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Festa C, De Marino S, Zampella A, Fiorucci S. Theonella: A Treasure Trove of Structurally Unique and Biologically Active Sterols. Mar Drugs 2023; 21:md21050291. [PMID: 37233485 DOI: 10.3390/md21050291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/05/2023] [Accepted: 05/06/2023] [Indexed: 05/27/2023] Open
Abstract
The marine environment is considered a vast source in the discovery of structurally unique bioactive secondary metabolites. Among marine invertebrates, the sponge Theonella spp. represents an arsenal of novel compounds ranging from peptides, alkaloids, terpenes, macrolides, and sterols. In this review, we summarize the recent reports on sterols isolated from this amazing sponge, describing their structural features and peculiar biological activities. We also discuss the total syntheses of solomonsterols A and B and the medicinal chemistry modifications on theonellasterol and conicasterol, focusing on the effect of chemical transformations on the biological activity of this class of metabolites. The promising compounds identified from Theonella spp. possess pronounced biological activity on nuclear receptors or cytotoxicity and result in promising candidates for extended preclinical evaluations. The identification of naturally occurring and semisynthetic marine bioactive sterols reaffirms the utility of examining natural product libraries for the discovery of new therapeutical approach to human diseases.
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Affiliation(s)
- Carmen Festa
- Department of Pharmacy, University of Naples, Via Domenico Montesano, 49, 80131 Naples, Italy
| | - Simona De Marino
- Department of Pharmacy, University of Naples, Via Domenico Montesano, 49, 80131 Naples, Italy
| | - Angela Zampella
- Department of Pharmacy, University of Naples, Via Domenico Montesano, 49, 80131 Naples, Italy
| | - Stefano Fiorucci
- Department of Medicine and Surgery, University of Perugia, Piazza L. Severi, 1, 06132 Perugia, Italy
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Anti-Proliferative Potential of Secondary Metabolites from the Marine Sponge Theonella sp.: Moving from Correlation toward Causation. Metabolites 2021; 11:metabo11080532. [PMID: 34436473 PMCID: PMC8400523 DOI: 10.3390/metabo11080532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/02/2021] [Accepted: 08/03/2021] [Indexed: 11/19/2022] Open
Abstract
Marine sponges have been recognized as a rich source of potential anti-proliferative metabolites. Currently, there are two sponge-derived anti-cancer agents (a macrolide and a nucleoside) isolated from the Porifera phylum, suggesting the great potential of this sponge as a rich source for anti-neoplastic agents. To search for more bioactive metabolites from this phylum, we examined the EtOAc extract of Theonella sp. sponge. We isolated seven compounds (1–7), including four 4-methylene sterols (1–4), two nucleosides (5 and 6), and one macrolide (7). Among them, theonellasterol L (1) was identified for the first time, while 5′-O-acetyl-2′-deoxyuridine (5) and 5′-O-acetylthymidine (6) were the first identified deoxyuridine and thymidine derivatives from the sponge Theonella sp. These structures were elucidated based on their spectroscopic data. The anti-proliferation activity of compounds 1–7 against the MCF-7, MDA-MB-231, T-47D, HCT-116, DLD-1, K562, and Molt 4 cancer cell lines was determined. The results indicated that the 14-/15-oxygenated moiety played an important role in the antiproliferative activity and the macrolide derivatives dominated the anti-proliferative effect of the sponge Theonella sp. The in silico analysis, using a chemical global positioning system for natural products (ChemGPS-NP), indicated an anti-proliferative mode of actions (MOA) suggesting the potential applications of the isolated active metabolites as anti-proliferative agents.
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Shin AY, Lee HS, Lee YJ, Lee JS, Son A, Choi C, Lee J. Oxygenated Theonellastrols: Interpretation of Unusual Chemical Behaviors Using Quantum Mechanical Calculations and Stereochemical Reassignment of 7 α-Hydroxytheonellasterol. Mar Drugs 2020; 18:md18120607. [PMID: 33265994 PMCID: PMC7760259 DOI: 10.3390/md18120607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 01/02/2023] Open
Abstract
A total of eight new oxygenated 4-exo-methylene sterols, 1–8, together with one artifact 9 and six known sterols 11–16, were isolated from the marine sponge Theonella swinhoei collected from the Bohol province in Philippines. Structures of sterols 1–8 were determined from 1D and 2D NMR data. Among the sterols, 8α-hydroxytheonellasterol (4) spontaneously underwent an allylic 1,3-hydroxyl shift to produce 15α-hydroxytheonellasterol (9) as an artifact; this was rationalized by quantum mechanical calculations of the transition state. In addition, the 1,2-epoxy alcohol subunit of 8α-hydroxy-14,15-β-epoxytheonellasterol (5) was assigned using the Gauge-Independent Atomic Orbital (GIAO) NMR chemical shift calculations and subsequent DP4+ analysis. Finally, comparison of the 13C chemical shifts of isolated 7α-hydroxytheonellasterol (6) with the reported values revealed significant discrepancies at C-6, C-7, C-8, and C-14, leading to reassignment of the C-7 stereochemistry in the known structure.
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Affiliation(s)
- A-Young Shin
- Korea Institute of Ocean Science & Technology (KIOST), Busan 49111, Korea; (A-Y.S.); (H.-S.L.); (Y.-J.L.); (J.S.L.)
- Department of Marine Biotechnology, University of Science & Technology, Daejeon 34113, Korea
| | - Hyi-Seung Lee
- Korea Institute of Ocean Science & Technology (KIOST), Busan 49111, Korea; (A-Y.S.); (H.-S.L.); (Y.-J.L.); (J.S.L.)
- Department of Marine Biotechnology, University of Science & Technology, Daejeon 34113, Korea
| | - Yeon-Ju Lee
- Korea Institute of Ocean Science & Technology (KIOST), Busan 49111, Korea; (A-Y.S.); (H.-S.L.); (Y.-J.L.); (J.S.L.)
- Department of Marine Biotechnology, University of Science & Technology, Daejeon 34113, Korea
| | - Jong Seok Lee
- Korea Institute of Ocean Science & Technology (KIOST), Busan 49111, Korea; (A-Y.S.); (H.-S.L.); (Y.-J.L.); (J.S.L.)
- Department of Marine Biotechnology, University of Science & Technology, Daejeon 34113, Korea
| | - Arang Son
- Department of Radiation Oncology, Samsung Medical Center, Seoul 06351, Korea; (A.S.); (C.C.)
| | - Changhoon Choi
- Department of Radiation Oncology, Samsung Medical Center, Seoul 06351, Korea; (A.S.); (C.C.)
| | - Jihoon Lee
- Korea Institute of Ocean Science & Technology (KIOST), Busan 49111, Korea; (A-Y.S.); (H.-S.L.); (Y.-J.L.); (J.S.L.)
- Department of Marine Biotechnology, University of Science & Technology, Daejeon 34113, Korea
- Correspondence: ; Tel.: +82-51-664-3343
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Abstract
A series of 4-methylidene sterols including three new compounds 1-3, were isolated from the marine sponge Theonella swinhoei. The structures of new compounds were determined on the basis of spectroscopic analyses. Compounds 3, 5, and 6 showed cytotoxicities against U937, MCF-7, and PC-9 cancer cells with IC50 in the range of 1.6-8.8 μM. The new compound 3 exhibited remarkable proapoptotic activity in breast cancer cells. Mechanically, 3 significantly triggered reactive oxygen species (ROS) accumulation resulting in apoptosis and DNA damage in breast cancer cells.
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Affiliation(s)
- Fan Yang
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yan-Yun Li
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Jie Tang
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Fan Sun
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Hou-Wen Lin
- Research Center for Marine Drugs, State Key Laboratory of Oncogenes and Related Genes, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.
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Guo JK, Chiang CY, Lu MC, Chang WB, Su JH. 4-Methylenesterols from a sponge Theonella swinhoei. Mar Drugs 2012; 10:1536-1544. [PMID: 22851924 PMCID: PMC3407929 DOI: 10.3390/md10071536] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 06/28/2012] [Accepted: 07/11/2012] [Indexed: 11/16/2022] Open
Abstract
Three new 4-methylenesterols, theonellasterol K (1), acetyltheonellasterol (2) and acetyldehydroconicasterol (3), along with two known sterols, theonellasterol (4) and theonellasterone (5), were isolated from the sponge Theonella swinhoei. The structures of these compounds were elucidated on the basis of their spectroscopic data and comparison of the NMR data with those of known analogues. Compound 1 exhibited significant cytotoxic activity against HCT-116, K562 and Molt 4 cancer cell lines.
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Affiliation(s)
- Jheng-Kun Guo
- National Museum of Marine Biology & Aquarium, Pingtung 944, Taiwan; (J.-K.G.); (M.-C.L.)
- Graduate Institute of Marine Biodiversity and Evolutionary Biology, National Dong Hwa University, Pingtung 944, Taiwan
| | - Ching-Ying Chiang
- Center of General Studies, National Kaohsiung Marine University, Kaohsiung 811, Taiwan;
| | - Mei-Chin Lu
- National Museum of Marine Biology & Aquarium, Pingtung 944, Taiwan; (J.-K.G.); (M.-C.L.)
- Graduate Institute of Marine Biotechnology, National Dong Hwa University, Pingtung 944, Taiwan
| | - Wen-Been Chang
- National Museum of Marine Biology & Aquarium, Pingtung 944, Taiwan; (J.-K.G.); (M.-C.L.)
- Graduate Institute of Marine Biodiversity and Evolutionary Biology, National Dong Hwa University, Pingtung 944, Taiwan
- Authors to whom correspondence should be addressed; (W.-B.C.); (J.-H.S.); Tel.: +886-8-8825001 (ext. 3126); Fax: +886-8-8825087
| | - Jui-Hsin Su
- National Museum of Marine Biology & Aquarium, Pingtung 944, Taiwan; (J.-K.G.); (M.-C.L.)
- Graduate Institute of Marine Biotechnology, National Dong Hwa University, Pingtung 944, Taiwan
- Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung 804, Taiwan
- Authors to whom correspondence should be addressed; (W.-B.C.); (J.-H.S.); Tel.: +886-8-8825001 (ext. 3126); Fax: +886-8-8825087
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Winder PL, Pomponi SA, Wright AE. Natural products from the Lithistida: a review of the literature since 2000. Mar Drugs 2011; 9:2643-2682. [PMID: 22363244 PMCID: PMC3280575 DOI: 10.3390/md9122643] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 11/09/2011] [Accepted: 12/06/2011] [Indexed: 12/20/2022] Open
Abstract
Lithistid sponges are known to produce a diverse array of compounds ranging from polyketides, cyclic and linear peptides, alkaloids, pigments, lipids, and sterols. A majority of these structurally complex compounds have very potent and interesting biological activities. It has been a decade since a thorough review has been published that summarizes the literature on the natural products reported from this amazing sponge order. This review provides an update on the current taxonomic classification of the Lithistida, describes structures and biological activities of 131 new natural products, and discusses highlights from the total syntheses of 16 compounds from marine sponges of the Order Lithistida providing a compilation of the literature since the last review published in 2002.
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Affiliation(s)
- Priscilla L Winder
- Harbor Branch Oceanographic Institution at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA
| | - Shirley A Pomponi
- Harbor Branch Oceanographic Institution at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA
| | - Amy E Wright
- Harbor Branch Oceanographic Institution at Florida Atlantic University, Center for Marine Biomedical and Biotechnology Research, 5600 US 1 North, Fort Pierce, FL 34946, USA
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De Marino S, Sepe V, D'Auria MV, Bifulco G, Renga B, Petek S, Fiorucci S, Zampella A. Towards new ligands of nuclear receptors. Discovery of malaitasterol A, an unique bis-secosterol from marine sponge Theonella swinhoei. Org Biomol Chem 2011; 9:4856-62. [PMID: 21584311 DOI: 10.1039/c1ob05378g] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Malaitasterol A, an unprecedented bis-secosterol, was isolated from a Solomon collection of Theonella swinhoei. The structure was elucidated on the basis of a combination of comprehensive 1D and 2D NMR analysis, high-resolution mass spectrometry and DFT (13)C chemical shift calculations. The biological characterization of malaitasterol A provided evidence that this compound is a potent agonist of pregnane-X-receptor and its putative binding mode to PXR has been obtained through docking calculations.
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Affiliation(s)
- Simona De Marino
- Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli Federico II, via D. Montesano 49, 80131 Napoli, Italy
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8
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De Marino S, Ummarino R, D’Auria MV, Chini MG, Bifulco G, Renga B, D’Amore C, Fiorucci S, Debitus C, Zampella A. Theonellasterols and Conicasterols from Theonella swinhoei. Novel Marine Natural Ligands for Human Nuclear Receptors. J Med Chem 2011; 54:3065-75. [DOI: 10.1021/jm200169t] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Simona De Marino
- Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli “Federico II”, via D. Montesano 49, 80131 Napoli, Italy
| | - Raffaella Ummarino
- Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli “Federico II”, via D. Montesano 49, 80131 Napoli, Italy
| | - Maria Valeria D’Auria
- Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli “Federico II”, via D. Montesano 49, 80131 Napoli, Italy
| | - Maria Giovanna Chini
- Dipartimento di Scienze Farmaceutiche, Università di Salerno, via Ponte don Melillo, 84084 Fisciano (SA), Italy
| | - Giuseppe Bifulco
- Dipartimento di Scienze Farmaceutiche, Università di Salerno, via Ponte don Melillo, 84084 Fisciano (SA), Italy
| | - Barbara Renga
- Dipartimento di Medicina Clinica e Sperimentale, Università di Perugia, Nuova Facoltà di Medicina e Chirurgia, Via Gerardo Dottori 1, S. Andrea delle Fratte, 06132 Perugia, Italy
| | - Claudio D’Amore
- Dipartimento di Medicina Clinica e Sperimentale, Università di Perugia, Nuova Facoltà di Medicina e Chirurgia, Via Gerardo Dottori 1, S. Andrea delle Fratte, 06132 Perugia, Italy
| | - Stefano Fiorucci
- Dipartimento di Medicina Clinica e Sperimentale, Università di Perugia, Nuova Facoltà di Medicina e Chirurgia, Via Gerardo Dottori 1, S. Andrea delle Fratte, 06132 Perugia, Italy
| | - Cécile Debitus
- Institut de Recherche pour le Développement (IRD), Polynesian Research Center on Island Biodiversity, BP529, 98713 Papeete, Tahiti, French Polynesia
| | - Angela Zampella
- Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli “Federico II”, via D. Montesano 49, 80131 Napoli, Italy
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Zhang HJ, Yi YH, Lin HW. Oxygenated 4-Methylidene Sterols from the South China Sea Sponge Theonella swinhoei. Helv Chim Acta 2010. [DOI: 10.1002/hlca.200900312] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Angawi RF, Calcinai B, Cerrano C, Dien HA, Fattorusso E, Scala F, Taglialatela-Scafati O. Dehydroconicasterol and aurantoic acid, a chlorinated polyene derivative, from the Indonesian sponge Theonella swinhoei. JOURNAL OF NATURAL PRODUCTS 2009; 72:2195-2198. [PMID: 19961178 DOI: 10.1021/np900669d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The chlorinated polyene aurantoic acid (1) and the 4-methylene sterol dehydroconicasterol (2) were isolated from the Indonesian sponge Theonella swinhoei, and their structures were elucidated by interpretation of spectroscopic data. Aurantoic acid is a unique member in the class of naturally occurring conjugated polyene derivatives, while dehydroconicasterol is the likely biogenetic precursor of the major Theonella 4-methylene sterols.
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Affiliation(s)
- Rihab F Angawi
- Dipartimento di Chimica delle Sostanze Naturali, Universita di Napoli Federico II, Via D. Montesano 49, 80131 Napoli, Italy
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Gross H, Reitner J, König GM. Isolation and structure elucidation of azoricasterol, a new sterol of the deepwater sponge Macandrewia azorica. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2004; 91:441-6. [PMID: 15340692 DOI: 10.1007/s00114-004-0552-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2004] [Accepted: 07/22/2004] [Indexed: 10/26/2022]
Abstract
Chemical investigation of the deepwater sponge Macandrewia azorica, collected from the flanks of the Gettysburg and Ormonde Sea Mount, North Atlantic, from a depth of 600 m, has led to the isolation of a new sterol with an unusual side chain (1), along with S-methylergothioneine (2). The structures of compounds 1 and 2 were established by employing spectroscopic techniques (NMR, MS, UV, IR and polarimetry). This is the first report of metabolites of a sponge belonging to the genus Macandrewia.
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Affiliation(s)
- Harald Gross
- Pharmazeutische Biologie, Universität Bonn, Nussallee 6, 53115 Bonn, Germany
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Nevalainen TJ, Quinn RJ, Hooper JNA. Phospholipase A2 in porifera. Comp Biochem Physiol B Biochem Mol Biol 2004; 137:413-20. [PMID: 15050528 DOI: 10.1016/j.cbpc.2004.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2003] [Revised: 12/15/2003] [Accepted: 01/31/2004] [Indexed: 11/27/2022]
Abstract
Phospholipase A2 (PLA2) catalytic activity was measured in aqueous extracts of 83 freeze-dried specimens representing 55 marine sponge species collected from the east coast of Australia including the Great Barrier Reef. High levels (>500 u/l) of PLA2 activity (defined as the amount of activity that releases 1 micromol of fatty acid per min) were found in four out of 55 species (7%), moderate activities (100-499 u/l) in 6/55 (11%), low activities (1-99 u/l) in 11/55 (20%) and no PLA2 activity in 34/55 (62%). Species with high PLA2 activity levels included Cymbastela coralliophila (2118 u/l, specific activity 10,590 u/g of protein), Acanthella cavernosa (1318 u/l, specific activity 2470 u/g), Spirastrella vagabunda (1036 u/l, specific activity 1727 u/g and Theonella swinhoei (567 u/l, specific activity 354 u/g). It was postulated that poriferan PLA2 may be involved in eicosanoid metabolism and antimicrobial and toxic defence of the animal.
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Abstract
During 2000, marine antitumor pharmacology research aimed at the discovery of novel antitumor agents was published in 85 peer-reviewed articles. The purpose of this article is to present a structured review of the antitumor and cytotoxic properties of 143 marine natural products, many of them novel compounds that belong to diverse structural classes, including polyketides, terpenes, steroids and peptides. The organisms yielding these bioactive compounds comprised a taxonomically diverse group of marine invertebrate animals, algae, fungi and bacteria. Antitumor pharmacological studies were conducted with 19 marine natural products in a number of experimental and clinical models that defined or further characterized their mechanisms of action. Potentially promising in vitro cytotoxicity data generated with murine and human tumor cell lines were reported for 124 novel marine chemicals with as yet undetermined mechanisms of action. Noteworthy is the fact that marine anticancer research clearly remains a multinational effort, involving researchers from Austria, Australia, Brazil, Canada, England, France, Germany, Greece, Indonesia, Italy, Japan, New Zealand, Russia, Spain, South Korea, Switzerland, Taiwan, the Netherlands and the United States. Finally, this 2000 overview of the marine pharmacology literature highlights the fact that the discovery of novel marine antitumor agents continued at the same high level of research activity as during 1998 and 1999.
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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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Hu JF, Kelly M, Hamann MT. 26-Nor-25-isopropyl-ergosta-5,7,22E-trien-3beta-ol: a new C(29) sterol from the sponge Agelas sceptrum from Jamaica. Steroids 2002; 67:743-7. [PMID: 12123785 DOI: 10.1016/s0039-128x(02)00033-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In addition to several known sterols, a new C(29) marine sterol with a normal ergosterol nucleus but a modified side chain, named 26-nor-25-isopropyl-ergosta-5,7,22E-trien-3beta-ol, was isolated from the Jamaican sponge Agelas sceptrum. The structures were assigned by spectroscopic methods including high-resolution 2D NMR techniques.
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Affiliation(s)
- Jin-Feng Hu
- Department of Pharmacognosy and National Center for the Development of Natural Products, School of Pharmacy, The University of Mississippi, P.O. Box 1848, University, MS 38677, USA
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Phuwapraisirisan P, Matsunaga S, van Soest RWM, Fusetani N. Isolation of a new mycalolide from the marine sponge Mycale izuensis. JOURNAL OF NATURAL PRODUCTS 2002; 65:942-943. [PMID: 12088446 DOI: 10.1021/np010663+] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Bioassay-directed fractionation of the lipophilic extract of the marine sponge Mycale izuensis led to the isolation of cytotoxic mycalolides including a new compound, 30,32-dihydroxymycalolide A (1). Its structure including absolute stereochemistry was deduced by spectroscopic and chemical methods. Compound 1 was cytotoxic against HeLa cells with an IC(50) value of 2.6 ng/mL.
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Affiliation(s)
- Preecha Phuwapraisirisan
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
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Elyashberg ME, Blinov KA, Williams AJ, Martirosian ER, Molodtsov SG. Application of a new expert system for the structure elucidation of natural products from their 1D and 2D NMR data. JOURNAL OF NATURAL PRODUCTS 2002; 65:693-703. [PMID: 12027744 DOI: 10.1021/np0103315] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Described herein are applications of the latest version of the StrucEluc expert software system, enhanced to use 2D NMR data, to the structure elucidation of 60 recently isolated natural products. In this study, selected molecules containing between 15 and 65 skeletal atoms and having molecular masses ranging from 200 to 900 amu have been investigated. The correct structure was determined unambiguously for 58 of these molecules. The structures for 75% of the data sets were determined in less than one minute, while 90% of the analyses required no more than 30 minutes. The strategy of structure elucidation by this expert system is described, and several examples are discussed. These illustrate that StrucEluc is a powerful and versatile analytical tool for the structure elucidation of natural products.
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Affiliation(s)
- Mikhail E Elyashberg
- Advanced Chemistry Development Inc., 90 Adelaide Street West, Suite 702, Toronto, Ontario, M5H 3V9 Canada
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