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Li P, Zeng B, Xie W, Xiao X, Lin L, Yu D, Zhao W. Enamel Structure Defects in Kdf1 Missense Mutation Knock-in Mice. Biomedicines 2023; 11:biomedicines11020482. [PMID: 36831017 PMCID: PMC9953722 DOI: 10.3390/biomedicines11020482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
The Keratinocyte differentiation factor 1 (KDF1) is reported to take part in tooth formation in humans, but the dental phenotype of Kdf1 mutant mice has not been understood. Additionally, the role of the KDF1 gene in dental hard tissue development is rarely known. In this study, we constructed a Kdf1 missense mutation knock-in mouse model through CRISPR/Cas9 gene-editing technology. Enamel samples from wildtypes (WT) and Kdf1 homozygous mutants (HO) were examined using micro-computed tomography (micro-CT), scanning electron microscopy (SEM), an atomic force microscope (AFM) and Raman microspectroscopy. The results showed that a novel Kdf1 missense mutation (c. 908G>C, p.R303P) knock-in mice model was constructed successfully. The enamel of HO mice incisors appeared chalky and defective, exposing the rough interior of the inner enamel and dentin. Micro-CT showed that HO mice had lower volume and mineral density in their tooth enamel. In addition, declined thickness was found in the unerupted enamel layer of incisors in the HO mice. Using SEM and AFM, it was found that enamel prisms in HO mice enamel were abnormally and variously shaped with loose decussating crystal arrangement, meanwhile the enamel rods were partially fused and collapsed, accompanied by large gaps. Furthermore, misshapen nanofibrous apatites were disorderly combined with each other. Raman microspectroscopy revealed a compromised degree of order within the crystals in the enamel after the Kdf1 mutation. To conclude, we identified enamel structure defects in the Kdf1 missense mutation knock-in mice, which displayed fragmentary appearance, abnormally shaped prism structure, decreased mineral density, altered crystal ordering degree and chemical composition of the enamel layer. This may support the potential role of the KDF1 gene in the natural development of enamel.
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2
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Okamoto N, Kimura S, Shimojima K, Yamamoto T. Neurological manifestations of 2q31 microdeletion syndrome. Congenit Anom (Kyoto) 2017; 57:197-200. [PMID: 28145600 DOI: 10.1111/cga.12212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/21/2017] [Accepted: 01/24/2017] [Indexed: 11/29/2022]
Abstract
Microdeletion of 2q31 involving the HOXD gene cluster is a rare syndrome. The deletion of the HOXD gene cluster is thought to result in skeletal anomalies in these patients. HOX genes encode highly conserved transcription factors that control cell fate and the regional identities along the primary body and limb axes. We experienced a new patient with 2q31 microdeletion encompassing the HOXD gene cluster and some neighboring genes including the ZNF385B. The patient showed digital anomalies, growth failure, epileptic seizures, and intellectual disability. Magnetic resonance imaging showed delayed myelination and low signal intensity in the basal ganglia. The ZNF385B is a zinc finger protein expressed in brain. Disruption of ZNF385B was suspected to be responsible for the neurological features of this syndrome.
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Affiliation(s)
- Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan
| | - Sadami Kimura
- Department of Pediatric Neurology, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan
| | - Keiko Shimojima
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan
| | - Toshiyuki Yamamoto
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan
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3
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Noll AC, Miller NA, Smith LD, Yoo B, Fiedler S, Cooley LD, Willig LK, Petrikin JE, Cakici J, Lesko J, Newton A, Detherage K, Thiffault I, Saunders CJ, Farrow EG, Kingsmore SF. Clinical detection of deletion structural variants in whole-genome sequences. NPJ Genom Med 2016; 1:16026. [PMID: 29263817 PMCID: PMC5685307 DOI: 10.1038/npjgenmed.2016.26] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 06/22/2016] [Accepted: 06/22/2016] [Indexed: 12/13/2022] Open
Abstract
Optimal management of acutely ill infants with monogenetic diseases requires rapid identification of causative haplotypes. Whole-genome sequencing (WGS) has been shown to identify pathogenic nucleotide variants in such infants. Deletion structural variants (DSVs, >50 nt) are implicated in many genetic diseases, and tools have been designed to identify DSVs using short-read WGS. Optimisation and integration of these tools into a WGS pipeline could improve diagnostic sensitivity and specificity of WGS. In addition, it may improve turnaround time when compared with current CNV assays, enhancing utility in acute settings. Here we describe DSV detection methods for use in WGS for rapid diagnosis in acutely ill infants: SKALD (Screening Konsensus and Annotation of Large Deletions) combines calls from two tools (Breakdancer and GenomeStrip) with calibrated filters and clinical interpretation rules. In four WGS runs, the average analytic precision (positive predictive value) of SKALD was 78%, and recall (sensitivity) was 27%, when compared with validated reference DSV calls. When retrospectively applied to a cohort of 36 families with acutely ill infants SKALD identified causative DSVs in two. The first was heterozygous deletion of exons 1–3 of MMP21 in trans with a heterozygous frame-shift deletion in two siblings with transposition of the great arteries and heterotaxy. In a newborn female with dysmorphic features, ventricular septal defect and persistent pulmonary hypertension, SKALD identified the breakpoints of a heterozygous, de novo 1p36.32p36.13 deletion. In summary, consensus DSV calling, implemented in an 8-h computational pipeline with parameterised filtering, has the potential to increase the diagnostic yield of WGS in acutely ill neonates and discover novel disease genes.
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Affiliation(s)
- Aaron C Noll
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA.,Heartland Institute for Clinical and Translational Research, University of Kansas Medical Center, Kansas City, KS, USA.,Department of Pediatrics, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Neil A Miller
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Laurie D Smith
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA.,Heartland Institute for Clinical and Translational Research, University of Kansas Medical Center, Kansas City, KS, USA.,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Byunggil Yoo
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Stephanie Fiedler
- Department of Pathology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Linda D Cooley
- Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA.,Department of Pathology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Laurel K Willig
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Josh E Petrikin
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Julie Cakici
- Rady Children's Institute for Genomic Medicine, San Diego, CA, USA
| | - John Lesko
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Angela Newton
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Kali Detherage
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Isabelle Thiffault
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA.,Department of Pathology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Carol J Saunders
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA.,Department of Pathology, Children's Mercy Kansas City, Kansas City, MO, USA
| | - Emily G Farrow
- Center for Pediatric Genomic Medicine, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, Children's Mercy Kansas City, Kansas City, MO, USA.,Department of Pediatrics, University of Missouri-Kansas City, Kansas City, MO, USA
| | - Stephen F Kingsmore
- Heartland Institute for Clinical and Translational Research, University of Kansas Medical Center, Kansas City, KS, USA.,Rady Children's Institute for Genomic Medicine, San Diego, CA, USA
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4
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Okamoto N, Toribe Y, Shimojima K, Yamamoto T. Tatton-Brown-Rahman syndrome due to 2p23 microdeletion. Am J Med Genet A 2016; 170A:1339-42. [DOI: 10.1002/ajmg.a.37588] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 01/21/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Nobuhiko Okamoto
- Department of Medical Genetics; Osaka Medical Center and Research Institute for Maternal and Child Health; Osaka Japan
| | | | - Keiko Shimojima
- Tokyo Women's Medical University Institute for Integrated Medical Sciences; Tokyo Japan
| | - Toshiyuki Yamamoto
- Tokyo Women's Medical University Institute for Integrated Medical Sciences; Tokyo Japan
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5
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Mimaki M, Shiihara T, Watanabe M, Hirakata K, Sakazume S, Ishiguro A, Shimojima K, Yamamoto T, Oka A, Mizuguchi M. Holoprosencephaly with cerebellar vermis hypoplasia in 13q deletion syndrome: Critical region for cerebellar dysgenesis within 13q32.2q34. Brain Dev 2015; 37:714-8. [PMID: 25454392 DOI: 10.1016/j.braindev.2014.10.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 10/04/2014] [Accepted: 10/16/2014] [Indexed: 10/24/2022]
Abstract
We describe two unrelated patients with terminal deletions in the long arm of chromosome 13 showing brain malformation consisting of holoprosencephaly and cerebellar vermis hypoplasia. Array comparative genomic hybridization analysis revealed a pure terminal deletion of 13q31.3q34 in one patient and a mosaic ring chromosome with 13q32.2q34 deletion in the other. Mutations in ZIC2, located within region 13q32, cause holoprosencephaly, whereas the 13q32.2q32.3 region is associated with cerebellar vermis hypoplasia (Dandy-Walker syndrome). The rare concurrence of these major brain malformations in our patients provides further evidence that 13q32.2q32.3 deletion, harboring ZIC2 and ZIC5, leads to cerebellar dysgenesis.
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Affiliation(s)
- Masakazu Mimaki
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Japan.
| | | | - Mio Watanabe
- Department of Neurology, Gunma Children's Medical Center, Japan
| | - Kyoko Hirakata
- Department of Ophthalmology, Gunma Children's Medical Center, Japan
| | - Satoru Sakazume
- Clinical Genetics Center, Dokkyo Medical University Koshigaya Hospital, Japan
| | - Akio Ishiguro
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Japan
| | - Keiko Shimojima
- Tokyo Women's Medical University Institute for Integrated Medical Sciences, Japan
| | - Toshiyuki Yamamoto
- Tokyo Women's Medical University Institute for Integrated Medical Sciences, Japan
| | - Akira Oka
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Japan
| | - Masashi Mizuguchi
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Japan; Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, Japan
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6
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Shimada S, Shimojima K, Okamoto N, Sangu N, Hirasawa K, Matsuo M, Ikeuchi M, Shimakawa S, Shimizu K, Mizuno S, Kubota M, Adachi M, Saito Y, Tomiwa K, Haginoya K, Numabe H, Kako Y, Hayashi A, Sakamoto H, Hiraki Y, Minami K, Takemoto K, Watanabe K, Miura K, Chiyonobu T, Kumada T, Imai K, Maegaki Y, Nagata S, Kosaki K, Izumi T, Nagai T, Yamamoto T. Microarray analysis of 50 patients reveals the critical chromosomal regions responsible for 1p36 deletion syndrome-related complications. Brain Dev 2015; 37:515-26. [PMID: 25172301 DOI: 10.1016/j.braindev.2014.08.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 08/01/2014] [Accepted: 08/05/2014] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Monosomy 1p36 syndrome is the most commonly observed subtelomeric deletion syndrome. Patients with this syndrome typically have common clinical features, such as intellectual disability, epilepsy, and characteristic craniofacial features. METHOD In cooperation with academic societies, we analyzed the genomic copy number aberrations using chromosomal microarray testing. Finally, the genotype-phenotype correlation among them was examined. RESULTS We obtained clinical information of 86 patients who had been diagnosed with chromosomal deletions in the 1p36 region. Among them, blood samples were obtained from 50 patients (15 males and 35 females). The precise deletion regions were successfully genotyped. There were variable deletion patterns: pure terminal deletions in 38 patients (76%), including three cases of mosaicism; unbalanced translocations in seven (14%); and interstitial deletions in five (10%). Craniofacial/skeletal features, neurodevelopmental impairments, and cardiac anomalies were commonly observed in patients, with correlation to deletion sizes. CONCLUSION The genotype-phenotype correlation analysis narrowed the region responsible for distinctive craniofacial features and intellectual disability into 1.8-2.1 and 1.8-2.2 Mb region, respectively. Patients with deletions larger than 6.2 Mb showed no ambulation, indicating that severe neurodevelopmental prognosis may be modified by haploinsufficiencies of KCNAB2 and CHD5, located at 6.2 Mb away from the telomere. Although the genotype-phenotype correlation for the cardiac abnormalities is unclear, PRDM16, PRKCZ, and RERE may be related to this complication. Our study also revealed that female patients who acquired ambulatory ability were likely to be at risk for obesity.
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Affiliation(s)
- Shino Shimada
- Tokyo Women's Medical University Institute for Integrated Medical Sciences, Tokyo, Japan; Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Keiko Shimojima
- Tokyo Women's Medical University Institute for Integrated Medical Sciences, Tokyo, Japan
| | - Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center and Research Institute for Maternal and Child Health, Izumi, Japan
| | - Noriko Sangu
- Tokyo Women's Medical University Institute for Integrated Medical Sciences, Tokyo, Japan; Department of Oral and Maxillofacial Surgery, School of Medicine, Tokyo Women's Medical University, Tokyo, Japan
| | - Kyoko Hirasawa
- Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Mari Matsuo
- Institute of Medical Genetics, Tokyo Women's Medical University, Tokyo, Japan
| | - Mayo Ikeuchi
- Department of Pediatrics and Child Neurology, Oita University Faculty of Medicine, Oita, Japan
| | | | - Kenji Shimizu
- Division of Medical Genetics, Saitama Children's Medical Center, Saitama, Japan
| | - Seiji Mizuno
- Department of Pediatrics, Central Hospital, Aichi Human Service Center, Kasugai, Japan
| | - Masaya Kubota
- Division of Neurology, National Center for Child Health and Development, Tokyo, Japan
| | - Masao Adachi
- Department of Pediatrics, Kakogawa Hospital Organization, Kakogawa West-City Hospital, Kakogawa, Japan
| | - Yoshiaki Saito
- Department of Child Neurology, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Kiyotaka Tomiwa
- Department of Pediatrics, Medical Center for Children, Osaka City General Hospital, Osaka, Japan
| | - Kazuhiro Haginoya
- Department of Pediatric Neurology, Takuto Rehabilitation Center for Children, Sendai, Japan
| | - Hironao Numabe
- Department of Genetic Counseling, Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Yuko Kako
- Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
| | - Ai Hayashi
- Department of Neonatology, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto, Japan
| | - Haruko Sakamoto
- Department of Pediatrics, Osaka Red Cross Hospital, Osaka, Japan
| | - Yoko Hiraki
- Hiroshima Municipal Center for Child Health and Development, Hiroshima, Japan
| | - Koichi Minami
- Department of Pediatrics, Wakayama Medical University, Wakayama, Japan
| | | | - Kyoko Watanabe
- Department of Pediatrics, National Hospital Organization Kokura Medical Center, Kitakyushu, Japan
| | - Kiyokuni Miura
- Developmental Disability Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomohiro Chiyonobu
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Tomohiro Kumada
- Department of Pediatrics, Shiga Medical Center for Children, Moriyama, Japan
| | - Katsumi Imai
- National Epilepsy Center, Shizuoka Institute of Epilepsy and Neurological Disorders, Shizuoka, Japan
| | - Yoshihiro Maegaki
- Division of Child Neurology, Tottori University School of Medicine, Yonago, Japan
| | - Satoru Nagata
- Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Tatsuro Izumi
- Department of Pediatrics and Child Neurology, Oita University Faculty of Medicine, Oita, Japan
| | - Toshiro Nagai
- Department of Pediatrics, Dokkyo Medical University Koshigaya Hospital, Saitama, Japan
| | - Toshiyuki Yamamoto
- Tokyo Women's Medical University Institute for Integrated Medical Sciences, Tokyo, Japan.
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7
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Parsons K, Nakatani Y, Nguyen MD. p600/UBR4 in the central nervous system. Cell Mol Life Sci 2015; 72:1149-60. [PMID: 25424645 PMCID: PMC11113099 DOI: 10.1007/s00018-014-1788-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 11/06/2014] [Accepted: 11/17/2014] [Indexed: 10/24/2022]
Abstract
A decade ago, the large 600 kDa mammalian protein p600 (also known as UBR4) was discovered as a multifunctional protein with roles in anoikis, viral transformation and protein degradation. Recently, p600 has emerged as a critical protein in the mammalian brain with roles in neurogenesis, neuronal migration, neuronal signaling and survival. How p600 integrates these apparently unrelated functions to maintain tissue homeostasis and murine survival remains unclear. The common molecular basis underlying many of the actions of p600 suggests, however, certain conservation and transposition of these functions across systems. In this review, we summarize the central nervous system functions of p600 and propose new perspectives on its biological complexity in neuronal physiology and neurological diseases.
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Affiliation(s)
- Kari Parsons
- Department of Clinical Neurosciences, University of Calgary, Hotchkiss Brain Institute, 3330 Hospital Drive NW, Calgary, T2N 4N1, Canada,
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8
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Okamoto N, Ohmachi K, Shimada S, Shimojima K, Yamamoto T. 109 kb deletion of chromosome 4p16.3 in a patient with mild phenotype of Wolf-Hirschhorn syndrome. Am J Med Genet A 2013; 161A:1465-9. [PMID: 23637096 DOI: 10.1002/ajmg.a.35910] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 01/26/2013] [Indexed: 11/09/2022]
Abstract
Wolf-Hirschhorn syndrome (WHS) is a contiguous gene deletion syndrome associated with growth retardation, developmental disabilities, epileptic seizures, and distinct facial features resulting from a deletion of the short arm of chromosome 4. The Wolf-Hirschhorn Syndrome Critical Region WHSCR2 includes the LETM1 gene and 5' end of the WHSC1 gene. A haploinsufficiency of WHSC1 is thought to be responsible for a number of WHS characteristics. We report on a 2-year-old male with severe growth retardation, microcephaly and a characteristic facial appearance. He had no internal anomalies and his developmental milestones were mildly delayed. An array-CGH analysis revealed loss of genomic copy numbers in the region 4p16.3, which included FGFR3, LETM1, and WHSC1. The size of the deletion was only 109 kb. The deletion included the important genes in WHSCR2. We suspect that haploinsufficiency of WHSC1 is the most probable cause of the growth deficiency, microcephaly, and characteristic facial features in WHS.
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Affiliation(s)
- Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan.
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9
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Shichiji M, Ito Y, Shimojima K, Nakamu H, Oguni H, Osawa M, Yamamoto T. A cryptic microdeletion including MBD5 occurring within the breakpoint of a reciprocal translocation between chromosomes 2 and 5 in a patient with developmental delay and obesity. Am J Med Genet A 2013; 161A:850-5. [PMID: 23494922 DOI: 10.1002/ajmg.a.35768] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Accepted: 10/13/2012] [Indexed: 12/17/2022]
Abstract
The 2q23.1 deletion syndrome has been recently recognized as a neurodevelopmental disorder associated with intellectual disability, epilepsy, and autism spectrum disorder. Recently, methyl-CpG-binding domain 5 gene (MBD5), located in the 2q23.1 region, has been considered as a single causative gene of this syndrome. We report on a female patient with a de novo reciprocal translocation between chromosomes 2 and 5. Chromosomal microarray testing revealed a cryptic 896 kb deletion that included MBD5. Although clinical manifestations of this patient are compatible with those of patients with 2q23.1 deletion syndrome, a focal pachygyria revealed by brain magnetic resonance imaging has never been observed in the previously reported cases. Obesity caused by hyperphagia was observed in our patient and 28% of the previously reported patients with the 2q23.1 deletion syndrome. For better medical management, appropriate dietary guidance against hyperphagia should be given to the patients' family.
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Affiliation(s)
- Minobu Shichiji
- Department of Pediatrics, Tokyo Women's Medical University, Tokyo, Japan
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10
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Giannikou K, Fryssira H, Oikonomakis V, Syrmou A, Kosma K, Tzetis M, Kitsiou-Tzeli S, Kanavakis E. Further delineation of novel 1p36 rearrangements by array-CGH analysis: narrowing the breakpoints and clarifying the "extended" phenotype. Gene 2012; 506:360-8. [PMID: 22766398 DOI: 10.1016/j.gene.2012.06.060] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 06/19/2012] [Indexed: 11/15/2022]
Abstract
High resolution oligonucleotide array Comparative Genome Hybridization technology (array-CGH) has greatly assisted the recognition of the 1p36 contiguous gene deletion syndrome. The 1p36 deletion syndrome is considered to be one of the most common subtelomeric microdeletion syndromes and has an incidence of ~1 in 5000 live births, while respectively the "pure" 1p36 microduplication has not been reported so far. We present seven new patients who were referred for genetic evaluation due to Developmental Delay (DD), Mental Retardation (MR), and distinct dysmorphic features. They all had a wide phenotypic spectrum. In all cases previous standard karyotypes were negative. Array-CGH analysis revealed five patients with interstitial 1p36 microdeletion (four de novo and one maternal) and two patients with de novo reciprocal duplication of different sizes. These were the first reported "pure" 1p36 microduplication cases so far. Three of our patients carrying the 1p36 microdeletion syndrome were also found to have additional pathogenetic aberrations. These findings (del 3q27.1; del 4q21.22-q22.1; del 16p13.3; dup 21q21.2-q21.3; del Xp22.12) might contribute to the patients' severe phenotype, acting as additional modifiers of their clinical manifestations. We review and compare the clinical and array-CGH findings of our patients to previously reported cases with the aim of clearly delineating more accurate genotype-phenotype correlations for the 1p36 syndrome that could allow for a more precise prognosis.
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Affiliation(s)
- Krinio Giannikou
- Department of Medical Genetics, Medical School, University of Athens, Greece.
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11
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Okamoto N, Tamura D, Nishimura G, Shimojima K, Yamamoto T. Submicroscopic deletion of 12q13 including HOXC gene cluster with skeletal anomalies and global developmental delay. Am J Med Genet A 2011; 155A:2997-3001. [PMID: 22069146 DOI: 10.1002/ajmg.a.34324] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Accepted: 09/04/2011] [Indexed: 11/11/2022]
Abstract
We report on a patient with a submicroscopic deletion of 12q13 detected by array-CGH and confirmed by FISH. He was haploinsufficient for the HOXC gene cluster and some other neighboring genes. HOX genes have an important role in the initial formation of the body. The patient showed characteristic features including severe kyphoscoliosis, digital abnormalities, cardiac anomaly, expressive language, and global developmental delay. Radiologic features of the fingers had some similarities with those for multiple synostosis syndrome. No human genetic disorders due to HOXC abnormalities are yet known. We tentatively assume that his skeletal anomalies are associated with haploinsufficiency of the HOXC gene cluster. Further studies are necessary to determine the clinical importance of haploinsufficiency of the HOXC gene cluster.
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Affiliation(s)
- Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan.
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12
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Shimojima K, Okanishi T, Yamamoto T. Marfanoid hypermobility caused by an 862 kb deletion of Xq22.3 in a patient with Sotos syndrome. Am J Med Genet A 2011; 155A:2293-7. [DOI: 10.1002/ajmg.a.34164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Accepted: 05/19/2011] [Indexed: 12/19/2022]
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13
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Nicoulaz A, Rubi F, Lieder L, Wolf R, Goeggel-Simonetti B, Steinlin M, Wiest R, Bonel H, Schaller A, Gallati S, Conrad B. Contiguous ∼16 Mb 1p36 deletion: Dominant features of classical distal 1p36 monosomy with haplo-lethality. Am J Med Genet A 2011; 155A:1964-8. [DOI: 10.1002/ajmg.a.33210] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2009] [Accepted: 10/13/2009] [Indexed: 11/08/2022]
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14
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Okamoto N, Hatsukawa Y, Shimojima K, Yamamoto T. Submicroscopic deletion in 7q31 encompassing CADPS2 and TSPAN12 in a child with autism spectrum disorder and PHPV. Am J Med Genet A 2011; 155A:1568-73. [PMID: 21626674 DOI: 10.1002/ajmg.a.34028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Accepted: 03/09/2011] [Indexed: 11/07/2022]
Abstract
We performed array comparative genomic hybridization utilizing a whole genome oligonucleotide microarray in a patient with the autism spectrum disorders (ASDs) and persistent hyperplastic primary vitreous (PHPV). Submicroscopic deletions in 7q31 encompassing CADPS2 (Ca(2+) -dependent activator protein for secretion 2) and TSPAN12 (one of the members of the tetraspanin superfamily) were confirmed. The CADPS2 plays important roles in the release of neurotrophin-3 and brain-derived neurotrophic factor. Mutations in TSPAN12 are a relatively frequent cause of familial exudative vitreoretinopathy. We speculate that haploinsufficiency of CADPS2 and TSPAN12 contributes to ASDs and PHPV, respectively.
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Affiliation(s)
- Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center, Research Institute for Maternal and Child Health, Japan.
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15
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Kibe T, Mori Y, Okanishi T, Shimojima K, Yokochi K, Yamamoto T. Two concurrent chromosomal aberrations involving interstitial deletion in 1q24.2q25.2 and inverted duplication and deletion in 10q26 in a patient with stroke associated with antithrombin deficiency and a patent foramen ovale. Am J Med Genet A 2011; 155A:215-20. [PMID: 21204235 DOI: 10.1002/ajmg.a.33786] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Advanced high-throughput molecular cytogenetic analysis has enabled the identification of small chromosomal rearrangements, and two or more concurrently occurring chromosomal rearrangements have been identified using this technique. A girl with severe psychomotor developmental delay associated with an uncertain abnormality (detected by conventional karyotyping) in chromosome 10q had a sudden stroke at the age of 35 months. Laboratory and radiographic examinations revealed antithrombin (AT) deficiency and a patent foramen ovale (PFO). Two concurrent chromosomal aberrations, inverted duplication and deletion in the 10q26 region and a microdeletion in the 1q24.2q25.2 region including the AT gene (SERPINC1), were identified by microarray-based comparative genomic hybridization analysis. Both chromosomal aberrations were found to be of paternal origin. This study described the concurrence of chromosomal rearrangements involving two chromosomes, and estimated the frequency of two or more chromosomal aberrations as 2-4%.
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Affiliation(s)
- Tetsuya Kibe
- Department of Pediatrics, Seirei-Mikatahara General Hospital, Hamamatsu, Shizuoka, Japan
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Okamoto N, Akimaru N, Matsuda K, Suzuki Y, Shimojima K, Yamamoto T. Co-occurrence of Prader-Willi and Sotos syndromes. Am J Med Genet A 2010; 152A:2103-9. [DOI: 10.1002/ajmg.a.33544] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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