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Guo J, He WB, Dai L, Tian F, Luo Z, Shen F, Tu M, Zheng Y, Zhao L, Tan C, Guo Y, Meng LL, Liu W, Deng M, Wu X, Peng Y, Zhang S, Lu GX, Lin G, Wang H, Tan YQ, Yang Y. Mosaic variegated aneuploidy syndrome with tetraploid, and predisposition to male infertility triggered by mutant CEP192. HGG ADVANCES 2024; 5:100256. [PMID: 37981762 PMCID: PMC10716027 DOI: 10.1016/j.xhgg.2023.100256] [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: 08/03/2023] [Revised: 11/15/2023] [Accepted: 11/15/2023] [Indexed: 11/21/2023] Open
Abstract
In this study, we report on mosaic variegated aneuploidy (MVA) syndrome with tetraploidy and predisposition to infertility in a family. Sequencing analysis identified that the CEP192 biallelic variants (c.1912C>T, p.His638Tyr and c.5750A>G, p.Asn1917Ser) segregated with microcephaly, short stature, limb-extremity dysplasia, and reduced testicular size, while CEP192 monoallelic variants segregated with infertility and/or reduced testicular size in the family. In 1,264 unrelated patients, variant screening for CEP192 identified a same variant (c.5750A>G, p.Asn1917Ser) and other variants significantly associated with infertility. Two lines of Cep192 mice model that are equivalent to human variants were generated. Embryos with Cep192 biallelic variants arrested at E7 because of cell apoptosis mediated by MVA/tetraploidy cell acumination. Mice with heterozygous variants replicated the predisposition to male infertility. Mouse primary embryonic fibroblasts with Cep192 biallelic variants cultured in vitro showed abnormal morphology, mitotic arresting, and disruption of spindle formation. In patient epithelial cells with biallelic variants cultured in vitro, the number of cells arrested during the prophase increased because of the failure of spindle formation. Accordingly, we present mutant CEP192, which is a link for the MVA syndrome with tetraploidy and the predisposition to male infertility.
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Affiliation(s)
- Jihong Guo
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Wen-Bin He
- Hunan Guangxiu Hospital, Hunan Normal University School of Medicine, Changsha, China; Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Lei Dai
- Department of Obstetrics, Xiangya Hospital of Central South University, Changsha, China
| | - Fen Tian
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Zhenqing Luo
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Fang Shen
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Ming Tu
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Yu Zheng
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Liu Zhao
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Chen Tan
- Hunan Guangxiu Hospital, Hunan Normal University School of Medicine, Changsha, China; Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Yongteng Guo
- Hunan Guangxiu Hospital, Hunan Normal University School of Medicine, Changsha, China; Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Lan-Lan Meng
- Hunan Guangxiu Hospital, Hunan Normal University School of Medicine, Changsha, China; Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Wei Liu
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Mei Deng
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Xinghan Wu
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Yu Peng
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Shuju Zhang
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Guang-Xiu Lu
- Hunan Guangxiu Hospital, Hunan Normal University School of Medicine, Changsha, China; Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Ge Lin
- Hunan Guangxiu Hospital, Hunan Normal University School of Medicine, Changsha, China; Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China
| | - Hua Wang
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China
| | - Yue-Qiu Tan
- Hunan Guangxiu Hospital, Hunan Normal University School of Medicine, Changsha, China; Institute of Reproductive and Stem Cell Engineering, NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, School of Basic Medical Science, Central South University, Changsha, China.
| | - Yongjia Yang
- Department of Medical Genetics, Hunan Children's Hospital, Xiangya Medical School & Reproductive Medicine Center, Xiangya Hospital, Central South University, Changsha, China.
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Zhang N, Hu Q, Sui T, Fu L, Zhang X, Wang Y, Zhu X, Huang B, Lu J, Li Z, Zhang Y. Unique progerin C-terminal peptide ameliorates Hutchinson-Gilford progeria syndrome phenotype by rescuing BUBR1. NATURE AGING 2023; 3:185-201. [PMID: 36743663 PMCID: PMC10154249 DOI: 10.1038/s43587-023-00361-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 01/04/2023] [Indexed: 04/30/2023]
Abstract
An accumulating body of evidence indicates an association between mitotic defects and the aging process in Hutchinson-Gilford progeria syndrome (HGPS), which is a premature aging disease caused by progerin accumulation. Here, we found that BUBR1, a core component of the spindle assembly checkpoint, was downregulated during HGPS cellular senescence. The remaining BUBR1 was anchored to the nuclear membrane by binding with the C terminus of progerin, thus further limiting the function of BUBR1. Based on this, we established a unique progerin C-terminal peptide (UPCP) that effectively blocked the binding of progerin and BUBR1 and enhanced the expression of BUBR1 by interfering with the interaction between PTBP1 and progerin. Finally, UPCP significantly inhibited HGPS cellular senescence and ameliorated progeroid phenotypes, extending the lifespan of LmnaG609G/G609G mice. Our findings reveal an essential role for the progerin-PTBP1-BUBR1 axis in HGPS. Therapeutics designed around UPCP may be a beneficial strategy for HGPS treatment.
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Affiliation(s)
- Na Zhang
- Key Laboratory of Molecular Epigenetics of Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Qianying Hu
- Key Laboratory of Molecular Epigenetics of Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Tingting Sui
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Science, Jilin University, Changchun, China
| | - Lu Fu
- Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Xinglin Zhang
- Key Laboratory of Molecular Epigenetics of Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Yu Wang
- Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Xiaojuan Zhu
- Key Laboratory of Molecular Epigenetics of Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Baiqu Huang
- Key Laboratory of Molecular Epigenetics of Ministry of Education (MOE), Northeast Normal University, Changchun, China
| | - Jun Lu
- Institute of Genetics and Cytology, Northeast Normal University, Changchun, China.
| | - Zhanjun Li
- Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Science, Jilin University, Changchun, China.
| | - Yu Zhang
- Key Laboratory of Molecular Epigenetics of Ministry of Education (MOE), Northeast Normal University, Changchun, China.
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Pavone P, Pappalardo XG, Mustafa N, Falsaperla R, Marino SD, Corsello G, Bianca S, Parano E, Ruggieri M. Pathogenic correlation between mosaic variegated aneuploidy 1 (MVA1) and a novel BUB1B variant: a reappraisal of a severe syndrome. Neurol Sci 2022; 43:6529-6538. [PMID: 35804254 PMCID: PMC9616775 DOI: 10.1007/s10072-022-06247-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 04/19/2022] [Indexed: 12/01/2022]
Abstract
Background The BUB 1 mitotic checkpoint serine/threonine kinase B (BUB1B) gene encodes a key protein in the mitotic spindle checkpoint, which acts as a surveillance mechanism, crucial for the maintenance of the correct chromosome number during cell deviation. Mutations of BUB1B gene are linked to mosaic variegated aneuploidy 1 (MVA1) syndrome, a rare autosomal recessive disorder characterized by widespread mosaic aneuploidies, involving different chromosomes and tissues. MVA1 is clinically characterized by intrauterine growth restriction, post-natal growth retardation, and severe neurologic impairment including microcephaly, developmental delay/intellectual disability, epileptic seizures, and generalized hypotonia. Malignancies are also serious sequelae associated with the disorder. We reported on a case of two-year-old Italian girl with MVA1 who shows severe neurologic impairment, microcephaly and epileptic seizures. Materials and methods Clinical data collection and genetic diagnosis of the patient were assessed. Mutational analysis covers the chromosomal microarray analysis, the gene methylation pattern studied using the methylation-specific multiplex ligation-dependent probe amplification, and the family-based Whole Exome Sequencing (WES). A literature research based on reported cases of MVA and premature chromatid separation was also included. Results Karyotyping has revealed 12% of mosaics in the patient who carries a novel variant in BUB1B gene (c.2679A > T, p.Arg893Ser) detected by WES. Thirty-one cases of MVA1 including the present report, and four prenatally diagnosed cases with MVA1 were selected and inspected. Conclusion Clinical and genetic findings reported in the girl strongly suggest a new MVA1 genotype–phenotype correlation and lead to a reappraisal of a severe syndrome. Diagnosis and in-depth follow-up provided worthwhile data. Supplementary Information The online version contains supplementary material available at 10.1007/s10072-022-06247-w.
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Affiliation(s)
- Piero Pavone
- Pediatric Clinic, Department of Clinical and Experimental Medicine, University Hospital A.U.O. "Policlinico-Vittorio Emanuele, Catania, Italy.
| | - Xena Giada Pappalardo
- National Council of Research, Institute for Biomedical Research and Innovation (IRIB), Unit of Catania, Catania, Italy
- Department of Biomedical and Biotechnological Sciences (BIOMETEC), University of Catania, Catania, Italy
| | - Naira Mustafa
- Department of Paediatrics, School of Clinical Medicine, University of Cambridge, Cambridge, UK
- Department of Clinical and Chemical Pathology, Faculty of Medicine, Cairo University, Giza, Egypt
| | - Raffaele Falsaperla
- Pediatrics and Pediatric Emergency Department, University Hospital, A.U.O "Policlinico Vittorio Emanuele", Catania, Italy
| | - Simona Domenica Marino
- Pediatrics and Pediatric Emergency Department, University Hospital, A.U.O "Policlinico Vittorio Emanuele", Catania, Italy
| | - Giovanni Corsello
- Mother and Child Department, Operative Unit of Pediatrics and Neonatal Intensive Therapy, University of Palermo, Palermo, Italy
| | - Sebastiano Bianca
- Medical Genetics, Referral Centre for Rare Genetic Diseases, ARNAS Garibaldi, Catania, Italy
| | - Enrico Parano
- National Council of Research, Institute for Biomedical Research and Innovation (IRIB), Unit of Catania, Catania, Italy
| | - Martino Ruggieri
- Unit of Rare Diseases of the Nervous System in Childhood, Department of Clinical and Experimental Medicine, Section of Pediatrics and Child Neuropsychiatry, University of Catania, AOU "Policlinico," PO "G. Rodolico, Catania, Italy.
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Santos-Simarro F, Pacio M, Cueto-González AM, Mansilla E, Valenzuela-Palafoll MI, López-Grondona F, Lledín MD, Schuffelmann C, Del Pozo Á, Solis M, Vallcorba P, Lapunzina P, Menéndez Suso JJ, Siccha SM, Montejo JM, Mena R, Jiménez-Rodríguez C, García-Miñaúr S, Palomares-Bralo M. Mosaic Variegated Aneuploidy syndrome 2 caused by biallelic variants in CEP57, two new cases and review of the phenotype. Eur J Med Genet 2021; 64:104338. [PMID: 34500087 DOI: 10.1016/j.ejmg.2021.104338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 09/01/2021] [Accepted: 09/04/2021] [Indexed: 11/20/2022]
Abstract
Mosaic Variegated Aneuploidy Syndrome 2 (MVA2; MIM 614114) is a rare autosomal recessive disorder, characterized by mosaic aneuploidies involving multiple chromosomes and tissues, caused by biallelic pathogenic variants in the CEP57 gene. Only 10 patients have been reported to date. We report two additional non related cases born to Moroccan consanguineous parents, carrying the previously described c.915_925dup11 CEP57 homozygous variant. Common features of these 12 cases include growth retardation, typically of prenatal onset, distinctive facial features, endocrine, cardiovascular and skeletal, abnormalities while malignancies have not been reported. This report describes the phenotypical spectrum of MVA2.
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Affiliation(s)
- Fernando Santos-Simarro
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain; European Reference Network, ERN ITHACA, Spain.
| | - Marta Pacio
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain; European Reference Network, ERN ITHACA, Spain.
| | - Anna María Cueto-González
- Departamento de Genética Clinical y Molecular,Grupo de Genética Médica, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Institut de Recerca (VHIR), Hospital Universitari, Vall d'Hebron, Barcelona, Spain; European Reference Network, ERN ITHACA, Spain; European Reference Network, ERN CRANIO, Spain.
| | - Elena Mansilla
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain; European Reference Network, ERN ITHACA, Spain.
| | - María Irene Valenzuela-Palafoll
- Departamento de Genética Clinical y Molecular,Grupo de Genética Médica, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Institut de Recerca (VHIR), Hospital Universitari, Vall d'Hebron, Barcelona, Spain; European Reference Network, ERN ITHACA, Spain.
| | - Fermina López-Grondona
- Departamento de Genética Clinical y Molecular,Grupo de Genética Médica, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Institut de Recerca (VHIR), Hospital Universitari, Vall d'Hebron, Barcelona, Spain.
| | - María Dolores Lledín
- Servicio de Hepatología Pediátrica, Hospital Universitario La Paz, Madrid, Spain.
| | - Cristina Schuffelmann
- Servicio de Cuidados Intensivos Pediátricos, Hospital Universitario La Paz, Madrid, Spain.
| | - Ángela Del Pozo
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain.
| | - Mario Solis
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain.
| | - Patricia Vallcorba
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain; European Reference Network, ERN ITHACA, Spain.
| | - Pablo Lapunzina
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain; European Reference Network, ERN ITHACA, Spain.
| | | | - Sofia M Siccha
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain.
| | - Juan Manuel Montejo
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain.
| | - Rocío Mena
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain.
| | - Carmen Jiménez-Rodríguez
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain.
| | - Sixto García-Miñaúr
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain; European Reference Network, ERN ITHACA, Spain.
| | - María Palomares-Bralo
- Instituto de Genética Medica y Molecular (INGEMM), Hospital Universitario La Paz, IdiPAZ, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, U753), ISCIII, Madrid, Spain; European Reference Network, ERN ITHACA, Spain.
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Follow-up of two adult brothers with homozygous CEP57 pathogenic variants expands the phenotype of Mosaic Variegated Aneuploidy Syndrome. Eur J Med Genet 2020; 63:104044. [PMID: 32861809 DOI: 10.1016/j.ejmg.2020.104044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 07/15/2020] [Accepted: 08/20/2020] [Indexed: 11/23/2022]
Abstract
Mosaic Variegated Aneuploidy Syndrome (MVA) is a rare autosomal recessive disorder characterized by mosaic aneuploidies involving multiple chromosomes and tissues. Affected individuals typically present with severe intrauterine and postnatal growth retardation, microcephaly, facial dysmorphism, developmental delay and predisposition to cancer and epilepsy. Three genes, BUB1B, CEP57 and TRIP13, are involved in this syndrome. Only 7 patients carrying pathogenic variants in CEP57 are reported to date. Here we report two adult brothers born to Moroccan related parents, who presented with intrauterine and postnatal growth retardation, microcephaly, facial dysmorphism, learning disabilities, skeletal anomalies with thumb hypoplasia and dental abnormalities. Both brothers have mosaic variegated aneuploidies on blood karyotype. A previously reported homozygous 11 bp duplication was identified in CEP57 in the two brothers. We propose that a FoSTeS (Fork Stalling and Template Switching) mechanism could be involved in the occurrence of this duplication. This report expands the phenotypical spectrum associated with CEP57 and highlights the interest of blood karyotype in patients presenting with short stature and microcephaly.
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BubR1 Insufficiency Impairs Affective Behavior and Memory Function in Mice. Int Neurourol J 2018; 22:S122-130. [PMID: 30396261 PMCID: PMC6234727 DOI: 10.5213/inj.1836218.109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 10/12/2018] [Indexed: 12/20/2022] Open
Abstract
PURPOSE Although aging causes functional declines in cognition, the molecular mechanism underlying these declines remains largely unknown. Recently, the spindle checkpoint kinase budding uninhibited by benzimidazole-related 1 (BubR1) has emerged as a key determinant for age-related pathology in various tissues including brain. However, the neurobehavioral impact of BubR1 has not been explored. In this study, we investigated the role of BubR1 in behavioral function. METHODS To investigate the neurobiological functions of BubR1 in vivo, we utilized transgenic mice harboring BubR1 hypomorphic alleles (BubR1H/H mice), which produce low amounts of BubR1 protein, as well as mice that have specific knockdown of BubR1 in the adult dentate gyrus. To assess anxiety-like behavior, the above groups were subjected to the elevated plus maze and the light-dark test, in addition to utilizing the tail-suspension and forced-swim test to determine depression-like behavior. We used novel object recognition to test for memory-related function. RESULTS We found that BubR1H/H mice display several behavioral deficits when compared to wild-type littermates, including increased anxiety in the elevated-plus maze test, depression-like behavior in the tail suspension test, as well as impaired memory function in the novel object recognition test. Similar to BubR1H/H mice, knockdown of BubR1 within the adult dentate gyrus led to increased anxiety-like behavior as well as depression-like behavior, and impaired memory function. CONCLUSION Our study demonstrates a requirement of BubR1 in maintaining proper affective and memory-related behavioral function. These results suggest that a decline in BubR1 levels with advanced age may be a crucial contributor to age-related hippocampal dysfunction.
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Chaker F, Chihaoui M, Yazidi M, Rejeb O, Slimane H, Neji S, Kraoua H. Polycystic ovary syndrome: A new phenotype in mosaic variegated aneuploidy syndrome? ANNALES D'ENDOCRINOLOGIE 2017; 78:58-61. [PMID: 27931980 DOI: 10.1016/j.ando.2016.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 07/08/2016] [Accepted: 08/23/2016] [Indexed: 06/06/2023]
Affiliation(s)
- Fatma Chaker
- Department of endocrinology and diabetes, Rabta university hospital, Faculty of medicine, University of Tunis El Manar, Tunis, Tunisia.
| | - Mélika Chihaoui
- Department of endocrinology and diabetes, Rabta university hospital, Faculty of medicine, University of Tunis El Manar, Tunis, Tunisia.
| | - Meriem Yazidi
- Department of endocrinology and diabetes, Rabta university hospital, Faculty of medicine, University of Tunis El Manar, Tunis, Tunisia.
| | - Ons Rejeb
- Department of endocrinology and diabetes, Rabta university hospital, Faculty of medicine, University of Tunis El Manar, Tunis, Tunisia.
| | - Hedia Slimane
- Department of endocrinology and diabetes, Rabta university hospital, Faculty of medicine, University of Tunis El Manar, Tunis, Tunisia.
| | - Sonia Neji
- Department of neuroradiology, National Institute of Neurology, Faculty of medicine, University of Tunis El Manar, Tunis, Tunisia.
| | - Houda Kraoua
- Department of genetics, Charles Nicolles university hospital, Faculty of medicine, University of Tunis El Manar, Tunis, Tunisia.
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North BJ, Rosenberg MA, Jeganathan KB, Hafner AV, Michan S, Dai J, Baker DJ, Cen Y, Wu LE, Sauve AA, van Deursen JM, Rosenzweig A, Sinclair DA. SIRT2 induces the checkpoint kinase BubR1 to increase lifespan. EMBO J 2014; 33:1438-53. [PMID: 24825348 PMCID: PMC4194088 DOI: 10.15252/embj.201386907] [Citation(s) in RCA: 170] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 01/22/2014] [Accepted: 03/09/2014] [Indexed: 12/21/2022] Open
Abstract
Mice overexpressing the mitotic checkpoint kinase gene BubR1 live longer, whereas mice hypomorphic for BubR1 (BubR1(H/H)) live shorter and show signs of accelerated aging. As wild-type mice age, BubR1 levels decline in many tissues, a process that is proposed to underlie normal aging and age-related diseases. Understanding why BubR1 declines with age and how to slow this process is therefore of considerable interest. The sirtuins (SIRT1-7) are a family of NAD(+)-dependent deacetylases that can delay age-related diseases. Here, we show that the loss of BubR1 levels with age is due to a decline in NAD(+) and the ability of SIRT2 to maintain lysine-668 of BubR1 in a deacetylated state, which is counteracted by the acetyltransferase CBP. Overexpression of SIRT2 or treatment of mice with the NAD(+) precursor nicotinamide mononucleotide (NMN) increases BubR1 abundance in vivo. Overexpression of SIRT2 in BubR1(H/H) animals increases median lifespan, with a greater effect in male mice. Together, these data indicate that further exploration of the potential of SIRT2 and NAD(+) to delay diseases of aging in mammals is warranted.
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Affiliation(s)
- Brian J North
- Department of Genetics, Paul F. Glenn Laboratories for the Biological Mechanisms of Aging Harvard Medical School, Boston, MA, USA
| | - Michael A Rosenberg
- Cardiovascular Division, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, MA, USA
| | - Karthik B Jeganathan
- Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Angela V Hafner
- Department of Genetics, Paul F. Glenn Laboratories for the Biological Mechanisms of Aging Harvard Medical School, Boston, MA, USA
| | - Shaday Michan
- Department of Genetics, Paul F. Glenn Laboratories for the Biological Mechanisms of Aging Harvard Medical School, Boston, MA, USA
| | - Jing Dai
- Cardiovascular Division, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, MA, USA
| | - Darren J Baker
- Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Yana Cen
- Department of Pharmacology, Weill Medical College of Cornell University, New York, NY, USA
| | - Lindsay E Wu
- Department of Pharmacology, School of Medicine The University of New South Wales, Sydney, NSW, Australia
| | - Anthony A Sauve
- Department of Pharmacology, Weill Medical College of Cornell University, New York, NY, USA
| | - Jan M van Deursen
- Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Anthony Rosenzweig
- Cardiovascular Division, Beth Israel Deaconess Medical Center Harvard Medical School, Boston, MA, USA
| | - David A Sinclair
- Department of Genetics, Paul F. Glenn Laboratories for the Biological Mechanisms of Aging Harvard Medical School, Boston, MA, USA Department of Pharmacology, School of Medicine The University of New South Wales, Sydney, NSW, Australia
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Baker DJ, Weaver RL, van Deursen JM. p21 both attenuates and drives senescence and aging in BubR1 progeroid mice. Cell Rep 2013; 3:1164-74. [PMID: 23602569 DOI: 10.1016/j.celrep.2013.03.028] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 02/11/2013] [Accepted: 03/20/2013] [Indexed: 02/04/2023] Open
Abstract
BubR1 insufficiency occurs with natural aging and induces progeroid phenotypes in both mice and children with mosaic variegated aneuploidy syndrome. In response to BubR1 insufficiency, skeletal muscle, fat, and lens tissue engage p19(Arf) to attenuate senescence and age-related deterioration. Here, we address how p19(Arf) exerts this caretaker role using BubR1 progeroid mice lacking p53 or its transcriptional target p21. We show that p53 delays functional decline of skeletal muscle and fat in a p21-dependent fashion by inhibiting p16(Ink4a)-mediated senescence of progenitor cells. Strikingly, p53 also attenuates the formation of cataractous lenses, but here its antiaging effect is p21 independent, as we found p21 to promote senescence of lens epithelial cells and cataract formation. Together, these results demonstrate that p53 counteracts tissue destruction in response to BubR1 insufficiency through diverse mechanisms and uncover a causal link between senescence of the progenitor cell compartment and age-related dysfunction.
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Affiliation(s)
- Darren J Baker
- Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
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Snape K, Hanks S, Ruark E, Barros-Núñez P, Elliott A, Murray A, Lane AH, Shannon N, Callier P, Chitayat D, Clayton-Smith J, Fitzpatrick DR, Gisselsson D, Jacquemont S, Asakura-Hay K, Micale MA, Tolmie J, Turnpenny PD, Wright M, Douglas J, Rahman N. Mutations in CEP57 cause mosaic variegated aneuploidy syndrome. Nat Genet 2011; 43:527-9. [PMID: 21552266 PMCID: PMC3508359 DOI: 10.1038/ng.822] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Accepted: 04/06/2011] [Indexed: 12/18/2022]
Abstract
Using exome sequencing and a variant prioritization strategy that focuses on loss-of-function variants, we identified biallelic, loss-of-function CEP57 mutations as a cause of constitutional mosaic aneuploidies. CEP57 is a centrosomal protein and is involved in nucleating and stabilizing microtubules. Our findings indicate that these and/or additional functions of CEP57 are crucial for maintaining correct chromosomal number during cell division.
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Affiliation(s)
- Katie Snape
- Section of Cancer Genetics, Institute of Cancer Research, Sutton, UK
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11
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Micale MA, Schran D, Emch S, Kurczynski TW, Rahman N, Van Dyke DL. Mosaic variegated aneuploidy without microcephaly: implications for cytogenetic diagnosis. Am J Med Genet A 2007; 143A:1890-3. [PMID: 17632782 DOI: 10.1002/ajmg.a.31848] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Mosaic variegated aneuploidy (MVA) is a rare condition characterized by multiple trisomies, rarely monosomies, and a non-specific phenotype including microcephaly, growth and mental retardation, mild malformations, and an increased risk of malignancy. We describe a patient with MVA in whom trisomy 19 mosaicism was originally suspected. The patient was the product of an uncomplicated term pregnancy and delivery. Significant findings were mental retardation, obesity, mild epicanthal folds, tapering fingers, relatively small hands and feet, alternating exotropia, nasal speech limited to short phrases, and generalized hypotonia. There is no family history for birth defects, mental retardation, or consanguinity. The initial peripheral blood chromosome study showed trisomy 19 in 4 of 31 metaphase cells. Because mosaic trisomy 19 is rare, the study was extended to 100 cells, wherein two cells with trisomy 8 were identified. A second blood karyotype was obtained and found to be 47,XX,+8[3]/47,XX,+19[3]/47,XX, +18[2]/47,XX,+9[1]/46,XX[91]. Skin fibroblast chromosome studies revealed a 46,XX karyotype in 120 cells examined. There was no evidence of premature centromere separation. Mutations in the BUB1B gene that encodes a key mitotic spindle checkpoint protein have been described in MVA; however, no mutations of this gene were identified in our patient. This case illustrates the importance of considering other possibilities when confronted with an extremely rare diagnosis such as mosaic trisomy 19. In addition, it shows the importance of not simply interpreting a low percentage of multiple aneuploidies as cell culture artifact, because an additional work-up to rule out MVA may be warranted since this diagnosis is associated with an increased risk of malignancy.
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Callier P, Faivre L, Cusin V, Marle N, Thauvin-Robinet C, Sandre D, Rousseau T, Sagot P, Lacombe E, Faber V, Mugneret F. Microcephaly is not mandatory for the diagnosis of mosaic variegated aneuploidy syndrome. Am J Med Genet A 2005; 137:204-7. [PMID: 16059936 DOI: 10.1002/ajmg.a.30783] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The phenotype of mosaic variegated aneuploidy (MVA) syndrome is characterized by severe microcephaly, growth deficiency, mental retardation, and mild physical anomalies. The MVA syndrome is associated with mosaicism for several different aneuploidies involving many different chromosomes with or without premature centromere division (PCD). To date 28 cases of MVA syndrome have been reported. We report the first case of MVA syndrome without microcephaly. The clinical features in our patient included craniofacial dysmorphic features, growth retardation, and developmental delay. Cytogenetics analyses and FISH studies showed multiple aneuploidy with trisomy 18, 19, and 8, respectively in blood lymphocyte and fibroblasts without PCD. This case is compared with the other of MVA syndrome previously reported in literature. From this case report, we suggest that microcephaly is not mandatory for the diagnosis of MVA syndrome.
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Affiliation(s)
- P Callier
- Département de Génétique, Laboratoire de Cytogénetique, CHU Le Bocage, Boulevard Marechal de Lattre de Tassigny 2, Dijon 21034, France.
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13
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Girard C, Guillot B, Rivier F, Dalla Vale F, Bessis D. Mosaïcisme pigmentaire de type Ito révélant une trisomie 20 en mosaïque. Ann Dermatol Venereol 2005; 132:151-3. [PMID: 15798568 DOI: 10.1016/s0151-9638(05)79229-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
INTRODUCTION Ito hypomelanosis-type pigmentary mosaicism is characterized by congenital pigmentation disorders along Blaschko's lines. We report a case of Ito-type pigmentary mosaicism associated with a congenital growth hormone deficiency having revealed trisomy 20 mosaicism. OBSERVATION A 4 year-old boy presented with congenital pigmentation disorders. His history was marked by: inter-uterine delayed growth of unknown etiology, a dysmorphic syndrome, psychomotor retardation with speech problems, right cryptorchidia and an isolated, idiopathic, congenital growth hormone deficiency that had been treated with recombinant somatropine since the age of three. The clinical examination revealed alternating hypo and hyper-pigmented maculae with linear distribution on the limbs and in "twirls" on the trunk following Blaschko's lines. The blood karyotype was normal, the karyotype on fibroblasts of hypopigmented skin revealed trisomy 20 mosaicism. DISCUSSION The occurrence of pigmentary mosaicism related to trisomy 20 mosaicism is exceptional. The combination of Ito hypomelanosis-type pigmentary mosaicism and delayed growth due to growth hormone deficiency has never been reported before. Our observation, unusual because of such an association, raises the question of the eventual existence of associated genes located on the chromosome 20 implied in the secretion of growth hormone and/or melanogenesis. It also underlines the interest of conducting cytogenic explorations on fibroblasts of damaged skin in the case of Ito-type pigmentary mosaicism, even if the blood karyotype is normal or in the absence of a patent phenotype abnormality.
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Affiliation(s)
- C Girard
- Service de Dermatologie, Hôpital Saint-Eloi, CHU Montpellier, France.
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15
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Ikeuchi T, Yang ZQ, Wakamatsu K, Kajii T. Induction of premature chromatid separation (PCS) in individuals with PCS trait and in normal controls. ACTA ACUST UNITED AC 2004; 127A:128-32. [PMID: 15108198 DOI: 10.1002/ajmg.a.20666] [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] [Indexed: 11/11/2022]
Abstract
Cultured peripheral blood lymphocytes from ten normal individuals, treated with 0.075 M KCl at 37 degrees C for 20 min, showed 0-2% cells in premature chromatid separation (PCS), a configuration with split centromeres and chromatids of most or all chromosomes. When treated for 30 min, they increased to 19% in the average, and at 45 min to 63%. Similar and significant effects of temperature and duration of hypotonic treatment on the frequencies of PCSs were found also in mitotic lymphocytes from patients with homozygous PCS trait, a cancer-prone disorder with >50% lymphocytes in PCS, mosaic variegated aneuploidy, and a variety of clinical manifestations; and from their heterozygous carrier parents. B lymphoblastoid cells from two infants with the homozygous PCS trait did not show PCSs when processed without hypotonic treatment. The frequencies of their PCSs increased with increasing temperature and duration of hypotonic treatment, attaining more than 65% after 20 min treatment and 90% after 45 min at 37 degrees C. PCS is thus likely to be induced largely by hypotonic treatment. Treatment at 37 degrees C for 20 min was found to be most suitable for the count of PCSs, in which the frequency of PCSs becomes almost zero in cells from normal individuals, and the difference in frequency of PCSs was most remarkable between the patients and heterozygous carriers, and between the heterozygous carriers and normal individuals. Chromosomes from the patients with the homozygous PCS trait tended to be long, and their PCSs tended to have a large number of widely separated sister chromatids. Chromosomes from normal individuals tended to be short, and the sister chromatids in their PCSs were set close to each other.
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Affiliation(s)
- Tatsuro Ikeuchi
- Department of Molecular Cytogenetics, Medical Research Institute, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan.
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Kajii T, Ikeuchi T. Premature chromatid separation (PCS) vs. premature centromere division (PCD). ACTA ACUST UNITED AC 2004; 126A:433-4. [PMID: 15098246 DOI: 10.1002/ajmg.a.20612] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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