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Risseeuw MDP, De Clercq DJH, Lievens S, Hillaert U, Sinnaeve D, Van den Broeck F, Martins JC, Tavernier J, Van Calenbergh S. A "clickable" MTX reagent as a practical tool for profiling small-molecule-intracellular target interactions via MASPIT. ChemMedChem 2013; 8:521-6. [PMID: 23341183 PMCID: PMC3790973 DOI: 10.1002/cmdc.201200493] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 12/11/2012] [Indexed: 12/19/2022]
Abstract
We present a scalable synthesis of a versatile MTX reagent with an azide ligation handle that allows rapid γ-selective conjugation to yield MTX fusion compounds (MFCs) appropriate for MASPIT, a three-hybrid system that enables the identification of mammalian cytosolic proteins that interact with a small molecule of interest. We selected three structurally diverse pharmacologically active compounds (tamoxifen, reversine, and FK506) as model baits. After acetylene functionalization of these baits, MFCs were synthesized via a CuAAC reaction, demonstrating the general applicability of the MTX reagent. In analytical mode, MASPIT was able to give concentration-dependent reporter signals for the established target proteins. Furthermore, we demonstrate that the sensitivity obtained with the new MTX reagent was significantly stronger than that of a previously used non-regiomeric conjugate mixture. Finally, the FK506 MFC was explored in a cellular array screen for targets of FK506. Out of a pilot collection of nearly 2000 full-length human ORF preys, FKBP12, the established target of FK506, emerged as the prey protein that gave the highest increase in luciferase activity. This indicates that our newly developed synthetic strategy for the straightforward generation of MFCs is a promising asset to uncover new intracellular targets using MASPIT cellular array screening.
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Affiliation(s)
- Martijn D P Risseeuw
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000 Gent, Belgium
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Kapoerchan VV, Wiesner M, Hillaert U, Drijfhout JW, Overhand M, Alard P, van der Marel GA, Overkleeft HS, Koning F. Design, synthesis and evaluation of high-affinity binders for the celiac disease associated HLA-DQ2 molecule. Mol Immunol 2009; 47:1091-7. [PMID: 19962195 DOI: 10.1016/j.molimm.2009.10.036] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Accepted: 10/29/2009] [Indexed: 11/26/2022]
Abstract
Celiac disease is caused by uncontrolled CD4 T-cell responses directed to wheat-derived gluten peptides bound to the disease predisposing HLA-DQ molecules. The only available treatment is a life-long gluten-free diet which is complicated by the widespread use of wheat-derived gluten in the food industry. As the binding of gluten-derived peptides is a prerequisite for the induction of the inflammatory T-cell response, blockers that would prevent gluten peptide binding to the HLA-DQ molecules might be used as an alternative to the gluten-free diet. In the present study we have analyzed the binding properties of a set of previously identified natural ligands for HLA-DQ2, the primary disease predisposing allele. An in silico method, Epibase, ranked these peptides and the top one, a peptide with a nine amino acid core FVAEYEPVL, was measured among these peptides as the peptide with the highest binding affinity for HLA-DQ2. In a stepwise approach we subsequently tested the impact of N-terminal extensions and systematic single amino acid substitutions within the core of this peptide which revealed that an N-terminal extension with the tripeptide sequence ADA increased binding affinity 5- to 6-fold. In addition the substitution analysis indicated which amino acids were most preferred at anchor residues in the lead peptide, generally leading to an increase of binding affinity with a factor of 2. Next we tested which combinations of such preferred amino acids yielded the best results. The combined results indicate that a peptide with sequence ADAYDYESEELFAA (core in bold) had superior binding properties. This peptide was chosen as a lead peptide for further optimization with non-natural amino acids at the p1 position, since molecular modeling indicated that none of the natural amino acids is able to optimally occupy the p1 pocket. A set of 8 non-proteinogenic amino acids was designed, synthesized and incorporated in the lead peptide (and in two control peptides) and tested for binding to HLA-DQ2. The results indicate that the effect of the incorporation of these non-proteinogenic amino acids depended on the peptide in which they were incorporated and that the maximum increase in binding affinity obtained was approximately 2-fold. Altogether lead sequences were obtained that have a binding affinity for HLA-DQ2 that is 100- to 200-fold higher compared to that of the gluten-derived peptide that has the highest affinity for HLA-DQ2. Such peptides are candidate lead peptides for further optimization. Our results, however, also indicate that in order to obtain further significant increases in binding affinity alternative approaches will have to be explored.
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Affiliation(s)
- Varsha V Kapoerchan
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden, The Netherlands
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3
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Hillaert U, Verdoes M, Florea B, Saragliadis A, Habets K, Kuiper J, Van Calenbergh S, Ossendorp F, van der Marel G, Driessen C, Overkleeft H. Receptor-Mediated Targeting of Cathepsins in Professional Antigen Presenting Cells. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/anie.200990068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hillaert U, Verdoes M, Florea B, Saragliadis A, Habets K, Kuiper J, Van Calenbergh S, Ossendorp F, van der Marel G, Driessen C, Overkleeft H. Receptor-Mediated Targeting of Cathepsins in Professional Antigen Presenting Cells. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200990070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Brackman G, Hillaert U, Van Calenbergh S, Nelis HJ, Coenye T. Use of quorum sensing inhibitors to interfere with biofilm formation and development in Burkholderia multivorans and Burkholderia cenocepacia. Res Microbiol 2009; 160:144-51. [DOI: 10.1016/j.resmic.2008.12.003] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Revised: 12/09/2008] [Accepted: 12/10/2008] [Indexed: 12/11/2022]
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Hillaert U, Verdoes M, Florea B, Saragliadis A, Habets K, Kuiper J, Van Calenbergh S, Ossendorp F, van der Marel G, Driessen C, Overkleeft H. Receptor-Mediated Targeting of Cathepsins in Professional Antigen Presenting Cells. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805529] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hillaert U, Verdoes M, Florea B, Saragliadis A, Habets K, Kuiper J, Van Calenbergh S, Ossendorp F, van der Marel G, Driessen C, Overkleeft H. Receptor-Mediated Targeting of Cathepsins in Professional Antigen Presenting Cells. Angew Chem Int Ed Engl 2009; 48:1629-32. [DOI: 10.1002/anie.200805529] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Trappeniers M, Beneden KV, Decruy T, Hillaert U, Linclau B, Elewaut D, Calenbergh SV. 6′-Derivatised α-GalCer Analogues Capable of Inducing Strong CD1d-Mediated Th1-Biased NKT Cell Responses in Mice. J Am Chem Soc 2008; 130:16468-9. [DOI: 10.1021/ja8064182] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthias Trappeniers
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium, Laboratory for Molecular Immunology and Inflammation, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium, and School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Katrien Van Beneden
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium, Laboratory for Molecular Immunology and Inflammation, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium, and School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Tine Decruy
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium, Laboratory for Molecular Immunology and Inflammation, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium, and School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Ulrik Hillaert
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium, Laboratory for Molecular Immunology and Inflammation, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium, and School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Bruno Linclau
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium, Laboratory for Molecular Immunology and Inflammation, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium, and School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Dirk Elewaut
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium, Laboratory for Molecular Immunology and Inflammation, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium, and School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Serge Van Calenbergh
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium, Laboratory for Molecular Immunology and Inflammation, Ghent University Hospital, Ghent University, De Pintelaan 185, 9000 Ghent, Belgium, and School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
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Verdoes M, Florea BI, Hillaert U, Willems LI, van der Linden WA, Sae-Heng M, Filippov DV, Kisselev AF, van der Marel GA, Overkleeft HS. Azido-BODIPY acid reveals quantitative Staudinger-Bertozzi ligation in two-step activity-based proteasome profiling. Chembiochem 2008; 9:1735-8. [PMID: 18600815 DOI: 10.1002/cbic.200800231] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Martijn Verdoes
- Bio-Organic Synthesis, Leiden Institute of Chemistry, P. O. Box 9502, 2300 RA Leiden, Netherlands
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Verdoes M, Hillaert U, Florea BI, Sae-Heng M, Risseeuw MDP, Filippov DV, van der Marel GA, Overkleeft HS. Acetylene functionalized BODIPY dyes and their application in the synthesis of activity based proteasome probes. Bioorg Med Chem Lett 2007; 17:6169-71. [PMID: 17888658 DOI: 10.1016/j.bmcl.2007.09.025] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2007] [Revised: 09/03/2007] [Accepted: 09/05/2007] [Indexed: 01/26/2023]
Abstract
The synthesis of three acetylene functionalized BODIPY dyes is described. These dyes are used to fluorescently modify an azido functionalized epoxomicin analogue employing the Huisgen 1,3-dipolar cycloaddition, resulting in a panel of fluorescent epoxomicin derived proteasome probes.
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Affiliation(s)
- Martijn Verdoes
- Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
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Hillaert U, Boldin-Adamsky S, Rozenski J, Busson R, Futerman AH, Van Calenbergh S. Synthesis and biological evaluation of novel PDMP analogues. Bioorg Med Chem 2006; 14:5273-84. [PMID: 16621573 DOI: 10.1016/j.bmc.2006.03.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2005] [Revised: 03/23/2006] [Accepted: 03/27/2006] [Indexed: 11/26/2022]
Abstract
A new series of hybrid PDMP analogues, based both on PDMP and styryl analogues of natural ceramide, has been synthesized from D-serine. The synthetic route was developed such that future introduction of different aryl groups is straightforward. Biological evaluation, both in vitro on rat liver Golgi fractions as well as in HEK-293 and COS-7 cells, revealed two lead compounds with comparable inhibitory potency as PDMP, which could be elaborated to more potent inhibitors.
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Affiliation(s)
- Ulrik Hillaert
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Ghent 9000, Belgium
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12
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Hillaert U, Van Calenbergh S. Synthesis of a Versatile (S)-3-(Hydroxymethyl)butane-1,2,4-triol Building Block and its Application for the Stereoselective Synthesis of N-Homoceramides. Org Lett 2005; 7:5769-72. [PMID: 16354062 DOI: 10.1021/ol052335x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structures: see text] A versatile (S)-3-(hydroxymethyl)butane-1,2,4-triol building block has been synthesized starting from D-isoascorbic acid, a common food preservative. The key transformation in this approach was the introduction of branching through a high yield and fully regioselective epoxide opening. This flexible synthon has been elaborated to a new class of (dihydro-)N-homo(phyto)ceramides.
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Affiliation(s)
- Ulrik Hillaert
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, B-9000 Ghent, Belgium
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13
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Oltenfreiter R, Staelens L, Hillaert U, Heremans A, Noël A, Frankenne F, Slegers G. Synthesis, radiosynthesis, in vitro and preliminary in vivo evaluation of biphenyl carboxylic and hydroxamic matrix metalloproteinase (MMP) inhibitors as potential tumor imaging agents. Appl Radiat Isot 2005; 62:903-13. [PMID: 15799868 DOI: 10.1016/j.apradiso.2004.12.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2004] [Revised: 12/17/2004] [Accepted: 12/18/2004] [Indexed: 11/23/2022]
Abstract
Excess matrix degradation is one of the hallmarks of cancer and is an important factor in the process of tumor progression. It is implicated in invasion, metastasis, growth, angiogenesis and migration. Many characteristics of matrix metalloproteinases (MMPs) make them attractive therapeutic and diagnostic targets. MMP expression is upregulated at the tumor site, with localization of activity in the tumor or the surrounding stroma, providing a target for medical imaging techniques. Radioiodinated carboxylic and hydroxamic MMP inhibitors 2-(4'-[123I] iodo-biphenyl-4-sulfonylamino)-3-methyl-butyric acid (9) and 2-(4'-[123I] iodo-biphenyl-4-sulfonylamino)-3-methyl-butyramide (11), their unlabelled standards and precursors were synthesized. Radioiodination was conducted by electrophilic aromatic substitution of the tributylstannyl precursors and resulted in radiochemical yields of 70+/-5% (n=6) and 60+/-5% (n=4), respectively. In vitro zymography and enzyme assays showed for both hydroxamic acid and carboxylic acid compounds a good inhibition activity and a high selectivity for MMP-2. In vivo biodistribution in NMRI mice showed no long-term accumulation in organs and the possibility to accumulate in the tumor in a later phase of this study.
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Affiliation(s)
- Ruth Oltenfreiter
- Laboratory of Radiopharmacy, Ghent University, Harelbekestraat 72, 9000 Ghent, Belgium.
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Baert K, Croubels S, Maes A, Hillaert U, Van Calenbergh S, De Backer P. Comparative metabolic excretion profile of sodium salicylate in broiler chickens and homing pigeons. J Vet Pharmacol Ther 2004; 27:123-7. [PMID: 15096112 DOI: 10.1111/j.1365-2885.2004.00554.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- K Baert
- Department of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
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15
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Hillaert U, Baert K, Rozenski J, Croubels S, De Keukeleire D, De Backer P, Van Calenbergh S. 2,5-Bis-(2-hydroxybenzoylamino)pentanoic acid, a salicylic acid-metabolite isolated from chicken: characterization and independent synthesis. Bioorg Med Chem Lett 2003; 13:335-7. [PMID: 12565924 DOI: 10.1016/s0960-894x(02)01021-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
From excreta of chickens that had been treated with sodium salicylate, a new compound was detected and identified as a double conjugated ornithine metabolite. The structural assignment of this metabolite was further confirmed by an independent efficient 3-step synthesis from ornithine.
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Affiliation(s)
- Ulrik Hillaert
- Ghent University, Faculty of Pharmaceutical Sciences, Laboratory for Medicinal Chemistry, Harelbekestraat 72, B-9000 Ghent, Belgium
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De Jonghe S, Lamote I, Venkataraman K, Boldin SA, Hillaert U, Rozenski J, Hendrix C, Busson R, De Keukeleire D, Van Calenbergh S, Futerman AH, Herdewijn P. Synthesis of homoceramides, novel ceramide analogues, and their lack of effect on the growth of hippocampal neurons. J Org Chem 2002; 67:988-96. [PMID: 11856049 DOI: 10.1021/jo011062q] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of a new series of D-erythro-homoceramide analogues is described. Several synthetic approaches were investigated. Homoceramides can be successfully synthesized from L-homoserine as chiral building block and a protected Weinreb-amide as a key intermediate. The synthesis of short-chain analogues with a heptyl side chain, as well as with a phenyl residue in the sphingoid part (instead of the naturally occurring tridecyl side chain), was effected. The homoceramides 15-17 and 24 were investigated for their potential to reverse the inhibitory effect of fumonisin B(1) on axonal growth. Unfortunately, none of the tested compounds showed any biological activity due to their lack of metabolism to glucosylhomoceramide.
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Affiliation(s)
- Steven De Jonghe
- Ghent University, Faculty of Pharmaceutical Sciences, Laboratory of Medicinal Chemistry, Harelbekestraat 72, 9000 Gent, Belgium
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