1
|
Tirendi S, Domenicotti C, Bassi AM, Vernazza S. Genetics and Glaucoma: the state of the art. Front Med (Lausanne) 2023; 10:1289952. [PMID: 38152303 PMCID: PMC10751926 DOI: 10.3389/fmed.2023.1289952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 11/28/2023] [Indexed: 12/29/2023] Open
Abstract
Glaucoma is the second leading cause of irreversible blindness worldwide. Although genetic background contributes differently to rare early-onset glaucoma (before age 40) or common adult-onset glaucoma, it is now considered an important factor in all major forms of the disease. Genetic and genomic studies, including GWAS, are contributing to identifying novel loci associated with glaucoma or to endophenotypes across ancestries to enrich the knowledge about glaucoma genetic susceptibility. Moreover, new high-throughput functional genomics contributes to defining the relevance of genetic results in the biological pathways and processes involved in glaucoma pathogenesis. Such studies are expected to advance significantly our understanding of glaucoma's genetic basis and provide new druggable targets to treat glaucoma. This review gives an overview of the role of genetics in the pathogenesis or risk of glaucoma.
Collapse
Affiliation(s)
- Sara Tirendi
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
| | - Cinzia Domenicotti
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
| | - Anna Maria Bassi
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
| | - Stefania Vernazza
- Department of Experimental Medicine, University of Genoa, Genoa, Italy
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), Genoa, Italy
| |
Collapse
|
2
|
van der Heide C, Goar W, Meyer KJ, Alward WLM, Boese EA, Sears NC, Roos BR, Kwon YH, DeLuca AP, Siggs OM, Gonzaga-Jauregui C, Sheffield VC, Wang K, Stone EM, Mullins RF, Anderson MG, Fan BJ, Ritch R, Craig JE, Wiggs JL, Scheetz TE, Fingert JH. Exome-based investigation of the genetic basis of human pigmentary glaucoma. BMC Genomics 2021; 22:477. [PMID: 34174832 PMCID: PMC8235805 DOI: 10.1186/s12864-021-07782-0] [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] [Received: 04/06/2021] [Accepted: 06/07/2021] [Indexed: 11/18/2022] Open
Abstract
Background Glaucoma is a leading cause of visual disability and blindness. Release of iris pigment within the eye, pigment dispersion syndrome (PDS), can lead to one type of glaucoma known as pigmentary glaucoma. PDS has a genetic component, however, the genes involved with this condition are largely unknown. We sought to discover genes that cause PDS by testing cohorts of patients and controls for mutations using a tiered analysis of exome data. Results Our primary analysis evaluated melanosome-related genes that cause dispersion of iris pigment in mice (TYRP1, GPNMB, LYST, DCT, and MITF). We identified rare mutations, but they were not statistically enriched in PDS patients. Our secondary analyses examined PMEL (previously linked with PDS), MRAP, and 19 other genes. Four MRAP mutations were identified in PDS cases but not in controls (p = 0.016). Immunohistochemical analysis of human donor eyes revealed abundant MRAP protein in the iris, the source of pigment in PDS. However, analysis of MRAP in additional cohorts (415 cases and 1645 controls) did not support an association with PDS. We also did not confirm a link between PMEL and PDS in our cohorts due to lack of reported mutations and similar frequency of the variants in PDS patients as in control subjects. Conclusions We did not detect a statistical enrichment of mutations in melanosome-related genes in human PDS patients and we found conflicting data about the likely pathogenicity of MRAP mutations. PDS may have a complex genetic basis that is not easily unraveled with exome analyses. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07782-0.
Collapse
Affiliation(s)
- Carly van der Heide
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA.,Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Wes Goar
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Kacie J Meyer
- Institute for Vision Research, University of Iowa, Iowa City, IA, USA.,Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Wallace L M Alward
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Erin A Boese
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Nathan C Sears
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Ben R Roos
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Young H Kwon
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Adam P DeLuca
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Owen M Siggs
- Department of Ophthalmology, Flinders Medical Centre, Adelaide, South Australia, Australia.,Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
| | | | - Val C Sheffield
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA.,Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Kai Wang
- Institute for Vision Research, University of Iowa, Iowa City, IA, USA.,Department of Biostatistics, College of Public Health, University of Iowa, Iowa City, Iowa, USA
| | - Edwin M Stone
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Robert F Mullins
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - Michael G Anderson
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA.,Department of Molecular Physiology and Biophysics, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.,VA Center for the Prevention and Treatment of Visual Loss, Iowa City VA Healthcare System, Iowa City, IA, USA
| | - Bao Jian Fan
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Boston, Boston, MA, USA
| | - Robert Ritch
- Einhorn Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, USA
| | - Jamie E Craig
- Department of Ophthalmology, Flinders Medical Centre, Adelaide, South Australia, Australia
| | - Janey L Wiggs
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Boston, Boston, MA, USA
| | - Todd E Scheetz
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA.,Institute for Vision Research, University of Iowa, Iowa City, IA, USA
| | - John H Fingert
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, 3111B Medical Education and Research Facility, University of Iowa, 375 Newton Road, Iowa City, IA52245, USA. .,Institute for Vision Research, University of Iowa, Iowa City, IA, USA.
| |
Collapse
|
3
|
The Role of iPSC Modeling Toward Projection of Autophagy Pathway in Disease Pathogenesis: Leader or Follower. Stem Cell Rev Rep 2020; 17:539-561. [PMID: 33245492 DOI: 10.1007/s12015-020-10077-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2020] [Indexed: 12/12/2022]
Abstract
Autophagy is responsible for degradation of non-essential or damaged cellular constituents and damaged organelles. The autophagy pathway maintains efficient cellular metabolism and reduces cellular stress by removing additional and pathogenic components. Dysfunctional autophagy underlies several diseases. Thus, several research groups have worked toward elucidating key steps in this pathway. Autophagy can be studied by animal modeling, chemical modulators, and in vitro disease modeling with induced pluripotent stem cells (iPSC) as a loss-of-function platform. The introduction of iPSC technology, which has the capability to maintain the genetic background, has facilitated in vitro modeling of some diseases. Furthermore, iPSC technology can be used as a platform to study defective cellular and molecular pathways during development and unravel novel steps in signaling pathways of health and disease. Different studies have used iPSC technology to explore the role of autophagy in disease pathogenesis which could not have been addressed by animal modeling or chemical inducers/inhibitors. In this review, we discuss iPSC models of autophagy-associated disorders where the disease is caused due to mutations in autophagy-related genes. We classified this group as "primary autophagy induced defects (PAID)". There are iPSC models of diseases in which the primary cause is not dysfunctional autophagy, but autophagy is impaired secondary to disease phenotypes. We call this group "secondary autophagy induced defects (SAID)" and discuss them. Graphical abstract.
Collapse
|
4
|
Boese EA, Tollefson MR, Schnieders MJ, Darbro BW, Alward WLM, Fingert JH. Novel Intragenic PAX6 Deletion in a Pedigree with Aniridia, Morbid Obesity, and Diabetes. Curr Eye Res 2020; 45:91-96. [PMID: 31361967 PMCID: PMC10413309 DOI: 10.1080/02713683.2019.1649704] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 07/18/2019] [Accepted: 07/20/2019] [Indexed: 10/26/2022]
Abstract
Purpose: Aniridia is a rare congenital eye disease, characterized by a constellation of symptoms including hypoplastic irides, foveal hypoplasia, early cataract, corneal stem cell deficiency, and glaucoma. Large chromosomal deletions spanning the PAX6 gene cause WAGR syndrome (Wilms tumor, aniridia, genitourinary anomalies, and intellectual disability [formerly called mental retardation]). We describe clinical and genetic studies of a three-generation pedigree with aniridia along with additional systemic conditions (morbid obesity, diabetes) suggesting the possibility of a contiguous-gene syndrome like WAGR.Methods: Clinical records were obtained and DNA was prepared from blood samples from three of the four patients and tested for mutations in the coding sequences of the PAX6 gene. The index patient also had cardiomyopathy and was tested for known cardiomyopathy genetic mutations using a next-generation DNA sequencing assay.Results: We discovered a novel intragenic PAX6 mutation, a 16 bp heterozygous deletion c.203delCCAGGGCAATCGGTGG, with Sanger sequencing that is the likely cause of autosomal dominant aniridia in this pedigree. This PAX6 deletion causes a frameshift in predicted protein translation and a subsequent premature termination, p.Pro68Leufs*6. The PAX6 deletion was detected in all three available family members with aniridia, the index patient, his mother, and his maternal aunt but was not observed in the Exome Aggregation Consortium (ExAC) database. Targeted sequencing of known cardiomyopathy genes in the index patient identified a second mutation, a 1.7 Mp deletion that spans the MYBPC3 gene.Conclusions: We report a pedigree with aniridia and other systemic abnormalities that were initially suspicious for a contiguous-gene syndrome like WAGR. However, genetic analysis of the pedigree revealed two independent genetic abnormalities on chromosome 11p: 1) a novel PAX6 mutation, and 2) a large chromosome deletion spanning MYBPC3, a known cardiomyopathy gene. It is unclear if morbid obesity and type II diabetes mellitus have a related genetic cause.
Collapse
Affiliation(s)
- Erin A Boese
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Mallory R Tollefson
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Michael J Schnieders
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Benjamin W Darbro
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Wallace L M Alward
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - John H Fingert
- Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| |
Collapse
|
5
|
O'Koren EG, Yu C, Klingeborn M, Wong AYW, Prigge CL, Mathew R, Kalnitsky J, Msallam RA, Silvin A, Kay JN, Bowes Rickman C, Arshavsky VY, Ginhoux F, Merad M, Saban DR. Microglial Function Is Distinct in Different Anatomical Locations during Retinal Homeostasis and Degeneration. Immunity 2019; 50:723-737.e7. [PMID: 30850344 DOI: 10.1016/j.immuni.2019.02.007] [Citation(s) in RCA: 211] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 10/03/2018] [Accepted: 02/12/2019] [Indexed: 01/09/2023]
Abstract
Microglia from different nervous system regions are molecularly and anatomically distinct, but whether they also have different functions is unknown. We combined lineage tracing, single-cell transcriptomics, and electrophysiology of the mouse retina and showed that adult retinal microglia shared a common developmental lineage and were long-lived but resided in two distinct niches. Microglia in these niches differed in their interleukin-34 dependency and functional contribution to visual-information processing. During certain retinal-degeneration models, microglia from both pools relocated to the subretinal space, an inducible disease-associated niche that was poorly accessible to monocyte-derived cells. This microglial transition involved transcriptional reprogramming of microglia, characterized by reduced expression of homeostatic checkpoint genes and upregulation of injury-responsive genes. This transition was associated with protection of the retinal pigmented epithelium from damage caused by disease. Together, our data demonstrate that microglial function varies by retinal niche, thereby shedding light on the significance of microglia heterogeneity.
Collapse
Affiliation(s)
- Emily G O'Koren
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA
| | - Chen Yu
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA
| | | | - Alicia Y W Wong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A(∗)STAR), Singapore 138648, Singapore
| | - Cameron L Prigge
- Department of Neurobiology, Duke University, Durham, NC 27710, USA
| | - Rose Mathew
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA
| | - Joan Kalnitsky
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA
| | - Rasha A Msallam
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A(∗)STAR), Singapore 138648, Singapore
| | - Aymeric Silvin
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A(∗)STAR), Singapore 138648, Singapore
| | - Jeremy N Kay
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA; Department of Neurobiology, Duke University, Durham, NC 27710, USA
| | - Catherine Bowes Rickman
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA; Department of Cell Biology, Duke University, Durham, NC 27710, USA
| | - Vadim Y Arshavsky
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA; Department of Pharmacology, Duke University, Durham, NC 27710, USA
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A(∗)STAR), Singapore 138648, Singapore
| | - Miriam Merad
- Precision Immunology Institute and Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Daniel R Saban
- Department of Ophthalmology, Duke University, Durham, NC 27710, USA; Department of Immunology, Duke University, Durham, NC 27710, USA.
| |
Collapse
|
6
|
Ryan TA, Tumbarello DA. Optineurin: A Coordinator of Membrane-Associated Cargo Trafficking and Autophagy. Front Immunol 2018; 9:1024. [PMID: 29867991 PMCID: PMC5962687 DOI: 10.3389/fimmu.2018.01024] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/24/2018] [Indexed: 12/13/2022] Open
Abstract
Optineurin is a multifunctional adaptor protein intimately involved in various vesicular trafficking pathways. Through interactions with an array of proteins, such as myosin VI, huntingtin, Rab8, and Tank-binding kinase 1, as well as via its oligomerisation, optineurin has the ability to act as an adaptor, scaffold, or signal regulator to coordinate many cellular processes associated with the trafficking of membrane-delivered cargo. Due to its diverse interactions and its distinct functions, optineurin is an essential component in a number of homeostatic pathways, such as protein trafficking and organelle maintenance. Through the binding of polyubiquitinated cargoes via its ubiquitin-binding domain, optineurin also serves as a selective autophagic receptor for the removal of a wide range of substrates. Alternatively, it can act in an ubiquitin-independent manner to mediate the clearance of protein aggregates. Regarding its disease associations, mutations in the optineurin gene are associated with glaucoma and have more recently been found to correlate with Paget’s disease of bone and amyotrophic lateral sclerosis (ALS). Indeed, ALS-associated mutations in optineurin result in defects in neuronal vesicular localisation, autophagosome–lysosome fusion, and secretory pathway function. More recent molecular and functional analysis has shown that it also plays a role in mitophagy, thus linking it to a number of other neurodegenerative conditions, such as Parkinson’s. Here, we review the role of optineurin in intracellular membrane trafficking, with a focus on autophagy, and describe how upstream signalling cascades are critical to its regulation. Current data and contradicting reports would suggest that optineurin is an important and selective autophagy receptor under specific conditions, whereby interplay, synergy, and functional redundancy with other receptors occurs. We will also discuss how dysfunction in optineurin-mediated pathways may lead to perturbation of critical cellular processes, which can drive the pathologies of number of diseases. Therefore, further understanding of optineurin function, its target specificity, and its mechanism of action will be critical in fully delineating its role in human disease.
Collapse
Affiliation(s)
- Thomas A Ryan
- Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - David A Tumbarello
- Biological Sciences, University of Southampton, Southampton, United Kingdom
| |
Collapse
|
7
|
Wiggs JL, Pasquale LR. Genetics of glaucoma. Hum Mol Genet 2017; 26:R21-R27. [PMID: 28505344 DOI: 10.1093/hmg/ddx184] [Citation(s) in RCA: 217] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 05/08/2017] [Indexed: 12/15/2022] Open
Abstract
Genetic and genomic studies, including genome-wide association studies (GWAS) have accelerated the discovery of genes contributing to glaucoma, the leading cause of irreversible blindness world-wide. Glaucoma can occur at all ages, with Mendelian inheritance typical for the rare early onset disease (before age 40) and complex inheritance evident in common adult-onset forms of disease. Recent studies have suggested possible therapeutic targets for some patients with early-onset glaucoma based on the molecular and cellular events caused by MYOC, OPTN and TBK1 mutations. Diagnostic genetic tests using early-onset glaucoma genes are also proving useful for pre-symptomatic disease detection and genetic counseling. Recent GWAS completed for three types of common adult-onset glaucoma have identified novel loci for POAG (primary-open-angle glaucoma) (ABCA1, AFAP1, GMDS, PMM2, TGFBR3, FNDC3B, ARHGEF12, GAS7, FOXC1, ATXN2, TXNRD2); PACG (primary angle-closure glaucoma (EPDR1, CHAT, GLIS3, FERMT2, DPM2-FAM102); and exfoliation syndrome (XFS) glaucoma (CACNA1A). In total sixteen genomic regions have been associated with POAG (including the normal tension glaucoma (NTG) subgroup), 8 with PACG and 2 with XFS. These studies are defining important biological pathways and processes that contribute to disease pathogenesis.
Collapse
Affiliation(s)
- Janey L Wiggs
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear, Boston, MA 02114, USA
| | - Louis R Pasquale
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear, Boston, MA 02114, USA.,Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02114, USA
| |
Collapse
|
8
|
He L, Chen L, Li L. The TBK1-OPTN Axis Mediates Crosstalk Between Mitophagy and the Innate Immune Response: A Potential Therapeutic Target for Neurodegenerative Diseases. Neurosci Bull 2017; 33:354-356. [PMID: 28271436 DOI: 10.1007/s12264-017-0116-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 01/24/2017] [Indexed: 02/02/2023] Open
Affiliation(s)
- Lu He
- Department of Neurosurgery, First Affiliated Hospital, University of South China, Hengyang, 421001, China
| | - Linxi Chen
- Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug StudyUniversity of South China, Hengyang, 421001, China
| | - Lanfang Li
- Department of Neurosurgery, First Affiliated Hospital, University of South China, Hengyang, 421001, China. .,Institute of Pharmacy and Pharmacology, Hunan Province Cooperative Innovation Center for Molecular Target New Drug StudyUniversity of South China, Hengyang, 421001, China.
| |
Collapse
|
9
|
Gang Q, Bettencourt C, Machado PM, Brady S, Holton JL, Pittman AM, Hughes D, Healy E, Parton M, Hilton-Jones D, Shieh PB, Needham M, Liang C, Zanoteli E, de Camargo LV, De Paepe B, De Bleecker J, Shaibani A, Ripolone M, Violano R, Moggio M, Barohn RJ, Dimachkie MM, Mora M, Mantegazza R, Zanotti S, Singleton AB, Hanna MG, Houlden H. Rare variants in SQSTM1 and VCP genes and risk of sporadic inclusion body myositis. Neurobiol Aging 2016; 47:218.e1-218.e9. [PMID: 27594680 PMCID: PMC5082791 DOI: 10.1016/j.neurobiolaging.2016.07.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 06/27/2016] [Accepted: 07/29/2016] [Indexed: 12/14/2022]
Abstract
Genetic factors have been suggested to be involved in the pathogenesis of sporadic inclusion body myositis (sIBM). Sequestosome 1 (SQSTM1) and valosin-containing protein (VCP) are 2 key genes associated with several neurodegenerative disorders but have yet to be thoroughly investigated in sIBM. A candidate gene analysis was conducted using whole-exome sequencing data from 181 sIBM patients, and whole-transcriptome expression analysis was performed in patients with genetic variants of interest. We identified 6 rare missense variants in the SQSTM1 and VCP in 7 sIBM patients (4.0%). Two variants, the SQSTM1 p.G194R and the VCP p.R159C, were significantly overrepresented in this sIBM cohort compared with controls. Five of these variants had been previously reported in patients with degenerative diseases. The messenger RNA levels of major histocompatibility complex genes were upregulated, this elevation being more pronounced in SQSTM1 patient group. We report for the first time potentially pathogenic SQSTM1 variants and expand the spectrum of VCP variants in sIBM. These data suggest that defects in neurodegenerative pathways may confer genetic susceptibility to sIBM and reinforce the mechanistic overlap in these neurodegenerative disorders.
Collapse
Affiliation(s)
- Qiang Gang
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London, UK; MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK
| | - Conceição Bettencourt
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London, UK; Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, Queen Square, London, UK
| | - Pedro M Machado
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London, UK; MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK; Centre for Rheumatology, Division of Medicine, University College London, London, UK
| | - Stefen Brady
- MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK; Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, Oxford, UK
| | - Janice L Holton
- MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK
| | - Alan M Pittman
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London, UK; Reta Lila Weston Laboratories, UCL Institute of Neurology, London, UK
| | - Deborah Hughes
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London, UK
| | - Estelle Healy
- MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK
| | - Matthew Parton
- MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK
| | - David Hilton-Jones
- Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, Oxford, UK
| | - Perry B Shieh
- Department of Neurology, University of California, Los Angeles, Los Angeles, CA, USA
| | - Merrilee Needham
- Western Australian Neurosciences Research Institute (WANRI), University of Western Australia and Murdoch University, Fiona Stanley Hospital, Perth, Australia
| | - Christina Liang
- Department of Neurology, Royal North Shore Hospital, New South Wales, Australia
| | - Edmar Zanoteli
- Department of Neurology, Medical School of the University of São Paulo (FMUSP), São Paulo, Brazil
| | | | - Boel De Paepe
- Department of Neurology and Neuromuscular Reference Centre, Ghent University Hospital, Ghent, Belgium
| | - Jan De Bleecker
- Department of Neurology and Neuromuscular Reference Centre, Ghent University Hospital, Ghent, Belgium
| | | | - Michela Ripolone
- Neuromuscular Unit, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, University of Milan, Milan, Italy
| | - Raffaella Violano
- Neuromuscular Unit, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, University of Milan, Milan, Italy
| | - Maurizio Moggio
- Neuromuscular Unit, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, University of Milan, Milan, Italy
| | | | | | - Marina Mora
- Neuromuscular Diseases and Neuroimmunology Unit, Fondazione IRCCS Isitituto Neurologico C. Besta, Milano, Italy
| | - Renato Mantegazza
- Neuromuscular Diseases and Neuroimmunology Unit, Fondazione IRCCS Isitituto Neurologico C. Besta, Milano, Italy
| | - Simona Zanotti
- Neuromuscular Diseases and Neuroimmunology Unit, Fondazione IRCCS Isitituto Neurologico C. Besta, Milano, Italy
| | - Andrew B Singleton
- Laboratory of Neurogenetics, National Institute on Aging, National Institute of Health, Bethesda, MD, USA
| | - Michael G Hanna
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London, UK; MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK.
| | - Henry Houlden
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London, UK; MRC Centre for Neuromuscular Diseases, Institute of Neurology, University College London, Queen Square, London, UK; Neurogenetics Laboratory, Institute of Neurology, University College London, Queen Square, London, UK.
| |
Collapse
|