeve Sheehy
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
| | - Nathan Fanzone
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Molly E Church
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Leonardo Murgiano
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Margret L Casal
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Rodrigo Gutierrez-Quintana
- Small Animal Hospital, School of Biodiversity, One Health, and Veterinary Medicine, University of Glasgow, Glasgow, UK
| | - Mark Lowrie
- Movement Referrals: Independent Veterinary Specialists, Preston Brook, UK
| | - Frank Steffen
- Neurology Service, Department of Small Animals, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Kari J Ekenstedt
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
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2
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Tanaka M, Fujikawa R, Sekiguchi T, Hernandez J, Johnson OT, Tanaka D, Kumafuji K, Serikawa T, Hoang Trung H, Hattori K, Mashimo T, Kuwamura M, Gestwicki JE, Kuramoto T. A missense mutation in the Hspa8 gene encoding heat shock cognate protein 70 causes neuroaxonal dystrophy in rats. Front Neurosci 2024; 18:1263724. [PMID: 38384479 PMCID: PMC10880117 DOI: 10.3389/fnins.2024.1263724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 01/16/2024] [Indexed: 02/23/2024] Open
Abstract
Neuroaxonal dystrophy (NAD) is a neurodegenerative disease characterized by spheroid (swollen axon) formation in the nervous system. In the present study, we focused on a newly established autosomal recessive mutant strain of F344-kk/kk rats with hind limb gait abnormalities and ataxia from a young age. Histopathologically, a number of axonal spheroids were observed throughout the central nervous system, including the spinal cord (mainly in the dorsal cord), brain stem, and cerebellum in F344-kk/kk rats. Transmission electron microscopic observation of the spinal cord revealed accumulation of electron-dense bodies, degenerated abnormal mitochondria, as well as membranous or tubular structures in the axonal spheroids. Based on these neuropathological findings, F344-kk/kk rats were diagnosed with NAD. By a positional cloning approach, we identified a missense mutation (V95E) in the Hspa8 (heat shock protein family A (Hsp70) member 8) gene located on chromosome 8 of the F344-kk/kk rat genome. Furthermore, we developed the Hspa8 knock-in (KI) rats with the V95E mutation using the CRISPR-Cas system. Homozygous Hspa8-KI rats exhibited ataxia and axonal spheroids similar to those of F344-kk/kk rats. The V95E mutant HSC70 protein exhibited the significant but modest decrease in the maximum hydrolysis rate of ATPase when stimulated by co-chaperons DnaJB4 and BAG1 in vitro, which suggests the functional deficit in the V95E HSC70. Together, our findings provide the first evidence that the genetic alteration of the Hspa8 gene caused NAD in mammals.
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Affiliation(s)
- Miyuu Tanaka
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Ryoko Fujikawa
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Takahiro Sekiguchi
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Jason Hernandez
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, CA, United States
| | - Oleta T. Johnson
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, CA, United States
| | - Daisuke Tanaka
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Kenta Kumafuji
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Tadao Serikawa
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Hieu Hoang Trung
- Department of Animal Science, Faculty of Agriculture, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Kosuke Hattori
- Division of Animal Genetics, The Institute of Medical Science, The University of Tokyo, Minato-ku, Tokyo, Japan
| | - Tomoji Mashimo
- Division of Animal Genetics, The Institute of Medical Science, The University of Tokyo, Minato-ku, Tokyo, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Jason E. Gestwicki
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, CA, United States
| | - Takashi Kuramoto
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
- Department of Animal Science, Faculty of Agriculture, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
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3
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Cocostîrc V, Paștiu AI, Pusta DL. An Overview of Canine Inherited Neurological Disorders with Known Causal Variants. Animals (Basel) 2023; 13:3568. [PMID: 38003185 PMCID: PMC10668755 DOI: 10.3390/ani13223568] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/15/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
Hereditary neurological conditions documented in dogs encompass congenital, neonatal, and late-onset disorders, along with both progressive and non-progressive forms. In order to identify the causal variant of a disease, the main two approaches are genome-wide investigations and candidate gene investigation. Online Mendelian Inheritance in Animals currently lists 418 Mendelian disorders specific to dogs, of which 355 have their likely causal genetic variant identified. This review aims to summarize the current knowledge on the canine nervous system phenes and their genetic causal variant. It has been noted that the majority of these diseases have an autosomal recessive pattern of inheritance. Additionally, the dog breeds that are more prone to develop such diseases are the Golden Retriever, in which six inherited neurological disorders with a known causal variant have been documented, and the Belgian Shepherd, in which five such disorders have been documented. DNA tests can play a vital role in effectively managing and ultimately eradicating inherited diseases.
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Affiliation(s)
- Vlad Cocostîrc
- Department of Genetics and Hereditary Diseases, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 400372 Cluj-Napoca, Romania; (A.I.P.); (D.L.P.)
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4
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Stee K, Van Poucke M, Lowrie M, Van Ham L, Peelman L, Olby N, Bhatti SF. Phenotypic and genetic aspects of hereditary ataxia in dogs. J Vet Intern Med 2023; 37:1306-1322. [PMID: 37341581 PMCID: PMC10365067 DOI: 10.1111/jvim.16742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 05/07/2023] [Indexed: 06/22/2023] Open
Abstract
Hereditary ataxias are a large group of neurodegenerative diseases that have cerebellar or spinocerebellar dysfunction as core feature, occurring as an isolated sign or as part of a syndrome. Based on neuropathology, this group of diseases has so far been classified into cerebellar cortical degenerations, spinocerebellar degenerations, cerebellar ataxias without substantial neurodegeneration, canine multiple system degeneration, and episodic ataxia. Several new hereditary ataxia syndromes are described, but most of these diseases have similar clinical signs and unspecific diagnostic findings, wherefore achieving a definitive diagnosis in these dogs is challenging. Eighteen new genetic variants associated with these diseases have been discovered in the last decade, allowing clinicians to reach a definitive diagnosis for most of these conditions, and allowing breeding schemes to adapt to prevent breeding of affected puppies. This review summarizes the current knowledge about hereditary ataxias in dogs, and proposes to add a "multifocal degenerations with predominant (spino)cerebellar component" category regrouping canine multiple system degeneration, new hereditary ataxia syndromes that do not fit in 1 of the previous categories, as well as specific neuroaxonal dystrophies and lysosomal storage diseases that cause major (spino)cerebellar dysfunction.
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Affiliation(s)
- Kimberley Stee
- Small Animal DepartmentFaculty of Veterinary Medicine, Ghent UniversityMerelbekeBelgium
| | - Mario Van Poucke
- Department of Veterinary and BiosciencesFaculty of Veterinary Sciences, Ghent UniversityMerelbekeBelgium
| | | | - Luc Van Ham
- Small Animal DepartmentFaculty of Veterinary Medicine, Ghent UniversityMerelbekeBelgium
| | - Luc Peelman
- Department of Veterinary and BiosciencesFaculty of Veterinary Sciences, Ghent UniversityMerelbekeBelgium
| | - Natasha Olby
- Department of Clinical SciencesNorth Carolina State UniversityRaleighNorth CarolinaUSA
| | - Sofie F.M. Bhatti
- Small Animal DepartmentFaculty of Veterinary Medicine, Ghent UniversityMerelbekeBelgium
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5
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Moura E, Tasqueti UI, Mangrich-Rocha RMV, Filho JRE, de Farias MR, Pimpão CT. Inborn Errors of Metabolism in Dogs: Historical, Metabolic, Genetic, and Clinical Aspects. Top Companion Anim Med 2022; 51:100731. [DOI: 10.1016/j.tcam.2022.100731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 09/11/2022] [Accepted: 10/14/2022] [Indexed: 11/06/2022]
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6
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Skoff RP, Bessert D, Banerjee S, Luo X, Thummel R. Characterization of the Expression of Vacuolar Protein Sorting 11 (Vps11) in Mammalian Oligodendrocytes. ASN Neuro 2021; 13:17590914211009851. [PMID: 33874780 PMCID: PMC8060772 DOI: 10.1177/17590914211009851] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
A founder mutation in human VPS11 (Vacuolar
Protein Sorting 11) was recently linked to a genetic
leukoencephalopathy in Ashkenazi Jews that presents with the classical
features of white matter disorders of the central nervous system
(CNS). The neurological deficits include hypomyelination, hypotonia,
gradual loss of vision, and seizures. However, the cells expressing
the mutation were not identified. Here we describe, using
immunocytochemistry, the strong expression of Vps11 in mouse
oligodendrocytes and, specifically, its localization with Myelin
Associated Glycoprotein (MAG) in the inner tongue of myelin. In
longitudinal sections of myelin, it forms a bead-like structure,
alternating with Myelin Basic Protein (MBP). Immunofluorescent
staining with Vps11 and neurofilament proteins indicates the absence
of Vps11 in axons in vivo. Finally, changes in Vps11
expression are associated with altered proteolipid protein (PLP)
levels based upon mice with duplications or deletions of the
Plp1 gene. To determine potential functional
contributions of Vps11, we combined Vps11 with Platelet Derived Growth
Factor Receptor-α (PDGFRα) in vitro and in
vivo: in both conditions, co-localization of the two
proteins was frequently found in round vesicles of
OPCs/oligodendrocytes, suggesting retrograde transport for degradation
by the endolysosomal system. Neuron-to-glial communication has been
invoked to explain degenerative changes in myelin followed by
degenerative changes in axons, and vice versa; but to our knowledge,
no specific proteins in retrograde transport from the myelin inner
tongue to oligodendrocyte perikarya have been identified. The
identification of mutations in VPS11 and its
localization at the axon-myelin interface should open new avenues of
research.
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Affiliation(s)
- Robert P Skoff
- Department of Ophthalmology, Visual and Anatomical Sciences, 12267Wayne State University School of Medicine, Detroit, Michigan, United States
| | - Denise Bessert
- Department of Ophthalmology, Visual and Anatomical Sciences, 12267Wayne State University School of Medicine, Detroit, Michigan, United States
| | - Shreya Banerjee
- Department of Ophthalmology, Visual and Anatomical Sciences, 12267Wayne State University School of Medicine, Detroit, Michigan, United States
| | - Xixia Luo
- Department of Ophthalmology, Visual and Anatomical Sciences, 12267Wayne State University School of Medicine, Detroit, Michigan, United States
| | - Ryan Thummel
- Department of Ophthalmology, Visual and Anatomical Sciences, 12267Wayne State University School of Medicine, Detroit, Michigan, United States
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7
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Compound heterozygous PLA2G6 loss-of-function variants in Swaledale sheep with neuroaxonal dystrophy. Mol Genet Genomics 2020; 296:235-242. [PMID: 33159255 PMCID: PMC7840627 DOI: 10.1007/s00438-020-01742-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 10/23/2020] [Indexed: 10/28/2022]
Abstract
Sporadic occurrences of neurodegenerative disorders including neuroaxonal dystrophy (NAD) have been previously reported in sheep. However, so far no causative genetic variant has been found for ovine NAD. The aim of this study was to characterize the phenotype and the genetic aetiology of an early-onset neurodegenerative disorder observed in several lambs of purebred Swaledale sheep, a native English breed. Affected lambs showed progressive ataxia and stiff gait and subsequent histopathological analysis revealed the widespread presence of axonal spheroid indicating neuronal degeneration. Thus, the observed clinical phenotype could be explained by a novel form of NAD. After SNP genotyping and subsequent linkage mapping within a paternal half-sib pedigree with a total of five NAD-affected lambs, we identified two loss-of-function variants by whole-genome sequencing in the ovine PLA2G6 gene situated in a NAD-linked genome region on chromosome 3. All cases were carriers of a compound heterozygous splice site variant in intron 2 and a nonsense variant in exon 8. Herein we present evidence for the occurrence of a familial novel form of recessively inherited NAD in sheep due to allelic heterogeneity at PLA2G6. This study reports two pathogenic variants in PLA2G6 causing a novel form of NAD in Swaledale sheep which enables selection against this fatal disorder.
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8
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Vernau KM, Struys E, Letko A, Woolard KD, Aguilar M, Brown EA, Cissell DD, Dickinson PJ, Shelton GD, Broome MR, Gibson KM, Pearl PL, König F, Van Winkle TJ, O’Brien D, Roos B, Matiasek K, Jagannathan V, Drögemüller C, Mansour TA, Brown CT, Bannasch DL. A Missense Variant in ALDH5A1 Associated with Canine Succinic Semialdehyde Dehydrogenase Deficiency (SSADHD) in the Saluki Dog. Genes (Basel) 2020; 11:genes11091033. [PMID: 32887425 PMCID: PMC7565783 DOI: 10.3390/genes11091033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 02/07/2023] Open
Abstract
Dogs provide highly valuable models of human disease due to the similarity in phenotype presentation and the ease of genetic analysis. Seven Saluki puppies were investigated for neurological abnormalities including seizures and altered behavior. Magnetic resonance imaging showed a diffuse, marked reduction in cerebral cortical thickness, and symmetrical T2 hyperintensity in specific brain regions. Cerebral cortical atrophy with vacuolation (status spongiosus) was noted on necropsy. Genome-wide association study of 7 affected and 28 normal Salukis revealed a genome-wide significantly associated region on CFA 35. Whole-genome sequencing of three confirmed cases from three different litters revealed a homozygous missense variant within the aldehyde dehydrogenase 5 family member A1 (ALDH5A1) gene (XM_014110599.2: c.866G>A; XP_013966074.2: p.(Gly288Asp). ALDH5A1 encodes a succinic semialdehyde dehydrogenase (SSADH) enzyme critical in the gamma-aminobutyric acid neurotransmitter (GABA) metabolic pathway. Metabolic screening of affected dogs showed markedly elevated gamma-hydroxybutyric acid in serum, cerebrospinal fluid (CSF) and brain, and elevated succinate semialdehyde in urine, CSF and brain. SSADH activity in the brain of affected dogs was low. Affected Saluki dogs had striking similarities to SSADH deficiency in humans although hydroxybutyric aciduria was absent in affected dogs. ALDH5A1-related SSADH deficiency in Salukis provides a unique translational large animal model for the development of novel therapeutic strategies.
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Affiliation(s)
- Karen M. Vernau
- Department of Surgical and Radiological Sciences, University of California Davis, Davis, CA 95616, USA; (D.D.C.); (P.J.D.)
- Correspondence: (K.M.V.); (D.L.B.)
| | - Eduard Struys
- Department of Clinical Chemistry, VU University Medical Center, 1081 HV Amsterdam, The Netherlands; (E.S.); (B.R.)
| | - Anna Letko
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland; (A.L.); (V.J.); (C.D.)
| | - Kevin D. Woolard
- Department of Pathology, Microbiology and Immunology, University of California Davis, Davis, CA 95616, USA;
| | - Miriam Aguilar
- Department of Population Health and Reproduction, University of California Davis, Davis, CA 95616, USA; (M.A.); (E.A.B.); (T.A.M.); (C.T.B.)
| | - Emily A. Brown
- Department of Population Health and Reproduction, University of California Davis, Davis, CA 95616, USA; (M.A.); (E.A.B.); (T.A.M.); (C.T.B.)
| | - Derek D. Cissell
- Department of Surgical and Radiological Sciences, University of California Davis, Davis, CA 95616, USA; (D.D.C.); (P.J.D.)
| | - Peter J. Dickinson
- Department of Surgical and Radiological Sciences, University of California Davis, Davis, CA 95616, USA; (D.D.C.); (P.J.D.)
| | - G. Diane Shelton
- Department of Pathology, University of California San Diego, La Jolla, CA 92093, USA;
| | | | - K. Michael Gibson
- College of Pharmacy and Pharmaceutical Sciences, Washington State University, Spokane, WA 99202, USA;
| | | | - Florian König
- Fachtierarzt fur Kleintiere, Am Berggewann 13, 65199 Wiesbaden, Germany;
| | - Thomas J. Van Winkle
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA;
| | - Dennis O’Brien
- College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA;
| | - B. Roos
- Department of Clinical Chemistry, VU University Medical Center, 1081 HV Amsterdam, The Netherlands; (E.S.); (B.R.)
| | - Kaspar Matiasek
- Clinical and Comparative Neuropathology, Ludwig-Maximilians-Universitaet München, 80539 Munchen, Germany;
| | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland; (A.L.); (V.J.); (C.D.)
| | - Cord Drögemüller
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland; (A.L.); (V.J.); (C.D.)
| | - Tamer A. Mansour
- Department of Population Health and Reproduction, University of California Davis, Davis, CA 95616, USA; (M.A.); (E.A.B.); (T.A.M.); (C.T.B.)
- Department of Clinical Pathology, School of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - C. Titus Brown
- Department of Population Health and Reproduction, University of California Davis, Davis, CA 95616, USA; (M.A.); (E.A.B.); (T.A.M.); (C.T.B.)
| | - Danika L. Bannasch
- Department of Population Health and Reproduction, University of California Davis, Davis, CA 95616, USA; (M.A.); (E.A.B.); (T.A.M.); (C.T.B.)
- Correspondence: (K.M.V.); (D.L.B.)
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Abstract
Neurologic disease in horses can be particularly challenging to diagnose and treat. These diseases can result in economic losses, emotional distress to owners, and injury to the horse or handlers. To date, there are 5 neurologic diseases caused by known genetic mutations and several more are suspected to be heritable: lethal white foal syndrome, lavender foal syndrome, cerebellar abiotrophy, occipitoatlantoaxial malformation, and Friesian hydrocephalus. Genetic testing allows owners, breeders, and veterinarians to make informed decisions when selecting dams and sires for breeding or deciding the treatment or prognosis of a neurologic animal.
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Affiliation(s)
- Lisa Edwards
- Department of Veterinary Population Health and Reproduction, School of Veterinary Medicine, University of California Davis, Room 4206 Vet Med 3A One Shields Avenue, Davis, CA 95616, USA
| | - Carrie J Finno
- Department of Veterinary Population Health and Reproduction, School of Veterinary Medicine, University of California Davis, Room 4206 Vet Med 3A One Shields Avenue, Davis, CA 95616, USA.
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10
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Batcher K, Dickinson P, Maciejczyk K, Brzeski K, Rasouliha SH, Letko A, Drögemüller C, Leeb T, Bannasch D. Multiple FGF4 Retrocopies Recently Derived within Canids. Genes (Basel) 2020; 11:genes11080839. [PMID: 32717834 PMCID: PMC7465015 DOI: 10.3390/genes11080839] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/21/2020] [Accepted: 07/21/2020] [Indexed: 12/17/2022] Open
Abstract
Two transcribed retrocopies of the fibroblast growth factor 4 (FGF4) gene have previously been described in the domestic dog. An FGF4 retrocopy on chr18 is associated with disproportionate dwarfism, while an FGF4 retrocopy on chr12 is associated with both disproportionate dwarfism and intervertebral disc disease (IVDD). In this study, whole-genome sequencing data were queried to identify other FGF4 retrocopies that could be contributing to phenotypic diversity in canids. Additionally, dogs with surgically confirmed IVDD were assayed for novel FGF4 retrocopies. Five additional and distinct FGF4 retrocopies were identified in canids including a copy unique to red wolves (Canis rufus). The FGF4 retrocopies identified in domestic dogs were identical to domestic dog FGF4 haplotypes, which are distinct from modern wolf FGF4 haplotypes, indicating that these retrotransposition events likely occurred after domestication. The identification of multiple, full length FGF4 retrocopies with open reading frames in canids indicates that gene retrotransposition events occur much more frequently than previously thought and provide a mechanism for continued genetic and phenotypic diversity in canids.
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Affiliation(s)
- Kevin Batcher
- Department of Population Health and Reproduction, University of California-Davis, Davis, CA 95616, USA; (K.B.); (K.M.)
| | - Peter Dickinson
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA 95616, USA;
| | - Kimberly Maciejczyk
- Department of Population Health and Reproduction, University of California-Davis, Davis, CA 95616, USA; (K.B.); (K.M.)
| | - Kristin Brzeski
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI 49931, USA;
| | - Sheida Hadji Rasouliha
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland; (S.H.R.); (A.L.); (C.D.); (T.L.)
| | - Anna Letko
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland; (S.H.R.); (A.L.); (C.D.); (T.L.)
| | - Cord Drögemüller
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland; (S.H.R.); (A.L.); (C.D.); (T.L.)
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland; (S.H.R.); (A.L.); (C.D.); (T.L.)
| | - Danika Bannasch
- Department of Population Health and Reproduction, University of California-Davis, Davis, CA 95616, USA; (K.B.); (K.M.)
- Correspondence:
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11
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Bannasch DL, Baes CF, Leeb T. Genetic Variants Affecting Skeletal Morphology in Domestic Dogs. Trends Genet 2020; 36:598-609. [PMID: 32487495 DOI: 10.1016/j.tig.2020.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 05/12/2020] [Accepted: 05/14/2020] [Indexed: 12/25/2022]
Abstract
Purebred dog breeds provide a powerful resource for the discovery of genetic variants affecting skeletal morphology. Domesticated and subsequently purebred dogs have undergone strong artificial selection for a broad range of skeletal variation, which include both the size and shapes of their bones. While the phenotypic variation between breeds is high, within-breed morphological variation is typically low. Approaches for defining genetic variants associated with canine morphology include quantitative within-breed analyses, as well as across-breed analyses, using breed standards as proxies for individual measurements. The ability to identify variants across the genomes of individual dogs can now be paired with precise measures of morphological variation to define the genetic interactions and the phenotypic effect of variants on skeletal morphology.
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Affiliation(s)
- Danika L Bannasch
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA.
| | - Christine F Baes
- Department of Animal Biosciences, University of Guelph, Guelph, ON N1G 2W1, Canada; Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
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12
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Momozawa Y, Merveille AC, Battaille G, Wiberg M, Koch J, Willesen JL, Proschowsky HF, Gouni V, Chetboul V, Tiret L, Fredholm M, Seppälä EH, Lohi H, Georges M, Lequarré AS. Genome wide association study of 40 clinical measurements in eight dog breeds. Sci Rep 2020; 10:6520. [PMID: 32300138 PMCID: PMC7162946 DOI: 10.1038/s41598-020-63457-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 03/26/2020] [Indexed: 12/29/2022] Open
Abstract
The domestic dog represents an ideal model for identifying susceptibility genes, many of which are shared with humans. In this study, we investigated the genetic contribution to individual differences in 40 clinically important measurements by a genome-wide association study (GWAS) in a multinational cohort of 472 healthy dogs from eight breeds. Meta-analysis using the binary effects model after breed-specific GWAS, identified 13 genome-wide significant associations, three of them showed experimental-wide significant associations. We detected a signal at chromosome 13 for the serum concentration of alanine aminotransferase (ALT) in which we detected four breed-specific signals. A large proportion of the variance of ALT (18.1–47.7%) was explained by this locus. Similarly, a single SNP was also responsible for a large proportion of the variance (6.8–78.4%) for other measurements such as fructosamine, stress during physical exam, glucose, and morphometric measurements. The genetic contribution of single variant was much larger than in humans. These findings illustrate the importance of performing meta-analysis after breed-specific GWAS to reveal the genetic contribution to individual differences in clinically important measurements, which would lead to improvement of veterinary medicine.
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Affiliation(s)
- Yukihide Momozawa
- Unit of Animal Genomics, GIGA Institute, University of Liège, Liège, Belgium. .,Laboratory for Genotyping Development, RIKEN Center for Integrative Medical Sciences, Kanagawa, 230-0045, Japan.
| | - Anne-Christine Merveille
- Unit of Animal Genomics, GIGA Institute, University of Liège, Liège, Belgium.,Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Géraldine Battaille
- Unit of Animal Genomics, GIGA Institute, University of Liège, Liège, Belgium.,Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Maria Wiberg
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - Jørgen Koch
- Faculty of Health and Medical Sciences, University of Copenhagen, 1870, Frederiksberg C, Denmark
| | - Jakob Lundgren Willesen
- Faculty of Health and Medical Sciences, University of Copenhagen, 1870, Frederiksberg C, Denmark
| | | | - Vassiliki Gouni
- U955 - IMRB Inserm and Unité de Cardiologie d'Alfort (UCA), Université Paris-Est, École Nationale Vétérinaire d'Alfort, UPEC, 7 avenue du général de Gaulle, Maisons-Alfort, F-94700, France
| | - Valérie Chetboul
- U955 - IMRB Inserm and Unité de Cardiologie d'Alfort (UCA), Université Paris-Est, École Nationale Vétérinaire d'Alfort, UPEC, 7 avenue du général de Gaulle, Maisons-Alfort, F-94700, France
| | - Laurent Tiret
- U955 - IMRB, Biology of the neuromuscular system, Inserm, National Veterinary School of Alfort (ENVA), Maisons-Alfort, France
| | - Merete Fredholm
- Faculty of Health and Medical Sciences, University of Copenhagen, 1870, Frederiksberg C, Denmark
| | - Eija H Seppälä
- Department of Veterinary Biosciences, Department of Medical and Clinical Genetics, University of Helsinki, Folkhälsan Research Center, Helsinki, Finland
| | - Hannes Lohi
- Department of Veterinary Biosciences, Department of Medical and Clinical Genetics, University of Helsinki, Folkhälsan Research Center, Helsinki, Finland
| | - Michel Georges
- Unit of Animal Genomics, GIGA Institute, University of Liège, Liège, Belgium.,Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Anne-Sophie Lequarré
- Unit of Animal Genomics, GIGA Institute, University of Liège, Liège, Belgium. .,Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.
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13
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Mansour TA, Woolard KD, Vernau KL, Ancona DM, Thomasy SM, Sebbag L, Moore BA, Knipe MF, Seada HA, Cowan TM, Aguilar M, Titus Brown C, Bannasch DL. Whole genome sequencing for mutation discovery in a single case of lysosomal storage disease (MPS type 1) in the dog. Sci Rep 2020; 10:6558. [PMID: 32300136 PMCID: PMC7162951 DOI: 10.1038/s41598-020-63451-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 03/06/2020] [Indexed: 01/08/2023] Open
Abstract
Mucopolysaccharidosis (MPS) is a metabolic storage disorder caused by the deficiency of any lysosomal enzyme required for the breakdown of glycosaminoglycans. A 15-month-old Boston Terrier presented with clinical signs consistent with lysosomal storage disease including corneal opacities, multifocal central nervous system disease and progressively worsening clinical course. Diagnosis was confirmed at necropsy based on histopathologic evaluation of multiple organs demonstrating accumulation of mucopolysaccharides. Whole genome sequencing was used to uncover a frame-shift insertion affecting the alpha-L-iduronidase (IDUA) gene (c.19_20insCGGCCCCC), a mutation confirmed in another Boston Terrier presented 2 years later with a similar clinical picture. Both dogs were homozygous for the IDUA mutation and shared coat colors not recognized as normal for the breed by the American Kennel Club. In contrast, the mutation was not detected in 120 unrelated Boston Terriers as well as 202 dogs from other breeds. Recent inbreeding to select for recessive and unusual coat colors may have concentrated this relatively rare allele in the breed. The identification of the variant enables ante-mortem diagnosis of similar cases and selective breeding to avoid the spread of this disease in the breed. Boston Terriers carrying this variant represent a promising model for MPS I with neurological abnormalities in humans.
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Affiliation(s)
- Tamer A Mansour
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, United States.
- Department of Clinical Pathology, School of Medicine, Mansoura University, Mansoura, Egypt.
| | - Kevin D Woolard
- Department of Pathology, Immunology and Microbiology, School of Veterinary Medicine, University of California, Davis, CA, United States
| | - Karen L Vernau
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA, United States
| | - Devin M Ancona
- VCA West Coast Specialty and Emergency Animal Hospital, Fountain Valley, CA, United States
| | - Sara M Thomasy
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA, United States
- Department of Ophthalmology & Vision Science, School of Medicine, University of California, Davis, CA, United States
| | - Lionel Sebbag
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Bret A Moore
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA, United States
| | - Marguerite F Knipe
- William R Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, CA, United States
| | - Haitham A Seada
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States
| | - Tina M Cowan
- Department of Pathology, Stanford University, Palo Alto, CA, United States
| | - Miriam Aguilar
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, United States
| | - C Titus Brown
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, United States
| | - Danika L Bannasch
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, United States.
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14
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TSEN54 missense variant in Standard Schnauzers with leukodystrophy. PLoS Genet 2019; 15:e1008411. [PMID: 31584937 PMCID: PMC6795476 DOI: 10.1371/journal.pgen.1008411] [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: 06/17/2019] [Revised: 10/16/2019] [Accepted: 09/10/2019] [Indexed: 12/13/2022] Open
Abstract
We report a hereditary leukodystrophy in Standard Schnauzer puppies. Clinical signs occurred shortly after birth or started at an age of under 4 weeks and included apathy, dysphoric vocalization, hypermetric ataxia, intension tremor, head tilt, circling, proprioceptive deficits, seizures and ventral strabismus consistent with a diffuse intracranial lesion. Magnetic resonance imaging revealed a diffuse white matter disease without mass effect. Macroscopically, the cerebral white matter showed a gelatinous texture in the centrum semiovale. A mild hydrocephalus internus was noted. Histopathologically, a severe multifocal reduction of myelin formation and moderate diffuse edema without inflammation was detected leading to the diagnosis of leukodystrophy. Combined linkage analysis and homozygosity mapping in two related families delineated critical intervals of approximately 29 Mb. The comparison of whole genome sequence data of one affected Standard Schnauzer to 221 control genomes revealed a single private homozygous protein changing variant in the critical intervals, TSEN54:c.371G>A or p.(Gly124Asp). TSEN54 encodes the tRNA splicing endonuclease subunit 54. In humans, several variants in TSEN54 were reported to cause different types of pontocerebellar hypoplasia. The genotypes at the c.371G>A variant were perfectly associated with the leukodystrophy phenotype in 12 affected Standard Schnauzers and almost 1000 control dogs from different breeds. These results suggest that TSEN54:c.371G>A causes the leukodystrophy. The identification of a candidate causative variant enables genetic testing so that the unintentional breeding of affected Standard Schnauzers can be avoided in the future. Our findings extend the known genotype-phenotype correlation for TSEN54 variants. Various hereditary diseases of the cerebral white matter occur in humans and dogs. We describe a new leukodystrophy in Standard Schnauzers. Genetic mapping and whole genome sequence analysis identified a likely candidate causative variant in the TSEN54 gene encoding tRNA splicing endonuclease 54. These results provide new information about the role of TSEN54 in cell metabolism and the development of the central nervous system in the late gestational and early post-natal period. The affected dogs potentially represent a translational large animal model for similar leukoencephalopathies in human medicine. The clinical phenotype in Schnauzers included multifocal central nervous system signs. A holistic pathogenically driven understanding of disease initiation and perpetuation requires a solid analysis of the underlying genetics and characterization of the disease phenotype at the clinical and cellular as well as sub-cellular level. In contrast to the canine phenotype with a predominant manifestation in the cerebrum white matter, other TSEN54 variants in humans have been reported to result in a different pathological phenotype characterized by pontocerebellar hypoplasia. The differences between humans and dogs underscore the need for comparative analysis at the clinical, pathological and molecular level to understand species-specific protein mediated pathways, interactions and outcomes.
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15
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van der Beek J, Jonker C, van der Welle R, Liv N, Klumperman J. CORVET, CHEVI and HOPS – multisubunit tethers of the endo-lysosomal system in health and disease. J Cell Sci 2019; 132:132/10/jcs189134. [DOI: 10.1242/jcs.189134] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
ABSTRACT
Multisubunit tethering complexes (MTCs) are multitasking hubs that form a link between membrane fusion, organelle motility and signaling. CORVET, CHEVI and HOPS are MTCs of the endo-lysosomal system. They regulate the major membrane flows required for endocytosis, lysosome biogenesis, autophagy and phagocytosis. In addition, individual subunits control complex-independent transport of specific cargoes and exert functions beyond tethering, such as attachment to microtubules and SNARE activation. Mutations in CHEVI subunits lead to arthrogryposis, renal dysfunction and cholestasis (ARC) syndrome, while defects in CORVET and, particularly, HOPS are associated with neurodegeneration, pigmentation disorders, liver malfunction and various forms of cancer. Diseases and phenotypes, however, vary per affected subunit and a concise overview of MTC protein function and associated human pathologies is currently lacking. Here, we provide an integrated overview on the cellular functions and pathological defects associated with CORVET, CHEVI or HOPS proteins, both with regard to their complexes and as individual subunits. The combination of these data provides novel insights into how mutations in endo-lysosomal proteins lead to human pathologies.
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Affiliation(s)
- Jan van der Beek
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Caspar Jonker
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Reini van der Welle
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Nalan Liv
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
| | - Judith Klumperman
- Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Institute for Biomembranes, Utrecht University, Utrecht 3584 CX, The Netherlands
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16
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Vps11 and Vps18 of Vps-C membrane traffic complexes are E3 ubiquitin ligases and fine-tune signalling. Nat Commun 2019; 10:1833. [PMID: 31015428 PMCID: PMC6478910 DOI: 10.1038/s41467-019-09800-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 04/02/2019] [Indexed: 12/11/2022] Open
Abstract
In response to extracellular signals, many signalling proteins associated with the plasma membrane are sorted into endosomes. This involves endosomal fusion, which depends on the complexes HOPS and CORVET. Whether and how their subunits themselves modulate signal transduction is unknown. We show that Vps11 and Vps18 (Vps11/18), two common subunits of the HOPS/CORVET complexes, are E3 ubiquitin ligases. Upon overexpression of Vps11/Vps18, we find perturbations of ubiquitination in signal transduction pathways. We specifically demonstrate that Vps11/18 regulate several signalling factors and pathways, including Wnt, estrogen receptor α (ERα), and NFκB. For ERα, we demonstrate that the Vps11/18-mediated ubiquitination of the scaffold protein PELP1 impairs the activation of ERα by c-Src. Thus, proteins involved in membrane traffic, in addition to performing their well-described role in endosomal fusion, fine-tune signalling in several different ways, including through ubiquitination.
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