RT² Profiler PCR Array (Rotor-Gene® Format) Human Glycosylation
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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. -
Down Regulation of Membrane-Bound Neu3 Constitutes a New
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Publications of the IAS Fellows IJC International Journal of Cancer Down regulation of membrane-bound Neu3 constitutes a new potential marker for childhood acute lymphoblastic leukemia and induces apoptosis suppression of neoplastic cells Chandan Mandal1, Cristina Tringali2, Susmita Mondal1, Luigi Anastasia2, Sarmila Chandra3, Bruno Venerando2 and Chitra Mandal1 1 Infectious Diseases and Immunology Division, Indian Institute of Chemical Biology, A Unit of Council of Scientific and Industrial Research, Govt of India, 4, Raja S. C. Mullick Road, Kolkata 700032, India 2 Department of Medical Chemistry, Biochemistry and Biotechnology, University of Milan, and IRCCS Policlinico San Donato, San Donato, Milan, Italy 3 Department of Hematology, Kothari Medical Centre, Kolkata 700027, India Membrane-linked sialidase Neu3 is a key enzyme for the extralysosomal catabolism of gangliosides. In this respect, it regulates pivotal cell surface events, including trans-membrane signaling, and plays an essential role in carcinogenesis. In this report, we demonstrated that acute lymphoblastic leukemia (ALL), lymphoblasts (primary cells from patients and cell lines) are characterized by a marked down-regulation of Neu3 in terms of both gene expression (230 to 40%) and enzymatic activity toward ganglioside GD1a (225.6 to 30.6%), when compared with cells from healthy controls. Induced overexpression of Neu3 in the ALL-cell line, MOLT-4, led to a significant increase of ceramide (166%) and to a parallel decrease of lactosylceramide (255%). These events strongly guided lymphoblasts to apoptosis, as we assessed by the decrease in Bcl2/ Bax ratio, the accumulation of Neu3 transfected cells in the sub G0–G1 phase of the cell cycle, the enhanced annexin-V positivity, the higher cleavage of procaspase-3. -
GM2 Gangliosidoses: Clinical Features, Pathophysiological Aspects, and Current Therapies
International Journal of Molecular Sciences Review GM2 Gangliosidoses: Clinical Features, Pathophysiological Aspects, and Current Therapies Andrés Felipe Leal 1 , Eliana Benincore-Flórez 1, Daniela Solano-Galarza 1, Rafael Guillermo Garzón Jaramillo 1 , Olga Yaneth Echeverri-Peña 1, Diego A. Suarez 1,2, Carlos Javier Alméciga-Díaz 1,* and Angela Johana Espejo-Mojica 1,* 1 Institute for the Study of Inborn Errors of Metabolism, Faculty of Science, Pontificia Universidad Javeriana, Bogotá 110231, Colombia; [email protected] (A.F.L.); [email protected] (E.B.-F.); [email protected] (D.S.-G.); [email protected] (R.G.G.J.); [email protected] (O.Y.E.-P.); [email protected] (D.A.S.) 2 Faculty of Medicine, Universidad Nacional de Colombia, Bogotá 110231, Colombia * Correspondence: [email protected] (C.J.A.-D.); [email protected] (A.J.E.-M.); Tel.: +57-1-3208320 (ext. 4140) (C.J.A.-D.); +57-1-3208320 (ext. 4099) (A.J.E.-M.) Received: 6 July 2020; Accepted: 7 August 2020; Published: 27 August 2020 Abstract: GM2 gangliosidoses are a group of pathologies characterized by GM2 ganglioside accumulation into the lysosome due to mutations on the genes encoding for the β-hexosaminidases subunits or the GM2 activator protein. Three GM2 gangliosidoses have been described: Tay–Sachs disease, Sandhoff disease, and the AB variant. Central nervous system dysfunction is the main characteristic of GM2 gangliosidoses patients that include neurodevelopment alterations, neuroinflammation, and neuronal apoptosis. Currently, there is not approved therapy for GM2 gangliosidoses, but different therapeutic strategies have been studied including hematopoietic stem cell transplantation, enzyme replacement therapy, substrate reduction therapy, pharmacological chaperones, and gene therapy. -
Salmonella Degrades the Host Glycocalyx Leading to Altered Infection and Glycan Remodeling
UC Davis UC Davis Previously Published Works Title Salmonella Degrades the Host Glycocalyx Leading to Altered Infection and Glycan Remodeling. Permalink https://escholarship.org/uc/item/0nk8n7xb Journal Scientific reports, 6(1) ISSN 2045-2322 Authors Arabyan, Narine Park, Dayoung Foutouhi, Soraya et al. Publication Date 2016-07-08 DOI 10.1038/srep29525 Peer reviewed eScholarship.org Powered by the California Digital Library University of California www.nature.com/scientificreports OPEN Salmonella Degrades the Host Glycocalyx Leading to Altered Infection and Glycan Remodeling Received: 09 February 2016 Narine Arabyan1, Dayoung Park2, Soraya Foutouhi1, Allison M. Weis1, Bihua C. Huang1, Accepted: 17 June 2016 Cynthia C. Williams2, Prerak Desai1,†, Jigna Shah1,‡, Richard Jeannotte1,3,§, Nguyet Kong1, Published: 08 July 2016 Carlito B. Lebrilla2,4 & Bart C. Weimer1 Complex glycans cover the gut epithelial surface to protect the cell from the environment. Invasive pathogens must breach the glycan layer before initiating infection. While glycan degradation is crucial for infection, this process is inadequately understood. Salmonella contains 47 glycosyl hydrolases (GHs) that may degrade the glycan. We hypothesized that keystone genes from the entire GH complement of Salmonella are required to degrade glycans to change infection. This study determined that GHs recognize the terminal monosaccharides (N-acetylneuraminic acid (Neu5Ac), galactose, mannose, and fucose) and significantly (p < 0.05) alter infection. During infection, Salmonella used its two GHs sialidase nanH and amylase malS for internalization by targeting different glycan structures. The host glycans were altered during Salmonella association via the induction of N-glycan biosynthesis pathways leading to modification of host glycans by increasing fucosylation and mannose content, while decreasing sialylation. -
(12) Patent Application Publication (10) Pub. No.: US 2003/0082511 A1 Brown Et Al
US 20030082511A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2003/0082511 A1 Brown et al. (43) Pub. Date: May 1, 2003 (54) IDENTIFICATION OF MODULATORY Publication Classification MOLECULES USING INDUCIBLE PROMOTERS (51) Int. Cl." ............................... C12O 1/00; C12O 1/68 (52) U.S. Cl. ..................................................... 435/4; 435/6 (76) Inventors: Steven J. Brown, San Diego, CA (US); Damien J. Dunnington, San Diego, CA (US); Imran Clark, San Diego, CA (57) ABSTRACT (US) Correspondence Address: Methods for identifying an ion channel modulator, a target David B. Waller & Associates membrane receptor modulator molecule, and other modula 5677 Oberlin Drive tory molecules are disclosed, as well as cells and vectors for Suit 214 use in those methods. A polynucleotide encoding target is San Diego, CA 92121 (US) provided in a cell under control of an inducible promoter, and candidate modulatory molecules are contacted with the (21) Appl. No.: 09/965,201 cell after induction of the promoter to ascertain whether a change in a measurable physiological parameter occurs as a (22) Filed: Sep. 25, 2001 result of the candidate modulatory molecule. Patent Application Publication May 1, 2003 Sheet 1 of 8 US 2003/0082511 A1 KCNC1 cDNA F.G. 1 Patent Application Publication May 1, 2003 Sheet 2 of 8 US 2003/0082511 A1 49 - -9 G C EH H EH N t R M h so as se W M M MP N FIG.2 Patent Application Publication May 1, 2003 Sheet 3 of 8 US 2003/0082511 A1 FG. 3 Patent Application Publication May 1, 2003 Sheet 4 of 8 US 2003/0082511 A1 KCNC1 ITREXCHO KC 150 mM KC 2000000 so 100 mM induced Uninduced Steady state O 100 200 300 400 500 600 700 Time (seconds) FIG. -
Characterization of the Human Sialidase Neu4 Gene Promoter
Turkish Journal of Biology Turk J Biol (2014) 38: 574-580 http://journals.tubitak.gov.tr/biology/ © TÜBİTAK Research Article doi:10.3906/biy-1401-63 Characterization of the human sialidase Neu4 gene promoter 1, 2 Volkan SEYRANTEPE *, Murat DELMAN 1 Department of Molecular Biology and Genetics, İzmir Institute of Technology, Urla İzmir, Turkey 2 Biotechnology and Bioengineering Graduate Program, İzmir Institute of Technology, Urla, İzmir, Turkey Received: 21.01.2014 Accepted: 08.05.2014 Published Online: 05.09.2014 Printed: 30.09.2014 Abstract: There are 4 different sialidases that have been described in humans: lysosomal (Neu1), cytoplasmic (Neu2), plasma membrane (Neu3), and lysosomal/mitochondrial (Neu4). Previously, we have shown that Neu4 has a broad substrate specificity and is active against glyco-conjugates, including GM2 ganglioside, at the acidic pH of 3.2. An overexpression of Neu4 in transfected neuroglia cells from a Tay–Sachs patient shows a clearance of accumulated GM2, indicating the biological importance of Neu4. In this paper, we aimed to characterize a minimal promoter region of the human Neu4 gene in order to understand the molecular mechanism regulating its expression. We cloned 7 different DNA fragments from the human Neu4 promoter region into luciferase expression vectors for a reporter assay and also performed an electrophoretic mobility shift assay to demonstrate the binding of transcription factors. We demonstrated that –187 bp upstream of the Neu4 gene is a minimal promoter region for controlling transcription from the human Neu4 gene. The electrophoretic mobility shift assay showed that the minimal promoter region recruits a c-myc transcription factor, which might be responsible for regulation of Neu4 gene transcription. -
Brain Lipid Profiling of Triply Mouse Model with the Deficiencies of Sialidase Neu1, Neu4 and Β-Hexosaminidase a Enzymes
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by DSpace@IZTECH Institutional Repository BRAIN LIPID PROFILING OF TRIPLY MOUSE MODEL WITH THE DEFICIENCIES OF SIALIDASE NEU1, NEU4 AND β-HEXOSAMINIDASE A ENZYMES A Thesis Submitted to the Graduate School of Engineering and Sciences of İzmir Institute of Technology in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE in Molecular Biology and Genetics by Zehra Kevser PEKMEZCİ December 2011 İZMİR We approve the thesis of Zehra Kevser PEKMEZCİ ____________________________ Assoc. Prof. Dr. Volkan SEYRANTEPE Supervisor _________________________ Assoc. Prof. Dr. Yusuf BARAN Committee Member ______________________________ Assoc. Prof. Dr. Şermin GENÇ Committee Member 20 December 2011 _________________________________ ______________________________ Assoc. Prof. Dr. Ahmet KOÇ Prof. Dr. R. Tuğrul SENGER Head of the Department of Molecular Dean of the Graduate School of Biology and Genetics Engineering and Sciences ACKNOWLEDGMENTS First of all, I would like to indicate my deepest regards and thanks to my supervisor Assoc. Prof. Dr. Volkan SEYRANTEPE for his encouragement, understanding, guidance, and excellent support during my graduate studies. I would like to thank to Assist. Prof. Dr. Alper Arslanoğlu to let me use his laboratory during my thesis studies. And I would also like to thank to Assist. Prof. Dr. Ayten Nalbant, Assist. Prof. Dr. Bünyamin Akgül, Assoc. Prof. Dr. Sami Doğanlar, Assoc. Prof. Dr. Ahmet Koç, Prof. Dr. Serdar Özçelik and Assoc. Prof. Dr. Mehtap Demirağ to let me use their laboratory during my studies. Also I would like to express my grateful thanks to my committee members Assoc. -
Neuraminidase Inhibitor Zanamivir Ameliorates Collagen-Induced Arthritis
International Journal of Molecular Sciences Article Neuraminidase Inhibitor Zanamivir Ameliorates Collagen-Induced Arthritis Bettina Sehnert 1,*, Juliane Mietz 1, Rita Rzepka 1, Stefanie Buchholz 1, Andrea Maul-Pavicic 1, Sandra Schaffer 1, Falk Nimmerjahn 2 and Reinhard E. Voll 1,* 1 Department of Rheumatology and Clinical Immunology, Medical Center–University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; [email protected] (J.M.); [email protected] (R.R.); [email protected] (S.B.); [email protected] (A.M.-P.); [email protected] (S.S.) 2 Department of Biology, Institute of Genetics, Friedrich-Alexander University Erlangen-Nürnberg (FAU), 91058 Erlangen, Germany; [email protected] * Correspondence: [email protected] (B.S.); [email protected] (R.E.V.); Tel.: +49-761-270-71021 (B.S.); +49-761-270-34490 (R.E.V.) Abstract: Altered sialylation patterns play a role in chronic autoimmune diseases such as rheumatoid arthritis (RA). Recent studies have shown the pro-inflammatory activities of immunoglobulins (Igs) with desialylated sugar moieties. The role of neuraminidases (NEUs), enzymes which are responsible for the cleavage of terminal sialic acids (SA) from sialoglycoconjugates, is not fully understood in RA. We investigated the impact of zanamivir, an inhibitor of the influenza virus neuraminidase, and mammalian NEU2/3 on clinical outcomes in experimental arthritides studies. The severity of arthritis was monitored and IgG titers were measured by ELISA. (2,6)-linked SA was determined on IgG by ELISA and on cell surfaces by flow cytometry. Zanamivir at a dose of 100 mg/kg (zana- Citation: Sehnert, B.; Mietz, J.; 100) significantly ameliorated collagen-induced arthritis (CIA), whereas zana-100 was ineffective Rzepka, R.; Buchholz, S.; in serum transfer-induced arthritis. -
Cell Surface Sialylated N-Glycan Alterations During Development
REVIEW ARTICLE Eur J Biol 2017; 76(2): 79-88 Cell Surface Sialylated N-Glycan Alterations during Development Sabire Karacali Ege Universiy, Faculty of Science, Department of Biology, Izmir, Turkey Please cite this article as: Karacali S. Cell Surface Sialylated N-Glycan Alterations during Development. Eur J Biol 2017; 76(2): 79-88 ABSTRACT This brief survey focuses on the comparison of sialylated N-glycans of embryonic stem cells (ESCs), induced pluripotent stem cells (iPSCs), mesenchymal stem cells (MSCs) and of differentiated cells. In addition, the impact of sialic acid (Sia) deficiency on cell surfaces during development is summarized. The most common Sia is N-acetylneuraminic acid (Neu5Ac). The branched structures of complex- and hybrid- type N-glycans are the carrier for Sia. Transmembrane adhesive proteins, voltage-gated ion channels and many ligand-activated receptors are some examples of heavily sialylated N-glycan bearing membrane proteins. Their oligosaccharide extensions provide an important contribution to glycocalyx glycans. ESCs and iPSCs are characterized with high mannose-type and biantennary complex-type core structures. Two branches terminate with α2,6- linked Sia. MSCs contain high mannose, hybrid- and complex- type N-glycans. Linear poly-N-acetyllactosamine (poly-Galβ1-4GlcNAc, poly-LacNAc) chains are the characteristic structures. Both α2,3- and α2,6- linked Sias are seen in a species-specific manner in MSCs. α2,6- linked Sia is probably a marker associated with the multipotency of human MSCs. Differentiated healthy cells contain the most abundant 2-branched complex structures. The bisecting branch on the core structure appears as a differentiation marker. poly-LacNAc chains are terminated with α2,3- and α2,6- linked Sia, with the former being higher. -
Characterization of Transgenic Mouse Model of Humanized Sialidase
TRANSGENIC MOUSE MODEL OF HUMANIZED SIALIDASE CHRACTERIZATION OF TRANSGENIC MOUSE MODEL OF HUMANIZED SIALIDSAE By Ghada A. Tarbah, B.Sc. A Thesis submitted to the School of Graduate Studies in Partial fulfillment of the Requirements for the Degree Master of Science McMaster University © Copyright by Ghada Tarbah, June 2009 MASTER OF SCIENCE (2008) McMaster University (Biology) Hamilton, Ontario M.Sc. thesis - G. Tarbah McMaster - Biology TITLE: Characterization of Transgenic Mouse Model of Humanized Sialidase AUTHOR: Ghada A. Tarbah, B.Sc. SUPERVISOR: Suleiman Igdoura, PhD, Associate Professor, McMaster University Number of Pages: XI, 59 ii M.Sc. thesis - G. Tarbah McMaster - Biology ABSTRACT Ganglosidoses are a group of fatal neurological disorders which primarily affect children. Pathologically, these disorders need more characterization. The recent development of mouse models of these diseases makes it possible to identify progressive pathological changes within the CNS at the molecular level. Tay Sachs disease is a lysosomal storage disorder characterized by accumulation of GM2 Ganglioside. Targeted Knockout of ~-hexosaminidase A (hex a) was generated as a mouse model of Tay Sachs disease; however, the mouse showed little clinical phenotype. The molecular mechanism which allows the hexa-/- mouse to escape the disease involves a metabolic bypass facilitated by lysosomal Sialidase (neu l). In this study we hypothesize that the reason humans have the infantile Tay-Sachs whereas mice do not, is a difference in specificity between human and mouse sialidases. This specificity difference makes the human sialidase unable to hydrolyze GM2 to GA2, which leads to the accumulation of GM2 in neurons and consequently a resulting Tay-Sachs phenotype. -
The 6C RNA of Corynebacterium Glutamicum
C. glutamicum The 6C RNA of The 6C RNA Jennifer Pahlke Jennifer Gesundheit Health The 6C RNA of Corynebacterium glutamicum Jennifer Pahlke Gesundheit / Health Band/ Volume 76 ISBN 978-3-95806-003-6 76 Helmholtz Association Member of the Schriften des Forschungszentrums Jülich Reihe Gesundheit / Health Band / Volume 76 Forschungszentrum Jülich GmbH Institute of Bio- and Geosciences (IBG) Biotechnology (IBG-1) The 6C RNA of Corynebacterium glutamicum Jennifer Pahlke Schriften des Forschungszentrums Jülich Reihe Gesundheit / Health Band / Volume 76 ISSN 1866-1785 ISBN 978-3-95806-003-6 Bibliographic information published by the Deutsche Nationalbibliothek. The Deutsche Nationalbibliothek lists this publication in the Deutsche Nationalbibliografie; detailed bibliographic data are available in the Internet at http://dnb.d-nb.de. Publisher and Forschungszentrum Jülich GmbH Distributor: Zentralbibliothek 52425 Jülich Tel: +49 2461 61-5368 Fax: +49 2461 61-6103 Email: [email protected] www.fz-juelich.de/zb Cover Design: Grafische Medien, Forschungszentrum Jülich GmbH Printer: Grafische Medien, Forschungszentrum Jülich GmbH Copyright: Forschungszentrum Jülich 2014 Schriften des Forschungszentrums Jülich Reihe Gesundheit / Health, Band / Volume 76 D 61 (Diss. Düsseldorf, Univ., 2014) ISSN 1866-1785 ISBN 978-3-95806-003-6 The complete volume is freely available on the Internet on the Jülicher Open Access Server (JuSER) at www.fz-juelich.de/zb/openaccess Neither this book nor any part of it may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, microfilming, and recording, or by any information storage and retrieval system, without permission in writing from the publisher. Content Summary .............................................................................................................................. 1 Zusammenfassung ............................................................................................................. -
An Intrinsic Mechanism of Secreted Protein Aging and Turnover
An intrinsic mechanism of secreted protein aging and turnover Won Ho Yanga,b, Peter V. Aziza,b, Douglas M. Heithoffc, Michael J. Mahanc, Jeffrey W. Smithb, and Jamey D. Martha,b,c,1 aCenter for Nanomedicine, University of California, Santa Barbara, CA 93106; bSanford–Burnham–Prebys Medical Discovery Institute, La Jolla, CA 92037; and cDepartment of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, CA 93106 Edited by Kevin P. Campbell, University of Iowa Carver College of Medicine, Iowa City, IA, and approved September 23, 2015 (received for review August 4, 2015) The composition and functions of the secreted proteome are con- activity levels that change in disease (9). We investigated whether trolled by the life spans of different proteins. However, unlike the normal activities of circulating glycosidases may hydrolyze intracellular protein fate, intrinsic factors determining secreted pro- N-glycan linkages attached to secreted proteins, thereby generat- tein aging and turnover have not been identified and characterized. ing multivalent ligands of endocytic lectin receptors in contribut- Almost all secreted proteins are posttranslationally modified with the ing to a mechanism of secreted protein aging and turnover. covalent attachment of N-glycans. We have discovered an intrinsic Results mechanism of secreted protein aging and turnover linked to the stepwise elimination of saccharides attached to the termini of N-Glycan Remodeling in the Aging of Secreted Proteins. Most se- N-glycans. Endogenous glycosidases, including neuraminidase 1 (Neu1), creted proteins are modified with N-glycans before entry into cir- neuraminidase 3 (Neu3), beta-galactosidase 1 (Glb1), and hexosamini- culatory systems. We isolated secreted proteins among platelet-poor dase B (HexB), possess hydrolytic activities that temporally remodel plasma following i.v.