1
|
Zhao B, Zhang H, Liu Y, Zu G, Zhang Y, Hu J, Liu S, You L. Forebrain excitatory neuron-specific loss of Brpf1 attenuates excitatory synaptic transmission and impairs spatial and fear memory. Neural Regen Res 2024; 19:1133-1141. [PMID: 37862219 PMCID: PMC10749587 DOI: 10.4103/1673-5374.385307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 06/10/2023] [Accepted: 07/19/2023] [Indexed: 10/22/2023] Open
Abstract
Bromodomain and plant homeodomain (PHD) finger containing protein 1 (Brpf1) is an activator and scaffold protein of a multiunit complex that includes other components involving lysine acetyltransferase (KAT) 6A/6B/7. Brpf1, KAT6A, and KAT6B mutations were identified as the causal genes of neurodevelopmental disorders leading to intellectual disability. Our previous work revealed strong and specific expression of Brpf1 in both the postnatal and adult forebrain, especially the hippocampus, which has essential roles in learning and memory. Here, we hypothesized that Brpf1 plays critical roles in the function of forebrain excitatory neurons, and that its deficiency leads to learning and memory deficits. To test this, we knocked out Brpf1 in forebrain excitatory neurons using CaMKIIa-Cre. We found that Brpf1 deficiency reduced the frequency of miniature excitatory postsynaptic currents and downregulated the expression of genes Pcdhgb1, Slc16a7, Robo3, and Rho, which are related to neural development, synapse function, and memory, thereby damaging spatial and fear memory in mice. These findings help explain the mechanisms of intellectual impairment in patients with BRPF1 mutation.
Collapse
Affiliation(s)
- Baicheng Zhao
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Hang Zhang
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Ying Liu
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Gaoyu Zu
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Yuxiao Zhang
- Shanghai Key Laboratory of Brain Functional Genomics (Ministry of Education), Affiliated Mental Health Center (ECNU), School of Psychology and Cognitive Science, East China Normal University, Shanghai, China
- Shanghai Changning Mental Health Center, Shanghai, China
- NYU-ECNU Institute of Brain and Cognitive Science at NYU Shanghai, Shanghai, China
| | - Jiayi Hu
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Shuai Liu
- Shanghai Key Laboratory of Brain Functional Genomics (Ministry of Education), Affiliated Mental Health Center (ECNU), School of Psychology and Cognitive Science, East China Normal University, Shanghai, China
- Shanghai Changning Mental Health Center, Shanghai, China
- NYU-ECNU Institute of Brain and Cognitive Science at NYU Shanghai, Shanghai, China
| | - Linya You
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
- Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai, China
| |
Collapse
|
2
|
Marziali E, Landini S, Fiorentini E, Rocca C, Tiberi L, Artuso R, Zaroili L, Dirupo E, Fortunato P, Bargiacchi S, Caputo R, Bacci GM. Broadening the ocular phenotypic spectrum of ultra-rare BRPF1 variants: report of two cases. Ophthalmic Genet 2024:1-5. [PMID: 38590032 DOI: 10.1080/13816810.2024.2337879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 03/27/2024] [Indexed: 04/10/2024]
Abstract
INTRODUCTION BRPF1 gene on 3p26-p25 encodes a protein involved in epigenetic regulation, through interaction with histone H3 lysine acetyltransferases KAT6A and KAT6B of the MYST family. Heterozygous pathogenic variants in BRPF1 gene are associated with Intellectual Developmental Disorder with Dysmorphic Facies and Ptosis (IDDDFP), characterized by global developmental delay, intellectual disability, language delay, and dysmorphic facial features. The reported ocular involvement includes strabismus, amblyopia, and refraction errors. This report describes a novel ocular finding in patients affected by variants in the BRPF1 gene. METHODS We performed exome sequencing and deep ocular phenotyping in two unrelated patients (P1, P2) with mild intellectual disability, ptosis, and typical facies. RESULTS Interestingly, P1 had a Chiari Malformation type I and a subclinical optic neuropathy, which could not be explained by variations in other genes. Having detected a peculiar ocular phenotype in P1, we suggested optical coherence tomography (OCT) for P2; such an exam also detected bilateral subclinical optic neuropathy in this case. DISCUSSION To date, only a few patients with BRPF1 variants have been described, and none were reported to have optic neuropathy. Since subclinical optic nerve alterations can go easily undetected, our experience highlights the importance of a more detailed ophthalmologic evaluation in patients with BRPF1 variant.
Collapse
Affiliation(s)
- Elisa Marziali
- Pediatric Ophthalmology Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Samuela Landini
- Medical Genetics Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Erika Fiorentini
- Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Camilla Rocca
- Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Lucia Tiberi
- Medical Genetics Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Rosangela Artuso
- Medical Genetics Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Laila Zaroili
- Medical Genetics Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Elia Dirupo
- Medical Genetics Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Pina Fortunato
- Pediatric Ophthalmology Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Sara Bargiacchi
- Medical Genetics Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Roberto Caputo
- Pediatric Ophthalmology Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| | - Giacomo Maria Bacci
- Pediatric Ophthalmology Unit, Meyer Children's Hospital IRCSS, Florence, Italy
| |
Collapse
|
3
|
Morison LD, Van Reyk O, Baker E, Ruaud L, Couque N, Verloes A, Amor DJ, Morgan AT. Beyond 'speech delay': Expanding the phenotype of BRPF1-related disorder. Eur J Med Genet 2024; 68:104923. [PMID: 38346666 DOI: 10.1016/j.ejmg.2024.104923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/07/2023] [Accepted: 02/01/2024] [Indexed: 02/16/2024]
Abstract
Pathogenic variants in BRPF1 cause intellectual disability, ptosis and facial dysmorphism. Speech and language deficits have been identified as a manifestation of BRPF1-related disorder but have not been systematically characterized. We provide a comprehensive delineation of speech and language abilities in BRPF1-related disorder and expand the phenotype. Speech and language, and health and medical history were assessed in 15 participants (male = 10, median age = 7 years 4 months) with 14 BRPF1 variants. Language disorders were common (11/12), and most had mild to moderate deficits across receptive, expressive, written, and social-pragmatic domains. Speech disorders were frequent (7/9), including phonological delay (6/9) and disorder (3/9), and childhood apraxia of speech (3/9). All those tested for cognitive abilities had a FSIQ ≥70 (4/4). Participants had vision impairment (13/15), fine (8/15) and gross motor delay (10/15) which often resolved in later childhood, infant feeding impairment (8/15), and infant hypotonia (9/15). We have implicated BRPF1-related disorder as causative for speech and language disorder, including childhood apraxia of speech. Adaptive behavior and cognition were strengths when compared to other monogenic neurodevelopmental chromatin-related disorders. The universal involvement of speech and language impairment is noteable, relative to the high degree of phenotypic variability in BRPF1-related disorder.
Collapse
Affiliation(s)
- Lottie D Morison
- Department of Audiology and Speech Pathology, The University of Melbourne, Parkville, Australia; Speech and Language, Murdoch Children's Research Institute, Parkville, Australia.
| | - Olivia Van Reyk
- Speech and Language, Murdoch Children's Research Institute, Parkville, Australia.
| | - Emma Baker
- Speech and Language, Murdoch Children's Research Institute, Parkville, Australia; School of Psychology and Public Health, La Trobe University, Bundoora, Australia.
| | - Lyse Ruaud
- Department of Genetics, APHP-Robert Debré University Hospital, Paris, France; INSERM UMR1141, Neurodiderot, University of Paris Cité, Paris, France.
| | - Nathalie Couque
- Department of Genetics, APHP-Robert Debré University Hospital, Paris, France; Département de Génétique - UF de Génétique Moléculaire, Hôpital Robert Debré, Paris, France.
| | - Alain Verloes
- Department of Genetics, APHP-Robert Debré University Hospital, Paris, France; Medical School, Paris Cité University, Paris, France.
| | - David J Amor
- Speech and Language, Murdoch Children's Research Institute, Parkville, Australia; Department of Paediatrics, The University of Melbourne, Parkville, Australia; Royal Children's Hospital, Parkville, Australia.
| | - Angela T Morgan
- Department of Audiology and Speech Pathology, The University of Melbourne, Parkville, Australia; Speech and Language, Murdoch Children's Research Institute, Parkville, Australia; Royal Children's Hospital, Parkville, Australia.
| |
Collapse
|
4
|
Barman S, Padhan J, Sudhamalla B. Uncovering the non-histone interactome of the BRPF1 bromodomain using site-specific azide-acetyllysine photochemistry. J Biol Chem 2024; 300:105551. [PMID: 38072045 PMCID: PMC10789646 DOI: 10.1016/j.jbc.2023.105551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/23/2023] [Accepted: 12/03/2023] [Indexed: 01/08/2024] Open
Abstract
Bromodomain-PHD finger protein 1 (BRPF1) belongs to the BRPF family of bromodomain-containing proteins. Bromodomains are exclusive reader modules that recognize and bind acetylated histones and non-histone transcription factors to regulate gene expression. The biological functions of acetylated histone recognition by BRPF1 bromodomain are well characterized; however, the function of BRPF1 regulation via non-histone acetylation is still unexplored. Therefore, identifying the non-histone interactome of BRPF1 is pivotal in deciphering its role in diverse cellular processes, including its misregulation in diseases like cancer. Herein, we identified the non-histone interacting partners of BRPF1 utilizing a protein engineering-based approach. We site-specifically introduced the unnatural photo-cross-linkable amino acid 4-azido-L-phenylalanine into the bromodomain of BRPF1 without altering its ability to recognize acetylated histone proteins. Upon photoirradiation, the engineered BRPF1 generates a reactive nitrene species, cross-linking interacting partners with spatio-temporal precision. We demonstrated the robust cross-linking efficiency of the engineered variant with reported histone ligands of BRPF1 and further used the variant reader to cross-link its interactome. We also characterized novel interacting partners by proteomics, suggesting roles for BRPF1 in diverse cellular processes. BRPF1 interaction with interleukin enhancer-binding factor 3, one of these novel interacting partners, was further validated by isothermal titration calorimetry and co-IP. Lastly, we used publicly available ChIP-seq and RNA-seq datasets to understand the colocalization of BRPF1 and interleukin enhancer-binding factor 3 in regulating gene expression in the context of hepatocellular carcinoma. Together, these results will be crucial for full understanding of the roles of BRPF1 in transcriptional regulation and in the design of small-molecule inhibitors for cancer treatment.
Collapse
Affiliation(s)
- Soumen Barman
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
| | - Jyotirmayee Padhan
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
| | - Babu Sudhamalla
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India.
| |
Collapse
|
5
|
Bayanbold K, Younger G, Darbro B, Sidhu A. Mosaicism in BRPF1-Related Neurodevelopmental Disorder: Report of Two Sisters and Literature Review. Case Rep Genet 2023; 2023:1692422. [PMID: 37946714 PMCID: PMC10632058 DOI: 10.1155/2023/1692422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 04/28/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023] Open
Abstract
Bromodomain and PHD finger containing 1 (BRPF1)-related neurodevelopmental disorder is characterized by intellectual disability, developmental delay, hypotonia, dysmorphic facial features, ptosis, and blepharophimosis. Both de novo and inherited pathogenic variants have been previously reported in association with this disorder. We report two affected female siblings with a novel variant in BRPF1 c.2420_2433del (p.Q807Lfs∗27) identified through whole-exome sequencing. Their history of mild intellectual disability, speech delay, attention deficient hyperactivity disorder (ADHD), and ptosis align with the features previously reported in the literature. The absence of the BRPF1 variant in parental buccal samples provides evidence of a de novo frameshift pathogenic variant, most likely as a result of parental gonadal mosaicism, which has not been previously reported. The frameshift pathogenic variant reported here lends further support to haploinsufficiency as the underlying mechanism of disease. We review the literature, compare the clinical features seen in our patients with others reported, and explore the possibility of genotype-phenotype correlation based on the location of pathogenic variants in BRPF1. Our study helps to summarize available knowledge and report the first case of a de novo frameshift pathogenic variant in BRPF1 in two siblings with this neurodevelopmental disorder.
Collapse
Affiliation(s)
- Khaliunaa Bayanbold
- Free Radical Radiation Biology, Department of Radiation Oncology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Georgianne Younger
- Division of Medical Genetics and Genomics, The Stead Family Department of Pediatrics, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Benjamin Darbro
- Division of Medical Genetics and Genomics, The Stead Family Department of Pediatrics, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| | - Alpa Sidhu
- Division of Medical Genetics and Genomics, The Stead Family Department of Pediatrics, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
| |
Collapse
|
6
|
Kose CC, Kaya D, Akcan MB, Silan F. Anemia and thrombocytopenia due to a novel BRPF1 variant in a family from Çanakkale with intellectual disability and dysmorphic facies: Case report and review of the literature. Am J Med Genet A 2023; 191:2209-2214. [PMID: 37190896 DOI: 10.1002/ajmg.a.63244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 02/26/2023] [Accepted: 05/03/2023] [Indexed: 05/17/2023]
Abstract
Intellectual developmental disorder with dysmorphic facies and ptosis (IDDDFP) (MIM#617333) is an autosomal dominant disorder characterized by delayed psychomotor development, intellectual disability (ID), and dysmorphic facial features due to pathogenic variations in the Bromodomain- and PHD Finger-Containing Protein (BRPF1) (MIM#602410) gene. Herein, we report the first Turkish patients with IDDDFP. Additionally, the patients had hematopoietic disorders such as anemia and thrombocytopenia, which have not been previously described in IDDDFP patients. Genetic testing using Whole Exome Sequencing (WES) revealed a novel heterozygous c.1433G > A; p.W478* (NM_004634.3) pathogenic variant on exon 3 of the BRPF1 gene. The patients demonstrated classical features of IDDDFP such as intellectual disability, developmental delay, ptosis, micro and retrognathia, and dysmorphic facial features, in addition to the anemia and thrombocytopenia. Apart from the variant in BRPF1, no additional genomic changes were detected by WES and chromosomal microarray analysis (CMA). Hopefully, our novel report on the hematopoietic anomalies of our patients due to BRPF1 will expand upon the clinical spectrum of IDDDFP, encourage further studies about BRPF1-hematopoietic system relations, and affect the diagnostic and therapeutic schemes of hematopoietic system disorders.
Collapse
Affiliation(s)
- Canan Ceylan Kose
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Faculty of Medicine, Çanakkale, Turkey
| | - Derya Kaya
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Faculty of Medicine, Çanakkale, Turkey
| | - Mehmet Berkay Akcan
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Faculty of Medicine, Çanakkale, Turkey
| | - Fatma Silan
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Faculty of Medicine, Çanakkale, Turkey
| |
Collapse
|
7
|
Tominaga K, Sakashita E, Kasashima K, Kuroiwa K, Nagao Y, Iwamori N, Endo H. Tip60/KAT5 Histone Acetyltransferase Is Required for Maintenance and Neurogenesis of Embryonic Neural Stem Cells. Int J Mol Sci 2023; 24:ijms24032113. [PMID: 36768434 PMCID: PMC9916716 DOI: 10.3390/ijms24032113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/25/2023] Open
Abstract
Epigenetic regulation via epigenetic factors in collaboration with tissue-specific transcription factors is curtail for establishing functional organ systems during development. Brain development is tightly regulated by epigenetic factors, which are coordinately activated or inactivated during processes, and their dysregulation is linked to brain abnormalities and intellectual disability. However, the precise mechanism of epigenetic regulation in brain development and neurogenesis remains largely unknown. Here, we show that Tip60/KAT5 deletion in neural stem/progenitor cells (NSCs) in mice results in multiple abnormalities of brain development. Tip60-deficient embryonic brain led to microcephaly, and proliferating cells in the developing brain were reduced by Tip60 deficiency. In addition, neural differentiation and neuronal migration were severely affected in Tip60-deficient brains. Following neurogenesis in developing brains, gliogenesis started from the earlier stage of development in Tip60-deficient brains, indicating that Tip60 is involved in switching from neurogenesis to gliogenesis during brain development. It was also confirmed in vitro that poor neurosphere formation, proliferation defects, neural differentiation defects, and accelerated astrocytic differentiation in mutant NSCs are derived from Tip60-deficient embryonic brains. This study uncovers the critical role of Tip60 in brain development and NSC maintenance and function in vivo and in vitro.
Collapse
Affiliation(s)
- Kaoru Tominaga
- Division of Structural Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
- Correspondence: (K.T.); (N.I.)
| | - Eiji Sakashita
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
| | - Katsumi Kasashima
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
| | - Kenji Kuroiwa
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
| | - Yasumitsu Nagao
- Center for Experimental Medicine, Jichi Medical University, Tochigi 321-0498, Japan
| | - Naoki Iwamori
- Department of Agriculture, Kyushu University, Fukuoka 819-0395, Japan
- Correspondence: (K.T.); (N.I.)
| | - Hitoshi Endo
- Division of Functional Biochemistry, Department of Biochemistry, Jichi Medical University, Tochigi 321-0498, Japan
| |
Collapse
|
8
|
Viita T, Côté J. The MOZ-BRPF1 acetyltransferase complex in epigenetic crosstalk linked to gene regulation, development, and human diseases. Front Cell Dev Biol 2023; 10:1115903. [PMID: 36712963 PMCID: PMC9873972 DOI: 10.3389/fcell.2022.1115903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 12/29/2022] [Indexed: 01/12/2023] Open
Abstract
Acetylation of lysine residues on histone tails is an important post-translational modification (PTM) that regulates chromatin dynamics to allow gene transcription as well as DNA replication and repair. Histone acetyltransferases (HATs) are often found in large multi-subunit complexes and can also modify specific lysine residues in non-histone substrates. Interestingly, the presence of various histone PTM recognizing domains (reader domains) in these complexes ensures their specific localization, enabling the epigenetic crosstalk and context-specific activity. In this review, we will cover the biochemical and functional properties of the MOZ-BRPF1 acetyltransferase complex, underlining its role in normal biological processes as well as in disease progression. We will discuss how epigenetic reader domains within the MOZ-BRPF1 complex affect its chromatin localization and the histone acetyltransferase specificity of the complex. We will also summarize how MOZ-BRPF1 is linked to development via controlling cell stemness and how mutations or changes in expression levels of MOZ/BRPF1 can lead to developmental disorders or cancer. As a last touch, we will review the latest drug candidates for these two proteins and discuss the therapeutic possibilities.
Collapse
|
9
|
Bukvic N, Chetta M, Bagnulo R, Leotta V, Pantaleo A, Palumbo O, Palumbo P, Oro M, Rivieccio M, Laforgia N, De Rinaldis M, Rosati A, Kerkhof J, Sadikovic B, Resta N. What Have We Learned from Patients Who Have Arboleda-Tham Syndrome Due to a De Novo KAT6A Pathogenic Variant with Impaired Histone Acetyltransferase Function? A Precise Clinical Description May Be Critical for Genetic Testing Approach and Final Diagnosis. Genes (Basel) 2023; 14:165. [PMID: 36672906 PMCID: PMC9859366 DOI: 10.3390/genes14010165] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Pathogenic variants in genes are involved in histone acetylation and deacetylation resulting in congenital anomalies, with most patients displaying a neurodevelopmental disorder and dysmorphism. Arboleda-Tham syndrome caused by pathogenic variants in KAT6A (Lysine Acetyltransferase 6A; OMIM 601408) has been recently described as a new neurodevelopmental disorder. Herein, we describe a patient characterized by complex phenotype subsequently diagnosed using the clinical exome sequencing (CES) with Arboleda-Tham syndrome (ARTHS; OMIM 616268). The analysis revealed the presence of de novo pathogenic variant in KAT6A gene, a nucleotide c.3385C>T substitution that introduces a premature termination codon (p.Arg1129*). The need for straight multidisciplinary collaboration and accurate clinical description findings (bowel obstruction/megacolon/intestinal malrotation) was emphasized, together with the utility of CES in establishing an etiological basis in clinical and genetical heterogeneous conditions. Therefore, considering the phenotypic characteristics, the condition’s rarity and the reviewed literature, we propose additional diagnostic criteria that could help in the development of future clinical diagnostic guidelines. This was possible thanks to objective examinations performed during the long follow-up period, which permitted scrupulous registration of phenotypic changes over time to further assess this rare disorder. Finally, given that different genetic syndromes are associated with distinct genomic DNA methylation patterns used for diagnostic testing and/or as biomarker of disease, a specific episignature for ARTHS has been identified.
Collapse
Affiliation(s)
- Nenad Bukvic
- Medical Genetics Section, University Hospital Consortium Corporation Polyclinics of Bari, 70124 Bari, Italy
| | - Massimiliano Chetta
- U.O.C. Genetica Medica e di Laboratorio, Ospedale Antonio Cardarelli, 80131 Napoli, Italy
| | - Rosanna Bagnulo
- Department of Biomedical Sciences and Human Oncology (DIMO), Division of Medical Genetics, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Valentina Leotta
- Department of Biomedical Sciences and Human Oncology (DIMO), Division of Medical Genetics, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Antonino Pantaleo
- Department of Biomedical Sciences and Human Oncology (DIMO), Division of Medical Genetics, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Orazio Palumbo
- Division of Medical Genetics, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy
| | - Pietro Palumbo
- Division of Medical Genetics, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy
| | - Maria Oro
- U.O.C. Genetica Medica e di Laboratorio, Ospedale Antonio Cardarelli, 80131 Napoli, Italy
| | - Maria Rivieccio
- U.O.C. Genetica Medica e di Laboratorio, Ospedale Antonio Cardarelli, 80131 Napoli, Italy
| | - Nicola Laforgia
- Department of Biomedical Science and Human Oncology (DIMO), Section of Neonatology and Neonatal Intensive Care Unit, University of Bari “Aldo Moro”, 70124 Bari, Italy
| | - Marta De Rinaldis
- Scientific Institute IRCCS “E. Medea”, Unit for Severe Disabilities in Developmental Age and Young Adults (Developmental Neurology and Neurorehabilitation), 72100 Brindisi, Italy
| | - Alessandra Rosati
- Department of Medicine, Surgery and Dentistry “Schola Medica Salernitana”, University of Salerno, 84081 Baronissi, Italy
| | - Jennifer Kerkhof
- Department of Pathology and Laboratory Medicine, Western University, London, ON N6A 3K7, Canada
| | - Bekim Sadikovic
- Department of Pathology and Laboratory Medicine, Western University, London, ON N6A 3K7, Canada
| | - Nicoletta Resta
- Department of Biomedical Sciences and Human Oncology (DIMO), Division of Medical Genetics, University of Bari “Aldo Moro”, 70124 Bari, Italy
| |
Collapse
|
10
|
Zhang C, Lin H, Zhang Y, Xing Q, Zhang J, Zhang D, Liu Y, Chen Q, Zhou T, Wang J, Shan Y, Pan G. BRPF1 bridges H3K4me3 and H3K23ac in human embryonic stem cells and is essential to pluripotency. iScience 2023; 26:105939. [PMID: 36711238 PMCID: PMC9874078 DOI: 10.1016/j.isci.2023.105939] [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: 02/11/2022] [Revised: 10/04/2022] [Accepted: 01/04/2023] [Indexed: 01/07/2023] Open
Abstract
Post-translational modifications (PTMs) on histones play essential roles in cell fate decisions during development. However, how these PTMs are recognized and coordinated remains to be fully illuminated. Here, we show that BRPF1, a multi-histone binding module protein, is essential for pluripotency in human embryonic stem cells (ESCs). BRPF1, H3K4me3, and H3K23ac substantially co-occupy the open chromatin and stemness genes in hESCs. BRPF1 deletion impairs H3K23ac in hESCs and leads to closed chromatin accessibility on stemness genes and hESC differentiation as well. Deletion of the N terminal or PHD-zinc knuckle-PHD (PZP) module in BRPF1 completely impairs its functions in hESCs while PWWP module deletion partially impacts the function. In sum, we reveal BRPF1, the multi-histone binding module protein that bridges the crosstalk between different histone modifications in hESCs to maintain pluripotency.
Collapse
Affiliation(s)
- Cong Zhang
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,University of Chinese Academy of Sciences, Beijing 100049, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Huaisong Lin
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Yanqi Zhang
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,University of Chinese Academy of Sciences, Beijing 100049, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Qi Xing
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,University of Chinese Academy of Sciences, Beijing 100049, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Jingyuan Zhang
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,University of Chinese Academy of Sciences, Beijing 100049, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Di Zhang
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,University of Chinese Academy of Sciences, Beijing 100049, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Yancai Liu
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Qianyu Chen
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Tiancheng Zhou
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Junwei Wang
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
| | - Yongli Shan
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Corresponding author
| | - Guangjin Pan
- CAS Key Laboratory of Regenerative Biology, Centre for Regenerative Medicine and Health, Hong Kong Institute of Science and Innovation, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,University of Chinese Academy of Sciences, Beijing 100049, China,CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, Center for Cell Lineage and Development, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China,Key Lab for Rare & Uncommon Diseases of Shandong Province, Biomedical Sciences College & Shandong Medicinal Biotechnology Centre, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji’nan, Shandong 250117, China,Corresponding author
| |
Collapse
|
11
|
Sy MR, Chauhan J, Prescott K, Imam A, Kraus A, Beleza A, Salkeld L, Hosdurga S, Parker M, Vasudevan P, Islam L, Goel H, Bain N, Park SM, Mohammed S, Dieterich K, Coutton C, Satre V, Vieville G, Donaldson A, Beneteau C, Ghoumid J, Bogaert KVD, Boogaerts A, Boudry E, Vanlerberghe C, Petit F, Bernardini L, Torres B, Mattina T, Carli D, Mandrile G, Pinelli M, Brunetti-Pierri N, Neas K, Beddow R, Tørring PM, Faletra F, Spedicati B, Gasparini P, Mussa A, Ferrero GB, Lampe A, Lam W, Bi W, Bacino CA, Kuwahara A, Bush JO, Zhao X, Luna PN, Shaw CA, Rosenfeld JA, Scott DA. Exome sequencing efficacy and phenotypic expansions involving esophageal atresia/tracheoesophageal fistula plus. Am J Med Genet A 2022; 188:3492-3504. [PMID: 36135330 PMCID: PMC9669235 DOI: 10.1002/ajmg.a.62976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/01/2022] [Accepted: 09/05/2022] [Indexed: 01/31/2023]
Abstract
Esophageal atresia/tracheoesophageal fistula (EA/TEF) is a life-threatening birth defect that often occurs with other major birth defects (EA/TEF+). Despite advances in genetic testing, a molecular diagnosis can only be made in a minority of EA/TEF+ cases. Here, we analyzed clinical exome sequencing data and data from the DECIPHER database to determine the efficacy of exome sequencing in cases of EA/TEF+ and to identify phenotypic expansions involving EA/TEF. Among 67 individuals with EA/TEF+ referred for clinical exome sequencing, a definitive or probable diagnosis was made in 11 cases for an efficacy rate of 16% (11/67). This efficacy rate is significantly lower than that reported for other major birth defects, suggesting that polygenic, multifactorial, epigenetic, and/or environmental factors may play a particularly important role in EA/TEF pathogenesis. Our cohort included individuals with pathogenic or likely pathogenic variants that affect TCF4 and its downstream target NRXN1, and FANCA, FANCB, and FANCC, which are associated with Fanconi anemia. These cases, previously published case reports, and comparisons to other EA/TEF genes made using a machine learning algorithm, provide evidence in support of a potential pathogenic role for these genes in the development of EA/TEF.
Collapse
Affiliation(s)
- Mary R. Sy
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
| | - Jaynee Chauhan
- Yorkshire Regional Genetics Service, Leeds Teaching
Hospitals NHS Trust, Chapel Allerton Hospital, Leeds, UK
| | - Katrina Prescott
- Yorkshire Regional Genetics Service, Leeds Teaching
Hospitals NHS Trust, Chapel Allerton Hospital, Leeds, UK
| | - Aliza Imam
- Yorkshire Regional Genetics Service, Leeds Teaching
Hospitals NHS Trust, Chapel Allerton Hospital, Leeds, UK
| | - Alison Kraus
- Yorkshire Regional Genetics Service, Leeds Teaching
Hospitals NHS Trust, Chapel Allerton Hospital, Leeds, UK
| | - Ana Beleza
- Clinical Genetics Department, University Hospitals Bristol
and Weston, Bristol NHS Foundation, Bristol, UK
| | - Lee Salkeld
- Whiteladies Medical Group, Whatley Road, Clifton, Bristol,
UK
| | - Saraswati Hosdurga
- Community Children’s Health Partnership, Sirona
Health and Care, Bristol, UK
| | - Michael Parker
- Sheffield Children’s NHS Foundation Trust,
Sheffield, UK
| | | | - Lily Islam
- Birmingham Women’s and Children’s Hospital
NHS Foundation Trust, Birmingham, UK
| | - Himanshu Goel
- Hunter New England Local Health District, Hunter Genetics,
Waratah, NSW, Australia
- University of Newcastle, Callaghan, NSW, Australia
| | - Nicole Bain
- Department of Molecular Medicine, New South Wales Health
Pathology, Newcastle, Australia
| | - Soo-Mi Park
- East Anglian Medical Genetics Service, Cambridge
University Hospitals NHS Foundation Trust, Cambridge, UK
| | | | - Klaus Dieterich
- Département de Génétique et
Procréation, Hôpital Couple Enfant, CHU Grenoble, Grenoble Cedex,
France
- INSERM U1216 Grenoble Institut des Neurosciences,
Cellular Myology and Pathology, Grenoble, France
| | - Charles Coutton
- Département de Génétique et
Procréation, Hôpital Couple Enfant, CHU Grenoble, Grenoble Cedex,
France
- Genetic Epigenetic and Therapies of Infertility team,
Institute for Advanced Biosciences, Inserm U 1209, CNRS UMR 5309, Université
Grenoble Alpes, Grenoble, France
| | - Véronique Satre
- Département de Génétique et
Procréation, Hôpital Couple Enfant, CHU Grenoble, Grenoble Cedex,
France
- Genetic Epigenetic and Therapies of Infertility team,
Institute for Advanced Biosciences, Inserm U 1209, CNRS UMR 5309, Université
Grenoble Alpes, Grenoble, France
| | - Gaëlle Vieville
- Département de Génétique et
Procréation, Hôpital Couple Enfant, CHU Grenoble, Grenoble Cedex,
France
| | - Alan Donaldson
- Clinical Genetics Department, St Michaels Hospital,
Bristol, UK
| | - Claire Beneteau
- Nantes Université, CHU de Nantes, UF 9321 de
Fœtopathologie et Génétique, Nantes, France
| | - Jamal Ghoumid
- Université de Lille, ULR7364 RADEME, CHU Lille,
Clinique de Génétique Guy Fontaine, Lille, France
| | - Kris Van Den Bogaert
- Center for Human Genetics, University Hospitals
Leuven–KU Leuven, Leuven, Belgium
| | - Anneleen Boogaerts
- Center for Human Genetics, University Hospitals
Leuven–KU Leuven, Leuven, Belgium
| | - Elise Boudry
- CHU Lille, Institut de Génétique
Médicale, Lille, France
| | - Clémence Vanlerberghe
- Université de Lille, ULR7364 RADEME, CHU Lille,
Clinique de Génétique Guy Fontaine, Lille, France
| | - Florence Petit
- Université de Lille, ULR7364 RADEME, CHU Lille,
Clinique de Génétique Guy Fontaine, Lille, France
| | - Laura Bernardini
- Medical Genetics Unit, Fondazione IRCCS Casa Sollievo
della Sofferenza, San Giovanni Rotondo, Italy
| | - Barbara Torres
- Medical Genetics Unit, Fondazione IRCCS Casa Sollievo
della Sofferenza, San Giovanni Rotondo, Italy
| | - Teresa Mattina
- Department of Biomedical and Biotechnological Sciences,
Medical Genetics, University of Catania, Catania, Italy
- Scientific Foundation and Clinic G. B. Morgagni,
Catania, Italy
| | - Diana Carli
- Department of Public Health and Pediatrics, University
of Torino, Torino, Italy
| | - Giorgia Mandrile
- Medical Genetics Unit, San Luigi University Hospital,
University of Torino, Orbassano, Italy
| | - Michele Pinelli
- Department of Molecular Medicine and Medical
Biotechnology, University of Naples Federico II, Naples, Italy
- Telethon Institute of Genetics and Medicine (TIGEM),
Pozzuoli, Italy
| | - Nicola Brunetti-Pierri
- Telethon Institute of Genetics and Medicine (TIGEM),
Pozzuoli, Italy
- Department of Translational Medicine, University of
Naples Federico II, Naples, Italy
| | | | - Rachel Beddow
- Wellington Regional Genetics laboratory, Wellington, New
Zealand
| | - Pernille M. Tørring
- Department of Clinical Genetics, Odense University
Hospital, Odense C, Denmark
| | - Flavio Faletra
- Institute for Maternal and Child Health - IRCCS Burlo
Garofolo, Trieste, Italy
| | - Beatrice Spedicati
- Department of Medicine, Surgery and Health Sciences,
University of Trieste, Trieste, Italy
| | - Paolo Gasparini
- Institute for Maternal and Child Health - IRCCS Burlo
Garofolo, Trieste, Italy
- Department of Medicine, Surgery and Health Sciences,
University of Trieste, Trieste, Italy
| | - Alessandro Mussa
- Department of Public Health and Pediatrics, University
of Torino, Torino, Italy
- Pediatric Clinical Genetics Unit, Regina Margherita
Childrens Hospital, Torino, Italy
| | | | - Anne Lampe
- South East Scotland Clinical Genetics Service, Western
General Hospital, Edinburgh, UK
| | - Wayne Lam
- Department of Clinical Genetics, Western General
Hospital, Edinburgh, UK
| | - Weimin Bi
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
- Baylor Genetics, Houston, TX, 77021, USA
| | - Carlos A. Bacino
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
| | - Akela Kuwahara
- Department of Cell and Tissue Biology, University of
California San Francisco, San Francisco, USA
- Institute for Human Genetics, University of California
San Francisco, San Francisco, USA
- Eli and Edythe Broad Center of Regeneration Medicine and
Stem Cell Research, University of California San Francisco, San Francisco, USA
| | - Jeffrey O. Bush
- Department of Cell and Tissue Biology, University of
California San Francisco, San Francisco, USA
- Institute for Human Genetics, University of California
San Francisco, San Francisco, USA
- Eli and Edythe Broad Center of Regeneration Medicine and
Stem Cell Research, University of California San Francisco, San Francisco, USA
| | - Xiaonan Zhao
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
- Baylor Genetics, Houston, TX, 77021, USA
| | - Pamela N. Luna
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
| | - Chad A. Shaw
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
| | - Jill A. Rosenfeld
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
| | - Daryl A. Scott
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, TX, USA
- Department of Molecular Physiology and Biophysics,
Baylor College of Medicine, Houston, TX, USA
| |
Collapse
|
12
|
Abarca-Barriga HH, Chavesta Velásquez F, Punil Luciano R. Intellectual developmental disorder with dysmorphic facies and ptosis caused by copy number variation including the BRPF1 gene in Peruvian patient. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00356-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Intellectual developmental disorder with dysmorphic facies and ptosis (MIM #617333) is a very rare condition, characterized by more than 80% by language delay, intellectual disability, gross motor development delay, broad nasal bridge, hypertelorism, and hypotonia. This condition exhibits as autosomal dominant inheritance and is caused by a heterozygous variant in the BRPF1 gene. Additionally, the copy number variation in the terminal region of chromosome 3p (MIM #613792) has been shown to manifest in most patients as intellectual disability, motor delay, and hypotonia.
Case presentation
We present an 18-year-old male patient with facial dysmorphism, intellectual disability, ptosis, and congenital heart disease. Using chromosomal microarray analysis, a previously unreported 90 kb deletion involving seven genes was found.
Conclusion
When comparing our findings with 39 previous reports, we found that the common clinical features of this syndrome, such as gross motor delay, hypotonia, and congenital spinal cord abnormalities, were not observed in this patient. From the seven genes implicated in the deletion, only BRPF1 could be strongly correlated with the phenotype, according to its function and haploinsufficiency coefficients.
Collapse
|
13
|
Genetic aetiologies for childhood speech disorder: novel pathways co-expressed during brain development. Mol Psychiatry 2022; 28:1647-1663. [PMID: 36117209 DOI: 10.1038/s41380-022-01764-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Childhood apraxia of speech (CAS), the prototypic severe childhood speech disorder, is characterized by motor programming and planning deficits. Genetic factors make substantive contributions to CAS aetiology, with a monogenic pathogenic variant identified in a third of cases, implicating around 20 single genes to date. Here we aimed to identify molecular causation in 70 unrelated probands ascertained with CAS. We performed trio genome sequencing. Our bioinformatic analysis examined single nucleotide, indel, copy number, structural and short tandem repeat variants. We prioritised appropriate variants arising de novo or inherited that were expected to be damaging based on in silico predictions. We identified high confidence variants in 18/70 (26%) probands, almost doubling the current number of candidate genes for CAS. Three of the 18 variants affected SETBP1, SETD1A and DDX3X, thus confirming their roles in CAS, while the remaining 15 occurred in genes not previously associated with this disorder. Fifteen variants arose de novo and three were inherited. We provide further novel insights into the biology of child speech disorder, highlighting the roles of chromatin organization and gene regulation in CAS, and confirm that genes involved in CAS are co-expressed during brain development. Our findings confirm a diagnostic yield comparable to, or even higher, than other neurodevelopmental disorders with substantial de novo variant burden. Data also support the increasingly recognised overlaps between genes conferring risk for a range of neurodevelopmental disorders. Understanding the aetiological basis of CAS is critical to end the diagnostic odyssey and ensure affected individuals are poised for precision medicine trials.
Collapse
|
14
|
Zu G, Liu Y, Cao J, Zhao B, Zhang H, You L. BRPF1-KAT6A/KAT6B Complex: Molecular Structure, Biological Function and Human Disease. Cancers (Basel) 2022; 14:cancers14174068. [PMID: 36077605 PMCID: PMC9454415 DOI: 10.3390/cancers14174068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 11/16/2022] Open
Abstract
The bromodomain and PHD finger–containing protein1 (BRPF1) is a member of family IV of the bromodomain-containing proteins that participate in the post-translational modification of histones. It functions in the form of a tetrameric complex with a monocytic leukemia zinc finger protein (MOZ or KAT6A), MOZ-related factor (MORF or KAT6B) or HAT bound to ORC1 (HBO1 or KAT7) and two small non-catalytic proteins, the inhibitor of growth 5 (ING5) or the paralog ING4 and MYST/Esa1-associated factor 6 (MEAF6). Mounting studies have demonstrated that all the four core subunits play crucial roles in different biological processes across diverse species, such as embryonic development, forebrain development, skeletal patterning and hematopoiesis. BRPF1, KAT6A and KAT6B mutations were identified as the cause of neurodevelopmental disorders, leukemia, medulloblastoma and other types of cancer, with germline mutations associated with neurodevelopmental disorders displaying intellectual disability, and somatic variants associated with leukemia, medulloblastoma and other cancers. In this paper, we depict the molecular structures and biological functions of the BRPF1-KAT6A/KAT6B complex, summarize the variants of the complex related to neurodevelopmental disorders and cancers and discuss future research directions and therapeutic potentials.
Collapse
Affiliation(s)
- Gaoyu Zu
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Ying Liu
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Jingli Cao
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Baicheng Zhao
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Hang Zhang
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Linya You
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
- Shanghai Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention, Fudan University, Shanghai 200040, China
- Correspondence:
| |
Collapse
|
15
|
Corgiat EB, List SM, Rounds JC, Yu D, Chen P, Corbett AH, Moberg KH. The Nab2 RNA-binding protein patterns dendritic and axonal projections through a planar cell polarity-sensitive mechanism. G3 (BETHESDA, MD.) 2022; 12:jkac100. [PMID: 35471546 PMCID: PMC9157165 DOI: 10.1093/g3journal/jkac100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/19/2022] [Indexed: 11/15/2022]
Abstract
RNA-binding proteins support neurodevelopment by modulating numerous steps in post-transcriptional regulation, including splicing, export, translation, and turnover of mRNAs that can traffic into axons and dendrites. One such RNA-binding protein is ZC3H14, which is lost in an inherited intellectual disability. The Drosophila melanogaster ZC3H14 ortholog, Nab2, localizes to neuronal nuclei and cytoplasmic ribonucleoprotein granules and is required for olfactory memory and proper axon projection into brain mushroom bodies. Nab2 can act as a translational repressor in conjunction with the Fragile-X mental retardation protein homolog Fmr1 and shares target RNAs with the Fmr1-interacting RNA-binding protein Ataxin-2. However, neuronal signaling pathways regulated by Nab2 and their potential roles outside of mushroom body axons remain undefined. Here, we present an analysis of a brain proteomic dataset that indicates that multiple planar cell polarity proteins are affected by Nab2 loss, and couple this with genetic data that demonstrate that Nab2 has a previously unappreciated role in restricting the growth and branching of dendrites that elaborate from larval body-wall sensory neurons. Further analysis confirms that Nab2 loss sensitizes sensory dendrites to the genetic dose of planar cell polarity components and that Nab2-planar cell polarity genetic interactions are also observed during Nab2-dependent control of axon projection in the central nervous system mushroom bodies. Collectively, these data identify the conserved Nab2 RNA-binding protein as a likely component of post-transcriptional mechanisms that limit dendrite growth and branching in Drosophila sensory neurons and genetically link this role to the planar cell polarity pathway. Given that mammalian ZC3H14 localizes to dendritic spines and controls spine density in hippocampal neurons, these Nab2-planar cell polarity genetic data may highlight a conserved path through which Nab2/ZC3H14 loss affects morphogenesis of both axons and dendrites in diverse species.
Collapse
Affiliation(s)
- Edwin B Corgiat
- Department of Cell Biology, Emory University School of Medicine, Emory University, Atlanta, GA 30322, USA
- Department of Biology, Emory University, Atlanta, GA 30322, USA
- Genetics and Molecular Biology Graduate Program, Emory University, Atlanta, GA 30322, USA
| | - Sara M List
- Neuroscience Graduate Program, Emory University, Atlanta, GA 30322, USA
| | - J Christopher Rounds
- Department of Cell Biology, Emory University School of Medicine, Emory University, Atlanta, GA 30322, USA
- Department of Biology, Emory University, Atlanta, GA 30322, USA
- Genetics and Molecular Biology Graduate Program, Emory University, Atlanta, GA 30322, USA
| | - Dehong Yu
- Department of Cell Biology, Emory University School of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Ping Chen
- Department of Cell Biology, Emory University School of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Anita H Corbett
- Department of Biology, Emory University, Atlanta, GA 30322, USA
| | - Kenneth H Moberg
- Department of Cell Biology, Emory University School of Medicine, Emory University, Atlanta, GA 30322, USA
| |
Collapse
|
16
|
Souza J, do Valle DA, Santos MLSF, Colomé FB, Teive HAG, da Silva Freitas R, Herai RH. BRPF1-associated syndrome: A patient with congenital ptosis, neurological findings, and normal intellectual development. Am J Med Genet A 2022; 188:1875-1880. [PMID: 35243762 DOI: 10.1002/ajmg.a.62706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 01/26/2022] [Accepted: 02/05/2022] [Indexed: 01/15/2023]
Abstract
In 2017, Mattiolli et al. and Yan et al. described a series of patients with clinical findings essentially characterized by intellectual disabilities, ptosis, hypotonia, epilepsy, and weakness. They also found in these patients distinct heterozygous mutations in the BRPF1 gene, which plays a role in epigenetic regulation by promoting histone acetylation. The disease is known as Intellectual Developmental Disorder with Dysmorphic Facies and Ptosis (IDDDFP, OMIM #617333). Later, another 20 patients were also described by distinct reports, suggesting IDDDFP could be a more frequent cause of intellectual disability as it was thought before. Here, we describe a patient with normal intellectual development who had congenital ptosis, hypotonia, muscular weakness, atlanto-axial malformation, and pyramidal at the neurological examination. The patient has a rare nonsense variant on exon 3 of BRPF1 gene. We also describe a phenotypic amplification for conditions related to deficiency in histone modifications.
Collapse
Affiliation(s)
- Josiane Souza
- School of Medicine, Pontificia Universidade Católica do Paraná (PUCPR), Curitiba, Puerto Rico, Brazil.,Department of Genetics, Hospital Infantil Pequeno Príncipe, Curitiba, Puerto Rico, Brazil
| | - Daniel Almeida do Valle
- Department of Pediatric Neurology, Hospital Infantil Pequeno Príncipe, Curitiba, Puerto Rico, Brazil
| | | | - Fernanda Bonilla Colomé
- Department of Pediatric Neurology, Hospital Infantil Pequeno Príncipe, Curitiba, Puerto Rico, Brazil
| | | | | | - Roberto Hirochi Herai
- School of Medicine, Pontificia Universidade Católica do Paraná (PUCPR), Curitiba, Puerto Rico, Brazil.,Laboratory of Bioinformatics and Neurogenetics (LaBiN), Experimental Multiuser Laboratory (LEM), Graduate Program in Health Sciences, School of Medicine, Pontificia Universidade Católica do Paraná (PUCPR), Curitiba, Puerto Rico, Brazil.,Research Division, Buko Kaesemodel Institute, Curitiba, Puerto Rico, Brazil
| |
Collapse
|
17
|
Wilson KD, Porter EG, Garcia BA. Reprogramming of the epigenome in neurodevelopmental disorders. Crit Rev Biochem Mol Biol 2022; 57:73-112. [PMID: 34601997 PMCID: PMC9462920 DOI: 10.1080/10409238.2021.1979457] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The etiology of neurodevelopmental disorders (NDDs) remains a challenge for researchers. Human brain development is tightly regulated and sensitive to cellular alterations caused by endogenous or exogenous factors. Intriguingly, the surge of clinical sequencing studies has revealed that many of these disorders are monogenic and monoallelic. Notably, chromatin regulation has emerged as highly dysregulated in NDDs, with many syndromes demonstrating phenotypic overlap, such as intellectual disabilities, with one another. Here we discuss epigenetic writers, erasers, readers, remodelers, and even histones mutated in NDD patients, predicted to affect gene regulation. Moreover, this review focuses on disorders associated with mutations in enzymes involved in histone acetylation and methylation, and it highlights syndromes involving chromatin remodeling complexes. Finally, we explore recently discovered histone germline mutations and their pathogenic outcome on neurological function. Epigenetic regulators are mutated at every level of chromatin organization. Throughout this review, we discuss mechanistic investigations, as well as various animal and iPSC models of these disorders and their usefulness in determining pathomechanism and potential therapeutics. Understanding the mechanism of these mutations will illuminate common pathways between disorders. Ultimately, classifying these disorders based on their effects on the epigenome will not only aid in prognosis in patients but will aid in understanding the role of epigenetic machinery throughout neurodevelopment.
Collapse
Affiliation(s)
- Khadija D. Wilson
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Elizabeth G. Porter
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Benjamin A. Garcia
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| |
Collapse
|
18
|
Xian W, Cao J, Yuan X, Wang G, Jin Q, Zhang H, Zhou G, You L. Deficiency of Intellectual Disability-Related Gene Brpf1 Attenuated Hippocampal Excitatory Synaptic Transmission and Impaired Spatial Learning and Memory Ability. Front Cell Dev Biol 2021; 9:711792. [PMID: 34485298 PMCID: PMC8415984 DOI: 10.3389/fcell.2021.711792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 07/22/2021] [Indexed: 11/13/2022] Open
Abstract
Patients with monoallelic bromodomain and PHD finger-containing protein 1 (BRPF1) mutations showed intellectual disability. The hippocampus has essential roles in learning and memory. Our previous work indicated that Brpf1 was specifically and strongly expressed in the hippocampus from the perinatal period to adulthood. We hypothesized that mouse Brpf1 plays critical roles in the morphology and function of hippocampal neurons, and its deficiency leads to learning and memory deficits. To test this, we performed immunofluorescence, whole-cell patch clamp, and mRNA-Seq on shBrpf1-infected primary cultured hippocampal neurons to study the effect of Brpf1 knockdown on neuronal morphology, electrophysiological characteristics, and gene regulation. In addition, we performed stereotactic injection into adult mouse hippocampus to knock down Brpf1 in vivo and examined the learning and memory ability by Morris water maze. We found that mild knockdown of Brpf1 reduced mEPSC frequency of cultured hippocampal neurons, before any significant changes of dendritic morphology showed. We also found that Brpf1 mild knockdown in the hippocampus showed a decreasing trend on the spatial learning and memory ability of mice. Finally, mRNA-Seq analyses showed that genes related to learning, memory, and synaptic transmission (such as C1ql1, Gpr17, Htr1d, Glra1, Cxcl10, and Grin2a) were dysregulated upon Brpf1 knockdown. Our results showed that Brpf1 mild knockdown attenuated hippocampal excitatory synaptic transmission and reduced spatial learning and memory ability, which helps explain the symptoms of patients with BRPF1 mutations.
Collapse
Affiliation(s)
- Weiwei Xian
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Jingli Cao
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Xiangshan Yuan
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Guoxiang Wang
- Institutes of Brain Sciences, Fudan University, Shanghai, China
| | - Qiuyan Jin
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Hang Zhang
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Guomin Zhou
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China.,Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai, China
| | - Linya You
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai, China.,Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai, China
| |
Collapse
|
19
|
Fetal Cystic Hygroma Associated with Terminal 2p25.1 Duplication and Terminal 3p25.3 Deletion: Cytogenetic, Fluorescent in Situ Hybridization and Microarray Familial Characterization of Two Different Chromosomal Structural Rearrangements. Balkan J Med Genet 2021; 23:79-86. [PMID: 33816076 PMCID: PMC8009571 DOI: 10.2478/bjmg-2020-0023] [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] [Indexed: 11/25/2022] Open
Abstract
We report a prenatally diagnosed case of partial trisomy 2p and partial monosomy 3p, resulting from unbalanced translocation (2;3)(p25.1;p25.3) of paternal origin. Parents were non consanguineous Caucasians, with familial history of recurrent miscarriages on the father’s side. Detailed sonographic examination of the fetus showed a septated cystic hygroma measuring 6 mm at 13 weeks’ gestation. Karyotyping and fluorescent in situ hybridization (FISH) analysis of cultured amniotic fluid cells revealed an unbalanced translocation der(3)t(2;3)(p25.1; p25.3) and apparently balanced inv(3)(p13p25.3) in a fetus. Parental cytogenetic evaluation using karyotyping and FISH analysis showed the presence of both a balanced translocation and a paracentric inversion in father t(2;3) (p25.1;p25.3) inv(3)(p13p25.3). Microarray analysis showed a 11.6 Mb deletion at 3p26.3-p25.3 and duplication of 10.5 Mb at the 2p25.3-p25 region. The duplicated region at 2p25.1p25.3 contains 45 different genes, where 12 are reported as OMIM morbid genes with different phenotypical implications. The deleted region at 3p26.3-p25.3 contains 65 genes, out of which 27 are OMIM genes. Three of these (CNTN4, SETD5 and VHL) were curated by Clingene Dosage Gene Map and were given a high haplo-insufficiency score. Genes affected by the unbalanced translocation could have contributed to some specific phenotypic changes of the fetus in late pregnancy. The application of different cytogenetic methods was essential in our case, allowing the detection of different types of structural chromosomal aberrations and more thorough genetic counseling for future pregnancies.
Collapse
|
20
|
Cao J, Xian W, Palihati M, Zhu Y, Wang G, Xie Y, Zhou G, You L. Deficiency of intellectual disability-related gene Brpf1 reduced inhibitory neurotransmission in MGE-derived GABAergic interneurons. G3-GENES GENOMES GENETICS 2021; 11:6179329. [PMID: 33744924 PMCID: PMC8496217 DOI: 10.1093/g3journal/jkab090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 03/09/2021] [Indexed: 12/13/2022]
Abstract
Intellectual disability is closely related to impaired GABA neurotransmission. Brpf1 was specifically expressed in medial ganglionic eminence (MGE), a developmental niche of GABAergic interneurons, and patients with BRPF1 mutations showed intellectual disability. To test its role in the development and function of MGE-derived GABAergic interneurons, we performed immunofluorescence staining, whole-cell patch-clamp, MGE transplantation, and mRNA-Seq to understand its effect on neuronal differentiation, dendritic morphology, electrophysiology, migration, and gene regulation, using mouse MGE-derived GABAergic interneurons infected with AAV-shBrpf1. The results showed that Brpf1 knockdown had a decreasing trend, although not significant, on the differentiation of GABAergic interneurons into parvalbumin+ interneurons. Moreover, increased firing threshold, decreased number of evoked action potentials, and a reduced amplitude of miniature inhibitory postsynaptic currents were observed before any significant change of MAP2+ dendritic morphology and in vivo migration ability appeared. Finally, mRNA-Seq analysis revealed that genes related to neurodevelopment and synaptic transmission such as Map2k7 were dysregulated. Our results demonstrated a key role of Brpf1 in inhibitory neurotransmission and related gene expression of GABAergic interneurons.
Collapse
Affiliation(s)
- Jingli Cao
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Weiwei Xian
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Maierdan Palihati
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Yu Zhu
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Guoxiang Wang
- Institutes of Brain Sciences, Fudan University, Shanghai 200032, China
| | - Yunli Xie
- Institutes of Brain Sciences, Fudan University, Shanghai 200032, China
| | - Guomin Zhou
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.,Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai 200032, China
| | - Linya You
- Department of Human Anatomy & Histoembryology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.,Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai 200032, China
| |
Collapse
|
21
|
Haug P, Koller S, Maggi J, Lang E, Feil S, Wlodarczyk A, Bähr L, Steindl K, Rohrbach M, Gerth-Kahlert C, Berger W. Whole Exome Sequencing in Coloboma/Microphthalmia: Identification of Novel and Recurrent Variants in Seven Genes. Genes (Basel) 2021; 12:65. [PMID: 33418956 PMCID: PMC7825129 DOI: 10.3390/genes12010065] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/25/2020] [Accepted: 12/31/2020] [Indexed: 12/16/2022] Open
Abstract
Coloboma and microphthalmia (C/M) are related congenital eye malformations, which can cause significant visual impairment. Molecular diagnosis is challenging as the genes associated to date with C/M account for only a small percentage of cases. Overall, the genetic cause remains unknown in up to 80% of patients. High throughput DNA sequencing technologies, including whole-exome sequencing (WES), are therefore a useful and efficient tool for genetic screening and identification of new mutations and novel genes in C/M. In this study, we analyzed the DNA of 19 patients with C/M from 15 unrelated families using singleton WES and data analysis for 307 genes of interest. We identified seven novel and one recurrent potentially disease-causing variants in CRIM1, CHD7, FAT1, PTCH1, PUF60, BRPF1, and TGFB2 in 47% of our families, three of which occurred de novo. The detection rate in patients with ocular and extraocular manifestations (67%) was higher than in patients with an isolated ocular phenotype (46%). Our study highlights the significant genetic heterogeneity in C/M cohorts and emphasizes the diagnostic power of WES for the screening of patients and families with C/M.
Collapse
Affiliation(s)
- Patricia Haug
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
| | - Samuel Koller
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
| | - Jordi Maggi
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
| | - Elena Lang
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
- Department of Ophthalmology, University Hospital and University of Zurich, 8091 Zurich, Switzerland;
| | - Silke Feil
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
| | - Agnès Wlodarczyk
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
| | - Luzy Bähr
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
| | - Katharina Steindl
- Institute of Medical Genetics, University of Zurich, 8952 Schlieren, Switzerland;
| | - Marianne Rohrbach
- Division of Metabolism and Children’s Research Centre, University Children’s Hospital Zurich, 8032 Zurich, Switzerland;
| | - Christina Gerth-Kahlert
- Department of Ophthalmology, University Hospital and University of Zurich, 8091 Zurich, Switzerland;
| | - Wolfgang Berger
- Institute of Medical Molecular Genetics, University of Zurich, 8952 Schlieren, Switzerland; (P.H.); (S.K.); (J.M.); (E.L.); (S.F.); (A.W.); (L.B.)
- Neuroscience Center Zurich (ZNZ), University and ETH Zurich, 8006 Zurich, Switzerland
- Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, 8006 Zurich, Switzerland
| |
Collapse
|
22
|
Iyer H, Wahul AB, P K A, Sawant BS, Kumar A. A BRD's (BiRD's) eye view of BET and BRPF bromodomains in neurological diseases. Rev Neurosci 2021; 32:403-426. [PMID: 33661583 DOI: 10.1515/revneuro-2020-0067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/11/2020] [Indexed: 01/18/2023]
Abstract
Neurological disorders (NLDs) are among the top leading causes for disability worldwide. Dramatic changes in the epigenetic topography of the brain and nervous system have been found in many NLDs. Histone lysine acetylation has prevailed as one of the well characterised epigenetic modifications in these diseases. Two instrumental components of the acetylation machinery are the evolutionarily conserved Bromodomain and PHD finger containing (BRPF) and Bromo and Extra terminal domain (BET) family of proteins, also referred to as acetylation 'readers'. Several reasons, including their distinct mechanisms of modulation of gene expression and their property of being highly tractable small molecule targets, have increased their translational relevance. Thus, compounds which demonstrated promising results in targeting these proteins have advanced to clinical trials. They have been established as key role players in pathologies of cancer, cardiac diseases, renal diseases and rheumatic diseases. In addition, studies implicating the role of these bromodomains in NLDs are gaining pace. In this review, we highlight the findings of these studies, and reason for the plausible roles of all BET and BRPF members in NLDs. A comprehensive understanding of their multifaceted functions would be radical in the development of therapeutic interventions.
Collapse
Affiliation(s)
- Harish Iyer
- Epigenetics and Neuropsychiatric Disorders' Laboratory, CSIR - Centre for Cellular and Molecular Biology (CCMB), Hyderabad500007, India
| | - Abhipradnya B Wahul
- Epigenetics and Neuropsychiatric Disorders' Laboratory, CSIR - Centre for Cellular and Molecular Biology (CCMB), Hyderabad500007, India
| | - Annapoorna P K
- Epigenetics and Neuropsychiatric Disorders' Laboratory, CSIR - Centre for Cellular and Molecular Biology (CCMB), Hyderabad500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
| | - Bharvi S Sawant
- Epigenetics and Neuropsychiatric Disorders' Laboratory, CSIR - Centre for Cellular and Molecular Biology (CCMB), Hyderabad500007, India
| | - Arvind Kumar
- Epigenetics and Neuropsychiatric Disorders' Laboratory, CSIR - Centre for Cellular and Molecular Biology (CCMB), Hyderabad500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad201002, India
| |
Collapse
|
23
|
Fu J, Wang T, Fu Z, Li T, Zhang X, Zhao J, Yang G. Case Report: A Case Report and Literature Review of 3p Deletion Syndrome. Front Pediatr 2021; 9:618059. [PMID: 33643973 PMCID: PMC7902511 DOI: 10.3389/fped.2021.618059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 01/14/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: The aim of the present study is to explore the clinical and genetic characteristics of 3p deletion syndrome to improve clinicians' understanding of the disease. Methods: The clinical manifestations, process of diagnosis and treatment, and genetic characteristics of an individual case of 3p deletion syndrome were analyzed. CNKI, Wanfang Data, and the Biomedical Literature Database (PubMed) were searched. The search time limit, using "3p deletion syndrome" and "BRPF1" as keywords, was from the creation of the database up to June 2020. Related data were reviewed. Results: The proband was a male child with general developmental and intellectual disabilities, special facial features and congenital heart disease. The child was the parents' first pregnancy and first born. Gene microarray analysis showed a 10.095 Mb deletion in the 3p26.3-p25.3 region, resulting in a heterozygous mutation of the BRPF1 gene; thus, the patient was diagnosed with 3p deletion syndrome. At the time of diagnosis, the child was 1 year of age and was responding to comprehensive rehabilitation training. A total of 29 well-documented cases were found in the literature, of which 19 cases had an onset within 1 year of birth, and mainly manifested with mental and motor development disabilities and abnormal facial features, with different gene deletions, depending on the size and location of the 3p deletion. Conclusion: The genetic test results of the child in this study indicated a heterozygous deletion of the BRPF1 gene on the short arm of chromosome 3, which was a unique feature of this study, since it was rarely mentioned in other reports of 3p deletion syndrome. The clinical phenotype of this syndrome is complex as it can include intellectual and motor development backwardness, low muscle tone, certain abnormal facial features (low hairline, bilateral ptosis, widely spaced eyes, a forward nose, left ear auricle deformity, a high-arched palate, a small jaw), and the deformation of systems such as the gastrointestinal tract and the urinary tract malformation or symptoms of epilepsy. As clinical manifestations can be relatively mild, the syndrome is easy to miss or misdiagnose. Clinical workers need to be aware of this disease when they find that children have special features, such as stunted growth, low muscle tone or ptosis, and it needs to be diagnosed through genetic testing. Most children are able to develop certain social skills after rehabilitation treatment.
Collapse
Affiliation(s)
- Junxian Fu
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Ting Wang
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Zhuo Fu
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Tianxia Li
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Xiaomeng Zhang
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Jingjing Zhao
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Guanglu Yang
- Department of Pediatric, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| |
Collapse
|
24
|
Provenzano A, La Barbera A, Scagnet M, Pagliazzi A, Traficante G, Pantaleo M, Tiberi L, Vergani D, Kurtas NE, Guarducci S, Bargiacchi S, Forzano G, Artuso R, Palazzo V, Kura A, Giordano F, di Feo D, Mortilla M, De Filippi C, Mattei G, Garavelli L, Giusti B, Genitori L, Zuffardi O, Giglio S. Chiari 1 malformation and exome sequencing in 51 trios: the emerging role of rare missense variants in chromatin-remodeling genes. Hum Genet 2020; 140:625-647. [PMID: 33337535 PMCID: PMC7981314 DOI: 10.1007/s00439-020-02231-6] [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: 08/04/2020] [Accepted: 10/20/2020] [Indexed: 02/07/2023]
Abstract
Type 1 Chiari malformation (C1M) is characterized by cerebellar tonsillar herniation of 3–5 mm or more, the frequency of which is presumably much higher than one in 1000 births, as previously believed. Its etiology remains undefined, although a genetic basis is strongly supported by C1M presence in numerous genetic syndromes associated with different genes. Whole-exome sequencing (WES) in 51 between isolated and syndromic pediatric cases and their relatives was performed after confirmation of the defect by brain magnetic resonance image (MRI). Moreover, in all the cases showing an inherited candidate variant, brain MRI was performed in both parents and not only in the carrier one to investigate whether the defect segregated with the variant. More than half of the variants were Missense and belonged to the same chromatin-remodeling genes whose protein truncation variants are associated with severe neurodevelopmental syndromes. In the remaining cases, variants have been detected in genes with a role in cranial bone sutures, microcephaly, neural tube defects, and RASopathy. This study shows that the frequency of C1M is widely underestimated, in fact many of the variants, in particular those in the chromatin-remodeling genes, were inherited from a parent with C1M, either asymptomatic or with mild symptoms. In addition, C1M is a Mendelian trait, in most cases inherited as dominant. Finally, we demonstrate that modifications of the genes that regulate chromatin architecture can cause localized anatomical alterations, with symptoms of varying degrees.
Collapse
Affiliation(s)
- Aldesia Provenzano
- Medical Genetics Unit, Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy.
| | - Andrea La Barbera
- Medical Genetics Unit, Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Mirko Scagnet
- Department of Neurosurgery, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Angelica Pagliazzi
- Medical Genetics Unit, Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Giovanna Traficante
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Marilena Pantaleo
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Lucia Tiberi
- Medical Genetics Unit, Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Debora Vergani
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Nehir Edibe Kurtas
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Silvia Guarducci
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Sara Bargiacchi
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Giulia Forzano
- Medical Genetics Unit, Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy
| | - Rosangela Artuso
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Viviana Palazzo
- Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Ada Kura
- Department of Experimental and Clinical Medicine, Atherothrombotic Diseases Center, University of Florence, Careggi Hospital, Florence, Italy
| | - Flavio Giordano
- Department of Neurosurgery, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Daniele di Feo
- Department of Radiology, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Marzia Mortilla
- Department of Radiology, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Claudio De Filippi
- Department of Radiology, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Gianluca Mattei
- Department of Information Engineering, University of Florence, Florence, Italy
| | - Livia Garavelli
- Medical Genetics Unit, Department of Mother and Child, Azienda Unità Sanitaria Locale-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | - Betti Giusti
- Department of Experimental and Clinical Medicine, Atherothrombotic Diseases Center, University of Florence, Careggi Hospital, Florence, Italy
| | - Lorenzo Genitori
- Department of Neurosurgery, "A. Meyer" Children Hospital of Florence, Florence, Italy
| | - Orsetta Zuffardi
- Unit of Medical Genetics, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Sabrina Giglio
- Medical Genetics Unit, Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence, Florence, Italy.,Medical Genetics Unit, "A. Meyer" Children Hospital of Florence, Florence, Italy
| |
Collapse
|
25
|
Pathogenic 12-kb copy-neutral inversion in syndromic intellectual disability identified by high-fidelity long-read sequencing. Genomics 2020; 113:1044-1053. [PMID: 33157260 DOI: 10.1016/j.ygeno.2020.10.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/08/2020] [Accepted: 10/31/2020] [Indexed: 01/07/2023]
Abstract
We report monozygotic twin girls with syndromic intellectual disability who underwent exome sequencing but with negative pathogenic variants. To search for variants that are unrecognized by exome sequencing, high-fidelity long-read genome sequencing (HiFi LR-GS) was applied. A 12-kb copy-neutral inversion was precisely identified by HiFi LR-GS after trio-based variant filtering. This inversion directly disrupted two genes, CPNE9 and BRPF1, the latter of which attracted our attention because pathogenic BRPF1 variants have been identified in autosomal dominant intellectual developmental disorder with dysmorphic facies and ptosis (IDDDFP), which later turned out to be clinically found in the twins. Trio-based HiFi LR-GS together with haplotype phasing revealed that the 12-kb inversion occurred de novo on the maternally transmitted chromosome. This study clearly indicates that submicroscopic copy-neutral inversions are important but often uncharacterized culprits in monogenic disorders and that long-read sequencing is highly advantageous for detecting such inversions involved in genetic diseases.
Collapse
|
26
|
Li L, Ghorbani M, Weisz-Hubshman M, Rousseau J, Thiffault I, Schnur RE, Breen C, Oegema R, Weiss MM, Waisfisz Q, Welner S, Kingston H, Hills JA, Boon EM, Basel-Salmon L, Konen O, Goldberg-Stern H, Bazak L, Tzur S, Jin J, Bi X, Bruccoleri M, McWalter K, Cho MT, Scarano M, Schaefer GB, Brooks SS, Hughes SS, van Gassen KLI, van Hagen JM, Pandita TK, Agrawal PB, Campeau PM, Yang XJ. Lysine acetyltransferase 8 is involved in cerebral development and syndromic intellectual disability. J Clin Invest 2020; 130:1431-1445. [PMID: 31794431 DOI: 10.1172/jci131145] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 11/21/2019] [Indexed: 12/15/2022] Open
Abstract
Epigenetic integrity is critical for many eukaryotic cellular processes. An important question is how different epigenetic regulators control development and influence disease. Lysine acetyltransferase 8 (KAT8) is critical for acetylation of histone H4 at lysine 16 (H4K16), an evolutionarily conserved epigenetic mark. It is unclear what roles KAT8 plays in cerebral development and human disease. Here, we report that cerebrum-specific knockout mice displayed cerebral hypoplasia in the neocortex and hippocampus, along with improper neural stem and progenitor cell (NSPC) development. Mutant cerebrocortical neuroepithelia exhibited faulty proliferation, aberrant neurogenesis, massive apoptosis, and scant H4K16 propionylation. Mutant NSPCs formed poor neurospheres, and pharmacological KAT8 inhibition abolished neurosphere formation. Moreover, we describe KAT8 variants in 9 patients with intellectual disability, seizures, autism, dysmorphisms, and other anomalies. The variants altered chromobarrel and catalytic domains of KAT8, thereby impairing nucleosomal H4K16 acetylation. Valproate was effective for treating epilepsy in at least 2 of the individuals. This study uncovers a critical role of KAT8 in cerebral and NSPC development, identifies 9 individuals with KAT8 variants, and links deficient H4K16 acylation directly to intellectual disability, epilepsy, and other developmental anomalies.
Collapse
Affiliation(s)
- Lin Li
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Mohammad Ghorbani
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Monika Weisz-Hubshman
- Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Raphael Recanati Genetic Institute, Rabin Medical Center, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Justine Rousseau
- Paediatric Department, CHU Sainte-Justine Hospital, University of Montreal, Quebec, Canada
| | - Isabelle Thiffault
- Center for Pediatric Genomic Medicine & Division of Clinical Genetics, Children's Mercy Hospital, Kansas City, Missouri, USA.,Faculty of Medicine, University of Missouri-Kansas City, Kansas City, Missouri, USA
| | - Rhonda E Schnur
- Division of Genetics, Cooper University Health Care, Camden, New Jersey, USA.,GeneDx, Gaithersburg, Maryland, USA
| | - Catherine Breen
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Saint Mary's Hospital, Manchester, United Kingdom
| | - Renske Oegema
- Department of Genetics, University Medical Center Utrecht, Utrecht, Netherlands
| | - Marjan Mm Weiss
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Quinten Waisfisz
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Sara Welner
- Division of Pediatric Medical Genetics, The State University of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA
| | - Helen Kingston
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Saint Mary's Hospital, Manchester, United Kingdom
| | - Jordan A Hills
- University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Elles Mj Boon
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Lina Basel-Salmon
- Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Raphael Recanati Genetic Institute, Rabin Medical Center, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Felsenstein Medical Research Center, Rabin Medical Center, Petach Tikva, Israel
| | - Osnat Konen
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Imaging Department, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - Hadassa Goldberg-Stern
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Epilepsy Unit and EEG Laboratory, Schneider Medical Center, Petach Tikva, Israel
| | - Lily Bazak
- Raphael Recanati Genetic Institute, Rabin Medical Center, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shay Tzur
- Laboratory of Molecular Medicine, Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Haifa, Israel.,Genomic Research Department, Emedgene Technologies, Tel Aviv, Israel
| | - Jianliang Jin
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada.,Research Center for Bone and Stem Cells, Department of Human Anatomy, Key Laboratory of Aging & Disease, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiuli Bi
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Michael Bruccoleri
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | | | | | - Maria Scarano
- Division of Genetics, Cooper University Health Care, Camden, New Jersey, USA
| | | | - Susan S Brooks
- Division of Pediatric Medical Genetics, The State University of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA
| | - Susan Starling Hughes
- Center for Pediatric Genomic Medicine & Division of Clinical Genetics, Children's Mercy Hospital, Kansas City, Missouri, USA.,Faculty of Medicine, University of Missouri-Kansas City, Kansas City, Missouri, USA
| | - K L I van Gassen
- Department of Genetics, University Medical Center Utrecht, Utrecht, Netherlands
| | - Johanna M van Hagen
- Department of Clinical Genetics, Amsterdam University Medical Center, Amsterdam, Netherlands
| | - Tej K Pandita
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, Texas, USA
| | - Pankaj B Agrawal
- Divisions of Newborn Medicine and Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Philippe M Campeau
- Paediatric Department, CHU Sainte-Justine Hospital, University of Montreal, Quebec, Canada
| | - Xiang-Jiao Yang
- Rosalind and Morris Goodman Cancer Research Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada.,Departments of Biochemistry and Medicine, McGill University Health Center, Montreal, Quebec, Canada
| |
Collapse
|
27
|
Keywan C, Holm IA, Poduri A, Brownstein CA, Alexandrescu S, Chen J, Geffre C, Goldstein RD. A de novo BRPF1 variant in a case of Sudden Unexplained Death in Childhood. Eur J Med Genet 2020; 63:104002. [PMID: 32652122 DOI: 10.1016/j.ejmg.2020.104002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/02/2020] [Accepted: 07/04/2020] [Indexed: 10/23/2022]
Abstract
Sudden Unexplained Death in Childhood (SUDC), the death of a child that remains unexplained after a complete autopsy and investigation, is a rare and poorly understood entity. This case report describes a 3-year-old boy with history of language delay and ptosis, who died suddenly in his sleep without known cause. A pathogenic de novo frameshift mutation in BRPF1, a gene which has been associated with the syndrome of Intellectual Developmental Disorder with Dysmorphic Facies and Ptosis (IDDDFP), was identified during a post-mortem evaluation. The finding of a pathogenic variant in BRPF1, which has not previously been associated with sudden death, in an SUDC case has implications for this child's family and contributes to the broader field of SUDC research. This case demonstrates the utility of post-mortem genetic testing in SUDC.
Collapse
Affiliation(s)
- Christine Keywan
- Robert's Program for Sudden Unexpected Death in Pediatrics, Boston Children's Hospital, USA
| | - Ingrid A Holm
- Robert's Program for Sudden Unexpected Death in Pediatrics, Boston Children's Hospital, USA; Division of Genetics and Genomics and Manton Center for Orphan Diseases Research, Boston Children's Hospital, USA; Department of Pediatrics, Harvard Medical School, USA
| | - Annapurna Poduri
- Robert's Program for Sudden Unexpected Death in Pediatrics, Boston Children's Hospital, USA; Epilepsy Genetics Program, Department of Neurology, Boston Children's Hospital, Harvard Medical School, USA
| | - Catherine A Brownstein
- Robert's Program for Sudden Unexpected Death in Pediatrics, Boston Children's Hospital, USA; Division of Genetics and Genomics and Manton Center for Orphan Diseases Research, Boston Children's Hospital, USA; Department of Pediatrics, Harvard Medical School, USA
| | - Sanda Alexandrescu
- Robert's Program for Sudden Unexpected Death in Pediatrics, Boston Children's Hospital, USA; Department of Pathology at Boston Children's Hospital, Harvard Medical School, USA
| | - Jennifer Chen
- Pima County Office of the Medical Examiner, Tucson, AZ, USA
| | | | - Richard D Goldstein
- Robert's Program for Sudden Unexpected Death in Pediatrics, Boston Children's Hospital, USA; Department of Pediatrics, Harvard Medical School, USA; Division of General Pediatrics, Department of Pediatrics, Boston Children's Hospital, Boston, MA, USA.
| |
Collapse
|
28
|
Naseer MI, Abdulkareem AA, Guzmán-Vega FJ, Arold ST, Pushparaj PN, Chaudhary AG, AlQahtani MH. Novel Missense Variant in Heterozygous State in the BRPF1 Gene Leading to Intellectual Developmental Disorder With Dysmorphic Facies and Ptosis. Front Genet 2020; 11:368. [PMID: 32457794 PMCID: PMC7221184 DOI: 10.3389/fgene.2020.00368] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 03/25/2020] [Indexed: 12/15/2022] Open
Abstract
Intellectual developmental disorder with dysmorphic facies and ptosis is an autosomal dominant condition characterized by delayed psychomotor development, intellectual disability, delayed speech, and dysmorphic facial features, mostly ptosis. Heterozygous mutations in bromodomain and plant homeodomain (PHD) finger containing one (BRPF1) gene have been reported. In this study, whole exome sequencing (WES) was performed as a molecular diagnostic test. Bioinformatics of WES data and candidate gene prioritization identified a novel variant in heterozygous state in the exon 3 of BRPF1 gene (ENST383829: c.1054G > C and p.Val352Leu). Autosomal dominant inheritance in the family affected individuals and exclusion of non-pathogenicity in the ethnically matched healthy controls (n = 100) were performed by Sanger sequencing. To the best of our knowledge, this is the first evidence of BRPF1 variant in a Saudi family. Whole exome sequencing analysis has been proven as a valuable tool in the molecular diagnostics. Our findings further expand the role of WES in efficient disease diagnosis in Arab families and explained that the mutation in BRPF1 gene plays an important role for the development of IDDFP syndrome.
Collapse
Affiliation(s)
- Muhammad Imran Naseer
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | | | - Francisco J Guzmán-Vega
- Division of Biological and Environmental Sciences and Engineering (BESE), Computational Bioscience Research Center (CBRC), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.,Centre de Biochimie Structurale, CNRS, INSERM, Université de Montpellier, Montpellier, France
| | - Stefan T Arold
- Division of Biological and Environmental Sciences and Engineering (BESE), Computational Bioscience Research Center (CBRC), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.,Centre de Biochimie Structurale, CNRS, INSERM, Université de Montpellier, Montpellier, France
| | - Peter Natesan Pushparaj
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Adeel G Chaudhary
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.,Center for Innovation in Personalized Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammad H AlQahtani
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
29
|
Concise Review: The Regulatory Mechanism of Lysine Acetylation in Mesenchymal Stem Cell Differentiation. Stem Cells Int 2020; 2020:7618506. [PMID: 32399051 PMCID: PMC7204305 DOI: 10.1155/2020/7618506] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/02/2020] [Indexed: 12/30/2022] Open
Abstract
Nowadays, the use of MSCs has attracted considerable attention in the global science and technology field, with the self-renewal and multidirectional differentiation potential for diabetes, obesity treatment, bone repair, nerve repair, myocardial repair, and so on. Epigenetics plays an important role in the regulation of mesenchymal stem cell differentiation, which has become a research hotspot in the medical field. This review focuses on the role of lysine acetylation modification on the determination of MSC differentiation direction. During this progress, the recruitment of lysine acetyltransferases (KATs) and lysine deacetylases (KDACs) is the crux of transcriptional mechanisms in the dynamic regulation of key genes controlling MSC multidirectional differentiation.
Collapse
|
30
|
Ilyas M, Mir A, Efthymiou S, Houlden H. The genetics of intellectual disability: advancing technology and gene editing. F1000Res 2020; 9. [PMID: 31984132 PMCID: PMC6966773 DOI: 10.12688/f1000research.16315.1] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/10/2020] [Indexed: 12/22/2022] Open
Abstract
Intellectual disability (ID) is a neurodevelopmental condition affecting 1–3% of the world’s population. Genetic factors play a key role causing the congenital limitations in intellectual functioning and adaptive behavior. The heterogeneity of ID makes it more challenging for genetic and clinical diagnosis, but the advent of large-scale genome sequencing projects in a trio approach has proven very effective. However, many variants are still difficult to interpret. A combined approach of next-generation sequencing and functional, electrophysiological, and bioinformatics analysis has identified new ways to understand the causes of ID and help to interpret novel ID-causing genes. This approach offers new targets for ID therapy and increases the efficiency of ID diagnosis. The most recent functional advancements and new gene editing techniques involving the use of CRISPR–Cas9 allow for targeted editing of DNA in
in vitro and more effective mammalian and human tissue-derived disease models. The expansion of genomic analysis of ID patients in diverse and ancient populations can reveal rare novel disease-causing genes.
Collapse
Affiliation(s)
- Muhammad Ilyas
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan.,Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Asif Mir
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Stephanie Efthymiou
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Henry Houlden
- Department of Neuromuscular Disorders, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| |
Collapse
|
31
|
Abstract
Nε-lysine acetylation was discovered more than half a century ago as a post-translational modification of histones and has been extensively studied in the context of transcription regulation. In the past decade, proteomic analyses have revealed that non-histone proteins are frequently acetylated and constitute a major portion of the acetylome in mammalian cells. Indeed, non-histone protein acetylation is involved in key cellular processes relevant to physiology and disease, such as gene transcription, DNA damage repair, cell division, signal transduction, protein folding, autophagy and metabolism. Acetylation affects protein functions through diverse mechanisms, including by regulating protein stability, enzymatic activity, subcellular localization and crosstalk with other post-translational modifications and by controlling protein-protein and protein-DNA interactions. In this Review, we discuss recent progress in our understanding of the scope, functional diversity and mechanisms of non-histone protein acetylation.
Collapse
|
32
|
Yan K, Rousseau J, Machol K, Cross LA, Agre KE, Gibson CF, Goverde A, Engleman KL, Verdin H, De Baere E, Potocki L, Zhou D, Cadieux-Dion M, Bellus GA, Wagner MD, Hale RJ, Esber N, Riley AF, Solomon BD, Cho MT, McWalter K, Eyal R, Hainlen MK, Mendelsohn BA, Porter HM, Lanpher BC, Lewis AM, Savatt J, Thiffault I, Callewaert B, Campeau PM, Yang XJ. Deficient histone H3 propionylation by BRPF1-KAT6 complexes in neurodevelopmental disorders and cancer. SCIENCE ADVANCES 2020; 6:eaax0021. [PMID: 32010779 PMCID: PMC6976298 DOI: 10.1126/sciadv.aax0021] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 11/20/2019] [Indexed: 05/22/2023]
Abstract
Lysine acetyltransferase 6A (KAT6A) and its paralog KAT6B form stoichiometric complexes with bromodomain- and PHD finger-containing protein 1 (BRPF1) for acetylation of histone H3 at lysine 23 (H3K23). We report that these complexes also catalyze H3K23 propionylation in vitro and in vivo. Immunofluorescence microscopy and ATAC-See revealed the association of this modification with active chromatin. Brpf1 deletion obliterates the acylation in mouse embryos and fibroblasts. Moreover, we identify BRPF1 variants in 12 previously unidentified cases of syndromic intellectual disability and demonstrate that these cases and known BRPF1 variants impair H3K23 propionylation. Cardiac anomalies are present in a subset of the cases. H3K23 acylation is also impaired by cancer-derived somatic BRPF1 mutations. Valproate, vorinostat, propionate and butyrate promote H3K23 acylation. These results reveal the dual functionality of BRPF1-KAT6 complexes, shed light on mechanisms underlying related developmental disorders and various cancers, and suggest mutation-based therapy for medical conditions with deficient histone acylation.
Collapse
Affiliation(s)
- Kezhi Yan
- Rosalind and Morris Goodman Cancer Research Center, McGill University, Montreal, Quebec H3A 1A3, Canada
- Department of Medicine, McGill University, Montreal, Quebec H3A 1A3, Canada
| | - Justine Rousseau
- Department of Pediatrics, Sainte-Justine Hospital, University of Montreal, Quebec H3T 1C5, Canada
| | - Keren Machol
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
- Texas Children’s Hospital, 6701 Fannin Street, Houston, TX 77030, USA
| | - Laura A. Cross
- Center for Pediatric Genomic Medicine and Department of Clinical Genetics, Children’s Mercy Hospital, Kansas City, MO 64108, USA
| | - Katherine E. Agre
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA
| | - Cynthia Forster Gibson
- Trillium Health Partners, Credit Valley Hospital, Genetics Program, 2200 Eglinton Ave. W, Mississauga, Ontario L5M 2N1, Canada
| | - Anne Goverde
- Department of Clinical Genetics, Erasmus MC, University Medical Center, Rotterdam, Netherlands
| | - Kendra L. Engleman
- Center for Pediatric Genomic Medicine and Department of Clinical Genetics, Children’s Mercy Hospital, Kansas City, MO 64108, USA
| | - Hannah Verdin
- Center for Medical Genetics, Ghent University and Ghent University Hospital, C. Heymanslaan 10, B-9000 Ghent, Belgium
| | - Elfride De Baere
- Center for Medical Genetics, Ghent University and Ghent University Hospital, C. Heymanslaan 10, B-9000 Ghent, Belgium
| | - Lorraine Potocki
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
- Texas Children’s Hospital, 6701 Fannin Street, Houston, TX 77030, USA
| | - Dihong Zhou
- Center for Pediatric Genomic Medicine and Department of Clinical Genetics, Children’s Mercy Hospital, Kansas City, MO 64108, USA
| | - Maxime Cadieux-Dion
- Center for Pediatric Genomic Medicine and Department of Clinical Genetics, Children’s Mercy Hospital, Kansas City, MO 64108, USA
| | - Gary A. Bellus
- Clinical Genetics and Genomic Medicine, Geisinger, 100 N. Academy Ave., Danville, PA 17822, USA
| | - Monisa D. Wagner
- Autism and Developmental Medicine Institute, Geisinger, 120 Hamm Dr., Lewisburg, PA 17837, USA
| | - Rebecca J. Hale
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA
| | - Natacha Esber
- KAT6A Foundation, 3 Louise Dr., West Nyack, NY 10994, USA
| | - Alan F. Riley
- Texas Children’s Hospital, 6651 Main Street Legacy Tower, 21st Floor Houston, TX 77030, USA
| | | | - Megan T. Cho
- GeneDx, 207 Perry Parkway, Gaithersburg, MD 20877, USA
| | | | - Roy Eyal
- Kaiser Oakland Medical Center 3600 Broadway, Oakland, CA 94611, USA
| | - Meagan K. Hainlen
- Center for Pediatric Genomic Medicine and Department of Clinical Genetics, Children’s Mercy Hospital, Kansas City, MO 64108, USA
| | | | - Hillary M. Porter
- Department of Genetics and Metabolism, Rare Disease Institute, Children’s National Hospital, 111 Michigan Avenue NW, Washington, DC 20010, USA
| | | | - Andrea M. Lewis
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
- Texas Children’s Hospital, 6701 Fannin Street, Houston, TX 77030, USA
| | - Juliann Savatt
- Autism and Developmental Medicine Institute, Geisinger, 120 Hamm Dr., Lewisburg, PA 17837, USA
| | - Isabelle Thiffault
- Center for Pediatric Genomic Medicine and Department of Clinical Genetics, Children’s Mercy Hospital, Kansas City, MO 64108, USA
- Faculty of Medicine, University of Missouri Kansas City, Kansas City, MO 64110, USA
| | - Bert Callewaert
- Center for Medical Genetics, Ghent University and Ghent University Hospital, C. Heymanslaan 10, B-9000 Ghent, Belgium
| | - Philippe M. Campeau
- Department of Pediatrics, Sainte-Justine Hospital, University of Montreal, Quebec H3T 1C5, Canada
- Corresponding author. (P.M.C.); (X.-J.Y.)
| | - Xiang-Jiao Yang
- Rosalind and Morris Goodman Cancer Research Center, McGill University, Montreal, Quebec H3A 1A3, Canada
- Department of Medicine, McGill University, Montreal, Quebec H3A 1A3, Canada
- Department of Biochemistry, McGill University, Montreal, Quebec H3A 1A3, Canada
- McGill University Health Center, Montreal, Quebec H3A 1A3, Canada
- Corresponding author. (P.M.C.); (X.-J.Y.)
| |
Collapse
|
33
|
Klein BJ, Cox KL, Jang SM, Côté J, Poirier MG, Kutateladze TG. Molecular Basis for the PZP Domain of BRPF1 Association with Chromatin. Structure 2019; 28:105-110.e3. [PMID: 31711755 DOI: 10.1016/j.str.2019.10.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 09/27/2019] [Accepted: 10/22/2019] [Indexed: 11/25/2022]
Abstract
The assembly of human histone acetyltransferase MOZ/MORF complexes relies on the scaffolding bromodomain plant homeodomain (PHD) finger 1 (BRPF1) subunit. The PHD-zinc-knuckle-PHD module of BRPF1 (BRPF1PZP) has been shown to associate with the histone H3 tail and DNA; however, the molecular mechanism underlying recognition of H3 and the relationship between the histone and DNA-binding activities remain unclear. In this study, we report the crystal structure of BRPF1PZP bound to the H3 tail and characterize the role of the bipartite interaction in the engagement of BRPF1PZP with the nucleosome core particle (NCP). We find that although both interactions of BRPF1PZP with the H3 tail and DNA are required for tight binding to NCP and for acetyltransferase function of the BRPF1-MORF-ING5-MEAF6 complex, binding to extranucleosomal DNA dominates. Our findings suggest that functionally active BRPF1PZP might be important in stabilization of the MOZ/MORF complexes at chromatin with accessible DNA.
Collapse
Affiliation(s)
- Brianna J Klein
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA
| | - Khan L Cox
- Department of Physics, Ohio State University, Columbus, OH 43210, USA
| | - Suk Min Jang
- Laval University Cancer Research Center, CHU de Québec-UL Research Center-Oncology Division, Quebec City, QC G1R 3S3, Canada
| | - Jacques Côté
- Laval University Cancer Research Center, CHU de Québec-UL Research Center-Oncology Division, Quebec City, QC G1R 3S3, Canada
| | - Michael G Poirier
- Department of Physics, Ohio State University, Columbus, OH 43210, USA.
| | - Tatiana G Kutateladze
- Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO 80045, USA.
| |
Collapse
|
34
|
Demeulenaere S, Beysen D, De Veuster I, Reyniers E, Kooy F, Meuwissen M. Novel BRPF1 mutation in a boy with intellectual disability, coloboma, facial nerve palsy and hypoplasia of the corpus callosum. Eur J Med Genet 2019; 62:103691. [DOI: 10.1016/j.ejmg.2019.103691] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/11/2019] [Accepted: 06/05/2019] [Indexed: 10/26/2022]
|
35
|
Mohammadzadeh A, Akbaroghli S, Aghaei-Moghadam E, Mahdieh N, Badv RS, Jamali P, Kariminejad R, Chavoshzadeh Z, Ghasemi Firouzabadi S, Mansour Ghanaie R, Nozari A, Banihashemi S, Hadipour F, Hadipour Z, Kariminejad A, Najmabadi H, Shafeghati Y, Behjati F. Investigation of Chromosomal Abnormalities and Microdeletion/ Microduplication(s) in Fifty Iranian Patients with Multiple Congenital Anomalies. CELL JOURNAL 2019; 21:337-349. [PMID: 31210441 PMCID: PMC6582423 DOI: 10.22074/cellj.2019.6053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 10/21/2018] [Indexed: 11/24/2022]
Abstract
Objective Major birth defects are inborn structural or functional anomalies with long-term disability and adverse
impacts on individuals, families, health-care systems, and societies. Approximately 20% of birth defects are due
to chromosomal and genetic conditions. Inspired by the fact that neonatal deaths are caused by birth defects in
about 20 and 10% of cases in Iran and worldwide respectively, we conducted the present study to unravel the role
of chromosome abnormalities, including microdeletion/microduplication(s), in multiple congenital abnormalities
in a number of Iranian patients.
Materials and Methods In this descriptive cross-sectional study, 50 sporadic patients with Multiple Congenital
Anomalies (MCA) were selected. The techniques employed included conventional karyotyping, fluorescence in
situ hybridization (FISH), multiplex ligation-dependent probe amplification (MLPA), and array comparative genomic
hybridisation (array-CGH), according to the clinical diagnosis for each patient.
Results Chromosomal abnormalities and microdeletion/microduplication(s) were observed in eight out of fifty patients
(16%). The abnormalities proved to result from the imbalances in chromosomes 1, 3, 12, and 18 in four of the patients.
However, the other four patients were diagnosed to suffer from the known microdeletions of 22q11.21, 16p13.3, 5q35.3,
and 7q11.23.
Conclusion In the present study, we report a patient with 46,XY, der(18)[12]/46,XY, der(18), +mar[8] dn presented
with MCA associated with hypogammaglobulinemia. Given the patient’s seemingly rare and highly complex
chromosomal abnormality and the lack of any concise mechanism presented in the literature to justify the case,
we hereby propose a novel mechanism for the formation of both derivative and ring chromosome 18. In addition,
we introduce a new 12q abnormality and a novel association of an Xp22.33 duplication with 1q43q44 deletion
syndrome. The phenotype analysis of the patients with chromosome abnormality would be beneficial for further
phenotype-genotype correlation studies.
Collapse
Affiliation(s)
- Akbar Mohammadzadeh
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Susan Akbaroghli
- Pediatric Neurology Research Center, Mofid Children's Hospital, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Clinical Genetics Division, Mofid Children's Hospital, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ehsan Aghaei-Moghadam
- Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Nejat Mahdieh
- Cardiogenetic Research Laboratory, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Shervin Badv
- Children's Medical Center, Pediatrics Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Payman Jamali
- Genetic Counseling Center, Shahroud Welfare Organization, Shahroud, Iran
| | | | - Zahra Chavoshzadeh
- Department of Immunology and Allergy, Mofid Children's Hospital, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Pediatric Infections Research Center, Research Institute for Children's Health, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Roxana Mansour Ghanaie
- Pediatric Infections Research Center, Research Institute for Children's Health, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ahoura Nozari
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Sussan Banihashemi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Fatemeh Hadipour
- Sarem Fertility and Infertility Research Center (SAFIR), Sarem Women's Hospital, Tehran, Iran.,Sarem Cell Research Center (SCRC), Sarem Women's Hospital, Tehran, Iran
| | - Zahra Hadipour
- Sarem Fertility and Infertility Research Center (SAFIR), Sarem Women's Hospital, Tehran, Iran.,Sarem Cell Research Center (SCRC), Sarem Women's Hospital, Tehran, Iran
| | | | - Hossein Najmabadi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.,Kariminejad-Najmabadi Pathology and Genetics Center, Tehran, Iran
| | - Yousef Shafeghati
- Sarem Fertility and Infertility Research Center (SAFIR), Sarem Women's Hospital, Tehran, Iran.,Sarem Cell Research Center (SCRC), Sarem Women's Hospital, Tehran, Iran
| | - Farkhondeh Behjati
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.Electronic Address: .,Sarem Fertility and Infertility Research Center (SAFIR), Sarem Women's Hospital, Tehran, Iran.,Sarem Cell Research Center (SCRC), Sarem Women's Hospital, Tehran, Iran
| |
Collapse
|
36
|
Su Y, Liu J, Yu B, Ba R, Zhao C. Brpf1 Haploinsufficiency Impairs Dendritic Arborization and Spine Formation, Leading to Cognitive Deficits. Front Cell Neurosci 2019; 13:249. [PMID: 31213987 PMCID: PMC6558182 DOI: 10.3389/fncel.2019.00249] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/17/2019] [Indexed: 12/14/2022] Open
Abstract
Haploinsufficiency of the bromodomain and PHD finger-containing protein 1 (BRPF1) gene causes intellectual disability (ID), which is characterized by impaired intellectual and cognitive function; however, the neurological basis for ID and the neurological function of BRPF1 dosage in the brain remain unclear. Here, by crossing Emx1-cre mice with Brpf1fl/fl mice, we generated Brpf1 heterozygous mice to model BRPF1-related ID. Brpf1 heterozygotes showed reduced dendritic complexity in both hippocampal granule cells and cortical pyramidal neurons, accompanied by reduced spine density and altered spine and synapse morphology. An in vitro study of Brpf1 haploinsufficiency also demonstrated decreased frequency and amplitude of miniature EPSCs that may subsequently contribute to abnormal behaviors, including decreased anxiety levels and defective learning and memory. Our results demonstrate a critical role for Brpf1 dosage in neuron dendrite arborization, spine morphogenesis and behavior and provide insight into the pathogenesis of BRPF1-related ID.
Collapse
Affiliation(s)
- Yan Su
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing, China
| | - Junhua Liu
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing, China
| | - Baocong Yu
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing, China
| | - Ru Ba
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing, China
| | - Chunjie Zhao
- Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, School of Medicine, Southeast University, Nanjing, China
| |
Collapse
|
37
|
Pode-Shakked N, Barel O, Pode-Shakked B, Eliyahu A, Singer A, Nayshool O, Kol N, Raas-Rothschild A, Pras E, Shohat M. BRPF1-associated intellectual disability, ptosis, and facial dysmorphism in a multiplex family. Mol Genet Genomic Med 2019; 7:e665. [PMID: 31020800 PMCID: PMC6565580 DOI: 10.1002/mgg3.665] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/18/2019] [Accepted: 03/08/2019] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Over 500 epigenetic regulators have been identified throughout the human genome. Of these, approximately 30 chromatin modifiers have been implicated thus far in human disease. Recently, variants in BRPF1, encoding a chromatin reader, have been associated with a previously unrecognized autosomal dominant syndrome manifesting with intellectual disability (ID), hypotonia, dysmorphic facial features, ptosis, and/or blepharophimosis in 22 individuals. PATIENTS AND METHODS We report a multiply affected nonconsanguineous family of mixed Jewish descent who presented due to ID in three male siblings. Molecular analysis of the family was pursued using whole exome sequencing (WES) and subsequent Sanger sequencing. RESULTS Whole exome sequencing analysis brought to the identification of a novel heterozygous truncating mutation (c.556C>T, p.Q186*) in the BRPF1 gene in the affected siblings and their mother. The four affected individuals showed varying degrees of intellectual disability, distinct facial features including downslanted palpebral fissures, ptosis, and/or blepharophimosis. Their clinical characteristics are discussed in the context of previously reported patients with the BRPF1-related phenotype. CONCLUSION The reported family contributes to the current knowledge regarding this unique and newly recognized genetic disorder, and further implicates the role of BRPF1 in human brain development.
Collapse
Affiliation(s)
- Naomi Pode-Shakked
- Department of Pediatrics A, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Tel-Hashomer, Israel.,The Dr. Pinchas Borenstein Talpiot Medical Leadership Program, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Ortal Barel
- The Genomic Unit, Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Ben Pode-Shakked
- The Dr. Pinchas Borenstein Talpiot Medical Leadership Program, Sheba Medical Center, Tel-Hashomer, Israel.,Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Israel
| | - Aviva Eliyahu
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Israel
| | - Amihood Singer
- Community Genetics, Public Health Services, Ministry of Health, Jerusalem, Israel
| | - Omri Nayshool
- The Genomic Unit, Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Nitzan Kol
- The Genomic Unit, Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
| | - Annick Raas-Rothschild
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Israel
| | - Elon Pras
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,The Danek Gertner Institute of Human Genetics, Sheba Medical Center, Tel-Hashomer, Israel
| | - Mordechai Shohat
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.,The Genomic Unit, Sheba Cancer Research Center, Sheba Medical Center, Tel-Hashomer, Israel
| |
Collapse
|
38
|
New developmental syndromes: Understanding the family experience. J Genet Couns 2019; 28:202-212. [DOI: 10.1002/jgc4.1121] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 03/01/2019] [Accepted: 03/05/2019] [Indexed: 01/18/2023]
|
39
|
Kennedy J, Goudie D, Blair E, Chandler K, Joss S, McKay V, Green A, Armstrong R, Lees M, Kamien B, Hopper B, Tan TY, Yap P, Stark Z, Okamoto N, Miyake N, Matsumoto N, Macnamara E, Murphy JL, McCormick E, Hakonarson H, Falk MJ, Li D, Blackburn P, Klee E, Babovic-Vuksanovic D, Schelley S, Hudgins L, Kant S, Isidor B, Cogne B, Bradbury K, Williams M, Patel C, Heussler H, Duff-Farrier C, Lakeman P, Scurr I, Kini U, Elting M, Reijnders M, Schuurs-Hoeijmakers J, Wafik M, Blomhoff A, Ruivenkamp CAL, Nibbeling E, Dingemans AJM, Douine ED, Nelson SF, Hempel M, Bierhals T, Lessel D, Johannsen J, Arboleda VA, Newbury-Ecob R. KAT6A Syndrome: genotype-phenotype correlation in 76 patients with pathogenic KAT6A variants. Genet Med 2019; 21:850-860. [PMID: 30245513 PMCID: PMC6634310 DOI: 10.1038/s41436-018-0259-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 07/26/2018] [Indexed: 01/27/2023] Open
Abstract
PURPOSE Pathogenic variants in KAT6A have recently been identified as a cause of syndromic developmental delay. Within 2 years, the number of patients identified with pathogenic KAT6A variants has rapidly expanded and the full extent and variability of the clinical phenotype has not been reported. METHODS We obtained data for patients with KAT6A pathogenic variants through three sources: treating clinicians, an online family survey distributed through social media, and a literature review. RESULTS We identified 52 unreported cases, bringing the total number of published cases to 76. Our results expand the genotypic spectrum of pathogenic variants to include missense and splicing mutations. We functionally validated a pathogenic splice-site variant and identified a likely hotspot location for de novo missense variants. The majority of clinical features in KAT6A syndrome have highly variable penetrance. For core features such as intellectual disability, speech delay, microcephaly, cardiac anomalies, and gastrointestinal complications, genotype- phenotype correlations show that late-truncating pathogenic variants (exons 16-17) are significantly more prevalent. We highlight novel associations, including an increased risk of gastrointestinal obstruction. CONCLUSION Our data expand the genotypic and phenotypic spectrum for individuals with genetic pathogenic variants in KAT6A and we outline appropriate clinical management.
Collapse
Affiliation(s)
- Joanna Kennedy
- Clinical Genetics, University Hospitals Bristol, Southwell St, Bristol, UK
- University of Bristol, Bristol, UK
| | - David Goudie
- Clinical Genetics, Ninewells Hospital & Medical School, Dundee, UK
| | - Edward Blair
- Oxford Centre for Genomic Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Department of Clinical Genetics, Churchill Hospital, Headington, Oxford, UK
| | - Kate Chandler
- Manchester Centre for Genomic Medicine, St. Mary's Hospital, Central Manchester Foundation NHS Trust, Manchester Academic Health Science Centre (MAHSC), Manchester, UK
| | - Shelagh Joss
- West of Scotland Genetics Service, Queen Elizabeth University Hospital, Glasgow, UK
| | - Victoria McKay
- Cheshire & Merseyside Regional Genetics Service, Liverpool Women's NHS Foundation Trust, Crown Street, Liverpool, UK
| | - Andrew Green
- Department of Clinical Genetics, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
| | - Ruth Armstrong
- East Anglian Medical Genetics Service, Addenbrooke's Hospital, Cambridge, UK
| | - Melissa Lees
- Clinical Genetics, Great Ormond Street Hospital NHS Trust, London, UK
| | | | | | - Tiong Yang Tan
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Patrick Yap
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Australia
- Genetic Health Service New Zealand, Auckland, New Zealand
| | - Zornitza Stark
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Australia
| | - Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Medical Center, Osaka, Japan
- Research Institute for Maternal and Child Health, Osaka Medical Center, Osaka, Japan
| | - Noriko Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Ellen Macnamara
- National Human Genome Research Institute, NIH, Bethesda, MD, USA
| | | | - Elizabeth McCormick
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Hakon Hakonarson
- Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Marni J Falk
- Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Dong Li
- Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | | | - Eric Klee
- Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN, USA
| | - Dusica Babovic-Vuksanovic
- Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
- Department of Clinical Genomics, Mayo Clinic, Rochester, MN, USA
| | - Susan Schelley
- Division of Medical Genetics, Department of Pediatrics, Stanford University, Stanford, CA, USA
| | - Louanne Hudgins
- Division of Medical Genetics, Department of Pediatrics, Stanford University, Stanford, CA, USA
| | - Sarina Kant
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Benjamin Cogne
- Service de Génétique Médicale, CHU Nantes, Nantes, France
| | - Kimberley Bradbury
- Clinical Genetics Guys and St Thomas' NHS Foundation Trust, Guys Hospital, London, UK
| | - Mark Williams
- Molecular Diagnostics, Mater Group, South Brisbane, Queensland, Australia
| | - Chirag Patel
- Genetic Health Queensland, Herston, Brisbane, Queensland, Australia
| | - Helen Heussler
- Child Development Service, Lady Cilento Children's Hospital, Brisbane, Queensland, Australia
| | | | - Phillis Lakeman
- Academic Medical Center, Department of Clinical Genetics, Amsterdam, The Netherlands
| | - Ingrid Scurr
- Clinical Genetics, University Hospitals Bristol, Southwell St, Bristol, UK
| | - Usha Kini
- Oxford Centre for Genomic Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Department of Clinical Genetics, Churchill Hospital, Headington, Oxford, UK
| | - Mariet Elting
- Klinisch Geneticus, VU Medisch centrum, Amsterdam, The Netherlands
| | - Margot Reijnders
- Radboud University Medical Center, Department of Human Genetics, Nijmegen, The Netherlands
| | | | - Mohamed Wafik
- Oxford Centre for Genomic Medicine, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Department of Clinical Genetics, Churchill Hospital, Headington, Oxford, UK
| | - Anne Blomhoff
- Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | | | - Esther Nibbeling
- Department of Genetics, University of Groningen, Groningen, The Netherlands
| | | | - Emilie D Douine
- Department of Human Genetics, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - Stanley F Nelson
- Department of Human Genetics, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - Maja Hempel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Tatjana Bierhals
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Davor Lessel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Jessika Johannsen
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Valerie A Arboleda
- Department of Human Genetics, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA.
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA.
| | - Ruth Newbury-Ecob
- Clinical Genetics, University Hospitals Bristol, Southwell St, Bristol, UK.
- University of Bristol, Bristol, UK.
| |
Collapse
|
40
|
Lonardo F, Lonardo MS, Acquaviva F, Della Monica M, Scarano F, Scarano G. Say-Barber-Biesecker-Young-Simpson syndrome and Genitopatellar syndrome: Lumping or splitting? Clin Genet 2019; 95:253-261. [PMID: 28857140 DOI: 10.1111/cge.13127] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/01/2017] [Accepted: 08/20/2017] [Indexed: 12/20/2022]
Abstract
The Say-Barber-Biesecker-Young-Simpson variant of Ohdo syndrome (SBBYSS) and Genitopatellar syndrome (GTPTS) are 2 rare but clinically well-described diseases caused by de novo heterozygous sequence variants in the KAT6B gene. Both phenotypes are characterized by significant global developmental delay/intellectual disability, hypotonia, genital abnormalities, and patellar hypoplasia/agenesis. In addition, congenital heart defects, dental abnormalities, hearing loss, and thyroid anomalies are common to both phenotypes. This broad clinical overlap led some authors to propose the concept of KAT6B spectrum disorders. On the other hand, some clinical features could help to differentiate the 2 disorders. Furthermore, it is possible to establish a genotype-phenotype correlation when considering the position of the sequence variant along the gene, supporting the notion of the 2 disorders as really distinct entities.
Collapse
Affiliation(s)
- F Lonardo
- Medical Genetics Unit, A.O.R.N. "G. Rummo", Benevento, Italy
| | - M S Lonardo
- Medical Genetics Unit, A.O.R.N. "G. Rummo", Benevento, Italy
| | - F Acquaviva
- Medical Genetics Unit, A.O.R.N. "G. Rummo", Benevento, Italy
- Department of Translational Medical Science - Section of Pediatrics, Azienda Ospedaliera Universitaria Federico II, Naples, Italy
| | - M Della Monica
- Medical Genetics Unit, Meyer Children's Hospital, Florence, Italy
| | - F Scarano
- Medical Genetics Unit, A.O.R.N. "G. Rummo", Benevento, Italy
| | - G Scarano
- Medical Genetics Unit, A.O.R.N. "G. Rummo", Benevento, Italy
| |
Collapse
|
41
|
Bashir RA, Dixit A, Goedhart C, Parboosingh JS, Innes AM, Ferreira P, Hasan SU, Au PYB. Lin-Gettig syndrome: Craniosynostosis expands the spectrum of the KAT6B related disorders. Am J Med Genet A 2017; 173:2596-2604. [PMID: 28696035 DOI: 10.1002/ajmg.a.38355] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 06/11/2017] [Accepted: 06/14/2017] [Indexed: 02/04/2023]
Abstract
We report two patients with sagittal craniosynostosis, hypoplastic male genitalia, agenesis of the corpus callosum, thyroid abnormalities, and dysmorphic features which include short palpebral fissures and retrognathia. The clinical presentation of both patients was initially thought to be suggestive of Lin-Gettig syndrome (LGS), a multiple malformation syndrome associated with craniosynostosis that was initially reported in two brothers in 1990, with a third patient reported in 2003. Our first patient was subsequently found through exome sequencing to have a de novo mutation in KAT6B, c.4572dupT, p.(Thr1525Tyrfs*16). The second patient was ascertained as possible LGS, but KAT6B mutation testing was pursued clinically after the identification of the KAT6B mutation in Patient 1, and identified a de novo mutation, c.4205_4206delCT, p.(Ser1402Cysfs*5). The phenotypic spectrum of KAT6B mutations has been expanding since identification of KAT6B mutations in genitopatellar syndrome (GPS) and Say Barber Biesecker Young Simpson (SBBYS) syndrome patients. We show that craniosynostosis, which has not been previously reported in association with KAT6B mutations, may be part of the genitopatellar/Say Barber Biesecker Young Simpson spectrum. These two patients also further demonstrate the overlapping phenotypes of genitopatellar and SBBYS syndromes recently observed by others. Furthermore, we propose that it is possible that one or more of the previous cases of LGS may have also been due to mutation in KAT6B, and that LGS may actually be a variant within the KAT6B spectrum and not a distinct clinical entity.
Collapse
Affiliation(s)
- Rani A Bashir
- Department of Pediatrics, Section of Neonatal-Perinatal Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Abhijit Dixit
- Clinical Genetics, City Campus, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Caitlin Goedhart
- Department of Medical Genetics, University of Calgary, Calgary, Alberta, Canada
| | - Jillian S Parboosingh
- Department of Medical Genetics, University of Calgary, Calgary, Alberta, Canada.,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Allan M Innes
- Department of Medical Genetics, University of Calgary, Calgary, Alberta, Canada.,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | | | - Patrick Ferreira
- Department of Medical Genetics, University of Calgary, Calgary, Alberta, Canada
| | - Shabih U Hasan
- Department of Pediatrics, Section of Neonatal-Perinatal Medicine, University of Calgary, Calgary, Alberta, Canada.,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Ping-Yee B Au
- Department of Medical Genetics, University of Calgary, Calgary, Alberta, Canada.,Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| |
Collapse
|