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Pérez-Sisqués L, Bhatt SU, Matuleviciute R, Gileadi TE, Kramar E, Graham A, Garcia FG, Keiser A, Matheos DP, Cain JA, Pittman AM, Andreae LC, Fernandes C, Wood MA, Giese KP, Basson MA. The Intellectual Disability Risk Gene Kdm5b Regulates Long-Term Memory Consolidation in the Hippocampus. J Neurosci 2024; 44:e1544232024. [PMID: 38575342 PMCID: PMC11079963 DOI: 10.1523/jneurosci.1544-23.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/21/2024] [Accepted: 03/30/2024] [Indexed: 04/06/2024] Open
Abstract
The histone lysine demethylase KDM5B is implicated in recessive intellectual disability disorders, and heterozygous, protein-truncating variants in KDM5B are associated with reduced cognitive function in the population. The KDM5 family of lysine demethylases has developmental and homeostatic functions in the brain, some of which appear to be independent of lysine demethylase activity. To determine the functions of KDM5B in hippocampus-dependent learning and memory, we first studied male and female mice homozygous for a Kdm5b Δ ARID allele that lacks demethylase activity. Kdm5b Δ ARID/ Δ ARID mice exhibited hyperactivity and long-term memory deficits in hippocampus-dependent learning tasks. The expression of immediate early, activity-dependent genes was downregulated in these mice and hyperactivated upon a learning stimulus compared with wild-type (WT) mice. A number of other learning-associated genes were also significantly dysregulated in the Kdm5b Δ ARID/ Δ ARID hippocampus. Next, we knocked down Kdm5b specifically in the adult, WT mouse hippocampus with shRNA. Kdm5b knockdown resulted in spontaneous seizures, hyperactivity, and hippocampus-dependent long-term memory and long-term potentiation deficits. These findings identify KDM5B as a critical regulator of gene expression and synaptic plasticity in the adult hippocampus and suggest that at least some of the cognitive phenotypes associated with KDM5B gene variants are caused by direct effects on memory consolidation mechanisms.
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Affiliation(s)
- Leticia Pérez-Sisqués
- Centre for Craniofacial and Regenerative Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
- MRC Centre for Neurodevelopmental Disorders, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE1 1UL, United Kingdom
| | - Shail U Bhatt
- Centre for Craniofacial and Regenerative Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Rugile Matuleviciute
- MRC Centre for Neurodevelopmental Disorders, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE1 1UL, United Kingdom
| | - Talia E Gileadi
- Centre for Craniofacial and Regenerative Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Eniko Kramar
- Department of Neurobiology and Behavior, School of Biological Sciences, University of California Irvine, Irvine, California, California 92697
| | - Andrew Graham
- Centre for Craniofacial and Regenerative Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Franklin G Garcia
- Department of Neurobiology and Behavior, School of Biological Sciences, University of California Irvine, Irvine, California, California 92697
| | - Ashley Keiser
- Department of Neurobiology and Behavior, School of Biological Sciences, University of California Irvine, Irvine, California, California 92697
| | - Dina P Matheos
- Department of Neurobiology and Behavior, School of Biological Sciences, University of California Irvine, Irvine, California, California 92697
| | - James A Cain
- Centre for Craniofacial and Regenerative Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Alan M Pittman
- St. George's University of London, London SW17 0RE, United Kingdom
| | - Laura C Andreae
- MRC Centre for Neurodevelopmental Disorders, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE1 1UL, United Kingdom
| | - Cathy Fernandes
- MRC Centre for Neurodevelopmental Disorders, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE1 1UL, United Kingdom
- Social, Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE5 8AB, United Kingdom
| | - Marcelo A Wood
- Department of Neurobiology and Behavior, School of Biological Sciences, University of California Irvine, Irvine, California, California 92697
| | - K Peter Giese
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, Maurice Wohl Clinical Neuroscience Institute, London SE5 9RT, United Kingdom
| | - M Albert Basson
- Centre for Craniofacial and Regenerative Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
- MRC Centre for Neurodevelopmental Disorders, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE1 1UL, United Kingdom
- Department of Clinical and Biomedical Sciences, University of Exeter Medical School, Hatherly Laboratories, Exeter EX4 4PS, United Kingdom
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2
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Mwachaka PM, Gichangi P, Abdelmalek A, Odula P, Ogeng'o J. Maternal usage of varying levels of dietary folate affects the postnatal development of cerebellar folia and cortical layer volumes. Nutr Neurosci 2024:1-11. [PMID: 38367228 DOI: 10.1080/1028415x.2024.2312304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
OBJECTIVE The cerebellum has a long, protracted developmental period; therefore, it is more sensitive to intrauterine and postnatal insults like nutritional deficiencies. Folate is an essential nutrient in fetal and postnatal brain development, and its supplementation during pregnancy is widely recommended. This study aimed to describe the effects of maternal folate intake on postnatal cerebellum development. METHODS Twelve adult female Rattus norwegicus (6-8 weeks old) rats were randomly assigned to one of four groups and given one of four premixed diets: a standard diet (2 mg/kg), a folate-deficient (folate 0 mg/kg), folate-supplemented (8 mg/kg), or folate supra-supplemented (40 mg/kg). The rats began consuming their specific diets 14 days before mating and were maintained on them throughout pregnancy and lactation. Five pups from each group were sacrificed, and their brains processed for light microscopic examination on postnatal days 1, 7, 21, and 35. The data gathered included the morphology of the cerebellar folia and an estimate of the volume of the cerebellar cortical layer using the Cavalieri method. RESULTS Folia of the folate-supplemented and supra-supplemented groups were thicker and showed extensive branching with sub-lobule formation. The folate-deficient diet group's folia were smaller, had more inter-folial spaces, or fused. When compared to the folate-deficient group, the volumes of the cerebellum and individual cerebellar cortical layers were significantly larger in the folate-supplemented and supra-supplemented groups (p<0.05). CONCLUSION Folate supplementation during pregnancy and lactation improves the degree and complexity of the cerebellar folia and the volumes of individual cerebellar cortical layers.
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Affiliation(s)
- Philip Maseghe Mwachaka
- Department of Human Anatomy and Medical Physiology, Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Peter Gichangi
- Department of Human Anatomy and Medical Physiology, Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Adel Abdelmalek
- Department of Human Anatomy and Medical Physiology, Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Paul Odula
- Department of Human Anatomy and Medical Physiology, Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
| | - Julius Ogeng'o
- Department of Human Anatomy and Medical Physiology, Faculty of Health Sciences, University of Nairobi, Nairobi, Kenya
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3
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Donovan APA, Rosko L, Ellegood J, Redhead Y, Green JBA, Lerch JP, Huang JK, Basson MA. Pervasive cortical and white matter anomalies in a mouse model for CHARGE syndrome. J Anat 2023; 243:51-65. [PMID: 36914558 PMCID: PMC10273342 DOI: 10.1111/joa.13856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 01/31/2023] [Accepted: 02/17/2023] [Indexed: 03/16/2023] Open
Abstract
CHARGE (Coloboma of the eye, Heart defects, Atresia of the choanae, Retardation of growth, Genital anomalies and Ear abnormalities) syndrome is a disorder caused by mutations in the gene encoding CHD7, an ATP dependent chromatin remodelling factor, and is characterised by a diverse array of congenital anomalies. These include a range of neuroanatomical comorbidities which likely underlie the varied neurodevelopmental disorders associated with CHARGE syndrome, which include intellectual disability, motor coordination deficits, executive dysfunction, and autism spectrum disorder. Cranial imaging studies are challenging in CHARGE syndrome patients, but high-throughput magnetic resonance imaging (MRI) techniques in mouse models allow for the unbiased identification of neuroanatomical defects. Here, we present a comprehensive neuroanatomical survey of a Chd7 haploinsufficient mouse model of CHARGE syndrome. Our study uncovered widespread brain hypoplasia and reductions in white matter volume across the brain. The severity of hypoplasia appeared more pronounced in posterior areas of the neocortex compared to anterior regions. We also perform the first assessment of white matter tract integrity in this model through diffusion tensor imaging (DTI) to assess the potential functional consequences of widespread reductions in myelin, which suggested the presence of white matter integrity defects. To determine if white matter alterations correspond to cellular changes, we quantified oligodendrocyte lineage cells in the postnatal corpus callosum, uncovering reduced numbers of mature oligodendrocytes. Together, these results present a range of promising avenues of focus for future cranial imaging studies in CHARGE syndrome patients.
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Affiliation(s)
- Alex P. A. Donovan
- Centre for Craniofacial and Regenerative BiologyKing's College LondonLondonUK
| | - Lauren Rosko
- Department of BiologyGeorgetown UniversityWashingtonDCUSA
- Interdisciplinary Program in NeuroscienceGeorgetown UniversityWashingtonDCUSA
| | - Jacob Ellegood
- Mouse Imaging CentreThe Hospital for Sick ChildrenTorontoOntarioCanada
| | - Yushi Redhead
- Centre for Craniofacial and Regenerative BiologyKing's College LondonLondonUK
| | - Jeremy B. A. Green
- Centre for Craniofacial and Regenerative BiologyKing's College LondonLondonUK
| | - Jason P. Lerch
- Mouse Imaging CentreThe Hospital for Sick ChildrenTorontoOntarioCanada
- Department of Medical BiophysicsThe University of TorontoTorontoOntarioCanada
- Department of Neurosciences and Mental HealthThe Hospital for Sick ChildrenTorontoOntarioCanada
- Department of Preclinical Imaging, Wellcome Centre for Integrative NeuroimagingUniversity of OxfordOxfordUK
| | - Jeffrey K. Huang
- Department of BiologyGeorgetown UniversityWashingtonDCUSA
- Interdisciplinary Program in NeuroscienceGeorgetown UniversityWashingtonDCUSA
- Centre for Cell ReprogrammingGeorgetown UniversityWashingtonDCUSA
| | - M. Albert Basson
- Centre for Craniofacial and Regenerative BiologyKing's College LondonLondonUK
- MRC Centre for Neurodevelopmental DisordersKing's College LondonLondonUK
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4
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Krueger LA, Morris AC. Eyes on CHARGE syndrome: Roles of CHD7 in ocular development. Front Cell Dev Biol 2022; 10:994412. [PMID: 36172288 PMCID: PMC9512043 DOI: 10.3389/fcell.2022.994412] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 08/19/2022] [Indexed: 11/13/2022] Open
Abstract
The development of the vertebrate visual system involves complex morphogenetic interactions of cells derived from multiple embryonic lineages. Disruptions in this process are associated with structural birth defects such as microphthalmia, anophthalmia, and coloboma (collectively referred to as MAC), and inherited retinal degenerative diseases such as retinitis pigmentosa and allied dystrophies. MAC and retinal degeneration are also observed in systemic congenital malformation syndromes. One important example is CHARGE syndrome, a genetic disorder characterized by coloboma, heart defects, choanal atresia, growth retardation, genital abnormalities, and ear abnormalities. Mutations in the gene encoding Chromodomain helicase DNA binding protein 7 (CHD7) cause the majority of CHARGE syndrome cases. However, the pathogenetic mechanisms that connect loss of CHD7 to the ocular complications observed in CHARGE syndrome have not been identified. In this review, we provide a general overview of ocular development and congenital disorders affecting the eye. This is followed by a comprehensive description of CHARGE syndrome, including discussion of the spectrum of ocular defects that have been described in this disorder. In addition, we discuss the current knowledge of CHD7 function and focus on its contributions to the development of ocular structures. Finally, we discuss outstanding gaps in our knowledge of the role of CHD7 in eye formation, and propose avenues of investigation to further our understanding of how CHD7 activity regulates ocular and retinal development.
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Affiliation(s)
| | - Ann C. Morris
- Department of Biology, University of Kentucky, Lexington, KY, United States
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5
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A Mini-Review Regarding the Modalities to Study Neurodevelopmental Disorders-Like Impairments in Zebrafish—Focussing on Neurobehavioural and Psychological Responses. Brain Sci 2022; 12:brainsci12091147. [PMID: 36138883 PMCID: PMC9496774 DOI: 10.3390/brainsci12091147] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2022] Open
Abstract
Neurodevelopmental disorders (NDDs) are complex disorders which can be associated with many comorbidities and exhibit multifactorial-dependent phenotypes. An important characteristic is represented by the early onset of the symptoms, during childhood or young adulthood, with a great impact on the socio-cognitive functioning of the affected individuals. Thus, the aim of our review is to describe and to argue the necessity of early developmental stages zebrafish models, focusing on NDDs, especially autism spectrum disorders (ASD) and also on schizophrenia. The utility of the animal models in NDDs or schizophrenia research remains quite controversial. Relevant discussions can be opened regarding the specific characteristics of the animal models and the relationship with the etiologies, physiopathology, and development of these disorders. The zebrafish models behaviors displayed as early as during the pre-hatching embryo stage (locomotor activity prone to repetitive behavior), and post-hatching embryo stage, such as memory, perception, affective-like, and social behaviors can be relevant in ASD and schizophrenia research. The neurophysiological processes impaired in both ASD and schizophrenia are generally highly conserved across all vertebrates. However, the relatively late individual development and conscious social behavior exhibited later in the larval stage are some of the most important limitations of these model animal species.
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6
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Wu X, Chen L, Lu W, He S, Li X, Sun L, Zhang L, Wang D, Zhang R, Liu Y, Sun Y, Feng Z, Wei Zhang V. Discovery of Novel Variants on the CHD7 Gene: A Case Series of CHARGE Syndrome. Front Genet 2022; 13:852429. [PMID: 35938004 PMCID: PMC9355507 DOI: 10.3389/fgene.2022.852429] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 06/06/2022] [Indexed: 01/09/2023] Open
Abstract
Background: CHARGE syndrome (CS) is a single-gene genetic disorder with multiple organ malformations caused by a variant of the chromodomain helicase DNA-binding protein 7 (CHD7) gene on chromosome 8q12.1. In this study, we aimed to investigate new variants that have emerged in these cases compared with typical CS and the relationship between the genes and phenotypes. Methods: Patients with suspected genetic diseases were subjected to Whole Exome Sequencing (WES) at a genetics laboratory in Guangzhou. The average sequencing coverage depth was >200 ×, and 96% was >20 ×. The variant interpretation was manipulated according to the American College of Medical Genetics (ACMG) guidelines. Molecular data on databases for ClinVar and CHD7 were also collected and collated. We reviewed the currently described CHD7 variants and analyzed the genetic variation and phenotypic heterogeneity. Results: Data of 12 patients with CS from four hospitals in China were collected. According to gestational age, most of them (8/12) were near-term babies with a lower birth weight than their peers, averaging 2.62 kg. In this study, the most common phenotypes were respiratory tract malformations (11/12), heart malformations (10/12), and central nervous system malformations (9/12). Two fetuses were confirmed to have brain or heart abnormalities during prenatal testing, while 10/12 were found to have abnormalities during prenatal testing. The maximum Acute Physiology and Chronic Health Evaluation (APACHE II) score at admission was 19, and the average was 11.58. Five variants in the CHD7 gene c.7012C > T (p.Q2338*), c.7868delC (p.P2623Rfs*16), c.5405-3C > G, c.6936 + 2T > C, and c.8077-2A > G) were novel and were located in exons 33, 36, and introns 25, 32, and 37, respectively. There may be a positive correlation between exon location and phenotype. Conclusion: Five novel variants were discovered. These expanded the mutational spectrum of the CHD7 gene and the phenotype of CS. There may be a correlation between the new mutation sites and the phenotype, which has some reference value for the evaluation of mutation sites.
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Affiliation(s)
- Xiangtao Wu
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China,Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China,Department of Pediatrics of First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Liang Chen
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Weihong Lu
- Department of Pediatrics of First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Shaoru He
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China,Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China,*Correspondence: Shaoru He, ; Yumei Liu,
| | - Xiaowen Li
- Neonatal Diagnosis and Treatment Center, Children’s Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | | | | | - Dejuan Wang
- Department of Urology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ruigui Zhang
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yumei Liu
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China,*Correspondence: Shaoru He, ; Yumei Liu,
| | - Yunxia Sun
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhichun Feng
- Department of Neonatology, Faculty of Pediatrics, Chinese PLA General Hospital, BaYi Children’s Hospital, Seventh Medical Center of Chinese PLA General Hospital, Beijing, China
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7
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Ahmed M, Moon R, Prajapati RS, James E, Basson MA, Streit A. The chromatin remodelling factor Chd7 protects auditory neurons and sensory hair cells from stress-induced degeneration. Commun Biol 2021; 4:1260. [PMID: 34732824 PMCID: PMC8566505 DOI: 10.1038/s42003-021-02788-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 10/08/2021] [Indexed: 11/08/2022] Open
Abstract
Neurons and sensory cells are particularly vulnerable to oxidative stress due to their high oxygen demand during stimulus perception and transmission. The mechanisms that protect them from stress-induced death and degeneration remain elusive. Here we show that embryonic deletion of the chromodomain helicase DNA-binding protein 7 (CHD7) in auditory neurons or hair cells leads to sensorineural hearing loss due to postnatal degeneration of both cell types. Mechanistically, we demonstrate that CHD7 controls the expression of major stress pathway components. In its absence, hair cells are hypersensitive, dying rapidly after brief exposure to stress inducers, suggesting that sound at the onset of hearing triggers their degeneration. In humans, CHD7 haploinsufficiency causes CHARGE syndrome, a disorder affecting multiple organs including the ear. Our findings suggest that CHD7 mutations cause developmentally silent phenotypes that predispose cells to postnatal degeneration due to a failure of protective mechanisms.
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Affiliation(s)
- Mohi Ahmed
- Centre for Craniofacial and Regenerative Biology, Floor 27 Tower Wing, Guy's Hospital, King's College London, London, SE1 9RT, UK.
| | - Ruth Moon
- Centre for Craniofacial and Regenerative Biology, Floor 27 Tower Wing, Guy's Hospital, King's College London, London, SE1 9RT, UK
| | - Ravindra Singh Prajapati
- Centre for Craniofacial and Regenerative Biology, Floor 27 Tower Wing, Guy's Hospital, King's College London, London, SE1 9RT, UK
- Leukaemia and Stem Cell Biology Group, School of Cancer and Pharmaceutical Sciences, King's College London, London, SE5 9NU, UK
| | - Elysia James
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE1 1UL, UK
| | - M Albert Basson
- Centre for Craniofacial and Regenerative Biology, Floor 27 Tower Wing, Guy's Hospital, King's College London, London, SE1 9RT, UK
- MRC Centre for Neurodevelopmental Disorders, King's College London, London, SE1 1UL, UK
| | - Andrea Streit
- Centre for Craniofacial and Regenerative Biology, Floor 27 Tower Wing, Guy's Hospital, King's College London, London, SE1 9RT, UK.
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8
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Reddy NC, Majidi SP, Kong L, Nemera M, Ferguson CJ, Moore M, Goncalves TM, Liu HK, Fitzpatrick JAJ, Zhao G, Yamada T, Bonni A, Gabel HW. CHARGE syndrome protein CHD7 regulates epigenomic activation of enhancers in granule cell precursors and gyrification of the cerebellum. Nat Commun 2021; 12:5702. [PMID: 34588434 PMCID: PMC8481233 DOI: 10.1038/s41467-021-25846-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 09/01/2021] [Indexed: 12/16/2022] Open
Abstract
Regulation of chromatin plays fundamental roles in the development of the brain. Haploinsufficiency of the chromatin remodeling enzyme CHD7 causes CHARGE syndrome, a genetic disorder that affects the development of the cerebellum. However, how CHD7 controls chromatin states in the cerebellum remains incompletely understood. Using conditional knockout of CHD7 in granule cell precursors in the mouse cerebellum, we find that CHD7 robustly promotes chromatin accessibility, active histone modifications, and RNA polymerase recruitment at enhancers. In vivo profiling of genome architecture reveals that CHD7 concordantly regulates epigenomic modifications associated with enhancer activation and gene expression of topologically-interacting genes. Genome and gene ontology studies show that CHD7-regulated enhancers are associated with genes that control brain tissue morphogenesis. Accordingly, conditional knockout of CHD7 triggers a striking phenotype of cerebellar polymicrogyria, which we have also found in a case of CHARGE syndrome. Finally, we uncover a CHD7-dependent switch in the preferred orientation of granule cell precursor division in the developing cerebellum, providing a potential cellular basis for the cerebellar polymicrogyria phenotype upon loss of CHD7. Collectively, our findings define epigenomic regulation by CHD7 in granule cell precursors and identify abnormal cerebellar patterning upon CHD7 depletion, with potential implications for our understanding of CHARGE syndrome. CHARGE syndrome that affects cerebellar development can be caused by haploinsufficiency of the chromatin remodeling enzyme CHD7; however the precise role of CHD7 remains unknown. Here the authors show CHD7 promotes chromatin accessibility and enhancer activity in granule cell precursors and regulates morphogenesis of the cerebellar cortex, where loss of CHD7 triggers cerebellar polymicrogyria.
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Affiliation(s)
- Naveen C Reddy
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Shahriyar P Majidi
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.,MD-PhD Program, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Lingchun Kong
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Mati Nemera
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Cole J Ferguson
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Michael Moore
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Tassia M Goncalves
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Hai-Kun Liu
- Division of Molecular Neurogenetics, DKFZ-ZMBH Alliance, German Cancer Research Center Im Neunheimer Feld 280, 69120, Heidelberg, Germany
| | - James A J Fitzpatrick
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Cell Biology & Physiology, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA.,Washington University Center for Cellular Imaging, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Guoyan Zhao
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Tomoko Yamada
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Neurobiology, Northwestern University, Evanston, IL, 60201, USA
| | - Azad Bonni
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - Harrison W Gabel
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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Ahmed R, Sarwar S, Hu J, Cardin V, Qiu LR, Zapata G, Vandeleur L, Yan K, Lerch JP, Corbett MA, Gecz J, Picketts DJ. Transgenic mice with an R342X mutation in Phf6 display clinical features of Börjeson-Forssman-Lehmann Syndrome. Hum Mol Genet 2021; 30:575-594. [PMID: 33772537 PMCID: PMC8120135 DOI: 10.1093/hmg/ddab081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/24/2021] [Accepted: 03/16/2021] [Indexed: 12/26/2022] Open
Abstract
The PHF6 mutation c.1024C > T; p.R342X, is a recurrent cause of Börjeson-Forssman-Lehmann Syndrome (BFLS), a neurodevelopmental disorder characterized by moderate-severe intellectual disability, truncal obesity, gynecomastia, hypogonadism, long tapering fingers and large ears (MIM#301900). Here, we generated transgenic mice with the identical substitution (R342X mice) using CRISPR technology. We show that the p.R342X mutation causes a reduction in PHF6 protein levels, in both human and mice, from nonsense-mediated decay and nonsense-associated alternative splicing, respectively. Magnetic resonance imaging studies indicated that R342X mice had a reduced brain volume on a mixed genetic background but developed hydrocephaly and a high incidence of postnatal death on a C57BL/6 background. Cortical development proceeded normally, while hippocampus and hypothalamus relative brain volumes were altered. A hypoplastic anterior pituitary was also observed that likely contributes to the small size of the R342X mice. Behavior testing demonstrated deficits in associative learning, spatial memory and an anxiolytic phenotype. Taken together, the R342X mice represent a good preclinical model of BFLS that will allow further dissection of PHF6 function and disease pathogenesis.
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Affiliation(s)
- Raies Ahmed
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
- Departments of Biochemistry, Microbiology, & Immunology, Ottawa, Ontario K1H 8M5, Canada
| | - Shihab Sarwar
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
| | - Jinghua Hu
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
| | - Valérie Cardin
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
- Cellular & Molecular Medicine, Ottawa, Ontario K1H 8M5, Canada
| | - Lily R Qiu
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario M5T 3H7, Canada
- Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK
| | - Gerardo Zapata
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
- Departments of Biochemistry, Microbiology, & Immunology, Ottawa, Ontario K1H 8M5, Canada
| | - Lucianne Vandeleur
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
| | - Keqin Yan
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
| | - Jason P Lerch
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Ontario M5T 3H7, Canada
- Wellcome Centre for Integrative Neuroimaging, FMRIB, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 1L7, Canada
| | - Mark A Corbett
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
| | - Jozef Gecz
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia
- South Australian Health and Medical Research Institute, Adelaide, SA 5000, Australia
| | - David J Picketts
- Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
- Departments of Biochemistry, Microbiology, & Immunology, Ottawa, Ontario K1H 8M5, Canada
- Cellular & Molecular Medicine, Ottawa, Ontario K1H 8M5, Canada
- Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
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10
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Lettieri A, Oleari R, Paganoni AJJ, Gervasini C, Massa V, Fantin A, Cariboni A. Semaphorin Regulation by the Chromatin Remodeler CHD7: An Emerging Genetic Interaction Shaping Neural Cells and Neural Crest in Development and Cancer. Front Cell Dev Biol 2021; 9:638674. [PMID: 33869187 PMCID: PMC8047133 DOI: 10.3389/fcell.2021.638674] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/24/2021] [Indexed: 12/16/2022] Open
Abstract
CHD7 is a chromatin remodeler protein that controls gene expression via the formation of multi-protein complexes with specific transcription factors. During development, CHD7 controls several differentiation programs, mainly by acting on neural progenitors and neural crest (NC) cells. Thus, its roles range from the central nervous system to the peripheral nervous system and the organs colonized by NC cells, including the heart. Accordingly, mutated CHD7 is linked to CHARGE syndrome, which is characterized by several neuronal dysfunctions and by malformations of NC-derived/populated organs. Altered CHD7 has also been associated with different neoplastic transformations. Interestingly, recent evidence revealed that semaphorins, a class of molecules involved in developmental and pathological processes similar to those controlled by CHD7, are regulated by CHD7 in a context-specific manner. In this article, we will review the recent insights that support the existence of genetic interactions between these pathways, both during developmental processes and cancer progression.
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Affiliation(s)
- Antonella Lettieri
- CRC Aldo Ravelli for Neurotechnology and Experimental Brain Therapeutics, Università degli Studi di Milano, Milan, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Roberto Oleari
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Alyssa J J Paganoni
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Cristina Gervasini
- CRC Aldo Ravelli for Neurotechnology and Experimental Brain Therapeutics, Università degli Studi di Milano, Milan, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Valentina Massa
- CRC Aldo Ravelli for Neurotechnology and Experimental Brain Therapeutics, Università degli Studi di Milano, Milan, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Alessandro Fantin
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Anna Cariboni
- Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
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11
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Yao H, Hannum DF, Zhai Y, Hill SF, Albanus RD'O, Lou W, Skidmore JM, Sanchez G, Saiakhova A, Bielas SL, Scacheri P, Ljungman M, Parker SCJ, Martin DM. CHD7 promotes neural progenitor differentiation in embryonic stem cells via altered chromatin accessibility and nascent gene expression. Sci Rep 2020; 10:17445. [PMID: 33060836 PMCID: PMC7562747 DOI: 10.1038/s41598-020-74537-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 09/30/2020] [Indexed: 01/09/2023] Open
Abstract
CHARGE syndrome, a rare multiple congenital anomaly condition, is caused by haploinsufficiency of the chromatin remodeling protein gene CHD7 (Chromodomain helicase DNA binding protein 7). Brain abnormalities and intellectual disability are commonly observed in individuals with CHARGE, and neuronal differentiation is reduced in CHARGE patient-derived iPSCs and conditional knockout mouse brains. However, the mechanisms of CHD7 function in nervous system development are not well understood. In this study, we asked whether CHD7 promotes gene transcription in neural progenitor cells via changes in chromatin accessibility. We used Chd7 null embryonic stem cells (ESCs) derived from Chd7 mutant mouse blastocysts as a tool to investigate roles of CHD7 in neuronal and glial differentiation. Loss of Chd7 significantly reduced neuronal and glial differentiation. Sholl analysis showed that loss of Chd7 impaired neuronal complexity and neurite length in differentiated neurons. Genome-wide studies demonstrated that loss of Chd7 leads to modified chromatin accessibility (ATAC-seq) and differential nascent expression (Bru-Seq) of neural-specific genes. These results suggest that CHD7 acts preferentially to alter chromatin accessibility of key genes during the transition of NPCs to neurons to promote differentiation. Our results form a basis for understanding the cell stage-specific roles for CHD7-mediated chromatin remodeling during cell lineage acquisition.
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Affiliation(s)
- Hui Yao
- Department of Pediatrics, University of Michigan, 8220C MSRB III, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109-5652, USA
| | - Douglas F Hannum
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, USA
| | - Yiwen Zhai
- Department of Pediatrics, University of Michigan, 8220C MSRB III, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109-5652, USA.,Center of Genetic and Prenatal Diagnosis, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Sophie F Hill
- College of Literature, Science, and the Arts, University of Michigan, Ann Arbor, MI, USA
| | | | - Wenjia Lou
- Department of Pediatrics, University of Michigan, 8220C MSRB III, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109-5652, USA
| | - Jennifer M Skidmore
- Department of Pediatrics, University of Michigan, 8220C MSRB III, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109-5652, USA
| | - Gilson Sanchez
- Department of Pediatrics, University of Michigan, 8220C MSRB III, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109-5652, USA
| | - Alina Saiakhova
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Stephanie L Bielas
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Peter Scacheri
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Mats Ljungman
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, USA
| | - Stephen C J Parker
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Donna M Martin
- Department of Pediatrics, University of Michigan, 8220C MSRB III, 1150 W. Medical Center Dr., Ann Arbor, MI, 48109-5652, USA. .,Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA.
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12
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Rallapalli H, Darwin BC, Toro-Montoya E, Lerch JP, Turnbull DH. Longitudinal MEMRI analysis of brain phenotypes in a mouse model of Niemann-Pick Type C disease. Neuroimage 2020; 217:116894. [PMID: 32417449 PMCID: PMC7443857 DOI: 10.1016/j.neuroimage.2020.116894] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 04/23/2020] [Accepted: 04/28/2020] [Indexed: 11/15/2022] Open
Abstract
Niemann-Pick Type C (NPC) is a rare genetic disorder characterized by progressive cell death in various tissues, particularly in the cerebellar Purkinje cells, with no known cure. Mouse models for human NPC have been generated and characterized histologically, behaviorally, and using longitudinal magnetic resonance imaging (MRI). Previous imaging studies revealed significant brain volume differences between mutant and wild-type animals, but stopped short of making volumetric comparisons of the cerebellar sub-regions. In this study, we present longitudinal manganese-enhanced MRI (MEMRI) data from cohorts of wild-type, heterozygote carrier, and homozygote mutant NPC mice, as well as deformation-based morphometry (DBM) driven brain volume comparisons across genotypes, including the cerebellar cortex, white matter, and nuclei. We also present the first comparisons of MEMRI signal intensities, reflecting brain and cerebellum sub-regional Mn2+-uptake over time and across genotypes.
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Affiliation(s)
- Harikrishna Rallapalli
- Skirball Institute of Biomolecular Medicine and Department of Radiology, New York University School of Medicine, New York, NY, USA; Biomedical Imaging & Technology Graduate Program, New York University School of Medicine, USA
| | - Benjamin C Darwin
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Canada
| | - Estefania Toro-Montoya
- Skirball Institute of Biomolecular Medicine and Department of Radiology, New York University School of Medicine, New York, NY, USA
| | - Jason P Lerch
- Mouse Imaging Centre, The Hospital for Sick Children, Toronto, Canada; Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | - Daniel H Turnbull
- Skirball Institute of Biomolecular Medicine and Department of Radiology, New York University School of Medicine, New York, NY, USA; Biomedical Imaging & Technology Graduate Program, New York University School of Medicine, USA.
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13
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Suetterlin P, Hurley S, Mohan C, Riegman KLH, Pagani M, Caruso A, Ellegood J, Galbusera A, Crespo-Enriquez I, Michetti C, Yee Y, Ellingford R, Brock O, Delogu A, Francis-West P, Lerch JP, Scattoni ML, Gozzi A, Fernandes C, Basson MA. Altered Neocortical Gene Expression, Brain Overgrowth and Functional Over-Connectivity in Chd8 Haploinsufficient Mice. Cereb Cortex 2019; 28:2192-2206. [PMID: 29668850 PMCID: PMC6018918 DOI: 10.1093/cercor/bhy058] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Indexed: 12/13/2022] Open
Abstract
Truncating CHD8 mutations are amongst the highest confidence risk factors for autism spectrum disorder (ASD) identified to date. Here, we report that Chd8 heterozygous mice display increased brain size, motor delay, hypertelorism, pronounced hypoactivity, and anomalous responses to social stimuli. Whereas gene expression in the neocortex is only mildly affected at midgestation, over 600 genes are differentially expressed in the early postnatal neocortex. Genes involved in cell adhesion and axon guidance are particularly prominent amongst the downregulated transcripts. Resting-state functional MRI identified increased synchronized activity in cortico-hippocampal and auditory-parietal networks in Chd8 heterozygous mutant mice, implicating altered connectivity as a potential mechanism underlying the behavioral phenotypes. Together, these data suggest that altered brain growth and diminished expression of important neurodevelopmental genes that regulate long-range brain wiring are followed by distinctive anomalies in functional brain connectivity in Chd8+/- mice. Human imaging studies have reported altered functional connectivity in ASD patients, with long-range under-connectivity seemingly more frequent. Our data suggest that CHD8 haploinsufficiency represents a specific subtype of ASD where neuropsychiatric symptoms are underpinned by long-range over-connectivity.
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Affiliation(s)
- Philipp Suetterlin
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK
| | - Shaun Hurley
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK
| | - Conor Mohan
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK
| | - Kimberley L H Riegman
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK
| | - Marco Pagani
- Functional Neuroimaging Laboratory, Center for Neuroscience and Cognitive Systems @ UniTn, 38068 Rovereto, TN, Italy
| | - Angela Caruso
- Research Coordination and Support Service, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Jacob Ellegood
- Department of Medical Biophysics, University of Toronto, Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada M5T 3H7
| | - Alberto Galbusera
- Functional Neuroimaging Laboratory, Center for Neuroscience and Cognitive Systems @ UniTn, 38068 Rovereto, TN, Italy
| | - Ivan Crespo-Enriquez
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK
| | - Caterina Michetti
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, 16132 Genova, Italy
| | - Yohan Yee
- Department of Medical Biophysics, University of Toronto, Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada M5T 3H7
| | - Robert Ellingford
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK
| | - Olivier Brock
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London SE5 9NU, UK
| | - Alessio Delogu
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London SE5 9NU, UK
| | - Philippa Francis-West
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK
| | - Jason P Lerch
- Department of Medical Biophysics, University of Toronto, Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada M5T 3H7
| | - Maria Luisa Scattoni
- Research Coordination and Support Service, Istituto Superiore di Sanità, 00161 Rome, Italy
| | - Alessandro Gozzi
- Functional Neuroimaging Laboratory, Center for Neuroscience and Cognitive Systems @ UniTn, 38068 Rovereto, TN, Italy
| | - Cathy Fernandes
- MRC Social, Genetic & Developmental Psychiatry Centre, PO82, Institute of Psychiatry, Psychology & Neuroscience, King's College London, De Crespigny Park, London SE5 8AF, UK.,MRC Centre for Neurodevelopmental Disorders, King's College London, London SE1 1UL, UK
| | - M Albert Basson
- Centre for Craniofacial and Regenerative Biology, King's College London, London SE1 9RT, UK.,MRC Centre for Neurodevelopmental Disorders, King's College London, London SE1 1UL, UK
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14
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Millischer AE, Sonigo P, Attie T, Spaggiari E, O'Gorman N, Bessieres B, Kermorvant E, Boddaert N, Salomon LJ, Grevent D. Fetal MRI findings in a retrospective cohort of 26 cases of prenatally diagnosed CHARGE syndrome individuals. Prenat Diagn 2019; 39:781-791. [PMID: 30715739 DOI: 10.1002/pd.5429] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/20/2019] [Accepted: 01/22/2019] [Indexed: 12/16/2022]
Abstract
"CHARGE syndrome" (CS) is a multifaceted syndrome associated with a poor prognosis. The prenatal diagnosis remains challenging especially as the fetal anomalies that may evoke suspicion of CS are not comprehensively described. OBJECTIVE This study aims to identify the anomalies in MRI with suspected CHARGE syndrome and to propose a possible standardization in the image-based prenatal diagnosis of CS. METHODS This was a retrospective study of 26 fetuses who underwent MRI and had a confirmed diagnosis of CS, as proven by histopathological and/or neonatal examinations and/or the presence of the CHD7 gene mutation. RESULTS The three most frequent MRI anomalies confirmed at histopathological and/or neonatal examinations were arhinencephaly in 100% (26 of 26), dysplasia of the semicircular canals agenesis (SCA) in 100% (24 of 24), and posterior fossa anomalies in 100% (22 of 22). Our study also revealed short petrous bones with a particular triangular shape in 24 of 24 cases of SCA. Other relevant findings included external ear anomalies in 36% (9 of 25), cleft lip and palate (9 of 9), ventriculomegaly (VMG) (6 of 6), short corpus callosum (3 of 3), and ocular asymmetry in 36.6% (4 of 11). CONCLUSION Our study emphasizes the interest of fetal MRI in the diagnosis of CS with an adapted knowledge of semiology.
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Affiliation(s)
- Anne-Elodie Millischer
- Service de Radiologie, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France.,EA fetus, Necker Hospital, Paris, France
| | - Pascale Sonigo
- Service de Radiologie, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - Tania Attie
- Service de Génétique, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - Emmanuel Spaggiari
- Service de Gynécologie-Obstétrique, Hôpital Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris (AP-HP), Université Paris Descartes, Paris, France
| | - Neil O'Gorman
- Service de Gynécologie-Obstétrique, Hôpital Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris (AP-HP), Université Paris Descartes, Paris, France
| | - Bettina Bessieres
- Service d'anatomopathologie, Hôpital Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris (AP-HP), Université Paris Descartes, Paris, France
| | - Elsa Kermorvant
- Service de néonatologie, Hôpital Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris (AP-HP), Université Paris Descartes, Paris, France
| | - Nathalie Boddaert
- Service de Radiologie, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
| | - Laurent-Julien Salomon
- EA fetus, Necker Hospital, Paris, France.,Service de Gynécologie-Obstétrique, Hôpital Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris (AP-HP), Université Paris Descartes, Paris, France
| | - David Grevent
- Service de Radiologie, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (APHP), Paris, France
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15
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Kasah S, Oddy C, Basson MA. Autism-linked CHD gene expression patterns during development predict multi-organ disease phenotypes. J Anat 2018; 233:755-769. [PMID: 30277262 DOI: 10.1111/joa.12889] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/23/2018] [Indexed: 12/24/2022] Open
Abstract
Recent large-scale exome sequencing studies have identified mutations in several members of the CHD (Chromodomain Helicase DNA-binding protein) gene family in neurodevelopmental disorders. Mutations in the CHD2 gene have been linked to developmental delay, intellectual disability, autism and seizures, CHD8 mutations to autism and intellectual disability, whereas haploinsufficiency of CHD7 is associated with executive dysfunction and intellectual disability. In addition to these neurodevelopmental features, a wide range of other developmental defects are associated with mutants of these genes, especially with regards to CHD7 haploinsufficiency, which is the primary cause of CHARGE syndrome. Whilst the developmental expression of CHD7 has been reported previously, limited information on the expression of CHD2 and CHD8 during development is available. Here, we compare the expression patterns of all three genes during mouse development directly. We find high, widespread expression of these genes at early stages of development that gradually becomes restricted during later developmental stages. Chd2 and Chd8 are widely expressed in the developing central nervous system (CNS) at all stages of development, with moderate expression remaining in the neocortex, hippocampus, olfactory bulb and cerebellum of the postnatal brain. Similarly, Chd7 expression is seen throughout the CNS during late embryogenesis and early postnatal development, with strong enrichment in the cerebellum, but displays low expression in the cortex and neurogenic niches in early life. In addition to expression in the brain, novel sites of Chd2 and Chd8 expression are reported. These findings suggest additional roles for these genes in organogenesis and predict that mutation of these genes may predispose individuals to a range of other, non-neurological developmental defects.
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Affiliation(s)
- Sahrunizam Kasah
- Centre for Craniofacial and Regenerative Biology, King's College London, London, UK
| | - Christopher Oddy
- Centre for Craniofacial and Regenerative Biology, King's College London, London, UK
| | - M Albert Basson
- Centre for Craniofacial and Regenerative Biology, King's College London, London, UK.,MRC Centre for Neurodevelopmental Disorders, King's College London, London, UK
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16
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Whittaker DE, Kasah S, Donovan APA, Ellegood J, Riegman KLH, Volk HA, McGonnell I, Lerch JP, Basson MA. Distinct cerebellar foliation anomalies in a CHD7 haploinsufficient mouse model of CHARGE syndrome. AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS 2017; 175. [PMID: 29168327 PMCID: PMC5765394 DOI: 10.1002/ajmg.c.31595] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/22/2017] [Accepted: 09/24/2017] [Indexed: 11/13/2022]
Abstract
Mutations in the gene encoding the ATP dependent chromatin‐remodeling factor, CHD7 are the major cause of CHARGE (Coloboma, Heart defects, Atresia of the choanae, Retarded growth and development, Genital‐urinary anomalies, and Ear defects) syndrome. Neurodevelopmental defects and a range of neurological signs have been identified in individuals with CHARGE syndrome, including developmental delay, lack of coordination, intellectual disability, and autistic traits. We previously identified cerebellar vermis hypoplasia and abnormal cerebellar foliation in individuals with CHARGE syndrome. Here, we report mild cerebellar hypoplasia and distinct cerebellar foliation anomalies in a Chd7 haploinsufficient mouse model. We describe specific alterations in the precise spatio‐temporal sequence of fissure formation during perinatal cerebellar development responsible for these foliation anomalies. The altered cerebellar foliation pattern in Chd7 haploinsufficient mice show some similarities to those reported in mice with altered Engrailed, Fgf8 or Zic1 gene expression and we propose that mutations or polymorphisms in these genes may modify the cerebellar phenotype in CHARGE syndrome. Our findings in a mouse model of CHARGE syndrome indicate that a careful analysis of cerebellar foliation may be warranted in patients with CHARGE syndrome, particularly in patients with cerebellar hypoplasia and developmental delay.
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Affiliation(s)
- Danielle E Whittaker
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom.,Department of Clinical Science and Services, Royal Veterinary College, London, United Kingdom
| | - Sahrunizam Kasah
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Alex P A Donovan
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Jacob Ellegood
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Kimberley L H Riegman
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Holger A Volk
- Department of Clinical Science and Services, Royal Veterinary College, London, United Kingdom
| | - Imelda McGonnell
- Department of Comparative Biomedical Sciences, Royal Veterinary College, London, United Kingdom
| | - Jason P Lerch
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - M Albert Basson
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom.,MRC Centre for Neurodevelopmental Disorders, King's College London, London, United Kingdom
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