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Filograna A, De Tito S, Monte ML, Oliva R, Bruzzese F, Roca MS, Zannetti A, Greco A, Spano D, Ayala I, Liberti A, Petraccone L, Dathan N, Catara G, Schembri L, Colanzi A, Budillon A, Beccari AR, Del Vecchio P, Luini A, Corda D, Valente C. Identification and characterization of a new potent inhibitor targeting CtBP1/BARS in melanoma cells. J Exp Clin Cancer Res 2024; 43:137. [PMID: 38711119 PMCID: PMC11071220 DOI: 10.1186/s13046-024-03044-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 04/10/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND The C-terminal-binding protein 1/brefeldin A ADP-ribosylation substrate (CtBP1/BARS) acts both as an oncogenic transcriptional co-repressor and as a fission inducing protein required for membrane trafficking and Golgi complex partitioning during mitosis, hence for mitotic entry. CtBP1/BARS overexpression, in multiple cancers, has pro-tumorigenic functions regulating gene networks associated with "cancer hallmarks" and malignant behavior including: increased cell survival, proliferation, migration/invasion, epithelial-mesenchymal transition (EMT). Structurally, CtBP1/BARS belongs to the hydroxyacid-dehydrogenase family and possesses a NAD(H)-binding Rossmann fold, which, depending on ligands bound, controls the oligomerization of CtBP1/BARS and, in turn, its cellular functions. Here, we proposed to target the CtBP1/BARS Rossmann fold with small molecules as selective inhibitors of mitotic entry and pro-tumoral transcriptional activities. METHODS Structured-based screening of drug databases at different development stages was applied to discover novel ligands targeting the Rossmann fold. Among these identified ligands, N-(3,4-dichlorophenyl)-4-{[(4-nitrophenyl)carbamoyl]amino}benzenesulfonamide, called Comp.11, was selected for further analysis. Fluorescence spectroscopy, isothermal calorimetry, computational modelling and site-directed mutagenesis were employed to define the binding of Comp.11 to the Rossmann fold. Effects of Comp.11 on the oligomerization state, protein partners binding and pro-tumoral activities were evaluated by size-exclusion chromatography, pull-down, membrane transport and mitotic entry assays, Flow cytometry, quantitative real-time PCR, motility/invasion, and colony assays in A375MM and B16F10 melanoma cell lines. Effects of Comp.11 on tumor growth in vivo were analyzed in mouse tumor model. RESULTS We identify Comp.11 as a new, potent and selective inhibitor of CtBP1/BARS (but not CtBP2). Comp.11 directly binds to the CtBP1/BARS Rossmann fold affecting the oligomerization state of the protein (unlike other known CtBPs inhibitors), which, in turn, hinders interactions with relevant partners, resulting in the inhibition of both CtBP1/BARS cellular functions: i) membrane fission, with block of mitotic entry and cellular secretion; and ii) transcriptional pro-tumoral effects with significantly hampered proliferation, EMT, migration/invasion, and colony-forming capabilities. The combination of these effects impairs melanoma tumor growth in mouse models. CONCLUSIONS: This study identifies a potent and selective inhibitor of CtBP1/BARS active in cellular and melanoma animal models revealing new opportunities to study the role of CtBP1/BARS in tumor biology and to develop novel melanoma treatments.
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Affiliation(s)
- Angela Filograna
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Stefano De Tito
- Molecular Cell Biology of Autophagy, The Francis Crick Institute, London, UK. The Study Has Been Previously Performed at IEOS-CNR, Naples, Italy
| | - Matteo Lo Monte
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Rosario Oliva
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
| | - Francesca Bruzzese
- Animal Facility Unit, Istituto Nazionale Tumori-IRCCS-Fondazione G. Pascale, 80131, Naples, Italy
| | - Maria Serena Roca
- Experimental Pharmacology Unit, Istituto Nazionale Tumori-IRCCS-Fondazione G. Pascale, Naples, 80131, Italy
| | - Antonella Zannetti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), Naples, 80145, Italy
| | - Adelaide Greco
- Interdepartmental Service Center of Veterinary Radiology, University of Naples Federico II, 80137, Naples, Italy
| | - Daniela Spano
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Inmaculada Ayala
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Assunta Liberti
- National Research Council (CNR), Piazzale Aldo Moro, 700185, Rome, Italy
- Biology and Evolution of Marine Organisms (BEOM), Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Luigi Petraccone
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
| | - Nina Dathan
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Giuliana Catara
- Institute of Biochemistry and Cell Biology, National Research Council (CNR), 80131, Naples, Italy
| | - Laura Schembri
- National Research Council (CNR), Piazzale Aldo Moro, 700185, Rome, Italy
- Department of Pharmacy, University of Naples Federico II, 80131, Naples, Italy
| | - Antonino Colanzi
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Alfredo Budillon
- Scientific Directorate, Istituto Nazionale Tumori-IRCCS-Fondazione G. Pascale, 80131, Naples, Italy
| | | | - Pompea Del Vecchio
- Department of Chemical Sciences, University of Naples Federico II, 80126, Naples, Italy
| | - Alberto Luini
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy
| | - Daniela Corda
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy.
| | - Carmen Valente
- Institute of Experimental Endocrinology and Oncology "G. Salvatore"(IEOS), National Research Council (CNR), 80131, Naples, Italy.
- Present address: Dompé Farmaceutici S.P.A, L'Aquila, Italy.
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Marques MC, Lousa D, Silva PM, Faustino AF, Soares CM, Santos NC. The Importance of Lipid Conjugation on Anti-Fusion Peptides against Nipah Virus. Biomedicines 2022; 10:biomedicines10030703. [PMID: 35327503 PMCID: PMC8945041 DOI: 10.3390/biomedicines10030703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/13/2022] [Accepted: 03/14/2022] [Indexed: 01/23/2023] Open
Abstract
Nipah virus (NiV) is a recently emerging zoonotic virus that belongs to the Paramyxoviridae family and the Henipavirus genus. It causes a range of conditions, from asymptomatic infection to acute respiratory illness and fatal encephalitis. The high mortality rate of 40 to 90% ranks these viruses among the deadliest viruses known to infect humans. Currently, there is no antiviral drug available for Nipah virus disease and treatment is only supportive. Thus, there is an urgent demand for efficient antiviral therapies. NiV F protein, which catalyzes fusion between the viral and host membranes, is a potential target for antiviral drugs, as it is a key protein in the initial stages of infection. Fusion inhibitor peptides derived from the HRC-domain of the F protein are known to bind to their complementary domain in the protein’s transient intermediate state, preventing the formation of a six-helix bundle (6HB) thought to be responsible for driving the fusion of the viral and cell membranes. Here, we evaluated the biophysical and structural properties of four different C-terminal lipid-tagged peptides. Different compositions of the lipid tags were tested to search for properties that might promote efficacy and broad-spectrum activity. Fluorescence spectroscopy was used to study the interaction of the peptides with biomembrane model systems and human blood cells. In order to understand the structural properties of the peptides, circular dichroism measurements and molecular dynamics simulations were performed. Our results indicate a peptide preference for cholesterol-enriched membranes and a lipid conjugation-driven stabilization of the peptide α-helical secondary structure. This work may contribute for the development of highly effective viral fusion against NiV inhibitors.
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Affiliation(s)
- Marta C. Marques
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.C.M.); (P.M.S.); (A.F.F.)
| | - Diana Lousa
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal; (D.L.); (C.M.S.)
| | - Patrícia M. Silva
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.C.M.); (P.M.S.); (A.F.F.)
| | - André F. Faustino
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.C.M.); (P.M.S.); (A.F.F.)
| | - Cláudio M. Soares
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal; (D.L.); (C.M.S.)
| | - Nuno C. Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; (M.C.M.); (P.M.S.); (A.F.F.)
- Correspondence:
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3
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Forgione RE, Di Carluccio C, Milanesi F, Kubota M, Fabregat Nieto F, Molinaro A, Hashiguchi T, Francesconi O, Marchetti R, Silipo A. Characterization of Natural and Synthetic Sialoglycans Targeting the Hemagglutinin-Neuraminidase of Mumps Virus. Front Chem 2021; 9:711346. [PMID: 34778199 PMCID: PMC8578797 DOI: 10.3389/fchem.2021.711346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 09/13/2021] [Indexed: 11/13/2022] Open
Abstract
The inhibition of surface viral glycoproteins offers great potential to hamper the attachment of viruses to the host cells surface and the spreading of viral infection. Mumps virus (MuV) is the etiological agent of the mumps infectious disease and causes a wide spectrum of mild to severe symptoms due to the inflammation of the salivary glands. Here we focus our attention on the hemagglutinin-neuraminidase (HN) isolated from MuV SBL-1 strain. We describe the molecular features of host sialoglycans recognition by HN protein by means of NMR, fluorescence assays and computational studies. Furthermore, we also describe the synthesis of a N-acetylneuraminic acid-derived thiotrisaccharide targeting the viral protein, and the corresponding 3D-complex. Our results provide the basis to improve the design and synthesis of potent viral hemagglutinin-neuraminidase inhibitors.
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Affiliation(s)
- Rosa Ester Forgione
- Department of Chemical Sciences, Complesso Universitario Monte Sant'Angelo, University of Naples Federico II, Naples, Italy
| | - Cristina Di Carluccio
- Department of Chemical Sciences, Complesso Universitario Monte Sant'Angelo, University of Naples Federico II, Naples, Italy
| | - Francesco Milanesi
- Department of Chemistry "Ugo Schiff" and INSTM, University of Florence Polo Scientifico e Tecnologico, Florence, Italy.,Magnetic Resonance Center CERM, Sesto Fiorentino, Italy
| | - Marie Kubota
- Department of Virology, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Ferran Fabregat Nieto
- Department of Chemical Sciences, Complesso Universitario Monte Sant'Angelo, University of Naples Federico II, Naples, Italy
| | - Antonio Molinaro
- Department of Chemical Sciences, Complesso Universitario Monte Sant'Angelo, University of Naples Federico II, Naples, Italy
| | - Takao Hashiguchi
- Laboratory of Medical Virology, Department of Virus Research, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Oscar Francesconi
- Department of Chemistry "Ugo Schiff" and INSTM, University of Florence Polo Scientifico e Tecnologico, Florence, Italy
| | - Roberta Marchetti
- Department of Chemical Sciences, Complesso Universitario Monte Sant'Angelo, University of Naples Federico II, Naples, Italy
| | - Alba Silipo
- Department of Chemical Sciences, Complesso Universitario Monte Sant'Angelo, University of Naples Federico II, Naples, Italy
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Swiecicki JM, Thiebaut F, Di Pisa M, Gourdin-Bertin S, Tailhades J, Mansuy C, Burlina F, Chwetzoff S, Trugnan G, Chassaing G, Lavielle S. How to unveil self-quenched fluorophores and subsequently map the subcellular distribution of exogenous peptides. Sci Rep 2016; 6:20237. [PMID: 26839211 PMCID: PMC4738315 DOI: 10.1038/srep20237] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/23/2015] [Indexed: 02/07/2023] Open
Abstract
Confocal laser scanning microscopy (CLSM) is the most popular technique for mapping the subcellular distribution of a fluorescent molecule and is widely used to investigate the penetration properties of exogenous macromolecules, such as cell-penetrating peptides (CPPs), within cells. Despite the membrane-association propensity of all these CPPs, the signal of the fluorescently labeled CPPs did not colocalize with the plasma membrane. We studied the origin of this fluorescence extinction and the overall consequence on the interpretation of intracellular localizations from CLSM pictures. We demonstrated that this discrepancy originated from fluorescence self-quenching. The fluorescence was unveiled by a “dilution” protocol, i.e. by varying the ratio fluorescent/non-fluorescent CPP. This strategy allowed us to rank with confidence the subcellular distribution of several CPPs, contributing to the elucidation of the penetration mechanism. More generally, this study proposes a broadly applicable and reliable method to study the subcellular distribution of any fluorescently labeled molecules.
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Affiliation(s)
- Jean-Marie Swiecicki
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
| | - Frédéric Thiebaut
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
| | - Margherita Di Pisa
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
| | - Simon Gourdin-Bertin
- Sorbonne Universités, UPMC Univ Paris 06, PHENIX, 4 Place Jussieu, 75005 Paris, France.,CNRS, UMR 8234, PHENIX, Paris, France
| | - Julien Tailhades
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
| | - Christelle Mansuy
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
| | - Fabienne Burlina
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
| | - Serge Chwetzoff
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,INSERM-ERL 1157, CHU Saint Antoine, 27 rue de Chaligny, 75012 Paris, France.,AP-HP, Hôpital Saint Antoine, 75012 Paris, France.,INRA, UR892, Virologie et Immunologie Moléculaires, 78350 Jouy-en-Jossas, France
| | - Germain Trugnan
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,AP-HP, Hôpital Saint Antoine, 75012 Paris, France.,INRA, UR892, Virologie et Immunologie Moléculaires, 78350 Jouy-en-Jossas, France
| | - Gérard Chassaing
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
| | - Solange Lavielle
- Sorbonne Universités, UPMC Univ Paris 06, LBM, 4, Place Jussieu, 75005 Paris, France.,Ecole Normale Supérieure - PSL research University, Département de Chimie, 24 Rue Lhomond, 75005 Paris, France.,CNRS, UMR 7203, LBM, Paris, France
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5
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Gasymov OK, Abduragimov AR, Glasgow BJ. A simple model-free method for direct assessment of fluorescent ligand binding by linear spectral summation. J Fluoresc 2013; 24:231-8. [PMID: 24043458 DOI: 10.1007/s10895-013-1290-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 08/21/2013] [Indexed: 10/26/2022]
Abstract
Fluorescent tagged ligands are commonly used to determine binding to proteins. However, bound and free ligand concentrations are not directly determined. Instead the response in a fluorescent ligand titration experiment is considered to be proportional to the extent of binding and, therefore, the maximum value of binding is scaled to the total protein concentration. Here, a simple model-free method is presented to be performed in two steps. In the first step, normalized bound and free spectra of the ligand are determined. In the second step, these spectra are used to fit composite spectra as the sum of individual components or linear spectral summation. Using linear spectral summation, free and bound 1-Anilinonaphthalene-8-Sulfonic Acid (ANS) fluorescent ligand concentrations are directly calculated to determine ANS binding to tear lipocalin (TL), an archetypical ligand binding protein. Error analysis shows that the parameters that determine bound and free ligand concentrations were recovered with high certainty. The linear spectral summation method is feasible when fluorescence intensity is accompanied by a spectral shift upon protein binding. Computer simulations of the experiments of ANS binding to TL indicate that the method is feasible when the fluorescence spectral shift between bound and free forms of the ligand is just 8 nm. Ligands tagged with environmentally sensitive fluorescent dyes, e.g., dansyl chromophore, are particularly suitable for this method.
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Affiliation(s)
- Oktay K Gasymov
- Departments of Ophthalmology, Pathology and Laboratory Medicine, Jules Stein Eye Institute, University of California at Los Angeles, Los Angeles, CA, 90095, USA,
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Freire JM, Veiga AS, de la Torre BG, Andreu D, Castanho MARB. Quantifying molecular partition of cell-penetrating peptide-cargo supramolecular complexes into lipid membranes: optimizing peptide-based drug delivery systems. J Pept Sci 2013; 19:182-9. [PMID: 23322613 DOI: 10.1002/psc.2477] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 11/23/2012] [Accepted: 11/26/2012] [Indexed: 11/08/2022]
Abstract
One of the major challenges in the drug development process is biodistribution across epithelia and intracellular drug targeting. Cellular membrane heterogeneity is one of the major drawbacks in developing efficient and sustainable drug delivery systems, which brings the need to study their interaction with lipids in order to unravel their mechanisms of action and improve their delivery capacities. Cell penetrating peptides (CPPs) are able to translocate almost any cell membrane carrying cargo molecules. However, different CPP use different entry mechanisms, which are often concentration-dependent and cargo-dependent. Being able to quantify the lipid affinity of CPP is of obvious importance and can be achieved by studying the partition extent of CPP into lipid bilayers. The partition constant (Kp) reflects the lipid-water partition extent. However, all currently available methodologies are only suitable to determine the partition of single molecules into lipid membranes or entities, being unsuitable to determine the partition of bimolecular or higher order supramolecular complexes. We derived and tested a mathematical model to determine the Kp of supramolecular CPP-cargo complexes from fluorescence spectroscopy data, using DNA oligomers as a model cargo. As a proof-of-concept example, the partition extent of two new membrane active peptides derived from dengue virus capsid protein (DENV C protein) with potential CPP properties, in both scenarios (free peptide and complexed with a molecular cargo), were tested. We were able to identify the lipid affinity of these CPP:DNA complexes, thus gaining valuable insights into better CPP formulations.
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Affiliation(s)
- João Miguel Freire
- Instituto de Medicina Molecular, University of Lisbon, Physical Biochemistry Unit, Lisbon, Portugal
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Castanho MARB, Dathe M. Biophysics meets membrane-active peptides. J Pept Sci 2008; 14:365-7. [DOI: 10.1002/psc.1013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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