1
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Zheng S, Wang X, Matskova L, Zhou X, Zhang Z, Kashuba E, Ernberg I, Aspenström P. MTSS1 is downregulated in nasopharyngeal carcinoma (NPC) which disrupts adherens junctions leading to enhanced cell migration and invasion. Front Cell Dev Biol 2023; 11:1275668. [PMID: 37920825 PMCID: PMC10618355 DOI: 10.3389/fcell.2023.1275668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 10/03/2023] [Indexed: 11/04/2023] Open
Abstract
Loss of cell-cell adhesions is the indispensable first step for cancer cells to depart from the primary tumor mass to metastasize. Metastasis suppressor 1 (MTSS1) is frequently lost in metastatic tissues, correlating to advanced tumor stages and poor prognosis across a variety of cancers. Here we explore the anti-metastatic mechanisms of MTSS1, which have not been well understood. We found that MTSS1 is downregulated in NPC tissues. Lower levels of MTSS1 expression correlate to worse prognosis. We show that MTSS1 suppresses NPC cell migration and invasion in vitro through cytoskeletal remodeling at cell-cell borders and assembly of E-cadherin/β-catenin/F-actin in adherens junctions. The I-BAR domain of MTSS1 was both necessary and sufficient to restore this formation of E-cadherin/β-catenin/F-actin-mediated cell adherens junctions.
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Affiliation(s)
- Shixing Zheng
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
- ENT Institute and Department of Otorhinolaryngology, Eye & ENT Hospital, Fudan University, Shanghai, China
| | - Xiaoxia Wang
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Liudmila Matskova
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Xiaoying Zhou
- Scientific Research Centre, Life Science Institute, Guangxi Medical University, Nanning, China
| | - Zhe Zhang
- Department of Otolaryngology-Head and Neck Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Elena Kashuba
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
- RE Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology of National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Ingemar Ernberg
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Pontus Aspenström
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
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2
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Eslami M, Khazeni S, Khanaghah XM, Asadi MH, Ansari MA, Garjan JH, Lotfalizadeh MH, Bayat M, Taghizadieh M, Taghavi SP, Hamblin MR, Nahand JS. MiRNA-related metastasis in oral cancer: moving and shaking. Cancer Cell Int 2023; 23:182. [PMID: 37635248 PMCID: PMC10463971 DOI: 10.1186/s12935-023-03022-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 08/06/2023] [Indexed: 08/29/2023] Open
Abstract
Across the world, oral cancer is a prevalent tumor. Over the years, both its mortality and incidence have grown. Oral cancer metastasis is a complex process involving cell invasion, migration, proliferation, and egress from cancer tissue either by lymphatic vessels or blood vessels. MicroRNAs (miRNAs) are essential short non-coding RNAs, which can act either as tumor suppressors or as oncogenes to control cancer development. Cancer metastasis is a multi-step process, in which miRNAs can inhibit or stimulate metastasis at all stages, including epithelial-mesenchymal transition, migration, invasion, and colonization, by targeting critical genes in these pathways. On the other hand, long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs), two different types of non-coding RNAs, can regulate cancer metastasis by affecting gene expression through cross-talk with miRNAs. We reviewed the scientific literature (Google Scholar, Scopus, and PubMed) for the period 2000-2023 to find reports concerning miRNAs and lncRNA/circRNA-miRNA-mRNA networks, which control the spread of oral cancer cells by affecting invasion, migration, and metastasis. According to these reports, miRNAs are involved in the regulation of metastasis pathways either by directly or indirectly targeting genes associated with metastasis. Moreover, circRNAs and lncRNAs can induce or suppress oral cancer metastasis by acting as competing endogenous RNAs to inhibit the effect of miRNA suppression on specific mRNAs. Overall, non-coding RNAs (especially miRNAs) could help to create innovative therapeutic methods for the control of oral cancer metastases.
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Affiliation(s)
- Meghdad Eslami
- Department of oral and maxillofacial surgery, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saba Khazeni
- Department of oral and maxillofacial surgery, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Xaniar Mohammadi Khanaghah
- Department of oral and maxillofacial surgery, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Hossein Asadi
- Department of oral and maxillofacial surgery, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohamad Amin Ansari
- Department of oral and maxillofacial surgery, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Javad Hayati Garjan
- Department of oral and maxillofacial surgery, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Mobina Bayat
- Department of Plant, Cell and Molecular Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Taghizadieh
- Department of Pathology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Seyed Pouya Taghavi
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
- Department of Virology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Michael R Hamblin
- Laser Research Centre, Faculty of Health Science, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Javid Sadri Nahand
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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3
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Qian Z, Song D, Ipsaro JJ, Bautista C, Joshua-Tor L, Yeh JTH, Tonks NK. Manipulating PTPRD function with ectodomain antibodies. Genes Dev 2023; 37:743-759. [PMID: 37669874 PMCID: PMC10546974 DOI: 10.1101/gad.350713.123] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 07/28/2023] [Indexed: 09/07/2023]
Abstract
Protein tyrosine phosphatases (PTPs) are critical regulators of signal transduction but have yet to be exploited fully for drug development. Receptor protein tyrosine phosphatase δ (RPTPδ/PTPRD) has been shown to elicit tumor-promoting functions, including elevating SRC activity and promoting metastasis in certain cell contexts. Dimerization has been implicated in the inhibition of receptor protein tyrosine phosphatases (RPTPs). We have generated antibodies targeting PTPRD ectodomains with the goal of manipulating their dimerization status ectopically, thereby regulating intracellular signaling. We have validated antibody binding to endogenous PTPRD in a metastatic breast cancer cell line, CAL51, and demonstrated that a monoclonal antibody, RD-43, inhibited phosphatase activity and induced the degradation of PTPRD. Similar effects were observed following chemically induced dimerization of its phosphatase domain. Mechanistically, RD-43 triggered the formation of PTPRD dimers in which the phosphatase activity was impaired. Subsequently, the mAb-PTPRD dimer complex was degraded through lysosomal and proteasomal pathways, independently of secretase cleavage. Consequently, treatment with RD-43 inhibited SRC signaling and suppressed PTPRD-dependent cell invasion. Together, these findings demonstrate that manipulating RPTP function via antibodies to the extracellular segments has therapeutic potential.
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Affiliation(s)
- Zhe Qian
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
- Graduate Program of Molecular and Cellular Biology, Stony Brook University, Stony Brook, New York 11760, USA
| | - Dongyan Song
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - Jonathan J Ipsaro
- Howard Hughes Medical Institute, W.M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | | | - Leemor Joshua-Tor
- Howard Hughes Medical Institute, W.M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - Johannes T-H Yeh
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA
| | - Nicholas K Tonks
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA;
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4
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Parker SS, Ly KT, Grant AD, Sweetland J, Wang AM, Parker JD, Roman MR, Saboda K, Roe DJ, Padi M, Wolgemuth CW, Langlais P, Mouneimne G. EVL and MIM/MTSS1 regulate actin cytoskeletal remodeling to promote dendritic filopodia in neurons. J Cell Biol 2023; 222:e202106081. [PMID: 36828364 PMCID: PMC9998662 DOI: 10.1083/jcb.202106081] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 11/22/2022] [Accepted: 01/20/2023] [Indexed: 02/25/2023] Open
Abstract
Dendritic spines are the postsynaptic compartment of a neuronal synapse and are critical for synaptic connectivity and plasticity. A developmental precursor to dendritic spines, dendritic filopodia (DF), facilitate synapse formation by sampling the environment for suitable axon partners during neurodevelopment and learning. Despite the significance of the actin cytoskeleton in driving these dynamic protrusions, the actin elongation factors involved are not well characterized. We identified the Ena/VASP protein EVL as uniquely required for the morphogenesis and dynamics of DF. Using a combination of genetic and optogenetic manipulations, we demonstrated that EVL promotes protrusive motility through membrane-direct actin polymerization at DF tips. EVL forms a complex at nascent protrusions and DF tips with MIM/MTSS1, an I-BAR protein important for the initiation of DF. We proposed a model in which EVL cooperates with MIM to coalesce and elongate branched actin filaments, establishing the dynamic lamellipodia-like architecture of DF.
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Affiliation(s)
- Sara S. Parker
- Department of Cellular and Molecular Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Kenneth Tran Ly
- Department of Cellular and Molecular Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Adam D. Grant
- Cancer Biology Program, University of Arizona Cancer Center, Tucson, AZ, USA
| | - Jillian Sweetland
- Department of Cellular and Molecular Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Ashley M. Wang
- Department of Cellular and Molecular Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - James D. Parker
- Department of Cellular and Molecular Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Mackenzie R. Roman
- Division of Endocrinology, Department of Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Kathylynn Saboda
- University of Arizona Cancer Center and Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA
| | - Denise J. Roe
- University of Arizona Cancer Center and Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA
| | - Megha Padi
- Cancer Biology Program, University of Arizona Cancer Center, Tucson, AZ, USA
- Department of Molecular and Cellular Biology, College of Science, University of Arizona, Tucson, AZ, USA
| | - Charles W. Wolgemuth
- University of Arizona Cancer Center and Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA
- Department of Molecular and Cellular Biology, College of Science, University of Arizona, Tucson, AZ, USA
- Department of Physics, College of Science, University of Arizona, Tucson, AZ, USA
- Johns Hopkins Physical Sciences-Oncology Center, Johns Hopkins University, Baltimore, MD, USA
| | - Paul Langlais
- Division of Endocrinology, Department of Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Ghassan Mouneimne
- Department of Cellular and Molecular Medicine, College of Medicine, University of Arizona, Tucson, AZ, USA
- Cancer Biology Program, University of Arizona Cancer Center, Tucson, AZ, USA
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5
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Di Matteo A, Belloni E, Pradella D, Chiaravalli AM, Pini GM, Bugatti M, Alfieri R, Barzan C, Franganillo Tena E, Bione S, Terenzani E, Sessa F, Wyatt CDR, Vermi W, Ghigna C. Alternative Splicing Changes Promoted by NOVA2 Upregulation in Endothelial Cells and Relevance for Gastric Cancer. Int J Mol Sci 2023; 24:ijms24098102. [PMID: 37175811 PMCID: PMC10178952 DOI: 10.3390/ijms24098102] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
Angiogenesis is crucial for cancer progression. While several anti-angiogenic drugs are in use for cancer treatment, their clinical benefits are unsatisfactory. Thus, a deeper understanding of the mechanisms sustaining cancer vessel growth is fundamental to identify novel biomarkers and therapeutic targets. Alternative splicing (AS) is an essential modifier of human proteome diversity. Nevertheless, AS contribution to tumor vasculature development is poorly known. The Neuro-Oncological Ventral Antigen 2 (NOVA2) is a critical AS regulator of angiogenesis and vascular development. NOVA2 is upregulated in tumor endothelial cells (ECs) of different cancers, thus representing a potential driver of tumor blood vessel aberrancies. Here, we identified novel AS transcripts generated upon NOVA2 upregulation in ECs, suggesting a pervasive role of NOVA2 in vascular biology. In addition, we report that NOVA2 is also upregulated in ECs of gastric cancer (GC), and its expression correlates with poor overall survival of GC patients. Finally, we found that the AS of the Rap Guanine Nucleotide Exchange Factor 6 (RapGEF6), a newly identified NOVA2 target, is altered in GC patients and associated with NOVA2 expression, tumor angiogenesis, and poor patient outcome. Our findings provide a better understanding of GC biology and suggest that AS might be exploited to identify novel biomarkers and therapeutics for anti-angiogenic GC treatments.
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Affiliation(s)
- Anna Di Matteo
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
| | - Elisa Belloni
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
| | - Davide Pradella
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
| | | | - Giacomo Maria Pini
- Department of Pathology, Ospedale di Circolo, ASST-Sette Laghi, 21100 Varese, Italy
| | - Mattia Bugatti
- Department of Molecular and Translational Medicine, University of Brescia, 25100 Brescia, Italy
| | - Roberta Alfieri
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
| | - Chiara Barzan
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
- Istituto Universitario di Studi Superiori (IUSS), Università degli Studi di Pavia, 27100 Pavia, Italy
| | - Elena Franganillo Tena
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
- Dipartimento di Biologia e Biotecnologie "Lazzaro Spallanzani", Università degli Studi di Pavia, 27100 Pavia, Italy
| | - Silvia Bione
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
| | - Elisa Terenzani
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
| | - Fausto Sessa
- Department of Pathology, Ospedale di Circolo, ASST-Sette Laghi, 21100 Varese, Italy
- Department of Medicine and Surgery, Università degli Studi dell'Insubria, 21100 Varese, Italy
| | - Christopher D R Wyatt
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, 08036 Barcelona, Spain
| | - William Vermi
- Department of Molecular and Translational Medicine, University of Brescia, 25100 Brescia, Italy
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110-1010, USA
| | - Claudia Ghigna
- Istituto di Genetica Molecolare "Luigi Luca Cavalli-Sforza", Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
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6
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Chen M, Dong Y, Tian L, Zhou J, Zhu E, Yuan H, Li X, Wang B. Metastasis suppressor 1 interacts with protein tyrosine phosphatase receptor-δ to regulate adipogenesis. FASEB J 2023; 37:e22857. [PMID: 36906292 DOI: 10.1096/fj.202201322r] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 02/07/2023] [Accepted: 02/22/2023] [Indexed: 03/13/2023]
Abstract
Adipogenesis is a finely controlled process and its dysfunction may contribute to metabolic disorders such as obesity. Metastasis suppressor 1 (MTSS1) is a player in tumorigenesis and metastasis of various types of cancers. To date, it is not known whether and how MTSS1 plays a role in adipocyte differentiation. In the current study, we found that MTSS1 was upregulated during adipogenic differentiation of established mesenchymal cell lines and primary cultured bone marrow stromal cells. Gain-of-function and loss-of-function experiments uncovered that MTSS1 facilitated adipocyte differentiation from mesenchymal progenitor cells. Mechanistic explorations revealed that MTSS1 bound and interacted with FYN, a member of Src family of tyrosine kinases (SFKs), and protein tyrosine phosphatase receptor-δ (PTPRD). We demonstrated that PTPRD was capable of inducing the differentiation of adipocytes. Overexpression of PTPRD attenuated the impaired adipogenesis induced by the siRNA targeting MTSS1. Both MTSS1 and PTPRD activated SFKs by suppressing the phosphorylation of SFKs at Tyr530 and inducing the phosphorylation of FYN at Tyr419. Further investigation showed that MTSS1 and PTPRD were able to activate FYN. Collectively, our study has for the first time unraveled that MTSS1 plays a role in adipocyte differentiation in vitro through interacting with PTPRD and thereby activating SFKs such as FYN tyrosine kinase.
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Affiliation(s)
- Meng Chen
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Yuan Dong
- College of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Lijie Tian
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Jie Zhou
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Endong Zhu
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Hairui Yuan
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin, China
| | - Xiaoxia Li
- College of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Baoli Wang
- NHC Key Lab of Hormones and Development, Tianjin Key Lab of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Institute of Endocrinology, Tianjin Medical University, Tianjin, China
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7
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Senju Y, Mushtaq T, Vihinen H, Manninen A, Saarikangas J, Ven K, Engel U, Varjosalo M, Jokitalo E, Lappalainen P. Actin-rich lamellipodia-like protrusions contribute to the integrity of epithelial cell-cell junctions. J Biol Chem 2023; 299:104571. [PMID: 36871754 PMCID: PMC10173786 DOI: 10.1016/j.jbc.2023.104571] [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: 12/04/2022] [Revised: 01/11/2023] [Accepted: 02/01/2023] [Indexed: 03/06/2023] Open
Abstract
Metastasis-suppressor 1 (MTSS1) is a membrane-interacting scaffolding protein that regulates the integrity of epithelial cell-cell junctions and functions as a tumor suppressor in a wide range of carcinomas. MTSS1 binds phosphoinositide-rich membranes through its I-BAR domain, and is capable of sensing and generating negative membrane curvature in vitro. However, the mechanisms by which MTSS1 localizes to intercellular junctions in epithelial cells, and contributes to their integrity and maintenance have remained elusive. By carrying out electron microscopy and live-cell imaging on cultured Madin-Darby canine kidney (MDCK) cell monolayers, we provide evidence that adherens junctions of epithelial cells harbor lamellipodia-like, dynamic actin-driven membrane folds, which exhibit high negative membrane curvature at their distal edges. BioID proteomics and imaging experiments demonstrated that MTSS1 associates with an Arp2/3 complex activator, the WAVE-2 complex, in dynamic actin-rich protrusions at cell-cell junctions. Inhibition of Arp2/3 or WAVE-2 suppressed actin filament assembly at adherens junctions, decreased the dynamics of junctional membrane protrusions, and led to defects in epithelial integrity. Together, these results support a model in which membrane-associated MTSS1, together with the WAVE-2 and Arp2/3 complexes, promotes the formation of dynamic lamellipodia-like actin protrusions that contribute to the integrity of cell-cell junctions in epithelial monolayers.
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Affiliation(s)
- Yosuke Senju
- Research Institute for Interdisciplinary Science (RIIS), Okayama University, Japan.
| | - Toiba Mushtaq
- Helsinki Institute of Life Science (HiLIFE) - Institute of Biotechnology, University of Helsinki, Finland
| | - Helena Vihinen
- Helsinki Institute of Life Science (HiLIFE) - Institute of Biotechnology, University of Helsinki, Finland
| | - Aki Manninen
- Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, University of Oulu, Finland
| | - Juha Saarikangas
- Helsinki Institute of Life Science (HiLIFE), University of Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, Neuroscience Center, University of Helsinki, Finland
| | - Katharina Ven
- Helsinki Institute of Life Science (HiLIFE) - Institute of Biotechnology, University of Helsinki, Finland
| | - Ulrike Engel
- Nikon Imaging Center and Centre for Organismal Studies, Heidelberg University, Germany
| | - Markku Varjosalo
- Helsinki Institute of Life Science (HiLIFE) - Institute of Biotechnology, University of Helsinki, Finland
| | - Eija Jokitalo
- Helsinki Institute of Life Science (HiLIFE) - Institute of Biotechnology, University of Helsinki, Finland
| | - Pekka Lappalainen
- Helsinki Institute of Life Science (HiLIFE) - Institute of Biotechnology, University of Helsinki, Finland
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8
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Wang Y, Jia Z, Liang C, He Y, Cong M, Wu Q, Tian P, He D, Miao X, Sun B, Yin Y, Peng C, Yao F, Fu D, Liang Y, Zhang P, Xiong H, Hu G. MTSS1 curtails lung adenocarcinoma immune evasion by promoting AIP4-mediated PD-L1 monoubiquitination and lysosomal degradation. Cell Discov 2023; 9:20. [PMID: 36810288 PMCID: PMC9944270 DOI: 10.1038/s41421-022-00507-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 12/07/2022] [Indexed: 02/23/2023] Open
Abstract
Immune checkpoint blockade (ICB) therapy targeting PD-1/PD-L1 has shown durable clinical benefits in lung cancer. However, many patients respond poorly to ICB treatment, underscoring an incomplete understanding of PD-L1 regulation and therapy resistance. Here, we find that MTSS1 is downregulated in lung adenocarcinoma, leading to PD-L1 upregulation, impairment of CD8+ lymphocyte function, and enhanced tumor progression. MTSS1 downregulation correlates with improved ICB efficacy in patients. Mechanistically, MTSS1 interacts with the E3 ligase AIP4 for PD-L1 monoubiquitination at Lysine 263, leading to PD-L1 endocytic sorting and lysosomal degradation. In addition, EGFR-KRAS signaling in lung adenocarcinoma suppresses MTSS1 and upregulates PD-L1. More importantly, combining AIP4-targeting via the clinical antidepressant drug clomipramine and ICB treatment improves therapy response and effectively suppresses the growth of ICB-resistant tumors in immunocompetent mice and humanized mice. Overall, our study discovers an MTSS1-AIP4 axis for PD-L1 monoubiquitination and reveals a potential combinatory therapy with antidepressants and ICB.
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Affiliation(s)
- Yuan Wang
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Zhenchang Jia
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Chenxi Liang
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yunfei He
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Min Cong
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Qiuyao Wu
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Pu Tian
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Dasa He
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiang Miao
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Beibei Sun
- grid.16821.3c0000 0004 0368 8293Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Yue Yin
- grid.9227.e0000000119573309National Facility for Protein Science in Shanghai, Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai, China
| | - Chao Peng
- grid.9227.e0000000119573309National Facility for Protein Science in Shanghai, Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai, China
| | - Feng Yao
- grid.16821.3c0000 0004 0368 8293Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Da Fu
- grid.412538.90000 0004 0527 0050Department of Nuclear Medicine, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China ,grid.16821.3c0000 0004 0368 8293General Surgery, Ruijin Hospital & Institute of Pancreatic Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yajun Liang
- grid.410726.60000 0004 1797 8419Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Peiyuan Zhang
- Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.
| | - Hua Xiong
- Department of Oncology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China.
| | - Guohong Hu
- Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.
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9
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Bending over backwards: BAR proteins and the actin cytoskeleton in mammalian receptor-mediated endocytosis. Eur J Cell Biol 2022; 101:151257. [PMID: 35863103 DOI: 10.1016/j.ejcb.2022.151257] [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: 02/25/2022] [Revised: 07/13/2022] [Accepted: 07/14/2022] [Indexed: 11/21/2022] Open
Abstract
The role of the actin cytoskeleton during receptor-mediated endocytosis (RME) has been well characterized in yeast for many years. Only more recently has the interplay between the actin cytoskeleton and RME been extensively explored in mammalian cells. These studies have revealed the central roles of BAR proteins in RME, and have demonstrated significant roles of BAR proteins in linking the actin cytoskeleton to this cellular process. The actin cytoskeleton generates and transmits mechanical force to promote the extension of receptor-bound endocytic vesicles into the cell. Many adaptor proteins link and regulate the actin cytoskeleton at the sites of endocytosis. This review will cover key effectors, adaptors and signalling molecules that help to facilitate the invagination of the cell membrane during receptor-mediated endocytosis, including recent insights gained on the roles of BAR proteins. The final part of this review will explore associations of alterations to genes encoding BAR proteins with cancer.
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10
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Mirahmadi Y, Nabavi R, Taheri F, Samadian MM, Ghale-Noie ZN, Farjami M, Samadi-khouzani A, Yousefi M, Azhdari S, Salmaninejad A, Sahebkar A. MicroRNAs as Biomarkers for Early Diagnosis, Prognosis, and Therapeutic Targeting of Ovarian Cancer. JOURNAL OF ONCOLOGY 2021; 2021:3408937. [PMID: 34721577 PMCID: PMC8553480 DOI: 10.1155/2021/3408937] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/27/2021] [Indexed: 02/06/2023]
Abstract
Ovarian cancer is the major cause of gynecologic cancer-related mortality. Regardless of outstanding advances, which have been made for improving the prognosis, diagnosis, and treatment of ovarian cancer, the majority of the patients will die of the disease. Late-stage diagnosis and the occurrence of recurrent cancer after treatment are the most important causes of the high mortality rate observed in ovarian cancer patients. Unraveling the molecular mechanisms involved in the pathogenesis of ovarian cancer may help find new biomarkers and therapeutic targets for ovarian cancer. MicroRNAs (miRNAs) are small noncoding RNAs that regulate gene expression, mostly at the posttranscriptional stage, through binding to mRNA targets and inducing translational repression or degradation of target via the RNA-induced silencing complex. Over the last two decades, the role of miRNAs in the pathogenesis of various human cancers, including ovarian cancer, has been documented in multiple studies. Consequently, these small RNAs could be considered as reliable markers for prognosis and early diagnosis. Furthermore, given the function of miRNAs in various cellular pathways, including cell survival and differentiation, targeting miRNAs could be an interesting approach for the treatment of human cancers. Here, we review our current understanding of the most updated role of the important dysregulation of miRNAs and their roles in the progression and metastasis of ovarian cancer. Furthermore, we meticulously discuss the significance of miRNAs as prognostic and diagnostic markers. Lastly, we mention the opportunities and the efforts made for targeting ovarian cancer through inhibition and/or stimulation of the miRNAs.
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Affiliation(s)
- Yegane Mirahmadi
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Medical Genetics Research Centre, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Fourough Taheri
- Department of Biology, Faculty of Basic Sciences, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - Mohammad Mahdi Samadian
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zari Naderi Ghale-Noie
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Medical Genetics Research Centre, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahsa Farjami
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Medical Genetics Research Centre, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Abbas Samadi-khouzani
- Department of Biology, Faculty of Basic Sciences, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - Meysam Yousefi
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Sara Azhdari
- Department of Anatomy and Embryology, School of Medicine, Bam University of Medical Sciences, Bam, Iran
| | - Arash Salmaninejad
- Department of Medical Genetics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Medical Genetics Research Centre, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Medical Genetics, Faculty of Medicine, Guilan University of Medical Sciences, Guilan, Iran
| | - Amirhossein Sahebkar
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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11
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Khan I, Steeg PS. Endocytosis: a pivotal pathway for regulating metastasis. Br J Cancer 2021; 124:66-75. [PMID: 33262521 PMCID: PMC7782782 DOI: 10.1038/s41416-020-01179-8] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/30/2020] [Accepted: 11/04/2020] [Indexed: 12/16/2022] Open
Abstract
A potentially important aspect in the regulation of tumour metastasis is endocytosis. This process consists of internalisation of cell-surface receptors via pinocytosis, phagocytosis or receptor-mediated endocytosis, the latter of which includes clathrin-, caveolae- and non-clathrin or caveolae-mediated mechanisms. Endocytosis then progresses through several intracellular compartments for sorting and routing of cargo, ending in lysosomal degradation, recycling back to the cell surface or secretion. Multiple endocytic proteins are dysregulated in cancer and regulate tumour metastasis, particularly migration and invasion. Importantly, four metastasis suppressor genes function in part by regulating endocytosis, namely, the NME, KAI, MTSS1 and KISS1 pathways. Data on metastasis suppressors identify a new point of dysregulation operative in tumour metastasis, alterations in signalling through endocytosis. This review will focus on the multicomponent process of endocytosis affecting different steps of metastasis and how metastatic-suppressor genes use endocytosis to suppress metastasis.
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Affiliation(s)
- Imran Khan
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA.
| | - Patricia S Steeg
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, 20892, USA
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12
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Sarapulov AV, Petrov P, Hernández-Pérez S, Šuštar V, Kuokkanen E, Cords L, Samuel RVM, Vainio M, Fritzsche M, Carrasco YR, Mattila PK. Missing-in-Metastasis/Metastasis Suppressor 1 Regulates B Cell Receptor Signaling, B Cell Metabolic Potential, and T Cell-Independent Immune Responses. Front Immunol 2020; 11:599. [PMID: 32373113 PMCID: PMC7176992 DOI: 10.3389/fimmu.2020.00599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 03/16/2020] [Indexed: 11/13/2022] Open
Abstract
Efficient generation of antibodies by B cells is one of the prerequisites of protective immunity. B cell activation by cognate antigens via B cell receptors (BCRs), or pathogen-associated molecules through pattern-recognition receptors, such as Toll-like receptors (TLRs), leads to transcriptional and metabolic changes that ultimately transform B cells into antibody-producing plasma cells or memory cells. BCR signaling and a number of steps downstream of it rely on coordinated action of cellular membranes and the actin cytoskeleton, tightly controlled by concerted action of multiple regulatory proteins, some of them exclusive to B cells. Here, we dissect the role of Missing-In-Metastasis (MIM), or Metastasis suppressor 1 (MTSS1), a cancer-associated membrane and actin cytoskeleton regulating protein, in B cell-mediated immunity by taking advantage of MIM knockout mouse strain. We show undisturbed B cell development and largely normal composition of B cell compartments in the periphery. Interestingly, we found that MIM-/- B cells are defected in BCR signaling in response to surface-bound antigens but, on the other hand, show increased metabolic activity after stimulation with LPS or CpG. In vivo, MIM knockout animals exhibit impaired IgM antibody responses to immunization with T cell-independent antigen. This study provides the first comprehensive characterization of MIM in B cells, demonstrates its regulatory role for B cell-mediated immunity, as well as proposes new functions for MIM in tuning receptor signaling and cellular metabolism, processes, which may also contribute to the poorly understood functions of MIM in cancer.
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Affiliation(s)
- Alexey V. Sarapulov
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
- Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland
| | - Petar Petrov
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
- Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland
| | - Sara Hernández-Pérez
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
- Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland
| | - Vid Šuštar
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
| | - Elina Kuokkanen
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
| | - Lena Cords
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Rufus V. M. Samuel
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
| | - Marika Vainio
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
- Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland
| | - Marco Fritzsche
- Kennedy Institute for Rheumatology, University of Oxford, Oxford, United Kingdom
- Rosalind Franklin Institute, Didcot, United Kingdom
| | - Yolanda R. Carrasco
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CNB)-CSIC, Madrid, Spain
| | - Pieta K. Mattila
- Institute of Biomedicine and MediCity Research Laboratories, University of Turku, Turku, Finland
- Turku Bioscience, University of Turku and Åbo Akademi University, Turku, Finland
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13
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Cong M, Wang Y, Yang Y, Lian C, Zhuang X, Li X, Zhang P, Liu Y, Tang J, Yang Q, Zhang X, Xiong H, Hu R, Hu G. MTSS1 suppresses mammary tumor-initiating cells by enhancing RBCK1-mediated p65 ubiquitination. NATURE CANCER 2020; 1:222-234. [PMID: 35122005 DOI: 10.1038/s43018-019-0021-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 12/13/2019] [Indexed: 12/22/2022]
Abstract
Tumor-initiating cells (TICs) are considered the culprits of cancer development and progression. Dysregulation of metastasis suppressor protein 1 (MTSS1) has been widely observed in tumor metastasis, but its functional contribution and mechanism in cancer is poorly understood. Here we report a role of MTSS1 in suppressing TICs in breast cancer. Mtss1 knockout (KO) enhances the mammary epithelial TIC subpopulation in both luminal and basal-like breast cancer mouse models. MTSS1 also suppresses tumorsphere formation in breast cancer cells. Mechanistically, MTSS1 interacts with the E3 ligase RanBP2-type and C3HC4-type zinc finger containing 1 (RBCK1) to facilitate RBCK1-mediated p65 ubiquitination and degradation, thus suppressing the NF-κB signaling pathway and tumorigenesis. In addition, actin beta-like 2 (ACTBL2) competes with RBCK1 for MTSS1 binding, leading to p65 stabilization. Importantly, MTSS1 silencing promotes patient-derived organoid formation and xenograft growth. MTSS1 downregulation in clinical tumors is also linked to worse prognosis. Overall our data reveal a new paradigm of NF-κB regulation and may have important implications in therapeutics targeting TICs.
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Affiliation(s)
- Min Cong
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yuan Wang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yang Yang
- State Key Laboratory of Molecular Biology, CAS Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Shanghai Institute of Biochemistry and Cell Biology, University of Chinese Academy of Sciences, Shanghai, China
| | - Cheng Lian
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xueqian Zhuang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Xiaoxun Li
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Peiyuan Zhang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Yingjie Liu
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Jun Tang
- State Key Laboratory of Oncology in South China; Department of Breast Oncology, Sun Yat-Sen University, Guangzhou, China
| | - Qifeng Yang
- Department of Breast Surgery, Qilu Hospital of Shandong University, Ji'nan, China
| | - Xue Zhang
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Hua Xiong
- Department of Oncology, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China.
| | - Ronggui Hu
- State Key Laboratory of Molecular Biology, CAS Center for Excellence in Molecular Cell Science, Innovation Center for Cell Signaling Network, Shanghai Institute of Biochemistry and Cell Biology, University of Chinese Academy of Sciences, Shanghai, China.
| | - Guohong Hu
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.
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14
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Brown AS, Meera P, Quinones G, Magri J, Otis TS, Pulst SM, Oro AE. Receptor protein tyrosine phosphatases control Purkinje neuron firing. Cell Cycle 2020; 19:153-159. [PMID: 31876231 PMCID: PMC6961678 DOI: 10.1080/15384101.2019.1695995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 10/23/2019] [Accepted: 11/07/2019] [Indexed: 10/25/2022] Open
Abstract
Spinocerebellar ataxias (SCA) are a genetically heterogeneous family of cerebellar neurodegenerative diseases characterized by abnormal firing of Purkinje neurons and degeneration. We recently demonstrated the slowed firing rates seen in several SCAs share a common etiology of hyper-activation of the Src family of non-receptor tyrosine kinases (SFKs). However, the lack of clinically available neuroactive SFK inhibitors lead us to investigate alternative mechanisms to modulate SFK activity. Previous studies demonstrate that SFK activity can be enhanced by the removal of inhibitory phospho-marks by receptor-protein-tyrosine phosphatases (RPTPs). In this Extra View we show that MTSS1 inhibits SFK activity through the binding and inhibition of a subset of the RPTP family members, and lowering RPTP activity in cerebellar slices with peptide inhibitors increases the suppressed Purkinje neuron basal firing rates seen in two different SCA models. Together these results identify RPTPs as novel effectors of Purkinje neuron basal firing, extending the MTSS1/SFK regulatory circuit we previously described and expanding the therapeutic targets for SCA patients.
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Affiliation(s)
- Alexander S. Brown
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Pratap Meera
- Department of Neurobiology, University of California, Los Angeles, CA, USA
| | - Gabe Quinones
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Jessica Magri
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Thomas S. Otis
- Sainsbury Wellcome Centre for Neural Circuits and Behavior, University College London, London, UK
| | - Stefan M. Pulst
- Department of Neurology, University of Utah Medical Center, Salt Lake City, UT, USA
| | - Anthony E. Oro
- Program in Epithelial Biology, Stanford University School of Medicine, Stanford, CA, USA
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15
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Uhl GR, Martinez MJ. PTPRD: neurobiology, genetics, and initial pharmacology of a pleiotropic contributor to brain phenotypes. Ann N Y Acad Sci 2019; 1451:112-129. [PMID: 30648269 PMCID: PMC6629525 DOI: 10.1111/nyas.14002] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/12/2018] [Accepted: 12/19/2018] [Indexed: 12/12/2022]
Abstract
Receptor-type protein tyrosine phosphatase, receptor type D (PTPRD) has likely roles as a neuronal cell adhesion molecule and synaptic specifier. Interest in its neurobiology and genomics has been stimulated by results from human genetics and mouse models for phenotypes related to addiction, restless leg syndrome, neurofibrillary pathology in Alzheimer's disease, cognitive impairment/intellectual disability, mood lability, and obsessive-compulsive disorder. We review PTPRD's discovery, gene family, candidate homomeric and heteromeric binding partners, phosphatase activities, brain distribution, human genetic associations with nervous system phenotypes, and mouse model data relevant to these phenotypes. We discuss the recently reported discovery of the first small molecule inhibitor of PTPRD phosphatase, the identification of its addiction-related effects, and the implications of these findings for the PTPRD-associated brain phenotypes. In assembling PTPRD neurobiology, human genetics, and mouse genetic and pharmacological datasets, we provide a compelling picture of the roles played by PTPRD, its variation, and its potential as a target for novel therapeutics.
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Affiliation(s)
- George R Uhl
- Neurology and Research Services, New Mexico VA Healthcare System, Albuquerque, New Mexico.,Departments of Neurology, Neuroscience, Molecular Genetics and Microbiology, University of New Mexico, Albuquerque, New Mexico.,Biomedical Research Institute of New Mexico, Albuquerque, New Mexico.,Departments of Neurology, Neuroscience and Mental Health, Johns Hopkins Medical Institutions, Baltimore, Maryland
| | - Maria J Martinez
- Neurology and Research Services, New Mexico VA Healthcare System, Albuquerque, New Mexico.,Biomedical Research Institute of New Mexico, Albuquerque, New Mexico
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16
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Hu C, Zhou Y, Liu C, Kang Y. Risk assessment model constructed by differentially expressed lncRNAs for the prognosis of glioma. Oncol Rep 2018; 40:2467-2476. [PMID: 30106138 PMCID: PMC6151882 DOI: 10.3892/or.2018.6639] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Accepted: 08/01/2018] [Indexed: 02/05/2023] Open
Abstract
A risk assessment model was constructed using differentially expressed long non‑coding (lnc)RNAs for the prognosis of glioma. Transcriptome sequencing of the lncRNAs and mRNAs from glioma samples were obtained from the TCGA database. The samples were divided into bad and good prognosis groups based on survival time, then differently expressed lncRNAs between these two groups were screened using DEseq and edgeR packages. Multivariate Cox regression analysis was performed to establish a risk assessment system according to the weighted regression coefficient of lncRNA expression. Survival analysis and receiver operating characteristic curve were conducted for the risk assessment model. Furthermore, the co‑expression network of the screened lncRNAs was constructed, followed by the functional enrichment analysis for associated genes. A total of 117 lncRNAs were screened using edgeR and DEseq packages. Among all differently expressed lncRNAs, five lncRNAs (RP3‑503A6, LINC00940, RP11‑453M23, AC009411 and CDRT7) were identified to establish the risk assessment model. The risk assessment model demonstrated a good prognostic function with high area under the curve values in the training, validation and entire sets. The risk score was certified as an independent prognostic factor for gliomas. Multiple genes were screened to be co‑expressed with these five lncRNAs. Functional enrichment analysis demonstrated that they were involved in cytoskeleton, adhesion and Janus kinase/signal transducer and activator of transcription signaling pathway‑associated processes. The present study established a risk assessment model integrating five significantly different expressed lncRNAs, which may help to assess the prognosis of patients with glioma with increased accuracy.
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Affiliation(s)
- Chenggong Hu
- Department of Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yongfang Zhou
- Department of Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Chang Liu
- Department of Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yan Kang
- Department of Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan 610041, P.R. China
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17
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Kawabata Galbraith K, Fujishima K, Mizuno H, Lee SJ, Uemura T, Sakimura K, Mishina M, Watanabe N, Kengaku M. MTSS1 Regulation of Actin-Nucleating Formin DAAM1 in Dendritic Filopodia Determines Final Dendritic Configuration of Purkinje Cells. Cell Rep 2018; 24:95-106.e9. [DOI: 10.1016/j.celrep.2018.06.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 05/01/2018] [Accepted: 06/01/2018] [Indexed: 10/28/2022] Open
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18
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Xu N, Yang W, Liu Y, Yan F, Yu Z. MicroRNA-411 promoted the osteosarcoma progression by suppressing MTSS1 expression. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:12064-12071. [PMID: 29453719 DOI: 10.1007/s11356-018-1331-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 01/18/2018] [Indexed: 06/08/2023]
Abstract
MicroRNAs (miRNAs) play crucial roles in the progression of different tumors. In our study, we investigated the expression and roles of miR-411 in human osteosarcoma. In this study, we first confirmed that the miR-411 expression was higher in the serum of patients with osteosarcoma than in the serum of healthy volunteers. In addition, we found that the miR-411 expression was upregulated in the osteosarcoma tissues compared to that in the matched normal bone tissues. We also demonstrated that the miR-411 expression was upregulated in the four osteosarcoma cell lines. Elevated expression of miR-411 promoted osteosarcoma cell proliferation and migration. Moreover, we identified that metastasis suppressor protein 1 (MTSS1) was a direct target gene of miR-411 in the osteosarcoma cell. We also demonstrated that the MTSS1 expression was downregulated in the osteosarcoma tissues compared to that in the matched normal bone tissues. In addition, MTSS1 expression level was inversely correlated with miR-411 expression in the osteosarcoma tissues. Furthermore, elevated expression of miR-411 enhanced the osteosarcoma cell proliferation and migration through inhibiting the MTSS1 expression. These data suggested that miR-411 played as oncogene in the osteosarcoma partly by inhibiting the MTSS1 expression.
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Affiliation(s)
- Ning Xu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China
| | - Weiliang Yang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China
| | - Yang Liu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China
| | - Feng Yan
- Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China
| | - Zhange Yu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
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19
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Shuyskiy LS, Levchenko VV, Negulyaev YA, Staruschenko AV, Ilatovskaya DV. Role of the Scaffold Protein MIM in the Actin-Dependent Regulation of Epithelial Sodium Channels (ENaC). Acta Naturae 2018; 10:97-103. [PMID: 30116621 PMCID: PMC6087825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Epithelial Sodium Channels (ENaCs) are expressed in different organs and tissues, particularly in the cortical collecting duct (CCD) in the kidney, where they fine tune sodium reabsorption. Dynamic rearrangements of the cytoskeleton are one of the common mechanisms of ENaC activity regulation. In our previous studies, we showed that the actin-binding proteins cortactin and Arp2/3 complex are involved in the cytoskeleton-dependent regulation of ENaC and that their cooperative work decreases a channel's probability of remaining open; however, the specific mechanism of interaction between actin-binding proteins and ENaC is unclear. In this study, we propose a new component for the protein machinery involved in the regulation of ENaC, the missing-in-metastasis (MIM) protein. The MIM protein contains an IMD domain (for interaction with PIP2 -rich plasma membrane regions and Rac GTPases; this domain also possesses F-actin bundling activity), a PRD domain (for interaction with cortactin), and a WH2 domain (interaction with G-actin). The patch-clamp electrophysiological technique in whole-cell configuration was used to test the involvement of MIM in the actin-dependent regulation of ENaC. Co-transfection of ENaC subunits with the wild-type MIM protein (or its mutant forms) caused a significant reduction in ENaC-mediated integral ion currents. The analysis of the F-actin structure after the transfection of MIM plasmids showed the important role played by the domains PRD and WH2 of the MIM protein in cytoskeletal rearrangements. These results suggest that the MIM protein may be a part of the complex of actin-binding proteins which is responsible for the actin-dependent regulation of ENaC in the CCD.
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Affiliation(s)
- L. S. Shuyskiy
- Institute of Cytology of RAS, Tikhoretskij Ave. 4, St. Petersburg, 194064, Russia , Department of Physiology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - V. V. Levchenko
- Department of Physiology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - Y. A. Negulyaev
- Institute of Cytology of RAS, Tikhoretskij Ave. 4, St. Petersburg, 194064, Russia , Department of Medical Physics, Peter the Great St. Petersburg Polytechnic University, Politekhnicheskaya Str. 2, St. Petersburg, 195251, Russia
| | - A. V. Staruschenko
- Department of Physiology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
| | - D. V. Ilatovskaya
- Department of Physiology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA , Medical University of South Carolina, Department of Medicine, Division of Nephrology, 96 Jonathan Lucas St, MSC 629 CSB 822, Charleston, SC 29425, USA
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20
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Zeleniak AE, Huang W, Fishel ML, Hill R. PTEN-Dependent Stabilization of MTSS1 Inhibits Metastatic Phenotype in Pancreatic Ductal Adenocarcinoma. Neoplasia 2017; 20:12-24. [PMID: 29175021 PMCID: PMC5714254 DOI: 10.1016/j.neo.2017.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/10/2017] [Accepted: 10/23/2017] [Indexed: 12/19/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) presents at metastatic stage in over 50% of patients. With a survival rate of just 2.7% for patients presenting with distant disease, it is imperative to uncover novel mechanisms capable of suppressing metastasis in PDAC. Previously, we reported that the loss of metastasis suppressor protein 1 (MTSS1) in PDAC cells results in significant increase in cellular migration and invasion. Conversely, we also found that overexpressing MTSS1 in metastatic PDAC cell lines corresponds with not only decreased metastatic phenotype, but also greater overall survival. While it is known that MTSS1 is downregulated in late-stage PDAC, the mechanism behind that loss has not yet been elucidated. Here, we build off our previous findings to present a novel regulatory mechanism for the stabilization of MTSS1 via the tumor suppressor protein phosphatase and tensin homolog (PTEN). We show that PTEN loss in PDAC cells results in a decrease in MTSS1 expression and increased metastatic potential. Additionally, we demonstrate that PTEN forms a complex with MTSS1 in order to stabilize and protect it from proteasomal degradation. Finally, we show that the inflammatory tumor microenvironment, which makes up over 90% of PDAC tumor bulk, is capable of downregulating PTEN expression through secretion of miRNA-23b, potentially uncovering a novel extrinsic mechanism of MTSS1 regulation. Collectively, these data offer new insight into the role and regulation of MTSS1in suppressing tumor cell invasion and migration and help shed light as to what molecular mechanisms could be leading to early cell dissemination in PDAC.
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Affiliation(s)
- Ann E Zeleniak
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN 46556, USA; Integrated Biomedical Sciences Program, University of Notre Dame, South Bend, IN 46556, USA
| | - Wei Huang
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN 46556, USA; Department of Biological Sciences, University of Notre Dame, South Bend, IN 46556, USA
| | - Melissa L Fishel
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Pediatrics, Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Pancreatic Cancer Signature Center, Indianapolis, IN 46202, USA
| | - Reginald Hill
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN 46556, USA; Department of Biological Sciences, University of Notre Dame, South Bend, IN 46556, USA.
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21
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Huang XY, Huang ZL, Niu T, Wu ZQ, Xu B, Xu YH, Huang XY, Zheng Q, Zhou J, Chen Z, Tang ZY. Missing-in-metastasis B (MIM-B) combined with caveolin-1 promotes metastasis of hepatocellular carcinoma. Oncotarget 2017; 8:95450-95465. [PMID: 29221140 PMCID: PMC5707034 DOI: 10.18632/oncotarget.20735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 08/04/2017] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Increasing amounts of evidence indicate that Missing in metastasis B (MIM-B) promotes cancer metastasis. Here, we sought to better understand the mechanism through which MIM-B promotes tumor metastasis in hepatocellular carcinoma (HCC). METHODS We performed confocal microscopy analysis to determine the distributions of MIM-B and caveolin-1 and conducted co-immunoprecipitation assays to detect the interactions between MIM-B and caveolin-1 in vitro. We performed transwell assays to analyze the invasive ability of HCC cells. Changes in the expression levels of key genes and some molecular makers were detected by immunohistochemistry and western blotting in HCC tissue samples. RESULTS We found that MIM-B co-localizes with caveolin-1 and demonstrated that MIM-B and caveolin-1 interact in vitro. Repressing MIM-B and caveolin-1 expression inhibited the epidermal growth factor receptor signaling pathway. We overexpressed MIM-B and caveolin-1 in Hep3B cells, which enhanced Hep3B cell invasiveness. Furthermore, MHCC97H cell invasiveness was significantly decreased in cells in which MIM-B and caveolin-1 expression was inhibited. Additionally, we found that MIM-B and caveolin-1 were expressed at higher levels in HCC tissues than in paired normal tissues. Moreover, HCC patients with MIM-B and caveolin-1 up-regulation experienced significantly worse outcomes than controls (P < 0.001), and HCC patients with high MIM-B and caveolin-1 expression levels often developed pulmonary metastasis (P < 0.001). CONCLUSIONS MIM-B combined with caveolin-1 promotes metastasis of HCC, and elevated MIM-B and caveolin-1 expression levels are associated with a poor prognosis in HCC patients; therefore, MIM-B and caveolin-1 may represent novel targets for the diagnosis and treatment of HCC.
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Affiliation(s)
- Xiu-Yan Huang
- Department of General Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, P.R. China
| | - Zi-Li Huang
- Department of Radiology, Xuhui Central Hospital, Shanghai, P.R. China
| | - Tao Niu
- Department of General Surgery, People's Hospital of Menghai County, Yunnan Province, P.R. China
| | - Zhen-Qian Wu
- Department of General Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, P.R. China
| | - Bin Xu
- Department of General Surgery, The Tenth People's Hospital of Tongji University, Shanghai, P.R. China
| | - Yong-Hua Xu
- Department of Radiology, Xuhui Central Hospital, Shanghai, P.R. China
| | - Xin-Yu Huang
- Department of General Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, P.R. China
| | - Qi Zheng
- Department of General Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, P.R. China
| | - Jian Zhou
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, P.R. China
| | - Zi Chen
- Thayer School of Engineering, Norris Cotton Cancer Center, Dartmouth College, Hanover, NH, USA
| | - Zhao-You Tang
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, P.R. China
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22
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Salzer U, Kostan J, Djinović-Carugo K. Deciphering the BAR code of membrane modulators. Cell Mol Life Sci 2017; 74:2413-2438. [PMID: 28243699 PMCID: PMC5487894 DOI: 10.1007/s00018-017-2478-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 01/25/2017] [Accepted: 01/27/2017] [Indexed: 01/06/2023]
Abstract
The BAR domain is the eponymous domain of the “BAR-domain protein superfamily”, a large and diverse set of mostly multi-domain proteins that play eminent roles at the membrane cytoskeleton interface. BAR domain homodimers are the functional units that peripherally associate with lipid membranes and are involved in membrane sculpting activities. Differences in their intrinsic curvatures and lipid-binding properties account for a large variety in membrane modulating properties. Membrane activities of BAR domains are further modified and regulated by intramolecular or inter-subunit domains, by intermolecular protein interactions, and by posttranslational modifications. Rather than providing detailed cell biological information on single members of this superfamily, this review focuses on biochemical, biophysical, and structural aspects and on recent findings that paradigmatically promote our understanding of processes driven and modulated by BAR domains.
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Affiliation(s)
- Ulrich Salzer
- Max F. Perutz Laboratories, Department of Medical Biochemistry, Medical University of Vienna, Dr. Bohr-Gasse 9, 1030, Vienna, Austria
| | - Julius Kostan
- Max F. Perutz Laboratories, Department of Structural and Computational Biology, University of Vienna, Campus Vienna Biocenter 5, 1030, Vienna, Austria
| | - Kristina Djinović-Carugo
- Max F. Perutz Laboratories, Department of Structural and Computational Biology, University of Vienna, Campus Vienna Biocenter 5, 1030, Vienna, Austria.
- Department of Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 119, 1000, Ljubljana, Slovenia.
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Luxen D, Gielen GH, Waha A, Isselstein L, Müller T, Koch P, Hammes J, Becker A, Simon M, Wurst P, Endl E, Pietsch T, Gessi M, Waha A. MTSS1 is epigenetically regulated in glioma cells and inhibits glioma cell motility. Transl Oncol 2017; 10:70-79. [PMID: 27988423 PMCID: PMC5167248 DOI: 10.1016/j.tranon.2016.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 11/18/2016] [Accepted: 11/22/2016] [Indexed: 12/23/2022] Open
Abstract
Epigenetic silencing by DNA methylation in brain tumors has been reported for many genes, however, their function on pathogenesis needs to be evaluated. We investigated the MTSS1 gene, identified as hypermethylated by differential methylation hybridization (DMH). Fifty-nine glioma tissue samples and seven glioma cell lines were examined for hypermethylation of the MTSS1 promotor, MTSS1 expression levels and gene dosage. GBM cell lines were treated with demethylating agents and interrogated for functional consequences of MTSS1 expression after transient transfection. Hypermethylation was significantly associated with IDH1/2 mutation. Comparative SNP analysis indicates higher incidence of loss of heterozygosity of MTSS1 in anaplastic astrocytomas and secondary glioblastomas as well as hypermethylation of the remaining allele. Reversal of promoter hypermethylation results in an increased MTSS1 expression. Cell motility was significantly inhibited by MTSS1 overexpression without influencing cell growth or apoptosis. Immunofluorescence analysis of MTSS1 in human astrocytes indicates co-localization with actin filaments. MTSS1 is down-regulated by DNA methylation in glioblastoma cell lines and is part of the G-CIMP phenotype in primary glioma tissues. Our data on normal astrocytes suggest a function of MTSS1 at focal contact structures with an impact on migratory capacity but no influence on apoptosis or cellular proliferation.
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Affiliation(s)
- Daniel Luxen
- Department of Neuropathology, University of Bonn, Germany
| | | | - Anke Waha
- Department of Neuropathology, University of Bonn, Germany
| | | | - Tim Müller
- Department of Neuropathology, University of Bonn, Germany
| | - Philipp Koch
- Institute of Reconstructive Neurobiology, LIFE & BRAIN, University of Bonn, Germany
| | | | - Albert Becker
- Department of Neuropathology, University of Bonn, Germany
| | | | - Peter Wurst
- Department of Molecular Medicine and Experimental Immunology, (Core Facility Flow Cytometry) University of Bonn, Germany
| | - Elmar Endl
- Department of Molecular Medicine and Experimental Immunology, (Core Facility Flow Cytometry) University of Bonn, Germany
| | | | - Marco Gessi
- Department of Neuropathology, University of Bonn, Germany
| | - Andreas Waha
- Department of Neuropathology, University of Bonn, Germany.
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Role of Akt2 in regulation of metastasis suppressor 1 expression and colorectal cancer metastasis. Oncogene 2017; 36:3104-3118. [PMID: 28068324 DOI: 10.1038/onc.2016.460] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 10/27/2016] [Accepted: 10/31/2016] [Indexed: 12/15/2022]
Abstract
Survival signaling is critical for the metastatic program of cancer cells. The current study investigated the role of Akt survival proteins in colorectal cancer (CRC) metastasis and explored potential mechanisms of Akt-mediated metastasis regulation. Using an orthotopic implantation model in mice, which uniquely recapitulates the entire multistep process of CRC metastasis, combined with an inducible system of short hairpin RNA-mediated Akt isoform knockdown in human CRC cells, our studies confirm a role of Akt2 in CRC cell dissemination to distant organs in vivo. Akt2 deficiency profoundly inhibited the development of liver lesions in mice, whereas Akt1 had no effect under the experimental conditions used in the study. Array analysis of human metastatic genes identified the scaffolding protein metastasis suppressor 1 (MTSS1) as a novel Akt2-regulated gene. Inducible loss of Akt2 in CRC cells robustly upregulated MTSS1 at the messenger RNA and protein level, and the accumulated protein was functionally active as shown by its ability to engage an MTSS1-Src-cortactin inhibitory axis. MTSS1 expression led to a marked reduction in levels of functional cortacin (pcortactin Y421), an actin nucleation-promoting factor that has a crucial role in cancer cell invasion and metastasis. MTSS1 was also shown to mediate suppressive effects of Akt2 deficiency on CRC cell viability, survival, migration and actin polymerization in vitro. The relevance of these findings to human CRC is supported by analysis of The Cancer Genome Atlas (TCGA) and NCBI GEO data sets, which demonstrated inverse changes in expression of Akt2 and MTSS1 during CRC progression. Taken together, the data identify MTSS1 as a new Akt2-regulated gene, and point to suppression of MTSS1 as a key step in the metastasis-promoting effects of Akt2 in CRC cells.
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Stanishneva-Konovalova T, Derkacheva N, Polevova S, Sokolova O. The Role of BAR Domain Proteins in the Regulation of Membrane Dynamics. Acta Naturae 2016; 8:60-69. [PMID: 28050267 PMCID: PMC5199207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Indexed: 11/09/2022] Open
Abstract
Many cellular processes are associated with membrane remodeling. The BAR domain protein family plays a key role in the formation and detection of local membrane curvatures and in attracting other proteins, including the regulators of actin dynamics. Based on their structural and phylogenetic properties, BAR domains are divided into several groups which affect membrane in various ways and perform different functions in cells. However, recent studies have uncovered evidence of functional differences even within the same group. This review discusses the principles underlying the interactions of different groups of BAR domains, and their individual representatives ,with membranes.
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Affiliation(s)
| | - N.I. Derkacheva
- A.I. Evdokimov Moscow State University of Medicine and Dentistry, Department of Biochemistry, Delegatskaya Str. 20, Bld 1, Moscow, 127473, Russia
| | - S.V. Polevova
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1, Bld 12, Moscow, 119234 , Russia
| | - O.S. Sokolova
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1, Bld 12, Moscow, 119234 , Russia
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26
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Wang Z, Wang Z, Zhou Z, Ren Y. Crucial genes associated with diabetic nephropathy explored by microarray analysis. BMC Nephrol 2016; 17:128. [PMID: 27613243 PMCID: PMC5016939 DOI: 10.1186/s12882-016-0343-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 09/01/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND This study sought to investigate crucial genes correlated with diabetic nephropathy (DN), and their potential functions, which might contribute to a better understanding of DN pathogenesis. METHODS The microarray dataset GSE1009 was downloaded from Gene Expression Omnibus, including 3 diabetic glomeruli samples and 3 healthy glomeruli samples. The differentially expressed genes (DEGs) were identified by LIMMA package. Their potential functions were then analyzed by the GO and KEGG pathway enrichment analyses using the DAVID database. Furthermore, miRNAs and transcription factors (TFs) regulating DEGs were predicted by the GeneCoDis tool, and miRNA-DEG-TF regulatory network was visualized by Cytoscape. Additionally, the expression of DEGs was validated using another microarray dataset GSE30528. RESULTS Totally, 14 up-regulated DEGs and 430 down-regulated ones were identified. Some DEGs (e.g. MTSS1, CALD1 and ACTN4) were markedly relative to cytoskeleton organization. Besides, some other ones were correlated with arrhythmogenic right ventricular cardiomyopathy (e.g. ACTN4, CTNNA1 and ITGB5), as well as complement and coagulation cascades (e.g. C1R and C1S). Furthermore, a series of miRNAs and TFs modulating DEGs were identified. The transcription factor LEF1 regulated the majority of DEGs, such as ITGB5, CALD1 and C1S. Hsa-miR-33a modulated 28 genes, such as C1S. Additionally, 143 DEGs (one upregulated gene and 142 downregulated genes) were also differentially expressed in another dataset GSE30528. CONCLUSIONS The genes involved in cytoskeleton organization, cardiomyopathy, as well as complement and coagulation cascades may be closely implicated in the progression of DN, via the regulation of miRNAs and TFs.
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Affiliation(s)
- Zhikui Wang
- Department of Nephrology, Linyi People's Hospital, No.27 Jiefang Road, Lanshan District, Linyi, Shandong, 276003, China
| | - Zhaoxia Wang
- Department of Nephrology, Linyi People's Hospital, No.27 Jiefang Road, Lanshan District, Linyi, Shandong, 276003, China.
| | - Zhongqi Zhou
- Department of Nephrology, Linyi People's Hospital, No.27 Jiefang Road, Lanshan District, Linyi, Shandong, 276003, China
| | - Yueqin Ren
- Department of Nephrology, Linyi People's Hospital, No.27 Jiefang Road, Lanshan District, Linyi, Shandong, 276003, China
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27
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Acun T, Demir K, Oztas E, Arango D, Yakicier MC. PTPRD is homozygously deleted and epigenetically downregulated in human hepatocellular carcinomas. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2016; 19:220-9. [PMID: 25831062 DOI: 10.1089/omi.2015.0010] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PTPRD (protein tyrosine phosphatase, receptor type, D) is a tumor suppressor gene, frequently inactivated through deletions or epigenetic mechanisms in several cancers with importance for global health. In this study, we provide new and functionally integrated evidence on genetic and epigenetic alterations of PTPRD gene in hepatocellular carcinomas (HCCs). Importantly, HCC is the sixth most common malignancy and the third most common cause of cancer-related mortality worldwide. We used a high throughput single nucleotide polymorphism (SNP) microarray assay (Affymetrix, 10K2.0 Assay) covering the whole genome to screen an extensive panel of HCC cell lines (N=14 in total) to detect DNA copy number changes. PTPRD expression was determined in human HCCs by Q-RT-PCR and immunohistochemistry. Promoter hypermethylation was assessed by combined bisulfite restriction analysis (COBRA). DNA methyl transferase inhibitor 5-azacytidine (5-AzaC) and/or histone deacetylase inhibitor Trichostain A (TSA) were used to restore the expression. We identified homozygous deletions in Mahlavu and SNU475 cells, in the 5'UTR and coding regions, respectively. PTPRD mRNA expression was downregulated in 78.5% of cell lines and 82.6% of primary HCCs. PTPRD protein expression was also found to be lost or reduced in HCC tumor tissues. We found promoter hypermethylation in 22.2% of the paired HCC samples and restored PTPRD expression by 5-AzaC and/or TSA treatments. In conclusion, PTPRD is homozygously deleted and epigenetically downregulated in HCCs. We hypothesize PTPRD as a tumor suppressor candidate and potential cancer biomarker in human HCCs. This hypothesis is consistent with compelling evidences in other organ systems, as discussed in this article. Further functional assays in larger samples may ascertain the contribution of PTPRD to hepatocarcinogenesis in greater detail, not to forget its broader importance for diagnostic medicine and the emerging field of personalized medicine in oncology.
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Affiliation(s)
- Tolga Acun
- 1 Department of Molecular Biology and Genetics, Bülent Ecevit University , Zonguldak, Turkey
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28
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Guo Y, Ren MS, Shang C, Zhu L, Zhong M. MTSS1 gene regulated by miR-96 inhibits cell proliferation and metastasis in tongue squamous cellular carcinoma Tca8113 cell line. Int J Clin Exp Med 2015; 8:15441-15449. [PMID: 26629033 PMCID: PMC4658922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 09/07/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Metastasis suppressor-1 (MTSS1) is a novel potential metastasis suppressor gene in several types of human cancers. However, the exact function and regulatory mechanism of MTSS1 in Tongue squamous cellular carcinoma (TSCC) have not been elucidated. MATERIAL/METHODS We first confirmed the MTSS1 gene expression by using quantitative real time-PCR (qRT-PCR) and immunohistochemical staining. Then we detected the effect of MTSS1 gene on Tca8113 cells proliferation and invasion ability by using MTT, wound healing and invasion assay. Finally by using bioinformatics analysis, luciferase reporter assay and a serial method, we analyzed the targeting of miR-96 on MTSS1 and the ability of miR-96 on MTSS1 gene mediated biological alterations in Tca8113 cells. RESULTS Our findings showed that the expression of MTSS1 was down-regulated in both TSCC tissues and Tca8113 cells. Forced expression of MTSS1 led to inhibited cell proliferation ability, retarded wound closing and reduced trans-membrane cell numbers. MiR-96 is confirmed to be a direct target of MTSS1 gene and could regulate MTSS1 mediated Tca8113 cells proliferation and metastasis. But miR-96 could not completely restore the invasion ability of Tca8113 cells. CONCLUSIONS MiR-96 targeting and promoting MTSS1 repression may precipitate in the TSCC tumorigenesis through bypassing cell proliferation and metastasis control.
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Affiliation(s)
- Yan Guo
- Key Laboratory of Liaoning Province Oral Disease, School of Stomatology, China Medical UniversityShenyang 110002, P. R. China
| | - Mei-Si Ren
- Department of Pathology, School of Stomatology, China Medical UniversityShenyang 110002, P. R. China
| | - Chao Shang
- Department of Neurobiology, China Medical UniversityShenyang 110001, P. R. China
| | - Li Zhu
- Key Laboratory of Liaoning Province Oral Disease, School of Stomatology, China Medical UniversityShenyang 110002, P. R. China
| | - Ming Zhong
- Key Laboratory of Liaoning Province Oral Disease, School of Stomatology, China Medical UniversityShenyang 110002, P. R. China
- Department of Pathology, School of Stomatology, China Medical UniversityShenyang 110002, P. R. China
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LIU RONG, MARTIN TRACEYA, JORDAN NICOLAJ, RUGE FIONA, YE LIN, JIANG WENG. Metastasis suppressor 1 expression in human ovarian cancer: The impact on cellular migration and metastasis. Int J Oncol 2015; 47:1429-39. [DOI: 10.3892/ijo.2015.3121] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 05/26/2015] [Indexed: 11/05/2022] Open
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30
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Missing-in-Metastasis regulates cell motility and invasion via PTPδ-mediated changes in SRC activity. Biochem J 2015; 465:89-101. [PMID: 25287652 DOI: 10.1042/bj20140573] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
MIM (Missing-in-Metastasis), also known as MTSS1 (metastasis suppressor 1), is a scaffold protein that is down-regulated in multiple metastatic cancer cell lines compared with non-metastatic counterparts. MIM regulates cytoskeletal dynamics and actin polymerization, and has been implicated in the control of cell motility and invasion. MIM has also been shown to bind to a receptor PTP (protein tyrosine phosphatase), PTPδ, an interaction that may provide a link between tyrosine-phosphorylation-dependent signalling and metastasis. We used shRNA-mediated gene silencing to investigate the consequences of loss of MIM on the migration and invasion of the MCF10A mammary epithelial cell model of breast cancer. We observed that suppression of MIM by RNAi enhanced migration and invasion of MCF10A cells, effects that were associated with increased levels of PTPδ. Furthermore, analysis of human clinical data indicated that PTPδ was elevated in breast cancer samples when compared with normal tissue. We demonstrated that the SRC protein tyrosine kinase is a direct substrate of PTPδ and, upon suppression of MIM, we observed changes in the phosphorylation status of SRC; in particular, the inhibitory site (Tyr527) was hypophosphorylated, whereas the activating autophosphorylation site (Tyr416) was hyperphosphorylated. Thus the absence of MIM led to PTPδ-mediated activation of SRC. Finally, the SRC inhibitor SU6656 counteracted the effects of MIM suppression on cell motility and invasion. The present study illustrates that both SRC and PTPδ have the potential to be therapeutic targets for metastatic tumours associated with loss of MIM.
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31
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Downregulation of MTSS1 expression is an independent prognosticator in squamous cell carcinoma of the lung. Br J Cancer 2015; 112:866-73. [PMID: 25625275 PMCID: PMC4453956 DOI: 10.1038/bjc.2015.2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/22/2014] [Indexed: 12/29/2022] Open
Abstract
Background: The metastasis suppressor 1 (MTSS1) is a newly discovered protein putatively involved in tumour progression and metastasis. Material and Methods: Immunohistochemical expression of MTSS1 was analysed in 264 non-small-cell lung carcinomas (NSCLCs). Results: The metastasis suppressor 1 was significantly overexpressed in NSCLC compared with normal lung (P=0.01). Within NSCLC, MTSS1 expression was inversely correlated with pT-stage (P=0.019) and histological grading (P<0.001). NSCLC with MTSS1 downregulation (<20%) showed a significantly worse outcome (P=0.007). This proved to be an independent prognostic factor in squamous cell carcinomas (SCCs; P=0.041), especially in early cancer stages (P=0.006). Conclusion: The metastasis suppressor 1 downregulation could thus serve as a stratifying marker for adjuvant therapy in early-stage SCC of the lung.
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Zhong J, Shaik S, Wan L, Tron AE, Wang Z, Sun L, Inuzuka H, Wei W. SCF β-TRCP targets MTSS1 for ubiquitination-mediated destruction to regulate cancer cell proliferation and migration. Oncotarget 2014; 4:2339-53. [PMID: 24318128 PMCID: PMC3926831 DOI: 10.18632/oncotarget.1446] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Metastasis suppressor 1 (MTSS1) is an important tumor suppressor protein, and loss of MTSS1 expression has been observed in several types of human cancers. Importantly, decreased MTSS1 expression is associated with more aggressive forms of breast and prostate cancers, and with poor survival rate. Currently, it remains unclear how MTSS1 is regulated in cancer cells, and whether reduced MTSS1 expression contributes to elevated cancer cell proliferation and migration. Here we report that the SCFβ-TRCP regulates MTSS1 protein stability by targeting it for ubiquitination and subsequent destruction via the 26S proteasome. Notably, depletion of either Cullin 1 or β-TRCP1 led to increased levels of MTSS1. We further demonstrated a crucial role for Ser322 in the DSGXXS degron of MTSS1 in governing SCFβ-TRCP-mediated MTSS1 degradation. Mechanistically, we defined that Casein Kinase Iδ (CKIδ) phosphorylates Ser322 to trigger MTSS1's interaction with β-TRCP for subsequent ubiquitination and degradation. Importantly, introducing wild-type MTSS1 or a non-degradable MTSS1 (S322A) into breast or prostate cancer cells with low MTSS1 expression significantly inhibited cellular proliferation and migration. Moreover, S322A-MTSS1 exhibited stronger effects in inhibiting cell proliferation and migration when compared to ectopic expression of wild-type MTSS1. Therefore, our study provides a novel molecular mechanism for the negative regulation of MTSS1 by β-TRCP in cancer cells. It further suggests that preventing MTSS1 degradation could be a possible novel strategy for clinical treatment of more aggressive breast and prostate cancers.
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Affiliation(s)
- Jiateng Zhong
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
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33
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Zhao S, Sedwick D, Wang Z. Genetic alterations of protein tyrosine phosphatases in human cancers. Oncogene 2014; 34:3885-94. [PMID: 25263441 PMCID: PMC4377308 DOI: 10.1038/onc.2014.326] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 08/20/2014] [Accepted: 08/21/2014] [Indexed: 12/12/2022]
Abstract
Protein tyrosine phosphatases (PTPs) are enzymes that remove phosphate from tyrosine residues in proteins. Recent whole-exome sequencing of human cancer genomes reveals that many PTPs are frequently mutated in a variety of cancers. Among these mutated PTPs, protein tyrosine phosphatase T (PTPRT) appears to be the most frequently mutated PTP in human cancers. Beside PTPN11 which functions as an oncogene in leukemia, genetic and functional studies indicate that most of mutant PTPs are tumor suppressor genes. Identification of the substrates and corresponding kinases of the mutant PTPs may provide novel therapeutic targets for cancers harboring these mutant PTPs.
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Affiliation(s)
- S Zhao
- 1] Division of Gastroenterology and Hepatology and Shanghai Institution of Digestive Disease, Shanghai Jiao-Tong University School of Medicine Renji Hospital, Shanghai, China [2] Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA [3] Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA
| | - D Sedwick
- 1] Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA [2] Department of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Z Wang
- 1] Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA [2] Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA
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Methods of Cell Propulsion through the Local Stroma in Breast Cancer. Int J Breast Cancer 2014; 2014:197480. [PMID: 24808960 PMCID: PMC3997937 DOI: 10.1155/2014/197480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 03/18/2014] [Indexed: 01/08/2023] Open
Abstract
In the normal breast, cellular structures change cyclically in response to ovarian hormones. Cell proliferation, apoptosis, invasion, and differentiation are integral processes that are precisely regulated. Normal epithelial cells depend on the formation of intercellular adhesion contacts to form a continuous sheet of stratifying cell layers that are attached to one and other horizontally and vertically.
Cells migrate by extending membrane protrusions to explore the extracellular space locating their targets in a chemotactic manner. The formation of cell protrusions is driven by the assembly of actin filaments at the leading edge. Reorganisation is regulated by a highly integrated signalling cascade that transduces extracellular stimuli to the actin filaments. This signalling cascade is governed by GTPases which act as molecular switches leading to actin polymerisation and the formation of filopodia and lamellipodia. This process is linked to downstream molecules known collectively as WASP proteins, which, in the presence of cortactin, form a complex leading to nucleation and formation of branched filaments. In breast cancer, the cortactin is over expressed leading to increased cellular motility and invasiveness. This hugely complex and integrated signalling cascade transduces extracellular stimuli. There are multiple genes related to cell motility which are dysregulated in human breast cancers.
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LAR-RPTPs: synaptic adhesion molecules that shape synapse development. Trends Cell Biol 2013; 23:465-75. [DOI: 10.1016/j.tcb.2013.07.004] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 07/07/2013] [Accepted: 07/08/2013] [Indexed: 12/21/2022]
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Zeng XC, Luo X, Wang SX, Zhan X. Fibronectin-mediated cell spreading requires ABBA-Rac1 signaling. J Cell Biochem 2013; 114:773-81. [PMID: 23060091 DOI: 10.1002/jcb.24415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Accepted: 09/28/2012] [Indexed: 11/11/2022]
Abstract
ABBA was reported to be an actin dynamics regulator. However, the molecular mechanism of action of ABBA is still totally obscure. Here, we show that ABBA is ubiquitously expressed in all the examined cultured cells. We found that expression of ABBA in NIH3T3 cells promotes cell spreading. ABBA binds to and markedly promotes cell spreading-induced Rac1 activation. Cell spreading stimulates ABBA activation probably by inducing it tyrosine phosphorylation, which endows ABBA much higher activity to activate Rac1, and attenuates the interaction between ABBA and Rac1. Loss of function suggests that deletion of ABBA in C6-R cells markedly inhibits Rac1 activation and cell spreading; this suggests that and the interaction between ABBA and activated Rac1 is required for ABBA-promoted cell spreading. Taken together, our results indicate that ABBA is activated in response to cell spreading, which markedly promotes cell spreading, and ABBA is required for Rac1 activation and cell spreading.
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Affiliation(s)
- Xian-Chun Zeng
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China.
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Sousounis K, Looso M, Maki N, Ivester CJ, Braun T, Tsonis PA. Transcriptome analysis of newt lens regeneration reveals distinct gradients in gene expression patterns. PLoS One 2013; 8:e61445. [PMID: 23613853 PMCID: PMC3628982 DOI: 10.1371/journal.pone.0061445] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 03/09/2013] [Indexed: 12/11/2022] Open
Abstract
Regeneration of the lens in newts is quite a unique process. The lens is removed in its entirety and regeneration ensues from the pigment epithelial cells of the dorsal iris via transdifferentiation. The same type of cells from the ventral iris are not capable of regenerating a lens. It is, thus, expected that differences between dorsal and ventral iris during the process of regeneration might provide important clues pertaining to the mechanism of regeneration. In this paper, we employed next generation RNA-seq to determine gene expression patterns during lens regeneration in Notophthalmus viridescens. The expression of more than 38,000 transcripts was compared between dorsal and ventral iris. Although very few genes were found to be dorsal- or ventral-specific, certain groups of genes were up-regulated specifically in the dorsal iris. These genes are involved in cell cycle, gene regulation, cytoskeleton and immune response. In addition, the expression of six highly regulated genes, TBX5, FGF10, UNC5B, VAX2, NR2F5, and NTN1, was verified using qRT-PCR. These graded gene expression patterns provide insight into the mechanism of lens regeneration, the markers that are specific to dorsal or ventral iris, and layout a map for future studies in the field.
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Affiliation(s)
- Konstantinos Sousounis
- Department of Biology and Center for Tissue Regeneration and Engineering at Dayton, University of Dayton, Dayton, Ohio, United States of America
| | - Mario Looso
- Department of Bioinformatics, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Nobuyasu Maki
- Department of Biology and Center for Tissue Regeneration and Engineering at Dayton, University of Dayton, Dayton, Ohio, United States of America
| | - Clifford J. Ivester
- Department of Biology and Center for Tissue Regeneration and Engineering at Dayton, University of Dayton, Dayton, Ohio, United States of America
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
- * E-mail: (TB); (PAT)
| | - Panagiotis A. Tsonis
- Department of Biology and Center for Tissue Regeneration and Engineering at Dayton, University of Dayton, Dayton, Ohio, United States of America
- * E-mail: (TB); (PAT)
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Suppression of MIM by microRNA-182 activates RhoA and promotes breast cancer metastasis. Oncogene 2013; 33:1287-96. [DOI: 10.1038/onc.2013.65] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 12/18/2012] [Accepted: 01/05/2013] [Indexed: 02/07/2023]
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Abstract
MIM [missing in metastasis; also called MTSS1 (metastasis suppressor 1)] is an intracellular protein that binds to actin and cortactin and has an intrinsic capacity to sense and facilitate the formation of protruded membranous curvatures implicated in cellular polarization, mobilization and endocytosis. The N-terminal 250 amino acids of MIM undergo homodimerization and form a structural module with the characteristic of an I-BAR [inverse BAR (Bin/amphiphysin/Rvs)] domain. To discern the role of the dimeric configuration in the function of MIM, we designed several peptides able to interfere with MIM dimerization in a manner dependent upon their lengths. Overexpression of one of the peptides effectively abolished MIM-mediated membrane protrusions and transferrin uptake. However, a peptide with a high potency inhibiting MIM dimerization failed to affect its binding to actin and cortactin. Thus the results of the present study indicate that the dimeric configuration is essential for MIM-mediated membrane remodelling and serves as a proper target to develop antagonists specifically against an I-BAR-domain-containing protein.
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Abstract
Endocytosis includes a number of processes by which cells internalize segments of their plasma membrane, enclosing a wide variety of material from outside the cell. Endocytosis can contribute to uptake of nutrients, regulation of signaling molecules, control of osmotic pressure, and function of synapses. The actin cytoskeleton plays an essential role in several of these processes. Actin assembly can create protrusions that encompass extracellular materials. Actin can also support the processes of invagination of a membrane segment into the cytoplasm, elongation of the invagination, scission of the new vesicle from the plasma membrane, and movement of the vesicle away from the membrane. We briefly discuss various types of endocytosis, including phagocytosis, macropinocytosis, and clathrin-independent endocytosis. We focus mainly on new findings on the relative importance of actin in clathrin-mediated endocytosis (CME) in yeast versus mammalian cells.
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Affiliation(s)
- Olivia L Mooren
- Department of Cell Biology and Physiology, Washington University School of Medicine, Saint Louis, Missouri 63110, USA.
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41
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Wang J, Li J, Shen J, Wang C, Yang L, Zhang X. MicroRNA-182 downregulates metastasis suppressor 1 and contributes to metastasis of hepatocellular carcinoma. BMC Cancer 2012; 12:227. [PMID: 22681717 PMCID: PMC3492170 DOI: 10.1186/1471-2407-12-227] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 06/01/2012] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND miR-182 is one of the most significantly up-regulated miRNAs in hepatocellular carcinoma (HCC). Metastasis suppressor 1 (MTSS1), one target gene of miR-182, plays an important role in the metastasis of cancers. However, it remains unclear what role does function and mechanism of miR-182 and MTSS1play in HCC. METHODS miR-182 expression was tested in 86 cases of paired HCC and normal tissues by real-time PCR and the relationships between miR-182 expression and clinicopathological parameters were analyzed. The expression of MTSS1 was evaluated by immunohistochemistry and western blot in the above tissues and its correlation with miR-182 expression was analyzed. Moreover, western blot and invasion assays were performed after transfection of pre-miR-182 or anti-miR-182 to HCC cell lines. In addition, luciferase assays was performed to confirm the regulation of miR-182 on MTSS1. RESULTS Compared with normal tissue, miR-182 was up-regulated and MTSS1 was down-regulated in HCC tissues. Moreover, the over-expression of miR-182 was correlated with intrahepatic metastasis (p = 0.034) and poor prognosis (p = 0.039) of HCC patients. There was a negative correlation between miR-182 and MTSS1 expression in both HCC tissues (r = -0.673, p < 0.01) and HCC cell lines (r = -0.931, p = 0.021). Furthermore, the up-regulation of miR-182 resulted in the down-regulation of MTSS1 and increased invasive potential of HUH-1, and reverse results were also confirmed when the expression of miR-182 was inhibited. In addition, the results of the luciferase assay demonstrated the targeted regulation of miR-182 on MTSS1. CONCLUSIONS miR-182 could promote metastasis of HCC and inhibit the expression of MTSS1. miR-182 and MTSS1 are potential prognostic markers and/or therapeutic targets in HCC.
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Affiliation(s)
- Jian Wang
- Department of 4th Abdominal Oncology, Cancer Hospital and Institute of Tianjin Medical University, Tianjin, 300060, China.
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Clark O, Schmidt F, Coles CH, Tchetchelnitski V, Stoker AW. Functional Analysis of the Putative Tumor Suppressor PTPRD in Neuroblastoma Cells. Cancer Invest 2012; 30:422-32. [DOI: 10.3109/07357907.2012.675383] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- O. Clark
- Neural Development Unit, UCL Institute of Child Health, University College London,
London, UK,1
| | - F. Schmidt
- MERCK SERONO S.A.,
Geneve, Switzerland,2
| | - C. H. Coles
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford,
Oxford, UK3
| | - V. Tchetchelnitski
- Neural Development Unit, UCL Institute of Child Health, University College London,
London, UK,1
| | - A. W. Stoker
- Neural Development Unit, UCL Institute of Child Health, University College London,
London, UK,1
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43
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Dawson JC, Timpson P, Kalna G, Machesky LM. Mtss1 regulates epidermal growth factor signaling in head and neck squamous carcinoma cells. Oncogene 2012; 31:1781-93. [PMID: 21927027 PMCID: PMC3245856 DOI: 10.1038/onc.2011.376] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 07/13/2011] [Accepted: 07/22/2011] [Indexed: 12/11/2022]
Abstract
Mtss1 is located within chromosomal region 8q23-24, which is one of the three most commonly amplified regions in head and neck squamous cell carcinoma (HNSCC). Mtss1 is lost in metastatic cells, but confusingly is commonly overexpressed in primary tumors. Here we address possible reasons why Mtss1 is positively selected for in primary tumors. We find that Mtss1 enhances the localization of the epidermal growth factor (EGF) receptor to the plasma membrane, prolonging EGF signaling and resulting in enhanced proliferation in HNSCC. Depletion of Mtss1 results in decreased EGF receptor levels and decreased phosphorylation of Erk1/2 and Akt. However, when cells are at high density and adherent to each other, analogous to conditions in a solid tumor, Mtss1 does not confer any growth advantage, either in basal conditions or following EGF stimulation. This could indicate why Mtss1 might be lost in metastases, but preserved in early primary tumors. This is supported by an organotypic assay showing that Mtss1-expressing cells display a less proliferative more epithelial-like morphology on top of a collagen matrix. Furthermore, xenograft tumors expressing Mtss1 initially grow more rapidly, but later show less proliferation and more differentiation. Mtss1 positively modulates EGF signaling at low cell densities to promote proliferation and, therefore, may be beneficial for the early stages of primary HNSCC tumor growth. However, at high cell densities, Mtss1 impacts negatively on EGF signaling and this suggests why it inhibits metastasis.
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Affiliation(s)
- John C. Dawson
- Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, Scotland, UK
| | - Paul Timpson
- Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, Scotland, UK
| | - Gabriela Kalna
- Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, Scotland, UK
| | - Laura M. Machesky
- Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Bearsden, Glasgow G61 1BD, Scotland, UK
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Maddugoda MP, Stefani C, Gonzalez-Rodriguez D, Saarikangas J, Torrino S, Janel S, Munro P, Doye A, Prodon F, Aurrand-Lions M, Goossens PL, Lafont F, Bassereau P, Lappalainen P, Brochard F, Lemichez E. cAMP signaling by anthrax edema toxin induces transendothelial cell tunnels, which are resealed by MIM via Arp2/3-driven actin polymerization. Cell Host Microbe 2012; 10:464-74. [PMID: 22100162 DOI: 10.1016/j.chom.2011.09.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 07/19/2011] [Accepted: 09/14/2011] [Indexed: 12/22/2022]
Abstract
RhoA-inhibitory bacterial toxins, such as Staphylococcus aureus EDIN toxin, induce large transendothelial cell macroaperture (TEM) tunnels that rupture the host endothelium barrier and promote bacterial dissemination. Host cells repair these tunnels by extending actin-rich membrane waves from the TEM edges. We reveal that cyclic-AMP signaling produced by Bacillus anthracis edema toxin (ET) also induces TEM formation, which correlates with increased vascular permeability. We show that ET-induced TEM formation resembles liquid dewetting, a physical process of nucleation and growth of holes within a thin liquid film. We also identify the cellular mechanisms of tunnel closure and reveal that the I-BAR domain protein Missing in Metastasis (MIM) senses de novo membrane curvature generated by the TEM, accumulates at the TEM edge, and triggers Arp2/3-dependent actin polymerization, which induces actin-rich membrane waves that close the TEM. Thus, the balance between ET-induced TEM formation and resealing likely determines the integrity of the host endothelium barrier.
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Affiliation(s)
- Madhavi P Maddugoda
- INSERM, U, Université de Nice-Sophia-Antipolis, Centre Méditerranéen de Médecine Moléculaire, Nice, France
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45
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Meehan M, Parthasarathi L, Moran N, Jefferies CA, Foley N, Lazzari E, Murphy D, Ryan J, Ortiz B, Fabius AWM, Chan TA, Stallings RL. Protein tyrosine phosphatase receptor delta acts as a neuroblastoma tumor suppressor by destabilizing the aurora kinase A oncogene. Mol Cancer 2012; 11:6. [PMID: 22305495 PMCID: PMC3395855 DOI: 10.1186/1476-4598-11-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Accepted: 02/05/2012] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Protein tyrosine phosphatase receptor delta (PTPRD) is a member of a large family of protein tyrosine phosphatases which negatively regulate tyrosine phosphorylation. Neuroblastoma is a major childhood cancer arising from precursor cells of the sympathetic nervous system which is known to acquire deletions and alterations in the expression patterns of PTPRD, indicating a potential tumor suppressor function for this gene. The molecular mechanism, however, by which PTPRD renders a tumor suppressor effect in neuroblastoma is unknown. RESULTS As a molecular mechanism, we demonstrate that PTPRD interacts with aurora kinase A (AURKA), an oncogenic protein that is over-expressed in multiple forms of cancer, including neuroblastoma. Ectopic up-regulation of PTPRD in neuroblastoma dephosphorylates tyrosine residues in AURKA resulting in a destabilization of this protein culminating in interfering with one of AURKA's primary functions in neuroblastoma, the stabilization of MYCN protein, the gene of which is amplified in approximately 25 to 30% of high risk neuroblastoma. CONCLUSIONS PTPRD has a tumor suppressor function in neuroblastoma through AURKA dephosphorylation and destabilization and a downstream destabilization of MYCN protein, representing a novel mechanism for the function of PTPRD in neuroblastoma.
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Affiliation(s)
- Maria Meehan
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, Dublin 2, Dublin, Ireland
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46
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Yu D, Zhan XH, Zhao XF, Williams MS, Carey GB, Smith E, Scott D, Zhu J, Guo Y, Cherukuri S, Civin CI, Zhan X. Mice deficient in MIM expression are predisposed to lymphomagenesis. Oncogene 2011; 31:3561-8. [PMID: 22081072 DOI: 10.1038/onc.2011.509] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Missing in metastasis (MIM) is a member of newly emerged inverse Bin-Amphiphysin-Rvs (BAR) domain protein family and a putative metastasis suppressor. Although reduced MIM expression has been associated with bladder, breast and gastric cancers, evidence for the role of MIM in tumor progression remains scarce and controversial. Herein we characterized a MIM knockout mouse strain and observed that MIM-deficient mice often developed enlarged spleens. Autopsy and histological analysis revealed that nearly 78% of MIM(-/-) mice developed tumors with features similar to diffuse large B lymphoma during a period from 1 to 2 years. MIM(-/-) mice also exhibited abnormal distribution of B cells in lymphoid organs with decrease in the spleen but increase in the bone marrow and the peripheral blood. Furthermore, the bone marrow of MIM(-/-) mice contained a higher percentage of pre-B2 cells but fewer immature B-cells than wild-type mice. In response to CXCL13, a B-cell chemokine released from splenic stromal cells, MIM-deficient B-cells did not undergo chemotaxis or morphological changes in response to the chemokine and also did not internalize CXCR5, the receptor of CXCL13. Microarray analyses demonstrated that MIM is the only member of the I-BAR domain family that was highly expressed in human B cells. However, low or absent MIM expression was common in either primary B-cell malignancies or established B-cell acute lymphocytic leukemia or lymphomas. Thus, our data demonstrate for the first time an important role for MIM in B-cell development and suggest that predisposition of MIM-null mice to lymphomagenesis may involve aberrant interactions between B lineage cells and the lymphoid microenvironment.
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Affiliation(s)
- D Yu
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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Ulbrich C, Pietsch J, Grosse J, Wehland M, Schulz H, Saar K, Hübner N, Hauslage J, Hemmersbach R, Braun M, van Loon J, Vagt N, Egli M, Richter P, Einspanier R, Sharbati S, Baltz T, Infanger M, Ma X, Grimm D. Differential gene regulation under altered gravity conditions in follicular thyroid cancer cells: relationship between the extracellular matrix and the cytoskeleton. Cell Physiol Biochem 2011; 28:185-98. [PMID: 21865726 DOI: 10.1159/000331730] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/11/2011] [Indexed: 12/19/2022] Open
Abstract
Extracellular matrix proteins, adhesion molecules, and cytoskeletal proteins form a dynamic network interacting with signalling molecules as an adaptive response to altered gravity. An important issue is the exact differentiation between real microgravity responses of the cells or cellular reactions to hypergravity and/or vibrations. To determine the effects of real microgravity on human cells, we used four DLR parabolic flight campaigns and focused on the effects of short-term microgravity (22 s), hypergravity (1.8 g), and vibrations on ML-1 thyroid cancer cells. No signs of apoptosis or necrosis were detectable. Gene array analysis revealed 2,430 significantly changed transcripts. After 22 s microgravity, the F-actin and cytokeratin cytoskeleton was altered, and ACTB and KRT80 mRNAs were significantly upregulated after the first and thirty-first parabolas. The COL4A5 mRNA was downregulated under microgravity, whereas OPN and FN were significantly upregulated. Hypergravity and vibrations did not change ACTB, KRT-80 or COL4A5 mRNA. MTSS1 and LIMA1 mRNAs were downregulated/slightly upregulated under microgravity, upregulated in hypergravity and unchanged by vibrations. These data indicate that the graviresponse of ML-1 cells occurred very early, within the first few seconds. Downregulated MTSS1 and upregulated LIMA1 may be an adaptive mechanism of human cells for stabilizing the cytoskeleton under microgravity conditions.
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Affiliation(s)
- Claudia Ulbrich
- Institute of Clinical Pharmacology and Toxicology, Charité-Universitätsmedizin Berlin, Berlin, Germany
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Hayn-Leichsenring G, Liebig C, Miething A, Schulz A, Kumar S, Schwalbe M, Eiberger B, Baader S. Cellular distribution of metastasis suppressor 1 and the shape of cell bodies are temporarily altered in Engrailed-2 overexpressing cerebellar Purkinje cells. Neuroscience 2011; 189:68-78. [DOI: 10.1016/j.neuroscience.2011.05.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 05/05/2011] [Accepted: 05/16/2011] [Indexed: 02/07/2023]
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49
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Pykäläinen A, Boczkowska M, Zhao H, Saarikangas J, Rebowski G, Jansen M, Hakanen J, Koskela EV, Peränen J, Vihinen H, Jokitalo E, Salminen M, Ikonen E, Dominguez R, Lappalainen P. Pinkbar is an epithelial-specific BAR domain protein that generates planar membrane structures. Nat Struct Mol Biol 2011; 18:902-7. [PMID: 21743456 DOI: 10.1038/nsmb.2079] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Accepted: 05/05/2011] [Indexed: 12/16/2022]
Abstract
Bin/amphipysin/Rvs (BAR)-domain proteins sculpt cellular membranes and have key roles in processes such as endocytosis, cell motility and morphogenesis. BAR domains are divided into three subfamilies: BAR- and F-BAR-domain proteins generate positive membrane curvature and stabilize cellular invaginations, whereas I-BAR-domain proteins induce negative curvature and stabilize protrusions. We show that a previously uncharacterized member of the I-BAR subfamily, Pinkbar, is specifically expressed in intestinal epithelial cells, where it localizes to Rab13-positive vesicles and to the plasma membrane at intercellular junctions. Notably, the BAR domain of Pinkbar does not induce membrane tubulation but promotes the formation of planar membrane sheets. Structural and mutagenesis analyses reveal that the BAR domain of Pinkbar has a relatively flat lipid-binding interface and that it assembles into sheet-like oligomers in crystals and in solution, which may explain its unique membrane-deforming activity.
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Affiliation(s)
- Anette Pykäläinen
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
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Wang D, Xu MR, Wang T, Li T, Zhu JW. MTSS1 overexpression correlates with poor prognosis in colorectal cancer. J Gastrointest Surg 2011; 15:1205-12. [PMID: 21562916 DOI: 10.1007/s11605-011-1546-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Accepted: 04/18/2011] [Indexed: 01/31/2023]
Abstract
BACKGROUND The aims of this study were to investigate metastasis suppressor 1 (MTSS1) expression in benign and malignant colorectal tissues and to explore its significance in the prognosis of colorectal cancer (CRC) patients. METHODS MTSS1 expression was detected by immunohistochemistry in CRC, colorectal adenomatous polyp (precancerous lesion) and normal colorectal tissues. The relationship between MTSS1 expression in CRC tissues and clinicopathologic factors was analyzed with Mann-Whitney U test. MTSS1 protein expression was observed by Western blot in CRC tissues and adjacent nontumor colorectal tissues. Two factors between MTSS1 expression and CRC patient tumor node metastasis (TNM) stage were analyzed by Spearman rank correlation analysis. The Kaplan-Meier method and log-rank test were employed to compare the overall survival between MTSS1 negative/weak positive expression group and MTSS1 strong positive expression group. RESULTS MTSS1 expression rates were significantly higher in CRC tissues (99 out of 135, 73.30%) than that in normal colorectal tissues (one out of seven, 14.29%), nontumor colorectal tissues (six out of 32, 18.75%), and adenomatous polyp tissues (four out of 15, 26.67%; P = 0.003, P < 0.001, P = 0.001, respectively). The upregulated MTSS1 expression in CRC tissues was significantly correlated to poor differentiation (P = 0.005), tissue invasion (P = 0.018), high preoperative CEA level (P = 0.022), present lymph node metastasis (P = 0.003), and high TNM stage (P = 0.002). MTSS1 expression was positively correlated with clinical TNM stage, that suggested the more advanced clinical TNM stage corresponding to the higher expression level of MTSS1 (r(s) = 0.327, P < 0.05). Western blotting demonstrated that MTSS1 expression was upregulated in 25 of 32 CRC tissues (75.0%) compared to corresponding adjacent nontumor colorectal tissues. The overall 5-year survival of MTSS1 strong positive expression CRC patients was significantly shorter than that of MTSS1 negative and weakly positive expression group. In multivariate analysis, MTSS1 expression maintained independent prognostic influence on overall survival (P = 0.004). CONCLUSION MTSS1 may be a good biomarker to be applied in the clinical setting to predict the prognosis of CRC patients with completely resected.
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Affiliation(s)
- Ding Wang
- Department of General Surgery, The Affiliated Hospital of Nantong University, No. 20, Xisi Rd, Nantong 226001, People's Republic of China
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