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Maden Bedel F, Balasar Ö, Erol Aytekin S, Keleş S, Çaksen H. Lenz-Majewski syndrome and recurrent otitis media: Are they related or not? Eur J Med Genet 2024; 68:104910. [PMID: 38262577 DOI: 10.1016/j.ejmg.2024.104910] [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: 08/31/2022] [Revised: 09/07/2023] [Accepted: 01/12/2024] [Indexed: 01/25/2024]
Abstract
Lenz-Majewski hyperostotic dwarfism (LMHD) is a rare condition characterized by intellectual disability, sclerosing bone dysplasia, dysmorphic facial features, brachydactyly, symphalangism and cutis laxa. Nineteen cases have been reported in the literature so far, eleven of them with PTDSS1 mutations. Although studies have had clinically similar findings, in some cases the authors have reported even rarer features such as hydrocephalus, facial paralysis, and cleft palate. We, hereby, report the case of the first patient with Lenz-Majewski syndrome (LMS) with molecular confirmation from Turkey. Although our patient had characteristic features described in the literature, she also had immunodeficiency, which has not been reported before. Although there is no established phenotype-genotype correlation, molecular mechanisms can be explained with the reporting of more patients.
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Affiliation(s)
- Fayize Maden Bedel
- Department of Pediatric Genetics, Meram Medical School, Necmettin Erbakan University, Konya, Turkey.
| | - Özgür Balasar
- Department of Medical Genetics, Konya City Hospital, Konya, Turkey
| | - Selma Erol Aytekin
- Department of Pediatric Immunology and Allergy, Meram Medical School, Necmettin Erbakan University, Konya, Turkey
| | - Sevgi Keleş
- Department of Pediatric Immunology and Allergy, Meram Medical School, Necmettin Erbakan University, Konya, Turkey
| | - Hüseyin Çaksen
- Department of Pediatric Genetics, Meram Medical School, Necmettin Erbakan University, Konya, Turkey
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2
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Jain S, Narne VK. Auditory Profile of Children With Some Rare Neurodevelopmental Disorders. RESEARCH ANTHOLOGY ON PEDIATRIC AND ADOLESCENT MEDICINE 2022. [DOI: 10.4018/978-1-6684-5360-5.ch014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Neurodevelopmental disorder is an umbrella term comprising many muscular, skeletal, metabolic, endocrinal, systemic, and immune-related diseases, which are caused due to the improper/inaccurate development of the central nervous system. Most of these disorders are highly prevalent, but some express rarely in human beings. Such disorders with least prevalence rates are known as rare neurodevelopmental disorders. The sensory system is affected in all individuals with these rare neurodevelopmental disorders, although to a varying extent. Sensory processing in terms of hearing loss is reported by many researchers in many rare neurodevelopmental disorders, but the pathophysiology of audiological findings are seldom investigated. In this chapter, the authors highlight the possible relationship between underlying cause and the resultant audiological symptoms in some of the rare neurodevelopmental disorders. Further, the research studies on the audiological profiling in such disorders are discussed.
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Seda M, Peskett E, Demetriou C, Bryant D, Moore GE, Stanier P, Jenkins D. Analysis of transgenic zebrafish expressing the Lenz-Majewski syndrome gene PTDSS1 in skeletal cell lineages. F1000Res 2019; 8:273. [PMID: 31231513 PMCID: PMC6557000 DOI: 10.12688/f1000research.17314.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/19/2019] [Indexed: 01/05/2023] Open
Abstract
Background: Lenz-Majewski syndrome (LMS) is characterized by osteosclerosis and hyperostosis of skull, vertebrae and tubular bones as well as craniofacial, dental, cutaneous, and digit abnormalities. We previously found that LMS is caused by de novo dominant missense mutations in the PTDSS1 gene, which encodes phosphatidylserine synthase 1 (PSS1), an enzyme that catalyses the conversion of phosphatidylcholine to phosphatidylserine. The mutations causing LMS result in a gain-of-function, leading to increased enzyme activity and blocking end-product inhibition of PSS1. Methods: Here, we have used transpose-mediated transgenesis to attempt to stably express wild-type and mutant forms of human PTDSS1 ubiquitously or specifically in chondrocytes, osteoblasts or osteoclasts in zebrafish. Results: We report multiple genomic integration sites for each of 8 different transgenes. While we confirmed that the ubiquitously driven transgene constructs were functional in terms of driving gene expression following transient transfection in HeLa cells, and that all lines exhibited expression of a heart-specific cistron within the transgene, we failed to detect PTDSS1 gene expression at either the RNA or protein levels in zebrafish. All wild-type and mutant transgenic lines of zebrafish exhibited mild scoliosis with variable incomplete penetrance which was never observed in non-transgenic animals. Conclusions: Collectively the data suggest that the transgenes are silenced, that animals with integrations that escape silencing are not viable, or that other technical factors prevent transgene expression. In conclusion, the incomplete penetrance of the phenotype and the lack of a matched transgenic control model precludes further meaningful investigations of these transgenic lines.
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Affiliation(s)
- Marian Seda
- GOS Institute of Child Health, University College London, London, WC1N 1EH, UK
| | - Emma Peskett
- GOS Institute of Child Health, University College London, London, WC1N 1EH, UK
| | | | - Dale Bryant
- GOS Institute of Child Health, University College London, London, WC1N 1EH, UK
| | - Gudrun E. Moore
- GOS Institute of Child Health, University College London, London, WC1N 1EH, UK
| | - Philip Stanier
- GOS Institute of Child Health, University College London, London, WC1N 1EH, UK
| | - Dagan Jenkins
- GOS Institute of Child Health, University College London, London, WC1N 1EH, UK
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Mizuguchi K, Miyazaki O, Nishimura G, Ishigro A. Craniovertebral junction stenosis in Lenz-Majewski syndrome. Pediatr Radiol 2015; 45:1567-70. [PMID: 25779830 DOI: 10.1007/s00247-015-3329-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/09/2014] [Accepted: 02/24/2015] [Indexed: 11/30/2022]
Abstract
We report a girl with Lenz-Majewski syndrome associated with craniovertebral junction stenosis that led to communicating hydrocephalus and cervical myelopathy. The life-threatening complication was related to progressive craniovertebral hyperostosis that rapidly exacerbated during early childhood. Despite initial success of surgical intervention at 2 years of age, she developed apneic spells and died suddenly at age 5 years. Close monitoring for craniovertebral junction stenosis is essential to reduce morbidity and mortality in children with Lenz-Majewski syndrome.
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Affiliation(s)
- Koichi Mizuguchi
- Department of General Pediatrics and Interdisciplinary Medicine, National Center for Child Health and Development, 10-1, Okura 2-chome, Setagaya-ku, Tokyo, 157-8535, Japan,
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5
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Tamhankar PM, Vasudevan L, Bansal V, Menon SR, Gawde HM, D'Souza A, Babu S, Kondurkar S, Adhia R, Das DK. Lenz-Majewski syndrome: Report of a case with novel mutation in PTDSS1 gene. Eur J Med Genet 2015; 58:392-9. [PMID: 26117586 DOI: 10.1016/j.ejmg.2015.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 06/10/2015] [Indexed: 11/30/2022]
Abstract
Lenz-Majewski syndrome (LMS) is an extremely rare syndrome characterized by osteosclerosis, intellectual disability, characteristic facies and distinct craniofacial, dental, cutaneous and distal - limb anomalies. Recently, mutations in PTDSS1 gene have been identified as causative in six unrelated individuals. We report the seventh mutation proven case of LMS and provide a concise review of all known patients till date.
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Affiliation(s)
- Parag M Tamhankar
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India.
| | - Lakshmi Vasudevan
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
| | - Vandana Bansal
- Nowrosjee Wadia Maternity Hospital, Parel, Mumbai, India
| | - Shyla R Menon
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
| | - Harshavardhan M Gawde
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
| | - Aruna D'Souza
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
| | - Shiny Babu
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
| | - Shweta Kondurkar
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
| | - Rashmi Adhia
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
| | - Dhanjit Kumar Das
- Genetic Research Center, National Institute for Research in Reproductive Health, JM Street, Parel, Mumbai, India
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Whyte MP, Blythe A, McAlister WH, Nenninger AR, Bijanki VN, Mumm S. Lenz-Majewski hyperostotic dwarfism with hyperphosphoserinuria from a novel mutation in PTDSS1 encoding phosphatidylserine synthase 1. J Bone Miner Res 2015; 30:606-14. [PMID: 25363158 DOI: 10.1002/jbmr.2398] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 10/28/2014] [Accepted: 10/30/2014] [Indexed: 12/15/2022]
Abstract
Lenz-Majewski hyperostotic dwarfism (LMHD) is an ultra-rare Mendelian craniotubular dysostosis that causes skeletal dysmorphism and widely distributed osteosclerosis. Biochemical and histopathological characterization of the bone disease is incomplete and nonexistent, respectively. In 2014, a publication concerning five unrelated patients with LMHD disclosed that all carried one of three heterozygous missense mutations in PTDSS1 encoding phosphatidylserine synthase 1 (PSS1). PSS1 promotes the biosynthesis of phosphatidylserine (PTDS), which is a functional constituent of lipid bilayers. In vitro, these PTDSS1 mutations were gain-of-function and increased PTDS production. Notably, PTDS binds calcium within matrix vesicles to engender hydroxyapatite crystal formation, and may enhance mesenchymal stem cell differentiation leading to osteogenesis. We report an infant girl with LMHD and a novel heterozygous missense mutation (c.829T>C, p.Trp277Arg) within PTDSS1. Bone turnover markers suggested that her osteosclerosis resulted from accelerated formation with an unremarkable rate of resorption. Urinary amino acid quantitation revealed a greater than sixfold elevation of phosphoserine. Our findings affirm that PTDSS1 defects cause LMHD and support enhanced biosynthesis of PTDS in the pathogenesis of LMHD.
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Affiliation(s)
- Michael P Whyte
- Center for Metabolic Bone Disease and Molecular Research, Shriners Hospital for Children, St. Louis, MO; Division of Bone and Mineral Diseases, Washington University School of Medicine at Barnes-Jewish Hospital, St. Louis, MO
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7
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Sousa SB, Jenkins D, Chanudet E, Tasseva G, Ishida M, Anderson G, Docker J, Ryten M, Sa J, Saraiva JM, Barnicoat A, Scott R, Calder A, Wattanasirichaigoon D, Chrzanowska K, Simandlová M, Van Maldergem L, Stanier P, Beales PL, Vance JE, Moore GE. Gain-of-function mutations in the phosphatidylserine synthase 1 (PTDSS1) gene cause Lenz-Majewski syndrome. Nat Genet 2014; 46:70-6. [PMID: 24241535 DOI: 10.1038/ng.2829] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Accepted: 10/23/2013] [Indexed: 12/21/2022]
Abstract
Lenz-Majewski syndrome (LMS) is a syndrome of intellectual disability and multiple congenital anomalies that features generalized craniotubular hyperostosis. By using whole-exome sequencing and selecting variants consistent with the predicted dominant de novo etiology of LMS, we identified causative heterozygous missense mutations in PTDSS1, which encodes phosphatidylserine synthase 1 (PSS1). PSS1 is one of two enzymes involved in the production of phosphatidylserine. Phosphatidylserine synthesis was increased in intact fibroblasts from affected individuals, and end-product inhibition of PSS1 by phosphatidylserine was markedly reduced. Therefore, these mutations cause a gain-of-function effect associated with regulatory dysfunction of PSS1. We have identified LMS as the first human disease, to our knowledge, caused by disrupted phosphatidylserine metabolism. Our results point to an unexplored link between phosphatidylserine synthesis and bone metabolism.
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Affiliation(s)
- Sérgio B Sousa
- 1] Clinical and Molecular Genetics Unit, University College London (UCL) Institute of Child Health, London, UK. [2] Serviço de Genética Médica, Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Dagan Jenkins
- 1] Molecular Medicine Unit, UCL Institute of Child Health, London, UK. [2]
| | - Estelle Chanudet
- 1] Centre for Translational Genomics-GOSgene, UCL Institute of Child Health, London, UK. [2]
| | - Guergana Tasseva
- 1] Group on the Molecular and Cell Biology of Lipids, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada. [2]
| | - Miho Ishida
- Clinical and Molecular Genetics Unit, University College London (UCL) Institute of Child Health, London, UK
| | - Glenn Anderson
- Histopathology Department, Great Ormond Street Hospital for Children, London, UK
| | - James Docker
- Neural Development Unit, UCL Institute of Child Health, London, UK
| | - Mina Ryten
- 1] Reta Lila Weston Institute, UCL Institute of Neurology, London, UK. [2] Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - Joaquim Sa
- Serviço de Genética Médica, Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Jorge M Saraiva
- 1] Serviço de Genética Médica, Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal. [2] University Clinic of Pediatrics, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Angela Barnicoat
- Clinical Genetics Department, Great Ormond Street Hospital, London, UK
| | - Richard Scott
- Clinical Genetics Department, Great Ormond Street Hospital, London, UK
| | - Alistair Calder
- Radiology Department, Great Ormond Street Hospital, London, UK
| | | | - Krystyna Chrzanowska
- Department of Medical Genetics, Children's Memorial Health Institute, Warsaw, Poland
| | - Martina Simandlová
- Department of Biology and Medical Genetics, University Hospital Motol and Second Faculty of Medicine, Prague, Czech Republic
| | - Lionel Van Maldergem
- 1] Centre de Génétique Humaine, Université de Franche-Comté, Besançon, France. [2] Cutis Laxa Study Group, University of Franche-Comté, Besancon, France
| | - Philip Stanier
- Neural Development Unit, UCL Institute of Child Health, London, UK
| | - Philip L Beales
- 1] Molecular Medicine Unit, UCL Institute of Child Health, London, UK. [2] Centre for Translational Genomics-GOSgene, UCL Institute of Child Health, London, UK
| | - Jean E Vance
- Group on the Molecular and Cell Biology of Lipids, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Gudrun E Moore
- Clinical and Molecular Genetics Unit, University College London (UCL) Institute of Child Health, London, UK
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8
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Dateki S, Kondoh T, Nishimura G, Motomura K, Yoshiura KI, Kinoshita A, Kuniba H, Koga Y, Moriuchi H. A Japanese patient with a mild Lenz-Majewski syndrome. J Hum Genet 2007; 52:686-689. [PMID: 17593321 DOI: 10.1007/s10038-007-0165-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2007] [Accepted: 05/17/2007] [Indexed: 10/23/2022]
Abstract
We report on a sclerosing bone dysplasia, associated with cutis laxa, enamel dysplasia, and mental retardation. The patient was a 17-year-old Japanese boy of normal height and muscular build. Cutis laxa with prominent veins in the scalp and abdominal wall and delayed eruption of permanent teeth attracted the attention of clinicians in infancy and adolescence, respectively. The clinical manifestations included a progeroid facial appearance with prognathism, wrinkled skin, and interdigital webbing. The intelligence quotient was estimated at 60. Enamel dysplasia was histologically confirmed. Skeletal changes included calvarial hyperostosis, sclerosis of the skull base, an enlarged, sclerotic mandible, broad clavicles and ribs, and diaphyseal undermodeling of the tubular bones. Metaepiphyseal sclerosis or longitudinal striation was found in the long bones. Metaphyseal equivalents of the axial skeleton showed dense osteosclerosis. These clinical and radiological manifestations overlapped with those of Lenz-Majewski syndrome. Unlike the classical phenotype of the disorder, however, he did not show brachymesophalangy with proximal symphalangism or growth failure. The present case may be considered to fall in the mildest end in the phenotypic continuum of Lenz-Majewski syndrome, suggesting that the clinical spectrum of the disorder may be broader than currently thought.
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Affiliation(s)
- Sumito Dateki
- Department of Pediatrics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8501, Japan.
| | - Tatsuro Kondoh
- Department of Pediatrics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8501, Japan
| | - Gen Nishimura
- Department of Radiology, Tokyo Metropolitan Kiyose Children's Hospital, Tokyo, Japan
| | - Katsuaki Motomura
- Department of Pediatrics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8501, Japan
| | - Koh-Ichiro Yoshiura
- Department of Human Genetics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Akira Kinoshita
- Department of Human Genetics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hideo Kuniba
- Department of Human Genetics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Yoshiyuki Koga
- Division of Oral Pathology and Bone Metabolism, Department of Developmental and Reconstructive Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Hiroyuki Moriuchi
- Department of Pediatrics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8501, Japan
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Wattanasirichaigoon D, Visudtibhan A, Jaovisidha S, Laothamatas J, Chunharas A. Expanding the phenotypic spectrum of Lenz-Majewski syndrome: facial palsy, cleft palate and hydrocephalus. Clin Dysmorphol 2005; 13:137-142. [PMID: 15194948 DOI: 10.1097/01.mcd.0000127468.11641.b7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
We report a sporadic case of Lenz-Majewski syndrome (LMS) with newly recognized manifestations including facial palsy, cleft palate and hydrocephalus developing later in infancy. The clinical course of the patient and neuroimaging studies are described. Increased intracranial pressure was recognized and treated early with the aim of preventing neurological morbidity.
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Abstract
In 1974, Lenz and Majewski gave a short description of a 2-year-old girl with generalized hyperostosis, proximal symphalangism, syndactyly, brachydactyly, cutis laxa, mental retardation, marked hypertelorism, and enamel hypoplasia. This disorder was later named Lenz-Majewski hyperostotic dwarfism. We describe the reexamination of the original patient at the age of 30 years.
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Affiliation(s)
- F Majewski
- Institute of Human Genetics, University of Düsseldorf, Federal Republic of Germany
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