1
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Mote RD, Tiwari M, Yadavalli N, Rajan R, Subramanyam D. A high-throughput screen in mESCs to identify the cross-talk between signaling, endocytosis, and pluripotency. Cell Biol Int 2024. [PMID: 38706123 DOI: 10.1002/cbin.12168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 03/23/2024] [Accepted: 04/14/2024] [Indexed: 05/07/2024]
Abstract
Embryonic stem cell fate is regulated by various cellular processes. Recently, the process of endocytosis has been implicated in playing a role in the maintenance of self-renewal and pluripotency of mouse embryonic stem cells. A previous siRNA-based screen interrogated the function of core components of the endocytic machinery in maintaining the pluripotency of embryonic stem cells, revealing a crucial role for clathrin mediated endocytosis. A number of other proteins involved in key signaling pathways have also been shown to both regulate and be regulated by endocytosis. We collated a list of 1141 genes in connection to the term "endocytosis" from Kyoto Encyclopedia of Genes and Genomes (KEGG) and Gene Ontology (GO), excluding those previously interrogated, and examined the effect of their knockdown on the pluripotency of mouse embryonic stem cells (mESCs) using levels of green fluorescent protein driven by the Oct4 promoter. We used high-throughput screening followed by an automated MATrix LABoratory (MATLAB)-based analysis pipeline and assessed changes in GFP fluorescence as a readout for ESC pluripotency. Through this screen we identified a number of genes, many hitherto not associated with stem cell pluripotency, which upon knockdown either resulted in a significant increase or decrease of GFP fluorescence. We further present validation for some of these hits. We present a workflow aimed to identify genes involved in signaling pathways which can be regulated by endocytosis, and that affect the pluripotency of ESCs.
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Affiliation(s)
- Ridim D Mote
- Stem Cell Biology Lab, National Centre for Cell Science, SP Pune University Campus, Pune, India
| | - Mahak Tiwari
- Stem Cell Biology Lab, National Centre for Cell Science, SP Pune University Campus, Pune, India
- SP Pune University, Pune, India
| | - Narayana Yadavalli
- Stem Cell Biology Lab, National Centre for Cell Science, SP Pune University Campus, Pune, India
| | - Raghav Rajan
- Indian Institute of Science Education and Research, Pune, India
| | - Deepa Subramanyam
- Stem Cell Biology Lab, National Centre for Cell Science, SP Pune University Campus, Pune, India
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2
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Ghasemi N, Azizi H, Skutella T. Unraveling the Significance of Nanog in the Generation of Embryonic Stem-like Cells from Spermatogonia Stem Cells: A Combined In Silico Analysis and In Vitro Experimental Approach. Int J Mol Sci 2024; 25:4833. [PMID: 38732061 PMCID: PMC11084519 DOI: 10.3390/ijms25094833] [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: 02/22/2024] [Revised: 03/13/2024] [Accepted: 03/18/2024] [Indexed: 05/13/2024] Open
Abstract
Embryonic stem-like cells (ES-like cells) are promising for medical research and clinical applications. Traditional methods involve "Yamanaka" transcription (OSKM) to derive these cells from somatic cells in vitro. Recently, a novel approach has emerged, obtaining ES-like cells from spermatogonia stem cells (SSCs) in a time-related process without adding artificial additives to cell cultures, like transcription factors or small molecules such as pten or p53 inhibitors. This study aims to investigate the role of the Nanog in the conversion of SSCs to pluripotent stem cells through both in silico analysis and in vitro experiments. We used bioinformatic methods and microarray data to find significant genes connected to this derivation path, to construct PPI networks, using enrichment analysis, and to construct miRNA-lncRNA networks, as well as in vitro experiments, immunostaining, and Fluidigm qPCR analysis to connect the dots of Nanog significance. We concluded that Nanog is one of the most crucial differentially expressed genes during SSC conversion, collaborating with critical regulators such as Sox2, Dazl, Pou5f1, Dnmt3, and Cdh1. This intricate protein network positions Nanog as a pivotal factor in pathway enrichment for generating ES-like cells, including Wnt signaling, focal adhesion, and PI3K-Akt-mTOR signaling. Nanog expression is presumed to play a vital role in deriving ES-like cells from SSCs in vitro. Finding its pivotal role in this path illuminates future research and clinical applications.
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Affiliation(s)
- Nima Ghasemi
- Faculty of Biotechnology, Amol University of Special Modern Technologies, Amol 49767, Iran;
| | - Hossein Azizi
- Faculty of Biotechnology, Amol University of Special Modern Technologies, Amol 49767, Iran;
| | - Thomas Skutella
- Institute for Anatomy and Cell Biology, Medical Faculty, University of Heidelberg, Im Neuenheimer Feld 307, 69120 Heidelberg, Germany;
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3
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Rodriguez-Polanco WR, Norris A, Velasco AB, Gleason AM, Grant BD. Syndapin and GTPase RAP-1 control endocytic recycling via RHO-1 and non-muscle myosin II. Curr Biol 2023; 33:4844-4856.e5. [PMID: 37832552 PMCID: PMC10841897 DOI: 10.1016/j.cub.2023.09.051] [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: 04/14/2023] [Revised: 08/07/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023]
Abstract
After endocytosis, many plasma membrane components are recycled via membrane tubules that emerge from early endosomes to form recycling endosomes, eventually leading to their return to the plasma membrane. We previously showed that Syndapin/PACSIN-family protein SDPN-1 is required in vivo for basolateral endocytic recycling in the C. elegans intestine. Here, we document an interaction between the SDPN-1 SH3 domain and a target sequence in PXF-1/PDZ-GEF1/RAPGEF2, a known exchange factor for Rap-GTPases. We found that endogenous mutations engineered into the SDPN-1 SH3 domain, or its binding site in the PXF-1 protein, interfere with recycling in vivo, as does the loss of the PXF-1 target RAP-1. In some contexts, Rap-GTPases negatively regulate RhoA activity, suggesting a potential for Syndapin to regulate RhoA. Our results indicate that in the C. elegans intestine, RHO-1/RhoA is enriched on SDPN-1- and RAP-1-positive endosomes, and the loss of SDPN-1 or RAP-1 elevates RHO-1(GTP) levels on intestinal endosomes. Furthermore, we found that depletion of RHO-1 suppressed sdpn-1 mutant recycling defects, indicating that control of RHO-1 activity is a key mechanism by which SDPN-1 acts to promote endocytic recycling. RHO-1/RhoA is well known for controlling actomyosin contraction cycles, although little is known about the effects of non-muscle myosin II on endosomes. Our analysis found that non-muscle myosin II is enriched on SDPN-1-positive endosomes, with two non-muscle myosin II heavy-chain isoforms acting in apparent opposition. Depletion of nmy-2 inhibited recycling like sdpn-1 mutants, whereas depletion of nmy-1 suppressed sdpn-1 mutant recycling defects, indicating that actomyosin contractility controls recycling endosome function.
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Affiliation(s)
| | - Anne Norris
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA
| | - Agustin B Velasco
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA
| | - Adenrele M Gleason
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA; Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Barth D Grant
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854, USA; Rutgers Center for Lipid Research, Rutgers, the State University of New Jersey, New Brunswick, NJ 08901-8521, USA.
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4
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Rodriguez-Polanco WR, Norris A, Velasco AB, Gleason AM, Grant BD. Syndapin Regulates the RAP-1 GTPase to Control Endocytic Recycling via RHO-1 and Non-Muscle Myosin II. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.27.530328. [PMID: 36909525 PMCID: PMC10002613 DOI: 10.1101/2023.02.27.530328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
After endocytosis, many plasma membrane components are recycled via narrow-diameter membrane tubules that emerge from early endosomes to form recycling endosomes, eventually leading to their return to the plasma membrane. We previously showed that the F-BAR and SH3 domain Syndapin/PACSIN-family protein SDPN-1 is required in vivo for basolateral endocytic recycling in the C. elegans intestine. Here we sought to determine the significance of a predicted interaction between the SDPN-1 SH3 domain and a target sequence in PXF-1/PDZ-GEF1/RAPGEF2, a known exchange factor for Rap-GTPases. We found that endogenous mutations we engineered into the SDPN-1 SH3 domain, or its binding site in the PXF-1 protein, interfere with recycling in vivo , as does loss of the PXF-1 target RAP-1. Rap-GTPases have been shown in several contexts to negatively regulate RhoA activity. Our results show that RHO-1/RhoA is enriched on SDPN-1 and RAP-1 positive endosomes in the C. elegans intestine, and loss of SDPN-1 or RAP-1 elevates RHO-1(GTP) levels on intestinal endosomes. Furthermore, we found that depletion of RHO-1 suppressed sdpn-1 mutant recycling defects, indicating that control of RHO-1 activity is a key mechanism by which SDPN-1 acts to promote endocytic recycling. RHO-1/RhoA is well-known for controlling actomyosin contraction cycles, although little is known of non-muscle myosin II on endosomes. Our analysis found that non-muscle myosin II is enriched on SDPN-1 positive endosomes, with two non-muscle myosin II heavy chain isoforms acting in apparent opposition. Depletion of nmy-2 inhibited recycling like sdpn-1 mutants, while depletion of nmy-1 suppressed sdpn-1 mutant recycling defects, indicating actomyosin contractility in controlling recycling endosome function.
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5
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Li JH, Trivedi V, Diz-Muñoz A. Understanding the interplay of membrane trafficking, cell surface mechanics, and stem cell differentiation. Semin Cell Dev Biol 2023; 133:123-134. [PMID: 35641408 PMCID: PMC9703995 DOI: 10.1016/j.semcdb.2022.05.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 04/08/2022] [Accepted: 05/14/2022] [Indexed: 01/17/2023]
Abstract
Stem cells can generate a diversity of cell types during development, regeneration and adult tissue homeostasis. Differentiation changes not only the cell fate in terms of gene expression but also the physical properties and functions of cells, e.g. the secretory activity, cell shape, or mechanics. Conversely, these activities and properties can also regulate differentiation itself. Membrane trafficking is known to modulate signal transduction and thus has the potential to control stem cell differentiation. On the other hand, membrane trafficking, particularly from and to the plasma membrane, depends on the mechanical properties of the cell surface such as tension within the plasma membrane or the cortex. Indeed, recent findings demonstrate that cell surface mechanics can also control cell fate. Here, we review the bidirectional relationships between these three fundamental cellular functions, i.e. membrane trafficking, cell surface mechanics, and stem cell differentiation. Furthermore, we discuss commonly used methods in each field and how combining them with new tools will enhance our understanding of their interplay. Understanding how membrane trafficking and cell surface mechanics can guide stem cell fate holds great potential as these concepts could be exploited for directed differentiation of stem cells for the fields of tissue engineering and regenerative medicine.
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Affiliation(s)
- Jia Hui Li
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory (EMBL), Meyerhofstraße 1, Heidelberg 69117, Germany
| | - Vikas Trivedi
- EMBL, PRBB, Dr. Aiguader, 88, Barcelona 08003, Spain,Developmental Biology Unit, EMBL, Meyerhofstraße 1, Heidelberg 69117, Germany
| | - Alba Diz-Muñoz
- Cell Biology and Biophysics Unit, European Molecular Biology Laboratory (EMBL), Meyerhofstraße 1, Heidelberg 69117, Germany.
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Nakashima Y, Tsukahara M. Laminin-511 activates the human induced pluripotent stem cell survival via α6β1 integrin-Fyn-RhoA-ROCK signaling. Stem Cells Dev 2022; 31:706-719. [PMID: 35726387 DOI: 10.1089/scd.2022.0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
In human induced pluripotent stem cells (hiPSCs), laminin-511/α6β1 integrin interacts with E-cadherin, an intercellular adhesion molecule, to induce the activation of the PI3K-dependent signaling pathway. The interaction between laminin-511/α6β1 integrin and E-cadherin, an intercellular adhesion molecule, results in protection against apoptosis via the proto-oncogene tyrosine-protein kinase Fyn(Fyn)-RhoA-ROCK signaling pathway and the Ras homolog gene family member A (RhoA)/Rho kinase (ROCK) signaling pathway (the major pathway for cell death). In this paper, the impact of laminin-511 on hiPSC on α6β1 integrin-Fyn-RhoA-ROCK signaling is discussed and explored along with validation experiments. PIK3CA mRNA (mean [standard deviation {SD}]: iMatrix-511, 1.00 [0. 61]; collagen+MFGE8, 0.023 [0.02]; **P<0.01; n=6) and PIK3R1 mRNA (mean [SD]: iMatrix-511, 1.00 [0. 79]; collagen+MFGE8, 0.040 [0.06]; *P<0.05; n=6) were upregulated by iMatrix-511 resulting from an increased expression of Integrin α6 mRNA (mean [SD]: iMatrix-511, 1.00 [0. 42]; collagen+MFGE8, 0.23 [0.05]; **P<0.01; n=6). iMatrix-511 increased the expression of p120-Catenin mRNA (mean [SD]: iMatrix-511, 1.00 [0. 71]; collagen+MFGE8, 0.025 [0.03]; **P<0.01; n=6) and RAC1 mRNA (mean [SD]: iMatrix-511, 1.00 [0. 28]; collagen+MFGE8, 0.39 [0.15]; **P<0.01; n=6) by increasing the expression of E-cadherin mRNA (mean [SD]: iMatrix-511, 1.00 [0. 38]; collagen+MFGE8, 0.16 [0.11]; **P<0.01; n=6). As a result, iMatrix-511 increased the expression of P190 RhoGAP (GTPase-activating proteins) mRNA, such as ARHGAP1 mRNA (mean [SD]: iMatrix-511, 1.00 [0. 57]; collagen+MFGE8, 0.032 [0.03]; **P<0.01; n=6), ARHGAP4 mRNA (mean [SD]: iMatrix-511, 1.00 [0. 56]; collagen+MFGE8, 0.039 [0.049]; **P<0.01; n=6), and ARHGAP5 mRNA (mean [SD]: iMatrix-511, 1.00 [0. 39]; collagen+MFGE8, 0.063 [0.043]; **P<0.01; n=6). Western blotting showed that phospho-Rac1 remained in the cytoplasm and phospho-Fyn showed nuclear transition in iPSCs cultured on iMatrix-511. Proteome analysis showed that PI3K signaling was enhanced and cytoskeletal actin was activated in iPSCs cultured on iMatrix-511. In conclusion, laminin-511 strongly activated the cell survival by promoting α6β1 integrin-Fyn-RhoA-ROCK signaling in hiPSCs.
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Affiliation(s)
- Yoshiki Nakashima
- Kyoto University Center for iPS Cell Research and Application Foundation (CiRA Foundation), Facility for iPS Cell Therapy (FiT), Kyoto Research Park KISTIC Building Room 501, 5th floor, KISTIC building,, Kyoto Research Park KISTIC Building Room 501, 5th floor, KISTIC building, 134 Chudoji Minami-cho,, Shimogyo-ku,, Kyoto, Kyoto, Japan, 600-8813;
| | - Masayoshi Tsukahara
- Kyoto University Center for iPS Cell Research and Application Foundation (CiRA Foundation), Facility for iPS Cell Therapy (FiT), kyoto, Kyoto, Japan;
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7
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Bhattacharyya S, Mote RD, Freimer JW, Tiwari M, Singh SB, Arumugam S, Narayana YV, Rajan R, Subramanyam D. Cell-cell adhesions in embryonic stem cells regulate the stability and transcriptional activity of β-catenin. FEBS Lett 2022; 596:1647-1660. [PMID: 35344589 PMCID: PMC10156795 DOI: 10.1002/1873-3468.14341] [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: 01/03/2022] [Revised: 03/13/2022] [Accepted: 03/16/2022] [Indexed: 11/07/2022]
Abstract
E-cadherin (CDH1) is involved in maintaining cell-cell adhesions in embryonic stem cells (ESCs). However, its function in the context of cell fate decisions is largely unknown. Using mouse ESCs (mESCs), we demonstrate that E-cadherin and β-catenin interact at the membrane and continue to do so upon internalization within the cell. Cdh1-/- mESCs failed to form tight colonies, with altered differentiation marker expression, and retention of pluripotency factors during differentiation. Interestingly, Cdh1-/- mESCs showed dramatically reduced β-catenin levels. Transcriptional profiling of Cdh1-/- mESCs displayed a significant alteration in the expression of a subset of β-catenin targets in a cell state- and GSK3β-dependent manner. Our findings hint at hitherto unknown roles played by E-cadherin in regulating the activity of β-catenin in ESCs.
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Affiliation(s)
- Sinjini Bhattacharyya
- National Centre for Cell Science, Ganeshkhind Road.,SP Pune University, Ganeshkhind Road
| | - Ridim D Mote
- National Centre for Cell Science, Ganeshkhind Road
| | - Jacob W Freimer
- Department of Genetics, Stanford University, Stanford, CA, 94305, USA.,UCSF Institute of Genomic Immunology, San Francisco, CA, 94158, USA.,Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, 94143, USA
| | - Mahak Tiwari
- National Centre for Cell Science, Ganeshkhind Road.,SP Pune University, Ganeshkhind Road
| | - Surya Bansi Singh
- National Centre for Cell Science, Ganeshkhind Road.,SP Pune University, Ganeshkhind Road
| | | | - Yadavalli V Narayana
- National Centre for Cell Science, Ganeshkhind Road.,SP Pune University, Ganeshkhind Road
| | - Raghav Rajan
- Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, 411008
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8
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Zhou P, Qin L, Ge Z, Xie B, Huang H, He F, Ma S, Ren L, Shi J, Pei S, Dong G, Qi Y, Lan F. Design of chemically defined synthetic substrate surfaces for the in vitro maintenance of human pluripotent stem cells: A review. J Biomed Mater Res B Appl Biomater 2022; 110:1968-1990. [PMID: 35226397 DOI: 10.1002/jbm.b.35034] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/10/2022] [Accepted: 01/17/2022] [Indexed: 11/11/2022]
Abstract
Human pluripotent stem cells (hPSCs) have the potential of long-term self-renewal and differentiation into nearly all cell types in vitro. Prior to the downstream applications, the design of chemically defined synthetic substrates for the large-scale proliferation of quality-controlled hPSCs is critical. Although great achievements have been made, Matrigel and recombinant proteins are still widely used in the fundamental research and clinical applications. Therefore, much effort is still needed to improve the performance of synthetic substrates in the culture of hPSCs, realizing their commercial applications. In this review, we summarized the design of reported synthetic substrates and especially their limitations in terms of cell culture. Moreover, much attention was paid to the development of promising peptide displaying surfaces. Besides, the biophysical regulation of synthetic substrate surfaces as well as the three-dimensional culture systems were described.
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Affiliation(s)
- Ping Zhou
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Liying Qin
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Zhangjie Ge
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Biyao Xie
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Hongxin Huang
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Fei He
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Shengqin Ma
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Lina Ren
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Jiamin Shi
- Department of Laboratory Animal Centre, Changzhi Medical College, Changzhi, China
| | - Suying Pei
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Genxi Dong
- School of Stomatology, Lanzhou University, Lanzhou, China
| | - Yongmei Qi
- School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Feng Lan
- Fuwai Hospital Chinese Academy of Medical Sciences, Shenzhen Key Laboratory of Cardiovascular Disease, State Key Laboratory of Cardiovascular Disease, Shenzhen, China
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Kim EM, Lee GM, Lee S, Kim SJ, Lee D, Yoon DS, Joo J, Kong H, Park HH, Shin H. Effects of mechanical properties of gelatin methacryloyl hydrogels on encapsulated stem cell spheroids for 3D tissue engineering. Int J Biol Macromol 2022; 194:903-913. [PMID: 34838857 DOI: 10.1016/j.ijbiomac.2021.11.145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 01/22/2023]
Abstract
Cell spheroids are three-dimensional cell aggregates that have been widely employed in tissue engineering. Spheroid encapsulation has been explored as a method to enhance cell-cell interactions. However, the effect of hydrogel mechanical properties on spheroids, specifically soft hydrogels (<1 kPa), has not yet been studied. In this study, we determined the effect of encapsulation of stem cell spheroids by hydrogels crosslinked with different concentrations of gelatin methacryloyl (GelMA) on the functions of the stem cells. To this end, human adipose-derived stem cell (ADSC) spheroids with a defined size were prepared, and spheroid-laden hydrogels with various concentrations (5, 10, 15%) were fabricated. The apoptotic index of cells from spheroids encapsulated in the 15% hydrogel was high. The migration distance was five-fold higher in cells encapsulated in the 5% hydrogel than the 10% hydrogel. After 14 days of culture, cells from spheroids in the 5% hydrogel were observed to have spread and proliferated. Osteogenic factor and pro-angiogenic factor production in the 15% hydrogel was high. Collectively, our results indicate that the functionality of spheroids can be regulated by the mechanical properties of hydrogel, even under 1 kPa. These results indicate that spheroid-laden hydrogels are suitable for use in 3D tissue construction.
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Affiliation(s)
- Eun Mi Kim
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Gyeong Min Lee
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea; BK21 FOUR Education and Research Group for Biopharmaceutical Innovation Leader, Department of Bioengineering, College of Engineering, Hanyang University, Republic of Korea
| | - Sangmin Lee
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea; BK21 FOUR Education and Research Group for Biopharmaceutical Innovation Leader, Department of Bioengineering, College of Engineering, Hanyang University, Republic of Korea
| | - Se-Jeong Kim
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea; BK21 FOUR Education and Research Group for Biopharmaceutical Innovation Leader, Department of Bioengineering, College of Engineering, Hanyang University, Republic of Korea
| | - Dongtak Lee
- School of Biomedical Engineering, Korea University, Seoul 20841, Republic of Korea
| | - Dae Sung Yoon
- School of Biomedical Engineering, Korea University, Seoul 20841, Republic of Korea
| | - Jinmyoung Joo
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Hyunjoon Kong
- Department of Chemical and Biomolecular engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States
| | - Hee Ho Park
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
| | - Heungsoo Shin
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea; BK21 FOUR Education and Research Group for Biopharmaceutical Innovation Leader, Department of Bioengineering, College of Engineering, Hanyang University, Republic of Korea; Institute of Nano Science and Technology, Hanyang University, 222 Wangsimri-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
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10
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Pišlar A, Kos J. γ-Enolase enhances Trk endosomal trafficking and promotes neurite outgrowth in differentiated SH-SY5Y cells. Cell Commun Signal 2021; 19:118. [PMID: 34895236 PMCID: PMC8665614 DOI: 10.1186/s12964-021-00784-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 09/03/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Neurotrophins can activate multiple signalling pathways in neuronal cells through binding to their cognate receptors, leading to neurotrophic processes such as cell survival and differentiation. γ-Enolase has been shown to have a neurotrophic activity that depends on its translocation towards the plasma membrane by the scaffold protein γ1-syntrophin. The association of γ-enolase with its membrane receptor or other binding partners at the plasma membrane remains unknown. METHODS In the present study, we used immunoprecipitation and immunofluorescence to show that γ-enolase associates with the intracellular domain of the tropomyosin receptor kinase (Trk) family of tyrosine kinase receptors at the plasma membrane of differentiated SH-SY5Y cells. RESULTS In differentiated SH-SY5Y cells with reduced expression of γ1-syntrophin, the association of γ-enolase with the Trk receptor was diminished due to impaired translocation of γ-enolase towards the plasma membrane or impaired Trk activity. Treatment of differentiated SH-SY5Y cells with a γ-Eno peptide that mimics γ-enolase neurotrophic activity promoted Trk receptor internalisation and endosomal trafficking, as defined by reduced levels of Trk in clathrin-coated vesicles and increased levels in late endosomes. In this way, γ-enolase triggers Rap1 activation, which is required for neurotrophic activity of γ-enolase. Additionally, the inhibition of Trk kinase activity by K252a revealed that increased SH-SY5Y cell survival and neurite outgrowth mediated by the γ-Eno peptide through activation of signalling cascade depends on Trk kinase activity. CONCLUSIONS These data therefore establish the Trk receptor as a binding partner of γ-enolase, whereby Trk endosomal trafficking is promoted by γ-Eno peptide to mediate its neurotrophic signalling. Video abstract.
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Affiliation(s)
- Anja Pišlar
- Department of Pharmaceutical Biology, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia.
| | - Janko Kos
- Department of Pharmaceutical Biology, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia.,Department of Biotechnology, Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
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11
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Allen TA, Cullen MM, Hawkey N, Mochizuki H, Nguyen L, Schechter E, Borst L, Yoder JA, Freedman JA, Patierno SR, Cheng K, Eward WC, Somarelli JA. A Zebrafish Model of Metastatic Colonization Pinpoints Cellular Mechanisms of Circulating Tumor Cell Extravasation. Front Oncol 2021; 11:641187. [PMID: 34631514 PMCID: PMC8495265 DOI: 10.3389/fonc.2021.641187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 08/31/2021] [Indexed: 01/18/2023] Open
Abstract
Metastasis is a multistep process in which cells must detach, migrate/invade local structures, intravasate, circulate, extravasate, and colonize. A full understanding of the complexity of this process has been limited by the lack of ability to study these steps in isolation with detailed molecular analyses. Leveraging a comparative oncology approach, we injected canine osteosarcoma cells into the circulation of transgenic zebrafish with fluorescent blood vessels in a biologically dynamic metastasis extravasation model. Circulating tumor cell clusters that successfully extravasated the vasculature as multicellular units were isolated under intravital imaging (n = 6). These extravasation-positive tumor cell clusters sublines were then molecularly profiled by RNA-Seq. Using a systems-level analysis, we pinpointed the downregulation of KRAS signaling, immune pathways, and extracellular matrix (ECM) organization as enriched in extravasated cells (p < 0.05). Within the extracellular matrix remodeling pathway, we identified versican (VCAN) as consistently upregulated and central to the ECM gene regulatory network (p < 0.05). Versican expression is prognostic for a poorer metastasis-free and overall survival in patients with osteosarcoma. Together, our results provide a novel experimental framework to study discrete steps in the metastatic process. Using this system, we identify the versican/ECM network dysregulation as a potential contributor to osteosarcoma circulating tumor cell metastasis.
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Affiliation(s)
- Tyler A Allen
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States
| | - Mark M Cullen
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States
| | - Nathan Hawkey
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States
| | - Hiroyuki Mochizuki
- Department of Molecular Biomedical Sciences and Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States
| | - Lan Nguyen
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States
| | - Elyse Schechter
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States
| | - Luke Borst
- Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, United States
| | - Jeffrey A Yoder
- Department of Molecular Biomedical Sciences and Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States
| | - Jennifer A Freedman
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States.,Department of Medicine, Division of Medical Oncology, Duke University Medical Center, Durham, NC, United States
| | - Steven R Patierno
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States.,Department of Medicine, Division of Medical Oncology, Duke University Medical Center, Durham, NC, United States
| | - Ke Cheng
- Department of Molecular Biomedical Sciences and Comparative Medicine Institute, North Carolina State University, Raleigh, NC, United States.,Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, United States
| | - William C Eward
- Department of Orthopedics, Duke University Medical Center, Durham, NC, United States
| | - Jason A Somarelli
- Duke Cancer Institute, Duke University Medical Center, Durham, NC, United States.,Department of Medicine, Division of Medical Oncology, Duke University Medical Center, Durham, NC, United States
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12
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Wang Y, Yi N, Hu Y, Zhou X, Jiang H, Lin Q, Chen R, Liu H, Gu Y, Tong C, Lu M, Zhang J, Zhang B, Peng L, Li L. Molecular Signatures and Networks of Cardiomyocyte Differentiation in Humans and Mice. MOLECULAR THERAPY. NUCLEIC ACIDS 2020; 21:696-711. [PMID: 32769060 PMCID: PMC7412763 DOI: 10.1016/j.omtn.2020.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/05/2020] [Accepted: 07/06/2020] [Indexed: 12/23/2022]
Abstract
Cardiomyocyte differentiation derived from embryonic stem cells (ESCs) is a complex process involving molecular regulation of multiple levels. In this study, we first identify and compare differentially expressed gene (DEG) signatures of ESC-derived cardiomyocyte differentiation (ESCDCD) in humans and mice. Then, the multiscale embedded gene co-expression network analysis (MEGENA) of the human ESCDCD dataset is performed to identify 212 significantly co-expressed gene modules, which capture well the regulatory information of cardiomyocyte differentiation. Three modules respectively involved in the regulation of stem cell pluripotency, Wnt, and calcium pathways are enriched in the DEG signatures of the differentiation phase transition in the two species. Three human-specific cardiomyocyte differentiation phase transition modules are identified. Moreover, the potential regulation mechanisms of transcription factors during cardiomyocyte differentiation are also illustrated. Finally, several novel key drivers of ESCDCD are identified with the evidence of their expression during mouse embryonic cardiomyocyte differentiation. Using an integrative network analysis, the core molecular signatures and gene subnetworks (modules) underlying cardiomyocyte lineage commitment are identified in both humans and mice. Our findings provide a global picture of gene-gene co-regulation and identify key regulators during ESCDCD.
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Affiliation(s)
- Yumei Wang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Na Yi
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Yi Hu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Xianxiao Zhou
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Mount Sinai Center for Transformative Disease Modeling, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Hanyu Jiang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Qin Lin
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Rou Chen
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Huan Liu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China
| | - Yanqiong Gu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Chang Tong
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Min Lu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Junfang Zhang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China
| | - Bin Zhang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Mount Sinai Center for Transformative Disease Modeling, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Icahn Institute for Data Science and Genomic Technology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Luying Peng
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China.
| | - Li Li
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Medical Genetics, Tongji University School of Medicine, Shanghai 200092, China; Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Shanghai 200092, China.
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13
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Wojdyla K, Collier AJ, Fabian C, Nisi PS, Biggins L, Oxley D, Rugg-Gunn PJ. Cell-Surface Proteomics Identifies Differences in Signaling and Adhesion Protein Expression between Naive and Primed Human Pluripotent Stem Cells. Stem Cell Reports 2020; 14:972-988. [PMID: 32302559 PMCID: PMC7220956 DOI: 10.1016/j.stemcr.2020.03.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 03/17/2020] [Accepted: 03/18/2020] [Indexed: 12/19/2022] Open
Abstract
Naive and primed human pluripotent stem cells (hPSC) provide valuable models to study cellular and molecular developmental processes. The lack of detailed information about cell-surface protein expression in these two pluripotent cell types prevents an understanding of how the cells communicate and interact with their microenvironments. Here, we used plasma membrane profiling to directly measure cell-surface protein expression in naive and primed hPSC. This unbiased approach quantified over 1,700 plasma membrane proteins, including those involved in cell adhesion, signaling, and cell interactions. Notably, multiple cytokine receptors upstream of JAK-STAT signaling were more abundant in naive hPSC. In addition, functional experiments showed that FOLR1 and SUSD2 proteins are highly expressed at the cell surface in naive hPSC but are not required to establish human naive pluripotency. This study provides a comprehensive stem cell proteomic resource that uncovers differences in signaling pathway activity and has identified new markers to define human pluripotent states.
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Affiliation(s)
- Katarzyna Wojdyla
- Epigenetics Programme, The Babraham Institute, Cambridge, UK; Mass Spectrometry Facility, The Babraham Institute, Cambridge, UK
| | | | - Charlene Fabian
- Epigenetics Programme, The Babraham Institute, Cambridge, UK
| | - Paola S Nisi
- Epigenetics Programme, The Babraham Institute, Cambridge, UK
| | - Laura Biggins
- Bioinformatics Group, The Babraham Institute, Cambridge, UK
| | - David Oxley
- Mass Spectrometry Facility, The Babraham Institute, Cambridge, UK
| | - Peter J Rugg-Gunn
- Epigenetics Programme, The Babraham Institute, Cambridge, UK; Wellcome-Medical Research Council Cambridge Stem Cell Institute, Cambridge, UK.
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14
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Scalable Generation of Mesenchymal Stem Cells and Adipocytes from Human Pluripotent Stem Cells. Cells 2020; 9:cells9030710. [PMID: 32183164 PMCID: PMC7140720 DOI: 10.3390/cells9030710] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/04/2020] [Accepted: 03/09/2020] [Indexed: 02/06/2023] Open
Abstract
Human pluripotent stem cells (hPSCs) can provide unlimited supply for mesenchymal stem cells (MSCs) and adipocytes that can be used for therapeutic applications. Here we developed a simple and highly efficient all-trans-retinoic acid (RA)-based method for generating an off-the-shelf and scalable number of human pluripotent stem cell (hPSC)-derived MSCs with enhanced adipogenic potential. We showed that short exposure of multiple hPSC lines (hESCs/hiPSCs) to 10 μM RA dramatically enhances embryoid body (EB) formation through regulation of genes activating signaling pathways associated with cell proliferation, survival and adhesion, among others. Disruption of cell adhesion induced the subsequent differentiation of the highly expanded RA-derived EB-forming cells into a pure population of multipotent MSCs (up to 1542-fold increase in comparison to RA-untreated counterparts). Interestingly, the RA-derived MSCs displayed enhanced differentiation potential into adipocytes. Thus, these findings present a novel RA-based approach for providing an unlimited source of MSCs and adipocytes that can be used for regenerative medicine, drug screening and disease modeling applications.
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15
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Aceto N. Bring along your friends: Homotypic and heterotypic circulating tumor cell clustering to accelerate metastasis. Biomed J 2020; 43:18-23. [PMID: 32200952 PMCID: PMC7090281 DOI: 10.1016/j.bj.2019.11.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/01/2019] [Accepted: 11/07/2019] [Indexed: 11/23/2022] Open
Abstract
Metastasis formation is a hallmark of invasive cancers and it is achieved through the shedding of circulating tumor cells (CTCs) from the primary site into the blood circulation. There, CTCs are found as single cells or as multicellular clusters, with clusters carrying an elevated ability to survive within the bloodstream and initiate new metastatic lesions at distant sites. Clusters of CTCs include homotypic clusters made of cancer cells only, as well as heterotypic clusters that incorporate stromal or immune cells along with cancer cells. Both homotypic and heterotypic CTC clusters are characterized by a high metastasis-forming capability, high proliferation rate and by distinct molecular features compared to single CTCs, and their presence in the peripheral circulation of cancer patients is generally associated with a poor prognosis. In this short review, we summarize the current literature that describes homotypic and heterotypic CTC clusters, both in the context of their molecular characteristics as well as their value in the clinical setting. While CTC clusters have only recently emerged as key players in the metastatic process and many aspects of their biology remain to be investigated, a detailed understanding of their vulnerabilities may pave the way towards the generation of new metastasis-suppressing agents.
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Affiliation(s)
- Nicola Aceto
- Department of Biomedicine, Cancer Metastasis Laboratory, University of Basel and University Hospital Basel, Basel, Switzerland.
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16
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Li Y, Wu S, Li X, Guo S, Cai Z, Yin Z, Zhang Y, Liu Z. Wnt signaling associated small molecules improve the viability of pPSCs in a PI3K/Akt pathway dependent way. J Cell Physiol 2020; 235:5811-5822. [DOI: 10.1002/jcp.29514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 01/08/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Yan Li
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
| | - Shuang Wu
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
| | - Xuechun Li
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
| | - Shimeng Guo
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
| | - Zhuang Cai
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
| | - Zhi Yin
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
| | - Yu Zhang
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
| | - Zhonghua Liu
- Laboratory of Embryo BiotechnologyCollege of Life Science, Northeast Agricultural UniversityHarbin China
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17
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Ye T, Li J, Sun Z, Liu D, Zeng B, Zhao Q, Wang J, Xing HR. Cdh1 functions as an oncogene by inducing self-renewal of lung cancer stem-like cells via oncogenic pathways. Int J Biol Sci 2020; 16:447-459. [PMID: 32015681 PMCID: PMC6990901 DOI: 10.7150/ijbs.38672] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/04/2019] [Indexed: 01/01/2023] Open
Abstract
The mortality rate of lung cancer remains the highest amongst all cancers despite of new therapeutic developments. While cancer stem cells (CSCs) may play a pivotal role in cancer, mechanisms underlying CSCs self-renewal and their relevance to cancer progression have not been clearly elucidated due to the lack of reliable and stable CSC cellular models. In the present study, we unveiled the novel oncogene function of cadherin 1 (Cdh1) via bioinformatic analysis in a broad spectrum of human cancers including lung adenocarcinoma (LUAD), adding a new dimension to the widely reported tumor suppressor function of Cdh1. Experimentally, we show for the first time that Cdh1 promotes the self-renewal of lung CSCs, consistent with its function in embryonic and normal stem cells. Using the LLC-Symmetric Division (LLC-SD) model, we have revealed an intricate cross-talk between the oncogenic pathway and stem cell pathway in which Cdh1 functions as an oncogene by promoting lung CSC renewal via the activation of the Phosphoinositide 3-kinase (PI3K) and inhibition of Mitogen-activated protein kinase (MAPK) pathways, respectively. In summary, this study has provided evidence demonstrating effective utilization of the normal stem cell renewal mechanisms by CSCs to promote oncogenesis and progression.
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Affiliation(s)
- Ting Ye
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China.,Department of Laboratory Medicine, the Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jingyuan Li
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China
| | - Zhiwei Sun
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China
| | - Doudou Liu
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China
| | - Bin Zeng
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China
| | - Qiting Zhao
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China
| | - Jianyu Wang
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China.,Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China
| | - H Rosie Xing
- Laboratory of Translational Cancer Stem Cell Research, Chongqing Medical University, Chongqing, China.,College of Biomedical Engineering, State Key Laboratory of Ultrasound Engineering in Medicine, Chongqing Medical University, Chongqing, China
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18
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Gkountela S, Castro-Giner F, Szczerba BM, Vetter M, Landin J, Scherrer R, Krol I, Scheidmann MC, Beisel C, Stirnimann CU, Kurzeder C, Heinzelmann-Schwarz V, Rochlitz C, Weber WP, Aceto N. Circulating Tumor Cell Clustering Shapes DNA Methylation to Enable Metastasis Seeding. Cell 2019; 176:98-112.e14. [PMID: 30633912 PMCID: PMC6363966 DOI: 10.1016/j.cell.2018.11.046] [Citation(s) in RCA: 513] [Impact Index Per Article: 102.6] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/31/2018] [Accepted: 11/28/2018] [Indexed: 01/01/2023]
Abstract
The ability of circulating tumor cells (CTCs) to form clusters has been linked to increased metastatic potential. Yet biological features and vulnerabilities of CTC clusters remain largely unknown. Here, we profile the DNA methylation landscape of single CTCs and CTC clusters from breast cancer patients and mouse models on a genome-wide scale. We find that binding sites for stemness- and proliferation-associated transcription factors are specifically hypomethylated in CTC clusters, including binding sites for OCT4, NANOG, SOX2, and SIN3A, paralleling embryonic stem cell biology. Among 2,486 FDA-approved compounds, we identify Na+/K+ ATPase inhibitors that enable the dissociation of CTC clusters into single cells, leading to DNA methylation remodeling at critical sites and metastasis suppression. Thus, our results link CTC clustering to specific changes in DNA methylation that promote stemness and metastasis and point to cluster-targeting compounds to suppress the spread of cancer.
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Affiliation(s)
- Sofia Gkountela
- Cancer Metastasis Laboratory, Department of Biomedicine, University of Basel and University Hospital Basel, 4058 Basel, Switzerland
| | - Francesc Castro-Giner
- Cancer Metastasis Laboratory, Department of Biomedicine, University of Basel and University Hospital Basel, 4058 Basel, Switzerland; SIB Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland
| | - Barbara Maria Szczerba
- Cancer Metastasis Laboratory, Department of Biomedicine, University of Basel and University Hospital Basel, 4058 Basel, Switzerland
| | - Marcus Vetter
- Gynecologic Cancer Center, University Hospital Basel, 4056 Basel, Switzerland; Department of Medical Oncology, University Hospital Basel, 4056 Basel, Switzerland
| | - Julia Landin
- Department of Medical Oncology, University Hospital Basel, 4056 Basel, Switzerland; Breast Center, University Hospital Basel and University of Basel, 4031 Basel, Switzerland
| | - Ramona Scherrer
- Cancer Metastasis Laboratory, Department of Biomedicine, University of Basel and University Hospital Basel, 4058 Basel, Switzerland
| | - Ilona Krol
- Cancer Metastasis Laboratory, Department of Biomedicine, University of Basel and University Hospital Basel, 4058 Basel, Switzerland
| | - Manuel C Scheidmann
- Cancer Metastasis Laboratory, Department of Biomedicine, University of Basel and University Hospital Basel, 4058 Basel, Switzerland
| | - Christian Beisel
- Department of Biosystems Science and Engineering, ETH Zurich, 4058 Basel, Switzerland
| | | | - Christian Kurzeder
- Gynecologic Cancer Center, University Hospital Basel, 4056 Basel, Switzerland; Breast Center, University Hospital Basel and University of Basel, 4031 Basel, Switzerland
| | | | - Christoph Rochlitz
- Department of Medical Oncology, University Hospital Basel, 4056 Basel, Switzerland
| | - Walter Paul Weber
- Breast Center, University Hospital Basel and University of Basel, 4031 Basel, Switzerland
| | - Nicola Aceto
- Cancer Metastasis Laboratory, Department of Biomedicine, University of Basel and University Hospital Basel, 4058 Basel, Switzerland.
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19
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Devaux CA, Mezouar S, Mege JL. The E-Cadherin Cleavage Associated to Pathogenic Bacteria Infections Can Favor Bacterial Invasion and Transmigration, Dysregulation of the Immune Response and Cancer Induction in Humans. Front Microbiol 2019; 10:2598. [PMID: 31781079 PMCID: PMC6857109 DOI: 10.3389/fmicb.2019.02598] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/25/2019] [Indexed: 12/21/2022] Open
Abstract
Once bound to the epithelium, pathogenic bacteria have to cross epithelial barriers to invade their human host. In order to achieve this goal, they have to destroy the adherens junctions insured by cell adhesion molecules (CAM), such as E-cadherin (E-cad). The invasive bacteria use more or less sophisticated mechanisms aimed to deregulate CAM genes expression or to modulate the cell-surface expression of CAM proteins, which are otherwise rigorously regulated by a molecular crosstalk essential for homeostasis. Apart from the repression of CAM genes, a drastic decrease in adhesion molecules on human epithelial cells can be obtained by induction of eukaryotic endoproteases named sheddases or through synthesis of their own (prokaryotic) sheddases. Cleavage of CAM by sheddases results in the release of soluble forms of CAM. The overexpression of soluble CAM in body fluids can trigger inflammation and pro-carcinogenic programming leading to tumor induction and metastasis. In addition, the reduction of the surface expression of E-cad on epithelia could be accompanied by an alteration of the anti-bacterial and anti-tumoral immune responses. This immune response dysfunction is likely to occur through the deregulation of immune cells homing, which is controlled at the level of E-cad interaction by surface molecules αE integrin (CD103) and lectin receptor KLRG1. In this review, we highlight the central role of CAM cell-surface expression during pathogenic microbial invasion, with a particular focus on bacterial-induced cleavage of E-cad. We revisit herein the rapidly growing body of evidence indicating that high levels of soluble E-cad (sE-cad) in patients’ sera could serve as biomarker of bacterial-induced diseases.
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Affiliation(s)
- Christian A Devaux
- IRD, MEPHI, APHM, Aix-Marseille University, Marseille, France.,CNRS, Institute of Biological Science (INSB), Marseille, France.,Institut Hospitalo-Universitaire (IHU)-Mediterranee Infection, Marseille, France
| | - Soraya Mezouar
- IRD, MEPHI, APHM, Aix-Marseille University, Marseille, France.,Institut Hospitalo-Universitaire (IHU)-Mediterranee Infection, Marseille, France
| | - Jean-Louis Mege
- IRD, MEPHI, APHM, Aix-Marseille University, Marseille, France.,Institut Hospitalo-Universitaire (IHU)-Mediterranee Infection, Marseille, France.,APHM, UF Immunology Department, Marseille, France
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20
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Narayana YV, Gadgil C, Mote RD, Rajan R, Subramanyam D. Clathrin-Mediated Endocytosis Regulates a Balance between Opposing Signals to Maintain the Pluripotent State of Embryonic Stem Cells. Stem Cell Reports 2018; 12:152-164. [PMID: 30554918 PMCID: PMC6335602 DOI: 10.1016/j.stemcr.2018.11.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 11/16/2018] [Accepted: 11/19/2018] [Indexed: 12/12/2022] Open
Abstract
Endocytosis is implicated in the maintenance of embryonic stem cell (ESC) pluripotency, although its exact role and the identity of molecular players remain poorly understood. Here, we show that the clathrin heavy chain (CLTC), involved in clathrin-mediated endocytosis (CME), is vital for maintaining mouse ESC (mESC) pluripotency. Knockdown of Cltc resulted in a loss of pluripotency accompanied by reduced E-cadherin (E-CAD) levels and increased levels of transforming growth factor β (TGF-β) and extracellular signal-regulated kinase (ERK) signaling. We demonstrate that both E-CAD and TGF-β receptor type 1 (TGF-βR1) are internalized through CME in mESCs. While E-CAD is recycled, TGF-βR1 is targeted for lysosomal degradation thus maintaining inverse levels of these molecules. Finally, we show that E-CAD interacts with ERK, and that the decreased pluripotency upon CME loss can be rescued by inhibiting TGF-βR, MEK, and GSK3β, or overexpressing E-CAD. Our results demonstrate that CME is critical for balancing signaling outputs to regulate ESC pluripotency, and possibly cell fate choices in early development. Knockdown of Cltc results in loss of mESC pluripotency CME regulates E-CAD and TGF-βR1 trafficking in mESCs ESCs lacking CME can be rescued by TGF-βR1/MEK inhibition or E-CAD overexpression CME balances opposing signaling outputs to maintain ESC pluripotency
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Affiliation(s)
- Yadavalli V Narayana
- National Centre for Cell Science, SP Pune University, Ganeshkhind, Pune 411007, India; Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India
| | - Chetan Gadgil
- Chemical Engineering Department, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Ridim D Mote
- National Centre for Cell Science, SP Pune University, Ganeshkhind, Pune 411007, India
| | - Raghav Rajan
- Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, NCL Colony, Pune 411008, India
| | - Deepa Subramanyam
- National Centre for Cell Science, SP Pune University, Ganeshkhind, Pune 411007, India.
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21
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Evidence of Extracellular Vesicles Biogenesis and Release in Mouse Embryonic Stem Cells. Stem Cell Rev Rep 2018; 14:262-276. [PMID: 29032399 DOI: 10.1007/s12015-017-9776-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Extracellular vesicles (EVs) released by mouse embryonic stem cells (mESCs) are considered a source of bioactive molecules that modulate their microenvironment by acting on intercellular communication. Either intracellular endosomal machinery or their derived EVs have been considered a relevant system of signal circuits processing. Herein, we show that these features are found in mESCs. Ultrastructural analysis revealed structures and organelles of the endosomal system such as coated pits and endocytosis-related vesicles, prominent rough endoplasmic reticulum and Golgi apparatus, and multivesicular bodies (MVBs) containing either few or many intraluminal vesicles (ILVs) that could be released as exosomes to extracellular milieu. Besides, budding vesicles shed from the plasma membrane to the extracellular space is suggestive of microvesicle biogenesis in mESCs. mESCs and mouse blastocyst express specific markers of the Endosomal Sorting Complex Required for Transport (ESCRT) system. Ultrastructural analysis and Nanoparticle Tracking Analysis (NTA) of isolated EVs revealed a heterogeneous population of exosomes and microvesicles released by mESCs. These vesicles contain Wnt10b and the Notch ligand Delta-like 4 (DLL4) and also the co-chaperone stress inducible protein 1 (STI1) and its partner Hsp90. Wnt10b and Dll4 colocalize with EVs biogenesis markers in mESCs. Overall, the present study supports the function of the mESCs endocytic network and their EVs as players in stem cell biology.
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22
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Shah S, Brock EJ, Jackson RM, Ji K, Boerner JL, Sloane BF, Mattingly RR. Downregulation of Rap1Gap: A Switch from DCIS to Invasive Breast Carcinoma via ERK/MAPK Activation. Neoplasia 2018; 20:951-963. [PMID: 30144784 PMCID: PMC6106701 DOI: 10.1016/j.neo.2018.07.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 07/06/2018] [Accepted: 07/12/2018] [Indexed: 01/13/2023] Open
Abstract
Diagnosis of breast ductal carcinoma in situ (DCIS) presents a challenge since we cannot yet distinguish those cases that would remain indolent and not require aggressive treatment from cases that may progress to invasive ductal cancer (IDC). The purpose of this study is to determine the role of Rap1Gap, a GTPase activating protein, in the progression from DCIS to IDC. Immunohistochemistry (IHC) analysis of samples from breast cancer patients shows an increase in Rap1Gap expression in DCIS compared to normal breast tissue and IDCs. In order to study the mechanisms of malignant progression, we employed an in vitro three-dimensional (3D) model that more accurately recapitulates both structural and functional cues of breast tissue. Immunoblotting results show that Rap1Gap levels in MCF10.Ca1D cells (a model of invasive carcinoma) are reduced compared to those in MCF10.DCIS (a model of DCIS). Retroviral silencing of Rap1Gap in MCF10.DCIS cells activated extracellular regulated kinase (ERK) mitogen-activated protein kinase (MAPK), induced extensive cytoskeletal reorganization and acquisition of mesenchymal phenotype, and enhanced invasion. Enforced reexpression of Rap1Gap in MCF10.DCIS-Rap1GapshRNA cells reduced Rap1 activity and reversed the mesenchymal phenotype. Similarly, introduction of dominant negative Rap1A mutant (Rap1A-N17) in DCIS-Rap1Gap shRNA cells caused a reversion to nonmalignant phenotype. Conversely, expression of constitutively active Rap1A mutant (Rap1A-V12) in noninvasive MCF10.DCIS cells led to phenotypic changes that were reminiscent of Rap1Gap knockdown. Thus, reduction of Rap1Gap in DCIS is a potential switch for progression to an invasive phenotype. The Graphical Abstract summarizes these findings.
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Affiliation(s)
- Seema Shah
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Ethan J Brock
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Ryan M Jackson
- Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Kyungmin Ji
- Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Julie L Boerner
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Bonnie F Sloane
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, USA
| | - Raymond R Mattingly
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI, USA; Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, USA.
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23
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Tamura S, Isobe T, Ariyama H, Nakano M, Kikushige Y, Takaishi S, Kusaba H, Takenaka K, Ueki T, Nakamura M, Akashi K, Baba E. E‑cadherin regulates proliferation of colorectal cancer stem cells through NANOG. Oncol Rep 2018; 40:693-703. [PMID: 29845283 PMCID: PMC6072297 DOI: 10.3892/or.2018.6464] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 05/17/2018] [Indexed: 12/30/2022] Open
Abstract
Cancer stem cells (CSCs) possess a self-renewal ability and display tumorigenic potential in immunodeficient mice. Colorectal CSCs are thought to be a uniform population and no functionally distinct subpopulations have been identified. Because E-cadherin is an essential molecule for self-renewal of embryonic stem cells, we examined E-cadherin expression, which may play a role in maintaining the properties of CSCs, in EpCAMhigh/CD44+ colorectal CSCs from human primary colorectal cancers. We obtained 18 surgical specimens of human primary colorectal cancer. CD44, EpCAM, and E-cadherin expression were analyzed by fluorescence-activated cell sorting. Sorted EpCAMhigh/CD44+ colorectal CSCs were injected into immunodeficient mice to estimate the tumorigenic potential. Genetic profiles were analyzed by cDNA microarray. Notably, colorectal CSCs could be divided into two populations based on the E-cadherin expression status, and they exhibited different pathological characteristics. Compared to E-cadherin-negative colorectal CSCs, E-cadherin-positive (EC+) colorectal CSCs demonstrated higher tumor growth potential in vivo. EC+ colorectal CSCs revealed a higher expression of the pluripotency factor NANOG, which contributed to the higher tumor growth potential of EC+ colorectal CSCs through control of cyclin D1 expression. These findings are the first demonstration of functionally distinct subpopulations of colorectal CSCs in human clinical samples.
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Affiliation(s)
- Shingo Tamura
- Department of Medicine, Kyushu University, Fukuoka 812‑8582, Japan
| | - Taichi Isobe
- Department of Medicine, Kyushu University, Fukuoka 812‑8582, Japan
| | - Hiroshi Ariyama
- Department of Medicine, Kyushu University, Fukuoka 812‑8582, Japan
| | - Michitaka Nakano
- Department of Medicine, Kyushu University, Fukuoka 812‑8582, Japan
| | | | - Shigeo Takaishi
- Department of Medicine, Kyushu University, Fukuoka 812‑8582, Japan
| | - Hitoshi Kusaba
- Department of Comprehensive Clinical Oncology, Faculty of Medical Sciences, Kyushu University, Fukuoka 812‑8582, Japan
| | - Katsuto Takenaka
- Department of Medicine, Kyushu University, Fukuoka 812‑8582, Japan
| | - Takashi Ueki
- Department of Surgery and Oncology, Kyushu University, Fukuoka 812‑8582, Japan
| | - Masafumi Nakamura
- Department of Surgery and Oncology, Kyushu University, Fukuoka 812‑8582, Japan
| | - Koichi Akashi
- Department of Medicine, Kyushu University, Fukuoka 812‑8582, Japan
| | - Eishi Baba
- Department of Comprehensive Clinical Oncology, Faculty of Medical Sciences, Kyushu University, Fukuoka 812‑8582, Japan
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24
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Cui N, Yang WT, Zheng PS. Slug inhibits the proliferation and tumor formation of human cervical cancer cells by up-regulating the p21/p27 proteins and down-regulating the activity of the Wnt/β-catenin signaling pathway via the trans-suppression Akt1/p-Akt1 expression. Oncotarget 2018; 7:26152-67. [PMID: 27036045 PMCID: PMC5041971 DOI: 10.18632/oncotarget.8434] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/14/2016] [Indexed: 11/17/2022] Open
Abstract
Slug (Snai2) has been demonstrated to act as an oncogene or tumor suppressor in different human cancers, but the function of Slug in cervical cancer remains poorly understood. In this study, we demonstrated that Slug could suppress the proliferation of cervical cancer cells in vitro and tumor formation in vivo. Further experiments found that Slug could trans-suppress the expression of Akt1/p-Akt1 by binding to E-box motifs in the promoter of the Akt1 gene and then inhibit the cell proliferation and tumor formation of cervical cancer cells by up-regulating p21/p27 and/or down-regulating the activity of the Wnt/β-catenin signaling pathway. Therefore, Slug acts as a tumor suppressor during cervical carcinogenesis.
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Affiliation(s)
- Nan Cui
- Department of Reproductive Medicine, First Affiliated Hospital, Xi'an Jiaotong University Medical School, Xi'an, The People's Republic of China.,Department of Biochemistry and Molecular Biology, Xi'an Jiaotong University Medical School, Xi'an, The People's Republic of China
| | - Wen-Ting Yang
- Department of Reproductive Medicine, First Affiliated Hospital, Xi'an Jiaotong University Medical School, Xi'an, The People's Republic of China.,Section of Cancer Stem Cell Research, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of the People's Republic of China, Xi'an, The People's Republic of China
| | - Peng-Sheng Zheng
- Department of Reproductive Medicine, First Affiliated Hospital, Xi'an Jiaotong University Medical School, Xi'an, The People's Republic of China.,Section of Cancer Stem Cell Research, Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of the People's Republic of China, Xi'an, The People's Republic of China
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25
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Kim MH, Kino-oka M. Bioprocessing Strategies for Pluripotent Stem Cells Based on Waddington’s Epigenetic Landscape. Trends Biotechnol 2018; 36:89-104. [DOI: 10.1016/j.tibtech.2017.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 10/02/2017] [Accepted: 10/10/2017] [Indexed: 12/12/2022]
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26
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Mote RD, Mahajan G, Padmanabhan A, Ambati R, Subramanyam D. Dual repression of endocytic players by ESCC microRNAs and the Polycomb complex regulates mouse embryonic stem cell pluripotency. Sci Rep 2017; 7:17572. [PMID: 29242593 PMCID: PMC5730570 DOI: 10.1038/s41598-017-17828-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 11/30/2017] [Indexed: 01/08/2023] Open
Abstract
Cell fate determination in the early mammalian embryo is regulated by multiple mechanisms. Recently, genes involved in vesicular trafficking have been shown to play an important role in cell fate choice, although the regulation of their expression remains poorly understood. Here we demonstrate for the first time that multiple endocytosis associated genes (EAGs) are repressed through a novel, dual mechanism in mouse embryonic stem cells (mESCs). This involves the action of the Polycomb Repressive Complex, PRC2, as well as post-transcriptional regulation by the ESC-specific cell cycle-regulating (ESCC) family of microRNAs. This repression is relieved upon differentiation. Forced expression of EAGs in mESCs results in a decrease in pluripotency, highlighting the importance of dual repression in cell fate regulation. We propose that endocytosis is critical for cell fate choice, and dual repression may function to tightly regulate levels of endocytic genes.
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Affiliation(s)
- Ridim Dadasaheb Mote
- National Centre for Cell Science, SP Pune University, Ganeshkhind, Pune, 411007, India
| | - Gaurang Mahajan
- National Centre for Cell Science, SP Pune University, Ganeshkhind, Pune, 411007, India
| | - Anup Padmanabhan
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore, 117411, Singapore
| | - Ramaraju Ambati
- National Centre for Cell Science, SP Pune University, Ganeshkhind, Pune, 411007, India
| | - Deepa Subramanyam
- National Centre for Cell Science, SP Pune University, Ganeshkhind, Pune, 411007, India.
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27
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Guichard A, Jain P, Moayeri M, Schwartz R, Chin S, Zhu L, Cruz-Moreno B, Liu JZ, Aguilar B, Hollands A, Leppla SH, Nizet V, Bier E. Anthrax edema toxin disrupts distinct steps in Rab11-dependent junctional transport. PLoS Pathog 2017; 13:e1006603. [PMID: 28945820 PMCID: PMC5612732 DOI: 10.1371/journal.ppat.1006603] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 08/24/2017] [Indexed: 02/06/2023] Open
Abstract
Various bacterial toxins circumvent host defenses through overproduction of cAMP. In a previous study, we showed that edema factor (EF), an adenylate cyclase from Bacillus anthracis, disrupts endocytic recycling mediated by the small GTPase Rab11. As a result, cargo proteins such as cadherins fail to reach inter-cellular junctions. In the present study, we provide further mechanistic dissection of Rab11 inhibition by EF using a combination of Drosophila and mammalian systems. EF blocks Rab11 trafficking after the GTP-loading step, preventing a constitutively active form of Rab11 from delivering cargo vesicles to the plasma membrane. Both of the primary cAMP effector pathways -PKA and Epac/Rap1- contribute to inhibition of Rab11-mediated trafficking, but act at distinct steps of the delivery process. PKA acts early, preventing Rab11 from associating with its effectors Rip11 and Sec15. In contrast, Epac functions subsequently via the small GTPase Rap1 to block fusion of recycling endosomes with the plasma membrane, and appears to be the primary effector of EF toxicity in this process. Similarly, experiments conducted in mammalian systems reveal that Epac, but not PKA, mediates the activity of EF both in cell culture and in vivo. The small GTPase Arf6, which initiates endocytic retrieval of cell adhesion components, also contributes to junctional homeostasis by counteracting Rab11-dependent delivery of cargo proteins at sites of cell-cell contact. These studies have potentially significant practical implications, since chemical inhibition of either Arf6 or Epac blocks the effect of EF in cell culture and in vivo, opening new potential therapeutic avenues for treating symptoms caused by cAMP-inducing toxins or related barrier-disrupting pathologies. Recent anthrax outbreaks in Zambia and northern Russia and biodefense preparedness highlight the need for new therapies to counteract fatal late-stage pathologies in patients infected with Bacillus anthracis. Indeed, two toxins secreted by this pathogen—edema toxin (ET) and lethal toxin (LT)—can cause death in face of effective antibiotic treatment. ET, a potent adenylate cyclase, severely impacts host cells and tissues through an overproduction of the ubiquitous second messenger cAMP. Previously, we identified Rab11 as a key host factor inhibited by ET. Blockade of Rab11-dependent endocytic recycling resulted in the disruption of intercellular junctions, likely contributing to life threatening vascular effusion observed in anthrax patients. Here we present a multi-system analysis of the mechanism by which EF inhibits Rab11 and exocyst-dependent trafficking. Epistasis experiments in Drosophila reveal that over-activation of the cAMP effectors PKA and Epac/Rap1 interferes with Rab11-mediated trafficking at two distinct steps. We further describe conserved roles of Epac and the small GTPase Arf6 in ET-mediated disruption of vesicular trafficking and show how chemical inhibition of either pathway greatly alleviates ET-induced edema. Thus, our study defines Epac and Arf6 as promising drug targets for the treatment of infectious diseases and other pathologies involving cAMP overload or related barrier disruption.
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Affiliation(s)
- Annabel Guichard
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, United States of America
| | - Prashant Jain
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, United States of America
| | - Mahtab Moayeri
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD, United States of America
| | - Ruth Schwartz
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, United States of America
| | - Stephen Chin
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, United States of America
| | - Lin Zhu
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, United States of America
| | - Beatriz Cruz-Moreno
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, United States of America
| | - Janet Z. Liu
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, United States of America
| | - Bernice Aguilar
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, United States of America
- Division of Pediatric Infectious Diseases and the Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, United States of America
| | - Andrew Hollands
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, United States of America
| | - Stephen H. Leppla
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD, United States of America
| | - Victor Nizet
- Department of Pediatrics, University of California, San Diego, La Jolla, CA, United States of America
- Skaggs School of Pharmacy & Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, United States of America
| | - Ethan Bier
- Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, United States of America
- * E-mail:
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28
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Sart S, Bejoy J, Li Y. Characterization of 3D pluripotent stem cell aggregates and the impact of their properties on bioprocessing. Process Biochem 2017. [DOI: 10.1016/j.procbio.2016.05.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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29
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An autocrine inflammatory forward-feedback loop after chemotherapy withdrawal facilitates the repopulation of drug-resistant breast cancer cells. Cell Death Dis 2017; 8:e2932. [PMID: 28703802 PMCID: PMC5550865 DOI: 10.1038/cddis.2017.319] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 05/03/2017] [Accepted: 06/08/2017] [Indexed: 12/17/2022]
Abstract
Stromal cells, infiltrating immune cells, paracrine factors and extracellular matrix have been extensively studied in cancers. However, autocrine factors produced by tumor cells and communications between autocrine factors and intracellular signaling pathways in the development of drug resistance, cancer stem-like cells (CSCs) and tumorigenesis have not been well investigated, and the precise mechanism and tangible approaches remain elusive. Here we reveal a new mechanism by which cytokines produced by breast cancer cells after chemotherapy withdrawal activate both Wnt/β-catenin and NF-κB pathways, which in turn further promote breast cancer cells to produce and secrete cytokines, forming an autocrine inflammatory forward-feedback loop to facilitate the enrichment of drug-resistant breast cancer cells and/or CSCs. Such an unexpected autocrine forward-feedback loop and CSC enrichment can be effectively blocked by inhibition of Wnt/β-catenin and NF-κB signaling. It can also be diminished by IL8-neutralizing antibody or blockade of IL8 receptors CXCR1/2 with reparixin. Administration of reparixin after chemotherapy withdrawal effectively attenuates tumor masses in a human xenograft model and abolishes paclitaxel-enriched CSCs in the secondary transplantation. These results are partially supported by the latest clinical data set. Breast cancer patients treated with chemotherapeutic drugs exhibited poor survival rate (66.7 vs 282.8 months, P=0.00071) and shorter disease-free survival time if their tumor samples expressed high level of IL8, CXCR1, CXCR2 genes and Wnt target genes. Taken together, this study provides new insights into the communication between autocrine niches and signaling pathways in the development of chemotherapy resistance and CSCs; it also offers a tangible approach in breast cancer treatment.
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30
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Botulinum hemagglutinin-mediated selective removal of cells deviating from the undifferentiated state in hiPSC colonies. Sci Rep 2017; 7:93. [PMID: 28273902 PMCID: PMC5428320 DOI: 10.1038/s41598-017-00083-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 01/31/2017] [Indexed: 01/05/2023] Open
Abstract
The undifferentiated state of human induced pluripotent stem cells (hiPSCs) depends on their cell–cell and cell–substrate adhesions. In this study, we report that exposure to botulinum hemagglutinin (HA), an E-cadherin function-blocking agent, selectively removed cells that deviated from the undifferentiated state in hiPSC colonies. After HA treatment, cell–cell adhesion was disrupted, deviated cells detached from colony centers, and dividing cells filled these spaces. Because E-cadherin-mediated adhesion was disrupted in undifferentiated cells, stress-fiber formation and focal adhesions were diminished; however, these were subsequently restored, and the cells retained expression of undifferentiated stem cell markers and their differentiation potential. In contrast, actin structures and focal adhesions were lost from deviated cells, and they subsequently died. In undifferentiated and deviated cells, the cadherin/integrin-regulator Rap1 was localized at cell–cell adhesions and in the cytoplasm, respectively. Concurrent HA and Rap1-inhibitor treatment accelerated the deviated-cell detachment and delayed the recovery of hiPSC morphology, but this effect was significantly attenuated by co-treatment with Rap1 activator. Thus, Rap1 regulated E-cadherin–integrin interplay in hiPSC colonies exhibiting deviation, while HA-mediated selective removal of these deviated cells helped maintain the undifferentiated state in the remaining hiPSCs.
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31
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Jia D, Tan Y, Liu H, Ooi S, Li L, Wright K, Bennett S, Addison CL, Wang L. Cardamonin reduces chemotherapy-enriched breast cancer stem-like cells in vitro and in vivo. Oncotarget 2016; 7:771-85. [PMID: 26506421 PMCID: PMC4808032 DOI: 10.18632/oncotarget.5819] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 10/06/2015] [Indexed: 12/26/2022] Open
Abstract
The failure of cytotoxic chemotherapy in breast cancers has been closely associated with the presence of drug resistant cancer stem cells (CSCs). Thus, screening for small molecules that selectively inhibit growth of CSCs may offer great promise for cancer control, particularly in combination with chemotherapy. In this report, we provide the first demonstration that cardamonin, a small molecule, selectively inhibits breast CSCs that have been enriched by chemotherapeutic drugs. In addition, cardamonin also sufficiently prevents the enrichment of CSCs when simultaneously used with chemotherapeutic drugs. Specifically, cardamonin effectively abolishes chemotherapeutic drug-induced up-regulation of IL-6, IL-8 and MCP-1 and activation of NF-κB/IKBα and Stat3. Furthermore, in a xenograft mouse model, co-administration of cardamonin and the chemotherapeutic drug doxorubicin significantly retards tumor growth and simultaneously decreases CSC pools in vivo. Since cardamonin has been found in some herbs, this work suggests a potential new approach for the effective treatment of breast CSCs by administration of cardamonin either concurrent with or after chemotherapeutic drugs.
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Affiliation(s)
- Deyong Jia
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Yuan Tan
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Huijuan Liu
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada.,Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Sarah Ooi
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Li Li
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Kathryn Wright
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Steffany Bennett
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
| | - Christina L Addison
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada.,Centre for Cancer Therapeutics, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada
| | - Lisheng Wang
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada.,Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario K1H 8L6, Canada.,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
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32
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Nakashima Y, Omasa T. What Kind of Signaling Maintains Pluripotency and Viability in Human-Induced Pluripotent Stem Cells Cultured on Laminin-511 with Serum-Free Medium? Biores Open Access 2016; 5:84-93. [PMID: 27096107 PMCID: PMC4834485 DOI: 10.1089/biores.2016.0001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Xeno-free medium contains no animal-derived components, but is composed of minimal growth factors and is serum free; the medium may be supplemented with insulin, transferrin, and selenium (ITS medium). Serum-free and xeno-free culture of human-induced pluripotent stem cells (hiPSCs) uses a variety of components based on ITS medium and Dulbecco's modified Eagle's medium/Ham's nutrient mixture F12 (DMEM/F12) that contain high levels of iron salt and glucose. Culture of hiPSCs also requires scaffolding materials, such as extracellular matrix, collagen, fibronectin, laminin, proteoglycan, and vitronectin. The scaffolding component laminin-511, which is composed of α5, β1, and γ1 chains, binds to α3β1, α6β1, and α6β4 integrins on the cell membrane to induce activation of the PI3K/AKT- and Ras/MAPK-dependent signaling pathways. In hiPSCs, the interaction of laminin-511/α6β1 integrin with the cell–cell adhesion molecule E-cadherin confers protection against apoptosis through the Ras homolog gene family member A (RhoA)/Rho kinase (ROCK) signaling pathway (the major pathways for cell death) and the proto-oncogene tyrosine-protein kinase Fyn (Fyn)-RhoA-ROCK signaling pathway. The expression levels of α6β1 integrin and E-cadherin on cell membranes are controlled through the activation of insulin receptor/insulin, FGF receptor/FGF2, or activin-like kinase 5 (ALK5)-dependent TGF-β signaling. A combination of growth factors, medium constituents, cell membrane-located E-cadherin, and α6β1 integrin-induced signaling is required for pluripotent cell proliferation and for optimal cell survival on a laminin-511 scaffold. In this review, we discuss and explore the influence of growth factors on the cadherin and integrin signaling pathways in serum-free and xeno-free cultures of hiPSCs during the preparation of products for regenerative medicinal therapies. In addition, we suggest the optimum serum-free medium components for use with laminin-511, a new scaffold for hiPSC culture.
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Affiliation(s)
- Yoshiki Nakashima
- Department of Material and Life Science, Graduate School of Engineering, Osaka University , Osaka, Japan
| | - Takeshi Omasa
- Department of Material and Life Science, Graduate School of Engineering, Osaka University , Osaka, Japan
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33
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Huang TS, Li L, Moalim-Nour L, Jia D, Bai J, Yao Z, Bennett SAL, Figeys D, Wang L. A Regulatory Network Involving β-Catenin, e-Cadherin, PI3k/Akt, and Slug Balances Self-Renewal and Differentiation of Human Pluripotent Stem Cells In Response to Wnt Signaling. Stem Cells 2016; 33:1419-33. [PMID: 25538040 PMCID: PMC5297972 DOI: 10.1002/stem.1944] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 11/28/2014] [Indexed: 12/12/2022]
Abstract
The mechanisms underlying disparate roles of the canonical Wnt signaling pathway in maintaining self‐renewal or inducing differentiation and lineage specification in embryonic stem cells (ESCs) are not clear. In this study, we provide the first demonstration that self‐renewal versus differentiation of human ESCs (hESCs) in response to Wnt signaling is predominantly determined by a two‐layer regulatory circuit involving β‐catenin, E‐cadherin, PI3K/Akt, and Slug in a time‐dependent manner. Short‐term upregulation of β‐catenin does not lead to the activation of T‐cell factor (TCF)‐eGFP Wnt reporter in hESCs. Instead, it enhances E‐cadherin expression on the cell membrane, thereby enhancing hESC self‐renewal through E‐cadherin‐associated PI3K/Akt signaling. Conversely, long‐term Wnt activation or loss of E‐cadherin intracellular β‐catenin binding domain induces TCF‐eGFP activity and promotes hESC differentiation through β‐catenin‐induced upregulation of Slug. Enhanced expression of Slug leads to a further reduction of E‐cadherin that serves as a β‐catenin “sink” sequestering free cytoplasmic β‐catenin. The formation of such a framework reinforces hESCs to switch from a state of temporal self‐renewal associated with short‐term Wnt/β‐catenin activation to definitive differentiation. Stem Cells2015;33:1419–1433
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Affiliation(s)
- Tyng-Shyan Huang
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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Zhang L, Xu Y, Xu J, Wei Y, Xu X. Protein kinase A inhibitor, H89, enhances survival and clonogenicity of dissociated human embryonic stem cells through Rho-associated coiled-coil containing protein kinase (ROCK) inhibition. Hum Reprod 2016; 31:832-43. [PMID: 26848187 DOI: 10.1093/humrep/dew011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 01/12/2016] [Indexed: 12/27/2022] Open
Abstract
STUDY QUESTION Can cell survival of dissociated human embryonic stem cells (hESCs) be increased during culture? SUMMARY ANSWER A protein kinase A (PKA) inhibitor, H89, can significantly enhance survival and clonogenicity of dissociated hESCs without affecting their pluripotency. WHAT IS KNOWN ALREADY hESCs are vulnerable to massive cell death upon cellular detachment and dissociation. STUDY DESIGN, SIZE, DURATION hESCs were dissociated into single cells and then cultured in feeder-dependent and -independent manners. H89 was added to the culture medium at different concentrations for 1 day. The statistical results were obtained from at least three independent experiments (n ≥ 4). The group without treatment was used as the negative control. PARTICIPANTS/MATERIALS, SETTING, METHODS 4 µM H89 was added in the culture medium to promote cell survival and colony formation of dissociated hESCs. MTT method and propidium iodide (PI) staining were used to determine cell proliferation, cell death and cell cycle, respectively. To count colony formation, alkaline phosphatase (AP) staining was carried out. Western blot was performed to determine protein expression. Except AP staining, immunofluorescence, RT-PCR and karyotype analysis were used to confirm the pluripotent state of H89 treated hESCs. MAIN RESULTS AND THE ROLE OF CHANCE H89 inhibits the dissociation-induced phosphorylation of PKA and two substrates of Rho-associated coiled-coil containing protein kinase (ROCK), myosin light chain (MLC2) and myosin phosphatase target subunit 1 (MYPT1), significantly increases cell survival and colony formation, and strongly depresses dissociation-induced cell death and cell blebbing without affecting the pluripotency of hESCs and their differentiation in vitro. LIMITATIONS, REASONS FOR CAUTION Appropriate H89 concentration should be used and 1 day of H89 treatment is sufficient for promoting survival and colony formation of dissociated hESCs. WIDER IMPLICATIONS OF THE FINDINGS These results provide an alternative for human pluripotent stem cell (hPSC) culture, broaden the scope of participants in the cell death of single hES cells after dissociation and further enlighten clues to understand the mechanism of dissociation-induced cell death. STUDY FUNDING/COMPETING INTERESTS This research was supported by the National Natural Science Foundation of China (21176238, 21576266), and Chinese Academy of Sciences. There is no conflict of interest to declare. TRIAL REGISTRATION NUMBER Nil.
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Affiliation(s)
- Liang Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Yanqing Xu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Jiandong Xu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Yuping Wei
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Xia Xu
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
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Teichroeb JH, Kim J, Betts DH. The role of telomeres and telomerase reverse transcriptase isoforms in pluripotency induction and maintenance. RNA Biol 2016; 13:707-19. [PMID: 26786236 DOI: 10.1080/15476286.2015.1134413] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Telomeres are linear guanine-rich DNA structures at the ends of chromosomes. The length of telomeric DNA is actively regulated by a number of mechanisms in highly proliferative cells such as germ cells, cancer cells, and pluripotent stem cells. Telomeric DNA is synthesized by way of the ribonucleoprotein called telomerase containing a reverse transcriptase (TERT) subunit and RNA component (TERC). TERT is highly conserved across species and ubiquitously present in their respective pluripotent cells. Recent studies have uncovered intricate associations between telomeres and the self-renewal and differentiation properties of pluripotent stem cells. Interestingly, the past decade's work indicates that the TERT subunit also has the capacity to modulate mitochondrial function, to remodel chromatin structure, and to participate in key signaling pathways such as the Wnt/β-catenin pathway. Many of these non-canonical functions do not require TERT's catalytic activity, which hints at possible functions for the extensive number of alternatively spliced TERT isoforms that are highly expressed in pluripotent stem cells. In this review, some of the established and potential routes of pluripotency induction and maintenance are highlighted from the perspectives of telomere maintenance, known TERT isoform functions and their complex regulation.
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Affiliation(s)
- Jonathan H Teichroeb
- a Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry , The University of Western Ontario , London , Ontario , Canada
| | - Joohwan Kim
- a Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry , The University of Western Ontario , London , Ontario , Canada
| | - Dean H Betts
- a Department of Physiology and Pharmacology, Schulich School of Medicine & Dentistry , The University of Western Ontario , London , Ontario , Canada.,b Children's Health Research Institute, Lawson Health Research Institute , London , Ontario , Canada
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Sohail M, Zhang M, Litchfield D, Wang L, Kung S, Xie J. Differential expression, distinct localization and opposite effect on Golgi structure and cell differentiation by a novel splice variant of human PRMT5. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:2444-52. [PMID: 26151339 DOI: 10.1016/j.bbamcr.2015.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 06/20/2015] [Accepted: 07/03/2015] [Indexed: 01/20/2023]
Abstract
Alternative splicing contributes greatly to the proteomic diversity of metazoans. Protein arginine methyltransferase 5 (PRMT5) methylates arginines of Golgi components and other factors exerting diverse effects on cell growth/differentiation, but the underlying molecular basis for its subcellular distribution and diverse roles has not been fully understood. Here we show the detailed properties of an evolutionarily emerged splice variant of human PRMT5 (PRMT5S) that is distinct from the original isoform (PRMT5L). The isoforms are differentially expressed among mammalian cells and tissues. The PRMT5S is distributed all over the cell but PRMT5L mainly colocalizes with Giantin, a Golgi marker. PRMT5 knockdown led to an enlarged Giantin pattern, which was prevented by the expression of either isoform. Rescuing PRMT5S also increased the percentage of cells with an interphase Giantin pattern compacted at one end of the nucleus, consistent with its cell cycle-arresting effect, while rescuing PRMT5L increased that of the mitotic Giantin patterns of dynamically fragmented structures. Moreover, the isoforms are differentially expressed during neuronal or dendritic cell differentiation, and their ectopic expression showed an opposite effect on dendritic cell differentiation. Furthermore, besides their differential regulation of gene expression, both isoforms also similarly regulate over a thousand genes particularly those involved in apoptosis and differentiation. Taking these properties together, we propose that their differential expression and subcellular localization contribute to spatial and temporal regulation of arginine methylation and gene expression to exert different effects. The novel PRMT5S likely contributes to the observed diverse effects of PRMT5 in cells.
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Affiliation(s)
- Muhammad Sohail
- Department of Physiology & Pathophysiology, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Manli Zhang
- Department of Immunology, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - David Litchfield
- Department of Biochemistry, University of Western Ontario, London, Ontario, Canada
| | - Lisheng Wang
- Department of Biochemistry, Microbiology, and Immunology, University of Ottawa, Canada
| | - Sam Kung
- Department of Immunology, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Jiuyong Xie
- Department of Physiology & Pathophysiology, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada; Department of Biochemistry & Medical Genetics, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada.
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Kim MH, Kino-oka M. Maintenance of an undifferentiated state of human induced pluripotent stem cells through migration-dependent regulation of the balance between cell–cell and cell–substrate interactions. J Biosci Bioeng 2015; 119:617-22. [DOI: 10.1016/j.jbiosc.2014.10.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/23/2014] [Accepted: 10/24/2014] [Indexed: 12/15/2022]
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Kim WT, Seo Choi H, Min Lee H, Jang YJ, Ryu CJ. B-cell receptor-associated protein 31 regulates human embryonic stem cell adhesion, stemness, and survival via control of epithelial cell adhesion molecule. Stem Cells 2015; 32:2626-41. [PMID: 24898727 DOI: 10.1002/stem.1765] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 05/08/2014] [Accepted: 05/15/2014] [Indexed: 02/01/2023]
Abstract
B-Cell receptor-associated protein 31 (BAP31) regulates the export of secreted membrane proteins from the endoplasmic reticulum (ER) to the downstream secretory pathway. Previously, we generated a monoclonal antibody 297-D4 against the surface molecule on undifferentiated human embryonic stem cells (hESCs). Here, we found that 297-D4 antigen was localized to pluripotent hESCs and downregulated during early differentiation of hESCs and identified that the antigen target of 297-D4 was BAP31 on the hESC-surface. To investigate the functional role of BAP31 in hESCs, BAP31 expression was knocked down by small interfering RNA. BAP31 depletion impaired hESC self-renewal and pluripotency and drove hESC differentiation into multicell lineages. BAP31 depletion hindered hESC proliferation by arresting cell cycle at G0/G1 phase and inducing caspase-independent cell death. Interestingly, BAP31 depletion reduced hESC adhesion to extracellular matrix (ECM). Analysis of cell surface molecules showed decreased expression of epithelial cell adhesion molecule (EpCAM) in BAP31-depleted hESCs, while ectopic expression of BAP31 elevated the expression of EpCAM. EpCAM depletion also reduced hESC adhesion to ECM, arrested cell cycle at G0/G1 phase and induced cell death, producing similar effects to those of BAP31 depletion. BAP31 and EpCAM were physically associated and colocalized at the ER and cell surface. Both BAP31 and EpCAM depletion decreased cyclin D1 and E expression and suppressed PI3K/Akt signaling, suggesting that BAP31 regulates hESC stemness and survival via control of EpCAM expression. These findings provide, for the first time, mechanistic insights into how BAP31 regulates hESC stemness and survival via control of EpCAM expression.
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Affiliation(s)
- Won-Tae Kim
- Department of Bioscience and Biotechnology, Institute of Bioscience, Sejong University, Seoul, Korea
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Desai N, Rambhia P, Gishto A. Human embryonic stem cell cultivation: historical perspective and evolution of xeno-free culture systems. Reprod Biol Endocrinol 2015; 13:9. [PMID: 25890180 PMCID: PMC4351689 DOI: 10.1186/s12958-015-0005-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 02/09/2015] [Indexed: 01/23/2023] Open
Abstract
Human embryonic stem cells (hESC) have emerged as attractive candidates for cell-based therapies that are capable of restoring lost cell and tissue function. These unique cells are able to self-renew indefinitely and have the capacity to differentiate in to all three germ layers (ectoderm, endoderm and mesoderm). Harnessing the power of these pluripotent stem cells could potentially offer new therapeutic treatment options for a variety of medical conditions. Since the initial derivation of hESC lines in 1998, tremendous headway has been made in better understanding stem cell biology and culture requirements for maintenance of pluripotency. The approval of the first clinical trials of hESC cells for treatment of spinal cord injury and macular degeneration in 2010 marked the beginning of a new era in regenerative medicine. Yet it was clearly recognized that the clinical utility of hESC transplantation was still limited by several challenges. One of the most immediate issues has been the exposure of stem cells to animal pathogens, during hESC derivation and during in vitro propagation. Initial culture protocols used co-culture with inactivated mouse fibroblast feeder (MEF) or human feeder layers with fetal bovine serum or alternatively serum replacement proteins to support stem cell proliferation. Most hESC lines currently in use have been exposed to animal products, thus carrying the risk of xeno-transmitted infections and immune reaction. This mini review provides a historic perspective on human embryonic stem cell culture and the evolution of new culture models. We highlight the challenges and advances being made towards the development of xeno-free culture systems suitable for therapeutic applications.
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Affiliation(s)
- Nina Desai
- Department of Obstetrics and Gynecology, Cleveland Clinic, Beachwood, OH, USA.
| | - Pooja Rambhia
- Department of Obstetrics and Gynecology, Cleveland Clinic, Beachwood, OH, USA.
| | - Arsela Gishto
- Department of Obstetrics and Gynecology, Cleveland Clinic, Beachwood, OH, USA.
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Abstract
The arrival of multicellularity in evolution facilitated cell-cell signaling in conjunction with adhesion. As the ectodomains of cadherins interact with each other directly in trans (as well as in cis), spanning the plasma membrane and associating with multiple other entities, cadherins enable the transduction of "outside-in" or "inside-out" signals. We focus this review on signals that originate from the larger family of cadherins that are inwardly directed to the nucleus, and thus have roles in gene control or nuclear structure-function. The nature of cadherin complexes varies considerably depending on the type of cadherin and its context, and we will address some of these variables for classical cadherins versus other family members. Substantial but still fragmentary progress has been made in understanding the signaling mediators used by varied cadherin complexes to coordinate the state of cell-cell adhesion with gene expression. Evidence that cadherin intracellular binding partners also localize to the nucleus is a major point of interest. In some models, catenins show reduced binding to cadherin cytoplasmic tails favoring their engagement in gene control. When bound, cadherins may serve as stoichiometric competitors of nuclear signals. Cadherins also directly or indirectly affect numerous signaling pathways (e.g., Wnt, receptor tyrosine kinase, Hippo, NFκB, and JAK/STAT), enabling cell-cell contacts to touch upon multiple biological outcomes in embryonic development and tissue homeostasis.
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Affiliation(s)
- Pierre D McCrea
- Department of Genetics, University of Texas MD Anderson Cancer Center; Program in Genes & Development, Graduate School in Biomedical Sciences, Houston, Texas, USA.
| | - Meghan T Maher
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Cara J Gottardi
- Cellular and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA; Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
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Fritz AL, Adil MM, Mao SR, Schaffer DV. cAMP and EPAC Signaling Functionally Replace OCT4 During Induced Pluripotent Stem Cell Reprogramming. Mol Ther 2015; 23:952-963. [PMID: 25666918 DOI: 10.1038/mt.2015.28] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 02/03/2015] [Indexed: 12/17/2022] Open
Abstract
The advent of induced pluripotent stem cells--generated via the ectopic overexpression of reprogramming factors such as OCT4, SOX2, KLF4, and C-MYC (OSKM) in a differentiated cell type--has enabled groundbreaking research efforts in regenerative medicine, disease modeling, and drug discovery. Although initial studies have focused on the roles of nuclear factors, increasing evidence highlights the importance of signal transduction during reprogramming. By utilizing a quantitative, medium-throughput screen to initially identify signaling pathways that could potentially replace individual transcription factors during reprogramming, we initially found that several pathways--such as Notch, Smoothened, and cyclic AMP (cAMP) signaling--were capable of generating alkaline phosphatase positive colonies in the absence of OCT4, the most stringently required Yamanaka factor. After further investigation, we discovered that cAMP signal activation could functionally replace OCT4 to induce pluripotency, and results indicate that the downstream exchange protein directly activated by cAMP (EPAC) signaling pathway rather than protein kinase A (PKA) signaling is necessary and sufficient for this function. cAMP signaling may reduce barriers to reprogramming by contributing to downstream epithelial gene expression, decreasing mesenchymal gene expression, and increasing proliferation. Ultimately, these results elucidate mechanisms that could lead to new reprogramming methodologies and advance our understanding of stem cell biology.
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Affiliation(s)
- Ashley L Fritz
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California, USA
| | - Maroof M Adil
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California, USA
| | - Sunnie R Mao
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California, USA
| | - David V Schaffer
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California, USA; Department of Bioengineering, University of California, Berkeley, California, USA; Helen Wills Neuroscience Institute, University of California, Berkeley, California, USA.
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Gomez GA, McLachlan RW, Wu SK, Caldwell BJ, Moussa E, Verma S, Bastiani M, Priya R, Parton RG, Gaus K, Sap J, Yap AS. An RPTPα/Src family kinase/Rap1 signaling module recruits myosin IIB to support contractile tension at apical E-cadherin junctions. Mol Biol Cell 2015; 26:1249-62. [PMID: 25631816 PMCID: PMC4454173 DOI: 10.1091/mbc.e14-07-1223] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Cell-cell adhesion couples the contractile cortices of epithelial cells together, generating tension to support a range of morphogenetic processes. E-cadherin adhesion plays an active role in generating junctional tension by promoting actin assembly and cortical signaling pathways that regulate myosin II. Multiple myosin II paralogues accumulate at mammalian epithelial cell-cell junctions. Earlier, we found that myosin IIA responds to Rho-ROCK signaling to support junctional tension in MCF-7 cells. Although myosin IIB is also found at the zonula adherens (ZA) in these cells, its role in junctional contractility and its mode of regulation are less well understood. We now demonstrate that myosin IIB contributes to tension at the epithelial ZA. Further, we identify a receptor type-protein tyrosine phosphatase alpha-Src family kinase-Rap1 pathway as responsible for recruiting myosin IIB to the ZA and supporting contractile tension. Overall these findings reinforce the concept that orthogonal E-cadherin-based signaling pathways recruit distinct myosin II paralogues to generate the contractile apparatus at apical epithelial junctions.
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Affiliation(s)
- Guillermo A Gomez
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Robert W McLachlan
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Selwin K Wu
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Benjamin J Caldwell
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Elliott Moussa
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Suzie Verma
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Michele Bastiani
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Rashmi Priya
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Robert G Parton
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Katharina Gaus
- UNSW Australia, ARC Centre of Excellence in Advanced Molecular Imaging and Australian Centre for Nanomedicine, Sydney 2052, Australia
| | - Jan Sap
- Université Paris Diderot, Sorbonne Paris Cité, Epigenetics and Cell Fate, UMR 7216 CNRS Bâtiment Lamarck, F-75205 Paris Cedex 13, France
| | - Alpha S Yap
- Division of Cell Biology and Molecular Medicine, Institute for Molecular Bioscience, University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
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Choi HS, Lee HM, Jang YJ, Kim CH, Ryu CJ. Heterogeneous nuclear ribonucleoprotein A2/B1 regulates the self-renewal and pluripotency of human embryonic stem cells via the control of the G1/S transition. Stem Cells 2015; 31:2647-58. [PMID: 23495120 DOI: 10.1002/stem.1366] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 02/15/2013] [Indexed: 01/15/2023]
Abstract
Self-renewal and pluripotency of human embryonic stem cells (hESCs) are a complex biological process for maintaining hESC stemness. However, the molecular mechanisms underlying these special properties of hESCs are not fully understood. Heterogeneous nuclear ribonucleoprotein A2/B1 (hnRNP A2/B1) is a multifunctional RNA-binding protein whose expression is related to cell proliferation and carcinogenesis. In this study, we found that hnRNP A2/B1 expression was localized to undifferentiated hESCs and decreased upon differentiation of hESCs. hnRNP A2/B1 knockdown reduced the number of alkaline phosphatase-positive colonies in hESCs and led to a decrease in the expression of pluripotency-associated transcription factors OCT4, NANOG, and SOX2, indicating that hnRNP A2/B1 is essential for hESC self-renewal and pluripotency. hnRNP A2/B1 knockdown increased the expression of gene markers associated with the early development of three germ layers, and promoted the process of epithelial-mesenchymal transition, suggesting that hnRNP A2/B1 is required for maintaining the undifferentiated and epithelial phenotypes of hESCs. hnRNP A2/B1 knockdown inhibited hESC proliferation and induced cell cycle arrest in the G0/G1 phase before differentiation via degradation of cyclin D1, cyclin E, and Cdc25A. hnRNP A2/B1 knockdown increased p27 expression and induced phosphorylation of p53 and Chk1, suggesting that hnRNP A2/B1 also regulates the G1/S transition of hESC cell cycle through the control of p27 expression and p53 and Chk1 activity. Analysis of signaling molecules further revealed that hnRNP A2/B1 regulated hESC proliferation in a PI3K/Akt-dependent manner. These findings provide for the first time mechanistic insights into how hnRNP A2/B1 regulates hESC self-renewal and pluripotency.
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Affiliation(s)
- Hong Seo Choi
- Department of Bioscience and Biotechnology, Institute of Bioscience, Sejong University, Seoul, Korea
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Liu KC, Yo YT, Huang RL, Wang YC, Liao YP, Huang TS, Chao TK, Lin CK, Weng SJ, Ma KH, Chang CC, Yu MH, Lai HC. Ovarian cancer stem-like cells show induced translineage-differentiation capacity and are suppressed by alkaline phosphatase inhibitor. Oncotarget 2014; 4:2366-82. [PMID: 24280306 PMCID: PMC3926833 DOI: 10.18632/oncotarget.1424] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Spheroid formation is one property of stem cells—such as embryo-derived or neural stem cells—that has been used for the enrichment of cancer stem-like cells (CSLCs). However, it is unclear whether CSLC-derived spheroids are heterogeneous or whether they share common embryonic stemness properties. Understanding these features might lead to novel therapeutic approaches. Ovarian carcinoma is a deadly disease of women. We identified two types of spheroids (SR1 and SR2) from ovarian cancer cell lines and patients' specimens according to their morphology. Both types expressed stemness markers and could self-renew and initiate tumors when a low number of cells were used. Only SR1 could differentiate into multiple-lineage cell types under specific induction conditions. SR1 spheroids could differentiate to SR2 spheroids through epithelial–mesenchymal transition. Alkaline phosphatase (ALP) was highly expressed in SR1 spheroids, decreased in SR2 spheroids, and was absent in differentiated progenies in accordance with the loss of stemness properties. We verified that ALP can be a marker for ovarian CSLCs, and patients with greater ALP expression is related to advanced clinical stages and have a higher risk of recurrence and lower survival rate. The ALP inhibitor, levamisole, disrupted the self-renewal of ovarian CSLCs in vitro and tumor growth in vivo. In summary, this research provides a plastic ovarian cancer stem cell model and a new understanding of the cross-link between stem cells and cancers. This results show that ovarian CSLCs can be suppressed by levamisole. Our findings demonstrated that some ovarian CSLCs may restore ALP activity, and this suggests that inhibition of ALP activity may present a new opportunity for treatment of ovarian cancer.
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Affiliation(s)
- Kuei-Chun Liu
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
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Jia D, Yang W, Li L, Liu H, Tan Y, Ooi S, Chi L, Filion LG, Figeys D, Wang L. β-Catenin and NF-κB co-activation triggered by TLR3 stimulation facilitates stem cell-like phenotypes in breast cancer. Cell Death Differ 2014; 22:298-310. [PMID: 25257174 PMCID: PMC4291491 DOI: 10.1038/cdd.2014.145] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 06/26/2014] [Accepted: 08/04/2014] [Indexed: 12/26/2022] Open
Abstract
Cancer stem cells (CSCs) are responsible for tumor initiation and progression. Toll-like receptors (TLRs) are highly expressed in cancer cells and associated with poor prognosis. However, a linkage between CSCs and TLRs is unclear, and potential intervention strategies to prevent TLR stimulation-induced CSC formation and underlying mechanisms are lacking. Here, we demonstrate that stimulation of toll-like receptor 3 (TLR3) promotes breast cancer cells toward a CSC phenotype in vitro and in vivo. Importantly, conventional NF-κB signaling pathway is not exclusively responsible for TLR3 activation-enriched CSCs. Intriguingly, simultaneous activation of both β-catenin and NF-κB signaling pathways, but neither alone, is required for the enhanced CSC phenotypes. We have further identified a small molecule cardamonin that can concurrently inhibit β-catenin and NF-κB signals. Cardamonin is capable of effectively abolishing TLR3 activation-enhanced CSC phenotypes in vitro and successfully controlling TLR3 stimulation-induced tumor growth in human breast cancer xenografts. These findings may provide a foundation for developing new strategies to prevent the induction of CSCs during cancer therapies.
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Affiliation(s)
- D Jia
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5
| | - W Yang
- 1] Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5 [2] Life Science College of Northwest A&F University, Yangling, Shaanxi 712100, China
| | - L Li
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5
| | - H Liu
- 1] Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5 [2] Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Bio-X Institutes, Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Y Tan
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5
| | - S Ooi
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5
| | - L Chi
- Department of Neurosurgery, Qilu Hospital of Shandong University, Jinan, Shandong 250012, China
| | - L G Filion
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5
| | - D Figeys
- 1] Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5 [2] Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada [3] Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Ontario, Canada
| | - L Wang
- 1] Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, Canada K1H8M5 [2] Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada [3] Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Ontario, Canada
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Gao H, Wu X, Simon L, Fossett N. Antioxidants maintain E-cadherin levels to limit Drosophila prohemocyte differentiation. PLoS One 2014; 9:e107768. [PMID: 25226030 PMCID: PMC4167200 DOI: 10.1371/journal.pone.0107768] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 08/12/2014] [Indexed: 01/01/2023] Open
Abstract
Mitochondrial reactive oxygen species (ROS) regulate a variety of biological processes by networking with signal transduction pathways to maintain homeostasis and support adaptation to stress. In this capacity, ROS have been shown to promote the differentiation of progenitor cells, including mammalian embryonic and hematopoietic stem cells and Drosophila hematopoietic progenitors (prohemocytes). However, many questions remain about how ROS alter the regulatory machinery to promote progenitor differentiation. Here, we provide evidence for the hypothesis that ROS reduce E-cadherin levels to promote Drosophila prohemocyte differentiation. Specifically, we show that knockdown of the antioxidants, Superoxide dismutatase 2 and Catalase reduce E-cadherin protein levels prior to the loss of Odd-skipped-expressing prohemocytes. Additionally, over-expression of E-cadherin limits prohemocyte differentiation resulting from paraquat-induced oxidative stress. Furthermore, two established targets of ROS, Enhancer of Polycomb and FOS, control the level of E-cadherin protein expression. Finally, we show that knockdown of either Superoxide dismutatase 2 or Catalase leads to an increase in the E-cadherin repressor, Serpent. As a result, antioxidants and targets of ROS can control E-cadherin protein levels, and over-expression of E-cadherin can ameliorate the prohemocyte response to oxidative stress. Collectively, these data strongly suggest that ROS promote differentiation by reducing E-cadherin levels. In mammalian systems, ROS promote embryonic stem cell differentiation, whereas E-cadherin blocks differentiation. However, it is not known if elevated ROS reduce E-cadherin to promote embryonic stem cell differentiation. Thus, our findings may have identified an important mechanism by which ROS promote stem/progenitor cell differentiation.
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Affiliation(s)
- Hongjuan Gao
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States of America
| | - Xiaorong Wu
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States of America
| | - LaTonya Simon
- Department of Chemical and Biochemical Engineering, University of Maryland Baltimore County, Baltimore, MD, United States of America
| | - Nancy Fossett
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, MD, United States of America
- * E-mail:
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Todorovic V, Koetsier JL, Godsel LM, Green KJ. Plakophilin 3 mediates Rap1-dependent desmosome assembly and adherens junction maturation. Mol Biol Cell 2014; 25:3749-64. [PMID: 25208567 PMCID: PMC4230782 DOI: 10.1091/mbc.e14-05-0968] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Desmosomal Armadillo family member Pkp3 is established as a coordinator of desmosome and adherens junction assembly and maturation through its physical and functional association with Rap1. It thus functions in a manner distinct from the closely related Pkp2. The pathways driving desmosome and adherens junction assembly are temporally and spatially coordinated, but how they are functionally coupled is poorly understood. Here we show that the Armadillo protein plakophilin 3 (Pkp3) mediates both desmosome assembly and E-cadherin maturation through Rap1 GTPase, thus functioning in a manner distinct from the closely related plakophilin 2 (Pkp2). Whereas Pkp2 and Pkp3 share the ability to mediate the initial phase of desmoplakin (DP) accumulation at sites of cell–cell contact, they play distinct roles in later steps: Pkp3 is required for assembly of a cytoplasmic population of DP-enriched junction precursors, whereas Pkp2 is required for transfer of the precursors to the membrane. Moreover, Pkp3 forms a complex with Rap1 GTPase, promoting its activation and facilitating desmosome assembly. We show further that Pkp3 deficiency causes disruption of an E-cadherin/Rap1 complex required for adherens junction sealing. These findings reveal Pkp3 as a coordinator of desmosome and adherens junction assembly and maturation through its functional association with Rap1.
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Affiliation(s)
- Viktor Todorovic
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Jennifer L Koetsier
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Lisa M Godsel
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611 Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Kathleen J Green
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611 Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611 R.H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
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48
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Pieters T, van Roy F. Role of cell–cell adhesion complexes in embryonic stem cell biology. J Cell Sci 2014; 127:2603-13. [DOI: 10.1242/jcs.146720] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
ABSTRACT
Pluripotent embryonic stem cells (ESCs) can self-renew or differentiate into any cell type within an organism. Here, we focus on the roles of cadherins and catenins – their cytoplasmic scaffold proteins – in the fate, maintenance and differentiation of mammalian ESCs. E-cadherin is a master stem cell regulator that is required for both mouse ESC (mESC) maintenance and differentiation. E-cadherin interacts with key components of the naive stemness pathway and ablating it prevents stem cells from forming well-differentiated teratomas or contributing to chimeric animals. In addition, depleting E-cadherin converts naive mouse ESCs into primed epiblast-like stem cells (EpiSCs). In line with this, a mesenchymal-to-epithelial transition (MET) occurs during reprogramming of somatic cells towards induced pluripotent stem cells (iPSCs), leading to downregulation of N-cadherin and acquisition of high E-cadherin levels. β-catenin exerts a dual function; it acts in cadherin-based adhesion and in WNT signaling and, although WNT signaling is important for stemness, the adhesive function of β-catenin might be crucial for maintaining the naive state of stem cells. In addition, evidence is rising that other junctional proteins are also important in ESC biology. Thus, precisely regulated levels and activities of several junctional proteins, in particular E-cadherin, safeguard naive pluripotency and are a prerequisite for complete somatic cell reprogramming.
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Affiliation(s)
- Tim Pieters
- Department of Biomedical Molecular Biology, Ghent University, B-9052 Ghent, Belgium
- Molecular and Cellular Oncology Unit, Inflammation Research Center, VIB, B-9052 Ghent, Belgium
| | - Frans van Roy
- Department of Biomedical Molecular Biology, Ghent University, B-9052 Ghent, Belgium
- Molecular Cell Biology Unit, Inflammation Research Center, VIB, B-9052 Ghent, Belgium
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The WNT receptor FZD7 is required for maintenance of the pluripotent state in human embryonic stem cells. Proc Natl Acad Sci U S A 2014; 111:1409-14. [PMID: 24474766 DOI: 10.1073/pnas.1323697111] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
WNT signaling is involved in maintaining stem cells in an undifferentiated state; however, it is often unclear which WNTs and WNT receptors are mediating these activities. Here we examined the role of the WNT receptor FZD7 in maintaining human embryonic stem cells (hESCs) in an undifferentiated and pluripotent state. FZD7 expression is significantly elevated in undifferentiated cells relative to differentiated cell populations, and interfering with its expression or function, either by short hairpin RNA-mediated knockdown or with a fragment antigen binding (Fab) molecule directed against FZD7, disrupts the pluripotent state of hESCs. The FZD7-specific Fab blocks signaling by Wnt3a protein by down-regulating FZD7 protein levels, suggesting that FZD7 transduces Wnt signals to activate Wnt/β-catenin signaling. These results demonstrate that FZD7 encodes a regulator of the pluripotent state and that hESCs require endogenous WNT/β-catenin signaling through FZD7 to maintain an undifferentiated phenotype.
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50
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Gao H, Wu X, Fossett N. Drosophila E-cadherin functions in hematopoietic progenitors to maintain multipotency and block differentiation. PLoS One 2013; 8:e74684. [PMID: 24040319 PMCID: PMC3764055 DOI: 10.1371/journal.pone.0074684] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 08/07/2013] [Indexed: 01/12/2023] Open
Abstract
A fundamental question in stem cell biology concerns the regulatory strategies that control the choice between multipotency and differentiation. Drosophila blood progenitors or prohemocytes exhibit key stem cell characteristics, including multipotency, quiescence, and niche dependence. As a result, studies of Drosophila hematopoiesis have provided important insights into the molecular mechanisms that control these processes. Here, we show that E-cadherin is an important regulator of prohemocyte fate choice, maintaining prohemocyte multipotency and blocking differentiation. These functions are reminiscent of the role of E-cadherin in mammalian embryonic stem cells. We also show that mis-expression of E-cadherin in differentiating hemocytes disrupts the boundary between these cells and undifferentiated prohemocytes. Additionally, upregulation of E-cadherin in differentiating hemocytes increases the number of intermediate cell types expressing the prohemocyte marker, Patched. Furthermore, our studies indicate that the Drosophila GATA transcriptional co-factor, U-shaped, is required for E-cadherin expression. Consequently, E-cadherin is a downstream target of U-shaped in the maintenance of prohemocyte multipotency. In contrast, we showed that forced expression of the U-shaped GATA-binding partner, Serpent, repressed E-cadherin expression and promoted lamellocyte differentiation. Thus, U-shaped may maintain E-cadherin expression by blocking the inhibitory activity of Serpent. Collectively, these observations suggest that GATA:FOG complex formation regulates E-cadherin levels and, thereby, the choice between multipotency and differentiation. The work presented in this report further defines the molecular basis of prohemocyte cell fate choice, which will provide important insights into the mechanisms that govern stem cell biology.
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Affiliation(s)
- Hongjuan Gao
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Xiaorong Wu
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
| | - Nancy Fossett
- Center for Vascular and Inflammatory Diseases and the Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, United States of America
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