The Genetics of Intellectual Disability: Whole Exome Sequencing to Find Causative Variants in Severe Cases
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Increased Expression of Dedicator-Cytokinesis-10, Caspase
Agirrezabal et al. Multiple Sclerosis and Demyelinating Disorders (2016) 1:7 Multiple Sclerosis and DOI 10.1186/s40893-016-0009-8 Demyelinating Disorders RESEARCH ARTICLE Open Access Increased expression of dedicator- cytokinesis-10, caspase-2 and Synaptotagmin-like 2 is associated with clinical disease activity in multiple sclerosis Ion Agirrezabal1, Ricardo Palacios1, Beatriz Moreno1, Jorge Sepulcre2, Alice Abernathy1, Albert Saiz1, Sara Llufriu1, Manuel Comabella3, Xavier Montalban3, Antonio Martinez4, David Arteta4 and Pablo Villoslada1,5* Abstract Background: We aim to identify differentially expressed genes (DEGs) and its pathways associated with clinical activity of relapsing–remitting Multiple Sclerosis (RRMS). Methods: We screened DEG in blood samples from patients with clinically stable or active RRMS (≥2 relapses or increase in ≥1 point in the EDSS (due to relapses) in 2 years follow-up), and healthy controls using DNA arrays. The DEGs identified were validated by RT-PCR in a prospective cohort of MS patients. We used Gene Ontology (GO) analysis for identifying the associated pathways and Jaspar database for identifying the associated transcriptions factors. Results: We identified 45 DEG between the three groups (stable RRMS, active RRMS and control), being 14 of them significantly different between stable and active RRMS. We validated 14 out of the 45 DEG in the second cohort, eight out of the 14 being differentially expressed between active and stable patients (ARHGEF7, CASP2, DOCK10, DSP, ITPR1, KLDHC5, RBBP4, SYTL2). We found an overrepresentation of several pathways associated with lymphocyte activation. The analysis of regulatory networks identified the gene triplet of Dedicator of Cytokinesis-10 (DOCK10) – Caspase-2 (CASP2) - Synaptotagmin-like 2 (SYTL2) as being co-regulated by common transcription factors, pointing to lymphocyte activation pathways associated with disease activity. -
A Network of Bhlhzip Transcription Factors in Melanoma: Interactions of MITF, TFEB and TFE3
A network of bHLHZip transcription factors in melanoma: Interactions of MITF, TFEB and TFE3 Josué A. Ballesteros Álvarez Thesis for the degree of Philosophiae Doctor January 2019 Net bHLHZip umritunarþátta í sortuæxlum: Samstarf milli MITF, TFEB og TFE3 Josué A. Ballesteros Álvarez Ritgerð til doktorsgráðu Leiðbeinandi/leiðbeinendur: Eiríkur Steingrímsson Doktorsnefnd: Margrét H. Ögmundsdóttir Þórarinn Guðjónsson Jórunn E. Eyfjörð Lars Rönnstrand Janúar 2019 Thesis for a doctoral degree at tHe University of Iceland. All rigHts reserved. No Part of tHis Publication may be reProduced in any form witHout tHe Prior permission of the copyright holder. © Josue A. Ballesteros Álvarez. 2019 ISBN 978-9935-9421-4-2 Printing by HáskólaPrent Reykjavik, Iceland 2019 Ágrip StjórnPróteinin MITF , TFEB, TFE3 og TFEC (stundum nefnd MiT-TFE þættirnir) tilheyra bHLHZip fjölskyldu umritunarþátta sem bindast DNA og stjórna tjáningu gena. MITF er mikilvægt fyrir myndun og starfsemi litfruma en ættingjar þess, TFEB og TFE3, stjórna myndun og starfsemi lysósóma og sjálfsáti. Sjálfsát er líffræðilegt ferli sem gegnir mikilvægu hlutverki í starfsemi fruma en getur einnig haft áHrif á myndun og meðHöndlun sjúkdóma. Í verkefni þessu var samstarf MITF, TFE3 og TFEB Próteinanna skoðað í sortuæxlisfrumum og hvaða áhrif þau Hafa á tjáningu hvers annars. Eins og MITF eru TFEB og TFE3 genin tjáð í sortuæxlisfrumum og sortuæxlum; TFEC er ekki tjáð í þessum frumum og var því ekki skoðað í þessu verkefni. Með notkun sérvirkra hindra var sýnt að boðleiðir hafa áhrif á staðsetningu próteinanna þriggja í sortuæxlisfrumum. Umritunarþættir þessir geta bundist skyldum DNA-bindisetum og haft áhrif á tjáningu gena sem eru nauðsynleg fyrir myndun bæði lýsósóma og melanósóma. -
Exophilin-5 Regulates Allergic Airway Inflammation by Controlling IL-33–Mediated Th2 Responses
The Journal of Clinical Investigation RESEARCH ARTICLE Exophilin-5 regulates allergic airway inflammation by controlling IL-33–mediated Th2 responses Katsuhide Okunishi,1 Hao Wang,1 Maho Suzukawa,2,3 Ray Ishizaki,1 Eri Kobayashi,1 Miho Kihara,4 Takaya Abe,4,5 Jun-ichi Miyazaki,6 Masafumi Horie,7 Akira Saito,7 Hirohisa Saito,8 Susumu Nakae,9 and Tetsuro Izumi1 1Laboratory of Molecular Endocrinology and Metabolism, Department of Molecular Medicine, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan. 2National Hospital Organization Tokyo National Hospital, Tokyo, Japan. 3Division of Respiratory Medicine and Allergology, Department of Medicine, Teikyo University School of Medicine, Tokyo, Japan. 4Laboratory for Animal Resource Development and 5Genetic Engineering, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan. 6Institute of Scientific and Industrial Research, Osaka University, Osaka, Japan. 7Department of Respiratory Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan. 8Department of Allergy and Clinical Immunology, National Research Institute for Child Health and Development, Tokyo, Japan. 9Laboratory of Systems Biology, Center for Experimental Medicine and Systems Biology, Institute of Medical Science, The University of Tokyo, Tokyo, Japan. A common variant in the RAB27A gene in adults was recently found to be associated with the fractional exhaled nitric oxide level, a marker of eosinophilic airway inflammation. The small GTPase Rab27 is known to regulate intracellular vesicle traffic, although its role in allergic responses is unclear. We demonstrated that exophilin-5, a Rab27-binding protein, was predominantly expressed in both of the major IL-33 producers, lung epithelial cells, and the specialized IL-5 and IL-13 producers in the CD44hiCD62LloCXCR3lo pathogenic Th2 cell population in mice. -
Analysis of the Indacaterol-Regulated Transcriptome in Human Airway
Supplemental material to this article can be found at: http://jpet.aspetjournals.org/content/suppl/2018/04/13/jpet.118.249292.DC1 1521-0103/366/1/220–236$35.00 https://doi.org/10.1124/jpet.118.249292 THE JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS J Pharmacol Exp Ther 366:220–236, July 2018 Copyright ª 2018 by The American Society for Pharmacology and Experimental Therapeutics Analysis of the Indacaterol-Regulated Transcriptome in Human Airway Epithelial Cells Implicates Gene Expression Changes in the s Adverse and Therapeutic Effects of b2-Adrenoceptor Agonists Dong Yan, Omar Hamed, Taruna Joshi,1 Mahmoud M. Mostafa, Kyla C. Jamieson, Radhika Joshi, Robert Newton, and Mark A. Giembycz Departments of Physiology and Pharmacology (D.Y., O.H., T.J., K.C.J., R.J., M.A.G.) and Cell Biology and Anatomy (M.M.M., R.N.), Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada Received March 22, 2018; accepted April 11, 2018 Downloaded from ABSTRACT The contribution of gene expression changes to the adverse and activity, and positive regulation of neutrophil chemotaxis. The therapeutic effects of b2-adrenoceptor agonists in asthma was general enriched GO term extracellular space was also associ- investigated using human airway epithelial cells as a therapeu- ated with indacaterol-induced genes, and many of those, in- tically relevant target. Operational model-fitting established that cluding CRISPLD2, DMBT1, GAS1, and SOCS3, have putative jpet.aspetjournals.org the long-acting b2-adrenoceptor agonists (LABA) indacaterol, anti-inflammatory, antibacterial, and/or antiviral activity. Numer- salmeterol, formoterol, and picumeterol were full agonists on ous indacaterol-regulated genes were also induced or repressed BEAS-2B cells transfected with a cAMP-response element in BEAS-2B cells and human primary bronchial epithelial cells by reporter but differed in efficacy (indacaterol $ formoterol . -
The Landscape of Human Mutually Exclusive Splicing
bioRxiv preprint doi: https://doi.org/10.1101/133215; this version posted May 2, 2017. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-ND 4.0 International license. The landscape of human mutually exclusive splicing Klas Hatje1,2,#,*, Ramon O. Vidal2,*, Raza-Ur Rahman2, Dominic Simm1,3, Björn Hammesfahr1,$, Orr Shomroni2, Stefan Bonn2§ & Martin Kollmar1§ 1 Group of Systems Biology of Motor Proteins, Department of NMR-based Structural Biology, Max-Planck-Institute for Biophysical Chemistry, Göttingen, Germany 2 Group of Computational Systems Biology, German Center for Neurodegenerative Diseases, Göttingen, Germany 3 Theoretical Computer Science and Algorithmic Methods, Institute of Computer Science, Georg-August-University Göttingen, Germany § Corresponding authors # Current address: Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Basel, Switzerland $ Current address: Research and Development - Data Management (RD-DM), KWS SAAT SE, Einbeck, Germany * These authors contributed equally E-mail addresses: KH: [email protected], RV: [email protected], RR: [email protected], DS: [email protected], BH: [email protected], OS: [email protected], SB: [email protected], MK: [email protected] - 1 - bioRxiv preprint doi: https://doi.org/10.1101/133215; this version posted May 2, 2017. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. -
A Set of Regulatory Genes Co-Expressed in Embryonic Human Brain Is Implicated in Disrupted Speech Development
Molecular Psychiatry https://doi.org/10.1038/s41380-018-0020-x ARTICLE A set of regulatory genes co-expressed in embryonic human brain is implicated in disrupted speech development 1 1 1 2 3 Else Eising ● Amaia Carrion-Castillo ● Arianna Vino ● Edythe A. Strand ● Kathy J. Jakielski ● 4,5 6 7 8 9 Thomas S. Scerri ● Michael S. Hildebrand ● Richard Webster ● Alan Ma ● Bernard Mazoyer ● 1,10 4,5 6,11 6,12 13 Clyde Francks ● Melanie Bahlo ● Ingrid E. Scheffer ● Angela T. Morgan ● Lawrence D. Shriberg ● Simon E. Fisher 1,10 Received: 22 September 2017 / Revised: 3 December 2017 / Accepted: 2 January 2018 © The Author(s) 2018. This article is published with open access Abstract Genetic investigations of people with impaired development of spoken language provide windows into key aspects of human biology. Over 15 years after FOXP2 was identified, most speech and language impairments remain unexplained at the molecular level. We sequenced whole genomes of nineteen unrelated individuals diagnosed with childhood apraxia of speech, a rare disorder enriched for causative mutations of large effect. Where DNA was available from unaffected parents, CHD3 SETD1A WDR5 fi 1234567890();,: we discovered de novo mutations, implicating genes, including , and . In other probands, we identi ed novel loss-of-function variants affecting KAT6A, SETBP1, ZFHX4, TNRC6B and MKL2, regulatory genes with links to neurodevelopment. Several of the new candidates interact with each other or with known speech-related genes. Moreover, they show significant clustering within a single co-expression module of genes highly expressed during early human brain development. This study highlights gene regulatory pathways in the developing brain that may contribute to acquisition of proficient speech. -
Elucidating Biological Roles of Novel Murine Genes in Hearing Impairment in Africa
Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 19 September 2019 doi:10.20944/preprints201909.0222.v1 Review Elucidating Biological Roles of Novel Murine Genes in Hearing Impairment in Africa Oluwafemi Gabriel Oluwole,1* Abdoulaye Yal 1,2, Edmond Wonkam1, Noluthando Manyisa1, Jack Morrice1, Gaston K. Mazanda1 and Ambroise Wonkam1* 1Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, South Africa. 2Department of Neurology, Point G Teaching Hospital, University of Sciences, Techniques and Technology, Bamako, Mali. *Correspondence to: [email protected]; [email protected] Abstract: The prevalence of congenital hearing impairment (HI) is highest in Africa. Estimates evaluated genetic causes to account for 31% of HI cases in Africa, but the identification of associated causative genes mutations have been challenging. In this study, we reviewed the potential roles, in humans, of 38 novel genes identified in a murine study. We gathered information from various genomic annotation databases and performed functional enrichment analysis using online resources i.e. genemania and g.proflier. Results revealed that 27/38 genes are express mostly in the brain, suggesting additional cognitive roles. Indeed, HERC1- R3250X had been associated with intellectual disability in a Moroccan family. A homozygous 216-bp deletion in KLC2 was found in two siblings of Egyptian descent with spastic paraplegia. Up to 27/38 murine genes have link to at least a disease, and the commonest mode of inheritance is autosomal recessive (n=8). Network analysis indicates that 20 other genes have intermediate and biological links to the novel genes, suggesting their possible roles in HI. -
Rab27a and Rab27b Control Different Steps of the Exosome Secretion Pathway
ARTICLES Rab27a and Rab27b control different steps of the exosome secretion pathway Matias Ostrowski1,2, Nuno B. Carmo3,12, Sophie Krumeich1,2,12, Isabelle Fanget10,12, Graça Raposo4,2, Ariel Savina1,2, Catarina F. Moita3, Kristine Schauer4,2, Alistair N. Hume5, Rui P. Freitas3, Bruno Goud4,2, Philippe Benaroch1,2, Nir Hacohen8,9, Mitsunori Fukuda11, Claire Desnos10, Miguel C. Seabra5,6,7, François Darchen10, Sebastian Amigorena1,2, Luis F. Moita3,13 and Clotilde Thery1,2,13 Exosomes are secreted membrane vesicles that share structural and biochemical characteristics with intraluminal vesicles of multivesicular endosomes (MVEs). Exosomes could be involved in intercellular communication and in the pathogenesis of infectious and degenerative diseases. The molecular mechanisms of exosome biogenesis and secretion are, however, poorly understood. Using an RNA interference (RNAi) screen, we identified five Rab GTPases that promote exosome secretion in HeLa cells. Among these, Rab27a and Rab27b were found to function in MVE docking at the plasma membrane. The size of MVEs was strongly increased by Rab27a silencing, whereas MVEs were redistributed towards the perinuclear region upon Rab27b silencing. Thus, the two Rab27 isoforms have different roles in the exosomal pathway. In addition, silencing two known Rab27 effectors, Slp4 (also known as SYTL4, synaptotagmin-like 4) and Slac2b (also known as EXPH5, exophilin 5), inhibited exosome secretion and phenocopied silencing of Rab27a and Rab27b, respectively. Our results therefore strengthen the link between MVEs and exosomes, and introduce ways of manipulating exosome secretion in vivo. Exosomes are membrane vesicles secreted into the extracellular space membrane of MVEs into the lumen of these endosomes14. -
A High-Throughput Approach to Uncover Novel Roles of APOBEC2, a Functional Orphan of the AID/APOBEC Family
Rockefeller University Digital Commons @ RU Student Theses and Dissertations 2018 A High-Throughput Approach to Uncover Novel Roles of APOBEC2, a Functional Orphan of the AID/APOBEC Family Linda Molla Follow this and additional works at: https://digitalcommons.rockefeller.edu/ student_theses_and_dissertations Part of the Life Sciences Commons A HIGH-THROUGHPUT APPROACH TO UNCOVER NOVEL ROLES OF APOBEC2, A FUNCTIONAL ORPHAN OF THE AID/APOBEC FAMILY A Thesis Presented to the Faculty of The Rockefeller University in Partial Fulfillment of the Requirements for the degree of Doctor of Philosophy by Linda Molla June 2018 © Copyright by Linda Molla 2018 A HIGH-THROUGHPUT APPROACH TO UNCOVER NOVEL ROLES OF APOBEC2, A FUNCTIONAL ORPHAN OF THE AID/APOBEC FAMILY Linda Molla, Ph.D. The Rockefeller University 2018 APOBEC2 is a member of the AID/APOBEC cytidine deaminase family of proteins. Unlike most of AID/APOBEC, however, APOBEC2’s function remains elusive. Previous research has implicated APOBEC2 in diverse organisms and cellular processes such as muscle biology (in Mus musculus), regeneration (in Danio rerio), and development (in Xenopus laevis). APOBEC2 has also been implicated in cancer. However the enzymatic activity, substrate or physiological target(s) of APOBEC2 are unknown. For this thesis, I have combined Next Generation Sequencing (NGS) techniques with state-of-the-art molecular biology to determine the physiological targets of APOBEC2. Using a cell culture muscle differentiation system, and RNA sequencing (RNA-Seq) by polyA capture, I demonstrated that unlike the AID/APOBEC family member APOBEC1, APOBEC2 is not an RNA editor. Using the same system combined with enhanced Reduced Representation Bisulfite Sequencing (eRRBS) analyses I showed that, unlike the AID/APOBEC family member AID, APOBEC2 does not act as a 5-methyl-C deaminase. -
Article Zebrafish Melanophilin Facilitates Melanosome Dispersion
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Current Biology 17, 1721–1734, October 23, 2007 ª2007 Elsevier Ltd All rights reserved DOI 10.1016/j.cub.2007.09.028 Article Zebrafish Melanophilin Facilitates Melanosome Dispersion by Regulating Dynein Lavinia Sheets,1 David G. Ransom,1 Eve M. Mellgren,2 accomplish this by either aggregating or dispersing their Stephen L. Johnson,2 and Bruce J. Schnapp1,* membrane-bound pigment granules, called melano- 1Department of Cell and Developmental Biology somes, depending on the level of intracellular cAMP. Al- Oregon Health and Science University though these cells have been used for many years for in- Basic Science Building Room 5365 vestigating intracellular transport regulation [1], it is not 3181 SW Sam Jackson Park Road understood how cAMP regulates the molecular motors Portland, Oregon 97201-3098 responsible for melanosome transport. Here, we have 2Department of Genetics used zebrafish to identify and characterize a gene prod- Washington University School of Medicine uct that regulates melanosome motors downstream of St. Louis, Missouri 63110 cAMP. Melanocyte microtubules are arrayed with their minus ends at the cell center; hence, the minus-end motor cy- Summary toplasmic dynein carries melanosomes inward, leading to aggregation [2, 3], whereas the plus-end motor kine- Background: Fish melanocytes aggregate or disperse sin-2 carries melanosomes outward, leading to disper- their melanosomes in response to the level of intracellu- sion [4]. Melanosomes also interact with myosin V, lar cAMP. The role of cAMP is to regulate both melano- which switches their transport from microtubules to ac- some travel along microtubules and their transfer tin filaments [2, 5, 6]. -
Refractory Seizure in a Patient with Griscelli Syndrome: a Unique Case with One Mutation and a Novel Deletion
Open Access Case Report DOI: 10.7759/cureus.14402 Refractory Seizure in a Patient With Griscelli Syndrome: A Unique Case With One Mutation and a Novel Deletion Juan Fernando Ortiz 1, 2 , Samir Ruxmohan 3 , Ivan Mateo Alzamora 4 , Amrapali Patel 5 , Ahmed Eissa- Garcés 1 1. Neurology, Universidad San Francisco de Quito, Quito, ECU 2. Neurology, Larkin Community Hospital, Miami, USA 3. Neurology, Larkin Community Hospital, Miami, Florida, USA 4. Medicine, Universidad San Francisco de Quito, Quito, ECU 5. Public Health, George Washington University, Washington, USA Corresponding author: Juan Fernando Ortiz, [email protected] Abstract Griscelli syndrome (GS) is a rare syndrome characterized by hypopigmentation, immunodeficiency, and neurological features. The genes Ras-related protein (RAB27A) and Myosin-Va (MYO5A) are involved in this condition's pathogenesis. We present a GS type 1 (GS1) case with developmental delay, hypotonia, and refractory seizures despite multiple medications, which included clobazam, cannabinol, zonisamide, and a ketogenic diet. Lacosamide and levetiracetam were added to the treatment regimen, which decreased the seizures' frequency from 10 per day to five per day. The patient had an MYO5A mutation and, remarkably, a deletion on 18p11.32p11.31. The deletion was previously reported in a patient with refractory seizures and developmental delay. We reviewed all cases of GS that presented with seizures. We reviewed other cases of GS and seizures described in the literature and explored possible seizure mechanisms in GS. Seizure in GS1 seems to be related directly to the MYO5A mutation. The neurological manifestations in GS2 seem to be caused indirectly by the accelerated phase of Hemophagocytic syndrome (HPS), which is characteristic of GS2. -
GS3) Or a MYO5A F-Exon Deletion (GS1
Griscelli syndrome restricted to hypopigmentation results from a melanophilin defect (GS3) or a MYO5A F-exon deletion (GS1) Gaël Ménasché, Chen Hsuan Ho, Ozden Sanal, Jerome Feldmann, Ilhan Tezcan, Fügen Ersoy, Anne Houdusse, Alain Fischer, Geneviève de Saint Basile To cite this version: Gaël Ménasché, Chen Hsuan Ho, Ozden Sanal, Jerome Feldmann, Ilhan Tezcan, et al.. Griscelli syndrome restricted to hypopigmentation results from a melanophilin defect (GS3) or a MYO5A F- exon deletion (GS1). Journal of Clinical Investigation, American Society for Clinical Investigation, 2003, 112 (3), pp.450-456. 10.1172/JCI18264. inserm-02440362 HAL Id: inserm-02440362 https://www.hal.inserm.fr/inserm-02440362 Submitted on 31 Jan 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Griscelli syndrome restricted to hypopigmentation results from a melanophilin defect (GS3) or a MYO5A F-exon deletion (GS1) Gaël Ménasché,1 Chen Hsuan Ho,1 Ozden Sanal,2 Jérôme Feldmann,1 Ilhan Tezcan,2 Fügen Ersoy,2 Anne Houdusse,3 Alain Fischer,1 and Geneviève de Saint Basile1 1Unité