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Lee CL, Chuang CK, Chen MR, Lin JL, Chiu HC, Chang YH, Tu YR, Lo YT, Lin HY, Lin SP. Genetic and Phenotypic Spectrum of KMT2D Variants in Taiwanese Case Series of Kabuki Syndrome. Diagnostics (Basel) 2024; 14:1815. [PMID: 39202303 PMCID: PMC11353766 DOI: 10.3390/diagnostics14161815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2024] [Revised: 08/17/2024] [Accepted: 08/18/2024] [Indexed: 09/03/2024] Open
Abstract
Kabuki syndrome (KS) is a rare genetic disorder characterized by distinct facial features, intellectual disability, and multiple congenital anomalies. We conducted a comprehensive analysis of the genetic and phenotypic spectrum of KS in a Taiwanese patient group of 23 patients. KMT2D variants were found in 22 individuals, with missense (26.1%), nonsense (21.7%), and frameshift (17.4%) variants being the most prevalent. One patient had a KMT2D variant of uncertain significance. The most common clinical characteristics included distinct facial features (100%), intellectual disability (100%), developmental delay (95.7%), speech delay (78.3%), hypotonia (69.6%), congenital heart abnormalities (69.6%), and recurrent infections (65.2%). Other abnormalities included hearing loss (39.1%), seizures (26.1%), cleft palate (26.1%), and renal anomalies (21.7%). This study broadens the mutational and phenotypic spectrum of KS in the Taiwanese population, highlighting the importance of comprehensive genetic testing and multidisciplinary clinical evaluations for diagnosis and treatment.
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Grants
- MMH-MM-113-13, MMH-E-113-13, MMH-MM-112-14, MMH-E-112-13, and MMH-E-111-13 Mackay Memorial Hospital
- NSTC-112-2314-B-195-014-MY3, NSTC-112-2811-B-195-001, NSTC-112-2314-B-195-003, NSTC-111-2314-B-195-017, NSTC-111-2811-B-195-002, NSTC-111-2811-B-195-001, NSTC-110-2314-B-195-014, NSTC-110-2314-B-195-010-MY3, and NSTC-110-2314-B-195-029 Ministry of Science and Technology
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Affiliation(s)
- Chung-Lin Lee
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Institute of Clinical Medicine, National Yang-Ming Chiao-Tung University, Taipei 112304, Taiwan
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
- Department of Nursing, Mackay Junior College of Medicine, Nursing and Management, Taipei 112021, Taiwan
| | - Chih-Kuang Chuang
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
- College of Medicine, Fu-Jen Catholic University, New Taipei City 24205, Taiwan
| | - Ming-Ren Chen
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
| | - Ju-Li Lin
- Division of Endocrine & Medical Genetics, Department of Pediatrics, Chang Gung Children’s Medical Center, Chang Gung Memorial Hospital, Taoyuan 33378, Taiwan;
| | - Huei-Ching Chiu
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
| | - Ya-Hui Chang
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
| | - Yuan-Rong Tu
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
| | - Yun-Ting Lo
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
| | - Hsiang-Yu Lin
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
- Department of Nursing, Mackay Junior College of Medicine, Nursing and Management, Taipei 112021, Taiwan
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
| | - Shuan-Pei Lin
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
- Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan
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Fellmann F, Saunders C, O'Donohue MF, Reid DW, McFadden KA, Montel-Lehry N, Yu C, Fang M, Zhang J, Royer-Bertrand B, Farinelli P, Karboul N, Willer JR, Fievet L, Bhuiyan ZA, Kleinhenz AL, Jadeau J, Fulbright J, Rivolta C, Renella R, Katsanis N, Beckmann JS, Nicchitta CV, Da Costa L, Davis EE, Gleizes PE. An atypical form of 60S ribosomal subunit in Diamond-Blackfan anemia linked to RPL17 variants. JCI Insight 2024; 9:e172475. [PMID: 39088281 PMCID: PMC11385091 DOI: 10.1172/jci.insight.172475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 07/25/2024] [Indexed: 08/03/2024] Open
Abstract
Diamond-Blackfan anemia syndrome (DBA) is a ribosomopathy associated with loss-of-function variants in more than 20 ribosomal protein (RP) genes. Here, we report the genetic, functional, and biochemical dissection of 2 multigenerational pedigrees with variants in RPL17, a large ribosomal subunit protein-encoding gene. Affected individuals had clinical features and erythroid proliferation defects consistent with DBA. Further, RPL17/uL22 depletion resulted in anemia and micrognathia in zebrafish larvae, and in vivo complementation studies indicated that RPL17 variants were pathogenic. Lymphoblastoid cell lines (LCLs) derived from patients displayed a ribosomal RNA maturation defect reflecting haploinsufficiency of RPL17. The proteins encoded by RPL17 variants were not incorporated into ribosomes, but 10%-20% of 60S ribosomal subunits contained a short form of 5.8S rRNA (5.8SC), a species that is marginal in normal cells. These atypical 60S subunits were actively engaged in translation. Ribosome profiling showed changes of the translational profile, but those are similar to LCLs bearing RPS19 variants. These results link an additional RP gene to DBA. They show that ribosomes can be modified substantially by RPL17 haploinsufficiency but support the paradigm that translation alterations in DBA are primarily related to insufficient ribosome production rather than to changes in ribosome structure or composition.
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Affiliation(s)
- Florence Fellmann
- The ColLaboratory, University of Lausanne, Lausanne, Switzerland
- Service of Medical Genetics, University Hospital Lausanne (CHUV), Lausanne, Switzerland
| | - Carol Saunders
- University of Missouri Kansas City, School of Medicine, Kansas City, Missouri, USA
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, Missouri, USA
| | | | - David W Reid
- Department of Biochemistry, Duke University Medical Center, Durham, North Carolina, USA
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA
| | - Kelsey A McFadden
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA
| | - Nathalie Montel-Lehry
- MCD, Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Cong Yu
- BGI-Shenzhen, Shenzhen, China
| | | | | | | | - Pietro Farinelli
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
| | | | - Jason R Willer
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA
| | - Lorraine Fievet
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA
| | - Zahurul Alam Bhuiyan
- Service of Medical Genetics, University Hospital Lausanne (CHUV), Lausanne, Switzerland
| | - Alissa Lw Kleinhenz
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA
| | - Julie Jadeau
- MCD, Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Joy Fulbright
- Division of Hematology/Oncology, Children's Mercy Hospital and Clinics, Kansas City, Missouri, USA
| | - Carlo Rivolta
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
| | - Raffaele Renella
- Division of Pediatrics, University Hospital Lausanne (CHUV), Lausanne, Switzerland
| | - Nicholas Katsanis
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA
| | - Jacques S Beckmann
- Service of Medical Genetics, University Hospital Lausanne (CHUV), Lausanne, Switzerland
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
- Clinical Bioinformatics, SIB Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Christopher V Nicchitta
- Department of Biochemistry, Duke University Medical Center, Durham, North Carolina, USA
- Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, USA
| | - Lydie Da Costa
- AP-HP, Service d'Hématologie Biologique, Hôpital Robert Debré, Paris, France
- Université Paris Cité, Paris, France
- Hematim EA4666, CURS, CHU Amiens, Amiens, France
- LABEX GR-EX, Paris, France
| | - Erica E Davis
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA
- Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
- Departments of Pediatrics and Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
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El-Araby RE, Wasif K, Johnson R, Tu Q, Aboushousha T, Zhu ZX, Chen J. Establishment of a novel cellular model for Alzheimer's disease in vitro studies. Exp Neurol 2024; 378:114820. [PMID: 38789025 DOI: 10.1016/j.expneurol.2024.114820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 05/07/2024] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease characterized by memory loss, cognitive impairment, and behavioral and psychological symptoms of dementia. The limited efficacy of drugs for the treatment of neurodegenerative diseases reflects their complex etiology and pathogenesis. A novel in vitro model may help to bridge the gap between existing preclinical animal models and human clinical trials, thus identifying promising therapeutic targets that can be explored in upcoming clinical trials. By assisting in the identification of the mechanism of action and potential dangers, in vitro testing can also shorten the time and expense of translation. AIM As a result of these factors, our objective is to develop a powerful and informative cellular model of AD within a short period of time. Through triggering the MAPK and NF-κβ signaling pathways with the aid of small chemical compounds (PAF C-16 and BetA), respectively, in mouse microglial (SIM-A9) and neuroblast Neuro-2a (N2a) cell lines. RESULTS PAF C-16, initiated an activation effect at a concentration of 3.12 nM to 25 nM in the SIM-A9 and N2a cell lines after 72 h. BetA, activated the NF-κβ pathway with a concentration of 12.5 nM to 25 nM in the SIM-A9 and N2a cell lines after 72 h. The combination of the activator chemicals provided suitable activation for MEK1/2-ERK and NF-κβ in more than three subcultures. Activators significantly initiate APP and MAPT gene expression, as well as the expression of proteins APP, β. Amyloid, tau, and p-tau. The activation of the targeted pathways leads to significant morphological changes. CONCLUSION We can infer that the MEK1/2-ERK and NF-κβ pathways, respectively, are directly activated by the PAF C-16 and BetA chemicals. The activation of MEK1/2-ERK pathway results in the activation of the APP gene, which in turn activates the β. Amyloid protein, which in turn results in plaque. Furthermore, NF-κβ activation results in the activation of the MAPT gene, which leads to Tau and p-Tau protein activation, which ultimately results in tangles. This can be put into practice in just three days, with a high level of activity and stability that is passed down to the next three generations (subculture), with significant morphological changes. In microglial and neuroblast cell lines, we were successful in creating a novel AD-cell model.
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Affiliation(s)
- Rady E El-Araby
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA 02111, USA; Theodor Bilharz Research Institute, Ministry of scientific Research, Cairo, Egypt
| | - Komal Wasif
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA 02111, USA; Department of Human Physiology, Sargent College of Health and Rehabilitation Sciences, Boston University, Boston, MA 02215, USA
| | - Rebecca Johnson
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA 02111, USA; Department of Human Physiology, Sargent College of Health and Rehabilitation Sciences, Boston University, Boston, MA 02215, USA
| | - Qisheng Tu
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA 02111, USA
| | - Tarek Aboushousha
- Theodor Bilharz Research Institute, Ministry of scientific Research, Cairo, Egypt
| | - Zoe Xiaofang Zhu
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA 02111, USA
| | - Jake Chen
- Division of Oral Biology, Tufts University School of Dental Medicine, Boston, MA 02111, USA; Department of Genetics, Molecular and Cell Biology, Tufts University School of Medicine, and Graduate School of Biomedical Sciences. 136 Harrison Ave, M&V 830, Boston, MA 02111, USA.
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Potter SJ, Zhang L, Kotliar M, Wu Y, Schafer C, Stefan K, Boukas L, Qu’d D, Bodamer O, Simpson BN, Barski A, Lindsley AW, Bjornsson HT. KMT2D regulates activation, localization, and integrin expression by T-cells. Front Immunol 2024; 15:1341745. [PMID: 38765012 PMCID: PMC11099208 DOI: 10.3389/fimmu.2024.1341745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 03/26/2024] [Indexed: 05/21/2024] Open
Abstract
Individuals with Kabuki syndrome present with immunodeficiency; however, how pathogenic variants in the gene encoding the histone-modifying enzyme lysine methyltransferase 2D (KMT2D) lead to immune alterations remain poorly understood. Following up on our prior report of KMT2D-altered integrin expression in B-cells, we performed targeted analyses of KMT2D's influence on integrin expression in T-cells throughout development (thymocytes through peripheral T-cells) in murine cells with constitutive- and conditional-targeted Kmt2d deletion. Using high-throughput RNA-sequencing and flow cytometry, we reveal decreased expression (both at the transcriptional and translational levels) of a cluster of leukocyte-specific integrins, which perturb aspects of T-cell activation, maturation, adhesion/localization, and effector function. H3K4me3 ChIP-PCR suggests that these evolutionary similar integrins are under direct control of KMT2D. KMT2D loss also alters multiple downstream programming/signaling pathways, including integrin-based localization, which can influence T-cell populations. We further demonstrated that KMT2D deficiency is associated with the accumulation of murine CD8+ single-positive (SP) thymocytes and shifts in both human and murine peripheral T-cell populations, including the reduction of the CD4+ recent thymic emigrant (RTE) population. Together, these data show that the targeted loss of Kmt2d in the T-cell lineage recapitulates several distinct features of Kabuki syndrome-associated immune deficiency and implicates epigenetic mechanisms in the regulation of integrin signaling.
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Affiliation(s)
- Sarah J. Potter
- Division of Allergy & Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Li Zhang
- McKusick-Nathans Department of Genetics, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Michael Kotliar
- Division of Allergy & Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Yuehong Wu
- Division of Allergy & Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Caitlin Schafer
- Division of Allergy & Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Kurtis Stefan
- Division of Allergy & Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Leandros Boukas
- McKusick-Nathans Department of Genetics, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Dima Qu’d
- Division of Human Genetics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Olaf Bodamer
- Division of Genetics and Genomics, Boston Children’s Hospital, Boston, MA, United States
- The Roya Kabuki Program, Boston Children’s Hospital, Boston, MA, United States
- Division of Genetics and Genomics, Broad Institute of MIT and Harvard University, Cambridge, MA, United States
| | - Brittany N. Simpson
- Division of Human Genetics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Artem Barski
- Division of Allergy & Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Division of Human Genetics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Andrew W. Lindsley
- Division of Allergy & Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Hans T. Bjornsson
- McKusick-Nathans Department of Genetics, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Faculty of Medicine, The University of Iceland, Reykjavik, Iceland
- Department of Genetics and Molecular Medicine, Landspitali University Hospital, Reykjavik, Iceland
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Tang Y, Yuan Z, Lu X, Song Y, Zhu S, Qiu C, zhang Q, Fu B, Jia C, Li H. RAMP1 Protects Hepatocytes against Ischemia-reperfusion Injury by Inhibiting the ERK/YAP Pathway. J Clin Transl Hepatol 2024; 12:357-370. [PMID: 38638379 PMCID: PMC11022058 DOI: 10.14218/jcth.2023.00339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 01/03/2024] [Accepted: 02/02/2024] [Indexed: 04/20/2024] Open
Abstract
Background and Aims Hepatic ischemia-reperfusion injury (HIRI) is a prevalent complication of liver transplantation, partial hepatectomy, and severe infection, necessitating the development of more effective clinical strategies. Receptor activity-modifying protein 1 (RAMP1), a member of the G protein-coupled receptor adapter family, has been implicated in numerous physiological and pathological processes. The study aimed to investigate the pathogenesis of RAMP1 in HIRI. Methods We established a 70% liver ischemia-reperfusion model in RAMP1 knockout (KO) and wild-type mice. Liver and blood samples were collected after 0, 6, and 24 h of hypoxia/reperfusion. Liver histological and serological analyses were performed to evaluate liver damage. We also conducted in-vitro and in-vivo experiments to explore the molecular mechanism underlying RAMP1 function. Results Liver injury was exacerbated in RAMP1-KO mice compared with the sham group, as evidenced by increased cell death and elevated serum transaminase and inflammation levels. HIRI was promoted in RAMP1-KO mice via the induction of hepatocyte apoptosis and inhibition of proliferation. The absence of RAMP1 led to increased activation of the extracellular signal-regulated kinase (ERK)/mitogen-activated protein kinase (MAPK) pathway and yes-associated protein (YAP) phosphorylation, ultimately promoting apoptosis. SCH772984, an ERK/MAPK phosphorylation inhibitor, and PY-60, a YAP phosphorylation inhibitor, reduced apoptosis in in-vitro and in-vivo experiments. Conclusions Our findings suggest that RAMP1 protects against HIRI by inhibiting ERK and YAP phosphorylation signal transduction, highlighting its potential as a therapeutic target for HIRI and providing a new avenue for intervention.
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Affiliation(s)
- Yongsheng Tang
- Department of Hepatic Surgery, Liver Transplantation Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Zenan Yuan
- Department of Hepatic Surgery, Liver Transplantation Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Xu Lu
- Department of Hepatic Surgery, Liver Transplantation Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Yingqiu Song
- Department of Gastrointestinal Surgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Shuguang Zhu
- Department of Hepatic Surgery, Liver Transplantation Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Chunhui Qiu
- Department of Hepatic Surgery, Liver Transplantation Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Qi zhang
- Department of Cell-Gene Therapy Translational Medicine Research Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Binsheng Fu
- Department of Hepatic Surgery, Liver Transplantation Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Changchang Jia
- Department of Cell-Gene Therapy Translational Medicine Research Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Hua Li
- Department of Hepatic Surgery, Liver Transplantation Center, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
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Rossini L, Ricci S, Montin D, Azzari C, Gambineri E, Tellini M, Conti F, Pession A, Saettini F, Naviglio S, Valencic E, Magnolato A, Baselli L, Azzolini S, Consolini R, Leonardi L, D'Alba I, Carraro E, Romano R, Melis D, Stagi S, Cirillo E, Giardino G, Biffi A, Pignata C, Putti MC, Marzollo A. Immunological Aspects of Kabuki Syndrome: A Retrospective Multicenter Study of the Italian Primary Immunodeficiency Network (IPINet). J Clin Immunol 2024; 44:105. [PMID: 38676773 DOI: 10.1007/s10875-024-01676-y] [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: 12/12/2023] [Accepted: 02/23/2024] [Indexed: 04/29/2024]
Abstract
Kabuki Syndrome (KS) is a multisystemic genetic disorder. A portion of patients has immunological manifestations characterized by increased susceptibility to infections and autoimmunity. Aiming to describe the clinical and laboratory immunological aspects of KS, we conducted a retrospective multicenter observational study on patients with KS treated in centers affiliated to the Italian Primary Immunodeficiency Network.Thirty-nine patients were enrolled, with a median age at evaluation of 10 years (range: 3 m-21y). All individuals had organ malformations of variable severity. Congenital heart defect (CHD) was present in 19/39 patients (49%) and required surgical correction in 9/39 (23%), with associated thymectomy in 7/39 (18%). Autoimmune cytopenia occurred in 6/39 patients (15%) and was significantly correlated with thymectomy (p < 0.002), but not CHD. Individuals with cytopenia treated with mycophenolate as long-term immunomodulatory treatment (n = 4) showed complete response. Increased susceptibility to infections was observed in 22/32 patients (69%). IgG, IgA, and IgM were low in 13/29 (45%), 13/30 (43%) and 4/29 (14%) patients, respectively. Immunoglobulin substitution was required in three patients. Lymphocyte subsets were normal in all patients except for reduced naïve T-cells in 3/15 patients (20%) and reduced memory switched B-cells in 3/17 patients (18%). Elevated CD3 + TCRαβ + CD4-CD8-T-cells were present in 5/17 individuals (23%) and were correlated with hematological and overall autoimmunity (p < 0.05).In conclusion, immunological manifestations of KS in our cohort include susceptibility to infections, antibody deficiency, and autoimmunity. Autoimmune cytopenia is correlated with thymectomy and elevated CD3 + TCRαβ + CD4-CD8-T-cells, and benefits from treatment with mycophenolate.
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Affiliation(s)
- Linda Rossini
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, Padua, 35128, Italy
- Maternal and Child Health Department, Padua University, Via Giustiniani, 3, Padua, 35128, Italy
| | - Silvia Ricci
- Immunology, Pediatric Unit, IRCCS Meyer Children's Hospital, viale G.Pieraccini 24, Florence, 50139, Italy
- Department of Health Sciences, University of Florence, Florence, Italy
| | - Davide Montin
- Immunology and Rheumatology Unit, Regina Margherita Children Hospital, Turin, Italy
| | - Chiara Azzari
- Immunology, Pediatric Unit, IRCCS Meyer Children's Hospital, viale G.Pieraccini 24, Florence, 50139, Italy
- Department of Health Sciences, University of Florence, Florence, Italy
| | - Eleonora Gambineri
- Centre of Excellence, Department of Pediatric Hematology-Oncology, IRCCS Meyer Children's Hospital, Florence, Italy
- Department of "NEUROFARBA", Section of Child's Health, University of Florence, Florence, Italy
| | - Marco Tellini
- Centre of Excellence, Department of Pediatric Hematology-Oncology, IRCCS Meyer Children's Hospital, Florence, Italy
| | - Francesca Conti
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, 40138, Italy
- Dept. of Medical and Surgical Sciences, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Andrea Pession
- Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, 40138, Italy
- Dept. of Medical and Surgical Sciences, Alma Mater Studiorum, University of Bologna, Bologna, Italy
| | - Francesco Saettini
- Tettamanti Research Center, University of Milano-Bicocca, University of Milano Bicocca, Monza, Italy
| | - Samuele Naviglio
- Institute for Maternal and Child Health IRCCS "Burlo Garofolo", Trieste, Italy
| | - Erica Valencic
- Institute for Maternal and Child Health IRCCS "Burlo Garofolo", Trieste, Italy
| | - Andrea Magnolato
- Institute for Maternal and Child Health IRCCS "Burlo Garofolo", Trieste, Italy
| | - Lucia Baselli
- Department of Pediatrics, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | | | - Rita Consolini
- Section of Clinical and Laboratory Immunology, Division of Pediatrics, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Lucia Leonardi
- Maternal, Infantile and Urological Sciences Department, Sapienza University of Rome, Rome, Italy
| | - Irene D'Alba
- Paediatric Haematology-Oncology, Maternal Infant Hospital "G. Salesi", Ancona, Italy
| | - Elisa Carraro
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, Padua, 35128, Italy
| | - Roberta Romano
- Department of Translational Medical Sciences, Section of Pediatrics, Federico II University, Naples, Italy
| | - Daniela Melis
- Department of Medicine, Surgery and Dentistry, University of Salerno, Via Salvador Allende Baronissi, Campania, 84081, Italy
| | - Stefano Stagi
- Department of Health Sciences, University of Florence, Florence, Italy
- Auxoendocrinology Division, Meyer Children's Hospital, IRCCS, viale G.Pieraccini 24, Florence, 50139, Italy
| | - Emilia Cirillo
- Department of Translational Medical Sciences, Section of Pediatrics, Federico II University, Naples, Italy
| | - Giuliana Giardino
- Department of Translational Medical Sciences, Section of Pediatrics, Federico II University, Naples, Italy
| | - Alessandra Biffi
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, Padua, 35128, Italy
- Maternal and Child Health Department, Padua University, Via Giustiniani, 3, Padua, 35128, Italy
| | - Claudio Pignata
- Department of Translational Medical Sciences, Section of Pediatrics, Federico II University, Naples, Italy
| | - Maria Caterina Putti
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, Padua, 35128, Italy
| | - Antonio Marzollo
- Pediatric Hematology, Oncology and Stem Cell Transplant Division, Padua University Hospital, Via Giustiniani 3, Padua, 35128, Italy.
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7
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Lee CL, Chuang CK, Chen MR, Lin JL, Chiu HC, Chang YH, Tu YR, Lo YT, Lin HY, Lin SP. Illuminating the Genetic Basis of Congenital Heart Disease in Patients with Kabuki Syndrome. Diagnostics (Basel) 2024; 14:846. [PMID: 38667491 PMCID: PMC11049448 DOI: 10.3390/diagnostics14080846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/13/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Congenital heart defects (CHDs) affect a substantial proportion of patients with Kabuki syndrome. However, the prevalence and type of CHD and the genotype-phenotype correlations in Asian populations are not fully elucidated. This study performed a retrospective analysis of 23 Taiwanese patients with molecularly confirmed Kabuki syndrome. Twenty-two patients presented with pathogenic variants in the KMT2D gene. Comprehensive clinical assessments were performed. A literature review was conducted to summarize the spectrum of CHDs in patients with Kabuki syndrome. In total, 16 (73.9%) of 22 patients with pathogenic KMT2D variants had CHDs. The most common types of CHD were atrial septal defects (37.5%), ventricular septal defects (18.8%), coarctation of the aorta (18.8%), bicuspid aortic valve (12.5%), persistent left superior vena cava (12.5%), mitral valve prolapse (12.5%), mitral regurgitation (12.5%), and patent ductus arteriosus (12.5%). Other cardiac abnormalities were less common. Further, there were no clear genotype-phenotype correlations found. A literature review revealed similar patterns of CHDs, with a predominance of left-sided obstructive lesions and septal defects. In conclusion, the most common types of CHDs in Taiwanese patients with Kabuki syndrome who presented with KMT2D mutations are left-sided obstructive lesions and septal defects.
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Grants
- MMH-E-113-13, MMH-MM-112-14, MMH-E-112-13, and MMH-E-111-13 Mackay Memorial Hospital
- NSTC-112-2314-B-195-014-MY3, NSTC-112-2811-B-195-001, NSTC-112-2314-B-195-003, NSTC-111-2314-B-195-017, NSTC-111-2811-B-195-002, NSTC-111-2811-B-195-001, NSTC-110-2314-B-195-014, NSTC-110-2314-B-195-010-MY3, and NSTC-110-2314-B-195-029 Ministry of Science and Technology, Executive Yuan, Taiwan
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Affiliation(s)
- Chung-Lin Lee
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Institute of Clinical Medicine, National Yang-Ming Chiao-Tung University, Taipei 112304, Taiwan
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
- Department of Nursing, Mackay Junior College of Medicine, Nursing and Management, Taipei 112021, Taiwan
| | - Chih-Kuang Chuang
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
- College of Medicine, Fu-Jen Catholic University, Taipei 24205, Taiwan
| | - Ming-Ren Chen
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
| | - Ju-Li Lin
- Division of Endocrine & Medical Genetics, Department of Pediatrics, Chang Gung Children’s Medical Center, Chang Gung Memorial Hospital, Taoyuan 33378, Taiwan;
| | - Huei-Ching Chiu
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
| | - Ya-Hui Chang
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
| | - Yuan-Rong Tu
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
| | - Yun-Ting Lo
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
| | - Hsiang-Yu Lin
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
- Department of Nursing, Mackay Junior College of Medicine, Nursing and Management, Taipei 112021, Taiwan
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
| | - Shuan-Pei Lin
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-L.L.); (M.-R.C.); (H.-C.C.); (Y.-H.C.)
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei 10449, Taiwan;
- Department of Medicine, Mackay Medical College, New Taipei City 25245, Taiwan
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei 10449, Taiwan; (C.-K.C.); (Y.-R.T.)
- Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan
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8
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Viggiano M, Ceroni F, Visconti P, Posar A, Scaduto MC, Sandoni L, Baravelli I, Cameli C, Rochat MJ, Maresca A, Vaisfeld A, Gentilini D, Calzari L, Carelli V, Zody MC, Maestrini E, Bacchelli E. Genomic analysis of 116 autism families strengthens known risk genes and highlights promising candidates. NPJ Genom Med 2024; 9:21. [PMID: 38519481 PMCID: PMC10959942 DOI: 10.1038/s41525-024-00411-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 02/27/2024] [Indexed: 03/25/2024] Open
Abstract
Autism spectrum disorder (ASD) is a complex neurodevelopmental condition with a strong genetic component in which rare variants contribute significantly to risk. We performed whole genome and/or exome sequencing (WGS and WES) and SNP-array analysis to identify both rare sequence and copy number variants (SNVs and CNVs) in 435 individuals from 116 ASD families. We identified 37 rare potentially damaging de novo SNVs (pdSNVs) in the cases (n = 144). Interestingly, two of them (one stop-gain and one missense variant) occurred in the same gene, BRSK2. Moreover, the identification of 8 severe de novo pdSNVs in genes not previously implicated in ASD (AGPAT3, IRX5, MGAT5B, RAB8B, RAP1A, RASAL2, SLC9A1, YME1L1) highlighted promising candidates. Potentially damaging CNVs (pdCNVs) provided support to the involvement of inherited variants in PHF3, NEGR1, TIAM1 and HOMER1 in neurodevelopmental disorders (NDD), although mostly acting as susceptibility factors with incomplete penetrance. Interpretation of identified pdSNVs/pdCNVs according to the ACMG guidelines led to a molecular diagnosis in 19/144 cases, although this figure represents a lower limit and is expected to increase thanks to further clarification of the role of likely pathogenic variants in ASD/NDD candidate genes not yet established. In conclusion, our study highlights promising ASD candidate genes and contributes to characterize the allelic diversity, mode of inheritance and phenotypic impact of de novo and inherited risk variants in ASD/NDD genes.
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Affiliation(s)
- Marta Viggiano
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Fabiola Ceroni
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
- Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Paola Visconti
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOSI Disturbi dello Spettro Autistico, Bologna, Italy
| | - Annio Posar
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOSI Disturbi dello Spettro Autistico, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Maria Cristina Scaduto
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOSI Disturbi dello Spettro Autistico, Bologna, Italy
| | - Laura Sandoni
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Irene Baravelli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Cinzia Cameli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Magali J Rochat
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Functional and Molecular Neuroimaging Unit, Bologna, Italy
| | - Alessandra Maresca
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Programma di Neurogenetica, Bologna, Italy
| | - Alessandro Vaisfeld
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Davide Gentilini
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- Bioinformatics and Statistical Genomic Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Luciano Calzari
- Bioinformatics and Statistical Genomic Unit, IRCCS Istituto Auxologico Italiano, Milan, Italy
| | - Valerio Carelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Programma di Neurogenetica, Bologna, Italy
| | | | - Elena Maestrini
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.
| | - Elena Bacchelli
- Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.
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9
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Shangguan H, Huang X, Lin J, Chen R. Knockdown of Kmt2d leads to growth impairment by activating the Akt/β-catenin signaling pathway. G3 (BETHESDA, MD.) 2024; 14:jkad298. [PMID: 38263533 PMCID: PMC10917512 DOI: 10.1093/g3journal/jkad298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/20/2023] [Indexed: 01/25/2024]
Abstract
The KMT2D variant-caused Kabuki syndrome (KS) is characterized by short stature as a prominent clinical characteristic. The initiation and progression of body growth are fundamentally influenced by chondrocyte proliferation. Uncertainty persists regarding the possibility that KMT2D deficiency affects growth by impairing chondrocyte proliferation. In this study, we used the CRISPR/Cas13d technique to knockdown kmt2d in zebrafish embryos and lentivirus to create a stable Kmt2d gene knockdown cell line in chondrocytes (ATDC5 cells). We also used CCK8 and flow cytometric studies, respectively, to determine proliferation and cell cycle state. The relative concentrations of phosphorylated Akt (ser473), phosphorylated β-catenin (ser552), and cyclin D1 proteins in chondrocytes and zebrafish embryos were determined by using western blots. In addition, Akt inhibition was used to rescue the phenotypes caused by kmt2d deficiency in chondrocytes, as well as a zebrafish model that was generated. The results showed that a knockdown of kmt2d significantly decreased body length and resulted in aberrant cartilage development in zebrafish embryos. Furthermore, the knockdown of Kmt2d in ATDC5 cells markedly increased proliferation and accelerated the G1/S transition. In addition, the knockdown of Kmt2d resulted in the activation of the Akt/β-catenin signaling pathway in ATDC5 cells. Finally, Akt inhibition could partly rescue body length and chondrocyte development in the zebrafish model. Our study demonstrated that KMT2D modulates bone growth conceivably via regulation of the Akt/β-catenin pathway.
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Affiliation(s)
- Huakun Shangguan
- Department of Endocrinology, Genetics and Metabolism, Fuzhou Children’s Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Xiaozhen Huang
- Department of Endocrinology, Genetics and Metabolism, Fuzhou Children’s Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Jinduan Lin
- Department of Endocrinology, Genetics and Metabolism, Fuzhou Children’s Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Ruimin Chen
- Department of Endocrinology, Genetics and Metabolism, Fuzhou Children’s Hospital of Fujian Medical University, Fuzhou 350000, China
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10
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Pardo LM, Aanicai R, Zonic E, Hakonen AH, Zielske S, Bauer P, Bertoli-Avella AM. Adding to the evidence of gene-disease association of RAP1B and syndromic thrombocytopenia. Clin Genet 2024; 105:196-201. [PMID: 37850357 DOI: 10.1111/cge.14438] [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: 09/05/2023] [Revised: 09/29/2023] [Accepted: 10/02/2023] [Indexed: 10/19/2023]
Abstract
Syndromic constitutive thrombocytopenia encompasses a heterogeneous group of disorders characterised by quantitative and qualitative defects of platelets while featuring other malformations. Recently, heterozygous, de novo variants in RAP1B were reported in three cases of syndromic thrombocytopenia. Here, we report two additional, unrelated individuals identified retrospectively in our data repository with heterozygous variants in RAP1B: NM_001010942.2(RAP1B):c.35G>A, p.(Gly12Glu) (de novo) and NM_001010942.2(RAP1B):c.178G>A, p.(Gly60Arg). Both individuals had thrombocytopenia, as well as congenital malformations, and neurological, behavioural, and dysmorphic features, in line with previous reports. Our data supports the causal role of monoallelic RAP1B variants that disrupt RAP1B GTPase activity in syndromic congenital thrombocytopenia.
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Affiliation(s)
- Luba M Pardo
- Medical Genetics, Reporting & Research, CENTOGENE GmbH, Rostock, Germany
| | - Ruxandra Aanicai
- Medical Genetics, Reporting & Research, CENTOGENE GmbH, Rostock, Germany
| | - Emir Zonic
- Medical Genetics, Reporting & Research, CENTOGENE GmbH, Rostock, Germany
| | - Anna H Hakonen
- Department of Clinical Genetics, HUSLAB, HUS Diagnostic Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Susan Zielske
- Medical Genetics, Reporting & Research, CENTOGENE GmbH, Rostock, Germany
| | - Peter Bauer
- Medical Genetics, Reporting & Research, CENTOGENE GmbH, Rostock, Germany
- Department of Internal Medicine III - Hematology, Oncology, and Palliative Medicine, University of Rostock, Rostock, Germany
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11
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Shpargel KB, Quickstad G. SETting up the genome: KMT2D and KDM6A genomic function in the Kabuki syndrome craniofacial developmental disorder. Birth Defects Res 2023; 115:1885-1898. [PMID: 37800171 PMCID: PMC11190966 DOI: 10.1002/bdr2.2253] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/04/2023] [Accepted: 09/14/2023] [Indexed: 10/07/2023]
Abstract
BACKGROUND Kabuki syndrome is a congenital developmental disorder that is characterized by distinctive facial gestalt and skeletal abnormalities. Although rare, the disorder shares clinical features with several related craniofacial syndromes that manifest from mutations in chromatin-modifying enzymes. Collectively, these clinical studies underscore the crucial, concerted functions of chromatin factors in shaping developmental genome structure and driving cellular transcriptional states. Kabuki syndrome predominantly results from mutations in KMT2D, a histone H3 lysine 4 methylase, or KDM6A, a histone H3 lysine 27 demethylase. AIMS In this review, we summarize the research efforts to model Kabuki syndrome in vivo to understand the cellular and molecular mechanisms that lead to the craniofacial and skeletal pathogenesis that defines the disorder. DISCUSSION As several studies have indicated the importance of KMT2D and KDM6A function through catalytic-independent mechanisms, we highlight noncanonical roles for these enzymes as recruitment centers for alternative chromatin and transcriptional machinery.
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Affiliation(s)
- Karl B. Shpargel
- Department of GeneticsUniversity of North CarolinaChapel HillNorth CarolinaUSA
| | - Gabrielle Quickstad
- Department of GeneticsUniversity of North CarolinaChapel HillNorth CarolinaUSA
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12
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Deng XX, Jin BW, Li SS, Zhou HM, Shen QS, Li YY. Pulmonary hypertension- a novel phenotypic hypothesis of Kabuki syndrome: a case report and literature review. BMC Pediatr 2023; 23:429. [PMID: 37641008 PMCID: PMC10463411 DOI: 10.1186/s12887-023-04273-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 08/23/2023] [Indexed: 08/31/2023] Open
Abstract
BACKGROUND Pediatric pulmonary hypertension (PH) is a serious and rare disease that is often derived from genetic mutations. Kabuki syndrome (KS) is a chromosomal abnormality disease that has its origin in the mutation of lysine methyltransferase 2D(KMT2D). Recent evidence has shown that KMT2D mutations are associated with pediatric pulmonary disorders. However, the relationship between the clinical courses of PH and the KMT2D mutation is reported in extremely few cases. Therefore, in this paper, a case was presented and previous literature was reviewed for better understanding of the correlation between pediatric PH and KMT2D mutations. CASE PRESENTATION A 3-year-old girl was transferred to our center for severe cough, shortness of breath, fatigue and fever. Physical examination revealed facial deformities and growth retardation. Echocardiography showed a small atrial septal defect (ASD), and right heart catheterization indicated a significant increase in pulmonary vascular pressure and resistance. The genetic test suggested that she had a KMT2D gene mutation. The patient was finally diagnosed with KS. She was given targeted drugs to reduce pulmonary vascular pressure, but the effect was unsatisfactory. CONCLUSIONS KS can be complicated with multiple organ malformations and dysfunction. With the progress of next generation sequencing, an increasing number of new phenotypes related to KMT2D mutations have been reported. A bold hypothesis is proposed in this article, that is, PH may be a new phenotype associated with KMT2D mutations. It is suggested that KS and PH should be differentiated from each other to avoid delayed diagnosis and treatment in clinical practice. There is no specific drug for KS treatment. The prognosis of children with inherited PH is usually poor, and lung transplantation may increase their survival rates.
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Affiliation(s)
- Xiao-Xian Deng
- Congenital Heart Disease Center, Wuhan Asia Heart Hospital, 753 Jinghan Road, Wuhan, 430022, China
| | - Bo-Wen Jin
- Congenital Heart Disease Center, Wuhan Asia Heart Hospital, 753 Jinghan Road, Wuhan, 430022, China
| | - Shan-Shan Li
- Congenital Heart Disease Center, Wuhan Asia Heart Hospital, 753 Jinghan Road, Wuhan, 430022, China
| | - Hong-Mei Zhou
- Congenital Heart Disease Center, Wuhan Asia Heart Hospital, 753 Jinghan Road, Wuhan, 430022, China
| | - Qun-Shan Shen
- Congenital Heart Disease Center, Wuhan Asia Heart Hospital, 753 Jinghan Road, Wuhan, 430022, China
| | - Yun-Yan Li
- Congenital Heart Disease Center, Wuhan Asia Heart Hospital, 753 Jinghan Road, Wuhan, 430022, China.
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13
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Chen Q, Ying H, Yu Z, Chang L, Chen Z, Chen J, Chang SJ, Qiu Y, Lin X. Apelin Receptor Can Act as a Specific Marker and Promising Therapeutic Target for Infantile Hemangioma. J Invest Dermatol 2023; 143:566-577.e12. [PMID: 36243122 DOI: 10.1016/j.jid.2022.09.657] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 09/20/2022] [Accepted: 09/26/2022] [Indexed: 11/15/2022]
Abstract
Infantile hemangioma (IH), the most common benign tumor in infancy, is generally sensitive to propranolol treatment. However, the challenge remains because resistance or recurrence could occur in some patients, and the mechanism or target of propranolol remains unknown. Therefore, advancement in the drug development is needed. In this study, we explored whether apelin receptor (APJ) can become a candidate target. We found that APJ is expressed only in endothelial cells of IH (HemECs) but not in other vascular anomalies, and its antagonist, ML221, can negatively regulate cellular viability and functions of HemECs. This inhibitory effect could be replicated in a murine hemangioma model. Importantly, in vitro experiments also indicated that ML221 failed to affect the proliferation or angiogenesis of normal endothelial cells or APJ-knockout HemECs. Through analysis of the phosphoantibody microarray data, ML221 was revealed to have an inhibitory effect on HemECs by suppressing the activation of mitogen-activated protein kinase/extracellular signal-regulated kinase pathway. These results verified the distinctive expression of APJ in IH and specific inhibition of HemEC activity caused by ML221. In addition, APJ was also detected in propranolol-resistant IH. Collectively, we propose that APJ can act as a specific marker and a promising therapeutic target for IH, which will facilitate further drug development.
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Affiliation(s)
- Qianyi Chen
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Hanru Ying
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Zhang Yu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Lei Chang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Zongan Chen
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jialin Chen
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Shih-Jen Chang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yajing Qiu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Xiaoxi Lin
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China; Department of Laser and Aesthetic Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
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14
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Aukema SM, Glaser S, van den Hout MFCM, Dahlum S, Blok MJ, Hillmer M, Kolarova J, Sciot R, Schott DA, Siebert R, Stumpel CTRM. Molecular characterization of an embryonal rhabdomyosarcoma occurring in a patient with Kabuki syndrome: report and literature review in the light of tumor predisposition syndromes. Fam Cancer 2023; 22:103-118. [PMID: 35856126 PMCID: PMC9829644 DOI: 10.1007/s10689-022-00306-z] [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: 05/04/2022] [Accepted: 07/05/2022] [Indexed: 01/13/2023]
Abstract
Kabuki syndrome is a well-recognized syndrome characterized by facial dysmorphism and developmental delay/intellectual disability and in the majority of patients a germline variant in KMT2D is found. As somatic KMT2D variants can be found in 5-10% of tumors a tumor predisposition in Kabuki syndrome is discussed. So far less than 20 patients with Kabuki syndrome and a concomitant malignancy have been published. Here we report on a female patient with Kabuki syndrome and a c.2558_2559delCT germline variant in KMT2D who developed an embryonal rhabdomyosarcoma (ERMS) at 10 years. On tumor tissue we performed DNA-methylation profiling and exome sequencing (ES). Copy number analyses revealed aneuploidies typical for ERMS including (partial) gains of chromosomes 2, 3, 7, 8, 12, 15, and 20 and 3 focal deletions of chromosome 11p. DNA methylation profiling mapped the case to ERMS by a DNA methylation-based sarcoma classifier. Sequencing suggested gain of the wild-type KMT2D allele in the trisomy 12. Including our patient literature review identified 18 patients with Kabuki syndrome and a malignancy. Overall, the landscape of malignancies in patients with Kabuki syndrome was reminiscent of that of the pediatric population in general. Histopathological and molecular data were only infrequently reported and no report included next generation sequencing and/or DNA-methylation profiling. Although we found no strong arguments pointing towards KS as a tumor predisposition syndrome, based on the small numbers any relation cannot be fully excluded. Further planned studies including profiling of additional tumors and long term follow-up of KS-patients into adulthood could provide further insights.
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Affiliation(s)
- Sietse M Aukema
- Department of Clinical Genetics, Maastricht University Medical Centre (MUMC+), PO Box 5800, 6202 AZ, Maastricht, The Netherlands.
| | - Selina Glaser
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Mari F C M van den Hout
- Department of Pathology, Research Institute GROW, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Sonja Dahlum
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Marinus J Blok
- Department of Clinical Genetics, Maastricht University Medical Centre (MUMC+), PO Box 5800, 6202 AZ, Maastricht, The Netherlands
| | - Morten Hillmer
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Julia Kolarova
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Raf Sciot
- Department of Pathology, University Hospital, University of Leuven, 3000, Louvain, Belgium
| | - Dina A Schott
- Department of Clinical Genetics, Maastricht University Medical Centre (MUMC+), PO Box 5800, 6202 AZ, Maastricht, The Netherlands
- Department of Pediatrics, Zuyderland Medical Center, Heerlen, The Netherlands
| | - Reiner Siebert
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
| | - Constance T R M Stumpel
- Department of Clinical Genetics, Maastricht University Medical Centre (MUMC+), PO Box 5800, 6202 AZ, Maastricht, The Netherlands.
- Department of Clinical Genetics and GROW-School for Oncology & Developmental Biology, Maastricht University Medical Center+, Maastricht, The Netherlands.
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15
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Usluer E, Sayın GY, Güneş N, Kasap B, Tüysüz B. Investigation of genetic and phenotypic heterogeneity in 37 Turkish patients with Kabuki and Kabuki-like phenotype. Am J Med Genet A 2022; 188:2976-2987. [PMID: 36097644 DOI: 10.1002/ajmg.a.62944] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 06/16/2022] [Accepted: 07/20/2022] [Indexed: 01/31/2023]
Abstract
Kabuki syndrome (KS) is a rare disorder characterized by distinct face, persistent fingertip pads, and intellectual disability (ID) caused by mutation in KMT2D (56%-76%) or KDM6A (5%-8%). Thirty-seven children aged 1-16 years who followed for median of 6.8 years were included in this study, which aimed to investigate the genetic and clinical characteristics of KS patients. KMT2D and KDM6A were evaluated by sequencing and multiplex-ligation-dependent probe amplification in 32 patients. Twenty-one pathogenic variants in KMT2D, of which 17 were truncated and nine were novel, one frame-shift novel variant in KDM6A were identified. The molecular diagnosis rate was 68.7% (22/32). In the whole-exome sequencing analysis performed in the remaining patients, no pathogenic variant that could cause any disease was detected. All patients had ID; 43.2% were severe and moderate. We observed that facial features that became more prominent with age were enough for a possible diagnosis of KS in infancy. The frequencies of facial features, cardiac and renal anomalies, short stature, microcephaly, and epilepsy did not differ depending on whether they had truncating or nontruncating variants or were in variant-negative KS-like group. This study has expanded clinical features of the disease, as well as identified new variants in genes causing KS.
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Affiliation(s)
- Esra Usluer
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Gözde Yeşil Sayın
- Department of Medical Genetics, Bezmialem University, Medical School, Istanbul, Turkey
| | - Nilay Güneş
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Buşra Kasap
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Beyhan Tüysüz
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Istanbul, Turkey
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Di Fede E, Grazioli P, Lettieri A, Parodi C, Castiglioni S, Taci E, Colombo EA, Ancona S, Priori A, Gervasini C, Massa V. Epigenetic disorders: Lessons from the animals–animal models in chromatinopathies. Front Cell Dev Biol 2022; 10:979512. [PMID: 36225316 PMCID: PMC9548571 DOI: 10.3389/fcell.2022.979512] [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: 06/27/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
Chromatinopathies are defined as genetic disorders caused by mutations in genes coding for protein involved in the chromatin state balance. So far 82 human conditions have been described belonging to this group of congenital disorders, sharing some molecular features and clinical signs. For almost all of these conditions, no specific treatment is available. For better understanding the molecular cascade caused by chromatin imbalance and for envisaging possible therapeutic strategies it is fundamental to combine clinical and basic research studies. To this end, animal modelling systems represent an invaluable tool to study chromatinopathies. In this review, we focused on available data in the literature of animal models mimicking the human genetic conditions. Importantly, affected organs and abnormalities are shared in the different animal models and most of these abnormalities are reported as clinical manifestation, underlying the parallelism between clinics and translational research.
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Affiliation(s)
- Elisabetta Di Fede
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Paolo Grazioli
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Antonella Lettieri
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Chiara Parodi
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Silvia Castiglioni
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Esi Taci
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Elisa Adele Colombo
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Silvia Ancona
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
| | - Alberto Priori
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
- “Aldo Ravelli” Center for Neurotechnology and Experimental Brain Therapeutics, Università Degli Studi di Milano, Milan, Italy
| | - Cristina Gervasini
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
- “Aldo Ravelli” Center for Neurotechnology and Experimental Brain Therapeutics, Università Degli Studi di Milano, Milan, Italy
| | - Valentina Massa
- Department of Health Sciences, Università Degli Studi di Milano, Milan, Italy
- “Aldo Ravelli” Center for Neurotechnology and Experimental Brain Therapeutics, Università Degli Studi di Milano, Milan, Italy
- *Correspondence: Valentina Massa,
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17
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Miller D, Saeed A, Nelson AC, Bower M, Aggarwal A. Third reported patient with RAP1B-related syndromic thrombocytopenia and novel clinical findings. Am J Med Genet A 2022; 188:2808-2814. [PMID: 35451551 PMCID: PMC9543813 DOI: 10.1002/ajmg.a.62760] [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: 02/18/2022] [Revised: 03/28/2022] [Accepted: 04/01/2022] [Indexed: 01/25/2023]
Abstract
RAP1B is a RAS-superfamily small GTP-binding protein involved in numerous cell processes. Pathogenic gain-of-function variants in this gene have been associated with RAP1B-related syndromic thrombocytopenia, an ultrarare disorder characterized by hematologic abnormalities, neurodevelopmental delays, growth delay, and congenital birth defects including cardiovascular, genitourinary, neurologic, and skeletal systems. We report a 23-year-old male with a novel, de novo RAP1B gain-of-function variant identified on genome sequencing. This is the third reported case which expands the molecular and phenotypic spectrum of RAP1B-related syndromic thrombocytopenia.
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Affiliation(s)
| | - Azhar Saeed
- Department of Laboratory Medicine and PathologyUniversity of MinnesotaMinneapolisMinnesotaUSA
| | - Andrew C. Nelson
- Department of Laboratory Medicine and PathologyUniversity of MinnesotaMinneapolisMinnesotaUSA
| | | | - Anjali Aggarwal
- Division of Genetics and Metabolism, Department of PediatricsUniversity of MinnesotaMinneapolisMinnesotaUSA
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18
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Dougnon G, Matsui H. Modelling Autism Spectrum Disorder (ASD) and Attention-Deficit/Hyperactivity Disorder (ADHD) Using Mice and Zebrafish. Int J Mol Sci 2022; 23:ijms23147550. [PMID: 35886894 PMCID: PMC9319972 DOI: 10.3390/ijms23147550] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 02/06/2023] Open
Abstract
Autism spectrum disorders (ASD) and attention-deficit/hyperactivity disorder (ADHD) are two debilitating neurodevelopmental disorders. The former is associated with social impairments whereas the latter is associated with inattentiveness, hyperactivity, and impulsivity. There is recent evidence that both disorders are somehow related and that genes may play a large role in these disorders. Despite mounting human and animal research, the neurological pathways underlying ASD and ADHD are still not well understood. Scientists investigate neurodevelopmental disorders by using animal models that have high similarities in genetics and behaviours with humans. Mice have been utilized in neuroscience research as an excellent animal model for a long time; however, the zebrafish has attracted much attention recently, with an increasingly large number of studies using this model. In this review, we first discuss ASD and ADHD aetiology from a general point of view to their characteristics and treatments. We also compare mice and zebrafish for their similarities and discuss their advantages and limitations in neuroscience. Finally, we summarize the most recent and existing research on zebrafish and mouse models of ASD and ADHD. We believe that this review will serve as a unique document providing interesting information to date about these models, thus facilitating research on ASD and ADHD.
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19
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Wang S, Wang D, Chang Y, Geng L, Qiang P, Sun G, Tang B, Zhao X, Zhou Z, Liu H. Elevated RAP1A expression correlates with the severity of acute GVHD after umbilical cord blood transplantation. Transpl Immunol 2022; 71:101546. [DOI: 10.1016/j.trim.2022.101546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/15/2022] [Accepted: 01/25/2022] [Indexed: 12/24/2022]
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20
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Sun Q, Zhou Y, Xiong M, Chen Y, Tan WS, Cai H. MEK1 activation enhances the ex vivo proliferation of haematopoietic stem/progenitor cell. Cell Biochem Funct 2021; 40:79-89. [PMID: 34855220 DOI: 10.1002/cbf.3677] [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: 07/06/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 11/11/2022]
Abstract
Haematopoietic stem/progenitor cell (HSPC) integrates intracellular signal network from growth factors (GFs) and utilizes its proliferation feature to generate high yields of transplantable cells upon ex vivo culture. However, the molecular basis for HSPC activation and proliferation is not completely understood. The goal of this study was to investigate proliferation regulator in the downstream of GFs and develop HSPC expansion strategy. Microarray and Ingenuity Pathway Analysis were performed to evaluate differentially expressed genes in cytokine-induced CD34+ cells after ex vivo culture. We identified that MEK1 was a potential HSPC proliferation regulator, which represented indispensable roles and MEK1 silence attenuated the proliferation of HSPC. Notably, 500 nM MEK1 agonist, PAF C-16, increased the numbers of phenotypic HSPC and induced cell cycling of HSPC. The PAF C-16 expanded HSPC demonstrated comparative clonal formation ability and secondary expansion capacity compared to the vehicle control. Our results provide insights into regulating the balance between proliferation and commitment of HSPC by targeting the HSPC proliferation-controlling network. This study demonstrates that MEK1 critically regulates HSPC proliferation and cell production in the ex vivo condition for transplantation.
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Affiliation(s)
- Qihao Sun
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yiran Zhou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Minghao Xiong
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Yuying Chen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Wen-Song Tan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
| | - Haibo Cai
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
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21
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Zhang L, Pilarowski G, Pich EM, Nakatani A, Dunlop J, Baba R, Matsuda S, Daini M, Hattori Y, Matsumoto S, Ito M, Kimura H, Bjornsson HT. Inhibition of KDM1A activity restores adult neurogenesis and improves hippocampal memory in a mouse model of Kabuki syndrome. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2021; 20:779-791. [PMID: 33738331 PMCID: PMC7940709 DOI: 10.1016/j.omtm.2021.02.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 02/14/2021] [Indexed: 12/13/2022]
Abstract
Kabuki syndrome (KS) is a rare cause of intellectual disability primarily caused by loss-of-function mutations in lysine-specific methyltransferase 2D (KMT2D), which normally adds methyl marks to lysine 4 on histone 3. Previous studies have shown that a mouse model of KS (Kmt2d+/βGeo) demonstrates disruption of adult neurogenesis and hippocampal memory. Proof-of-principle studies have shown postnatal rescue of neurological dysfunction following treatments that promote chromatin opening; however, these strategies are non-specific and do not directly address the primary defect of histone methylation. Since lysine-specific demethylase 1A (LSD1/KDM1A) normally removes the H3K4 methyl marks added by KMT2D, we hypothesized that inhibition of KDM1A demethylase activity may ameliorate molecular and phenotypic defects stemming from KMT2D loss. To test this hypothesis, we evaluated a recently developed KDM1A inhibitor (TAK-418) in Kmt2d+/βGeo mice. We found that orally administered TAK-418 increases the numbers of newly born doublecortin (DCX)+ cells and processes in the hippocampus in a dose-dependent manner. We also observed TAK-418-dependent rescue of histone modification defects in hippocampus both by western blot and chromatin immunoprecipitation sequencing (ChIP-seq). Treatment rescues gene expression abnormalities including those of immediate early genes such as FBJ osteosarcoma oncogene (Fos) and FBJ osteosarcoma oncogene homolog B (Fosb). After 2 weeks of TAK-418, Kmt2d+/βGeo mice demonstrated normalization of hippocampal memory defects. In summary, our data suggest that KDM1A inhibition is a plausible treatment strategy for KS and support the hypothesis that the epigenetic dysregulation secondary to KMT2D dysfunction plays a major role in the postnatal neurological disease phenotype in KS.
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Affiliation(s)
- Li Zhang
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Genay Pilarowski
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | | | - Atsushi Nakatani
- Takeda Pharmaceutical Company Limited, Fujisawa, Kanagawa, Japan
| | - John Dunlop
- Takeda Pharmaceutical Company Limited, London, UK
| | - Rina Baba
- Takeda Pharmaceutical Company Limited, Fujisawa, Kanagawa, Japan
| | - Satoru Matsuda
- Takeda Pharmaceutical Company Limited, Fujisawa, Kanagawa, Japan
| | - Masaki Daini
- Takeda Pharmaceutical Company Limited, Fujisawa, Kanagawa, Japan
| | - Yasushi Hattori
- Takeda Pharmaceutical Company Limited, Fujisawa, Kanagawa, Japan
| | | | - Mitsuhiro Ito
- Takeda Pharmaceutical Company Limited, Fujisawa, Kanagawa, Japan
| | - Haruhide Kimura
- Takeda Pharmaceutical Company Limited, Fujisawa, Kanagawa, Japan
| | - Hans Tomas Bjornsson
- McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik 101, Iceland
- Landspitali University Hospital, Reykjavik 101, Iceland
- Corresponding author: Hans Tomas Bjornsson, McKusick-Nathans Department of Genetic Medicine, Johns Hopkins University School of Medicine, 733 North Broadway Street, MRB 415, Baltimore, MD 21205, USA.
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22
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p-MEK expression predicts prognosis of patients with adenocarcinoma of esophagogastric junction (AEG) and plays a role in anti-AEG efficacy of Huaier. Pharmacol Res 2021; 165:105411. [PMID: 33401002 DOI: 10.1016/j.phrs.2020.105411] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/23/2022]
Abstract
The incidence rate of adenocarcinoma of the esophagogastric junction (AEG) is increasing worldwide with poor prognosis and unclear pathogenesis. Trametes robiniophila Murr. (Huaier), a traditional Chinese medicine has been used in the clinical treatment of a variety of solid tumors, including AEG. However, its anticancer components and molecular mechanisms are still unclear. In our previous studies, we have found that Huaier n-butanol extract (HBE) shows the most potent anticancer activity among different extracts. In the present study, we aimed to investigate the clinical relevance of p-MEK expression in AEG patients and the role of the MEK/ERK signaling pathway in the anti-AEG efficacy of HBE in vitro and in vivo. We herein demonstrate that p-MEK expression in AEG tissues was significantly higher than that in paracancerous tissues and correlated with a poor prognosis in AEG patients. We further found that HBE inhibited the colony formation, migration, and invasion in AEG cell lines in a concentration-dependent manner in vitro. HBE also suppressed the growth of AEG xenograft tumors without causing any host toxicity in vivo. Mechanistically, HBE caused the inactivation of the MEK/ERK signaling pathway by dephosphorylating MEK1 at S298, ERK1 at T202, and ERK2 at T185 and modulating the expression of EMT-related proteins. In summary, our results demonstrate that the high expression of p-MEK may be an independent factor of poor prognosis in patients with AEG. The clinically used anticancer drug Huaier may exert its anti-AEG efficacy by inhibiting the MEK/ERK signaling pathway.
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Schwenty-Lara J, Pauli S, Borchers A. Using Xenopus to analyze neurocristopathies like Kabuki syndrome. Genesis 2020; 59:e23404. [PMID: 33351273 DOI: 10.1002/dvg.23404] [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: 10/23/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 11/08/2022]
Abstract
Neurocristopathies are human congenital syndromes that arise from defects in neural crest (NC) development and are typically associated with malformations of the craniofacial skeleton. Genetic analyses have been very successful in identifying pathogenic mutations, however, model organisms are required to characterize how these mutations affect embryonic development thereby leading to complex clinical conditions. The African clawed frog Xenopus laevis provides a broad range of in vivo and in vitro tools allowing for a detailed characterization of NC development. Due to the conserved nature of craniofacial morphogenesis in vertebrates, Xenopus is an efficient and versatile system to dissect the morphological and cellular phenotypes as well as the signaling events leading to NC defects. Here, we review a set of techniques and resources how Xenopus can be used as a disease model to investigate the pathogenesis of Kabuki syndrome and neurocristopathies in a wider sense.
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Affiliation(s)
- Janina Schwenty-Lara
- Department of Biology, Molecular Embryology, Philipps-University Marburg, Marburg, Germany
| | - Silke Pauli
- Institute of Human Genetics, University Medical Center Göttingen, Göttingen, Germany
| | - Annette Borchers
- Department of Biology, Molecular Embryology, Philipps-University Marburg, Marburg, Germany.,DFG Research Training Group, Membrane Plasticity in Tissue Development and Remodeling, GRK 2213, Philipps-University Marburg, Marburg, Germany
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24
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Pensado-López A, Veiga-Rúa S, Carracedo Á, Allegue C, Sánchez L. Experimental Models to Study Autism Spectrum Disorders: hiPSCs, Rodents and Zebrafish. Genes (Basel) 2020; 11:E1376. [PMID: 33233737 PMCID: PMC7699923 DOI: 10.3390/genes11111376] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/26/2020] [Accepted: 11/18/2020] [Indexed: 02/07/2023] Open
Abstract
Autism Spectrum Disorders (ASD) affect around 1.5% of the global population, which manifest alterations in communication and socialization, as well as repetitive behaviors or restricted interests. ASD is a complex disorder with known environmental and genetic contributors; however, ASD etiology is far from being clear. In the past decades, many efforts have been put into developing new models to study ASD, both in vitro and in vivo. These models have a lot of potential to help to validate some of the previously associated risk factors to the development of the disorder, and to test new potential therapies that help to alleviate ASD symptoms. The present review is focused on the recent advances towards the generation of models for the study of ASD, which would be a useful tool to decipher the bases of the disorder, as well as to conduct drug screenings that hopefully lead to the identification of useful compounds to help patients deal with the symptoms of ASD.
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Affiliation(s)
- Alba Pensado-López
- Department of Zoology, Genetics and Physical Anthropology, Universidade de Santiago de Compostela, Campus de Lugo, 27002 Lugo, Spain; (A.P.-L.); (S.V.-R.)
- Genomic Medicine Group, Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain;
| | - Sara Veiga-Rúa
- Department of Zoology, Genetics and Physical Anthropology, Universidade de Santiago de Compostela, Campus de Lugo, 27002 Lugo, Spain; (A.P.-L.); (S.V.-R.)
- Genomic Medicine Group, Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain;
| | - Ángel Carracedo
- Genomic Medicine Group, Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain;
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), CIMUS, Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Catarina Allegue
- Genomic Medicine Group, Center for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Spain;
| | - Laura Sánchez
- Department of Zoology, Genetics and Physical Anthropology, Universidade de Santiago de Compostela, Campus de Lugo, 27002 Lugo, Spain; (A.P.-L.); (S.V.-R.)
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25
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MLL4-associated condensates counterbalance Polycomb-mediated nuclear mechanical stress in Kabuki syndrome. Nat Genet 2020; 52:1397-1411. [PMID: 33169020 PMCID: PMC7610431 DOI: 10.1038/s41588-020-00724-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 09/22/2020] [Indexed: 12/21/2022]
Abstract
The genetic elements required to tune gene expression are partitioned in active and repressive nuclear condensates. Chromatin compartments include transcriptional clusters whose dynamic establishment and functioning depend on multivalent interactions occurring among transcription factors, cofactors and basal transcriptional machinery. However, how chromatin players contribute to the assembly of transcriptional condensates is poorly understood. By interrogating the effect of KMT2D (also known as MLL4) haploinsufficiency in Kabuki syndrome, we found that mixed lineage leukemia 4 (MLL4) contributes to the assembly of transcriptional condensates through liquid-liquid phase separation. MLL4 loss of function impaired Polycomb-dependent chromatin compartmentalization, altering the nuclear architecture. By releasing the nuclear mechanical stress through inhibition of the mechanosensor ATR, we re-established the mechanosignaling of mesenchymal stem cells and their commitment towards chondrocytes both in vitro and in vivo. This study supports the notion that, in Kabuki syndrome, the haploinsufficiency of MLL4 causes an altered functional partitioning of chromatin, which determines the architecture and mechanical properties of the nucleus.
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26
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Mina M, Iyer A, Tavernari D, Raynaud F, Ciriello G. Discovering functional evolutionary dependencies in human cancers. Nat Genet 2020; 52:1198-1207. [DOI: 10.1038/s41588-020-0703-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/26/2020] [Indexed: 02/07/2023]
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Piro E, Schierz IAM, Antona V, Pappalardo MP, Giuffrè M, Serra G, Corsello G. Neonatal hyperinsulinemic hypoglycemia: case report of kabuki syndrome due to a novel KMT2D splicing-site mutation. Ital J Pediatr 2020; 46:136. [PMID: 32948218 PMCID: PMC7499940 DOI: 10.1186/s13052-020-00902-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/15/2020] [Indexed: 12/19/2022] Open
Abstract
Background Persistent neonatal hypoglycemia, owing to the possibility of severe neurodevelopmental consequences, is a leading cause of neonatal care admission. Hyperinsulinemic hypoglycemia is often resistant to dextrose infusion and needs rapid diagnosis and treatment. Several congenital conditions, from single gene defects to genetic syndromes should be considered in the diagnostic approach. Kabuki syndrome type 1 (MIM# 147920) and Kabuki syndrome type 2 (MIM# 300867), can be associated with neonatal hyperinsulinemic hypoglycemia. Patient presentation We report a female Italian (Sicilian) child, born preterm at 35 weeks gestation, with persistent hypoglycemia. Peculiar facial dysmorphisms, neonatal hypotonia, and cerebellar vermis hypoplasia raised suspicion of Kabuki syndrome. Hyperinsulinemic hypoglycemia was confirmed with glucagon test and whole-exome sequencing (WES) found a novel heterozygous splicing-site mutation (c.674-1G > A) in KMT2D gene. Hyperinsulinemic hypoglycemia was successfully treated with diazoxide. At 3 months corrected age for prematurity, a mild global neurodevelopmental delay, postnatal weight and occipitofrontal circumference growth failure were reported. Conclusions Kabuki syndrome should be considered when facing neonatal persistent hypoglycemia. Diazoxide may help to improve hyperinsulinemic hypoglycemia. A multidisciplinary and individualized follow-up should be carried out for early diagnosis and treatment of severe pathological associated conditions.
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Affiliation(s)
- Ettore Piro
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University Hospital "P.Giaccone", University of Palermo, Piazza delle Cliniche, 2, 90127, Palermo, Italy.
| | - Ingrid Anne Mandy Schierz
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University Hospital "P.Giaccone", University of Palermo, Piazza delle Cliniche, 2, 90127, Palermo, Italy
| | - Vincenzo Antona
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University Hospital "P.Giaccone", University of Palermo, Piazza delle Cliniche, 2, 90127, Palermo, Italy
| | - Maria Pia Pappalardo
- Pediatric Radiology Unit, A.R.N.A.S. Ospedali Civico Di Cristina Benfratelli, Piazza N. Leotta, 4, 90127, Palermo, Italy
| | - Mario Giuffrè
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University Hospital "P.Giaccone", University of Palermo, Piazza delle Cliniche, 2, 90127, Palermo, Italy
| | - Gregorio Serra
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University Hospital "P.Giaccone", University of Palermo, Piazza delle Cliniche, 2, 90127, Palermo, Italy
| | - Giovanni Corsello
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties "G. D'Alessandro", University Hospital "P.Giaccone", University of Palermo, Piazza delle Cliniche, 2, 90127, Palermo, Italy
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Garland MA, Sun B, Zhang S, Reynolds K, Ji Y, Zhou CJ. Role of epigenetics and miRNAs in orofacial clefts. Birth Defects Res 2020; 112:1635-1659. [PMID: 32926553 DOI: 10.1002/bdr2.1802] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 08/17/2020] [Accepted: 08/23/2020] [Indexed: 12/13/2022]
Abstract
Orofacial clefts (OFCs) have multiple etiologies and likely result from an interplay between genetic and environmental factors. Within the last decade, studies have implicated specific epigenetic modifications and noncoding RNAs as additional facets of OFC etiology. Altered gene expression through DNA methylation and histone modification offer novel insights into how specific genes contribute to distinct OFC subtypes. Epigenetics research has also provided further evidence that cleft lip only (CLO) is a cleft subtype with distinct etiology. Polymorphisms or misexpression of genes encoding microRNAs, as well as their targets, contribute to OFC risk. The ability to experimentally manipulate epigenetic changes and noncoding RNAs in animal models, such as zebrafish, Xenopus, mice, and rats, has offered novel insights into the mechanisms of various OFC subtypes. Although much remains to be understood, recent advancements in our understanding of OFC etiology may advise future strategies of research and preventive care.
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Affiliation(s)
- Michael A Garland
- Department of Biochemistry and Molecular Medicine, University of California at Davis, School of Medicine, Sacramento, California, USA.,Institute for Pediatric Regenerative Medicine of Shriners Hospitals for Children, University of California at Davis, School of Medicine, Sacramento, California, USA
| | - Bo Sun
- Department of Biochemistry and Molecular Medicine, University of California at Davis, School of Medicine, Sacramento, California, USA.,Institute for Pediatric Regenerative Medicine of Shriners Hospitals for Children, University of California at Davis, School of Medicine, Sacramento, California, USA
| | - Shuwen Zhang
- Department of Biochemistry and Molecular Medicine, University of California at Davis, School of Medicine, Sacramento, California, USA.,Institute for Pediatric Regenerative Medicine of Shriners Hospitals for Children, University of California at Davis, School of Medicine, Sacramento, California, USA
| | - Kurt Reynolds
- Department of Biochemistry and Molecular Medicine, University of California at Davis, School of Medicine, Sacramento, California, USA.,Institute for Pediatric Regenerative Medicine of Shriners Hospitals for Children, University of California at Davis, School of Medicine, Sacramento, California, USA.,Biochemistry, Molecular, Cellular, and Developmental Biology (BMCDB) graduate group, University of California, Davis, California, USA
| | - Yu Ji
- Department of Biochemistry and Molecular Medicine, University of California at Davis, School of Medicine, Sacramento, California, USA.,Institute for Pediatric Regenerative Medicine of Shriners Hospitals for Children, University of California at Davis, School of Medicine, Sacramento, California, USA.,Biochemistry, Molecular, Cellular, and Developmental Biology (BMCDB) graduate group, University of California, Davis, California, USA
| | - Chengji J Zhou
- Department of Biochemistry and Molecular Medicine, University of California at Davis, School of Medicine, Sacramento, California, USA.,Institute for Pediatric Regenerative Medicine of Shriners Hospitals for Children, University of California at Davis, School of Medicine, Sacramento, California, USA.,Biochemistry, Molecular, Cellular, and Developmental Biology (BMCDB) graduate group, University of California, Davis, California, USA
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29
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Abstract
Kabuki syndrome (KS) is characterized by typical facial features and patients are also affected by multiple congenital anomalies, of which congenital heart anomalies (CHAs) are present in 28.0 to 80.0%. In approximately 75.0% of patients, the genetic causes of KS are caused by mutation in the KMT2D gene. Although KS is a well-characterized syndrome, reaching the diagnosis in neonates is still challenging. Namely, newborns usually display mild facial features; therefore the diagnosis is mainly based on congenital malformations. In our case, a newborn was referred for next generation sequencing (NGS) testing due to the prenatally observed CHA. After birth, a ventricular septal defect (VSD), vesicoureteral reflux, muscular hypotonia, cleft palate, mild microcephaly, and some dysmorphic features, were noted. The NGS analysis was performed on the proband’s genomic DNA using the TruSight One Sequencing Panel, which enriches exons of 4813 genes with clinical relevance to the disease. After variant calling, NGS data analysis was predominantly focused on rare variants in genes involved in VSD, microcephaly, and muscular hypotonia; features observed predominantly in our proband. With the aforementioned protocol, we were able to determine the previously unreported de novo frameshift deletion in the KMT2D gene resulting in translation termination. Although our proband is a typical representative of KS, his diagnosis was reached only after NGS analysis. Our proband thus represents the importance of genotypephenotype driven NGS analysis in diagnosis of patients with congenital anomalies.
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30
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Adeola HA, Khumalo NP, Arowolo AT, Mehlala N. No difference in the proteome of racially and geometrically classified scalp hair sample from a South African cohort: Preliminary findings. J Proteomics 2020; 226:103892. [DOI: 10.1016/j.jprot.2020.103892] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 02/07/2023]
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31
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Niemann JH, Du C, Morlot S, Schmidt G, Auber B, Kaune B, Göhring G, Ripperger T, Schlegelberger B, Hofmann W, Smol T, Ait-Yahya E, Raimbault A, Lambilliotte A, Petit F, Steinemann D. De novo missense variants in the RAP1B gene identified in two patients with syndromic thrombocytopenia. Clin Genet 2020; 98:374-378. [PMID: 32627184 DOI: 10.1111/cge.13807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/15/2020] [Accepted: 06/30/2020] [Indexed: 11/27/2022]
Abstract
We present two independent cases of syndromic thrombocytopenia with multiple malformations, microcephaly, learning difficulties, dysmorphism and other features. Exome sequencing identified two novel de novo heterozygous variants in these patients, c.35G>T p.(Gly12Val) and c.178G>C p.(Gly60Arg), in the RAP1B gene (NM_001010942.2). These variants have not been described previously as germline variants, however functional studies in literature strongly suggest a clinical implication of these two activating hot spot positions. We hypothesize that pathogenic missense variants in the RAP1B gene cause congenital syndromic thrombocytopenia with a spectrum of associated malformations and dysmorphism, possibly through a gain of function mechanism.
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Affiliation(s)
| | - Chen Du
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | - Susanne Morlot
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | - Gunnar Schmidt
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | - Bernd Auber
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | - Beate Kaune
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | - Gudrun Göhring
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | - Tim Ripperger
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | | | - Winfried Hofmann
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
| | - Thomas Smol
- CHU Lille, Laboratoire de Génétique Médicale, Lille, France
| | - Emilie Ait-Yahya
- CHU Lille, Bioinformatics Unit, Molecular Biology Facility, Lille, France
| | - Anna Raimbault
- Hôpital Saint Louis, Service d'Hématologie Biologique, Paris, France
| | | | | | - Doris Steinemann
- Department of Human Genetics, Hannover Medical School, Hanover, Germany
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32
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Shpargel KB, Mangini CL, Xie G, Ge K, Magnuson T. The KMT2D Kabuki syndrome histone methylase controls neural crest cell differentiation and facial morphology. Development 2020; 147:dev.187997. [PMID: 32541010 DOI: 10.1242/dev.187997] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 06/02/2020] [Indexed: 12/13/2022]
Abstract
Kabuki syndrome (KS) is a congenital craniofacial disorder resulting from mutations in the KMT2D histone methylase (KS1) or the UTX histone demethylase (KS2). With small cohorts of KS2 patients, it is not clear whether differences exist in clinical manifestations relative to KS1. We mutated KMT2D in neural crest cells (NCCs) to study cellular and molecular functions in craniofacial development with respect to UTX. Similar to UTX, KMT2D NCC knockout mice demonstrate hypoplasia with reductions in frontonasal bone lengths. We have traced the onset of KMT2D and UTX mutant NCC frontal dysfunction to a stage of altered osteochondral progenitor differentiation. KMT2D NCC loss-of-function does exhibit unique phenotypes distinct from UTX mutation, including fully penetrant cleft palate, mandible hypoplasia and deficits in cranial base ossification. KMT2D mutant NCCs lead to defective secondary palatal shelf elevation with reduced expression of extracellular matrix components. KMT2D mutant chondrocytes in the cranial base fail to properly differentiate, leading to defective endochondral ossification. We conclude that KMT2D is required for appropriate cranial NCC differentiation and KMT2D-specific phenotypes may underlie differences between Kabuki syndrome subtypes.
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Affiliation(s)
- Karl B Shpargel
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599-7264, USA
| | - Cassidy L Mangini
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599-7264, USA
| | - Guojia Xie
- Laboratory of Endocrinology and Receptor Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Kai Ge
- Laboratory of Endocrinology and Receptor Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Terry Magnuson
- Department of Genetics and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599-7264, USA
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33
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Li A, Jia P, Mallik S, Fei R, Yoshioka H, Suzuki A, Iwata J, Zhao Z. Critical microRNAs and regulatory motifs in cleft palate identified by a conserved miRNA-TF-gene network approach in humans and mice. Brief Bioinform 2020; 21:1465-1478. [PMID: 31589286 PMCID: PMC7412957 DOI: 10.1093/bib/bbz082] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/03/2019] [Accepted: 06/12/2019] [Indexed: 12/12/2022] Open
Abstract
Cleft palate (CP) is the second most common congenital birth defect. The etiology of CP is complicated, with involvement of various genetic and environmental factors. To investigate the gene regulatory mechanisms, we designed a powerful regulatory analytical approach to identify the conserved regulatory networks in humans and mice, from which we identified critical microRNAs (miRNAs), target genes and regulatory motifs (miRNA-TF-gene) related to CP. Using our manually curated genes and miRNAs with evidence in CP in humans and mice, we constructed miRNA and transcription factor (TF) co-regulation networks for both humans and mice. A consensus regulatory loop (miR17/miR20a-FOXE1-PDGFRA) and eight miRNAs (miR-140, miR-17, miR-18a, miR-19a, miR-19b, miR-20a, miR-451a and miR-92a) were discovered in both humans and mice. The role of miR-140, which had the strongest association with CP, was investigated in both human and mouse palate cells. The overexpression of miR-140-5p, but not miR-140-3p, significantly inhibited cell proliferation. We further examined whether miR-140 overexpression could suppress the expression of its predicted target genes (BMP2, FGF9, PAX9 and PDGFRA). Our results indicated that miR-140-5p overexpression suppressed the expression of BMP2 and FGF9 in cultured human palate cells and Fgf9 and Pdgfra in cultured mouse palate cells. In summary, our conserved miRNA-TF-gene regulatory network approach is effective in detecting consensus miRNAs, motifs, and regulatory mechanisms in human and mouse CP.
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Affiliation(s)
- Aimin Li
- Shaanxi Key Laboratory for Network Computing and Security Technology, School of Computer Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Peilin Jia
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Saurav Mallik
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Rong Fei
- Shaanxi Key Laboratory for Network Computing and Security Technology, School of Computer Science and Engineering, Xi'an University of Technology, Xi'an, Shaanxi, 710048, China
| | - Hiroki Yoshioka
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
- Center for Craniofacial Research, University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - Akiko Suzuki
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
- Center for Craniofacial Research, University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - Junichi Iwata
- Department of Diagnostic and Biomedical Sciences, School of Dentistry, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
- Center for Craniofacial Research, University of Texas Health Science Center at Houston, Houston, TX 77054, USA
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030, USA
| | - Zhongming Zhao
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX 77030, USA
- Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, TN 37203, USA
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34
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Fahrner JA, Bjornsson HT. Mendelian disorders of the epigenetic machinery: postnatal malleability and therapeutic prospects. Hum Mol Genet 2020; 28:R254-R264. [PMID: 31595951 DOI: 10.1093/hmg/ddz174] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 07/10/2019] [Accepted: 07/11/2019] [Indexed: 12/14/2022] Open
Abstract
The epigenetic machinery in conjunction with the transcriptional machinery is responsible for maintaining genome-wide chromatin states and dynamically regulating gene expression. Mendelian disorders of the epigenetic machinery (MDEMs) are genetic disorders resulting from mutations in components of the epigenetic apparatus. Though individually rare, MDEMs have emerged as a collectively common etiology for intellectual disability (ID) and growth disruption. Studies in model organisms and humans have demonstrated dosage sensitivity of this gene group with haploinsufficiency as a predominant disease mechanism. The epigenetic machinery consists of three enzymatic components (writers, erasers and chromatin remodelers) as well as one non-enzymatic group (readers). A tally of the entire census of such factors revealed that although multiple enzymatic activities never coexist within a single component, individual enzymatic activities often coexist with a reader domain. This group of disorders disrupts both the chromatin and transcription states of target genes downstream of the given component but also DNA methylation on a global scale. Elucidation of these global epigenetic changes may inform our understanding of disease pathogenesis and have diagnostic utility. Moreover, many therapies targeting epigenetic marks already exist, and some have proven successful in treating cancer. This, along with the recent observation that neurological dysfunction in these disorders may in fact be treatable in postnatal life, suggests that the scientific community should prioritize this group as a potentially treatable cause of ID. Here we summarize the recent expansion and major characteristics of MDEMs, as well as the unique therapeutic prospects for this group of disorders.
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Affiliation(s)
- Jill A Fahrner
- McKusick-Nathans Institute of Genetic Medicine, 21205.,Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Hans T Bjornsson
- McKusick-Nathans Institute of Genetic Medicine, 21205.,Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.,Landspitali University Hospital, Reykjavik 101, Iceland.,Faculty of Medicine, University of Iceland, Reykjavik 101, Iceland
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35
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Ashokkumar D, Zhang Q, Much C, Bledau AS, Naumann R, Alexopoulou D, Dahl A, Goveas N, Fu J, Anastassiadis K, Stewart AF, Kranz A. MLL4 is required after implantation, whereas MLL3 becomes essential during late gestation. Development 2020; 147:dev186999. [PMID: 32439762 DOI: 10.1242/dev.186999] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 04/24/2020] [Indexed: 12/26/2022]
Abstract
Methylation of histone 3 lysine 4 (H3K4) is a major epigenetic system associated with gene expression. In mammals there are six H3K4 methyltransferases related to yeast Set1 and fly Trithorax, including two orthologs of fly Trithorax-related: MLL3 and MLL4. Exome sequencing has documented high frequencies of MLL3 and MLL4 mutations in many types of human cancer. Despite this emerging importance, the requirements of these paralogs in mammalian development have only been incompletely reported. Here, we examined the null phenotypes to establish that MLL3 is first required for lung maturation, whereas MLL4 is first required for migration of the anterior visceral endoderm that initiates gastrulation in the mouse. This collective cell migration is preceded by a columnar-to-squamous transition in visceral endoderm cells that depends on MLL4. Furthermore, Mll4 mutants display incompletely penetrant, sex-distorted, embryonic haploinsufficiency and adult heterozygous mutants show aspects of Kabuki syndrome, indicating that MLL4 action, unlike MLL3, is dosage dependent. The highly specific and discordant functions of these paralogs in mouse development argues against their action as general enhancer factors.
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Affiliation(s)
- Deepthi Ashokkumar
- Genomics, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
| | - Qinyu Zhang
- Genomics, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
| | - Christian Much
- Genomics, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
| | - Anita S Bledau
- Stem Cell Engineering, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
| | - Ronald Naumann
- Transgenic Core Facility, Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstr. 108, 01307 Dresden, Germany
| | - Dimitra Alexopoulou
- DRESDEN-concept Genome Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Fetscherstr. 105, 01307 Dresden, Germany
| | - Andreas Dahl
- DRESDEN-concept Genome Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Fetscherstr. 105, 01307 Dresden, Germany
| | - Neha Goveas
- Genomics, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
| | - Jun Fu
- Genomics, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
| | - Konstantinos Anastassiadis
- Stem Cell Engineering, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
| | - A Francis Stewart
- Genomics, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstr. 108, 01307 Dresden, Germany
| | - Andrea Kranz
- Genomics, Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, Tatzberg 47, 01307 Dresden, Germany
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36
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Ragamin A, Yigit G, Bousset K, Beleggia F, Verheijen FW, de Wit MY, Strom TM, Dörk T, Wollnik B, Mancini GMS. Human RAD50 deficiency: Confirmation of a distinctive phenotype. Am J Med Genet A 2020; 182:1378-1386. [PMID: 32212377 PMCID: PMC7318339 DOI: 10.1002/ajmg.a.61570] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 02/24/2020] [Accepted: 03/09/2020] [Indexed: 12/13/2022]
Abstract
DNA double-strand breaks (DSBs) are highly toxic DNA lesions that can lead to chromosomal instability, loss of genes and cancer. The MRE11/RAD50/NBN (MRN) complex is keystone involved in signaling processes inducing the repair of DSB by, for example, in activating pathways leading to homologous recombination repair and nonhomologous end joining. Additionally, the MRN complex also plays an important role in the maintenance of telomeres and can act as a stabilizer at replication forks. Mutations in NBN and MRE11 are associated with Nijmegen breakage syndrome (NBS) and ataxia telangiectasia (AT)-like disorder, respectively. So far, only one single patient with biallelic loss of function variants in RAD50 has been reported presenting with features classified as NBS-like disorder. Here, we report a long-term follow-up of an unrelated patient with facial dysmorphisms, microcephaly, skeletal features, and short stature who is homozygous for a novel variant in RAD50. We could show that this variant, c.2524G > A in exon 15 of the RAD50 gene, induces aberrant splicing of RAD50 mRNA mainly leading to premature protein truncation and thereby, most likely, to loss of RAD50 function. Using patient-derived primary fibroblasts, we could show abnormal radioresistant DNA synthesis confirming pathogenicity of the identified variant. Immunoblotting experiments showed strongly reduced protein levels of RAD50 in the patient-derived fibroblasts and provided evidence for a markedly reduced radiation-induced AT-mutated signaling. Comparison with the previously reported case and with patients presenting with NBS confirms that RAD50 mutations lead to a similar, but distinctive phenotype.
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Affiliation(s)
- Aviël Ragamin
- Department of Clinical GeneticsErasmus MC University Medical CenterRotterdamThe Netherlands
| | - Gökhan Yigit
- Institute of Human GeneticsUniversity Medical Center GöttingenGöttingenGermany
| | - Kristine Bousset
- Department of Gynecology and ObstetricsHannover Medical SchoolHannoverGermany
| | - Filippo Beleggia
- Clinic I of Internal MedicineUniversity Hospital CologneCologneGermany
| | - Frans W. Verheijen
- Department of Clinical GeneticsErasmus MC University Medical CenterRotterdamThe Netherlands
| | - Marie‐Claire Y. de Wit
- Department of Child NeurologySophia Children's Hospital, Erasmus MC University Medical CenterRotterdamNetherlands
- ENCORE Expertise Center for Neurodevelopmental DisordersRotterdamThe Netherlands
| | - Tim M. Strom
- Institute of Human GeneticsHelmholtz Zentrum MünchenNeuherbergGermany
- Institute of Human GeneticsTechnische Universität MünchenMunichGermany
| | - Thilo Dörk
- Department of Gynecology and ObstetricsHannover Medical SchoolHannoverGermany
| | - Bernd Wollnik
- Institute of Human GeneticsUniversity Medical Center GöttingenGöttingenGermany
- Cluster of Excellence "Multiscale Bioimaging: From Molecular Machines to Networks of Excitable Cells" (MBExC)University of GöttingenGöttingenGermany
| | - Grazia M. S. Mancini
- Department of Clinical GeneticsErasmus MC University Medical CenterRotterdamThe Netherlands
- ENCORE Expertise Center for Neurodevelopmental DisordersRotterdamThe Netherlands
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37
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Ji J, Wu L, Feng J, Mo W, Wu J, Yu Q, Li S, Zhang J, Dai W, Xu X, Mao Y, Xu S, Chen K, Li J, Guo C. Cafestol preconditioning attenuates apoptosis and autophagy during hepatic ischemia-reperfusion injury by inhibiting ERK/PPARγ pathway. Int Immunopharmacol 2020; 84:106529. [PMID: 32344356 DOI: 10.1016/j.intimp.2020.106529] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 04/01/2020] [Accepted: 04/18/2020] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The study was aimed to explore the hepatocellular protective functions of cafestol during hepatic ischemia-reperfusion injury and the possible mechanisms. METHODS Ninety male Balb/c mice were randomly divided into seven groups, including normal control group, L-cafestol(20mg/kg) group, H-cafestol(40mg/kg) group, sham group, IR group, L-cafestol(20mg/kg) + IR group, H-cafestol(40mg/kg) + IR group. Serum liver enzymes (ALT, AST), inflammation mediators, proteins associated with apoptosis and autophagy, indicators linked with ERK/PPARγ pathway, and liver histopathology were measured using ELISA, qRT-PCR, immunohistochemical staining, and western blotting at 2, 8, and 24 hours after reperfusion. RESULTS Our findings confirmed that cafestol preconditioning groups could reduce the levels of ALT and AST, alleviate liver pathological damage, suppress the release of inflammation mediators, inhibit the production of pro-apoptosis protein including caspase-3, caspase-9 and Bax, decrease the expression of autophagy-linked protein including Beclin-1 and LC3, increase anti-apoptosis protein Bcl-2, and restrain the activation of ERK and PPARγ. CONCLUSION Cafestol preconditioning could attenuate inflammatory response, apoptosis and autophagy on hepatic ischemia reperfusion injury by suppressing ERK/PPARγ pathway.
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Affiliation(s)
- Jie Ji
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Liwei Wu
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Jiao Feng
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Wenhui Mo
- Department of Gastroenterology, Shidong Hospital of Shanghai, Shanghai 200433, China
| | - Jianye Wu
- Department of Gastroenterology, Putuo People's Hospital, Tongji University School of Medicine, Shanghai 200060, China
| | - Qiang Yu
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Sainan Li
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Jie Zhang
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China; Shanghai Tenth Hospital, School of Clinical Medicine of Nanjing Medical University, Shanghai 200072, China
| | - Weiqi Dai
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China; Department of Gastroenterology, Putuo People's Hospital, Tongji University School of Medicine, Shanghai 200060, China; Department of Gastroenterology, Zhongshan Hospital of Fudan University, Shanghai 200032, China; Shanghai Institute of Liver Diseases, Zhongshan Hospital of Fudan University, Shanghai, 200032, China; Shanghai Tongren Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200336, China
| | - Xuanfu Xu
- Department of Gastroenterology, Shidong Hospital of Shanghai, Shanghai 200433, China
| | - Yuqing Mao
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Shizan Xu
- Department of Gastroenterology, Jinshan Hospital of Fudan University, Jinshan, Shanghai 201508, China
| | - Kan Chen
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China
| | - Jingjing Li
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China; Department of Gastroenterology, Putuo People's Hospital, Tongji University School of Medicine, Shanghai 200060, China.
| | - Chuanyong Guo
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China.
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38
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Criscitiello MF, Kraev I, Lange S. Post-Translational Protein Deimination Signatures in Serum and Serum-Extracellular Vesicles of Bos taurus Reveal Immune, Anti-Pathogenic, Anti-Viral, Metabolic and Cancer-Related Pathways for Deimination. Int J Mol Sci 2020; 21:E2861. [PMID: 32325910 PMCID: PMC7215346 DOI: 10.3390/ijms21082861] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 12/14/2022] Open
Abstract
The bovine immune system is known for its unusual traits relating to immunoglobulin and antiviral responses. Peptidylarginine deiminases (PADs) are phylogenetically conserved enzymes that cause post-translational deimination, contributing to protein moonlighting in health and disease. PADs also regulate extracellular vesicle (EV) release, forming a critical part of cellular communication. As PAD-mediated mechanisms in bovine immunology and physiology remain to be investigated, this study profiled deimination signatures in serum and serum-EVs in Bos taurus. Bos EVs were poly-dispersed in a 70-500 nm size range and showed differences in deiminated protein cargo, compared with whole sera. Key immune, metabolic and gene regulatory proteins were identified to be post-translationally deiminated with some overlapping hits in sera and EVs (e.g., immunoglobulins), while some were unique to either serum or serum-EVs (e.g., histones). Protein-protein interaction network analysis of deiminated proteins revealed KEGG pathways common for serum and serum-EVs, including complement and coagulation cascades, viral infection (enveloped viruses), viral myocarditis, bacterial and parasitic infections, autoimmune disease, immunodeficiency intestinal IgA production, B-cell receptor signalling, natural killer cell mediated cytotoxicity, platelet activation and hematopoiesis, alongside metabolic pathways including ferroptosis, vitamin digestion and absorption, cholesterol metabolism and mineral absorption. KEGG pathways specific to EVs related to HIF-1 signalling, oestrogen signalling and biosynthesis of amino acids. KEGG pathways specific for serum only, related to Epstein-Barr virus infection, transcription mis-regulation in cancer, bladder cancer, Rap1 signalling pathway, calcium signalling pathway and ECM-receptor interaction. This indicates differences in physiological and pathological pathways for deiminated proteins in serum-EVs, compared with serum. Our findings may shed light on pathways underlying a number of pathological and anti-pathogenic (viral, bacterial, parasitic) pathways, with putative translatable value to human pathologies, zoonotic diseases and development of therapies for infections, including anti-viral therapies.
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Affiliation(s)
- Michael F. Criscitiello
- Comparative Immunogenetics Laboratory, Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA;
- Department of Microbial Pathogenesis and Immunology, College of Medicine, Texas A&M Health Science Center, Texas A&M University, College Station, TX 77843, USA
| | - Igor Kraev
- Electron Microscopy Suite, Faculty of Science, Technology, Engineering and Mathematics, Open University, Milton Keynes MK7 6AA, UK;
| | - Sigrun Lange
- Tissue Architecture and Regeneration Research Group, School of Life Sciences, University of Westminster, London W1W 6XH, UK
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Wang Y, Li N, Su Z, Xu Y, Liu S, Chen Y, Li X, Shen Y, Hung C, Wang J, Wang X, Bodamer O. The phenotypic spectrum of Kabuki syndrome in patients of Chinese descent: A case series. Am J Med Genet A 2019; 182:640-651. [PMID: 31883305 DOI: 10.1002/ajmg.a.61467] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 10/11/2019] [Accepted: 12/16/2019] [Indexed: 12/21/2022]
Abstract
Kabuki syndrome (KS) is a rare disorder of transcriptional regulation with a complex phenotype that includes cranio-facial dysmorphism, intellectual disability, hypotonia, failure to thrive, short stature, and cardiac and renal anomalies. Heterozygous, de novo dominant mutations in either KMT2D or KDM6A underlie KS. Limited information is available about the phenotypic spectrum of KS in China. Fourteen Chinese patients with genetically confirmed KS were evaluated in addition to 11 Chinese patients who were identified from the medical literature. The clinical phenotype spectrum of these patients was compared to that of 449 patients with KS from non-Chinese ethnicities. Additionally, we explored the utility of a facial recognition software in recognizing KS. All 25 patients with KS carried de novo, likely pathogenic or pathogenic variants in either KMT2D or KDM6A. Eighteen patients were male, the age at diagnosis ranged from 2months to 11.6 years. The facial gestalt included arched and broad eyebrows (25/25; 100%), sparse lateral or notched eyebrows (18/18; 100%), short columella with a concave nasal tip (24/25; 96%) and large, prominent ears (24/24; 100%) which were more frequent in Chinese patients (p < .01). In contrast, microcephaly (2/25; 8%), cleft lip/palate (2/25; 8%), and cardiac defects (10/25; 40%) were less frequent in Chinese patients (not significant). The diagnosis of KS was correctly identified in 13 of 14 patients through facial recognition and clinical phenotyping, underscoring the utility of this approach. As expected, there is marked phenotypic overlap between Chinese and non-Chinese patients with KS, although subtle differences were identified.
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Affiliation(s)
- Yirou Wang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Niu Li
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhe Su
- Department of Endocrinology and Metabolism, Shenzhen Children's Hospital, Shenzhen, China
| | - Yufei Xu
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shijian Liu
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yao Chen
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xin Li
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yiping Shen
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Endocrinology and Metabolism, Shenzhen Children's Hospital, Shenzhen, China.,Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
| | - Christina Hung
- Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
| | - Jian Wang
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiumin Wang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Olaf Bodamer
- Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts.,Broad Institute of MIT and Harvard University, Cambridge, Massachusetts
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40
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Wang YR, Xu NX, Wang J, Wang XM. Kabuki syndrome: review of the clinical features, diagnosis and epigenetic mechanisms. World J Pediatr 2019; 15:528-535. [PMID: 31587141 DOI: 10.1007/s12519-019-00309-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 08/07/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND Kabuki syndrome (KS), is a infrequent inherited malformation syndrome caused by mutations in a H3 lysine 4 methylase (KMT2D) or an X-linked histone H3 lysine 27 demethylase (UTX/KDM6A). The characteristics in patients with KS have not yet been well recognized. DATA SOURCES We used databases including PubMed and Google Scholar to search for publications about the clinical features and the etiology of Kabuki syndrome. The most relevant articles to the scope of this review were chosen for analysis. RESULTS Clinical diagnosis of KS is challenging in initial period, because many clinical characteristics become apparent only in subsequent years. Recently, the genetic and functional interaction between KS-associated genes and their products have been elucidated. New clinical findings were reported including nervous system and intellectual performance, endocrine-related disorders and immune deficiency and autoimmune disease. Cancer risks of Kabuki syndrome was reviewed. Meanwhile, we discussed the Kabuki-like syndrome. Digital clinical genetic service, such as dysmorphology database can improve availability and provide high-quality diagnostic services. Given the significant clinical relevance of KS-associated genes and epigenetic modifications crosstalk, efforts in the research for new mechanisms are thus of maximum interest. CONCLUSIONS Kabuki syndrome has a strong clinical and biological heterogeneity. The main pathogenesis of Kabuki syndrome is the imbalance between switch-on and -off of the chromatin. The direction of drug research may be to regulate the normal opening of chromatin. Small molecule inhibitors of histone deacetylases maybe helpful in treatment of mental retardation and reduce cancer risk in KS.
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Affiliation(s)
- Yi-Rou Wang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Nai-Xin Xu
- Huaxi Medical College School of Sichuan University, Sichuan, China
| | - Jian Wang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China.,Department of Genetics, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Xiu-Min Wang
- Department of Endocrinology and Metabolism, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China. .,Department of Genetics, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China.
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41
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Tsai IC, Adams KA, Tzeng JA, Shennib O, Tan PL, Katsanis N. Genome-wide suppressor screen identifies USP35/USP38 as therapeutic candidates for ciliopathies. JCI Insight 2019; 4:130516. [PMID: 31723061 DOI: 10.1172/jci.insight.130516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 10/09/2019] [Indexed: 12/17/2022] Open
Abstract
The ciliopathies are a group of phenotypically overlapping disorders caused by structural or functional defects in the primary cilium. Although disruption of numerous signaling pathways and cellular trafficking events have been implicated in ciliary pathology, treatment options for affected individuals remain limited. Here, we performed a genome-wide RNAi (RNA interference) screen to identify genetic suppressors of BBS4, one of the genes mutated in Bardet-Biedl syndrome (BBS). We discovered 10 genes that, when silenced, ameliorate BBS4-dependent pathology. One of these encodes USP35, a negative regulator of the ubiquitin proteasome system, suggesting that inhibition of a deubiquitinase, and subsequent facilitation of the clearance of signaling components, might ameliorate BBS-relevant phenotypes. Testing of this hypothesis in transient and stable zebrafish genetic models showed this posit to be true; suppression or ablation of usp35 ameliorated hallmark ciliopathy defects including impaired convergent extension (CE), renal tubule convolution, and retinal degeneration with concomitant clearance of effectors such as β-catenin and rhodopsin. Together, our findings reinforce a direct link between proteasome-dependent degradation and ciliopathies and suggest that augmentation of this system might offer a rational path to novel therapeutic modalities.
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Affiliation(s)
- I-Chun Tsai
- Center for Human Disease Modeling, Duke University School of Medicine, Durham, North Carolina, USA
| | - Kevin A Adams
- Center for Human Disease Modeling, Duke University School of Medicine, Durham, North Carolina, USA
| | - Joyce A Tzeng
- Center for Human Disease Modeling, Duke University School of Medicine, Durham, North Carolina, USA
| | - Omar Shennib
- Center for Human Disease Modeling, Duke University School of Medicine, Durham, North Carolina, USA
| | - Perciliz L Tan
- Center for Human Disease Modeling, Duke University School of Medicine, Durham, North Carolina, USA.,Rescindo Therapeutics, Durham, North Carolina, USA
| | - Nicholas Katsanis
- Center for Human Disease Modeling, Duke University School of Medicine, Durham, North Carolina, USA.,Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA.,Departments of Pediatrics and Cellular and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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42
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Schmidt J, Wollnik B. Hallermann-Streiff syndrome: A missing molecular link for a highly recognizable syndrome. AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS 2019; 178:398-406. [PMID: 30580479 DOI: 10.1002/ajmg.c.31668] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/23/2018] [Accepted: 10/29/2018] [Indexed: 12/31/2022]
Abstract
The use of modern next-generation sequencing-based approaches for gene identification has tremendously improved our understanding of the molecular pathogenesis of the great majority of well-known syndromes, whereas only a few remain to be elucidated. Hallermann-Streiff syndrome is such a disorder for which the molecular basis is still unknown although it represents a highly recognizable phenotype. Clinically, patients with Hallermann-Streiff syndrome show typical craniofacial dysmorphism, eye malformations, a distinctive facial appearance, abnormalities of hair and skin, short stature, and, interestingly, they might also present with aspects of premature aging. The clinical diagnosis is mainly given by the very typical facial gestalt of patients. In this review, we (a) summarize the current knowledge on the phenotypic traits, focusing on described classic cases, (b) discuss the missing molecular link, and (c) present innovative future strategies for gene identification.
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Affiliation(s)
- Julia Schmidt
- Institute of Human Genetics, University Medical Center Göttingen, Göttingen, Germany
| | - Bernd Wollnik
- Institute of Human Genetics, University Medical Center Göttingen, Göttingen, Germany
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43
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Rosenberg CE, Daly T, Hung C, Hsueh I, Lindsley AW, Bodamer O. Prenatal and perinatal history in Kabuki Syndrome. Am J Med Genet A 2019; 182:85-92. [PMID: 31654559 DOI: 10.1002/ajmg.a.61387] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/04/2019] [Accepted: 09/30/2019] [Indexed: 12/18/2022]
Abstract
Kabuki syndrome (KS) is a disorder of epigenetic dysregulation due to heterozygous mutations in KMT2D or KDM6A, genes encoding a lysine-specific methyltransferase or demethylase, respectively. The phenotype is highly variable, including congenital cardiac and renal anomalies, developmental delay, hypotonia, failure to thrive, short stature, and immune dysfunction. All affected individuals have characteristic facial features. As KS natural history has not been fully delineated, limited information exists on its prenatal and perinatal history. Two tertiary centers collected retrospective data from individuals with KS (N = 49) using a questionnaire followed by review of medical records. Data from 49 individuals (age range: 7 months-33 years; 37% male; 36 with KMT2D mutations, 2 with KDM6A mutations, and 11 diagnosed clinically) were examined. Polyhydramnios affected 16 of 39 (41%) pregnancies. Abnormal quad screens in four out of nine (44%) pregnancies and reduced placental weights also complicated KS pregnancies. These data comprise the first large dataset on prenatal and perinatal history in individuals with confirmed (genetically or clinically) KS. Over a third of pregnancies were complicated by polyhydramnios, possibly secondary to abnormal craniofacial structures and functional impairment of swallowing. The differential diagnosis for polyhydramnios in the absence of intrauterine growth retardation should include KS.
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Affiliation(s)
- Chen E Rosenberg
- Division of Allergy & Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Tara Daly
- Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
| | - Christina Hung
- Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
| | - Irene Hsueh
- Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts
| | - Andrew W Lindsley
- Division of Allergy & Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Olaf Bodamer
- Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts.,Broad Metabolism Program, Broad Institute of Harvard University and MIT, Boston, Massachusetts
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44
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Kaiwar C, Kruisselbrink TM, Kudva YC, Klee EW, Pichurin P. Exome sequencing confirms diagnosis of kabuki syndrome in an-adult with hodgkin lymphoma and unusually severe multisystem phenotype. Clin Immunol 2019; 207:55-57. [DOI: 10.1016/j.clim.2018.09.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 08/19/2018] [Accepted: 09/28/2018] [Indexed: 12/13/2022]
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45
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Serrano MDLA, Demarest BL, Tone-Pah-Hote T, Tristani-Firouzi M, Yost HJ. Inhibition of Notch signaling rescues cardiovascular development in Kabuki Syndrome. PLoS Biol 2019; 17:e3000087. [PMID: 31479440 PMCID: PMC6743796 DOI: 10.1371/journal.pbio.3000087] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 09/13/2019] [Accepted: 08/08/2019] [Indexed: 01/05/2023] Open
Abstract
Kabuki Syndrome patients have a spectrum of congenital disorders, including congenital heart defects, the primary determinant of mortality. Seventy percent of Kabuki Syndrome patients have mutations in the histone methyl-transferase KMT2D. However, the underlying mechanisms that drive these congenital disorders are unknown. Here, we generated and characterized zebrafish kmt2d null mutants that recapitulate the cardinal phenotypic features of Kabuki Syndrome, including microcephaly, palate defects, abnormal ear development, and cardiac defects. The cardiac phenotype consists of a previously unknown vasculogenesis defect that affects endocardium patterning and, consequently, heart ventricle lumen formation. Additionally, zebrafish kmt2d null mutants have angiogenesis defects depicted by abnormal aortic arch development, hyperactive ectopic blood vessel sprouting, and aberrant patterning of the brain vascular plexus. We demonstrate that zebrafish kmt2d null mutants have robust Notch signaling hyperactivation in endocardial and endothelial cells, including increased protein levels of the Notch transcription factor Rbpj. Our zebrafish Kabuki Syndrome model reveals a regulatory link between the Notch pathway and Kmt2d during endothelium and endocardium patterning and shows that pharmacological inhibition of Notch signaling rebalances Rbpj protein levels and rescues the cardiovascular phenotype by enhancing endothelial and endocardial cell proliferation and stabilizing endocardial patterning. Taken together, these findings demonstrate that Kmt2d regulates vasculogenesis and angiogenesis, provide evidence for interactions between Kmt2d and Notch signaling in Kabuki Syndrome, and suggest future directions for clinical research.
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Affiliation(s)
- Maria de los Angeles Serrano
- Molecular Medicine Program—Neurobiology and Anatomy Department, University of Utah, Salt Lake City, Utah, United States of America
| | - Bradley L. Demarest
- Molecular Medicine Program—Neurobiology and Anatomy Department, University of Utah, Salt Lake City, Utah, United States of America
| | | | - Martin Tristani-Firouzi
- Nora Eccles Harrison Cardiovascular Research and Training Institute and Division of Pediatric Cardiology, University of Utah, Salt Lake City, Utah, United States of America
| | - H. Joseph Yost
- Molecular Medicine Program—Neurobiology and Anatomy Department, University of Utah, Salt Lake City, Utah, United States of America
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46
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Niihori T, Nagai K, Fujita A, Ohashi H, Okamoto N, Okada S, Harada A, Kihara H, Arbogast T, Funayama R, Shirota M, Nakayama K, Abe T, Inoue SI, Tsai IC, Matsumoto N, Davis EE, Katsanis N, Aoki Y. Germline-Activating RRAS2 Mutations Cause Noonan Syndrome. Am J Hum Genet 2019; 104:1233-1240. [PMID: 31130285 PMCID: PMC6562005 DOI: 10.1016/j.ajhg.2019.04.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 04/18/2019] [Indexed: 02/05/2023] Open
Abstract
Noonan syndrome (NS) is characterized by distinctive craniofacial appearance, short stature, and congenital heart disease. Approximately 80% of individuals with NS harbor mutations in genes whose products are involved in the RAS/mitogen-activating protein kinase (MAPK) pathway. However, the underlying genetic causes in nearly 20% of individuals with NS phenotype remain unexplained. Here, we report four de novo RRAS2 variants in three individuals with NS. RRAS2 is a member of the RAS subfamily and is ubiquitously expressed. Three variants, c.70_78dup (p.Gly24_Gly26dup), c.216A>T (p.Gln72His), and c.215A>T (p.Gln72Leu), have been found in cancers; our functional analyses showed that these three changes induced elevated association of RAF1 and that they activated ERK1/2 and ELK1. Notably, prominent activation of ERK1/2 and ELK1 by p.Gln72Leu associates with the severe phenotype of the individual harboring this change. To examine variant pathogenicity in vivo, we generated zebrafish models. Larvae overexpressing c.70_78dup (p.Gly24_Gly26dup) or c.216A>T (p.Gln72His) variants, but not wild-type RRAS2 RNAs, showed craniofacial defects and macrocephaly. The same dose injection of mRNA encoding c.215A>T (p.Gln72Leu) caused severe developmental impairments and low dose overexpression of this variant induced craniofacial defects. In contrast, the RRAS2 c.224T>G (p.Phe75Cys) change, located on the same allele with p.Gln72His in an individual with NS, resulted in no aberrant in vitro or in vivo phenotypes by itself. Together, our findings suggest that activating RRAS2 mutations can cause NS and expand the involvement of RRAS2 proto-oncogene to rare germline disorders.
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Affiliation(s)
- Tetsuya Niihori
- Department of Medical Genetics, Tohoku University School of Medicine, Sendai 980-8574, Japan; Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27701, USA.
| | - Koki Nagai
- Department of Medical Genetics, Tohoku University School of Medicine, Sendai 980-8574, Japan
| | - Atsushi Fujita
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
| | - Hirofumi Ohashi
- Division of Medical Genetics, Saitama Children's Medical Center, Saitama 330-8777, Japan
| | - Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Women's and Children's Hospital, Osaka 594-1101, Japan
| | - Satoshi Okada
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical & Health Sciences, Hiroshima 734-8551, Japan
| | - Atsuko Harada
- Department of Pediatric Neurosurgery, Takatsuki General Hospital, Osaka 569-1192, Japan
| | - Hirotaka Kihara
- Department of Pediatrics, Onomichi General Hospital, Hiroshima 722-8508, Japan
| | - Thomas Arbogast
- Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27701, USA
| | - Ryo Funayama
- Department of Cell Proliferation, United Center for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Matsuyuki Shirota
- Division of Interdisciplinary Medical Sciences, United Center for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Keiko Nakayama
- Department of Cell Proliferation, United Center for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Taiki Abe
- Department of Medical Genetics, Tohoku University School of Medicine, Sendai 980-8574, Japan
| | - Shin-Ichi Inoue
- Department of Medical Genetics, Tohoku University School of Medicine, Sendai 980-8574, Japan
| | - I-Chun Tsai
- Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27701, USA
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
| | - Erica E Davis
- Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27701, USA
| | - Nicholas Katsanis
- Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27701, USA.
| | - Yoko Aoki
- Department of Medical Genetics, Tohoku University School of Medicine, Sendai 980-8574, Japan
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47
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Alharatani R, Griffin JN, Liu KJ. Expression of the guanine nucleotide exchange factor, RAPGEF5, during mouse and human embryogenesis. Gene Expr Patterns 2019; 34:119057. [PMID: 31163262 DOI: 10.1016/j.gep.2019.119057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 04/25/2019] [Accepted: 05/31/2019] [Indexed: 01/19/2023]
Abstract
Rap GTPases mediate fundamental cellular processes, including cell adhesion, migration and intracellular signal transduction. The subcellular activity of these GTPases is regulated by dedicated activators (guanine nucleotide exchange factors, GEFs) and deactivators (GTPase-activating proteins, GAPs). RAPGEF5 is a potent activator of Rap proteins and mutations in RAPGEF5 have been linked to both neurological disorders and congenital heart disease. In the frog model, Xenopus tropicalis, Rapgef5 is a critical regulator of the canonical Wnt signalling pathway and is required for normal gastrulation and correct establishment of the left-right body axis. However, requirements for RAPGEF5 in other developmental contexts, and in mammalian embryogenesis in particular, remain undefined. Here, we describe RAPGEF5 mRNA expression patterns during mouse (E9.5 - E16.5) and human (Carnegie stage 21) development, as an initial step towards better understanding its developmental functions.
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Affiliation(s)
- Reham Alharatani
- The Centre for Craniofacial and Regenerative Biology, Faculty of Dental, Oral and Craniofacial Sciences, King's College London, London, SE1 9RT, UK
| | - John N Griffin
- The Centre for Craniofacial and Regenerative Biology, Faculty of Dental, Oral and Craniofacial Sciences, King's College London, London, SE1 9RT, UK.
| | - Karen J Liu
- The Centre for Craniofacial and Regenerative Biology, Faculty of Dental, Oral and Craniofacial Sciences, King's College London, London, SE1 9RT, UK.
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48
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Abstract
Deviations from the precisely coordinated programme of human head development can lead to craniofacial and orofacial malformations often including a variety of dental abnormalities too. Although the aetiology is still unknown in many cases, during the last decades different intracellular signalling pathways have been genetically linked to specific disorders. Among these pathways, the RAS/extracellular signal-regulated kinase (ERK) signalling cascade is the focus of this review since it encompasses a large group of genes that when mutated cause some of the most common and severe developmental anomalies in humans. We present the components of the RAS/ERK pathway implicated in craniofacial and orodental disorders through a series of human and animal studies. We attempt to unravel the specific molecular targets downstream of ERK that act on particular cell types and regulate key steps in the associated developmental processes. Finally we point to ambiguities in our current knowledge that need to be clarified before RAS/ERK-targeting therapeutic approaches can be implemented.
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49
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de Billy E, Strocchio L, Cacchione A, Agolini E, Gnazzo M, Novelli A, De Vito R, Capolino R, Digilio MC, Caruso R, Mastronuzzi A, Locatelli F. Burkitt lymphoma in a patient with Kabuki syndrome carrying a novel KMT2D mutation. Am J Med Genet A 2018; 179:113-117. [PMID: 30569626 DOI: 10.1002/ajmg.a.60674] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 10/09/2018] [Accepted: 10/16/2018] [Indexed: 12/12/2022]
Abstract
Kabuki syndrome (KS) is an extremely rare genetic disorder, mainly caused by germline mutations at specific epigenetic modifier genes, including KMT2D. Because the tumor suppressor gene KMT2D is also frequently altered in many cancer types, it has been suggested that KS may predispose to the development of cancer. However, KS being a rare disorder, few data are available on the incidence of cancer in KS patients. Here, we report the case of a 5-year-old boy affected by KS who developed Burkitt lymphoma (BL). Genetic analysis revealed the presence of a novel heterozygous mutation in the splice site of the intron 4 of KMT2D gene in both peripheral blood-extracted DNA and tumour cells. In addition, the tumour sample of the patient was positive for the classical somatic chromosomal translocation t(8;14) involving the c-MYC gene frequently identified in BL. We propose that the mutated KMT2D gene contributes to the development of both KS and BL observed in our patient and we suggest that strict surveillance must be performed in KS patients.
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Affiliation(s)
- Emmanuel de Billy
- Department of Pediatric Hematology/Oncology and Cellular and Gene Therapy, Bambino Gesù Children's Hospital, Rome, Italy
| | - Luisa Strocchio
- Department of Pediatric Hematology/Oncology and Cellular and Gene Therapy, Bambino Gesù Children's Hospital, Rome, Italy
| | - Antonella Cacchione
- Department of Pediatric Hematology/Oncology and Cellular and Gene Therapy, Bambino Gesù Children's Hospital, Rome, Italy
| | - Emanuele Agolini
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Maria Gnazzo
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Antonio Novelli
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Rita De Vito
- Pathology Unit, Department of Pathology and Molecular Histopathology, Bambino Gesù Children's Hospital, Rome, Italy
| | - Rossella Capolino
- Medical Genetics Unit, Bambino Gesù Children's Hospital, Rome, Italy
| | | | - Roberta Caruso
- Department of Pediatric Hematology/Oncology and Cellular and Gene Therapy, Bambino Gesù Children's Hospital, Rome, Italy
| | - Angela Mastronuzzi
- Department of Pediatric Hematology/Oncology and Cellular and Gene Therapy, Bambino Gesù Children's Hospital, Rome, Italy
| | - Franco Locatelli
- Department of Pediatric Hematology/Oncology and Cellular and Gene Therapy, Bambino Gesù Children's Hospital, Rome, Italy.,Department of Pediatric Sciences, University of Pavia, Pavia, Italy
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Rasmussen NR, Dickinson DJ, Reiner DJ. Ras-Dependent Cell Fate Decisions Are Reinforced by the RAP-1 Small GTPase in Caenorhabditiselegans. Genetics 2018; 210:1339-1354. [PMID: 30257933 PMCID: PMC6283165 DOI: 10.1534/genetics.118.301601] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 09/15/2018] [Indexed: 12/15/2022] Open
Abstract
The notoriety of the small GTPase Ras as the most mutated oncoprotein has led to a well-characterized signaling network largely conserved across metazoans. Yet the role of its close relative Rap1 (Ras Proximal), which shares 100% identity between their core effector binding sequences, remains unclear. A long-standing controversy in the field is whether Rap1 also functions to activate the canonical Ras effector, the S/T kinase Raf. We used the developmentally simpler Caenorhabditis elegans, which lacks the extensive paralog redundancy of vertebrates, to examine the role of RAP-1 in two distinct LET-60/Ras-dependent cell fate patterning events: induction of 1° vulval precursor cell (VPC) fate and of the excretory duct cell. Fluorescence-tagged endogenous RAP-1 is localized to plasma membranes and is expressed ubiquitously, with even expression levels across the VPCs. RAP-1 and its activating GEF PXF-1 function cell autonomously and are necessary for maximal induction of 1° VPCs. Critically, mutationally activated endogenous RAP-1 is sufficient both to induce ectopic 1°s and duplicate excretory duct cells. Like endogenous RAP-1, before induction GFP expression from the pxf-1 promoter is uniform across VPCs. However, unlike endogenous RAP-1, after induction GFP expression is increased in presumptive 1°s and decreased in presumptive 2°s. We conclude that RAP-1 is a positive regulator that promotes Ras-dependent inductive fate decisions. We hypothesize that PXF-1 activation of RAP-1 serves as a minor parallel input into the major LET-60/Ras signal through LIN-45/Raf.
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Affiliation(s)
- Neal R Rasmussen
- Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, Texas 77030
| | - Daniel J Dickinson
- Department of Molecular Biosciences, University of Texas, Austin, Texas 78705
| | - David J Reiner
- Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, Texas 77030
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