DOCSLIB.ORG

Cranial Neural Crest Cells and Their Role in the Pathogenesis of Craniofacial Anomalies and Coronal Craniosynostosis

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Cranial Neural Crest Cells and Their Role in the Pathogenesis of Craniofacial Anomalies and Coronal Craniosynostosis Journal of Developmental Biology Review Cranial Neural Crest Cells and Their Role in the Pathogenesis of Craniofacial Anomalies and Coronal Craniosynostosis Erica M. Siismets 1 and Nan E. Hatch 2,* 1 Oral Health Sciences PhD Program, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA; [email protected] 2 Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA * Correspondence: [email protected]; Tel.: +1-734-647-6567 Received: 31 July 2020; Accepted: 7 September 2020; Published: 9 September 2020 Abstract: Craniofacial anomalies are among the most common of birth defects. The pathogenesis of craniofacial anomalies frequently involves defects in the migration, proliferation, and fate of neural crest cells destined for the craniofacial skeleton. Genetic mutations causing deficient cranial neural crest migration and proliferation can result in Treacher Collins syndrome, Pierre Robin sequence, and cleft palate. Defects in post-migratory neural crest cells can result in pre- or post-ossification defects in the developing craniofacial skeleton and craniosynostosis (premature fusion of cranial bones/cranial sutures). The coronal suture is the most frequently fused suture in craniosynostosis syndromes. It exists as a biological boundary between the neural crest-derived frontal bone and paraxial mesoderm-derived parietal bone. The objective of this review is to frame our current understanding of neural crest cells in craniofacial development, craniofacial anomalies, and the pathogenesis of coronal craniosynostosis. We will also discuss novel approaches for advancing our knowledge and developing prevention and/or treatment strategies for craniofacial tissue regeneration and craniosynostosis. Keywords: craniofacial; skull; craniofacial abnormalities; neural crest; craniosynostoses; growth and development 1. Introduction Craniofacial anomalies are among the most common of all birth defects. Like many congenital defects, most craniofacial anomalies occur due to a combination of genetic and environmental factors, the latter including maternal exposure to toxins (including tobacco and alcohol) and certain medications [1,2]. Craniofacial anomalies can occur in isolation (the anomaly occurs with no other defects and with no established genetic basis), as part of an established syndrome with a known constellation of defects due to single gene mutation or chromosomal abnormality, or in association with additional development defects, but without a known genetic basis. The pathogenesis of developmental craniofacial abnormalities commonly involves defects in the migration, proliferation, and fate of cranial neural crest cells and their derivatives. These neural crest developmental abnormalities lead to a variety of developmental defect syndromes, overall referred to as neurocristopathies, including those that are found in cleft palate [3], Treacher Collins syndrome [4], Pierre Robin sequence [5], and craniosynostosis [6]. The coronal cranial suture is prematurely fused in many individuals with syndromic craniosynostosis, and particularly in those with mutations in FGFR2 or Twist [7,8]. Unlike other cranial sutures, the coronal suture develops between mesoderm-derived parietal and neural crest-derived frontal bone rudiments, and it maintains the J. Dev. Biol. 2020, 8, 18; doi:10.3390/jdb8030018 www.mdpi.com/journal/jdb J. Dev. Biol. 2020, 8, 18 2 of 27 boundary between these bone tissues of different embryonic origin during growth [9,10]. Therefore, the role of neural crest cell defects in the pathogenesis of coronal craniosynostosis is of particular interest. In this review, we will first provide an overview of neural crest cells in mammalian craniofacial development and cranial neural crest cells in craniofacial anomalies. We will subsequently focus on cranial neural crest cells in mammalian skull development and the pathogenesis of craniosynostosis, with particular emphasis on premature fusion of the coronal suture, due to the large amount of literature that exists in this field. Finally, we will discuss novel approaches for prevention and treatment. 2. Neural CrestJ. Dev. Cells Biol. 2020, 8, x 2 of 28 Neural crestneural cells crest arecell defects a transient in the pathogenesis stem cell of coronal population craniosynostosis characterized is of particular byinterest. their In this strong migratory review, we will first provide an overview of neural crest cells in mammalian craniofacial potential and multipotency.development and The cranial neural neural crest cells is uniquein craniofacial to vertebrates anomalies. We and will subsequently it can be divided focus on into four major sub-populations:cranial cranial, neural crest cardiac, cells in mammalian vagal, and skull trunk. development Each and defined the pathogenesis sub-population of craniosynostosis, of neural crest cells with particular emphasis on premature fusion of the coronal suture, due to the large amount of differentiates intoliterature diverse, that exists specialized in this field. cells, Finally, and we tissueswill discuss particular novel approaches to the for axial prevention level and of origin. Neural crest cells arisetreatment. in the embryonic ectodermal germ layer at the neural plate border during gastrulation. A precise combination2. Neural Crest ofBMP, Cells FGF, Wnt, and Notch inductive signals from the ectoderm triggers an epithelial-to-mesenchymalNeural crest transition cells are a transient (EMT) stem in thecell popu neurallation plate characterized border by territory their strong [ 11migratory] (Figure 1). EMT is a complex, multi-steppotential process and multipotency. required The to neural transform crest is unique adherent to vertebrates neuroepithelial and it can be divided cells into into four migratory neural crest cells. Thismajor transformation sub-populations: is cranial, induced cardiac, through vagal, and the trunk. dissolution Each defined of sub-population adherens junctions of neural crest through cadherin cells differentiates into diverse, specialized cells, and tissues particular to the axial level of origin. expression changes.Neural EMTcrest cells is regulatedarise in the embryonic by Wnt /ectodermalβ-catenin germ signaling layer at the and neural it can plate be border thought during of as a spectrum of epithelial andgastrulation. mesenchymal A precise cell combination fates, rather of BMP, than FGF, an Wnt, exact and binary Notch switchinductive [ 12signals]. The from first the cadherin switch ectoderm triggers an epithelial-to-mesenchymal transition (EMT) in the neural plate border territory allows neural crest[11] (Figure cells to1). delaminateEMT is a complex, from multi-step the neural process tuberequired and to transform the second adherent switch neuroepithelial grants neural crest cells their migratorycells potential into migratory [13]. neural The onsetcrest cells. of EMTThis transformation in mouse embryosis induced through is controlled the dissolution by glycogen of synthase adherens junctions through βcadherin expression changes. EMT is regulated by Wnt/β-catenin kinase 3 (GSK3),signaling a component and it can be of thought the of-catenin as a spectrum destruction of epithelial complexand mesenchymal [14,15 cell]. fates, GSK3 rather phosphorylates than Snail and Twist in premigratoryan exact binary switch neural [12]. crest The first cells cadherin (Lander), switch allows which neural along crest withcells to other delaminate neural from crestthe transcription factors FoxD3, neuralSip1/Zeb2 tube and, and the secondSox9 /switch10, will grants downregulate neural crest cells their epithelial migratory cadherins potential [13]. and The onset cadherin6B [16,17]. of EMT in mouse embryos is controlled by glycogen synthase kinase 3 (GSK3), a component of the β- Epithelial cadherincatenin signatures destruction comple are replacedx [14,15]. GSK3 with phosphorylates mesenchymal Snail cadherin-7and Twist in premigratoryand cadherin-11 neural , as neural crest cells become migratorycrest cells (Lander), [18]. Metalloproteinases which along with other neural (including crest transcription MMP-2, factors -9, -14FoxD3 and, Sip1/Zeb2 ADAM-10,, and -13, and -19) Sox9/10, will downregulate epithelial cadherins and cadherin6B [16,17]. Epithelial cadherin are required forsignatures neural are crest replaced delamination with mesenchymal and migrationcadherin-7 andto cadherin-11 degrade, as cadherinsneural crest cells within become and extracellular matrix proteinsmigratory around [18]. neural Metalloproteinases crest cells (including [12,19–21 MMP-2,]. Defects -9, -14 inand components ADAM-10, -13, thatand -19) are are involved in EMT required for neural crest delamination and migration to degrade cadherins within and extracellular can affect craniofacialmatrix proteins development. around neural crest For cells example, [12,19–21]. the Defects loss in ofcomponents GSK3 inthat mouse are involved embryos in EMT results in cleft palate [22], reducedcan affect frontal craniofacial bone development. size, and For enlarged example, the frontal loss of fontanelleGSK3 in mouse [23 embryos]. results in cleft palate [22], reduced frontal bone size, and enlarged frontal fontanelle [23]. Figure 1. Early neural crest cell development in mouse embryos. (a) Gastrulation: neural crest cells Figure 1. Earlyare neural inducedcrest at the neural cell developmentplate border (NPB) between in mouse the neural embryos. plate (NP) ( aand) Gastrulation: non-neural ectoderm
Load more

Recommended publications
  • Notch Signaling Regulates the Differentiation of Neural Crest From
    ß 2014. Published by The Company of Biologists Ltd | Journal of Cell Science (2014) 127, 2083–2094 doi:10.1242/jcs.145755 RESEARCH ARTICLE Notch signaling regulates the differentiation of neural crest from human pluripotent stem cells Parinya Noisa1,2, Carina Lund2, Kartiek Kanduri3, Riikka Lund3, Harri La¨hdesma¨ki3, Riitta Lahesmaa3, Karolina Lundin2, Hataiwan Chokechuwattanalert2, Timo Otonkoski4,5, Timo Tuuri5,6,* and Taneli Raivio2,4,*,` ABSTRACT Kokta et al., 2013). Neural crest cells originate from neuroectoderm at the border between the neural plate and the Neural crest cells are specified at the border between the neural epiderm (Meulemans and Bronner-Fraser, 2004), and they are plate and the epiderm. They are capable of differentiating into marked by the expression of genes that are specific for the neural- various somatic cell types, including craniofacial and peripheral plate border, such as DLX5, MSX1, MSX2 and ZIC1. Later, during nerve tissues. Notch signaling plays important roles during the neural-tube folding process, neural crest cells remain within neurogenesis; however, its function during human neural crest the neural folds and subsequently localize inside the dorsal development is poorly understood. Here, we generated self- portion of the neural tube. These premigratory neural crest cells renewing premigratory neural-crest-like cells (pNCCs) from human express specifier genes, such as SNAIL (also known as SNAI1), pluripotent stem cells (hPSCs) and investigated the roles of Notch SLUG (also known as SNAI2), SOX10 and TWIST1 (LaBonne and signaling during neural crest differentiation. pNCCs expressed Bronner-Fraser, 2000; Mancilla and Mayor, 1996). Following the various neural-crest-specifier genes, including SLUG (also known formation of the neural tube, premigratory neural crest cells as SNAI2), SOX10 and TWIST1, and were able to differentiate into undergo an epithelial-to-mesenchymal transition (EMT) and most neural crest derivatives.
    [Show full text]
  • Tall Stature: a Difficult Diagnosis? Cristina Meazza1* , Chiara Gertosio2, Roberta Giacchero3, Sara Pagani1 and Mauro Bozzola1
    Meazza et al. Italian Journal of Pediatrics (2017) 43:66 DOI 10.1186/s13052-017-0385-5 REVIEW Open Access Tall stature: a difficult diagnosis? Cristina Meazza1* , Chiara Gertosio2, Roberta Giacchero3, Sara Pagani1 and Mauro Bozzola1 Abstract Referral for an assessment of tall stature is less common than for short stature. Tall stature is defined as a height more than two standard deviations above the mean for age. The majority of subjects with tall stature show a familial tall stature or a constitutional advance of growth (CAG), which is a diagnosis of exclusion. After a careful physical evaluation, tall subjects may be divided into two groups: tall subjects with normal appearance and tall subjects with abnormal appearance. In the case of normal appearance, the paediatric endocrinologist will have to evaluate the growth rate. If it is normal for age and sex, the subject may be classified as having familial tall stature, CAG or obese subject, while if the growth rate is increased it is essential to evaluate pubertal status and thyroid status. Tall subjects with abnormal appearance and dysmorphisms can be classified into those with proportionate and disproportionate syndromes. A careful physical examination and an evaluation of growth pattern are required before starting further investigations. Physicians should always search for a pathological cause of tall stature, although the majority of children are healthy and they generally do not need treatment to cease growth progression. The most accepted and effective treatment for an excessive height prediction is inducing puberty early and leading to a complete fusion of the epiphyses and achievement of final height, using testosterone in males and oestrogens in females.
    [Show full text]
  • The Migration of Neural Crest Cells and the Growth of Motor Axons Through the Rostral Half of the Chick Somite
    /. Embryol. exp. Morph. 90, 437-455 (1985) 437 Printed in Great Britain © The Company of Biologists Limited 1985 The migration of neural crest cells and the growth of motor axons through the rostral half of the chick somite M. RICKMANN, J. W. FAWCETT The Salk Institute and The Clayton Foundation for Research, California division, P.O. Box 85800, San Diego, CA 92138, U.S.A. AND R. J. KEYNES Department of Anatomy, University of Cambridge, Downing St, Cambridge, CB2 3DY, U.K. SUMMARY We have studied the pathway of migration of neural crest cells through the somites of the developing chick embryo, using the monoclonal antibodies NC-1 and HNK-1 to stain them. Crest cells, as they migrate ventrally from the dorsal aspect of the neural tube, pass through the lateral part of the sclerotome, but only through that part of the sclerotome which lies in the rostral half of each somite. This migration pathway is almost identical to the path which pre- sumptive motor axons take when they grow out from the neural tube shortly after the onset of neural crest migration. In order to see whether the ventral root axons are guided along this pathway by neural crest cells, we surgically excised the neural crest from a series of embryos, and examined the pattern of axon outgrowth approximately 24 h later. In somites which contained no neural crest cells, ventral root axons were still found only in the rostral half of the somite, although axonal growth was slightly delayed. These axons were surrounded by sheath cells, which had presumably migrated out of the neural tube, to a point about 50 jan proximal to the growth cones.
    [Show full text]
  • Genetic Investigation of Patients with Tall Stature
    2 182 E Vasco de Albuquerque Genetic investigation of tall 182:2 139–147 Clinical Study Albuquerque and others stature patients Genetic investigation of patients with tall stature Edoarda Vasco de Albuquerque Albuquerque1, Mariana Ferreira de Assis Funari2, Elisângela Pereira de Souza Quedas1, Rachel Sayuri Honjo Kawahira3, Raquel Soares Jallad4, Thaís Kataoka Homma1, Regina Matsunaga Martin2,5, Vinicius Nahime Brito2, Alexsandra Christianne Malaquias1,6, Antonio Marcondes Lerario1,7, Carla Rosenberg8, Ana Cristina Victorino Krepischi8, Chong Ae Kim3, Ivo Jorge Prado Arnhold2 and Alexander Augusto de Lima Jorge1 1Unidade de Endocrinologia Genética (LIM25), 2Unidade de Endocrinologia do Desenvolvimento, Laboratório de Hormônios e Genética Molecular (LIM42), Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, Brasil, 3Unidade de Genética do Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brasil, 4Unidade de Neuroendocrinologia, 5Unidade de Doenças Osteometabólicas, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo (USP), São Paulo, Brasil, 6Unidade de Endocrinologia Pediátrica, Correspondence Departamento de Pediatria, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brasil, 7Division of should be addressed Metabolism, Endocrinology and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, to A A L Jorge Michigan, USA, and 8Instituto de Biociências (IB), Universidade de São Paulo (USP), São Paulo, Brasil Email [email protected] Abstract Context: Patients with tall stature often remain undiagnosed after clinical investigation and few studies have genetically assessed this group, most of them without a systematic approach. Objective: To assess prospectively a group of individuals with tall stature, with and without syndromic features, and to establish a molecular diagnosis for their growth disorder.
    [Show full text]
  • The Genetic Basis of Mammalian Neurulation
    REVIEWS THE GENETIC BASIS OF MAMMALIAN NEURULATION Andrew J. Copp*, Nicholas D. E. Greene* and Jennifer N. Murdoch‡ More than 80 mutant mouse genes disrupt neurulation and allow an in-depth analysis of the underlying developmental mechanisms. Although many of the genetic mutants have been studied in only rudimentary detail, several molecular pathways can already be identified as crucial for normal neurulation. These include the planar cell-polarity pathway, which is required for the initiation of neural tube closure, and the sonic hedgehog signalling pathway that regulates neural plate bending. Mutant mice also offer an opportunity to unravel the mechanisms by which folic acid prevents neural tube defects, and to develop new therapies for folate-resistant defects. 6 ECTODERM Neurulation is a fundamental event of embryogenesis distinct locations in the brain and spinal cord .By The outer of the three that culminates in the formation of the neural tube, contrast, the mechanisms that underlie the forma- embryonic (germ) layers that which is the precursor of the brain and spinal cord. A tion, elevation and fusion of the neural folds have gives rise to the entire central region of specialized dorsal ECTODERM, the neural plate, remained elusive. nervous system, plus other organs and embryonic develops bilateral neural folds at its junction with sur- An opportunity has now arisen for an incisive analy- structures. face (non-neural) ectoderm. These folds elevate, come sis of neurulation mechanisms using the growing battery into contact (appose) in the midline and fuse to create of genetically targeted and other mutant mouse strains NEURAL CREST the neural tube, which, thereafter, becomes covered by in which NTDs form part of the mutant phenotype7.At A migratory cell population that future epidermal ectoderm.
    [Show full text]
  • Megalencephaly and Macrocephaly
    277 Megalencephaly and Macrocephaly KellenD.Winden,MD,PhD1 Christopher J. Yuskaitis, MD, PhD1 Annapurna Poduri, MD, MPH2 1 Department of Neurology, Boston Children’s Hospital, Boston, Address for correspondence Annapurna Poduri, Epilepsy Genetics Massachusetts Program, Division of Epilepsy and Clinical Electrophysiology, 2 Epilepsy Genetics Program, Division of Epilepsy and Clinical Department of Neurology, Fegan 9, Boston Children’s Hospital, 300 Electrophysiology, Department of Neurology, Boston Children’s Longwood Avenue, Boston, MA 02115 Hospital, Boston, Massachusetts (e-mail: [email protected]). Semin Neurol 2015;35:277–287. Abstract Megalencephaly is a developmental disorder characterized by brain overgrowth secondary to increased size and/or numbers of neurons and glia. These disorders can be divided into metabolic and developmental categories based on their molecular etiologies. Metabolic megalencephalies are mostly caused by genetic defects in cellular metabolism, whereas developmental megalencephalies have recently been shown to be caused by alterations in signaling pathways that regulate neuronal replication, growth, and migration. These disorders often lead to epilepsy, developmental disabilities, and Keywords behavioral problems; specific disorders have associations with overgrowth or abnor- ► megalencephaly malities in other tissues. The molecular underpinnings of many of these disorders are ► hemimegalencephaly now understood, providing insight into how dysregulation of critical pathways leads to ►
    [Show full text]
  • Semaphorin3a/Neuropilin-1 Signaling Acts As a Molecular Switch Regulating Neural Crest Migration During Cornea Development
    Developmental Biology 336 (2009) 257–265 Contents lists available at ScienceDirect Developmental Biology journal homepage: www.elsevier.com/developmentalbiology Semaphorin3A/neuropilin-1 signaling acts as a molecular switch regulating neural crest migration during cornea development Peter Y. Lwigale a,⁎, Marianne Bronner-Fraser b a Department of Biochemistry and Cell Biology, MS 140, Rice University, P.O. Box 1892, Houston, TX 77251, USA b Division of Biology, 139-74, California Institute of Technology, Pasadena, CA 91125, USA article info abstract Article history: Cranial neural crest cells migrate into the periocular region and later contribute to various ocular tissues Received for publication 2 April 2009 including the cornea, ciliary body and iris. After reaching the eye, they initially pause before migrating over Revised 11 September 2009 the lens to form the cornea. Interestingly, removal of the lens leads to premature invasion and abnormal Accepted 6 October 2009 differentiation of the cornea. In exploring the molecular mechanisms underlying this effect, we find that Available online 13 October 2009 semaphorin3A (Sema3A) is expressed in the lens placode and epithelium continuously throughout eye development. Interestingly, neuropilin-1 (Npn-1) is expressed by periocular neural crest but down- Keywords: Semaphorin3A regulated, in a manner independent of the lens, by the subpopulation that migrates into the eye and gives Neuropilin-1 rise to the cornea endothelium and stroma. In contrast, Npn-1 expressing neural crest cells remain in the Neural crest periocular region and contribute to the anterior uvea and ocular blood vessels. Introduction of a peptide that Cornea inhibits Sema3A/Npn-1 signaling results in premature entry of neural crest cells over the lens that Lens phenocopies lens ablation.
    [Show full text]
  • Segmentation and Specification of the Drosophila Mesoderm
    Downloaded from genesdev.cshlp.org on September 25, 2021 - Published by Cold Spring Harbor Laboratory Press Segmentation and specification of the Drosophila mesoderm Natalia Azpiazu, 1,3 Peter A. Lawrence, 2 Jean-Paul Vincent, 2 and Manfred Frasch 1'4 1Brookdale Center for Molecular Biology, Mount Sinai School of Medicine, New York, New York 10029 USA; 2Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 2QH, UK Patterning of the developing mesoderm establishes primordia of the visceral, somatic, and cardiac tissues at defined anteroposterior and dorsoventral positions in each segment. Here we examine the mechanisms that locate and determine these primordia. We focus on the regulation of two mesodermal genes: bagpipe (hap), which defines the anlagen of the visceral musculature of the midgut, and serpent (srp), which marks the anlagen of the fat body. These two genes are activated in specific groups of mesodermal cells in the anterior portions of each parasegment. Other genes mark the anlagen of the cardiac and somatic mesoderm and these are expressed mainly in cells derived from posterior portions of each parasegment. Thus the parasegments appear to be subdivided, at least with respect to these genes, a subdivision that depends on pair-rule genes such as even-skipped (eve). We show with genetic mosaics that eve acts autonomously within the mesoderm. We also show that hedgehog (hh) and wingless (wg) mediate pair-rule gene functions in the mesoderm, probably partly by acting within the mesoderm and partly by inductive signaling from the ectoderm, hh is required for the normal activation of hap and srp in anterior portions of each parasegment, whereas wg is required to suppress bap and srp expression in posterior portions.
    [Show full text]
  • Mesoderm Induction and the Control of Gastrulation in Xenopus Laevis:The
    Development 108, 229-238 (1990) 229 Printed in Great Britain ©The Company of Biologists Limited 1990 Mesoderm induction and the control of gastrulation in Xenopus laevis: the roles of fibronectin and integrins J. C. SMITH1, K. SYMESH, R. O. HYNES2'3 and D. DeSIMONE3* ' Laboratory of Embryogenesis, National Institute for Medical Research, The Ridgeway, Mill Hill, London NW71AA, UK ^Howard Hughes Medical Institute and ^Center for Cancer Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA * Present address: University of Virginia, Health Sciences Center, Department of Anatomy and Cell Biology, Box 439, School of Medicine, Charlottesville, VA 22908, USA t Present address: Department of Cell and Molecular Biology, 385 LSA, University of California, Berkeley, CA 94720, USA Summary Exposure of isolated Xenopus animal pole ectoderm to diated cell migration is not required for convergent the XTC mesoderm-inducing factor (XTC-MIF) causes extension. the tissue to undergo gastrulation-like movements. In We have investigated the molecular basis of XTC- this paper, we take advantage of this observation to MIF-induced gastrulation-like movements by measuring investigate the control of various aspects of gastrulation rates of synthesis of fibronectin and of the integrin f}y in Xenopus. chain in induced and control explants. No significant Blastomcres derived from induced animal pole regions differences were observed, and this suggests that gastru- are able, like marginal zone cells, but unlike control lation is not initiated simply by control of synthesis of animal pole blastomeres, to spread and migrate on a these molecules. In future work, we intend to investigate fibronectin-coated surface.
    [Show full text]
  • Craniosynostosis and Related Disorders Mark S
    CLINICAL REPORT Guidance for the Clinician in Rendering Pediatric Care Identifying the Misshapen Head: Craniosynostosis and Related Disorders Mark S. Dias, MD, FAAP, FAANS,a Thomas Samson, MD, FAAP,b Elias B. Rizk, MD, FAAP, FAANS,a Lance S. Governale, MD, FAAP, FAANS,c Joan T. Richtsmeier, PhD,d SECTION ON NEUROLOGIC SURGERY, SECTION ON PLASTIC AND RECONSTRUCTIVE SURGERY Pediatric care providers, pediatricians, pediatric subspecialty physicians, and abstract other health care providers should be able to recognize children with abnormal head shapes that occur as a result of both synostotic and aSection of Pediatric Neurosurgery, Department of Neurosurgery and deformational processes. The purpose of this clinical report is to review the bDivision of Plastic Surgery, Department of Surgery, College of characteristic head shape changes, as well as secondary craniofacial Medicine and dDepartment of Anthropology, College of the Liberal Arts characteristics, that occur in the setting of the various primary and Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania; and cLillian S. Wells Department of craniosynostoses and deformations. As an introduction, the physiology and Neurosurgery, College of Medicine, University of Florida, Gainesville, genetics of skull growth as well as the pathophysiology underlying Florida craniosynostosis are reviewed. This is followed by a description of each type of Clinical reports from the American Academy of Pediatrics benefit from primary craniosynostosis (metopic, unicoronal, bicoronal, sagittal, lambdoid, expertise and resources of liaisons and internal (AAP) and external reviewers. However, clinical reports from the American Academy of and frontosphenoidal) and their resultant head shape changes, with an Pediatrics may not reflect the views of the liaisons or the emphasis on differentiating conditions that require surgical correction from organizations or government agencies that they represent.
    [Show full text]
  • Guidelines for Conducting Birth Defects Surveillance
    NATIONAL BIRTH DEFECTS PREVENTION NETWORK HTTP://WWW.NBDPN.ORG Guidelines for Conducting Birth Defects Surveillance Edited By Lowell E. Sever, Ph.D. June 2004 Support for development, production, and distribution of these guidelines was provided by the Birth Defects State Research Partnerships Team, National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention Copies of Guidelines for Conducting Birth Defects Surveillance can be viewed or downloaded from the NBDPN website at http://www.nbdpn.org/bdsurveillance.html. Comments and suggestions on this document are welcome. Submit comments to the Surveillance Guidelines and Standards Committee via e-mail at [email protected]. You may also contact a member of the NBDPN Executive Committee by accessing http://www.nbdpn.org and then selecting Network Officers and Committees. Suggested citation according to format of Uniform Requirements for Manuscripts ∗ Submitted to Biomedical Journals:∗ National Birth Defects Prevention Network (NBDPN). Guidelines for Conducting Birth Defects Surveillance. Sever, LE, ed. Atlanta, GA: National Birth Defects Prevention Network, Inc., June 2004. National Birth Defects Prevention Network, Inc. Web site: http://www.nbdpn.org E-mail: [email protected] ∗International Committee of Medical Journal Editors. Uniform requirements for manuscripts submitted to biomedical journals. Ann Intern Med 1988;108:258-265. We gratefully acknowledge the following individuals and organizations who contributed to developing, writing, editing, and producing this document. NBDPN SURVEILLANCE GUIDELINES AND STANDARDS COMMITTEE STEERING GROUP Carol Stanton, Committee Chair (CO) Larry Edmonds (CDC) F. John Meaney (AZ) Glenn Copeland (MI) Lisa Miller-Schalick (MA) Peter Langlois (TX) Leslie O’Leary (CDC) Cara Mai (CDC) EDITOR Lowell E.
    [Show full text]
  • Blueprint Genetics Craniosynostosis Panel
    Craniosynostosis Panel Test code: MA2901 Is a 38 gene panel that includes assessment of non-coding variants. Is ideal for patients with craniosynostosis. About Craniosynostosis Craniosynostosis is defined as the premature fusion of one or more cranial sutures leading to secondary distortion of skull shape. It may result from a primary defect of ossification (primary craniosynostosis) or, more commonly, from a failure of brain growth (secondary craniosynostosis). Premature closure of the sutures (fibrous joints) causes the pressure inside of the head to increase and the skull or facial bones to change from a normal, symmetrical appearance resulting in skull deformities with a variable presentation. Craniosynostosis may occur in an isolated setting or as part of a syndrome with a variety of inheritance patterns and reccurrence risks. Craniosynostosis occurs in 1/2,200 live births. Availability 4 weeks Gene Set Description Genes in the Craniosynostosis Panel and their clinical significance Gene Associated phenotypes Inheritance ClinVar HGMD ALPL Odontohypophosphatasia, Hypophosphatasia perinatal lethal, AD/AR 78 291 infantile, juvenile and adult forms ALX3 Frontonasal dysplasia type 1 AR 8 8 ALX4 Frontonasal dysplasia type 2, Parietal foramina AD/AR 15 24 BMP4 Microphthalmia, syndromic, Orofacial cleft AD 8 39 CDC45 Meier-Gorlin syndrome 7 AR 10 19 EDNRB Hirschsprung disease, ABCD syndrome, Waardenburg syndrome AD/AR 12 66 EFNB1 Craniofrontonasal dysplasia XL 28 116 ERF Craniosynostosis 4 AD 17 16 ESCO2 SC phocomelia syndrome, Roberts syndrome
    [Show full text]