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CYP2A6) by P53
Transcriptional Regulation of Human Stress Responsive Cytochrome P450 2A6 (CYP2A6) by p53 Hao Hu M.Biotech. (Biotechnology) 2012 The University of Queensland B.B.A. 2009 University of Electronic Science and Technology of China B.Sc. (Pharmacy) 2009 University of Electronic Science and Technology of China A thesis submitted for the degree of Doctor of Philosophy at The University of Queensland in 2016 School of Medicine ABSTRACT Human cytochrome P450 (CYP) 2A6 is highly expressed in the liver and the encoding gene is regulated by various stress activated transcription factors, such as the nuclear factor (erythroid-derived 2)-like 2 (Nrf-2). Unlike the other xenobiotic metabolising CYP enzymes (XMEs), CYP2A6 only plays a minor role in xenobiotic metabolism. The CYP2A6 is highly induced by multiple forms of cellular stress conditions, where XMEs expression is normally inhibited. Recent findings suggest that the CYP2A6 plays an important role in regulating BR homeostasis. A computer based sequence analysis on the 3 kb proximate CYP2A6 promoter revealed several putative binding sites for p53, a protein that mediates regulation of antioxidant and apoptosis pathways. In this study, the role of p53 in CYP2A6 gene regulation is demonstrated. The site closest to transcription start site (TSS) is highly homologous with the p53 consensus sequence. The p53 responsiveness of this site was confirmed by transfections with various stepwise deleted of CYP2A6-5’-Luc constructs containing the putative p53RE. Deletion of the putative p53RE resulted in a total abolishment of p53 responsiveness of CYP2A6 promoter. Specific binding of p53 to the putative p53RE was detected by electrophoresis mobility shift assay. -
Characterisation of Bilirubin Metabolic Pathway in Hepatic Mitochondria Siti Nur Fadzilah Muhsain M.Sc
Characterisation of Bilirubin Metabolic Pathway in Hepatic Mitochondria Siti Nur Fadzilah Muhsain M.Sc. (Medical Research) 2005 Universiti Sains Malaysia Postgrad. Dip. (Toxicology) 2003 University of Surrey B.Sc.(Biomed. Sc.) 2000 Universiti Putra Malaysia A thesis submitted for the degree of Doctor of Philosophy at The University of Queensland in 2014 School of Medicine ABSTRACT Bilirubin (BR), a toxic waste product of degraded haem, is a potent antioxidant at physiological concentrations. To achieve the maximum benefit of BR, its intracellular level needs to be carefully regulated. A system comprising of two enzymes, haem oxygenase-1 (HMOX1) and cytochrome P450 2A5 (CYP2A5) exists in the endoplasmic reticulum (ER), responsible for regulating BR homeostasis. This system is induced in response to oxidative stress. In this thesis, oxidative stress caused accumulation of these enzymes in mitochondria — major producers and targets of reactive oxygen species (ROS) — is demonstrated. To understand the significance of this intracellular targeting, properties of microsomal and mitochondrial BR metabolising enzymes were compared and the capacity of mitochondrial CYP2A5 to oxidise BR in response to oxidative stress is reported. Microsomes and mitochondrial fractions were isolated from liver homogenates of DBA/2J mice, administered with sub-toxic dose of pyrazole, an oxidant stressor. The purity of extracted organelles was determined by analysing the expressions and activities of their respective marker enzymes. HMOX1 and CYP2A5 were significantly increased in microsomes and even more so in mitochondria in response to pyrazole-induced oxidative stress. By contrast, the treatment did not increase either microsomes or mitochondrial Uridine-diphosphate-glucuronosyltransferase 1A1 (UGT1A1), the sole enzyme that catalyses BR elimination through glucuronidation. -
Genes in Eyecare Geneseyedoc 3 W.M
Genes in Eyecare geneseyedoc 3 W.M. Lyle and T.D. Williams 15 Mar 04 This information has been gathered from several sources; however, the principal source is V. A. McKusick’s Mendelian Inheritance in Man on CD-ROM. Baltimore, Johns Hopkins University Press, 1998. Other sources include McKusick’s, Mendelian Inheritance in Man. Catalogs of Human Genes and Genetic Disorders. Baltimore. Johns Hopkins University Press 1998 (12th edition). http://www.ncbi.nlm.nih.gov/Omim See also S.P.Daiger, L.S. Sullivan, and B.J.F. Rossiter Ret Net http://www.sph.uth.tmc.edu/Retnet disease.htm/. Also E.I. Traboulsi’s, Genetic Diseases of the Eye, New York, Oxford University Press, 1998. And Genetics in Primary Eyecare and Clinical Medicine by M.R. Seashore and R.S.Wappner, Appleton and Lange 1996. M. Ridley’s book Genome published in 2000 by Perennial provides additional information. Ridley estimates that we have 60,000 to 80,000 genes. See also R.M. Henig’s book The Monk in the Garden: The Lost and Found Genius of Gregor Mendel, published by Houghton Mifflin in 2001 which tells about the Father of Genetics. The 3rd edition of F. H. Roy’s book Ocular Syndromes and Systemic Diseases published by Lippincott Williams & Wilkins in 2002 facilitates differential diagnosis. Additional information is provided in D. Pavan-Langston’s Manual of Ocular Diagnosis and Therapy (5th edition) published by Lippincott Williams & Wilkins in 2002. M.A. Foote wrote Basic Human Genetics for Medical Writers in the AMWA Journal 2002;17:7-17. A compilation such as this might suggest that one gene = one disease. -
Dissertation
Dissertation Submitted to the Combined Faculties for the Natural Sciences and for Mathematics of the Ruperto-Carola University of Heidelberg, Germany for the Degree of Doctor of Natural Sciences Presented by Ann-Cathrin Hofer (M.Sc.) Born in Heidelberg, Germany Oral Examination: 12th of September 2016 Regulatory T cells protect the neonatal liver and secure the hepatic circadian rhythm Referees 1st Referee: Prof. Dr. Peter Angel 2nd Referee: Dr. Markus Feuerer This dissertation was performed and written during the period from November 2012 to May 2016 in the German Cancer Research Center (DKFZ) under the supervision of Prof. Dr. Peter Angel and direct supervision of Dr. Markus Feuerer. The dissertation was submitted to the Combined Faculties for the Natural Sciences and for Mathematics of the Ruperto-Carola University of Heidelberg, Germany in June 2016. German Cancer Research Center (DKFZ) Immune Tolerance (D100) Im Neuenheimer Feld 280 69120 Heidelberg, Germany I II Confirmation Hereby, I confirm that I have written this thesis independently, using only the results of my investigation unless otherwise stated. Furthermore, I declare that I have not submitted this thesis for a degree to any other academic or similar institution. Parts of this dissertation have been submitted for publishing: Regulatory T cells protect the liver early in life and safeguard the hepatic circadian rhythm Ann-Cathrin Hofer, Thomas Hielscher, David M. Richards, Michael Delacher, Ulrike Träger, Sophia Föhr, Artyom Vlasov, Marvin Wäsch, Marieke Esser, Annette Kopp-Schneider, Achim Breiling, Frank Lyko, Ursula Klingmüller, Peter Angel, Jakub Abramson, Jeroen Krijgsveld & Markus Feuerer Parts of the experiments in this dissertation were performed in collaboration with other research groups as follows: CG methylation analysis with the 454 pyrosequencing technology: Division of Epigenetics, DKFZ, Heidelberg Dr. -
Neonatal Hyperbilirubinemia
Clinical Chemistry Trainee Council Pearls of Laboratory Medicine www.traineecouncil.org TITLE: Neonatal Hyperbilirubinemia PRESENTER: Linnea M. Baudhuin, Ph.D., DABMG Slide 1: Title slide Slide 2: Bilirubin is an orange‐yellow pigment derived from the degradation of the heme moiety of hemoproteins, particularly the hemoglobin of mature circulating erythrocytes. Hemo oxygenase is the enzyme initially responsible for the degradation of hemoglobin, producing biliverdin and carbon monoxide. Biliverdin reductase reduces the green‐pigmented biliverdin to bilirubin. Bilirubin production primarily occurs in the liver, but also can occur in the spleen and bone marrow, and as it is produced in the unconjugated form, bilirubin is highly insoluble. Bilirubin is conjugated in the liver, which allows excretion in the bile and urine. Bilirubin is mainly conjugated to glucuronic acid by uridine diphosphate glucuronosyl transferase 1A1, or UGT1A1. Slide 3: Bilirubin is photosensitive because light causes configurational and structural changes to unconjugated bilirubin. The structure of bilirubin, as established by x‐ray crystallography, is a ridge‐tiled configuration stabilized by six intramolecular hydrogen bonds. These six intramolecular hydrogen bonds stabilize the Z‐Z structure of unconjugated bilirubin, rendering it insoluble. Rotation and/or breakage of the bonds on carbon atoms 5 and 15 lead to more open E‐Z‐ and Z‐E‐bilirubin structures, which are more water soluble. The sensitivity of bilirubin to light is the basis for phototherapy in individuals with unconjugated hyperbilirubinemia. Clinical measurement of bilirubin can also be affected due to this light sensitivity. Slide 4: Four fractions of bilirubin can be revealed upon open‐column chromatographic separation that does not involve deproteinization. -
HHC Disorder Setting
DISORDER/SETTING Question 1: What is the specific clinical disorder to be studied? Question 2: What are the clinical findings defining this disorder? Question 3: What is the clinical setting in which the test is to be performed? Question 4: What DNA test(s) are associated with this disorder? Question 5: Are preliminary screening questions employed? Question 6: Is it a stand-alone test or is it one of a series of tests? Question 7: If it is part of a series of screening tests, are all tests performed in all instances (parallel) or are only some tests performed on the basis of other results (series)? ACCE Review of HHC/Adult General Population Disorder/Setting 1-1 Version 2003.6 DISORDER/SETTING Question 1: What is the specific clinical disorder to be studied? The specific clinical disorder is primary iron overload of adult onset sufficient to cause significant morbidity and mortality. • Iron overload refers to excess deposition of iron in parenchymal cells in the liver, pancreas and heart, and/or increased total body mobilizable iron. • Primary refers to a genetically determined abnormality of iron absorption, metabolism, or both. • Morbidity refers to organ damage that results in physical disability over and above that seen in the absence of iron overload. A single inherited disorder, HFE-related hereditary hemochromatosis (HHC) accounts for the vast majority of cases of primary iron overload in Caucasian adults in the United States. The HFE gene is linked to HLA-A on the short arm of chromosome 6. HFE-related HHC is a recessive disorder. A small proportion of primary iron overload cases is explained by inherited disorders other than HFE-related HHC. -
Revisiting Hemochromatosis: Genetic Vs
731 Review Article on Unresolved Basis Issues in Hepatology Page 1 of 16 Revisiting hemochromatosis: genetic vs. phenotypic manifestations Gregory J. Anderson1^, Edouard Bardou-Jacquet2 1Iron Metabolism Laboratory, QIMR Berghofer Medical Research Institute and School of Chemistry and Molecular Bioscience, University of Queensland, Brisbane, Queensland, Australia; 2Liver Disease Department, University of Rennes and French Reference Center for Hemochromatosis and Iron Metabolism Disease, Rennes, France Contributions: (I) Conception and design: Both authors; (II) Administrative support: None; (III) Provision of study materials or patients: None; (IV) Collection and assembly of data: None; (V) Data analysis and interpretation: None; (VI) Manuscript writing: Both authors; (VII) Final approval of manuscript: Both authors. Correspondence to: Gregory J. Anderson. Iron Metabolism Laboratory, QIMR Berghofer Medical Research Institute, 300 Herston Road, Brisbane, Queensland 4006, Australia. Email: [email protected]. Abstract: Iron overload disorders represent an important class of human diseases. Of the primary iron overload conditions, by far the most common and best studied is HFE-related hemochromatosis, which results from homozygosity for a mutation leading to the C282Y substitution in the HFE protein. This disease is characterized by reduced expression of the iron-regulatory hormone hepcidin, leading to increased dietary iron absorption and iron deposition in multiple tissues including the liver, pancreas, joints, heart and pituitary. The phenotype of HFE-related hemochromatosis is quite variable, with some individuals showing little or no evidence of increased body iron, yet others showing severe iron loading, tissue damage and clinical sequelae. The majority of genetically predisposed individuals show at least some evidence of iron loading (increased transferrin saturation and serum ferritin), but a minority show clinical symptoms and severe consequences are rare. -
Solarbio Catalogue with PRICES
CAS Name Grade Purity Biochemical Reagent Biochemical Reagent 75621-03-3 C8390-1 3-((3-Cholamidopropyl)dimethylammonium)-1-propanesulfonateCHAPS Ultra Pure Grade 1g 75621-03-3 C8390-5 3-((3-Cholamidopropyl)dimethylammonium)-1-propanesulfonateCHAPS 5g 57-09-0 C8440-25 Cetyl-trimethyl Ammonium Bromide CTAB High Pure Grade ≥99.0% 25g 57-09-0 C8440-100 Cetyl-trimethyl Ammonium Bromide CTAB High Pure Grade ≥99.0% 100g 57-09-0 C8440-500 Cetyl-trimethyl Ammonium Bromide CTAB High Pure Grade ≥99.0% 500g E1170-100 0.5M EDTA (PH8.0) 100ml E1170-500 0.5M EDTA (PH8.0) 500ml 6381-92-6 E8030-100 EDTA disodium salt dihydrate EDTA Na2 Biotechnology Grade ≥99.0% 100g 6381-92-6 E8030-500 EDTA disodium salt dihydrate EDTA Na2 Biotechnology Grade ≥99.0% 500g 6381-92-6 E8030-1000 EDTA disodium salt dihydrate EDTA Na2 Biotechnology Grade ≥99.0% 1kg 6381-92-6 E8030-5000 EDTA disodium salt dihydrate EDTA Na2 Biotechnology Grade ≥99.0% 5kg 60-00-4 E8040-100 Ethylenediaminetetraacetic acid EDTA Ultra Pure Grade ≥99.5% 100g 60-00-4 E8040-500 Ethylenediaminetetraacetic acid EDTA Ultra Pure Grade ≥99.5% 500g 60-00-4 E8040-1000 Ethylenediaminetetraacetic acid EDTA Ultra Pure Grade ≥99.5% 1kg 67-42-5 E8050-5 Ethylene glycol-bis(2-aminoethylether)-N,N,NEGTA′,N′-tetraacetic acid Ultra Pure Grade ≥97.0% 5g 67-42-5 E8050-10 Ethylene glycol-bis(2-aminoethylether)-N,N,NEGTA′,N′-tetraacetic acid Ultra Pure Grade ≥97.0% 10g 50-01-1 G8070-100 Guanidine Hydrochloride Guanidine HCl ≥98.0%(AT) 100g 50-01-1 G8070-500 Guanidine Hydrochloride Guanidine HCl ≥98.0%(AT) 500g 56-81-5 -
1 Molecular Physiology and Pathophysiology of Bilirubin Handling by the Blood, Liver
1 1 MOLECULAR PHYSIOLOGY AND PATHOPHYSIOLOGY OF BILIRUBIN HANDLING BY THE BLOOD, LIVER, 2 INTESTINE, AND BRAIN IN THE NEWBORN 3 THOR W.R. HANSEN1, RONALD J. WONG2, DAVID K. STEVENSON2 4 1Division of Paediatric and Adolescent Medicine, Institute of Clinical Medicine, Faculty of Medicine, 5 University of Oslo, Norway 6 2Department of Pediatrics, Stanford University School of Medicine, Stanford CA, USA 7 __________________________________________________________________________________ 8 2 9 I. Introduction 10 II. Bilirubin in the Body 11 A. Bilirubin Chemistry 12 1. Bilirubin structure 13 2. Bilirubin solubility 14 3. Bilirubin isomers 15 4. Heme degradation 16 5. Biliverdin and biliverdin reductase (BVR) 17 B. Bilirubin as an Antioxidant 18 C. Bilirubin as a Toxin 19 1. Bilirubin effects on enzyme activity 20 2. Toxicity of bilirubin conjugates and isomers 21 D. Other Functions/Roles 22 1. Drug displacement by bilirubin 23 2. Bilirubin interactions with the immune system and 24 inflammatory/infectious mechanisms 25 III. The Production of Bilirubin in the Body 26 A. Heme Catabolism and Its Regulation 27 1. Genetic variants in bilirubin production 28 B. The Effect of Hemolysis 29 1. Disorders associated with increased bilirubin production 30 IV. Bilirubin Binding and Transport in Blood 31 V. Bilirubin in the Liver 32 A. Hepatocellular Uptake and Intracellular Processing 33 B. Bilirubin Conjugation 34 1. Genetic variants in bilirubin conjugation 3 35 a. Crigler-Najjar syndrome type I 36 b. Crigler-Najjar syndrome type II 37 c. Gilbert syndrome 38 2. Genetic variants in transporter proteins 39 C. Bilirubin Excretion 40 VI. Bilirubin in the Intestines 41 A. -
Junbai Li Editor Supramolecular Chemistry of Biomimetic Systems Supramolecular Chemistry of Biomimetic Systems Junbai Li Editor
Junbai Li Editor Supramolecular Chemistry of Biomimetic Systems Supramolecular Chemistry of Biomimetic Systems Junbai Li Editor Supramolecular Chemistry of Biomimetic Systems 123 Editor Junbai Li Institute of Chemistry, Chinese Academy of Sciences Beijing China ISBN 978-981-10-6058-8 ISBN 978-981-10-6059-5 (eBook) DOI 10.1007/978-981-10-6059-5 Library of Congress Control Number: 2017949116 © Springer Nature Singapore Pte Ltd. 2017 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Printed on acid-free paper This Springer imprint is published by Springer Nature The registered company is Springer Nature Singapore Pte Ltd. -
OR09-1 Neonatal Exendin-4 Normalizes Epigenetic Modifications at the Proximal Promoter of PGC1-Α in IUGR Rat Liver
ENDO 2010 Abstract OR09-1 Neonatal Exendin-4 Normalizes Epigenetic Modifications at the Proximal Promoter of PGC1-α in IUGR Rat Liver. SE Pinney MD1, Y Han MD1 and RA Simmons MD1. 1Children's Hosp Philadelphia, Univ Pennsylvania Sch of Med Philadelphia, PA. Intrauterine growth retardation (IUGR) has been linked to the development of type 2 diabetes in adults. IUGR impairs hepatic mitochondrial function in prediabetic IUGR animals. PGC1-a is a transcriptional coactivator and metabolic regulator that promotes mitochondrial biogenesis and is critical for normal mitochondrial function. Expression is decreased in IUGR liver. Exendin-4 (Ex4), a long-acting agonist of the glucose dependent insulinotropic hormone (GLP-1), improves mitochondria function, normalizes hepatic insulin resistance, and prevents diabetes in the IUGR rat. The objectives were to determine if Ex4 normalizes PGC1- α expression; and whether changes in expression are linked to epigenetic modifications at the PGC1- α promoter. IUGR newborn pups were treated with a 6-day course (day 1-6) of Ex4 and liver was harvested for analyses at 8 weeks of age. Gene expression was measured by quantitative (q)-PCR. Histone modifications were evaluated by chromatin immunoprecipitation assays and q-PCR. PGC1- α gene expression was decreased in adult IUGR animals compared to control by 80% (p=0.017) and Ex4 treatment normalized PGC1-expression to levels equivalent to controls (p=0.36). Similarly, mitochondrial DNA and protein content were significantly reduced in IUGR liver (62±4.2% of controls, p=0.012) and neonatal Ex4 treatment normalized mitochondria content (102±4.6% of controls, p=0.45). -
Inherited Disorders of Bilirubin Clearance N
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Hofstra Northwell Academic Works (Hofstra Northwell School of Medicine) Donald and Barbara Zucker School of Medicine Journal Articles Academic Works 2015 Inherited disorders of bilirubin clearance N. Memon B. I. Weinberger Zucker School of Medicine at Hofstra/Northwell T. Hegyi L. M. Aleksunes Follow this and additional works at: https://academicworks.medicine.hofstra.edu/articles Part of the Pediatrics Commons Recommended Citation Memon N, Weinberger B, Hegyi T, Aleksunes L. Inherited disorders of bilirubin clearance. 2015 Jan 01; 79(3):Article 2776 [ p.]. Available from: https://academicworks.medicine.hofstra.edu/articles/2776. Free full text article. This Article is brought to you for free and open access by Donald and Barbara Zucker School of Medicine Academic Works. It has been accepted for inclusion in Journal Articles by an authorized administrator of Donald and Barbara Zucker School of Medicine Academic Works. For more information, please contact [email protected]. HHS Public Access Author manuscript Author ManuscriptAuthor Manuscript Author Pediatr Manuscript Author Res. Author manuscript; Manuscript Author available in PMC 2016 April 05. Published in final edited form as: Pediatr Res. 2016 March ; 79(3): 378–386. doi:10.1038/pr.2015.247. Inherited Disorders of Bilirubin Clearance Naureen Memon1,*, Barry I Weinberger2, Thomas Hegyi1, and Lauren M Aleksunes3 1Department of Pediatrics, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA 2Department of Pediatrics, Cohen Children’s Medical Center of New York, New Hyde Park, NY, USA 3Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ, USA Abstract Inherited disorders of hyperbilirubinemia may be caused by increased bilirubin production or decreased bilirubin clearance.