1
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Li C, Xin H, Hao J, Miao Y. Decreasing of serine/threonine kinase 39 has tumour inhibiting effects on acute myeloid leukaemia by impacting the PI3K/AKT and Wnt/β-catenin signalling cascades. Toxicol Appl Pharmacol 2024; 489:116982. [PMID: 38821216 DOI: 10.1016/j.taap.2024.116982] [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: 01/18/2024] [Revised: 05/26/2024] [Accepted: 05/28/2024] [Indexed: 06/02/2024]
Abstract
Serine/threonine kinase 39 (STK39) has been identified as a key regulator of tumour progression. However, whether STK39 plays a role in acute myeloid leukaemia (AML) remains undetermined. This work explored the expression and functions of STK39 in AML. STK39 was found to be overexpressed in AML and was negatively correlated with overall survival. Functionally, silencing STK39 inhibited cell proliferation, promoted cell differentiation and induced cell cycle arrest and apoptosis. The tumour inhibiting effects of STK39 downregulation were also verified by an in vivo xenograft tumour assay. Mechanistically, STK39 was closely related to the PI3K/AKT and Wnt/β-catenin signalling cascades in AML. Silencing of STK39 had suppressive effects on the PI3K/AKT and Wnt/β-catenin signalling cascades. The suppressive effect of STK39 silencing on the Wnt/β-catenin signalling cascade was significantly reversed when PI3K/AKT was reactivated. When β-catenin was re-expressed, the tumour-inhibiting effects caused by STK39 silencing were significantly eliminated. Therefore, STK39 plays a crucial role in AML and could be targeted for potential therapeutic purposes in treating AML.
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Affiliation(s)
- Chengliang Li
- Department of General Practice, Guangzhou First People's Hospital, Guangzhou 510180, China
| | - Hong Xin
- Department of Cardiovasology, Guangzhou First People's Hospital, Guangzhou 510180, China
| | - Jiajia Hao
- Department of General Practice, Guangzhou First People's Hospital, Guangzhou 510180, China
| | - Yudi Miao
- Department of Hematology, Shaanxi Provincial People's Hospital, Xi'an 710000, China.
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2
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Magro-Lopez E, Vazquez-Alejo E, Espinar-Buitrago MDLS, Muñoz-Fernández MÁ. Optimizing Nodal, Wnt and BMP signaling pathways for robust and efficient differentiation of human induced pluripotent stem cells to intermediate mesoderm cells. Front Cell Dev Biol 2024; 12:1395723. [PMID: 38887514 PMCID: PMC11182123 DOI: 10.3389/fcell.2024.1395723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 05/06/2024] [Indexed: 06/20/2024] Open
Abstract
Several differentiation protocols have enabled the generation of intermediate mesoderm (IM)-derived cells from human pluripotent stem cells (hPSC). However, the substantial variability between existing protocols for generating IM cells compromises their efficiency, reproducibility, and overall success, potentially hindering the utility of urogenital system organoids. Here, we examined the role of high levels of Nodal signaling and BMP activity, as well as WNT signaling in the specification of IM cells derived from a UCSD167i-99-1 human induced pluripotent stem cells (hiPSC) line. We demonstrate that precise modulation of WNT and BMP signaling significantly enhances IM differentiation efficiency. Treatment of hPSC with 3 μM CHIR99021 induced TBXT+/MIXL1+ mesoderm progenitor (MP) cells after 48 h of differentiation. Further treatment with a combination of 3 μM CHIR99021 and 4 ng/mL BMP4 resulted in the generation of OSR1+/GATA3+/PAX2+ IM cells within a subsequent 48 h period. Molecular characterization of differentiated cells was confirmed through immunofluorescence staining and RT-qPCR. Hence, this study establishes a consistent and reproducible protocol for differentiating hiPSC into IM cells that faithfully recapitulates the molecular signatures of IM development. This protocol holds promise for improving the success of protocols designed to generate urogenital system organoids in vitro, with potential applications in regenerative medicine, drug discovery, and disease modeling.
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Affiliation(s)
- Esmeralda Magro-Lopez
- Molecular Immuno-Biology Laboratory, Immunology Section, Hospital General Universitario Gregorio Marañón (HGUGM), Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - Elena Vazquez-Alejo
- Molecular Immuno-Biology Laboratory, Immunology Section, Hospital General Universitario Gregorio Marañón (HGUGM), Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - María de la Sierra Espinar-Buitrago
- Molecular Immuno-Biology Laboratory, Immunology Section, Hospital General Universitario Gregorio Marañón (HGUGM), Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
| | - María Ángeles Muñoz-Fernández
- Molecular Immuno-Biology Laboratory, Immunology Section, Hospital General Universitario Gregorio Marañón (HGUGM), Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain
- Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
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3
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Touahri Y, Hanna J, Tachibana N, Okawa S, Liu H, David LA, Olender T, Vasan L, Pak A, Mehta DN, Chinchalongporn V, Balakrishnan A, Cantrup R, Dixit R, Mattar P, Saleh F, Ilnytskyy Y, Murshed M, Mains PE, Kovalchuk I, Lefebvre JL, Leong HS, Cayouette M, Wang C, Del Sol A, Brand M, Reese BE, Schuurmans C. Pten regulates endocytic trafficking of cell adhesion and Wnt signaling molecules to pattern the retina. Cell Rep 2024; 43:114005. [PMID: 38551961 PMCID: PMC11290456 DOI: 10.1016/j.celrep.2024.114005] [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: 09/08/2022] [Revised: 01/30/2024] [Accepted: 03/11/2024] [Indexed: 04/28/2024] Open
Abstract
The retina is exquisitely patterned, with neuronal somata positioned at regular intervals to completely sample the visual field. Here, we show that phosphatase and tensin homolog (Pten) controls starburst amacrine cell spacing by modulating vesicular trafficking of cell adhesion molecules and Wnt proteins. Single-cell transcriptomics and double-mutant analyses revealed that Pten and Down syndrome cell adhesion molecule Dscam) are co-expressed and function additively to pattern starburst amacrine cell mosaics. Mechanistically, Pten loss accelerates the endocytic trafficking of DSCAM, FAT3, and MEGF10 off the cell membrane and into endocytic vesicles in amacrine cells. Accordingly, the vesicular proteome, a molecular signature of the cell of origin, is enriched in exocytosis, vesicle-mediated transport, and receptor internalization proteins in Pten conditional knockout (PtencKO) retinas. Wnt signaling molecules are also enriched in PtencKO retinal vesicles, and the genetic or pharmacological disruption of Wnt signaling phenocopies amacrine cell patterning defects. Pten thus controls vesicular trafficking of cell adhesion and signaling molecules to establish retinal amacrine cell mosaics.
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Affiliation(s)
- Yacine Touahri
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON M5T 3A9, Canada
| | - Joseph Hanna
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON M5T 3A9, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Nobuhiko Tachibana
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Satoshi Okawa
- Computational Biology Group, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg; Pittsburgh Heart, Lung, and Blood Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA; Department of Computational and Systems Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Hedy Liu
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Luke Ajay David
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON M5T 3A9, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Thomas Olender
- Sprott Center for Stem Cell Research, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, ON K1H 8L6, Canada
| | - Lakshmy Vasan
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Alissa Pak
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Dhruv Nimesh Mehta
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON M5T 3A9, Canada
| | - Vorapin Chinchalongporn
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Anjali Balakrishnan
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Robert Cantrup
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Rajiv Dixit
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Pierre Mattar
- Cellular Neurobiology Research Unit, Institut de Recherches Cliniques de Montréal (IRCM), Montreal, QC H2W 1R7, Canada
| | - Fermisk Saleh
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Yaroslav Ilnytskyy
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Monzur Murshed
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, QC H3G 1A6, Canada
| | - Paul E Mains
- Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Igor Kovalchuk
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Julie L Lefebvre
- Department of Molecular Genetics, University of Toronto, Toronto ON M5S 1A8, Canada; Program for Neuroscience and Mental Health, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Hon S Leong
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Michel Cayouette
- Cellular Neurobiology Research Unit, Institut de Recherches Cliniques de Montréal (IRCM), Montreal, QC H2W 1R7, Canada
| | - Chao Wang
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Immunology, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Antonio Del Sol
- Computational Biology Group, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg; CIC bioGUNE, Bizkaia Technology Park, 48160 Derio, Spain; IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Marjorie Brand
- Sprott Center for Stem Cell Research, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, ON K1H 8L6, Canada
| | - Benjamin E Reese
- Department of Psychological and Brain Sciences, Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA 93106-5060, USA
| | - Carol Schuurmans
- Biological Sciences Platform, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON M4N 3M5, Canada; Department of Biochemistry, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, ON M5T 3A9, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada; Department of Biochemistry and Molecular Biology, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB T2N 4N1, Canada.
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4
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Wu B, Yang Z, Liu Y, Li J, Chen C, Li X, Bao S. A chemically defined system supports two distinct types of stem cell from a single blastocyst and their self-assembly to generate blastoid. Cell Prolif 2023:e13396. [PMID: 36593753 DOI: 10.1111/cpr.13396] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 12/15/2022] [Accepted: 12/21/2022] [Indexed: 01/04/2023] Open
Abstract
The pluripotent stem cells exist in a narrow window during early development and its derivation depends on intrinsic and extrinsic growth signalling in vitro. It has remained challenging to derive two or three distinct cell lines that are representative of blastocyst-stage lineages from one preimplantation embryo simultaneously in a chemical defined condition. Therefore, it is desirable to establish a system by manipulating extrinsic signalling in culture to derive multiple types of stem cells from a single blastocyst. This study used a defined medium containing Activin A, WNT activator and LIF (ACL medium), enabling establishment of ACL-ESCs and ACL-XEN cells from one blastocyst. ACL-blastoids were generated by suspending ACL-ESCs and ACL-XEN cells with ACL-blastoid medium in three-dimensional culture system. Lineage markers expression of ACL-blastoids were performed by immunofluorescence. Our results indicate that ACL-ESCs and ACL-XEN cells derived from one blastocyst represent ICM and PrE lineages. Importantly, we obtained ACL-blastoid from ACL-ESCs and ACL-XEN cells self-aggregation, partially recapitulating early development and initiation of early implantation events. This study would not only provide ACL culture system for derivation and maintenance of two types of cell lines corresponding to ICM as well as PrE, but also reconstruct blastoids with them to deepen our understanding of early embryogenesis and widen insights into translational application of stem cells.
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Affiliation(s)
- Baojiang Wu
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Centre for Animal Genetic Resources of Mongolia Plateau, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Zhiqing Yang
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Centre for Animal Genetic Resources of Mongolia Plateau, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Yijie Liu
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Centre for Animal Genetic Resources of Mongolia Plateau, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Jianwen Li
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Centre for Animal Genetic Resources of Mongolia Plateau, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Chen Chen
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Centre for Animal Genetic Resources of Mongolia Plateau, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Xihe Li
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Centre for Animal Genetic Resources of Mongolia Plateau, College of Life Sciences, Inner Mongolia University, Hohhot, China.,Inner Mongolia Saikexing Institute of Breeding and Reproductive Biotechnology in Domestic Animal, Hohhot, China
| | - Siqin Bao
- The State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock, Inner Mongolia University, Hohhot, China.,Research Centre for Animal Genetic Resources of Mongolia Plateau, College of Life Sciences, Inner Mongolia University, Hohhot, China
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5
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Canse C, Yildirim E, Yaba A. Overview of junctional complexes during mammalian early embryonic development. Front Endocrinol (Lausanne) 2023; 14:1150017. [PMID: 37152932 PMCID: PMC10158982 DOI: 10.3389/fendo.2023.1150017] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 02/28/2023] [Indexed: 05/09/2023] Open
Abstract
Cell-cell junctions form strong intercellular connections and mediate communication between blastomeres during preimplantation embryonic development and thus are crucial for cell integrity, polarity, cell fate specification and morphogenesis. Together with cell adhesion molecules and cytoskeletal elements, intercellular junctions orchestrate mechanotransduction, morphokinetics and signaling networks during the development of early embryos. This review focuses on the structure, organization, function and expressional pattern of the cell-cell junction complexes during early embryonic development. Understanding the importance of dynamic junction formation and maturation processes will shed light on the molecular mechanism behind developmental abnormalities of early embryos during the preimplantation period.
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Affiliation(s)
- Ceren Canse
- Faculty of Medicine, Yeditepe University, Istanbul, Türkiye
| | - Ecem Yildirim
- Department of Histology and Embryology, Yeditepe University Faculty of Medicine, Istanbul, Türkiye
| | - Aylin Yaba
- Department of Histology and Embryology, Yeditepe University Faculty of Medicine, Istanbul, Türkiye
- *Correspondence: Aylin Yaba,
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6
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Mammalian gastrulation: signalling activity and transcriptional regulation of cell lineage differentiation and germ layer formation. Biochem Soc Trans 2022; 50:1619-1631. [DOI: 10.1042/bst20220256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 11/01/2022] [Accepted: 11/09/2022] [Indexed: 11/19/2022]
Abstract
The interplay of signalling input and downstream transcriptional activity is the key molecular attribute driving the differentiation of germ layer tissue and the specification of cell lineages within each germ layer during gastrulation. This review delves into the current understanding of signalling and transcriptional control of lineage development in the germ layers of mouse embryo and non-human primate embryos during gastrulation and highlights the inter-species conservation and divergence of the cellular and molecular mechanisms of germ layer development in the human embryo.
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7
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Wei Y, Wang B, Jia L, Huang W, Xiang AP, Fang C, Liang X, Li W. Lateral Mesoderm-Derived Mesenchymal Stem Cells With Robust Osteochondrogenic Potential and Hematopoiesis-Supporting Ability. Front Mol Biosci 2022; 9:767536. [PMID: 35573747 PMCID: PMC9095820 DOI: 10.3389/fmolb.2022.767536] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are among the most promising cell sources for the treatment of various diseases. Nonetheless, the therapeutic efficacy in clinical trials has been inconsistent due to the heterogeneity of MSCs, which may be partially attributed to their undefined developmental origins. The lateral mesoderm is also a developmental source of MSCs that constitute appendicular skeletal elements in the developing vertebrate embryo. However, it is difficult to isolate homogeneous lateral mesoderm (LM)-derived MSCs from bone tissues or bone marrow due to the lack of understanding of their characteristics. Herein, we successfully established an efficient differentiation protocol for the derivation of MSCs with a LM origin from human pluripotent stem cells (hPSCs) under specific conditions. LM-MSCs resembled bone marrow-derived MSCs (BMSCs) with regard to cell surface markers, global gene profiles, and immunoregulatory activity and showed a homeodomain transcription factor (HOX) gene expression pattern typical of skeletal MSCs in long bones. Moreover, we demonstrated that LM-MSCs had an increased osteogenic/chondrogenic differentiation capacity and hematopoietic support potential compared to BMSCs. These homogeneous LM-MSCs may serve as a powerful tool for elucidating their precise role in bone formation and hematopoiesis and could be a potentially ideal cell source for therapeutic applications.
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Affiliation(s)
- Yili Wei
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Bin Wang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Lei Jia
- Reproductive Medicine Research Center, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Weijun Huang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Andy Peng Xiang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
- Department of Biochemistry, Zhongshan Medical School, Sun Yat-Sen University, Guangzhou, China
| | - Cong Fang
- Reproductive Medicine Research Center, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xiaoyan Liang
- Reproductive Medicine Research Center, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
- *Correspondence: Xiaoyan Liang, ; Weiqiang Li,
| | - Weiqiang Li
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
- Department of Biochemistry, Zhongshan Medical School, Sun Yat-Sen University, Guangzhou, China
- *Correspondence: Xiaoyan Liang, ; Weiqiang Li,
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8
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Tissue-Nonspecific Alkaline Phosphatase, a Possible Mediator of Cell Maturation: Towards a New Paradigm. Cells 2021; 10:cells10123338. [PMID: 34943845 PMCID: PMC8699127 DOI: 10.3390/cells10123338] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 01/01/2023] Open
Abstract
Alkaline phosphatase (ALP) is a ubiquitous membrane-bound glycoprotein capable of providing inorganic phosphate by catalyzing the hydrolysis of organic phosphate esters, or removing inorganic pyrophosphate that inhibits calcification. In humans, four forms of ALP cDNA have been cloned, among which tissue-nonspecific ALP (TNSALP) (TNSALP) is widely distributed in the liver, bone, and kidney, making it an important marker in clinical and basic research. Interestingly, TNSALP is highly expressed in juvenile cells, such as pluripotent stem cells (i.e., embryonic stem cells and induced pluripotent stem cells (iPSCs)) and somatic stem cells (i.e., neuronal stem cells and bone marrow mesenchymal stem cells). Hypophosphatasia is a genetic disorder causing defects in bone and tooth development as well as neurogenesis. Mutations in the gene coding for TNSALP are thought to be responsible for the abnormalities, suggesting the essential role of TNSALP in these events. Moreover, a reverse-genetics-based study using mice revealed that TNSALP is important in bone and tooth development as well as neurogenesis. However, little is known about the role of TNSALP in the maintenance and differentiation of juvenile cells. Recently, it was reported that cells enriched with TNSALP are more easily reprogrammed into iPSCs than those with less TNSALP. Furthermore, in bone marrow stem cells, ALP could function as a "signal regulator" deciding the fate of these cells. In this review, we summarize the properties of ALP and the background of ALP gene analysis and its manipulation, with a special focus on the potential role of TNSALP in the generation (and possibly maintenance) of juvenile cells.
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9
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Huang GJ, Xie XL, Zou Y. MiR-23b targets GATA6 to down-regulate IGF-1 and promote the development of congenital heart disease. Acta Cardiol 2021; 77:375-384. [PMID: 34582317 DOI: 10.1080/00015385.2021.1948207] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Congenital heart disease (CHD) is the most universal congenital defect disease. This study explores the interrelationship between miR-23b and GTAT6 in the development of CHD. METHODS We collected clinical samples and constructed in vitro cell models to evaluate the expression of miR-23b, GATA6, and IGF-1. CHD cell models were constructed by hypoxia in H9C2 cells. The expression levels of GATA6 and IGF-1 in H9C2 cells were determined by western blot and qPCR. MiR-23b was knocked down by transfection miR-23b inhibitor. GATA6 knockdown or overexpression vectors were established by the lentiviral approach and cell transfection, respectively. According to the CCK-8 assay and flow cytometry analysis, the proliferation and apoptosis of H9C2 cells were detected. The binding relationship between GATA6 and miR-23b was detected by luciferase reporter assay. RESULTS The expression level of miR-23b was escalated abnormally, while the expression levels of GATA6 and IGF-1 were decreased in the serum of CHD clinical patients and cell models. miR-23b knockdown in H9C2 cells could up-regulate the expression of GATA6, thus improved the proliferation and decreased apoptosis of H9C2 cells. Overexpression of GATA6 could up-regulate IGF-1 to promote proliferation and inhibit apoptosis in H9C2 cells. MiR-23b could target GATA6 and regulated IGF-1, thus affecting cell proliferation and apoptosis. CONCLUSION The expression level of miR-23b was remarkably up-regulated in serum of CHD patients and H9C2 cells in vitro, while the expression of GATA6 and IGF-1 was significantly decreased. MiR-23b could influence the proliferation and apoptosis of cardiomyocytes by targeting the down-regulation of the GATA6/IGF-1 axis.
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Affiliation(s)
- Guo-Jin Huang
- Pediatric Heart Disease Treatment Center of Jiangxi Province, Jiangxi Provincial Children's Hospital, Nanchang, Jiangxi, China
| | - Xue-Liang Xie
- Pediatric Heart Disease Treatment Center of Jiangxi Province, Jiangxi Provincial Children's Hospital, Nanchang, Jiangxi, China
| | - Yong Zou
- Pediatric Heart Disease Treatment Center of Jiangxi Province, Jiangxi Provincial Children's Hospital, Nanchang, Jiangxi, China
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10
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De Maré A, D’Haese PC, Verhulst A. The Role of Sclerostin in Bone and Ectopic Calcification. Int J Mol Sci 2020; 21:ijms21093199. [PMID: 32366042 PMCID: PMC7246472 DOI: 10.3390/ijms21093199] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 04/27/2020] [Accepted: 04/29/2020] [Indexed: 02/06/2023] Open
Abstract
Sclerostin, a 22-kDa glycoprotein that is mainly secreted by the osteocytes, is a soluble inhibitor of canonical Wnt signaling. Therefore, when present at increased concentrations, it leads to an increased bone resorption and decreased bone formation. Serum sclerostin levels are known to be increased in the elderly and in patients with chronic kidney disease. In these patient populations, there is a high incidence of ectopic cardiovascular calcification. These calcifications are strongly associated with cardiovascular morbidity and mortality. Although data are still controversial, it is likely that there is a link between ectopic calcification and serum sclerostin levels. The main question, however, remains whether sclerostin exerts either a protective or deleterious role in the ectopic calcification process.
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Shi P, Xu J, Zhao X, Shen P, Wen D, Yu Q, Deng Y, Shi D, Lu F. CK1 inhibitor affects in vitro maturation and developmental competence of bovine oocytes. Reprod Domest Anim 2019; 54:1104-1112. [PMID: 31155763 DOI: 10.1111/rda.13483] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 02/17/2019] [Accepted: 05/24/2019] [Indexed: 11/27/2022]
Abstract
The objectives of present study were to evaluate the effect of casein kinase 1 (CK1) inhibition D4476 on in vitro maturation (IVM) and developmental competence of bovine oocytes. The cumulus oocyte complexes (COCs) were cultured in maturation medium with D4476 (0, 2, 5, 10, 20 μM) for 24 hr. After IVM and in vitro fertilization, through expansion average scores of cumulus cells (CCs), oocyte maturation efficiency, cleavage rate and blastocyst rate of zygote, we found 5 μM D4476 could increase the development potential of oocytes. After the COCs were treated with 5 μM D4476, the results of quantitative real-time PCR analysis, Lichen red staining and PI staining showed that under without affecting germinal vesicle breakdown and nuclear morphology, D4476 could significantly decrease CK1 and upregulate TCF-4 in oocytes. Furthermore, without influencing the level of Bad and CTSB, D4476 could significantly increase the expression of β-catenin, TCF-4, Cx43, MAPK, PTGS-2, PTX-3, TGS-6, Bax and Bcl-2 in CCs. Western blot analysis revealed that the addition of 5 μM D4476 during the maturation of COCs resulted in a lower level of Cx43 protein at 12 hr and a higher expression of Cx43 protein at 24 hr compared to the group without D4476. These results indicate that adding optimum D4476 (5 μM) to maturation medium is beneficial to maturity efficiency and development competence of bovine oocytes.
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Affiliation(s)
- Pengfei Shi
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Jie Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Xin Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Penglei Shen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Dongmei Wen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Qing Yu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Yanfei Deng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Deshun Shi
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
| | - Fenghua Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, China
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Zhao J, Tang M, Cao J, Ye D, Guo X, Xi J, Zhou Y, Xia Y, Qiao J, Chai R, Yang X, Kang J. Structurally Tunable Reduced Graphene Oxide Substrate Maintains Mouse Embryonic Stem Cell Pluripotency. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1802136. [PMID: 31380157 PMCID: PMC6662269 DOI: 10.1002/advs.201802136] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 03/12/2019] [Indexed: 05/21/2023]
Abstract
Culturing embryonic stem cells (ESCs) in vitro usually requires animal-derived trophoblast cells, which may cause pathogenic and immune reactions; moreover, the poor repeatability between batches hinders the clinical application of ESCs. Therefore, it is essential to synthesize a xenogeneic-free and chemically well-defined biomaterial substrate for maintaining ESC pluripotency. Herein, the effects of structurally tunable reduced graphene oxide (RGO) substrates with different physicochemical properties on ESC pluripotency are studied. Colony formation and CCK-8 assays show that the RGO substrate with an average 30 µm pore size promotes cell survival and proliferation. The unannealed RGO substrate promotes ESC proliferation significantly better than the annealed substrate due to the interfacial hydrophilic groups. The RGO substrate can also maintain ESC for a long time. Additionally, immunofluorescence staining shows that ESCs cultured on an RGO substrate highly express E-cadherin and β-catenin, whereas after being modified by Dickkopf-related protein 1, the RGO substrate is unable to sustain ESC pluripotency. Furthermore, the cell line that interferes with E-cadherin is also unable to maintain pluripotency. These results confirm that the RGO substrate maintains ESC pluripotency by promoting E-cadherin-mediated cell-cell interaction and Wnt signaling.
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Affiliation(s)
- Jinping Zhao
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health HospitalSchool of Life Science and TechnologyTongji UniversityShanghai200092China
- Institute for Regenerative MedicineShanghai East HospitalSchool of Materials Science and EngineeringTongji UniversityShanghai200092China
| | - Mingliang Tang
- Key Laboratory for Developmental Genes and Human DiseaseMinistry of EducationInstitute of Life SciencesJiangsu Province High‐Tech Key Laboratory for Bio‐Medical ResearchSoutheast UniversityNanjing210096China
- Co‐Innovation Center of NeuroregenerationNantong UniversityNantong226001China
- Institute for Stem Cell and RegenerationChinese Academy of ScienceBeijing100864China
| | - Jing Cao
- Institute for Regenerative MedicineShanghai East HospitalSchool of Materials Science and EngineeringTongji UniversityShanghai200092China
| | - Dan Ye
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health HospitalSchool of Life Science and TechnologyTongji UniversityShanghai200092China
| | - Xudong Guo
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health HospitalSchool of Life Science and TechnologyTongji UniversityShanghai200092China
| | - Jiajie Xi
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health HospitalSchool of Life Science and TechnologyTongji UniversityShanghai200092China
| | - Yi Zhou
- Institute for Regenerative MedicineShanghai East HospitalSchool of Materials Science and EngineeringTongji UniversityShanghai200092China
| | - Yuchen Xia
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health HospitalSchool of Life Science and TechnologyTongji UniversityShanghai200092China
| | - Jing Qiao
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health HospitalSchool of Life Science and TechnologyTongji UniversityShanghai200092China
| | - Renjie Chai
- Key Laboratory for Developmental Genes and Human DiseaseMinistry of EducationInstitute of Life SciencesJiangsu Province High‐Tech Key Laboratory for Bio‐Medical ResearchSoutheast UniversityNanjing210096China
- Co‐Innovation Center of NeuroregenerationNantong UniversityNantong226001China
- Institute for Stem Cell and RegenerationChinese Academy of ScienceBeijing100864China
| | - Xiaowei Yang
- Institute for Regenerative MedicineShanghai East HospitalSchool of Materials Science and EngineeringTongji UniversityShanghai200092China
| | - Jiuhong Kang
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Health HospitalSchool of Life Science and TechnologyTongji UniversityShanghai200092China
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Zhang X, Yan H, Wang K, Zhou T, Chen M, Zhu H, Pan C, Zhang E. Goat CTNNB1: mRNA expression profile of alternative splicing in testis and association analysis with litter size. Gene 2018; 679:297-304. [DOI: 10.1016/j.gene.2018.08.061] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/06/2018] [Accepted: 08/20/2018] [Indexed: 01/15/2023]
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Beckert H, Meyer-Martin H, Buhl R, Taube C, Reuter S. The Canonical but Not the Noncanonical Wnt Pathway Inhibits the Development of Allergic Airway Disease. THE JOURNAL OF IMMUNOLOGY 2018; 201:1855-1864. [PMID: 30135183 DOI: 10.4049/jimmunol.1800554] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 07/26/2018] [Indexed: 12/27/2022]
Abstract
Asthma is a syndrome with multifactorial causes, resulting in a variety of different phenotypes. Current treatment options are not curative and are sometimes ineffective in certain disease phenotypes. Therefore, novel therapeutic approaches are required. Recent findings have shown that activation of the canonical Wnt signaling pathway suppresses the development of allergic airway disease. In contrast, the effect of the noncanonical Wnt signaling pathway activation on allergic airway disease is not well described. The aim of this study was to validate the therapeutic effectiveness of Wnt-1-driven canonical Wnt signaling compared with Wnt-5a-driven noncanonical signaling in murine models. In vitro, both ligands were capable of attenuating allergen-specific T cell activation in a dendritic cell-dependent manner. In addition, the therapeutic effects of Wnt ligands were assessed in two different models of allergic airway disease. Application of Wnt-1 resulted in suppression of airway inflammation as well as airway hyperresponsiveness and mucus production. In contrast, administration of Wnt-5a was less effective in reducing airway inflammation or goblet cell metaplasia. These results suggest an immune modulating function for canonical as well as noncanonical Wnt signaling, but canonical Wnt pathway activation appears to be more effective in suppressing allergic airway disease than noncanonical Wnt activation.
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Affiliation(s)
- Hendrik Beckert
- Department of Pulmonary Medicine, University Medical Center Essen-Ruhrlandklinik, Essen, North Rhine-Westphalia 45239, Germany; and
| | - Helen Meyer-Martin
- Department of Pulmonary Medicine, III. Medical Clinic, University Medical Center of the Johannes Gutenberg University, D-55131 Mainz, Germany
| | - Roland Buhl
- Department of Pulmonary Medicine, III. Medical Clinic, University Medical Center of the Johannes Gutenberg University, D-55131 Mainz, Germany
| | - Christian Taube
- Department of Pulmonary Medicine, University Medical Center Essen-Ruhrlandklinik, Essen, North Rhine-Westphalia 45239, Germany; and
| | - Sebastian Reuter
- Department of Pulmonary Medicine, University Medical Center Essen-Ruhrlandklinik, Essen, North Rhine-Westphalia 45239, Germany; and
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15
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Ouyang J, Pan X, Hu Z. The role of aplysia ras homolog I in colon cancer cell invasion and adhesion. Exp Ther Med 2017; 14:5193-5199. [PMID: 29201236 DOI: 10.3892/etm.2017.5122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 05/05/2017] [Indexed: 12/14/2022] Open
Abstract
Aplysia ras homolog I (ARHI) acts as a tumor suppressor in certain cancer cells. However, the role of ARHI in colon cancer development has not previously been reported. The present study aimed to investigate the functional role of ARHI in colon cancer focusing on the aspect of metastasis. Furthermore, the molecular mechanism underlying its function was explored. The present study detected the expression of ARHI in a human colon epithelial cell line and colon cancer cell lines using reverse transcription-quantitative polymerase chain reaction and western blotting analysis. It was demonstrated that ARHI expression was significantly downregulated in colon cancer cell lines compared with the normal colon epithelial cell line (P<0.05). An ARHI-pcDNA3.1 plasmid was transfected into HCT116 cells to overexpress ARHI. The number of invaded cells and the adhesive ability were significantly decreased in the ARHI overexpression group compared with the control group, as determined by cell invasion and adhesion assays (P<0.05). Furthermore, ARHI overexpression led to increased mRNA and protein expression levels of E-cadherin, and decreased mRNA and protein expression levels of N-cadherin and vimentin. Wnt/β-catenin signaling was suppressed in HCT116 cells overexpressing ARHI. Lithium chloride, a wnt/β-catenin signaling activator, was able to attenuate the effect of ARHI on HCT116 cell invasion and adhesion. In addition, the effect of ARHI on epithelial-mesenchymal transition (EMT) in HCT116 cells was reversed by the activation of wnt/β-catenin signaling. In conclusion, the present study provided novel evidence that ARHI could inhibit colon cancer cell invasion and adhesion through suppressing EMT, and these effects were achieved, at least partially, via the suppression of the wnt/β-catenin signaling pathway. The present findings may help in developing novel therapeutic approaches for colon cancer.
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Affiliation(s)
- Jun Ouyang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421001, P.R. China
| | - Xiaohui Pan
- Department of Urology, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421001, P.R. China
| | - Zecheng Hu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of University of South China, Hengyang, Hunan 421001, P.R. China
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16
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Tomizawa M, Shinozaki F, Motoyoshi Y, Sugiyama T, Yamamoto S, Ishige N. Introduction of plasmids into gastric cancer cells by endoscopic ultrasound. Oncol Lett 2017; 13:3127-3130. [PMID: 28521417 DOI: 10.3892/ol.2017.5836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Accepted: 09/06/2016] [Indexed: 11/06/2022] Open
Abstract
Short hairpin RNA of frizzled-2 (shRNA-Fz2) suppresses the cell proliferation of gastric cancer cells. Endoscopic ultrasound (EUS) is considered a suitable method for the introduction of therapeutic plasmids into cells, since the device enables the access and real-time monitoring of gastric cancer tissues. In the present study, plasmids were introduced into cells by sonoporation, as evidenced by the production of H2O2. The production of H2O2 was measured by absorbance of a potassium-starch solution irradiated with EUS. Luciferase activity was analyzed in the cells irradiated with EUS after the addition of a pMetLuc2-control in the media, and cell proliferation was analyzed using a 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium inner salt assay after irradiation with EUS following the addition of shRNA-Fz2. Absorbance levels corresponding to free radical levels were found to be higher in the cells irradiated with EUS. Luciferase activities were found to be significantly higher in the transfected cells (plasmid with Lipofectamine LTX) than in untreated cells and were furthermore found to be higher in MKN45 cells irradiated for 0.5 min than in cells not subjected to irradiation. Luciferase activity was also found to be higher in MKN74 cells irradiated for 2 min than in cells that were not irradiated. Although the cell proliferation of the MKN45 cells tended to be suppressed by irradiation with EUS, this was non-significant suppression, while the cell proliferation of MKN74 cells was found to be suppressed by irradiation with 12 MHz for 2 min (P<0.05). In conclusion, plasmids were introduced into cultured gastric cancer cells by irradiation with EUS due to sonoporation, as evidenced by the production of H2O2; however, the efficiency of the plasmid introduction was low compared with a traditional transfection approach.
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Affiliation(s)
- Minoru Tomizawa
- Department of Gastroenterology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Fuminobu Shinozaki
- Department of Radiology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Yasufumi Motoyoshi
- Department of Neurology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Takao Sugiyama
- Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Shigenori Yamamoto
- Department of Pediatrics, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Naoki Ishige
- Department of Neurosurgery, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
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17
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Ogawa R, Fujita K, Ito K. Mouse embryonic dorsal root ganglia contain pluripotent stem cells that show features similar to embryonic stem cells and induced pluripotent stem cells. Biol Open 2017; 6:602-618. [PMID: 28373172 PMCID: PMC5450311 DOI: 10.1242/bio.021758] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
In the present study, we showed that the dorsal root ganglion (DRG) in the mouse embryo contains pluripotent stem cells (PSCs) that have developmental capacities equivalent to those of embryonic stem (ES) cells and induced pluripotent stem cells. Mouse embryonic DRG cells expressed pluripotency-related transcription factors [octamer-binding transcription factor 4, SRY (sex determining region Y)-box containing gene (Sox) 2, and Nanog] that play essential roles in maintaining the pluripotency of ES cells. Furthermore, the DRG cells differentiated into ectoderm-, mesoderm- and endoderm-derived cells. In addition, these cells produced primordial germ cell-like cells and embryoid body-like spheres. We also showed that the combination of leukemia inhibitor factor/bone morphogenetic protein 2/fibroblast growth factor 2 effectively promoted maintenance of the pluripotency of the PSCs present in DRGs, as well as that of neural crest-derived stem cells (NCSCs) in DRGs, which were previously shown to be present there. Furthermore, the expression of pluripotency-related transcription factors in the DRG cells was regulated by chromodomain helicase DNA-binding protein 7 and Sox10, which are indispensable for the formation of NCSCs, and vice versa. These findings support the possibility that PSCs in mouse embryonic DRGs are NCSCs.
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Affiliation(s)
- Ryuhei Ogawa
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kyohei Fujita
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kazuo Ito
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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18
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Lugert S, Kremer T, Jagasia R, Herrmann A, Aigner S, Giachino C, Mendez-David I, Gardier AM, Carralot JP, Meistermann H, Augustin A, Saxe MD, Lamerz J, Duran-Pacheco G, Ducret A, Taylor V, David DJ, Czech C. Glypican-2 levels in cerebrospinal fluid predict the status of adult hippocampal neurogenesis. Sci Rep 2017; 7:46543. [PMID: 28440309 PMCID: PMC5404329 DOI: 10.1038/srep46543] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 03/17/2017] [Indexed: 12/20/2022] Open
Abstract
Adult hippocampal neurogenesis is a remarkable form of brain plasticity through which new neurons are generated throughout life. Despite its important roles in cognition and emotion and its modulation in various preclinical disease models, the functional importance of adult hippocampal neurogenesis in human health has not been revealed because of a lack of tools for monitoring adult neurogenesis in vivo. Therefore, we performed an unbiased proteomics screen to identify novel proteins expressed during neuronal differentiation using a human neural stem cell model, and we identified the proteoglycan Glypican-2 (Gpc2) as a putative secreted marker of immature neurons. Exogenous Gpc2 binds to FGF2 and inhibits FGF2-induced neural progenitor cell proliferation. Gpc2 is enriched in neurogenic regions of the adult brain. Its expression is increased by physiological stimuli that increase hippocampal neurogenesis and decreased in transgenic models in which neurogenesis is selectively ablated. Changes in neurogenesis also result in changes in Gpc2 protein level in cerebrospinal fluid (CSF). Gpc2 is detectable in adult human CSF, and first pilot experiments with a longitudinal cohort indicate a decrease over time. Thus, Gpc2 may serve as a potential marker to monitor adult neurogenesis in both animal and human physiology and disease, warranting future studies.
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Affiliation(s)
- S Lugert
- Roche Pharmaceutical Research and Early Development, NORD Discovery &Translational Area, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - T Kremer
- Roche Pharmaceutical Research and Early Development, NORD Discovery &Translational Area, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - R Jagasia
- Roche Pharmaceutical Research and Early Development, NORD Discovery &Translational Area, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - A Herrmann
- Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - S Aigner
- Roche Pharmaceutical Research and Early Development, NORD Discovery &Translational Area, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - C Giachino
- Embryology and Stem Cell Biology, Department of Biomedicine, University of Basel, Mattenstrasse 28, CH-4058 Basel, Switzerland
| | - I Mendez-David
- CESP/UMR-S 1178, Univ. Paris-Sud, Fac. Pharmacie, INSERM, Université Paris-Saclay, Chatenay Malabry, 92290, France
| | - A M Gardier
- CESP/UMR-S 1178, Univ. Paris-Sud, Fac. Pharmacie, INSERM, Université Paris-Saclay, Chatenay Malabry, 92290, France
| | - J P Carralot
- Roche Pharmaceutical Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - H Meistermann
- Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - A Augustin
- Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - M D Saxe
- Roche Pharmaceutical Research and Early Development, NORD Discovery &Translational Area, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - J Lamerz
- Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - G Duran-Pacheco
- Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - A Ducret
- Roche Pharmaceutical Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - V Taylor
- Embryology and Stem Cell Biology, Department of Biomedicine, University of Basel, Mattenstrasse 28, CH-4058 Basel, Switzerland
| | - D J David
- CESP/UMR-S 1178, Univ. Paris-Sud, Fac. Pharmacie, INSERM, Université Paris-Saclay, Chatenay Malabry, 92290, France
| | - C Czech
- Roche Pharmaceutical Research and Early Development, NORD Discovery &Translational Area, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, 4070 Basel, Switzerland
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Chin AM, Hill DR, Aurora M, Spence JR. Morphogenesis and maturation of the embryonic and postnatal intestine. Semin Cell Dev Biol 2017; 66:81-93. [PMID: 28161556 DOI: 10.1016/j.semcdb.2017.01.011] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 01/28/2017] [Accepted: 01/30/2017] [Indexed: 12/12/2022]
Abstract
The intestine is a vital organ responsible for nutrient absorption, bile and waste excretion, and a major site of host immunity. In order to keep up with daily demands, the intestine has evolved a mechanism to expand the absorptive surface area by undergoing a morphogenetic process to generate finger-like units called villi. These villi house specialized cell types critical for both absorbing nutrients from food, and for protecting the host from commensal and pathogenic microbes present in the adult gut. In this review, we will discuss mechanisms that coordinate intestinal development, growth, and maturation of the small intestine, starting from the formation of the early gut tube, through villus morphogenesis and into early postnatal life when the intestine must adapt to the acquisition of nutrients through food intake, and to interactions with microbes.
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Affiliation(s)
- Alana M Chin
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - David R Hill
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Megan Aurora
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Jason R Spence
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, United States; Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI, United States; Center for Organogenesis, University of Michigan Medical School, Ann Arbor, MI, United States.
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20
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Distinct hydrophobic “patches” in the N- and C-tails of beta-catenin contribute to nuclear transport. Exp Cell Res 2016; 348:132-145. [DOI: 10.1016/j.yexcr.2016.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 09/15/2016] [Accepted: 09/16/2016] [Indexed: 02/01/2023]
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21
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Sulfated glycosaminoglycans: their distinct roles in stem cell biology. Glycoconj J 2016; 34:725-735. [DOI: 10.1007/s10719-016-9732-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/15/2016] [Accepted: 09/20/2016] [Indexed: 01/27/2023]
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22
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Wnt/β-catenin signaling promotes self-renewal and inhibits the primed state transition in naïve human embryonic stem cells. Proc Natl Acad Sci U S A 2016; 113:E6382-E6390. [PMID: 27698112 PMCID: PMC5081574 DOI: 10.1073/pnas.1613849113] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
In both mice and humans, pluripotent stem cells (PSCs) exist in at least two distinct states of pluripotency, known as the naïve and primed states. Our understanding of the intrinsic and extrinsic factors that enable PSCs to self-renew and to transition between different pluripotent states is important for understanding early development. In mouse embryonic stem cells (mESCs), Wnt proteins stimulate mESC self-renewal and support the naïve state. In human embryonic stem cells (hESCs), Wnt/β-catenin signaling is active in naïve-state hESCs and is reduced or absent in primed-state hESCs. However, the role of Wnt/β-catenin signaling in naïve hESCs remains largely unknown. Here, we demonstrate that inhibition of the secretion of Wnts or inhibition of the stabilization of β-catenin in naïve hESCs reduces cell proliferation and colony formation. Moreover, we show that addition of recombinant Wnt3a partially rescues cell proliferation in naïve hESCs caused by inhibition of Wnt secretion. Notably, inhibition of Wnt/β-catenin signaling in naïve hESCs did not cause differentiation. Instead, it induced primed hESC-like proteomic and metabolic profiles. Thus, our results suggest that naïve hESCs secrete Wnts that activate autocrine or paracrine Wnt/β-catenin signaling to promote efficient self-renewal and inhibit the transition to the primed state.
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Qi YF, Wu L, Li ZQ, Wu ML, Wang HF, Chan KY, Lu LL, Cai SH, Wang HS, Du J. Nodal signaling modulates the expression of Oct-4 via nuclear translocation of β-catenin in lung and prostate cancer cells. Arch Biochem Biophys 2016; 608:34-41. [PMID: 27592306 DOI: 10.1016/j.abb.2016.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/02/2016] [Accepted: 07/04/2016] [Indexed: 11/16/2022]
Abstract
Nodal is a member of transforming growth factor beta (TGF-β) superfamily. Nodal promotes the self-renewal of human cancer stem cells (CSCs) and triggers carcinogenesis of human cancers via an autocrine manner through Smad2/3 pathway. In our study, generation of Nodal-overexpressed cancer cells was constructed, and the effect of Nodal on the stem cell marker Oct-4 was evaluated by overexpression or blocked Nodal/ALKs signaling pathway in non-small cell lung cancer cells A549 and prostate cancer cells PC3. Functionally, Nodal also increased the proliferation via the β-catenin nuclear translocation. This increase was attributed to GSK-3β dephosphorylating, and activin receptor-like kinase 4/7 (ALK4/7) played a major role in human cancer cells. Our study provides a positive understanding of Nodal function in cancer cells and suggests a potential novel target for clinical therapeutic research.
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Affiliation(s)
- Yi-Fei Qi
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China
| | - Long Wu
- Department of Pharmacology, School of Pharmaceutical Sciences, Jinan University, Guangzhou 510632, China
| | - Zi-Qian Li
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China
| | - Meng-Ling Wu
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China
| | - Hai-Fang Wang
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China
| | - Ka-Ying Chan
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China
| | - Lin-Lin Lu
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China
| | - Shao-Hui Cai
- Department of Pharmacology, School of Pharmaceutical Sciences, Jinan University, Guangzhou 510632, China
| | - Hong-Sheng Wang
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China.
| | - Jun Du
- Department of Microbial and Biochemical Pharmacy, School of Pharmaceutical Sciences, Sun Yat-sen University, No. 132 Waihuandong Road, University Town, Guangzhou 510006, China.
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Murine matrix metalloproteinase-20 overexpression stimulates cell invasion into the enamel layer via enhanced Wnt signaling. Sci Rep 2016; 6:29492. [PMID: 27403713 PMCID: PMC4941722 DOI: 10.1038/srep29492] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 06/17/2016] [Indexed: 12/18/2022] Open
Abstract
Matrix metalloproteinase-20 (MMP20) is expressed by ameloblasts in developing teeth and MMP20 mutations cause enamel malformation. We established a stably transfected Tet-Off Mmp20-inducible ameloblast-lineage cell line and found that MMP20 expression promoted cell invasion. Previously, we engineered transgenic mice (Tg) that drive Mmp20 expression and showed that Mmp20(+/+)Tg mice had soft enamel. Here we asked if Mmp20 overexpression disrupts ameloblast function. Incisors from Mmp20(+/+) mice expressing the Mmp20 Tg had a striking cell infiltrate which nearly replaced the entire enamel layer. A thin layer of enamel-like material remained over the dentin and at the outer tooth surface, but between these regions were invading fibroblasts and epithelial cells that surrounded ectopic bone-like calcifications. Mmp20(+/+)Tg mice had decreased enamel organ cadherin levels compared to the Mmp20 ablated and WT mice and, instead of predominantly locating adjacent to the ameloblast cell membrane, β-catenin was predominantly present within the nuclei of invading cells. Our data suggest that increased cadherin cleavage by transgenic MMP20 in the WT background releases excess β-catenin, which translocates to ameloblast nuclei to promote cell migration/invasion. Therefore, we conclude that MMP20 plays a role in normal ameloblast migration through tightly controlled Wnt signaling and that MMP20 overexpression disrupts this process.
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25
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Ouyang W, Zhang S, Yang B, Yang C, Zhang J, Zhou F, Xie C. β-catenin is regulated by USP9x and mediates resistance to TRAIL-induced apoptosis in breast cancer. Oncol Rep 2015; 35:717-24. [PMID: 26717875 DOI: 10.3892/or.2015.4463] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 09/04/2015] [Indexed: 01/29/2023] Open
Abstract
To investigate the regulatory mechanisms of decoy receptor expression in TRAIL-resistant breast cancer MCF-7 cells, cytotoxicity and apoptosis assays were applied to examine sensitivity to TRAIL in breast cancer cells. Immunofluorescence and immunoprecipitation were used to detect the co-localization and interaction of USP9x and β-catenin. Luciferase assay was used to examine activity of the DcR1/DcR2/OPG reporter. Overexpression/silencing of β-catenin was performed to confirm β-catenin mediated transcription of the decoy receptors. Additionally, silencing of USP9x was performed to prove that USP9X stabilizes β-catenin and mediates TRAIL-resistance. It was found that USP9x interacted with β-catenin and inhibited the degradation of β-catenin through the deubiquitination of β-catenin. Luciferase reporter assays showed induction of DcR1/DcR2/OPG reporter activity observed upon co-transfection of β-catenin and Tcf-4. The overexpression/silencing of β-catenin further confirmed the role of β-catenin in the regulation of transcription of the decoy receptors. Silencing of USP9x directly evidenced that USP9x affected the protein expression level of β-catenin, the transcription level of the decoy receptors, and reversed TRAIL-resistance of MCF-7 cells. In conclusion, USP9x interacted with and stabilized β-catenin through deubiquitination to mediate transcription of the decoy receptors in breast cancer cells. Our results offer new insights into the mechanisms of resistance to TRAIL, and USP9x could potentially be a therapeutic target for TRAIL-resistant breast cancers.
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Affiliation(s)
- Wen Ouyang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Shimin Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Bo Yang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Chunxu Yang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Junhong Zhang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Fuxiang Zhou
- Hubei Key Laboratory of Tumor Biological Behaviors, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Conghua Xie
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China
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26
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Tomizawa M, Shinozaki F, Motoyoshi Y, Sugiyama T, Yamamoto S, Ishige N. Suppression of hepatocellular carcinoma cell proliferation by short hairpin RNA of frizzled 2 with Sonazoid-enhanced irradiation. Int J Oncol 2015; 48:123-9. [PMID: 26648389 DOI: 10.3892/ijo.2015.3259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 11/05/2015] [Indexed: 11/06/2022] Open
Abstract
Short-hairpin RNA of frizzled-2 (shRNA-Fz2) is known to suppress the proliferation of hepatocellular carcinoma (HCC) cells; however, its effect on HCC cell motility is unknown. In this study, suppression of HCC cell motility by shRNA-Fz2 was analyzed, and introduction of shRNA-Fz2 into HCC cells was facilitated with ultrasound (US) irradiation generated from a diagnostic US device, which was enhanced by the contrast-enhanced US reagent Sonazoid. The HCC cell lines HLF and PLC/PRF/5 that were transfected with shRNA-Fz2 were plated to form monolayers, following which the cell monolayers were scratched with a sterile razor. After 48 h, the cells were stained with hematoxylin and eosin, and the distance between the growing edge of the cell layer and the scratch lines was measured. Total RNA from the cells was isolated and subjected to real-time quantitative PCR to quantify matrix metalloproteinase 9 expression at 48 h after transfection of shRNA-Fz2. Starch-iodide method was applied to analyze the generation of H2O2 following US irradiation with the addition of Sonazoid in the liquid, and cell proliferation was analyzed 72 h later. The distances between the growing edge of the cell layer and the scratch lines and MMP9 expression levels were significantly decreased with transfection of shRNA-Fz2 (P<0.05). In the starch-iodide method, absorbance significantly decreased with the addition of Sonazoid (P<0.05), which suggested that US irradiation with Sonazoid generated H2O2 and enhanced sonoporation. ShRNA-Fz2 suppressed cell proliferation of both cell lines at a mechanical index of 0.4. Motility of HLF cells and PLC/PRF/5 cells was suppressed by shRNA-FZ2. Sonazoid enhanced sonoporation of the cells with the diagnostic US device and the suppression of proliferation of both HCC cell lines by shRNA-Fz2.
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Affiliation(s)
- Minoru Tomizawa
- Department of Gastroenterology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Fuminobu Shinozaki
- Department of Radiology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Yasufumi Motoyoshi
- Department of Neurology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Takao Sugiyama
- Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Shigenori Yamamoto
- Department of Pediatrics, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Naoki Ishige
- Department of Neurosurgery, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
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27
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Tomizawa M, Shinozaki F, Motoyoshi Y, Sugiyama T, Yamamoto S, Ishige N. FH535 suppresses the proliferation and motility of hepatocellular carcinoma cells. Int J Oncol 2015; 48:110-4. [PMID: 26530115 DOI: 10.3892/ijo.2015.3220] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 10/09/2015] [Indexed: 11/06/2022] Open
Abstract
The Wnt signaling pathway is activated in hepatocellular carcinoma (HCC). This study investigated the effects of FH535, an inhibitor of the Wnt signaling pathway, on the proliferation and motility of HCC cells. HLF cells and PLC/PRF/5 cells, HCC cells, were subjected to 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt (MTS) assay with the addition of FH535. RNA was isolated from the cells and subjected to real-time quantitative PCR. Hematoxylin and eosin (H&E) staining was performed to analyze apoptosis. A scratch assay was performed to analyze cell motility. Cell proliferation significantly decreased (P<0.05). The expression levels of cyclin D1 significantly decreased in both cell lines (P<0.05). Pyknotic nuclei were observed in the cells cultured with FH535 (50 µM). In the scratch assay, the distance between the growing edges of cells and the scratched line significantly decreased with the addition of FH535 at 50 µM (P<0.05). The expression levels of matrix metalloproteinase 9 significantly decreased at 50 µM (P<0.05). FH535 suppressed the proliferation of HCC cells by downregulating the expression of cyclin D1 and by inducing apoptosis. Further, it suppressed cell motility by downregulating the expression of matrix metalloproteinase.
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Affiliation(s)
- Minoru Tomizawa
- Department of Gastroenterology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Fuminobu Shinozaki
- Department of Radiology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Yasufumi Motoyoshi
- Department of Neurology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Takao Sugiyama
- Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Shigenori Yamamoto
- Department of Pediatrics, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Naoki Ishige
- Department of Neurosurgery, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
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28
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Krivega M, Essahib W, Van de Velde H. WNT3 and membrane-associated β-catenin regulate trophectoderm lineage differentiation in human blastocysts. Mol Hum Reprod 2015; 21:711-22. [DOI: 10.1093/molehr/gav036] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 06/22/2015] [Indexed: 12/29/2022] Open
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29
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Huang G, Ye S, Zhou X, Liu D, Ying QL. Molecular basis of embryonic stem cell self-renewal: from signaling pathways to pluripotency network. Cell Mol Life Sci 2015; 72:1741-57. [PMID: 25595304 DOI: 10.1007/s00018-015-1833-2] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Revised: 12/17/2014] [Accepted: 01/08/2015] [Indexed: 12/18/2022]
Abstract
Embryonic stem cells (ESCs) can be maintained in culture indefinitely while retaining the capacity to generate any type of cell in the body, and therefore not only hold great promise for tissue repair and regeneration, but also provide a powerful tool for modeling human disease and understanding biological development. In order to fulfill the full potential of ESCs, it is critical to understand how ESC fate, whether to self-renew or to differentiate into specialized cells, is regulated. On the molecular level, ESC fate is controlled by the intracellular transcriptional regulatory networks that respond to various extrinsic signaling stimuli. In this review, we discuss and compare important signaling pathways in the self-renewal and differentiation of mouse, rat, and human ESCs with an emphasis on how these pathways integrate into ESC-specific transcription circuitries. This will be beneficial for understanding the common and conserved mechanisms that govern self-renewal, and for developing novel culture conditions that support ESC derivation and maintenance.
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Affiliation(s)
- Guanyi Huang
- Center for Stem Cell and Translational Medicine, School of Life Sciences, Anhui University, Hefei, 230601, PR China
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30
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Tomizawa M, Shinozaki F, Motoyoshi Y, Sugiyama T, Yamamoto S, Ishige N. Gastric cancer cell proliferation is suppressed by frizzled-2 short hairpin RNA. Int J Oncol 2015; 46:1018-24. [PMID: 25586465 DOI: 10.3892/ijo.2015.2830] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 12/29/2014] [Indexed: 11/06/2022] Open
Abstract
In order to identify novel targets for the molecular therapy of gastric cancer (GC), we investigated the mRNA and protein expression of frizzled-2 (Fz2), a Wnt signaling pathway receptor. Reverse-transcriptase polymerase chain reaction (PCR) amplification was utilized to determine the expression patterns of Fz genes in normal stomach and in the GC cell lines MKN45 and MKN74. Immunostaining was performed on surgical specimens of GC using an antibody against Fz2. The 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2- (4-sulfophenyl)-2H-tetrazolium inner salt (MTS) assay was performed on MKN45 cells and MKN74 cells transfected with Fz2 short-hairpin (sh) RNA. Cell motility was analyzed by scratch assay following Fz2 shRNA. Real-time quantitative PCR was performed to analyze the expression levels of cyclin D1 and matrix metallopeptidase 9 (MMP-9). Fz1, 3, 6 and 8 were expressed in normal stomach, and in MKN45 and MKN74 cells. Fz2 was expressed in normal stomach and in MKN45, but not in MKN74 cells. Well-differentiated GC tissue was weakly positive for Fz2 in cell membranes. Fz2 was positive in both the cell membrane and cytoplasm of GC tissues of moderately differentiated and poorly differentiated adenocarcinoma. Signet ring cells were positive for cytoplasmic Fz2. Proliferation of MKN45 and MKN74 cells was suppressed by Fz2 shRNA, and a scratch assay demonstrated that Fz2 shRNA suppressed also MKN45 and MKN74 cell motility. Furthermore, Fz2 shRNA application led to downregulated mRNA expression of both cyclin D1 and MMP-9. Fz2, 3, 6 and 8 were expressed in normal stomach, and in MKN45 and MKN74 GC cells. Fz2 shRNA suppressed cell proliferation and motility of MKN45 and MKN74 cells, and downregulated cyclin D1 and MMP-9 expression in these GC cell lines.
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Affiliation(s)
- Minoru Tomizawa
- Department of Gastroenterology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Fuminobu Shinozaki
- Department of Radiology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Yasufumi Motoyoshi
- Department of Neurology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Takao Sugiyama
- Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Shigenori Yamamoto
- Department of Pediatrics, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
| | - Naoki Ishige
- Department of Neurosurgery, National Hospital Organization, Shimoshizu Hospital, Yotsukaido City, Chiba 284-0003, Japan
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31
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Tomizawa M, Shinozaki F, Motoyoshi Y, Sugiyama T, Yamamoto S, Sueishi M. Short hairpin RNA of frizzled-2 suppresses the proliferation of hepatocellular carcinoma cells. Oncol Lett 2014; 8:1519-1522. [PMID: 25202360 PMCID: PMC4156231 DOI: 10.3892/ol.2014.2408] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 07/15/2014] [Indexed: 11/22/2022] Open
Abstract
In the present study, Frizzled-2 (Fz2), a receptor of the Wnt ligand, was investigated as a potential target of molecular therapy for hepatocellular carcinoma (HCC). Quantitative polymerase chain reaction (PCR) was performed to determine the expression levels of Fz2. A surgical specimen of HCC was immunostained with an Fz2 antibody. A 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium inner salt assay was performed on HCC cell lines, including HLF and Hep3B, 72 h after the transfection of the short hairpin (sh)RNA of Fz2 (shRNA-Fz2). RNA was isolated from the Hep3B and HLF cells 48 h after transfection and subjected to quantitative PCR. All cell lines had elevated levels of Fz2 compared with those in an adult liver. The highest and lowest expression levels of Fz2 were 246.9±15.7 in the HLF cells and 5.8±1.4 in the Hep3B cells, respectively. Fz2 was expressed in the tumorous HCC tissue, but not in the surrounding non-tumorous tissue. Cell proliferation was suppressed to 28.6±6.4% in the HLF cells and to 29.8±4.3% in the Hep3B cells at 100 ng shRNA-Fz2 per well. Levels of cyclin D1 expression decreased to 65.2±5.9% in the HLF cells and to 60.8±14.6% in the Hep3B cells at 2.5 μg per well. In conclusion, Fz2 was upregulated in the HCC cells. shRNA-Fz2 suppressed the proliferation of the Hep3B and HLF cells, decreasing Fz2 expression. As it was not expressed in the surrounding non-tumorous tissue, Fz2 may be an ideal molecular therapeutic target for HCC.
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Affiliation(s)
- Minoru Tomizawa
- Department of Gastroenterology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Fuminobu Shinozaki
- Department of Radiology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Yasufumi Motoyoshi
- Department of Neurology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Takao Sugiyama
- Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Shigenori Yamamoto
- Department of Pediatrics, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
| | - Makoto Sueishi
- Department of Rheumatology, National Hospital Organization, Shimoshizu Hospital, Yotsukaido, Chiba 284-0003, Japan
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32
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Fujita K, Ogawa R, Kawawaki S, Ito K. Roles of chromatin remodelers in maintenance mechanisms of multipotency of mouse trunk neural crest cells in the formation of neural crest-derived stem cells. Mech Dev 2014; 133:126-45. [PMID: 24836203 DOI: 10.1016/j.mod.2014.05.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/28/2014] [Accepted: 05/02/2014] [Indexed: 01/05/2023]
Abstract
We analyzed roles of two chromatin remodelers, Chromodomain Helicase DNA-binding protein 7 (CHD7) and SWItch/Sucrose NonFermentable-B (SWI/SNF-B), and Bone Morphogenetic Protein (BMP)/Wnt signaling in the maintenance of the multipotency of mouse trunk neural crest cells, leading to the formation of mouse neural crest-derived stem cells (mouse NCSCs). CHD7 was expressed in the undifferentiated neural crest cells and in the dorsal root ganglia (DRG) and sciatic nerve, typical tissues containing NCSCs. BMP/Wnt signaling stimulated the expression of CHD7 and participated in maintaining the multipotency of neural crest cells. Furthermore, the promotion of CHD7 expression maintained the multipotency of these cells. The inhibition of CHD7 and SWI/SNF-B expression significantly suppressed the maintenance of the multipotency of these cells. In addition, BMP/Wnt treatment promoted CHD7 expression and caused the increase of the percentage of multipotent cells in DRG. Thus, the present data suggest that the chromatin remodelers as well as BMP/Wnt signaling play essential roles in the maintenance of the multipotency of mouse trunk neural crest cells and in the formation of mouse NCSCs.
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MESH Headings
- Animals
- Apoptosis
- Bone Morphogenetic Proteins/metabolism
- Cell Differentiation
- Cell Proliferation
- Cells, Cultured
- Chromatin Assembly and Disassembly
- Chromosomal Proteins, Non-Histone/genetics
- Chromosomal Proteins, Non-Histone/metabolism
- DNA-Binding Proteins/antagonists & inhibitors
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Embryonic Stem Cells/cytology
- Embryonic Stem Cells/metabolism
- Ganglia, Spinal/cytology
- Ganglia, Spinal/embryology
- Ganglia, Spinal/metabolism
- Gene Expression Regulation, Developmental
- Mice
- Multipotent Stem Cells/cytology
- Multipotent Stem Cells/metabolism
- Neural Crest/cytology
- Neural Crest/metabolism
- Neural Stem Cells/cytology
- Neural Stem Cells/metabolism
- RNA, Small Interfering/genetics
- Receptors, Nerve Growth Factor/genetics
- Receptors, Nerve Growth Factor/metabolism
- SOXE Transcription Factors/genetics
- SOXE Transcription Factors/metabolism
- Sciatic Nerve/cytology
- Sciatic Nerve/embryology
- Sciatic Nerve/metabolism
- Signal Transduction
- Transcription Factors/genetics
- Transcription Factors/metabolism
- Wnt Signaling Pathway
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Affiliation(s)
- Kyohei Fujita
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Ryuhei Ogawa
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Syunsaku Kawawaki
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kazuo Ito
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
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Jamieson C, Sharma M, Henderson BR. Targeting the β-catenin nuclear transport pathway in cancer. Semin Cancer Biol 2014; 27:20-9. [PMID: 24820952 DOI: 10.1016/j.semcancer.2014.04.012] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 04/29/2014] [Indexed: 12/20/2022]
Abstract
The nuclear localization of specific proteins is critical for cellular processes such as cell division, and in recent years perturbation of the nuclear transport cycle of key proteins has been linked to cancer. In particular, specific gene mutations can alter nuclear transport of tumor suppressing and oncogenic proteins, leading to cell transformation or cancer progression. This review will focus on one such factor, β-catenin, a key mediator of the canonical wnt signaling pathway. In response to a wnt stimulus or specific gene mutations, β-catenin is stabilized and translocates to the nucleus where it binds TCF/LEF-1 transcription factors to transactivate genes that drive tumor formation. Moreover, the nuclear import and accumulation of β-catenin correlates with clinical tumor grade. Recent evidence suggests that the primary nuclear transport route of β-catenin is independent of the classical Ran/importin import machinery, and that β-catenin directly contacts the nuclear pore complex to self-regulate its own entry into the nucleus. Here we propose that the β-catenin nuclear import pathway may provide an opportunity for identification of specific drug targets and inhibition of β-catenin nuclear function, much like the current screening of drugs that block binding of β-catenin to LEF-1/TCFs. Here we will discuss the diverse mechanisms regulating nuclear localization of β-catenin and their potential as targets for anticancer agent development.
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Affiliation(s)
- Cara Jamieson
- Westmead Institute for Cancer Research, The University of Sydney, Westmead Millennium Institute at Westmead Hospital, Westmead, NSW 2145, Australia
| | - Manisha Sharma
- Westmead Institute for Cancer Research, The University of Sydney, Westmead Millennium Institute at Westmead Hospital, Westmead, NSW 2145, Australia
| | - Beric R Henderson
- Westmead Institute for Cancer Research, The University of Sydney, Westmead Millennium Institute at Westmead Hospital, Westmead, NSW 2145, Australia.
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34
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Aulicino F, Theka I, Ombrato L, Lluis F, Cosma MP. Temporal perturbation of the Wnt signaling pathway in the control of cell reprogramming is modulated by TCF1. Stem Cell Reports 2014; 2:707-20. [PMID: 24936456 PMCID: PMC4050487 DOI: 10.1016/j.stemcr.2014.04.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 04/04/2014] [Accepted: 04/07/2014] [Indexed: 01/01/2023] Open
Abstract
Cyclic activation of the Wnt/β-catenin signaling pathway controls cell fusion-mediated somatic cell reprogramming. TCFs belong to a family of transcription factors that, in complex with β-catenin, bind and transcriptionally regulate Wnt target genes. Here, we show that Wnt/β-catenin signaling needs to be off during the early reprogramming phases of mouse embryonic fibroblasts (MEFs) into iPSCs. In MEFs undergoing reprogramming, senescence genes are repressed and mesenchymal-to-epithelial transition is favored. This is correlated with a repressive activity of TCF1, which contributes to the silencing of Wnt/β-catenin signaling at the onset of reprogramming. In contrast, the Wnt pathway needs to be active in the late reprogramming phases to achieve successful reprogramming. In conclusion, continued activation or inhibition of the Wnt/β-catenin signaling pathway is detrimental to the reprogramming of MEFs; instead, temporal perturbation of the pathway is essential for efficient reprogramming, and the “Wnt-off” state can be considered an early reprogramming marker. Time-dependent perturbation of Wnt pathway enhances reprogramming TCF1 acts as repressor in cells undergoing reprogramming TCF1 represses senescence genes and promotes MET “Wnt-off” state is an early reprogramming marker
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Affiliation(s)
- Francesco Aulicino
- Centre for Genomic Regulation (CRG), Dr. Aiguader 88, 08003 Barcelona, Spain ; Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
| | - Ilda Theka
- Centre for Genomic Regulation (CRG), Dr. Aiguader 88, 08003 Barcelona, Spain ; Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
| | - Luigi Ombrato
- Centre for Genomic Regulation (CRG), Dr. Aiguader 88, 08003 Barcelona, Spain ; Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
| | - Frederic Lluis
- Centre for Genomic Regulation (CRG), Dr. Aiguader 88, 08003 Barcelona, Spain ; Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
| | - Maria Pia Cosma
- Centre for Genomic Regulation (CRG), Dr. Aiguader 88, 08003 Barcelona, Spain ; Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain ; Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluis Companys 23, 08010 Barcelona, Spain
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The States of Pluripotency: Pluripotent Lineage Development in the Embryo and in the Dish. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/208067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The pluripotent cell lineage of the embryo comprises a series of temporally and functionally distinct intermediary cell states, the epiblast precursor cell of the newly formed blastocyst, the epiblast population of the inner cell mass, and the early and late epiblast of the postimplantation embryo, referred to here as early and late primitive ectoderm. Pluripotent cell populations representative of the embryonic populations can be formed in culture. Although multiple pluripotent cell states are now recognised, little is known about the signals and pathways that progress cells from the epiblast precursor cell to the late primitive ectoderm in the embryo or in culture. The characterisation of cell states is most advanced in mouse where conditions for culturing distinct pluripotent cell states are well established and embryonic material is accessible. This review will focus on the pluripotent cell states present during embryonic development in the mouse and what is known of the mechanisms that regulate the progression of the lineage from the epiblast precursor cell and the ground state of pluripotency to the late primitive ectoderm present immediately prior to cell differentiation.
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Matsushita T, Fujimoto M. Scleroderma: recent lessons from murine models and implications for future therapeutics. ACTA ACUST UNITED AC 2014. [DOI: 10.1586/17469872.2013.835924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Anderegg A, Lin HP, Chen JA, Caronia-Brown G, Cherepanova N, Yun B, Joksimovic M, Rock J, Harfe BD, Johnson R, Awatramani R. An Lmx1b-miR135a2 regulatory circuit modulates Wnt1/Wnt signaling and determines the size of the midbrain dopaminergic progenitor pool. PLoS Genet 2013; 9:e1003973. [PMID: 24348261 PMCID: PMC3861205 DOI: 10.1371/journal.pgen.1003973] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Accepted: 10/09/2013] [Indexed: 11/19/2022] Open
Abstract
MicroRNAs regulate gene expression in diverse physiological scenarios. Their role in the control of morphogen related signaling pathways has been less studied, particularly in the context of embryonic Central Nervous System (CNS) development. Here, we uncover a role for microRNAs in limiting the spatiotemporal range of morphogen expression and function. Wnt1 is a key morphogen in the embryonic midbrain, and directs proliferation, survival, patterning and neurogenesis. We reveal an autoregulatory negative feedback loop between the transcription factor Lmx1b and a newly characterized microRNA, miR135a2, which modulates the extent of Wnt1/Wnt signaling and the size of the dopamine progenitor domain. Conditional gain of function studies reveal that Lmx1b promotes Wnt1/Wnt signaling, and thereby increases midbrain size and dopamine progenitor allocation. Conditional removal of Lmx1b has the opposite effect, in that expansion of the dopamine progenitor domain is severely compromised. Next, we provide evidence that microRNAs are involved in restricting dopamine progenitor allocation. Conditional loss of Dicer1 in embryonic stem cells (ESCs) results in expanded Lmx1a/b+ progenitors. In contrast, forced elevation of miR135a2 during an early window in vivo phenocopies the Lmx1b conditional knockout. When En1::Cre, but not Shh::Cre or Nes::Cre, is used for recombination, the expansion of Lmx1a/b+ progenitors is selectively reduced. Bioinformatics and luciferase assay data suggests that miR135a2 targets Lmx1b and many genes in the Wnt signaling pathway, including Ccnd1, Gsk3b, and Tcf7l2. Consistent with this, we demonstrate that this mutant displays reductions in the size of the Lmx1b/Wnt1 domain and range of canonical Wnt signaling. We posit that microRNA modulation of the Lmx1b/Wnt axis in the early midbrain/isthmus could determine midbrain size and allocation of dopamine progenitors. Since canonical Wnt activity has recently been recognized as a key ingredient for programming ESCs towards a dopaminergic fate in vitro, these studies could impact the rational design of such protocols.
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Affiliation(s)
- Angela Anderegg
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Hsin-Pin Lin
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Jun-An Chen
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Giuliana Caronia-Brown
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Natalya Cherepanova
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Beth Yun
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Milan Joksimovic
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
| | - Jason Rock
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, United States of America
| | - Brian D. Harfe
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, United States of America
| | - Randy Johnson
- Department of Biochemistry and Molecular Biology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Rajeshwar Awatramani
- Northwestern University Feinberg School of Medicine, Department of Neurology and Center for Genetic Medicine, Chicago, Illinois, United States of America
- * E-mail:
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Tomizawa M, Shinozaki F, Motoyoshi Y, Sugiyama T, Yamamoto S, Sueishi M, Yoshida T. Niclosamide suppresses Hepatoma cell proliferation via the Wnt pathway. Onco Targets Ther 2013; 6:1685-93. [PMID: 24273411 PMCID: PMC3836661 DOI: 10.2147/ott.s50065] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Background The Wnt pathway plays an important role in Hepatocarcinogenesis. We analyzed the association of the Wnt pathway with the proliferation of hepatoma cells using Wnt3a and niclosamide, a drug used to treat tapeworm infection. Methods We performed an MTS assay to determine whether Wnt3a stimulated proliferation of Huh-6 and Hep3B human hepatoma cell lines after 72 hours of incubation with Wnt3a in serum-free medium. The cells were subjected to hematoxylin and eosin staining and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) after 48 hours of incubation. RNA was isolated 48 hours after addition of Wnt3a or niclosamide, and cyclin D1 expression levels were analyzed by real-time quantitative polymerase chain reaction. The promoter activity of T-cell factor was analyzed by luciferase assay 48 hours after transfection of TOPflash. Western blot analysis was performed with antibodies against β-catenin, dishevelled 2, and cyclin D1. Results Cell proliferation increased with Wnt3a. Niclosamide suppressed proliferation with or without Wnt3a. Hematoxylin and eosin and TUNEL staining suggested that apoptosis occurred in cells with niclosamide. Cyclin D1 was upregulated in the presence of Wnt3a and downregulated with addition of niclosamide. The promoter activity of T-cell factor increased with Wnt3a, whereas T-cell factor promoter activity decreased with niclosamide. Western blot analysis showed that Wnt3a upregulated β-catenin, dishevelled 2, and cyclin D1, while niclosamide downregulated them. Conclusion Niclosamide is a potential candidate for the treatment of hepatoma.
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Affiliation(s)
- Minoru Tomizawa
- Department of Gastroenterology, National Hospital Organization Shimoshizu Hospital, Yotsukaido City, Chiba, Japan
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Moore R, Cai KQ, Tao W, Smith ER, Xu XX. Differential requirement for Dab2 in the development of embryonic and extra-embryonic tissues. BMC DEVELOPMENTAL BIOLOGY 2013; 13:39. [PMID: 24168030 PMCID: PMC3924344 DOI: 10.1186/1471-213x-13-39] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 10/25/2013] [Indexed: 11/10/2022]
Abstract
BACKGROUND Disabled-2 (Dab2) is an endocytic adaptor protein involved in clathrin-mediated endocytosis and cargo trafficking. Since its expression is lost in several cancer types, Dab2 has been suggested to be a tumor suppressor. In vitro studies indicate that Dab2 establishes epithelial cell polarity and organization by directing endocytic trafficking of membrane glycoproteins. Dab2 also modulates cellular signaling pathways by mediating the endocytosis and recycling of surface receptors and associated signaling components. Previously, two independent gene knockout studies have been reported, with some discrepancies in the observed embryonic phenotypes. To further clarify the in vivo roles of Dab2 in development and physiology, we designed a new floxed allele to delete dab2 gene. RESULTS The constitutive dab2 deleted embryos showed a spectrum in the degree of endoderm disorganization in E5.5 and no mutant embryos persisted at E9.5. However, the mice were grossly normal when dab2 deletion was restricted to the embryo proper and the gene was retained in extraembryonic tissues using Meox2-Cre and Sox2-Cre. Adult Dab2-deficient mice had a small but statistically significant increase in serum cholesterol levels. CONCLUSION The study of the new dab2 mutant allele in embryos and embryoid bodies confirms a role for Dab2 in extraembryonic endoderm development and epithelial organization. Experimental results with embryoid bodies suggest that additional endocytic adaptors such as Arh and Numb could partially compensate for Dab2 loss. Conditional deletion indicates that Dab2 is dispensable for organ development, when the vast majority of the embryonic cells are dab2 null. However, Dab2 has a physiological role in the endocytosis of lipoproteins and cholesterol metabolism.
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Affiliation(s)
| | | | | | | | - Xiang-Xi Xu
- Department of Cell Biology, University of Miami Miller School of Medicine, Miami, 33136, FL, USA.
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Liu M, Zhang W, Luo W, Nie Q. Overexpression of TDRP1 gene in swine testis cell and its global transcriptome analysis. DNA Cell Biol 2013; 32:511-6. [PMID: 23837542 DOI: 10.1089/dna.2013.2084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The testis development-related protein-1 (TDRP1) gene was first isolated in spermatogenic cells of testis, and was related to the spermatogenesis and reproduction traits in mammals. This study was performed to further analyze the function of the pig TDRP1 gene by microarray screening of the TDRP1-overexpressed swine testis (ST) cell. After transfection of the recombinant pcDNA3.1-TDRP1 vector into the ST cell, the expression of the TDRP1 gene continued to increase at 12, 24, and 36 h post-transfection, and then decreased at 48 h, as indicated by both the fluorescence signal and quantitative PCR. Microarray screening revealed 529 upregulated and 1086 downregulated genes in TDRP1-overexpressed ST cells at 24 h post-transfection (TD-24) versus untransfected control (TD-blank), and 764 upregulated and 858 downregulated genes at 36 h post-transfection (TD-36) versus TD-blank, as well as 720 upregulated and 375 downregulated genes in TD-36 versus TD-24. As far as three contrasts were totally considered, 29 common genes were identified, including 17 upregulated genes and 12 downregulated ones. Further, Kyoto encyclopedia of genes and genomes prediction analysis indicated that some of these 29 differently expressed genes were involved in a number of biological pathways. Among the 17 upregulated genes, the PMAIP1 gene was significantly enriched in the p53 signaling pathway, and the others were the DDIT3 gene in the mitogen-activated protein kinases (MAPK) signaling pathway, the PPP1R3C gene in the insulin signaling pathway, as well as the GADD45A gene in the p53 signaling pathway, MAPK signaling pathway, and the cell cycle. Among the 12 downregulated genes, the SFRP4 gene was significantly enriched in the Wnt signaling pathway. This study indicated that the TDRP1 gene regulated PMAIP1, GADD45A, DDIT3, and PPP1R3C expression, and these genes involving p53, MAPK, insulin, and Wnt signaling pathways are related to spermatogenesis or reproduction in pig.
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Affiliation(s)
- Manqing Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou, China
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Engert S, Burtscher I, Liao WP, Dulev S, Schotta G, Lickert H. Wnt/β-catenin signalling regulates Sox17 expression and is essential for organizer and endoderm formation in the mouse. Development 2013; 140:3128-38. [PMID: 23824574 DOI: 10.1242/dev.088765] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Several signalling cascades are implicated in the formation and patterning of the three principal germ layers, but their precise temporal-spatial mode of action in progenitor populations remains undefined. We have used conditional gene deletion of mouse β-catenin in Sox17-positive embryonic and extra-embryonic endoderm as well as vascular endothelial progenitors to address the function of canonical Wnt signalling in cell lineage formation and patterning. Conditional mutants fail to form anterior brain structures and exhibit posterior body axis truncations, whereas initial blood vessel formation appears normal. Tetraploid rescue experiments reveal that lack of β-catenin in the anterior visceral endoderm results in defects in head organizer formation. Sox17 lineage tracing in the definitive endoderm (DE) shows a cell-autonomous requirement for β-catenin in midgut and hindgut formation. Surprisingly, wild-type posterior visceral endoderm (PVE) in midgut- and hindgut-deficient tetraploid chimera rescues the posterior body axis truncation, indicating that the PVE is important for tail organizer formation. Upon loss of β-catenin in the visceral endoderm and DE lineages, but not in the vascular endothelial lineage, Sox17 expression is not maintained, suggesting downstream regulation by canonical Wnt signalling. Strikingly, Tcf4/β-catenin transactivation complexes accumulated on Sox17 cis-regulatory elements specifically upon endoderm induction in an embryonic stem cell differentiation system. Together, these results indicate that the Wnt/β-catenin signalling pathway regulates Sox17 expression for visceral endoderm pattering and DE formation and provide the first functional evidence that the PVE is necessary for gastrula organizer gene induction and posterior axis development.
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Affiliation(s)
- Silvia Engert
- Institute of Stem Cell Research, Helmholtz Zentrum München, 85764 Neuherberg, Germany
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Gabriel D, Dvir T, Kohane DS. Delivering bioactive molecules as instructive cues to engineered tissues. Expert Opin Drug Deliv 2013; 9:473-92. [PMID: 22432691 DOI: 10.1517/17425247.2012.668521] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Growth factors and other bioactive molecules play a crucial role in the creation of functional engineered tissues from dissociated cells. AREAS COVERED This review discusses the delivery of bioactive molecules - particularly growth factors - to affect cellular function in the context of tissue engineering. We discuss the primary biological themes that are addressed by delivering bioactives, the types of molecules that are to be delivered, the major materials used in producing scaffolds and/or drug delivery systems, and the principal drug delivery strategies. EXPERT OPINION Drug delivery systems have allowed the sustained release of bioactive molecules to engineered tissues, with marked effects on tissue function. Sophisticated drug delivery techniques will allow precise recapitulation of developmental milestones by providing temporally distinct patterns of release of multiple bioactives. High-resolution patterning techniques will allow tissue constructs to be designed with precisely defined areas where bioactives can act. New biological discoveries, just as the development of small molecules with potent effects on cell differentiation, will likely have a marked impact on the field.
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Affiliation(s)
- Doris Gabriel
- Children's Hospital Boston, Harvard Medical School, Division of Critical Care Medicine, Department of Anesthesiology, Laboratory for Biomaterials and Drug Delivery, 300 Longwood Avenue, Boston, MA 02115, USA
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Dullard/Ctdnep1 modulates WNT signalling activity for the formation of primordial germ cells in the mouse embryo. PLoS One 2013; 8:e57428. [PMID: 23469192 PMCID: PMC3587611 DOI: 10.1371/journal.pone.0057428] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 01/21/2013] [Indexed: 11/19/2022] Open
Abstract
Dullard/Ctdnep1 is a member of the serine/threonine phosphatase family of the C-terminal domain of eukaryotic RNA polymerase II. Embryos lacking Dullard activity fail to form primordial germ cells (PGCs). In the mouse, the formation of PGCs is influenced by BMP4 and WNT3 activity. Although Dullard is reputed to negatively regulate BMP receptor function, in this study we found mutations in Dullard had no detectable effect on BMP4 and p-Smad activity. Furthermore Dullard mutations did not influence the dosage-dependent inductive effect of Bmp4 in PGC formation. However, Dullard may function as a positive regulator of WNT signalling. Combined loss of one copy each of Dullard and Wnt3 had a synergistic effect on the reduction of PGC numbers in the compound heterozygous embryo. In addition, loss of Dullard function was accompanied by down-regulation of WNT/β-catenin signalling activity and a reduction in the level of Dishevelled 2 (Dvl2). Therefore, Dullard may play a role in the fine-tuning of WNT signalling activity by modulating the expression of ligands/antagonists and the availability of Dvl2 protein during specification of the germ cell lineage.
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James RG, Davidson KC, Bosch KA, Biechele TL, Robin NC, Taylor RJ, Major MB, Camp ND, Fowler K, Martins TJ, Moon RT. WIKI4, a novel inhibitor of tankyrase and Wnt/ß-catenin signaling. PLoS One 2012; 7:e50457. [PMID: 23227175 PMCID: PMC3515623 DOI: 10.1371/journal.pone.0050457] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 10/22/2012] [Indexed: 12/21/2022] Open
Abstract
The Wnt/ß-catenin signaling pathway controls important cellular events during development and often contributes to disease when dysregulated. Using high throughput screening we have identified a new small molecule inhibitor of Wnt/ß-catenin signaling, WIKI4. WIKI4 inhibits expression of ß-catenin target genes and cellular responses to Wnt/ß-catenin signaling in cancer cell lines as well as in human embryonic stem cells. Furthermore, we demonstrate that WIKI4 mediates its effects on Wnt/ß-catenin signaling by inhibiting the enzymatic activity of TNKS2, a regulator of AXIN ubiquitylation and degradation. While TNKS has previously been shown to be the target of small molecule inhibitors of Wnt/ß-catenin signaling, WIKI4 is structurally distinct from previously identified TNKS inhibitors.
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Affiliation(s)
- Richard G. James
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Kathryn C. Davidson
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Katherine A. Bosch
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Travis L. Biechele
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Nicholas C. Robin
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Russell J. Taylor
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Michael B. Major
- Department of Cell and Developmental Biology, University of North Carolina at Chapel Hill, North Carolina, United States of America
| | - Nathan D. Camp
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Kerry Fowler
- KWF Consulting, Seattle, Washington, United States of America
| | - Timothy J. Martins
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- Quellos High Throughput Screening Core, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
| | - Randall T. Moon
- Department of Pharmacology, Seattle, Washington, United States of America
- Institute for Stem Cell and Regenerative Medicine, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, Seattle, Washington, United States of America
- University of Washington School of Medicine, Seattle, Washington, United States of America
- * E-mail:
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Lim KT, Gupta MK, Lee SH, Jung YH, Han DW, Lee HT. Possible involvement of Wnt/β-catenin signaling pathway in hatching and trophectoderm differentiation of pig blastocysts. Theriogenology 2012; 79:284-90.e1-2. [PMID: 23174779 DOI: 10.1016/j.theriogenology.2012.08.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 08/21/2012] [Accepted: 08/27/2012] [Indexed: 12/22/2022]
Abstract
The Wnt/β-catenin signaling pathway plays essential roles in the regulation of cell fate and polarity during embryonic development of many animal species. This study investigated the possible involvement of Wnt/β-catenin signaling pathway during hatching and trophectoderm (TE) development in pig blastocysts. Results showed that β-catenin and DVL3, the key mediators of Wnt/β-catenin signaling, disappeared from the nucleus after blastocyst hatching. Specific inhibition of Wnt/β-catenin signaling pathway, by Dickkopf-1, increased the rate of blastocyst hatching, total nuclear number per blastocyst, and reduced the ratio of inner cell mass (ICM):TE (P < 0.05). In contrast, specific activation of the Wnt/β-catenin signaling pathway, by lithium chloride, reduced the rate of blastocyst hatching, total nuclear number per blastocyst, and increased the ratio of ICM:TE (P < 0.05). The change in the ICM:TE ratio was associated with the change in the number of TE cells but not the ICM cells. Activation or inhibition of Wnt/β-catenin signaling and β-catenin nuclear accumulation, by lithium chloride or Dickkopf-1, also altered the expression of CDX2. These data therefore, suggest the possible involvement of Wnt/β-catenin signaling in regulating hatching and TE fate during the development of pig blastocyst.
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Affiliation(s)
- Kyung Tae Lim
- Department of Animal Biotechnology, Animal Resources Research Center/Bio-Organ Research Center, Konkuk University, Seoul, Korea
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Bartlett JD, Smith CE. Modulation of cell-cell junctional complexes by matrix metalloproteinases. J Dent Res 2012; 92:10-7. [PMID: 23053846 DOI: 10.1177/0022034512463397] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The ameloblast cell layer of the enamel organ is in contact with the forming enamel as it develops into the hardest substance in the body. Ameloblasts move in groups that slide by one another as the enamel layer thickens. Each ameloblast is responsible for the formation of one enamel rod, and the rods are the mineralized trail that moving ameloblasts leave behind. Matrix metalloproteinases (MMPs) facilitate cell movement in various tissues during development, and in this review we suggest that the tooth-specific MMP, enamelysin (MMP20), facilitates ameloblast movements during enamel development. Mmp20 null mice have thin brittle enamel with disrupted rod patterns that easily abrades from the underlying dentin. Strikingly, the Mmp20 null mouse enamel organ morphology is noticeably dysplastic during late-stage development, when MMP20 is no longer expressed. We suggest that in addition to its role of cleaving enamel matrix proteins, MMP20 also cleaves junctional complexes present on ameloblasts to foster the cell movement necessary for formation of the decussating enamel rod pattern. Therefore, inactivation of MMP20 would result in tight ameloblast cell-cell attachments that may cause maturation-stage enamel organ dysplasia. The tight ameloblast attachments would also preclude the ameloblast movement necessary to form decussating enamel rod patterns.
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Affiliation(s)
- J D Bartlett
- Department of Mineralized Tissue Biology, Forsyth Institute, Harvard School of Dental Medicine, Cambridge, MA, USA.
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Peng X, Liu T, Wang Y, Yan Q, Jin H, Li L, Qian Q, Wu M. Wnt/beta-catenin signaling in embryonic stem cell converted tumor cells. J Transl Med 2012; 10:196. [PMID: 22995718 PMCID: PMC3515512 DOI: 10.1186/1479-5876-10-196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 09/12/2012] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Embryonic stem cells (ESCs) are pluripotent stem cells and can form tumors containing cells from all three germ layers. Similarities between pluripotent stem cells and malignant tumor cells have been identified. The purpose of this study was to obtain ESCs-converted tumor cell lines and to investigate the mechanism of malignancy in pluripotent stem cells. METHODS Mouse ESCs were subcutaneously injected into nude mice to obtain tumors from which a tumor-like cell line (ECCs1) was established by culturing the cells in chemical-defined N2B27 medium supplied with two small molecular inhibitors CHIR99021 and PD0325901 (2i). The ECCs1 were then subcutaneously injected into nude mice again to obtain tumors from which another tumor-like cells line (ECCs2) was established in the same 2i medium. The malignant degree of ESCs, ECCs1 and ECCs2 was compared and the underlying mechanism involved in the malignancy development of ESCs was examined. RESULTS The three ESCs, ECCs1 and ECCs2 cell lines were cultured in the same 2i condition and showed some likeness such as Oct4-expression and long-term expansion ability. However, the morphology and the tumor-formation ability of the cell lines were different. We identified that ECCs1 and ECCs2 gradually acquired malignancy. Moreover, Wnt signaling-related genes such as CD133 and β-catenin expression were up-regulated and Frizzled related protein (FRP) was down-regulated during the tumor development of ESCs. CONCLUSIONS The two tumor-like cell lines ECCs1 and ECCs2 stand for early malignant development stage of ESCs and the ECCs2 was more malignant than the ECCs1. Moreover, we identified that Wnt/β-catenin signaling played an important role in the malignancy process of ESCs.
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Affiliation(s)
- Xinrong Peng
- Laboratory of Viral and Gene Therapy, Eastern Hepatobiliary Surgical Hospital, The Second Military Medical University, Shanghai, China
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Watson LN, Mottershead DG, Dunning KR, Robker RL, Gilchrist RB, Russell DL. Heparan sulfate proteoglycans regulate responses to oocyte paracrine signals in ovarian follicle morphogenesis. Endocrinology 2012; 153:4544-55. [PMID: 22759380 DOI: 10.1210/en.2012-1181] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In the ovarian follicle, oocyte-secreted factors induce cumulus-specific genes and repress mural granulosa cell specific genes to establish these functionally distinct cell lineages. The mechanism establishing this precise morphogenic pattern of oocyte signaling within the follicle is unknown. The present study investigated a role for heparan sulphate proteoglycans (HSPG) as coreceptors mediating oocyte secreted factor signaling. In vitro maturation of cumulus oocyte complexes in the presence of exogenous heparin, which antagonizes HSPG signaling, prevented cumulus expansion and blocked the induction of cumulus-specific matrix genes, Has2 and Tnfaip6, whereas conversely, the mural granulosa-specific genes, Lhcgr and Cyp11a1, were strongly up-regulated. Heparin also blocked phosphorylation of SMAD2. Exogenous growth differentiation factor (GDF)-9 reversed these heparin effects; furthermore, GDF9 strongly bound to heparin sepharose. These observations indicate that heparin binds endogenous GDF9 and disrupts interaction with heparan sulphate proteoglycan coreceptor(s), important for GDF9 signaling. The expression of candidate HSPG coreceptors, Syndecan 1-4, Glypican 1-6, and Betaglycan, was examined. An ovulatory dose of human chorionic gonadotropin down-regulated Betaglycan in cumulus cells, and this regulation required GDF9 activity; conversely, Betaglycan was significantly increased in luteinizing mural granulosa cells. Human chorionic gonadotropin caused very strong induction of Syndecan 1 and Syndecan 4 in mural granulosa as well as cumulus cells. Glypican 1 was selectively induced in cumulus cells, and this expression appeared dependent on GDF9 action. These data suggest that HSPG play an essential role in GDF9 signaling and are involved in the patterning of oocyte signaling and cumulus cell function in the periovulatory follicle.
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Affiliation(s)
- Laura N Watson
- Robinson Institute, School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide 5005, Australia
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Establishment of mouse teratocarcinomas stem cells line and screening genes responsible for malignancy. PLoS One 2012; 7:e43955. [PMID: 22952821 PMCID: PMC3432059 DOI: 10.1371/journal.pone.0043955] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 07/27/2012] [Indexed: 02/06/2023] Open
Abstract
The sequential transplantation of embryonal carcinoma cells in vivo can accelerate the growth and malignancy of teratocarcinomas. However, the possible molecular mechanisms in this process that reflect cancer formation in the early stage are largely unknown and. To identify which genes are associated with the changes of malignancy of teratocarcinomas, we established a tumorigenesis model in which teratocarcinoma were induced via injecting embryonic stem cells into immuno-deficiency mice, isolating teratocarcinoma stem cell from a teratocarcinoma in serum-free culture medium and injecting teratocarcinoma stem cells into immune-deficient mice continuously. By using high-throughput deep sequence technology, we identified 26 differentially expressed genes related to the changes of characteristics of teratocarcinoma stem cell in which 18 out of 26 genes were down-regulated and 8 genes were up-regulated. Among these genes, several tumor-related genes such as Gata3, Arnt and Tdgf1, epigenetic associated genes such as PHC1 and Uty were identified. Pathway enrichment analysis result revealed that Wnt signaling pathway, primary immunodeficiency pathway, antigen processing and presentation pathway and allograft rejection pathway were involved in the teratocarcinoma tumorigenesis (corrected p value<0.05). In summary, our study established a tumorigenesis model and proposed some candidate genes and signaling pathways that may play a key role in the early stage of cancer occurrence.
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Tsoi S, Zhou C, Grant JR, Pasternak JA, Dobrinsky J, Rigault P, Nieminen J, Sirard MA, Robert C, Foxcroft GR, Dyck MK. Development of a porcine (Sus scofa) embryo-specific microarray: array annotation and validation. BMC Genomics 2012; 13:370. [PMID: 22863022 PMCID: PMC3468353 DOI: 10.1186/1471-2164-13-370] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Accepted: 07/18/2012] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND The domestic pig is an important livestock species and there is strong interest in the factors that affect the development of viable embryos and offspring in this species. A limited understanding of the molecular mechanisms involved in early embryonic development has inhibited our ability to fully elucidate these factors. Next generation deep sequencing and microarray technologies are powerful tools for delineation of molecular pathways involved in the developing embryo. RESULTS Here we present the development of a porcine-embryo-specific microarray platform created from a large expressed sequence tag (EST) analysis generated by Roche/454 next-generation sequencing of cDNAs constructed from critical stages of in vivo or in vitro porcine preimplantation embryos. Two cDNA libraries constructed from in vitro and in vivo produced preimplantation porcine embryos were normalized and sequenced using 454 Titanium pyrosequencing technology. Over one million high-quality EST sequences were obtained and used to develop the EMbryogene Porcine Version 1 (EMPV1) microarray composed of 43,795 probes. Based on an initial probe sequence annotation, the EMPV1 features 17,409 protein-coding, 473 pseudogenes, 46 retrotransposed, 2,359 non-coding RNA, 4,121 splice variants in 2,862 genes and a total of 12,324 Novel Transcript Regions (NTR). After re-annotation, the total unique genes increased from 11,961 to 16,281 and 1.9% of them belonged to a large olfactory receptor (OR) gene family. Quality control on the EMPV1 was performed and revealed an even distribution of ten clusters of spiked-in control spots and array to array (dye-swap) correlation was 0.97. CONCLUSIONS Using next-generation deep sequencing we have produced a large EST dataset to allow for the selection of probe sequences for the development of the EMPV1 microarray platform. The quality of this embryo-specific array was confirmed with a high-level of reproducibility using current Agilent microarray technology. With more than an estimated 20,000 unique genes represented on the EMPV1, this platform will provide the foundation for future research into the in vivo and in vitro factors that affect the viability of porcine embryos, as well as the effects of these factors on the live offspring that result from these embryos.
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Affiliation(s)
- Stephen Tsoi
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada.
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