1
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Schaflinger E, Blatterer J, Khan AS, Kaufmann L, Auinger L, Tatrai B, Abbasi SW, Zeeshan Ali M, Abbasi AA, Al Kaissi A, Petek E, Wagner K, Ahmad Khan M, Windpassinger C. An exceptional biallelic N-terminal frame shift mutation in ZMPSTE24 leads to non-lethal progeria due to possible utilization of a downstream alternative start codon. Gene 2022; 833:146582. [PMID: 35597529 DOI: 10.1016/j.gene.2022.146582] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 03/29/2022] [Accepted: 05/16/2022] [Indexed: 11/16/2022]
Abstract
Biallelic mutations in ZMPSTE24 are known to be associated with autosomal recessive mandibuloacral dysplasia with type B lipodystrophy (MADB) and lethal restrictive dermopathy (RD), respectively. Disease manifestation is depending on the remaining enzyme activity of the mutated ZMPSTE24 protein. To date, complete loss of function has exclusively been reported in RD cases. In this study, we identified a novel N-terminal homozygous frameshift mutation (c.28_29insA) in a consanguineous family segregating with MADB. An in-depth analysis of the mutated sequence revealed, that the one base pair insertion creates a novel downstream in-frame start codon, which supposedly serves as an alternative translation initiation site (TIS). This possible rescue mechanism would explain the relatively mild clinical outcome in the studied individuals. Our findings demonstrate the necessity for careful interpretation of N-terminal variants potentially effecting translation initiation.
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Affiliation(s)
- Erich Schaflinger
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria
| | - Jasmin Blatterer
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria
| | - Aiman Saeed Khan
- Gomal Centre of Biochemistry and Biotechnology, Gomal University, D.I.Khan, Khyber Pakhtunkhwa, Pakistan
| | - Lukas Kaufmann
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria
| | - Lisa Auinger
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria
| | - Benjamin Tatrai
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria
| | - Sumra Wajid Abbasi
- NUMS Department of Biological Sciences, National University of Medical Sciences, The Mall, Abid Majeed Road, Rawalpindi, Punjab, Pakistan
| | - Muhammad Zeeshan Ali
- Gomal Centre of Biochemistry and Biotechnology, Gomal University, D.I.Khan, Khyber Pakhtunkhwa, Pakistan
| | - Ansar Ahmad Abbasi
- Department of Zoology, Mirpur University of Science and Technology, Mirpur, AJK 10250, Pakistan
| | - Ali Al Kaissi
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of OEGK and AUVA Trauma Centre Meidling, 1st Med. Dept. Hanusch Hospital, Vienna, Austria
| | - Erwin Petek
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria
| | - Klaus Wagner
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria
| | - Muzammil Ahmad Khan
- Gomal Centre of Biochemistry and Biotechnology, Gomal University, D.I.Khan, Khyber Pakhtunkhwa, Pakistan.
| | - Christian Windpassinger
- Diagnostic and Research Institute of Human Genetics, Medical University of Graz, Graz 8010, Austria.
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2
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Pradeep I, Gowrishankar K, Shanmugasundaram L. Lethal Restrictive Dermopathy with ZMPSTE24 Mutation. Pediatr Dev Pathol 2022; 25:327-329. [PMID: 34961372 DOI: 10.1177/10935266211065316] [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] [Indexed: 11/16/2022]
Abstract
Lethal restrictive dermopathy is genodermatoses associated with lamin protein defects resulting in connective tissue abnormalities of skin, musculoskeletal, and adipose tissue. We report one such case with a mutation in the ZMPSTE24 gene which is involved in lamin protein synthesis, resulting in fetal akinesia or hypokinesia deformation sequence. Early recognition in the perinatal period of distinctive clinical and skin histological features followed by molecular diagnosis enabled genetic counseling for the affected family.
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Affiliation(s)
- Immanuel Pradeep
- Department of Pathology and Laboratory Medicine, 596687A.I.I.M.S Bibinagar, Hyderabad, India
| | - Kalpana Gowrishankar
- Department of Medical Genetics, 29981Kanchi Kamakoti Childs Trust Hospital, Chennai, India
| | - Lakshmi Shanmugasundaram
- Department of Obstetrics and Gynaecology, Institute of Reproductive Medicine, 29848Madras Medical Mission, Chennai, India
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3
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Scott JB, Yanes AF, Vivar KL, Yun D, Wagner A, Kruse L, Mancini AJ. Restrictive dermopathy: Three new patients with ZMPSTE24 mutations and a review of the literature. Pediatr Dermatol 2021; 38:1535-1540. [PMID: 34647350 DOI: 10.1111/pde.14822] [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] [Indexed: 11/30/2022]
Abstract
Restrictive dermopathy (RD) is a rare and lethal laminopathy caused by mutations in LMNA or ZMPSTE24. This series reports 3 patients with RD and reviews the literature of the 113 previously reported cases, including highlights of the unique constellation of clinical findings in RD, as well as histologic, radiographic, and genetic features. Early recognition of these characteristic features is vital to establish a prompt diagnosis and provide adequate family counseling for this terminal condition.
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Affiliation(s)
- Jennifer B Scott
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Arianna F Yanes
- Department of Dermatology, University of Pennsylvania, Philadelphia, PA, USA
| | - Karina L Vivar
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Dermatology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Duri Yun
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Dermatology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Annette Wagner
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Dermatology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Lacey Kruse
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Dermatology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Anthony J Mancini
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Division of Dermatology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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Diociaiuti A, D'Amico P, Pisaneschi E, Giancristoforo S, Pappalardo MG, Di Guardo V, Zambruno G, El Hachem M. Teledermatology diagnosis of the first Italian patient affected with restrictive dermopathy due to ZMPSTE24 homozygous mutation. J Eur Acad Dermatol Venereol 2018; 33:e139-e140. [PMID: 30461078 DOI: 10.1111/jdv.15351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A Diociaiuti
- Dermatology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - P D'Amico
- Neonatology and NICU, Cannizzaro Hospital, Catania, Italy
| | - E Pisaneschi
- Medical Genetics Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - S Giancristoforo
- Dermatology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - M G Pappalardo
- Neonatology and NICU, Cannizzaro Hospital, Catania, Italy
| | - V Di Guardo
- Neonatology and NICU, Cannizzaro Hospital, Catania, Italy
| | - G Zambruno
- Istituto Dermopatico dell'Immacolata, IRCCS, Rome, Italy
| | - M El Hachem
- Dermatology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
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5
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Cassini TA, Robertson AK, Bican AG, Cogan JD, Hannig VL, Newman JH, Hamid R, Phillips JA. Phenotypic heterogeneity of ZMPSTE24 deficiency. Am J Med Genet A 2018; 176:1175-1179. [PMID: 29341437 DOI: 10.1002/ajmg.a.38493] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 08/18/2017] [Accepted: 08/23/2017] [Indexed: 01/01/2023]
Abstract
A 4-year-old girl was referred to the Undiagnosed Diseases Network with a history of short stature, thin and translucent skin, macrocephaly, small hands, and camptodactyly. She had been diagnosed with possible Hallerman-Streiff syndrome. Her evaluation showed that she was mosaic for uniparental isodisomy of chromosome 1, which harbored a pathogenic c.1077dupT variant in ZMPSTE24 which predicts p.(Leu362fsX18). ZMPSTE24 is a zinc metalloproteinase that is involved in processing farnesylated proteins and pathogenic ZMPSTE24 variants cause accumulation of abnormal farnesylated forms of prelamin A. This, in turn, causes a spectrum of disease severity which is based on enzyme activity. The current patient has an intermediate form, which is a genocopy of severe Progeria.
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Affiliation(s)
- Thomas A Cassini
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee.,Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Amy K Robertson
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Anna G Bican
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Joy D Cogan
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Vickie L Hannig
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - John H Newman
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Rizwan Hamid
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - John A Phillips
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
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6
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Chang Liao NF, Chee SY, Wang CH, Lin TY, Hsu CJ. Restrictive dermopathy in a Taiwanese newborn. DERMATOL SIN 2016. [DOI: 10.1016/j.dsi.2015.10.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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7
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Distal acroosteolysis, poikiloderma and joint stiffness: a novel laminopathy? Eur J Hum Genet 2016; 24:1220-2. [PMID: 26733286 DOI: 10.1038/ejhg.2015.265] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 10/08/2015] [Accepted: 11/09/2015] [Indexed: 12/11/2022] Open
Abstract
LMNA encodes lamin A and lamin C, two major components of the nuclear lamina, and its pathogenic variants lead to a dozen distinct clinical entities collectively known as laminopathies. Most LMNA-related laminopathies are autosomal dominant but four are autosomal recessive; furthermore, some of the dominant variants have been associated with distinct phenotypes when inherited recessively, further complicating the ability to correlate genotype with phenotype. We report a consanguineous family in which the index presented with an apparently unique constellation of poikiloderma, joint motion restriction and distal acroosteolysis but lacks features of muscle weakness, lipodystrophy, or cardiac or craniofacial involvement. Molecular analysis revealed the presence of a novel homozygous LMNA missense variant (NM_170707.3:c.1774G>A; p.(Gly592Arg)) within an area of autozygome that is not shared by his unaffected siblings. The proposed causal link is further supported by in silico analysis of this variant. Our case suggests an expansion of LMNA allelic disorders to include distal acroosteolysis, poikiloderma and joint stiffness (DAPJ).
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8
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New ZMPSTE24 (FACE1) mutations in patients affected with restrictive dermopathy or related progeroid syndromes and mutation update. Eur J Hum Genet 2013; 22:1002-11. [PMID: 24169522 DOI: 10.1038/ejhg.2013.258] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 09/20/2013] [Accepted: 09/27/2013] [Indexed: 01/24/2023] Open
Abstract
Restrictive dermopathy (RD) is a rare and extremely severe congenital genodermatosis, characterized by a tight rigid skin with erosions at flexure sites, multiple joint contractures, low bone density and pulmonary insufficiency generally leading to death in the perinatal period. RD is caused in most patients by compound heterozygous or homozygous ZMPSTE24 null mutations. This gene encodes a metalloprotease specifically involved in lamin A post-translational processing. Here, we report a total of 16 families for whom diagnosis and molecular defects were clearly established. Among them, we report seven new ZMPSTE24 mutations, identified in classical RD or Mandibulo-acral dysplasia (MAD) affected patients. We also report nine families with one or two affected children carrying the common, homozygous thymine insertion in exon 9 and demonstrate the lack of a founder effect. In addition, we describe several new ZMPSTE24 variants identified in unaffected controls or in patients affected with non-classical progeroid syndromes. In addition, this mutation update includes a comprehensive search of the literature on previously described ZMPSTE24 mutations and associated phenotypes. Our comprehensive analysis of the molecular pathology supported the general rule: complete loss-of-function of ZMPSTE24 leads to RD, whereas other less severe phenotypes are associated with at least one haploinsufficient allele.
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9
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Chong JX, Ouwenga R, Anderson RL, Waggoner DJ, Ober C. A population-based study of autosomal-recessive disease-causing mutations in a founder population. Am J Hum Genet 2012; 91:608-20. [PMID: 22981120 DOI: 10.1016/j.ajhg.2012.08.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 06/12/2012] [Accepted: 08/09/2012] [Indexed: 01/18/2023] Open
Abstract
The decreasing cost of whole-genome and whole-exome sequencing has resulted in a renaissance for identifying Mendelian disease mutations, and for the first time it is possible to survey the distribution and characteristics of these mutations in large population samples. We conducted carrier screening for all autosomal-recessive (AR) mutations known to be present in members of a founder population and revealed surprisingly high carrier frequencies for many of these mutations. By utilizing the rich demographic, genetic, and phenotypic data available on these subjects and simulations in the exact pedigree that these individuals belong to, we show that the majority of mutations were most likely introduced into the population by a single founder and then drifted to the high carrier frequencies observed. We further show that although there is an increased incidence of AR diseases overall, the mean carrier burden is likely to be lower in the Hutterites than in the general population. Finally, on the basis of simulations, we predict the presence of 30 or more undiscovered recessive mutations among these subjects, and this would at least double the number of AR diseases that have been reported in this isolated population.
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Affiliation(s)
- Jessica X Chong
- Department of Human Genetics, University of Chicago, Chicago, IL 60637, USA.
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10
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Kim JY, Kim SH, Ji HY, Choi SJ, Oh SY, Ki CS, Roh CR, Kim JH. A case of restrictive dermopathy with novel ZMPSTE24 gene mutation. Pediatr Dev Pathol 2012; 15:393-6. [PMID: 22746836 DOI: 10.2350/11-07-1059-cr.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Fetal restrictive dermopathy (RD) is a rare lethal condition and should be distinguished from other syndromes characterized by fetal akinesia deformation sequence. Fetal RD shows nonspecific ultrasonographic findings, including polyhydramnios, premature rupture of membrane, and fetal growth restriction. Recently, LMNA and ZMPSTE24 were identified as causative genes offering an opportunity for prenatal genetic diagnosis. We describe a premature newborn boy who presented with rigid skin and typical facial findings. The clinical and histologic diagnosis was confirmed as RD. Molecular genetic analysis revealed a compound heterozygous mutation of the ZMPSTE24 gene.
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Affiliation(s)
- Ji-Young Kim
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
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11
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Barrowman J, Wiley PA, Hudon-Miller SE, Hrycyna CA, Michaelis S. Human ZMPSTE24 disease mutations: residual proteolytic activity correlates with disease severity. Hum Mol Genet 2012; 21:4084-93. [PMID: 22718200 DOI: 10.1093/hmg/dds233] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The zinc metalloprotease ZMPSTE24 plays a critical role in nuclear lamin biology by cleaving the prenylated and carboxylmethylated 15-amino acid tail from the C-terminus of prelamin A to yield mature lamin A. A defect in this proteolytic event, caused by a mutation in the lamin A gene (LMNA) that eliminates the ZMPSTE24 cleavage site, underlies the premature aging disease Hutchinson-Gilford Progeria Syndrome (HGPS). Likewise, mutations in the ZMPSTE24 gene that result in decreased enzyme function cause a spectrum of diseases that share certain features of premature aging. Twenty human ZMPSTE24 alleles have been identified that are associated with three disease categories of increasing severity: mandibuloacral dysplasia type B (MAD-B), severe progeria (atypical 'HGPS') and restrictive dermopathy (RD). To determine whether a correlation exists between decreasing ZMPSTE24 protease activity and increasing disease severity, we expressed mutant alleles of ZMPSTE24 in yeast and optimized in vivo yeast mating assays to directly compare the activity of alleles associated with each disease category. We also measured the activity of yeast crude membranes containing the ZMPSTE24 mutant proteins in vitro. We determined that, in general, the residual activity of ZMPSTE24 patient alleles correlates with disease severity. Complete loss-of-function alleles are associated with RD, whereas retention of partial, measureable activity results in MAD-B or severe progeria. Importantly, our assays can discriminate small differences in activity among the mutants, confirming that the methods presented here will be useful for characterizing any new ZMPSTE24 mutations that are discovered.
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Affiliation(s)
- Jemima Barrowman
- Department of Cell Biology, The Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
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12
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Loucks C, Parboosingh JS, Chong JX, Ober C, Siu VM, Hegele RA, Rupar CA, McLeod DR, Pinto A, Chudley AE, Innes AM. A shared founder mutation underlies restrictive dermopathy in Old Colony (Dutch-German) Mennonite and Hutterite patients in North America. Am J Med Genet A 2012; 158A:1229-32. [PMID: 22495976 DOI: 10.1002/ajmg.a.35302] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Accepted: 01/01/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Catrina Loucks
- Department of Medical Genetics, Alberta Children's Hospital and Alberta Children's Hospital Research Institute for Child and Maternal Health, University of Calgary, Calgary, Alberta, Canada
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13
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Ahmad Z, Zackai E, Medne L, Garg A. Early onset mandibuloacral dysplasia due to compound heterozygous mutations in ZMPSTE24. Am J Med Genet A 2011; 152A:2703-10. [PMID: 20814950 DOI: 10.1002/ajmg.a.33664] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Mandibuloacral dysplasia (MAD) is an autosomal recessive disorder characterized by hypoplasia of the mandible and clavicles, acro-osteolysis, and lipodystrophy due to mutations in LMNA or ZMPSTE24. Only six MAD patients are reported so far with ZMPSTE24 mutations and limited phenotypic data are available for them. Here, we report on two brothers (4 years and 9-month old) with early onset MAD due to ZMPSTE24 mutations in whom thin skin was noted as early as 5 months of age. Both had micrognathia, mottled hyperpigmentation, and enlarged fontanelles but little evidence of lipodystrophy. There was no delay of mental development. The older brother had small pinched nose, short clavicles, acro-osteolysis, stunted growth, joint stiffness, and repeated fractures. There was no evidence of renal disease. Both patients were compound heterozygotes harboring a previously reported missense ZMPSTE24 mutation, p.Pro248Leu, and a novel null mutation, p.Trp450stop. These patients and the review of literature reveal that compared to MAD patients with LMNA mutations, those with ZMPSTE24 mutations develop manifestations earlier in life. Other distinguishing features in MAD due to ZMPSTE24 mutations may include premature birth, renal disease, calcified skin nodules, and lack of acanthosis nigricans. We conclude that in patients with MAD due to ZMPSTE24 mutations, the onset of disease manifestations such as thin skin and micrognathia occurs as early as 5 months of age. In these patients, skeletal phenotype presents earlier whereas lipodystrophy and renal disease may occur later in life.
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Affiliation(s)
- Zahid Ahmad
- Center for Human Nutrition, Division of Nutrition and Metabolic Diseases, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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14
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Ben Yaou R, Navarro C, Quijano-Roy S, Bertrand AT, Massart C, De Sandre-Giovannoli A, Cadiñanos J, Mamchaoui K, Butler-Browne G, Estournet B, Richard P, Barois A, Lévy N, Bonne G. Type B mandibuloacral dysplasia with congenital myopathy due to homozygous ZMPSTE24 missense mutation. Eur J Hum Genet 2011; 19:647-54. [PMID: 21267004 DOI: 10.1038/ejhg.2010.256] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Mutation in ZMPSTE24 gene, encoding a major metalloprotease, leads to defective prelamin A processing and causes type B mandibuloacral dysplasia, as well as the lethal neonatal restrictive dermopathy syndrome. Phenotype severity is correlated with the residual enzyme activity of ZMPSTE24 and accumulation of prelamin A. We had previously demonstrated that a complete loss of function in ZMPSTE24 was lethal in the neonatal period, whereas compound heterozygous mutations including one PTC and one missense mutation were associated with type B mandibuloacral dysplasia. In this study, we report a 30-year longitudinal clinical survey of a patient harboring a novel severe and complex phenotype, combining an early-onset progeroid syndrome and a congenital myopathy with fiber-type disproportion. A unique homozygous missense ZMPSTE24 mutation (c.281T>C, p.Leu94Pro) was identified and predicted to produce two possible ZMPSTE24 conformations, leading to a partial loss of function. Western blot analysis revealed a major reduction of ZMPSTE24, together with the presence of unprocessed prelamin A and decreased levels of lamin A, in the patient's primary skin fibroblasts. These cells exhibited significant reductions in lifespan associated with major abnormalities of the nuclear shape and structure. This is the first report of MAD presenting with confirmed myopathic abnormalities associated with ZMPSTE24 defects, extending the clinical spectrum of ZMPSTE24 gene mutations. Moreover, our results suggest that defective prelamin A processing affects muscle regeneration and development, thus providing new insights into the disease mechanism of prelamin A-defective associated syndromes in general.
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15
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Ahmad Z, Phadke SR, Arch E, Glass J, Agarwal AK, Garg A. Homozygous null mutations in ZMPSTE24 in restrictive dermopathy: evidence of genetic heterogeneity. Clin Genet 2010; 81:158-64. [PMID: 21108632 DOI: 10.1111/j.1399-0004.2010.01580.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Restrictive dermopathy (RD) results in stillbirth or early neonatal death. RD is characterized by prematurity, intrauterine growth retardation, fixed facial expression, micrognathia, mouth in the 'o' position, rigid and tense skin with erosions and denudations and multiple joint contractures. Nearly all 25 previously reported neonates with RD had homozygous or compound heterozygous null mutations in the ZMPSTE24 gene. Here, we report three new cases of RD; all died within 3 weeks of birth. One of them had a previously reported homozygous c.1085dupT (p.Leu362PhefsX19) mutation, the second case had a novel homozygous c.1020G>A (p.Trp340X) null mutation in ZMPSTE24, but the third case, a stillborn with features of RD except for the presence of tapering rather than rounded, bulbous digits, harbored no disease-causing mutations in LMNA or ZMPSTE24. In the newborn with a novel ZMPSTE24 mutation, unique features included butterfly-shaped thoracic 5 vertebra and the bulbous appearance of the distal clavicles. Skin biopsies from both the stillborn fetus and the newborn with c.1020G>A ZMPSTE24 mutation showed absence of elastic fibers throughout the dermis. This report provides evidence of genetic heterogeneity among RD and concludes that there may be an additional locus for RD which remains to be identified.
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Affiliation(s)
- Z Ahmad
- Division of Nutrition and Metabolic Diseases, Department of Internal Medicine, Center for Human Nutrition, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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16
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Li C. Homozygosity for the common mutation c.1085dupT in the ZMPSTE24 gene in a Mennonite baby with restrictive dermopathy and placenta abruption. Am J Med Genet A 2010; 152A:262-3. [PMID: 20034068 DOI: 10.1002/ajmg.a.33163] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Smigiel R, Jakubiak A, Esteves-Vieira V, Szela K, Halon A, Jurek T, Lévy N, De Sandre-Giovannoli A. Novel frameshifting mutations of the ZMPSTE24 gene in two siblings affected with restrictive dermopathy and review of the mutations described in the literature. Am J Med Genet A 2010; 152A:447-52. [PMID: 20101687 DOI: 10.1002/ajmg.a.33221] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Restrictive dermopathy (RD) is a rare, severe, lethal genodermatosis in which tautness of the skin causes fetal akinesia or hypokinesia deformation sequence. To date, about 60 cases of RD were described. The signs of the disease are very characteristic and include intrauterine growth retardation, thin, tightly adherent translucent skin, superficial vessels, typical facial dysmorphism as well as generalized joint contractures. The syndrome is caused in most cases by ZMPSTE24 autosomal recessive mutations, or, less frequently, by LMNA autosomal dominant mutations. We report on two brothers affected with RD, who died in the neonatal period. Molecular analyses were performed in the second child, for whom biological material was available, and both parents. Compound heterozygous frameshifting mutations were identified in exon 1 (c.50delA) and exon 5 (c.584_585delAT) of the ZMPSTE24 gene. The autosomal recessive inheritance was confirmed by the parents' genomic analysis. Besides, a review of the mutations causing RD is made.
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Affiliation(s)
- Robert Smigiel
- Genetics Department, Wroclaw Medical University, Wroclaw, Poland.
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