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Zuo B, Xu H, Pan Z, Mao L, Feng H, Zeng B, Tang W, Lu W. A likely pathogenic POLD1 variant associated with mandibular hypoplasia, deafness, progeroid features, and lipodystrophy syndrome in a Chinese patient. BMC Med Genomics 2022; 15:220. [PMID: 36280868 PMCID: PMC9590123 DOI: 10.1186/s12920-022-01374-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 10/05/2022] [Indexed: 11/10/2022] Open
Abstract
Background Mandibular hypoplasia, deafness, progeroid features, and lipodystrophy syndrome (MDPL; OMIM# 615381) is a rare autosomal dominant disorder, with only a few reported cases worldwide. Herein, we describe the clinical features and underlying molecular etiology of MDPL syndrome in an 8-year-old Chinese patient. Methods We performed otological, endocrine, ultrasound, and radiological examinations, as well as genetic testing. Additionally, the literature concerning MDPL was reviewed to do a retrospective analysis of the pathogenesis, genotype–phenotype correlation, and clinical management. Results The proband was diagnosed with MDPL, presenting with mandibular hypoplasia, a characteristic facial appearance, lipodystrophy, and sensorineural hearing loss (SNHL). Whole-exome sequencing and bioinformatics analysis revealed a de novo missense variant in the POLD1 gene, NM_002691.4:c.3185A>G (NP_002682.2:p.(Gln1062Arg)). The retrospective analysis showed wide variation in the MDPL phenotype, but the most frequent features included mandibular hypoplasia, characteristic facial appearance, lipodystrophy, and SNHL. Conclusions This study supplements the mutational spectrum of POLD1. The genetic analysis contributes to the diagnosis of syndromic deafness, and it has a vital role in clinical management and future genetic consultation.
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Affiliation(s)
- Bin Zuo
- grid.412633.10000 0004 1799 0733Department of Otorhinolaryngology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jian-she Road, Zhengzhou, 450052 China
| | - Hongen Xu
- grid.207374.50000 0001 2189 3846Precision Medicine Center, Academy of Medical Science, Zhengzhou University, No. 40 Daxuebei Road, Zhengzhou, 450052 China ,grid.452842.d0000 0004 8512 7544The Research and Application Center of Precision Medicine, The Second Affiliated Hospital of Zhengzhou University, No. 2 Jing-ba Road, Zhengzhou, 450014 China
| | - Zhaoyu Pan
- grid.412633.10000 0004 1799 0733Department of Otorhinolaryngology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jian-she Road, Zhengzhou, 450052 China
| | - Lu Mao
- grid.207374.50000 0001 2189 3846Precision Medicine Center, Academy of Medical Science, Zhengzhou University, No. 40 Daxuebei Road, Zhengzhou, 450052 China
| | - Haifeng Feng
- grid.412633.10000 0004 1799 0733Department of Otorhinolaryngology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jian-she Road, Zhengzhou, 450052 China
| | - Beiping Zeng
- grid.207374.50000 0001 2189 3846Precision Medicine Center, Academy of Medical Science, Zhengzhou University, No. 40 Daxuebei Road, Zhengzhou, 450052 China
| | - Wenxue Tang
- grid.452842.d0000 0004 8512 7544The Research and Application Center of Precision Medicine, The Second Affiliated Hospital of Zhengzhou University, No. 2 Jing-ba Road, Zhengzhou, 450014 China ,grid.207374.50000 0001 2189 3846Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, No. 40 Daxuebei Road, Zhengzhou, 450052 China
| | - Wei Lu
- grid.412633.10000 0004 1799 0733Department of Otorhinolaryngology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jian-she Road, Zhengzhou, 450052 China
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Generalized lipoatrophy syndromes. Presse Med 2021; 50:104075. [PMID: 34562560 DOI: 10.1016/j.lpm.2021.104075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 08/31/2021] [Accepted: 09/15/2021] [Indexed: 11/23/2022] Open
Abstract
Generalized lipodystrophy (GL) syndromes are a group of rare heterogenous disorders, characterized by total subcutaneous fat loss. The frequency of GL is currently assessed as approximately 0,23 cases per million of the population, in Europe - as 0,96 cases per million of the population. They can be congenital (CGL) or acquired (AGL) depending on the etiology and the time of the onset of fat loss. Both CGL and AGL are often associated with different metabolic complications, such as hypertriglyceridemia, insulin resistance and lipoatrophic diabetes mellitus, metabolically associated FLD, arterial hypertension, proteinuria, reproductive system disorders. In this review we aimed to summarize the information on all forms of generalized lipodystrophy, especially the ones of genetic etiology, their clinical manifestations and complications, the perspectives for diagnostics, treatment and further research.
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Gladys B, René W, Anabelle D, Ahmad M, Caroline F, Etienne S, Deniz K, Valerie B, Anick C, Jean-Paul M, Benoît M, Philippe K, Isabelle M. Child to adulthood clinical description of MDPL syndrome due to a novel variant in POLD1. Eur J Med Genet 2021; 64:104333. [PMID: 34517090 DOI: 10.1016/j.ejmg.2021.104333] [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: 03/02/2021] [Revised: 08/12/2021] [Accepted: 09/02/2021] [Indexed: 11/16/2022]
Abstract
Mandibular hypoplasia, Deafness, Progeroid features, and Lipodystrophy (MDPL) syndrome is a rare autosomal dominant disorder caused by mutations in POLD1 gene and characterized by mandibular hypoplasia, deafness, progeroid features and lipodystrophy. One recurrent mutation p.(Ser605del) was reported in almost all affected patients. We report a novel de novo c.3214A>C p.(Thr1072Pro) variant in POLD1 in a 28-year-old male with MDPL syndrome. We provide a clinical description, molecular/immunohistological results, and literature review.
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Affiliation(s)
- Battisti Gladys
- Centre for Human Genetics, Institut de Pathologie et de Génétique, Charleroi, Gosselies, Belgium
| | - Wintjens René
- Laboratory of Microbiology, Bioorganic and Macromolecular Chemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Decottignies Anabelle
- Telomeres Research Group, Genetic & Epigenetic Alterations of Genomes, de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Merhi Ahmad
- IPG BioBank and Laboratory of Translational Oncology, Institut de Pathologie et de Génétique/Grand Hôpital de Charleroi, Gosselies, Belgium
| | - Fervaille Caroline
- Department of Anatomopathology, Cliniques de Mont-Godinne, CHU-UCL-Namur, Godinne, Belgium
| | - Sokal Etienne
- UCLouvain, Cliniques Universitaires St Luc, Service de Gastroentérologie et Hépatologie Pédiatrique, 10 Av Hippocrate, Bruxelles, Belgium
| | - Karadurmus Deniz
- Centre for Human Genetics, Institut de Pathologie et de Génétique, Charleroi, Gosselies, Belgium
| | - Benoit Valerie
- Centre for Human Genetics, Institut de Pathologie et de Génétique, Charleroi, Gosselies, Belgium
| | - Claessens Anick
- Department of Endocrinology, Vivalia, Cliniques Sud Luxembourg, Arlon, Belgium
| | - Martinet Jean-Paul
- Department of Hepato-Gastro-Enterology, Cliniques de Mont-Godinne, CHU-UCL-Namur, Godinne, Belgium
| | - Martiat Benoît
- Department of Oto-Rhino-Laryngology, Vivalia, Cliniques Sud Luxembourg, Arlon, Belgium
| | - Kinzinger Philippe
- Department of Orthopedic Surgery, Vivalia, Cliniques Sud Luxembourg, Arlon, Belgium
| | - Maystadt Isabelle
- Centre for Human Genetics, Institut de Pathologie et de Génétique, Charleroi, Gosselies, Belgium; Faculty of Medicine, Unamur, Namur, Belgium.
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Coppedè F. Mutations Involved in Premature-Ageing Syndromes. APPLICATION OF CLINICAL GENETICS 2021; 14:279-295. [PMID: 34103969 PMCID: PMC8180271 DOI: 10.2147/tacg.s273525] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/17/2021] [Indexed: 12/12/2022]
Abstract
Premature-ageing syndromes are a heterogeneous group of rare genetic disorders resembling features of accelerated ageing and resulting from mutations in genes coding for proteins required for nuclear lamina architecture, DNA repair and maintenance of genome stability, mitochondrial function and other cellular processes. Hutchinson–Gilford progeria syndrome (HGPS) and Werner syndrome (WS) are two of the best-characterized progeroid syndromes referred to as childhood- and adulthood-progeria, respectively. This article provides an updated overview of the mutations leading to HGPS, WS, and to the spectrum of premature-ageing laminopathies ranging in severity from congenital restrictive dermopathy (RD) to adult-onset atypical WS, including RD-like laminopathies, typical and atypical HGPS, more and less severe forms of mandibuloacral dysplasia (MAD), Néstor-Guillermo progeria syndrome (NGPS), atypical WS, and atypical progeroid syndromes resembling features of HGPS and/or MAD but resulting from impaired DNA repair or mitochondrial functions, including mandibular hypoplasia, deafness, progeroid features, and lipodystrophy (MDPL) syndrome and mandibuloacral dysplasia associated to MTX2 (MADaM). The overlapping signs and symptoms among different premature-ageing syndromes, resulting from both a large genetic heterogeneity and shared pathological pathways underlying these conditions, require an expert clinical evaluation in specialized centers paralleled by next-generation sequencing of panels of genes involved in these disorders in order to establish as early as possible an accurate clinical and molecular diagnosis for a proper patient management.
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Affiliation(s)
- Fabio Coppedè
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa, Italy
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Zhou L, Lv Z, Tian X, Zhang Y, Xu Z. Eye pain and blurred vision as main complaints in a new case with MDPL syndrome. Eur J Ophthalmol 2021; 32:NP82-NP86. [PMID: 33863234 DOI: 10.1177/11206721211009179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION We report a novel phenotype of mandibular hypoplasia, deafness, and progeroid features with lipodystrophy (MDPL) syndrome with POLD1 mutation in a Chinese girl. CASE DESCRIPTION Diabetic retinopathy was detected as the primary manifestation in a Chinese girl with MDPL syndrome carrying a known POLD1 mutation (c.1812_1814delCTC, p.Ser605del). Typical characteristics of the syndrome including mandibular hypoplasia, deafness, progeroid features, and diabetes were detected after comprehensive examinations. The patient suffered from blurred vision and eye pain due to the neovascularization of the retina (vitreous hemorrhage and retinal detachment) and iris (neovascular glaucoma). The literature review revealed that the prevalence of hepatomegaly and abnormal triglyceride levels were significantly higher in female than in male with MDPL syndrome carrying POLD1 mutations. CONCLUSION These results expand our knowledge regarding the clinical phenotypes of MDPL syndrome with POLD1 mutations. Diabetic retinopathy is a non-negligible complication of MDPL syndrome. The phenotype varies among female and male patients with the syndrome. Hepatomegaly and abnormal triglyceride levels are more common in female patients with MDPL syndrome.
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Affiliation(s)
- Lin Zhou
- Department of ophthalmology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Zhiqing Lv
- Department of ophthalmology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xuelian Tian
- Department of ophthalmology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yi Zhang
- Department of ophthalmology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Zhuping Xu
- Department of ophthalmology, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Schmit M, Bielinsky AK. Congenital Diseases of DNA Replication: Clinical Phenotypes and Molecular Mechanisms. Int J Mol Sci 2021; 22:E911. [PMID: 33477564 PMCID: PMC7831139 DOI: 10.3390/ijms22020911] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 12/19/2022] Open
Abstract
Deoxyribonucleic acid (DNA) replication can be divided into three major steps: initiation, elongation and termination. Each time a human cell divides, these steps must be reiteratively carried out. Disruption of DNA replication can lead to genomic instability, with the accumulation of point mutations or larger chromosomal anomalies such as rearrangements. While cancer is the most common class of disease associated with genomic instability, several congenital diseases with dysfunctional DNA replication give rise to similar DNA alterations. In this review, we discuss all congenital diseases that arise from pathogenic variants in essential replication genes across the spectrum of aberrant replisome assembly, origin activation and DNA synthesis. For each of these conditions, we describe their clinical phenotypes as well as molecular studies aimed at determining the functional mechanisms of disease, including the assessment of genomic stability. By comparing and contrasting these diseases, we hope to illuminate how the disruption of DNA replication at distinct steps affects human health in a surprisingly cell-type-specific manner.
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Affiliation(s)
| | - Anja-Katrin Bielinsky
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA;
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Yu PT, Luk HM, Mok MT, Lo FI. Evolving clinical manifestations of mandibular hypoplasia, deafness, progeroid features, and lipodystrophy syndrome: From infancy to adulthood in a 31-year-old woman. Am J Med Genet A 2020; 185:995-998. [PMID: 33369179 DOI: 10.1002/ajmg.a.62035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/02/2020] [Accepted: 12/13/2020] [Indexed: 01/30/2023]
Abstract
Mandibular hypoplasia, deafness, progeroid feature, and lipodystrophy syndrome (MDPL, MIM# 615381) is an extremely rare and recently recognized early adult onset of progeroid syndrome, with features of generalized lipodystrophy, dysmorphic features, telangiectasia, early onset hearing loss, insulin resistance, and dyslipidemia. Here, we present a 31-year-old Chinese woman with MDPL, harboring the recurrent pathogenic variant p.(Ser605del) in POLD1, illustrating the evolving manifestations of this premature aging disorder from infancy to adulthood.
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Affiliation(s)
- Pui Tak Yu
- Department of Health, Clinical Genetic Service, Kowloon, Hong Kong
| | - Ho-Ming Luk
- Department of Health, Clinical Genetic Service, Kowloon, Hong Kong
| | - Myth T Mok
- Department of Health, Clinical Genetic Service, Kowloon, Hong Kong
| | - Fm Ivan Lo
- Department of Health, Clinical Genetic Service, Kowloon, Hong Kong
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