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Sun Z, Zhang B, Zhou J, Luo Y, Zhu X, Wang Y, He Y, Zheng P, Zhang L, Yang J, Wang G. Integrated Single-Cell RNA-seq and ATAC-seq Reveals Heterogeneous Differentiation of CD4 + Naive T Cell Subsets is Associated with Response to Antidepressant Treatment in Major Depressive Disorder. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308393. [PMID: 38867657 PMCID: PMC11321657 DOI: 10.1002/advs.202308393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 05/08/2024] [Indexed: 06/14/2024]
Abstract
The mechanism involved in major depressive disorder (MDD) is well-studied but the mechanistic origin of the heterogeneous antidepressant effect remains largely unknown. Single-cell RNA-sequencing (scRNA-seq) and assay for transposase-accessible chromatin using sequencing (ATAC-seq) on peripheral blood mononuclear cells from 8 healthy individuals and 8 MDD patients before or after 12 weeks of antidepressant treatment is performed. scRNA-seq analysis reveals a lower proportion of naive T cells, particularly CD4+ naive T cells, in MDD patients compared to controls, and in nonresponders versus responders at the baseline. Flow cytometry data analysis of an independent cohort of 35 patients and 40 healthy individuals confirms the findings. Enrichment analysis of differentially expressed genes indicated obvious immune activation in responders. A specific activated CD4+ naive T population in responders characterized by enhanced mitogen-activated protein kinases (MAPK) pathway is identified. E-twenty six (ETS) is proposed as an upstream regulator of the MAPK pathway and heterogeneous differentiation in activated CD4+ naive T population is associated with the response to antidepressant treatment in MDD patients. A distinct immune feature manifested by CD4+ naive T cells during antidepressant treatment in MDD is identified. Collectively, this proposes the molecular mechanism that underlies the heterogeneous antidepressant outcomes for MDD.
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Affiliation(s)
- Zuoli Sun
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
| | - Bowen Zhang
- College of Life SciencesBeijing Normal UniversityBeijing100875China
| | - Jingjing Zhou
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
| | - Yanting Luo
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
| | - Xuequan Zhu
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
| | - Yaping Wang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
| | - Yi He
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
| | - Peng Zheng
- Department of NeurologyThe First Affiliated Hospital of Chongqing Medical UniversityChongqing400016China
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional DiseasesThe First Affiliated Hospital of Chongqing Medical UniversityChongqing400016China
| | - Ling Zhang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
| | - Jian Yang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
- Advanced Innovation Center for Human Brain ProtectionCapital Medical UniversityBeijing100069China
| | - Gang Wang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental DisordersBeijing Anding HospitalCapital Medical UniversityBeijing100088China
- Advanced Innovation Center for Human Brain ProtectionCapital Medical UniversityBeijing100069China
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Simon CS, Garg V, Kuo YY, Niakan KK, Hadjantonakis AK. ETV4 and ETV5 Orchestrate FGF-Mediated Lineage Specification and Epiblast Maturation during Early Mouse Development. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.24.604964. [PMID: 39091858 PMCID: PMC11291132 DOI: 10.1101/2024.07.24.604964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Cell fate decisions in early mammalian embryos are tightly regulated processes crucial for proper development. While FGF signaling plays key roles in early embryo patterning, its downstream effectors remain poorly understood. Our study demonstrates that the transcription factors Etv4 and Etv5 are critical mediators of FGF signaling in cell lineage specification and maturation in mouse embryos. We show that loss of Etv5 compromises primitive endoderm formation at pre-implantation stages. Furthermore, Etv4/5 deficiency delays naïve pluripotency exit and epiblast maturation, leading to elevated NANOG and reduced OTX2 expression within the blastocyst epiblast. As a consequence of delayed pluripotency progression, Etv4/5 deficient embryos exhibit anterior visceral endoderm migration defects post-implantation, a process essential for coordinated embryonic patterning and gastrulation initiation. Our results demonstrate the successive roles of these FGF signaling effectors in early lineage specification and embryonic body plan establishment, providing new insights into the molecular control of mammalian development.
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Affiliation(s)
- Claire S. Simon
- Developmental Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
- Human Embryo and Stem Cell Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
- The Centre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3EG, UK
| | - Vidur Garg
- Developmental Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Ying-Yi Kuo
- Developmental Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Kathy K. Niakan
- Human Embryo and Stem Cell Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK
- The Centre for Trophoblast Research, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 3EG, UK
- Wellcome Trust – Medical Research Council Stem Cell Institute, University of Cambridge, Jeffrey Cheah Biomedical Centre, Puddicombe Way, Cambridge CB2 0AW, UK
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, UK
| | - Anna-Katerina Hadjantonakis
- Developmental Biology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
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Carvalho S, Zea-Redondo L, Tang TCC, Stachel-Braum P, Miller D, Caldas P, Kukalev A, Diecke S, Grosswendt S, Grosso AR, Pombo A. SRRM2 splicing factor modulates cell fate in early development. Biol Open 2024; 13:bio060415. [PMID: 38656788 PMCID: PMC11070786 DOI: 10.1242/bio.060415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/26/2024] Open
Abstract
Embryo development is an orchestrated process that relies on tight regulation of gene expression to guide cell differentiation and fate decisions. The Srrm2 splicing factor has recently been implicated in developmental disorders and diseases, but its role in early mammalian development remains unexplored. Here, we show that Srrm2 dosage is critical for maintaining embryonic stem cell pluripotency and cell identity. Srrm2 heterozygosity promotes loss of stemness, characterised by the coexistence of cells expressing naive and formative pluripotency markers, together with extensive changes in gene expression, including genes regulated by serum-response transcription factor (SRF) and differentiation-related genes. Depletion of Srrm2 by RNA interference in embryonic stem cells shows that the earliest effects of Srrm2 heterozygosity are specific alternative splicing events on a small number of genes, followed by expression changes in metabolism and differentiation-related genes. Our findings unveil molecular and cellular roles of Srrm2 in stemness and lineage commitment, shedding light on the roles of splicing regulators in early embryogenesis, developmental diseases and tumorigenesis.
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Affiliation(s)
- Silvia Carvalho
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Institute for Medical Systems Biology (BIMSB), Epigenetic Regulation and Chromatin Structure Group, 10115 Berlin, Germany
- Associate Laboratory i4HB – Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO – Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, 4050-313 Porto, Portugal
- Graduate Program in Areas of Basic and Applied Biology (GABBA), ICBAS, University of Porto, 4050-313 Porto, Portugal
| | - Luna Zea-Redondo
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Institute for Medical Systems Biology (BIMSB), Epigenetic Regulation and Chromatin Structure Group, 10115 Berlin, Germany
- Humboldt-Universität zu Berlin, Institute of Biology, 10115 Berlin, Germany
| | - Tsz Ching Chloe Tang
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Institute for Medical Systems Biology (BIMSB), Epigenetic Regulation and Chromatin Structure Group, 10115 Berlin, Germany
| | - Philipp Stachel-Braum
- Humboldt-Universität zu Berlin, Institute of Biology, 10115 Berlin, Germany
- Berlin Institute of Health (BIH) at Charité – Universitätsmedizin Berlin, Exploratory Diagnostic Sciences (EDS) 10178 Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Institute for Medical Systems Biology (BIMSB), From Cell State to Function Group, 10115 Berlin, Germany
| | - Duncan Miller
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Pluripotent Stem Cells Platform, 13125 Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, 10785 Berlin, Germany
| | - Paulo Caldas
- Associate Laboratory i4HB – Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO – Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Alexander Kukalev
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Institute for Medical Systems Biology (BIMSB), Epigenetic Regulation and Chromatin Structure Group, 10115 Berlin, Germany
| | - Sebastian Diecke
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Pluripotent Stem Cells Platform, 13125 Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, 10785 Berlin, Germany
| | - Stefanie Grosswendt
- Berlin Institute of Health (BIH) at Charité – Universitätsmedizin Berlin, Exploratory Diagnostic Sciences (EDS) 10178 Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Institute for Medical Systems Biology (BIMSB), From Cell State to Function Group, 10115 Berlin, Germany
| | - Ana Rita Grosso
- Associate Laboratory i4HB – Institute for Health and Bioeconomy, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO – Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Ana Pombo
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin Institute for Medical Systems Biology (BIMSB), Epigenetic Regulation and Chromatin Structure Group, 10115 Berlin, Germany
- Humboldt-Universität zu Berlin, Institute of Biology, 10115 Berlin, Germany
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Díaz-López YE, Cázares-Domínguez V, Arenas-Huertero F, Gutierrez-Aguilar R. ETV5 Silencing Produces Mesenchymal to Epithelial Transition in INS-1 (832/13) Cell Line. Horm Metab Res 2024; 56:235-243. [PMID: 38335994 DOI: 10.1055/a-2246-4778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2024]
Abstract
ETV5 has been described to be involved in the epithelial to mesenchymal transition (EMT) mainly in cancer. It is known that EMT provokes cytoskeleton remodeling, improving cellular migratory, and invasive capabilities. Moreover, overexpression of ETV5 has been correlated to cancer development and this gene has been implicated in cell proliferation. However, little is known about the downregulation of ETV5 expression in a pancreatic cell line and the inverse mesenchymal to epithelial transition (MET). Therefore, we studied the implications of ETV5 silencing over the phenotype of the insulinoma INS-1 (832/13) cell line and described the MET by partial ETV5 silencing in the INS-1 (832/13) cell line. The downregulation of ETV5 expression was obtained by using ETV5 siRNA in the insulinoma rat cell line, INS-1 (832/13). Then, ETV5 knockdown provoked a MET phenotype observed by crystal violet staining and verified by immunohistochemistry against E-cadherin. Wound healing assay showed no migration, and F-actin stain revealed rearrangement of actin microfilaments. In addition, TGFβ1 and TGFβ3 were downregulated in the absence of ETV5. ETV5 silencing induces epithelial phenotype by downregulating TGFβ1 and TGFβ3 in INS-1 (832/13) cell line.
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Affiliation(s)
- Yael Efrén Díaz-López
- División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
- Laboratorio de Investigación en Enfermedades Metabólicas, Obesidad y Diabetes, Hospital Infantil de México Federico Gomez, Mexico City, Mexico
| | - Vicenta Cázares-Domínguez
- Laboratorio de Investigación en Enfermedades Metabólicas, Obesidad y Diabetes, Hospital Infantil de México Federico Gomez, Mexico City, Mexico
| | - Francisco Arenas-Huertero
- Laboratorio de Investigación en Patología Experimental, Hospital Infantil de México Federico Gómez, Mexico City, Mexico
| | - Ruth Gutierrez-Aguilar
- División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
- Laboratorio de Investigación en Enfermedades Metabólicas, Obesidad y Diabetes, Hospital Infantil de México Federico Gomez, Mexico City, Mexico
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Hutchings C, Nuriel Y, Lazar D, Kohl A, Muir E, Genin O, Cinnamon Y, Benyamini H, Nevo Y, Sela-Donenfeld D. Hindbrain boundaries as niches of neural progenitor and stem cells regulated by the extracellular matrix proteoglycan chondroitin sulphate. Development 2024; 151:dev201934. [PMID: 38251863 PMCID: PMC10911165 DOI: 10.1242/dev.201934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 01/12/2024] [Indexed: 01/23/2024]
Abstract
The interplay between neural progenitors and stem cells (NPSCs), and their extracellular matrix (ECM) is a crucial regulatory mechanism that determines their behavior. Nonetheless, how the ECM dictates the state of NPSCs remains elusive. The hindbrain is valuable to examine this relationship, as cells in the ventricular surface of hindbrain boundaries (HBs), which arise between any two neighboring rhombomeres, express the NPSC marker Sox2, while being surrounded with the membrane-bound ECM molecule chondroitin sulphate proteoglycan (CSPG), in chick and mouse embryos. CSPG expression was used to isolate HB Sox2+ cells for RNA-sequencing, revealing their distinguished molecular properties as typical NPSCs, which express known and newly identified genes relating to stem cells, cancer, the matrisome and cell cycle. In contrast, the CSPG- non-HB cells, displayed clear neural-differentiation transcriptome. To address whether CSPG is significant for hindbrain development, its expression was manipulated in vivo and in vitro. CSPG manipulations shifted the stem versus differentiation state of HB cells, evident by their behavior and altered gene expression. These results provide further understanding of the uniqueness of hindbrain boundaries as repetitive pools of NPSCs in-between the rapidly growing rhombomeres, which rely on their microenvironment to maintain their undifferentiated state during development.
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Affiliation(s)
- Carmel Hutchings
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agricultural, Food, and Environmental Sciences, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Yarden Nuriel
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agricultural, Food, and Environmental Sciences, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Daniel Lazar
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agricultural, Food, and Environmental Sciences, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Ayelet Kohl
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agricultural, Food, and Environmental Sciences, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
| | - Elizabeth Muir
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge CB2 1TN, UK
| | - Olga Genin
- Agricultural Research Organization, Volcani Center, Department of Poultry and Aquaculture Science, Rishon LeTsiyon 7505101, Israel
| | - Yuval Cinnamon
- Agricultural Research Organization, Volcani Center, Department of Poultry and Aquaculture Science, Rishon LeTsiyon 7505101, Israel
| | - Hadar Benyamini
- Info-CORE, Bioinformatics Unit of the I-CORE at the Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Yuval Nevo
- Info-CORE, Bioinformatics Unit of the I-CORE at the Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Dalit Sela-Donenfeld
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agricultural, Food, and Environmental Sciences, The Hebrew University of Jerusalem, Rehovot 7610001, Israel
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Silva DO, Fernandes Júnior GA, Fonseca LFS, Mota LFM, Bresolin T, Carvalheiro R, de Albuquerque LG. Genome-wide association study for stayability at different calvings in Nellore beef cattle. BMC Genomics 2024; 25:93. [PMID: 38254039 PMCID: PMC10804543 DOI: 10.1186/s12864-024-10020-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 01/16/2024] [Indexed: 01/24/2024] Open
Abstract
BACKGROUNDING Stayability, which may be defined as the probability of a cow remaining in the herd until a reference age or at a specific number of calvings, is usually measured late in the animal's life. Thus, if used as selection criteria, it will increase the generation interval and consequently might decrease the annual genetic gain. Measuring stayability at an earlier age could be a reasonable strategy to avoid this problem. In this sense, a better understanding of the genetic architecture of this trait at different ages and/or at different calvings is important. This study was conducted to identify possible regions with major effects on stayability measured considering different numbers of calvings in Nellore cattle as well as pathways that can be involved in its expression throughout the female's productive life. RESULTS The top 10 most important SNP windows explained, on average, 17.60% of the genetic additive variance for stayability, varying between 13.70% (at the eighth calving) and 21% (at the fifth calving). These SNP windows were located on 17 chromosomes (1, 2, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 27, and 28), and they harbored a total of 176 annotated genes. The functional analyses of these genes, in general, indicate that the expression of stayability from the second to the sixth calving is mainly affected by genetic factors related to reproductive performance, and nervous and immune systems. At the seventh and eighth calvings, genes and pathways related to animal health, such as density bone and cancer, might be more relevant. CONCLUSION Our results indicate that part of the target genomic regions in selecting for stayability at earlier ages (from the 2th to the 6th calving) would be different than selecting for this trait at later ages (7th and 8th calvings). While the expression of stayability at earlier ages appeared to be more influenced by genetic factors linked to reproductive performance together with an overall health/immunity, at later ages genetic factors related to an overall animal health gain relevance. These results support that selecting for stayability at earlier ages (perhaps at the second calving) could be applied, having practical implications in breeding programs since it could drastically reduce the generation interval, accelerating the genetic progress.
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Affiliation(s)
- Diogo Osmar Silva
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil.
| | - Gerardo Alves Fernandes Júnior
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Larissa Fernanda Simielli Fonseca
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Lúcio Flávio Macedo Mota
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Tiago Bresolin
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Roberto Carvalheiro
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil
| | - Lucia Galvão de Albuquerque
- Animal Science Department, School of Agricultural and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil.
- National Council for Scientific and Technological Development (CNPq), Brasília, Brazil.
- Present address: Departamento de Zootecnia, Via de acesso Paulo Donato Castellane s/n., São Paulo, Jaboticabal, CEP: 14884-900, Brazil.
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Schulz M, Teissandier A, De La Mata Santaella E, Armand M, Iranzo J, El Marjou F, Gestraud P, Walter M, Kinston S, Göttgens B, Greenberg MVC, Bourc'his D. DNA methylation restricts coordinated germline and neural fates in embryonic stem cell differentiation. Nat Struct Mol Biol 2024; 31:102-114. [PMID: 38177678 DOI: 10.1038/s41594-023-01162-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 10/26/2023] [Indexed: 01/06/2024]
Abstract
As embryonic stem cells (ESCs) transition from naive to primed pluripotency during early mammalian development, they acquire high DNA methylation levels. During this transition, the germline is specified and undergoes genome-wide DNA demethylation, while emergence of the three somatic germ layers is preceded by acquisition of somatic DNA methylation levels in the primed epiblast. DNA methylation is essential for embryogenesis, but the point at which it becomes critical during differentiation and whether all lineages equally depend on it is unclear. Here, using culture modeling of cellular transitions, we found that DNA methylation-free mouse ESCs with triple DNA methyltransferase knockout (TKO) progressed through the continuum of pluripotency states but demonstrated skewed differentiation abilities toward neural versus other somatic lineages. More saliently, TKO ESCs were fully competent for establishing primordial germ cell-like cells, even showing temporally extended and self-sustained capacity for the germline fate. By mapping chromatin states, we found that neural and germline lineages are linked by a similar enhancer dynamic upon exit from the naive state, defined by common sets of transcription factors, including methyl-sensitive ones, that fail to be decommissioned in the absence of DNA methylation. We propose that DNA methylation controls the temporality of a coordinated neural-germline axis of the preferred differentiation route during early development.
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Affiliation(s)
- Mathieu Schulz
- INSERM U934, CNRS UMR3215, Institut Curie, PSL Research University, Paris, France
| | - Aurélie Teissandier
- INSERM U934, CNRS UMR3215, Institut Curie, PSL Research University, Paris, France
| | | | - Mélanie Armand
- INSERM U934, CNRS UMR3215, Institut Curie, PSL Research University, Paris, France
| | - Julian Iranzo
- INSERM U934, CNRS UMR3215, Institut Curie, PSL Research University, Paris, France
| | - Fatima El Marjou
- INSERM U934, CNRS UMR3215, Institut Curie, PSL Research University, Paris, France
| | - Pierre Gestraud
- INSERM U900, MINES ParisTech, Institut Curie, PSL Research University, Paris, France
| | | | - Sarah Kinston
- Wellcome-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Berthold Göttgens
- Wellcome-MRC Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | | | - Deborah Bourc'his
- INSERM U934, CNRS UMR3215, Institut Curie, PSL Research University, Paris, France.
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Blücher RO, Lim RS, Jarred EG, Ritchie ME, Western PS. FGF-independent MEK1/2 signalling in the developing foetal testis is essential for male germline differentiation in mice. BMC Biol 2023; 21:281. [PMID: 38053127 PMCID: PMC10696798 DOI: 10.1186/s12915-023-01777-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 11/22/2023] [Indexed: 12/07/2023] Open
Abstract
BACKGROUND Disrupted germline differentiation or compromised testis development can lead to subfertility or infertility and are strongly associated with testis cancer in humans. In mice, SRY and SOX9 induce expression of Fgf9, which promotes Sertoli cell differentiation and testis development. FGF9 is also thought to promote male germline differentiation but the mechanism is unknown. FGFs typically signal through mitogen-activated protein kinases (MAPKs) to phosphorylate ERK1/2 (pERK1/2). We explored whether FGF9 regulates male germline development through MAPK by inhibiting either FGF or MEK1/2 signalling in the foetal testis immediately after gonadal sex determination and testis cord formation, but prior to male germline commitment. RESULTS pERK1/2 was detected in Sertoli cells and inhibition of MEK1/2 reduced Sertoli cell proliferation and organisation and resulted in some germ cells localised outside of the testis cords. While pERK1/2 was not detected in germ cells, inhibition of MEK1/2 after somatic sex determination profoundly disrupted germ cell mitotic arrest, dysregulated a broad range of male germline development genes and prevented the upregulation of key male germline markers, DPPA4 and DNMT3L. In contrast, while FGF inhibition reduced Sertoli cell proliferation, expression of male germline markers was unaffected and germ cells entered mitotic arrest normally. While male germline differentiation was not disrupted by FGF inhibition, a range of stem cell and cancer-associated genes were commonly altered after 24 h of FGF or MEK1/2 inhibition, including genes involved in the maintenance of germline stem cells, Nodal signalling, proliferation, and germline cancer. CONCLUSIONS Together, these data demonstrate a novel role for MEK1/2 signalling during testis development that is essential for male germline differentiation, but indicate a more limited role for FGF signalling. Our data indicate that additional ligands are likely to act through MEK1/2 to promote male germline differentiation and highlight a need for further mechanistic understanding of male germline development.
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Affiliation(s)
- Rheannon O Blücher
- Centre for Reproductive Health, Hudson Institute of Medical Research and Department of Molecular and Translational Science, Monash University, Clayton, VIC, 3168, Australia
| | - Rachel S Lim
- Epigenetics and Development Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Ellen G Jarred
- Centre for Reproductive Health, Hudson Institute of Medical Research and Department of Molecular and Translational Science, Monash University, Clayton, VIC, 3168, Australia
| | - Matthew E Ritchie
- Epigenetics and Development Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, 3052, Australia
| | - Patrick S Western
- Centre for Reproductive Health, Hudson Institute of Medical Research and Department of Molecular and Translational Science, Monash University, Clayton, VIC, 3168, Australia.
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9
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Díaz‐López YE, Pérez‐Figueroa GE, Cázares‐Domínguez V, Frigolet ME, Gutiérrez‐Aguilar R. ETV5 regulates proliferation and cell cycle genes in the INS-1 (832/13) cell line independently of the concentration of secreted insulin. FEBS Open Bio 2023; 13:2263-2272. [PMID: 37876309 PMCID: PMC10699097 DOI: 10.1002/2211-5463.13724] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 09/22/2023] [Accepted: 10/21/2023] [Indexed: 10/26/2023] Open
Abstract
The transcription factor E-twenty-six variant 5 (ETV5) regulates acute insulin secretion. Adequate insulin secretion is dependent on pancreatic β-cell size and cell proliferation, but the effects of ETV5 on proliferation, cell number, and viability, as well as its relationship with insulin secretion, have not been established yet. Here, we partially silenced ETV5 in the INS-1 (832/13) cell line by siRNA transfection and then measured secreted insulin concentration at different time points, observing similar levels to control cells. After 72 h of ETV5 silencing, we observed decreased cell number and proliferation, without any change in viability or apoptosis. Thus, partial silencing of ETV5 modulates cell proliferation in INS-1 (832/13) independently of secreted insulin levels via upregulation of E2F1 and of inhibitors of the cyclin/CDKs complexes (p21Cdkn1a , p27Cdkn1b , and p57Cdkn1c ) and downregulation of cell cycle activators (PAK3 and FOS).
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Affiliation(s)
- Yael E. Díaz‐López
- División de Investigación, Facultad de MedicinaUniversidad Nacional Autónoma de México (UNAM)México
- Laboratorio de Investigación en Enfermedades Metabólicas: Obesidad y DiabetesHospital Infantil de México “Federico Gómez”México
| | | | - Vicenta Cázares‐Domínguez
- Laboratorio de Investigación en Enfermedades Metabólicas: Obesidad y DiabetesHospital Infantil de México “Federico Gómez”México
| | - María E. Frigolet
- Laboratorio de Investigación en Enfermedades Metabólicas: Obesidad y DiabetesHospital Infantil de México “Federico Gómez”México
| | - Ruth Gutiérrez‐Aguilar
- División de Investigación, Facultad de MedicinaUniversidad Nacional Autónoma de México (UNAM)México
- Laboratorio de Investigación en Enfermedades Metabólicas: Obesidad y DiabetesHospital Infantil de México “Federico Gómez”México
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10
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Sharifi S, Pakdel A, Pakdel MH, Tabashiri R, Bakhtiarizadeh MR, Tahmasebi A. Integrated co-expression analysis of regulatory elements (miRNA, lncRNA, and TFs) in bovine monocytes induced by Str. uberis. Sci Rep 2023; 13:15076. [PMID: 37699972 PMCID: PMC10497586 DOI: 10.1038/s41598-023-42067-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 09/05/2023] [Indexed: 09/14/2023] Open
Abstract
Non-coding RNAs, including long non-coding RNAs (lncRNAs) and microRNAs (miRNAs), together with transcription factors, are critical pre-, co-, and post-transcriptional regulators. In addition to their criteria as ideal biomarkers, they have great potential in disease prognosis, diagnosis, and treatment of complex diseases. Investigation of regulatory mechanisms in the context of bovine mastitis, as most common and economic disease in the dairy industry, to identify elements influencing the expression of candidate genes as key regulators of the mammary immune response is not yet fully understood. Transcriptome profiles (50 RNA-Seq and 50 miRNA-Seq samples) of bovine monocytes induced by Str. uberis were used for co-expression module detection and preservation analysis using the weighted gene co-expression network analysis (WGCNA) approach. Assigned mi-, lnc-, and m-modules used to construct the integrated regulatory networks and miRNA-lncRNA-mRNA regulatory sub-networks. Remarkably, we have identified 18 miRNAs, five lncRNAs, and seven TFs as key regulators of str. uberis-induced mastitis. Most of the genes introduced here, mainly involved in immune response, inflammation, and apoptosis, were new to mastitis. These findings may help to further elucidate the underlying mechanisms of bovine mastitis, and the discovered genes may serve as signatures for early diagnosis and treatment of the disease.
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Affiliation(s)
- Somayeh Sharifi
- Department of Animal Science, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Islamic Republic of Iran.
| | - Abbas Pakdel
- Department of Animal Science, College of Agriculture, Isfahan University of Technology, Isfahan, 84156-83111, Islamic Republic of Iran.
| | - Mohammad Hossein Pakdel
- Department of Plant Molecular Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Islamic Republic of Iran
| | - Raana Tabashiri
- Agricultural Biotechnology Department, Faculty of Agriculture, Tarbiat Modares University, Tehran, Islamic Republic of Iran
| | - Mohammad Reza Bakhtiarizadeh
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Tehran, 3391653755, Islamic Republic of Iran
| | - Ahmad Tahmasebi
- Institute of Biotechnology, Shiraz University, Shiraz, 71946-84334, Islamic Republic of Iran
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11
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Shih HY, Chen HY, Huang YC, Yeh TH, Chen YC, Cheng YC. Etv5a Suppresses Neural Progenitor Cell Proliferation by Inhibiting sox2 Transcription. Stem Cells Dev 2023; 32:524-538. [PMID: 37358404 DOI: 10.1089/scd.2023.0005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023] Open
Abstract
Neural progenitor cells are self-renewable, proliferative, and multipotent cell populations that generate diverse types of neurons and glia to build the nervous system. Transcription factors play critical roles in regulating various cellular processes; however, the transcription factors that regulate the development of neural progenitors are yet to be identified. In the present study, we demonstrated that zebrafish etv5a is expressed in the neural progenitor cells of the neuroectoderm. Downregulation of endogenous Etv5a function by etv5a morpholino or an etv5a dominant-negative variant increased the proliferation of sox2-positive neural progenitor cells, accompanied by inhibition of neurogenesis and gliogenesis. These phenotypes in Etv5a-depleted embryos could be rescued by a co-injection with etv5a cRNA. Etv5a overexpression reduced sox2 expression. Direct binding of Etv5a to the regulatory elements of sox2 was affirmed by chromatin immunoprecipitation. These data revealed that Etv5a directly suppressed sox2 expression to reduce the proliferation of neural progenitor cells. In addition, the expression of foxm1, a putative target gene of Etv5a and a direct upstream transcription factor of sox2, was upregulated in Etv5a-deficient embryos. Moreover, the suppression of Foxm1 function by the foxm1 dominant-negative construct nullified the phenotype of upregulated sox2 expression caused by Etv5a deficiency. Overall, our results indicated that Etv5a regulates the expression of sox2 via direct binding to the sox2 promoter and indirect regulation by inhibiting foxm1 expression. Hence, we revealed the role of Etv5a in the transcriptional hierarchy that regulates the proliferation of neural progenitor cells.
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Affiliation(s)
- Hung-Yu Shih
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Department of Biological Sciences, College of Science, Engineering & Technology, Utah Tech University, St. George, Utah, USA
| | - Hao-Yuan Chen
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yin-Cheng Huang
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou Medical Center, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Tu-Hsueh Yeh
- Department of Neurology, Taipei Medical University Hospital, Taipei, Taiwan
- School of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yi-Chieh Chen
- Department of Neurology, Chang Gung Memorial Hospital at Linkou Medical Center, Taoyuan, Taiwan
- Neuroscience Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
| | - Yi-Chuan Cheng
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
- Neuroscience Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan
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12
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Flint AC, Mitchell DK, Angus SP, Smith AE, Bessler W, Jiang L, Mang H, Li X, Lu Q, Rodriguez B, Sandusky GE, Masters AR, Zhang C, Dang P, Koenig J, Johnson GL, Shen W, Liu J, Aggarwal A, Donoho GP, Willard MD, Bhagwat SV, Wade Clapp D, Rhodes SD. Combined CDK4/6 and ERK1/2 Inhibition Enhances Antitumor Activity in NF1-Associated Plexiform Neurofibroma. Clin Cancer Res 2023; 29:3438-3456. [PMID: 37406085 PMCID: PMC11060649 DOI: 10.1158/1078-0432.ccr-22-2854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 04/06/2023] [Accepted: 06/29/2023] [Indexed: 07/07/2023]
Abstract
PURPOSE Plexiform neurofibromas (PNF) are peripheral nerve sheath tumors that cause significant morbidity in persons with neurofibromatosis type 1 (NF1), yet treatment options remain limited. To identify novel therapeutic targets for PNF, we applied an integrated multi-omic approach to quantitatively profile kinome enrichment in a mouse model that has predicted therapeutic responses in clinical trials for NF1-associated PNF with high fidelity. EXPERIMENTAL DESIGN Utilizing RNA sequencing combined with chemical proteomic profiling of the functionally enriched kinome using multiplexed inhibitor beads coupled with mass spectrometry, we identified molecular signatures predictive of response to CDK4/6 and RAS/MAPK pathway inhibition in PNF. Informed by these results, we evaluated the efficacy of the CDK4/6 inhibitor, abemaciclib, and the ERK1/2 inhibitor, LY3214996, alone and in combination in reducing PNF tumor burden in Nf1flox/flox;PostnCre mice. RESULTS Converging signatures of CDK4/6 and RAS/MAPK pathway activation were identified within the transcriptome and kinome that were conserved in both murine and human PNF. We observed robust additivity of the CDK4/6 inhibitor, abemaciclib, in combination with the ERK1/2 inhibitor, LY3214996, in murine and human NF1(Nf1) mutant Schwann cells. Consistent with these findings, the combination of abemaciclib (CDK4/6i) and LY3214996 (ERK1/2i) synergized to suppress molecular signatures of MAPK activation and exhibited enhanced antitumor activity in Nf1flox/flox;PostnCre mice in vivo. CONCLUSIONS These findings provide rationale for the clinical translation of CDK4/6 inhibitors alone and in combination with therapies targeting the RAS/MAPK pathway for the treatment of PNF and other peripheral nerve sheath tumors in persons with NF1.
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Affiliation(s)
- Alyssa C. Flint
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Dana K. Mitchell
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Steven P. Angus
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Indiana University Melvin and Bren Simon Comprehensive Cancer Center
| | - Abbi E. Smith
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Waylan Bessler
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Li Jiang
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Henry Mang
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Xiaohong Li
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Qingbo Lu
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Brooke Rodriguez
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
| | - George E. Sandusky
- Department of Pathology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Andi R. Masters
- Clinical Pharmacology Analytical Core, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Chi Zhang
- Center for Computational Biology and Bioinformatics and Department of Medical and Molecular Genetics, Indiana University School of Medicine
| | - Pengtao Dang
- Center for Computational Biology and Bioinformatics and Department of Medical and Molecular Genetics, Indiana University School of Medicine
| | - Jenna Koenig
- Medical Scientist Training Program, Indiana University School of Medicine, Indianapolis, IN USA
| | - Gary L. Johnson
- Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Weihua Shen
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Jiangang Liu
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Amit Aggarwal
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Gregory P. Donoho
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Melinda D. Willard
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Shripad V. Bhagwat
- Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - D. Wade Clapp
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
- Indiana University Melvin and Bren Simon Comprehensive Cancer Center
| | - Steven D. Rhodes
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN, USA
- Indiana University Melvin and Bren Simon Comprehensive Cancer Center
- Division of Pediatric Hematology-Oncology, Indiana University School of Medicine, Indianapolis, IN, USA
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13
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Yu Q, Dai Q, Huang Z, Li C, Yan L, Fu X, Wang Q, Zhang Y, Cai L, Yang Z, Xiao R. Microfat exerts an anti-fibrotic effect on human hypertrophic scar via fetuin-A/ETV4 axis. J Transl Med 2023; 21:231. [PMID: 37004048 PMCID: PMC10064544 DOI: 10.1186/s12967-023-04065-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/17/2023] [Indexed: 04/03/2023] Open
Abstract
BACKGROUND Hypertrophic scar is a fibrotic disease following wound healing and is characterized by excessive extracellular matrix deposition. Autologous microfat grafting proves an effective strategy for the treatment thereof as it could improve the texture of scars and relieve relevant symptoms. This study aims to explore the potential mechanisms underlying the anti-fibrotic effect of microfat on hypertrophic scars. METHODS In this study, we injected microfat into transplanted hypertrophic scars in mouse models and investigated the subsequent histological changes and differential expression of mRNAs therein. As for in vitro studies, we co-cultured microfat and hypertrophic scar fibroblasts (HSFs) and analyzed molecular profile changes in HSFs co-cultured with microfat by RNA sequencing. Moreover, to identify the key transcription factors (TFs) which might be responsible for the anti-fibrotic function of microfat, we screened the differentially expressed TFs and transfected HSFs with lentivirus to overexpress or knockdown certain differentially expressed TFs. Furthermore, comparative secretome analyses were conducted to investigate the proteins secreted by co-cultured microfat; changes in gene expression of HSFs were examined after the administration of the potential anti-fibrotic protein. Finally, the relationship between the key TF in HSFs and the microfat-secreted anti-fibrotic adipokine was analyzed. RESULTS The anti-fibrotic effect of microfat was confirmed by in vivo transplanted hypertrophic scar models, as the number of α-SMA-positive myofibroblasts was decreased and the expression of fibrosis-related genes downregulated. Co-cultured microfat suppressed the extracellular matrix production of HSFs in in vitro experiment, and the transcription factor ETV4 was primarily differentially expressed in HSFs when compared with normal skin fibroblasts. Overexpression of ETV4 significantly decreased the expression of fibrosis-related genes in HSFs at both mRNA and protein levels. Fetuin-A secreted by microfat could also downregulate the expression of fibrosis-related genes in HSFs, partially through upregulating ETV4 expression. CONCLUSIONS Our results demonstrated that transcription factor ETV4 is essential for the anti-fibrotic effect of microfat on hypertrophic scars, and that fetuin-A secreted by microfat could suppress the fibrotic characteristic of HSFs through upregulating ETV4 expression. Microfat wields an alleviative influence over hypertrophic scars via fetuin-A/ETV4 axis.
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Affiliation(s)
- Qian Yu
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Qiang Dai
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Department of Burns and Plastic Surgery, Beijing Jishuitan Hospital, Beijing, People's Republic of China
| | - Zonglin Huang
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Chen Li
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Li Yan
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Xin Fu
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Qian Wang
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Yi Zhang
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Lei Cai
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China.
| | - Zhigang Yang
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China.
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
| | - Ran Xiao
- Research Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Ba-Da-Chu Road, Beijing, 100144, People's Republic of China.
- Key Laboratory of External Tissue and Organ Regeneration, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
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14
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Yu Y, Li X, Jiao R, Lu Y, Jiang X, Li X. H3K27me3-H3K4me1 transition at bivalent promoters instructs lineage specification in development. Cell Biosci 2023; 13:66. [PMID: 36991495 DOI: 10.1186/s13578-023-01017-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 03/20/2023] [Indexed: 03/31/2023] Open
Abstract
BACKGROUND Bivalent genes, of which promoters are marked by both H3K4me3 (trimethylation of histone H3 on lysine 4) and H3K27me3 (trimethylation of histone H3 on lysine 27), play critical roles in development and tumorigenesis. Monomethylation on lysine 4 of histone H3 (H3K4me1) is commonly associated with enhancers, but H3K4me1 is also present at promoter regions as an active bimodal or a repressed unimodal pattern. Whether the co-occurrence of H3K4me1 and bivalent marks at promoters plays regulatory role in development is largely unknown. RESULTS We report that in the process of lineage differentiation, bivalent promoters undergo H3K27me3-H3K4me1 transition, the loss of H3K27me3 accompanies by bimodal pattern loss or unimodal pattern enrichment of H3K4me1. More importantly, this transition regulates tissue-specific gene expression to orchestrate the development. Furthermore, knockout of Eed (Embryonic Ectoderm Development) or Suz12 (Suppressor of Zeste 12) in mESCs (mouse embryonic stem cells), the core components of Polycomb repressive complex 2 (PRC2) which catalyzes H3K27 trimethylation, generates an artificial H3K27me3-H3K4me1 transition at partial bivalent promoters, which leads to up-regulation of meso-endoderm related genes and down-regulation of ectoderm related genes, thus could explain the observed neural ectoderm differentiation failure upon retinoic acid (RA) induction. Finally, we find that lysine-specific demethylase 1 (LSD1) interacts with PRC2 and contributes to the H3K27me3-H3K4me1 transition in mESCs. CONCLUSIONS These findings suggest that H3K27me3-H3K4me1 transition plays a key role in lineage differentiation by regulating the expression of tissue specific genes, and H3K4me1 pattern in bivalent promoters could be modulated by LSD1 via interacting with PRC2.
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Affiliation(s)
- Yue Yu
- School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Xinjie Li
- School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Rui Jiao
- The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Yang Lu
- School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Xuan Jiang
- School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China.
| | - Xin Li
- School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China.
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China.
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15
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Wei Y, Han S, Wen J, Liao J, Liang J, Yu J, Chen X, Xiang S, Huang Z, Zhang B. E26 transformation-specific transcription variant 5 in development and cancer: modification, regulation and function. J Biomed Sci 2023; 30:17. [PMID: 36872348 PMCID: PMC9987099 DOI: 10.1186/s12929-023-00909-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 02/27/2023] [Indexed: 03/07/2023] Open
Abstract
E26 transformation-specific (ETS) transcription variant 5 (ETV5), also known as ETS-related molecule (ERM), exerts versatile functions in normal physiological processes, including branching morphogenesis, neural system development, fertility, embryonic development, immune regulation, and cell metabolism. In addition, ETV5 is repeatedly found to be overexpressed in multiple malignant tumors, where it is involved in cancer progression as an oncogenic transcription factor. Its roles in cancer metastasis, proliferation, oxidative stress response and drug resistance indicate that it is a potential prognostic biomarker, as well as a therapeutic target for cancer treatment. Post-translational modifications, gene fusion events, sophisticated cellular signaling crosstalk and non-coding RNAs contribute to the dysregulation and abnormal activities of ETV5. However, few studies to date systematically summarized the role and molecular mechanisms of ETV5 in benign diseases and in oncogenic progression. In this review, we specify the molecular structure and post-translational modifications of ETV5. In addition, its critical roles in benign and malignant diseases are summarized to draw a panorama for specialists and clinicians. The updated molecular mechanisms of ETV5 in cancer biology and tumor progression are delineated. Finally, we prospect the further direction of ETV5 research in oncology and its potential translational applications in the clinic.
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Affiliation(s)
- Yi Wei
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shenqi Han
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingyuan Wen
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingyu Liao
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Junnan Liang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jingjing Yu
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoping Chen
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China
- Key Laboratory of Organ Transplantation, National Health Commission, Wuhan, China
- Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, China
| | - Shuai Xiang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China.
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Zhao Huang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China.
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Bixiang Zhang
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China.
- Hubei Key Laboratory of Hepato-Pancreatic-Biliary Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Key Laboratory of Organ Transplantation, Ministry of Education, Wuhan, China.
- Key Laboratory of Organ Transplantation, National Health Commission, Wuhan, China.
- Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, China.
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16
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Shia DW, Choi W, Vijayaraj P, Vuong V, Sandlin JM, Lu MM, Aziz A, Marin C, Aros CJ, Sen C, Durra A, Lund AJ, Purkayastha A, Rickabaugh TM, Graeber TG, Gomperts BN. Targeting PEA3 transcription factors to mitigate small cell lung cancer progression. Oncogene 2023; 42:434-448. [PMID: 36509998 PMCID: PMC9898033 DOI: 10.1038/s41388-022-02558-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/16/2022] [Accepted: 11/21/2022] [Indexed: 12/15/2022]
Abstract
Small cell lung cancer (SCLC) remains a lethal disease with a dismal overall survival rate of 6% despite promising responses to upfront combination chemotherapy. The key drivers of such rapid mortality include early metastatic dissemination in the natural course of the disease and the near guaranteed emergence of chemoresistant disease. Here, we found that we could model the regression and relapse seen in clinical SCLC in vitro. We utilized time-course resolved RNA-sequencing to globally profile transcriptome changes as SCLC cells responded to a combination of cisplatin and etoposide-the standard-of-care in SCLC. Comparisons across time points demonstrated a distinct transient transcriptional state resembling embryonic diapause. Differential gene expression analysis revealed that expression of the PEA3 transcription factors ETV4 and ETV5 were transiently upregulated in the surviving fraction of cells which we determined to be necessary for efficient clonogenic expansion following chemotherapy. The FGFR-PEA3 signaling axis guided the identification of a pan-FGFR inhibitor demonstrating in vitro and in vivo efficacy in delaying progression following combination chemotherapy, observed inhibition of phosphorylation of the FGFR adaptor FRS2 and corresponding downstream MAPK and PI3K-Akt signaling pathways. Taken together, these data nominate PEA3 transcription factors as key mediators of relapse progression in SCLC and identify a clinically actionable small molecule candidate for delaying relapse of SCLC.
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Affiliation(s)
- David W Shia
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
- Department of Molecular Biology Interdepartmental Program, University of California, Los Angeles, CA, 90095, USA
- UCLA Medical Scientist Training Program, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - WooSuk Choi
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Preethi Vijayaraj
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Valarie Vuong
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Jenna M Sandlin
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Michelle M Lu
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Adam Aziz
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Caliope Marin
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Cody J Aros
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
- Department of Molecular Biology Interdepartmental Program, University of California, Los Angeles, CA, 90095, USA
- UCLA Medical Scientist Training Program, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Chandani Sen
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Abdo Durra
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Andrew J Lund
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
- Department of Molecular Biology Interdepartmental Program, University of California, Los Angeles, CA, 90095, USA
| | - Arunima Purkayastha
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Tammy M Rickabaugh
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA
| | - Thomas G Graeber
- Department of Molecular and Medical Pharmacology, Crump Institute for Molecular Imaging, University of California, Los Angeles, CA, 90095, USA
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA, 90095, USA
- Eli and Edythe Broad Stem Cell Research Center, University of California, Los Angeles, CA, 90095, USA
| | - Brigitte N Gomperts
- UCLA Children's Discovery and Innovation Institute, Mattel Children's Hospital UCLA, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA.
- Jonsson Comprehensive Cancer Center, University of California, Los Angeles, CA, 90095, USA.
- Eli and Edythe Broad Stem Cell Research Center, University of California, Los Angeles, CA, 90095, USA.
- Division of Pulmonary and Critical Care Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA, 90095, USA.
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17
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Ma J, Mahmud N, Bosland MC, Ross SR. DDX41 is needed for pre- and postnatal hematopoietic stem cell differentiation in mice. Stem Cell Reports 2022; 17:879-893. [PMID: 35303436 PMCID: PMC9023775 DOI: 10.1016/j.stemcr.2022.02.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 12/13/2022] Open
Abstract
DDX41 is a tumor suppressor frequently mutated in human myeloid neoplasms, but whether it affects hematopoiesis is unknown. Using a knockout mouse, we demonstrate that DDX41 is required for mouse hematopoietic stem and progenitor cell (HSPC) survival and differentiation, particularly of myeloid lineage cells. Transplantation of Ddx41 knockout fetal liver and adult bone marrow (BM) cells was unable to rescue mice from lethal irradiation, and knockout stem cells were also defective in colony formation assays. RNA-seq analysis of Lin-/cKit+/Sca1+Ddx41 knockout cells from fetal liver demonstrated that the expression of many genes associated with hematopoietic differentiation were altered. Furthermore, differential splicing of genes involved in key biological processes was observed. Our data reveal a critical role for DDX41 in HSPC differentiation and myeloid progenitor development, likely through regulating gene expression programs and splicing.
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Affiliation(s)
- Jing Ma
- Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, 835 South Wolcott Avenue, E705 MSB (MC 790), Chicago, IL 60612, USA
| | - Nadim Mahmud
- Department of Medicine, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Maarten C Bosland
- Department of Pathology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | - Susan R Ross
- Department of Microbiology and Immunology, University of Illinois at Chicago College of Medicine, 835 South Wolcott Avenue, E705 MSB (MC 790), Chicago, IL 60612, USA.
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18
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Martinez-Ara M, Comoglio F, van Arensbergen J, van Steensel B. Systematic analysis of intrinsic enhancer-promoter compatibility in the mouse genome. Mol Cell 2022; 82:2519-2531.e6. [PMID: 35594855 PMCID: PMC9278412 DOI: 10.1016/j.molcel.2022.04.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/17/2022] [Accepted: 04/05/2022] [Indexed: 12/12/2022]
Affiliation(s)
- Miguel Martinez-Ara
- Division of Gene Regulation and Oncode Institute, Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands
| | - Federico Comoglio
- Division of Gene Regulation and Oncode Institute, Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands
| | - Joris van Arensbergen
- Division of Gene Regulation and Oncode Institute, Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands
| | - Bas van Steensel
- Division of Gene Regulation and Oncode Institute, Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands.
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19
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Jiang W, Xu Y, Chen X, Pan S, Zhu X. E26 transformation-specific variant 4 as a tumor promotor in human cancers through specific molecular mechanisms. Mol Ther Oncolytics 2021; 22:518-527. [PMID: 34553037 PMCID: PMC8433062 DOI: 10.1016/j.omto.2021.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
E26 transformation-specific (ETS) variant 4 (ETV4) is an important transcription factor that belongs to the ETS transcription factor family and is essential for much cellular physiology. Recent evidence has revealed that ETV4 is aberrantly expressed in many types of tumors, and its overexpression is related to poor prognosis of cancer patients. Additionally, increasing studies have identified that ETV4 promotes cancer growth, invasion, metastasis, and drug resistance. Mechanistically, the level of ETV4 is regulated by some post-translation modulations in a broad spectrum of cancers. However, little progress has been made to comprehensively summarize the critical roles of ETV4 in different human cancers. Hence, this review mainly focuses on the physiological functions of ETV4 in various human tumors. In addition, the molecular mechanisms of ETV4-mediated cancer progression were elucidated, including how ETV4 modulates its downstream signaling pathways and how ETV4 is regulated by some factors. On this basis, the present review may provide a valuable therapeutics strategy for future cancer treatment by targeting ETV4-related pathways.
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Affiliation(s)
- Wenxiao Jiang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Yichi Xu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Xin Chen
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Shuya Pan
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Xueqiong Zhu
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China
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20
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Yang Y, Feng M, Bai L, Liao W, Zhou K, Zhang M, Wu Q, Wen F, Lei W, Zhang P, Zhang N, Huang J, Li Q. Comprehensive analysis of EMT-related genes and lncRNAs in the prognosis, immunity, and drug treatment of colorectal cancer. J Transl Med 2021; 19:391. [PMID: 34526059 PMCID: PMC8444417 DOI: 10.1186/s12967-021-03065-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 09/02/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND EMT is an important biological process in the mechanism of tumor invasion and metastasis. However, there are still many unknowns about the specific mechanism of EMT in tumor. At present, a comprehensive analysis of EMT-related genes in colorectal cancer (CRC) is still lacking. METHODS All the data were downloaded from public databases including TCGA database (488 tumor samples and 52 normal samples) as the training set and the GEO database (GSE40967 including 566 tumor samples and 19 normal samples, GSE12945 including 62 tumor samples, GSE17536 including 177 tumor samples, GSE17537 including 55 tumor samples) as the validation sets. One hundred and sixty-six EMT-related genes (EMT-RDGs) were selected from the Molecular Signatures Database. Bioinformatics methods were used to analyze the correlation between EMT-RDGs and CRC prognosis, metastasis, drug efficacy, and immunity. RESULTS We finally obtained nine prognostic-related EMT-RDGs (FGF8, NOG, PHLDB2, SIX2, SNAI1, TBX5, TIAM1, TWIST1, TCF15) through differential expression analysis, Unicox and Lasso regression analysis, and then constructed a risk prognosis model. There were significant differences in clinical characteristics, 22 immune cells, and immune functions between the high-risk and low-risk groups and the different states of the nine prognostic-related EMT-RDGs. The methylation level and mutation status of nine prognostic-related EMT-RDGs all affect their regulation of EMT. The Cox proportional hazards regression model was also constructed by the methylation sites of nine prognostic-related EMT-RDGs. In addition, the expression of FGF8, PHLDB2, SIX2, and SNAIL was higher and the expression level of NOG and TWIST1 was lower in the non-metastasis CRC group. Nine prognostic-related EMT-RDGs also affected the drug treatment response of CRC. CONCLUSIONS Targeting these nine prognostic-related EMT-RDGs can regulate CRC metastasis and immune, which is beneficial for the prognosis of CRC patients, improve drug sensitivity in CRC patients.
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Affiliation(s)
- Yang Yang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Mingyang Feng
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - LiangLiang Bai
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Weiting Liao
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Kexun Zhou
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Mengxi Zhang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Qiuji Wu
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Feng Wen
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Wanting Lei
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Pengfei Zhang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Nan Zhang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Jiaxing Huang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China
| | - Qiu Li
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China. .,West China Biomedical Big Data Center, Sichuan University, No. 37, GuoXue Xiang, Chengdu, Sichuan, China.
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21
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ETV4 promotes breast cancer cell stemness by activating glycolysis and CXCR4-mediated sonic Hedgehog signaling. Cell Death Discov 2021; 7:126. [PMID: 34052833 PMCID: PMC8164634 DOI: 10.1038/s41420-021-00508-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/12/2021] [Accepted: 04/28/2021] [Indexed: 12/16/2022] Open
Abstract
Cancer stem cells (CSCs) are a major cause of tumor treatment resistance, relapse and metastasis. Cancer cells exhibit reprogrammed metabolism characterized by aerobic glycolysis, which is also critical for sustaining cancer stemness. However, regulation of cancer cell metabolism rewiring and stemness is not completely understood. Here, we report that ETV4 is a key transcription factor in regulating glycolytic gene expression. ETV4 loss significantly inhibits the expression of HK2, LDHA as well as other glycolytic enzymes, reduces glucose uptake and lactate release in breast cancer cells. In human breast cancer and hepatocellular carcinoma tissues, ETV4 expression is positively correlated with glycolytic signaling. Moreover, we confirm that breast CSCs (BCSCs) are glycolysis-dependent and show that ETV4 is required for BCSC maintenance. ETV4 is enriched in BCSCs, its knockdown and overexpression suppresses and promotes breast cancer cell stem-like traits, respectively. Mechanistically, on the one hand, we find that ETV4 may enhance glycolysis activity to facilitate breast cancer stemness; on the other, ETV4 activates Sonic Hedgehog signaling by transcriptionally promoting CXCR4 expression. A xenograft assay validates the tumor growth-impeding effect and inhibition of CXCR4/SHH/GLI1 signaling cascade after ETV4 depletion. Together, our study highlights the potential roles of ETV4 in promoting cancer cell glycolytic shift and BCSC maintenance and reveals the molecular basis.
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22
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Sogut MS, Venugopal C, Kandemir B, Dag U, Mahendram S, Singh S, Gulfidan G, Arga KY, Yilmaz B, Kurnaz IA. ETS-Domain Transcription Factor Elk-1 Regulates Stemness Genes in Brain Tumors and CD133+ BrainTumor-Initiating Cells. J Pers Med 2021; 11:jpm11020125. [PMID: 33672811 PMCID: PMC7917801 DOI: 10.3390/jpm11020125] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/04/2021] [Accepted: 02/09/2021] [Indexed: 12/22/2022] Open
Abstract
Elk-1, a member of the ternary complex factors (TCFs) within the ETS (E26 transformation-specific) domain superfamily, is a transcription factor implicated in neuroprotection, neurodegeneration, and brain tumor proliferation. Except for known targets, c-fos and egr-1, few targets of Elk-1 have been identified. Interestingly, SMN, SOD1, and PSEN1 promoters were shown to be regulated by Elk-1. On the other hand, Elk-1 was shown to regulate the CD133 gene, which is highly expressed in brain-tumor-initiating cells (BTICs) and used as a marker for separating this cancer stem cell population. In this study, we have carried out microarray analysis in SH-SY5Y cells overexpressing Elk-1-VP16, which has revealed a large number of genes significantly regulated by Elk-1 that function in nervous system development, embryonic development, pluripotency, apoptosis, survival, and proliferation. Among these, we have shown that genes related to pluripotency, such as Sox2, Nanog, and Oct4, were indeed regulated by Elk-1, and in the context of brain tumors, we further showed that Elk-1 overexpression in CD133+ BTIC population results in the upregulation of these genes. When Elk-1 expression is silenced, the expression of these stemness genes is decreased. We propose that Elk-1 is a transcription factor upstream of these genes, regulating the self-renewal of CD133+ BTICs.
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Affiliation(s)
- Melis Savasan Sogut
- Institute of Biotechnology, Gebze Technical University, 41400 Kocaeli, Turkey; (M.S.S.); (B.K.)
- Molecular Neurobiology Laboratory (AxanLab), Department of Molecular Biology and Genetics, Gebze Technical University, 41400 Kocaeli, Turkey
- Biotechnology Graduate Program, Graduate School of Sciences, Yeditepe University, 26 Agustos Yerlesimi, Kayisdagi, 34755 Istanbul, Turkey;
| | - Chitra Venugopal
- Stem Cell and Cancer Research Institute, McMaster University, Hamilton, ON L8S 4K1, Canada; (C.V.); (S.M.); (S.S.)
| | - Basak Kandemir
- Institute of Biotechnology, Gebze Technical University, 41400 Kocaeli, Turkey; (M.S.S.); (B.K.)
- Molecular Neurobiology Laboratory (AxanLab), Department of Molecular Biology and Genetics, Gebze Technical University, 41400 Kocaeli, Turkey
- Biotechnology Graduate Program, Graduate School of Sciences, Yeditepe University, 26 Agustos Yerlesimi, Kayisdagi, 34755 Istanbul, Turkey;
| | - Ugur Dag
- Biotechnology Graduate Program, Graduate School of Sciences, Yeditepe University, 26 Agustos Yerlesimi, Kayisdagi, 34755 Istanbul, Turkey;
| | - Sujeivan Mahendram
- Stem Cell and Cancer Research Institute, McMaster University, Hamilton, ON L8S 4K1, Canada; (C.V.); (S.M.); (S.S.)
| | - Sheila Singh
- Stem Cell and Cancer Research Institute, McMaster University, Hamilton, ON L8S 4K1, Canada; (C.V.); (S.M.); (S.S.)
| | - Gizem Gulfidan
- Department of Bioengineering, Marmara University, 34722 Istanbul, Turkey; (G.G.); (K.Y.A.)
| | - Kazim Yalcin Arga
- Department of Bioengineering, Marmara University, 34722 Istanbul, Turkey; (G.G.); (K.Y.A.)
| | - Bayram Yilmaz
- Department of Physiology, Faculty of Medicine, Yeditepe University, 26 Agustos Yerlesimi, Kayisdagi, 34755 Istanbul, Turkey
- Correspondence: (B.Y.); (I.A.K.)
| | - Isil Aksan Kurnaz
- Institute of Biotechnology, Gebze Technical University, 41400 Kocaeli, Turkey; (M.S.S.); (B.K.)
- Molecular Neurobiology Laboratory (AxanLab), Department of Molecular Biology and Genetics, Gebze Technical University, 41400 Kocaeli, Turkey
- Correspondence: (B.Y.); (I.A.K.)
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23
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Dries R, Lange A, Heiny S, Berghaus KI, Bastmeyer M, Bentrop J. Cell Proliferation and Collective Cell Migration During Zebrafish Lateral Line System Development Are Regulated by Ncam/Fgf-Receptor Interactions. Front Cell Dev Biol 2021; 8:591011. [PMID: 33520983 PMCID: PMC7841142 DOI: 10.3389/fcell.2020.591011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 11/24/2020] [Indexed: 11/27/2022] Open
Abstract
The posterior lateral line system (pLLS) of aquatic animals comprises small clustered mechanosensory organs along the side of the animal. They develop from proneuromasts, which are deposited from a migratory primordium on its way to the tip of the tail. We here show, that the Neural Cell Adhesion Molecule Ncam1b is an integral part of the pathways initiating and regulating the development of the pLLS in zebrafish. We find that morpholino-knockdowns of ncam1b (i) reduce cell proliferation within the primordium, (ii) reduce the expression of Fgf target gene erm, (iii) severely affect proneuromast formation, and (iv) affect primordium migration. Ncam1b directly interacts with Fgf receptor Fgfr1a, and a knockdown of fgfr1a causes similar phenotypic changes as observed in ncam1b-morphants. We conclude that Ncam1b is involved in activating proliferation by triggering the expression of erm. In addition, we demonstrate that Ncam1b is required for the expression of chemokine receptor Cxcr7b, which is crucial for directed primordial migration. Finally, we show that the knockdown of ncam1b destabilizes proneuromasts, suggesting a further function of Ncam1b in strengthening the cohesion of proneuromast cells.
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Affiliation(s)
| | | | | | | | | | - Joachim Bentrop
- Zoological Institute, Cell- and Neurobiology, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
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24
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Ge W, Wang JJ, Zhang RQ, Tan SJ, Zhang FL, Liu WX, Li L, Sun XF, Cheng SF, Dyce PW, De Felici M, Shen W. Dissecting the initiation of female meiosis in the mouse at single-cell resolution. Cell Mol Life Sci 2021; 78:695-713. [PMID: 32367190 PMCID: PMC11072979 DOI: 10.1007/s00018-020-03533-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 03/22/2020] [Accepted: 04/17/2020] [Indexed: 01/22/2023]
Abstract
Meiosis is one of the most finely orchestrated events during gametogenesis with distinct developmental patterns in males and females. However, the molecular mechanisms involved in this process remain not well known. Here, we report detailed transcriptome analyses of cell populations present in the mouse female gonadal ridges (E11.5) and the embryonic ovaries from E12.5 to E14.5 using single-cell RNA sequencing (scRNA seq). These periods correspond with the initiation and progression of meiosis throughout the first stage of prophase I. We identified 13 transcriptionally distinct cell populations and 7 transcriptionally distinct germ cell subclusters that correspond to mitotic (3 clusters) and meiotic (4 clusters) germ cells. By analysing cluster-specific gene expression profiles, we found four cell clusters correspond to different cell stages en route to meiosis and characterized their detailed transcriptome dynamics. Our scRNA seq analysis here represents a new important resource for deciphering the molecular pathways driving female meiosis initiation.
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Affiliation(s)
- Wei Ge
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jun-Jie Wang
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Rui-Qian Zhang
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shao-Jing Tan
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Fa-Li Zhang
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Wen-Xiang Liu
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Lan Li
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xiao-Feng Sun
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shun-Feng Cheng
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Paul W Dyce
- Department of Animal Sciences, Auburn University, Auburn, AL, 36849, USA
| | - Massimo De Felici
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Wei Shen
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China.
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25
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Amniotic fluid mesenchymal stromal cells from early stages of embryonic development have higher self-renewal potential. In Vitro Cell Dev Biol Anim 2020; 56:701-714. [PMID: 33029689 DOI: 10.1007/s11626-020-00511-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/11/2020] [Indexed: 12/21/2022]
Abstract
Amniotic fluid (AF) is a rich source of mesenchymal stromal cells (MSCs) that have the ability to differentiate into multiple lineages rendering them a promising and powerful tool for regenerative medicine. However, information regarding the differences among AFMSCs derived from different gestational stages is limited. In the present study, AFMSCs derived from 125 pregnant rats at four embryonic day (E) stages (E12, E15, E18, and E21) were isolated and cultured. The primary E15 cells were the smallest in size and the easiest to culture and usually grew in a spherical shape that resembled the growth morphology of embryonic stem cells (ESCs). Once adhered, the E12 and E15 AFMSCs grew faster and could be passaged more than 60 times while still maintaining a continuous proliferative state; however, AFMSCs derived from E18 and E21 could normally be maintained for only 10 passages. To identify the possible reasons for this difference, RT-qPCR was used to examine several genes associated with self-renewal ability and cell origin. The Sox2 expression levels indicated that AFMSCs from E12 and E15 possessed stronger self-renewal capability. The K19, Col2A1, FGF5, AFP, and SPC expression levels indicated there were mixed-population cells co-existing in the AFMSC culture. In conclusion, E15 cells were easier to culture than E12 cells, could be passaged more often, and had a higher Sox2 expression than E18 or E21 cells. The E15-derived AFMSCs had higher viability and proliferative capacity than cells from the later stages. Therefore, AF cells from the early stages could be a good choice for exploring potential treatments involving AFMSCs.
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Liu Y, Zhang Y. ETV5 is Essential for Neuronal Differentiation of Human Neural Progenitor Cells by Repressing NEUROG2 Expression. Stem Cell Rev Rep 2020; 15:703-716. [PMID: 31273540 DOI: 10.1007/s12015-019-09904-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Neural progenitor cells (NPCs) are multipotent cells that have the potential to produce neurons and glial cells in the neural system. NPCs undergo identity maintenance or differentiation regulated by different kinds of transcription factors. Here we present evidence that ETV5, which is an ETS transcription factor, promotes the generation of glial cells and drives the neuronal subtype-specific genes in newly differentiated neurons from the human embryonic stem cells-derived NPCs. Next, we find a new role for ETV5 in the repression of NEUROG2 expression in NPCs. ETV5 represses NEUROG2 transcription via NEUROG2 promoter and requires the ETS domain. We identify ETV5 has the binding sites and is implicated in silent chromatin in NEUROG2 promoter by chromatin immunoprecipitation (ChIP) assays. Further, NEUROG2 transcription repression by ETV5 was shown to be dependent on a transcriptional corepressor (CoREST). During NPC differentiation toward neurons, ETV5 represses NEUROG2 expression and blocks the appearance of glutamatergic neurons. This finding suggests that ETV5 negatively regulates NEUROG2 expression and increases the number of GABAergic subtype neurons derived from NPCs. Thus, ETV5 represents a potent new candidate protein with benefits for the generation of GABAergic neurons.
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Affiliation(s)
- Yang Liu
- School of Medicine, Tongji University, No.1239, Siping Road, Shanghai, 200092, People's Republic of China.
| | - Yuanyuan Zhang
- School of Medicine, Tongji University, No.1239, Siping Road, Shanghai, 200092, People's Republic of China
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Meng D, Li Z, Ma X, Wu L, Fu L, Qin G. ETV5 overexpression contributes to tumor growth and progression of thyroid cancer through PIK3CA. Life Sci 2020; 253:117693. [PMID: 32325133 DOI: 10.1016/j.lfs.2020.117693] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/31/2020] [Accepted: 04/16/2020] [Indexed: 02/06/2023]
Abstract
AIMS Thyroid cancer is a common endocrine malignancy and sex hormone plays an important role in it. We have previously shown that activation of estrogen receptor (ER) α promotes thyroid cancer cell proliferation and invasion. Here, we attempted to investigate the role of ETS variant 5 (ETV5) on estrogen drived thyroid malignancy. MAIN METHODS Ten patients with follicular thyroid cancer were enrolled in this study. Cell proliferation and migration ability were analyzed by CCK-8 assay and cell migration assay, respectively. Chromatin immunoprecipitation-PCR and luciferase assay were conducted to analyze the relationship of ETV5 and PIK3CA. KEY FINDINGS ETV5 is highly expressed in thyroid tissues from patients with follicular thyroid cancer as well as in FTC133 cells. 17b-estradiol or overexpression of ERα induced an increase in ETV5 protein level in FTC133 cells. Knockdown of ETV5 inhibited FTC133 cell proliferation, migration, and epithelial-mesenchymal transition, while 17b-estradiol could not correct this effect. Additionally, the level of PIK3CA was markedly decreased in ETV5 knockdown cells and had a positive correlation with ETV5 in thyroid cancer patients. Chromatin immunoprecipitation-PCR analysis and luciferase assay confirmed that ETV5 directly targeted PIK3CA and that ETV5 was bound to the promoter region of PIK3CA. In addition, PIK3CA overexpression abrogated ETV5-induced cell growth, migration and epithelial-mesenchymal transition. SIGNIFICANCE ETV5 enhanced cell proliferation, migration, and epithelial-mesenchymal transition through the PIK3CA signaling pathway, indicating that ETV5 may be a therapeutic target in thyroid cancer.
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Affiliation(s)
- Dongdong Meng
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Zhifu Li
- Department of Orthopedic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Xiaojun Ma
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Lina Wu
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Lijun Fu
- Department of Thyroid Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Guijun Qin
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China.
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Daou R, Beißbarth T, Wingender E, Gültas M, Haubrock M. Constructing temporal regulatory cascades in the context of development and cell differentiation. PLoS One 2020; 15:e0231326. [PMID: 32275727 PMCID: PMC7147753 DOI: 10.1371/journal.pone.0231326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 03/20/2020] [Indexed: 12/02/2022] Open
Abstract
Cell differentiation is a complex process orchestrated by sets of regulators precisely appearing at certain time points, resulting in regulatory cascades that affect the expression of broader sets of genes, ending up in the formation of different tissues and organ parts. The identification of stage-specific master regulators and the mechanism by which they activate each other is a key to understanding and controlling differentiation, particularly in the fields of tissue regeneration and organoid engineering. Here we present a workflow that combines a comprehensive general regulatory network based on binding site predictions with user-provided temporal gene expression data, to generate a a temporally connected series of stage-specific regulatory networks, which we call a temporal regulatory cascade (TRC). A TRC identifies those regulators that are unique for each time point, resulting in a cascade that shows the emergence of these regulators and regulatory interactions across time. The model was implemented in the form of a user-friendly, visual web-tool, that requires no expert knowledge in programming or statistics, making it directly usable for life scientists. In addition to generating TRCs the tool links multiple interactive visual workflows, in which a user can track and investigate further different regulators, target genes, and interactions, directing the tool along the way into biologically sensible results based on the given dataset. We applied the TRC model on two different expression datasets, one based on experiments conducted on human induced pluripotent stem cells (hiPSCs) undergoing differentiation into mature cardiomyocytes and the other based on the differentiation of H1-derived human neuronal precursor cells. The model was successful in identifying previously known and new potential key regulators, in addition to the particular time points with which these regulators are associated, in cardiac and neural development.
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Affiliation(s)
- Rayan Daou
- Department of Medical Bioinformatics, University Medical Center Göttingen, Goettingen, Niedersachsen, Germany
| | - Tim Beißbarth
- Department of Medical Bioinformatics, University Medical Center Göttingen, Goettingen, Niedersachsen, Germany
| | - Edgar Wingender
- Department of Medical Bioinformatics, University Medical Center Göttingen, Goettingen, Niedersachsen, Germany
| | - Mehmet Gültas
- Breeding Informatics Group, Department of Animal Science, Georg-August University, Goettingen, Niedersachsen, Germany
- Center for Integrated Breeding Research (CiBreed), Georg-August University, Goettingen, Niedersachsen, Germany
| | - Martin Haubrock
- Department of Medical Bioinformatics, University Medical Center Göttingen, Goettingen, Niedersachsen, Germany
- * E-mail:
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Yoe J, Kim D, Kim S, Lee Y. Capicua restricts cancer stem cell-like properties in breast cancer cells. Oncogene 2020; 39:3489-3506. [PMID: 32108163 DOI: 10.1038/s41388-020-1230-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 02/14/2020] [Accepted: 02/17/2020] [Indexed: 12/27/2022]
Abstract
Cancer stem cells (CSCs) play a central role in cancer initiation, progression, therapeutic resistance, and recurrence in patients. Here we present Capicua (CIC), a developmental transcriptional repressor, as a suppressor of CSC properties in breast cancer cells. CIC deficiency critically enhances CSC self-renewal and multiple CSC subpopulations of breast cancer cells without altering their growth rate or invasiveness. Loss of CIC relieves repression of ETV4 and ETV5 expression, consequently promoting self-renewal capability, EpCAM+/CD44+/CD24low/- expression, and ALDH activity. In xenograft models, CIC deficiency significantly increases CSC frequency and drives tumor initiation through derepression of ETV4. Consistent with the experimental data, the CD44high/CD24low CSC-like feature is inversely correlated with CIC levels in breast cancer patients. We also identify SOX2 as a downstream target gene of CIC that partly promotes CSC properties. Taken together, our study demonstrates that CIC suppresses breast cancer formation via restricting cancer stemness and proposes CIC as a potential regulator of stem cell maintenance.
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Affiliation(s)
- Jeehyun Yoe
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Donghyo Kim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Sanguk Kim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.,Division of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Yoontae Lee
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea. .,Division of Integrative Bioscience and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.
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30
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Mus LM, Lambertz I, Claeys S, Kumps C, Van Loocke W, Van Neste C, Umapathy G, Vaapil M, Bartenhagen C, Laureys G, De Wever O, Bexell D, Fischer M, Hallberg B, Schulte J, De Wilde B, Durinck K, Denecker G, De Preter K, Speleman F. The ETS transcription factor ETV5 is a target of activated ALK in neuroblastoma contributing to increased tumour aggressiveness. Sci Rep 2020; 10:218. [PMID: 31937834 PMCID: PMC6959226 DOI: 10.1038/s41598-019-57076-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 12/05/2019] [Indexed: 02/08/2023] Open
Abstract
Neuroblastoma is an aggressive childhood cancer arising from sympatho-adrenergic neuronal progenitors. The low survival rates for high-risk disease point to an urgent need for novel targeted therapeutic approaches. Detailed molecular characterization of the neuroblastoma genomic landscape indicates that ALK-activating mutations are present in 10% of primary tumours. Together with other mutations causing RAS/MAPK pathway activation, ALK mutations are also enriched in relapsed cases and ALK activation was shown to accelerate MYCN-driven tumour formation through hitherto unknown ALK-driven target genes. To gain further insight into how ALK contributes to neuroblastoma aggressiveness, we searched for known oncogenes in our previously reported ALK-driven gene signature. We identified ETV5, a bona fide oncogene in prostate cancer, as robustly upregulated in neuroblastoma cells harbouring ALK mutations, and show high ETV5 levels downstream of the RAS/MAPK axis. Increased ETV5 expression significantly impacted migration, invasion and colony formation in vitro, and ETV5 knockdown reduced proliferation in a murine xenograft model. We also established a gene signature associated with ETV5 knockdown that correlates with poor patient survival. Taken together, our data highlight ETV5 as an intrinsic component of oncogenic ALK-driven signalling through the MAPK axis and propose that ETV5 upregulation in neuroblastoma may contribute to tumour aggressiveness.
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Affiliation(s)
- Liselot M Mus
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Irina Lambertz
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Shana Claeys
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Candy Kumps
- Department of Uro-gynaecology, Ghent University Hospital, Ghent, Belgium
| | - Wouter Van Loocke
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Christophe Van Neste
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Ganesh Umapathy
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Marica Vaapil
- Translational Cancer Research, Lund University, Lund, Sweden
| | - Christoph Bartenhagen
- Department of Experimental Pediatric Oncology, University Children's Hospital of Cologne, Medical Faculty, University of Cologne, 50937, Cologne, Germany.,Centre for Molecular Medicine Cologne (CMMC), University of Cologne, 50931, Cologne, Germany
| | - Genevieve Laureys
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Department of Paediatric Haematology and Oncology, Ghent University Hospital, Ghent, Belgium
| | - Olivier De Wever
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium.,Laboratory of Experimental Cancer Research, Ghent University, Ghent, Belgium
| | - Daniel Bexell
- Translational Cancer Research, Lund University, Lund, Sweden
| | - Matthias Fischer
- Department of Experimental Pediatric Oncology, University Children's Hospital of Cologne, Medical Faculty, University of Cologne, 50937, Cologne, Germany.,Centre for Molecular Medicine Cologne (CMMC), University of Cologne, 50931, Cologne, Germany
| | - Bengt Hallberg
- Department of Medical Biochemistry and Cell Biology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Johannes Schulte
- Department of Paediatric Oncology and Haematology, University Children's Hospital Essen, Essen, Germany.,Department of Paediatric Oncology and Haematology, Charité University Medical Centre Berlin, Berlin, Germany.,German Cancer Consortium (DKTK), Berlin, Germany.,German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Bram De Wilde
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium.,Department of Paediatric Haematology and Oncology, Ghent University Hospital, Ghent, Belgium
| | - Kaat Durinck
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Geertrui Denecker
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Katleen De Preter
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.,Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Frank Speleman
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium. .,Cancer Research Institute Ghent (CRIG), Ghent, Belgium.
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31
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In Silico Analysis of the Age-Dependent Evolution of the Transcriptome of Mouse Skin Stem Cells. Cells 2020; 9:cells9010165. [PMID: 31936599 PMCID: PMC7016981 DOI: 10.3390/cells9010165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/03/2020] [Accepted: 01/06/2020] [Indexed: 12/12/2022] Open
Abstract
The stem cells located in the hair follicle bulge area are critical for skin regeneration and repair. To date, little is known about the evolution of the transcriptome of these cells across time. Here, we have combined genome-wide expression analyses and a variety of in silico tools to determine the age-dependent evolution of the transcriptome of those cells. Our results reveal that the transcriptome of skin stem cells fluctuates extensively along the lifespan of mice. The use of both unbiased and pathway-centered in silico approaches has also enabled the identification of biological programs specifically regulated at those specific time-points. It has also unveiled hubs of highly transcriptionally interconnected genes and transcriptional factors potentially located at the core of those age-specific changes.
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32
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Tan J, Zou Y, Huang ZH, Zhang ZQ, Wu LP, Wu XW, Wan XJ, Xin CL, Wu QF. C-kit signaling promotes human pre-implantation 3PN embryonic development and blastocyst formation. Reprod Biol Endocrinol 2019; 17:75. [PMID: 31506068 PMCID: PMC6737624 DOI: 10.1186/s12958-019-0521-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 09/04/2019] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Although in vitro culture system has been optimized in the past few decades, the problem of few or no high quality embryos has been still not completely solved. Accordingly, fully understanding the regulatory mechanism of pre-implantation embryonic development would be beneficial to further optimize the in vitro embryo culture system. Recent studies have found the expression of c-kit in mouse embryo and its promotion effects on mouse embryonic development. However, it is unclear the expression, the role and the related molecular regulatory mechanism of c-kit in human pre-implantation embryo development. Therefore, the present study is to determine whether c-kit is expressed in human pre-implantation embryos, and to investigate the possible regulatory mechanism of c-kit signaling in the process of embryonic development. METHODS The present study includes human immature oocytes and three pronucleus (3PN) embryos collected from 768 women (28-32 ages) undergoing IVF, and normal 2PN embryos collected from ICR mice. Samples were distributed randomly into three different experimental groups: SCF group: G-1™ (medium for culture of embryos from the pro-nucleate stage to day 3) or G-2™ (medium for culture of embryos from day3 to blastocyst stage) + HSA (Human serum album) solution + rhSCF; SCF + imanitib (c-kit inhibitor) group: G-1™ or G-2™ + HSA solution + rhSCF + imanitib; SCF + U0126 (MEK/ERK inhibitor) group: G-1™ or G-2™ + HSA solution + rhSCF + U0126; Control group: G-1™ or G-2™ + HSA solution + PBS; The rate of good quality embryos at day 3, blastulation at day 6 and good quality blastulation at day 6 were analysis. RT-PCR, western blot and immunofluorescence staining were applied to detect the target genes and proteins in samples collected from human or mice, respectively. RESULTS c-kit was expressed ubiquitously in all human immature oocytes, 3PN embryos and 3PN blastocysts. In the experiment of human 3PN embryos, compared with other groups, SCF group showed obviously higher rate of good quality at day 3, better rate of blastocyst formation at day 6 and higher rate of good quality blastocyst formation at day 6. Furthermore, we observed a higher ETV5 expression in SCF group than that in other groups. Similar results were also found in animal experiment. Interestingly, we also found a higher phosphorylation level of MEK/ERK signal molecule in mice embryos from SCF group than those from other groups. Moreover, inhibition of MEK/ERK signaling would remarkably impeded the mice embryonic development, which might be due to the reduced ETV5 expression. CONCLUSIONS The present study firstly revealed that c-kit signaling might promote the human pre-implantation embryonic development and blastocyst formation by up-regulating the expression of ETV5 via MEK/ERK pathway. Our findings provide a new idea for optimizing the in vitro embryo culture condition during ART program, which is beneficial to obtain high quality embryos for infertile patients.
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Affiliation(s)
- Jun Tan
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Yang Zou
- Key Laboratory of Women's Reproductive Health of Jiangxi Province, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Zhi-Hui Huang
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Zhi-Qin Zhang
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Li-Ping Wu
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Xing-Wu Wu
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Xiao-Ju Wan
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Cai-Lin Xin
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China
| | - Qiong-Fang Wu
- Reproductive Medicine Center, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang, Jiangxi, 330006, People's Republic of China.
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Hamada H, Yamamura M, Ohi H, Kobayashi Y, Niwa K, Oyama T, Mano Y, Asai M, Tanuma SI, Uchiumi F. Characterization of the human zinc finger nfx‑1‑type containing 1 encoding ZNFX1 gene and its response to 12‑O‑tetradecanoyl‑13‑acetate in HL‑60 cells. Int J Oncol 2019; 55:896-904. [PMID: 31432148 DOI: 10.3892/ijo.2019.4860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/19/2019] [Indexed: 11/06/2022] Open
Abstract
Human promyelocytic HL‑60 cells can be differentiated into macrophage‑like cells by treatment with 12‑O‑tetra decanoylphorbol‑13‑acetate (TPA). Certain 5' upstream regions of the zinc finger protein (ZNF)‑encoding genes contain duplicated GGAA motifs, which are frequently found in the TPA‑responding gene promoter regions. To examine transcriptional responses to TPA, 5'flanking regions of human zinc finger CCCH‑type containing, antiviral, ZNF252, ZNF343, ZNF555, ZNF782 and zinc finger nfx‑1‑type containing 1 (ZNFX1) genes were isolated by polymerase chain reaction (PCR) and ligated into a multiple‑cloning site of the pGL4.10[luc2] vector. Transient transfection and a luciferase assay revealed that the ZNFX1 promoter most prominently responded to the TPA treatment. Deletion and point mutation experiments indicated that the duplicated GGAA motif in the 100‑bp region positively responded to TPA. In addition, reverse transcription‑quantitative PCR and western blotting showed that the mRNA and protein of ZNFX1 accumulate during the differentiation of HL‑60 cells. These results indicated that expression of the TPA‑inducible ZNFX1 gene, which belongs to the group of interferon‑responsive genes, is regulated by the cis‑action of the duplicated GGAA motif.
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Affiliation(s)
- Hiroshi Hamada
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Mayu Yamamura
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Hiroto Ohi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Yota Kobayashi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Kuniyoshi Niwa
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Takahiro Oyama
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Yasunari Mano
- Department of Clinical Drug Informatics, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Masashi Asai
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Sei-Ichi Tanuma
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Fumiaki Uchiumi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
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Regulatory mechanisms of Robo4 and their effects on angiogenesis. Biosci Rep 2019; 39:BSR20190513. [PMID: 31160487 PMCID: PMC6620384 DOI: 10.1042/bsr20190513] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 12/13/2022] Open
Abstract
Roundabout4 (Robo4) is a transmembrane receptor that belongs to the Roundabout (Robo) family of axon guidance molecules. Robo4 is an endothelial-specific receptor that participates in endothelial cell migration, proliferation, and angiogenesis and the maintenance of vasculature homeostasis. The purpose of this review is to summarize and analyze three main mechanisms related to the expression and function of Robo4 during developmental and pathological angiogenesis. In this review, static shear stress and the binding of transcription factors such as E26 transformation-specific variant 2 (ETV2) and Slit3 induce Robo4 expression and activate Robo4 during tissue and organ development. Robo4 interacts with Slit2 or UNC5B to maintain vascular integrity, while a disturbed flow and the expression of transcription factors in inflammatory or neoplastic environments alter Robo4 expression levels, although these changes have uncertain functions. Based on the mechanisms described above, we discuss the aberrant expression of Robo4 in angiogenesis-related diseases and propose antiangiogenic therapies targeting the Robo4 signaling pathway for the treatment of ocular neovascularization lesions and tumors. Finally, although many problems related to Robo4 signaling pathways remain to be resolved, Robo4 is a promising and potentially valuable therapeutic target for treating pathological angiogenesis and developmental defects in angiogenesis.
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35
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Complementary Activity of ETV5, RBPJ, and TCF3 Drives Formative Transition from Naive Pluripotency. Cell Stem Cell 2019; 24:785-801.e7. [PMID: 31031137 PMCID: PMC6509416 DOI: 10.1016/j.stem.2019.03.017] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 11/01/2018] [Accepted: 03/21/2019] [Indexed: 02/02/2023]
Abstract
The gene regulatory network (GRN) of naive mouse embryonic stem cells (ESCs) must be reconfigured to enable lineage commitment. TCF3 sanctions rewiring by suppressing components of the ESC transcription factor circuitry. However, TCF3 depletion only delays and does not prevent transition to formative pluripotency. Here, we delineate additional contributions of the ETS-family transcription factor ETV5 and the repressor RBPJ. In response to ERK signaling, ETV5 switches activity from supporting self-renewal and undergoes genome relocation linked to commissioning of enhancers activated in formative epiblast. Independent upregulation of RBPJ prevents re-expression of potent naive factors, TBX3 and NANOG, to secure exit from the naive state. Triple deletion of Etv5, Rbpj, and Tcf3 disables ESCs, such that they remain largely undifferentiated and locked in self-renewal, even in the presence of differentiation stimuli. Thus, genetic elimination of three complementary drivers of network transition stalls developmental progression, emulating environmental insulation by small-molecule inhibitors.
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Chang S, Lu X, Wang S, Wang Z, Huo J, Huang J, Shangguan S, Li S, Zou J, Bao Y, Guo J, Wang F, Niu B, Zhang T, Qiu Z, Wu J, Wang L. The effect of folic acid deficiency on FGF pathway via Brachyury regulation in neural tube defects. FASEB J 2018; 33:4688-4702. [PMID: 30592646 DOI: 10.1096/fj.201801536r] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Folate deficiency in early development leads to disturbance in multiple processes, including neurogenesis during which fibroblast growth factor (FGF) pathway is one of the crucial pathways. Whether folic acid (FA) directly affects FGF pathways to influence neurodevelopment and the possible mechanism remains unclear. In this study, we presented evidence that in human FA-insufficient encephalocele, the FGF pathway was interfered. Furthermore, in Brachyury knockout mice devoid of such T-box transcription factors regulating embryonic neuromesodermal bipotency and a key component of FGF pathway, change in expression of Brachyury downstream targets, activator Fgf8 and suppressor dual specificity phosphatase 6 was detected, along with the reduction in expression of other key FGF pathway genes. By using a FA-deficient cell model, we further demonstrated that decrease in Brachyury expression was through alteration in hypermethylation at the Brachyury promoter region under FA deficiency conditions, and suppression of Brachyury promoted the inactivation of the FGF pathway. Correspondingly, FA supplementation partially reverses the effects seen in FA-deficient embryoid bodies. Lastly, in mice with maternal folate-deficient diets, aberrant FGF pathway activity was found in fetal brain dysplasia. Taken together, our findings highlight the effect of FA on FGF pathways during neurogenesis, and the mechanism may be due to the low expression of Brachyury gene via hypermethylation under FA-insufficient conditions.-Chang, S., Lu, X., Wang, S., Wang, Z., Huo, J., Huang, J., Shangguan, S., Li, S., Zou, J., Bao, Y., Guo, J., Wang, F., Niu, B., Zhang, T., Qiu, Z., Wu, J., Wang, L. The effect of folic acid deficiency on FGF pathway via Brachyury regulation in neural tube defects.
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Affiliation(s)
- Shaoyan Chang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xiaolin Lu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Shan Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Zhigang Wang
- Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Junsheng Huo
- Key Laboratory of Trace Element Nutrition of National Health and Family Planning Commission of the People's Republic of China, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China; and
| | - Jian Huang
- Key Laboratory of Trace Element Nutrition of National Health and Family Planning Commission of the People's Republic of China, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China; and
| | - Shaofang Shangguan
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Shen Li
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Jizhen Zou
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Yihua Bao
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Jin Guo
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Fang Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Bo Niu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Ting Zhang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Zhiyong Qiu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Jianxin Wu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Li Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
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Boroviak T, Stirparo GG, Dietmann S, Hernando-Herraez I, Mohammed H, Reik W, Smith A, Sasaki E, Nichols J, Bertone P. Single cell transcriptome analysis of human, marmoset and mouse embryos reveals common and divergent features of preimplantation development. Development 2018; 145:145/21/dev167833. [PMID: 30413530 PMCID: PMC6240320 DOI: 10.1242/dev.167833] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 10/04/2018] [Indexed: 12/12/2022]
Abstract
The mouse embryo is the canonical model for mammalian preimplantation development. Recent advances in single cell profiling allow detailed analysis of embryogenesis in other eutherian species, including human, to distinguish conserved from divergent regulatory programs and signalling pathways in the rodent paradigm. Here, we identify and compare transcriptional features of human, marmoset and mouse embryos by single cell RNA-seq. Zygotic genome activation correlates with the presence of polycomb repressive complexes in all three species, while ribosome biogenesis emerges as a predominant attribute in primate embryos, supporting prolonged translation of maternally deposited RNAs. We find that transposable element expression signatures are species, stage and lineage specific. The pluripotency network in the primate epiblast lacks certain regulators that are operative in mouse, but encompasses WNT components and genes associated with trophoblast specification. Sequential activation of GATA6, SOX17 and GATA4 markers of primitive endoderm identity is conserved in primates. Unexpectedly, OTX2 is also associated with primitive endoderm specification in human and non-human primate blastocysts. Our cross-species analysis demarcates both conserved and primate-specific features of preimplantation development, and underscores the molecular adaptability of early mammalian embryogenesis. Highlighted Article: Analysis of stage-matched, single-cell gene expression data from three mammalian species reveals conserved and primate-specific regulation of early embryogenesis and lineage specification.
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Affiliation(s)
- Thorsten Boroviak
- Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK.,Department of Physiology, Development and Neuroscience, University of Cambridge, Tennis Court Road, Cambridge CB2 3EG, UK
| | - Giuliano G Stirparo
- Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Sabine Dietmann
- Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK
| | | | - Hisham Mohammed
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, UK
| | - Wolf Reik
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, UK
| | - Austin Smith
- Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK.,Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1GA, UK
| | - Erika Sasaki
- Central Institute for Experimental Animals, Department of Applied Developmental Biology, 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Jennifer Nichols
- Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK.,Department of Physiology, Development and Neuroscience, University of Cambridge, Tennis Court Road, Cambridge CB2 3EG, UK
| | - Paul Bertone
- Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, UK
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The Transcription Factor ETV5 Mediates BRAFV600E-Induced Proliferation and TWIST1 Expression in Papillary Thyroid Cancer Cells. Neoplasia 2018; 20:1121-1134. [PMID: 30265861 PMCID: PMC6161370 DOI: 10.1016/j.neo.2018.09.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/08/2018] [Accepted: 09/08/2018] [Indexed: 12/17/2022] Open
Abstract
The ETS family of transcription factors is involved in several normal remodeling events and pathological processes including tumor progression. ETS transcription factors are divided into subfamilies based on the sequence and location of the ETS domain. ETV5 (Ets variant gene 5; also known as ERM) is a member of the PEA3 subfamily. Our meta-analysis of normal, benign, and malignant thyroid samples demonstrated that ETV5 expression is upregulated in papillary thyroid cancer and was predominantly associated with BRAF V600E or RAS mutations. However, the precise role of ETV5 in these lesions is unknown. In this study, we used the KTC1 cell line as a model for human advanced papillary thyroid cancer (PTC) because the cells harbor the heterozygous BRAF (V600E) mutation together with the C250T TERT promoter mutation. The role of ETV5 in PTC proliferation was tested using RNAi followed by high-throughput screening. Signaling pathways driving ETV5 expression were identified using specific pharmacological inhibitors. To determine if ETV5 influences the expression of epithelial-to-mesenchymal (EMT) markers in these cells, an EMT PCR array was used, and data were confirmed by qPCR and ChIP-qPCR. We found that ETV5 is critical for PTC cell growth, is expressed downstream of the MAPK pathway, and directly upregulates the transcription factor TWIST1, a known marker of intravasation and metastasis. Increased ETV5 expression could therefore be considered as a marker for advanced PTCs and a possible future therapeutic target.
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Xie H, Zhang E, Hong N, Fu Q, Li F, Chen S, Yu Y, Sun K. Identification of TBX2 and TBX3 variants in patients with conotruncal heart defects by target sequencing. Hum Genomics 2018; 12:44. [PMID: 30223900 PMCID: PMC6142335 DOI: 10.1186/s40246-018-0176-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 09/07/2018] [Indexed: 12/13/2022] Open
Abstract
Background Conotruncal heart defects (CTDs) are heterogeneous congenital heart malformations that result from outflow tract dysplasia; however, the genetic determinants underlying CTDs remain unclear. Increasing evidence demonstrates that dysfunctional TBX2 and TBX3 result in outflow tract malformations, implying that both of them are involved in CTD pathogenesis. We screened for TBX2 and TBX3 variants in a large cohort of CTD patients (n = 588) and population-matched healthy controls (n = 300) by target sequencing and genetically analyzed the expression and function of these variants. Results The probably damaging variants p.R608W, p.T249I, and p.R616Q of TBX2 and p.A192T, p.M65L, and p.A562V of TBX3 were identified in CTD patients, but none in controls. All altered amino acids were highly conserved evolutionarily. Moreover, our data suggested that mRNA and protein expressions of TBX2 and TBX3 variants were altered compared with those of the wild-type. We screened PEA3 and MEF2C as novel downstream genes of TBX2 and TBX3, respectively. Functional analysis revealed that TBX2R608W and TBX2R616Q variant proteins further activated HAS2 promoter but failed to activate PEA3 promoter and that TBX3A192T and TBX3A562V variant proteins showed a reduced transcriptional activity over MEF2C promoter. Conclusions Our results indicate that the R608W and R616Q variants of TBX2 as well as the A192T and A562V variants of TBX3 contribute to CTD etiology; this was the first association of variants of TBX2 and TBX3 to CTDs based on a large population. Electronic supplementary material The online version of this article (10.1186/s40246-018-0176-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Huilin Xie
- Department of Pediatric Cardiovascular, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China
| | - Erge Zhang
- Department of Pediatric Cardiovascular, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China
| | - Nanchao Hong
- Department of Pediatric Cardiovascular, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China
| | - Qihua Fu
- Medical Laboratory, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Fen Li
- Department of Pediatric Cardiology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Sun Chen
- Department of Pediatric Cardiovascular, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China
| | - Yu Yu
- Department of Pediatric Cardiovascular, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China.
| | - Kun Sun
- Department of Pediatric Cardiovascular, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, China.
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Klein RH, Tung PY, Somanath P, Fehling HJ, Knoepfler PS. Genomic functions of developmental pluripotency associated factor 4 (Dppa4) in pluripotent stem cells and cancer. Stem Cell Res 2018; 31:83-94. [PMID: 30031967 PMCID: PMC6133722 DOI: 10.1016/j.scr.2018.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 07/10/2018] [Accepted: 07/12/2018] [Indexed: 12/20/2022] Open
Abstract
Developmental pluripotency associated factor 4 (Dppa4) is a highly specific marker of pluripotent cells, and is also overexpressed in certain cancers, but its function in either of these contexts is poorly understood. In this study, we use ChIP-Seq to identify Dppa4 binding genome-wide in three distinct cell types: mouse embryonic stem cells (mESC), embryonal carcinoma cells, and 3T3 fibroblasts ectopically expressing Dppa4. We find a core set of Dppa4 binding sites shared across cell types, and also a substantial number of sites unique to each cell type. Across cell types Dppa4 shows a preference for binding to regions with active chromatin signatures, and can influence chromatin modifications at target genes. In 3T3 fibroblasts with enforced Dppa4 expression, Dppa4 represses the cell cycle inhibitor Cdkn2c and activates Ets family transcription factor Etv4, leading to alterations in the cell cycle that likely contribute to the oncogenic phenotype. Dppa4 also directly regulates Etv4 in mESC but represses it in this context, and binds with Oct4 to a set of shared targets that are largely independent of Sox2 and Nanog, indicating that Dppa4 functions independently of the core pluripotency network in stem cells. Together these data provide novel insights into Dppa4 function in both pluripotent and oncogenic contexts.
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Affiliation(s)
- Rachel Herndon Klein
- Department of Cell Biology and Human Anatomy, University of California, Davis, 1 Shields Ave, Davis, CA 95616, United States.; Institute of Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, United States
| | - Po-Yuan Tung
- Department of Cell Biology and Human Anatomy, University of California, Davis, 1 Shields Ave, Davis, CA 95616, United States.; Institute of Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, United States
| | - Priyanka Somanath
- Department of Cell Biology and Human Anatomy, University of California, Davis, 1 Shields Ave, Davis, CA 95616, United States.; Institute of Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, United States
| | | | - Paul S Knoepfler
- Department of Cell Biology and Human Anatomy, University of California, Davis, 1 Shields Ave, Davis, CA 95616, United States.; Institute of Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, United States.
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Zhang J, Cao H, Xie J, Fan C, Xie Y, He X, Liao M, Zhang S, Wang H. The oncogene Etv5 promotes MET in somatic reprogramming and orchestrates epiblast/primitive endoderm specification during mESCs differentiation. Cell Death Dis 2018; 9:224. [PMID: 29445086 PMCID: PMC5833841 DOI: 10.1038/s41419-018-0335-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/10/2018] [Accepted: 01/18/2018] [Indexed: 01/10/2023]
Abstract
Unipotent spermatogonial stem cells (SSCs) can be efficiently reprogrammed into pluripotent stem cells only by manipulating the culture condition, without introducing exogenous reprogramming factors. This phenotype raises the hypothesis that the endogenous transcription factors (TFs) in SSCs may facilitate reprogramming to acquire pluripotency. In this study, we screened a pool of SSCs TFs (Bcl6b, Lhx1, Foxo1, Plzf, Id4, Taf4b, and Etv5), and found that oncogene Etv5 could dramatically increase the efficiency of induced pluripotent stem cells (iPSCs) generation when combined with Yamanaka factors. We also demonstrated that Etv5 could promote mesenchymal-epithelial transition (MET) at the early stage of reprogramming by regulating Tet2-miR200s-Zeb1 axis. In addition, Etv5 knockdown in mouse embryonic stem cells (mESCs) could decrease the genomic 5hmC level by downregulating Tet2. Furthermore, the embryoid body assay revealed that Etv5 could positively regulate primitive endoderm specification through regulating Gata6 and negatively regulate epiblast specification by inhibiting Fgf5 expression. In summary, our findings provide insights into understanding the regulation mechanisms of Etv5 under the context of somatic reprogramming, mESCs maintenance, and differentiation.
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Affiliation(s)
- Jinglong Zhang
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Hongxia Cao
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jing Xie
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chen Fan
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Youlong Xie
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xin He
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Mingzhi Liao
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Shiqiang Zhang
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Huayan Wang
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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Yang L, Wang WH, Qiu WL, Guo Z, Bi E, Xu CR. A single-cell transcriptomic analysis reveals precise pathways and regulatory mechanisms underlying hepatoblast differentiation. Hepatology 2017; 66:1387-1401. [PMID: 28681484 PMCID: PMC5650503 DOI: 10.1002/hep.29353] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 05/21/2017] [Accepted: 06/30/2017] [Indexed: 12/18/2022]
Abstract
UNLABELLED How bipotential hepatoblasts differentiate into hepatocytes and cholangiocytes remains unclear. Here, using single-cell transcriptomic analysis of hepatoblasts, hepatocytes, and cholangiocytes sorted from embryonic day 10.5 (E10.5) to E17.5 mouse embryos, we found that hepatoblast-to-hepatocyte differentiation occurred gradually and followed a linear default pathway. As more cells became fully differentiated hepatocytes, the number of proliferating cells decreased. Surprisingly, proliferating and quiescent hepatoblasts exhibited homogeneous differentiation states at a given developmental stage. This unique feature enabled us to combine single-cell and bulk-cell analyses to define the precise timing of the hepatoblast-to-hepatocyte transition, which occurs between E13.5 and E15.5. In contrast to hepatocyte development at almost all levels, hepatoblast-to-cholangiocyte differentiation underwent a sharp detour from the default pathway. New cholangiocyte generation occurred continuously between E11.5 and E14.5, but their maturation states at a given developmental stage were heterogeneous. Even more surprising, the number of proliferating cells increased as more progenitor cells differentiated into mature cholangiocytes. Based on an observation from the single-cell analysis, we also discovered that the protein kinase C/mitogen-activated protein kinase signaling pathway promoted cholangiocyte maturation. CONCLUSION Our studies have defined distinct pathways for hepatocyte and cholangiocyte development in vivo, which are critically important for understanding basic liver biology and developing effective strategies to induce stem cells to differentiate toward specific hepatic cell fates in vitro. (Hepatology 2017;66:1387-1401).
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Affiliation(s)
- Li Yang
- Ministry of Education Key Laboratory of Cell Proliferation, College of Life Sciences, Peking-Tsinghua Center for Life Sciences; Peking University, Beijing, 100871 China,Academy for Advanced Interdisciplinary Studies; Peking University, Beijing, 100871 China
| | - Wei-Hua Wang
- Ministry of Education Key Laboratory of Cell Proliferation, College of Life Sciences, Peking-Tsinghua Center for Life Sciences; Peking University, Beijing, 100871 China,Academy for Advanced Interdisciplinary Studies; Peking University, Beijing, 100871 China
| | - Wei-Lin Qiu
- Ministry of Education Key Laboratory of Cell Proliferation, College of Life Sciences, Peking-Tsinghua Center for Life Sciences; Peking University, Beijing, 100871 China,PKU-Tsinghua-NIBS Graduate Program; Peking University, Beijing, 100871, China
| | - Zhen Guo
- Ministry of Education Key Laboratory of Cell Proliferation, College of Life Sciences, Peking-Tsinghua Center for Life Sciences; Peking University, Beijing, 100871 China
| | - Erfei Bi
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania 19104, USA
| | - Cheng-Ran Xu
- Ministry of Education Key Laboratory of Cell Proliferation, College of Life Sciences, Peking-Tsinghua Center for Life Sciences; Peking University, Beijing, 100871 China,Corresponding author: Dr. Cheng-Ran Xu,
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Zhu B, Ueda A, Song X, Horike SI, Yokota T, Akagi T. Baf53a is involved in survival of mouse ES cells, which can be compensated by Baf53b. Sci Rep 2017; 7:14059. [PMID: 29070872 PMCID: PMC5656580 DOI: 10.1038/s41598-017-14362-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 10/10/2017] [Indexed: 12/19/2022] Open
Abstract
The human Baf (Brg1/Brm associated factor) complex, also known as the mammalian SWI/SNF chromatin-remodeling complex, is involved in a variety of cellular processes. The pluripotency and self-renewal abilities are major characteristics of embryonic stem (ES) cells and are regulated by the ES cell-specific BAF (esBAF) complex. Baf53a is one of the subunits of the esBAF complex. Here, we found that Baf53a was expressed in undifferentiated ES cells and that it interacted with Oct3/4. Analyses of tetracycline-inducible Baf53a conditional knockout ES cells revealed that the undifferentiated markers, including Nanog and Oct3/4, were expressed in Baf53a-deficient ES cells; however, growth of the cells was repressed, and expression of p53, p21, and cleaved Caspase 3 was increased. Cell death of Baf53a-deficient ES cells was rescued by overexpression of Baf53a, but not by the Baf53a M3 mutant (E388A/R389A/R390A). Interestingly, Baf53b, a homologue of Baf53a, rescued cell death of Baf53a-deficient ES cells. Baf53a-deficient ES cells overexpressing exogenous Baf53a or Baf53b remained in the undifferentiated state, proliferated, and repressed expression of p21. In summary, our findings suggest that Baf53a is involved in the survival of ES cells by regulating p53 and Caspase3, and that Baf53b is able to compensate for this functional aspect of Baf53a.
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Affiliation(s)
- Bo Zhu
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University., 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan
| | - Atsushi Ueda
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University., 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan
| | - Xiaohong Song
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University., 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan
| | - Shin-Ichi Horike
- Advanced Science Research Center, Kanazawa University. 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan
| | - Takashi Yokota
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University., 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan.
| | - Tadayuki Akagi
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University., 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan.
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Kometani M, Yoneda T, Demura M, Koide H, Nishimoto K, Mukai K, Gomez-Sanchez CE, Akagi T, Yokota T, Horike SI, Karashima S, Miyamori I, Yamagishi M, Takeda Y. Cortisol overproduction results from DNA methylation of CYP11B1 in hypercortisolemia. Sci Rep 2017; 7:11205. [PMID: 28894201 PMCID: PMC5594008 DOI: 10.1038/s41598-017-11435-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 08/24/2017] [Indexed: 11/09/2022] Open
Abstract
Adrenocortical hormone excess, due to primary aldosteronism (PA) or hypercortisolemia, causes hypertension and cardiovascular complications. In PA, hypomethylation of aldosterone synthase (CYP11B2) is associated with aldosterone overproduction. However, in hypercortisolemia, the role of DNA methylation of 11β-hydroxylase (CYP11B1), which catalyzes cortisol biosynthesis and is highly homologous to CYP11B2, is unclear. The aims of our study were to determine whether the CYP11B1 expression was regulated through DNA methylation in hypercortisolemia with cortisol-producing adenoma (CPA), and to investigate a possible relationship between DNA methylation and somatic mutations identified in CPA. Methylation analysis showed that the CYP11B1 promoter was significantly less methylated in CPA than in adjacent unaffected adrenal tissue and white blood cells. Furthermore, in CPA with somatic mutations in either the catalytic subunit of protein kinase A (PRKACA) or the guanine nucleotide-binding protein subunit alpha (GNAS) gene, the CYP11B1 promoter was significantly hypomethylated. In addition, DNA methylation reduced CYP11B1 promoter activity using a reporter assay. Our study results suggest that DNA methylation at the CYP11B1 promoter plays a role in the regulation of CYP11B1 expression and cortisol production in CPA, and that somatic mutations associated with CPA reduce DNA methylation at the CYP11B1 promoter.
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Affiliation(s)
- Mitsuhiro Kometani
- Division of Endocrinology and Hypertension, Department of Cardiovascular and Internal Medicine, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, 920-8640, Japan
| | - Takashi Yoneda
- Division of Endocrinology and Hypertension, Department of Cardiovascular and Internal Medicine, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, 920-8640, Japan. .,Program Management Office for Paradigms Establishing Centers for Fostering Medical Researchers of the Future, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan.
| | - Masashi Demura
- Department of Hygiene, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, 920-8641, Japan
| | - Hiroshi Koide
- Laboratory of Molecular and Biochemical Research, Research Support Center, Juntendo University Graduate School of Medicine, Tokyo, 113-8421, Japan
| | - Koshiro Nishimoto
- Department of Uro-Oncology, Saitama Medical University International Medical Center, Hidaka, Saitama, 350-1241, Japan
| | - Kuniaki Mukai
- Department of Biochemistry and Medical Education Center, Keio University School of Medicine, Tokyo, 160-8582, Japan
| | - Celso E Gomez-Sanchez
- Endocrinology Section, G.V. (Sonny) Montgomery VA Medical Center and University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Tadayuki Akagi
- Department of Stem Cell Biology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Takashi Yokota
- Department of Stem Cell Biology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Shin-Ichi Horike
- Advanced Science Research Center, Kanazawa University, Kanazawa, Ishikawa, 920-8640, Japan
| | - Shigehiro Karashima
- Division of Endocrinology and Hypertension, Department of Cardiovascular and Internal Medicine, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, 920-8640, Japan
| | - Isamu Miyamori
- University of Fukui, Yoshida-gun, Fukui, 910-1193, Japan
| | - Masakazu Yamagishi
- Division of Endocrinology and Hypertension, Department of Cardiovascular and Internal Medicine, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, 920-8640, Japan
| | - Yoshiyu Takeda
- Division of Endocrinology and Hypertension, Department of Cardiovascular and Internal Medicine, Kanazawa University Graduate School of Medicine, Kanazawa, Ishikawa, 920-8640, Japan
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Ueda A, Akagi T, Yokota T. GA-Binding Protein Alpha Is Involved in the Survival of Mouse Embryonic Stem Cells. Stem Cells 2017; 35:2229-2238. [PMID: 28762569 DOI: 10.1002/stem.2673] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 06/18/2017] [Accepted: 07/15/2017] [Indexed: 01/14/2023]
Abstract
Ets-related transcription factor GA-binding protein alpha (GABPα), which is encoded by Gabpa, is expressed in a variety of cell types and is involved in cellular functions such as cell cycle regulation, apoptosis, and differentiation. Here, we generated Gabpa conditional knockout embryonic stem cells (ESCs) and characterized its cellular phenotypes. Disruption of Gabpa revealed that the proliferation of Gabpa-null ESCs was drastically repressed and cells started to die within 2 days. The repressed proliferation of Gabpa-null ESCs was recovered by artificially forced expression of GABPα. Expression analysis showed that p53 mRNA levels were comparable; however, p53 target genes, including Cdkn1a/p21, Mdm2, and Gadd45a, were upregulated and cell cycle-related genes, including Cyclin D1/D2 and Cyclin E1/E2, were downregulated in Gabpa-null ESCs. Interestingly, p53 and cleaved Caspase3 expressions were enhanced in the cells and reduced proliferation as well as cell death of Gabpa-null ESCs were rescued by either transfection of p53 RNAi or treatment of the p53 inhibitor pifithrin-α. These results suggest that GABPα inhibits the accumulation of p53 and is involved in the proliferation and survival of ESCs. Stem Cells 2017;35:2229-2238.
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Affiliation(s)
- Atsushi Ueda
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan
| | - Tadayuki Akagi
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan
| | - Takashi Yokota
- Department of Stem Cell Biology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan
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Hu K, Zhang J, Liang M. LncRNA AK015322 promotes proliferation of spermatogonial stem cell C18-4 by acting as a decoy for microRNA-19b-3p. In Vitro Cell Dev Biol Anim 2016; 53:277-284. [PMID: 27822884 DOI: 10.1007/s11626-016-0102-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 09/27/2016] [Indexed: 01/07/2023]
Abstract
Long noncoding RNAs (lncRNAs) have been reported to play important roles in male reproduction. In our previous research, we studied the expression profile of lncRNAs in mouse male germ cells including spermatogonial stem cell, type A spermatogonia, pachytene spermatocyte, and round spermatid by microarray method, which showed that testis-enriched lncRNA AK015322 is highly expressed in spermatogonial stem cell. In this study, we found that AK015322 promotes proliferation of mouse spermatogonial stem cell line C18-4 in vitro. Furthermore, bioinformatic analysis, real-time PCR, and luciferase assay validated that AK015322 serves as a decoy of microRNA-19b-3p (miR-19b-3p), antagonizes its function, and attenuates the repression of its endogenous target transcriptional factor Ets-variant 5 (ETV5) which was a pivotal gene for spermatogonial stem cell self-renewal. Taken together, our results suggest that a variety of lncRNAs may regulate male reproduction through serving as competing-endogenous RNAs to modulate the function of germ cells.
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Affiliation(s)
- Ke Hu
- Department of Biology, Bengbu Medical College, Bengbu, Anhui, People's Republic of China
| | - Jing Zhang
- Department of Biology, Bengbu Medical College, Bengbu, Anhui, People's Republic of China
| | - Meng Liang
- Department of Biology, Bengbu Medical College, Bengbu, Anhui, People's Republic of China.
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Developmental transcriptome analysis and identification of genes involved in formation of intestinal air-breathing function of Dojo loach, Misgurnus anguillicaudatus. Sci Rep 2016; 6:31845. [PMID: 27545457 PMCID: PMC4992823 DOI: 10.1038/srep31845] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 07/26/2016] [Indexed: 11/17/2022] Open
Abstract
Dojo loach, Misgurnus anguillicaudatus is a freshwater fish species of the loach family Cobitidae, using its posterior intestine as an accessory air-breathing organ. Little is known about the molecular regulatory mechanisms in the formation of intestinal air-breathing function of M. anguillicaudatus. Here high-throughput sequencing of mRNAs was performed from six developmental stages of posterior intestine of M. anguillicaudatus: 4-Dph (days post hatch) group, 8-Dph group, 12-Dph group, 20-Dph group, 40-Dph group and Oyd (one-year-old) group. These six libraries were assembled into 81300 unigenes. Totally 40757 unigenes were annotated. Subsequently, 35291 differentially expressed genes (DEGs) were scanned among different developmental stages and clustered into 20 gene expression profiles. Finally, 15 key pathways and 25 key genes were mined, providing potential targets for candidate gene selection involved in formation of intestinal air-breathing function in M. anguillicaudatus. This is the first report of developmental transcriptome of posterior intestine in M. anguillicaudatus, offering a substantial contribution to the sequence resources for this species and providing a deep insight into the formation mechanism of its intestinal air-breathing function. This report demonstrates that M. anguillicaudatus is a good model for studies to identify and characterize the molecular basis of accessory air-breathing organ development in fish.
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Gao NA, Yu WZ, Wang XX, Sun JR, Yu N, Liu ZY, Liu XD, Liu RT, Feng R, Ding BT, Sang T, Guo NJ. Significance of ETV6 rearrangement in acute promyelocytic leukemia with t(15;17)/promyelocytic leukemia/retinoic acid receptor alpha. Oncol Lett 2016; 11:3953-3960. [PMID: 27313723 PMCID: PMC4888070 DOI: 10.3892/ol.2016.4544] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 03/24/2016] [Indexed: 01/28/2023] Open
Abstract
Acute promyelocytic leukemia (APL) is a common subtype of acute myeloid leukemia in China. Since the application of arsenic trioxide and all-trans retinoic acid in the treatment of APL, the prognosis has greatly improved. However, ~20% of patients with APL relapse upon completing chemotherapy. Decreasing the relapse rate and incidence of early mortality may pose the greatest challenges for the future management of APL. Recently, Ets variant 6 (ETV6) was reported to be involved in a variety of translocations associated with hematological malignancies of myeloid and lymphoid origin. To date, little is known about the clinical implication of ETV6 rearrangement in APL. In the present study, ETV6 rearrangement was examined by split-signal fluorescence in situ hybridization in 258 adults with APL, and its association with the clinical features and outcomes of the patients was analyzed. The data suggested that ETV6 rearrangement may be an independent unfavorable prognostic factor for overall survival in APL patients.
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Affiliation(s)
- N A Gao
- Department of Hematology, Central Hospital of Jinan, Shandong University School of Medicine, Jinan, Shandong 250013, P.R. China; Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Wen-Zheng Yu
- Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Xue-Xia Wang
- Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Jian-Rong Sun
- Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Ning Yu
- Department of Pathology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Zeng-Yan Liu
- Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Xiao-Dan Liu
- Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Ren-Tong Liu
- Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Rui Feng
- Department of Hematology, Binzhou Medical University Hospital, Binzhou, Shandong 256603, P.R. China
| | - Bu-Tong Ding
- Department of Hematology, Central Hospital of Jinan, Shandong University School of Medicine, Jinan, Shandong 250013, P.R. China
| | - Tan Sang
- Department of Hematology, Central Hospital of Jinan, Shandong University School of Medicine, Jinan, Shandong 250013, P.R. China
| | - Nong-Jian Guo
- Department of Hematology, Central Hospital of Jinan, Shandong University School of Medicine, Jinan, Shandong 250013, P.R. China
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Marra AN, Wingert RA. Epithelial cell fate in the nephron tubule is mediated by the ETS transcription factors etv5a and etv4 during zebrafish kidney development. Dev Biol 2016; 411:231-245. [PMID: 26827902 DOI: 10.1016/j.ydbio.2016.01.035] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 01/19/2016] [Accepted: 01/27/2016] [Indexed: 02/06/2023]
Abstract
Kidney development requires the differentiation and organization of discrete nephron epithelial lineages, yet the genetic and molecular pathways involved in these events remain poorly understood. The embryonic zebrafish kidney, or pronephros, provides a simple and useful model to study nephrogenesis. The pronephros is primarily comprised of two types of epithelial cells: transportive and multiciliated cells (MCCs). Transportive cells occupy distinct tubule segments and are characterized by the expression of various solute transporters, while MCCs function in fluid propulsion and are dispersed in a "salt-and-pepper" fashion within the tubule. Epithelial cell identity is reliant on interplay between the Notch signaling pathway and retinoic acid (RA) signaling, where RA promotes MCC fate by inhibiting Notch activity in renal progenitors, while Notch acts downstream to trigger transportive cell formation and block adoption of an MCC identity. Previous research has shown that the transcription factor ets variant 5a (etv5a), and its closely related ETS family members, are required for ciliogenesis in other zebrafish tissues. Here, we mapped etv5a expression to renal progenitors that occupy domains where MCCs later emerge. Thus, we hypothesized that etv5a is required for normal development of MCCs in the nephron. etv5a loss of function caused a decline of MCC number as indicated by the reduced frequency of cells that expressed the MCC-specific markers outer dense fiber of sperm tails 3b (odf3b) and centrin 4 (cetn4), where rescue experiments partially restored MCC incidence. Interestingly, deficiency of ets variant 4 (etv4), a related gene that is broadly expressed in the posterior mesoderm during somitogenesis stages, also led to reduced MCC numbers, which were further reduced by dual etv5a/4 deficiency, suggesting that both of these ETS factors are essential for MCC formation and that they also might have redundant activities. In epistatic studies, exogenous RA treatment expanded the etv5a domain within the renal progenitor field and RA inhibition blocked etv5a in this populace, indicating that etv5a acts downstream of RA. Additionally, treatment with exogenous RA partially rescued the reduced MCC phenotype after loss of etv5a. Further, abrogation of Notch with the small molecule inhibitor DAPT increased the renal progenitor etv5a expression domain as well as MCC density in etv5a deficient embryos, suggesting Notch acts upstream to inhibit etv5a. In contrast, etv4 levels in renal progenitors were unaffected by changes in RA or Notch signaling levels, suggesting a possible non-cell autonomous role during pronephros formation. Taken together, these findings have revealed new insights about the genetic mechanisms of epithelial cell development during nephrogenesis.
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Affiliation(s)
- Amanda N Marra
- Department of Biological Sciences, Center for Zebrafish Research, Center for Stem Cells and Regenerative Medicine, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Rebecca A Wingert
- Department of Biological Sciences, Center for Zebrafish Research, Center for Stem Cells and Regenerative Medicine, University of Notre Dame, Notre Dame, IN 46556, USA.
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Could ehrlichial infection cause some of the changes associated with leukemia, myelodysplastic diseases and autoimmune disorders, and offer antibiotic treatment options? Med Hypotheses 2015; 85:891-3. [PMID: 26394545 DOI: 10.1016/j.mehy.2015.09.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 08/15/2015] [Accepted: 09/12/2015] [Indexed: 10/23/2022]
Abstract
We hypothesize that a large group of medical conditions of unknown etiology including leukemia, multiple myeloma, myelodysplastic and autoimmune disorders, may be associated with or caused by an obscure group of intracellular obligate parasitic bacteria named Ehrlichia/Anaplasma (EA). Ensconced in the stem cells of the bone marrow, EA may disrupt the normal development and function of many of the cells of immunity, manifesting itself as different syndromes. Recent studies of the activity of EA suggest direct effects on the immune system consistent with the manifestations of leukemia. We reference here three leukemia patients with direct or indirect evidence of EA infection. Moreover, EA have been shown to be most sensitive to rifamycins. Two moribund leukemia patients with levels of platelets and white cells incompatible with life were treated with therapeutic doses of Rifampin. Though they did not survive, their condition improved dramatically for a time, suggesting Rifampin provided some therapeutic benefit. We assert that these results warrant more extensive study.
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