1
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Boonsawat P, Asadollahi R, Niedrist D, Steindl K, Begemann A, Joset P, Bhoj EJ, Li D, Zackai E, Vetro A, Barba C, Guerrini R, Whalen S, Keren B, Khan A, Jing D, Palomares Bralo M, Rikeros Orozco E, Hao Q, Schlott Kristiansen B, Zheng B, Donnelly D, Clowes V, Zweier M, Papik M, Siegel G, Sabatino V, Mocera M, Horn AHC, Sticht H, Rauch A. Deleterious ZNRF3 germline variants cause neurodevelopmental disorders with mirror brain phenotypes via domain-specific effects on Wnt/β-catenin signaling. Am J Hum Genet 2024; 111:1994-2011. [PMID: 39168120 PMCID: PMC11393693 DOI: 10.1016/j.ajhg.2024.07.016] [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: 04/29/2024] [Revised: 07/24/2024] [Accepted: 07/24/2024] [Indexed: 08/23/2024] Open
Abstract
Zinc and RING finger 3 (ZNRF3) is a negative-feedback regulator of Wnt/β-catenin signaling, which plays an important role in human brain development. Although somatically frequently mutated in cancer, germline variants in ZNRF3 have not been established as causative for neurodevelopmental disorders (NDDs). We identified 12 individuals with ZNRF3 variants and various phenotypes via GeneMatcher/Decipher and evaluated genotype-phenotype correlation. We performed structural modeling and representative deleterious and control variants were assessed using in vitro transcriptional reporter assays with and without Wnt-ligand Wnt3a and/or Wnt-potentiator R-spondin (RSPO). Eight individuals harbored de novo missense variants and presented with NDD. We found missense variants associated with macrocephalic NDD to cluster in the RING ligase domain. Structural modeling predicted disruption of the ubiquitin ligase function likely compromising Wnt receptor turnover. Accordingly, the functional assays showed enhanced Wnt/β-catenin signaling for these variants in a dominant negative manner. Contrarily, an individual with microcephalic NDD harbored a missense variant in the RSPO-binding domain predicted to disrupt binding affinity to RSPO and showed attenuated Wnt/β-catenin signaling in the same assays. Additionally, four individuals harbored de novo truncating or de novo or inherited large in-frame deletion variants with non-NDD phenotypes, including heart, adrenal, or nephrotic problems. In contrast to NDD-associated missense variants, the effects on Wnt/β-catenin signaling were comparable between the truncating variant and the empty vector and between benign variants and the wild type. In summary, we provide evidence for mirror brain size phenotypes caused by distinct pathomechanisms in Wnt/β-catenin signaling through protein domain-specific deleterious ZNRF3 germline missense variants.
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Affiliation(s)
| | - Reza Asadollahi
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland; Faculty of Engineering and Science, University of Greenwich London, Medway Campus, Chatham Maritime ME4 4TB, UK
| | - Dunja Niedrist
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Katharina Steindl
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Anaïs Begemann
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Pascal Joset
- Medical Genetics, University Hospital Basel, Basel, Switzerland
| | - Elizabeth J Bhoj
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Dong Li
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Elaine Zackai
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Annalisa Vetro
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Carmen Barba
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy; University of Florence, Florence, Italy
| | - Renzo Guerrini
- Neuroscience Department, Meyer Children's Hospital IRCCS, Florence, Italy
| | - Sandra Whalen
- Unité Fonctionnelle de Génétique Odellin, Hôpital Armand Trousseau, Paris, France
| | - Boris Keren
- Département de Génétique, Hôpital de la Pitié-Salpêtrière, Paris, France
| | - Amjad Khan
- Faculty of Science, Department of Biological Science (Zoology), University of Lakki Marwat, Khyber Pakhtunkhwa 28420, Pakistan
| | - Duan Jing
- Shenzhen Children's Hospital, Shenzhen, Guangdong, China
| | - María Palomares Bralo
- Instituto de Genética Médica y Molecular (INGEMM), Unidad de Trastornos Del Neurodesarrollo, Hospital Universitario La Paz, Madrid, Spain
| | - Emi Rikeros Orozco
- Instituto de Genética Médica y Molecular (INGEMM), Unidad de Trastornos Del Neurodesarrollo, Hospital Universitario La Paz, Madrid, Spain
| | - Qin Hao
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | | | - Bixia Zheng
- Nanjing Key Laboratory of Pediatrics Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Deirdre Donnelly
- Northern Ireland Regional Genetics Centre, Belfast Health & Social Care Trust, Belfast, Northern Ireland
| | - Virginia Clowes
- Thames Regional Genetics Service, North West University Healthcare NHS Trust, London, UK
| | - Markus Zweier
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Michael Papik
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Gabriele Siegel
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Valeria Sabatino
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Martina Mocera
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Anselm H C Horn
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland; Institute of Biochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Heinrich Sticht
- Institute of Biochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Anita Rauch
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland; Pediatric University Hospital Zurich, Zurich, Switzerland.
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2
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Ma Q, Chen G, Li Y, Guo Z, Zhang X. The molecular genetics of PI3K/PTEN/AKT/mTOR pathway in the malformations of cortical development. Genes Dis 2024; 11:101021. [PMID: 39006182 PMCID: PMC11245990 DOI: 10.1016/j.gendis.2023.04.041] [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: 12/07/2022] [Revised: 04/07/2023] [Accepted: 04/30/2023] [Indexed: 07/16/2024] Open
Abstract
Malformations of cortical development (MCD) are a group of developmental disorders characterized by abnormal cortical structures caused by genetic or harmful environmental factors. Many kinds of MCD are caused by genetic variation. MCD is the common cause of intellectual disability and intractable epilepsy. With rapid advances in imaging and sequencing technologies, the diagnostic rate of MCD has been increasing, and many potential genes causing MCD have been successively identified. However, the high genetic heterogeneity of MCD makes it challenging to understand the molecular pathogenesis of MCD and to identify effective targeted drugs. Thus, in this review, we outline important events of cortical development. Then we illustrate the progress of molecular genetic studies about MCD focusing on the PI3K/PTEN/AKT/mTOR pathway. Finally, we briefly discuss the diagnostic methods, disease models, and therapeutic strategies for MCD. The information will facilitate further research on MCD. Understanding the role of the PI3K/PTEN/AKT/mTOR pathway in MCD could lead to a novel strategy for treating MCD-related diseases.
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Affiliation(s)
- Qing Ma
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Harbin Medical University, Harbin, Heilongjiang 150000, China
| | - Guang Chen
- Department of Urology, The Fourth Hospital of Harbin Medical University, Harbin, Heilongjiang 150000, China
| | - Ying Li
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Harbin Medical University, Harbin, Heilongjiang 150000, China
- Department of Child and Adolescent Health, School of Public Health, Harbin Medical University, Harbin, Heilongjiang 150000, China
| | - Zhenming Guo
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai 200120, China
| | - Xue Zhang
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Harbin Medical University, Harbin, Heilongjiang 150000, China
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3
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Gilbert T, Gorlt C, Barbier M, Duployer B, Plozza M, Dufrancais O, Martet LE, Dalbard E, Segot L, Tenailleau C, Haren L, Vérollet C, Bierkamp C, Merdes A. Loss of ninein interferes with osteoclast formation and causes premature ossification. eLife 2024; 13:e93457. [PMID: 38836552 PMCID: PMC11175614 DOI: 10.7554/elife.93457] [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: 10/11/2023] [Accepted: 06/04/2024] [Indexed: 06/06/2024] Open
Abstract
Ninein is a centrosome protein that has been implicated in microtubule anchorage and centrosome cohesion. Mutations in the human NINEIN gene have been linked to Seckel syndrome and to a rare form of skeletal dysplasia. However, the role of ninein in skeletal development remains unknown. Here, we describe a ninein knockout mouse with advanced endochondral ossification during embryonic development. Although the long bones maintain a regular size, the absence of ninein delays the formation of the bone marrow cavity in the prenatal tibia. Likewise, intramembranous ossification in the skull is more developed, leading to a premature closure of the interfrontal suture. We demonstrate that ninein is strongly expressed in osteoclasts of control mice, and that its absence reduces the fusion of precursor cells into syncytial osteoclasts, whereas the number of osteoblasts remains unaffected. As a consequence, ninein-deficient osteoclasts have a reduced capacity to resorb bone. At the cellular level, the absence of ninein interferes with centrosomal microtubule organization, reduces centrosome cohesion, and provokes the loss of centrosome clustering in multinucleated mature osteoclasts. We propose that centrosomal ninein is important for osteoclast fusion, to enable a functional balance between bone-forming osteoblasts and bone-resorbing osteoclasts during skeletal development.
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Affiliation(s)
- Thierry Gilbert
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
| | - Camille Gorlt
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
- Institut de Pharmacologie et de Biologie Structurale, UMR5089, CNRS & Université Paul SabatierToulouseFrance
| | - Merlin Barbier
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
| | | | - Marianna Plozza
- Institut de Pharmacologie et de Biologie Structurale, UMR5089, CNRS & Université Paul SabatierToulouseFrance
| | - Ophélie Dufrancais
- Institut de Pharmacologie et de Biologie Structurale, UMR5089, CNRS & Université Paul SabatierToulouseFrance
| | - Laure-Elene Martet
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
| | - Elisa Dalbard
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
| | - Loelia Segot
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
| | | | - Laurence Haren
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
| | - Christel Vérollet
- Institut de Pharmacologie et de Biologie Structurale, UMR5089, CNRS & Université Paul SabatierToulouseFrance
- International Research Project CNRS “MAC-TB/HIV”ToulouseFrance
| | - Christiane Bierkamp
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
| | - Andreas Merdes
- Molecular, Cellular and Developmental Biology, Centre de Biologie Intégrative, UMR5077, CNRS & Université Paul SabatierToulouseFrance
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4
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Knol MJ, Poot RA, Evans TE, Satizabal CL, Mishra A, Sargurupremraj M, van der Auwera S, Duperron MG, Jian X, Hostettler IC, van Dam-Nolen DHK, Lamballais S, Pawlak MA, Lewis CE, Carrion-Castillo A, van Erp TGM, Reinbold CS, Shin J, Scholz M, Håberg AK, Kämpe A, Li GHY, Avinun R, Atkins JR, Hsu FC, Amod AR, Lam M, Tsuchida A, Teunissen MWA, Aygün N, Patel Y, Liang D, Beiser AS, Beyer F, Bis JC, Bos D, Bryan RN, Bülow R, Caspers S, Catheline G, Cecil CAM, Dalvie S, Dartigues JF, DeCarli C, Enlund-Cerullo M, Ford JM, Franke B, Freedman BI, Friedrich N, Green MJ, Haworth S, Helmer C, Hoffmann P, Homuth G, Ikram MK, Jack CR, Jahanshad N, Jockwitz C, Kamatani Y, Knodt AR, Li S, Lim K, Longstreth WT, Macciardi F, Mäkitie O, Mazoyer B, Medland SE, Miyamoto S, Moebus S, Mosley TH, Muetzel R, Mühleisen TW, Nagata M, Nakahara S, Palmer ND, Pausova Z, Preda A, Quidé Y, Reay WR, Roshchupkin GV, Schmidt R, Schreiner PJ, Setoh K, Shapland CY, Sidney S, St Pourcain B, Stein JL, Tabara Y, Teumer A, Uhlmann A, van der Lugt A, Vernooij MW, Werring DJ, Windham BG, Witte AV, Wittfeld K, Yang Q, Yoshida K, Brunner HG, Le Grand Q, Sim K, Stein DJ, Bowden DW, Cairns MJ, Hariri AR, Cheung CL, Andersson S, Villringer A, Paus T, Cichon S, Calhoun VD, Crivello F, Launer LJ, White T, Koudstaal PJ, Houlden H, Fornage M, Matsuda F, Grabe HJ, Ikram MA, Debette S, Thompson PM, Seshadri S, Adams HHH. Genetic variants for head size share genes and pathways with cancer. Cell Rep Med 2024; 5:101529. [PMID: 38703765 PMCID: PMC11148644 DOI: 10.1016/j.xcrm.2024.101529] [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: 11/30/2021] [Revised: 09/18/2023] [Accepted: 04/04/2024] [Indexed: 05/06/2024]
Abstract
The size of the human head is highly heritable, but genetic drivers of its variation within the general population remain unmapped. We perform a genome-wide association study on head size (N = 80,890) and identify 67 genetic loci, of which 50 are novel. Neuroimaging studies show that 17 variants affect specific brain areas, but most have widespread effects. Gene set enrichment is observed for various cancers and the p53, Wnt, and ErbB signaling pathways. Genes harboring lead variants are enriched for macrocephaly syndrome genes (37-fold) and high-fidelity cancer genes (9-fold), which is not seen for human height variants. Head size variants are also near genes preferentially expressed in intermediate progenitor cells, neural cells linked to evolutionary brain expansion. Our results indicate that genes regulating early brain and cranial growth incline to neoplasia later in life, irrespective of height. This warrants investigation of clinical implications of the link between head size and cancer.
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Affiliation(s)
- Maria J Knol
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Raymond A Poot
- Department of Cell Biology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Tavia E Evans
- Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Claudia L Satizabal
- Glenn Biggs Institute for Alzheimer's & Neurodegenerative Diseases, UT Health San Antonio, San Antonio, TX, USA; The Framingham Heart Study, Framingham, MA, USA; Department of Neurology, Boston University School of Medicine, Boston, MA, USA
| | - Aniket Mishra
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, team VINTAGE, UMR 1219, Bordeaux, France
| | - Muralidharan Sargurupremraj
- Glenn Biggs Institute for Alzheimer's & Neurodegenerative Diseases, UT Health San Antonio, San Antonio, TX, USA
| | - Sandra van der Auwera
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany; German Centre of Neurodegenerative Diseases (DZNE), Site Rostock/Greifswald, Greifswald, Germany
| | - Marie-Gabrielle Duperron
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, team VINTAGE, UMR 1219, Bordeaux, France
| | - Xueqiu Jian
- Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Isabel C Hostettler
- Stroke Research Centre, University College London, Institute of Neurology, London, UK; Department of Neurosurgery, Klinikum rechts der Isar, University of Munich, Munich, Germany; Neurosurgical Department, Cantonal Hospital St. Gallen, St. Gallen, Switzerland
| | - Dianne H K van Dam-Nolen
- Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Sander Lamballais
- Department of Clinical Genetics, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Mikolaj A Pawlak
- Department of Neurology, Poznań University of Medical Sciences, Poznań, Poland; Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Cora E Lewis
- Department of Epidemiology, School of Public Health, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Amaia Carrion-Castillo
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands
| | - Theo G M van Erp
- Clinical Translational Neuroscience Laboratory, Department of Psychiatry and Human Behavior, University of California, Irvine, Irvine, CA, USA; Center for the Neurobiology of Learning and Memory, University of California, Irvine, Irvine, CA, USA
| | - Céline S Reinbold
- Department of Biomedicine, University of Basel, Basel, Switzerland; Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland; Institute of Computational Life Sciences, Zurich University of Applied Sciences, Wädenswil, Switzerland
| | - Jean Shin
- The Hospital for Sick Children, University of Toronto, Toronto, Canada; Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, Canada
| | - Markus Scholz
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany; LIFE Research Center for Civilization Disease, Leipzig, Germany
| | - Asta K Håberg
- Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; Department of Radiology and Nuclear Medicine, St. Olavs University Hospital, Trondheim, Norway
| | - Anders Kämpe
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden
| | - Gloria H Y Li
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Reut Avinun
- Laboratory of NeuroGenetics, Department of Psychology & Neuroscience, Duke University, Durham, NC, USA
| | - Joshua R Atkins
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia; Centre for Brain and Mental Health Research, Hunter Medical Research Institute, Newcastle, NSW, Australia
| | - Fang-Chi Hsu
- Department of Biostatistics and Data Science, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Alyssa R Amod
- Department of Child and Adolescent Psychiatry, TU Dresden, Dresden, Germany
| | - Max Lam
- North Region, Institute of Mental Health, Singapore, Singapore; Population and Global Health, LKC Medicine, Nanyang Technological University, Singapore, Singapore
| | - Ami Tsuchida
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, team VINTAGE, UMR 1219, Bordeaux, France; Groupe d'imagerie neurofonctionnelle, Institut des Maladies Neurodégénératives, UMR 5293, CNRS, CEA, Université de Bordeaux, Bordeaux, France
| | - Mariël W A Teunissen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Neurology, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Nil Aygün
- Department of Genetics UNC Neuroscience Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Yash Patel
- Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - Dan Liang
- Department of Genetics UNC Neuroscience Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Alexa S Beiser
- The Framingham Heart Study, Framingham, MA, USA; Department of Neurology, Boston University School of Medicine, Boston, MA, USA; Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Frauke Beyer
- Department of Neurology, Max Planck Institute for Cognitive and Brain Sciences, Leipzig, Germany; Collaborative Research Center 1052 Obesity Mechanisms, Faculty of Medicine, University of Leipzig, Leipzig, Germany; Day Clinic for Cognitive Neurology, University Hospital Leipzig, Leipzig, Germany
| | - Joshua C Bis
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Daniel Bos
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - R Nick Bryan
- Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA
| | - Robin Bülow
- Institute of Diagnostic Radiology and Neuroradiology, University Medicine Greifswald, Greifswald, Germany
| | - Svenja Caspers
- Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Jülich, Germany; Institute for Anatomy I, Medical Faculty & University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Gwenaëlle Catheline
- University of Bordeaux, CNRS, INCIA, UMR 5287, team NeuroImagerie et Cognition Humaine, Bordeaux, France; EPHE-PSL University, Bordeaux, France
| | - Charlotte A M Cecil
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Child and Adolescent Psychiatry, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Shareefa Dalvie
- Department of Child and Adolescent Psychiatry, TU Dresden, Dresden, Germany
| | - Jean-François Dartigues
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, team SEPIA, UMR 1219, Bordeaux, France
| | - Charles DeCarli
- Department of Neurology and Center for Neuroscience, University of California at Davis, Sacramento, CA, USA
| | - Maria Enlund-Cerullo
- Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Folkhälsan Research Center, Helsinki, Finland
| | - Judith M Ford
- San Francisco Veterans Administration Medical Center, San Francisco, CA, USA; University of California, San Francisco, San Francisco, CA, USA
| | - Barbara Franke
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Psychiatry, Radboud University Medical Center, Nijmegen, the Netherlands; Donders Institute for Brain, Cognition, and Behaviour, Radboud University, Nijmegen, the Netherlands
| | - Barry I Freedman
- Department of Internal Medicine, Section on Nephrology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Nele Friedrich
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Melissa J Green
- School of Clinical Medicine, University of New South Wales, Sydney, NSW, Australia; Neuroscience Research Australia, Sydney, NSW, Australia
| | - Simon Haworth
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Catherine Helmer
- University of Bordeaux, Inserm, Bordeaux Population Health Research Center, team LEHA, UMR 1219, Bordeaux, France
| | - Per Hoffmann
- Department of Biomedicine, University of Basel, Basel, Switzerland; Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland; Institute of Human Genetics, University of Bonn Medical School, Bonn, Germany
| | - Georg Homuth
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - M Kamran Ikram
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Neurology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | | | - Neda Jahanshad
- Imaging Genetics Center, Mark & Mary Stevens Neuroimaging & Informatics Institute, Keck USC School of Medicine, Los Angeles, CA, USA
| | - Christiane Jockwitz
- Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Jülich, Germany; Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Medical Faculty, Aachen, Germany
| | - Yoichiro Kamatani
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Annchen R Knodt
- Laboratory of NeuroGenetics, Department of Psychology & Neuroscience, Duke University, Durham, NC, USA
| | - Shuo Li
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Keane Lim
- Research Division, Institute of Mental Health, Singapore, Singapore
| | - W T Longstreth
- Department of Neurology, University of Washington, Seattle, WA, USA; Department of Epidemiology, University of Washington, Seattle, WA, USA
| | - Fabio Macciardi
- Laboratory of Molecular Psychiatry, Department of Psychiatry and Human Behavior, School of Medicine, University of California, Irvine, Irvine, CA, USA
| | - Outi Mäkitie
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden; Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Folkhälsan Research Center, Helsinki, Finland
| | - Bernard Mazoyer
- Groupe d'imagerie neurofonctionnelle, Institut des Maladies Neurodégénératives, UMR 5293, CNRS, CEA, Université de Bordeaux, Bordeaux, France; Centre Hospitalo-Universitaire de Bordeaux, Bordeaux, France
| | - Sarah E Medland
- Psychiatric Genetics, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia; School of Psychology, University of Queensland, Brisbane, QLD, Australia; Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Susanne Moebus
- Institute for Urban Public Health, University of Duisburg-Essen, Essen, Germany
| | - Thomas H Mosley
- Department of Medicine, Division of Geriatrics, University of Mississippi Medical Center, Jackson, MS, USA; Memory Impairment and Neurodegenerative Dementia (MIND) Center, Jackson, MS, USA
| | - Ryan Muetzel
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Child and Adolescent Psychiatry, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Thomas W Mühleisen
- Department of Biomedicine, University of Basel, Basel, Switzerland; Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Jülich, Germany; C. and O. Vogt Institute for Brain Research, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Manabu Nagata
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Soichiro Nakahara
- Clinical Translational Neuroscience Laboratory, Department of Psychiatry and Human Behavior, University of California, Irvine, Irvine, CA, USA; Unit 2, Candidate Discovery Science Labs, Drug Discovery Research, Astellas Pharma Inc, 21 Miyukigaoka, Tsukuba, Ibaraki 305-8585, Japan
| | - Nicholette D Palmer
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Zdenka Pausova
- The Hospital for Sick Children, University of Toronto, Toronto, Canada; Departments of Physiology and Nutritional Sciences, University of Toronto, Toronto, Canada
| | - Adrian Preda
- Department of Psychiatry, University of California, Irvine, Irvine, CA, USA
| | - Yann Quidé
- School of Clinical Medicine, University of New South Wales, Sydney, NSW, Australia; Neuroscience Research Australia, Sydney, NSW, Australia
| | - William R Reay
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia; Centre for Brain and Mental Health Research, Hunter Medical Research Institute, Newcastle, NSW, Australia
| | - Gennady V Roshchupkin
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Reinhold Schmidt
- Clinical Division of Neurogeriatrics, Department of Neurology, Medical University of Graz, Graz, Austria
| | | | - Kazuya Setoh
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Chin Yang Shapland
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands; MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK; Population Health Sciences, University of Bristol, Bristol, UK
| | - Stephen Sidney
- Kaiser Permanente Division of Research, Oakland, CA, USA
| | - Beate St Pourcain
- Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen, the Netherlands; Donders Institute for Brain, Cognition, and Behaviour, Radboud University, Nijmegen, the Netherlands; MRC Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Jason L Stein
- Department of Genetics UNC Neuroscience Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Yasuharu Tabara
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Alexander Teumer
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany; Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Anne Uhlmann
- Department of Child and Adolescent Psychiatry, TU Dresden, Dresden, Germany
| | - Aad van der Lugt
- Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Meike W Vernooij
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - David J Werring
- Stroke Research Centre, University College London, Institute of Neurology, London, UK
| | - B Gwen Windham
- Department of Medicine, Division of Geriatrics, University of Mississippi Medical Center, Jackson, MS, USA; Memory Impairment and Neurodegenerative Dementia (MIND) Center, Jackson, MS, USA
| | - A Veronica Witte
- Department of Neurology, Max Planck Institute for Cognitive and Brain Sciences, Leipzig, Germany; Collaborative Research Center 1052 Obesity Mechanisms, Faculty of Medicine, University of Leipzig, Leipzig, Germany; Day Clinic for Cognitive Neurology, University Hospital Leipzig, Leipzig, Germany
| | - Katharina Wittfeld
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany; German Centre of Neurodegenerative Diseases (DZNE), Site Rostock/Greifswald, Greifswald, Germany
| | - Qiong Yang
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Kazumichi Yoshida
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Han G Brunner
- Department of Human Genetics, Donders Institute for Brain, Cognition, and Behaviour, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Clinical Genetics MUMC+, GROW School of Oncology and Developmental Biology, and MHeNs School of Mental Health and Neuroscience, Maastricht University, Maastricht, the Netherlands
| | - Quentin Le Grand
- Bordeaux Population Health, University of Bordeaux, INSERM U1219, Bordeaux, France
| | - Kang Sim
- West Region, Institute of Mental Health, Singapore, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Dan J Stein
- Department of Child and Adolescent Psychiatry, TU Dresden, Dresden, Germany; SAMRC Unit on Risk and Resilience, University of Cape Town, Cape Town, South Africa
| | - Donald W Bowden
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Murray J Cairns
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia; Centre for Brain and Mental Health Research, Hunter Medical Research Institute, Newcastle, NSW, Australia
| | - Ahmad R Hariri
- Laboratory of NeuroGenetics, Department of Psychology & Neuroscience, Duke University, Durham, NC, USA
| | - Ching-Lung Cheung
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China; Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China; Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Sture Andersson
- Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Arno Villringer
- Department of Neurology, Max Planck Institute for Cognitive and Brain Sciences, Leipzig, Germany; Day Clinic for Cognitive Neurology, University Hospital Leipzig, Leipzig, Germany
| | - Tomas Paus
- Departments of Psychiatry and Neuroscience, Faculty of Medicine and Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, QC, Canada; Department of Psychiatry, Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Sven Cichon
- Department of Biomedicine, University of Basel, Basel, Switzerland; Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland; Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Jülich, Germany
| | - Vince D Calhoun
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS) {Georgia State, Georgia Tech, Emory}, Atlanta, GA, USA
| | - Fabrice Crivello
- Groupe d'imagerie neurofonctionnelle, Institut des Maladies Neurodégénératives, UMR 5293, CNRS, CEA, Université de Bordeaux, Bordeaux, France
| | - Lenore J Launer
- Laboratory of Epidemiology, Demography, and Biometry, Intramural Research Program, National Institute of Aging, The National Institutes of Health, Bethesda, MD, USA
| | - Tonya White
- Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands; Department of Child and Adolescent Psychiatry, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Peter J Koudstaal
- Department of Neurology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Henry Houlden
- Stroke Research Centre, University College London, Institute of Neurology, London, UK
| | - Myriam Fornage
- Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA; Human Genetics Center, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Fumihiko Matsuda
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hans J Grabe
- Department of Psychiatry and Psychotherapy, University Medicine Greifswald, Greifswald, Germany
| | - M Arfan Ikram
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Stéphanie Debette
- Bordeaux Population Health, University of Bordeaux, INSERM U1219, Bordeaux, France; Department of Neurology, Bordeaux University Hospital, Bordeaux, France
| | - Paul M Thompson
- Imaging Genetics Center, Mark & Mary Stevens Neuroimaging & Informatics Institute, Keck USC School of Medicine, Los Angeles, CA, USA
| | - Sudha Seshadri
- Glenn Biggs Institute for Alzheimer's & Neurodegenerative Diseases, UT Health San Antonio, San Antonio, TX, USA; The Framingham Heart Study, Framingham, MA, USA; Department of Neurology, Boston University School of Medicine, Boston, MA, USA
| | - Hieab H H Adams
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Latin American Brain Health (BrainLat), Universidad Adolfo Ibáñez, Santiago, Chile.
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5
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Chen J, Landback P, Arsala D, Guzzetta A, Xia S, Atlas J, Sosa D, Zhang YE, Cheng J, Shen B, Long M. Evolutionarily new genes in humans with disease phenotypes reveal functional enrichment patterns shaped by adaptive innovation and sexual selection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.11.14.567139. [PMID: 38045239 PMCID: PMC10690195 DOI: 10.1101/2023.11.14.567139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
New genes (or young genes) are genetic novelties pivotal in mammalian evolution. Their phenotypic impacts and evolutionary pattern over time, however, remain elusive in humans due to the technical and ethical complexities in functional studies. By combining human gene age dating and Mendelian disease phenotyping, our research reveals a gradual increase in disease gene proportions with gene age. Logistic regression modeling indicates that this increase could be related to longer protein lengths and higher burdens of deleterious de novo germline variants (DNVs) for older genes. We also find a steady integration of new genes with biomedical phenotypes into the human genome over macroevolutionary timescales (~0.07% per million years). Despite this stable pace, we observe distinct patterns in phenotypic enrichment, pleiotropy, and selective pressures across gene ages. Notably, young genes show significant enrichment in diseases related to the male reproductive system, indicating strong sexual selection. Young genes also exhibit disease-related functions in tissues and systems potentially linked to human phenotypic innovations, such as increased brain size, musculoskeletal phenotypes, and color vision. We further reveal a logistic growth pattern of pleiotropy over evolutionary time, indicating a diminishing marginal growth of new functions for older genes due to intensifying selective constraints over time. We propose a "pleiotropy-barrier" model that delineates higher potentials of phenotypic innovation for young genes than for older genes, a process subject to natural selection. Our study demonstrates that evolutionary new genes are critical in influencing human reproductive evolution and adaptive phenotypic innovations driven by sexual and natural selection, with low pleiotropy as a selective advantage.
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Affiliation(s)
- Jianhai Chen
- Department of Ecology and Evolution, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
- Institutes for Systems Genetics, West China University Hospital, Chengdu 610041, China
| | - Patrick Landback
- Department of Ecology and Evolution, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
| | - Deanna Arsala
- Department of Ecology and Evolution, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
| | - Alexander Guzzetta
- Department of Pathology, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
| | - Shengqian Xia
- Department of Ecology and Evolution, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
| | - Jared Atlas
- Department of Ecology and Evolution, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
| | - Dylan Sosa
- Department of Ecology and Evolution, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
| | - Yong E. Zhang
- Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jingqiu Cheng
- Institutes for Systems Genetics, West China University Hospital, Chengdu 610041, China
| | - Bairong Shen
- Institutes for Systems Genetics, West China University Hospital, Chengdu 610041, China
| | - Manyuan Long
- Department of Ecology and Evolution, The University of Chicago, 1101 E 57th Street, Chicago, IL 60637
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6
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Llambrich S, Tielemans B, Saliën E, Atzori M, Wouters K, Van Bulck V, Platt M, Vanherp L, Gallego Fernandez N, Grau de la Fuente L, Poptani H, Verlinden L, Himmelreich U, Croitor A, Attanasio C, Callaerts-Vegh Z, Gsell W, Martínez-Abadías N, Vande Velde G. Pleiotropic effects of trisomy and pharmacologic modulation on structural, functional, molecular, and genetic systems in a Down syndrome mouse model. eLife 2024; 12:RP89763. [PMID: 38497812 PMCID: PMC10948151 DOI: 10.7554/elife.89763] [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] [Indexed: 03/19/2024] Open
Abstract
Down syndrome (DS) is characterized by skeletal and brain structural malformations, cognitive impairment, altered hippocampal metabolite concentration and gene expression imbalance. These alterations were usually investigated separately, and the potential rescuing effects of green tea extracts enriched in epigallocatechin-3-gallate (GTE-EGCG) provided disparate results due to different experimental conditions. We overcame these limitations by conducting the first longitudinal controlled experiment evaluating genotype and GTE-EGCG prenatal chronic treatment effects before and after treatment discontinuation. Our findings revealed that the Ts65Dn mouse model reflected the pleiotropic nature of DS, exhibiting brachycephalic skull, ventriculomegaly, neurodevelopmental delay, hyperactivity, and impaired memory robustness with altered hippocampal metabolite concentration and gene expression. GTE-EGCG treatment modulated most systems simultaneously but did not rescue DS phenotypes. On the contrary, the treatment exacerbated trisomic phenotypes including body weight, tibia microarchitecture, neurodevelopment, adult cognition, and metabolite concentration, not supporting the therapeutic use of GTE-EGCG as a prenatal chronic treatment. Our results highlight the importance of longitudinal experiments assessing the co-modulation of multiple systems throughout development when characterizing preclinical models in complex disorders and evaluating the pleiotropic effects and general safety of pharmacological treatments.
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Affiliation(s)
- Sergi Llambrich
- Biomedical MRI, Department of Imaging and Pathology, KU LeuvenLeuvenBelgium
| | - Birger Tielemans
- Biomedical MRI, Department of Imaging and Pathology, KU LeuvenLeuvenBelgium
| | - Ellen Saliën
- Biomedical MRI, Department of Imaging and Pathology, KU LeuvenLeuvenBelgium
| | - Marta Atzori
- Department of Human Genetics, KU LeuvenLeuvenBelgium
| | - Kaat Wouters
- Laboratory of Biological Psychology, KU LeuvenLeuvenBelgium
| | | | - Mark Platt
- Centre for Preclinical Imaging, Department of Molecular and Clinical Cancer Medicine, University of LiverpoolLiverpoolUnited Kingdom
| | - Laure Vanherp
- Biomedical MRI, Department of Imaging and Pathology, KU LeuvenLeuvenBelgium
| | - Nuria Gallego Fernandez
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Facultat de Biologia, Universitat de BarcelonaBarcelonaSpain
| | - Laura Grau de la Fuente
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Facultat de Biologia, Universitat de BarcelonaBarcelonaSpain
| | - Harish Poptani
- Centre for Preclinical Imaging, Department of Molecular and Clinical Cancer Medicine, University of LiverpoolLiverpoolUnited Kingdom
| | - Lieve Verlinden
- Clinical and Experimental Endocrinology, KU LeuvenLeuvenBelgium
| | - Uwe Himmelreich
- Biomedical MRI, Department of Imaging and Pathology, KU LeuvenLeuvenBelgium
| | - Anca Croitor
- Biomedical MRI, Department of Imaging and Pathology, KU LeuvenLeuvenBelgium
| | | | | | - Willy Gsell
- Biomedical MRI, Department of Imaging and Pathology, KU LeuvenLeuvenBelgium
| | - Neus Martínez-Abadías
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Facultat de Biologia, Universitat de BarcelonaBarcelonaSpain
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7
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Haddad L, Hadi E, Leibovitz Z, Lev D, Shalev Y, Gindes L, Lerman-Sagie T. Small size, big problems: insights and difficulties in prenatal diagnosis of fetal microcephaly. Front Neurosci 2024; 18:1347506. [PMID: 38533444 PMCID: PMC10964924 DOI: 10.3389/fnins.2024.1347506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/27/2024] [Indexed: 03/28/2024] Open
Abstract
Microcephaly is a sign, not a diagnosis. Its incidence varies widely due to the differences in the definition and the population being studied. It is strongly related to neurodevelopmental disorders. Differences in definitions and measurement techniques between fetuses and newborns pose a great challenge for the diagnosis and prognostication of fetal microcephaly. A false positive diagnosis can result (in countries where it is legal) in erroneous termination of pregnancy, where a false negative diagnosis might lead to the birth of a microcephalic newborn. Microcephaly in growth restricted fetuses deserves special attention and separate evaluation as it is an important prognostic factor, and not necessarily part of the general growth retardation. Several genetic syndromes incorporating microcephaly and intrauterine growth retardation (IUGR) are discussed. Deceleration of the head circumference (HC) growth rate even when the HC is still within normal limits might be the only clue for developing microcephaly and should be considered during fetal head growth follow up. Combining additional parameters such as a positive family history, associated anomalies, and new measurement parameters can improve prediction in about 50% of cases, and thus should be part of the prenatal workup. Advances in imaging modalities and in prenatal genetic investigation along with the emergence of new growth charts can also improve diagnostic accuracy. In this article, we review the different definitions and etiologies of fetal microcephaly, discuss difficulties in diagnosis, investigate the reasons for the low yield of prenatal diagnosis, and provide improvement suggestions. Finally, we suggest an updated algorithm that will aid in the diagnosis and management of fetal microcephaly.
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Affiliation(s)
- Leila Haddad
- Fetal Neurology Clinic, Wolfson Medical Center, Holon, Israel
- Obstetrics & Gynecology Ultrasound Unit, Wolfson Medical Center, Holon, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Efrat Hadi
- Fetal Neurology Clinic, Wolfson Medical Center, Holon, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Diagnostic Ultrasound Unit, The Institute of Obstetrical and Gynecological Imaging, Department of Obstetrics and Gynecology, Sheba Medical Center, Ramat Gan, Israel
| | - Zvi Leibovitz
- Obstetrics & Gynecology Ultrasound Unit, Bnai Zion Medical Center, Haifa, Israel
- Rappaport Faculty of Medicine, Technion-Israel Institute, Haifa, Israel
| | - Dorit Lev
- Fetal Neurology Clinic, Wolfson Medical Center, Holon, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Medical Genetics Unit, Wolfson Medical Center, Holon, Israel
| | - Yoseph Shalev
- Obstetrics & Gynecology Ultrasound Unit, Wolfson Medical Center, Holon, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Liat Gindes
- Fetal Neurology Clinic, Wolfson Medical Center, Holon, Israel
- Obstetrics & Gynecology Ultrasound Unit, Wolfson Medical Center, Holon, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Tally Lerman-Sagie
- Fetal Neurology Clinic, Wolfson Medical Center, Holon, Israel
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Pediatric Neurology Unit, Wolfson Medical Center, Holon, Israel
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8
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Szalai R, Till A, Gyenesei A, Bene J, Hadzsiev K. Importance and application of WES in fetal genetic diagnostics: Identification of novel ASPM mutation in a fetus with microcephaly. Mol Genet Metab Rep 2024; 38:101056. [PMID: 38469100 PMCID: PMC10926227 DOI: 10.1016/j.ymgmr.2024.101056] [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: 08/17/2023] [Revised: 01/10/2024] [Accepted: 01/15/2024] [Indexed: 03/13/2024] Open
Abstract
Background Prenatal whole exome sequencing (WES) approaches can provide genetic diagnosis with rapid turnaround time and high diagnostic rate when conventional tests are negative. Here we report a family with multiple pregnancy loss and with repeated occurrence of fetal microcephaly. Methods and results Because of positive family history and recurrent structural abnormality during the pregnancies that may lead postnatal neurodevelopmental consequences, WES analysis was indicated. Umbilical cord blood sampling was carried out and WES was performed using Twist Human Core Exome Kit and Illumina sequencing technology. The presence of pathogenic variants was confirmed by Sanger sequencing. WES analysis revealed a known pathogenic c.8506_8507delCA (p.Gln2836Glufs*35, rs587783280) and a novel pathogenic c.3134_3135delTC (p.Leu1045Glnfs*17) ASPM mutations in the fetus in compound heterozygous state. The c.3134_3135delTC has never been reported in the literature. Conclusions Our findings serve additional evidence that WES can be an efficient and relevant tool to diagnose certain genetic disorders with appropriate indication and to assess the recurrence risk of a disease. With the application of WES in combination with pre-implantation genetic tests, we can avoid the transmission of pathogenic mutations and we can achieve a decreased abortion rate in obstetric care.
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Affiliation(s)
- Renata Szalai
- University of Pecs, Medical School, Department of Medical Genetics, Pecs, Hungary
| | - Agnes Till
- University of Pecs, Medical School, Department of Medical Genetics, Pecs, Hungary
| | - Attila Gyenesei
- Szentagothai Research Center, University of Pecs, Pecs, Hungary
| | - Judit Bene
- University of Pecs, Medical School, Department of Medical Genetics, Pecs, Hungary
| | - Kinga Hadzsiev
- University of Pecs, Medical School, Department of Medical Genetics, Pecs, Hungary
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9
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Liu L, Zhao S. Correlation analysis of maternal condition during pregnancy with head circumference and autism spectrum disorder: A propensity score-matched study. Medicine (Baltimore) 2024; 103:e36104. [PMID: 38335372 PMCID: PMC10860991 DOI: 10.1097/md.0000000000036104] [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: 05/07/2023] [Revised: 10/22/2023] [Accepted: 10/23/2023] [Indexed: 02/12/2024] Open
Abstract
To determine whether health status during pregnancy is associated with autism spectrum disorder (ASD) and abnormal head circumference (HC) in the offspring. This study included 41 Han children with ASD who visited the Children's Health Clinic of the Second Hospital of Shandong University between March 2018 and February 2019, and 264 Han children with typical development (TD) who visited the clinic during the same period. Physical measurements were performed on the children. The questionnaire obtained information on maternal risk factors that may be related to the increased risk of ASD and folic acid (FA) supplementation. We designed an observational case-control study using propensity score matching and multivariate logistic regression analysis. The incidence of macrocephaly in the ASD group was 22.0%, significantly higher than that in the TD group (1.8%). The incidence of microcephaly in the ASD group was 17.1% (n = 7), significantly higher than that in the TD group (1.8%). The differences between the comparisons were statistically significant. Maternal FA supplementation during pregnancy was significantly associated with ASD (P < .05), with an odds ratio (95% confidence interval of 3.69 (1.76, 7.76)). Also was associated with macrocephaly (P < .05), odds ratio (95% confidence interval) were 8.13 (1.63, 40.61) and 4.16 (1.18, 14.60), respectively. The incidence of abnormal HC was higher in the ASD group than that in the TD group. Maternal FA supplementation during pregnancy may be negatively associated with the occurrence of ASD and abnormal HC in the offspring. Further examination of the role of maternal health status in the etiology of ASD is recommended.
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Affiliation(s)
- Lei Liu
- Department of Burns and Plastic Surgery, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, People’s Republic of China
| | - Shichun Zhao
- Department of Paediatrics, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong Province, People’s Republic of China
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10
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Shinar S, Chitayat D, Shannon P, Blaser S. Fetal macrocephaly: Pathophysiology, prenatal diagnosis and management. Prenat Diagn 2023; 43:1650-1661. [PMID: 38009873 DOI: 10.1002/pd.6473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023]
Abstract
Macrocephaly means a large head and is defined as a head circumference (HC) above the 98th percentile or greater than +2SD above the mean for gestational age. Macrocephaly can be primary and due to increased brain tissue (megalocephaly), which in most cases is familial and benign or secondary. The latter may be due to various causes, including but not limited to communicating or non-communicating hydrocephalus, cerebral edema, focal and pericerebral increased fluid collections, thickened calvarium and brain tumors. Megalocephaly can be syndromic or non-syndromic. In the former, gyral and structural CNS anomalies are common. It is important to exercise caution when considering a diagnosis of megalocephaly due to limitations in the accuracy of HC measurement, lack of nomograms for specific populations, inconsistencies between prenatal and postnatal HC growth curves and progression over time. The degree of macrocephaly is important, with mild macrocephaly ≤2.5SD carrying a good prognosis, especially when one of the parents has macrocephaly and normal development. Cases in which the patient history and/or physical exam are positive or when parental HC are normal are more worrisome and warrant a neurosonogram, fetal MRI and genetic testing to better delineate the underlying etiology and provide appropriate counseling.
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Affiliation(s)
- Shiri Shinar
- Department of Obstetrics and Gynaecology, Division of Maternal Fetal Medicine, Ontario Fetal Centre, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - David Chitayat
- Department of Obstetrics and Gynecology, Prenatal Diagnosis and Medical Genetics Program, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
- Division of Clinical and Metabolic Genetics, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Patrick Shannon
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Susan Blaser
- Department of Diagnostic Imaging, Department of Medical Imaging, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
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11
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Lim Y. Transcription factors in microcephaly. Front Neurosci 2023; 17:1302033. [PMID: 38094004 PMCID: PMC10716367 DOI: 10.3389/fnins.2023.1302033] [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: 09/25/2023] [Accepted: 11/06/2023] [Indexed: 02/01/2024] Open
Abstract
Higher cognition in humans, compared to other primates, is often attributed to an increased brain size, especially forebrain cortical surface area. Brain size is determined through highly orchestrated developmental processes, including neural stem cell proliferation, differentiation, migration, lamination, arborization, and apoptosis. Disruption in these processes often results in either a small (microcephaly) or large (megalencephaly) brain. One of the key mechanisms controlling these developmental processes is the spatial and temporal transcriptional regulation of critical genes. In humans, microcephaly is defined as a condition with a significantly smaller head circumference compared to the average head size of a given age and sex group. A growing number of genes are identified as associated with microcephaly, and among them are those involved in transcriptional regulation. In this review, a subset of genes encoding transcription factors (e.g., homeobox-, basic helix-loop-helix-, forkhead box-, high mobility group box-, and zinc finger domain-containing transcription factors), whose functions are important for cortical development and implicated in microcephaly, are discussed.
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Affiliation(s)
- Youngshin Lim
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Biomedical Science Education, Charles R. Drew University of Medicine and Science, Los Angeles, CA, United States
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12
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Chen J. Evolutionarily new genes in humans with disease phenotypes reveal functional enrichment patterns shaped by adaptive innovation and sexual selection. RESEARCH SQUARE 2023:rs.3.rs-3632644. [PMID: 38045389 PMCID: PMC10690325 DOI: 10.21203/rs.3.rs-3632644/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
New genes (or young genes) are structural novelties pivotal in mammalian evolution. Their phenotypic impact on humans, however, remains elusive due to the technical and ethical complexities in functional studies. Through combining gene age dating with Mendelian disease phenotyping, our research reveals that new genes associated with disease phenotypes steadily integrate into the human genome at a rate of ~ 0.07% every million years over macroevolutionary timescales. Despite this stable pace, we observe distinct patterns in phenotypic enrichment, pleiotropy, and selective pressures between young and old genes. Notably, young genes show significant enrichment in the male reproductive system, indicating strong sexual selection. Young genes also exhibit functions in tissues and systems potentially linked to human phenotypic innovations, such as increased brain size, bipedal locomotion, and color vision. Our findings further reveal increasing levels of pleiotropy over evolutionary time, which accompanies stronger selective constraints. We propose a "pleiotropy-barrier" model that delineates different potentials for phenotypic innovation between young and older genes subject to natural selection. Our study demonstrates that evolutionary new genes are critical in influencing human reproductive evolution and adaptive phenotypic innovations driven by sexual and natural selection, with low pleiotropy as a selective advantage.
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13
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Abbott N, Love T. Bridging the Divide: Brain and Behavior in Developmental Language Disorder. Brain Sci 2023; 13:1606. [PMID: 38002565 PMCID: PMC10670267 DOI: 10.3390/brainsci13111606] [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: 09/15/2023] [Revised: 11/14/2023] [Accepted: 11/16/2023] [Indexed: 11/26/2023] Open
Abstract
Developmental language disorder (DLD) is a heterogenous neurodevelopmental disorder that affects a child's ability to comprehend and/or produce spoken and/or written language, yet it cannot be attributed to hearing loss or overt neurological damage. It is widely believed that some combination of genetic, biological, and environmental factors influences brain and language development in this population, but it has been difficult to bridge theoretical accounts of DLD with neuroimaging findings, due to heterogeneity in language impairment profiles across individuals and inconsistent neuroimaging findings. Therefore, the purpose of this overview is two-fold: (1) to summarize the neuroimaging literature (while drawing on findings from other language-impaired populations, where appropriate); and (2) to briefly review the theoretical accounts of language impairment patterns in DLD, with the goal of bridging the disparate findings. As will be demonstrated with this overview, the current state of the field suggests that children with DLD have atypical brain volume, laterality, and activation/connectivity patterns in key language regions that likely contribute to language difficulties. However, the precise nature of these differences and the underlying neural mechanisms contributing to them remain an open area of investigation.
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Affiliation(s)
- Noelle Abbott
- School of Speech, Language, and Hearing Sciences, San Diego State University, San Diego, CA 92182, USA;
- San Diego State University/University of California San Diego Joint Doctoral Program in Language and Communicative Disorders, San Diego, CA 92182, USA
| | - Tracy Love
- School of Speech, Language, and Hearing Sciences, San Diego State University, San Diego, CA 92182, USA;
- San Diego State University/University of California San Diego Joint Doctoral Program in Language and Communicative Disorders, San Diego, CA 92182, USA
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14
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She R, Fair T, Schaefer NK, Saunders RA, Pavlovic BJ, Weissman JS, Pollen AA. Comparative landscape of genetic dependencies in human and chimpanzee stem cells. Cell 2023; 186:2977-2994.e23. [PMID: 37343560 PMCID: PMC10461406 DOI: 10.1016/j.cell.2023.05.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 03/14/2023] [Accepted: 05/26/2023] [Indexed: 06/23/2023]
Abstract
Comparative studies of great apes provide a window into our evolutionary past, but the extent and identity of cellular differences that emerged during hominin evolution remain largely unexplored. We established a comparative loss-of-function approach to evaluate whether human cells exhibit distinct genetic dependencies. By performing genome-wide CRISPR interference screens in human and chimpanzee pluripotent stem cells, we identified 75 genes with species-specific effects on cellular proliferation. These genes comprised coherent processes, including cell-cycle progression and lysosomal signaling, which we determined to be human-derived by comparison with orangutan cells. Human-specific robustness to CDK2 and CCNE1 depletion persisted in neural progenitor cells and cerebral organoids, supporting the G1-phase length hypothesis as a potential evolutionary mechanism in human brain expansion. Our findings demonstrate that evolutionary changes in human cells reshaped the landscape of essential genes and establish a platform for systematically uncovering latent cellular and molecular differences between species.
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Affiliation(s)
- Richard She
- Whitehead Institute for Biomedical Research, Cambridge, MA, USA
| | - Tyler Fair
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA; Biomedical Sciences Graduate Program, University of California, San Francisco, San Francisco, CA, USA
| | - Nathan K Schaefer
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA; Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
| | - Reuben A Saunders
- Whitehead Institute for Biomedical Research, Cambridge, MA, USA; Department of Cellular and Molecular Pharmacology, University of California at San Francisco, San Francisco, CA, USA
| | - Bryan J Pavlovic
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA; Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
| | - Jonathan S Weissman
- Whitehead Institute for Biomedical Research, Cambridge, MA, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA; Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA, USA; David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute Technology, Cambridge, MA 02142, USA.
| | - Alex A Pollen
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA, USA; Department of Neurology, University of California, San Francisco, San Francisco, CA, USA.
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15
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Tokunaga M, Imamura T. Emerging concepts involving inhibitory and activating RNA functionalization towards the understanding of microcephaly phenotypes and brain diseases in humans. Front Cell Dev Biol 2023; 11:1168072. [PMID: 37408531 PMCID: PMC10318543 DOI: 10.3389/fcell.2023.1168072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 06/12/2023] [Indexed: 07/07/2023] Open
Abstract
Microcephaly is characterized as a small head circumference, and is often accompanied by developmental disorders. Several candidate risk genes for this disease have been described, and mutations in non-coding regions are occasionally found in patients with microcephaly. Various non-coding RNAs (ncRNAs), such as microRNAs (miRNAs), SINEUPs, telomerase RNA component (TERC), and promoter-associated lncRNAs (pancRNAs) are now being characterized. These ncRNAs regulate gene expression, enzyme activity, telomere length, and chromatin structure through RNA binding proteins (RBPs)-RNA interaction. Elucidating the potential roles of ncRNA-protein coordination in microcephaly pathogenesis might contribute to its prevention or recovery. Here, we introduce several syndromes whose clinical features include microcephaly. In particular, we focus on syndromes for which ncRNAs or genes that interact with ncRNAs may play roles. We discuss the possibility that the huge ncRNA field will provide possible new therapeutic approaches for microcephaly and also reveal clues about the factors enabling the evolutionary acquisition of the human-specific "large brain."
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16
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Ji XS, Ji XL, Xiong M, Zhou WH. Modeling congenital brain malformations with brain organoids: a narrative review. Transl Pediatr 2023; 12:68-78. [PMID: 36798935 PMCID: PMC9926131 DOI: 10.21037/tp-22-239] [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: 05/31/2022] [Accepted: 11/10/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND OBJECTIVE During embryonic development, the dysregulation of the proliferation and differentiation of neuronal progenitors triggers congenital brain malformations. These malformations are common causes of morbidity and mortality in patients younger than 2 years old. Animal models have provided considerable insights into the etiology of diseases that cause congenital brain malformations. However, the interspecies differences in brain structure limit the ability to transfer these insights directly to studies of humans. In recent years, brain organoids generated from human embryonic stem cells (hESCs) or human induced pluripotent stem cells (hiPSCs) using a 3-dimensional (3D) culture system have been used to resemble the structure and function of a developing human brain. Therefore, we aimed to summarize the different congenital brain malformations that have been modeled by organoids and discuss the ability of this model to reveal the cellular and molecular mechanisms of congenital brain malformations. METHODS A comprehensive search was performed using PubMed and Web of Science's Core Collection for literature published from July 1, 2000 to July 1, 2022. Keywords included terms related to brain organoids and congenital brain malformations, as well as names of individual malformations. KEY CONTENT AND FINDINGS The self-assembled 3D aggregates have been used to recapitulate structural malformations of human brains, such as microcephaly, macrocephaly, lissencephaly (LIS), and periventricular nodular heterotopia (PH). The use of disease-specific brain organoids has revealed unprecedented details of mechanisms that cause congenital brain malformations. CONCLUSIONS This review summarizes the establishment and development of brain organoid technologies and provides an overview of their applications in modeling congenital brain malformations. Although several hurdles still need to be overcome, using brain organoids has greatly expanded our ability to reveal the pathogenesis of congenital brain malformations. Compared with existing methods, the combination with cutting-edge technologies enables a more accurate diagnosis and development of increasingly personalized targeted therapy for patients with congenital brain diseases.
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Affiliation(s)
- Xiao-Shan Ji
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China.,Key Laboratory of Birth Defects, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Xiao-Li Ji
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China.,Key Laboratory of Birth Defects, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Man Xiong
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Wen-Hao Zhou
- Department of Neonatology, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China.,Key Laboratory of Birth Defects, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
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17
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Romero VI, Arias-Almeida B, Aguiar SA. NSD1 gene evolves under episodic selection within primates and mutations of specific exons in humans cause Sotos syndrome. BMC Genomics 2022; 23:849. [PMID: 36550402 PMCID: PMC9783842 DOI: 10.1186/s12864-022-09071-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Modern human brains and skull shapes differ from other hominids. Brain growth disorders as micro- (ASPM, MCPH1) and macrocephaly (NFIX, GLI3) have been highlighted as relevant for the evolution in humans due to the impact in early brain development. Genes associated with macrocephaly have been reported to cause this change, for example NSD1 which causes Sotos syndrome. RESULTS In this study we performed a systematic literature review, located the reported variants associated to Sotos syndrome along the gene domains, compared the sequences with close primates, calculated their similarity, Ka/Ks ratios, nucleotide diversity and selection, and analyzed the sequence and structural conservation with distant primates. We aimed to understand if NSD1 in humans differs from other primates since the evolution of NSD1 has not been analyzed in primates, nor if the localization of the mutations is limited to humans. Our study found that most variations causing Sotos syndrome are in exon 19, 22 and 10. In the primate comparison we did not detect Ka/Ks ratios > 1, but a high nucleotide diversity with non-synonymous variations in exons 10, 5, 9, 11 and 23, and sites under episodic selection in exon 5 and 23, and human, macaque/colobus/tarsier/galago and tarsier/lemur/colobus. Most of the domains are conserved in distant primates with a particular progressive development from a simple PWWP1 in O. garnetti to a complex structure in Human. CONCLUSION NSD1 is a chromatin modifier that suggests that the selection could influence brain development during modern human evolution and is not present in other primates; however, nowadays the nucleotide diversity is associated with Sotos syndrome.
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Affiliation(s)
- Vanessa I. Romero
- School of Medicine, Universidad San Francisco de Quito, Quito, Ecuador
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18
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Bastos GC, Tolezano GC, Krepischi ACV. Rare CNVs and Known Genes Linked to Macrocephaly: Review of Genomic Loci and Promising Candidate Genes. Genes (Basel) 2022; 13:genes13122285. [PMID: 36553552 PMCID: PMC9778424 DOI: 10.3390/genes13122285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
Macrocephaly frequently occurs in single-gene disorders affecting the PI3K-AKT-MTOR pathway; however, epigenetic mutations, mosaicism, and copy number variations (CNVs) are emerging relevant causative factors, revealing a higher genetic heterogeneity than previously expected. The aim of this study was to investigate the role of rare CNVs in patients with macrocephaly and review genomic loci and known genes. We retrieved from the DECIPHER database de novo <500 kb CNVs reported on patients with macrocephaly; in four cases, a candidate gene for macrocephaly could be pinpointed: a known microcephaly gene-TRAPPC9, and three genes based on their functional roles-RALGAPB, RBMS3, and ZDHHC14. From the literature review, 28 pathogenic CNV genomic loci and over 300 known genes linked to macrocephaly were gathered. Among the genomic regions, 17 CNV loci (~61%) exhibited mirror phenotypes, that is, deletions and duplications having opposite effects on head size. Identifying structural variants affecting head size can be a preeminent source of information about pathways underlying brain development. In this study, we reviewed these genes and recurrent CNV loci associated with macrocephaly, as well as suggested novel potential candidate genes deserving further studies to endorse their involvement with this phenotype.
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Massimo M, Long KR. Orchestrating human neocortex development across the scales; from micro to macro. Semin Cell Dev Biol 2022; 130:24-36. [PMID: 34583893 DOI: 10.1016/j.semcdb.2021.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 08/27/2021] [Accepted: 09/10/2021] [Indexed: 10/20/2022]
Abstract
How our brains have developed to perform the many complex functions that make us human has long remained a question of great interest. Over the last few decades, many scientists from a wide range of fields have tried to answer this question by aiming to uncover the mechanisms that regulate the development of the human neocortex. They have approached this on different scales, focusing microscopically on individual cells all the way up to macroscopically imaging entire brains within living patients. In this review we will summarise these key findings and how they fit together.
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Affiliation(s)
- Marco Massimo
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE1 1UL, United Kingdom; MRC Centre for Neurodevelopmental Disorders, King's College London, London SE1 1UL, United Kingdom
| | - Katherine R Long
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London SE1 1UL, United Kingdom; MRC Centre for Neurodevelopmental Disorders, King's College London, London SE1 1UL, United Kingdom.
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20
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Hu M, Li H, Huang Z, Li D, Xu Y, Xu Q, Chen B, Wang Y, Deng J, Zhu M, Feng W, Xu X. Novel compound heterozygous mutation in STAMBP causes a neurodevelopmental disorder by disrupting cortical proliferation. Front Neurosci 2022; 16:963813. [PMID: 36033615 PMCID: PMC9399766 DOI: 10.3389/fnins.2022.963813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 07/19/2022] [Indexed: 11/13/2022] Open
Abstract
Background Mutations in the STAMBP gene, which encodes a deubiquitinating isopeptidase called STAM-binding protein, are related to global developmental delay, microcephaly, and capillary malformation. Owing to the limited number of reported cases, the functional and phenotypic characteristics of STAMBP variants require further elucidation. Materials and methods Whole exome sequencing was performed on a patient presenting with a neurodevelopmental disorder. Novel compound heterozygous mutations in STAMBP [c.843_844del (p.C282Wfs*11) and c.920G > A (p.G307E)] were identified and validated using Sanger sequencing. A 3D human cortical organoid model was used to investigate the function of STAMBP and the pathogenicity of the novel mutation (c.920G > A, p.G307E). Results The patient was presented with global developmental delay, autism spectrum disorder, microcephaly, epilepsy, and dysmorphic facial features but without apparent capillary malformation on the skin and organs. Cortical organoids with STAMBP knockout (KO) showed significantly lower proliferation of neural stem cells (NSCs), leading to smaller organoids that are characteristic of microcephaly. Furthermore, STAMBP disruption did not affect apoptosis in early cortical organoids. After re-expressing wild-type STAMBP, STAMBPG307E, and STAMBPT313I (a known pathogenic mutation) within STAMBP KO organoids, only STAMBPWT rescued the impaired proliferation of STAMBP deficient organoids, but not STAMBPG307E and STAMBPT313I. Conclusion Our findings demonstrate that the clinical phenotype of STAMBP mutations is highly variable, and patients with different STAMBP mutations show differences in the severity of symptoms. The STAMBP missense mutation identified here is a novel pathogenic mutation that impairs the proliferation of NSCs in human brain development.
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Affiliation(s)
- Meixin Hu
- Department of Child Health Care, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
| | - Huiping Li
- Department of Child Health Care, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- *Correspondence: Huiping Li,
| | - Zhuxi Huang
- Institute of Pediatrics, Children’s Hospital of Fudan University, Shanghai, China
- Shanghai Key Laboratory of Medical Epigenetics, International Co-Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Dongyun Li
- Department of Child Health Care, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
| | - Ying Xu
- Institute of Pediatrics, Children’s Hospital of Fudan University, Shanghai, China
- Shanghai Key Laboratory of Medical Epigenetics, International Co-Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Qiong Xu
- Department of Child Health Care, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
| | - Bo Chen
- Institute of Pediatrics, Children’s Hospital of Fudan University, Shanghai, China
- Shanghai Key Laboratory of Medical Epigenetics, International Co-Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yi Wang
- Department of Child Health Care, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
| | - Jingxin Deng
- Department of Child Health Care, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
| | - Ming Zhu
- Institute of Pediatrics, Children’s Hospital of Fudan University, Shanghai, China
- Shanghai Key Laboratory of Medical Epigenetics, International Co-Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Weijun Feng
- Institute of Pediatrics, Children’s Hospital of Fudan University, Shanghai, China
- Shanghai Key Laboratory of Medical Epigenetics, International Co-Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
- Weijun Feng,
| | - Xiu Xu
- Department of Child Health Care, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Xiu Xu,
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Beltrami B, Cerasani J, Consales A, Villa R, Resta N, Loconte DC, Boito S, Caschera L, Bassi L, Colombo L, Iascone M, Bedeschi MF. Prenatal overgrowth and polydramnios: Would you think about Noonan syndrome? Clin Case Rep 2022; 10:e6256. [PMID: 36017115 PMCID: PMC9393876 DOI: 10.1002/ccr3.6256] [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: 03/10/2022] [Revised: 06/17/2022] [Accepted: 07/21/2022] [Indexed: 11/08/2022] Open
Abstract
We report on a child with prenatal findings of increased nuchal translucency, polydramnios, ascites, and overgrowth. At birth, she presented length >97° centile, minor facial anomalies, megalencephaly, and Wolff-Parkinson-White syndrome. Whole-exome sequencing showed a pathogenic variant in the NRAS gene, but no mutations were found in PI3K/AKT/mTOR pathway genes.
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Affiliation(s)
- Benedetta Beltrami
- Medical Genetics UnitFondazione IRCCS Ca'Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Jacopo Cerasani
- Neonatal Intensive Care Unit (NICU), Department of Clinical Science and Community HealthUniversità degli Studi di Milano and Fondazione IRCCS Ca’ Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Alessandra Consales
- Neonatal Intensive Care Unit (NICU), Department of Clinical Science and Community HealthUniversità degli Studi di Milano and Fondazione IRCCS Ca’ Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Roberta Villa
- Medical Genetics UnitFondazione IRCCS Ca'Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Nicoletta Resta
- Department of Biomedical Sciences and Human Oncology (DIMO), Medical GeneticsUniversity of Bari “Aldo Moro”BariItaly
| | - Daria Carmela Loconte
- Department of Biomedical Sciences and Human Oncology (DIMO), Medical GeneticsUniversity of Bari “Aldo Moro”BariItaly
| | - Simona Boito
- Fetal Medicine and Surgery ServiceFondazione IRCCS Ca’ Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Luca Caschera
- Neuroradiology UnitFondazione IRCCS Ca' Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Laura Bassi
- Neonatal Intensive Care Unit (NICU), Department of Clinical Science and Community HealthUniversità degli Studi di Milano and Fondazione IRCCS Ca’ Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Lorenzo Colombo
- Neonatal Intensive Care Unit (NICU), Department of Clinical Science and Community HealthUniversità degli Studi di Milano and Fondazione IRCCS Ca’ Granda Ospedale Maggiore PoliclinicoMilanItaly
| | - Maria Iascone
- Laboratory of Medical GeneticsOspedale Papa Giovanni XXIIIBergamoItaly
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Thomas AX, Link N, Robak LA, Demmler‐Harrison G, Pao EC, Squire AE, Michels S, Cohen JS, Comi A, Prontera P, Verrotti di Pianella A, Di Cara G, Garavelli L, Caraffi SG, Fusco C, Zuntini R, Parks KC, Sherr EH, Hashem MO, Maddirevula S, Alkuraya FS, Contractar IAF, Neil JE, Walsh CA, Bellen HJ, Chao H, Clark RD, Mirzaa GM. ANKLE2-related microcephaly: A variable microcephaly syndrome resembling Zika infection. Ann Clin Transl Neurol 2022; 9:1276-1288. [PMID: 35871307 PMCID: PMC9380164 DOI: 10.1002/acn3.51629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 06/23/2022] [Accepted: 06/27/2022] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVE This study delineates the clinical and molecular spectrum of ANKLE2-related microcephaly (MIC), as well as highlights shared pathological mechanisms between ANKLE2 and the Zika virus. METHODS We identified 12 individuals with MIC and variants in ANKLE2 with a broad range of features. Probands underwent thorough phenotypic evaluations, developmental assessments, and anthropometric measurements. Brain imaging studies were systematically reviewed for developmental abnormalities. We functionally interrogated a subset of identified ANKLE2 variants in Drosophila melanogaster. RESULTS All individuals had MIC (z-score ≤ -3), including nine with congenital MIC. We identified a broad range of brain abnormalities including simplified cortical gyral pattern, full or partial callosal agenesis, increased extra-axial spaces, hypomyelination, cerebellar vermis hypoplasia, and enlarged cisterna magna. All probands had developmental delays in at least one domain, with speech and language delays being the most common. Six probands had skin findings characteristic of ANKLE2 including hyper- and hypopigmented macules. Only one individual had scalp rugae. Functional characterization in Drosophila recapitulated the human MIC phenotype. Of the four variants tested, p.Val229Gly, p.Arg236*, and p.Arg536Cys acted as partial-loss-of-function variants, whereas the c.1421-1G>C splicing variant demonstrated a strong loss-of-function effect. INTERPRETATION Deleterious variants in the ANKLE2 gene cause a unique MIC syndrome characterized by congenital or postnatal MIC, a broad range of structural brain abnormalities, and skin pigmentary changes. Thorough functional characterization has identified shared pathogenic mechanisms between ANKLE2-related MIC and congenital Zika virus infection. This study further highlights the importance of a thorough diagnostic evaluation including molecular diagnostic testing in individuals with MIC.
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Affiliation(s)
- Ajay X. Thomas
- Division Neurology and Developmental Neuroscience, Department of PediatricsBaylor College of MedicineHoustonTexasUSA
- Jan and Dan Duncan Neurological Research InstituteTexas Children's HospitalHoustonTexasUSA
| | - Nichole Link
- Department of NeurobiologyUniversity of UtahSalt Lake CityUtahUSA
| | - Laurie A. Robak
- Jan and Dan Duncan Neurological Research InstituteTexas Children's HospitalHoustonTexasUSA
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexasUSA
| | - Gail Demmler‐Harrison
- Division Infectious Diseases, Department of PediatricsBaylor College of MedicineHoustonTexasUSA
| | | | | | | | - Julie S. Cohen
- Department of Neurology and Developmental MedicineKennedy Krieger InstituteBaltimoreMarylandUSA
- Department of NeurologyJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Anne Comi
- Department of Neurology and Developmental MedicineKennedy Krieger InstituteBaltimoreMarylandUSA
- Department of NeurologyJohns Hopkins University School of MedicineBaltimoreMarylandUSA
- Department of PediatricsJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Paolo Prontera
- Medical Genetics UnitUniversity and Hospital of PerugiaPerugiaItaly
| | | | - Giuseppe Di Cara
- Pediatric Clinic, Department of Medical and Surgical SciencesUniversity of PerugiaPerugiaItaly
| | - Livia Garavelli
- Medical Genetics UnitAzienda USL‐IRCCS di Reggio EmiliaReggio EmiliaItaly
| | | | - Carlo Fusco
- Child Neurology and Psychiatry UnitAzienda USL‐IRCCS di Reggio EmiliaReggio EmiliaItaly
| | - Roberta Zuntini
- Medical Genetics UnitAzienda USL‐IRCCS di Reggio EmiliaReggio EmiliaItaly
| | - Kendall C. Parks
- Department of Neurology, Institute of Human GeneticsUniversity of California in San FranciscoSan FranciscoCaliforniaUSA
| | - Elliott H. Sherr
- Department of Neurology, Institute of Human GeneticsUniversity of California in San FranciscoSan FranciscoCaliforniaUSA
| | - Mais O. Hashem
- Department of Translational Genomics, Center for Genomic MedicineKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Sateesh Maddirevula
- Department of Translational Genomics, Center for Genomic MedicineKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | - Fowzan S. Alkuraya
- Department of Translational Genomics, Center for Genomic MedicineKing Faisal Specialist Hospital and Research CenterRiyadhSaudi Arabia
| | | | - Jennifer E. Neil
- Division of Genetics and Genomics and Howard Hughes Medical InstituteBoston Children's HospitalBostonMassachusettsUSA
| | - Christopher A. Walsh
- Division of Genetics and Genomics and Howard Hughes Medical InstituteBoston Children's HospitalBostonMassachusettsUSA
- Departments of Pediatrics and NeurologyHarvard Medical SchoolBostonMassachusettsUSA
| | - Hugo J. Bellen
- Jan and Dan Duncan Neurological Research InstituteTexas Children's HospitalHoustonTexasUSA
- Division Infectious Diseases, Department of PediatricsBaylor College of MedicineHoustonTexasUSA
- Howard Hughes Medical InstituteBaylor College of MedicineHoustonTexasUSA
- Department of NeuroscienceBaylor College of MedicineHoustonTexasUSA
| | - Hsiao‐Tuan Chao
- Division Neurology and Developmental Neuroscience, Department of PediatricsBaylor College of MedicineHoustonTexasUSA
- Jan and Dan Duncan Neurological Research InstituteTexas Children's HospitalHoustonTexasUSA
- Department of Molecular and Human GeneticsBaylor College of MedicineHoustonTexasUSA
- Department of NeuroscienceBaylor College of MedicineHoustonTexasUSA
- McNair Medical InstituteThe Robert and Janice McNair FoundationHoustonTexasUSA
| | - Robin D. Clark
- Division of Clinical Genetics, Department of PediatricsLoma Linda UniversityLoma LindaCaliforniaUSA
| | - Ghayda M. Mirzaa
- Center for Integrative Brain ResearchSeattle Children's Research InstituteSeattleWashingtonUSA
- Department of PediatricsUniversity of WashingtonSeattleWashingtonUSA
- Brotman‐Baty Institute for Precision MedicineSeattleWashingtonUSA
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Delea M, Massara LS, Espeche LD, Bidondo MP, Barbero P, Oliveri J, Brun P, Fabro M, Galain M, Fernández CS, Taboas M, Bruque CD, Kolomenski JE, Izquierdo A, Berenstein A, Cosentino V, Martinoli C, Vilas M, Rittler M, Mendez R, Furforo L, Liascovich R, Groisman B, Rozental S, Dain L. Genetic Analysis Algorithm for the Study of Patients with Multiple Congenital Anomalies and Isolated Congenital Heart Disease. Genes (Basel) 2022; 13:1172. [PMID: 35885957 PMCID: PMC9317700 DOI: 10.3390/genes13071172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/16/2022] [Accepted: 06/27/2022] [Indexed: 11/20/2022] Open
Abstract
Congenital anomalies (CA) affect 3-5% of newborns, representing the second-leading cause of infant mortality in Argentina. Multiple congenital anomalies (MCA) have a prevalence of 2.26/1000 births in newborns, while congenital heart diseases (CHD) are the most frequent CA with a prevalence of 4.06/1000 births. The aim of this study was to identify the genetic causes in Argentinian patients with MCA and isolated CHD. We recruited 366 patients (172 with MCA and 194 with isolated CHD) born between June 2015 and August 2019 at public hospitals. DNA from peripheral blood was obtained from all patients, while karyotyping was performed in patients with MCA. Samples from patients presenting conotruncal CHD or DiGeorge phenotype (n = 137) were studied using MLPA. Ninety-three samples were studied by array-CGH and 18 by targeted or exome next-generation sequencing (NGS). A total of 240 patients were successfully studied using at least one technique. Cytogenetic abnormalities were observed in 13 patients, while 18 had clinically relevant imbalances detected by array-CGH. After MLPA, 26 patients presented 22q11 deletions or duplications and one presented a TBX1 gene deletion. Following NGS analysis, 12 patients presented pathogenic or likely pathogenic genetic variants, five of them, found in KAT6B, SHH, MYH11, MYH7 and EP300 genes, are novel. Using an algorithm that combines molecular techniques with clinical and genetic assessment, we determined the genetic contribution in 27.5% of the analyzed patients.
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Affiliation(s)
- Marisol Delea
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Lucia S. Massara
- Hospital de Alta Complejidad en Red El Cruce—SAMIC. Av. Calchaquí 5401, Florencio Varela 1888, Argentina; (L.S.M.); (J.O.); (P.B.)
| | - Lucia D. Espeche
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - María Paz Bidondo
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
- Unidad Académica de Histologia, Embriologia, Biologia Celular y Genética, Facultad de Medicina UBA, Paraguay 2155, Buenos Aires 1121, Argentina
| | - Pablo Barbero
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Jaen Oliveri
- Hospital de Alta Complejidad en Red El Cruce—SAMIC. Av. Calchaquí 5401, Florencio Varela 1888, Argentina; (L.S.M.); (J.O.); (P.B.)
| | - Paloma Brun
- Hospital de Alta Complejidad en Red El Cruce—SAMIC. Av. Calchaquí 5401, Florencio Varela 1888, Argentina; (L.S.M.); (J.O.); (P.B.)
| | - Mónica Fabro
- Novagen, Viamonte 1430, Buenos Aires 1055, Argentina; (M.F.); (M.G.); (C.S.F.)
| | - Micaela Galain
- Novagen, Viamonte 1430, Buenos Aires 1055, Argentina; (M.F.); (M.G.); (C.S.F.)
| | | | - Melisa Taboas
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Carlos D. Bruque
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Jorge E. Kolomenski
- Departamento de Fisiología, Biología Molecular y Celular, Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Facultad de Ciencias Exactas y Naturales-UBA, Intendente Güiraldes 2160, Buenos Aires 1428, Argentina;
| | - Agustín Izquierdo
- Centro de Investigaciones Endocrinológicas “Dr. César Bergadá”. Gallo 1330, Buenos Aires 1425, Argentina;
| | - Ariel Berenstein
- Instituto Multidisciplinario de Investigaciones en Patologías Pediátricas, Gallo 1330, Buenos Aires 1425, Argentina;
| | - Viviana Cosentino
- Hospital Interzonal General de Agudos Luisa Cravenna de Gandulfo, Balcarce 351, Lomas de Zamora 1832, Argentina;
| | - Celeste Martinoli
- Hospital Sor Maria Ludovica, Calle 14 1631, La Plata 1904, Argentina;
| | - Mariana Vilas
- Hospital Materno Infantil Ramón Sardá, Esteban de Luca 2151, Buenos Aires 1246, Argentina; (M.V.); (M.R.); (L.F.)
| | - Mónica Rittler
- Hospital Materno Infantil Ramón Sardá, Esteban de Luca 2151, Buenos Aires 1246, Argentina; (M.V.); (M.R.); (L.F.)
| | - Rodrigo Mendez
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Lilian Furforo
- Hospital Materno Infantil Ramón Sardá, Esteban de Luca 2151, Buenos Aires 1246, Argentina; (M.V.); (M.R.); (L.F.)
| | - Rosa Liascovich
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Boris Groisman
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Sandra Rozental
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
| | - Liliana Dain
- Centro Nacional de Genética Médica “Dr. Eduardo Castilla”- ANLIS “Dr. Carlos G. Malbrán”, Avda. Las Heras 2670, Buenos Aires 1425, Argentina; (M.D.); (L.D.E.); (M.P.B.); (P.B.); (M.T.); (C.D.B.); (R.M.); (R.L.); (B.G.); (S.R.)
- Departamento de Fisiología, Biología Molecular y Celular, Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Facultad de Ciencias Exactas y Naturales-UBA, Intendente Güiraldes 2160, Buenos Aires 1428, Argentina;
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24
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DeCasien AR, Trujillo AE, Janiak MC, Harshaw EP, Caes ZN, Galindo GA, Petersen RM, Higham JP. Equivocal evidence for a link between megalencephaly-related genes and primate brain size evolution. Sci Rep 2022; 12:10902. [PMID: 35764790 PMCID: PMC9239989 DOI: 10.1038/s41598-022-12953-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/19/2022] [Indexed: 11/08/2022] Open
Abstract
A large brain is a defining feature of modern humans, and much work has been dedicated to exploring the molecular underpinnings of this trait. Although numerous studies have focused on genes associated with human microcephaly, no studies have explicitly focused on genes associated with megalencephaly. Here, we investigate 16 candidate genes that have been linked to megalencephaly to determine if: (1) megalencephaly-associated genes evolved under positive selection across primates; and (2) selection pressure on megalencephaly-associated genes is linked to primate brain size. We found evidence for positive selection for only one gene, OFD1, with 1.8% of the sites estimated to have dN/dS values greater than 1; however, we did not detect a relationship between selection pressure on this gene and brain size across species, suggesting that selection for changes to non-brain size traits drove evolutionary changes to this gene. In fact, our primary analyses did not identify significant associations between selection pressure and brain size for any candidate genes. While we did detect positive associations for two genes (GPC3 and TBC1D7) when two phyletic dwarfs (i.e., species that underwent recent evolutionary decreases in brain size) were excluded, these associations did not withstand FDR correction. Overall, these results suggest that sequence alterations to megalencephaly-associated genes may have played little to no role in primate brain size evolution, possibly due to the highly pleiotropic effects of these genes. Future comparative studies of gene expression levels may provide further insights. This study enhances our understanding of the genetic underpinnings of brain size evolution in primates and identifies candidate genes that merit further exploration.
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Affiliation(s)
- Alex R DeCasien
- Department of Anthropology, New York University, New York, USA.
- New York Consortium in Evolutionary Primatology (NYCEP), New York, USA.
- Section on Developmental Neurogenomics, National Institute of Mental Health (NIMH), Bethesda, USA.
| | - Amber E Trujillo
- Department of Anthropology, New York University, New York, USA
- New York Consortium in Evolutionary Primatology (NYCEP), New York, USA
| | - Mareike C Janiak
- School of Science, Engineering and Environment, University of Salford, Salford, UK
- Department of Anthropology, Rutgers University, New Brunswick, USA
| | - Etta P Harshaw
- Department of Art History, University of Southern California, Los Angeles, USA
- Eleanor Roosevelt High School, New York, USA
| | - Zosia N Caes
- Department of Chemistry, Yale University, New Haven, USA
- Columbia Secondary School for Math, Science, and Engineering, New York, USA
| | | | - Rachel M Petersen
- Department of Anthropology, New York University, New York, USA
- New York Consortium in Evolutionary Primatology (NYCEP), New York, USA
- Department of Biological Sciences, Vanderbilt University, Nashville, USA
| | - James P Higham
- Department of Anthropology, New York University, New York, USA
- New York Consortium in Evolutionary Primatology (NYCEP), New York, USA
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25
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van Gemert LA, Leen WG, Draaisma JM, Roeleveld N, Willemsen MA. Head circumference in glucose transporter 1 deficiency syndrome: Normal for individuals, abnormal as a group. Eur J Paediatr Neurol 2022; 38:73-76. [PMID: 35500464 DOI: 10.1016/j.ejpn.2022.04.005] [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: 12/23/2021] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 10/18/2022]
Abstract
In the literature, microcephaly is considered as part of the classical phenotype of glucose transporter 1 deficiency syndrome (GLUT1DS), and previous cohort studies reported a prevalence of microcephaly of around 50%. In our clinical experience, however, only very few patients with GLUT1DS appear to have microcephaly. Therefore, we conducted an observational study among a large cohort of Dutch patients with GLUT1DS to investigate the prevalence of microcephaly, defined as < 2 standard deviations (SD) below the mean. We analysed the head circumference of 54 patients and found a prevalence of microcephaly at last known measurement of 6.5%. Notably, none of the patients had a head circumference < -3 SD. However, we learned that 75.9% of the patients had a head circumference below 0 SD. This study shows that microcephaly occurs less often than previously thought in patients with GLUT1DS, and that primary or secondary microcephaly does not seem to be a sign for clinicians to suspect GLUT1DS. As a group, however, patients with GLUT1DS seem to have decreased head circumference compared to healthy individuals and as such, our study suggests that early brain development and brain growth may be compromised in GLUT1DS.
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Affiliation(s)
- Loes A van Gemert
- Department of Pediatric Neurology, Amalia Children's Hospital, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, the Netherlands.
| | - Wilhelmina G Leen
- Department of Neurology, Canisius Wilhelmina Hospital, Weg Door Jonkerbos 100, 6532, SZ, Nijmegen, the Netherlands.
| | - Jos M Draaisma
- Department of General Pediatrics, Amalia Children's Hospital, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, the Netherlands.
| | - Nel Roeleveld
- Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, the Netherlands.
| | - Michèl A Willemsen
- Department of Pediatric Neurology, Amalia Children's Hospital, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, the Netherlands; Donders Institute for Brain, Cognition and Behaviour, Montessorilaan 3, 6525, HR, Nijmegen, the Netherlands.
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26
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Malinger G, Krajden KH, Brinbaum R, Tsur E, Berger R, Shohat M. Prenatal diagnosis of microcephaly as shown by plateauing of head circumference growth during the 3 rd trimester in a fetus with a CCND2 inverse growth variant. Prenat Diagn 2022; 42:1343-1345. [PMID: 35437818 PMCID: PMC9545358 DOI: 10.1002/pd.6148] [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: 01/25/2022] [Revised: 03/23/2022] [Accepted: 04/09/2022] [Indexed: 11/16/2022]
Abstract
What's already known?Variants in CCND2 gene are known to cause syndromic macrocephaly. Recently inverse growth proximal variants were described in five individuals with microcephaly.
What does this study add?CCND2 loss of function distal variants can cause fetal microcephaly.
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Affiliation(s)
- Gustavo Malinger
- Division of Ultrasound in Obstetrics & Gynecology, Lis Maternity and Women's Hospital, Tel Aviv Sourasky Medical Center, Israel. Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Tel Aviv, Israel
| | - Karina Haratz Krajden
- Division of Ultrasound in Obstetrics & Gynecology, Lis Maternity and Women's Hospital, Tel Aviv Sourasky Medical Center, Israel. Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Tel Aviv, Israel
| | - Roee Brinbaum
- Division of Ultrasound in Obstetrics & Gynecology, Lis Maternity and Women's Hospital, Tel Aviv Sourasky Medical Center, Israel. Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Tel Aviv, Israel
| | - Erez Tsur
- Maccabi Genetic Institute & Bioinformatics Unit. Sheba Cancer Research Center, Ramat Gan, Israel. Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Racheli Berger
- Maccabi Genetic Institute & Bioinformatics Unit. Sheba Cancer Research Center, Ramat Gan, Israel. Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Mordechai Shohat
- Maccabi Genetic Institute & Bioinformatics Unit. Sheba Cancer Research Center, Ramat Gan, Israel. Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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27
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Schmidt JK, Jones KM, Van Vleck T, Emborg ME. Modeling genetic diseases in nonhuman primates through embryonic and germline modification: Considerations and challenges. Sci Transl Med 2022; 14:eabf4879. [PMID: 35235338 PMCID: PMC9373237 DOI: 10.1126/scitranslmed.abf4879] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Genetic modification of the embryo or germ line of nonhuman primates is envisioned as a method to develop improved models of human disease, yet the promise of such animal models remains unfulfilled. Here, we discuss current methods and their limitations for producing nonhuman primate genetic models that faithfully genocopy and phenocopy human disease. We reflect on how to ethically maximize the translational relevance of such models in the search for new therapeutic strategies to treat human disease.
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Affiliation(s)
- Jenna K. Schmidt
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Kathryn M. Jones
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Trevor Van Vleck
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Marina E. Emborg
- Wisconsin National Primate Research Center, University of Wisconsin-Madison, Madison, WI, USA
- Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, USA
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28
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Endosomal trafficking defects alter neural progenitor proliferation and cause microcephaly. Nat Commun 2022; 13:16. [PMID: 35013230 PMCID: PMC8748540 DOI: 10.1038/s41467-021-27705-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 11/30/2021] [Indexed: 11/14/2022] Open
Abstract
Primary microcephaly and megalencephaly are severe brain malformations defined by reduced and increased brain size, respectively. Whether these two pathologies arise from related alterations at the molecular level is unclear. Microcephaly has been largely associated with centrosomal defects, leading to cell death. Here, we investigate the consequences of WDR81 loss of function, which causes severe microcephaly in patients. We show that WDR81 regulates endosomal trafficking of EGFR and that loss of function leads to reduced MAP kinase pathway activation. Mouse radial glial progenitor cells knocked-out for WDR81 exhibit reduced proliferation rate, subsequently leading to reduced brain size. These proliferation defects are rescued in vivo by expressing a megalencephaly-causing mutant form of Cyclin D2. Our results identify the endosomal machinery as an important regulator of proliferation rates and brain growth, demonstrating that microcephaly and megalencephaly can be caused by opposite effects on the proliferation rate of radial glial progenitors. Mutations in the human WDR81 gene result in severe microcephaly. Carpentieri et al. show that mutation of WDR81, a gene coding for an endosomal regulator, alters intracellular processing of the EGF receptor, leading to reduced proliferation rates of neuronal progenitors and to microcephaly.
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29
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Bushman ET, Blanchard C, Sinkey RG, Harris S, Casey B, Tita AT, Ramani M, Harper LM. Head Circumference within the Normal Range and Neurodevelopmental Outcomes in Preterm Infants. Am J Perinatol 2021; 38:1459-1464. [PMID: 34327687 DOI: 10.1055/s-0041-1732460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE We sought to determine if variation in head circumference (HC) within the range of normal (5th-10th and 90th-95th percentile) is associated with poor neurodevelopmental outcomes (NDO), which defined as mild or moderate delay by Bayley II psychometrics (BSID-II). STUDY DESIGN This is a secondary analysis of a randomized controlled trial assessing the benefits of magnesium for the prevention of cerebral palsy. Fetuses with a normal HC at birth defined as within 5th to 95th percentile were included. NDO were assessed at age 2 with BSID-II. Moderate delay was defined as a score <70 and mild delay as <85. HC was classified as small normal (5th-10th percentile), normal (10th-90th percentile), and large normal (90th-95th percentile). Logistic regression models adjusted for confounding. Linear regression models estimated the impact for every 1 cm of change in HC. RESULTS Of 1,236 included infants, 111 (8%) had small normal HC; 1,058 (85%) had normal HC; and 67 (5%) had large normal HC. Baseline characteristics were similar between groups. There was no association with changes in HC within the range of normal and developmental indices. When considered as a continuous variable, every 1 cm increase in HC was also not associated with a significant change in developmental indices. CONCLUSION Within the normal range (5th-95th percentile), changes in HC did not correlate with changes in NDO at 2 years as measured by Bayley II scales. KEY POINTS · It is unknown if variations in normal HC are associated with poor neurodevelopmental outcomes.. · Alterations in HC within the range of normal (5th-95th percentile) are not associated with adverse NDO.. · When considered as a continuous variable, a 1 cm increase in HC is not associated with adverse NDO.. · Changes in HC within the range of normal do not appear to be a pathologic change altering NDO..
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Affiliation(s)
- Elisa T Bushman
- Center for Women's Reproductive Health, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Christina Blanchard
- Center for Women's Reproductive Health, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Rachael G Sinkey
- Center for Women's Reproductive Health, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Stacy Harris
- Center for Women's Reproductive Health, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Brian Casey
- Center for Women's Reproductive Health, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Alan T Tita
- Center for Women's Reproductive Health, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Manimaran Ramani
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, Alabama.,Division of Neonatology, Children's of Alabama, Birmingham, Alabama
| | - Lorie M Harper
- Center for Women's Reproductive Health, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, Alabama
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30
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A Mathematical Model to Predict Human Microcephaly. J Craniofac Surg 2021; 32:2223-2225. [PMID: 34516060 DOI: 10.1097/scs.0000000000007552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Microcephaly (MiC) is defined as head circumference (HC) dimensions smaller than the normal standards. OBJECTIVE To detect MiC with a mathematical formula. MATERIALS AND METHODS The 0 to 5 years head HC percentile data for girls and boys reported by the World Health Organization were used. To assess early childhood, these growth standards are available on its website for international use. Mathematical formulas best estimating the 3rd percentile curves were defined using basic regression analysis methods. RESULTS The mathematical models obtained as a result of logarithmic regression analysis with the highest coefficient of determination values (R2 = 0.991 for girls; R2 = 0.991 for boys) were identified as the best model. The formulas of HC = 34.025 + 3.283 ∗ ln (age as months), and HC = 35.475 + 3.14 ∗ ln (age as months) were determined for girls and boys, respectively. A limitation of these formulas is that they do not provide the HC at birth (ln (0) = undetermined). CONCLUSION Microcephaly can be estimated using the mathematical formulas with a calculator without using percentile scales, mobile applications, software, or the Internet.
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31
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Understanding microcephaly through the study of centrosome regulation in Drosophila neural stem cells. Biochem Soc Trans 2021; 48:2101-2115. [PMID: 32897294 DOI: 10.1042/bst20200261] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 08/07/2020] [Accepted: 08/11/2020] [Indexed: 12/30/2022]
Abstract
Microcephaly is a rare, yet devastating, neurodevelopmental condition caused by genetic or environmental insults, such as the Zika virus infection. Microcephaly manifests with a severely reduced head circumference. Among the known heritable microcephaly genes, a significant proportion are annotated with centrosome-related ontologies. Centrosomes are microtubule-organizing centers, and they play fundamental roles in the proliferation of the neuronal progenitors, the neural stem cells (NSCs), which undergo repeated rounds of asymmetric cell division to drive neurogenesis and brain development. Many of the genes, pathways, and developmental paradigms that dictate NSC development in humans are conserved in Drosophila melanogaster. As such, studies of Drosophila NSCs lend invaluable insights into centrosome function within NSCs and help inform the pathophysiology of human microcephaly. This mini-review will briefly survey causative links between deregulated centrosome functions and microcephaly with particular emphasis on insights learned from Drosophila NSCs.
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32
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Guo Z, Chen M, Chao Y, Cai C, Liu L, Zhao L, Li L, Bai QR, Xu Y, Niu W, Shi L, Bi Y, Ren D, Yuan F, Shi S, Zeng Q, Han K, Shi Y, Bian S, He G. RGCC balances self-renewal and neuronal differentiation of neural stem cells in the developing mammalian neocortex. EMBO Rep 2021; 22:e51781. [PMID: 34323349 DOI: 10.15252/embr.202051781] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 06/14/2021] [Accepted: 06/16/2021] [Indexed: 11/09/2022] Open
Abstract
During neocortical development, neural stem cells (NSCs) divide symmetrically to self-renew at the early stage and then divide asymmetrically to generate post-mitotic neurons. The molecular mechanisms regulating the balance between NSC self-renewal and neurogenesis are not fully understood. Using mouse in utero electroporation (IUE) technique and in vitro human NSC differentiation models including cerebral organoids (hCOs), we show here that regulator of cell cycle (RGCC) modulates NSC self-renewal and neuronal differentiation by affecting cell cycle regulation and spindle orientation. RGCC deficiency hampers normal cell cycle process and dysregulates the mitotic spindle, thus driving more cells to divide asymmetrically. These modulations diminish the NSC population and cause NSC pre-differentiation that eventually leads to brain developmental malformation in hCOs. We further show that RGCC might regulate NSC spindle orientation by affecting the organization of centrosome and microtubules. Our results demonstrate that RGCC is essential to maintain the NSC pool during cortical development and suggest that RGCC defects could have etiological roles in human brain malformations.
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Affiliation(s)
- Zhenming Guo
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Mengxia Chen
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Yiming Chao
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Chunhai Cai
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Liangjie Liu
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Li Zhao
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Linbo Li
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Qing-Ran Bai
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Yanxin Xu
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Weibo Niu
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Lei Shi
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Bi
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Decheng Ren
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Fan Yuan
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Shuyue Shi
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Qian Zeng
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Ke Han
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Yi Shi
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
| | - Shan Bian
- Institute for Regenerative Medicine, Shanghai East Hospital, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Guang He
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Psychotic Disorders, and Brain Science and Technology Research Center, Shanghai Jiao Tong University, Shanghai, China
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Serru M, Marechal B, Kober T, Ribier L, Sembely Taveau C, Sirinelli D, Cottier JP, Morel B. Improving diagnosis accuracy of brain volume abnormalities during childhood with an automated MP2RAGE-based MRI brain segmentation. J Neuroradiol 2021; 48:259-265. [DOI: 10.1016/j.neurad.2019.06.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/04/2019] [Accepted: 06/07/2019] [Indexed: 11/30/2022]
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Rau A, Demerath T, Kremers N, Eckenweiler M, von der Warth R, Urbach H. Measuring the Head Circumference on MRI in Children: an Interrater Study. Clin Neuroradiol 2021; 31:1021-1027. [PMID: 34019101 PMCID: PMC8648705 DOI: 10.1007/s00062-021-01019-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/11/2021] [Indexed: 11/28/2022]
Abstract
Purpose The head circumference is typically used as a surrogate parameter for the development of the central nervous system and intracranial structures and is an important clinical parameter in neuropediatrics. As magnetic resonance images (MRI) can be freely zoomed, visual analysis of the head size often relies on impressions, such as the craniofacial ratio or a simplified gyral pattern. Aim of this study was to validate an MRI-based method to measure the head circumference. Methods Head circumferences of 85 children (41 microcephalies, 22 macrocephalies and 22 normal controls; 47 male, mean age 3.22 ± 2.45 years, range 0.19–10.42 years) were retrospectively measured using sagittal 3D-T1w (MPRAGE) data sets. Three readers independently placed an ovoid region of interest in an axial plane starting from the supraorbital bulge and covering the largest supra-auricular head circumference. Clinical measurements of the head circumference taken within an acceptable period served for comparative purposes. Reliability was assessed by calculating the total error of measurement (TEM) and the intraclass correlation coefficient (ICC). Results A close correlation was found between MRI-based and clinical measurements. The interrater reliability was excellent (ICC 0.985, 95% confidence interval 0.952–0.993). Absolute TEM ranged from 0.47–0.75, resulting in relative TEM ranging from 1.0–1.6%. Thus, TEMs were classified as acceptable. The mean accuracy of MRI-based measurements was high at 0.94. Conclusion The head circumference can be reliably determined with a simple measurement on 3D sequences using multiplanar reformations. This approach may help to diagnose microcephaly and macrocephaly, especially when the head circumference is not reported by the referring physician.
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Affiliation(s)
- Alexander Rau
- Dept. of Neuroradiology, University Medical Center Freiburg, Freiburg, Germany.
| | - Theo Demerath
- Dept. of Neuroradiology, University Medical Center Freiburg, Freiburg, Germany
| | - Nico Kremers
- Dept. of Neuroradiology, University Medical Center Freiburg, Freiburg, Germany
| | - Matthias Eckenweiler
- Dept. of Neuropediatrics and Muscle Disorders, University Medical Center Freiburg, Freiburg, Germany
| | - Rieka von der Warth
- Institute of Medical Biometry and Statistics, Section of Health Care Research and Rehabilitation Research, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Horst Urbach
- Dept. of Neuroradiology, University Medical Center Freiburg, Freiburg, Germany
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Prieto-Colomina A, Fernández V, Chinnappa K, Borrell V. MiRNAs in early brain development and pediatric cancer: At the intersection between healthy and diseased embryonic development. Bioessays 2021; 43:e2100073. [PMID: 33998002 DOI: 10.1002/bies.202100073] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 12/15/2022]
Abstract
The size and organization of the brain are determined by the activity of progenitor cells early in development. Key mechanisms regulating progenitor cell biology involve miRNAs. These small noncoding RNA molecules bind mRNAs with high specificity, controlling their abundance and expression. The role of miRNAs in brain development has been studied extensively, but their involvement at early stages remained unknown until recently. Here, recent findings showing the important role of miRNAs in the earliest phases of brain development are reviewed, and it is discussed how loss of specific miRNAs leads to pathological conditions, particularly adult and pediatric brain tumors. Let-7 miRNA downregulation and the initiation of embryonal tumors with multilayered rosettes (ETMR), a novel link recently discovered by the laboratory, are focused upon. Finally, it is discussed how miRNAs may be used for the diagnosis and therapeutic treatment of pediatric brain tumors, with the hope of improving the prognosis of these devastating diseases.
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Affiliation(s)
- Anna Prieto-Colomina
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas & Universidad Miguel Hernández, Sant Joan d'Alacant, Spain
| | - Virginia Fernández
- Neurobiology of miRNA, Fondazione Istituto Italiano di Tecnologia (IIT), Genoa, Italy
| | - Kaviya Chinnappa
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas & Universidad Miguel Hernández, Sant Joan d'Alacant, Spain
| | - Víctor Borrell
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas & Universidad Miguel Hernández, Sant Joan d'Alacant, Spain
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Catusi I, Garzo M, Capra AP, Briuglia S, Baldo C, Canevini MP, Cantone R, Elia F, Forzano F, Galesi O, Grosso E, Malacarne M, Peron A, Romano C, Saccani M, Larizza L, Recalcati MP. 8p23.2-pter Microdeletions: Seven New Cases Narrowing the Candidate Region and Review of the Literature. Genes (Basel) 2021; 12:genes12050652. [PMID: 33925474 PMCID: PMC8146486 DOI: 10.3390/genes12050652] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 12/11/2022] Open
Abstract
To date only five patients with 8p23.2-pter microdeletions manifesting a mild-to-moderate cognitive impairment and/or developmental delay, dysmorphisms and neurobehavioral issues were reported. The smallest microdeletion described by Wu in 2010 suggested a critical region (CR) of 2.1 Mb including several genes, out of which FBXO25, DLGAP2, CLN8, ARHGEF10 and MYOM2 are the main candidates. Here we present seven additional patients with 8p23.2-pter microdeletions, ranging from 71.79 kb to 4.55 Mb. The review of five previously reported and nine Decipher patients confirmed the association of the CR with a variable clinical phenotype characterized by intellectual disability/developmental delay, including language and speech delay and/or motor impairment, behavioral anomalies, autism spectrum disorder, dysmorphisms, microcephaly, fingers/toes anomalies and epilepsy. Genotype analysis allowed to narrow down the 8p23.3 candidate region which includes only DLGAP2, CLN8 and ARHGEF10 genes, accounting for the main signs of the broad clinical phenotype associated to 8p23.2-pter microdeletions. This region is more restricted compared to the previously proposed CR. Overall, our data favor the hypothesis that DLGAP2 is the actual strongest candidate for neurodevelopmental/behavioral phenotypes. Additional patients will be necessary to validate the pathogenic role of DLGAP2 and better define how the two contiguous genes, ARHGEF10 and CLN8, might contribute to the clinical phenotype.
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Affiliation(s)
- Ilaria Catusi
- Istituto Auxologico Italiano, IRCCS, Laboratory of Medical Cytogenetics and Molecular Genetics, 20145 Milan, Italy
| | - Maria Garzo
- Istituto Auxologico Italiano, IRCCS, Laboratory of Medical Cytogenetics and Molecular Genetics, 20145 Milan, Italy
| | - Anna Paola Capra
- Department of Biomedical, Dental, Morphological and Functional Imaging Sciences, University of Messina, 98100 Messina, Italy
| | - Silvana Briuglia
- Department of Biomedical, Dental, Morphological and Functional Imaging Sciences, University of Messina, 98100 Messina, Italy
| | - Chiara Baldo
- UOC Laboratorio di Genetica Umana, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
| | - Maria Paola Canevini
- Child Neuropsychiatry Unit-Epilepsy Center, Department of Health Sciences, ASST Santi Paolo e Carlo, San Paolo Hospital, Università Degli Studi di Milano, 20142 Milan, Italy
| | - Rachele Cantone
- Medical Genetics Unit, Città della Salute e della Scienza University Hospital, 10126 Turin, Italy
| | - Flaviana Elia
- Unit of Psychology, Oasi Research Institute-IRCCS, 94018 Troina, Italy
| | - Francesca Forzano
- Clinical Genetics Department, Guy's & St Thomas' NHS Foundation Trust, London SE1 9RT, UK
| | - Ornella Galesi
- Laboratory of Medical Genetics, Oasi Research Institute-IRCCS, 94018 Troina, Italy
| | - Enrico Grosso
- Medical Genetics Unit, Città della Salute e della Scienza University Hospital, 10126 Turin, Italy
| | - Michela Malacarne
- UOC Laboratorio di Genetica Umana, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
| | - Angela Peron
- Child Neuropsychiatry Unit-Epilepsy Center, Department of Health Sciences, ASST Santi Paolo e Carlo, San Paolo Hospital, Università Degli Studi di Milano, 20142 Milan, Italy
- Human Pathology and Medical Genetics, ASST Santi Paolo e Carlo, San Paolo Hospital, 20142 Milan, Italy
- Division of Medical Genetics, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
| | - Corrado Romano
- Unit of Pediatrics and Medical Genetics, Oasi Research Institute-IRCCS, 94018 Troina, Italy
| | - Monica Saccani
- Child Neuropsychiatry Unit-Epilepsy Center, Department of Health Sciences, ASST Santi Paolo e Carlo, San Paolo Hospital, Università Degli Studi di Milano, 20142 Milan, Italy
| | - Lidia Larizza
- Istituto Auxologico Italiano, IRCCS, Laboratory of Medical Cytogenetics and Molecular Genetics, 20145 Milan, Italy
| | - Maria Paola Recalcati
- Istituto Auxologico Italiano, IRCCS, Laboratory of Medical Cytogenetics and Molecular Genetics, 20145 Milan, Italy
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Is the ZIKV Congenital Syndrome and Microcephaly Due to Syndemism with Latent Virus Coinfection? Viruses 2021; 13:v13040669. [PMID: 33924398 PMCID: PMC8069280 DOI: 10.3390/v13040669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/02/2021] [Accepted: 04/10/2021] [Indexed: 01/04/2023] Open
Abstract
The emergence of the Zika virus (ZIKV) mirrors its evolutionary nature and, thus, its ability to grow in diversity or complexity (i.e., related to genome, host response, environment changes, tropism, and pathogenicity), leading to it recently joining the circle of closed congenital pathogens. The causal relation of ZIKV to microcephaly is still a much-debated issue. The identification of outbreak foci being in certain endemic urban areas characterized by a high-density population emphasizes that mixed infections might spearhead the recent appearance of a wide range of diseases that were initially attributed to ZIKV. Globally, such coinfections may have both positive and negative effects on viral replication, tropism, host response, and the viral genome. In other words, the possibility of coinfection may necessitate revisiting what is considered to be known regarding the pathogenesis and epidemiology of ZIKV diseases. ZIKV viral coinfections are already being reported with other arboviruses (e.g., chikungunya virus (CHIKV) and dengue virus (DENV)) as well as congenital pathogens (e.g., human immunodeficiency virus (HIV) and cytomegalovirus (HCMV)). However, descriptions of human latent viruses and their impacts on ZIKV disease outcomes in hosts are currently lacking. This review proposes to select some interesting human latent viruses (i.e., herpes simplex virus 2 (HSV-2), Epstein-Barr virus (EBV), human herpesvirus 6 (HHV-6), human parvovirus B19 (B19V), and human papillomavirus (HPV)), whose virological features and co-exposition with ZIKV may provide evidence of the syndemism process, shedding some light on the emergence of the ZIKV-induced global congenital syndrome in South America.
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Sato T, Ito T, Handa H. Cereblon-Based Small-Molecule Compounds to Control Neural Stem Cell Proliferation in Regenerative Medicine. Front Cell Dev Biol 2021; 9:629326. [PMID: 33777938 PMCID: PMC7990905 DOI: 10.3389/fcell.2021.629326] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 02/15/2021] [Indexed: 11/19/2022] Open
Abstract
Thalidomide, a sedative drug that was once excluded from the market owing to its teratogenic properties, was later found to be effective in treating multiple myeloma. We had previously demonstrated that cereblon (CRBN) is the target of thalidomide embryopathy and acts as a substrate receptor for the E3 ubiquitin ligase complex, Cullin-Ring ligase 4 (CRL4CRBN) in zebrafish and chicks. CRBN was originally identified as a gene responsible for mild intellectual disability in humans. Fetuses exposed to thalidomide in early pregnancy were at risk of neurodevelopmental disorders such as autism, suggesting that CRBN is involved in prenatal brain development. Recently, we found that CRBN controls the proliferation of neural stem cells in the developing zebrafish brain, leading to changes in brain size. Our findings imply that CRBN is involved in neural stem cell growth in humans. Accumulating evidence shows that CRBN is essential not only for the teratogenic effects but also for the therapeutic effects of thalidomide. This review summarizes recent progress in thalidomide and CRBN research, focusing on the teratogenic and therapeutic effects. Investigation of the molecular mechanisms underlying the therapeutic effects of thalidomide and its derivatives, CRBN E3 ligase modulators (CELMoDs), reveals that these modulators provide CRBN the ability to recognize neosubstrates depending on their structure. Understanding the therapeutic effects leads to the development of a novel technology called CRBN-based proteolysis-targeting chimeras (PROTACs) for target protein knockdown. These studies raise the possibility that CRBN-based small-molecule compounds regulating the proliferation of neural stem cells may be developed for application in regenerative medicine.
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Affiliation(s)
- Tomomi Sato
- Department of Chemical Biology, Tokyo Medical University, Tokyo, Japan.,Department of Anatomy, School of Medicine, Saitama Medical University, Saitama, Japan.,Department of Obstetrics and Gynecology, School of Medicine, Saitama Medical University, Saitama, Japan
| | - Takumi Ito
- Department of Chemical Biology, Tokyo Medical University, Tokyo, Japan
| | - Hiroshi Handa
- Department of Chemical Biology, Tokyo Medical University, Tokyo, Japan
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Abstract
Mitochondria are signaling hubs responsible for the generation of energy through oxidative phosphorylation, the production of key metabolites that serve the bioenergetic and biosynthetic needs of the cell, calcium (Ca2+) buffering and the initiation/execution of apoptosis. The ability of mitochondria to coordinate this myriad of functions is achieved through the exquisite regulation of fundamental dynamic properties, including remodeling of the mitochondrial network via fission and fusion, motility and mitophagy. In this Review, we summarize the current understanding of the mechanisms by which these dynamic properties of the mitochondria support mitochondrial function, review their impact on human cortical development and highlight areas in need of further research.
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Affiliation(s)
- Tierney Baum
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Vivian Gama
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA
- Vanderbilt Center for Stem Cell Biology, Vanderbilt University, Nashville, TN 37232, USA
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37232, USA
- Vanderbilt Ingram Cancer Center, Vanderbilt University, Nashville, TN 37232, USA
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40
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Congenital Malformations in Sea Turtles: Puzzling Interplay between Genes and Environment. Animals (Basel) 2021; 11:ani11020444. [PMID: 33567785 PMCID: PMC7915190 DOI: 10.3390/ani11020444] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 12/28/2022] Open
Abstract
Simple Summary Congenital malformations can lead to embryonic mortality in many species, and sea turtles are no exception. Genetic and/or environmental alterations occur during early development in the embryo, and may produce aberrant phenotypes, many of which are incompatible with life. Causes of malformations are multifactorial; genetic factors may include mutations, chromosomal aberrations, and inbreeding effects, whereas non-genetic factors may include nutrition, hyperthermia, low moisture, radiation, and contamination. It is possible to monitor and control some of these factors (such as temperature and humidity) in nesting beaches, and toxic compounds in feeding areas, which can be transferred to the embryo through their lipophilic properties. In this review, we describe possible causes of different types of malformations observed in sea turtle embryos, as well as some actions that may help reduce embryonic mortality. Abstract The completion of embryonic development depends, in part, on the interplay between genetic factors and environmental conditions, and any alteration during development may affect embryonic genetic and epigenetic regulatory pathways leading to congenital malformations, which are mostly incompatible with life. Oviparous reptiles, such as sea turtles, that produce numerous eggs in a clutch that is buried on the beach provide an opportunity to study embryonic mortality associated with malformations that occur at different times during development, or that prevent the hatchling from emerging from the nest. In sea turtles, the presence of congenital malformations frequently leads to mortality. A few years ago, a detailed study was performed on external congenital malformations in three species of sea turtles from the Mexican Pacific and Caribbean coasts, the hawksbill turtle, Eretmochelys imbricata (n = 23,559 eggs), the green turtle, Chelonia mydas (n = 17,690 eggs), and the olive ridley, Lepidochelys olivacea (n = 20,257 eggs), finding 63 types of congenital malformations, of which 38 were new reports. Of the three species, the olive ridley showed a higher incidence of severe anomalies in the craniofacial region (49%), indicating alterations of early developmental pathways; however, several malformations were also observed in the body, including defects in the carapace (45%) and limbs (33%), as well as pigmentation disorders (20%), indicating that deviations occurred during the middle and later stages of development. Although intrinsic factors (i.e., genetic mutations or epigenetic modifications) are difficult to monitor in the field, some environmental factors (such as the incubation temperature, humidity, and probably the status of feeding areas) are, to some extent, less difficult to monitor and/or control. In this review, we describe the aetiology of different malformations observed in sea turtle embryos, and provide some actions that can reduce embryonic mortality.
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Guzik A, Perenc L, Drużbicki M, Podgórska-Bednarz J. Abnormal cranium development in children and adolescents affected by syndromes or diseases associated with neurodysfunction. Sci Rep 2021; 11:2908. [PMID: 33536524 PMCID: PMC7859185 DOI: 10.1038/s41598-021-82511-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 01/21/2021] [Indexed: 12/21/2022] Open
Abstract
Microcephaly and macrocephaly can be considered both cranial growth defects and clinical symptoms. There are two assessment criteria: one applied in dysmorphology and another conventionally used in clinical practice. The determination of which definition or under which paradigm the terminology should be applied can vary on a daily basis and from case to case as necessity dictates, as can defining the relationship between microcephaly or macrocephaly and syndromes or diseases associated with neurodysfunction. Thus, there is a need for standardization of the definition of microcephaly and macrocephaly. This study was designed to investigate associations between abnormal cranial development (head size) and diseases or syndromes linked to neurodysfunction based on essential data collected upon admission of patients to the Neurological Rehabilitation Ward for Children and Adolescents in Poland. The retrospective analysis involved 327 children and adolescents with medical conditions associated with neurodysfunction. Two assessment criteria were applied to identify subgroups of patients with microcephaly, normal head size, and macrocephaly: one system commonly used in clinical practice and another applied in dysmorphology. Based on the results, children and adolescents with syndromes or diseases associated with neurodysfunction present abnormal cranial development (head size), and microcephaly rarely co-occurs with neuromuscular disease. Macrocephaly frequently co-occurs with neural tube defects or neuromuscular diseases and rarely with cerebral palsy (p < 0.05); microcephaly frequently co-occurs with epilepsy and hypothyroidism (p < 0.001). Traditional classification facilitates the identification of a greater number of relationships and is therefore recommended for use in daily practice. There is a need to standardize the definition of microcephaly and macrocephaly and to include them in 'Human Phenotype Ontology' terms.
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Affiliation(s)
- Agnieszka Guzik
- Department of Physiotherapy, Institute of Health Sciences, College of Medical Sciences, University of Rzeszów, Rzeszów, Poland.
| | - Lidia Perenc
- Department of Physiotherapy, Institute of Health Sciences, College of Medical Sciences, University of Rzeszów, Rzeszów, Poland
| | - Mariusz Drużbicki
- Department of Physiotherapy, Institute of Health Sciences, College of Medical Sciences, University of Rzeszów, Rzeszów, Poland
| | - Justyna Podgórska-Bednarz
- Department of Physiotherapy, Institute of Health Sciences, College of Medical Sciences, University of Rzeszów, Rzeszów, Poland
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Accogli A, Geraldo AF, Piccolo G, Riva A, Scala M, Balagura G, Salpietro V, Madia F, Maghnie M, Zara F, Striano P, Tortora D, Severino M, Capra V. Diagnostic Approach to Macrocephaly in Children. Front Pediatr 2021; 9:794069. [PMID: 35096710 PMCID: PMC8795981 DOI: 10.3389/fped.2021.794069] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/02/2021] [Indexed: 01/19/2023] Open
Abstract
Macrocephaly affects up to 5% of the pediatric population and is defined as an abnormally large head with an occipitofrontal circumference (OFC) >2 standard deviations (SD) above the mean for a given age and sex. Taking into account that about 2-3% of the healthy population has an OFC between 2 and 3 SD, macrocephaly is considered as "clinically relevant" when OFC is above 3 SD. This implies the urgent need for a diagnostic workflow to use in the clinical setting to dissect the several causes of increased OFC, from the benign form of familial macrocephaly and the Benign enlargement of subarachnoid spaces (BESS) to many pathological conditions, including genetic disorders. Moreover, macrocephaly should be differentiated by megalencephaly (MEG), which refers exclusively to brain overgrowth, exceeding twice the SD (3SD-"clinically relevant" megalencephaly). While macrocephaly can be isolated and benign or may be the first indication of an underlying congenital, genetic, or acquired disorder, megalencephaly is most likely due to a genetic cause. Apart from the head size evaluation, a detailed family and personal history, neuroimaging, and a careful clinical evaluation are crucial to reach the correct diagnosis. In this review, we seek to underline the clinical aspects of macrocephaly and megalencephaly, emphasizing the main differential diagnosis with a major focus on common genetic disorders. We thus provide a clinico-radiological algorithm to guide pediatricians in the assessment of children with macrocephaly.
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Affiliation(s)
- Andrea Accogli
- Division of Medical Genetics, Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | - Ana Filipa Geraldo
- Diagnostic Neuroradiology Unit, Imaging Department, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Gianluca Piccolo
- Pediatric Neurology and Neuromuscular Diseases Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy
| | - Antonella Riva
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Marcello Scala
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Ganna Balagura
- Pediatric Neurology and Neuromuscular Diseases Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy
| | - Vincenzo Salpietro
- Pediatric Neurology and Neuromuscular Diseases Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Francesca Madia
- Pediatric Clinic and Endocrinology, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Mohamad Maghnie
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy.,Pediatric Clinic and Endocrinology, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Federico Zara
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy.,Medical Genetics Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy
| | - Pasquale Striano
- Pediatric Neurology and Neuromuscular Diseases Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy.,Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Domenico Tortora
- Neuroradiology Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | | | - Valeria Capra
- Medical Genetics Unit, IRCCS Giannina Gaslini Institute, Genoa, Italy
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Imaging phenotype correlation with molecular and molecular pathway defects in malformations of cortical development. Pediatr Radiol 2020; 50:1974-1987. [PMID: 33252763 DOI: 10.1007/s00247-020-04674-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 02/23/2020] [Accepted: 03/31/2020] [Indexed: 10/22/2022]
Abstract
The increase in understanding of molecular biology and recent advances in genetic testing have caused rapid growth in knowledge of genetic causes of malformations of cortical development. Imaging diagnosis of malformations of cortical development can be made prenatally in a large subset of fetuses based on the presence of specific deviations from the normal pattern of development, characteristic imaging features, and associated non-central-nervous-system (CNS) abnormalities. In this review the authors discuss the role of four key cell molecules/molecular pathways in corticogenesis that are frequently implicated in complex prenatally diagnosed malformations of cortical development. The authors also list the currently described genes causing defects in these molecules/molecular pathways when mutated, and the constellation of imaging findings resultant of such defects.
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Abnormal Head Size in Children and Adolescents with Congenital Nervous System Disorders or Neurological Syndromes with One or More Neurodysfunction Visible since Infancy. J Clin Med 2020; 9:jcm9113739. [PMID: 33233862 PMCID: PMC7699836 DOI: 10.3390/jcm9113739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 11/17/2020] [Indexed: 12/28/2022] Open
Abstract
The current study was designed to investigate co-occurrence of absolute/relative microcephaly, absolute/relative macrocephaly and congenital nervous system disorders or neurological syndromes with symptoms visible since infancy, based on fundamental data acquired during the admission procedure at a neurological rehabilitation ward for children and adolescents. The study applied a retrospective analysis of data collected during the hospitalization of 327 children and adolescents, aged 4-18 years, affected since infancy by congenital disorders of the nervous system and/or neurological syndromes associated with a minimum of one neurodysfunction. To identify subjects with absolute/relative microcephaly, absolute/relative macrocephaly in the group of children and adolescents, the adopted criteria took into account z-score values for head circumference (z-score hc) and head circumference index (z-score HCI). Dysmorphological (x+/-3s) and traditional (x+/-2s) criteria were adopted to diagnose developmental disorders of head size. Regardless of the adopted criteria, absolute macrocephaly often coexists with state after surgery of lumbar myelomeningocele and hydrocephalus, isolated hydrocephalus, hereditary motor and sensory polyneuropathy, and Becker's muscular dystrophy (p < 0.001, p = 0.002). Absolute macrocephaly is often associated with neural tube defects and neuromuscular disorders (p = 0.001, p = 0.001). Relative microcephaly often occurs with non-progressive encephalopathy (p = 0.017, p = 0.029). Absolute microcephaly, diagnosed on the basis of traditional criteria, is often associated with epilepsy (p = 0.043). In children and adolescents with congenital nervous system disorders or neurological syndromes with one or more neurodysfunction visible since infancy, there is variation in abnormal head size (statistically significant relationships and clinical implications were established). The definitions used allowed for the differentiation of abnormal head size.
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Garcia-Forn M, Boitnott A, Akpinar Z, De Rubeis S. Linking Autism Risk Genes to Disruption of Cortical Development. Cells 2020; 9:cells9112500. [PMID: 33218123 PMCID: PMC7698947 DOI: 10.3390/cells9112500] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/10/2020] [Accepted: 11/15/2020] [Indexed: 02/06/2023] Open
Abstract
Autism spectrum disorder (ASD) is a prevalent neurodevelopmental disorder characterized by impairments in social communication and social interaction, and the presence of repetitive behaviors and/or restricted interests. In the past few years, large-scale whole-exome sequencing and genome-wide association studies have made enormous progress in our understanding of the genetic risk architecture of ASD. While showing a complex and heterogeneous landscape, these studies have led to the identification of genetic loci associated with ASD risk. The intersection of genetic and transcriptomic analyses have also begun to shed light on functional convergences between risk genes, with the mid-fetal development of the cerebral cortex emerging as a critical nexus for ASD. In this review, we provide a concise summary of the latest genetic discoveries on ASD. We then discuss the studies in postmortem tissues, stem cell models, and rodent models that implicate recently identified ASD risk genes in cortical development.
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Affiliation(s)
- Marta Garcia-Forn
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.G.-F.); (A.B.); (Z.A.)
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Andrea Boitnott
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.G.-F.); (A.B.); (Z.A.)
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Zeynep Akpinar
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.G.-F.); (A.B.); (Z.A.)
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Psychology, College of Arts and Sciences, New York University, New York, NY 10003, USA
| | - Silvia De Rubeis
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; (M.G.-F.); (A.B.); (Z.A.)
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Correspondence: ; Tel.: +1-212-241-0179
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Link N, Bellen HJ. Using Drosophila to drive the diagnosis and understand the mechanisms of rare human diseases. Development 2020; 147:dev191411. [PMID: 32988995 PMCID: PMC7541339 DOI: 10.1242/dev.191411] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Next-generation sequencing has greatly accelerated the discovery of rare human genetic diseases. Nearly 45% of patients have variants associated with known diseases but the unsolved cases remain a conundrum. Moreover, causative mutations can be difficult to pinpoint because variants frequently map to genes with no previous disease associations and, often, only one or a few patients with variants in the same gene are identified. Model organisms, such as Drosophila, can help to identify and characterize these new disease-causing genes. Importantly, Drosophila allow quick and sophisticated genetic manipulations, permit functional testing of human variants, enable the characterization of pathogenic mechanisms and are amenable to drug tests. In this Spotlight, focusing on microcephaly as a case study, we highlight how studies of human genes in Drosophila have aided our understanding of human genetic disorders, allowing the identification of new genes in well-established signaling pathways.
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Affiliation(s)
- Nichole Link
- Howard Hughes Medical Institute, BCM, Houston, TX, 77030, USA
- Department of Molecular and Human Genetics (MHG), BCM, Houston, TX, 77030, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
| | - Hugo J Bellen
- Howard Hughes Medical Institute, BCM, Houston, TX, 77030, USA
- Department of Molecular and Human Genetics (MHG), BCM, Houston, TX, 77030, USA
- Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX, 77030, USA
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International consensus recommendations on the diagnostic work-up for malformations of cortical development. Nat Rev Neurol 2020; 16:618-635. [PMID: 32895508 PMCID: PMC7790753 DOI: 10.1038/s41582-020-0395-6] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/20/2020] [Indexed: 12/22/2022]
Abstract
Malformations of cortical development (MCDs) are neurodevelopmental disorders that result from abnormal development of the cerebral cortex in utero. MCDs place a substantial burden on affected individuals, their families and societies worldwide, as these individuals can experience lifelong drug-resistant epilepsy, cerebral palsy, feeding difficulties, intellectual disability and other neurological and behavioural anomalies. The diagnostic pathway for MCDs is complex owing to wide variations in presentation and aetiology, thereby hampering timely and adequate management. In this article, the international MCD network Neuro-MIG provides consensus recommendations to aid both expert and non-expert clinicians in the diagnostic work-up of MCDs with the aim of improving patient management worldwide. We reviewed the literature on clinical presentation, aetiology and diagnostic approaches for the main MCD subtypes and collected data on current practices and recommendations from clinicians and diagnostic laboratories within Neuro-MIG. We reached consensus by 42 professionals from 20 countries, using expert discussions and a Delphi consensus process. We present a diagnostic workflow that can be applied to any individual with MCD and a comprehensive list of MCD-related genes with their associated phenotypes. The workflow is designed to maximize the diagnostic yield and increase the number of patients receiving personalized care and counselling on prognosis and recurrence risk.
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Gabriel E, Ramani A, Altinisik N, Gopalakrishnan J. Human Brain Organoids to Decode Mechanisms of Microcephaly. Front Cell Neurosci 2020; 14:115. [PMID: 32457578 PMCID: PMC7225330 DOI: 10.3389/fncel.2020.00115] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/09/2020] [Indexed: 12/13/2022] Open
Abstract
Brain organoids are stem cell-based self-assembling 3D structures that recapitulate early events of human brain development. Recent improvements with patient-specific 3D brain organoids have begun to elucidate unprecedented details of the defective mechanisms that cause neurodevelopmental disorders of congenital and acquired microcephaly. In particular, brain organoids derived from primary microcephaly patients have uncovered mechanisms that deregulate neural stem cell proliferation, maintenance, and differentiation. Not only did brain organoids reveal unknown aspects of neurogenesis but also have illuminated surprising roles of cellular structures of centrosomes and primary cilia in regulating neurogenesis during brain development. Here, we discuss how brain organoids have started contributing to decoding the complexities of microcephaly, which are unlikely to be identified in the existing non-human models. Finally, we discuss the yet unresolved questions and challenges that can be addressed with the use of brain organoids as in vitro models of neurodevelopmental disorders.
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Affiliation(s)
- Elke Gabriel
- Laboratory for Centrosome and Cytoskeleton Biology, Institute für Humangenetik, Universitätsklinikum Düsseldorf, Heinrich-Heine-Universität, Düsseldorf, Germany
| | - Anand Ramani
- Laboratory for Centrosome and Cytoskeleton Biology, Institute für Humangenetik, Universitätsklinikum Düsseldorf, Heinrich-Heine-Universität, Düsseldorf, Germany
| | - Nazlican Altinisik
- Laboratory for Centrosome and Cytoskeleton Biology, Institute für Humangenetik, Universitätsklinikum Düsseldorf, Heinrich-Heine-Universität, Düsseldorf, Germany
| | - Jay Gopalakrishnan
- Laboratory for Centrosome and Cytoskeleton Biology, Institute für Humangenetik, Universitätsklinikum Düsseldorf, Heinrich-Heine-Universität, Düsseldorf, Germany
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De Novo Variants in SPOP Cause Two Clinically Distinct Neurodevelopmental Disorders. Am J Hum Genet 2020; 106:405-411. [PMID: 32109420 DOI: 10.1016/j.ajhg.2020.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 02/05/2020] [Indexed: 12/20/2022] Open
Abstract
Recurrent somatic variants in SPOP are cancer specific; endometrial and prostate cancers result from gain-of-function and dominant-negative effects toward BET proteins, respectively. By using clinical exome sequencing, we identified six de novo pathogenic missense variants in SPOP in seven individuals with developmental delay and/or intellectual disability, facial dysmorphisms, and congenital anomalies. Two individuals shared craniofacial dysmorphisms, including congenital microcephaly, that were strikingly different from those of the other five individuals, who had (relative) macrocephaly and hypertelorism. We measured the effect of SPOP variants on BET protein amounts in human Ishikawa endometrial cancer cells and patient-derived cell lines because we hypothesized that variants would lead to functional divergent effects on BET proteins. The de novo variants c.362G>A (p.Arg121Gln) and c. 430G>A (p.Asp144Asn), identified in the first two individuals, resulted in a gain of function, and conversely, the c.73A>G (p.Thr25Ala), c.248A>G (p.Tyr83Cys), c.395G>T (p.Gly132Val), and c.412C>T (p.Arg138Cys) variants resulted in a dominant-negative effect. Our findings suggest that these opposite functional effects caused by the variants in SPOP result in two distinct and clinically recognizable syndromic forms of intellectual disability with contrasting craniofacial dysmorphisms.
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Neurofibromatosis Type 1 Implicates Ras Pathways in the Genetic Architecture of Neurodevelopmental Disorders. Behav Genet 2020; 50:191-202. [DOI: 10.1007/s10519-020-09991-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 01/04/2020] [Indexed: 01/12/2023]
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