Ciliopathies
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Educational Paper Ciliopathies
Eur J Pediatr (2012) 171:1285–1300 DOI 10.1007/s00431-011-1553-z REVIEW Educational paper Ciliopathies Carsten Bergmann Received: 11 June 2011 /Accepted: 3 August 2011 /Published online: 7 September 2011 # The Author(s) 2011. This article is published with open access at Springerlink.com Abstract Cilia are antenna-like organelles found on the (NPHP) . Ivemark syndrome . Meckel syndrome (MKS) . surface of most cells. They transduce molecular signals Joubert syndrome (JBTS) . Bardet–Biedl syndrome (BBS) . and facilitate interactions between cells and their Alstrom syndrome . Short-rib polydactyly syndromes . environment. Ciliary dysfunction has been shown to Jeune syndrome (ATD) . Ellis-van Crefeld syndrome (EVC) . underlie a broad range of overlapping, clinically and Sensenbrenner syndrome . Primary ciliary dyskinesia genetically heterogeneous phenotypes, collectively (Kartagener syndrome) . von Hippel-Lindau (VHL) . termed ciliopathies. Literally, all organs can be affected. Tuberous sclerosis (TSC) . Oligogenic inheritance . Modifier. Frequent cilia-related manifestations are (poly)cystic Mutational load kidney disease, retinal degeneration, situs inversus, cardiac defects, polydactyly, other skeletal abnormalities, and defects of the central and peripheral nervous Introduction system, occurring either isolated or as part of syn- dromes. Characterization of ciliopathies and the decisive Defective cellular organelles such as mitochondria, perox- role of primary cilia in signal transduction and cell isomes, and lysosomes are well-known -
Near-Atomic Structures of the Bbsome Reveal the Basis for Bbsome
RESEARCH ARTICLE Near-atomic structures of the BBSome reveal the basis for BBSome activation and binding to GPCR cargoes Shuang Yang1†, Kriti Bahl2†, Hui-Ting Chou1‡, Jonathan Woodsmith3, Ulrich Stelzl3, Thomas Walz1*, Maxence V Nachury2* 1Laboratory of Molecular Electron Microscopy, The Rockefeller University, New York, United States; 2Department of Ophthalmology, University of California San Francisco, San Francisco, United States; 3Department of Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, University of Graz and BioTechMed-Graz, Graz, Austria Abstract Dynamic trafficking of G protein-coupled receptors (GPCRs) out of cilia is mediated by the BBSome. In concert with its membrane recruitment factor, the small GTPase ARL6/BBS3, the BBSome ferries GPCRs across the transition zone, a diffusion barrier at the base of cilia. Here, we present the near-atomic structures of the BBSome by itself and in complex with ARL6GTP, and we describe the changes in BBSome conformation induced by ARL6GTP binding. Modeling the *For correspondence: interactions of the BBSome with membranes and the GPCR Smoothened (SMO) reveals that SMO, [email protected] (TW); and likely also other GPCR cargoes, must release their amphipathic helix 8 from the membrane to [email protected] (MVN) be recognized by the BBSome. †These authors contributed equally to this work Present address: ‡Department of Therapeutic Discovery, Amgen Introduction Inc, South San Francisco, United Cilia dynamically concentrate signaling receptors to sense and transduce signals as varied as light, States odorant molecules, Hedgehog morphogens and ligands of G protein-coupled receptors (GPCRs) Competing interests: The (Anvarian et al., 2019; Bangs and Anderson, 2017; Nachury and Mick, 2019). Highlighting the authors declare that no functional importance of dynamic ciliary trafficking, the appropriate transduction of Hedgehog signal competing interests exist. -
Ciliopathiesneuromuscularciliopathies Disorders Disorders Ciliopathiesciliopathies
NeuromuscularCiliopathiesNeuromuscularCiliopathies Disorders Disorders CiliopathiesCiliopathies AboutAbout EGL EGL Genet Geneticsics EGLEGL Genetics Genetics specializes specializes in ingenetic genetic diagnostic diagnostic testing, testing, with with ne nearlyarly 50 50 years years of of clinical clinical experience experience and and board-certified board-certified labor laboratoryatory directorsdirectors and and genetic genetic counselors counselors reporting reporting out out cases. cases. EGL EGL Genet Geneticsics offers offers a combineda combined 1000 1000 molecular molecular genetics, genetics, biochemical biochemical genetics,genetics, and and cytogenetics cytogenetics tests tests under under one one roof roof and and custom custom test testinging for for all all medically medically relevant relevant genes, genes, for for domestic domestic andand international international clients. clients. EquallyEqually important important to to improving improving patient patient care care through through quality quality genetic genetic testing testing is is the the contribution contribution EGL EGL Genetics Genetics makes makes back back to to thethe scientific scientific and and medical medical communities. communities. EGL EGL Genetics Genetics is is one one of of only only a afew few clinical clinical diagnostic diagnostic laboratories laboratories to to openly openly share share data data withwith the the NCBI NCBI freely freely available available public public database database ClinVar ClinVar (>35,000 (>35,000 variants variants on on >1700 >1700 genes) genes) and and is isalso also the the only only laboratory laboratory with with a a frefree oen olinnlein dea dtabtaabsaes (eE m(EVmCVlaCslas)s,s f)e, afetuatruinrgin ag vaa vraiarniatn ctl acslasisfiscifiactiaotino sne saercahrc ahn adn rde rpeoprot rrte rqeuqeuset sint tinetrefarcfaec, ew, hwichhic fha cfailcitialiteatse rsa praidp id interactiveinteractive curation curation and and reporting reporting of of variants. -
Rare Variant Analysis of Human and Rodent Obesity Genes in Individuals with Severe Childhood Obesity Received: 11 November 2016 Audrey E
www.nature.com/scientificreports OPEN Rare Variant Analysis of Human and Rodent Obesity Genes in Individuals with Severe Childhood Obesity Received: 11 November 2016 Audrey E. Hendricks1,2, Elena G. Bochukova3,4, Gaëlle Marenne1, Julia M. Keogh3, Neli Accepted: 10 April 2017 Atanassova3, Rebecca Bounds3, Eleanor Wheeler1, Vanisha Mistry3, Elana Henning3, Published: xx xx xxxx Understanding Society Scientific Group*, Antje Körner5,6, Dawn Muddyman1, Shane McCarthy1, Anke Hinney7, Johannes Hebebrand7, Robert A. Scott8, Claudia Langenberg8, Nick J. Wareham8, Praveen Surendran9, Joanna M. Howson9, Adam S. Butterworth9,10, John Danesh1,9,10, EPIC-CVD Consortium*, Børge G Nordestgaard11,12, Sune F Nielsen11,12, Shoaib Afzal11,12, SofiaPa padia3, SofieAshford 3, Sumedha Garg3, Glenn L. Millhauser13, Rafael I. Palomino13, Alexandra Kwasniewska3, Ioanna Tachmazidou1, Stephen O’Rahilly3, Eleftheria Zeggini1, UK10K Consortium*, Inês Barroso1,3 & I. Sadaf Farooqi3 Obesity is a genetically heterogeneous disorder. Using targeted and whole-exome sequencing, we studied 32 human and 87 rodent obesity genes in 2,548 severely obese children and 1,117 controls. We identified 52 variants contributing to obesity in 2% of cases including multiple novel variants in GNAS, which were sometimes found with accelerated growth rather than short stature as described previously. Nominally significant associations were found for rare functional variants inBBS1 , BBS9, GNAS, MKKS, CLOCK and ANGPTL6. The p.S284X variant in ANGPTL6 drives the association signal (rs201622589, MAF~0.1%, odds ratio = 10.13, p-value = 0.042) and results in complete loss of secretion in cells. Further analysis including additional case-control studies and population controls (N = 260,642) did not support association of this variant with obesity (odds ratio = 2.34, p-value = 2.59 × 10−3), highlighting the challenges of testing rare variant associations and the need for very large sample sizes. -
TRIM32 Is an E3 Ubiquitin Ligase for Dysbindin
Human Molecular Genetics, 2009, Vol. 18, No. 13 2344–2358 doi:10.1093/hmg/ddp167 Advance Access published on April 6, 2009 TRIM32 is an E3 ubiquitin ligase for dysbindin Matthew Locke1,2, Caroline L. Tinsley1, Matthew A. Benson2,{ and Derek J. Blake1,Ã 1Department of Psychological Medicine, Cardiff University, Henry Wellcome Building for Biomedical Research in Wales, Heath Park, Cardiff, CF14 4XN, UK and 2Department of Pharmacology, University of Oxford, Mansfield Road, Oxford OX1 3QT, UK Received December 15, 2008; Revised and Accepted April 2, 2009 Mutations in the gene encoding tripartite motif protein 32 (TRIM32) cause two seemingly diverse diseases: limb-girdle muscular dystrophy type 2H (LGMD2H) or sarcotubular myopathy (STM) and Bardet–Biedl syndrome type 11(BBS11). Although TRIM32 is involved in protein ubiquitination, its substrates and the molecular consequences of disease-causing mutations are poorly understood. In this paper, we show that Downloaded from TRIM32 is a widely expressed ubiquitin ligase that is localized to the Z-line in skeletal muscle. Using the yeast two-hybrid system, we found that TRIM32 binds and ubiquitinates dysbindin, a protein implicated in the genetic aetiology of schizophrenia, augmenting its degradation. Small-interfering RNA-mediated knock-down of TRIM32 in myoblasts resulted in elevated levels of dysbindin. Importantly, the LGMD2H/ STM-associated TRIM32 mutations, D487N and R394H impair ubiquitin ligase activity towards dysbindin http://hmg.oxfordjournals.org/ and were mislocalized in heterologous cells. These mutants were able to self-associate and also co-immuno- precipitated with wild-type TRIM32 in transfected cells. Furthermore, the D487N mutant could bind to both dysbindin and its E2 enzyme but was defective in monoubiquitination. -
Synergistic Genetic Interactions Between Pkhd1 and Pkd1 Result in an ARPKD-Like Phenotype in Murine Models
BASIC RESEARCH www.jasn.org Synergistic Genetic Interactions between Pkhd1 and Pkd1 Result in an ARPKD-Like Phenotype in Murine Models Rory J. Olson,1 Katharina Hopp ,2 Harrison Wells,3 Jessica M. Smith,3 Jessica Furtado,1,4 Megan M. Constans,3 Diana L. Escobar,3 Aron M. Geurts,5 Vicente E. Torres,3 and Peter C. Harris 1,3 Due to the number of contributing authors, the affiliations are listed at the end of this article. ABSTRACT Background Autosomal recessive polycystic kidney disease (ARPKD) and autosomal dominant polycystic kidney disease (ADPKD) are genetically distinct, with ADPKD usually caused by the genes PKD1 or PKD2 (encoding polycystin-1 and polycystin-2, respectively) and ARPKD caused by PKHD1 (encoding fibrocys- tin/polyductin [FPC]). Primary cilia have been considered central to PKD pathogenesis due to protein localization and common cystic phenotypes in syndromic ciliopathies, but their relevance is questioned in the simple PKDs. ARPKD’s mild phenotype in murine models versus in humans has hampered investi- gating its pathogenesis. Methods To study the interaction between Pkhd1 and Pkd1, including dosage effects on the phenotype, we generated digenic mouse and rat models and characterized and compared digenic, monogenic, and wild-type phenotypes. Results The genetic interaction was synergistic in both species, with digenic animals exhibiting pheno- types of rapidly progressive PKD and early lethality resembling classic ARPKD. Genetic interaction be- tween Pkhd1 and Pkd1 depended on dosage in the digenic murine models, with no significant enhancement of the monogenic phenotype until a threshold of reduced expression at the second locus was breached. -
A Computational Approach for Defining a Signature of Β-Cell Golgi Stress in Diabetes Mellitus
Page 1 of 781 Diabetes A Computational Approach for Defining a Signature of β-Cell Golgi Stress in Diabetes Mellitus Robert N. Bone1,6,7, Olufunmilola Oyebamiji2, Sayali Talware2, Sharmila Selvaraj2, Preethi Krishnan3,6, Farooq Syed1,6,7, Huanmei Wu2, Carmella Evans-Molina 1,3,4,5,6,7,8* Departments of 1Pediatrics, 3Medicine, 4Anatomy, Cell Biology & Physiology, 5Biochemistry & Molecular Biology, the 6Center for Diabetes & Metabolic Diseases, and the 7Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202; 2Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202; 8Roudebush VA Medical Center, Indianapolis, IN 46202. *Corresponding Author(s): Carmella Evans-Molina, MD, PhD ([email protected]) Indiana University School of Medicine, 635 Barnhill Drive, MS 2031A, Indianapolis, IN 46202, Telephone: (317) 274-4145, Fax (317) 274-4107 Running Title: Golgi Stress Response in Diabetes Word Count: 4358 Number of Figures: 6 Keywords: Golgi apparatus stress, Islets, β cell, Type 1 diabetes, Type 2 diabetes 1 Diabetes Publish Ahead of Print, published online August 20, 2020 Diabetes Page 2 of 781 ABSTRACT The Golgi apparatus (GA) is an important site of insulin processing and granule maturation, but whether GA organelle dysfunction and GA stress are present in the diabetic β-cell has not been tested. We utilized an informatics-based approach to develop a transcriptional signature of β-cell GA stress using existing RNA sequencing and microarray datasets generated using human islets from donors with diabetes and islets where type 1(T1D) and type 2 diabetes (T2D) had been modeled ex vivo. To narrow our results to GA-specific genes, we applied a filter set of 1,030 genes accepted as GA associated. -
European School of Genetic Medicine Eye Genetics
European School of Genetic Medicine th 4 Course in Eye Genetics Bertinoro, Italy, September 27-29, 2015 Bertinoro University Residential Centre Via Frangipane, 6 – Bertinoro www.ceub.it Course Directors: R. Allikmets (Columbia University, New York) A. Ciardella (U.O. Oftalmologia, Policlinico Sant’ Orsola, Bologna) B. P. Leroy (Ghent University, Ghent) M. Seri (U.O Genetica Medica, Bologna). th 4 Course in Eye Genetics Bertinoro, Italy, September 27-29, 2015 CONTENTS PROGRAMME 3 ABSTRACTS OF LECTURES 6 ABSTRACTS OF STUDENTS POSTERS 26 STUDENTS WHO IS WHO 39 FACULTY WHO IS WHO 41 2 4TH COURSE IN EYE GENETICS Bertinoro University Residential Centre Bertinoro, Italy, September 27-29, 2015 Arrival day: Saturday, September 26th September 27 8:30 - 8:40 Welcome 8:40 - 9:10 History of Medical Genetics Giovanni Romeo 9:15 - 10:00 2 parallel talks: (40 min + 5 min discussion) Garrison Room 1. Overview of clinical ophthalmology for basic scientists Antonio Ciardella Jacopo da Bertinoro Room 2. Overview of basic medical genetics for ophthalmologists Bart Leroy 10:05 - 11:35 2 talks (40 min + 5 min discussion) 3. Stargardt disease, the complex simple retinal disorder Rando Allikmets 4. Overview of inherited corneal disorders Graeme Black 11:35 - 12:00 Break 12:00 - 13:30 2 talks (40 min + 5 min discussion) 1. Molecular basis of non-syndromic and syndromic retinal and vitreoretinal diseases Wolfgang Berger 2. Introduction to next-generation sequencing for eye diseases Lonneke Haer-Wigman 13:30 - 14:30 Lunch 14:30 - 16:15 3 parallel workshops -
Ciliopathy-Associated Gene Cc2d2a Promotes Assembly of Subdistal Appendages on the Mother Centriole During Cilia Biogenesis
ARTICLE Received 7 Apr 2014 | Accepted 23 May 2014 | Published 20 Jun 2014 DOI: 10.1038/ncomms5207 Ciliopathy-associated gene Cc2d2a promotes assembly of subdistal appendages on the mother centriole during cilia biogenesis Shobi Veleri1, Souparnika H. Manjunath1, Robert N. Fariss2, Helen May-Simera1, Matthew Brooks1, Trevor A. Foskett1, Chun Gao2, Teresa A. Longo1, Pinghu Liu3, Kunio Nagashima4, Rivka A. Rachel1, Tiansen Li1, Lijin Dong3 & Anand Swaroop1 The primary cilium originates from the mother centriole and participates in critical functions during organogenesis. Defects in cilia biogenesis or function lead to pleiotropic phenotypes. Mutations in centrosome-cilia gene CC2D2A result in Meckel and Joubert syndromes. Here we generate a Cc2d2a À / À mouse that recapitulates features of Meckel syndrome including embryonic lethality and multiorgan defects. Cilia are absent in Cc2d2a À / À embryonic node and other somatic tissues; disruption of cilia-dependent Shh signalling appears to underlie exencephaly in mutant embryos. The Cc2d2a À / À mouse embryonic fibroblasts (MEFs) lack cilia, although mother centrioles and pericentriolar pro- teins are detected. Odf2, associated with subdistal appendages, is absent and ninein is reduced in mutant MEFs. In Cc2d2a À / À MEFs, subdistal appendages are lacking or abnormal by transmission electron microscopy. Consistent with this, CC2D2A localizes to subdistal appendages by immuno-EM in wild-type cells. We conclude that CC2D2A is essential for the assembly of subdistal appendages, which anchor cytoplasmic microtubules and prime the mother centriole for axoneme biogenesis. 1 Neurobiology-Neurodegeneration and Repair Laboratory, National Eye Institute, NIH, Bethesda, Maryland 20892, USA. 2 Biological Imaging Core, National Eye Institute, NIH, Bethesda, Maryland 20892, USA. -
Ciliopathies Gene Panel
Ciliopathies Gene Panel Contact details Introduction Regional Genetics Service The ciliopathies are a heterogeneous group of conditions with considerable phenotypic overlap. Levels 4-6, Barclay House These inherited diseases are caused by defects in cilia; hair-like projections present on most 37 Queen Square cells, with roles in key human developmental processes via their motility and signalling functions. Ciliopathies are often lethal and multiple organ systems are affected. Ciliopathies are London, WC1N 3BH united in being genetically heterogeneous conditions and the different subtypes can share T +44 (0) 20 7762 6888 many clinical features, predominantly cystic kidney disease, but also retinal, respiratory, F +44 (0) 20 7813 8578 skeletal, hepatic and neurological defects in addition to metabolic defects, laterality defects and polydactyly. Their clinical variability can make ciliopathies hard to recognise, reflecting the ubiquity of cilia. Gene panels currently offer the best solution to tackling analysis of genetically Samples required heterogeneous conditions such as the ciliopathies. Ciliopathies affect approximately 1:2,000 5ml venous blood in plastic EDTA births. bottles (>1ml from neonates) Ciliopathies are generally inherited in an autosomal recessive manner, with some autosomal Prenatal testing must be arranged dominant and X-linked exceptions. in advance, through a Clinical Genetics department if possible. Referrals Amniotic fluid or CV samples Patients presenting with a ciliopathy; due to the phenotypic variability this could be a diverse set should be sent to Cytogenetics for of features. For guidance contact the laboratory or Dr Hannah Mitchison dissecting and culturing, with ([email protected]) / Prof Phil Beales ([email protected]) instructions to forward the sample to the Regional Molecular Genetics Referrals will be accepted from clinical geneticists and consultants in nephrology, metabolic, laboratory for analysis respiratory and retinal diseases. -
Phosphoinositide 3-Kinase-C2α Regulates Polycystin-2 Ciliary Entry
BASIC RESEARCH www.jasn.org Phosphoinositide 3-Kinase-C2a Regulates Polycystin-2 Ciliary Entry and Protects against Kidney Cyst Formation † Irene Franco,* Jean Piero Margaria,* Maria Chiara De Santis,* Andrea Ranghino, ‡ Daniel Monteyne, Marco Chiaravalli,§ Monika Pema,§ Carlo Cosimo Campa,* ‡| Edoardo Ratto,* Federico Gulluni,* David Perez-Morga, Stefan Somlo,¶ Giorgio R. Merlo,* Alessandra Boletta,§ and Emilio Hirsch* *Molecular Biotechnology Center, Department of Molecular Biotechnology and Health Sciences, University of Torino, Turin, Italy; †Renal Transplantation Center “A. Vercellone”, Division of Nephrology, Dialysis and Transplantation, Department of Medical Sciences, Città della Salute e della Scienza, Hospital and Research Center for Experimental Medicine (CeRMS) and Center for Molecular Biotechnology, University of Torino, Turin, Italy; ‡Laboratoire de Parasitologie Moléculaire, Institut de Biologie et de Médecine Moléculaires (IBMM), Université Libre de Bruxelles, Gosselies, Charleroi, Belgium; §Division of Genetics and Cell Biology, Dibit San Raffaele Scientific Institute, Milan, Italy; |Center for Microscopy and Molecular Imaging (CMMI), Université Libre de Bruxelles, Gosselies, Belgium; and ¶Section of Nephrology, Yale University School of Medicine, New Haven, Connecticut. ABSTRACT Signaling from the primary cilium regulates kidney tubule development and cyst formation. However, the mechanism controlling targeting of ciliary components necessary for cilium morphogenesis and signaling is largely unknown. Here, we studied the function of class II phosphoinositide 3-kinase-C2a (PI3K-C2a)inrenal tubule-derived inner medullary collecting duct 3 cells and show that PI3K-C2a resides at the recycling endo- some compartment in proximity to the primary cilium base. In this subcellular location, PI3K-C2a controlled the activation of Rab8, a key mediator of cargo protein targeting to the primary cilium. -
De Novo, Systemic, Deleterious Amino Acid Substitutions Are Common in Large Cytoskeleton‑Related Protein Coding Regions
BIOMEDICAL REPORTS 6: 211-216, 2017 De novo, systemic, deleterious amino acid substitutions are common in large cytoskeleton‑related protein coding regions REBECCA J. STOLL1, GRACE R. THOMPSON1, MOHAMMAD D. SAMY1 and GEORGE BLANCK1,2 1Department of Molecular Medicine, Morsani College of Medicine, University of South Florida; 2Immunology Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA Received June 13, 2016; Accepted October 31, 2016 DOI: 10.3892/br.2016.826 Abstract. Human mutagenesis is largely random, thus large Introduction coding regions, simply on the basis of probability, represent relatively large mutagenesis targets. Thus, we considered Genetic damage is largely random and therefore tends to the possibility that large cytoskeletal-protein related coding affect the larger, functional regions of the human genome regions (CPCRs), including extra-cellular matrix (ECM) more frequently than the smaller regions (1). For example, coding regions, would have systemic nucleotide variants that a systematic study has revealed that cancer fusion genes, on are not present in common SNP databases. Presumably, such average, are statistically, significantly larger than other human variants arose recently in development or in recent, preceding genes (2,3). The large introns of potential cancer fusion genes generations. Using matched breast cancer and blood-derived presumably allow for many different productive recombina- normal datasets from the cancer genome atlas, CPCR single tion opportunities, i.e., many recombinations that would allow nucleotide variants (SNVs) not present in the All SNPs(142) for exon juxtaposition and the generation of hybrid proteins. or 1000 Genomes databases were identified. Using the Protein Smaller cancer fusion genes tend to be associated with the rare Variation Effect Analyzer internet-based tool, it was discov- types of cancer, for example EWS RNA binding protein 1 in ered that apparent, systemic mutations (not shared among Ewing's sarcoma.