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Moens E, Bolca S, Van de Wiele T, Van Landschoot A, Goeman JL, Possemiers S, Verstraete W. Exploration of isoxanthohumol bioconversion from spent hops into 8-prenylnaringenin using resting cells of Eubacterium limosum. AMB Express 2020; 10:79. [PMID: 32333233 PMCID: PMC7182650 DOI: 10.1186/s13568-020-01015-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 04/17/2020] [Indexed: 11/10/2022] Open
Abstract
Hops is an almost unique source of the potent phytoestrogen 8-prenylnaringenin (8-PN). As hops contain only low levels of 8-PN, synthesis may be more attractive than extraction. A strain of the Gram-positive Eubacterium limosum was isolated previously for 8-PN production from more abundant precursor isoxanthohumol (IX) from hops. In this study, spent hops, an industrial side stream from the beer industry, was identified as interesting source of IX. Yet, hop-derived compounds are well-known antibacterial agents and the traces of a large variety of different compounds in spent hops interfered with growth and IX conversion. Critical factors to finally enable bacterial 8-PN production from spent hops, using a food and feed grade medium, were evaluated in this research. The use of bacterial resting cells and complex medium at a pH of 7.8-8 best fulfilled the requirements for 8-PN production and generated a solid basis for development of an economic process.
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Affiliation(s)
- Esther Moens
- ProDigest BVBA, Technol Pk 82, 9052, Ghent, Belgium
- Ugent, CMET, Coupure Links 653, 9000, Ghent, Belgium
| | - Selin Bolca
- ProDigest BVBA, Technol Pk 82, 9052, Ghent, Belgium
| | | | | | - Jan L Goeman
- Ugent, Dept Organic and Macromolecular Chemistry, Krijgslaan 281-S4, 9000, Ghent, Belgium
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Popović V, Goeman JL, Bougarne N, Eyckerman S, Heyerick A, De Bosscher K, Van der Eycken J. Involvement of the Glucocorticoid Receptor in Pro-inflammatory Transcription Factor Inhibition by Daucane Esters from Laserpitium zernyi. J Nat Prod 2017; 80:1505-1513. [PMID: 28489375 DOI: 10.1021/acs.jnatprod.7b00012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Species of the genus Laserpitium have been used traditionally to treat inflammation and infection. From the herb of Laserpitium zernyi, six new compounds were isolated and their structures elucidated (using IR, NMR, HRMS data) as derivatives of 8-daucene-2,4,10-triol (1, 2, and 4), 7-daucene-2,4,10-triol (3), a lapiferin derivative featuring a C-2 ester moiety (5), and a daucane featuring an exomethylene group at C-8 (6). Also isolated were the rare daucanes vaginatin (7) and laserpitin (8). In a search for selective glucocorticoid receptor (GR) modulators, the compounds were tested for their capacity to inhibit NF-κB and AP-1 pro-inflammatory factors and for a potential competitive effect on a dexamethasone (Dex)-induced GR-driven glucocorticoid response element (GRE) reporter gene. The new 2β-angeloyloxy-10α-acetoxy-8-daucene-2,4,10-triol (2) significantly inhibited transactivation of both NF-κB and AP-1, while vaginatin (7) was the most active of the compounds tested in blocking AP-1. Both compounds competitively repressed Dex-induced GRE-driven promoter activities, indicative of a potential role for GR. In addition, a decreased potential to inhibit NF-κB was apparent in GR knockout A549 cells. In line with the transcriptional assays, compounds 2 and 7 also significantly lowered CCL-2 chemokine production, albeit to a lesser extent than Dex. The results suggest that daucanes may be interesting candidates in the search for compounds with GR-modulating activities.
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Affiliation(s)
- Višnja Popović
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Jan L Goeman
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
| | - Nadia Bougarne
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Sven Eyckerman
- Department of Biochemistry, Ghent University , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
- VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Arne Heyerick
- Reliable Cancer Therapies , Boechoutlaan 221, B-1853 Strombeek-Bever, Belgium
| | - Karolien De Bosscher
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
- Department of Biochemistry, Ghent University , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
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Caroen J, Clemmen A, Kámán J, Backaert F, Goeman JL, Fülöp F, Van der Eycken J. Solid-phase synthesis of 6,7-cycloalkane-fused 1,4-diazepane-2,5-diones via a cyclization/release strategy. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Murlykina MV, Sakhno YI, Desenko SM, Shishkina SV, Shishkin OV, Sysoiev DO, Kornet MN, Schols D, Goeman JL, Van der Eycken J, Van der Eycken EV, Chebanov VA. Study of the Chemoselectivity of Multicomponent Heterocyclizations Involving 3-Amino-1,2,4-triazole and Pyruvic Acids as Key Reagents, and Biological Activity of the Reaction Products. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500469] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Peshkov AA, Nechaev AA, Pereshivko OP, Goeman JL, Van der Eycken J, Peshkov VA, Van der Eycken EV. Gold- and Silver-Catalyzed 7-endo-digCyclizations for the Synthesis of Oxazepines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500357] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bert K, Noël T, Kimpe W, Goeman JL, Van der Eycken J. Chiral imidate–ferrocenylphosphanes: synthesis and application as P,N-ligands in iridium(i)-catalyzed hydrogenation of unfunctionalized and poorly functionalized olefins. Org Biomol Chem 2012; 10:8539-50. [DOI: 10.1039/c2ob25871d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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De Bruyne S, Boos TL, Wyffels L, Goeman JL, Rice KC, De Vos F. Synthesis, radiosynthesis and in vivo evaluation of [I]-4-(2-(bis(4-fluorophenyl)methoxy)ethyl)-1-(4-iodobenzyl)piperidine as a selective tracer for imaging the dopamine transporter. J Labelled Comp Radiopharm 2009; 52:304-311. [PMID: 19746191 DOI: 10.1002/jlcr.1603] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Dopamine transporter (DAT) neuroimaging is a useful tool in Parkinson's disease diagnosis, staging and follow-up providing information on the integrity of the dopaminergic neurotransmitter system in vivo. 4-(2-(Bis(4-fluorophenyl)-methoxy)ethyl)-1-(4-iodobenzyl)piperidine (7) has nanomolar affinity for DAT and better selectivity over the other monoamine transporters compared with the existing SPECT radioligands for DAT. The aim of this study was to synthesize and evaluate [(123)I]-7 as an in vivo tracer for DAT.The tributylstannyl precursor was synthesized with an overall yield of 25%. [(123)I]-7 was synthesized by electrophilic destannylation with a yield of 40±10%. Radiochemical purity appeared to be >98%, whereas specific activity was at least 667 GBq/μmol. Biodistribution studies in mice showed brain uptake of 0.96±0.53%ID/g at 30 s post injection (p.i.) and 0.26±0.02%ID/g at 3 h p.i. High blood activity was observed at all time points. Pretreatment with Cyclosporin A raised brain uptake indicating that [(123)I]-7 is transported by P-glycoprotein (P-gp) pumps. In rats, regional brain distribution of [(123)I]-7 was not in agreement with DAT distribution. These results indicate that [(123)I]-7 is not suitable for mapping DAT in vivo but could be a useful tracer for the P-gp transporter.
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Affiliation(s)
- S De Bruyne
- Laboratory for Radiopharmacy, Ghent University, Harelbekestraat 72, B-9000 Ghent, Belgium
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Devreux V, Wiesner J, Goeman JL, Van der Eycken J, Jomaa H, Van Calenbergh S. Synthesis and Biological Evaluation of Cyclopropyl Analogues of Fosmidomycin as Potent Plasmodium falciparum Growth Inhibitors. J Med Chem 2006; 49:2656-60. [PMID: 16610809 DOI: 10.1021/jm051177c] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [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
A series of fosmidomycin analogues featuring restricted conformational mobility has been synthesized and evaluated as inhibitors of 1-deoxy-D-xylulose 5-phosphate (DOXP) reductoisomerase and as growth inhibitors of P. falciparum. The enantiomerically pure trans-cyclopropyl N-acetyl analogue 3b showed comparable inhibitory activity as fosmidomycin toward E. coli DOXP reductoisomerase and proved equally active when tested in vitro for P. falciparum growth inhibition. Conversely, the alpha-phenyl cis-cyclopropyl analogue 4 showed virtually no inhibition of the enzyme.
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Affiliation(s)
- Vincent Devreux
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium
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Morreel K, Ralph J, Lu F, Goeminne G, Busson R, Herdewijn P, Goeman JL, Van der Eycken J, Boerjan W, Messens E. Phenolic profiling of caffeic acid O-methyltransferase-deficient poplar reveals novel benzodioxane oligolignols. Plant Physiol 2004; 136:4023-36. [PMID: 15563622 PMCID: PMC535834 DOI: 10.1104/pp.104.049312] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2004] [Revised: 09/28/2004] [Accepted: 09/28/2004] [Indexed: 05/18/2023]
Abstract
Caffeic acid O-methyltransferase (COMT) catalyzes preferentially the methylation of 5-hydroxyconiferaldehyde to sinapaldehyde in monolignol biosynthesis. Here, we have compared HPLC profiles of the methanol-soluble phenolics fraction of xylem tissue from COMT-deficient and control poplars (Populus spp.), using statistical analysis of the peak heights. COMT down-regulation results in significant concentration differences for 25 of the 91 analyzed peaks. Eight peaks were exclusively detected in COMT-deficient poplar, of which four could be purified for further identification using mass spectrometry/mass spectrometry, nuclear magnetic resonance, and spiking of synthesized reference compounds. These new compounds were derived from 5-hydroxyconiferyl alcohol or 5-hydroxyconiferaldehyde and were characterized by benzodioxane moieties, a structural type that is also increased in the lignins of COMT-deficient plants. One of these four benzodioxanes amounted to the most abundant oligolignol in the HPLC profile. Furthermore, all of the differentially accumulating oligolignols involving sinapyl units were either reduced in abundance or undetectable. The concentration levels of all identified oligolignols were in agreement with the relative supply of monolignols and with their chemical coupling propensities, which supports the random coupling hypothesis. Chiral HPLC analysis of the most abundant benzodioxane dimer revealed the presence of both enantiomers in equal amounts, indicating that they were formed by radical coupling reactions under simple chemical control rather than guided by dirigent proteins.
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Affiliation(s)
- Kris Morreel
- Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, B-9052 Ghent, Belgium
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Steelant WF, Goeman JL, Philippé J, Oomen LC, Hilkens J, Krzewinski-Recchi MA, Huet G, Van der Eycken J, Delannoy P, Bruyneel EA, Mareel MM. Alkyl-lysophospholipid 1-O-octadecyl-2-O-methyl- glycerophosphocholine induces invasion through episialin-mediated neutralization of E-cadherin in human mammary MCF-7 cells in vitro. Int J Cancer 2001; 92:527-36. [PMID: 11304687 DOI: 10.1002/ijc.1216] [Citation(s) in RCA: 15] [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] [Indexed: 12/12/2022]
Abstract
1-O-octadecyl-2-O-methyl-glycerophosphocholine (ET-18-OMe) is an analogue of the naturally occurring 2-lysophosphatidylcholine belonging to the class of antitumor lipids. Previously, we demonstrated that ET-18-OMe modulates cell-cell adhesion of human breast cancer MCF-7 cells. In the present study, we tested the effect of ET-18-OMe on adhesion, invasion and localisation of episialin and E-cadherin in MCF-7/AZ cells expressing a functional E-cadherin/catenin complex. The MCF-7/6 human breast cancer cells were used as negative control since their E-cadherin/catenin complex is functional in cells grown on solid substrate but not in suspension. The function of E-cadherin, a calcium-dependent transmembrane cell-cell adhesion and signal-transducing molecule, is disturbed in invasive cancers by mutation, loss of mRNA stability, proteolytic degradation, tyrosine phosphorylation of associated proteins and large cell-associated proteoglycans or mucin-like molecules such as episialin. Episialin, also called MUC1, is an anti-adhesion molecule that by its large number of glycosylated tandem repeats can sterically hinder the adhesive properties of other glycoproteins. ET-18-OMe inhibited the E-cadherin functions of MCF-7/AZ cells as measured by inhibition of fast and slow aggregation and by the induction of collagen invasion. These effects were enhanced by MB2, an antibody against E-cadherin and blocked by monoclonal antibodies (MAbs) 214D4 or M8 against episialin. ET-18-OMe had no influence on tyrosine phosphorylation of beta-catenin and the E-cadherin/catenin complex remained intact. Transcription, translation, protein turnover and cell surface localisation of episialin were not altered. ET-18-OMe induced finger-like extensions with clustering of episialin together with E-cadherin and carcinoembryonic antigen but not with occludin. In cells in suspension, ET-18-OMe caused a shift in the flow-cytometric profile of episialin toward a lower intensity for MCF-7/AZ cells. In contrast with MCF-7/AZ cells, the adhesion-deficient and noninvasive MCF-7/6 cells showed neither morphotypic changes nor induction of aggregation nor invasion in collagen I upon treatment with ET-18-OMe. Co-localisation of episialin with E-cadherin was rarely observed. We conclude that in the human breast cancer cells MCF-7/AZ, E-cadherin and episialin are key molecular players in the regulation of promotion and suppression of cell-cell adhesion and invasion.
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Affiliation(s)
- W F Steelant
- Laboratory of Experimental Cancerology, Ghent University Hospital, Gent, Belgium
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Van der Eycken E, Terryn N, Goeman JL, Carlens G, Nerinckx W, Claeyssens M, Van der Eycken J, Van Montagu M, Brito-Arias M, Engler G. Sudan-β-d-glucuronides and their use for the histochemical localization of β-glucuronidase activity in transgenic plants. Plant Cell Rep 2000; 19:966-970. [PMID: 30754840 DOI: 10.1007/s002990000219] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Synthesis of five different Sudan-β-D-glucuronides (I, II, III, IV, and RedB) was performed by condensation of a set of red Sudan diazo dyes with methyl (1-deoxy-2,3,4-tri-O-acetyl-1-trichloroacetimidoyl-α-D-glucopyran)uronate. After the acid and alcohol groups had been deprotected, the resulting compounds were used for histochemical localization of β-glucuronidase (GUS) activity in transgenic plants (Petunia hybrida, Arabidopsis thaliana, and Nicotiana tabacum) that contained the GUS reporter system. Because the cleavage of the β-glucuronide results in the liberation of an insoluble Sudan dye, Sudan substrates gave no diffusion artifacts as described for the commonly used 5-bromo-4-chloro-3-indolyl-β-D-glucuronide (X-gluc). A comparison of assays with different Sudan glucuronides and X-gluc demonstrated that the SudanIV variant is a valuable glucuronide substrate for the precise histochemical localization of GUS activity in transgenic plants.
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Affiliation(s)
- E Van der Eycken
- Vakgroep Moleculaire Genetica & Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - N Terryn
- Vakgroep Moleculaire Genetica & Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - J L Goeman
- Vakgroep Moleculaire Genetica & Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - G Carlens
- Vakgroep Moleculaire Genetica & Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - W Nerinckx
- Vakgroep Biochemie, Fysiologie en Microbiologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - M Claeyssens
- Vakgroep Biochemie, Fysiologie en Microbiologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - J Van der Eycken
- Vakgroep Organische Chemie, Universiteit Gent, Krijgslaan 281 (S.4), 9000 Gent, Belgium e-mail: Fax: +32-9-264-49-98, , , , , , BE
| | - M Van Montagu
- Vakgroep Moleculaire Genetica & Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - M Brito-Arias
- Vakgroep Moleculaire Genetica & Departement Plantengenetica, Vlaams Interuniversitair Instituut voor Biotechnologie, Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
| | - G Engler
- Laboratoire Associé de l'Institut National de la Recherche Agronomique (France), Universiteit Gent, 9000 Gent, Belgium, , , , , , BE
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