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Taei A, Samadian A, Ghezel-Ayagh Z, Mollamohammadi S, Moradi S, Kiani T, Janzamin E, Farzaneh Z, Tahamtani Y, Braun T, Hassani SN, Baharvand H. Suppression of p38-MAPK endows endoderm propensity to human embryonic stem cells. Biochem Biophys Res Commun 2020; 527:811-817. [PMID: 32446562 DOI: 10.1016/j.bbrc.2020.04.119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 04/22/2020] [Indexed: 12/28/2022]
Abstract
The ability of human embryonic stem cells (hESCs) to proliferate unlimitedly and give rise to all tissues makes these cells a promising source for cell replacement therapies. To realize the full potential of hESCs in cell therapy, it is necessary to interrogate regulatory pathways that influence hESC maintenance and commitment. Here, we reveal that pharmacological attenuation of p38 mitogen-activated protein kinase (p38-MAPK) in hESCs concomitantly augments some characteristics associated with pluripotency and the expressions of early lineage markers. Moreover, this blockage capacitates hESCs to differentiate towards an endoderm lineage at the expense of other lineages upon spontaneous hESC differentiation. Notably, hESCs pre-treated with p38-MAPK inhibitor exhibit significantly improved pancreatic progenitor directed differentiation. Together, our findings suggest a new approach to the robust endoderm differentiation of hESCs and potentially enables the facile derivation of various endoderm-derived lineages such as pancreatic cells.
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Affiliation(s)
- Adeleh Taei
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Developmental Biology, School of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran
| | - Azam Samadian
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Zahra Ghezel-Ayagh
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Sepideh Mollamohammadi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Sharif Moradi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Cancer Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Isar 11, 47138-18983, Babol, Iran
| | - Tahereh Kiani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Ehsan Janzamin
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Zahra Farzaneh
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Yaser Tahamtani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Developmental Biology, School of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran; Department of Diabetes, Obesity, and Metabolism, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Seyedeh-Nafiseh Hassani
- Department of Developmental Biology, School of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran.
| | - Hossein Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Developmental Biology, School of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran.
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2
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Mahaddalkar PU, Scheibner K, Pfluger S, Ansarullah, Sterr M, Beckenbauer J, Irmler M, Beckers J, Knöbel S, Lickert H. Generation of pancreatic β cells from CD177 + anterior definitive endoderm. Nat Biotechnol 2020; 38:1061-1072. [PMID: 32341565 DOI: 10.1038/s41587-020-0492-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 03/13/2020] [Indexed: 01/08/2023]
Abstract
Methods for differentiating human pluripotent stem cells to pancreatic and liver lineages in vitro have been limited by the inability to identify and isolate distinct endodermal subpopulations specific to these two organs. Here we report that pancreatic and hepatic progenitors can be isolated using the surface markers CD177/NB1 glycoprotein and inducible T-cell costimulatory ligand CD275/ICOSL, respectively, from seemingly homogeneous definitive endoderm derived from human pluripotent stem cells. Anterior definitive endoderm (ADE) subpopulations identified by CD177 and CD275 show inverse activation of canonical and noncanonical WNT signaling. CD177+ ADE expresses and synthesizes the secreted WNT, NODAL and BMP antagonist CERBERUS1 and is specified toward the pancreatic fate. CD275+ ADE receives canonical Wnt signaling and is specified toward the liver fate. Isolated CD177+ ADE differentiates more homogeneously into pancreatic progenitors and into more functionally mature and glucose-responsive β-like cells in vitro compared with cells from unsorted differentiation cultures.
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Affiliation(s)
- Pallavi U Mahaddalkar
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany.,Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Katharina Scheibner
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
| | - Sandra Pfluger
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
| | - Ansarullah
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
| | - Michael Sterr
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany.,Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Julia Beckenbauer
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany
| | - Martin Irmler
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Johannes Beckers
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany.,Chair of Experimental Genetics, School of Life Sciences Weihenstephan, Technische Universität München, Freising, Germany.,German Center for Diabetes Research (DZD), Neuherberg, Germany
| | | | - Heiko Lickert
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany. .,Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany. .,German Center for Diabetes Research (DZD), Neuherberg, Germany. .,β-Cell Biology, Technische Universität München, School of Medicine, Klinikum Rechts der Isar, Munich, Germany.
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3
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Ibarra-Soria X, Jawaid W, Pijuan-Sala B, Ladopoulos V, Scialdone A, Jörg DJ, Tyser RCV, Calero-Nieto FJ, Mulas C, Nichols J, Vallier L, Srinivas S, Simons BD, Göttgens B, Marioni JC. Defining murine organogenesis at single-cell resolution reveals a role for the leukotriene pathway in regulating blood progenitor formation. Nat Cell Biol 2018; 20:127-134. [PMID: 29311656 PMCID: PMC5787369 DOI: 10.1038/s41556-017-0013-z] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/21/2017] [Indexed: 02/02/2023]
Abstract
During gastrulation, cell types from all three germ layers are specified and the basic body plan is established 1 . However, molecular analysis of this key developmental stage has been hampered by limited cell numbers and a paucity of markers. Single-cell RNA sequencing circumvents these problems, but has so far been limited to specific organ systems 2 . Here, we report single-cell transcriptomic characterization of >20,000 cells immediately following gastrulation at E8.25 of mouse development. We identify 20 major cell types, which frequently contain substructure, including three distinct signatures in early foregut cells. Pseudo-space ordering of somitic progenitor cells identifies dynamic waves of transcription and candidate regulators, which are validated by molecular characterization of spatially resolved regions of the embryo. Within the endothelial population, cells that transition from haemogenic endothelial to erythro-myeloid progenitors specifically express Alox5 and its co-factor Alox5ap, which control leukotriene production. Functional assays using mouse embryonic stem cells demonstrate that leukotrienes promote haematopoietic progenitor cell generation. Thus, this comprehensive single-cell map can be exploited to reveal previously unrecognized pathways that contribute to tissue development.
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Affiliation(s)
- Ximena Ibarra-Soria
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Wajid Jawaid
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
- Department of Paediatric Surgery, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Blanca Pijuan-Sala
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Vasileios Ladopoulos
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Antonio Scialdone
- EMBL-European Bioinformatics Institute, Wellcome Genome Campus, Cambridge, UK
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Cambridge, UK
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, München, Germany
| | - David J Jörg
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
- The Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, UK
| | - Richard C V Tyser
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Fernando J Calero-Nieto
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Carla Mulas
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Jennifer Nichols
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Ludovic Vallier
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Cambridge, UK
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, Anne McLaren Laboratory, University of Cambridge, Cambridge, UK
- Department of Surgery, University of Cambridge, Cambridge, UK
| | - Shankar Srinivas
- Department of Physiology Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Benjamin D Simons
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
- Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK
- The Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, UK
| | - Berthold Göttgens
- Department of Haematology, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK.
- Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK.
| | - John C Marioni
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK.
- EMBL-European Bioinformatics Institute, Wellcome Genome Campus, Cambridge, UK.
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Cambridge, UK.
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4
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Kona SL, Shrestha A, Yi X, Joseph S, Barona HM, Martinez-Ceballos E. RARβ2-dependent signaling represses neuronal differentiation in mouse ES cells. Differentiation 2017; 98:55-61. [PMID: 29154149 PMCID: PMC5726922 DOI: 10.1016/j.diff.2017.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/30/2017] [Accepted: 11/08/2017] [Indexed: 01/03/2023]
Abstract
Embryonic Stem (ES) cells are pluripotent cells that can be induced to differentiate into cells of all three lineages: mesoderm, endoderm, and ectoderm. In culture, ES cells can be differentiated into mature neurons by treatment with Retinoic Acid (RA) and this effect is mediated mainly through the activation of the RA nuclear receptors (RAR α, β, and γ), and their isoforms. However, little is known about the role played by specific RAR types on ES cell differentiation. Here, we found that treatment of ES cells with AC55649, an RARβ2 agonist, increased endodermal marker gene expression. On the other hand, we found that the inhibition of RARβ with 5μM LE135, together with RA treatment, increased the efficiency of mouse ES cell differentiation into neurons by more than 4-fold as compared to cells treated with RA only. Finally, we performed proteomic analyses on ES cells treated with RA vs RA plus AC55649 in order to identify the signaling pathways activated by the RARβ agonist. Our proteomic analyses using antibody microarrays indicated that proteins such as p38 and AKT were upregulated in cells treated with RA plus the agonist, as compared to cells treated with RA alone. Our results indicate that RARβ may function as a repressor of neuronal differentiation through the activation of major cell signaling pathways, and that the pharmacological inhibition of this nuclear receptor may constitute a novel method to increase the efficiency of ES to neuronal differentiation in culture.
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Affiliation(s)
- Sri L Kona
- Department of Biological Sciences and Chemistry, Southern University and A&M College, Baton Rouge, LA 70813, USA
| | - Amita Shrestha
- Department of Biological Sciences and Chemistry, Southern University and A&M College, Baton Rouge, LA 70813, USA
| | - Xiaoping Yi
- Department of Biological Sciences and Chemistry, Southern University and A&M College, Baton Rouge, LA 70813, USA
| | - Serenthia Joseph
- Department of Biological Sciences and Chemistry, Southern University and A&M College, Baton Rouge, LA 70813, USA
| | - Humberto Munoz Barona
- Department of Physics and Mathematics, Southern University and A&M College, Baton Rouge, LA 70813, USA
| | - Eduardo Martinez-Ceballos
- Department of Biological Sciences and Chemistry, Southern University and A&M College, Baton Rouge, LA 70813, USA.
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Thamodaran V, Bruce AW. p38 (Mapk14/11) occupies a regulatory node governing entry into primitive endoderm differentiation during preimplantation mouse embryo development. Open Biol 2017; 6:rsob.160190. [PMID: 27605380 PMCID: PMC5043583 DOI: 10.1098/rsob.160190] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 08/12/2016] [Indexed: 12/31/2022] Open
Abstract
During mouse preimplantation embryo development, the classically described second cell-fate decision involves the specification and segregation, in blastocyst inner cell mass (ICM), of primitive endoderm (PrE) from pluripotent epiblast (EPI). The active role of fibroblast growth factor (Fgf) signalling during PrE differentiation, particularly in the context of Erk1/2 pathway activation, is well described. However, we report that p38 family mitogen-activated protein kinases (namely p38α/Mapk14 and p38β/Mapk11; referred to as p38-Mapk14/11) also participate in PrE formation. Specifically, functional p38-Mapk14/11 are required, during early-blastocyst maturation, to assist uncommitted ICM cells, expressing both EPI and earlier PrE markers, to fully commit to PrE differentiation. Moreover, functional activation of p38-Mapk14/11 is, as reported for Erk1/2, under the control of Fgf-receptor signalling, plus active Tak1 kinase (involved in non-canonical bone morphogenetic protein (Bmp)-receptor-mediated PrE differentiation). However, we demonstrate that the critical window of p38-Mapk14/11 activation precedes the E3.75 timepoint (defined by the initiation of the classical ‘salt and pepper’ expression pattern of mutually exclusive EPI and PrE markers), whereas appropriate lineage maturation is still achievable when Erk1/2 activity (via Mek1/2 inhibition) is limited to a period after E3.75. We propose that active p38-Mapk14/11 act as enablers, and Erk1/2 as drivers, of PrE differentiation during ICM lineage specification and segregation.
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Affiliation(s)
- Vasanth Thamodaran
- Laboratory of Developmental Biology and Genetics (LDB&G), Department of Molecular Biology, Faculty of Science, University of South Bohemia, Branišovská 31, 37005 České Budějovice, Czech Republic
| | - Alexander W Bruce
- Laboratory of Developmental Biology and Genetics (LDB&G), Department of Molecular Biology, Faculty of Science, University of South Bohemia, Branišovská 31, 37005 České Budějovice, Czech Republic Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 37005 České Budějovice, Czech Republic
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6
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Tan BSN, Kwek J, Wong CKE, Saner NJ, Yap C, Felquer F, Morris MB, Gardner DK, Rathjen PD, Rathjen J. Src Family Kinases and p38 Mitogen-Activated Protein Kinases Regulate Pluripotent Cell Differentiation in Culture. PLoS One 2016; 11:e0163244. [PMID: 27723793 PMCID: PMC5056717 DOI: 10.1371/journal.pone.0163244] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Accepted: 09/05/2016] [Indexed: 02/04/2023] Open
Abstract
Multiple pluripotent cell populations, which together comprise the pluripotent cell lineage, have been identified. The mechanisms that control the progression between these populations are still poorly understood. The formation of early primitive ectoderm-like (EPL) cells from mouse embryonic stem (mES) cells provides a model to understand how one such transition is regulated. EPL cells form from mES cells in response to l-proline uptake through the transporter Slc38a2. Using inhibitors of cell signaling we have shown that Src family kinases, p38 MAPK, ERK1/2 and GSK3β are required for the transition between mES and EPL cells. ERK1/2, c-Src and GSK3β are likely to be enforcing a receptive, primed state in mES cells, while Src family kinases and p38 MAPK are involved in the establishment of EPL cells. Inhibition of these pathways prevented the acquisition of most, but not all, features of EPL cells, suggesting that other pathways are required. L-proline activation of differentiation is mediated through metabolism and changes to intracellular metabolite levels, specifically reactive oxygen species. The implication of multiple signaling pathways in the process suggests a model in which the context of Src family kinase activation determines the outcomes of pluripotent cell differentiation.
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Affiliation(s)
- Boon Siang Nicholas Tan
- School of BioSciences, University of Melbourne, Parkville, Australia
- Stem Cells Australia, The University of Melbourne, Parkville, Australia
| | - Joly Kwek
- School of BioSciences, University of Melbourne, Parkville, Australia
- Australian Stem Cell Centre, Monash University, Clayton, Australia
| | - Chong Kum Edwin Wong
- School of BioSciences, University of Melbourne, Parkville, Australia
- Australian Stem Cell Centre, Monash University, Clayton, Australia
| | - Nicholas J. Saner
- Menzies Institute of Medical Research, University of Tasmania, Hobart, Australia
| | - Charlotte Yap
- School of BioSciences, University of Melbourne, Parkville, Australia
| | - Fernando Felquer
- Stem Cells Australia, The University of Melbourne, Parkville, Australia
- School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
| | - Michael B. Morris
- Australian Stem Cell Centre, Monash University, Clayton, Australia
- School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
| | - David K. Gardner
- School of BioSciences, University of Melbourne, Parkville, Australia
- Stem Cells Australia, The University of Melbourne, Parkville, Australia
| | - Peter D. Rathjen
- School of BioSciences, University of Melbourne, Parkville, Australia
- Australian Stem Cell Centre, Monash University, Clayton, Australia
- Menzies Institute of Medical Research, University of Tasmania, Hobart, Australia
- School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
| | - Joy Rathjen
- School of BioSciences, University of Melbourne, Parkville, Australia
- Stem Cells Australia, The University of Melbourne, Parkville, Australia
- Australian Stem Cell Centre, Monash University, Clayton, Australia
- School of Molecular and Biomedical Science, University of Adelaide, Adelaide, Australia
- School of Medicine, University of Tasmania, Hobart, Australia
- * E-mail:
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7
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Harvey AJ, Rathjen J, Gardner DK. Metaboloepigenetic Regulation of Pluripotent Stem Cells. Stem Cells Int 2015; 2016:1816525. [PMID: 26839556 PMCID: PMC4709785 DOI: 10.1155/2016/1816525] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 09/29/2015] [Indexed: 12/19/2022] Open
Abstract
The differentiation of pluripotent stem cells is associated with extensive changes in metabolism, as well as widespread remodeling of the epigenetic landscape. Epigenetic regulation is essential for the modulation of differentiation, being responsible for cell type specific gene expression patterns through the modification of DNA and histones, thereby establishing cell identity. Each cell type has its own idiosyncratic pattern regarding the use of specific metabolic pathways. Rather than simply being perceived as a means of generating ATP and building blocks for cell growth and division, cellular metabolism can directly influence cellular regulation and the epigenome. Consequently, the significance of nutrients and metabolites as regulators of differentiation is central to understanding how cells interact with their immediate environment. This review serves to integrate studies on pluripotent stem cell metabolism, and the regulation of DNA methylation and acetylation and identifies areas in which current knowledge is limited.
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Affiliation(s)
- Alexandra J. Harvey
- Stem Cells Australia, Parkville, VIC 3010, Australia
- School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Joy Rathjen
- Stem Cells Australia, Parkville, VIC 3010, Australia
- School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia
- School of Medicine, University of Tasmania, Hobart, TAS 7000, Australia
| | - David K. Gardner
- Stem Cells Australia, Parkville, VIC 3010, Australia
- School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia
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8
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A Modified Murine Embryonic Stem Cell Test for Evaluating the Teratogenic Effects of Drugs on Early Embryogenesis. PLoS One 2015; 10:e0145286. [PMID: 26682887 PMCID: PMC4686177 DOI: 10.1371/journal.pone.0145286] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 12/02/2015] [Indexed: 12/27/2022] Open
Abstract
Mammalian fetal development is easily disrupted by exogenous agents, making it essential to test new drug candidates for embryotoxicity and teratogenicity. To standardize the testing of drugs that might be used to treat pregnant women, the U.S. Food and Drug Administration (FDA) formulated special grade categories, labeled A, B, C, D and X, that define the level of risk associated with the use of a specific drug during pregnancy. Drugs in categories (Cat.) D and X are those with embryotoxic and/or teratogenic effects on humans and animals. However, which stages of pregnancy are affected by these agents and their molecular mechanisms are unknown. We describe here an embryonic stem cell test (EST) that classifies FDA pregnancy Cat.D and Cat.X drugs into 4 classes based on their differing effects on primitive streak formation. We show that ~84% of Cat.D and Cat.X drugs target this period of embryogenesis. Our results demonstrate that our modified EST can identify how a drug affects early embryogenesis, when it acts, and its molecular mechanism. Our test may thus be a useful addition to the drug safety testing armamentarium.
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9
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Goh HN, Rathjen PD, Familari M, Rathjen J. Endoderm complexity in the mouse gastrula is revealed through the expression of spink3. Biores Open Access 2014; 3:98-109. [PMID: 24940561 PMCID: PMC4048981 DOI: 10.1089/biores.2014.0010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Endoderm formation in the mammalian embryo occurs first in the blastocyst, when the primitive endoderm and pluripotent cells resolve into separate lineages, and again during gastrulation, when the definitive endoderm progenitor population emerges from the primitive streak. The formation of the definitive endoderm can be modeled using pluripotent cell differentiation in culture. The differentiation of early primitive ectoderm-like (EPL) cells, a pluripotent cell population formed from embryonic stem (ES) cells, was used to identify and characterize definitive endoderm formation. Expression of serine peptidase inhibitor, Kazal type 3 (Spink3) was detected in EPL cell–derived endoderm, and in a band of endoderm immediately distal to the embryonic–extra-embryonic boundary in pregastrula and gastrulating embryos. Later expression marked a region of endoderm separating the yolk sac from the developing gut. In the embryo, Spink3 expression marked a region of endoderm comprising the distal visceral endoderm, as determined by an endocytosis assay, and the proximal region of the definitive endoderm. This region was distinct from the more distal definitive endoderm population, marked by thyrotropin-releasing hormone (Trh). Endoderm expressing either Spink3 or Trh could be formed during EPL cell differentiation, and the prevalence of these populations could be influenced by culture medium and growth factor addition. Moreover, further differentiation suggested that the potential of these populations differed. These approaches have revealed an unexpected complexity in the definitive endoderm lineage, a complexity that will need to be accommodated in differentiation protocols to ensure the formation of the appropriate definitive endoderm progenitor in the future.
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Affiliation(s)
- Hwee Ngee Goh
- Department of Zoology, University of Melbourne , Victoria, Australia
| | - Peter D Rathjen
- The Menzies Research Institute Tasmania, University of Tasmania , Tasmania, Australia
| | - Mary Familari
- Department of Zoology, University of Melbourne , Victoria, Australia
| | - Joy Rathjen
- Department of Zoology, University of Melbourne , Victoria, Australia . ; The Menzies Research Institute Tasmania, University of Tasmania , Tasmania, Australia
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10
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Yap C, Goh HN, Familari M, Rathjen PD, Rathjen J. The formation of proximal and distal definitive endoderm populations in culture requires p38 MAPK activity. Development 2014. [DOI: 10.1242/dev.113191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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