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Cundy T. The Decline of Paget's Disease of Bone and Domestic Coal Use-A Hypothesis. Calcif Tissue Int 2024; 115:117-123. [PMID: 38902530 PMCID: PMC11246260 DOI: 10.1007/s00223-024-01241-0] [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: 04/25/2024] [Accepted: 05/23/2024] [Indexed: 06/22/2024]
Abstract
The cause of Paget's disease of bone (PDB) is unknown. It emerged as a distinct entity in Britain in the late nineteenth century when it was prevalent, and florid presentation not uncommon. Epidemiological surveys in the 1970s showed that Britain had a substantially higher prevalence of PDB than any other country. Studies in the late twentieth and early twenty-first centuries have documented an unexplained change in presentation, with a greatly reduced prevalence and less severe disease than formerly. The emergence of PDB in Britain coincided with rapid industrialization which, in turn, was driven by the use of coal for energy. In the home, bituminous coal was customarily burnt on an open hearth for heating. Using data on coal production, population size, and estimates of domestic use, the estimated exposure to domestic coal burning rose threefold in Britain during the nineteenth century and began to fall after 1900. This pattern fits well with the decline in PDB documented from death certification and prevalence surveys. Colonists moving from Britain to North America, Australia and New Zealand established coal mines and also used coal for domestic heating. PDB was found in these settler populations, but was largely absent from people indigenous to these lands. In all parts of the world PDB prevalence has fallen as the burning of coal in open hearths for domestic heating has reduced. The nature of the putative factor in coal that could initiate PDB is unknown, but possible candidates include both organic and inorganic constituents of bituminous coal.
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Affiliation(s)
- Tim Cundy
- Faculty of Medical & Health Sciences, University of Auckland, Auckland, Aotearoa New Zealand.
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2
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Rendina D, Falchetti A, Diacinti D, Bertoldo F, Merlotti D, Giannini S, Cianferotti L, Girasole G, Di Monaco M, Gonnelli S, Malavolta N, Minisola S, Vescini F, Rossini M, Frediani B, Chiodini I, Asciutti F, Gennari L. Diagnosis and treatment of Paget's disease of bone: position paper from the Italian Society of Osteoporosis, Mineral Metabolism and Skeletal Diseases (SIOMMMS). J Endocrinol Invest 2024; 47:1335-1360. [PMID: 38488978 PMCID: PMC11142991 DOI: 10.1007/s40618-024-02318-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 01/18/2024] [Indexed: 03/17/2024]
Abstract
INTRODUCTION Paget's disease of bone is a focal skeletal disorder causing bone deformities and impairing bone quality. Despite the prevalence of asymptomatic cases is increasing, the progression of the disease can lead to invalidating complications that compromise the quality of life. Doubts on clinical and therapeutic management aspects exist, although beneficial effects of antiresorptive drugs, particularly bisphosphonates are known. However, limited information is available from randomized controlled trials on the prevention of disease complications so that somewhat contrasting positions about treatment indications between expert panels from the main scientific societies of metabolic bone diseases exist. This task force, composed by expert representatives appointed by the Italian Society of Osteoporosis, Mineral Metabolism and Skeletal Diseases and members of the Italian Association of Paget's disease of bone, felt the necessity for more specific and up to date indications for an early diagnosis and clinical management. METHODS Through selected key questions, we propose evidence-based recommendations for the diagnosis and treatment of the disease. In the lack of good evidence to support clear recommendations, available information from the literature together with expert opinion of the panel was used to provide suggestions for the clinical practice. RESULTS AND CONCLUSION Description of the evidence quality and support of the strength of the statements was provided on each of the selected key questions. The diagnosis of PDB should be mainly based on symptoms and the typical biochemical and radiological features. While treatment is mandatory to all the symptomatic cases at diagnosis, less evidence is available on treatment indications in asymptomatic as well as in previously treated patients in the presence of biochemical recurrence. However, given the safety and long-term efficacy of potent intravenous bisphosphonates such as zoledronate, a suggestion to treat most if not all cases at the time of diagnosis was released.
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Affiliation(s)
- D Rendina
- Department of Clinical Medicine and Surgery, University of Naples "Federico II", 80138, Naples, Italy
| | - A Falchetti
- Department of Medical Biotechnology and Translational Medicine, University of Milan, 20122, Milan, Italy
| | - D Diacinti
- Department of Radiological Sciences, Oncology and Pathology, Sapienza University of Rome, Viale Regina Elena 324, 00161, Rome, Italy
| | - F Bertoldo
- Emergency Medicine, Department of Medicine, University of Verona, 37129, Verona, Italy
| | - D Merlotti
- Department of Medical Sciences, Azienda Ospedaliera Universitaria Senese, 53100, Siena, Italy
| | - S Giannini
- Clinica Medica 1, Department of Medicine, University of Padova, 35122, Padua, Italy
| | - L Cianferotti
- Bone Metabolic Diseases Unit, Department of Experimental, Clinical and Biomedical Sciences, University of Florence, 50121, Florence, Italy
| | - G Girasole
- Rheumatology Department, La Colletta" Hospital, ASL 3 Genovese, 16011, Arenzano, Italy
| | - M Di Monaco
- Osteoporosis Research Center, Fondazione Opera San Camillo, Presidio Di Torino, 10131, Turin, Italy
| | - S Gonnelli
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100, Siena, Italy
| | - N Malavolta
- Casa Di Cura Madre Fortunata Toniolo, and Centri Medici Dyadea, 40141, Bologna, Italy
| | - S Minisola
- U.O.C. Medicina Interna A, Malattie Metaboliche Dell'Osso Ambulatorio Osteoporosi E Osteopatie Fragilizzanti, Sapienza University of Rome, 00185, Rome, Italy
| | - F Vescini
- Unit of Endocrinology and Metabolism, University-Hospital S. M. Misericordia, Udine, Italy
| | - M Rossini
- Rheumatology Unit, University of Verona, Policlinico GB Rossi, 37134, Verona, Italy
| | - B Frediani
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100, Siena, Italy
| | - I Chiodini
- Department of Biotechnology and Translational Medicine, University of Milan, 20122, Milan, Italy
- Ospedale Niguarda Cà Granda, Piazza Ospedale Maggiore 3, 20161, Milan, Italy
| | - F Asciutti
- Associazione Italiana Malati Osteodistrofia Di Paget, Siena, Italy
| | - L Gennari
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100, Siena, Italy.
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3
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Corral Gudino L. [Paget's disease of bone: 1877-2023. Etiology, and management of a disease on epidemiologic transition]. Med Clin (Barc) 2023; 161:207-216. [PMID: 37263846 DOI: 10.1016/j.medcli.2023.05.005] [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: 04/22/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 06/03/2023]
Abstract
Paget's disease of bone is characterized by the alteration, in one or several bone locations, of the equilibrium between bone formation and bone resorption. This imbalance results in a disorganized, widened bone, in many cases with increased bone density, although more fragile. A genetic predisposition for Paget's disease of bone could explain between 5% and 40% of the cases. Different environmental factors should explain the rest of the cases. Paget's disease of bone was classically considered the second most common metabolic bone disease. However, in recent decades there has been a marked decrease in both incidence and clinical severity. These changes have led to believe that the influence of some environmental factor may have diminished or even disappeared. This decrease in incidence should not be an excuse for abandoning Paget's disease of bone research, but rather it should be the reason to remain searching to try to understand better its pathogenesis.
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Affiliation(s)
- Luis Corral Gudino
- Departamento de Medicina, Toxicología y Dermatología, Facultad de Medicina, Universidad de Valladolid, Valladolid, España; Servicio de Medicina Interna, Hospital Universitario Río Hortega, Sacyl, Valladolid, España.
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4
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Gennari L, Rendina D, Merlotti D, Cavati G, Mingiano C, Cosso R, Materozzi M, Pirrotta F, Abate V, Calabrese M, Falchetti A. Update on the pathogenesis and genetics of Paget’s disease of bone. Front Cell Dev Biol 2022; 10:932065. [PMID: 36035996 PMCID: PMC9412102 DOI: 10.3389/fcell.2022.932065] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 07/25/2022] [Indexed: 11/24/2022] Open
Abstract
Studies over the past two decades have led to major advances in the pathogenesis of Paget’s disease of bone (PDB) and particularly on the role of genetic factors. Germline mutations of different genes have been identified, as a possible cause of this disorder, and most of the underlying pathways are implicated in the regulation of osteoclast differentiation and function, whereas other are involved in cell autophagy mechanisms. In particular, about 30 different germline mutations of the Sequestosome 1 gene (SQSTM1) have been described in a significant proportion of familial and sporadic PDB cases. The majority of SQSTM1 mutations affect the ubiquitin-binding domain of the protein and are associated to a more severe clinical expression of the disease. Also, germline mutations in the ZNF687 and PFN1 genes have been associated to severe, early onset, polyostotic PDB with increased susceptibly to neoplastic degeneration, particularly giant cell tumor. Mutations in the VCP (Valosin Containing Protein) gene cause the autosomal dominant syndrome “Inclusion Body Myopathy, PDB, Fronto-temporal Dementia,” characterized by pagetic manifestations, associated with myopathy, amyotrophic lateral sclerosis and fronto-temporal dementia. Moreover, germline mutations in the TNFRSF11A gene, which encodes for RANK, were associated with rare syndromes showing some histopathological, radiological, and clinical overlap with PDB and in two cases of early onset PDB-like disease. Likewise, genome wide association studies performed in unrelated PDB cases identified other potential predisposition genes and/or susceptibility loci. Thus, it is likely that polygenic factors are involved in the PDB pathogenesis in many individuals and that modifying genes may contribute in refining the clinical phenotype. Moreover, the contribution of somatic mutations of SQSTM1 gene and/or epigenetic mechanisms in the pathogenesis of skeletal pagetic abnormalities and eventually neoplastic degeneration, cannot be excluded. Indeed, clinical and experimental observations indicate that genetic susceptibility might not be a sufficient condition for the clinical development of PDB without the concomitant intervention of viral infection, in primis paramixoviruses, and/or other environmental factors (e.g., pesticides, heavy metals or tobacco exposure), at least in a subset of cases. This review summarizes the most important advances that have been made in the field of cellular and molecular biology PDB over the past decades.
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Affiliation(s)
- Luigi Gennari
- Department of Medicine Surgery and Neurosciences, University of Siena Italy, Siena, Italy
- *Correspondence: Luigi Gennari, ; Alberto Falchetti,
| | - Domenico Rendina
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Daniela Merlotti
- Department of Medical Sciences, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Guido Cavati
- Department of Medicine Surgery and Neurosciences, University of Siena Italy, Siena, Italy
| | - Christian Mingiano
- Department of Medicine Surgery and Neurosciences, University of Siena Italy, Siena, Italy
| | - Roberta Cosso
- Unit of Rehabilitation Medicine, San Giuseppe Hospital, Istituto Auxologico Italiano, Piancavallo, Italy
| | - Maria Materozzi
- Department of Medicine Surgery and Neurosciences, University of Siena Italy, Siena, Italy
- Age Related Diseases Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milano, Italy
| | - Filippo Pirrotta
- Department of Medicine Surgery and Neurosciences, University of Siena Italy, Siena, Italy
| | - Veronica Abate
- Department of Clinical Medicine and Surgery, Federico II University, Naples, Italy
| | - Marco Calabrese
- Department of Medicine Surgery and Neurosciences, University of Siena Italy, Siena, Italy
| | - Alberto Falchetti
- Experimental Research Laboratory on Bone Metabolism, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Istituto Auxologico Italiano, Milano, Italy
- *Correspondence: Luigi Gennari, ; Alberto Falchetti,
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5
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Varenna M, Zucchi F, Crotti C, Manara M, Caporali R. Decreasing severity of Paget's disease of bone in northern Italy over the last two decades: results of a monocentric study on 391 patients. Osteoporos Int 2021; 32:1795-1801. [PMID: 33616675 DOI: 10.1007/s00198-020-05789-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
UNLABELLED Patients with Paget's disease of bone recruited over the last 20 years by a single centre were evaluated to find possible clinical changes. All markers of severity showed consistent downward trends. A reduced disease incidence could seemingly refer to lower sensitivity of the diagnostic tools owing to lower severity. INTRODUCTION This study aimed to evaluate if the severity of Paget's disease of bone (PDB) is decreasing and whether a milder phenotype can have affected the results of studies on disease prevalence. METHODS From August 2007 to August 2019, 167 patients with PDB were referred to our centre. Demographic and clinical characteristics were collected and compared with those of a sample of 224 patients enrolled in the same setting between January 2000 and July 2007. Multivariate analyses on 391 patients as a whole were performed assuming the year of presentation as explanatory variable. RESULTS Patients of newer sample were diagnosed at a significantly older age (64.0 ± 11.3 vs 61.1 ± 11.6; p = 0.01). By comparing clinical features acknowledged as markers of disease severity, the mean number of involved bones, the proportion of skeletal involvement, and pre-treatment serum alkaline phosphatase (SAP) values all showed significant decreases (p < 0.001) in the more recent sample. Multivariate analyses confirmed these results for the latter two indices. Further markers of disease severity such as the prevalence of monostotic disease and normal SAP at diagnosis showed the same trend. The sensitivity of tools allowing incidental diagnosis in asymptomatic patients showed a reduced sensitivity: -11% for radiological assessments and -33% for SAP. CONCLUSIONS Allowing for referral differences, our study provides information on reduced severity of PDB over the last two decades. A milder phenotype affects the age at onset and impairs the sensitivity of the diagnostic tools contributing to reduce the prevalence of PDB patients incidentally discovered.
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Affiliation(s)
- M Varenna
- Bone Diseases Unit, Department of Rheumatology, Gaetano Pini Institute, Via Pini, 9, 20122, Milan, Italy.
| | - F Zucchi
- Bone Diseases Unit, Department of Rheumatology, Gaetano Pini Institute, Via Pini, 9, 20122, Milan, Italy
| | - C Crotti
- Bone Diseases Unit, Department of Rheumatology, Gaetano Pini Institute, Via Pini, 9, 20122, Milan, Italy
| | - M Manara
- Department of Rheumatology, Gaetano Pini Institute, Milan, Italy
| | - R Caporali
- Department of Rheumatology, Gaetano Pini Institute, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
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6
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Dessay M, Jobin Gervais F, Simonyan D, Samson A, Gleeton G, Gagnon E, Albert C, Brown JP, Michou L. Clinical phenotype of adult offspring carriers of the p.Pro392Leu mutation within the SQSTM1 gene in Paget's disease of bone. Bone Rep 2020; 13:100717. [PMID: 33015249 PMCID: PMC7522747 DOI: 10.1016/j.bonr.2020.100717] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/13/2020] [Accepted: 09/16/2020] [Indexed: 11/30/2022] Open
Abstract
Paget's disease of bone (PDB) is a common chronic bone disorder. In the French-Canadian population, the p.Pro392Leu mutation within the SQSTM1 gene is involved in 46% of familial forms. In New Zealand, the emergence of PDB in offspring inheriting SQSTM1 mutations was reported to be delayed by a decade compared to their parents. We aimed at assessing the clinical phenotype of offspring carriers of this mutation in our French-Canadian cohort. We reviewed research records from adult offspring carriers of this mutation aged <90 years and their affected parents. In parents, we collected data on sex, age at diagnosis, number of affected bones, total serum alkaline phosphatase levels (tALPs) at diagnosis. In offspring, PDB extended phenotype assessment relying on tALPs, bone specific alkaline phosphatase levels (bALPs), procollagen type 1 amino-terminal propeptide (P1NP), whole body bone scan and skull and pelvis radiographs, was performed at inclusion from 1996 to 2009 and updated in 2016 to 2018, if not done during the past 8 years. The results showed that among the 36 offspring with an updated phenotype, four of them developed a clinical phenotype of PDB characterized by monostotic or polyostotic increased bone uptake associated with typical radiographic lesions in the affected sites, representing an incidence of 1.83 per 1000 person-years. Moreover, the age at PDB diagnosis was delayed by at least 10 years in the adult offspring carriers of the p.Pro392Leu mutation versus their affected parents. Our findings support the utility of a regular monitoring of the adult offspring without PDB but carriers of this mutation.
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Affiliation(s)
- Mariam Dessay
- CHU de Québec-Université Laval Research Centre, Quebec, Quebec, Canada
| | | | - David Simonyan
- CHU de Québec-Université Laval Research Centre, Quebec, Quebec, Canada
| | - Andréanne Samson
- CHU de Québec-Université Laval Research Centre, Quebec, Quebec, Canada
| | - Guylaine Gleeton
- CHU de Québec-Université Laval Research Centre, Quebec, Quebec, Canada
| | - Edith Gagnon
- CHU de Québec-Université Laval Research Centre, Quebec, Quebec, Canada
| | | | - Jacques P Brown
- CHU de Québec-Université Laval Research Centre, Quebec, Quebec, Canada.,Department of Medicine, Université Laval, Quebec, Quebec, Canada
| | - Laëtitia Michou
- CHU de Québec-Université Laval Research Centre, Quebec, Quebec, Canada.,Department of Medicine, Université Laval, Quebec, Quebec, Canada.,Department of Rheumatology, CHU de Québec-Université Laval, Quebec, Quebec, Canada
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7
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Cronin O, Subedi D, Forsyth L, Goodman K, Lewis SC, Keerie C, Walker A, Porteous M, Cetnarskyj R, Ranganath LR, Selby PL, Hampson G, Chandra R, Ho S, Tobias JH, Young-Min SA, McKenna MJ, Crowley RK, Fraser WD, Tang J, Gennari L, Nuti R, Brandi ML, Del Pino-Montes J, Devogelaer JP, Durnez A, Isaia GC, Di Stefano M, Rubio JB, Guanabens N, Seibel MJ, Walsh JP, Kotowicz MA, Nicholson GC, Duncan EL, Major G, Horne A, Gilchrist NL, Ralston SH. Characteristics of Early Paget's Disease in SQSTM1 Mutation Carriers: Baseline Analysis of the ZiPP Study Cohort. J Bone Miner Res 2020; 35:1246-1252. [PMID: 32176830 DOI: 10.1002/jbmr.4007] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 02/25/2020] [Accepted: 03/10/2020] [Indexed: 12/26/2022]
Abstract
Mutations in SQSTM1 are strongly associated with Paget's disease of bone (PDB), but little is known about the clinical characteristics of those with early disease. Radionuclide bone scans, biochemical markers of bone turnover, and clinical characteristics were analyzed in SQSTM1 mutation carriers who took part in the Zoledronic acid in the Prevention of Paget's disease (ZiPP) study. We studied 222 individuals, of whom 54.9% were female, with mean ± SE age of 50.1 ± 0.6 years. Twelve SQSTM1 mutations were observed, including p.Pro392Leu, which was present in 141 of 222 (63.5%) subjects. Bone scan examination revealed evidence of PDB in 20 subjects (9.0%), ten of whom (50%) had a single affected site. Participants with lesions were older than those without lesions but the difference was not significant (53.6 ± 9.1 versus 49.8 ± 8.9; p = .07). The mean age of participants with lesions was not significantly different from the age at which their parents were diagnosed with PDB (55 years versus 59 years, p = .17). All individuals with lesions were asymptomatic. Serum concentrations of total alkaline phosphatase (ALP) normalized to the upper limit of normal in each center were higher in those with lesions (0.75 ± 0.69 versus 0.42 ± 0.29 arbitary units; p < .0001). Similar findings were observed for other biochemical markers of bone turnover, but the sensitivity of ALP and other markers in detecting lesions was poor. Asymptomatic PDB is present in about 9% of SQSTM1 mutation carriers by the fifth decade. Further follow-up of this cohort will provide important information on the natural history of early PDB and its response to treatment. © 2020 The Authors. Journal of Bone and Mineral Research published by American Society for Bone and Mineral Research.
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Affiliation(s)
- Owen Cronin
- Rheumatic Diseases Unit, Western General Hospital, Edinburgh, UK
| | - Deepak Subedi
- Department of Radiology and Nuclear Medicine, Western General Hospital, Edinburgh, UK
| | - Laura Forsyth
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Nine Edinburgh Bioquarter, Edinburgh, UK
| | - Kirsteen Goodman
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Nine Edinburgh Bioquarter, Edinburgh, UK
| | - Steff C Lewis
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Nine Edinburgh Bioquarter, Edinburgh, UK
| | - Catriona Keerie
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Nine Edinburgh Bioquarter, Edinburgh, UK
| | - Allan Walker
- Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Nine Edinburgh Bioquarter, Edinburgh, UK
| | - Mary Porteous
- South East Scotland Molecular Genetics Service, Western General Hospital, Edinburgh, UK
| | | | | | - Peter L Selby
- Department of Medicine, Manchester Royal Infirmary, Manchester, UK
| | - Geeta Hampson
- Department of Chemical Pathology and Metabolic Bone Clinic, Department of Rheumatology, Guy's and St. Thomas' Hospital, London, UK
| | - Rama Chandra
- Clinical Biochemistry, King's College Hospital, London, UK
| | - Shu Ho
- The Robert Jones and Agnes Hunt Orthopaedic and District Hospital, Oswestry, UK
| | - Jon H Tobias
- Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | | | - Malachi J McKenna
- Endocrinology Department, St. Vincent's University Hospital, Dublin, Republic of Ireland.,St Vincent's University Hospital and University College Dublin, Dublin, Republic of Ireland
| | - Rachel K Crowley
- Endocrinology Department, St. Vincent's University Hospital, Dublin, Republic of Ireland.,St Vincent's University Hospital and University College Dublin, Dublin, Republic of Ireland
| | - William D Fraser
- Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
| | - Jonathan Tang
- Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
| | - Luigi Gennari
- Department of Medicine, Surgery and Neurosciences, University of Sienna, Sienna, Italy
| | - Rannuccio Nuti
- Department of Medicine, Surgery and Neurosciences, University of Sienna, Sienna, Italy
| | - Maria-Luisa Brandi
- Department of Internal Medicine, University Hospital of Careggi, Florence, Italy
| | | | | | - Anne Durnez
- Clinique Universitaires Saint-Luc, Brussels, Belgium
| | - Giovanni Carlo Isaia
- Geriatrics and Metabolic Bone Diseases, AOU San Giovanni Battista di Torino Corso, Torino, Italy
| | - Marco Di Stefano
- Geriatrics and Metabolic Bone Diseases, AOU San Giovanni Battista di Torino Corso, Torino, Italy
| | | | - Nuria Guanabens
- Department of Rheumatology, Hospital Clinic, CIBERehd, Barcelona, Spain
| | - Markus J Seibel
- Department of Endocrinology and Metabolism, Concord Repatriation General Hospital, Sydney, Australia
| | - John P Walsh
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, Australia.,Medical School, The University of Western Australia, Crawley, Australia
| | - Mark A Kotowicz
- Department of Endocrinology and Diabetes, Deakin University, Geelong, Australia
| | - Geoffrey C Nicholson
- Rural Clinical School Research Centre, Darlin Heights, The University of Queensland, Brisbane, Australia
| | - Emma L Duncan
- Endocrinology Department, Royal Brisbane and Woman's Hospital, Herston, Australia.,Translational Genomics Group, Institute of Health and Biomedical Innovation, Faculty of Health, Queensland University of Technology, Translational Research Institute, Princess Alexandra Hospital, Woolloongabba, Australia.,Faculty of Medicine, University of Queensland, Herston, Australia
| | - Gabor Major
- Rheumatology, Bone and Joint Institute, Royal Newcastle Center, New Lambton Heights, Australia.,University of Newcastle, Callaghan, Australia
| | - Anne Horne
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Nigel L Gilchrist
- The CGM Research Trust, The Princess Margaret Hospital, Christchurch, New Zealand
| | - Stuart H Ralston
- Rheumatic Diseases Unit, Western General Hospital, Edinburgh, UK.,Edinburgh Clinical Trials Unit, Usher Institute, University of Edinburgh, Nine Edinburgh Bioquarter, Edinburgh, UK.,Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital, Edinburgh, UK
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8
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Michou L, Orcel P. Has Paget's bone disease become rare? Joint Bone Spine 2019; 86:538-541. [DOI: 10.1016/j.jbspin.2019.01.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2018] [Indexed: 10/27/2022]
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9
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Abstract
Paget’s disease is a condition which continues to challenge and surprise. The dramatic fall in its incidence over the last three decades has been an enormous surprise, as is the capacity of a single infusion of the potent bisphosphonate, zoledronate, to produce biochemical remission in 90% of patients, remissions which usually persist for many years and raise the possibility of a cure in some patients. However, challenges in its management remain. The trials carried out in Paget’s disease have almost always had biochemical indices as their primary endpoints. From these studies, we also know that bone pain is relieved, quality of life improved, bone histology normalised, and radiological lesions healed. Thus, disease progression is halted. Studies have not been powered to assess whether clinically important endpoints such as fracture and the need for joint replacement surgery are diminished, although these complications are well established as part of the natural history of the condition. Since disease progression is prevented by potent bisphosphonates, it is likely that disease complications will also be prevented. Zoledronate also reduces the frequency of follow-up needed and therefore provides a very cost-effective intervention in those who have symptomatic disease or are at risk of complications.
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Affiliation(s)
- Ian R Reid
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Auckland, 1142, New Zealand.,Auckland District Health Board, Auckland, 1142, New Zealand
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10
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Gennari L, Rendina D, Falchetti A, Merlotti D. Paget's Disease of Bone. Calcif Tissue Int 2019; 104:483-500. [PMID: 30671590 DOI: 10.1007/s00223-019-00522-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Accepted: 12/30/2018] [Indexed: 01/04/2023]
Abstract
Paget's disease of bone (PDB) is a chronic and focal bone disorder, characterized by increased osteoclast-mediated bone resorption and a subsequent compensatory increase in bone formation, resulting in a disorganized mosaic of woven and lamellar bone at one or more affected skeletal sites. As a result, bone pain, noticeable deformities, arthritis at adjacent joints, and fractures can occur. In a small proportion of cases neoplastic degeneration in osteosarcoma, or, less frequently, giant cell tumor has been also described at PDB sites. While recent epidemiological evidences clearly indicate a decrease in the prevalence and the severity of PDB, over the past 2 decades there have been consistent advances on the genetic mechanisms of disease. It is now clear that PDB is a genetically heterogeneous disorder, with mutations in at least two different genes (SQSTM1, ZNF687) and more common predisposing variants. As a counterpart to the genetic hypothesis, the focal nature of lesions, the decline in prevalence rates, and the incomplete penetrance of the disease among family members suggest that one or more environmental triggers may play a role in the pathophysiology of PDB. The exact nature of these triggers and how they might interact with the genetic factors are less understood, but recent experimental data from mice models suggest the implication of paramixoviral infections. The clinical management of PDB has also evolved considerably, with the development of potent aminobisphosphonates such as zoledronic acid which, given as a single intravenous infusion, now allows a long-term disease remission in the majority of patients.
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Affiliation(s)
- Luigi Gennari
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy.
- Policlinico Santa Maria alle Scotte, Viale Bracci, 53100, Siena, Italy.
| | - Domenico Rendina
- Department of Medicine and Surgery, Federico II University, Naples, Italy
| | - Alberto Falchetti
- Centro Hercolani and Villa Alba (GVM), 40123 Bologna and EndOsMet, Villa Donatello Private Hospital, 50132, Florence, Italy
| | - Daniela Merlotti
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Division of Genetics and Cell Biology, San Raffaele Hospital, Milan, Italy
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11
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Daroszewska A, Rose L, Sarsam N, Charlesworth G, Prior A, Rose K, Ralston SH, van 't Hof RJ. Zoledronic acid prevents pagetic-like lesions and accelerated bone loss in the p62 P394L mouse model of Paget's disease. Dis Model Mech 2018; 11:dmm035576. [PMID: 30154079 PMCID: PMC6177010 DOI: 10.1242/dmm.035576] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/02/2018] [Indexed: 11/20/2022] Open
Abstract
Paget's disease of bone (PDB) is an age-related metabolic bone disorder, characterised by focally increased and disorganised bone remodelling initiated by abnormal and hyperactive osteoclasts. The germline P392L mutation of SQSTM1 (encoding p62) is a strong genetic risk factor for PDB in humans, and the equivalent mutation in mice (P394L) causes a PDB-like disorder. However, it is unclear why pagetic lesions become more common with age. Here, we assessed the effect of the p62 P394L mutation on osteoclastogenesis and bone morphometry in relation to ageing, the natural history of lesion progression in p62P394L mice and the effect of zoledronic acid (ZA) on lesion development. p62P394L+/+ osteoclast precursors had increased sensitivity to RANKL (also known as TNFSF11) compared with wild-type (WT) cells, and the sensitivity further increased in both genotypes with ageing. Osteoclastogenesis from 12-month-old p62P394L+/+ mice was twofold greater than that from 3-month-old p62P394L+/+ mice (P<0.001) and three-fold greater than that from age-matched WT littermates. The p62P394L+/+ mice lost 33% more trabecular bone volume in the long bones by 12 months compared with WT mice (P<0.01), and developed pagetic-like lesions in the long bones which progressed with ageing. ZA prevented the development of pagetic-like lesions, and increased trabecular bone volume tenfold compared with vehicle by 12 months of age (P<0.01). This demonstrates that ageing has a pro-osteoclastogenic effect, which is further enhanced by the p62 P394L mutation, providing an explanation for the increased penetrance of bone lesions with age in this model. Lesions are prevented by ZA, providing a rationale for early intervention in humans.
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Affiliation(s)
- Anna Daroszewska
- Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
| | - Lorraine Rose
- Rheumatic Diseases Unit, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - Nadine Sarsam
- Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
| | - Gemma Charlesworth
- Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
| | - Amanda Prior
- Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
| | - Kenneth Rose
- Rheumatic Diseases Unit, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - Stuart H Ralston
- Rheumatic Diseases Unit, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - Robert J van 't Hof
- Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool L7 8TX, UK
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12
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Gennari L, Rendina D, Picchioni T, Bianciardi S, Materozzi M, Nuti R, Merlotti D. Paget’s disease of bone: an update on epidemiology, pathogenesis and pharmacotherapy. Expert Opin Orphan Drugs 2018. [DOI: 10.1080/21678707.2018.1500691] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Luigi Gennari
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Domenico Rendina
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Department of Clinical Medicine and Surgery, Federico II University of Naples, Naples, Italy
| | - Tommaso Picchioni
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Simone Bianciardi
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Maria Materozzi
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Ranuccio Nuti
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Daniela Merlotti
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
- Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
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13
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Abstract
Paget's disease is a chronic focal high turnover bone disorder that is primarily present in middle-aged or older adults. It seems to be restricted to humans and has no clear parallels with other diseases. Although much has been learnt about its pathology and epidemiology, and treatment is now highly effective we still lack a complete understanding of its etiology and biology. This review focusses on the natural history of the disorder, in particular its changing epidemiology, recent discoveries about its genetic basis and current approaches to diagnosis and treatment. While there is strong evidence for genetic predisposition to Paget's disease, there is also compelling evidence that it is becoming less prevalent, the age of patients at presentation is increasing and that the extent of skeletal involvement is diminishing, implying that there is an important, but as yet unidentified, environmental factor in its etiology. Contemporary patients are typically elderly and have few bones involved. Treatment with potent intravenous bisphosphonates provides prolonged remission and many will require only once in a lifetime treatment.
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Affiliation(s)
- Tim Cundy
- Department of Medicine, Faculty of Medical & Health Sciences, University of Auckland, New Zealand.
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14
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Environmental factors associated with familial or non-familial forms of Paget's disease of bone. Joint Bone Spine 2017; 84:719-723. [DOI: 10.1016/j.jbspin.2016.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 11/23/2016] [Indexed: 11/22/2022]
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15
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Britton C, Brown S, Ward L, Rea SL, Ratajczak T, Walsh JP. The Changing Presentation of Paget's Disease of Bone in Australia, A High Prevalence Region. Calcif Tissue Int 2017; 101:564-569. [PMID: 28884211 DOI: 10.1007/s00223-017-0312-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 08/06/2017] [Indexed: 01/24/2023]
Abstract
Studies from several countries suggest that the incidence of Paget's disease of bone (PDB) and the severity of newly diagnosed cases are declining. The aim of this study was to examine secular changes in clinical presentation of PDB in Australia, which historically had the highest prevalence outside the United Kingdom. The participants were 293 patients (61% male) diagnosed between 1956 and 2013 with details recorded in the database of the Paget's Disease Research Group of Western Australia. The mean age at diagnosis was 62 years (range 28-90); 26% of participants had a family history of PDB and 11% had Sequestosome 1 (SQSTM1) mutations. After adjustment for covariates (SQSTM1 mutation status, family history, country of birth, smoking and dog exposure), there was a significant positive relationship between year of diagnosis and age at diagnosis (P < 0.001) and significant negative relationships between year of diagnosis and both pre-treatment total plasma alkaline phosphatase activity (ALP) and number of involved bones (P < 0.001 for each). Patients with SQSTM1 mutations had more extensive disease (P < 0.001) and higher pre-treatment ALP (P = 0.013). In subgroup analyses, relationships between year of diagnosis and each of age at diagnosis, number of involved bones and ALP were similar in patients with sporadic or familial disease, and in patients with and without SQSTM1 mutations. We conclude that the severity of PDB in Western Australia has declined over recent decades. This is likely to reflect altered exposure to one or more environmental agents involved in pathogenesis.
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Affiliation(s)
- Cameron Britton
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, WA, 6009, Australia
| | - Suzanne Brown
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, WA, 6009, Australia
| | - Lynley Ward
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, WA, 6009, Australia
| | - Sarah L Rea
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, WA, 6009, Australia
- Neurogenetic Diseases Laboratory, Harry Perkins Institute of Medical Research, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Thomas Ratajczak
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, WA, 6009, Australia
| | - John P Walsh
- Department of Endocrinology and Diabetes, Sir Charles Gairdner Hospital, Nedlands, WA, 6009, Australia.
- School of Medicine and Pharmacology, The University of Western Australia, Crawley, WA, 6009, Australia.
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16
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Qi X, Pang Q, Wang J, Zhao Z, Wang O, Xu L, Mao J, Jiang Y, Li M, Xing X, Yu W, Asan, Xia W. Familial Early-Onset Paget's Disease of Bone Associated with a Novel hnRNPA2B1 Mutation. Calcif Tissue Int 2017; 101:159-169. [PMID: 28389692 DOI: 10.1007/s00223-017-0269-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 03/20/2017] [Indexed: 12/17/2022]
Abstract
Paget disease of bone (PDB) is a common metabolic bone disease characterized by increased bone resorption and disorganized bone formation which affect single or multiple sites of bones. Although the exact cause of PDB is still controversial, genetic factors are considered to play an important role in PDB. Several genes involved in the differentiation or function of osteoclast were shown to be associated with PDB or related syndrome such as SQSTM1, TNFRSF11A, TNFRSF11B, and ZNF687. Multisystem proteinopathy (MSP), a newly proposed syndrome including inclusion body myopathy (IBM), PDB, frontotemporal dementia (FTD), and amyotrophic lateral sclerosis (ALS), is mainly caused by mutation in VCP gene. In 2013, a new casual gene for MSP was identified as hnRNPA2B1 gene. This may partly account for the inherited PDB traits which is however negative for mutation in already known causative PDB genes. We investigated a Chinese family with multiple affected individuals with PDB, but none of the members showed symptoms of IBM, FTD, or ALS. Three patients were evaluated clinically, biochemically, and radiographically. To screen for the responsible mutation, whole-exome sequencing was conducted in the proband, another patient, as well as a normal individual from the family. This revealed a novel heterozygous missense mutation of hnRNPA2B1 gene (c.929C>T, p. P310L) in the two patients which was then verified in all affected individuals. We describe here a novel missense mutation in hnRNPA2B1 gene in a large pedigree affected with PDB with members who do not present other manifestations of multisystem proteinopathy, such as IBM, FTD, and ALS.
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Affiliation(s)
- Xuan Qi
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Qianqian Pang
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Jiawei Wang
- BGI-Shenzhen, Shenzhen, 518083, China
- Binhai Genomics Institute, BGI-Tianjin, BGI-shenzhen, Tianjin, 300308, China
| | - Zhen Zhao
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Ou Wang
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Lijun Xu
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Jiangfeng Mao
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Yan Jiang
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Mei Li
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Xiaoping Xing
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China
| | - Wei Yu
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Asan
- BGI-Shenzhen, Shenzhen, 518083, China.
- Binhai Genomics Institute, BGI-Tianjin, BGI-shenzhen, Tianjin, 300308, China.
| | - Weibo Xia
- Key Laboratory of Endocrinology, Department of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Shuaifuyuan No. 1, Wangfujing, Dongcheng District, Beijing, 100730, China.
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17
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Abstract
Paget’s disease of bone (PDB) is the second most common metabolic bone disorder, after osteoporosis. It is characterised by focal areas of increased and disorganised bone turnover, coupled with increased bone formation. This disease usually appears in the late stages of life, being slightly more frequent in men than in women. It has been reported worldwide, but primarily affects individuals of British descent. Majority of PDB patients are asymptomatic, but clinical manifestations include pain, bone deformity and complications, like pathological fractures and deafness. The causes of the disease are poorly understood and it is considered as a complex trait, combining genetic predisposition with environmental factors. Linkage analysis identified SQSTM1, at chromosome 5q35, as directly related to the disease. A number of mutations in this gene have been reported, pP392L being the most common variant among different populations. Most of these variants affect the ubiquitin-associated (UBA) domain of the protein, which is involved in autophagy processes. Genome-wide association studies enlarged the number of loci associated with PDB, and further fine-mapping studies, combined with functional analysis, identified OPTN and RIN3 as causal genes for Paget’s disease. A combination of risk alleles identified by genome-wide association studies led to the development of a score to predict disease severity, which could improve the management of the disease. Further studies need to be conducted to elucidate other important aspects of the trait, such as its focal nature and the epidemiological changes found in some populations. In this review, we summarize the clinical characteristics of the disease and the latest genetic advances to identify susceptibility genes. We also list current available treatments and prospective options.
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18
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Michou L, Orcel P. The changing countenance of Paget's Disease of bone. Joint Bone Spine 2016; 83:650-655. [DOI: 10.1016/j.jbspin.2016.02.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/17/2015] [Indexed: 12/31/2022]
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19
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Albagha OME. Genetics of Paget's disease of bone. BONEKEY REPORTS 2015; 4:756. [PMID: 26587225 PMCID: PMC4635861 DOI: 10.1038/bonekey.2015.125] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 09/19/2015] [Indexed: 12/16/2022]
Abstract
Paget's disease of bone (PDB) is a common metabolic bone disease characterised by focal areas of increased bone turnover, which primarily affects people over the age of 55 years. Genetic factors have a fundamental role in the pathogenesis of PDB and are probably the main predisposing factor for the disease. The genetic contribution to PDB susceptibility ranges from rare pathogenic mutations in the single gene SQSTM1 to more common, small effect variants in at least seven genetic loci that predispose to the disease. These loci have additive effects on disease susceptibility and interact with SQSTM1 mutations to affect disease severity, making them a potentially useful tool in predicting disease risk and complication and in managing treatments. Many of these loci harbour genes that have important function in osteoclast differentiation such as CSF1, DCSTAMP and TNFRSF11A. Other susceptibility loci have highlighted new molecular pathways that have not been previously implicated in regulation of bone metabolism such as OPTN, which was recently found to negatively regulate osteoclast differentiation. PDB-susceptibility variants exert their effect either by affecting the protein coding sequence such as variants found in SQSTM1 and RIN3 or by influencing gene expression such as those found in OPTN and DCSTAMP. Epidemiological studies indicate that environmental triggers also have a key role in PDB and interact with genetic factors to influence manifestation and severity of the disease; however, further studies are needed to identify these triggers.
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Affiliation(s)
- Omar ME Albagha
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
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20
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Abstract
Paget's disease of bone is generally diagnosed in individuals aged >50 years, usually manifests in one or several bones and is initiated by osteoclast-induced osteolytic lesions. Subsequently, over a period of many years, osteoblastic activity can result in sclerosis and deformation of bone. The prevalence of Paget's disease is highest in the UK and in countries where a large number of residents have ancestors from the UK. Currently, in many countries, the prevalence of the disorder has decreased. A considerable number of affected patients have a family history of Paget's disease and the disorder has an autosomal dominant pattern of inheritance but with incomplete penetrance. A large number of mutations in SQSTM1 (which encodes sequestosome-1; also known as ubiquitin-binding protein p62) seem to account for the susceptibility to develop Paget's disease in some families; the involvement of other genes is currently under investigation. In addition to a genetic cause, environmental factors have been proposed to have a role in the pathogenesis of Paget's disease. Although most evidence has been presented for measles virus as an aetiologic factor, some studies have not confirmed its involvement. The decreasing incidence of Paget's disease, which could be attributed to measles vaccination along with the measles virus nucleocapsid protein induction of Paget's disease lesions in transgenic mice, supports an aetiologic role of the virus.
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Affiliation(s)
- Frederick R Singer
- John Wayne Cancer Institute, Providence Saint Johns Health Center, 2200 Santa Monica Boulevard, Santa Monica, CA 90404, USA
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21
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Affiliation(s)
- Mahéva Vallet
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh; Western General Hospital; Edinburgh EH4 2XU
| | - Stuart H. Ralston
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh; Western General Hospital; Edinburgh EH4 2XU
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