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Strategies to Increase ß-Cell Mass Expansion
This electronic thesis or dissertation has been downloaded from the King’s Research Portal at https://kclpure.kcl.ac.uk/portal/ Strategies to increase -cell mass expansion Drynda, Robert Lech Awarding institution: King's College London The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without proper acknowledgement. END USER LICENCE AGREEMENT Unless another licence is stated on the immediately following page this work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International licence. https://creativecommons.org/licenses/by-nc-nd/4.0/ You are free to copy, distribute and transmit the work Under the following conditions: Attribution: You must attribute the work in the manner specified by the author (but not in any way that suggests that they endorse you or your use of the work). Non Commercial: You may not use this work for commercial purposes. No Derivative Works - You may not alter, transform, or build upon this work. Any of these conditions can be waived if you receive permission from the author. Your fair dealings and other rights are in no way affected by the above. Take down policy If you believe that this document breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 02. Oct. 2021 Strategies to increase β-cell mass expansion A thesis submitted by Robert Drynda For the degree of Doctor of Philosophy from King’s College London Diabetes Research Group Division of Diabetes & Nutritional Sciences Faculty of Life Sciences & Medicine King’s College London 2017 Table of contents Table of contents ................................................................................................. -
The Vertebrate Retina Contains Two Types of Photoreceptors: Rods That
JOURNAL OF NEUROCHEMISTRY | 2009 | 108 | 91–101 doi: 10.1111/j.1471-4159.2008.05739.x *Department of Anatomy, School of Medicine, Tokyo Women’s Medical University, Tokyo, Japan Genetics and Development Division, Toronto Western Research Institute, University Health Network, Department of Ophthalmology and Visual Sciences and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada àUniversity of Ottawa Eye Institute and Ottawa Health Research Institute, Ottawa, Ontario, Canada Abstract The retinas of staggerer mice, carrying a null mutation of Color vision is supported by retinal cone photoreceptors that, RORa, show significant down-regulation of Opn1sw, in most mammals, express two photopigments sensitive to Opn1mw, and Arr3. RORa acts in synergy with cone-rod short (S-opsin) or middle (M-opsin) wavelengths. Expression homeobox transcription factor (Crx), to activate the Opn1sw of the Opn1sw and Opn1mw genes, encoding S-opsin and promoter in vitro. Chromatin immunoprecipitation assays re- M-opsin, respectively, is under the control of nuclear veal that RORa directly binds to the Opn1sw promoter, receptors, including thyroid hormone receptor b2 (TRb2), Opn1mw locus control region, and the Arr3 promoter in vivo. retinoid X receptor c (RXRc), and RORb, a member of the Our data suggest that RORa plays a crucial role in cone retinoic acid receptor-related orphan receptor (ROR) family. development by directly regulating multiple cone genes. We now demonstrate that RORa, another member of the ROR Keywords: arrestin, cone photoreceptor, opsin, retina, family, regulates Opn1sw, Opn1mw, as well as Arr3 (cone RORa, staggerer. arrestin) in the mouse retina. RORa expression is detected in J. -
Transcriptomic Profiling of Pancreatic Alpha, Beta and Delta Cell Populations Identifies Delta Cells As a Principal Target for Ghrelin in Mouse Islets
Diabetologia (2016) 59:2156–2165 DOI 10.1007/s00125-016-4033-1 ARTICLE Transcriptomic profiling of pancreatic alpha, beta and delta cell populations identifies delta cells as a principal target for ghrelin in mouse islets Alice E. Adriaenssens1 & Berit Svendsen2,3 & Brian Y. H. Lam1 & Giles S. H. Yeo1 & Jens J. Holst2,3 & Frank Reimann1 & Fiona M. Gribble 1 Received: 15 March 2016 /Accepted: 1 June 2016 /Published online: 7 July 2016 # The Author(s) 2016. This article is published with open access at Springerlink.com Abstract using islets with delta cell restricted expression of the calcium Aims/hypothesis Intra-islet and gut–islet crosstalk are critical reporter GCaMP3, and in perfused mouse pancreases. in orchestrating basal and postprandial metabolism. The aim Results A database was constructed of all genes expressed in of this study was to identify regulatory proteins and receptors alpha, beta and delta cells. The gene encoding the ghrelin underlying somatostatin secretion though the use of receptor, Ghsr, was highlighted as being highly expressed transcriptomic comparison of purified murine alpha, beta and enriched in delta cells. Activation of the ghrelin receptor and delta cells. raised cytosolic calcium levels in primary pancreatic delta Methods Sst-Cre mice crossed with fluorescent reporters were cells and enhanced somatostatin secretion in perfused used to identify delta cells, while Glu-Venus (with Venus re- pancreases, correlating with a decrease in insulin and gluca- ported under the control of the Glu [also known as Gcg]pro- gon release. The inhibition of insulin secretion by ghrelin was moter) mice were used to identify alpha and beta cells. -
From Inverse Agonism to 'Paradoxical Pharmacology' Richard A
International Congress Series 1249 (2003) 27-37 From inverse agonism to 'Paradoxical Pharmacology' Richard A. Bond*, Kenda L.J. Evans, Zsirzsanna Callaerts-Vegh Department of Pharmacological and Pharmaceutical Sciences, University of Houston, 521 Science and Research Bldg 2, 4800 Caltioun, Houston, TX 77204-5037, USA Received 16 April 2003; accepted 16 April 2003 Abstract The constitutive or spontaneous activity of G protein-coupled receptors (GPCRs) and compounds acting as inverse agonists is a recent but well-established phenomenon. Dozens of receptor subtypes for numerous neurotransmitters and hormones have been shown to posses this property. However, do to the apparently low percentage of receptors in the spontaneously active state, the physiologic relevance of these findings remains questionable. The possibility that the reciprocal nature of the effects of agonists and inverse agonists may extend to cellular signaling is discussed, and that this may account for the beneficial effects of certain p-adrenoceptor inverse agonists in the treatment of heart failure. © 2003 Elsevier Science B.V. All rights reserved. Keywords. Inverse agonism; GPCR; Paradoxical pharmacology 1. Brief history of inverse agonism at G protein-coupled receptors For approximately three-quarters of a century, ligands that interacted with G protein- coupled receptors (GPCRs) were classified either as agonists or antagonists. Receptors were thought to exist in a single quiescent state that could only induce cellular signaling upon agonist binding to the receptor to produce an activated state of the receptor. In this model, antagonists had no cellular signaling ability on their own, but did bind to the receptor and prevented agonists from being able to bind and activate the receptor. -
Supplemental Table 1 Enriched Genes in Cortical Astrocytes from Aged
Supplemental Table 1 Enriched genes in cortical astrocytes from aged and young-adult mice * Genes were present in the astrocyte module from the WGCNA analysis, and contains astrocyte enriched genes compared to microglia and oligodendrocytes # = Fold change of aged astrocyte expression over the average expression of all analyzed samples (microglia, astrocytes: young, old, with and without myelin contamination) $ ; aged = genes only present in the aged astrocyte top 1000 list (used to compare with lists from Cahoy, Lovatt, Doyle; see Fig. 4B), all = genes present in all astrocyte top 1000 lists Gene Symbol* Aged astr. (log2) Young astr.(log2) FC (aged/ aver.)# Location Ptprz1 15.37 15.02 18.76 Plasma Membrane Slc7a10 14.49 14.44 18.28 Plasma Membrane Gjb6 15.13 14.42 18.18 Plasma Membrane Dclk1 14.63 14.28 17.18 unknown Hes5 15.69 15.55 16.94 Nucleus Fgfr3 15.27 14.46 16.54 Plasma Membrane Entpd2 13.85 13.56 15.92 Cytoplasm Grin2c 14.93 14.87 15.75 Plasma Membrane Slc1a2 15.51 15.39 15.58 Plasma Membrane Fjx1 14.36 13.98 14.52 Extracellular Space Slc6a1 14.20 14.16 14.47 Plasma Membrane Kcnk1 12.93 13.49 14.43 Plasma Membrane Ppap2b 16.16 16.10 14.37 Plasma Membrane Fam20a 14.48 14.72 14.00 Extracellular Space Dbx2 13.68 13.32 13.99 Nucleus Itih3 13.93 13.93 13.94 Extracellular Space Htra1 17.12 16.91 13.92 Extracellular Space Atp1a2 14.59 14.48 13.73 Plasma Membrane Scg3 15.71 15.72 13.68 Extracellular Space F3 15.59 15.08 13.51 Plasma Membrane Mmd2 14.22 14.60 13.50 unknown Nrcam 13.73 13.88 13.47 Plasma Membrane Cldn10a 13.37 13.57 13.46 -
Investigating Cone Photoreceptor Development Using Patient-Derived NRL Null Retinal Organoids
ARTICLE https://doi.org/10.1038/s42003-020-0808-5 OPEN Investigating cone photoreceptor development using patient-derived NRL null retinal organoids Alyssa Kallman1,11, Elizabeth E. Capowski 2,11, Jie Wang 3, Aniruddha M. Kaushik4, Alex D. Jansen2, Kimberly L. Edwards2, Liben Chen4, Cynthia A. Berlinicke3, M. Joseph Phillips2,5, Eric A. Pierce6, Jiang Qian3, ✉ ✉ Tza-Huei Wang4,7, David M. Gamm2,5,8 & Donald J. Zack 1,3,9,10 1234567890():,; Photoreceptor loss is a leading cause of blindness, but mechanisms underlying photoreceptor degeneration are not well understood. Treatment strategies would benefit from improved understanding of gene-expression patterns directing photoreceptor development, as many genes are implicated in both development and degeneration. Neural retina leucine zipper (NRL) is critical for rod photoreceptor genesis and degeneration, with NRL mutations known to cause enhanced S-cone syndrome and retinitis pigmentosa. While murine Nrl loss has been characterized, studies of human NRL can identify important insights for human retinal development and disease. We utilized iPSC organoid models of retinal development to molecularly define developmental alterations in a human model of NRL loss. Consistent with the function of NRL in rod fate specification, human retinal organoids lacking NRL develop S- opsin dominant photoreceptor populations. We report generation of two distinct S-opsin expressing populations in NRL null retinal organoids and identify MEF2C as a candidate regulator of cone development. 1 Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, USA. 2 Waisman Center, University of Wisconsin-Madison, Madison, USA. 3 Department of Ophthalmology, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, USA. -
Identification of Functional Thyroid Stimulating Hormone Receptor And
ANTICANCER RESEARCH 38 : 2793-2802 (2018) doi:10.21873/anticanres.12523 Identification of Functional Thyroid Stimulating Hormone Receptor and TSHR Gene Mutations in Hepatocellular Carcinoma YU-LIN SHIH 1,2 , YA-HUI HUANG 1, KWANG-HUEI LIN 1,3 , YU-DE CHU 1 and CHAU-TING YEH 1,2 1Liver Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan, R.O.C.; 2Molecular Medicine Research Center, Chang Gung University, Taoyuan, Taiwan, R.O.C.; 3Department of Biochemistry, School of Medicine, Chang Gung University, Taoyuan, Taiwan, R.O.C. Abstract. Background/Aim: Extra-thyroid expression of viral hepatitis, alcohol abuse, non-alcoholic steatohepatitis, thyroid stimulating hormone (TSH) receptor (TSHR) has diabetes, aflatoxin, and cirrhosis (2). HCC can be treated by been reported in normal liver tissues, but never assessed in being completely removed/eradicated, with a liver hepatocellular carcinoma (HCC). Patients and Methods: transplantation, transcatheter arterial chemoembolization, or Paired cancerous and non-cancerous HCC tissues were with the use of targeted agents or systemic chemotherapy, analyzed with TSHR expression assays. TSHR functional depending on the clinical stage of the disease (3-5). Owing assessments and sequence analysis for the TSHR exon-10 to the asymptomatic nature of this disease, a great majority were performed. Results: TSHR overexpression was found in of patients (>50%) are diagnosed in the intermediate and 150/197 (76.1%) HCCs. Higher TSHR expression was advanced stages in Taiwan (6). associated with unfavorable postoperative outcomes. Thyroid hormone plays an essential role in the growth, Immunohistochemical analysis revealed predominantly maturation, differentiation and metabolism of normal cells nuclei/peri-nuclei localization of TSHR in cancerous tissues (7). -
ILC2 Activation by Protozoan Commensal Microbes
International Journal of Molecular Sciences Review ILC2 Activation by Protozoan Commensal Microbes Kyle Burrows 1 , Louis Ngai 1 , Flora Wong 1,2, David Won 1 and Arthur Mortha 1,* 1 University of Toronto, Department of Immunology, Toronto, ON M5S 1A8, Canada; [email protected] (K.B.) [email protected] (L.N.); fl[email protected] (F.W.); [email protected] (D.W.) 2 Ranomics, Inc. Toronto, ON M5G 1X5, Canada * Correspondence: [email protected] Received: 3 September 2019; Accepted: 27 September 2019; Published: 30 September 2019 Abstract: Group 2 innate lymphoid cells (ILC2s) are a member of the ILC family and are involved in protective and pathogenic type 2 responses. Recent research has highlighted their involvement in modulating tissue and immune homeostasis during health and disease and has uncovered critical signaling circuits. While interactions of ILC2s with the bacterial microbiome are rather sparse, other microbial members of our microbiome, including helminths and protozoans, reveal new and exciting mechanisms of tissue regulation by ILC2s. Here we summarize the current field on ILC2 activation by the tissue and immune environment and highlight particularly new intriguing pathways of ILC2 regulation by protozoan commensals in the intestinal tract. Keywords: ILC2; protozoa; Trichomonas; Tritrichomonas musculis; mucosal immunity; taste receptors; succinate; intestinal immunity; type 2 immunity; commensals 1. The ILC Lineage 1.1. The Family of Innate Lymphoid Cells Research over the last decade has redirected focus away from classical immune cell interactions within lymphoid tissues towards immunity within non-lymphoid tissues. Within these tissues, immune interactions involve local adaptation and rapid responses by tissue-resident immune cells. -
Constitutive Activation of G Protein-Coupled Receptors and Diseases: Insights Into Mechanisms of Activation and Therapeutics
Pharmacology & Therapeutics 120 (2008) 129–148 Contents lists available at ScienceDirect Pharmacology & Therapeutics journal homepage: www.elsevier.com/locate/pharmthera Associate editor: S. Enna Constitutive activation of G protein-coupled receptors and diseases: Insights into mechanisms of activation and therapeutics Ya-Xiong Tao ⁎ Department of Anatomy, Physiology and Pharmacology, 212 Greene Hall, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA article info abstract The existence of constitutive activity for G protein-coupled receptors (GPCRs) was first described in 1980s. In Keywords: 1991, the first naturally occurring constitutively active mutations in GPCRs that cause diseases were reported G protein-coupled receptor Disease in rhodopsin. Since then, numerous constitutively active mutations that cause human diseases were reported Constitutively active mutation in several additional receptors. More recently, loss of constitutive activity was postulated to also cause Inverse agonist diseases. Animal models expressing some of these mutants confirmed the roles of these mutations in the Mechanism of activation pathogenesis of the diseases. Detailed functional studies of these naturally occurring mutations, combined Transgenic model with homology modeling using rhodopsin crystal structure as the template, lead to important insights into the mechanism of activation in the absence of crystal structure of GPCRs in active state. Search for inverse Abbreviations: agonists on these receptors will be critical for correcting the diseases cause by activating mutations in GPCRs. ADRP, autosomal dominant retinitis pigmentosa Theoretically, these inverse agonists are better therapeutics than neutral antagonists in treating genetic AgRP, Agouti-related protein AR, adrenergic receptor diseases caused by constitutively activating mutations in GPCRs. CAM, constitutively active mutant © 2008 Elsevier Inc. -
Neural Regulation of Interactions Between Group 2 Innate Lymphoid Cells and Pulmonary Immune Cells
Prime Archives in Immunology: 2nd Edition Book Chapter Neural Regulation of Interactions between Group 2 Innate Lymphoid Cells and Pulmonary Immune Cells Weiwei Chen1,2, Qiang Shu2 and Jie Fan1,3,4* 1Department of Surgery, University of Pittsburgh School of Medicine, USA 2The Children‟s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, China 3Research and Development, Veterans Affairs Pittsburgh Healthcare System, USA 4McGowan Institute for Regenerative Medicine, University of Pittsburgh, USA *Corresponding Author: Jie Fan, Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA Published January 18, 2021 This Book Chapter is a republication of an article published by Jie Fan, et al. at Frontiers in Immunology in October 2020. (Chen W, Shu Q and Fan J (2020) Neural Regulation of Interactions Between Group 2 Innate Lymphoid Cells and Pulmonary Immune Cells. Front. Immunol. 11:576929. doi: 10.3389/fimmu.2020.576929) How to cite this book chapter: Weiwei Chen, Qiang Shu, Jie Fan. Neural Regulation of Interactions between Group 2 Innate Lymphoid Cells and Pulmonary Immune Cells. In: Ajmal Khan, Ahmed Al-Harrasi, editors. Prime Archives in Immunology: 2nd Edition. Hyderabad, India: Vide Leaf. 2021. 1 www.videleaf.com Prime Archives in Immunology: 2nd Edition © The Author(s) 2021. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License(http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Author Contributions: WC collected the data and drafted the manuscript. WC, QS, and JF conceived and designed the study. -
REVIEW G-Protein-Coupled Receptors, Cholesterol and Palmitoylation: Facts
371 REVIEW G-protein-coupled receptors, cholesterol and palmitoylation: facts about fats Bice Chini and Marco Parenti1 Cellular and Molecular Pharmacology Section, CNR Institute of Neuroscience, Via Vanvitelli 32, 20129 Milan, Italy 1Department of Experimental Medicine, University of Milano-Bicocca, Monza, Italy (Correspondence should be addressed to B Chini; Email: [email protected]) Abstract G-protein-coupled receptors (GPCRs) are integral membrane proteins, hence it is not surprising that a number of their structural and functional features are modulated by both proteins and lipids. The impact of interacting proteins and lipids on the assembly and signalling of GPCRs has been extensively investigated over the last 20–30 years, and a further impetus has been given by the proposal that GPCRs and/or their immediate signalling partners (G proteins) can partition within plasma membrane domains, termed rafts and caveolae, enriched in glycosphingolipids and cholesterol. The high content of these specific lipids, in particular of cholesterol, in the vicinity of GPCR transmembranes can affect GPCR structure and/or function. In addition, most GPCRs are post-translationally modified with one or more palmitic acid(s), a 16-carbon saturated fatty acid, covalently bound to cysteine(s) localised in the carboxyl-terminal cytoplasmic tail. The insertion of palmitate into the cytoplasmic leaflet of the plasma membrane can create a fourth loop, thus profoundly affecting GPCR structure and hence the interactions with intracellular partner proteins. This review briefly highlights how lipids of the membrane and the receptor themselves can influence GPCR organisation and functioning. Journal of Molecular Endocrinology (2009) 42, 371–379 G-protein-coupled receptors–cholesterol of phospholipids. -
Quantigene Flowrna Probe Sets Currently Available
QuantiGene FlowRNA Probe Sets Currently Available Accession No. Species Symbol Gene Name Catalog No. NM_003452 Human ZNF189 zinc finger protein 189 VA1-10009 NM_000057 Human BLM Bloom syndrome VA1-10010 NM_005269 Human GLI glioma-associated oncogene homolog (zinc finger protein) VA1-10011 NM_002614 Human PDZK1 PDZ domain containing 1 VA1-10015 NM_003225 Human TFF1 Trefoil factor 1 (breast cancer, estrogen-inducible sequence expressed in) VA1-10016 NM_002276 Human KRT19 keratin 19 VA1-10022 NM_002659 Human PLAUR plasminogen activator, urokinase receptor VA1-10025 NM_017669 Human ERCC6L excision repair cross-complementing rodent repair deficiency, complementation group 6-like VA1-10029 NM_017699 Human SIDT1 SID1 transmembrane family, member 1 VA1-10032 NM_000077 Human CDKN2A cyclin-dependent kinase inhibitor 2A (melanoma, p16, inhibits CDK4) VA1-10040 NM_003150 Human STAT3 signal transducer and activator of transcripton 3 (acute-phase response factor) VA1-10046 NM_004707 Human ATG12 ATG12 autophagy related 12 homolog (S. cerevisiae) VA1-10047 NM_000737 Human CGB chorionic gonadotropin, beta polypeptide VA1-10048 NM_001017420 Human ESCO2 establishment of cohesion 1 homolog 2 (S. cerevisiae) VA1-10050 NM_197978 Human HEMGN hemogen VA1-10051 NM_001738 Human CA1 Carbonic anhydrase I VA1-10052 NM_000184 Human HBG2 Hemoglobin, gamma G VA1-10053 NM_005330 Human HBE1 Hemoglobin, epsilon 1 VA1-10054 NR_003367 Human PVT1 Pvt1 oncogene homolog (mouse) VA1-10061 NM_000454 Human SOD1 Superoxide dismutase 1, soluble (amyotrophic lateral sclerosis 1 (adult))