1
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Namoto K, Baader C, Orsini V, Landshammer A, Breuer E, Dinh KT, Ungricht R, Pikiolek M, Laurent S, Lu B, Aebi A, Schönberger K, Vangrevelinghe E, Evrova O, Sun T, Annunziato S, Lachal J, Redmond E, Wang L, Wetzel K, Capodieci P, Turner J, Schutzius G, Unterreiner V, Trunzer M, Buschmann N, Behnke D, Machauer R, Scheufler C, Parker CN, Ferro M, Grevot A, Beyerbach A, Lu WY, Forbes SJ, Wagner J, Bouwmeester T, Liu J, Sohal B, Sahambi S, Greenbaum LE, Lohmann F, Hoppe P, Cong F, Sailer AW, Ruffner H, Glatthar R, Humar B, Clavien PA, Dill MT, George E, Maibaum J, Liberali P, Tchorz JS. NIBR-LTSi is a selective LATS kinase inhibitor activating YAP signaling and expanding tissue stem cells in vitro and in vivo. Cell Stem Cell 2024; 31:554-569.e17. [PMID: 38579685 DOI: 10.1016/j.stem.2024.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 01/24/2024] [Accepted: 03/06/2024] [Indexed: 04/07/2024]
Abstract
The YAP/Hippo pathway is an organ growth and size regulation rheostat safeguarding multiple tissue stem cell compartments. LATS kinases phosphorylate and thereby inactivate YAP, thus representing a potential direct drug target for promoting tissue regeneration. Here, we report the identification and characterization of the selective small-molecule LATS kinase inhibitor NIBR-LTSi. NIBR-LTSi activates YAP signaling, shows good oral bioavailability, and expands organoids derived from several mouse and human tissues. In tissue stem cells, NIBR-LTSi promotes proliferation, maintains stemness, and blocks differentiation in vitro and in vivo. NIBR-LTSi accelerates liver regeneration following extended hepatectomy in mice. However, increased proliferation and cell dedifferentiation in multiple organs prevent prolonged systemic LATS inhibition, thus limiting potential therapeutic benefit. Together, we report a selective LATS kinase inhibitor agonizing YAP signaling and promoting tissue regeneration in vitro and in vivo, enabling future research on the regenerative potential of the YAP/Hippo pathway.
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Affiliation(s)
- Kenji Namoto
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland.
| | - Clara Baader
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland; University of Basel, Basel, Switzerland
| | - Vanessa Orsini
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | - Eva Breuer
- University Hospital Zurich (USZ), Zurich, Switzerland
| | - Kieu Trinh Dinh
- German Cancer Research Center (DKFZ) Heidelberg, Research Group Experimental Hepatology, Inflammation and Cancer, Heidelberg, Germany; Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | | | | | | | - Bo Lu
- Biomedical Research, Novartis Pharma AG, Cambridge, MA, USA
| | - Alexandra Aebi
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | | | - Olivera Evrova
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Tianliang Sun
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland; Division of Liver Diseases, Institute for Regenerative Medicine, Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Julie Lachal
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Emily Redmond
- Biomedical Research, Novartis Pharma AG, Cambridge, MA, USA
| | - Louis Wang
- Biomedical Research, Novartis Pharma AG, Cambridge, MA, USA
| | - Kristie Wetzel
- Biomedical Research, Novartis Pharma AG, Cambridge, MA, USA
| | | | | | - Gabi Schutzius
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | - Markus Trunzer
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | - Dirk Behnke
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | | | | | - Magali Ferro
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Armelle Grevot
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | - Wei-Yu Lu
- University of Edinburgh, Center for Inflammation Research, Edinburgh, UK
| | - Stuart J Forbes
- University of Edinburgh, Center for Regenerative Medicine, Edinburgh, UK
| | - Jürgen Wagner
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | - Jun Liu
- Biomedical Research, Novartis Pharma AG, La Jolla, CA, USA
| | - Bindi Sohal
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | | | - Felix Lohmann
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Philipp Hoppe
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Feng Cong
- Biomedical Research, Novartis Pharma AG, Cambridge, MA, USA
| | | | - Heinz Ruffner
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Ralf Glatthar
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Bostjan Humar
- University Hospital Zurich (USZ), Zurich, Switzerland
| | | | - Michael T Dill
- German Cancer Research Center (DKFZ) Heidelberg, Research Group Experimental Hepatology, Inflammation and Cancer, Heidelberg, Germany; Department of Gastroenterology, Infectious Diseases and Intoxication, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Jürgen Maibaum
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland
| | - Prisca Liberali
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland; University of Basel, Basel, Switzerland
| | - Jan S Tchorz
- Biomedical Research, Novartis Pharma AG, Basel, Switzerland.
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2
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Glaser KM, Egg M, Hobitz S, Mitterer M, Schain-Zota D, Schönberger K, Schuldes K, Cabezas-Wallscheid N, Lämmermann T, Rambold A, Buescher JM. Targeted Metabolomics on Rare Primary Cells. J Vis Exp 2024. [PMID: 38465941 DOI: 10.3791/65690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024] Open
Abstract
Cellular function critically depends on metabolism, and the function of the underlying metabolic networks can be studied by measuring small molecule intermediates. However, obtaining accurate and reliable measurements of cellular metabolism, particularly in rare cell types like hematopoietic stem cells, has traditionally required pooling cells from multiple animals. A protocol now enables researchers to measure metabolites in rare cell types using only one mouse per sample while generating multiple replicates for more abundant cell types. This reduces the number of animals that are required for a given project. The protocol presented here involves several key differences over traditional metabolomics protocols, such as using 5 g/L NaCl as a sheath fluid, sorting directly into acetonitrile, and utilizing targeted quantification with rigorous use of internal standards, allowing for more accurate and comprehensive measurements of cellular metabolism. Despite the time required for the isolation of single cells, fluorescent staining, and sorting, the protocol can preserve differences among cell types and drug treatments to a large extent.
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Affiliation(s)
| | - Mirijam Egg
- Max Planck Institute of Immunobiology and Epigenetics
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3
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Zhang YW, Velasco-Hernandez T, Mess J, Lalioti ME, Romero-Mulero MC, Obier N, Karantzelis N, Rettkowski J, Schönberger K, Karabacz N, Jäcklein K, Morishima T, Trincado JL, Romecin P, Martinez A, Takizawa H, Shoumariyeh K, Renders S, Zeiser R, Pahl HL, Béliveau F, Hébert J, Lehnertz B, Sauvageau G, Menendez P, Cabezas-Wallscheid N. GPRC5C drives branched-chain amino acid metabolism in leukemogenesis. Blood Adv 2023; 7:7525-7538. [PMID: 37639313 PMCID: PMC10761356 DOI: 10.1182/bloodadvances.2023010460] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 08/01/2023] [Accepted: 08/13/2023] [Indexed: 08/29/2023] Open
Abstract
Leukemia stem cells (LSCs) share numerous features with healthy hematopoietic stem cells (HSCs). G-protein coupled receptor family C group 5 member C (GPRC5C) is a regulator of HSC dormancy. However, GPRC5C functionality in acute myeloid leukemia (AML) is yet to be determined. Within patient AML cohorts, high GPRC5C levels correlated with poorer survival. Ectopic Gprc5c expression increased AML aggression through the activation of NF-κB, which resulted in an altered metabolic state with increased levels of intracellular branched-chain amino acids (BCAAs). This onco-metabolic profile was reversed upon loss of Gprc5c, which also abrogated the leukemia-initiating potential. Targeting the BCAA transporter SLC7A5 with JPH203 inhibited oxidative phosphorylation and elicited strong antileukemia effects, specifically in mouse and patient AML samples while sparing healthy bone marrow cells. This antileukemia effect was strengthened in the presence of venetoclax and azacitidine. Our results indicate that the GPRC5C-NF-κB-SLC7A5-BCAAs axis is a therapeutic target that can compromise leukemia stem cell function in AML.
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Affiliation(s)
- Yu Wei Zhang
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Talia Velasco-Hernandez
- Department of Biomedicine, Josep Carreras Leukaemia Research Institute, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Julian Mess
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Spemann Graduate School for Biology and Medicine, University of Freiburg, Freiburg, Germany
- Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | | | - Mari Carmen Romero-Mulero
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Nadine Obier
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Nikolaos Karantzelis
- Department of Hematology, Oncology and Stem Cell Transplantation, University Medical Center Freiburg, Freiburg, Germany
| | - Jasmin Rettkowski
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Spemann Graduate School for Biology and Medicine, University of Freiburg, Freiburg, Germany
- Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | | | - Noémie Karabacz
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Karin Jäcklein
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Tatsuya Morishima
- Laboratory of Stem Cell Stress, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
- Laboratory of Hematopoietic Stem Cell Engineering, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Juan Luis Trincado
- Department of Biomedicine, Josep Carreras Leukaemia Research Institute, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Paola Romecin
- Department of Biomedicine, Josep Carreras Leukaemia Research Institute, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Alba Martinez
- Department of Biomedicine, Josep Carreras Leukaemia Research Institute, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Hitoshi Takizawa
- Laboratory of Stem Cell Stress, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
- Laboratory of Hematopoietic Stem Cell Engineering, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Khalid Shoumariyeh
- Department of Medicine I, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- German Cancer Consortium, Partner Site Freiburg, and German Cancer Research Center, Heidelberg, Germany
| | - Simon Renders
- Department of Internal Medicine V, Heidelberg University Hospital, Heidelberg, Germany
| | - Robert Zeiser
- Department of Medicine I, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Heike L. Pahl
- Department of Hematology, Oncology and Stem Cell Transplantation, University Medical Center Freiburg, Freiburg, Germany
| | - François Béliveau
- Quebec leukemia cell bank, Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
| | - Josée Hébert
- Quebec leukemia cell bank, Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Division of Hematology and Oncology, Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada
- Department of Medicine, Faculty of Medicine, Université de Montréal, Montréal, QC, Canada
| | - Bernhard Lehnertz
- Institute for Research in Immunology and Cancer, University of Montreal, Montreal, Canada
| | - Guy Sauvageau
- Institute for Research in Immunology and Cancer, University of Montreal, Montreal, Canada
| | - Pablo Menendez
- Department of Biomedicine, Josep Carreras Leukaemia Research Institute, School of Medicine, University of Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer, ISIII, Barcelona, Spain
- RICORS-TERAV Network, ISCIII, Madrid, Spain
- Instituciò Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - Nina Cabezas-Wallscheid
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
- Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
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4
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Zhang YW, Schönberger K, Cabezas‐Wallscheid N. Bidirectional interplay between metabolism and epigenetics in hematopoietic stem cells and leukemia. EMBO J 2023; 42:e112348. [PMID: 38010205 PMCID: PMC10711668 DOI: 10.15252/embj.2022112348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 08/24/2023] [Accepted: 08/28/2023] [Indexed: 11/29/2023] Open
Abstract
During the last decades, remarkable progress has been made in further understanding the complex molecular regulatory networks that maintain hematopoietic stem cell (HSC) function. Cellular and organismal metabolisms have been shown to directly instruct epigenetic alterations, and thereby dictate stem cell fate, in the bone marrow. Epigenetic regulatory enzymes are dependent on the availability of metabolites to facilitate DNA- and histone-modifying reactions. The metabolic and epigenetic features of HSCs and their downstream progenitors can be significantly altered by environmental perturbations, dietary habits, and hematological diseases. Therefore, understanding metabolic and epigenetic mechanisms that regulate healthy HSCs can contribute to the discovery of novel metabolic therapeutic targets that specifically eliminate leukemia stem cells while sparing healthy HSCs. Here, we provide an in-depth review of the metabolic and epigenetic interplay regulating hematopoietic stem cell fate. We discuss the influence of metabolic stress stimuli, as well as alterations occurring during leukemic development. Additionally, we highlight recent therapeutic advancements toward eradicating acute myeloid leukemia cells by intervening in metabolic and epigenetic pathways.
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Affiliation(s)
- Yu Wei Zhang
- Max Planck Institute of Immunobiology and EpigeneticsFreiburgGermany
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5
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Schönberger K, Cabezas-Wallscheid N. How nutrition regulates hematopoietic stem cell features. Exp Hematol 2023; 128:10-18. [PMID: 37816445 DOI: 10.1016/j.exphem.2023.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 10/12/2023]
Abstract
Our dietary choices significantly impact all the cells in our body. Increasing evidence suggests that diet-derived metabolites influence hematopoietic stem cell (HSC) metabolism and function, thereby actively modulating blood homeostasis. This is of particular relevance because regulating the metabolic activity of HSCs is crucial for maintaining stem cell fitness and mitigating the risk of hematologic disorders. In this review, we examine the current scientific knowledge of the impact of diet on stemness features, and we specifically highlight the established mechanisms by which dietary components modulate metabolic and transcriptional programs in adult HSCs. Gaining a deeper understanding of how nutrition influences our HSC compartment may pave the way for targeted dietary interventions with the potential to decelerate aging and improve the effectiveness of transplantation and cancer therapies.
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6
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Chen F, Schönberger K, Tchorz JS. Distinct hepatocyte identities in liver homeostasis and regeneration. JHEP Rep 2023; 5:100779. [PMID: 37456678 PMCID: PMC10339260 DOI: 10.1016/j.jhepr.2023.100779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 03/27/2023] [Accepted: 04/07/2023] [Indexed: 07/18/2023] Open
Abstract
The process of metabolic liver zonation is spontaneously established by assigning distributed tasks to hepatocytes along the porto-central blood flow. Hepatocytes fulfil critical metabolic functions, while also maintaining hepatocyte mass by replication when needed. Recent technological advances have enabled us to fine-tune our understanding of hepatocyte identity during homeostasis and regeneration. Subsets of hepatocytes have been identified to be more regenerative and some have even been proposed to function like stem cells, challenging the long-standing view that all hepatocytes are similarly capable of regeneration. The latest data show that hepatocyte renewal during homeostasis and regeneration after liver injury is not limited to rare hepatocytes; however, hepatocytes are not exactly the same. Herein, we review the known differences that give individual hepatocytes distinct identities, recent findings demonstrating how these distinct identities correspond to differences in hepatocyte regenerative capacity, and how the plasticity of hepatocyte identity allows for division of labour among hepatocytes. We further discuss how these distinct hepatocyte identities may play a role during liver disease.
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Affiliation(s)
- Feng Chen
- Novartis Institutes for BioMedical Research, Cambridge, MA, United States
| | | | - Jan S. Tchorz
- Novartis Institutes for BioMedical Research, Basel, Switzerland
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7
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Schönberger K, Tchorz JS. Hepatic stellate cells: From bad reputation to mediators of liver homeostasis. Sci Signal 2023; 16:eadh5460. [PMID: 37253088 DOI: 10.1126/scisignal.adh5460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Organ size and function critically depend on the tight regulation of cellular turnover. In this issue of Science Signaling, Trinh et al. reveal that hepatic stellate cells play an important role in maintaining liver homeostasis by stimulating midzonal hepatocyte proliferation through the secretion of neurotrophin-3.
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Affiliation(s)
| | - Jan S Tchorz
- Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
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8
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Schönberger K, Mitterer M, Glaser K, Stecher M, Hobitz S, Schain-Zota D, Schuldes K, Lämmermann T, Rambold AS, Cabezas-Wallscheid N, Buescher JM. LC-MS-Based Targeted Metabolomics for FACS-Purified Rare Cells. Anal Chem 2023; 95:4325-4334. [PMID: 36812587 PMCID: PMC9996616 DOI: 10.1021/acs.analchem.2c04396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Metabolism plays a fundamental role in regulating cellular functions and fate decisions. Liquid chromatography-mass spectrometry (LC-MS)-based targeted metabolomic approaches provide high-resolution insights into the metabolic state of a cell. However, the typical sample size is in the order of 105-107 cells and thus not compatible with rare cell populations, especially in the case of a prior flow cytometry-based purification step. Here, we present a comprehensively optimized protocol for targeted metabolomics on rare cell types, such as hematopoietic stem cells and mast cells. Only 5000 cells per sample are required to detect up to 80 metabolites above background. The use of regular-flow liquid chromatography allows for robust data acquisition, and the omission of drying or chemical derivatization avoids potential sources of error. Cell-type-specific differences are preserved while the addition of internal standards, generation of relevant background control samples, and targeted metabolite with quantifiers and qualifiers ensure high data quality. This protocol could help numerous studies to gain thorough insights into cellular metabolic profiles and simultaneously reduce the number of laboratory animals and the time-consuming and costly experiments associated with rare cell-type purification.
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Affiliation(s)
- Katharina Schönberger
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany.,International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-IEM), 79108 Freiburg, Germany.,Faculty of Biology, University of Freiburg, 79085 Freiburg, Germany
| | - Michael Mitterer
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Katharina Glaser
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany.,International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-IEM), 79108 Freiburg, Germany.,Faculty of Biology, University of Freiburg, 79085 Freiburg, Germany
| | - Manuel Stecher
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany.,Faculty of Biology, University of Freiburg, 79085 Freiburg, Germany.,International Max Planck Research School for Immunobiology, Epigenetics and Metabolism (IMPRS-MCB), 79108 Freiburg, Germany
| | - Sebastian Hobitz
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Dominik Schain-Zota
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Konrad Schuldes
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Tim Lämmermann
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Angelika S Rambold
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | | | - Joerg M Buescher
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
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9
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Zhang YW, Mess J, Aizarani N, Mishra P, Johnson C, Romero-Mulero MC, Rettkowski J, Schönberger K, Obier N, Jäcklein K, Woessner NM, Lalioti ME, Velasco-Hernandez T, Sikora K, Wäsch R, Lehnertz B, Sauvageau G, Manke T, Menendez P, Walter SG, Minguet S, Laurenti E, Günther S, Grün D, Cabezas-Wallscheid N. Hyaluronic acid-GPRC5C signalling promotes dormancy in haematopoietic stem cells. Nat Cell Biol 2022; 24:1038-1048. [PMID: 35725769 PMCID: PMC9276531 DOI: 10.1038/s41556-022-00931-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 05/02/2022] [Indexed: 12/11/2022]
Abstract
Bone marrow haematopoietic stem cells (HSCs) are vital for lifelong maintenance of healthy haematopoiesis. In inbred mice housed in gnotobiotic facilities, the top of the haematopoietic hierarchy is occupied by dormant HSCs, which reversibly exit quiescence during stress. Whether HSC dormancy exists in humans remains debatable. Here, using single-cell RNA sequencing, we show a continuous landscape of highly purified human bone marrow HSCs displaying varying degrees of dormancy. We identify the orphan receptor GPRC5C, which enriches for dormant human HSCs. GPRC5C is also essential for HSC function, as demonstrated by genetic loss- and gain-of-function analyses. Through structural modelling and biochemical assays, we show that hyaluronic acid, a bone marrow extracellular matrix component, preserves dormancy through GPRC5C. We identify the hyaluronic acid-GPRC5C signalling axis controlling the state of dormancy in mouse and human HSCs.
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Affiliation(s)
- Yu Wei Zhang
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany.,International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany
| | - Julian Mess
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany.,Spemann Graduate School for Biology and Medicine (SGBM), Freiburg, Germany.,Centre for Integrative Biological Signalling Studies (CIBSS), Freiburg, Germany
| | - Nadim Aizarani
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany.,International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany
| | - Pankaj Mishra
- Pharmaceutical Bioinformatics, University of Freiburg, Freiburg, Germany
| | - Carys Johnson
- Department of Haematology and Wellcome and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Mari Carmen Romero-Mulero
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Jasmin Rettkowski
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany.,Spemann Graduate School for Biology and Medicine (SGBM), Freiburg, Germany
| | - Katharina Schönberger
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany.,International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany
| | - Nadine Obier
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Karin Jäcklein
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Nadine M Woessner
- Faculty of Biology, University of Freiburg, Freiburg, Germany.,Spemann Graduate School for Biology and Medicine (SGBM), Freiburg, Germany.,Centre for Integrative Biological Signalling Studies (CIBSS), Freiburg, Germany.,Signalling Research Center BIOSS, Freiburg, Germany
| | | | - Talia Velasco-Hernandez
- Josep Carreras Leukemia Research Institute-Campus Clinic and Department of Biomedicine, School of Medicine, University of Barcelona, Barcelona, Spain
| | - Katarzyna Sikora
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Ralph Wäsch
- Department of Hematology, Oncology and Stem Cell Transplantation, Faculty of Medical, University of Freiburg, Freiburg, Germany
| | - Bernhard Lehnertz
- Institute for Research in Immunology and Cancer, University of Montreal, Montreal, Canada
| | - Guy Sauvageau
- Institute for Research in Immunology and Cancer, University of Montreal, Montreal, Canada
| | - Thomas Manke
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
| | - Pablo Menendez
- Signalling Research Center BIOSS, Freiburg, Germany.,Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain.,Spanish Network for Cancer Research (CIBER-ONC)-ISCIII, Barcelona, Spain
| | | | - Susana Minguet
- Faculty of Biology, University of Freiburg, Freiburg, Germany.,Centre for Integrative Biological Signalling Studies (CIBSS), Freiburg, Germany.,Signalling Research Center BIOSS, Freiburg, Germany
| | - Elisa Laurenti
- Department of Haematology and Wellcome and MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Stefan Günther
- Pharmaceutical Bioinformatics, University of Freiburg, Freiburg, Germany
| | - Dominic Grün
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.,Centre for Integrative Biological Signalling Studies (CIBSS), Freiburg, Germany.,Würzburg Institute of Systems Immunology, Max Planck Research Group at the Julius-Maximilians-Universität, Würzburg, Germany.,Helmholtz Institute for RNA-based Infection Research (HIRI), Helmholtz Centre for Infection Research (HZI), Würzburg, Germany
| | - Nina Cabezas-Wallscheid
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany. .,Centre for Integrative Biological Signalling Studies (CIBSS), Freiburg, Germany.
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10
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Spohr C, Poggio T, Andrieux G, Schönberger K, Cabezas-Wallscheid N, Börries M, Halbach S, Illert AL, Brummer T. Abstract 945: Gab2 deficiency protects against Flt3-ITD driven acute myeloid leukemia in vivo. Cancer Res 2022. [DOI: 10.1158/1538-7445.am2022-945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Internal tandem duplications (ITD) of the FMS-like tyrosine kinase 3 (FLT3) frequently co-exist with inactivating DNMT3A mutations and predict poor prognosis in acute myeloid leukemia (AML). In vitro studies implicated the docking protein Grb2-associated binder 2 (GAB2) as FLT3-ITD effector. By utilizing a Flt3-ITD knock-in, Dnmt3a haploinsufficient mouse model, we demonstrate that Gab2 is essential for the development of Flt3-ITD driven AML in vivo, as Gab2 deficient mice survived significantly longer, had reduced blast counts and exhibited an attenuated spleen and liver pathology as compared to their Gab2-proficient littermates. Further, leukemic bone marrow isolated from Gab2 deficient mice displayed a reduced colony forming unit capacity and an increased sensitivity towards the Flt3 inhibitor quizartinib. Using RNA sequencing, we identify the genes encoding for Axl and the Ret co-receptor Gfra2 as targets of the Flt3-ITD/Gab2/Stat5 axis. We propose a pathomechanism in which Gab2 increases signaling of these receptors as it induces their expression and additionally serves as a downstream effector. Consequently, Gab2 promotes AML aggressiveness as well as drug resistance by incorporating the receptor tyrosine kinases Axl and Ret into the Flt3-ITD signaling network. Therefore, our data identify GAB2 as a promising biomarker as well as a therapeutic target in human AML.
Citation Format: Corinna Spohr, Teresa Poggio, Geoffroy Andrieux, Katharina Schönberger, Nina Cabezas-Wallscheid, Melanie Börries, Sebastian Halbach, Anna L. Illert, Tilman Brummer. Gab2 deficiency protects against Flt3-ITD driven acute myeloid leukemia in vivo [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 945.
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11
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Schönberger K, Mitterer M, Buescher JM, Cabezas-Wallscheid N. Targeted LC-MS/MS-based metabolomics and lipidomics on limited hematopoietic stem cell numbers. STAR Protoc 2022; 3:101408. [PMID: 35620073 PMCID: PMC9127697 DOI: 10.1016/j.xpro.2022.101408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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12
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Schönberger K, Obier N, Romero-Mulero MC, Cauchy P, Mess J, Pavlovich PV, Zhang YW, Mitterer M, Rettkowski J, Lalioti ME, Jäcklein K, Curtis JD, Féret B, Sommerkamp P, Morganti C, Ito K, Ghyselinck NB, Trompouki E, Buescher JM, Pearce EL, Cabezas-Wallscheid N. Multilayer omics analysis reveals a non-classical retinoic acid signaling axis that regulates hematopoietic stem cell identity. Cell Stem Cell 2022; 29:131-148.e10. [PMID: 34706256 PMCID: PMC9093043 DOI: 10.1016/j.stem.2021.10.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 08/05/2021] [Accepted: 10/06/2021] [Indexed: 02/08/2023]
Abstract
Hematopoietic stem cells (HSCs) rely on complex regulatory networks to preserve stemness. Due to the scarcity of HSCs, technical challenges have limited our insights into the interplay between metabolites, transcription, and the epigenome. In this study, we generated low-input metabolomics, transcriptomics, chromatin accessibility, and chromatin immunoprecipitation data, revealing distinct metabolic hubs that are enriched in HSCs and their downstream multipotent progenitors. Mechanistically, we uncover a non-classical retinoic acid (RA) signaling axis that regulates HSC function. We show that HSCs rely on Cyp26b1, an enzyme conventionally considered to limit RA effects in the cell. In contrast to the traditional view, we demonstrate that Cyp26b1 is indispensable for production of the active metabolite 4-oxo-RA. Further, RA receptor beta (Rarb) is required for complete transmission of 4-oxo-RA-mediated signaling to maintain stem cells. Our findings emphasize that a single metabolite controls stem cell fate by instructing epigenetic and transcriptional attributes.
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Affiliation(s)
- Katharina Schönberger
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany; International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany
| | - Nadine Obier
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | | | - Pierre Cauchy
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | - Julian Mess
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany; Spemann Graduate School of Biology and Medicine (SGBM), Freiburg, Germany; Centre for Integrative Biological Signalling Studies (CIBSS), Freiburg, Germany
| | - Polina V Pavlovich
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany; International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany
| | - Yu Wei Zhang
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany; International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany
| | - Michael Mitterer
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | - Jasmin Rettkowski
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany; Spemann Graduate School of Biology and Medicine (SGBM), Freiburg, Germany
| | - Maria-Eleni Lalioti
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | - Karin Jäcklein
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | - Jonathan D Curtis
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | - Betty Féret
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), UMR 7104 Centre National de la Recherche Scientifique (CNRS) et Université de Strasbourg (UNISTRA), U1258 Institut National de la Santé et de la Recherche Médicale (INSERM), Illkirch, France
| | - Pia Sommerkamp
- German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Claudia Morganti
- Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Departments of Cell Biology and Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Keisuke Ito
- Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Departments of Cell Biology and Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Norbert B Ghyselinck
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), UMR 7104 Centre National de la Recherche Scientifique (CNRS) et Université de Strasbourg (UNISTRA), U1258 Institut National de la Santé et de la Recherche Médicale (INSERM), Illkirch, France
| | - Eirini Trompouki
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | - Joerg M Buescher
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany
| | - Erika L Pearce
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; The Bloomberg-Kimmel Institute for Cancer Immunotherapy at Johns Hopkins, Johns Hopkins University, Baltimore, MD, USA
| | - Nina Cabezas-Wallscheid
- Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany; Centre for Integrative Biological Signalling Studies (CIBSS), Freiburg, Germany.
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13
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Spohr C, Poggio T, Andrieux G, Schönberger K, Cabezas-Wallscheid N, Boerries M, Halbach S, Illert AL, Brummer T. Gab2 deficiency prevents Flt3-ITD driven acute myeloid leukemia in vivo. Leukemia 2022; 36:970-982. [PMID: 34903841 PMCID: PMC8979819 DOI: 10.1038/s41375-021-01490-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/19/2021] [Accepted: 11/26/2021] [Indexed: 11/09/2022]
Abstract
Internal tandem duplications (ITD) of the FMS-like tyrosine kinase 3 (FLT3) predict poor prognosis in acute myeloid leukemia (AML) and often co-exist with inactivating DNMT3A mutations. In vitro studies implicated Grb2-associated binder 2 (GAB2) as FLT3-ITD effector. Utilizing a Flt3-ITD knock-in, Dnmt3a haploinsufficient mouse model, we demonstrate that Gab2 is essential for the development of Flt3-ITD driven AML in vivo, as Gab2 deficient mice displayed prolonged survival, presented with attenuated liver and spleen pathology and reduced blast counts. Furthermore, leukemic bone marrow from Gab2 deficient mice exhibited reduced colony-forming unit capacity and increased FLT3 inhibitor sensitivity. Using transcriptomics, we identify the genes encoding for Axl and the Ret co-receptor Gfra2 as targets of the Flt3-ITD/Gab2/Stat5 axis. We propose a pathomechanism in which Gab2 increases signaling of these receptors by inducing their expression and by serving as downstream effector. Thereby, Gab2 promotes AML aggressiveness and drug resistance as it incorporates these receptor tyrosine kinases into the Flt3-ITD signaling network. Consequently, our data identify GAB2 as a promising biomarker and therapeutic target in human AML.
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Affiliation(s)
- Corinna Spohr
- grid.5963.9Institute of Molecular Medicine and Cell Research, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany ,grid.5963.9Faculty of Biology, University of Freiburg, Freiburg, Germany ,grid.5963.9Spemann Graduate School of Biology and Medicine, University of Freiburg, Freiburg, Germany
| | - Teresa Poggio
- grid.5963.9Faculty of Biology, University of Freiburg, Freiburg, Germany ,grid.5963.9Department of Medicine I, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Geoffroy Andrieux
- grid.5963.9Institute of Medical Bioinformatics and Systems Medicine, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany ,grid.7497.d0000 0004 0492 0584German Cancer Consortium (DKTK), Partner Site Freiburg and German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Katharina Schönberger
- grid.5963.9Faculty of Biology, University of Freiburg, Freiburg, Germany ,grid.429509.30000 0004 0491 4256Max-Planck-Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany ,grid.4372.20000 0001 2105 1091International Max Planck Research School for Molecular and Cellular Biology (IMPRS-MCB), Freiburg, Germany
| | - Nina Cabezas-Wallscheid
- grid.429509.30000 0004 0491 4256Max-Planck-Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany ,Centre for Integrative Biological Signaling Studies (CIBSS), 79104 Freiburg, Germany
| | - Melanie Boerries
- grid.5963.9Institute of Medical Bioinformatics and Systems Medicine, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany ,grid.5963.9Comprehensive Cancer Center Freiburg (CCCF), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany ,grid.7497.d0000 0004 0492 0584German Cancer Consortium (DKTK), Partner Site Freiburg and German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Sebastian Halbach
- grid.5963.9Institute of Molecular Medicine and Cell Research, ZBMZ, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
| | - Anna L. Illert
- grid.5963.9Department of Medicine I, Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany ,grid.5963.9Comprehensive Cancer Center Freiburg (CCCF), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany ,grid.7497.d0000 0004 0492 0584German Cancer Consortium (DKTK), Partner Site Freiburg and German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Tilman Brummer
- Institute of Molecular Medicine and Cell Research, ZBMZ, Faculty of Medicine, University of Freiburg, 79104, Freiburg, Germany. .,Comprehensive Cancer Center Freiburg (CCCF), Medical Center, University of Freiburg, Faculty of Medicine, University of Freiburg, 79106, Freiburg, Germany. .,German Cancer Consortium (DKTK), Partner Site Freiburg and German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany. .,Center for Biological Signalling Studies BIOSS, University of Freiburg, 79104, Freiburg, Germany.
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14
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Sommerkamp P, Romero-Mulero MC, Narr A, Ladel L, Hustin L, Schönberger K, Renders S, Altamura S, Zeisberger P, Jäcklein K, Klimmeck D, Rodriguez-Fraticelli A, Camargo F, Perié L, Trumpp A, Cabezas-Wallscheid N. 3032 – MOUSE MULTIPOTENT PROGENITOR 5 CELLS ARE LOCATED AT THE INTERPHASE BETWEEN HEMATOPOIETIC STEM AND PROGENITOR CELLS. Exp Hematol 2021. [DOI: 10.1016/j.exphem.2021.12.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Renders S, Svendsen AF, Panten J, Rama N, Maryanovich M, Sommerkamp P, Ladel L, Redavid AR, Gibert B, Lazare S, Ducarouge B, Schönberger K, Narr A, Tourbez M, Dethmers-Ausema B, Zwart E, Hotz-Wagenblatt A, Zhang D, Korn C, Zeisberger P, Przybylla A, Sohn M, Mendez-Ferrer S, Heikenwälder M, Brune M, Klimmeck D, Bystrykh L, Frenette PS, Mehlen P, de Haan G, Cabezas-Wallscheid N, Trumpp A. Niche derived netrin-1 regulates hematopoietic stem cell dormancy via its receptor neogenin-1. Nat Commun 2021; 12:608. [PMID: 33504783 PMCID: PMC7840807 DOI: 10.1038/s41467-020-20801-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 12/14/2020] [Indexed: 01/30/2023] Open
Abstract
Haematopoietic stem cells (HSCs) are characterized by their self-renewal potential associated to dormancy. Here we identify the cell surface receptor neogenin-1 as specifically expressed in dormant HSCs. Loss of neogenin-1 initially leads to increased HSC expansion but subsequently to loss of self-renewal and premature exhaustion in vivo. Its ligand netrin-1 induces Egr1 expression and maintains quiescence and function of cultured HSCs in a Neo1 dependent manner. Produced by arteriolar endothelial and periarteriolar stromal cells, conditional netrin-1 deletion in the bone marrow niche reduces HSC numbers, quiescence and self-renewal, while overexpression increases quiescence in vivo. Ageing associated bone marrow remodelling leads to the decline of netrin-1 expression in niches and a compensatory but reversible upregulation of neogenin-1 on HSCs. Our study suggests that niche produced netrin-1 preserves HSC quiescence and self-renewal via neogenin-1 function. Decline of netrin-1 production during ageing leads to the gradual decrease of Neo1 mediated HSC self-renewal.
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Affiliation(s)
- Simon Renders
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
- Department of Internal Medicine V, Heidelberg University Hospital, Heidelberg, Germany
| | - Arthur Flohr Svendsen
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jasper Panten
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Nicolas Rama
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée "La Ligue," LabEx DEVweCAN, Institut Convergence Rabelais, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon1, Centre Léon Bérard, 69008, Lyon, France
| | - Maria Maryanovich
- Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Pia Sommerkamp
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Luisa Ladel
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Anna Rita Redavid
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée "La Ligue," LabEx DEVweCAN, Institut Convergence Rabelais, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon1, Centre Léon Bérard, 69008, Lyon, France
| | - Benjamin Gibert
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée "La Ligue," LabEx DEVweCAN, Institut Convergence Rabelais, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon1, Centre Léon Bérard, 69008, Lyon, France
| | - Seka Lazare
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Benjamin Ducarouge
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée "La Ligue," LabEx DEVweCAN, Institut Convergence Rabelais, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon1, Centre Léon Bérard, 69008, Lyon, France
| | | | - Andreas Narr
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
- Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Manon Tourbez
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Bertien Dethmers-Ausema
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Erik Zwart
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Agnes Hotz-Wagenblatt
- Core Facility Omics IT and Data Management, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Dachuan Zhang
- Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Claudia Korn
- Wellcome Trust/MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, CB2 0AH, UK
- Department of Haematology, University of Cambridge, Cambridge, CB2 0AH, UK
- NHS Blood and Transplant, Cambridge, CB2 0PT, UK
| | - Petra Zeisberger
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Adriana Przybylla
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Markus Sohn
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Simon Mendez-Ferrer
- Wellcome Trust/MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, CB2 0AH, UK
- Department of Haematology, University of Cambridge, Cambridge, CB2 0AH, UK
- NHS Blood and Transplant, Cambridge, CB2 0PT, UK
| | - Mathias Heikenwälder
- Division of Chronic Inflammation and Cancer, German Cancer Research Center Heidelberg (DKFZ), Heidelberg, Germany
| | - Maik Brune
- Department of Internal Medicine I and Clinical Chemistry, Heidelberg University Hospital, Heidelberg, Germany
| | - Daniel Klimmeck
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Leonid Bystrykh
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Paul S Frenette
- Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Patrick Mehlen
- Apoptosis, Cancer and Development Laboratory, Equipe labellisée "La Ligue," LabEx DEVweCAN, Institut Convergence Rabelais, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Université de Lyon1, Centre Léon Bérard, 69008, Lyon, France
| | - Gerald de Haan
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | | | - Andreas Trumpp
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120, Heidelberg, Germany.
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany.
- German Cancer Consortium (DKTK), 69120, Heidelberg, Germany.
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16
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Rack-Hoch A, Schönberger K, Ludwig MS, Hauck F, Hübner J, Hoch M. [Measles - still in focus]. MMW Fortschr Med 2019; 161:48-53. [PMID: 31691219 DOI: 10.1007/s15006-019-1062-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- Anita Rack-Hoch
- Dr. von Haunersches Kinderspital, Abteilung für Pädiatrische Infektiologie, Immundefektambulanz, München, Deutschland
| | - Katharina Schönberger
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL), Veterinärstraße 2, D-85762, Oberschleißheim, Deutschland
| | - Maria-Sabine Ludwig
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL), Veterinärstraße 2, D-85762, Oberschleißheim, Deutschland
| | - Fabian Hauck
- Dr. von Haunersches Kinderspital, Abteilung für Pädiatrische Infektiologie, Immundefektambulanz, München, Deutschland
| | - Johannes Hübner
- Dr. von Haunersches Kinderspital, Abteilung für Pädiatrische Infektiologie, Immundefektambulanz, München, Deutschland
| | - Martin Hoch
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL), Veterinärstraße 2, D-85762, Oberschleißheim, Deutschland.
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17
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Lampl BMJ, Lang M, Pregler M, Zowe M, Beck R, Schönberger K. Management of a measles outbreak in a reception facility for asylum seekers in Regensburg, Germany. GMS Hyg Infect Control 2019; 14:Doc06. [PMID: 31293877 PMCID: PMC6606947 DOI: 10.3205/dgkh000322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In July/August 2018, a measles outbreak occurred in a reception facility for asylum seekers in Regensburg, Bavaria, Germany. A five-year-old child and an 18-year-old man from Moldova were affected. At the time of the report, 491 people were accommodated at the facility. The outbreak was limited to the two cases mentioned by the consistent use of infection control measures. Decisive factors for successfully combating this outbreak were, in particular, the close cooperation of the local public health authority (Gesundheitsamt) with the district government officials, the institution's management, and the general practitioners on site. The measures taken included the early information of all parties involved, the timely and repeated implementation of containment vaccinations, a consequent segregation of contagion and/or disease suspects and the critical consideration of each individual case in connection with the separate risk-adapted segregation of particularly vulnerable cohorts.
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Affiliation(s)
- Benedikt M. J. Lampl
- Public Health Department Regensburg, Landratsamt Regensburg, Germany,*To whom correspondence should be addressed: Benedikt M. J. Lampl, Public Health Department Regensburg, Landratsamt Regensburg, Altmühlstr. 39, 3059 Regensburg, Germany, Phone: +49-941-4009-523, Fax: +49- 941-4009-764, E-mail:
| | - Markus Lang
- Public Health Department Regensburg, Landratsamt Regensburg, Germany
| | - Matthias Pregler
- Public Health Department Regensburg, Landratsamt Regensburg, Germany
| | - Marc Zowe
- District Government Oberpfalz, Bavaria, Germany
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18
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Marosevic D, Belting A, Schönberger K, Carl A, Wenzel JJ, Brey R. Hepatitis A Outbreak in the General Population due to a MSM-Associated HAV Genotype Linked to a Food Handler, November 2017-February 2018, Germany. Food Environ Virol 2019; 11:149-156. [PMID: 30868371 DOI: 10.1007/s12560-019-09375-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
Hepatitis A (HAV) is a viral infection causing a range of symptoms, sudden onset of fever, malaise, diarrhea, and jaundice. It is mostly transmitted fecal-oral through contaminated food, with immediate household and sexual contacts having a higher risk of infection. Since 2016 an increased number of HAV infections, mostly affecting men who have sex with men (MSM) have been noticed worldwide, with three main genotypes circulating. We report here on the first spillover outbreak of the MSM-associated HAV genotype RIVM-HAV16-090 in the German general population in November 2017-February 2018. In total, twelve cases could be attributed to the outbreak with the index case and a coworker in a butchers shop being the most probable source of the outbreak. The identical HAV genotype was detected in two environmental samples in the premises of the butchers shop and in nine cases. Outbreak control measures included detailed contact tracing and stool examinations, several environmental investigations, thorough cleaning, and disinfection of the premises of the butchers shop. Post-exposure vaccination was recommended to all unprotected contacts during the investigation. Furthermore, although hand-washing facilities were in accordance with the required law, additional installment of soap and disinfectant dispensers and contactless faucets has been recommended.
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Affiliation(s)
- Durdica Marosevic
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany.
| | - Anne Belting
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
| | | | - Anja Carl
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
| | - Jürgen J Wenzel
- Consultant laboratory for HAV and HEV, Institute of Clinical Microbiology and Hygiene, University Medical Centre Regensburg, Regensburg, Germany
| | - Roland Brey
- Health Authority Amberg-Sulzbach, Amberg, Germany
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19
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Ackermann N, Marosevic D, Hörmansdorfer S, Eberle U, Rieder G, Treis B, Berger A, Bischoff H, Bengs K, Konrad R, Hautmann W, Schönberger K, Belting A, Schlenk G, Margos G, Hoch M, Pürner F, Fingerle V, Liebl B, Sing A. Screening for infectious diseases among newly arrived asylum seekers, Bavaria, Germany, 2015. ACTA ACUST UNITED AC 2019. [PMID: 29536830 PMCID: PMC5850590 DOI: 10.2807/1560-7917.es.2018.23.10.17-00176] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Background and aimAs a consequence of socioeconomic and political crises in many parts of the world, many European Union/European Economic Area (EU/EEA) countries have faced an increasing number of migrants. In the German federal state of Bavaria, a mandatory health screening approach is implemented, where individuals applying for asylum have to undergo a medical examination that includes serological testing for HIV and hepatitis B, screening for tuberculosis, and until September 2015, stool examination for Salmonella spp. and Shigella spp.. Methods: Data from mandatory screening of all first-time asylum seekers in Bavaria in 2015 was extracted from the mandatory notification and laboratory information system and evaluated. Results: The HIV positivity and hepatitis B surface antigen (HBsAg) positivity rate of tested samples from asylum seekers were 0.3% and 3.3%, respectively, while detection rate of active tuberculosis was between 0.22% and 0.38%. The rates for HIV, hepatitis B, and tuberculosis among asylum seekers were similar to the corresponding prevalence rates in most of their respective countries of birth. Only 47 Salmonella spp. (0.1%) were isolated from stool samples: 45 enteric and two typhoid serovars. Beyond mandatory screening, louse-borne relapsing fever was found in 40 individuals. Conclusions: These results show that mandatory screening during 2015 in Bavaria yielded overall low positivity rates for all tested infectious diseases in asylum seekers. A focus of mandatory screening on specific diseases in asylum seekers originating from countries with higher prevalence of those diseases could facilitate early diagnosis and provision of treatment to affected individuals while saving resources.
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Affiliation(s)
- Nikolaus Ackermann
- These authors contributed equally to the paper.,LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Durdica Marosevic
- European Public Health Microbiology Training Programme (EUPHEM), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden.,These authors contributed equally to the paper.,LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Stefan Hörmansdorfer
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Ute Eberle
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Gabriele Rieder
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Bianca Treis
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Anja Berger
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Heribert Bischoff
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Katja Bengs
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Regina Konrad
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Wolfgang Hautmann
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Katharina Schönberger
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Anne Belting
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Gisela Schlenk
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Gabriele Margos
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Martin Hoch
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Friedrich Pürner
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Volker Fingerle
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Bernhard Liebl
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
| | - Andreas Sing
- LGL Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit Oberschleißheim, Oberschleißheim, Germany
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20
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Sommerkamp P, Renders S, Ladel L, Hotz-Wagenblatt A, Schönberger K, Zeisberger P, Przybylla A, Sohn M, Zhou Y, Klibanski A, Cabezas-Wallscheid N, Trumpp A. The long non-coding RNA Meg3 is dispensable for hematopoietic stem cells. Sci Rep 2019; 9:2110. [PMID: 30765776 PMCID: PMC6375991 DOI: 10.1038/s41598-019-38605-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 01/02/2019] [Indexed: 12/15/2022] Open
Abstract
The long non-coding RNA (lncRNA) Maternally Expressed Gene 3 (Meg3) is encoded within the imprinted Dlk1-Meg3 gene locus and is only maternally expressed. Meg3 has been shown to play an important role in the regulation of cellular proliferation and functions as a tumor suppressor in numerous tissues. Meg3 is highly expressed in mouse adult hematopoietic stem cells (HSCs) and strongly down-regulated in early progenitors. To address its functional role in HSCs, we used MxCre to conditionally delete Meg3 in the adult bone marrow of Meg3mat-flox/pat-wt mice. We performed extensive in vitro and in vivo analyses of mice carrying a Meg3 deficient blood system, but neither observed impaired hematopoiesis during homeostatic conditions nor upon serial transplantation. Furthermore, we analyzed VavCre Meg3mat-flox/pat-wt mice, in which Meg3 was deleted in the embryonic hematopoietic system and unexpectedly this did neither generate any hematopoietic defects. In response to interferon-mediated stimulation, Meg3 deficient adult HSCs responded highly similar compared to controls. Taken together, we report the finding, that the highly expressed imprinted lncRNA Meg3 is dispensable for the function of HSCs during homeostasis and in response to stress mediators as well as for serial reconstitution of the blood system in vivo.
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Affiliation(s)
- Pia Sommerkamp
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany.,Faculty of Biosciences, Heidelberg University, 69117, Heidelberg, Germany
| | - Simon Renders
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Luisa Ladel
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Agnes Hotz-Wagenblatt
- Core Facility Omics IT and Data Management, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany
| | - Katharina Schönberger
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany.,Max Planck Institute of Immunobiology and Epigenetics, 79108, Freiburg, Germany
| | - Petra Zeisberger
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Adriana Przybylla
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Markus Sohn
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany
| | - Yunli Zhou
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 02114, USA
| | - Anne Klibanski
- Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, 02114, USA
| | - Nina Cabezas-Wallscheid
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany. .,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany. .,Max Planck Institute of Immunobiology and Epigenetics, 79108, Freiburg, Germany.
| | - Andreas Trumpp
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany. .,Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120, Heidelberg, Germany.
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21
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Kleta S, Hammerl JA, Dieckmann R, Malorny B, Borowiak M, Halbedel S, Prager R, Trost E, Flieger A, Wilking H, Vygen-Bonnet S, Busch U, Messelhäußer U, Horlacher S, Schönberger K, Lohr D, Aichinger E, Luber P, Hensel A, Al Dahouk S. Molecular Tracing to Find Source of Protracted Invasive Listeriosis Outbreak, Southern Germany, 2012-2016. Emerg Infect Dis 2018; 23:1680-1683. [PMID: 28930013 PMCID: PMC5621528 DOI: 10.3201/eid2310.161623] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
We investigated 543 Listeria monocytogenes isolates from food having a temporal and spatial distribution compatible with that of the invasive listeriosis outbreak occurring 2012–2016 in southern Germany. Using forensic microbiology, we identified several products from 1 manufacturer contaminated with the outbreak genotype. Continuous molecular surveillance of food isolates could prevent such outbreaks.
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22
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Marosevic D, Schönberger K, Ackermann N, Sing A. Laborergebnisse von Syphilis- und HIV Ko-Infektionen in Bayern 2010 – 2016. Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1639265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- D Marosevic
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Public Health Microbiologie und Infektionsepidemiologie, Neufahrn bei Freising, Germany
| | - K Schönberger
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Public Health Mikrobiologie und Infektionsepidemiologie, Oberschleissheim, Germany
| | - N Ackermann
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Public Health Mikrobiologie und Infektionsepidemiologie, Oberschleissheim, Germany
| | - A Sing
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern) Public Health Mikrobiologie und Infektionsepidemiologie, Oberschleissheim, Germany
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23
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Heinzinger S, Eberle U, Marosevic D, Schönberger K, Ackermann N, Sing A. Das Bayern Influenza Sentinel (BIS). Das Gesundheitswesen 2018. [DOI: 10.1055/s-0038-1639292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- S Heinzinger
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), GE2 - Public Health, Mikrobiologie und Infektionsepidemiologie, Oberschleißheim, Germany
| | - U Eberle
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), GE2 - Public Health, Mikrobiologie und Infektionsepidemiologie, Oberschleißheim, Germany
| | - D Marosevic
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), GE2 - Public Health, Mikrobiologie und Infektionsepidemiologie, Oberschleißheim, Germany
| | - K Schönberger
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), GE2 - Public Health, Mikrobiologie und Infektionsepidemiologie, Oberschleißheim, Germany
| | - N Ackermann
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), GE2 - Public Health, Mikrobiologie und Infektionsepidemiologie, Oberschleißheim, Germany
| | - A Sing
- Bayerisches Landesamt für Gesundheit und Lebensmittelsicherheit (LGL Bayern), GE2 - Public Health, Mikrobiologie und Infektionsepidemiologie, Oberschleißheim, Germany
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24
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Hörmansdorfer S, Messelhäußer U, Rampp A, Schönberger K, Dallman T, Allerberger F, Kornschober C, Sing A, Wallner P, Zapf A. Re-evaluation of a 2014 multi-country European outbreak of Salmonella Enteritidis phage type 14b using recent epidemiological and molecular data. Euro Surveill 2017; 22:17-00196. [PMID: 29258650 PMCID: PMC5743097 DOI: 10.2807/1560-7917.es.2017.22.50.17-00196] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 08/15/2017] [Indexed: 11/25/2022] Open
Abstract
A European multi-country outbreak of Salmonella Enteritidis phage type (PT) 14b occurred from March to November 2014 associated with the consumption of eggs. The outbreak involved more than 400 human cases from France, Luxembourg, Austria and the United Kingdom. In 2016-2017, it has been re-evaluated combining recent epidemiological results with latest molecular data. The outbreak was traced back to one large Bavarian egg producer with four distinct premises, three located in Bavaria, one in the Czech Republic. The outbreak isolates of S. Enteritidis PT 14b were grouped into three closely related clades by whole genome sequencing. Two of these clades could be referred to two Bavarian premises of the egg producer on the basis of epidemiological and molecular data, while epidemiological data presumably linked the third clade to another premises of the egg producer. Interestingly and in contrast to the situation in other European countries where several outbreaks were documented, all notified 91 laboratory-confirmed cases of S. Enteritidis PT 14b from Bavaria were sporadic, singular cases not belonging to any epidemiological outbreaks. In conclusion, as demonstrated here, the resolution of food-related outbreaks with such a high discriminatory power is rare in outbreak investigation.
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Affiliation(s)
| | - Ute Messelhäußer
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
| | - Albert Rampp
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
| | | | - Tim Dallman
- Gastrointestinal Bacterial Reference Unit, London, United Kingdom
| | - Franz Allerberger
- Austrian Agency for Health and Food Safety (AGES), NRC Salmonella, Graz, Austria
| | | | - Andreas Sing
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
| | - Peter Wallner
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
| | - Andreas Zapf
- Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
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25
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Abstract
Metabolic cues and (epi-)genetic factors are emerging regulators of hematopoietic stem cell (HSC) potency. Two new studies in Nature and Cell, from Agathocleous et al. (2017) and Cimmino et al. (2017), respectively, show that vitamin C regulates HSC function and suppresses leukemogenesis by modulating Tet2 activity.
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26
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Cabezas-Wallscheid N, Buettner F, Sommerkamp P, Klimmeck D, Ladel L, Thalheimer F, Pastor-Flores D, Roma L, Renders S, Zeisberger P, Przybylla A, Schönberger K, Scognamiglio R, Altamura S, Florian C, Fawaz M, Vonficht D, Tesio M, Collier P, Pavlinik D, Geiger H, Schröder T, Benes V, Dick T, Rieger M, Stegle O, Trumpp A. Vitamin A/ retinoic acid signaling regulates hematopoietic stem cell dormancy. Exp Hematol 2017. [DOI: 10.1016/j.exphem.2017.06.300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Renders S, Sommerkamp P, Panten J, Ladel L, Przybylla A, Zeisberger P, Klimmeck D, Schönberger K, Cabezas-Wallscheid N, Trumpp A. Neogenin regulates hematopoietic stem cell quiescence and maintenance. Exp Hematol 2017. [DOI: 10.1016/j.exphem.2017.06.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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28
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Sommerkamp P, Renders S, Ladel L, Schönberger K, Zeisberger P, Przybylla A, Cabezas-Wallscheid N, Trumpp A. The role of the lncRNA Meg3 in the adult hematopoietic compartment. Exp Hematol 2017. [DOI: 10.1016/j.exphem.2017.06.119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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29
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Cabezas-Wallscheid N, Buettner F, Sommerkamp P, Klimmeck D, Ladel L, Thalheimer FB, Pastor-Flores D, Roma LP, Renders S, Zeisberger P, Przybylla A, Schönberger K, Scognamiglio R, Altamura S, Florian CM, Fawaz M, Vonficht D, Tesio M, Collier P, Pavlinic D, Geiger H, Schroeder T, Benes V, Dick TP, Rieger MA, Stegle O, Trumpp A. Vitamin A-Retinoic Acid Signaling Regulates Hematopoietic Stem Cell Dormancy. Cell 2017; 169:807-823.e19. [PMID: 28479188 DOI: 10.1016/j.cell.2017.04.018] [Citation(s) in RCA: 288] [Impact Index Per Article: 41.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/06/2017] [Accepted: 04/12/2017] [Indexed: 02/07/2023]
Abstract
Dormant hematopoietic stem cells (dHSCs) are atop the hematopoietic hierarchy. The molecular identity of dHSCs and the mechanisms regulating their maintenance or exit from dormancy remain uncertain. Here, we use single-cell RNA sequencing (RNA-seq) analysis to show that the transition from dormancy toward cell-cycle entry is a continuous developmental path associated with upregulation of biosynthetic processes rather than a stepwise progression. In addition, low Myc levels and high expression of a retinoic acid program are characteristic for dHSCs. To follow the behavior of dHSCs in situ, a Gprc5c-controlled reporter mouse was established. Treatment with all-trans retinoic acid antagonizes stress-induced activation of dHSCs by restricting protein translation and levels of reactive oxygen species (ROS) and Myc. Mice maintained on a vitamin A-free diet lose HSCs and show a disrupted re-entry into dormancy after exposure to inflammatory stress stimuli. Our results highlight the impact of dietary vitamin A on the regulation of cell-cycle-mediated stem cell plasticity. VIDEO ABSTRACT.
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Affiliation(s)
- Nina Cabezas-Wallscheid
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany.
| | - Florian Buettner
- European Molecular Biology Laboratory, European Bioinformatics Institute (EBI), Wellcome Genome Campus, Hinxton, Cambridge CB10 1SD, UK
| | - Pia Sommerkamp
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Daniel Klimmeck
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Luisa Ladel
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Frederic B Thalheimer
- LOEWE Center for Cell and Gene Therapy and Department of Medicine, Hematology/Oncology, Goethe University Frankfurt, 60590 Frankfurt am Main, Germany
| | - Daniel Pastor-Flores
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Leticia P Roma
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Simon Renders
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Petra Zeisberger
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Adriana Przybylla
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Katharina Schönberger
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Roberta Scognamiglio
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Sandro Altamura
- Department of Pediatric Hematology, Oncology and Immunology, University of Heidelberg, 69120 Heidelberg, Germany
| | - Carolina M Florian
- Institute for Molecular Medicine, Stem Cells and Aging, Ulm University, 89081 Ulm, Germany
| | - Malak Fawaz
- LOEWE Center for Cell and Gene Therapy and Department of Medicine, Hematology/Oncology, Goethe University Frankfurt, 60590 Frankfurt am Main, Germany
| | - Dominik Vonficht
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Melania Tesio
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany
| | - Paul Collier
- Genomics Core Facility, European Molecular Biology Laboratory (EMBL), 69117 Heidelberg, Germany
| | - Dinko Pavlinic
- Genomics Core Facility, European Molecular Biology Laboratory (EMBL), 69117 Heidelberg, Germany
| | - Hartmut Geiger
- Institute for Molecular Medicine, Stem Cells and Aging, Ulm University, 89081 Ulm, Germany
| | - Timm Schroeder
- Department of Biosystems Science and Engineering (D-BSSE), ETH Zurich, 4058 Basel, Switzerland
| | - Vladimir Benes
- Genomics Core Facility, European Molecular Biology Laboratory (EMBL), 69117 Heidelberg, Germany
| | - Tobias P Dick
- Division of Redox Regulation, DKFZ-ZMBH Alliance, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Michael A Rieger
- LOEWE Center for Cell and Gene Therapy and Department of Medicine, Hematology/Oncology, Goethe University Frankfurt, 60590 Frankfurt am Main, Germany
| | - Oliver Stegle
- European Molecular Biology Laboratory, European Bioinformatics Institute (EBI), Wellcome Genome Campus, Hinxton, Cambridge CB10 1SD, UK
| | - Andreas Trumpp
- Division of Stem Cells and Cancer, German Cancer Research Center (DKFZ) and DKFZ-ZMBH Alliance, 69120 Heidelberg, Germany; Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany; German Cancer Consortium (DKTK), 69120 Heidelberg, Germany.
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Teutsch B, Berger A, Marosevic D, Schönberger K, Lâm TT, Hubert K, Beer S, Wienert P, Ackermann N, Claus H, Drayß M, Thiel K, van der Linden M, Vogel U, Sing A. Corynebacterium species nasopharyngeal carriage in asymptomatic individuals aged ≥ 65 years in Germany. Infection 2017; 45:607-611. [PMID: 28429151 DOI: 10.1007/s15010-017-1017-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 04/07/2017] [Indexed: 01/23/2023]
Abstract
PURPOSE The prevalence of protective anti-diphtheria toxin antibodies decreases with age. Therefore, the elderly might serve as reservoir for potentially toxigenic Corynebacterium (C.) species (C. diphtheriae, C. ulcerans, and C. pseudotuberculosis). This study aimed to examine the colonization rate of the nasopharynx with corynebacteria of individuals aged 65 years and older. METHODS In the period from October 2012 to June 2013, nasal and throat swabs were taken from 714 asymptomatic subjects aged 65-106 years (average age 77.2) at three regions in Germany and investigated for Corynebacterium species. RESULTS A total of 402 strains of Corynebacterium species were isolated from 388 out of 714 asymptomatic subjects (carriage rate 54.3%). The carriage rate was significantly higher in study participants living in retirement homes (68.4%) compared to those living autonomously at home (51.1%). Strains were isolated mostly from the nose (99%). Corynebacterium accolens was the most often isolated species (39.8%), followed by C. propinquum (24.1%), C. pseudodiphtheriticum (19.4%), and C. tuberculostearicum (10.2%). No C. diphtheriae, C. ulcerans, and C. pseudotuberculosis strains were isolated. A subsample of 74 subjects was tested serologically for anti-diphtheria antibodies. Protective anti-diphtheria toxin antibodies were found in 29.7% of the subjects; 70.3% showed no protective immunity. CONCLUSIONS These results suggest that carriage of potentially toxigenic corynebacteria is very rare among people aged 65 and older in Germany. However, the low prevalence of protective anti-diphtheria toxin antibodies might pose a risk for acquiring diphtheria especially for the elderly.
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Affiliation(s)
- Barbara Teutsch
- Bavarian Health and Food Safety Authority, Veterinärstraße 2, 85764, Oberschleißheim, Germany
| | - Anja Berger
- Bavarian Health and Food Safety Authority, Veterinärstraße 2, 85764, Oberschleißheim, Germany.,National Consiliary Laboratory for Diphtheria, Oberschleißheim, Germany
| | - Durdica Marosevic
- Bavarian Health and Food Safety Authority, Veterinärstraße 2, 85764, Oberschleißheim, Germany.,European Programme for Public Health Microbiology Training, European Centre of Disease Prevention and Control (ECDC), Stockholm, Sweden
| | - Katharina Schönberger
- Bavarian Health and Food Safety Authority, Veterinärstraße 2, 85764, Oberschleißheim, Germany
| | - Thiên-Trí Lâm
- National Reference Center for Meningococci and Haemophilus Influenzae, Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Kerstin Hubert
- National Reference Center for Meningococci and Haemophilus Influenzae, Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Steffi Beer
- Sanitätsdienst der Bundeswehr, Koblenz, Germany
| | | | - Nikolaus Ackermann
- Bavarian Health and Food Safety Authority, Veterinärstraße 2, 85764, Oberschleißheim, Germany
| | - Heike Claus
- National Reference Center for Meningococci and Haemophilus Influenzae, Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Maria Drayß
- National Reference Center for Meningococci and Haemophilus Influenzae, Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Kathrin Thiel
- National Reference Center for Meningococci and Haemophilus Influenzae, Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Mark van der Linden
- National Reference Center for Streptococci, Institut für Medizinische Mikrobiologie des UKA, RWTH Aachen, Aachen, Germany
| | - Ulrich Vogel
- National Reference Center for Meningococci and Haemophilus Influenzae, Institute for Hygiene and Microbiology, University of Würzburg, Würzburg, Germany
| | - Andreas Sing
- Bavarian Health and Food Safety Authority, Veterinärstraße 2, 85764, Oberschleißheim, Germany. .,National Consiliary Laboratory for Diphtheria, Oberschleißheim, Germany.
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31
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Hoch M, Wieser A, Löscher T, Margos G, Pürner F, Zühl J, Seilmaier M, Balzer L, Guggemos W, Rack-Hoch A, von Both U, Hauptvogel K, Schönberger K, Hautmann W, Sing A, Fingerle V. Louse-borne relapsing fever (Borrelia recurrentis) diagnosed in 15 refugees from northeast Africa: epidemiology and preventive control measures, Bavaria, Germany, July to October 2015. ACTA ACUST UNITED AC 2016; 20:30046. [PMID: 26538532 DOI: 10.2807/1560-7917.es.2015.20.42.30046] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 10/22/2015] [Indexed: 11/20/2022]
Abstract
We report 15 imported louse-borne relapsing fever (LBRF) cases in refugees in Bavaria, Germany. One patient died. Epidemiological findings confirmed that all were young males from the Horn of Africa (12 from Somalia), who had similar migration routes converging in Sudan continuing through Libya and Italy. The majority likely acquired their infection during migration. Healthcare workers should be aware of LBRF in refugees passing through north Africa to ensure correct treatment and preventive measures.
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Affiliation(s)
- Martin Hoch
- Task-Force Infectiology and International Health Regulations, Bavarian Health and Food Safety Authority (LGL), Oberschleißheim, Germany
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Ruppitsch W, Prager R, Halbedel S, Hyden P, Pietzka A, Huhulescu S, Lohr D, Schönberger K, Aichinger E, Hauri A, Stark K, Vygen S, Tietze E, Allerberger F, Wilking H. Ongoing outbreak of invasive listeriosis, Germany, 2012 to 2015. Euro Surveill 2015; 20:30094. [DOI: 10.2807/1560-7917.es.2015.20.50.30094] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 12/17/2015] [Indexed: 12/15/2022] Open
Abstract
Listeriosis patient isolates in Germany have shown a new identical pulsed-field gel electrophoresis (PFGE) pattern since 2012 (n = 66). Almost all isolates (Listeria monocytogenes serotype 1/2a) belonged to cases living in southern Germany, indicating an outbreak with a so far unknown source. Case numbers in 2015 are high (n = 28). No outbreak cases outside Germany have been reported. Next generation sequencing revealed the unique cluster type CT1248 and confirmed the outbreak. Investigations into the source are ongoing.
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Affiliation(s)
- Werner Ruppitsch
- German-Austrian Binational Consiliary Laboratory for Listeria, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
- These authors contributed equally
| | - Rita Prager
- These authors contributed equally
- Division Enteropathogenic Bacteria and Legionella, Robert Koch Institute (RKI), Wernigerode, Germany
| | - Sven Halbedel
- Division Enteropathogenic Bacteria and Legionella, Robert Koch Institute (RKI), Wernigerode, Germany
| | - Patrick Hyden
- German-Austrian Binational Consiliary Laboratory for Listeria, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Ariane Pietzka
- German-Austrian Binational Consiliary Laboratory for Listeria, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Steliana Huhulescu
- German-Austrian Binational Consiliary Laboratory for Listeria, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Dorothee Lohr
- Baden-Wuerttemberg State Health Office, Stuttgart, Germany
- European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
| | | | | | - Anja Hauri
- Hesse State Health Office, Dillenburg, Germany
| | - Klaus Stark
- Division for Gastrointestinal Infections, Zoonoses and Tropical Infections, Robert Koch Institute (RKI), Berlin, Germany
| | - Sabine Vygen
- Division for Gastrointestinal Infections, Zoonoses and Tropical Infections, Robert Koch Institute (RKI), Berlin, Germany
| | - Erhard Tietze
- Division Enteropathogenic Bacteria and Legionella, Robert Koch Institute (RKI), Wernigerode, Germany
| | - Franz Allerberger
- German-Austrian Binational Consiliary Laboratory for Listeria, Austrian Agency for Health and Food Safety (AGES), Vienna, Austria
| | - Hendrik Wilking
- Division for Gastrointestinal Infections, Zoonoses and Tropical Infections, Robert Koch Institute (RKI), Berlin, Germany
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Schönberger K, Sing A, Wildner M, Liebl B, Hautmann W. Epidemiologie der Masern in Bayern. Wo stehen wir, wo wollen wir hin. Gesundheitswesen 2015. [DOI: 10.1055/s-0035-1563133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Riedel C, Schönberger K, Yang S, Koshy G, Chen YC, Gopinath B, Ziebarth S, von Kries R. Parental smoking and childhood obesity: higher effect estimates for maternal smoking in pregnancy compared with paternal smoking--a meta-analysis. Int J Epidemiol 2014; 43:1593-606. [PMID: 25080528 DOI: 10.1093/ije/dyu150] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Some studies reported similar effect estimates for the impact of maternal smoking in pregnancy and paternal smoking on childhood obesity, whereas others suggested higher effects for maternal smoking. We performed a meta-analysis to compare the effect of in utero exposure to maternal smoking and that of paternal or household smoking exposure in utero or after birth with mutual adjustment. METHODS Meta-analysis of observational studies identified in MEDLINE, EMBASE and Web of Knowledge published in 1900-2013. Study inclusion criterion was assessment of the association of maternal smoking during pregnancy and paternal or household smoking (anyone living in the household who smokes) at any time with childhood overweight and obesity. The analyses were based on all studies with mutually adjusted effect estimates for maternal and paternal/household smoking applying a random-effects model. RESULTS Data for 109,838 mother/child pairs were reported in 12 studies. The pooled odds ratios (ORs) for overweight 1.33 [95% confidence interval (CI) 1.23;1.44] (n=6, I2=0.00%) and obesity 1.60 (95% CI 1.37;1.88) (n=4, I2=32.47%) for maternal smoking during pregnancy were higher than for paternal smoking: 1.07 (95% CI 1.00;1.16) (n=6, I2=41.34%) and 1.23 (95% CI 1.10;1.38) (n=4, I2=14.61%), respectively. Similar estimates with widely overlapping confidence limits were found for maternal smoking during pregnancy and childhood overweight and obesity: 1.35 (95% CI 1.20;1.51) (n=3, I2=0.00%) and 1.28 (95% CI 1.07;1.54) (n=3, I2=0.00%) compared with household smoking 1.22 (95% CI 1.06;1.39) (n=3, I2=72.14%) and 1.31 (95% CI 1.15;1.50)] (n=3, I2=0.00%). CONCLUSIONS Higher effect estimates for maternal smoking in pregnancy compared with paternal smoking in mutually adjusted models may suggest a direct intrauterine effect.
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Affiliation(s)
- Christina Riedel
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Katharina Schönberger
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Seungmi Yang
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Gibby Koshy
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Yang-Ching Chen
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Bamini Gopinath
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Stephanie Ziebarth
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
| | - Rüdiger von Kries
- Ludwig Maximilian University of Munich, Institute of Social Paediatrics and Adolescent Medicine, Munich, Germany, Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada, Child and Reproductive Health Group, Liverpool School of Tropical Medicine, Liverpool, UK, Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan, Department of Family Medicine, Taipei City Hospital, ZhongXing Branch, Taipei, Taiwan and Centre for Vision Research, Department of Ophthalmology and Westmead Millennium Institute, University of Sydney, Sydney, Australia
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Schönberger K, Ludwig MS, Wildner M, Weissbrich B. Epidemiology of subacute sclerosing panencephalitis (SSPE) in Germany from 2003 to 2009: a risk estimation. PLoS One 2013; 8:e68909. [PMID: 23874807 PMCID: PMC3706451 DOI: 10.1371/journal.pone.0068909] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Accepted: 06/05/2013] [Indexed: 11/19/2022] Open
Abstract
Subacute sclerosing panencephalitis (SSPE) is a fatal long-term complication of measles infection. We performed an estimation of the total number of SSPE cases in Germany for the period 2003 to 2009 and calculated the risk of SSPE after an acute measles infection. SSPE cases were collected from the Surveillance Unit for Rare Paediatric Diseases in Germany and the Institute of Virology and Immunobiology at the University of Würzburg. The total number of SSPE cases was estimated by capture-recapture analysis. For the period 2003 to 2009, 31 children with SSPE who were treated at German hospitals were identified. The capture-recapture estimate was 39 cases (95% confidence interval: 29.2–48.0). The risk of developing SSPE for children contracting measles infection below 5 years of age was calculated as 1∶1700 to 1∶3300. This risk is in the same order of magnitude as the risk of a fatal acute measles infection.
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Affiliation(s)
- Katharina Schönberger
- Department of Public Health, Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
| | - Maria-Sabine Ludwig
- Department of Public Health, Bavarian Health and Food Safety Authority, Erlangen, Germany
| | - Manfred Wildner
- Department of Public Health, Bavarian Health and Food Safety Authority, Oberschleissheim, Germany
| | - Benedikt Weissbrich
- Institute of Virology and Immunobiology, Julius-Maximilian University of Würzburg, Würzburg, Germany
- * E-mail:
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Schönberger K, Riedel C, Rückinger S, Mansmann U, Jilg W, Kries RV. Determinants of Long-term protection after hepatitis B vaccination in infancy: a meta-analysis. Pediatr Infect Dis J 2013; 32:307-13. [PMID: 23249904 DOI: 10.1097/inf.0b013e31827bd1b0] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND The duration of protection after hepatitis B vaccination in early infancy is unclear and may be related to vaccination schedule, dosage, vaccine type and population characteristics. Factors potentially influencing waning immunity were assessed. METHODS A systematic review was performed. The main outcomes were prevalence of anti-hepatits B antibodies ≥ 10 mIU/mL after primary or booster vaccination. Factors potentially influencing protection were assessed in an adjusted random-effects meta-analysis model by age for both outcomes. Results of both meta-analyses were combined in a prognostic model. RESULTS Forty-six studies reporting on the anti-hepatits B antibodies ≥ 10 mIU/mL 5 to 20 years after primary immunization and 29 on booster response were identified. The adjusted meta-analyses identified maternal carrier status (odds ratio [OR]: 2.37 [1.11; 5.08]), lower vaccine dosage than presently recommended (OR: 0.14 [0.06; 0.30]) and gap time between last and preceding dose of the primary vaccine series (OR: 0.44 [0.22; 0.86]) as determinants for persistence of anti-hepatits B antibodies ≥ 10. A lower vaccine dosage was also associated with failure to respond to booster (OR: 0.20 [0.10; 0.38]). The prognostic model predicted long-term protection of 90% [77%; 100%] at the age of 17 years for offspring of noncarrier mothers vaccinated with a presently recommended dose and vaccination schedule. CONCLUSIONS Based on meta-analyses, predictors of waning immunity after hepatitis B vaccination in infancy could be identified. A prognostic model for long-term protection after hepatitis B vaccination in infancy was developed.
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Affiliation(s)
- Katharina Schönberger
- Institute of Social Pediatrics and Adolescent Medicine, Division of Epidemiology, Biostatistics and Epidemiology, Ludwig Maximilians University of Munich, Germany.
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Schönberger K, Riedel C, Rückinger S, Mansmann U, Jilg W, von Kries R. Impact of maternal carrier status on immunologic markers for protection after hepatitis B vaccination in infancy: A meta-analysis. Vaccine 2012; 30:6314-26. [DOI: 10.1016/j.vaccine.2012.07.080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 07/27/2012] [Accepted: 07/30/2012] [Indexed: 12/21/2022]
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Schönberger K, Ludwig MS, Wildner M, Kalies H. Timely MMR vaccination in infancy: influence of attitudes and medical advice on the willingness to vaccinate. Klin Padiatr 2012; 224:437-42. [PMID: 22821294 DOI: 10.1055/s-0032-1321731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In light of the failure to eliminate measles by 2010, the closure of any gaps in immunisation coverage is of paramount importance to interrupt transmission and to protect vulnerable individuals. Not only vaccination-critical attitudes of parents but furthermore the medical advice by physician in charge influence the vaccine uptake. 3 groups of factors which potentially influence parental decisions on child vaccination were analysed by univariable and multivariable logistic regression for the timely uptake of the first and the second dose of measles vaccination: parents' attitudes towards immunization, the influence of medical and laypersons and the influence of the advice of a medical doctor. A total of 3 041 children were eligible for the analysis. 53.0% of these received the first and 42.9% the second MMR dose in time. If parents considered that vaccinations are important and protective as well as the consulted physician advices towards vaccinations, children had significantly higher chances of a timely vaccination. Whereas, if parents were afraid of vaccinations or get advised by an alternative practitioner, the children had lower chances of being vaccinated in time. If medical providers help parents to reduce uncertainties about vaccination the chance for children to be vaccinated in time increased. It appeared that there still are unmet information needs after the medical consultation. By and large the medical advice plays an important role for vaccination uptake and its timing. In order to raise the vaccination rates further target-population specific approaches are needed.
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Affiliation(s)
- K Schönberger
- Division of Epidemiology, Institute of Social Paediatrics and Adolescent Medicine, Ludwig-Maximilians-University of Munich, Germany.
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Ludwig MS, Fischer R, Angermayr L, Schönberger K, Hautmann W, Nennstiel-Ratzel U, Wildner M, Liebl B, Zapf A. Die Bayerischen Impfwochen im Jahr 2009 und 2011: Erfolg durch partnerschaftliche Zusammenarbeit in der Bayerischen Landesarbeitsgemeinschaft Impfen (LAGI). Gesundheitswesen 2011. [DOI: 10.1055/s-0031-1274476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hölscher G, Kuhn J, Ludwig S, Angermayr L, Schönberger K, Nennstiel-Ratzel U. Evidenzbasierte Masernprävention in Bayern. Gesundheitswesen 2011. [DOI: 10.1055/s-0031-1274464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pfaff G, Lohr D, Santibanez S, Mankertz A, van Treeck U, Schönberger K, Hautmann W. Spotlight on measles 2010: Measles outbreak among travellers returning from a mass gathering, Germany, September to October 2010. Euro Surveill 2010. [DOI: 10.2807/ese.15.50.19750-en] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Binary file ES_Abstracts_Final_ECDC.txt matches
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Affiliation(s)
- G Pfaff
- Baden-Wuerttemberg State Health Office, District of Stuttgart Government, Stuttgart, Germany
| | - D Lohr
- Baden-Wuerttemberg State Health Office, District of Stuttgart Government, Stuttgart, Germany
| | - S Santibanez
- National Reference Centre for Measles, Mumps and Rubella (NRC MMR), Robert Koch Institute (RKI), Berlin, Germany
| | - A Mankertz
- National Reference Centre for Measles, Mumps and Rubella (NRC MMR), Robert Koch Institute (RKI), Berlin, Germany
| | - U van Treeck
- NRW Institute of Health and Work, Düsseldorf, Germany
| | - K Schönberger
- Bavarian Health and Food Safety Agency, Oberschleißheim, Germany
| | - W Hautmann
- Bavarian Health and Food Safety Agency, Oberschleißheim, Germany
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Schönberger K, Wissmann BV, Hautmann W, Walters L, Höller C, Wildner M. Epidemiologische Nachbefragung eines Gastroenteritis Ausbruchs in den Allgäuer Alpen. Gesundheitswesen 2010. [DOI: 10.1055/s-0030-1266649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Schlipköter U, Winhard M, Schönberger K, Liebl B, von Kries R. [Evaluation of a pilot study on measles vaccination in Bavarian preschool children]. Gesundheitswesen 2008; 70:404-7. [PMID: 18729029 DOI: 10.1055/s-0028-1082076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Several areas of Bavaria show measles vaccination coverage in preschool children below 95%. Repeated outbreaks could be attributed to this situation. A recollection model in nurseries was tested in order to document the vaccination rate in this age group and to measure the percentage of vaccinations due to intervention. Parents of new entrants to nurseries in a randomly selected rural district were asked to provide measles vaccination records of their kids and to fill in a questionnaire. 121 out of 144 vaccination records (85%) documented a complete immunisation status for measles. 12 children had not been vaccinated against measles, 10 children had received one vaccination. Eight out of these 22 children obtained supplementary measles immunisation at the time of ascertainment. The results provided are of limited statistical significance due to the small sample size. Further intervention studies have to be conducted and should even include measures supported by legal regulations.
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Affiliation(s)
- U Schlipköter
- Institut für Medizinische Informationsverarbeitung, Biometrie und Epidemiologie, Postgradualer Studiengang Offentliche Gesundheit und Epidemiologie, Ludwig Maximilians Universität München.
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