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Zhang J, Han B, Zheng W, Lin S, Li H, Gao Y, Sun D. Genome-Wide DNA Methylation Profile in Jejunum Reveals the Potential Genes Associated With Paratuberculosis in Dairy Cattle. Front Genet 2021; 12:735147. [PMID: 34721525 PMCID: PMC8554095 DOI: 10.3389/fgene.2021.735147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 09/23/2021] [Indexed: 12/04/2022] Open
Abstract
Paratuberculosis in cattle causes substantial economic losses to the dairy industry. Exploring functional genes and corresponding regulatory pathways related to resistance or susceptibility to paratuberculosis is essential to the breeding of disease resistance in cattle. Co-analysis of genome-wide DNA methylation and transcriptome profiles is a critically important approach to understand potential regulatory mechanism underlying the development of diseases. In this study, we characterized the profiles of DNA methylation of jejunum from nine Holstein cows in clinical, subclinical, and healthy groups using whole-genome bisulfite sequencing (WGBS). The average methylation level in functional regions was 29.95% in the promoter, 29.65% in the 5’ untranslated region (UTR), 68.24% in exons, 71.55% in introns, and 72.81% in the 3’ UTR. A total of 3,911, 4,336, and 4,094 differentially methylated genes (DMGs) were detected in clinical vs. subclinical, clinical vs. healthy, and subclinical vs. healthy comparative group, respectively. Gene ontology (GO) and analysis based on the Kyoto Encyclopedia of Genes and Genomes (KEGG) showed that these DMGs were significantly enriched in specific biological processes related to immune response, such as Th1 and Th2 cell differentiation, wnt, TNF, MAPK, ECM-receptor interaction, cellular senescence, calcium, and chemokine signaling pathways (q value <0.05). The integration of information about DMGs, differentially expressed genes (DEGs), and biological functions suggested nine genes CALCRL, TNC, GATA4, CD44, TGM3, CXCL9, CXCL10, PPARG, and NFATC1 as promising candidates related to resistance/susceptibility to Mycobacterium avium subspecies paratuberculosis (MAP). This study reports on the high-resolution DNA methylation landscapes of the jejunum methylome across three conditions (clinical, subclinical, and healthy) in dairy cows. Our investigations integrated different sources of information about DMGs, DEGs, and pathways, enabling us to find nine functional genes that might have potential application in resisting paratuberculosis in dairy cattle.
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Affiliation(s)
- Junnan Zhang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Bo Han
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Weijie Zheng
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shan Lin
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Houcheng Li
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yahui Gao
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Dongxiao Sun
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Chen J, Xu J, Yu Y, Sun L. Case Report: A Novel Deletion in the 11p15 Region Causing a Familial Beckwith-Wiedemann Syndrome. Front Genet 2021; 12:621096. [PMID: 33679886 PMCID: PMC7933649 DOI: 10.3389/fgene.2021.621096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 01/18/2021] [Indexed: 11/28/2022] Open
Abstract
Beckwith–Wiedemann syndrome (BWS; OMIM 130650) is a human overgrowth and cancer susceptibility disorder with a wide clinical spectrum, which cannot be predicted based on genomic variants alone. Most reports on BWS cases focus on childhood patients. Studies on adult BWS patients are scarce. Our study reports a BWS family in which the disorder appears to be caused by deletion of H19 and its upstream regulatory elements. Genetic analysis showed a heterozygous microdeletion (~chr11:2009895-2070570 (GRCh37)) in the patients. Maternal deletion in H19 can result in loss of function of the IGF2-H19 imprinting control element, which leads to BWS. The male proband in this family was affected by the testicular anomaly and cryptorchidism. Early orchidopexy did not rescue his azoospermia, which might be not the consequence of cryptorchidism, but due to genetic defects associated with H19 deletion. In summary, our study gives some insights on the presentation of BWS in adulthood.
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Affiliation(s)
- Juan Chen
- Department of Assisted Reproductive Technology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Jian Xu
- Department of Assisted Reproductive Technology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yang Yu
- Department of Assisted Reproductive Technology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Ling Sun
- Department of Assisted Reproductive Technology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
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Pal A, Oakes J, Elnagheeb M, Ideraabdullah FY. Maternal Microdeletion at the H19/Igf2 ICR in Mice Increases Offspring Susceptibility to In Utero Environmental Perturbation. Epigenet Insights 2020; 13:2516865720970575. [PMID: 33313480 PMCID: PMC7716063 DOI: 10.1177/2516865720970575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Accepted: 10/09/2020] [Indexed: 12/01/2022] Open
Abstract
Deficiency of methyl donor nutrients folate, choline, and methionine (methyl deficiency) during gestation can impair fetal development and perturb DNA methylation. Here, we assessed genetic susceptibility to methyl deficiency by comparing effects in wildtype C57BL/6J (B6) mice to mutant mice carrying a 1.3 kb deletion at the H19/Igf2 Imprinting Control Region (ICR) (H19 ICRΔ2,3). The H19 ICRΔ2,3 mutation mimics microdeletions observed in Beckwith-Wiedemann syndrome (BWS) patients, who exhibit epimutations in cis that cause loss of imprinting and fetal overgrowth. Dams were treated during pregnancy with 1 of 4 methyl sufficient (MS) or methyl deficient (MD) diets, with or without the antibiotic commonly used to deplete folate producing gut microbes. As expected, after ~9 weeks of treatment, dams in MD and MD + antibiotic groups exhibited substantially reduced plasma folate concentrations. H19 ICRΔ2,3 mutant lines were more susceptible to adverse pregnancy outcomes caused by methyl deficiency (reduced birth rate and increased pup lethality) and antibiotic (decreased litter size and litter survival). Surprisingly, pup growth/development was only minimally affected by methyl deficiency, while antibiotic treatment caused inverse effects on B6 and H19 ICRΔ2,3 lines. B6 pups treated with antibiotic exhibited increased neonatal and weanling bodyweight, while both wildtype and mutant pups of heterozygous H19 ICRΔ2,3/+ dams exhibited decreased neonatal bodyweight that persisted into adulthood. Interestingly, only antibiotic-treated pups carrying the H19 ICRΔ2,3 mutation exhibited altered DNA methylation at the H19/Igf2 ICR, suggesting ICR epimutation was not sufficient to explain the altered phenotypes. These findings demonstrate that genetic mutation of the H19/Igf2 ICR increases offspring susceptibility to developmental perturbation in the methyl deficiency model, maternal and pup genotype play an essential role, and antibiotic treatment in the model also plays a key independent role.
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Affiliation(s)
- Anandita Pal
- Department of Nutrition, Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Judy Oakes
- Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC, USA
| | - Marwa Elnagheeb
- Department of Nutrition, Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC, USA
| | - Folami Y Ideraabdullah
- Department of Nutrition, Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Nutrition Research Institute, University of North Carolina at Chapel Hill, Kannapolis, NC, USA
- Department of Genetics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Chang S, Bartolomei MS. Modeling human epigenetic disorders in mice: Beckwith-Wiedemann syndrome and Silver-Russell syndrome. Dis Model Mech 2020; 13:dmm044123. [PMID: 32424032 PMCID: PMC7272347 DOI: 10.1242/dmm.044123] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Genomic imprinting, a phenomenon in which the two parental alleles are regulated differently, is observed in mammals, marsupials and a few other species, including seed-bearing plants. Dysregulation of genomic imprinting can cause developmental disorders such as Beckwith-Wiedemann syndrome (BWS) and Silver-Russell syndrome (SRS). In this Review, we discuss (1) how various (epi)genetic lesions lead to the dysregulation of clinically relevant imprinted loci, and (2) how such perturbations may contribute to the developmental defects in BWS and SRS. Given that the regulatory mechanisms of most imprinted clusters are well conserved between mice and humans, numerous mouse models of BWS and SRS have been generated. These mouse models are key to understanding how mutations at imprinted loci result in pathological phenotypes in humans, although there are some limitations. This Review focuses on how the biological findings obtained from innovative mouse models explain the clinical features of BWS and SRS.
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Affiliation(s)
- Suhee Chang
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Marisa S Bartolomei
- Epigenetics Institute, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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Akhtar MS, Akhter N, Najm MZ, Deo SVS, Shukla NK, Almalki SSR, Alharbi RA, Sindi AAA, Alruwetei A, Ahmad A, Husain SA. Association of mutation and low expression of the CTCF gene with breast cancer progression. Saudi Pharm J 2020; 28:607-614. [PMID: 32435142 PMCID: PMC7229322 DOI: 10.1016/j.jsps.2020.03.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 03/29/2020] [Indexed: 12/15/2022] Open
Abstract
Background CTCF encodes 11-zinc finger protein which is implicated in multiple tumors including the carcinoma of the breast. The Present study investigates the association of CTCF mutations and their expression in breast cancer cases. Methods A total of 155 breast cancer and an equal number of adjacent normal tissue samples from 155 breast cancer patients were examined for CTCF mutation(s) by PCR-SSCP and automated DNA sequencing. Immunohistochemistry (IHC) method was used to analyze CTCF expression. Molecular findings were statistically analyzed with various clinicopathological features to identify associations of clinical relevance. Results Of the total, 16.1% (25/155) cases exhibited mutation in the CTCF gene. Missense mutations Gln > His (G > T) in exon 1 and silent mutations Ser > Ser (C > T) in exon 4 of CTCF gene were analyzed. A significant association was observed between CTCF mutations and some clinicopathological parameters namely menopausal status (p = 0.02) tumor stage (p = 0.03) nodal status (p = 0.03) and ER expression (p = 0.04). Protein expression analysis showed 42.58% samples having low or no expression (+), 38.0% with moderate (++) expression and 19.35% having high (+++) expression for CTCF. A significant association was found between CTCF protein expression and clinicopathological parameters include histological grade (p = 0.04), tumor stage (p = 0.04), nodal status (p = 0.03) and ER status (p = 0.04). Conclusions The data suggest that CTCF mutations leading to its inactivation significantly contribute to the progression of breast cancer.
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Affiliation(s)
- Md Salman Akhtar
- Human Genetics Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.,Faculty of Applied Medical Sciences, Albaha University, Albaha, Saudi Arabia
| | - Naseem Akhter
- Human Genetics Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.,Faculty of Applied Medical Sciences, Albaha University, Albaha, Saudi Arabia
| | | | - S V S Deo
- Department of Surgical Oncology, DR. BRA-IRCH, AIIMS, New Delhi 110029, India
| | - N K Shukla
- Department of Surgical Oncology, DR. BRA-IRCH, AIIMS, New Delhi 110029, India
| | | | - Raed A Alharbi
- Faculty of Applied Medical Sciences, Albaha University, Albaha, Saudi Arabia
| | | | - Abdulmohsen Alruwetei
- Department of Medical Laboratory, College of Applied Medical Sciences, Qassim University, Qassim, Saudi Arabia
| | - Abrar Ahmad
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Syed Akhtar Husain
- Human Genetics Laboratory, Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
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Pinoli P, Stamoulakatou E, Nguyen AP, Rodríguez Martínez M, Ceri S. Pan-cancer analysis of somatic mutations and epigenetic alterations in insulated neighbourhood boundaries. PLoS One 2020; 15:e0227180. [PMID: 31945090 PMCID: PMC6964824 DOI: 10.1371/journal.pone.0227180] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 12/14/2019] [Indexed: 01/05/2023] Open
Abstract
Recent evidence shows that the disruption of constitutive insulated neighbourhoods might lead to oncogene dysregulation. We present here a systematic pan-cancer characterisation of the associations between constitutive boundaries and genome alterations in cancer. Specifically, we investigate the enrichment of somatic mutation, abnormal methylation, and copy number alteration events in the proximity of CTCF bindings overlapping with topological boundaries (junctions) in 26 cancer types. Focusing on CTCF motifs that are both in-boundary (overlapping with junctions) and active (overlapping with peaks of CTCF expression), we find a significant enrichment of somatic mutations in several cancer types. Furthermore, mutated junctions are significantly conserved across cancer types, and we also observe a positive selection of transversions rather than transitions in many cancer types. We also analyzed the mutational signature found on the different classes of CTCF motifs, finding some signatures (such as SBS26) to have a higher weight within in-boundary than off-bounday motifs. Regarding methylation, we find a significant number of over-methylated active in-boundary CTCF motifs in several cancer types; similarly to somatic-mutated junctions, they also have a significant conservation across cancer types. Finally, in several cancer types we observe that copy number alterations tend to overlap with active junctions more often than in matched normal samples. While several articles have recently reported a mutational enrichment at CTCF binding sites for specific cancer types, our analysis is pan-cancer and investigates abnormal methylation and copy number alterations in addition to somatic mutations. Our method is fully replicable and suggests several follow-up tumour-specific analyses.
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7
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The extent of DNA methylation anticipation due to a genetic defect in ICR1 in Beckwith-Wiedemann syndrome. J Hum Genet 2019; 64:937-943. [DOI: 10.1038/s10038-019-0634-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/02/2019] [Accepted: 06/09/2019] [Indexed: 11/08/2022]
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Anvar Z, Acurzio B, Roma J, Cerrato F, Verde G. Origins of DNA methylation defects in Wilms tumors. Cancer Lett 2019; 457:119-128. [PMID: 31103718 DOI: 10.1016/j.canlet.2019.05.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/10/2019] [Accepted: 05/13/2019] [Indexed: 12/14/2022]
Abstract
Wilms tumor is an embryonic renal cancer that typically presents in early childhood and accounts for 7% of all paediatric cancers. Different genetic alterations have been described in this malignancy, however, only a few of them are associated with a majority of Wilms tumors. Alterations in DNA methylation, in contrast, are frequent molecular defects observed in most cases of Wilms tumors. How these epimutations are established in this tumor is not yet completely clear. The recent identification of the molecular actors required for the epigenetic reprogramming during embryogenesis suggests novel possible mechanisms responsible for the DNA methylation defects in Wilms tumor. Here, we provide an overview of the DNA methylation alterations observed in this malignancy and discuss the distinct molecular mechanisms by which these epimutations can arise.
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Affiliation(s)
- Zahra Anvar
- Infertility Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Institute of Genetics and Biophysics 'A. Buzzati-Traverso', CNR, Naples, Italy
| | - Basilia Acurzio
- Institute of Genetics and Biophysics 'A. Buzzati-Traverso', CNR, Naples, Italy; Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania 'Luigi Vanvitelli', Caserta, Italy
| | - Josep Roma
- Vall d'Hebron Research Institute-Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Flavia Cerrato
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania 'Luigi Vanvitelli', Caserta, Italy
| | - Gaetano Verde
- Faculty of Medicine and Health Sciences, International University of Catalonia, Sant Cugat del Vallès, Barcelona, Spain.
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Abstract
CTCF, Zinc-finger protein, has been identified as a multifunctional transcription factor that regulates gene expression through various mechanisms, including recruitment of other co-activators and binding to promoter regions of target genes. Furthermore, it has been proposed to be an insulator protein that contributes to the establishment of functional three-dimensional chromatin structures. It can disrupt transcription through blocking the connection between an enhancer and a promoter. Previous studies revealed that the onset of various diseases, including breast cancer, could be attributed to the aberrant expression of CTCF itself or one or more of its target genes. In this review, we will describe molecular dysfunction involving CTCF that induces tumorigenesis and summarize the functional roles of CTCF in breast cancer.
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Affiliation(s)
- Sumin Oh
- Laboratory of Biomedical Genomics, Department of Biological Science, and Research Institute of Women's Health, Sookmyung Women's University, Seoul 04310, Korea
| | - Chaeun Oh
- Laboratory of Biomedical Genomics, Department of Biological Science, Sookmyung Women's University, Seoul 04310, Korea
| | - Kyung Hyun Yoo
- Laboratory of Biomedical Genomics, Department of Biological Science, Sookmyung Women's University, Seoul 04310, Korea
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10
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Brioude F, Kalish JM, Mussa A, Foster AC, Bliek J, Ferrero GB, Boonen SE, Cole T, Baker R, Bertoletti M, Cocchi G, Coze C, De Pellegrin M, Hussain K, Ibrahim A, Kilby MD, Krajewska-Walasek M, Kratz CP, Ladusans EJ, Lapunzina P, Le Bouc Y, Maas SM, Macdonald F, Õunap K, Peruzzi L, Rossignol S, Russo S, Shipster C, Skórka A, Tatton-Brown K, Tenorio J, Tortora C, Grønskov K, Netchine I, Hennekam RC, Prawitt D, Tümer Z, Eggermann T, Mackay DJG, Riccio A, Maher ER. Expert consensus document: Clinical and molecular diagnosis, screening and management of Beckwith-Wiedemann syndrome: an international consensus statement. Nat Rev Endocrinol 2018; 14:229-249. [PMID: 29377879 PMCID: PMC6022848 DOI: 10.1038/nrendo.2017.166] [Citation(s) in RCA: 314] [Impact Index Per Article: 52.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Beckwith-Wiedemann syndrome (BWS), a human genomic imprinting disorder, is characterized by phenotypic variability that might include overgrowth, macroglossia, abdominal wall defects, neonatal hypoglycaemia, lateralized overgrowth and predisposition to embryonal tumours. Delineation of the molecular defects within the imprinted 11p15.5 region can predict familial recurrence risks and the risk (and type) of embryonal tumour. Despite recent advances in knowledge, there is marked heterogeneity in clinical diagnostic criteria and care. As detailed in this Consensus Statement, an international consensus group agreed upon 72 recommendations for the clinical and molecular diagnosis and management of BWS, including comprehensive protocols for the molecular investigation, care and treatment of patients from the prenatal period to adulthood. The consensus recommendations apply to patients with Beckwith-Wiedemann spectrum (BWSp), covering classical BWS without a molecular diagnosis and BWS-related phenotypes with an 11p15.5 molecular anomaly. Although the consensus group recommends a tumour surveillance programme targeted by molecular subgroups, surveillance might differ according to the local health-care system (for example, in the United States), and the results of targeted and universal surveillance should be evaluated prospectively. International collaboration, including a prospective audit of the results of implementing these consensus recommendations, is required to expand the evidence base for the design of optimum care pathways.
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Affiliation(s)
- Frédéric Brioude
- Sorbonne Université, Pierre and Marie Curie-Paris VI University (UPMC) Université Paris 06, INSERM UMR_S938 Centre de Recherche Saint-Antoine (CRSA), APHP Hôpital Trousseau, Explorations Fonctionnelles Endocriniennes, 26 Avenue du Docteur Arnold Netter, F-75012 Paris, France
| | - Jennifer M Kalish
- Division of Human Genetics, Children's Hospital of Philadelphia and the Department of Pediatrics at the Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Alessandro Mussa
- Department of Public Health and Pediatric Sciences, University of Torino, Piazza Polonia 94, 10126 Torino, Italy
- Neonatal Intensive Care Unit, Department of Gynaecology and Obstetrics, Sant'Anna Hospital, Città della Salute e della Scienza di Torino, Corso Spezia 60, 10126 Torino, Italy
| | - Alison C Foster
- Birmingham Health Partners, West Midlands Regional Genetics Service, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham B15 2TG, UK
- Institute of Cancer and Genomic Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Jet Bliek
- Department of Clinical Genetics, Academic Medical Center, University of Amsterdam, PO Box 7057 1007 MB Amsterdam, The Netherlands
| | - Giovanni Battista Ferrero
- Department of Public Health and Pediatric Sciences, University of Torino, Piazza Polonia 94, 10126 Torino, Italy
| | - Susanne E Boonen
- Clinical Genetic Unit, Department of Pediatrics, Zealand University Hospital, Sygehusvej 10 4000 Roskilde, Denmark
| | - Trevor Cole
- Birmingham Health Partners, West Midlands Regional Genetics Service, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham B15 2TG, UK
| | - Robert Baker
- Beckwith-Wiedemann Support Group UK, The Drum and Monkey, Wonston, Hazelbury Bryan, Sturminster Newton, Dorset DT10 2EE, UK
| | - Monica Bertoletti
- Italian Association of Beckwith-Wiedemann syndrome (AIBWS) Piazza Turati, 3, 21029, Vergiate (VA), Italy
| | - Guido Cocchi
- Alma Mater Studiorum, Bologna University, Paediatric Department, Neonatology Unit, Via Massarenti 11, 40138 Bologna BO, Italy
| | - Carole Coze
- Aix-Marseille Univ et Assistance Publique Hôpitaux de Marseille (APHM), Hôpital d'Enfants de La Timone, Service d'Hématologie-Oncologie Pédiatrique, 264 Rue Saint Pierre, 13385 Marseille, France
| | - Maurizio De Pellegrin
- Pediatric Orthopaedic Unit IRCCS Ospedale San Raffaele, Milan, Via Olgettina Milano, 60, 20132 Milano MI, Italy
| | - Khalid Hussain
- Department of Paediatric Medicine, Division of Endocrinology, Sidra Medical and Research Center, Al Gharrafa Street, Ar-Rayyan, Doha, Qatar
| | - Abdulla Ibrahim
- Department of Plastic and Reconstructive Surgery, North Bristol National Health Service (NHS) Trust, Southmead Hospital, Bristol BS10 5NB, UK
| | - Mark D Kilby
- Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, B15 2TT, UK
- Fetal Medicine Centre, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Edgbaston, Birmingham, B15 2TG, UK
| | | | - Christian P Kratz
- Pediatric Hematology and Oncology, Hannover Medical School, Carl-Neuberg-Strasse 1 30625, Hannover, Germany
| | - Edmund J Ladusans
- Department of Paediatric Cardiology, Royal Manchester Children's Hospital, Manchester, M13 8WL UK
| | - Pablo Lapunzina
- Instituto de Genética Médica y Molecular (INGEMM)-IdiPAZ, Hospital Universitario La Paz-UAM Paseo de La Castellana, 261, 28046, Madrid, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Calle de Melchor Fernández Almagro, 3, 28029, Madrid, Spain
| | - Yves Le Bouc
- Sorbonne Université, Pierre and Marie Curie-Paris VI University (UPMC) Université Paris 06, INSERM UMR_S938 Centre de Recherche Saint-Antoine (CRSA), APHP Hôpital Trousseau, Explorations Fonctionnelles Endocriniennes, 26 Avenue du Docteur Arnold Netter, F-75012 Paris, France
| | - Saskia M Maas
- Department of Clinical Genetics, Academic Medical Center, University of Amsterdam, PO Box 7057 1007 MB Amsterdam, The Netherlands
| | - Fiona Macdonald
- West Midlands Regional Genetics Laboratory, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, B15 2TG UK
| | - Katrin Õunap
- Department of Clinical Genetics, United Laboratories, Tartu University Hospital and Department of Clinical Genetics, Institute of Clinical Medicine, University of Tartu, L. Puusepa 2, 51014, Tartu, Estonia
| | - Licia Peruzzi
- European Society for Paediatric Nephrology (ESPN), Inherited Kidney Disorders Working Group
- AOU Città della Salute e della Scienza di Torino, Regina Margherita Children's Hospital, Turin, Italy
| | - Sylvie Rossignol
- Service de Pédiatrie, Hôpitaux Universitaires de Strasbourg, Laboratoire de Génétique Médicale, INSERM U1112 Avenue Molière 67098 STRASBOURG Cedex, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, 4 Rue Kirschleger, 67000 Strasbourg, France
| | - Silvia Russo
- Medical Cytogenetics and Molecular Genetics Laboratory, Centro di Ricerche e Tecnologie Biomediche IRCCS, Istituto Auxologico Italiano, Via Zucchi 18, 20095 Cusano, Milan, Italy
| | - Caroleen Shipster
- Great Ormond Street Hospital for Children National Health Service (NHS) Foundation Trust, London, WC1N 3JH, UK
| | - Agata Skórka
- Department of Medical Genetics, The Children's Memorial Health Institute, 20, 04-730, Warsaw, Poland
- Department of Pediatrics, The Medical University of Warsaw, Zwirki i Wigury 63a, 02-091 Warszawa, Poland
| | - Katrina Tatton-Brown
- South West Thames Regional Genetics Service and St George's University of London and Institute of Cancer Research, London, SW17 0RE, UK
| | - Jair Tenorio
- Instituto de Genética Médica y Molecular (INGEMM)-IdiPAZ, Hospital Universitario La Paz-UAM Paseo de La Castellana, 261, 28046, Madrid, Spain
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Calle de Melchor Fernández Almagro, 3, 28029, Madrid, Spain
| | - Chiara Tortora
- Regional Center for CLP, Smile House, San Paolo University Hospital, Via Antonio di Rudinì, 8, 20142, Milan, Italy
| | - Karen Grønskov
- Kennedy Center, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Irène Netchine
- Sorbonne Université, Pierre and Marie Curie-Paris VI University (UPMC) Université Paris 06, INSERM UMR_S938 Centre de Recherche Saint-Antoine (CRSA), APHP Hôpital Trousseau, Explorations Fonctionnelles Endocriniennes, 26 Avenue du Docteur Arnold Netter, F-75012 Paris, France
| | - Raoul C Hennekam
- Department of Pediatrics, Emma Children's Hospital, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam-Zuidoost, Amsterdam, The Netherlands
| | - Dirk Prawitt
- Center for Pediatrics and Adolescent Medicine, Johannes Gutenberg University Medical Center, Langenbeckstr. 1, D-55101, Mainz, Germany
| | - Zeynep Tümer
- Kennedy Center, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Thomas Eggermann
- Institute of Human Genetics, University Hospital, Technical University of Aachen, Templergraben 55, 52062, Aachen, Germany
| | - Deborah J G Mackay
- Human Development and Health, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, UK
| | - Andrea Riccio
- Department of Environmental, Biological, and Pharmaceutical Sciences and Technologies (DiSTABiF), University of Campania Luigi Vanvitelli, Caserta and Institute of Genetics and Biophysics "A. Buzzati-Traverso" - CNR, Via Pietro Castellino, 111,80131, Naples, Italy
| | - Eamonn R Maher
- Department of Medical Genetics, University of Cambridge and National Institute for Health Research (NIHR) Cambridge Biomedical Research Centre and Cancer Research UK Cambridge Centre, Cambridge Biomedical Campus, Cambridge, CB2 0QQ, UK
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11
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Freschi A, Hur SK, Valente FM, Ideraabdullah FY, Sparago A, Gentile MT, Oneglia A, Di Nucci D, Colucci-D'Amato L, Thorvaldsen JL, Bartolomei MS, Riccio A, Cerrato F. Tissue-specific and mosaic imprinting defects underlie opposite congenital growth disorders in mice. PLoS Genet 2018; 14:e1007243. [PMID: 29470501 PMCID: PMC5839592 DOI: 10.1371/journal.pgen.1007243] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 03/06/2018] [Accepted: 02/05/2018] [Indexed: 11/18/2022] Open
Abstract
Differential DNA methylation defects of H19/IGF2 are associated with congenital growth disorders characterized by opposite clinical pictures. Due to structural differences between human and mouse, the mechanisms by which mutations of the H19/IGF2 Imprinting Control region (IC1) result in these diseases are undefined. To address this issue, we previously generated a mouse line carrying a humanized IC1 (hIC1) and now replaced the wildtype with a mutant IC1 identified in the overgrowth-associated Beckwith-Wiedemann syndrome. The new humanized mouse line shows pre/post-natal overgrowth on maternal transmission and pre/post-natal undergrowth on paternal transmission of the mutation. The mutant hIC1 acquires abnormal methylation during development causing opposite H19/Igf2 imprinting defects on maternal and paternal chromosomes. Differential and possibly mosaic Igf2 expression and imprinting is associated with asymmetric growth of bilateral organs. Furthermore, tissue-specific imprinting defects result in deficient liver- and placenta-derived Igf2 on paternal transmission and excessive Igf2 in peripheral tissues on maternal transmission, providing a possible molecular explanation for imprinting-associated and phenotypically contrasting growth disorders.
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Affiliation(s)
- Andrea Freschi
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy
| | - Stella K Hur
- Epigenetics Institute, Department of Cell & Developmental Biology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Federica Maria Valente
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy
| | - Folami Y Ideraabdullah
- Department of Genetics, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, United States of America.,Department of Nutrition, Gillings School of Public Health, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Angela Sparago
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy
| | - Maria Teresa Gentile
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy
| | - Andrea Oneglia
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy.,Institute of Genetics and Biophysics, "Adriano Buzzati Traverso" - CNR, Naples, Italy
| | - Diego Di Nucci
- Department of Experimental Medicine, University of Campania, "Luigi Vanvitelli", Naples, Italy
| | - Luca Colucci-D'Amato
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy
| | - Joanne L Thorvaldsen
- Epigenetics Institute, Department of Cell & Developmental Biology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Marisa S Bartolomei
- Epigenetics Institute, Department of Cell & Developmental Biology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Andrea Riccio
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy.,Institute of Genetics and Biophysics, "Adriano Buzzati Traverso" - CNR, Naples, Italy
| | - Flavia Cerrato
- Department of Environmental Technologies, Biological and Pharmaceutical Sciences, University of Campania, "Luigi Vanvitelli", Naples, Italy
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12
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Is ZFP57 binding to H19/IGF2:IG-DMR affected in Silver-Russell syndrome? Clin Epigenetics 2018; 10:23. [PMID: 29484033 PMCID: PMC5822596 DOI: 10.1186/s13148-018-0454-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 02/02/2018] [Indexed: 01/21/2023] Open
Abstract
Background Loss of paternal methylation (LOM) of the H19/IGF2 intergenic differentially methylated region (H19/IGF2:IG-DMR) causes alteration of H19/IGF2 imprinting and Silver-Russell syndrome (SRS). Recently, internal deletions of the H19/IGF2:IG-DMR have been associated with LOM and SRS when present on the paternal chromosome. In contrast, previously described deletions, most of which cause gain of methylation (GOM) and Beckwith-Wiedemann syndrome (BWS) on maternal transmission, were consistently associated with normal methylation and phenotype if paternally inherited. Presentation of the hypothesis The presence of several target sites (ZTSs) and three demonstrated binding regions (BRs) for the imprinting factor ZFP57 in the H19/IGF2:IG-DMR suggest the involvement of this factor in the maintenance of methylation of this locus. By comparing the extension of the H19/IGF2:IG-DMR deletions with the binding profile of ZFP57, we propose that the effect of the deletions on DNA methylation and clinical phenotype is dependent on their interference with ZFP57 binding. Indeed, deletions strongly affecting a ZFP57 BR result in LOM and SRS, while deletions preserving a significant number of ZFPs in each BR do not alter methylation and are associated with normal phenotype. Testing the hypothesis The generation of transgenic mouse lines in which the endogenous H19/IGF2:IG-DMR is replaced by the human orthologous locus including the three ZFP57 BRs or their mutant versions will allow to test the role of ZFP57 binding in imprinted methylation and growth phenotype. Implications of the hypothesis Similarly to what is proposed for maternally inherited BWS mutations and CTCF and OCT4/SOX2 binding, we suggest that deletions of the H19/IGF2:IG-DMR result in SRS with LOM if ZFP57 binding on the paternal chromosome is affected. Electronic supplementary material The online version of this article (10.1186/s13148-018-0454-7) contains supplementary material, which is available to authorized users.
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13
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Zhao L, Yang Y, Yin S, Yang T, Luo J, Xie R, Long H, Jiang L, Zhu B. CTCF promotes epithelial ovarian cancer metastasis by broadly controlling the expression of metastasis-associated genes. Oncotarget 2017; 8:62217-62230. [PMID: 28977939 PMCID: PMC5617499 DOI: 10.18632/oncotarget.19216] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Accepted: 04/17/2017] [Indexed: 01/17/2023] Open
Abstract
CCCTC-binding factor (CTCF) functions as both an oncogenic and a tumor suppressor, depending on the cancer type, through epigenetic regulation. Epigenetic regulation plays a key role in cancer metastasis. Our objective was to investigate whether CTCF plays a crucial role in epithelial ovarian cancer metastasis. First, we found that CTCF expression was increased in ovarian cancer tissues compared to non-tumor tissues. Increased expression of CTCF predicts poor prognosis of ovarian cancer patients. In addition, CTCF knockdown significantly inhibited the metastasis of ovarian cancer cells, although it had no effect on cell proliferation and tumor growth. More importantly, CTCF expression was higher in metastatic lesions compared to primary tumors from the same ovarian cancer patients. We also demonstrated that CTCF affects a number of metastasis-associated genes, including CTBP1, SERPINE1 and SRC. Additionally, our ChIP-seq results revealed that these genes have multiple CTCF-binding sites, findings that were further confirmed by ChIP-PCR. Our results suggest that CTCF could be a novel drug target to treat ovarian cancer by interfering with cancer cell metastasis.
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Affiliation(s)
- Lintao Zhao
- Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, China.,Institute of Cancer, PLA 324 Hospital, Chongqing, China
| | - Yang Yang
- Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Shigang Yin
- Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Tao Yang
- Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Jing Luo
- Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Rongkai Xie
- Department of Obstetrics and Gynecology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Haixia Long
- Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, China
| | - Lubin Jiang
- Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Bo Zhu
- Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing, China
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14
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Bastaki F, Nair P, Mohamed M, Malik EM, Helmi M, Al-Ali MT, Hamzeh AR. Identification of a novel CTCF mutation responsible for syndromic intellectual disability - a case report. BMC MEDICAL GENETICS 2017; 18:68. [PMID: 28619046 PMCID: PMC5472882 DOI: 10.1186/s12881-017-0429-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 05/28/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND Autosomal dominant mental retardation 21 (MRD21) is a very rare condition, characterized by short stature, microcephaly, mild facial dysmorphisms and intellectual disability that ranged from mild to severe. MRD21 is caused by mutations in CCCTC-binding factor (CTCF) and this was established through only four unrelated cases, two of which had frameshift mutations. CTCF is a master transcriptional regulator that controls chromatin structure and may serve as insulator and transcriptional activator and repressor. CASE PRESENTATION This study presents, clinically and molecularly, an Emirati patient with de novo frameshift mutation in CTCF. This novel mutation was uncovered using whole exome sequencing and was confirmed by Sanger sequencing in the trio. In silico analysis, using SIFT Indel, indicates that this frameshift; p.Lys206Profs*13 is functionally damaging with the likely involvement of nonsense-mediated mRNA decay. CONCLUSIONS Upon comparing the clinical picture of the herewith-reported individual with previously reported cases of MRD21, there seems to be many common symptoms, and few new ones that were not observed before. This helps to further define this rare condition and its molecular underpinnings.
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Affiliation(s)
- Fatma Bastaki
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, United Arab Emirates
| | - Pratibha Nair
- Centre for Arab Genomic Studies, P.O. Box 22252, Dubai, United Arab Emirates
| | - Madiha Mohamed
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, United Arab Emirates
| | - Ethar Mustafa Malik
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, United Arab Emirates
| | - Mustafa Helmi
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, United Arab Emirates
| | | | - Abdul Rezzak Hamzeh
- Centre for Arab Genomic Studies, P.O. Box 22252, Dubai, United Arab Emirates.
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15
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Bachmann N, Crazzolara R, Bohne F, Kotzot D, Maurer K, Enklaar T, Prawitt D, Bergmann C. Novel deletion in 11p15.5 imprinting center region 1 in a patient with Beckwith-Wiedemann syndrome provides insight into distal enhancer regulation and tumorigenesis. Pediatr Blood Cancer 2017; 64. [PMID: 27650505 DOI: 10.1002/pbc.26241] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 07/23/2016] [Accepted: 08/01/2016] [Indexed: 11/07/2022]
Abstract
BACKGROUND Beckwith-Wiedemann syndrome (BWS) is an early-onset overgrowth disorder with a high risk for embryonal tumors. It is mainly caused by dysregulation of imprinted genes on chromosome 11p15.5; however, the driving forces in the development of tumors are not fully understood. PROCEDURE We report on a female patient presenting with macrosomia, macroglossia, organomegaly and extensive bilateral nephroblastomatosis. Adjuvant chemotherapy was initiated; however, the patient developed hepatoblastoma and Wilms tumor at 5 and 12 months of age, respectively. Subsequent radiofrequency ablation of the liver tumor and partial nephrectomy followed by consolidation therapy achieved complete remission. RESULTS Molecular genetic analysis revealed a maternally derived large deletion of the complete H19-differentially methylated region (H19-DMR; imprinting control region-1 [ICR1]), the whole H19 gene itself as well as large parts of the distal enhancer region within the imprinting cluster-1 (IC1). Extended analysis showed highly elevated insulin-like growth factor 2 (IGF2) expression, possibly explaining at least in part the distinct BWS features and tumor manifestations. CONCLUSIONS This study of a large maternal deletion encompassing the H19 gene and complete ICR1 is the first to demonstrate transcriptional consequences on IGF2 in addition to methylation effects resulting in severe overgrowth and occurrence of multiple tumors in a BWS patient. Studying this deletion helps to clarify the complex molecular processes involved in BWS and provides further insight into tumorigenesis.
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Affiliation(s)
| | - Roman Crazzolara
- Department for Pediatrics, Medical University Innsbruck, Innsbruck, Austria.,Tyrolean Cancer Research Institute, Innsbruck, Austria
| | - Florian Bohne
- Center for Pediatrics and Adolescent Medicine, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Dieter Kotzot
- Division of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Kathrin Maurer
- Department for Pediatrics, Medical University Innsbruck, Innsbruck, Austria
| | - Thorsten Enklaar
- Center for Pediatrics and Adolescent Medicine, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Dirk Prawitt
- Center for Pediatrics and Adolescent Medicine, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Carsten Bergmann
- Center for Human Genetics, Bioscientia, Ingelheim, Germany.,Department of Medicine, University Hospital Freiburg, Freiburg, Germany
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16
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lncRNA H19/miR-675 axis regulates cardiomyocyte apoptosis by targeting VDAC1 in diabetic cardiomyopathy. Sci Rep 2016; 6:36340. [PMID: 27796346 PMCID: PMC5087087 DOI: 10.1038/srep36340] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 10/14/2016] [Indexed: 01/22/2023] Open
Abstract
We previously established a rat model of diabetic cardiomyopathy (DCM) and found that the expression of lncRNA H19 was significantly downregulated. The present study was designed to investigate the pathogenic role of H19 in the development of DCM. Overexpression of H19 in diabetic rats attenuated oxidative stress, inflammation and apoptosis, and consequently improved left ventricular function. High glucose was associated with reduced H19 expression and increased cardiomyocyte apoptosis. To explore the molecular mechanisms involved, we performed in vitro experiments using cultured neonatal rat cardiomyocytes. Our results showed that miR-675 expression was decreased in cardiomyocytes transfected with H19 siRNA. The 3′UTR of VDAC1 was cloned downstream of a luciferase reporter construct and cotransfected into HEK293 cells with miR-675 mimic. The results of luciferase assay indicated that VDAC1 might be a direct target of miR-675. The expression of VDAC1 was upregulated in cardiomyocytes transfected with miR-675 antagomir, which consequently promotes cellular apoptosis. Moreover, enforced expression of H19 was found to reduce VDAC1 expression and inhibit apoptosis in cardiomyocytes exposed to high glucose. In conclusion, our study demonstrates that H19/miR-675 axis is involved in the regulation of high glucose-induced apoptosis by targeting VDAC1, which may provide a novel therapeutic strategy for the treatment of DCM.
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17
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Õunap K. Silver-Russell Syndrome and Beckwith-Wiedemann Syndrome: Opposite Phenotypes with Heterogeneous Molecular Etiology. Mol Syndromol 2016; 7:110-21. [PMID: 27587987 DOI: 10.1159/000447413] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2016] [Indexed: 12/13/2022] Open
Abstract
Silver-Russell syndrome (SRS) and Beckwith-Wiedemann syndrome (BWS) are 2 clinically opposite growth-affecting disorders belonging to the group of congenital imprinting disorders. The expression of both syndromes usually depends on the parental origin of the chromosome in which the imprinted genes reside. SRS is characterized by severe intrauterine and postnatal growth retardation with various additional clinical features such as hemihypertrophy, relative macrocephaly, fifth finger clinodactyly, and triangular facies. BWS is an overgrowth syndrome with many additional clinical features such as macroglossia, organomegaly, and an increased risk of childhood tumors. Both SRS and BWS are clinically and genetically heterogeneous, and for clinical diagnosis, different diagnostic scoring systems have been developed. Six diagnostic scoring systems for SRS and 4 for BWS have been previously published. However, neither syndrome has common consensus diagnostic criteria yet. Most cases of SRS and BWS are associated with opposite epigenetic or genetic abnormalities in the 11p15 chromosomal region leading to opposite imbalances in the expression of imprinted genes. SRS is also caused by maternal uniparental disomy 7, which is usually identified in 5-10% of the cases, and is therefore the first imprinting disorder that affects 2 different chromosomes. In this review, we describe in detail the clinical diagnostic criteria and scoring systems as well as molecular causes in both SRS and BWS.
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Affiliation(s)
- Katrin Õunap
- Department of Genetics, United Laboratories, Tartu University Hospital, and Department of Pediatrics, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
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18
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Denomme MM, McCallie BR, Parks JC, Schoolcraft WB, Katz-Jaffe MG. Epigenetic Dysregulation Observed in Monosomy Blastocysts Further Compromises Developmental Potential. PLoS One 2016; 11:e0156980. [PMID: 27271036 PMCID: PMC4896457 DOI: 10.1371/journal.pone.0156980] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 05/23/2016] [Indexed: 01/23/2023] Open
Abstract
Epigenetic mechanisms such as DNA methylation regulate genomic imprinting and account for the distinct non-equivalence of the parental genomes in the embryo. Chromosomal aneuploidy, a major cause of infertility, distorts this highly regulated disparity by the presence or absence of chromosomes. The implantation potential of monosomy embryos is negligible compared to their trisomy counterparts, yet the cause for this is unknown. This study investigated the impact of chromosomal aneuploidy on strict epigenetically regulated domains, specifically imprinting control regions present on aneuploid chromosomes. Donated cryopreserved human IVF blastocysts of transferable quality, including trisomy 15, trisomy 11, monosomy 15, monosomy 11, and donor oocyte control blastocysts were examined individually for DNA methylation profiles by bisulfite mutagenesis and sequencing analysis of two maternally methylated imprinting control regions (ICRs), SNRPN (15q11.2) and KCNQ1OT1 (11p15.5), and one paternally methylated imprinting control region, H19 (11p15.5). Imprinted genes within the regions were also evaluated for transcript abundance by RT-qPCR. Overall, statistically significant hypermethylated and hypomethylated ICRs were found in both the trisomy and monosomy blastocysts compared to controls, restricted only to the chromosome affected by the aneuploidy. Increased expression was observed for maternally-expressed imprinted genes in trisomy blastocysts, while a decreased expression was observed for both maternally- and paternally-expressed imprinted genes in monosomy blastocysts. This epigenetic dysregulation and altered monoallelic expression observed at imprinting control regions in aneuploid IVF embryos supports euploid embryo transfer during infertility treatments, and may specifically highlight an explanation for the compromised implantation potential in monosomy embryos.
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Affiliation(s)
| | - Blair R. McCallie
- Fertility Labs of Colorado, Lone Tree, Colorado, United States of America
| | - Jason C. Parks
- Fertility Labs of Colorado, Lone Tree, Colorado, United States of America
| | - William B. Schoolcraft
- Colorado Center for Reproductive Medicine, Lone Tree, Colorado, United States of America
| | - Mandy G. Katz-Jaffe
- Fertility Labs of Colorado, Lone Tree, Colorado, United States of America
- Colorado Center for Reproductive Medicine, Lone Tree, Colorado, United States of America
- * E-mail:
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19
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Steiner LA, Schulz V, Makismova Y, Lezon-Geyda K, Gallagher PG. CTCF and CohesinSA-1 Mark Active Promoters and Boundaries of Repressive Chromatin Domains in Primary Human Erythroid Cells. PLoS One 2016; 11:e0155378. [PMID: 27219007 PMCID: PMC4878738 DOI: 10.1371/journal.pone.0155378] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 04/27/2016] [Indexed: 01/20/2023] Open
Abstract
Background CTCF and cohesinSA-1 are regulatory proteins involved in a number of critical cellular processes including transcription, maintenance of chromatin domain architecture, and insulator function. To assess changes in the CTCF and cohesinSA-1 interactomes during erythropoiesis, chromatin immunoprecipitation coupled with high throughput sequencing and mRNA transcriptome analyses via RNA-seq were performed in primary human hematopoietic stem and progenitor cells (HSPC) and primary human erythroid cells from single donors. Results Sites of CTCF and cohesinSA-1 co-occupancy were enriched in gene promoters in HSPC and erythroid cells compared to single CTCF or cohesin sites. Cell type-specific CTCF sites in erythroid cells were linked to highly expressed genes, with the opposite pattern observed in HSPCs. Chromatin domains were identified by ChIP-seq with antibodies against trimethylated lysine 27 histone H3, a modification associated with repressive chromatin. Repressive chromatin domains increased in both number and size during hematopoiesis, with many more repressive domains in erythroid cells than HSPCs. CTCF and cohesinSA-1 marked the boundaries of these repressive chromatin domains in a cell-type specific manner. Conclusion These genome wide data, changes in sites of protein occupancy, chromatin architecture, and related gene expression, support the hypothesis that CTCF and cohesinSA-1 have multiple roles in the regulation of gene expression during erythropoiesis including transcriptional regulation at gene promoters and maintenance of chromatin architecture. These data from primary human erythroid cells provide a resource for studies of normal and perturbed erythropoiesis.
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Affiliation(s)
- Laurie A Steiner
- Department of Pediatrics, University of Rochester, Rochester, New York, United States of America
| | - Vincent Schulz
- Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Yelena Makismova
- Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Kimberly Lezon-Geyda
- Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Patrick G Gallagher
- Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut, United States of America.,Departments of Pathology and Genetics, Yale University School of Medicine, New Haven, Connecticut, United States of America
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20
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Bohne F, Langer D, Martiné U, Eider CS, Cencic R, Begemann M, Elbracht M, Bülow L, Eggermann T, Zechner U, Pelletier J, Zabel BU, Enklaar T, Prawitt D. Kaiso mediates human ICR1 methylation maintenance and H19 transcriptional fine regulation. Clin Epigenetics 2016; 8:47. [PMID: 27152123 PMCID: PMC4857248 DOI: 10.1186/s13148-016-0215-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/26/2016] [Indexed: 11/21/2022] Open
Abstract
Background Genomic imprinting evolved in a common ancestor to marsupials and eutherian mammals and ensured the transcription of developmentally important genes from defined parental alleles. The regulation of imprinted genes is often mediated by differentially methylated imprinting control regions (ICRs) that are bound by different proteins in an allele-specific manner, thus forming unique chromatin loops regulating enhancer-promoter interactions. Factors that maintain the allele-specific methylation therefore are essential for the proper transcriptional regulation of imprinted genes. Binding of CCCTC-binding factor (CTCF) to the IGF2/H19-ICR1 is thought to be the key regulator of maternal ICR1 function. Disturbances of the allele-specific CTCF binding are causative for imprinting disorders like the Silver-Russell syndrome (SRS) or the Beckwith-Wiedemann syndrome (BWS), the latter one being associated with a dramatically increased risk to develop nephroblastomas. Methods Kaiso binding to the human ICR1 was detected and analyzed by chromatin immunoprecipitation (ChIP) and electrophoretic mobility shift assays (EMSA). The role of Kaiso-ICR1 binding on DNA methylation was tested by lentiviral Kaiso knockdown and CRISPR/Cas9 mediated editing of a Kaiso binding site. Results We find that another protein, Kaiso (ZBTB33), characterized as binding to methylated CpG repeats as well as to unmethylated consensus sequences, specifically binds to the human ICR1 and its unmethylated Kaiso binding site (KBS) within the ICR1. Depletion of Kaiso transcription as well as deletion of the ICR1-KBS by CRISPR/Cas9 genome editing results in reduced methylation of the paternal ICR1. Additionally, Kaiso affects transcription of the lncRNA H19 and specifies a role for ICR1 in the transcriptional regulation of this imprinted gene. Conclusions Kaiso binding to unmethylated KBS in the human ICR1 is necessary for ICR1 methylation maintenance and affects transcription rates of the lncRNA H19. Electronic supplementary material The online version of this article (doi:10.1186/s13148-016-0215-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Florian Bohne
- Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany
| | - David Langer
- Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany
| | - Ursula Martiné
- Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany
| | - Claudia S Eider
- Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany
| | - Regina Cencic
- Department of Biochemistry and the Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3G 1Y6 Canada
| | - Matthias Begemann
- Institute of Human Genetics, RWTH Aachen University, Pauwelsstr. 30, 52074 Aachen, Germany
| | - Miriam Elbracht
- Institute of Human Genetics, RWTH Aachen University, Pauwelsstr. 30, 52074 Aachen, Germany
| | - Luzie Bülow
- Institute of Human Genetics, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany
| | - Thomas Eggermann
- Institute of Human Genetics, RWTH Aachen University, Pauwelsstr. 30, 52074 Aachen, Germany
| | - Ulrich Zechner
- Institute of Human Genetics, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany
| | - Jerry Pelletier
- Department of Biochemistry and the Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montreal, Quebec H3G 1Y6 Canada
| | - Bernhard Ulrich Zabel
- Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Mathildenstr. 1, 79106 Freiburg, Germany
| | - Thorsten Enklaar
- Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany
| | - Dirk Prawitt
- Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Langenbeckstr. 1, 55101 Mainz, Germany.,Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Obere Zahlbacher Str. 63, 55131 Mainz, Germany
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21
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Noncoding RNAs in Tumor Epithelial-to-Mesenchymal Transition. Stem Cells Int 2016; 2016:2732705. [PMID: 26989421 PMCID: PMC4773551 DOI: 10.1155/2016/2732705] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 01/20/2016] [Indexed: 12/21/2022] Open
Abstract
Epithelial-derived tumor cells acquire the capacity for epithelial-to-mesenchymal transition (EMT), which enables them to invade adjacent tissues and/or metastasize to distant organs. Cancer metastasis is the main cause of cancer-related death. Molecular mechanisms involved in the switch from an epithelial phenotype to mesenchymal status are complicated and are controlled by a variety of signaling pathways. Recently, a set of noncoding RNAs (ncRNAs), including miRNAs and long noncoding RNAs (lncRNAs), were found to modulate gene expressions at either transcriptional or posttranscriptional levels. These ncRNAs are involved in EMT through their interplay with EMT-related transcription factors (EMT-TFs) and EMT-associated signaling. Reciprocal regulatory interactions between lncRNAs and miRNAs further increase the complexity of the regulation of gene expression and protein translation. In this review, we discuss recent findings regarding EMT-regulating ncRNAs and their associated signaling pathways involved in cancer progression.
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Abstract
Genetic causes for human disorders are being discovered at an unprecedented pace. A growing subclass of disease-causing mutations involves changes in the epigenome or in the abundance and activity of proteins that regulate chromatin structure. This article focuses on research that has uncovered human diseases that stem from such epigenetic deregulation. Disease may be caused by direct changes in epigenetic marks, such as DNA methylation, commonly found to affect imprinted gene regulation. Also described are disease-causing genetic mutations in epigenetic modifiers that either affect chromatin in trans or have a cis effect in altering chromatin configuration.
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Affiliation(s)
- Huda Y Zoghbi
- Howard Hughes Medical Institute, Baylor College of Medicine, and Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, Texas 77030 Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030
| | - Arthur L Beaudet
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030
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Zaman R, Maggi A, Rajpoot SK, Joshi DD. Glomerulocystic Kidney Disease and Hepatoblastoma in an Infant: A Rare Presentation. Case Rep Nephrol Dial 2015; 5:200-3. [PMID: 26688803 PMCID: PMC4677724 DOI: 10.1159/000439520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Glomerulocystic kidney disease (GCKD) is a rare condition comprising heritable and non-heritable types [Oh et al.: Nephron 1986;43:299–302]. Hepatoblastoma is a sporadically occurring tumor of embryonal origin that is associated with overgrowth syndrome and renal cysts. A concurrent presentation of GCKD with hepatoblastoma was first described in 1989 [Rao et al.: Jpn J Surg 1989;19:583–585]. We report the simultaneous presentation of hepatoblastoma and GCKD in a 5-month-old child and explore the probability of insulin-like growth factors, insulin-like growth factor-binding protein and Beckwith-Wiedemann gene mutation as a putative cause.
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Affiliation(s)
- Rumina Zaman
- Miller Children's and Women's Hospital, Long Beach, Calif., USA
| | - Alec Maggi
- Drexler University, Philadelphia, Pa., USA
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Mussa A, Russo S, Larizza L, Riccio A, Ferrero GB. (Epi)genotype-phenotype correlations in Beckwith-Wiedemann syndrome: a paradigm for genomic medicine. Clin Genet 2015; 89:403-415. [PMID: 26138266 DOI: 10.1111/cge.12635] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 06/24/2015] [Accepted: 06/30/2015] [Indexed: 12/23/2022]
Abstract
Beckwith-Wiedemann syndrome (BWS) is the commonest overgrowth cancer predisposition disorder and represents a model for human imprinting dysregulation and tumorigenesis. BWS features can variably combine and present a widely variable range of severity in the phenotypic expression. This wide spectrum is paralleled at molecular level by complex (epi)genetic defects on chromosome 11p15.5 leading to disrupted expression of imprinted genes controlling growth and cellular proliferation. In this review, we outline the spectrum of clinical manifestations of BWS analyzing their (epi)genotype-phenotype correlations. The differences observed in the phenotypic profiles of BWS molecular subtypes allow a composite view of this syndrome with implications on clinical care, diagnosis, follow-up, and management, and provide directions for future disease monitoring.
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Affiliation(s)
- A Mussa
- Department of Pediatrics and Public Health Sciences, University of Torino, Torino, Italy
| | - S Russo
- Laboratory of Cytogenetics and Molecular Genetics, Istituto Auxologico Italiano, Milan, Italy
| | - L Larizza
- Laboratory of Cytogenetics and Molecular Genetics, Istituto Auxologico Italiano, Milan, Italy.,Department of Health Sciences, University of Milan, Milan, Italy
| | - A Riccio
- DiSTABiF, Second University of Naples, Napoli, Italy.,Institute of Genetics and Biophysics "A. Buzzati-Traverso" - CNR, Naples, Italy
| | - G B Ferrero
- Department of Pediatrics and Public Health Sciences, University of Torino, Torino, Italy
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25
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A novel large deletion of the ICR1 region including H19 and putative enhancer elements. BMC MEDICAL GENETICS 2015; 16:30. [PMID: 25943194 PMCID: PMC4630834 DOI: 10.1186/s12881-015-0173-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 04/22/2015] [Indexed: 02/01/2023]
Abstract
Background Beckwith-Wiedemann syndrome (BWS) is a rare pediatric overgrowth disorder with a variable clinical phenotype caused by deregulation affecting imprinted genes in the chromosomal region 11p15. Alterations of the imprinting control region 1 (ICR1) at the IGF2/H19 locus resulting in biallelic expression of IGF2 and biallelic silencing of H19 account for approximately 10% of patients with BWS. The majority of these patients have epimutations of the ICR1 without detectable DNA sequence changes. Only a few patients were found to have deletions. Most of these deletions are small affecting different parts of the ICR1 differentially methylated region (ICR1-DMR) removing target sequences for CTCF. Only a very few deletions reported so far include the H19 gene in addition to the CTCF binding sites. None of these deletions include IGF2. Case presentation A male patient was born with hypotonia, facial dysmorphisms and hypoglycemia suggestive of Beckwith-Wiedemann syndrome. Using methylation-specific (MS)-MLPA (Multiplex ligation-dependent probe amplification) we have identified a maternally inherited large deletion of the ICR1 region in a patient and his mother. The deletion results in a variable clinical expression with a classical BWS in the mother and a more severe presentation of BWS in her son. By genome-wide SNP array analysis the deletion was found to span ~100 kb genomic DNA including the ICR1DMR, H19, two adjacent non-imprinted genes and two of three predicted enhancer elements downstream to H19. Methylation analysis by deep bisulfite next generation sequencing revealed hypermethylation of the maternal allele at the IGF2 locus in both, mother and child, although IGF2 is not affected by the deletion. Conclusions We here report on a novel large familial deletion of the ICR1 region in a BWS family. Due to the deletion of the ICR1-DMR CTCF binding cannot take place and the residual enhancer elements have access to the IGF2 promoters. The aberrant methylation (hypermethylation) of the maternal IGF2 allele in both affected family members may reflect the active state of the normally silenced maternal IGF2 copy and can be a consequence of the deletion. The deletion results in a variable clinical phenotype and expression. Electronic supplementary material The online version of this article (doi:10.1186/s12881-015-0173-2) contains supplementary material, which is available to authorized users.
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Franco MM, Prickett AR, Oakey RJ. The role of CCCTC-binding factor (CTCF) in genomic imprinting, development, and reproduction. Biol Reprod 2014; 91:125. [PMID: 25297545 DOI: 10.1095/biolreprod.114.122945] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
CCCTC-binding factor (CTCF) is the major protein involved in insulator activity in vertebrates, with widespread DNA binding sites in the genome. CTCF participates in many processes related to global chromatin organization and remodeling, contributing to the repression or activation of gene transcription. It is also involved in epigenetic reprogramming and is essential during gametogenesis and embryo development. Abnormal DNA methylation patterns at CTCF motifs may impair CTCF binding to DNA, and are related to fertility disorders in mammals. Therefore, CTCF and its binding sites are important candidate regions to be investigated as molecular markers for gamete and embryo quality. This article reviews the role of CTCF in genomic imprinting, gametogenesis, and early embryo development and, moreover, highlights potential opportunities for environmental influences associated with assisted reproductive techniques (ARTs) to affect CTCF-mediated processes. We discuss the potential use of CTCF as a molecular marker for assessing gamete and embryo quality in the context of improving the efficiency and safety of ARTs.
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Affiliation(s)
- Maurício M Franco
- Embrapa Genetic Resources & Biotechnology, Laboratory of Animal Reproduction, Parque Estação Biológica, Brasília, Brazil
| | - Adam R Prickett
- Department of Medical & Molecular Genetics, King's College London, Guy's Hospital, London, United Kingdom
| | - Rebecca J Oakey
- Department of Medical & Molecular Genetics, King's College London, Guy's Hospital, London, United Kingdom
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27
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Eggermann T, Binder G, Brioude F, Maher ER, Lapunzina P, Cubellis MV, Bergadá I, Prawitt D, Begemann M. CDKN1C mutations: two sides of the same coin. Trends Mol Med 2014; 20:614-22. [PMID: 25262539 DOI: 10.1016/j.molmed.2014.09.001] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 08/13/2014] [Accepted: 09/02/2014] [Indexed: 01/03/2023]
Abstract
Cyclin-dependent kinase (CDK)-inhibitor 1C (CDKN1C) negatively regulates cellular proliferation and it has been shown that loss-of-function mutations in the imprinted CDKN1C gene (11p15.5) are associated with the overgrowth disorder Beckwith-Wiedemann syndrome (BWS). With recent reports of gain-of-function mutations of the PCNA domain of CDKN1C in growth-retarded patients with IMAGe syndrome or Silver-Russell syndrome (SRS), its key role for growth has been confirmed. Thereby, the last gap in the spectrum of molecular alterations in 11p15.5 in growth-retardation and overgrowth syndromes could be closed. Recent functional studies explain the strict association of CDKN1C mutations with clinically opposite phenotypes and thereby contribute to our understanding of the function and regulation of the gene in particular and epigenetic regulation in general.
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Affiliation(s)
- Thomas Eggermann
- Institute of Human Genetics, University Hospital, Technical University Aachen, Aachen, Germany.
| | - Gerhard Binder
- University Children's Hospital, Paediatric Endocrinology, University of Tübingen, Tübingen, Germany
| | - Frédéric Brioude
- AP-HP, Hôpital Armand Trousseau, Explorations Fonctionnelles Endocriniennes, Paris, France
| | - Eamonn R Maher
- Department of Medical Genetics, University of Cambridge, Cambridge, UK; NIHR Cambridge Biomedical Research Centre, Cambridge, UK
| | - Pablo Lapunzina
- INGEMM, Instituto de Genética Médica y Molecular, Hospital Universitario La Paz, IdiPAZ, CIBERER-ISCIII, Madrid, Spain
| | | | - Ignacio Bergadá
- Centro de Investigaciones Endocrinológicas 'Dr César Bergadá' (CEDIE), CONICET-FEI-División de Endocrinología, Hospital de Niños Ricardo Gutiérrez, Buenos Aires, Argentina
| | - Dirk Prawitt
- Molekulare Pädiatrie, Zentrum für Kinder- und Jugendmedizin, Universitätsmedizin Mainz, Mainz, Germany
| | - Matthias Begemann
- Institute of Human Genetics, University Hospital, Technical University Aachen, Aachen, Germany
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28
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Abi Habib W, Azzi S, Brioude F, Steunou V, Thibaud N, Das Neves C, Le Jule M, Chantot-Bastaraud S, Keren B, Lyonnet S, Michot C, Rossi M, Pasquier L, Gicquel C, Rossignol S, Le Bouc Y, Netchine I. Extensive investigation of the IGF2/H19 imprinting control region reveals novel OCT4/SOX2 binding site defects associated with specific methylation patterns in Beckwith-Wiedemann syndrome. Hum Mol Genet 2014; 23:5763-73. [PMID: 24916376 DOI: 10.1093/hmg/ddu290] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Isolated gain of methylation (GOM) at the IGF2/H19 imprinting control region 1 (ICR1) accounts for about 10% of patients with BWS. A subset of these patients have genetic defects within ICR1, but the frequency of these defects has not yet been established in a large cohort of BWS patients with isolated ICR1 GOM. Here, we carried out a genetic analysis in a large cohort of 57 BWS patients with isolated ICR1 GOM and analyzed the methylation status of the entire domain. We found a new point mutation in two unrelated families and a 21 bp deletion in another unrelated child, both of which were maternally inherited and affected the OCT4/SOX2 binding site in the A2 repeat of ICR1. Based on data from this and previous studies, we estimate that cis genetic defects account for about 20% of BWS patients with isolated ICR1 GOM. Methylation analysis at eight loci of the IGF2/H19 domain revealed that sites surrounding OCT4/SOX2 binding site mutations were fully methylated and methylation indexes declined as a function of distance from these sites. This was not the case in BWS patients without genetic defects identified. Thus, GOM does not spread uniformly across the IGF2/H19 domain, suggesting that OCT4/SOX2 protects against methylation at local sites. These findings add new insights to the mechanism of the regulation of the ICR1 domain. Our data show that mutations and deletions within ICR1 are relatively common. Systematic identification is therefore necessary to establish appropriate genetic counseling for BWS patients with isolated ICR1 GOM.
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Affiliation(s)
- Walid Abi Habib
- INSERM, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France
| | - Salah Azzi
- INSERM, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France
| | - Frédéric Brioude
- INSERM, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France
| | | | - Nathalie Thibaud
- Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France
| | | | - Marilyne Le Jule
- Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France
| | - Sandra Chantot-Bastaraud
- INSERM U933, Service de Génétique et D'Embryologie Médicales, Paris 75571, France, AP-HP, Hôpital Trousseau, Service de Génétique et D'Embryologie Médicales, Paris 75571, France
| | - Boris Keren
- Département de Génétique, CRICM UPMC INSERM UMR_S975/CNRS UMR 7225, GH Pitié-Salpêtrière, APHP, Paris, France
| | - Stanislas Lyonnet
- University Paris Descartes-Sorbonne, Paris Cité, Institut Imagine, INSERM U1163, Hôpital Necker-Enfants Malades, Paris, France
| | - Caroline Michot
- University Paris Descartes-Sorbonne, Paris Cité, Institut Imagine, INSERM U1163, Hôpital Necker-Enfants Malades, Paris, France
| | - Massimiliano Rossi
- Service de Génétique, Centre de Référence des Anomalies du Développement Centre-Est, Hospices Civils de Lyon, Bron, France, INSERM U1028 UMR CNRS 5292, UCBL, CRNL TIGER Team, Lyon, France
| | - Laurent Pasquier
- Service de Génétique Médicale-CLAD Ouest, Hôpital Sud, CHU Rennes, Rennes, France and
| | - Christine Gicquel
- Epigenetics in Human Health and Disease, Baker IDI Heart and Diabetes Institute, Melbourne, VIC 3004, Australia
| | - Sylvie Rossignol
- INSERM, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France
| | - Yves Le Bouc
- INSERM, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France
| | - Irène Netchine
- INSERM, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Sorbonne Universités, UPMC Univ Paris 06, UMR_S 938, CDR Saint-Antoine, Paris F-75012, France, Pediatric Endocrinology, APHP, Armand Trousseau Hospital, Paris, France,
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Azzi S, Abi Habib W, Netchine I. Beckwith-Wiedemann and Russell-Silver Syndromes: from new molecular insights to the comprehension of imprinting regulation. Curr Opin Endocrinol Diabetes Obes 2014; 21:30-8. [PMID: 24322424 DOI: 10.1097/med.0000000000000037] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
PURPOSE OF REVIEW The imprinted human 11p15.5 region encompasses two imprinted domains important for the control of fetal growth: the H19/IGF2 domain in the telomeric region and the KCNQ1OT1/CDKN1C domain in the centromeric region. These two domains are differentially methylated and each is regulated by its own imprinting control region (ICR): ICR1 in the telomeric region and ICR2 in the centromeric region. Aberrant methylation of the 11p15.5 imprinted region, through genetic or epigenetic mechanisms, leads to two clinical syndromes, with opposite growth phenotypes: Russell-Silver Syndrome (RSS; with severe fetal and postnatal growth retardation) and Beckwith-Wiedemann Syndrome (BWS; an overgrowth syndrome). RECENT FINDINGS In this review, we discuss the recently identified molecular abnormalities at 11p15.5 involved in RSS and BWS, which have led to the identification of cis-acting elements and trans-acting regulatory factors involved in the regulation of imprinting in this region. We also discuss the multilocus imprinting disorders identified in various human syndromes, their clinical outcomes and their impact on commonly identified metabolism disorders. SUMMARY These new findings and progress in this field will have direct consequence for diagnostic and predictive tools, risk assessment and genetic counseling for these syndromes.
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Affiliation(s)
- Salah Azzi
- aAP-HP, Hôpital Armand Trousseau, Explorations Fonctionnelles Endocriniennes bUPMC Paris 6, UMR_S938, Centre de Recherche de Saint-Antoine cINSERM, UMR_S938, Centre de Recherche de Saint-Antoine, Paris, France
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30
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Marshall AD, Bailey CG, Rasko JEJ. CTCF and BORIS in genome regulation and cancer. Curr Opin Genet Dev 2013; 24:8-15. [PMID: 24657531 DOI: 10.1016/j.gde.2013.10.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 10/18/2013] [Accepted: 10/19/2013] [Indexed: 10/25/2022]
Abstract
CTCF plays a vital role in chromatin structure and function. CTCF is ubiquitously expressed and plays diverse roles in gene regulation, imprinting, insulation, intra/interchromosomal interactions, nuclear compartmentalisation, and alternative splicing. CTCF has a single paralogue, the testes-specific CTCF-like gene (CTCFL)/BORIS. CTCF and BORIS can be deregulated in cancer. The tumour suppressor gene CTCF can be mutated or deleted in cancer, or CTCF DNA binding can be altered by epigenetic changes. BORIS is aberrantly expressed frequently in cancer, leading some to propose a pro-tumourigenic role for BORIS. However, BORIS can inhibit cell proliferation, and is mutated in cancer similarly to CTCF suggesting BORIS activation in cancer may be due to global genetic or epigenetic changes typical of malignant transformation.
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Affiliation(s)
- Amy D Marshall
- Gene and Stem Cell Therapy Program, Centenary Institute, Missenden Road, Camperdown 2050, NSW, Australia; Sydney Medical School, University of Sydney, Sydney 2006, NSW, Australia
| | - Charles G Bailey
- Gene and Stem Cell Therapy Program, Centenary Institute, Missenden Road, Camperdown 2050, NSW, Australia; Sydney Medical School, University of Sydney, Sydney 2006, NSW, Australia
| | - John E J Rasko
- Gene and Stem Cell Therapy Program, Centenary Institute, Missenden Road, Camperdown 2050, NSW, Australia; Sydney Medical School, University of Sydney, Sydney 2006, NSW, Australia; Cell and Molecular Therapies, Royal Prince Alfred Hospital, Camperdown 2050, NSW, Australia.
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31
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Higashimoto K, Jozaki K, Kosho T, Matsubara K, Fuke T, Yamada D, Yatsuki H, Maeda T, Ohtsuka Y, Nishioka K, Joh K, Koseki H, Ogata T, Soejima H. A novel de novo point mutation of the OCT-binding site in the IGF2/H19-imprinting control region in a Beckwith-Wiedemann syndrome patient. Clin Genet 2013; 86:539-44. [PMID: 24299031 DOI: 10.1111/cge.12318] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 10/21/2013] [Accepted: 11/06/2013] [Indexed: 11/29/2022]
Abstract
The IGF2/H19-imprinting control region (ICR1) functions as an insulator to methylation-sensitive binding of CTCF protein, and regulates imprinted expression of IGF2 and H19 in a parental origin-specific manner. ICR1 methylation defects cause abnormal expression of imprinted genes, leading to Beckwith-Wiedemann syndrome (BWS) or Silver-Russell syndrome (SRS). Not only ICR1 microdeletions involving the CTCF-binding site, but also point mutations and a small deletion of the OCT-binding site have been shown to trigger methylation defects in BWS. Here, mutational analysis of ICR1 in 11 BWS and 12 SRS patients with ICR1 methylation defects revealed a novel de novo point mutation of the OCT-binding site on the maternal allele in one BWS patient. In BWS, all reported mutations and the small deletion of the OCT-binding site, including our case, have occurred within repeat A2. These findings indicate that the OCT-binding site is important for maintaining an unmethylated status of maternal ICR1 in early embryogenesis.
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Affiliation(s)
- K Higashimoto
- Division of Molecular Genetics & Epigenetics, Department of Biomolecular Sciences, Faculty of Medicine, Saga University, Saga, Japan
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32
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Calvello M, Tabano S, Colapietro P, Maitz S, Pansa A, Augello C, Lalatta F, Gentilin B, Spreafico F, Calzari L, Perotti D, Larizza L, Russo S, Selicorni A, Sirchia SM, Miozzo M. Quantitative DNA methylation analysis improves epigenotype-phenotype correlations in Beckwith-Wiedemann syndrome. Epigenetics 2013; 8:1053-60. [PMID: 23917791 PMCID: PMC3891686 DOI: 10.4161/epi.25812] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Beckwith-Wiedemann syndrome (BWS) is a rare disorder characterized by overgrowth and predisposition to embryonal tumors. BWS is caused by various epigenetic and/or genetic alterations that dysregulate the imprinted genes on chromosome region 11p15.5. Molecular analysis is required to reinforce the clinical diagnosis of BWS and to identify BWS patients with cancer susceptibility. This is particularly crucial prenatally because most signs of BWS cannot be recognized in utero. We established a reliable molecular assay by pyrosequencing to quantitatively evaluate the methylation profiles of ICR1 and ICR2. We explored epigenotype-phenotype correlations in 19 patients that fulfilled the clinical diagnostic criteria for BWS, 22 patients with suspected BWS, and three fetuses with omphalocele. Abnormal methylation was observed in one prenatal case and 19 postnatal cases, including seven suspected BWS. Seven cases showed ICR1 hypermethylation, five cases showed ICR2 hypomethylation, and eight cases showed abnormal methylation of ICR1 and ICR2 indicating paternal uniparental disomy (UPD). More cases of ICR1 alterations and UPD were found than expected. This is likely due to the sensitivity of this approach, which can detect slight deviations in methylation from normal levels. There was a significant correlation (p < 0.001) between the percentage of ICR1 methylation and BWS features: severe hypermethylation (range: 75–86%) was associated with macroglossia, macrosomia, and visceromegaly, whereas mild hypermethylation (range: 55–59%) was associated with umbilical hernia and diastasis recti. Evaluation of ICR1 and ICR2 methylation by pyrosequencing in BWS can improve epigenotype-phenotype correlations, detection of methylation alterations in suspected cases, and identification of UPD.
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Affiliation(s)
- Mariarosaria Calvello
- Division of Pathology; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico; Milano, Italy
| | - Silvia Tabano
- Division of Pathology; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico; Milano, Italy; Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Milano, Italy
| | - Patrizia Colapietro
- Department of Health Sciences; Università degli Studi di Milano; Milano, Italy
| | - Silvia Maitz
- Clinical Genetics; Pediatric Department; S. Gerardo Hospital; Fondazione MBBM; Università di Milano-Bicocca; Monza, Italy
| | - Alessandra Pansa
- Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Milano, Italy
| | - Claudia Augello
- Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Milano, Italy
| | - Faustina Lalatta
- Clinical Genetics Unit; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico; Milano, Italy
| | - Barbara Gentilin
- Clinical Genetics Unit; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico; Milano, Italy
| | - Filippo Spreafico
- Pediatric Oncology Unit; Fondazione IRCCS Istituto Nazionale dei Tumori; Milano, Italy
| | - Luciano Calzari
- Molecular Biology Laboratory; Istituto Auxologico Italiano; Milano, Italy
| | - Daniela Perotti
- Molecular Bases of Genetic Risk and Genetic Testing Unit; Department of Preventive and Predictive Medicine; Fondazione IRCCS Istituto Nazionale dei Tumori; Milano, Italy
| | - Lidia Larizza
- Department of Health Sciences; Università degli Studi di Milano; Milano, Italy; Molecular Biology Laboratory; Istituto Auxologico Italiano; Milano, Italy
| | - Silvia Russo
- Molecular Biology Laboratory; Istituto Auxologico Italiano; Milano, Italy
| | - Angelo Selicorni
- Clinical Genetics; Pediatric Department; S. Gerardo Hospital; Fondazione MBBM; Università di Milano-Bicocca; Monza, Italy
| | - Silvia M Sirchia
- Division of Pathology; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico; Milano, Italy; Department of Health Sciences; Università degli Studi di Milano; Milano, Italy
| | - Monica Miozzo
- Division of Pathology; Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico; Milano, Italy; Department of Pathophysiology and Transplantation; Università degli Studi di Milano; Milano, Italy
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Gregor A, Oti M, Kouwenhoven E, Hoyer J, Sticht H, Ekici A, Kjaergaard S, Rauch A, Stunnenberg H, Uebe S, Vasileiou G, Reis A, Zhou H, Zweier C. De novo mutations in the genome organizer CTCF cause intellectual disability. Am J Hum Genet 2013; 93:124-31. [PMID: 23746550 PMCID: PMC3710752 DOI: 10.1016/j.ajhg.2013.05.007] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/24/2013] [Accepted: 05/13/2013] [Indexed: 11/29/2022] Open
Abstract
An increasing number of genes involved in chromatin structure and epigenetic regulation has been implicated in a variety of developmental disorders, often including intellectual disability. By trio exome sequencing and subsequent mutational screening we now identified two de novo frameshift mutations and one de novo missense mutation in CTCF in individuals with intellectual disability, microcephaly, and growth retardation. Furthermore, an individual with a larger deletion including CTCF was identified. CTCF (CCCTC-binding factor) is one of the most important chromatin organizers in vertebrates and is involved in various chromatin regulation processes such as higher order of chromatin organization, enhancer function, and maintenance of three-dimensional chromatin structure. Transcriptome analyses in all three individuals with point mutations revealed deregulation of genes involved in signal transduction and emphasized the role of CTCF in enhancer-driven expression of genes. Our findings indicate that haploinsufficiency of CTCF affects genomic interaction of enhancers and their regulated gene promoters that drive developmental processes and cognition.
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Affiliation(s)
- Anne Gregor
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Martin Oti
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, the Netherlands
| | - Evelyn N. Kouwenhoven
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, the Netherlands
| | - Juliane Hoyer
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Heinrich Sticht
- Bioinformatics, Institute of Biochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Arif B. Ekici
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Susanne Kjaergaard
- Department of Clinical Genetics, University Hospital of Copenhagen, Rigshospitalet, 2100 Copenhagen, Denmark
| | - Anita Rauch
- Institute of Medical Genetics, University of Zurich, 8603 Schwerzenbach, Switzerland
| | - Hendrik G. Stunnenberg
- Department of Molecular Biology, Faculty of Science, Radboud University Nijmegen, 6525 GA Nijmegen, the Netherlands
| | - Steffen Uebe
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Georgia Vasileiou
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - André Reis
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Huiqing Zhou
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, the Netherlands
- Department of Molecular Developmental Biology, Faculty of Science, Radboud University Nijmegen, 6525 GA Nijmegen, the Netherlands
| | - Christiane Zweier
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
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Sakaguchi R, Okamura E, Matsuzaki H, Fukamizu A, Tanimoto K. Sox-Oct motifs contribute to maintenance of the unmethylated H19 ICR in YAC transgenic mice. Hum Mol Genet 2013; 22:4627-37. [DOI: 10.1093/hmg/ddt311] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Rancourt RC, Harris HR, Barault L, Michels KB. The prevalence of loss of imprinting of H19 and IGF2 at birth. FASEB J 2013; 27:3335-43. [PMID: 23620526 DOI: 10.1096/fj.12-225284] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Imprinted genes are monoallelically expressed according to the parent of origin and are critical for proper placental and embryonic development. Disruption of methylation patterns at imprinted loci resulting in loss of imprinting (LOI) may lead to serious imprinting disorders (e.g., Beckwith-Wiedemann syndrome) and is described in some cancers (e.g., Wilms' tumor). As most research has focused on children with cancer or other abnormal phenotypes, the imprinting status in healthy infants at birth has not been characterized. We examined the prevalence of H19 and IGF2 LOI at birth by allele-specific expression assays analysis on 114 human individuals. Overall expression and methylation analyses were performed on a subset of samples. We found that LOI of H19 was observed for 4% of individuals in cord blood and 3.3% in placenta, and for IGF2 of 22% of individuals in the cord blood and 0% in placenta. Interestingly, LOI status did not correspond to aberrant methylation levels of the imprinted DMRs or with changes in overall gene expression for the majority of individuals. Our observations suggest that LOI is present in phenotypically healthy infants. Determining a "normal" human epigenotype range is important for discovering factors required to maintain a healthy pregnancy and embryonic development.
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Affiliation(s)
- Rebecca C Rancourt
- Obstetrics and Gynecology Epidemiology Center, Brigham and Women's Hospital, Harvard Medical School, 221 Longwood Ave., Boston, MA 02115, USA
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Evidence for anticipation in Beckwith-Wiedemann syndrome. Eur J Hum Genet 2013; 21:1344-8. [PMID: 23572028 PMCID: PMC3831082 DOI: 10.1038/ejhg.2013.71] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 03/02/2013] [Accepted: 03/12/2013] [Indexed: 12/16/2022] Open
Abstract
Classical Beckwith-Wiedemann syndrome (BWS) was diagnosed in two sisters and their male cousin. The children's mothers and a third sister were tall statured (178, 185 and 187 cm) and one had mild BWS features as a child. Their parents had average heights of 173 cm (mother) and 180 cm (father). This second generation tall stature and third generation BWS correlated with increased methylation of the maternal H19/IGF2-locus. The results were obtained by bisulphite treatment and subclone Sanger sequencing or next generation sequencing to quantitate the degree of CpG-methylation on three locations: the H19 promoter region and two CTCF binding sites in the H19 imprinting control region (ICR1), specifically in ICR1 repeats B1 and B7. Upon ICR1 copy number analysis and sequencing, the same maternal point variant NCBI36:11:g.1979595T>C that had been described previously as a cause of BWS in three brothers, was found. As expected, this point variant was on the paternal allele in the non-affected grandmother. This nucleotide variant has been shown to affect OCTamer-binding transcription factor-4 (OCT4) binding, which may be necessary for maintaining the unmethylated state of the maternal allele. Our data extend these findings by showing that the OCT4 binding site mutation caused incomplete switching from paternal to maternal ICR1 methylation imprint, and that upon further maternal transmission, methylation of the incompletely demethylated variant ICR1 allele was further increased. This suggests that maternal and paternal ICR1 alleles are treated differentially in the female germline, and only the paternal allele appears to be capable of demethylation.
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Abstract
Zusammenfassung
Bei allen derzeit bekannten Imprintingerkrankungen wurde über eine Assoziation mit molekularen Veränderungen an krankheitsspezifischen chromosomalen Loci berichtet. Die locusspezifische Zuordnung einiger dieser Krankheitsbilder wird erschwert durch den Nachweis so genannter Multilocusmethylierungsdefekte (MLMD): Dabei besteht nicht nur an krankheitsspezifischen geprägten Genorten eine aberrante Methylierung, sondern auch an anderen Loci. Klinisch zeigt sich mehrheitlich die Symptomatik nur einer Imprintingerkrankung, in einzelnen Fällen überlappen sich jedoch verschiedene Krankheitsbilder. Umgekehrt wurden auch Fälle mit gleichartigem MLMD-Muster, aber unterschiedlichen Krankheitsbildern beschrieben. Zur Abklärung von MLMD sollten daher Testverfahren eingesetzt werden, die auf Methylierungsveränderungen an verschiedenen geprägten Loci ausgerichtet sind. Aber auch bei der MLMD-Testung ist eine eindeutige Unterscheidung des zugrunde liegenden Mutationstyps als Basis für eine gezielte genetische Beratung erforderlich.
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38
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Beygo J, Citro V, Sparago A, De Crescenzo A, Cerrato F, Heitmann M, Rademacher K, Guala A, Enklaar T, Anichini C, Cirillo Silengo M, Graf N, Prawitt D, Cubellis MV, Horsthemke B, Buiting K, Riccio A. The molecular function and clinical phenotype of partial deletions of the IGF2/H19 imprinting control region depends on the spatial arrangement of the remaining CTCF-binding sites. Hum Mol Genet 2012; 22:544-57. [PMID: 23118352 PMCID: PMC3542864 DOI: 10.1093/hmg/dds465] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
At chromosome 11p15.5, the imprinting centre 1 (IC1) controls the parent of origin-specific expression of the IGF2 and H19 genes. The 5 kb IC1 region contains multiple target sites (CTS) for the zinc-finger protein CTCF, whose binding on the maternal chromosome prevents the activation of IGF2 and allows that of H19 by common enhancers. CTCF binding helps maintaining the maternal IC1 methylation-free, whereas on the paternal chromosome gamete-inherited DNA methylation inhibits CTCF interaction and enhancer-blocking activity resulting in IGF2 activation and H19 silencing. Maternally inherited 1.4–2.2 kb deletions are associated with methylation of the residual CTSs and Beckwith–Wiedemann syndrome, although with different penetrance and expressivity. We explored the relationship between IC1 microdeletions and phenotype by analysing a number of previously described and novel mutant alleles. We used a highly quantitative assay based on next generation sequencing to measure DNA methylation in affected families and analysed enhancer-blocking activity and CTCF binding in cultured cells. We demonstrate that the microdeletions mostly affect IC1 function and CTCF binding by changing CTS spacing. Thus, the extent of IC1 inactivation and the clinical phenotype are influenced by the arrangement of the residual CTSs. A CTS spacing similar to the wild-type allele results in moderate IC1 inactivation and is associated with stochastic DNA methylation of the maternal IC1 and incomplete penetrance. Microdeletions with different CTS spacing display severe IC1 inactivation and are associated with IC1 hypermethylation and complete penetrance. Careful characterization of the IC1 microdeletions is therefore needed to predict recurrence risks and phenotypical outcomes.
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Affiliation(s)
- Jasmin Beygo
- Institut für Humangenetik, Universitätsklinikum Essen, Essen, Germany
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Abstract
This review is focusing on a critical mediator of embryonic and postnatal development with multiple implications in inflammation, neoplasia, and other pathological situations in brain and peripheral tissues. These morphogenetic guidance and dependence processes are involved in several malignancies targeting the epithelial and immune systems including the progression of human colorectal cancers. We consider the most important findings and their impact on basic, translational, and clinical cancer research. Expected information can bring new cues for innovative, efficient, and safe strategies of personalized medicine based on molecular markers, protagonists, signaling networks, and effectors inherent to the Netrin axis in pathophysiological states.
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Eggermann T, Leisten I, Binder G, Begemann M, Spengler S. Disturbed methylation at multiple imprinted loci: an increasing observation in imprinting disorders. Epigenomics 2012; 3:625-37. [PMID: 22126250 DOI: 10.2217/epi.11.84] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The widely accepted association between aberrant methylation at specific imprinted loci and distinct imprinting disorders has recently been brought into question by the identification of methylation defects at multiple loci (multilocus methylation defect [MLMD]). Strikingly, in different imprinting disorders, the same MLMD patterns can be observed. The cause for this ambiguous epigenotype-phenotype correlation is currently unknown. Future strategies to solve this enigma have to include all levels of imprinting regulation, ranging from DNA methylation to chromatin organization, as any disturbance of the balanced interaction between the different players in imprinting regulation might cause disturbed expression of imprinted factors. The molecular analysis of MLMD will help in discovering these interactions and contribute to the understanding of genomic imprinting and its disturbances.
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Affiliation(s)
- Thomas Eggermann
- Institute of Human Genetics, RWTH Aachen, Pauwelsstr. 30, D-52074 Aachen, Germany.
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41
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Jarinova O, Ekker M. Regulatory variations in the era of next-generation sequencing: Implications for clinical molecular diagnostics. Hum Mutat 2012; 33:1021-30. [DOI: 10.1002/humu.22083] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 03/06/2012] [Indexed: 01/05/2023]
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Britton LMP, Gonzales-Cope M, Zee BM, Garcia BA. Breaking the histone code with quantitative mass spectrometry. Expert Rev Proteomics 2012; 8:631-43. [PMID: 21999833 DOI: 10.1586/epr.11.47] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Histone post-translational modifications (PTMs) comprise one of the most intricate nuclear signaling networks that govern gene expression in a long-term and dynamic fashion. These PTMs are considered to be 'epigenetic' or heritable from one cell generation to the next and help establish genomic expression patterns. While much of the analyses of histones have historically been performed using site-specific antibodies, these methods are replete with technical obstacles (i.e., cross-reactivity and epitope occlusion). Mass spectrometry-based proteomics has begun to play a significant role in the interrogation of histone PTMs, revealing many new aspects of these modifications that cannot be easily determined with standard biological approaches. Here, we review the accomplishments of mass spectrometry in the histone field, and outline the future roadblocks that must be overcome for mass spectrometry-based proteomics to become the method of choice for chromatin biologists.
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Affiliation(s)
- Laura-Mae P Britton
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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43
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Demars J, Gicquel C. Epigenetic and genetic disturbance of the imprinted 11p15 region in Beckwith-Wiedemann and Silver-Russell syndromes. Clin Genet 2012; 81:350-61. [PMID: 22150955 DOI: 10.1111/j.1399-0004.2011.01822.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Genomic imprinting is a particularly attractive example of epigenetic regulation leading to the parental-origin-specific expression of genes. In several ways, the 11p15 imprinted region is an exemplary model for regulation of genomic imprinting. The two imprinted domains are controlled by imprinting control regions (ICRs) which carry opposite germ line imprints and they are regulated by two major mechanisms of imprinting control. Dysregulation of 11p15 genomic imprinting results in two fetal growth disorders [Silver-Russell (SRS) and Beckwith-Wiedemann (BWS) syndromes], with opposite growth phenotypes. BWS and SRS result from abnormal imprinting involving either, both domains or only one of them, with ICR1 and ICR2 more often involved in SRS and BWS respectively. DNA methylation defects affecting ICR1 or ICR2 account for approximately 60% of SRS and BWS patients. Recent studies have identified new cis-acting regulatory elements, as well as new trans-acting factors involved in the regulation of 11p15 imprinting, therefore establishing new mechanisms of BWS and SRS. Those studies also showed that, apart of CTCF, other transcription factors, including factors of the pluripotency network, play a crucial role in the regulation of 11p15 genomic imprinting. Those new findings have direct consequences in molecular testing, risk assessment and genetic counseling of BWS and SRS patients.
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Affiliation(s)
- J Demars
- Epigenetics in Human Health and Disease, Baker IDI Heart and Diabetes Institute, 75 Commercial Road, Melbourne, VIC 3004, Australia
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44
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Demars J, Rossignol S, Netchine I, Lee KS, Shmela M, Faivre L, Weill J, Odent S, Azzi S, Callier P, Lucas J, Dubourg C, Andrieux J, Le Bouc Y, El-Osta A, Gicquel C. New insights into the pathogenesis of Beckwith-Wiedemann and Silver-Russell syndromes: contribution of small copy number variations to 11p15 imprinting defects. Hum Mutat 2011; 32:1171-82. [PMID: 21780245 DOI: 10.1002/humu.21558] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2011] [Accepted: 06/12/2011] [Indexed: 01/28/2023]
Abstract
The imprinted 11p15 region is organized in two domains, each of them under the control of its own imprinting control region (ICR1 for the IGF2/H19 domain and ICR2 for the KCNQ1OT1/CDKN1C domain). Disruption of 11p15 imprinting results in two fetal growth disorders with opposite phenotypes: the Beckwith-Wiedemann (BWS) and the Silver-Russell (SRS) syndromes. Various 11p15 genetic and epigenetic defects have been demonstrated in BWS and SRS. Among them, isolated DNA methylation defects account for approximately 60% of patients. To investigate whether cryptic copy number variations (CNVs) involving only part of one of the two imprinted domains account for 11p15 isolated DNA methylation defects, we designed a single nucleotide polymorphism array covering the whole 11p15 imprinted region and genotyped 185 SRS or BWS cases with loss or gain of DNA methylation at either ICR1 or ICR2. We describe herein novel small gain and loss CNVs in six BWS or SRS patients, including maternally inherited cis-duplications involving only part of one of the two imprinted domains. We also show that ICR2 deletions do not account for BWS with ICR2 loss of methylation and that uniparental isodisomy involving only one of the two imprinted domains is not a mechanism for SRS or BWS.
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Affiliation(s)
- Julie Demars
- Epigenetics in Human Health and Disease, Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia
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45
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Beckwith-Wiedemann syndrome caused by maternally inherited mutation of an OCT-binding motif in the IGF2/H19-imprinting control region, ICR1. Eur J Hum Genet 2011; 20:240-3. [PMID: 21863054 DOI: 10.1038/ejhg.2011.166] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The imprinted expression of the IGF2 and H19 genes is controlled by the imprinting control region 1 (ICR1) located at chromosome 11p15.5. DNA methylation defects involving ICR1 result in two growth disorders with opposite phenotypes: an overgrowth disorder, the Beckwith-Wiedemann syndrome (maternal ICR1 hypermethylation in 10% of BWS cases) and a growth retardation disorder, the Silver-Russell syndrome (paternal ICR1 loss of methylation in 60% of SRS cases). In familial BWS, hypermethylation of ICR1 has been found in association with microdeletion of repetitive DNA motifs within ICR1 that bind the zinc finger protein CTCF; but more recently, ICR1 point mutations were described in BWS pedigrees. We present a case report of two brothers with BWS and prolonged post-pubertal growth resulting in very large stature. A maternally inherited point mutation was identified in ICR1 in both brothers, which altered binding of OCT transcription factors. The same mutation was present on the paternally inherited allele of their unaffected mother. This is a second report of a point mutation causing ICR1 hypermethylation by altering an OCT-binding motif. The atypical growth phenotype of the brothers may be connected to the unusual underlying cause of their BWS.
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46
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De Crescenzo A, Coppola F, Falco P, Bernardo I, Ausanio G, Cerrato F, Falco L, Riccio A. A novel microdeletion in the IGF2/H19 imprinting centre region defines a recurrent mutation mechanism in familial Beckwith-Wiedemann syndrome. Eur J Med Genet 2011; 54:e451-4. [PMID: 21571108 PMCID: PMC3133689 DOI: 10.1016/j.ejmg.2011.04.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Accepted: 04/25/2011] [Indexed: 11/30/2022]
Abstract
The overgrowth disorder Beckwith–Wiedemann syndrome (BWS) is associated with dysregulation of imprinted genes at chromosome 11p15.5. The molecular defects are heterogeneous but most of the cases are associated with defective DNA methylation at either one of two Imprinting Control Regions (IC1 and IC2) or Uniparental paternal Disomy (UPD) at 11p15.5. In rare cases, the BWS phenotype has been found associated with maternal transmission of IC1 microdeletions. We describe a family with a novel 1.8 kb deletion that is associated with hypermethylation at IC1. The mutation results from recombination between highly homologous sequences containing target sites for the zinc-finger protein CTCF (CTSs). This finding supports the hypothesis that the function of IC1 and the penetrance of the clinical phenotype depend on the spacing of the CTSs resulting from recombination in the mutant allele.
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47
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Abstract
hsa-mir-483 is located within intron 2 of the IGF2 gene. We have previously shown oncogenic features of miR-483-3p through cooperation with IGF2 or by independently targeting the proapoptotic gene BBC3/PUMA. Here we demonstrate that expression of miR-483 can be induced independently of IGF2 by the oncoprotein β-catenin through an interaction with the basic helix-loop-helix protein upstream stimulatory transcription factor 1. We also show that β-catenin itself is a target of miR-483-3p, triggering a negative regulatory loop that becomes ineffective in cells harboring an activating mutation of β-catenin. These results provide insights into the complex regulation of the IGF2/miR-483 locus, revealing players in the β-catenin pathway.
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48
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Abstract
Genes identified as being mutated in Wilms' tumour include TP53, a classic tumour suppressor gene (TSG); CTNNB1 (encoding β-catenin), a classic oncogene; WTX, which accumulating data indicate is a TSG; and WT1, which is inactivated in some Wilms' tumours, similar to a TSG. However, WT1 does not always conform to the TSG label, and some data indicate that WT1 enhances cell survival and proliferation, like an oncogene. Is WT1 a chameleon, functioning as either a TSG or an oncogene, depending on cellular context? Are these labels even appropriate for describing and understanding the function of WT1?
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Affiliation(s)
- Vicki Huff
- Department of Genetics, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
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49
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Gallagher PG, Steiner LA, Liem RI, Owen AN, Cline AP, Seidel NE, Garrett LJ, Bodine DM. Mutation of a barrier insulator in the human ankyrin-1 gene is associated with hereditary spherocytosis. J Clin Invest 2010; 120:4453-65. [PMID: 21099109 DOI: 10.1172/jci42240] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Accepted: 09/22/2010] [Indexed: 11/17/2022] Open
Abstract
Defects of the ankyrin-1 gene are the most common cause in humans of hereditary spherocytosis, an inherited anemia that affects patients of all ethnic groups. In some kindreds, linked -108/-153 nucleotide substitutions have been found in the upstream region of the ankyrin gene promoter that is active in erythroid cells. In vivo, the ankyrin erythroid promoter and its upstream region direct position-independent, uniform expression, a property of barrier insulators. Using human erythroid cell lines and primary cells and transgenic mice, here we have demonstrated that a region upstream of the erythroid promoter is a barrier insulator in vivo in erythroid cells. The region exhibited both functional and structural characteristics of a barrier, including prevention of gene silencing in an in vivo functional assay, appropriate chromatin configuration, and occupancy by barrier-associated proteins. Fragments with the -108/-153 spherocytosis-associated mutations failed to function as barrier insulators in vivo and demonstrated perturbations in barrier-associated chromatin configuration. In transgenic mice, flanking a mutant -108/-153 ankyrin gene promoter with the well-characterized chicken HS4 barrier insulator restored position-independent, uniform expression at levels comparable to wild-type. These data indicate that an upstream region of the ankyrin-1 erythroid promoter acts as a barrier insulator and identify disruption of the barrier element as a potential pathogenetic mechanism of human disease.
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Affiliation(s)
- Patrick G Gallagher
- Departments of Pediatrics, Yale University School of Medicine, New Haven, Connecticut, USA.
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50
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Beckwith-Wiedemann-Syndrom. MED GENET-BERLIN 2010. [DOI: 10.1007/s11825-010-0245-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Zusammenfassung
Das Beckwith-Wiedemann-Syndrom (BWS) ist ein pädiatrisches Überwuchssyndrom mit variablem klinischem Erscheinungsbild. Obwohl die betroffenen Kinder mit zunehmendem Alter immer normaler aussehen, ist es wichtig, die Diagnose BWS zu stellen. Gründe sind mögliche syndromspezifische Komplikationen, insbesondere ein 400-fach erhöhtes Risiko der Patienten, an bestimmten embryonalen Tumoren – Nephroblastome (Wilms-Tumoren), Hepatoblastome u. a. – innerhalb der ersten Lebensjahre zu erkranken. Klinisch überlappt das BWS mit anderen Krankheitsentitäten, sodass eine eindeutige molekulargenetische Diagnostik zur Risikoabschätzung und adäquaten Therapie wünschenswert ist. Molekular ist das BWS mit der Chromosomenregion 11p15.5 assoziiert, einer Region in der es 2 Cluster von Genen gibt, die dem genomischen Imprinting unterliegen. Bei den Patienten lassen sich Sequenzabweichungen in bestimmten Genen finden, die Mehrzahl weisen aber DNA-Methylierungsveränderungen auf, welche die Gendosis der funktionell zur Verfügung stehenden, monoallelisch aktiven 11p15.5-Gene pathogen beeinflussen. Zurzeit existiert nur eine sehr unvollständige Genotyp-Phänotyp-Korrelation. Aktuelle Forschungsarbeiten liefern Ansätze, die Ätiopathogenese des Syndroms molekular besser zu verstehen. So werden beispielsweise Interaktionspartner identifiziert, die das Imprinting der 11p15.5-Gene modifizieren und epigenetisch regulieren.
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