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Shan S, Chatterjee A, Qiu Y, Hammes HP, Wieland T, Feng Y. O-GlcNAcylation of FoxO1 mediates nucleoside diphosphate kinase B deficiency induced endothelial damage. Sci Rep 2018; 8:10581. [PMID: 30002415 PMCID: PMC6043576 DOI: 10.1038/s41598-018-28892-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/26/2018] [Indexed: 12/20/2022] Open
Abstract
Nucleoside diphosphate kinase B (NDPK-B) acts as a protective factor in the retinal vasculature. NDPK-B deficiency leads to retinal vasoregression mimicking diabetic retinopathy (DR). Angiopoetin 2 (Ang-2), an initiator of retinal vasoregression in DR, is upregulated in NDPK-B deficient retinas and in NDPK-B depleted endothelial cells (ECs) in vitro. We therefore investigated the importance of Ang-2 in NDPK-B deficient retinas and characterized the mechanisms of Ang-2 upregulation upon NDPK-B depletion in cultured ECs. The crucial role of retinal Ang-2 in the initiation of vasoregression was verified by crossing NDPK-B deficient with Ang-2 haplodeficient mice. On the molecular level, FoxO1, a transcription factor regulating Ang-2, was upregulated in NDPK-B depleted ECs. Knockdown of FoxO1 abolished the elevation of Ang-2 induced by NDPK-B depletion. Furthermore O-GlcNAcylated FoxO1 was found preferentially in the nucleus. An increased O-GlcNAcylation of FoxO1 was revealed upon NDPK-B depletion. In accordance, the inhibition of protein O-GlcNAcylation normalized NDPK-B depletion induced Ang-2 upregulation. In summary, we demonstrated that the upregulation of Ang-2 upon NDPK-B deficiency is driven by O-GlcNAcylation of FoxO1. Our data provide evidence for a central role of protein O-GlcNAcylation in NDPK-B associated vascular damage and point to the hexosamine pathway as an important target in retinal vasoregression.
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Affiliation(s)
- Shenliang Shan
- Experimental Pharmacology Mannheim (EPM), European Center of Angioscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Anupriya Chatterjee
- Experimental Pharmacology Mannheim (EPM), European Center of Angioscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Yi Qiu
- Experimental Pharmacology Mannheim (EPM), European Center of Angioscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Hans-Peter Hammes
- 5th Medical Clinic, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Thomas Wieland
- Experimental Pharmacology Mannheim (EPM), European Center of Angioscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Mannheim, Germany
| | - Yuxi Feng
- Experimental Pharmacology Mannheim (EPM), European Center of Angioscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
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Abstract
Nucleoside diphosphate kinases (NDPK) are nucleotide metabolism enzymes encoded by NME genes (also called NM23). Given the fact that not all NME-encoded proteins are catalytically active NDPKs and that NM23 generally refers to clinical studies on metastasis, we use here NME/NDPK to denote the proteins. Since their discovery in the 1950's, NMEs/NDPKs have been shown to be involved in multiple physiological and pathological cellular processes, but the molecular mechanisms have not been fully determined. Recent progress in elucidating these underlying mechanisms has been presented by experts in the field at the 10th International Congress on the NDPK/NME/AWD protein family in October 2016 in Dubrovnik, Croatia, and is summarized in review articles or original research in this and an upcoming issue of Laboratory Investigation. Within this editorial, we discuss three major cellular processes that involve members of the multi-functional NME/NDPK family: (i) cancer and metastasis dissemination, (ii) membrane remodeling and nucleotide channeling, and iii) protein histidine phosphorylation.
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Abu-Taha IH, Heijman J, Feng Y, Vettel C, Dobrev D, Wieland T. Regulation of heterotrimeric G-protein signaling by NDPK/NME proteins and caveolins: an update. J Transl Med 2018; 98:190-197. [PMID: 29035382 DOI: 10.1038/labinvest.2017.103] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Revised: 07/17/2017] [Accepted: 07/31/2017] [Indexed: 12/14/2022] Open
Abstract
Heterotrimeric G proteins are pivotal mediators of cellular signal transduction in eukaryotic cells and abnormal G-protein signaling plays an important role in numerous diseases. During the last two decades it has become evident that the activation status of heterotrimeric G proteins is both highly localized and strongly regulated by a number of factors, including a receptor-independent activation pathway of heterotrimeric G proteins that does not involve the classical GDP/GTP exchange and relies on nucleoside diphosphate kinases (NDPKs). NDPKs are NTP/NDP transphosphorylases encoded by the nme/nm23 genes that are involved in a variety of cellular events such as proliferation, migration, and apoptosis. They therefore contribute, for example, to tumor metastasis, angiogenesis, retinopathy, and heart failure. Interestingly, NDPKs are translocated and/or upregulated in human heart failure. Here we describe recent advances in the current understanding of NDPK functions and how they have an impact on local regulation of G-protein signaling.
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Affiliation(s)
- Issam H Abu-Taha
- Institute of Pharmacology, West-German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - Jordi Heijman
- Department of Cardiology, CARIM School for Cardiovascular Disease, Maastricht University, Maastricht, The Netherlands
| | - Yuxi Feng
- Institute of Experimental and Clinical Pharmacology and Toxicology, Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany
| | - Christiane Vettel
- Institute of Experimental and Clinical Pharmacology and Toxicology, Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site, Heidelberg-Mannheim, Germany
| | - Dobromir Dobrev
- Institute of Pharmacology, West-German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - Thomas Wieland
- Institute of Experimental and Clinical Pharmacology and Toxicology, Mannheim Medical Faculty, Heidelberg University, Mannheim, Germany.,DZHK (German Center for Cardiovascular Research), Partner Site, Heidelberg-Mannheim, Germany
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Gross S, Devraj K, Feng Y, Macas J, Liebner S, Wieland T. Nucleoside diphosphate kinase B regulates angiogenic responses in the endothelium via caveolae formation and c-Src-mediated caveolin-1 phosphorylation. J Cereb Blood Flow Metab 2017; 37:2471-2484. [PMID: 27629102 PMCID: PMC5531345 DOI: 10.1177/0271678x16669365] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Nucleoside diphosphate kinase B (NDPK-B) is an enzyme required for nucleoside triphosphate homeostasis, which has been shown to interact with caveolin-1 (Cav-1). In endothelial cells (ECs), NDPK-B contributes to the regulation of angiogenesis and adherens junction (AJ) integrity. We therefore investigated whether an interaction of NDPK-B with Cav-1 in ECs is required for this regulation and the involvement of VEGF signaling herein. We report that simultaneous depletion of NDPK-B/Cav-1 in HUVECs synergistically impaired sprouting angiogenesis. NDPK-B depletion alone impaired caveolae formation, VEGF-induced phosphorylation of c-Src/Cav-1 but not of ERK1/2/AKT/eNOS. In vivo, Cav-1-/- mice showed impaired retinal vascularization at postnatal-day five, whereas NDPK-B-/- mice did not. Primary mouse brain ECs (MBMECs) from NDPK-B-/- mice showed no change in caveolae content and transendothelial-electrical resistance upon VEGF stimulation. Interestingly, NDPK-B-/- MBMECs displayed an accumulation of intracellular vesicles and increased Cav-1 levels. Dextran tracer analysis showed increased vascular permeability in the brain of NDPK-B-/- mice compared to wild type. In conclusion, our data indicate that NDPK-B is required for the correct localization of Cav-1 at the plasma membrane and the formation of caveolae. The genetic ablation of NDPK-B could partially be compensated by an increased Cav-1 content, which restored caveolae formation and some endothelial functions.
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Affiliation(s)
- Shalini Gross
- Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Kavi Devraj
- Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany
| | - Yuxi Feng
- Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Jadranka Macas
- Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany
| | - Stefan Liebner
- Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany
| | - Thomas Wieland
- Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
- Thomas Wieland, Institute of Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, Heidelberg University Maybachstr. 14, 68169 Mannheim, Germany.
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Francois-Moutal L, Ouberai MM, Maniti O, Welland ME, Strzelecka-Kiliszek A, Wos M, Pikula S, Bandorowicz-Pikula J, Marcillat O, Granjon T. Two-Step Membrane Binding of NDPK-B Induces Membrane Fluidity Decrease and Changes in Lipid Lateral Organization and Protein Cluster Formation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12923-12933. [PMID: 27934520 DOI: 10.1021/acs.langmuir.6b03789] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nucleoside diphosphate kinases (NDPKs) are crucial elements in a wide array of cellular physiological or pathophysiological processes such as apoptosis, proliferation, or metastasis formation. Among the NDPK isoenzymes, NDPK-B, a cytoplasmic protein, was reported to be associated with several biological membranes such as plasma or endoplasmic reticulum membranes. Using several membrane models (liposomes, lipid monolayers, and supported lipid bilayers) associated with biophysical approaches, we show that lipid membrane binding occurs in a two-step process: first, initiation by a strong electrostatic adsorption process and followed by shallow penetration of the protein within the membrane. The NDPK-B binding leads to a decrease in membrane fluidity and formation of protein patches. The ability of NDPK-B to form microdomains at the membrane level may be related to protein-protein interactions triggered by its association with anionic phospholipids. Such accumulation of NDPK-B would amplify its effects in functional platform formation and protein recruitment at the membrane.
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Affiliation(s)
- Liberty Francois-Moutal
- Organisation et Dynamique des Membrane Biologiques, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246 ICBMS , Bâtiment Chevreul, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex 69622, France
| | - Myriam M Ouberai
- Nanoscience Centre, University of Cambridge , 11 J.J. Thomson Avenue Cambridge, Cambridge CB3 0FF, U.K
| | - Ofelia Maniti
- Organisation et Dynamique des Membrane Biologiques, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246 ICBMS , Bâtiment Chevreul, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex 69622, France
| | - Mark E Welland
- Nanoscience Centre, University of Cambridge , 11 J.J. Thomson Avenue Cambridge, Cambridge CB3 0FF, U.K
| | - Agnieszka Strzelecka-Kiliszek
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences , 3 Pasteur Street, Warsaw 02-093, Poland
| | - Marcin Wos
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences , 3 Pasteur Street, Warsaw 02-093, Poland
| | - Slawomir Pikula
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences , 3 Pasteur Street, Warsaw 02-093, Poland
| | - Joanna Bandorowicz-Pikula
- Department of Biochemistry, Nencki Institute of Experimental Biology, Polish Academy of Sciences , 3 Pasteur Street, Warsaw 02-093, Poland
| | - Olivier Marcillat
- Organisation et Dynamique des Membrane Biologiques, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246 ICBMS , Bâtiment Chevreul, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex 69622, France
| | - Thierry Granjon
- Organisation et Dynamique des Membrane Biologiques, Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CNRS UMR 5246 ICBMS , Bâtiment Chevreul, 43 Boulevard du 11 Novembre 1918, Villeurbanne Cedex 69622, France
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CanisOme — The protein signatures of Canis lupus familiaris diseases. J Proteomics 2016; 136:193-201. [DOI: 10.1016/j.jprot.2016.01.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 12/19/2015] [Accepted: 01/08/2016] [Indexed: 12/19/2022]
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Qiu Y, Zhao D, Butenschön VM, Bauer AT, Schneider SW, Skolnik EY, Hammes HP, Wieland T, Feng Y. Nucleoside diphosphate kinase B deficiency causes a diabetes-like vascular pathology via up-regulation of endothelial angiopoietin-2 in the retina. Acta Diabetol 2016; 53:81-9. [PMID: 25900369 DOI: 10.1007/s00592-015-0752-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 03/30/2015] [Indexed: 11/25/2022]
Abstract
AIMS Nucleoside diphosphate kinase B (NDPKB) is capable of maintaining the cellular nucleotide triphosphate pools. It might therefore supply UTP for the formation of UDP-GlcNAc from glucose. As NDPKB contributes to vascular dysfunction, we speculate that NDPKB might play a role in microangiopathies, such as diabetic retinopathy (DR). Therefore, we investigated the impact of NDPKB on retinal vascular damage using NDPKB(-/-) mice during development of DR and its possible mechanisms. METHODS Pericyte loss and acellular capillary (AC) formation were assessed in streptozotocin-induced diabetic NDPKB(-/-) and wild-type (WT) mice. Expression of angiopoietin-2 (Ang2) and protein N-acetylglucosamine modification (GlcNAcylation) were assessed by western blot and/or immunofluorescence in the diabetic retinas as well as in endothelial cells depleted of NDPKB by siRNA and stimulated with high glucose. RESULTS Similar to diabetic WT retinas, non-diabetic NDPKB(-/-) retinas showed a significant decrease in pericyte coverage in comparison with non-diabetic WT retinas. Hyperglycemia further aggravates pericyte loss in diabetic NDPKB(-/-) retinas. AC formation was detected in the diabetic NDPKB(-/-) retinas. Similar to hyperglycemia, NDPKB deficiency induced Ang2 expression and protein GlcNAcylation that were not further altered in the diabetic retinas. In cultured endothelial cells, stimulation with high glucose and NDPKB depletion comparably increased Ang2 expression and protein GlcNAcylation. CONCLUSIONS Our data identify NDPKB as a protective factor in the retina, which controls Ang2 expression and the hexosamine pathway. NDPKB-deficient mice are a suitable model for studying mechanisms underlying diabetic retinal vascular damage.
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Affiliation(s)
- Yi Qiu
- Institute for Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University of Heidelberg, Mybachstr. 14, 68169, Mannheim, Germany
| | - Di Zhao
- Institute for Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University of Heidelberg, Mybachstr. 14, 68169, Mannheim, Germany
| | - Vicki-Marie Butenschön
- Institute for Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University of Heidelberg, Mybachstr. 14, 68169, Mannheim, Germany
| | - Alexander T Bauer
- Division of Experimental Dermatology, Department of Dermatology, Venereology, and Allergology, Medical Faculty Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Stefan W Schneider
- Division of Experimental Dermatology, Department of Dermatology, Venereology, and Allergology, Medical Faculty Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Edward Y Skolnik
- Division of Nephrology, New York University Langone Medical Center, 560 1st Ave, New York, NY, 10016, USA
| | - Hans-Peter Hammes
- 5th Medical Clinic, Medical Faculty Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Thomas Wieland
- Institute for Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University of Heidelberg, Mybachstr. 14, 68169, Mannheim, Germany
| | - Yuxi Feng
- Institute for Experimental and Clinical Pharmacology and Toxicology, Medical Faculty Mannheim, University of Heidelberg, Mybachstr. 14, 68169, Mannheim, Germany.
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Wieland T, Attwood PV. Alterations in reversible protein histidine phosphorylation as intracellular signals in cardiovascular disease. Front Pharmacol 2015; 6:173. [PMID: 26347652 PMCID: PMC4543942 DOI: 10.3389/fphar.2015.00173] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 08/03/2015] [Indexed: 01/27/2023] Open
Abstract
Reversible phosphorylation of amino acid side chains in proteins is a frequently used mechanism in cellular signal transduction and alterations of such phosphorylation patterns are very common in cardiovascular diseases. They reflect changes in the activities of the protein kinases and phosphatases involving signaling pathways. Phosphorylation of serine, threonine, and tyrosine residues has been extensively investigated in vertebrates, whereas reversible histidine phosphorylation, a well-known regulatory signal in lower organisms, has been largely neglected as it has been generally assumed that histidine phosphorylation is of minor importance in vertebrates. More recently, it has become evident that the nucleoside diphosphate kinase isoform B (NDPK-B), an ubiquitously expressed enzyme involved in nucleotide metabolism, and a highly specific phosphohistidine phosphatase (PHP) form a regulatory histidine protein kinase/phosphatase system in mammals. At least three well defined substrates of NDPK-B are known: The β-subunit of heterotrimeric G-proteins (Gβ), the intermediate conductance potassium channel SK4 and the Ca(2+) conducting TRP channel family member, TRPV5. In each of these proteins the phosphorylation of a specific histidine residue regulates cellular signal transduction or channel activity. This article will therefore summarize our current knowledge on protein histidine phosphorylation and highlight its relevance for cardiovascular physiology and pathophysiology.
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Affiliation(s)
- Thomas Wieland
- Institute for Experimental and Clinical Pharmacology and Toxicology, Mannheim Medical Faculty, Heidelberg University , Mannheim, Germany
| | - Paul V Attwood
- School of Chemistry and Biochemistry, The University of Western Australia , Crawley, Australia
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Zhang P, Kofron CM, Mende U. Heterotrimeric G protein-mediated signaling and its non-canonical regulation in the heart. Life Sci 2015; 129:35-41. [PMID: 25818188 PMCID: PMC4415990 DOI: 10.1016/j.lfs.2015.02.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Revised: 01/31/2015] [Accepted: 02/11/2015] [Indexed: 11/20/2022]
Abstract
Heterotrimeric guanine nucleotide-binding proteins (G proteins) regulate a multitude of signaling pathways in mammalian cells by transducing signals from G protein-coupled receptors (GPCRs) to effectors, which in turn regulate cellular function. In the myocardium, G protein signaling occurs in all cardiac cell types and is centrally involved in the regulation of heart rate, pump function, and vascular tone and in the response to hemodynamic stress and injury. Perturbations in G protein-mediated signaling are well known to contribute to cardiac hypertrophy, failure, and arrhythmias. Most of the currently used drugs for cardiac and other diseases target GPCR signaling. In the canonical G protein signaling paradigm, G proteins that are located at the cytoplasmic surface of the plasma membrane become activated after an agonist-induced conformational change of GPCRs, which then allows GTP-bound Gα and free Gβγ subunits to activate or inhibit effector proteins. Research over the past two decades has markedly broadened the original paradigm with a GPCR-G protein-effector at the cell surface at its core by revealing novel binding partners and additional subcellular localizations for heterotrimeric G proteins that facilitate many previously unrecognized functional effects. In this review, we focus on non-canonical and epigenetic-related mechanisms that regulate heterotrimeric G protein expression, activation, and localization and discuss functional consequences using cardiac examples where possible. Mechanisms reviewed involve microRNAs, histone deacetylases, chaperones, alternative modes of G protein activation, and posttranslational modifications. Some of these newly characterized mechanisms may be further developed into novel strategies for the treatment of cardiac disease and beyond.
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Affiliation(s)
- Peng Zhang
- Cardiovascular Research Center, Cardiology Division, Rhode Island Hospital, Providence, RI, USA; Alpert Medical School of Brown University, Providence, RI, USA
| | - Celinda M Kofron
- Cardiovascular Research Center, Cardiology Division, Rhode Island Hospital, Providence, RI, USA; Alpert Medical School of Brown University, Providence, RI, USA
| | - Ulrike Mende
- Cardiovascular Research Center, Cardiology Division, Rhode Island Hospital, Providence, RI, USA; Alpert Medical School of Brown University, Providence, RI, USA.
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Takács-Vellai K, Vellai T, Farkas Z, Mehta A. Nucleoside diphosphate kinases (NDPKs) in animal development. Cell Mol Life Sci 2015; 72:1447-62. [PMID: 25537302 PMCID: PMC11113130 DOI: 10.1007/s00018-014-1803-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 12/04/2014] [Accepted: 12/08/2014] [Indexed: 12/25/2022]
Abstract
In textbooks of biochemistry, nucleoside diphosphate conversion to a triphosphate by nucleoside diphosphate 'kinases' (NDPKs, also named NME or NM23 proteins) merits a few lines of text. Yet this essential metabolic function, mediated by a multimeric phosphotransferase protein, has effects that lie beyond a simple housekeeping role. NDPKs attracted more attention when NM23-H1 was identified as the first metastasis suppressor gene. In this review, we examine these NDPK enzymes from a developmental perspective because of the tractable phenotypes found in simple animal models that point to common themes. The data suggest that NDPK enzymes control the availability of surface receptors to regulate cell-sensing cues during cell migration. NDPKs regulate different forms of membrane enclosure that engulf dying cells during development. We suggest that NDPK enzymes have been essential for the regulated uptake of objects such as bacteria or micronutrients, and this evolutionarily conserved endocytic function contributes to their activity towards the regulation of metastasis.
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Affiliation(s)
- Krisztina Takács-Vellai
- Department of Biological Anthropology, Eötvös Loránd University, Pázmány Péter stny. 1/C, 1117, Budapest, Hungary,
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Progress on Nme (NDP kinase/Nm23/Awd) gene family-related functions derived from animal model systems: studies on development, cardiovascular disease, and cancer metastasis exemplified. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2015; 388:109-17. [PMID: 25585611 PMCID: PMC10153104 DOI: 10.1007/s00210-014-1079-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 12/10/2014] [Indexed: 12/17/2022]
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12
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Li Y, Tong Y, Wong YH. Regulatory functions of Nm23-H2 in tumorigenesis: insights from biochemical to clinical perspectives. Naunyn Schmiedebergs Arch Pharmacol 2014; 388:243-56. [PMID: 25413836 DOI: 10.1007/s00210-014-1066-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 11/07/2014] [Indexed: 12/12/2022]
Abstract
Substantial effort has been directed at elucidating the functions of the products of the Nm23 tumor metastasis suppressor genes over the past two decades, with the ultimate goal of exploring their translational potentials in changing cancer patients' outcomes. Much attention has been focused on the better-known Nm23-H1, but despite having high sequence similarity, Nm23-H2 functions differently in many aspects. Besides acting as a metastasis suppressor, compelling data suggest that Nm23-H2 may modulate various tumor-associated biological events to enhance tumorigenesis in human solid tumors and hematological malignancies. Linkage to tumorigenesis may occur through the ability of Nm23-H2 to regulate transcription, cell proliferation, apoptosis, differentiation, and telomerase activity. In this review, we examine the linkages of Nm23-H2 to tumorigenesis in terms of its biochemical and structural properties and discuss its potential role in various tumor-associated events.
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Affiliation(s)
- Yuanjun Li
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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13
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Feng Y, Gross S, Wolf NM, Butenschön VM, Qiu Y, Devraj K, Liebner S, Kroll J, Skolnik EY, Hammes HP, Wieland T. Nucleoside diphosphate kinase B regulates angiogenesis through modulation of vascular endothelial growth factor receptor type 2 and endothelial adherens junction proteins. Arterioscler Thromb Vasc Biol 2014; 34:2292-300. [PMID: 25147336 DOI: 10.1161/atvbaha.114.304239] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Nucleoside diphosphate kinase B (NDPKB) participates in the activation of heterotrimeric and monomeric G proteins, which are pivotal mediators in angiogenic signaling. The role of NDPKB in angiogenesis has to date not been defined. Therefore, we analyzed the contribution of NDPKB to angiogenesis and its underlying mechanisms in well-characterized in vivo and in vitro models. APPROACH AND RESULTS Zebrafish embryos were depleted of NDPKB by morpholino-mediated knockdown. These larvae displayed severe malformations specifically in vessels formed by angiogenesis. NDPKB-deficient (NDPKB(-/-)) mice were subjected to oxygen-induced retinopathy. In this model, the number of preretinal neovascularizations in NDPKB(-/-) mice was strongly reduced in comparison with wild-type littermates. In accordance, a delayed blood flow recovery was detected in the NDPKB(-/-) mice after hindlimb ligation. In in vitro studies, a small interfering RNA-mediated knockdown of NDPKB was performed in human umbilical endothelial cells. NDPKB depletion impaired vascular endothelial growth factor (VEGF)-induced sprouting and hampered the VEGF-induced spatial redistributions of the VEGF receptor type 2 and VE-cadherin at the plasma membrane. Concomitantly, NDPKB depletion increased the permeability of the human umbilical endothelial cell monolayer. CONCLUSIONS This is the first report to show that NDPKB is required for VEGF-induced angiogenesis and contributes to the correct localization of VEGF receptor type 2 and VE-cadherin at the endothelial adherens junctions. Therefore, our data identify NDPKB as a novel molecular target to modulate VEGF-dependent angiogenesis.
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Affiliation(s)
- Yuxi Feng
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Shalini Gross
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Nadine M Wolf
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Vicki M Butenschön
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Yi Qiu
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Kavi Devraj
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Stefan Liebner
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Jens Kroll
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Edward Y Skolnik
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Hans-Peter Hammes
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.)
| | - Thomas Wieland
- From the Institute of Experimental and Clinical Pharmacology and Toxicology (Y.F., S.G., N.M.W., V.M.B., Y.Q., T.W.), Department of Vascular Biology and Tumor Angiogenesis (J.K.), and the Fifth Medical Clinic (H.-P.H.), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute of Neurology (Edinger-Institute), Goethe University, Frankfurt, Germany (K.D., S.L.); and Division of Nephrology, New York University Langone Medical Center, New York (E.Y.S.).
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14
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Issac THK, Tan EL, Chu JJH. Proteomic profiling of chikungunya virus-infected human muscle cells: reveal the role of cytoskeleton network in CHIKV replication. J Proteomics 2014; 108:445-64. [PMID: 24933005 DOI: 10.1016/j.jprot.2014.06.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 05/06/2014] [Accepted: 06/03/2014] [Indexed: 02/01/2023]
Abstract
UNLABELLED Chikungunya virus (CHIKV) is an arthropod-borne, positive-sense, single-stranded RNA virus belonging to genus Alphavirus and family Togaviridae. The clinical manifestations developed upon CHIKV-infection include fever, myositis, arthralgia and maculopapular rash. Thus, the re-emergence of CHIKV has posed serious health threats worldwide. Due to the fact that myositis is induced upon CHIKV-infection, we sought to understand the dynamic proteomic regulation in SJCRH30, a human rhabdomyosarcoma cell line, to gain insights on CHIKV pathogenesis. Two-dimensional gel electrophoresis (2DE) in combination of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) was used to profile differential cellular proteins expression in CHIKV-infected SJCRH30 cells. 2DE analysis on CHIKV-infected cells has revealed 44 protein spots. These spots are found to be involved in various biological pathways such as biomolecules synthesis and metabolism, cell signaling and cellular reorganization. siRNA-mediated gene silencing on selected genes has elucidated the biological significance of these gene-translated host proteins involved in CHIKV-infection. More importantly, the interaction of vimentin with non-structural protein (nsP3) of CHIKV was shown, suggesting the role played by vimentin during CHIKV replication by forming an anchorage network with the CHIKV replication complexes (RCs). BIOLOGICAL SIGNIFICANCE Chikungunya virus (CHIKV) is a re-emerging virus that has caused various disease outbreaks in Africa and Asia. The clinical symptoms of CHIKV-infection include fever, skin rash, recurrent joint paint, and myositis. Neuronal implications and death may be resulted from the severe viral infection. Up to date, there are no effective treatments and vaccines against CHIKV-infection. More importantly, little is known about the differential regulation of host proteins upon CHIKV infection, hence deciphering the viral-host cell interactions during viral infection provide critical information on our understanding on the mechanisms of virus infection and its dependency of host proteins for replication. In light of the muscle-related clinical manifestations of myositis resulting from CHIKV-infection, human rhabdomyosarcoma cells, SJCRH30 were utilized in this protein profiling study, in order to decipher the pathogenesis of CHIKV. This study has identified an arrays of host proteins that are differentially regulated upon CHIKV infection including that of the cytoskeletal protein, vimentin that plays significant role in aiding the replication of CHIKV within the host cells through 2DE assay. Immunofluorescence assay further shows that the novel interaction between cytoskeleton structure and CHIKV replication complex by forming an intercalating network around the replication complexes and facilitating various stages of the virus life cycle. This novel finding has inevitably led to a deeper understanding of CHIKV pathogenesis in revealing the importance of host proteins during CHIKV replication, as well as contributing to the development of specific antiviral strategies against this medically important viral pathogen.
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Affiliation(s)
- Too Horng Khit Issac
- Laboratory of Molecular RNA Virology and Antiviral Strategies. Department of Microbiology, Yong Loo Lin School of Medicine, National University Health System, 5 Science Drive 2, National University of Singapore, Singapore 117597
| | - Eng Lee Tan
- Department of Paediatrics, University Children's Medical Institute, National University Hospital, Singapore, Singapore; Centre for Biomedical and Life Sciences, Singapore Polytechnic, 500 Dover Road, Singapore, Singapore
| | - Justin Jang Hann Chu
- Laboratory of Molecular RNA Virology and Antiviral Strategies. Department of Microbiology, Yong Loo Lin School of Medicine, National University Health System, 5 Science Drive 2, National University of Singapore, Singapore 117597.
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15
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Pereira CA, Reigada C, Sayé M, Digirolamo FA, Miranda MR. Cytosolic Trypanosoma cruzi nucleoside diphosphate kinase generates large granules that depend on its quaternary structure. Exp Parasitol 2014; 142:43-50. [PMID: 24768953 DOI: 10.1016/j.exppara.2014.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 03/28/2014] [Accepted: 04/17/2014] [Indexed: 10/25/2022]
Abstract
Nucleoside diphosphate kinase (NDPK) is a key enzyme in the control of cellular concentrations of nucleoside triphosphates, and has been shown to play important roles in many cellular processes. In this work we investigated the subcellular localization of the canonical NDPK1 from Trypanosoma cruzi (TcNDPK1), the etiological agent Chagas's Disease, and evaluated the effect of adding an additional weak protein-protein interaction domain from the green fluorescent protein (GFP). Immunofluorescence microscopy revealed that the enzyme from wild-type and TcNDPK1 overexpressing parasites has a cytosolic distribution, being the signal more intense around the nucleus. However, when TcNDPK1 was fused with dimeric GFP it relocalizes in non-membrane bounded granules also located adjacent to the nucleus. In addition, these granular structures were dependent on the quaternary structure of TcNDPK1 and GFP since mutations in residues involved in their oligomerization dramatically decrease the amount of granules. This phenomenon seems to be specific for TcNDPK1 since other cytosolic hexameric enzyme from T. cruzi, such as the NADP(+)-linked glutamate dehydrogenase, was not affected by the fusion with GFP. In addition, in parasites without GFP fusions granules could be observed in a subpopulation of epimastigotes under metacyclogenesis and metacyclic trypomastigotes. Organization into higher protein arrangements appears to be a singular feature of canonical NDPKs; however the physiological function of such structures requires further investigation.
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Affiliation(s)
- Claudio A Pereira
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Chantal Reigada
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Melisa Sayé
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Fabio A Digirolamo
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina
| | - Mariana R Miranda
- Laboratorio de Biología Molecular de Trypanosoma cruzi (LBMTC), Instituto de Investigaciones Médicas Alfredo Lanari, Universidad de Buenos Aires and CONICET, Buenos Aires, Argentina.
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16
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Masoudi N, Fancsalszky L, Pourkarimi E, Vellai T, Alexa A, Reményi A, Gartner A, Mehta A, Takács-Vellai K. The NM23-H1/H2 homolog NDK-1 is required for full activation of Ras signaling in C. elegans. Development 2013; 140:3486-95. [PMID: 23900546 PMCID: PMC3737725 DOI: 10.1242/dev.094011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2013] [Indexed: 11/21/2022]
Abstract
The group I members of the Nm23 (non-metastatic) gene family encode nucleoside diphosphate kinases (NDPKs) that have been implicated in the regulation of cell migration, proliferation and differentiation. Despite their developmental and medical significance, the molecular functions of these NDPKs remain ill defined. To minimize confounding effects of functional compensation between closely related Nm23 family members, we studied ndk-1, the sole Caenorhabditis elegans ortholog of group I NDPKs, and focused on its role in Ras/mitogen-activated protein kinase (MAPK)-mediated signaling events during development. ndk-1 inactivation leads to a protruding vulva phenotype and affects vulval cell fate specification through the Ras/MAPK cascade. ndk-1 mutant worms show severe reduction of activated, diphosphorylated MAPK in somatic tissues, indicative of compromised Ras/MAPK signaling. A genetic epistasis analysis using the vulval induction system revealed that NDK-1 acts downstream of LIN-45/Raf, but upstream of MPK-1/MAPK, at the level of the kinase suppressors of ras (KSR-1/2). KSR proteins act as scaffolds facilitating Ras signaling events by tethering signaling components, and we suggest that NDK-1 modulates KSR activity through direct physical interaction. Our study reveals that C. elegans NDK-1/Nm23 influences differentiation by enhancing the level of Ras/MAPK signaling. These results might help to better understand how dysregulated Nm23 in humans contributes to tumorigenesis.
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Affiliation(s)
- Neda Masoudi
- Department of Genetics, Eötvös Loránd University, Pázmány Péter stny. 1/C, H-1117 Budapest, Hungary
- Wellcome Trust Centre for Gene Regulation and Expression, University of Dundee, Dow Street, Dundee DD1 5EH, UK
| | - Luca Fancsalszky
- Department of Genetics, Eötvös Loránd University, Pázmány Péter stny. 1/C, H-1117 Budapest, Hungary
| | - Ehsan Pourkarimi
- Department of Genetics, Eötvös Loránd University, Pázmány Péter stny. 1/C, H-1117 Budapest, Hungary
- Wellcome Trust Centre for Gene Regulation and Expression, University of Dundee, Dow Street, Dundee DD1 5EH, UK
| | - Tibor Vellai
- Department of Genetics, Eötvös Loránd University, Pázmány Péter stny. 1/C, H-1117 Budapest, Hungary
| | - Anita Alexa
- Department of Biochemistry, Eötvös Loránd University, Pázmány Péter stny. 1/C, H-1117 Budapest, Hungary
- Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
| | - Attila Reményi
- Department of Biochemistry, Eötvös Loránd University, Pázmány Péter stny. 1/C, H-1117 Budapest, Hungary
- Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary
| | - Anton Gartner
- Wellcome Trust Centre for Gene Regulation and Expression, University of Dundee, Dow Street, Dundee DD1 5EH, UK
| | - Anil Mehta
- Division of Medical Sciences, Centre for CVS and Lung Biology, Ninewells Hospital Medical School, Dundee DD1 9SY, UK
| | - Krisztina Takács-Vellai
- Department of Genetics, Eötvös Loránd University, Pázmány Péter stny. 1/C, H-1117 Budapest, Hungary
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Marino N, Nakayama J, Collins JW, Steeg PS. Insights into the biology and prevention of tumor metastasis provided by the Nm23 metastasis suppressor gene. Cancer Metastasis Rev 2013; 31:593-603. [PMID: 22706779 DOI: 10.1007/s10555-012-9374-8] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Metastatic disease is the major cause of death among cancer patients. A class of genes, named metastasis suppressors, has been described to specifically regulate the metastatic process. The metastasis suppressor genes are downregulated in the metastatic lesion compared to the primary tumor. In this review, we describe the body of research surrounding the first metastasis suppressor identified, Nm23. Nm23 overexpression in aggressive cancer cell lines reduced their metastatic potential in vivo with no significant reduction in primary tumor size. A complex mechanism of anti-metastatic action is unfolding involving several known Nm23 enzymatic activities (nucleotide diphosphate kinase, histidine kinase, and 3'-5' exonuclease), protein-protein interactions, and downstream gene regulation properties. Translational approaches involving Nm23 have progressed to the clinic. The upregulation of Nm23 expression by medroxyprogesterone acetate has been tested in a phase II trial. Other approaches with significant preclinical success include gene therapy using traditional or nanoparticle delivery, and cell permeable Nm23 protein. Recently, based on the inverse correlation of Nm23 and LPA1 expression, a LPA1 inhibitor has been shown to both inhibit metastasis and induce metastatic dormancy.
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Affiliation(s)
- Natascia Marino
- Women's Cancers Section, Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, 37 Convent Drive, Room 1122, Bethesda, MD 20892, USA.
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18
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Competition for Gβγ dimers mediates a specific cross-talk between stimulatory and inhibitory G protein α subunits of the adenylyl cyclase in cardiomyocytes. Naunyn Schmiedebergs Arch Pharmacol 2013; 386:459-69. [PMID: 23615874 DOI: 10.1007/s00210-013-0876-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Accepted: 04/17/2013] [Indexed: 12/20/2022]
Abstract
Heterotrimeric G proteins are key regulators of signaling pathways in mammalian cells. Beyond G protein-coupled receptors, the amount and mutual ratio of specific G protein α, β, and γ subunits determine the G protein signaling. However, little is known about mechanisms that regulate the concentration and composition of G protein subunits at the plasma membrane. Here, we show a novel cross-talk between stimulatory and inhibitory G protein α subunits (Gα) that is mediated by G protein βγ dimers and controls the abundance of specific Gα subunits at the plasma membrane. Firstly, we observed in heart tissue from constitutively Gαi2- and Gαi3-deficient mice that the loss of Gαi2 and Gαi3 was accompanied by a slight increase in the protein content of the nontargeted Gαi isoform. Therefore, we analyzed whether overexpression of selected Gα subunits conversely impairs endogenous G protein α and β subunit levels in cardiomyocytes. Integration of overexpressed Gαi2 subunits into heterotrimeric G proteins was verified by co-immunoprecipitation. Adenoviral expression of increasing amounts of Gαi2 led to a reduction of Gαi3 (up to 90 %) and Gαs (up to 75 %) protein levels. Likewise, increasing amounts of adenovirally expressed Gαs resulted in a linear 75 % decrease in both Gαi2 and Gαi3 protein levels. In contrast, overexpression of either Gαi or Gαs isoform did not influence the amount of Gαo and Gαq, both of which are not involved in the regulation of adenylyl cyclase activity. The mRNA expression of the disappearing endogenous Gα subunits was not affected, indicating a posttranslational mechanism. Interestingly, the amount of endogenous G protein βγ dimers was not altered by any Gα overexpression. However, the increase of Gβγ level by adenoviral expression prevented the loss of endogenous Gαs and Gαi3 in Gαi2 overexpressing cardiomyocytes. Thus, our results provide evidence for a novel mechanism cross-regulating adenylyl cyclase-modulating Gαi isoforms and Gαs proteins. The Gα subunits apparently compete for a limited amount of Gβγ dimers, which are required for G protein heterotrimer formation at the plasma membrane.
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19
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Desvignes T, Fostier A, Fauvel C, Bobe J. The Nme gene family in fish. FISH PHYSIOLOGY AND BIOCHEMISTRY 2013; 39:53-58. [PMID: 22484598 DOI: 10.1007/s10695-012-9639-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Accepted: 03/23/2012] [Indexed: 05/31/2023]
Abstract
The Nme gene family, also known as Nm23 or NDPK, is a very ancient gene family that can be found in all kingdoms of life. In the late eighties, a gene of the Nme family, NME1, was identified as the first metastatic suppressor gene, resulting in a major interest for this family. Due to the complexity of the family, the need for a unified and evolutionary-supported gene nomenclature was recently stressed by the scientific community. Based on a complete evolutionary history study of the gene family in metazoans and vertebrates, a unified nomenclature was recently proposed and accepted by gene nomenclature consortia. In addition to its well-documented role in tumor metastasis, members of the Nme family are also involved in a wide variety of cellular and physiological processes. Available data in non-mammalian species remain, however, scarce with the noticeable exception of Drosophila in which a major role in development was reported. In fish, very few studies have specifically investigated the role of nme genes. Several transcriptomic and proteomic studies have, however, revealed the expression of nme genes in various fish organs and tissues, in mature oocytes, and during embryonic development. Altogether, interest for the Nme gene family in fish is growing and new functions/roles in fish biology are expected to be discovered in the forthcoming years. Here, we briefly review the current knowledge of the Nme family in fish.
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Affiliation(s)
- T Desvignes
- Fish Physiology and Genomics, INRA, UR1037 LPGP, Campus de Beaulieu, 35042, Rennes, France
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20
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Spooner R, Yilmaz Ö. Nucleoside-diphosphate-kinase: a pleiotropic effector in microbial colonization under interdisciplinary characterization. Microbes Infect 2012; 14:228-37. [PMID: 22079150 PMCID: PMC3277739 DOI: 10.1016/j.micinf.2011.10.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 10/07/2011] [Accepted: 10/07/2011] [Indexed: 12/20/2022]
Abstract
Emerging evidence identifies multiple roles for nucleoside-diphosphate-kinase in host-microbe interaction. We provide the first synopsis of utilization of this molecule by various microorganisms during colonization of host tissues. Additionally, we propose novel mechanisms this effector may participate in, which could be crucial for microbial adaptation in chronic host infection.
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Affiliation(s)
- Ralee Spooner
- Department of Periodontology, University of Florida, Gainesville, FL 32610, USA
| | - Özlem Yilmaz
- Department of Periodontology, University of Florida, Gainesville, FL 32610, USA
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32610, USA
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21
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Steeg PS, Zollo M, Wieland T. A critical evaluation of biochemical activities reported for the nucleoside diphosphate kinase/Nm23/Awd family proteins: opportunities and missteps in understanding their biological functions. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2011; 384:331-9. [PMID: 21611737 PMCID: PMC10153102 DOI: 10.1007/s00210-011-0651-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 04/27/2011] [Indexed: 10/18/2022]
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