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Takamura K, Matsuo H, Tanaka A, Tanaka J, Fukuda T, Ishibashi F, Iwao M. Total synthesis of the marine natural products lukianols A and B. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.077] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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52
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Chen J, Chen W, Yu Y, Zhang G. One-pot synthesis of disubstituted imidazole derivatives from α-azido ketones catalyzed by potassium ethylxanthate. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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53
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Wang W, Kim H, Nam SJ, Rho BJ, Kang H. Antibacterial butenolides from the Korean tunicate Pseudodistoma antinboja. JOURNAL OF NATURAL PRODUCTS 2012; 75:2049-54. [PMID: 23145884 DOI: 10.1021/np300544a] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Six new (1, 2, and 5-8) and three known (3, 4, and 9) butenolide metabolites were isolated from the tunicate Pseudodistoma antinboja by activity-guided fractionations. The structures were elucidated by combined NMR and MS spectroscopic methods. These compounds were evaluated for their antibacterial activity, and most of them exhibited moderate to significant activity that selectively targeted Gram-positive strains and did not exhibit cytotoxicity in the MTT assay at 100 μM. Cadiolides 5-9 in particular exhibited significant antibacterial activity that was comparable to or even better than those of marketed drugs such as vancomycin and linezolid against all of the drug-resistant strains tested.
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Affiliation(s)
- Weihong Wang
- Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, Seoul National University , NS-80, Seoul, 151-747, Korea
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Sikorska J, Parker-Nance S, Davies-Coleman MT, Vining OB, Sikora AE, McPhail KL. Antimicrobial rubrolides from a South African species of Synoicum tunicate. JOURNAL OF NATURAL PRODUCTS 2012; 75:1824-7. [PMID: 23030848 PMCID: PMC3549467 DOI: 10.1021/np300580z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The CH₂Cl₂-MeOH extract of a South African tunicate described as the new Synoicum globosum Parker-Nance sp. nov. (Ascidiacea, Aplousobranchia) was subjected to ¹H NMR-guided fractionation. This resulted in the identification of new 3″-bromorubrolide F (1), 3'-bromorubrolide E (2), 3'-bromorubrolide F (3), and 3',3″-dibromorubrolide E (4) and reisolation of known rubrolides E (5) and F (6), based on NMR spectroscopic and mass spectrometric data. Biological testing of both new and known members of this reported antimicrobial family of halogenated, aryl-substituted furanones indicated moderate antibacterial properties for 3'-bromorubrolide E (2), 3',3″-dibromorubrolide E (4), and rubrolide F (6) against methicillin-resistant Staphylococcus aureus (MRSA) and S. epidermidis.
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Affiliation(s)
- Justyna Sikorska
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Building, Oregon State University, Corvallis, Oregon 97331, United States
| | - Shirley Parker-Nance
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Building, Oregon State University, Corvallis, Oregon 97331, United States
| | - Michael T. Davies-Coleman
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Building, Oregon State University, Corvallis, Oregon 97331, United States
| | - Oliver B. Vining
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Building, Oregon State University, Corvallis, Oregon 97331, United States
| | - Aleksandra E. Sikora
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Building, Oregon State University, Corvallis, Oregon 97331, United States
| | - Kerry L. McPhail
- Department of Pharmaceutical Sciences, College of Pharmacy, 203 Pharmacy Building, Oregon State University, Corvallis, Oregon 97331, United States
- Corresponding Author Tel: 541 737 5808. Fax: 541 737 3999.
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Khan ST, Yu P, Nelofar A, Ahmed Z, Chantrapromma S. 2-( N-Phenylmethanesulfonamido)ethyl 1 H-pyrrole-2-carboxylate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1125-6. [PMID: 21754438 PMCID: PMC3089296 DOI: 10.1107/s160053681101261x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 04/05/2011] [Indexed: 11/10/2022]
Abstract
In the title compound, C14H16N2O4S, the ethoxycarbonyl group is nearly planar, with an r.m.s. deviation of 0.0067 Å, and is almost coplanar with the pyrrole ring [dihedral angle = 5.81 (15)°], whereas it is inclined at a dihedral angle of 61.90 (13)° to the phenyl ring. The dihedral angle between the pyrrole and phenyl rings is 56.15 (13)°. In the crystal, centrosymmetrically related molecules are linked into dimers by pairs of N—H⋯O hydrogen bonds, forming rings of R22(10) graph-set motif. The dimers are further connected by weak intermolecular C—H⋯O hydrogen bonds and C—H⋯π interactions, forming layers parallel to the bc plane.
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Kawarada H, Yoshikawa Y, Yasui H, Kuwahara S, Habata Y, Saito R. Synthesis and in vitro insulin-mimetic activities of zinc(ii) complexes of ethyl 2,5-dihydro-4-hydroxy-5-oxo-1H-pyrrole-3-carboxylates. Metallomics 2011; 3:675-9. [DOI: 10.1039/c1mt00009h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Biochemical disorders induced by cytotoxic marine natural products in breast cancer cells as revealed by proton NMR spectroscopy-based metabolomics. Biochem Pharmacol 2010; 80:1170-9. [PMID: 20637732 DOI: 10.1016/j.bcp.2010.07.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 07/05/2010] [Accepted: 07/07/2010] [Indexed: 12/16/2022]
Abstract
Marine plants and animals are sources of a huge number of pharmacologically active compounds, some of which exhibit antineoplastic activity of clinical relevance. However the mechanism of action of marine natural products (MNPs) is poorly understood. In this study, proton NMR spectroscopy-based metabolomics was applied to unravel biochemical disorders induced in human MCF7 breast cancer cells by 3 lead candidate anticancer MNPs: ascididemin (Asc), lamellarin-D (Lam-D), and kahalalide F (KF). Asc, Lam-D, and KF provoked a severe decrease in DNA content in MCF7 cells after 24-h treatment. Asc and Lam-D provoked apoptosis, whereas KF induced non-apoptotic cell death. Metabolite profiling revealed major biochemical disorders following treatment. The response of MCF7 tumor cells to Asc involved the accumulation of citrate (x17 the control level, P<0.001), testifying enzyme blockade in citrate metabolism, and the accumulation of gluconate (x9.8, P<0.005), a metabolite never reported at such concentration in tumor cells, probably testifying glycolysis shutdown. The response to Lam-D involved the accumulation of aspartate (x7.2, P<0.05), glutamate (x14.7, P<0.05), and lactate (x2.3, P<0.05), probably in relation with the targeting of the malate-aspartate shuttle, as discussed. The response to KF involved increased lipid accumulation (polyunsaturated fatty acids x9.8, P<0.05), and phospholipid and acetate derivative alterations. Altogether, this study demonstrates the potential of proton NMR spectroscopy-based metabolomics to help uncover metabolic targets and elucidate the mechanism of cytotoxicity of candidate antineoplastic MNPs.
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Jung HA, Yoon NY, Kang SS, Kim YS, Choi JS. Inhibitory activities of prenylated flavonoids from Sophora flavescens against aldose reductase and generation of advanced glycation endproducts. J Pharm Pharmacol 2010; 60:1227-36. [DOI: 10.1211/jpp.60.9.0016] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Important targets for the prevention and treatment of diabetic complications include aldose reductase (AR) inhibitors (ARIs) and inhibitors of advanced glycation endproduct (AGE) formation. Here we evaluate the inhibitory activities of prenylated flavonoids isolated from Sophora flavescens, a traditional herbal medicine, on rat lens AR (RLAR), human recombinant AR (HRAR) and AGE formation. Among the tested compounds, two prenylated chalcones — desmethylanhydroicaritin (1) and 8-lavandulylkaempferol (2) — along with five prenylated flavanones — kurarinol (8), kurarinone (9), (2S)-2′-methoxykurarinone (10), (2S)-3β,7,4′-trihydroxy-5-methoxy-8-(γ,γ-dimethylally)-flavanone (11), and kushenol E (13) were potent inhibitors of RLAR, with IC50 values of 0.95, 3.80, 2.13, 2.99, 3.77, 3.63 and 7.74 μM, respectively, compared with quercetin (IC50 7.73 μM). In the HRAR assay, most of the prenylated flavonoids tested showed marked inhibitory activity compared with quercetin (IC50 2.54 μM). In particular, all tested prenylated flavonols, such as desmethylanhydroicaritin (1, IC50 0.45 μM), 8-lavandulylkaempferol (2, IC50 0.79 μM) and kushenol C (3, IC50 0.85 μM), as well as a prenylated chalcone, kuraridin (5, IC50 0.27 μM), and a prenylated flavanone, (2S)-7,4′-dihydroxy-5-methoxy-8-(γ,γ-dimethylally)-flavanone (12, IC50 0.37 μM), showed significant inhibitory activities compared with the potent AR inhibitor epalrestat (IC50 0.28 μM). Interestingly, prenylated flavonoids 1 (IC50 104.3 μgmL−1), 2 (IC50 132.1 μgmL−1), 3 (IC50 84.6 μgmL−1) and 11 (IC50 261.0 μgmL−1), which harbour a 3-hydroxyl group, also possessed good inhibitory activity toward AGE formation compared with the positive control aminoguanidine (IC50 115.7 μgmL−1). Thus, S. flavescens and its prenylated flavonoids inhibit the processes that underlie diabetic complications and related diseases and may therefore have therapeutic benefit.
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Affiliation(s)
- Hyun Ah Jung
- Division of Food Science and Biotechnology, Pukyong National University, Busan 608–737, South Korea
| | - Na Young Yoon
- Division of Food Science and Biotechnology, Pukyong National University, Busan 608–737, South Korea
| | - Sam Sik Kang
- Department of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151–742, South Korea
| | - Yeong Shik Kim
- Department of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151–742, South Korea
| | - Jae Sue Choi
- Division of Food Science and Biotechnology, Pukyong National University, Busan 608–737, South Korea
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Jung HA, Kim YS, Choi JS. Quantitative HPLC analysis of two key flavonoids and inhibitory activities against aldose reductase from different parts of the Korean thistle, Cirsium maackii. Food Chem Toxicol 2009; 47:2790-7. [DOI: 10.1016/j.fct.2009.08.014] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 07/29/2009] [Accepted: 08/31/2009] [Indexed: 11/25/2022]
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Wang Z, Ling B, Zhang R, Suo Y, Liu Y, Yu Z, Liu C. Docking and molecular dynamics studies toward the binding of new natural phenolic marine inhibitors and aldose reductase. J Mol Graph Model 2009; 28:162-9. [PMID: 19616461 DOI: 10.1016/j.jmgm.2009.06.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 06/05/2009] [Accepted: 06/13/2009] [Indexed: 11/29/2022]
Abstract
Phenolic marine natural product is a kind of new potential aldose reductase inhibitors (ARIs). In order to investigate the binding mode and inhibition mechanism, molecular docking and dynamics studies were performed to explore the interactions of six phenolic inhibitors with human aldose reductase (hALR2). Considering physiological environment, all the neutral and other two ionized states of each phenolic inhibitor were adopted in the simulation. The calculations indicate that all the inhibitors are able to form stable hydrogen bonds with the hALR2 active pocket which is mainly constructed by residues TYR48, HIS110 and TRP111, and they impose the inhibition effect by occupying the active space. In all inhibitors, only La and its two ionized derivatives La_ion1 and La_ion2, in which neither of the ortho-hydrogens of 3-hydroxyl is substituted by Br, bind with hALR2 active residues using the terminal 3-hydroxyl. While, all the other inhibitors, at least one of whose ortho-sites of 3- and 6-hydroxyls are substituted by Br substituent which take much electron-withdrawing effect and steric hindrance, bind with hALR2 through the lactone group. This means that the Br substituent can effectively regulate the binding modes of phenolic inhibitors. Although the lactone bound inhibitors have relatively high RMSD values, our dynamics study shows that both binding modes are of high stability. For each inhibitor molecule, the ionization does not change its original binding mode, but it does gradually increase the binding free energy, which reveals that besides hydrogen bonds, the electrostatic effect is also important to the inhibitor-hALR2 interaction.
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Affiliation(s)
- Zhiguo Wang
- Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai 810001, China
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Saito R, Tokita M, Uda K, Ishikawa C, Satoh M. Synthesis and in vitro evaluation of botryllazine B analogues as a new class of inhibitor against human aldose reductase. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.01.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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63
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Mayer AMS, Rodríguez AD, Berlinck RGS, Hamann MT. Marine pharmacology in 2005-6: Marine compounds with anthelmintic, antibacterial, anticoagulant, antifungal, anti-inflammatory, antimalarial, antiprotozoal, antituberculosis, and antiviral activities; affecting the cardiovascular, immune and nervous systems, and other miscellaneous mechanisms of action. Biochim Biophys Acta Gen Subj 2009; 1790:283-308. [PMID: 19303911 DOI: 10.1016/j.bbagen.2009.03.011] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 03/09/2009] [Accepted: 03/12/2009] [Indexed: 01/03/2023]
Abstract
BACKGROUND The review presents the 2005-2006 peer-reviewed marine pharmacology literature, and follows a similar format to the authors' 1998-2004 reviews. The preclinical pharmacology of chemically characterized marine compounds isolated from marine animals, algae, fungi and bacteria is systematically presented. RESULTS Anthelmintic, antibacterial, anticoagulant, antifungal, antimalarial, antiprotozoal, antituberculosis and antiviral activities were reported for 78 marine chemicals. Additionally 47 marine compounds were reported to affect the cardiovascular, immune and nervous system as well as possess anti-inflammatory effects. Finally, 58 marine compounds were shown to bind to a variety of molecular targets, and thus could potentially contribute to several pharmacological classes. CONCLUSIONS Marine pharmacology research during 2005-2006 was truly global in nature, involving investigators from 32 countries, and the United States, and contributed 183 marine chemical leads to the research pipeline aimed at the discovery of novel therapeutic agents. GENERAL SIGNIFICANCE Continued preclinical and clinical research with marine natural products demonstrating a broad spectrum of pharmacological activity will probably result in novel therapeutic agents for the treatment of multiple disease categories.
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Affiliation(s)
- Alejandro M S Mayer
- Department of Pharmacology, Chicago College of Osteopathic Medicine, Midwestern University, Downers Grove, IL 60515, USA.
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Jung HA, Jung YJ, Yoon NY, Jeong DM, Bae HJ, Kim DW, Na DH, Choi JS. Inhibitory effects of Nelumbo nucifera leaves on rat lens aldose reductase, advanced glycation endproducts formation, and oxidative stress. Food Chem Toxicol 2008; 46:3818-26. [DOI: 10.1016/j.fct.2008.10.004] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2008] [Accepted: 10/01/2008] [Indexed: 10/21/2022]
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65
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Jung HA, Yoon NY, Bae HJ, Min BS, Choi JS. Inhibitory activities of the alkaloids from Coptidis Rhizoma against aldose reductase. Arch Pharm Res 2008; 31:1405-12. [DOI: 10.1007/s12272-001-2124-z] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2008] [Revised: 07/15/2008] [Accepted: 11/06/2008] [Indexed: 01/31/2023]
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66
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Agafonova IG, Radchenko OS, Novikov VL, Aminin DL, Stonik VA. Magnetic resonance imaging of mouse Ehrlich carcinoma growth inhibition by thiacarpine, an analogue of cytotoxic marine alkaloid polycarpine. Magn Reson Imaging 2008; 26:763-9. [DOI: 10.1016/j.mri.2008.01.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 01/15/2008] [Accepted: 01/28/2008] [Indexed: 10/22/2022]
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67
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Blunt JW, Copp BR, Hu WP, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2008; 25:35-94. [PMID: 18250897 DOI: 10.1039/b701534h] [Citation(s) in RCA: 284] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review covers the literature published in 2006 for marine natural products, with 758 citations (534 for the period January to December 2006) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, cnidaria, bryozoans, molluscs, tunicates and echinoderms. The emphasis is on new compounds (779 for 2006), together with their relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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Fan H, Peng J, Hamann MT, Hu JF. Lamellarins and related pyrrole-derived alkaloids from marine organisms. Chem Rev 2008; 108:264-87. [PMID: 18095718 PMCID: PMC4928200 DOI: 10.1021/cr078199m] [Citation(s) in RCA: 835] [Impact Index Per Article: 52.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | | | | | - Jin-Feng Hu
- To whom correspondence should be addressed. Phone: +86-21-62237510. Fax: +86-21-62606791.
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