Variations in Microrna-25 Expression Influence the Severity of Diabetic
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Brief Genetics Report Haplotype Structures and Large
Brief Genetics Report Haplotype Structures and Large-Scale Association Testing of the 5 AMP-Activated Protein Kinase Genes PRKAA2, PRKAB1, and PRKAB2 With Type 2 Diabetes Maria W. Sun,1,2 Jennifer Y. Lee,1,2 Paul I.W. de Bakker,1,2,3 Noe¨l P. Burtt,2 Peter Almgren,4 Lennart Råstam,5 Tiinamaija Tuomi,6 Daniel Gaudet,7 Mark J. Daly,2,8 Joel N. Hirschhorn,2,3,9 David Altshuler,1,2,3,8,10 Leif Groop,4,6 and Jose C. Florez1,2,8,10 AMP-activated protein kinase (AMPK) is a key molecular plasma glucose, or insulin sensitivity. Several nominal asso- regulator of cellular metabolism, and its activity is induced ciations of variants in PRKAA2 and PRKAB1 with BMI appear by both metformin and thiazolidinedione antidiabetic med- to be consistent with statistical noise. Diabetes 55:849–855, ications. It has therefore been proposed both as a putative 2006 agent in the pathophysiology of type 2 diabetes and as a valid target for therapeutic intervention. Thus, the genes that encode the various AMPK subunits are intriguing ype 2 diabetes arises from the complex interplay candidates for the inherited basis of type 2 diabetes. We therefore set out to test for the association of common of various pathophysiologic mechanisms involv- variants in the genes that encode three selected AMPK ing peripheral insulin resistance and relative subunits with type 2 diabetes and related phenotypes. Of Tinsulin insufficiency. The final expression of the the seven genes that encode AMPK isoforms, we initially diabetic phenotype is strongly influenced by inheritance; chose PRKAA2, PRKAB1, and PRKAB2 because of their however, with the exception of rare monogenic forms of higher prior probability of association with type 2 diabetes, diabetes, common type 2 diabetes is thought to have a based on previous reports of genetic linkage, functional polygenic architecture (1). -
IP6K1 Upregulates the Formation of Processing Bodies by Promoting Proteome Remodeling on the Mrna Cap
bioRxiv preprint doi: https://doi.org/10.1101/2020.07.13.199828; this version posted July 13, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.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-NC-ND 4.0 International license. IP6K1 upregulates the formation of processing bodies by promoting proteome remodeling on the mRNA cap Akruti Shah1,2 and Rashna Bhandari1* 1Laboratory of Cell Signalling, Centre for DNA Fingerprinting and Diagnostics (CDFD), Inner Ring Road, Uppal, Hyderabad 500039, India. 2Graduate studies, Manipal Academy of Higher Education, Manipal 576104, India. *Correspondence to Rashna Bhandari; Email: [email protected] Running title: IP6K1 promotes mRNA turnover to induce P-bodies ORCID IDs Akruti Shah - 0000-0001-9557-4952 Rashna Bhandari - 0000-0003-3101-0204 This PDF file includes: Main Text Figures 1 to 6 Keywords mRNA decay/mRNA metabolism/P-bodies/translation suppression 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.07.13.199828; this version posted July 13, 2020. 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-NC-ND 4.0 International license. Abstract Inositol hexakisphosphate kinases (IP6Ks) are ubiquitously expressed small molecule kinases that catalyze the conversion of the inositol phosphate IP6 to 5-IP7. IP6Ks have been reported to influence cellular functions by protein-protein interactions independent of their enzymatic activity. -
Role of Estrogen Receptor Beta and the Isoflavone Genistein
WCP2018 OR28-3 Oral session White-to-brown adipose differentiation: role of estrogen receptor beta and the isoflavone genistein Alessandra Bitto, Federica Mannino, Natasha Irrera, Giovanni Pallio, Domenica Altavilla, Francesco Squadrito Clinical and experimental medicine, University of Messina, Italy The two types of fat cells in mammals brown and white have different functions. White adipose tissue (WAT) stores excess energy in the form of triglyceride and releases free fatty acids during caloric deficiency. Brown adipose tissue (BAT) on the other hand can dissipate energy through thermogenesis. Genistein can have an effect on energy expenditure UCP (uncoupling protein) expression and protect against the obesogenic effect of a high calorie diet. The effect of genistein in inducing white-to-brown transdifferentiation was investigated in 3T3-L1 cells differentiated into white adipocytes with a specific medium (DMEM 10% calf serum 1% penicillin/streptomycin 500 uM 3isobutyl1 methylxanthine 10ug/ml insulin 250 nM dexmethasone 8 ug/ml biotin and 4 ug/ml pantothenic acid). Fully differentiated white adipocytes were treated after 10 days with different genistein doses (10-50-100-200 uM) for 24-48h or left untreated. Two specific ER-beta and PPAR-gamma receptor inhibitors were also used to understand if genistein effects are mediated by the estrogen or the PPAR receptor. Also a CRISPR/Cas9 approach was used to delete either ER-beta or PPAR-gamma to clarify which receptor is involved in genistein action. Intracellular lipid accumulation was determined by oil-red-O staining after 24 and 48hours of treatment. The expression of UCP1 estrogen receptor alpha and beta PPARalpha and gamma DIO2 (Type II iodothyronine deiodinase) PRDM16 (PR domain containing 16) and CIDEA (cell death inducing DNA fragmentation factor) were evaluated by qPCR after 24 and 48hours of genistein treatment. -
Molecular Profile of Tumor-Specific CD8+ T Cell Hypofunction in a Transplantable Murine Cancer Model
Downloaded from http://www.jimmunol.org/ by guest on September 25, 2021 T + is online at: average * The Journal of Immunology , 34 of which you can access for free at: 2016; 197:1477-1488; Prepublished online 1 July from submission to initial decision 4 weeks from acceptance to publication 2016; doi: 10.4049/jimmunol.1600589 http://www.jimmunol.org/content/197/4/1477 Molecular Profile of Tumor-Specific CD8 Cell Hypofunction in a Transplantable Murine Cancer Model Katherine A. Waugh, Sonia M. Leach, Brandon L. Moore, Tullia C. Bruno, Jonathan D. Buhrman and Jill E. Slansky J Immunol cites 95 articles Submit online. Every submission reviewed by practicing scientists ? is published twice each month by Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts http://jimmunol.org/subscription Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html http://www.jimmunol.org/content/suppl/2016/07/01/jimmunol.160058 9.DCSupplemental This article http://www.jimmunol.org/content/197/4/1477.full#ref-list-1 Information about subscribing to The JI No Triage! Fast Publication! Rapid Reviews! 30 days* Why • • • Material References Permissions Email Alerts Subscription Supplementary The Journal of Immunology The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2016 by The American Association of Immunologists, Inc. All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. This information is current as of September 25, 2021. The Journal of Immunology Molecular Profile of Tumor-Specific CD8+ T Cell Hypofunction in a Transplantable Murine Cancer Model Katherine A. -
Letters to the Editor
LETTERS TO THE EDITOR The closely related rare and severe acute myeloid leukemias carrying EVI1 or PRDM16 rearrangements share singular biological features In a recent issue of Haematologica , Matsuo et al .1 pinpoint the pejorative effect of EVI1 overexpression in 18 acute myeloid leukemias (AML) with MLL rearrangements. However, EVI1 overexpression has also been reported in patients with translocations involving chromosome 3 and the EVI1 gene. 2,3 Because of the poor prognosis associated to these anomalies, it is important to investigate them at an early stage in order to adapt patient management. Indeed, previous reports 4-6 and the 2008 WHO classification 7 indi - cate that EVI1-rearranged (EVI1-r) AML display typical fea - tures, such as absence of thrombopenia, atypical megakary - Figure 1. Algorithm for the suspicion of EVI1 and PRDM16 AMLs. ocytes and multilineage dysplasia 2-4 which can be detected by current diagnostic reference methods. In this line, we compared a cohort of 17 EVI1-r AML, aged between 8 and 79-years old (median 54 years) to 1822 other cases of AML months. diagnosed in the same laboratory over 14 years. At diagno - This study consolidates the unusual base-line character - sis, there were similar hemoglobin levels or white blood istics and clinical features of EVI1-r AML cases. Moreover, cell counts in both groups. Median platelet counts were it indicates a very low rate of MPO expression in EVI1-r 9 9 123x10 /L, higher than 100x10 /L in 53% of EVI1-r AML AML patients. It is interesting to note that relationships patients, compared to 25% in the control AML population have been reported between EVI1 expression and MPO (P=0.02). -
MOZ and MORF, Two Large Mystic Hats in Normal and Cancer Stem Cells
Oncogene (2007) 26, 5408–5419 & 2007 Nature Publishing Group All rights reserved 0950-9232/07 $30.00 www.nature.com/onc REVIEW MOZ and MORF, two large MYSTic HATs in normal and cancer stem cells X-J Yang and M Ullah Molecular Oncology Group, Department of Medicine, McGill University Health Center, Montre´al, Que´bec, Canada Genes of the human monocytic leukemia zinc-finger protein pattern. For cancer biology, it is thus important to MOZ (HUGO symbol, MYST3) and its paralog MORF understand the fundamental mechanisms whereby chro- (MYST4) are rearranged in chromosome translocations matin structure and function are regulated. In the associated withacute myeloid leukemia and/or benign past two decades, our knowledge about regulation in uterine leiomyomata. Both proteins have intrinsic histone this field has exploded. Known regulatory mechanisms acetyltransferase activity and are components of quartet include chromatin assembly, ATP-dependent remodeling, complexes withnoncatalytic subunits containing thebromo- covalent modification, condensin-mediated condensation, domain, plant homeodomain-linked (PHD) finger and replacement with histone variants, and association of proline-tryptophan-tryptophan-proline (PWWP)-containing noncoding RNA (reviewed by Horn and Peterson, 2002; domain, three types of structural modules characteristic of Khorasanizadeh, 2004; Li et al., 2007). Covalent chromatin regulators. Although leukemia-derived fusion pro- modification can occur at both the DNA and histone teins suchas MOZ-TIF2 promote self-renewal of leukemic levels. With histones, modifications include acetylation, stem cells, recent studies indicate that murine MOZ and phosphorylation, methylation, ubiquitination, and many MORF are important for proper development of hema- others (for reviews, see Spencer and Davie, 1999; Strahl topoietic and neurogenic progenitors, respectively, thereby and Allis, 2000; Berger, 2002; Jason et al., 2002; highlighting the importance of epigenetic integrity in Kouzarides, 2007). -
Proteomic Identification of the Transcription Factors Ikaros And
European School of Molecular Medicine (SEMM) University of Milan and University of Naples “Federico II” PhD degree in Systems Medicine (curriculum in Molecular Oncology) Settore disciplinare: BIO/11 Proteomic identification of the transcription factors Ikaros and Aiolos as new Myc interactors on chromatin Chiara Veronica Locarno Matricola: R10755 Center for Genomic Science IIT@SEMM, Milan Supervisor: Bruno Amati, PhD IEO, Milan Added Supervisor: Arianna Sabò, PhD IEO, Milan Academic year 2017-2018 Table of contents List of abbreviations ........................................................................................................... 4 List of figures ....................................................................................................................... 8 List of tables ....................................................................................................................... 11 Abstract .............................................................................................................................. 12 1. INTRODUCTION ......................................................................................................... 13 1.1 Myc ........................................................................................................................................ 13 1.1.1 Myc discovery and structure ........................................................................................... 13 1.1.2. Role of Myc in physiological and pathological conditions ........................................... -
Modes of Interaction of KMT2 Histone H3 Lysine 4 Methyltransferase/COMPASS Complexes with Chromatin
cells Review Modes of Interaction of KMT2 Histone H3 Lysine 4 Methyltransferase/COMPASS Complexes with Chromatin Agnieszka Bochy ´nska,Juliane Lüscher-Firzlaff and Bernhard Lüscher * ID Institute of Biochemistry and Molecular Biology, Medical School, RWTH Aachen University, Pauwelsstrasse 30, 52057 Aachen, Germany; [email protected] (A.B.); jluescher-fi[email protected] (J.L.-F.) * Correspondence: [email protected]; Tel.: +49-241-8088850; Fax: +49-241-8082427 Received: 18 January 2018; Accepted: 27 February 2018; Published: 2 March 2018 Abstract: Regulation of gene expression is achieved by sequence-specific transcriptional regulators, which convey the information that is contained in the sequence of DNA into RNA polymerase activity. This is achieved by the recruitment of transcriptional co-factors. One of the consequences of co-factor recruitment is the control of specific properties of nucleosomes, the basic units of chromatin, and their protein components, the core histones. The main principles are to regulate the position and the characteristics of nucleosomes. The latter includes modulating the composition of core histones and their variants that are integrated into nucleosomes, and the post-translational modification of these histones referred to as histone marks. One of these marks is the methylation of lysine 4 of the core histone H3 (H3K4). While mono-methylation of H3K4 (H3K4me1) is located preferentially at active enhancers, tri-methylation (H3K4me3) is a mark found at open and potentially active promoters. Thus, H3K4 methylation is typically associated with gene transcription. The class 2 lysine methyltransferases (KMTs) are the main enzymes that methylate H3K4. KMT2 enzymes function in complexes that contain a necessary core complex composed of WDR5, RBBP5, ASH2L, and DPY30, the so-called WRAD complex. -
Defining Functional Interactions During Biogenesis of Epithelial Junctions
ARTICLE Received 11 Dec 2015 | Accepted 13 Oct 2016 | Published 6 Dec 2016 | Updated 5 Jan 2017 DOI: 10.1038/ncomms13542 OPEN Defining functional interactions during biogenesis of epithelial junctions J.C. Erasmus1,*, S. Bruche1,*,w, L. Pizarro1,2,*, N. Maimari1,3,*, T. Poggioli1,w, C. Tomlinson4,J.Lees5, I. Zalivina1,w, A. Wheeler1,w, A. Alberts6, A. Russo2 & V.M.M. Braga1 In spite of extensive recent progress, a comprehensive understanding of how actin cytoskeleton remodelling supports stable junctions remains to be established. Here we design a platform that integrates actin functions with optimized phenotypic clustering and identify new cytoskeletal proteins, their functional hierarchy and pathways that modulate E-cadherin adhesion. Depletion of EEF1A, an actin bundling protein, increases E-cadherin levels at junctions without a corresponding reinforcement of cell–cell contacts. This unexpected result reflects a more dynamic and mobile junctional actin in EEF1A-depleted cells. A partner for EEF1A in cadherin contact maintenance is the formin DIAPH2, which interacts with EEF1A. In contrast, depletion of either the endocytic regulator TRIP10 or the Rho GTPase activator VAV2 reduces E-cadherin levels at junctions. TRIP10 binds to and requires VAV2 function for its junctional localization. Overall, we present new conceptual insights on junction stabilization, which integrate known and novel pathways with impact for epithelial morphogenesis, homeostasis and diseases. 1 National Heart and Lung Institute, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK. 2 Computing Department, Imperial College London, London SW7 2AZ, UK. 3 Bioengineering Department, Faculty of Engineering, Imperial College London, London SW7 2AZ, UK. 4 Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, London SW7 2AZ, UK. -
Transcriptomic Characterization of Fibrolamellar Hepatocellular
Transcriptomic characterization of fibrolamellar PNAS PLUS hepatocellular carcinoma Elana P. Simona, Catherine A. Freijeb, Benjamin A. Farbera,c, Gadi Lalazara, David G. Darcya,c, Joshua N. Honeymana,c, Rachel Chiaroni-Clarkea, Brian D. Dilld, Henrik Molinad, Umesh K. Bhanote, Michael P. La Quagliac, Brad R. Rosenbergb,f, and Sanford M. Simona,1 aLaboratory of Cellular Biophysics, The Rockefeller University, New York, NY 10065; bPresidential Fellows Laboratory, The Rockefeller University, New York, NY 10065; cDivision of Pediatric Surgery, Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY 10065; dProteomics Resource Center, The Rockefeller University, New York, NY 10065; ePathology Core Facility, Memorial Sloan-Kettering Cancer Center, New York, NY 10065; and fJohn C. Whitehead Presidential Fellows Program, The Rockefeller University, New York, NY 10065 Edited by Susan S. Taylor, University of California, San Diego, La Jolla, CA, and approved September 22, 2015 (received for review December 29, 2014) Fibrolamellar hepatocellular carcinoma (FLHCC) tumors all carry a exon of DNAJB1 and all but the first exon of PRKACA. This deletion of ∼400 kb in chromosome 19, resulting in a fusion of the produced a chimeric RNA transcript and a translated chimeric genes for the heat shock protein, DNAJ (Hsp40) homolog, subfam- protein that retains the full catalytic activity of wild-type PKA. ily B, member 1, DNAJB1, and the catalytic subunit of protein ki- This chimeric protein was found in 15 of 15 FLHCC patients nase A, PRKACA. The resulting chimeric transcript produces a (21) in the absence of any other recurrent mutations in the DNA fusion protein that retains kinase activity. -
Miasdb: a Database of Molecular Interactions Associated with Alternative Splicing of Human Pre-Mrnas
RESEARCH ARTICLE MiasDB: A Database of Molecular Interactions Associated with Alternative Splicing of Human Pre-mRNAs Yongqiang Xing1, Xiujuan Zhao1, Tao Yu2, Dong Liang1, Jun Li1, Guanyun Wei1, Guoqing Liu1, Xiangjun Cui1, Hongyu Zhao1, Lu Cai1* 1 School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, China, 2 School of Science, Inner Mongolia University of Science and Technology, Baotou, 014010, China a11111 * [email protected] Abstract Alternative splicing (AS) is pervasive in human multi-exon genes and is a major contributor to expansion of the transcriptome and proteome diversity. The accurate recognition of alter- OPEN ACCESS native splice sites is regulated by information contained in networks of protein-protein and Citation: Xing Y, Zhao X, Yu T, Liang D, Li J, Wei G, protein-RNA interactions. However, the mechanisms leading to splice site selection are not et al. (2016) MiasDB: A Database of Molecular fully understood. Although numerous databases have been built to describe AS, molecular Interactions Associated with Alternative Splicing of Human Pre-mRNAs. PLoS ONE 11(5): e0155443. interaction databases associated with AS have only recently emerged. In this study, we doi:10.1371/journal.pone.0155443 present a new database, MiasDB, that provides a description of molecular interactions Editor: Ruben Artero, University of Valencia, SPAIN associated with human AS events. This database covers 938 interactions between human splicing factors, RNA elements, transcription factors, kinases and modified histones for 173 Received: November 19, 2015 human AS events. Every entry includes the interaction partners, interaction type, experi- Accepted: April 28, 2016 mental methods, AS type, tissue specificity or disease-relevant information, a simple Published: May 11, 2016 description of the functionally tested interaction in the AS event and references. -
Absence of NEFL in Patient-Specific Neurons in Early-Onset Charcot-Marie-Tooth Neuropathy Markus T
ARTICLE OPEN ACCESS Absence of NEFL in patient-specific neurons in early-onset Charcot-Marie-Tooth neuropathy Markus T. Sainio, MSc, Emil Ylikallio, MD, PhD, Laura M¨aenp¨a¨a, MSc, Jenni Lahtela, PhD, Pirkko Mattila, PhD, Correspondence Mari Auranen, MD, PhD, Johanna Palmio, MD, PhD, and Henna Tyynismaa, PhD Dr. Tyynismaa [email protected] Neurol Genet 2018;4:e244. doi:10.1212/NXG.0000000000000244 Abstract Objective We used patient-specific neuronal cultures to characterize the molecular genetic mechanism of recessive nonsense mutations in neurofilament light (NEFL) underlying early-onset Charcot- Marie-Tooth (CMT) disease. Methods Motor neurons were differentiated from induced pluripotent stem cells of a patient with early- onset CMT carrying a novel homozygous nonsense mutation in NEFL. Quantitative PCR, protein analytics, immunocytochemistry, electron microscopy, and single-cell transcriptomics were used to investigate patient and control neurons. Results We show that the recessive nonsense mutation causes a nearly total loss of NEFL messenger RNA (mRNA), leading to the complete absence of NEFL protein in patient’s cultured neurons. Yet the cultured neurons were able to differentiate and form neuronal networks and neuro- filaments. Single-neuron gene expression fingerprinting pinpointed NEFL as the most down- regulated gene in the patient neurons and provided data of intermediate filament transcript abundancy and dynamics in cultured neurons. Blocking of nonsense-mediated decay partially rescued the loss of NEFL mRNA. Conclusions The strict neuronal specificity of neurofilament has hindered the mechanistic studies of re- cessive NEFL nonsense mutations. Here, we show that such mutation leads to the absence of NEFL, causing childhood-onset neuropathy through a loss-of-function mechanism.