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Guanidine Alkaloids from the Marine Sponge Monanchora pulchra Show Cytotoxic Properties and Prevent EGF-Induced Neoplastic Transformation in Vitro. Mar Drugs 2016; 14:md14070133. [PMID: 27428983 PMCID: PMC4962023 DOI: 10.3390/md14070133] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 07/05/2016] [Accepted: 07/08/2016] [Indexed: 12/13/2022] Open
Abstract
Guanidine alkaloids from sponges Monanchora spp. represent diverse bioactive compounds, however, the mechanisms underlying bioactivity are very poorly understood. Here, we report results of studies on cytotoxic action, the ability to inhibit EGF-induced neoplastic transformation, and the effects on MAPK/AP-1 signaling of eight rare guanidine alkaloids, recently isolated from the marine sponge Monanchora pulchra, namely: monanchocidin A (1), monanchocidin B (2), monanchomycalin C (3), ptilomycalin A (4), monanchomycalin B (5), normonanchocidin D (6), urupocidin A (7), and pulchranin A (8). All of the compounds induced cell cycle arrest (apart from 8) and programmed death of cancer cells. Ptilomycalin A-like compounds 1–6 activated JNK1/2 and ERK1/2, following AP-1 activation and caused p53-independent programmed cell death. Compound 7 induced p53-independent cell death without activation of AP-1 or caspase-3/7, and the observed JNK1/2 activation did not contribute to the cytotoxic effect of the compound. Alkaloid 8 induced JNK1/2 (but not ERK1/2) activation leading to p53-independent cell death and strong suppression of AP-1 activity. Alkaloids 1–4, 7, and 8 were able to inhibit the EGF-induced neoplastic transformation of JB6 P+ Cl41 cells. Our results suggest that investigated guanidine marine alkaloids hold potential to eliminate human cancer cells and prevent cancer cell formation and spreading.
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Soto M, Espinoza L, Chávez MI, Díaz K, Olea AF, Taborga L. Synthesis of New Hydrated Geranylphenols and in Vitro Antifungal Activity against Botrytis cinerea. Int J Mol Sci 2016; 17:ijms17060840. [PMID: 27271604 PMCID: PMC4926374 DOI: 10.3390/ijms17060840] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 05/12/2016] [Accepted: 05/25/2016] [Indexed: 02/07/2023] Open
Abstract
Geranylated hydroquinones and other geranylated compounds isolated from Aplydium species have shown interesting biological activities. This fact has prompted a number of studies where geranylated phenol derivatives have been synthesized in order to assay their bioactivities. In this work, we report the synthesis of a series of new hydrated geranylphenols using two different synthetic approaches and their inhibitory effects on the mycelial growth of Botrytis cinerea. Five new hydrated geranylphenols were obtained by direct coupling reaction between geraniol and phenol in dioxane/water and using BF3·Et2O as the catalyst or by the reaction of a geranylated phenol with BF3·Et2O. Two new geranylated quinones were also obtained. The synthesis and structural elucidation of all new compounds is presented. All hydrated geranylphenols efficiently inhibit the mycelial growth of B. cinerea. Their activity is higher than that observed for non-hydrated compounds. These results indicate that structural modification on the geranyl chain brings about an enhancement of the inhibition effect of geranylated phenol derivatives.
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Affiliation(s)
- Mauricio Soto
- Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile.
| | - Luis Espinoza
- Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile.
| | - María I Chávez
- Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile.
| | - Katy Díaz
- Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile.
| | - Andrés F Olea
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Santiago 8910339, Chile.
| | - Lautaro Taborga
- Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso 2340000, Chile.
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Aaptamines from the marine sponge Aaptos sp. display anticancer activities in human cancer cell lines and modulate AP-1-, NF-κB-, and p53-dependent transcriptional activity in mouse JB6 Cl41 cells. BIOMED RESEARCH INTERNATIONAL 2014; 2014:469309. [PMID: 25215281 PMCID: PMC4158141 DOI: 10.1155/2014/469309] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 06/02/2014] [Accepted: 07/11/2014] [Indexed: 12/19/2022]
Abstract
Aaptamine (8,9-dimethoxy-1H-benzo[de][1,6]naphthyridine) is a marine natural compound possessing antioxidative, antimicrobial, antifungal, and antiretroviral activity. Earlier, we have found that aaptamine and its derivatives demonstrate equal anticancer effects against the human germ cell cancer cell lines NT2 and NT2-R and cause some changes in the proteome of these cells. In order to explore further the mechanism of action of aaptamine and its derivatives, we studied the effects of aaptamine (1), demethyl(oxy)aaptamine (2), and isoaaptamine (3) on human cancer cell lines and on AP-1-, NF-κB-, and p53-dependent transcriptional activity in murine JB6 Cl41 cells. We showed that compounds 1–3 demonstrate anticancer activity in THP-1, HeLa, SNU-C4, SK-MEL-28, and MDA-MB-231 human cancer cell lines. Additionally, all compounds were found to prevent EGF-induced neoplastic transformation of murine JB6 Cl41 cells. Nuclear factors AP-1, NF-κB, and p53 are involved in the cellular response to high and nontoxic concentrations of aaptamine alkaloids 1–3. Furthermore, inhibition of EGF-induced JB6 cell transformation, which is exerted by the compounds 1–3 at low nontoxic concentrations of 0.7–2.1 μM, cannot be explained by activation of AP-1 and NF-κB.
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Quinone and hydroquinone metabolites from the ascidians of the genus Aplidium. Mar Drugs 2014; 12:3608-33. [PMID: 24927227 PMCID: PMC4071593 DOI: 10.3390/md12063608] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 06/03/2014] [Accepted: 06/04/2014] [Indexed: 11/16/2022] Open
Abstract
Ascidians of the genus Aplidium are recognized as an important source of chemical diversity and bioactive natural products. Among the compounds produced by this genus are non-nitrogenous metabolites, mainly prenylated quinones and hydroquinones. This review discusses the isolation, structural elucidation, and biological activities of quinones, hydroquinones, rossinones, longithorones, longithorols, floresolides, scabellones, conicaquinones, aplidinones, thiaplidiaquinones, and conithiaquinones. A compilation of the 13C-NMR spectral data of these compounds is also presented.
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Meroterpenes from marine invertebrates: structures, occurrence, and ecological implications. Mar Drugs 2013; 11:1602-43. [PMID: 23685889 PMCID: PMC3707164 DOI: 10.3390/md11051602] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 04/07/2013] [Accepted: 05/07/2013] [Indexed: 11/29/2022] Open
Abstract
Meroterpenes are widely distributed among marine organisms; they are particularly abundant within brown algae, but other important sources include microorganisms and invertebrates. In the present review the structures and bioactivities of meroterpenes from marine invertebrates, mainly sponges and tunicates, are summarized. More than 300 molecules, often complex and with unique skeletons originating from intra- and inter-molecular cyclizations, and/or rearrangements, are illustrated. The reported syntheses are mentioned. The issue of a potential microbial link to their biosynthesis is also shortly outlined.
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The Extracts of Some Marine Invertebrates and Algae Collected off the Coast Waters of Vietnam Induce the Inhibitory Effects on the Activator Protein-1 Transcriptional Activity in JB6 Cl41 Cells. J CHEM-NY 2013. [DOI: 10.1155/2013/896709] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
It has previously been shown that inhibition of the transcriptional activity of the oncogenic nuclear factor AP-1 can result in cancer prevention. Marine invertebrates and alga are a rich source of natural compounds that possess various biological activities. The inhibitory effects of the extracts of Vietnamese marine organisms in relation to the AP-1 transcriptional activity were examined by the luciferase method using JB6 Cl41 cells stably expressing a luciferase reporter gene controlled by AP-1 DNA binding sequence. As was found, 71 species of marine sponges out of 148 species studied contain inhibitors of the AP-1 transcriptional activity. Therefore, marine organisms as a source of biologically active compounds have a great potential for isolation of the new cancer preventive compounds that inhibit the oncogenic AP-1 nuclear factor.
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Cimmino A, Andolfi A, Zonno MC, Troise C, Santini A, Tuzi A, Vurro M, Ash G, Evidente A. Phomentrioloxin: A phytotoxic pentasubstituted geranylcyclohexentriol produced by Phomopsis sp., a potential mycoherbicide for Carthamus lanatus Biocontrol. JOURNAL OF NATURAL PRODUCTS 2012; 75:1130-1137. [PMID: 22694489 DOI: 10.1021/np300200j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new phytotoxic geranylcyclohexenetriol, named phomentrioloxin, was isolated from the liquid culture of Phomopsis sp., a fungal pathogen proposed for the biological control of Carthamus lanatus, a widespread and troublesome thistle weed belonging to the Asteraceae family causing severe crop and pastures losses in Australia. The structure of phomentrioloxin was established by spectroscopic, X-ray, and chemical methods as (1S,2S,3S,4S)-3-methoxy-6-(7-methyl-3-methylene-oct-6-en-1-ynyl)cyclohex-5-ene-1,2,4-triol. At a concentration of 6.85 mM, the toxin causes the appearance of necrotic spots when applied to leaves of both host and nonhost plants. It also causes growth and chlorophyll content reduction of fronds of Lemna minor and inhibition of tomato rootlet elongation. Finally, in preliminary bioassays, phomentrioloxin did not show any antibacterial, fungicidal, or zootoxic activities.
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Affiliation(s)
- Alessio Cimmino
- Dipartimento di Scienze del Suolo, della Pianta, dell'Ambiente e delle Produzioni Animali (DISSPAPA), Università di Napoli Federico II, Via Università 100, 80055 Portici, Italy
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Sunassee SN, Davies-Coleman MT. Cytotoxic and antioxidant marine prenylated quinones and hydroquinones. Nat Prod Rep 2012; 29:513-35. [DOI: 10.1039/c2np00086e] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Bioactive Marine Prenylated Quinones/Quinols. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/b978-0-444-53836-9.00023-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Characterization of the Biosynthesis Gene Cluster for Alkyl-O-Dihydrogeranyl-Methoxyhydroquinones in Actinoplanes missouriensis. Chembiochem 2011; 12:439-48. [DOI: 10.1002/cbic.201000628] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Indexed: 11/07/2022]
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Aiello A, Fattorusso E, Luciano P, Menna M, Calzado MA, Muñoz E, Bonadies F, Guiso M, Sanasi MF, Cocco G, Nicoletti R. Synthesis of structurally simplified analogues of aplidinone A, a pro-apoptotic marine thiazinoquinone. Bioorg Med Chem 2010; 18:719-27. [DOI: 10.1016/j.bmc.2009.11.063] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 11/20/2009] [Accepted: 11/27/2009] [Indexed: 11/24/2022]
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Blunt JW, Copp BR, Munro MHG, Northcote PT, Prinsep MR. Marine natural products. Nat Prod Rep 2010; 27:165-237. [DOI: 10.1039/b906091j] [Citation(s) in RCA: 322] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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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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Abstract
Marine natural products isolated from organisms collected from cold-water habitats are described. Emphasis is on bioactive compounds from tunicates, sponges, microbes, bryozoans, corals, algae, molluscs and echinoderms. Synthetic studies of several important classes of cold-water compounds are highlighted.
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Affiliation(s)
- Matthew D Lebar
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, CHE205, Tampa, FL, USA
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Abstract
This review covers the literature published in 2005 for marine natural products, with 704 citations (493 for the period January to December 2005) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, coelenterates, bryozoans, molluscs, tunicates and echinoderms. The emphasis is on new compounds (812 for 2005), 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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Abstract
An overview of marine natural products synthesis during 2005 is provided. In a similar vein to earlier installments in this series, the emphasis is on total syntheses of molecules of contemporary interest, new total syntheses, and syntheses that have resulted in structure confirmation or stereochemical assignments.
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Affiliation(s)
- Jonathan C Morris
- School of Chemistry and Physics, University of Adelaide, Adelaide, Australia 5005
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Fedorov SN, Radchenko OS, Shubina LK, Balaneva NN, Bode AM, Stonik VA, Dong Z. Evaluation of cancer-preventive activity and structure-activity relationships of 3-demethylubiquinone Q2, isolated from the ascidian Aplidium glabrum, and its synthetic analogs. Pharm Res 2006; 23:70-81. [PMID: 16320003 PMCID: PMC2227315 DOI: 10.1007/s11095-005-8813-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2005] [Accepted: 09/28/2005] [Indexed: 01/03/2023]
Abstract
PURPOSE 3-Demethylubiquinone Q2 was isolated from the ascidian Aplidium glabrum. The cancer-preventive properties and the structure-activity relationship for 3-demethylubiquinone Q2 and 12 of its synthetic analogs are reported. METHODS Compounds, having one or several di- or triprenyl substitutions and quinone moieties with methoxyls in different positions, were synthesized. The cancer-preventive properties of compounds and were tested in JB6 Cl41 mouse skin cells, using a variety of assessments, including the methanethiosulfonate (MTS) assay, flow cytometry, and soft agar assay. Statistical nonparametric methods were used to confirm statistical significance. RESULTS All quinones tested were shown to inhibit JB6 Cl41 cell transformation, to induce apoptosis, AP-1, and NF-kappaB activity, and to inhibit p53 activity. The most promising effects were indicated for compounds containing two isoprene units in a side chain and a methoxyl group at the para-position to a polyprenyl substitution. CONCLUSIONS Quinones and demonstrated cancer-preventive activity in JB6 Cl41 cells, which may be attributed to the induction of p53-independent apoptosis. These activities depended on the length of side chains and on the positions of the methoxyl groups in the quinone part of the molecule.
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Affiliation(s)
- Sergey N. Fedorov
- Hormel Institute, University of Minnesota, 801 16 Avenue NE, Austin, Minnesota 55912, USA
- Pacific Institute of Bioorganic Chemistry, 159 Prospect 100-let Vladivostoku, Vladivostok, 690022, Russia
| | - Oleg S. Radchenko
- Hormel Institute, University of Minnesota, 801 16 Avenue NE, Austin, Minnesota 55912, USA
| | - Larisa K. Shubina
- Hormel Institute, University of Minnesota, 801 16 Avenue NE, Austin, Minnesota 55912, USA
| | - Nadezhda N. Balaneva
- Hormel Institute, University of Minnesota, 801 16 Avenue NE, Austin, Minnesota 55912, USA
| | - Ann M. Bode
- Pacific Institute of Bioorganic Chemistry, 159 Prospect 100-let Vladivostoku, Vladivostok, 690022, Russia
| | - Valentin A. Stonik
- Hormel Institute, University of Minnesota, 801 16 Avenue NE, Austin, Minnesota 55912, USA
- To whom correspondence should be addressed. (e-mail: )
| | - Zigang Dong
- Pacific Institute of Bioorganic Chemistry, 159 Prospect 100-let Vladivostoku, Vladivostok, 690022, Russia
- To whom correspondence should be addressed. (e-mail: )
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