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Abdel-Salam GM, Abdel-Hamid MS, Hassan NA, Issa MY, Effat L, Ismail S, Aglan MS, Zaki MS. Further delineation of the clinical spectrum inRNU4ATACrelated microcephalic osteodysplastic primordial dwarfism type I. Am J Med Genet A 2013; 161A:1875-81. [DOI: 10.1002/ajmg.a.36009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 04/08/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Ghada M.H. Abdel-Salam
- Clinical Genetics Department, Human Genetics and Genome Research Division; National Research Centre; Cairo; Egypt
| | - Mohamed S. Abdel-Hamid
- Medical Molecular Genetics Department, Human Genetics and Genome Research Division; National Research Centre; Cairo; Egypt
| | - Nihal A. Hassan
- Ophthalmology Department, Faculty of Medicine; Cairo University; Cairo; Egypt
| | - Mahmoud Y. Issa
- Clinical Genetics Department, Human Genetics and Genome Research Division; National Research Centre; Cairo; Egypt
| | - Laila Effat
- Medical Molecular Genetics Department, Human Genetics and Genome Research Division; National Research Centre; Cairo; Egypt
| | - Samira Ismail
- Clinical Genetics Department, Human Genetics and Genome Research Division; National Research Centre; Cairo; Egypt
| | - Mona S. Aglan
- Clinical Genetics Department, Human Genetics and Genome Research Division; National Research Centre; Cairo; Egypt
| | - Maha S. Zaki
- Clinical Genetics Department, Human Genetics and Genome Research Division; National Research Centre; Cairo; Egypt
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Abdel-Salam GMH, Miyake N, Eid MM, Abdel-Hamid MS, Hassan NA, Eid OM, Effat LK, El-Badry TH, El-Kamah GY, El-Darouti M, Matsumoto N. A homozygous mutation in RNU4ATAC as a cause of microcephalic osteodysplastic primordial dwarfism type I (MOPD I) with associated pigmentary disorder. Am J Med Genet A 2011; 155A:2885-96. [PMID: 21990275 DOI: 10.1002/ajmg.a.34299] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2011] [Accepted: 08/17/2011] [Indexed: 01/17/2023]
Abstract
The designation microcephalic osteodysplastic primordial dwarfism (MOPD) refers to a group of autosomal recessive disorders, comprising microcephaly, growth retardation, and a skeletal dysplasia. The different types of MOPD have been delineated on the basis of clinical, radiological, and genetic criteria. We describe two brothers, born to healthy, consanguineous parents, with intrauterine and postnatal growth retardation, microcephaly with abnormal gyral pattern and partial agenesis of corpus callosum, and skeletal anomalies reminiscent of those described in MOPD type I. This was confirmed by the identification of the homozygous g.55G > A mutation of RNU4ATAC encoding U4atac snRNA. The sibs had yellowish-gray hair, fair skin, and deficient retinal pigmentation. Skin biopsy showed abnormal melanin function but OCA genes were normal. The older sib had an intracranial hemorrhage at 1 week after birth, the younger developed chilblains-like lesions at the age 2½ years old but analysis of the SAMHD1 and TREX1 genes did not show any mutations. To the best of our knowledge, vasculopathy and pigmentary disorders have not been reported in MOPD I.
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Affiliation(s)
- Ghada M H Abdel-Salam
- Clinical Genetics Department, Human Genetics and Genome Research Division, National Research Centre, Cairo, Egypt.
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Nagy R, Wang H, Albrecht B, Wieczorek D, Gillessen-Kaesbach G, Haan E, Meinecke P, de la Chapelle A, Westman JA. Microcephalic osteodysplastic primordial dwarfism type I with biallelic mutations in the RNU4ATAC gene. Clin Genet 2011; 82:140-6. [PMID: 21815888 DOI: 10.1111/j.1399-0004.2011.01756.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Microcephalic osteodysplastic primordial dwarfism type I (MOPD I) is a rare autosomal recessive developmental disorder characterized by extreme intrauterine growth retardation, severe microcephaly, central nervous system abnormalities, dysmorphic facial features, skin abnormalities, skeletal changes, limb deformations, and early death. Recently, mutations in the RNU4ATAC gene, which encodes U4atac, a small nuclear RNA that is a crucial component of the minor spliceosome, were found to cause MOPD I. MOPD I is the first disease known to be associated with a defect in small nuclear RNAs. We describe here the clinical and molecular data for 17 cases of MOPD I, including 15 previously unreported cases, all carrying biallelic mutations in the RNU4ATAC gene.
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Affiliation(s)
- R Nagy
- Division of Human Genetics, Department of Internal Medicine, The Ohio State University Comprehensive Cancer Center, 2001 Polaris Parkway Columbus, OH 43240, USA.
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Zhang Q, Cho KH, Cho JW, Cha DS, Park HJ, Yoon S, Zhang S, Song CW. Studies on the Small Body Size Mouse Developed by Mutagen N-Ethyl- N-nitrosourea. Toxicol Res 2008; 24:69-78. [PMID: 32038779 PMCID: PMC7006338 DOI: 10.5487/tr.2008.24.1.069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2008] [Accepted: 02/18/2008] [Indexed: 11/20/2022] Open
Abstract
Mutant mouse which show dwarfism has been developed by N-ethyl-N-nitrosourea (ENU) mutagenesis using BALB/c mice. The mutant mouse was inherited as autosomal recessive trait and named Small Body Size (SBS) mouse. The phenotype of SBS mouse was not apparent at birth, but it was possible to distinguish mutant phenotype from normal mice 1 week after birth. In this study, we examined body weight changes and bone mineral density (BMD), and we also carried out genetic linkage analysis to map the causative gene(s) of SBS mouse. Body weight changes were observed from birth to 14 weeks of age in both affected (n = 30) and normal mice (n = 24). BMD was examined in each five SBS and normal mice between 3 and 6 weeks of age, respectively. For the linkage analysis, we produced backcross progeny [(SBS × C57BL/6J) F1 × SBS] N2 mice (n = 142), and seventy-four microsatellite markers were used for primary linkage analysis. Body weight of affected mice was consistently lower than that of the normal mice, and was 43.7% less than that of normal mice at 3 weeks of age (P < 0.001). As compared with normal mice at 3 and 6 weeks of age, BMD of the SBS mice was significantly low. The results showed 15.5% and 14.1% lower in total body BMD, 15.3% and 8.7% lower in forearm BMD, and 29.7% and 20.1% lower in femur BMD, respectively. The causative gene was mapped on chromosome 10. The map order and the distance between markers were D10Mit248 - 2.1 cM - D10Mit51 - 4.2 cM - sbs - 0.7 cM - D10Mit283 - 1.4 cM - D10Mit106 - 11.2 cM - D10Mit170.
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Affiliation(s)
- QianKun Zhang
- 110Department of Research & Development, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, P.O BOX 123, Yuseong, Daejeon, 305-343 Korea.,210Department of Veterinary Medicine, YanBian University, Longjing, China
| | - Kyu-Hyuk Cho
- 110Department of Research & Development, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, P.O BOX 123, Yuseong, Daejeon, 305-343 Korea
| | - Jae-Woo Cho
- 110Department of Research & Development, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, P.O BOX 123, Yuseong, Daejeon, 305-343 Korea
| | - Dal-Sun Cha
- 110Department of Research & Development, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, P.O BOX 123, Yuseong, Daejeon, 305-343 Korea
| | - Han-Jin Park
- 110Department of Research & Development, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, P.O BOX 123, Yuseong, Daejeon, 305-343 Korea
| | - Seokjoo Yoon
- 110Department of Research & Development, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, P.O BOX 123, Yuseong, Daejeon, 305-343 Korea
| | - ShouFa Zhang
- 210Department of Veterinary Medicine, YanBian University, Longjing, China
| | - Chang-Woo Song
- 110Department of Research & Development, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, P.O BOX 123, Yuseong, Daejeon, 305-343 Korea
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Nadjari M, Fasouliotis SJ, Ariel I, Raas-Rothschild A, Bar-Ziv J, Elchalal U. Ultrasonographic prenatal diagnosis of microcephalic osteodysplastic primordial dwarfism types I/III. Prenat Diagn 2000; 20:666-9. [PMID: 10951479 DOI: 10.1002/1097-0223(200008)20:8<666::aid-pd887>3.0.co;2-l] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Microcephalic osteodysplastic primordial dwarfism is a rare disease characterized by unique clinical appearance and specific radiographic findings, and distinctive brain abnormalities. We describe the prenatal diagnosis of two siblings with microcephalic osteodysplastic primordial dwarfism types I/III at 23 and 26 weeks of gestation, respectively. Early detection by sequential antenatal sonographic evaluation is important for counselling families known to be at risk of this rare disease.
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Affiliation(s)
- M Nadjari
- Department of Obstetrics and Gynecology, Hadassah Ein-Kerem Medical Center, The Hebrew University Medical School, Jerusalem, Israel
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Sigaudy S, Toutain A, Moncla A, Fredouille C, Bourli�re B, Ayme S, Philip N. Microcephalic osteodysplastic primordial dwarfism Taybi-Linder type: Report of four cases and review of the literature. ACTA ACUST UNITED AC 1998. [DOI: 10.1002/(sici)1096-8628(19981102)80:1<16::aid-ajmg4>3.0.co;2-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Berger A, Haschke N, Kohlhauser C, Amman G, Unterberger U, Weninger M. Neonatal cholestasis and focal medullary dysplasia of the kidneys in a case of microcephalic osteodysplastic primordial dwarfism. J Med Genet 1998; 35:61-4. [PMID: 9475098 PMCID: PMC1051190 DOI: 10.1136/jmg.35.1.61] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We report on a male infant who presented with intrauterine growth retardation, severe postnatal failure to thrive, microcephaly, facial dysmorphism, and skeletal dysplasia. The clinical and radiological findings are consistent with former descriptions of microcephalic osteodysplastic primordial dwarfism (MOPD) type I/III. In addition to previously published features, multiple fractures of the long bones, severe neonatal cholestasis, and histological dysplasia of the kidneys were found. The boy died at the age of 8 months. The new finding of focal renal medullary dysplasia further supports the hypothesis of a basic defect in tissue differentiation in the pathogenesis of this rare condition.
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Affiliation(s)
- A Berger
- University Children's Hospital Vienna, AKH, Department of Neonatology, Austria
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