2017 New Mesh Headings by Subcategory
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Exploring and Potentiating Human Bone Marrow Derived Mesenchymal Stem Cells [hBMSCs] and Differentiated Islets for Effective Diabetes Therapy ABBREVIATION LIST OF ABBREVIATION AF555-Alexa Fluor 555 EBs- Embryoid bodies AGE- advanced glycosylation end-product EDTA- Ethylenediaminetetraacetic acid aPKC- Atypical protein kinase C EGF-Epidermal growth factor ANOVA-Analysis of variance EGFR- epidermal growth factor receptor Arx- Aristaless-related homeobox gene EL- Enicostemma littorale ATP- Adenosine triphosphate ELISA- Enzyme linked immunosorbent bHLH- Basic helix–loop–helix assay BM- Bone marrow EMT - epithelial–mesenchymal transition BMC- Bioactive molecules cocktail ESCs- Embryonic stem cells BMP-bone morphogenic protein FACS- Fluorescent activated cell sorter BSA- Bovine serum albumin FBS- Fetal Bovine Serum cAMP- Cyclic Adenosine monophosphate FDA- Food and Drug Administration CaCl2 –Calcium chloride FGF- Fibroblast growth factor CD-Cluster of differentiation FITC- Fluorescein isothiocyanate cDNA –Complementary DNA FOXO1-Forkhead box protein O1 ChIP-Chromatin immunoprecipitation FOXA2 - Forkhead box protein A2 CCl4- Carbon tetrachloride GAD- Glutamate decarboxylase CDK- Cyclin dependent kinase GATA4 -(GATA Binding Protein 4) CK-Cytokeratin GATA6- (GATA Binding Protein 6) CNS- Central Nervous System GCK- Glucokinase CPCSEA- Committee for the purpose of GFP- Green Fluorescent protein control and supervision of experiments on GLP-1- Glucagon-like peptide-1 animals GLUT- Glucose Transporter DAPI- 4’6’-diamidino-2-phenylindole GPx- Glutathione peroxidase Dihydrochloride GSH- Reduced glutathione DCFDA- 2',7' –dichlorofluorescin diacetate GSIS- Glucose-stimulated insulin secretion DM-Diabetes mellitus GTT- Glucose tolerance test DMEM- KO -Dulbecco’s Modified Eagle H & E- Hematoxylin and Eosin Media-Knock out hBMSCs: Human bone marrow-derived DMSO- Dimethyl Sulphoxide mesenchymal stem cell DTZ- Dithizone HGF- Hepatocyte Growth Factor Mitul Vakani. -
ERG Dependence Distinguishes Developmental Control of Hematopoietic Stem Cell Maintenance from Hematopoietic Specification
Downloaded from genesdev.cshlp.org on September 28, 2021 - Published by Cold Spring Harbor Laboratory Press ERG dependence distinguishes developmental control of hematopoietic stem cell maintenance from hematopoietic specification Samir Taoudi,1,2,6 Thomas Bee,3 Adrienne Hilton,1 Kathy Knezevic,3 Julie Scott,4 Tracy A. Willson,1,2 Caitlin Collin,1 Tim Thomas,1,2 Anne K. Voss,1,2 Benjamin T. Kile,1,2 Warren S. Alexander,2,5 John E. Pimanda,3 and Douglas J. Hilton1,2 1Molecular Medicine Division, The Walter and Eliza Institute of Medical Research, Melbourne, Parkville, Victoria 3052, Australia; 2Department of Medical Biology, The University of Melbourne, Melbourne, Parkville, Victoria 3010, Australia; 3Lowy Cancer Research Centre, The Prince of Wales Clinical School, University of New South Wales, Sydney 2052, Australia; 4Microinjection Services, The Walter and Eliza Institute of Medical Research, Melbourne, Parkville, Victoria 3052, Australia; 5Cancer and Haematology Division, The Walter and Eliza Institute of Medical Research, Melbourne, Parkville, Victoria 3052, Australia Although many genes are known to be critical for early hematopoiesis in the embryo, it remains unclear whether distinct regulatory pathways exist to control hematopoietic specification versus hematopoietic stem cell (HSC) emergence and function. Due to their interaction with key regulators of hematopoietic commitment, particular interest has focused on the role of the ETS family of transcription factors; of these, ERG is predicted to play an important role in the initiation of hematopoiesis, yet we do not know if or when ERG is required. Using in vitro and in vivo models of hematopoiesis and HSC development, we provide strong evidence that ERG is at the center of a distinct regulatory program that is not required for hematopoietic specification or differentiation but is critical for HSC maintenance during embryonic development. -
Ubiquitin-Mediated Control of ETS Transcription Factors: Roles in Cancer and Development
International Journal of Molecular Sciences Review Ubiquitin-Mediated Control of ETS Transcription Factors: Roles in Cancer and Development Charles Ducker * and Peter E. Shaw * Queen’s Medical Centre, School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK * Correspondence: [email protected] (C.D.); [email protected] (P.E.S.) Abstract: Genome expansion, whole genome and gene duplication events during metazoan evolution produced an extensive family of ETS genes whose members express transcription factors with a conserved winged helix-turn-helix DNA-binding domain. Unravelling their biological roles has proved challenging with functional redundancy manifest in overlapping expression patterns, a common consensus DNA-binding motif and responsiveness to mitogen-activated protein kinase signalling. Key determinants of the cellular repertoire of ETS proteins are their stability and turnover, controlled largely by the actions of selective E3 ubiquitin ligases and deubiquitinases. Here we discuss the known relationships between ETS proteins and enzymes that determine their ubiquitin status, their integration with other developmental signal transduction pathways and how suppression of ETS protein ubiquitination contributes to the malignant cell phenotype in multiple cancers. Keywords: E3 ligase complex; deubiquitinase; gene fusions; mitogens; phosphorylation; DNA damage 1. Introduction Citation: Ducker, C.; Shaw, P.E. Cell growth, proliferation and differentiation are complex, concerted processes that Ubiquitin-Mediated Control of ETS Transcription Factors: Roles in Cancer rely on careful regulation of gene expression. Control over gene expression is maintained and Development. Int. J. Mol. Sci. through signalling pathways that respond to external cellular stimuli, such as growth 2021, 22, 5119. https://doi.org/ factors, cytokines and chemokines, that invoke expression profiles commensurate with 10.3390/ijms22105119 diverse cellular outcomes. -
Inducible Transgene Expression in PDX Models
Liu et al. Biomarker Research (2020) 8:46 https://doi.org/10.1186/s40364-020-00226-z RESEARCH Open Access Inducible transgene expression in PDX models in vivo identifies KLF4 as a therapeutic target for B-ALL Wen-Hsin Liu1, Paulina Mrozek-Gorska2, Anna-Katharina Wirth1, Tobias Herold1,3, Larissa Schwarzkopf1, Dagmar Pich2, Kerstin Völse1, M. Camila Melo-Narváez2, Michela Carlet1, Wolfgang Hammerschmidt2,4 and Irmela Jeremias1,5,6* Abstract Background: Clinically relevant methods are not available that prioritize and validate potential therapeutic targets for individual tumors, from the vast amount of tumor descriptive expression data. Methods: We established inducible transgene expression in clinically relevant patient-derived xenograft (PDX) models in vivo to fill this gap. Results: With this technique at hand, we analyzed the role of the transcription factor Krüppel-like factor 4 (KLF4) in B-cell acute lymphoblastic leukemia (B-ALL) PDX models at different disease stages. In competitive preclinical in vivo trials, we found that re-expression of wild type KLF4 reduced the leukemia load in PDX models of B-ALL, with the strongest effects being observed after conventional chemotherapy in minimal residual disease (MRD). A nonfunctional KLF4 mutant had no effect on this model. The re-expression of KLF4 sensitized tumor cells in the PDX model towards systemic chemotherapy in vivo. It is of major translational relevance that azacitidine upregulated KLF4 levels in the PDX model and a KLF4 knockout reduced azacitidine-induced cell death, suggesting that azacitidine can regulate KLF4 re-expression. These results support the application of azacitidine in patients with B-ALL as a therapeutic option to regulate KLF4. -
Ten Commandments for a Good Scientist
Unravelling the mechanism of differential biological responses induced by food-borne xeno- and phyto-estrogenic compounds Ana María Sotoca Covaleda Wageningen 2010 Thesis committee Thesis supervisors Prof. dr. ir. Ivonne M.C.M. Rietjens Professor of Toxicology Wageningen University Prof. dr. Albertinka J. Murk Personal chair at the sub-department of Toxicology Wageningen University Thesis co-supervisor Dr. ir. Jacques J.M. Vervoort Associate professor at the Laboratory of Biochemistry Wageningen University Other members Prof. dr. Michael R. Muller, Wageningen University Prof. dr. ir. Huub F.J. Savelkoul, Wageningen University Prof. dr. Everardus J. van Zoelen, Radboud University Nijmegen Dr. ir. Toine F.H. Bovee, RIKILT, Wageningen This research was conducted under the auspices of the Graduate School VLAG Unravelling the mechanism of differential biological responses induced by food-borne xeno- and phyto-estrogenic compounds Ana María Sotoca Covaleda Thesis submitted in fulfillment of the requirements for the degree of doctor at Wageningen University by the authority of the Rector Magnificus Prof. dr. M.J. Kropff, in the presence of the Thesis Committee appointed by the Academic Board to be defended in public on Tuesday 14 September 2010 at 4 p.m. in the Aula Unravelling the mechanism of differential biological responses induced by food-borne xeno- and phyto-estrogenic compounds. Ana María Sotoca Covaleda Thesis Wageningen University, Wageningen, The Netherlands, 2010, With references, and with summary in Dutch. ISBN: 978-90-8585-707-5 “Caminante no hay camino, se hace camino al andar. Al andar se hace camino, y al volver la vista atrás se ve la senda que nunca se ha de volver a pisar” - Antonio Machado – A mi madre. -
Identifying the Role of Wilms Tumor 1 Associated Protein in Cancer Prediction Using Integrative Genomic Analyses
MOLECULAR MEDICINE REPORTS 14: 2823-2831, 2016 Identifying the role of Wilms tumor 1 associated protein in cancer prediction using integrative genomic analyses LI‑SHENG WU1*, JIA-YI QIAN2*, MINGHAI WANG3* and HAIWEI YANG4 1Department of General Surgery, Anhui Provincial Hospital, Anhui Medical University, Hefei, Anhui 230001; 2Department of Breast Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029; 3Department of General Surgery, The First Affiliated Yijishan Hospital of Wannan Medical College, Wuhu, Anhui 241002; 4Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China Received August 31, 2015; Accepted June 2, 2016 DOI: 10.3892/mmr.2016.5528 Abstract. The Wilms tumor suppressor, WT1 was first iden- regulatory factor 1, glucocorticoid receptor and peroxisome tified due to its essential role in the normal development of proliferator‑activated receptor γ transcription factor binding the human genitourinary system. Wilms tumor 1 associated sites were identified in the upstream (promoter) region of the protein (WTAP) was subsequently revealed to interact with human WTAP gene, suggesting that these transcription factors WT1 using yeast two‑hybrid screening. The present study may be involved in WTAP functions in tumor formation. identified 44 complete WTAP genes in the genomes of verte- brates, including fish, amphibians, birds and mammals. The Introduction vertebrate WTAP proteins clustered into the primate, rodent and teleost lineages using phylogenetic tree analysis. From The Wilms tumor suppressor gene WT1 was first identified 1,347 available SNPs in the human WTAP gene, 19 were due to its essential role in the normal development of the identified to cause missense mutations. -
SMAD3/Stat3 Signaling Mediates Β-Cell Epithelial-Mesenchymal
2646 Diabetes Volume 66, October 2017 SMAD3/Stat3 Signaling Mediates b-Cell Epithelial- Mesenchymal Transition in Chronic Pancreatitis–Related Diabetes Xiangwei Xiao,1 Shane Fischbach,1 Tina Zhang,1,2 Congde Chen,1 Qingfeng Sheng,1 Ray Zimmerman,1 Sneha Patnaik,1 Joseph Fusco,1 Yungching Ming,1 Ping Guo,1 Chiyo Shiota,1 Krishna Prasadan,1 Nupur Gangopadhyay,1 Sohail Z. Husain,3 Henry Dong,2 and George K. Gittes1 Diabetes 2017;66:2646–2658 | https://doi.org/10.2337/db17-0537 Many patients with chronic pancreatitis develop diabetes Many patients with chronic pancreatitis develop insulinopenia, (chronic pancreatitis–related diabetes [CPRD]) through an glucose intolerance, insulin resistance, and eventually diabetes undetermined mechanism. Here we used long-term par- (2), largely as a result of the intimate proximity of the tial pancreatic duct ligation (PDL) as a model to study CPRD. endocrine pancreas to the exocrine pancreas (3). Moreover, We found that long-term PDL induced significant b-cell de- patients with chronic pancreatitis often develop a fibrotic differentiation, followed by a time-dependent decrease in pancreas with a reduced b-cell mass and have a 15- to b — fi functional -cell mass all speci cally in the ligated tail 16-fold increased risk for pancreatic cancer (4). To date, the portion of the pancreas (PDL-tail). High levels of transform- understanding of the development and pathogenesis of b b ing growth factor 1(TGF 1) were detected in the PDL-tail chronic pancreatitis–relateddiabetes(CPRD)isverylimited. and were mainly produced by M2 macrophages at the In addition, the mechanisms of b-cell loss in CPRD may in early stage and by activated myofibroblasts at the later part be similar to those in type 2 diabetes (T2D) (5,6) and in stage. -
RUNX1 Together with a Compendium of Hematopoietic Regulators, Chromatin Modifiers and Basal Transcr
Leukemia (2014) 28, 770–778 OPEN & 2014 Macmillan Publishers Limited All rights reserved 0887-6924/14 www.nature.com/leu ORIGINAL ARTICLE CBFB–MYH11/RUNX1 together with a compendium of hematopoietic regulators, chromatin modifiers and basal transcription factors occupies self-renewal genes in inv(16) acute myeloid leukemia A Mandoli1, AA Singh1, PWTC Jansen2, ATJ Wierenga3,4, H Riahi1, G Franci5, K Prange1, S Saeed1, E Vellenga3, M Vermeulen2, HG Stunnenberg1 and JHA Martens1 Different mechanisms for CBFb–MYH11 function in acute myeloid leukemia with inv(16) have been proposed such as tethering of RUNX1 outside the nucleus, interference with transcription factor complex assembly and recruitment of histone deacetylases, all resulting in transcriptional repression of RUNX1 target genes. Here, through genome-wide CBFb–MYH11-binding site analysis and quantitative interaction proteomics, we found that CBFb–MYH11 localizes to RUNX1 occupied promoters, where it interacts with TAL1, FLI1 and TBP-associated factors (TAFs) in the context of the hematopoietic transcription factors ERG, GATA2 and PU.1/SPI1 and the coregulators EP300 and HDAC1. Transcriptional analysis revealed that upon fusion protein knockdown, a small subset of the CBFb–MYH11 target genes show increased expression, confirming a role in transcriptional repression. However, the majority of CBFb–MYH11 target genes, including genes implicated in hematopoietic stem cell self-renewal such as ID1, LMO1 and JAG1, are actively transcribed and repressed upon fusion protein knockdown. Together these results suggest an essential role for CBFb–MYH11 in regulating the expression of genes involved in maintaining a stem cell phenotype. Leukemia (2014) 28, 770–778; doi:10.1038/leu.2013.257 Keywords: CBFb–MYH11; RUNX1; histone acetylation; acute myeloid leukemia; inv(16) INTRODUCTION Heterozygous Cbfb-Myh11 knock-in mice are embryonic lethal, Core-binding transcription factors (CBFs) have roles in stem cell with definitive hematopoiesis blocked at the stem-cell level. -
The Histone Methyltransferase MMSET/WHSC1 Activates TWIST1 to Promote an Epithelial–Mesenchymal Transition and Invasive Properties of Prostate Cancer
Oncogene (2013) 32, 2882–2890 & 2013 Macmillan Publishers Limited All rights reserved 0950-9232/13 www.nature.com/onc ORIGINAL ARTICLE The histone methyltransferase MMSET/WHSC1 activates TWIST1 to promote an epithelial–mesenchymal transition and invasive properties of prostate cancer T Ezponda1, R Popovic1, MY Shah1, E Martinez-Garcia1, Y Zheng2, D-J Min1, C Will1, A Neri3, NL Kelleher1,2,JYu1 and JD Licht1 Epigenetic deregulation of gene expression has a role in the initiation and progression of prostate cancer (PCa). The histone methyltransferase MMSET/WHSC1 (Multiple Myeloma SET domain) is overexpressed in a number of metastatic tumors, but its mechanism of action has not been defined. In this work, we found that PCa cell lines expressed significantly higher levels of MMSET compared with immortalized, non-transformed prostate cells. Knockdown experiments showed that, in metastatic PCa cell lines, dimethylation of lysine 36 and trimethylation of lysine 27 on histone H3 (H3K36me2 and H3K27me3, respectively) depended on MMSET expression, whereas depletion of MMSET in benign prostatic cells did not affect chromatin modifications. Knockdown of MMSET in DU145 and PC-3 tumor cells decreased cell proliferation, colony formation in soft agar and strikingly diminished cell migration and invasion. Conversely, overexpression of MMSET in immortalized, non-transformed RWPE-1 cells promoted cell migration and invasion, accompanied by an epithelial–mesenchymal transition (EMT). Among a panel of EMT-promoting genes analyzed, TWIST1 expression was strongly activated in response to MMSET. Chromatin immunoprecipitation analysis demonstrated that MMSET binds to the TWIST1 locus and leads to an increase in H3K36me2, suggesting a direct role of MMSET in the regulation of this gene. -
The Role of Epigenomics in Osteoporosis and Osteoporotic Vertebral Fracture
International Journal of Molecular Sciences Review The Role of Epigenomics in Osteoporosis and Osteoporotic Vertebral Fracture Kyoung-Tae Kim 1,2 , Young-Seok Lee 1,3 and Inbo Han 4,* 1 Department of Neurosurgery, School of Medicine, Kyungpook National University, Daegu 41944, Korea; [email protected] (K.-T.K.); [email protected] (Y.-S.L.) 2 Department of Neurosurgery, Kyungpook National University Hospital, Daegu 41944, Korea 3 Department of Neurosurgery, Kyungpook National University Chilgok Hospital, Daegu 41944, Korea 4 Department of Neurosurgery, CHA University School of medicine, CHA Bundang Medical Center, Seongnam-si, Gyeonggi-do 13496, Korea * Correspondence: [email protected]; Tel.: +82-31-780-1924; Fax: +82-31-780-5269 Received: 6 November 2020; Accepted: 8 December 2020; Published: 11 December 2020 Abstract: Osteoporosis is a complex multifactorial condition of the musculoskeletal system. Osteoporosis and osteoporotic vertebral fracture (OVF) are associated with high medical costs and can lead to poor quality of life. Genetic factors are important in determining bone mass and structure, as well as any predisposition for bone degradation and OVF. However, genetic factors are not enough to explain osteoporosis development and OVF occurrence. Epigenetics describes a mechanism for controlling gene expression and cellular processes without altering DNA sequences. The main mechanisms in epigenetics are DNA methylation, histone modifications, and non-coding RNAs (ncRNAs). Recently, alterations in epigenetic mechanisms and their activity have been associated with osteoporosis and OVF. Here, we review emerging evidence that epigenetics contributes to the machinery that can alter DNA structure, gene expression, and cellular differentiation during physiological and pathological bone remodeling. -
GATA3-Controlled Nucleosome Eviction Drives MYC Enhancer Activity in T-Cell Development and Leukemia
Published OnlineFirst September 13, 2019; DOI: 10.1158/2159-8290.CD-19-0471 RESEARCH ARTICLE GATA3-Controlled Nucleosome Eviction Drives MYC Enhancer Activity in T-cell Development and Leukemia Laura Belver1, Alexander Y. Yang1, Robert Albero1, Daniel Herranz2,3, Francesco G. Brundu4, S. Aidan Quinn1, Pablo Pérez-Durán1, Silvia Álvarez1, Francesca Gianni1, Marissa Rashkovan1, Devya Gurung1, Pedro P. Rocha5, Ramya Raviram6,7, Clara Reglero1, Jose R. Cortés1, Anisha J. Cooke1, Agnieszka A. Wendorff1, Valentina Cordó8, Jules P. Meijerink8, Raúl Rabadan4,9, and Adolfo A. Ferrando1,4,10,11 ABSTRACT Long-range enhancers govern the temporal and spatial control of gene express ion; however, the mechanisms that regulate enhancer activity during normal and malig- nant development remain poorly understood. Here, we demonstrate a role for aberrant chromatin acces- sibility in the regulation of MYC expression in T-cell lymphoblastic leukemia (T-ALL). Central to this process, the NOTCH1-MYC enhancer (N-Me), a long-range T cell–specificMYC enhancer, shows dynamic changes in chromatin accessibility during T-cell specification and maturation and an aberrant high degree of chromatin accessibility in mouse and human T-ALL cells. Mechanistically, we demonstrate that GATA3- driven nucleosome eviction dynamically modulates N-Me enhancer activity and is strictly required for NOTCH1-induced T-ALL initiation and maintenance. These results directly implicate aberrant regulation of chromatin accessibility at oncogenic enhancers as a mechanism of leukemic transformation. SIGNIFICANCE: MYC is a major effector of NOTCH1 oncogenic programs in T-ALL. Here, we show a major role for GATA3-mediated enhancer nucleosome eviction as a driver of MYC expression and leuke- mic transformation. -
The Erg Gene: a Human Gene Related to the Ets Oncogene (Cloning/Sequencing/Expression/Oncogene Homology) E
Proc. Nati. Acad. Sci. USA Vol. 84, pp. 6131-6135, September 1987 Biochemistry The erg gene: A human gene related to the ets oncogene (cloning/sequencing/expression/oncogene homology) E. SHYAM P. REDDY*t, VEENA N. RAOI, AND TAKIS S. PAPAS: tLaboratory of Molecular Oncology and *Programme Resources, Inc., National Cancer Institute, Frederick, MD 21701 Communicated by Max Tishler, May 26, 1987 ABSTRACT We have isolated a cDNA clone representing the complete coding sequence of a human gene named erg, RP C P R P R C R related to the ets oncogene. Nucleotide sequence analysis of this X7 ,i cDNA (4.6 kilobases long) revealed that this gene encodes a (erg 1) ATG TAA AATAAA 363-residue protein whose predicted amino acid sequence showed a homology of -40% and -7O% to two domains corresponding to the 5' and 3' regions of v-ets oncogene, 200 bp respectively. A 3.2- to 3.6-kilobase and -5-kilobase transcript FIG. 1. Analysis of the coding region of the -5-kb human ergl of the erg gene, which differ in size from those ofthe previously mRNA performed on a single phage "4.6-kb cDNA spanning the described Hu-ets 1 and Hu-ets 2 genes, were observed in entire region. Hatched boxes represent 5' (left) and 3' (right) different cells. These results suggest that the erg gene is a homologous regions of v-ets oncogene. Initiation codon (ATG), member of the ets oncogene family. termination codon (TAA), and polyadenylylation signal (AATAAA) are also shown. Horizontal arrow represents an 8-bp sequence, a avian which is repeated twice as a direct repeat in another cDNA clone E26 is replication-defective acute leukemia virus, (erg2).