Dazl Regulates Mouse Embryonic Germ Cell Development
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Whole-Genome Microarray Detects Deletions and Loss of Heterozygosity of Chromosome 3 Occurring Exclusively in Metastasizing Uveal Melanoma
Anatomy and Pathology Whole-Genome Microarray Detects Deletions and Loss of Heterozygosity of Chromosome 3 Occurring Exclusively in Metastasizing Uveal Melanoma Sarah L. Lake,1 Sarah E. Coupland,1 Azzam F. G. Taktak,2 and Bertil E. Damato3 PURPOSE. To detect deletions and loss of heterozygosity of disease is fatal in 92% of patients within 2 years of diagnosis. chromosome 3 in a rare subset of fatal, disomy 3 uveal mela- Clinical and histopathologic risk factors for UM metastasis noma (UM), undetectable by fluorescence in situ hybridization include large basal tumor diameter (LBD), ciliary body involve- (FISH). ment, epithelioid cytomorphology, extracellular matrix peri- ϩ ETHODS odic acid-Schiff-positive (PAS ) loops, and high mitotic M . Multiplex ligation-dependent probe amplification 3,4 5 (MLPA) with the P027 UM assay was performed on formalin- count. Prescher et al. showed that a nonrandom genetic fixed, paraffin-embedded (FFPE) whole tumor sections from 19 change, monosomy 3, correlates strongly with metastatic death, and the correlation has since been confirmed by several disomy 3 metastasizing UMs. Whole-genome microarray analy- 3,6–10 ses using a single-nucleotide polymorphism microarray (aSNP) groups. Consequently, fluorescence in situ hybridization were performed on frozen tissue samples from four fatal dis- (FISH) detection of chromosome 3 using a centromeric probe omy 3 metastasizing UMs and three disomy 3 tumors with Ͼ5 became routine practice for UM prognostication; however, 5% years’ metastasis-free survival. to 20% of disomy 3 UM patients unexpectedly develop metas- tases.11 Attempts have therefore been made to identify the RESULTS. Two metastasizing UMs that had been classified as minimal region(s) of deletion on chromosome 3.12–15 Despite disomy 3 by FISH analysis of a small tumor sample were found these studies, little progress has been made in defining the key on MLPA analysis to show monosomy 3. -
Focus on Stem Cells Germ Cells from Mouse and Human Embryonic Stem Cells
REPRODUCTIONREVIEW Focus on Stem Cells Germ cells from mouse and human embryonic stem cells Behrouz Aflatoonian and Harry Moore Centre for Stem Cell Biology, University of Sheffield, Sheffield S10 2UH, UK Correspondence should be addressed to H Moore; Email: [email protected] Abstract Mammalian gametes are derived from a founder population of primordial germ cells (PGCs) that are determined early in embryogenesis and set aside for unique development. Understanding the mechanisms of PGC determination and differentiation is important for elucidating causes of infertility and how endocrine disrupting chemicals may potentially increase susceptibility to congenital reproductive abnormalities and conditions such as testicular cancer in adulthood (testicular dysgenesis syndrome). Primordial germ cells are closely related to embryonic stem cells (ESCs) and embryonic germ (EG) cells and comparisons between these cell types are providing new information about pluripotency and epigenetic processes. Murine ESCs can differentiate to PGCs, gametes and even blastocysts – recently live mouse pups were born from sperm generated from mESCs. Although investigations are still preliminary, human embryonic stem cells (hESCs) apparently display a similar developmental capacity to generate PGCs and immature gametes. Exactly how such gamete-like cells are generated during stem cell culture remains unclear especially as in vitro conditions are ill-defined. The findings are discussed in relation to the mechanisms of human PGC and gamete development and the biotechnology of hESCs and hEG cells. Reproduction (2006) 132 699–707 Introduction indicate that human embryonic stem cells (hESCs) most likely display a similar developmental capacity (Clark Detailed investigations of the earliest stages of germ cell et al. -
RNA-Binding Proteins in Human Oogenesis: Balancing Differentiation and Self-Renewal in the Female Fetal Germline
Stem Cell Research 21 (2017) 193–201 Contents lists available at ScienceDirect Stem Cell Research journal homepage: www.elsevier.com/locate/scr RNA-binding proteins in human oogenesis: Balancing differentiation and self-renewal in the female fetal germline Roseanne Rosario a, Andrew J. Childs b, Richard A. Anderson a,⁎ a MRC Centre for Reproductive Health, Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK b Department of Comparative Biomedical Sciences, The Royal Veterinary College, London NW1 0TU, UK article info abstract Article history: Primordial germ cells undergo three significant processes on their path to becoming primary oocytes: the initia- Received 7 October 2016 tion of meiosis, the formation and breakdown of germ cell nests, and the assembly of single oocytes into primor- Received in revised form 29 March 2017 dial follicles. However at the onset of meiosis, the germ cell becomes transcriptionally silenced. Consequently Accepted 13 April 2017 translational control of pre-stored mRNAs plays a central role in coordinating gene expression throughout the re- Available online 18 April 2017 mainder of oogenesis; RNA binding proteins are key to this regulation. In this review we examine the role of ex- Keywords: emplars of such proteins, namely LIN28, DAZL, BOLL and FMRP, and highlight how their roles during germ cell Germ cell differentiation development are critical to oogenesis and the establishment of the primordial follicle pool. RNA binding proteins © 2017 The Authors. -
Insights from Male Germ Cell Differentiation
Cell Death & Differentiation (2021) 28:2296–2299 https://doi.org/10.1038/s41418-021-00812-0 COMMENT Natural selection at the cellular level: insights from male germ cell differentiation 1 1 Daniel H. Nguyen ● Diana J. Laird Received: 9 February 2021 / Revised: 20 May 2021 / Accepted: 20 May 2021 / Published online: 2 June 2021 © The Author(s) 2021. This article is published with open access Waddington’s concept of differentiation as an epigenetic The germline is a fascinating context for investigating landscape provides an enduring metaphor visualizing the the consequences of heterogeneity on differentiation and options faced by stem and progenitor cells. However, cell fate. As fetal germ cells establish the gametes, their increasing understanding of cellular heterogeneity poses population dynamics can greatly influence inheritance. The new questions about the identities and behaviors of the cells conflict between diversity and orderly differentiation looms beginning this process. We now recognize a greater diver- centrally over germline development. In mouse embryos, sity of initial states for individual progenitor cells, which germ cells undertake an epic journey, from specification may affect their trajectories and disrupt progress entirely. through sex differentiation, replete with opportunities for 1234567890();,: 1234567890();,: Here, we consider how developmental selection occurs heterogeneity to develop and be assessed. Notably, an when heterogeneity in differentiating progenitors produces excess of germ cells is produced and then pruned by pro- divergent cellular outcomes of survival versus elimination. grammed cell death [5]. This occurs across diverse species Heterogeneity is a fundamental property of biological regardless of sex, suggesting that differential fitness and systems. Individual cell properties like location or cell cycle elimination are critical. -
Mary Bartlett Bunge 40
EDITORIAL ADVISORY COMMITTEE Marina Bentivoglio Larry F. Cahill Stanley Finger Duane E. Haines Louise H. Marshall Thomas A. Woolsey Larry R. Squire (Chairperson) The History of Neuroscience in Autobiography VOLUME 4 Edited by Larry R. Squire ELSEVIER ACADEMIC PRESS Amsterdam Boston Heidelberg London New York Oxford Paris San Diego San Francisco Singapore Sydney Tokyo This book is printed on acid-free paper. (~ Copyright 9 byThe Society for Neuroscience All Rights Reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Permissions may be sought directly from Elsevier's Science & Technology Rights Department in Oxford, UK: phone: (+44) 1865 843830, fax: (+44) 1865 853333, e-mail: [email protected]. You may also complete your request on-line via the Elsevier homepage (http://elsevier.com), by selecting "Customer Support" and then "Obtaining Permissions." Academic Press An imprint of Elsevier 525 B Street, Suite 1900, San Diego, California 92101-4495, USA http ://www.academicpress.com Academic Press 84 Theobald's Road, London WC 1X 8RR, UK http://www.academicpress.com Library of Congress Catalog Card Number: 2003 111249 International Standard Book Number: 0-12-660246-8 PRINTED IN THE UNITED STATES OF AMERICA 04 05 06 07 08 9 8 7 6 5 4 3 2 1 Contents Per Andersen 2 Mary Bartlett Bunge 40 Jan Bures 74 Jean Pierre G. Changeux 116 William Maxwell (Max) Cowan 144 John E. Dowling 210 Oleh Hornykiewicz 240 Andrew F. -
The Two Faces of Thrombosis: Coagulation Cascade and Platelet Aggregation. Are Platelets the Main Therapeutic Target
Thrombosis and Circulation Open Access Cimmino et al., J Thrombo Cir 2017, 3:1 Review Article Open Access The Two Faces of Thrombosis: Coagulation Cascade and Platelet Aggregation. Are Platelets the Main Therapeutic Target? Giovanni Cimmino*, Salvatore Fischetti and Paolo Golino Department of Cardio-Thoracic and Respiratory Sciences, Section of Cardiology, University of Campania “Luigi Vanvitelli”, Naples, Italy *Corresponding author: Giovanni Cimmino, MD, PhD, Department of Cardio-Thoracic and Respiratory Sciences, Section of Cardiology, University of Campania “Luigi Vanvitelli”, via Leonardo Bianchi, 180131 Naples, Italy. Tel: +39-081-7064175, Fax: +39-081-7064234; E-mail: [email protected] Received date: Dec 28, 2016, Accepted date: Jan 27, 2017, Published date: Jan 31, 2017 Copyright: © 2017 Giovanni C, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Abstract Acute thrombus formation is the pathophysiological substrate underlying several clinical conditions, such as acute coronary syndrome (ACS) and stroke. Activation of coagulation cascade is a key step of the thrombotic process: vessel injury results in exposure of the glycoprotein tissue factor (TF) to the flowing blood. Once exposed, TF binds factor VII/VIIa (FVII/FVIIa) and in presence of calcium ions, it forms a tertiary complex able to activate FX to FXa, FIX to FIXa, and FVIIa itself. The final step is thrombin formation at the site of vessel injury with subsequent platelet activation, fibrinogen to fibrin conversion and ultimately thrombus formation. Platelets are the key cells in primary hemostasis. -
A Role for Dazl in Commitment to Gametogenic Fate in Embryonic Germ Cells of C57BL/6 Mice
A Role for Dazl in Commitment to Gametogenic Fate in Embryonic Germ Cells of C57BL/6 Mice by Yanfeng Lin (Yen-Hong Lim) B.S. Biochemistry and Molecular and Cell Biology University of Wisconsin-Madison, 1998 SUBMITTED TO THE DEPARTMENT OF BIOLOGY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN BIOLOGY AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY SEPT 2005 C 2005 Yanfeng Lin. All rights reserved. The author hereby grants to MIT permission to reproduce and distribute publicly paper and electronic copies of this thesis document in whole or in part. Signature of Author __ _ __ Department of Biology August, 2005 V /-' ~J-2 Certified by David C. Page Professor of Biology Howard Hughes Medical Institute Thesis Supervisor Accepted b) Stephen P. Bell Co-chair, Biology Graduate Student Committee 'MACHUS ETT S NS1 I OF TECHNOLOGY ARCHIVES' OCT 0 2005 . ,. -~ I LIBRARIES .i. __ A Role for Dazl in Commitment to Gametogenic Fate in Embryonic Germ Cells of C57BL/6 Mice by Yanfeng Lin (Yen-Hong Lim) Submitted to the Department of Biology on June, 2005 in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Biology Abstract Germ cells can be defined as the cells that undergo the terminal differentiating process of meiosis. In mice, as XX germ cells enter meiosis around Embryonic days 13.5-14.5 (E13.5-E14.5), they form meiotic figures and down-regulate pluripotency markers. XY germ cells enter proliferation arrest between E13.5 and E16.5, which is accompanied by a distinct morphological change as well. -
Diagnostic Methods in Hematology II
DiagnosticDiagnostic methodsmethods inin hematologyhematology IIII Jan Zivny Department of Pathophysiology 1. LF UK OutlineOutline Specialized hematology tests • Evaluation of anemia – Anemia basics • Anemia caused by excessive erythrocyte loss • Anemia caused by deficient erythropoiesis • Diagnostic methods used in leukemia/lymphoma ANEMIAANEMIA • WHO criteria: Hb < 125 g/L in adults • US criteria: –M: Hb < 135 g/L –F: Hb < 125 g/L •• AnemiaAnemia isis clinicalclinical signsign CausesCauses ofof anemiaanemia • Insufficient RBC production – deficient erythropoiesis • Excessive RBC loss – Hemolysis (shortened lifespan of erythrocytes) – Acute bleeding (chronic bleeding leads to iron depletion and results in iron loss and deficient erythropoiesis) AnemiaAnemia causedcaused byby deficientdeficient erythropoiesiserythropoiesis Causes of insufficient erythropoiesis? AnemiaAnemia causedcaused byby deficientdeficient erythropoiesiserythropoiesis • Iron metabolism related (microcytic) – Iron deficiency – Chronic diseases • Vitamin B12 or folate deficiency (macrocytic) • Insuficient EPO production and marrow failure (normocytic) – kidney failure – aplastic anemia – myelodysplasia – leukemia DiagnosticDiagnostic aproachesaproaches toto ironiron metabolismmetabolism relatedrelated anemiaanemia IronIron deficiencydeficiency ChronicChronic diseasesdiseases IronIron deficiencydeficiency • microcytic anemia and/or anisocytosis • ↓ blood reticulocytes • hypoproliferative BM • Blood loss in excess of 10 to 20 mL of blood per day (> 5-10 mg of iron) or -
Intrinsic Factor
ENZYMES INTRINSIC FACTOR EINECS Number 232-711-9 Alternative Names Vitamin B12-binding protein, Factor VII, Intrinsic Factor protein Assay Principle Intrinsic Factor binds specifically to Vitamin B12. The coating of a Vitamin B12-BSA (IF Content) conjugate to the ELISA plate allows for the extent of Intrinsic Factor binding to be investigated. A Mouse monoclonal Anti-Intrinsic Factor antibody is used to identify the concentration of Intrinsic Factor bound to the Vitamin B12. The Antibody bound to the Intrinsic Factor on the plate is identified by use of an Anti Mouse AP conjugate. PNPP substrate is used to develop signals, read at an absorbance of 405nm on a plate reader. What is pernicious anaemia? Key Benefits Intrinsic Factor is primarily used in the diagnosis of pernicious anaemia, a condition caused by a vitamin B12 deficiency. Prevalence in the general + SUPPLY SECURITY population varies from around 3% - 5%, and increases dramatically to Fully manufactured by BBI 5% - 20% among people older than 65 years. Solutions at our Crumlin site, ensuring control over manufacturing processes and supply chain + HIGH PURITY Intrinsic Factor has a purity of >95% ensuring optimal performance in your assay + PROVEN PERFORMANCE Porcine Intrinsic Factor works in a range of immunoassay formats The role of Intrinsic Factor in diagnosis + HIGH QUALITY Intrinsic Factor has a high affinity and specificity to vitamin B12, which Manufactured under a makes it ideal for use in immunoassays. Most commercial assays utilise Quality System compliant a competitive binding technique generating a chemiluminescent signal. with ISO 13485:2016 with Commercial assays can usually detect to a level of ~50 pg/ml vitamin B12. -
Expression of DAZL Gene in Selected Tissues and Association of Its Polymorphisms with Testicular Size in Hu Sheep
animals Article Expression of DAZL Gene in Selected Tissues and Association of Its Polymorphisms with Testicular Size in Hu Sheep 1, 1, 1 1,2 1 1, Zehu Yuan y, Jing Luo y, Li Wang , Fadi Li , Wanhong Li and Xiangpeng Yue * 1 State Key Laboratory of Grassland Agro-Ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China; [email protected] (Z.Y.); [email protected] (J.L.); [email protected] (L.W.); [email protected] (F.L.); [email protected] (W.L.) 2 Engineering Laboratory of Sheep Breeding and Reproduction Biotechnology in Gansu Province, Minqin 733300, China * Correspondence: [email protected] These authors contributed equally to this work. y Received: 9 March 2020; Accepted: 20 April 2020; Published: 23 April 2020 Simple Summary: The deleted in azoospermia-like (DAZL) is an RNA binding protein coding gene in autosomal, playing important roles in testicular development and gametogenesis. In this paper, we found that DAZL is extremely highly expressed in testis compared with other organs and reaches to a peak at sex maturity (6-month old) in testis. Two single nucleotide polymorphisms (SNPs) within DAZL were found to have significant effect on the variation coefficient between left and right epididymis weight. Abstract: The deleted in azoospermia-like (DAZL) gene encoding an RNA binding protein is pivotal in gametogenesis in lots of species and also acts as a pre-meiosis marker. -
In Vitro Modelling of the Mucosa of the Oesophagus and Upper Digestive Tract
21 Review Article Page 1 of 21 In vitro modelling of the mucosa of the oesophagus and upper digestive tract Kyle Stanforth1, Peter Chater1, Iain Brownlee2, Matthew Wilcox1, Chris Ward1, Jeffrey Pearson1 1NUBI, Newcastle University, Newcastle upon Tyne, UK; 2Applied Sciences (Department), Northumbria University, Newcastle upon Tyne, UK Contributions: (I) Conception and design: All Authors; (II) Administrative support: All Authors; (III) Provision of study materials or patients: All Authors; (IV) Collection and assembly of data: All Authors; (V) Data analysis and interpretation: All Authors; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Kyle Stanforth. NUBI, Medical School, Framlington Place, Newcastle University, NE2 4HH, Newcastle upon Tyne, UK. Email: [email protected]. Abstract: This review discusses the utility and limitations of model gut systems in accurately modelling the mucosa of the digestive tract from both an anatomical and functional perspective, with a particular focus on the oesophagus and the upper digestive tract, and what this means for effective in vitro modelling of oesophageal pathology. Disorders of the oesophagus include heartburn, dysphagia, eosinophilic oesophagitis, achalasia, oesophageal spasm and gastroesophageal reflux disease. 3D in vitro models of the oesophagus, such as organotypic 3D culture and spheroid culture, have been shown to be effective tools for investigating oesophageal pathology. However, these models are not integrated with modelling of the upper digestive tract—presenting an opportunity for future development. Reflux of upper gastrointestinal contents is a major contributor to oesophageal pathologies like gastroesophageal reflux disease and Barratt’s oesophagus, and in vitro models are essential for understanding their mechanisms and developing solutions. -
Germ-Line Immortality
COMMENTARY Germ-line immortality Martin M. Matzuk* Departments of Pathology, Molecular and Cellular Biology, and Molecular and Human Genetics, and Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030 ajor advances in stem cell Table 1. Pathway of differentiation in males research have occurred over Spermatogonial Differentiated the last decades. Progress Markers ES cells ¡ PGCs ¡ Gonocytes ¡ stem cells ¡ spermatogonia has included the generation Mof lines of human and mouse embryonic Kit ϩϩϩ͞– – (low) ϩ ϩ ϩϩ stem (ES) cells and the identification and Thy-1 ? (low) – Oct4 ϩϩ ϩ ϩ – purification of stem cells for multiple Plzf ϩ (low)* ϩ* ϩϩ – independent lineages. Recent studies by GCNA1 – ϩ† ϩϩ ϩ Brinster and colleagues in this issue of TNAP ϩ (high) ϩ (high) – ϩ (low)͞–– PNAS (1) also suggest that the reproduc- RET ϩ (low)* ? ? ϩ – ␣ ϩ ϩ tive potential of an organism can be pro- GFR 1 (low)* ? ? (low) – NCAM ϩ ? ϩϩ ? longed indefinitely by using germ-line stem cells. It even appears that eggs and Markers that are known to be expressed (ϩ) or absent (–) in many of the pathway cells are listed. GCNA1, sperm can develop from cultured mouse germ cell nuclear antigen 1; TNAP, tissue-nonspecific alkaline phosphatase; NCAM, neural cell adhesion ES cells (2–4). Although gametes derived molecule. in vitro have yet to prove their develop- *mRNA levels. † mental potential, these studies suggest Postmigratory PGCs only. that ES cells and germ-line stem cells share many characteristics. ent males. The process was surprisingly KitϪ Sca-IϪ ␣6-integrinϩ ␣v-integrinϪ/dim In most mammalian females, meiosis efficient, with up to 100% of the injected (9, 10).