1
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Xia ZY, Sun MM, Jin Y, Yao LG, Su MZ, Liang LF, Wang H, Guo YW. Lobosteroids A-F: Six New Highly Oxidized Steroids from the Chinese Soft Coral Lobophytum sp. Mar Drugs 2023; 21:457. [PMID: 37623738 PMCID: PMC10456462 DOI: 10.3390/md21080457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 08/26/2023] Open
Abstract
To explore the steroidal constituents of the soft coral Lobophytum sp. at the coast of Xuwen County, Guangdong Province, China, a chemical investigation of the above-mentioned soft coral was carried out. After repeated column chromatography over silica gel, Sephadex LH-20, and reversed-phase HPLC, six new steroids, namely lobosteroids A-F (1-6), along with four known compounds 7-10, were obtained. Their structures were determined by extensive spectroscopic analysis and comparison with the spectral data reported in the literature. Among them, the absolute configuration of 1 was determined by X-ray diffraction analysis using Cu Kα radiation. These steroids were characterized by either the presence of an α,β-α',β'-unsaturated carbonyl, or an α,β-unsaturated carbonyl moiety in ring A, or the existence of a 5α,8α-epidioxy system in ring B, as well as diverse oxidation of side chains. The antibacterial bioassays showed that all isolated steroids exhibited significant inhibitory activities against the fish pathogenic bacteria Streptococcus parauberis FP KSP28, Phoyobacterium damselae FP2244, and Streptococcus parauberis SPOF3K, with IC90 values ranging from 0.1 to 11.0 µM. Meanwhile, compounds 2 and 6-10 displayed potent inhibitory effects against the vancomycin-resistant Enterococcus faecium bacterium G7 with IC90 values ranging from 4.4 to 18.3 µM. Therefore, ten highly oxidized steroids with strong antibacterial activities were isolated from the Chinese soft coral Lobophytum sp., which could be developed as new chemotypes of antibacterial drug leads.
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Affiliation(s)
- Zi-Yi Xia
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals and College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China;
| | - Man-Man Sun
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 198 Binhai East Road, High-Tech Zone, Yantai 264117, China; (M.-M.S.); (Y.J.); (L.-G.Y.); (M.-Z.S.)
| | - Yang Jin
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 198 Binhai East Road, High-Tech Zone, Yantai 264117, China; (M.-M.S.); (Y.J.); (L.-G.Y.); (M.-Z.S.)
| | - Li-Gong Yao
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 198 Binhai East Road, High-Tech Zone, Yantai 264117, China; (M.-M.S.); (Y.J.); (L.-G.Y.); (M.-Z.S.)
| | - Ming-Zhi Su
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 198 Binhai East Road, High-Tech Zone, Yantai 264117, China; (M.-M.S.); (Y.J.); (L.-G.Y.); (M.-Z.S.)
| | - Lin-Fu Liang
- College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China
| | - Hong Wang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals and College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China;
| | - Yue-Wei Guo
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals and College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China;
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 198 Binhai East Road, High-Tech Zone, Yantai 264117, China; (M.-M.S.); (Y.J.); (L.-G.Y.); (M.-Z.S.)
- School of Medicine, Shanghai University, 99 Shangda Road, Bao Shan District, Shanghai 200444, China
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2
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Dembitsky VM. Bioactive Steroids Bearing Oxirane Ring. Biomedicines 2023; 11:2237. [PMID: 37626733 PMCID: PMC10452232 DOI: 10.3390/biomedicines11082237] [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: 07/18/2023] [Revised: 07/24/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
This review explores the biological activity and structural diversity of steroids and related isoprenoid lipids, with a particular focus on compounds containing an oxirane ring. These natural compounds are derived from fungi, fungal endophytes, as well as extracts of plants, algae, and marine invertebrates. To evaluate their biological activity, an extensive examination of refereed literature sources was conducted, including in vivo and in vitro studies and the utilization of the QSAR method. Notable properties observed among these compounds include strong anti-inflammatory, antineoplastic, antiproliferative, anti-hypercholesterolemic, antiparkinsonian, diuretic, anti-eczematic, anti-psoriatic, and various other activities. Throughout this review, 3D graphs illustrating the activity of individual steroids are presented, accompanied by images of selected terrestrial or marine organisms. Furthermore, this review provides explanations for specific types of biological activity associated with these compounds. The data presented in this review are of scientific interest to the academic community and carry practical implications in the fields of pharmacology and medicine. By analyzing the biological activity and structural diversity of steroids and related isoprenoid lipids, this review offers valuable insights that contribute to both theoretical understanding and applied research. This review draws upon data from various authors to compile information on the biological activity of natural steroids containing an oxirane ring.
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Affiliation(s)
- Valery M Dembitsky
- Centre for Applied Research, Innovation and Entrepreneurship, Lethbridge College, 3000 College Drive South, Lethbridge, AB T1K 1L6, Canada
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3
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The Chemotherapeutic Potentials of Compounds Isolated from the Plant, Marine, Fungus, and Microorganism: Their Mechanism of Action and Prospects. J Trop Med 2022; 2022:5919453. [PMID: 36263439 PMCID: PMC9576449 DOI: 10.1155/2022/5919453] [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: 03/28/2022] [Accepted: 09/10/2022] [Indexed: 12/02/2022] Open
Abstract
Research on natural products mainly focuses on developing a suitable drug to treat human disease. There has been a sharp increase in the development of drugs from natural products. Most of the drugs that are available are from the terrestrial origin. Marine natural products are less explored. Oceans are considered as a vast ecosystem with a wide variety of living organisms and natural products that are unexplored. Large numbers of antitumor drugs are from natural sources such as plants, marine, and microorganisms. 80% new chemical entities that were launched over the past 60 decades were from a natural source. In this article, the anticancer potential from the natural source such as plants, fungi, microorganisms, marine, and endophytes has been reviewed. Emphasis is given on the compound from the marine, plant, and of bacterial origin. Finally, we consider the future and how we might achieve better sustainability to alleviate human cancer suffering while having fewer side effects, more efficacies, and causing less harm than the present treatments.
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4
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Chemical Review of Gorgostane-Type Steroids Isolated from Marine Organisms and Their 13C-NMR Spectroscopic Data Characteristics. Mar Drugs 2022; 20:md20020139. [PMID: 35200668 PMCID: PMC8878145 DOI: 10.3390/md20020139] [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: 01/15/2022] [Revised: 02/10/2022] [Accepted: 02/11/2022] [Indexed: 02/05/2023] Open
Abstract
Gorgostane steroids are isolated from marine organisms and consist of 30 carbon atoms with a characteristic cyclopropane moiety. From the pioneering results to the end of 2021, isolation, biosynthesis, and structural elucidation using 13C-NMR will be used. Overall, 75 compounds are categorized into five major groups: gorgost-5-ene, 5,6-epoxygorgostane, 5,6-dihydroxygorgostane, 9,11-secogorgostane, and 23-demethylgorgostane, in addition to miscellaneous gorgostane. The structural diversity, selectivity for marine organisms, and biological effects of gorgostane steroids have generated considerable interest in the field of drug discovery research.
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5
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Rosenbaum N, Schmidt L, Mohr F, Fuhr O, Nieger M, Bräse S. Formal Semisynthesis of Demethylgorgosterol Utilizing a Stereoselective Intermolecular Cyclopropanation Reaction. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nicolai Rosenbaum
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Lisa Schmidt
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
| | - Florian Mohr
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- New address: Pharmazeutisches Institut Eberhard-Karls-Universität Tübingen Auf der Morgenstelle 8 72076 Tübingen
| | - Olaf Fuhr
- Institute for Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen
| | - Martin Nieger
- Department of Chemistry University of Helsinki P. O. Box 55 00014 Helsinki Finland
| | - Stefan Bräse
- Institute of Organic Chemistry (IOC) Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Institute of Biological and Chemical Systems – Functional Molecular Systems (IBCS-FMS) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen
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6
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Hanif N, Murni A, Tanaka C, Tanaka J. Marine Natural Products from Indonesian Waters. Mar Drugs 2019; 17:md17060364. [PMID: 31248122 PMCID: PMC6627775 DOI: 10.3390/md17060364] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 12/13/2022] Open
Abstract
Natural products are primal and have been a driver in the evolution of organic chemistry and ultimately in science. The chemical structures obtained from marine organisms are diverse, reflecting biodiversity of genes, species and ecosystems. Biodiversity is an extraordinary feature of life and provides benefits to humanity while promoting the importance of environment conservation. This review covers the literature on marine natural products (MNPs) discovered in Indonesian waters published from January 1970 to December 2017, and includes 732 original MNPs, 4 structures isolated for the first time but known to be synthetic entities, 34 structural revisions, 9 artifacts, and 4 proposed MNPs. Indonesian MNPs were found in 270 papers from 94 species, 106 genera, 64 families, 32 orders, 14 classes, 10 phyla, and 5 kingdoms. The emphasis is placed on the structures of organic molecules (original and revised), relevant biological activities, structure elucidation, chemical ecology aspects, biosynthesis, and bioorganic studies. Through the synthesis of past and future data, huge and partly undescribed biodiversity of marine tropical invertebrates and their importance for crucial societal benefits should greatly be appreciated.
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Affiliation(s)
- Novriyandi Hanif
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, IPB University (Bogor Agricultural University), Bogor 16680, Indonesia.
| | - Anggia Murni
- Tropical Biopharmaca Research Center, IPB University (Bogor Agricultural University), Bogor 16128, Indonesia.
| | - Chiaki Tanaka
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
| | - Junichi Tanaka
- Department of Chemistry, Biology, and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan.
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7
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Dembitsky VM, Gloriozova TA, Poroikov VV. Naturally occurring marine α,β-epoxy steroids: Origin and biological activities. VIETNAM JOURNAL OF CHEMISTRY 2018. [DOI: 10.1002/vjch.201800025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Abstract
Three new polyoxygenated steroids, michosterols A–C (1–3), and four known compounds (4–7) were isolated from the ethyl acetate (EtOAc) extract of the soft coral Lobophytum michaelae, collected off the coast of Taitung. The structures of the new compounds were elucidated on the basis of spectroscopic analyses and comparison of the nuclear magnetic resonance (NMR) data with related steroids. The cytotoxicity of compounds 1–3 against the proliferation of a limited panel of cancer cell lines was assayed. Compound 1 was found to display moderate cytotoxicity against adenocarcinomic human alveolar basal epithelial (A549) cancer cells. It also exhibited potent anti-inflammatory activity by suppressing superoxide anion generation and elastase release in N-formyl-methionyl-leucyl-phenylalanine/cytochalasin B (fMLP/CB)-stimulated human neutrophils. Furthermore, 3 could effectively inhibit elastase release, as well.
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9
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Anti-Inflammatory Dembranoids from the Soft Coral Lobophytum crassum. Mar Drugs 2017; 15:md15100327. [PMID: 29065512 PMCID: PMC5666433 DOI: 10.3390/md15100327] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 10/19/2017] [Accepted: 10/20/2017] [Indexed: 11/17/2022] Open
Abstract
Cembrane-type diterpenoids are among the most frequently encountered natural products from the soft corals of the genus Lobophytum. In the course of our investigation to identify anti-inflammatory constituents from a wild-type soft coral Lobophytum crassum, two new cembranoids, lobophyolide A (1) and B (2), along with five known compounds (3–7), were isolated. The structures of these natural products were identified using NMR and MS spectroscopic analyses. Compound 1 was found to possess the first identified α-epoxylactone group among all cembrane-type diterpenoids. The in vitro anti-inflammatory effect of compounds 1–5 was evaluated. The results showed that compounds 1–5 not only reduced IL-12 release, but also attenuated NO production in LPS-activated dendritic cells. Our data indicated that the isolated series of cembrane-type diterpenoids demonstrated interesting structural features and anti-inflammatory activity which could be further developed into therapeutic entities.
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10
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Anti-Inflammatory Lobane and Prenyleudesmane Diterpenoids from the Soft Coral Lobophytum varium. Mar Drugs 2017; 15:md15100300. [PMID: 28961211 PMCID: PMC5666408 DOI: 10.3390/md15100300] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 09/22/2017] [Accepted: 09/27/2017] [Indexed: 11/19/2022] Open
Abstract
New lobane-based diterpenoids lobovarols A–D (1–4) and a prenyleudesmane-type diterpenoid lobovarol E (5) along with seven known related diterpenoids (6–12) were isolated from the ethyl acetate extract of a Taiwanese soft coral Lobophytum varium. Their structures were identified on the basis of multiple spectroscopic analyses and spectral comparison. The absolute configuration at C-16 of the known compound 11 is reported herein for the first time. The anti-inflammatory activities of compounds 1–12 were assessed by measuring their inhibitory effect on N-formyl-methionyl-leucyl-phenyl-alanine/cytochalasin B (fMLP/CB)-induced superoxide anion generation and elastase release in human neutrophils. Metabolites 2, 5, and 11 were found to show moderate inhibitory activity on the generation of superoxide anion, while compounds 5, 8, 11, and 12 could effectively suppress elastase release in fMLP/CB-stimulated human neutrophil cells at 10 μM. All of the isolated diterpenoids did not exhibit cytotoxic activity (IC50 > 50 μM) towards a limited panel of cancer cell lines.
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11
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Bogdanov A, Hertzer C, Kehraus S, Nietzer S, Rohde S, Schupp PJ, Wägele H, König GM. Secondary metabolome and its defensive role in the aeolidoidean Phyllodesmium longicirrum, (Gastropoda, Heterobranchia, Nudibranchia). Beilstein J Org Chem 2017; 13:502-519. [PMID: 28405231 PMCID: PMC5372768 DOI: 10.3762/bjoc.13.50] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 02/08/2017] [Indexed: 11/23/2022] Open
Abstract
Phyllodesmium longicirrum is the largest aeolidoidean species known to date, and extremely rich in terpenoid chemistry. Herein we report the isolation of a total of 19 secondary metabolites from a single specimen of this species, i.e., steroids 1-4, cembranoid diterpenes 5-13, complex biscembranoids 14 and 15, and the chatancin-type diterpenes 16-19. These compounds resemble those from soft corals of the genus Sarcophyton, of which to date, however, only S. trocheliophorum is described as a food source for P. longicirrum. Fish feeding deterrent activity was determined using the tropical puffer fish Canthigaster solandri, and showed activity for (2S)-isosarcophytoxide (10), cembranoid bisepoxide 12 and 4-oxochatancin (16). Determining the metabolome of P. longicirrum and its bioactivity, makes it evident that this seemingly vulnerable soft bodied animal is well protected from fish by its chemical arsenal.
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Affiliation(s)
- Alexander Bogdanov
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany
| | - Cora Hertzer
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany
| | - Stefan Kehraus
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany
| | - Samuel Nietzer
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzki University Oldenburg, Schleusenstraße 1, 26382 Wilhelmshaven, Germany
| | - Sven Rohde
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzki University Oldenburg, Schleusenstraße 1, 26382 Wilhelmshaven, Germany
| | - Peter J Schupp
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzki University Oldenburg, Schleusenstraße 1, 26382 Wilhelmshaven, Germany
| | - Heike Wägele
- Zoologisches Forschungsmuseum Alexander Koenig, Adenauerallee 160, 53113 Bonn, Germany
| | - Gabriele M König
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany
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12
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Klyflaccisteroids K-M, bioactive steroidal derivatives from a soft coral Klyxum flaccidum. Bioorg Med Chem Lett 2017; 27:1220-1224. [PMID: 28159416 DOI: 10.1016/j.bmcl.2017.01.060] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 01/12/2017] [Accepted: 01/19/2017] [Indexed: 11/21/2022]
Abstract
New steroids, klyflaccisteroids K-M (1-3), were isolated from a soft coral Klyxum flaccidum. Their structures were elucidated on the basis of extensive spectroscopic analysis. Klyflaccisteroid K (1) is the unique 9,11-secosteroid with a 5,8-epidioxy-9-ene functional group. Klyflaccisteroid L (2) has an unusual 11-norsteroid skeleton and is the first example of 11-oxasteroid isolated from natural sources. Cytotoxicity assay showed that 1 and 3 possessed moderate to weak cytotoxicity against these cancer cells. Compound 1 was also found to display significant anti-inflammatory activity of suppressing superoxide anion generation (O2-) and elastase release, and compound 3 was found to show notable anti-inflammatory activity toward inhibition of elasstase release, too.
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13
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Cimmino A, Mathieu V, Evidente M, Ferderin M, Moreno Y Banuls L, Masi M, De Carvalho A, Kiss R, Evidente A. Glanduliferins A and B, two new glucosylated steroids from Impatiens glandulifera, with in vitro growth inhibitory activity in human cancer cells. Fitoterapia 2016; 109:138-45. [DOI: 10.1016/j.fitote.2015.12.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 12/16/2015] [Accepted: 12/17/2015] [Indexed: 02/08/2023]
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14
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Chang YC, Kuo LM, Su JH, Hwang TL, Kuo YH, Lin CS, Wu YC, Sheu JH, Sung PJ. Pinnigorgiols A–C, 9,11-secosterols with a rare ring arrangement from a gorgonian coral Pinnigorgia sp. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.072] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Zhang J, Liu LL, Zhong BL, Liao XJ, Xu SH. 9,11-Secosteroids with cytotoxic activity from the South China Sea gorgonian coral Subergorgia suberosa. Steroids 2015; 98:100-6. [PMID: 25796549 DOI: 10.1016/j.steroids.2015.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 01/24/2015] [Accepted: 03/10/2015] [Indexed: 11/18/2022]
Abstract
Nine new 9,11-secosterols (1-9), containing the same 3β,6α,11-trihydroxy-9,11-seco-5α-cholest-7-en-9-one steroidal nucleus, whereas possessing an array of structurally diverse side chains, along with fourteen known 9,11-secosterol compounds (10-23), were isolated from the South China Sea gorgonian coral Subergorgia suberosa, of which 3/4, 5/6, 7/8, and the known compounds 11/12, 20/21 were five pairs of inseparable C-24 epimers. Their structures were established by the extensive analyses of 1D and 2D NMR spectra, high-resolution chemical ionization mass spectrometry (HRCIMS), and by the comparison with literature data. Cytotoxic effect of these metabolites against the growth of HeLa cell lines was evaluated. The result showed that the inhibitory effect of compounds 1-23 varied considerably depending on the nature of the side chain in spite of sharing the same steroidal nucleus. Compound 19, featuring both the absence of hydroxyl group and the presence of double bond in the stigmasterol side chain, exhibited the most potent cytotoxicity with IC50 being 15.1 μM. The preliminary structure activity relationship studies identified some important structural features considerably influencing the biological effect deserved, providing valuable information for chemists and pharmacologists to design and synthesize more effective antitumor agents bearing the 9,11-secosteroid framework.
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Affiliation(s)
- Jun Zhang
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; National Engineering Research Centre of Navel Orange, Gannan Normal University, Ganzhou 341000, PR China
| | - Ling-Li Liu
- Division of Life Science, School of Science, The Hong Kong University of Science and Technology, Hong Kong Special Administrative Region
| | - Ba-Lian Zhong
- National Engineering Research Centre of Navel Orange, Gannan Normal University, Ganzhou 341000, PR China
| | - Xiao-Jian Liao
- Department of Chemistry, Jinan University, Guangzhou 510632, PR China
| | - Shi-Hai Xu
- College of Pharmacy, Jinan University, Guangzhou 510632, PR China; Department of Chemistry, Jinan University, Guangzhou 510632, PR China.
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16
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Yang I, Choi H, Nam SJ, Kang H. A new 9,11-secosterol with a 1,4-quinone from a Korean marine sponge Ircinia sp. Arch Pharm Res 2015; 38:1970-4. [DOI: 10.1007/s12272-015-0620-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 05/26/2015] [Indexed: 11/29/2022]
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17
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Ibrahim-Ouali M, Hamze K. A click chemistry approach to secosteroidal macrocycles. Steroids 2014; 80:102-10. [PMID: 24361500 DOI: 10.1016/j.steroids.2013.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/25/2013] [Accepted: 12/09/2013] [Indexed: 10/25/2022]
Abstract
A new synthetic pathway towards secosteroidal macrocycles was described via a reaction of cycloaddition as the key step. The characteristic (1)H and (13)C NMR spectroscopic features of the synthesized compounds are reported.
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Affiliation(s)
- Malika Ibrahim-Ouali
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397 Marseille, France.
| | - Khalil Hamze
- Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397 Marseille, France
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18
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Tseng YJ, Wang SK, Duh CY. Secosteroids and norcembranoids from the soft coral Sinularia nanolobata. Mar Drugs 2013; 11:3288-96. [PMID: 23985899 PMCID: PMC3801121 DOI: 10.3390/md11093288] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 08/15/2013] [Accepted: 08/21/2013] [Indexed: 11/16/2022] Open
Abstract
Two new 9,11-secosteroids, 22α-acetoxy-24-methylene-3β,6α,11-trihydroxy-9,11-seco-cholest-7-en-9-one (1) and 11-acetoxy-24-methylene-1β,3β,6α-trihydroxy-9,11-seco-cholest-7-en-9-one (2), as well as two known norcembranoids, 5-epi-sinuleptolide (3) and sinuleptolide (4), were isolated from the soft coral Sinularia nanolobata. The structures of these metabolites were elucidated on the basis of extensive spectroscopic analysis. The anti-HCMV (human cytomegalovirus) activity of 1–4 and its cytotoxicity against selected cell lines were evaluated.
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Affiliation(s)
- Yen-Ju Tseng
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan; E-Mail:
| | - Shang-Kwei Wang
- Department of Microbiology, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung 804, Taiwan
- Authors to whom correspondence should be addressed; E-Mails: (S.-K.W.); (C.-Y.D.); Tel.: +886-7-312-1101 (ext. 2150) (S.-K.W.); +886-7-525-2000 (ext. 5036) (C.-Y.D.); Fax: +886-7-312-1101 (ext. 2151) (S.-K.W.); +886-7-525-5020 (C.-Y.D.)
| | - Chang-Yih Duh
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan; E-Mail:
- Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung 804, Taiwan
- Authors to whom correspondence should be addressed; E-Mails: (S.-K.W.); (C.-Y.D.); Tel.: +886-7-312-1101 (ext. 2150) (S.-K.W.); +886-7-525-2000 (ext. 5036) (C.-Y.D.); Fax: +886-7-312-1101 (ext. 2151) (S.-K.W.); +886-7-525-5020 (C.-Y.D.)
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Ibrahim-Ouali M, Romero E. Synthesis of various secosteroidal macrocycles by ring-closing metathesis. Steroids 2013; 78:651-61. [PMID: 23583599 DOI: 10.1016/j.steroids.2013.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 03/05/2013] [Accepted: 03/23/2013] [Indexed: 11/20/2022]
Abstract
We set out to describe an efficient and versatile method for preparing secosteroidal macrocycles from cholic acid, via an oxidative ring-expansion/ring-opening sequence and a ring-closing metathesis reaction as the key steps. The characteristic ¹H and ¹³C NMR spectroscopic features of the synthesized compounds are reported.
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Affiliation(s)
- Malika Ibrahim-Ouali
- CNRS Institut des Sciences Moléculaires de Marseille UMR 7313, Aix Marseille Université, 13397 Marseille, France.
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20
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Zhang J, Tang X, Li J, Li P, de Voogd NJ, Ni X, Jin X, Yao X, Li P, Li G. Cytotoxic polyketide derivatives from the South China Sea sponge Plakortis simplex. JOURNAL OF NATURAL PRODUCTS 2013; 76:600-606. [PMID: 23806071 DOI: 10.1021/np300771p] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Five new polyketides, plakortoxides A (1) and B (2), simplextones C (3) and D (4), and plakorsin D (5), together with six known analogues (6-11) were isolated from the South China Sea sponge Plakortis simplex. Their structures were identified by spectroscopic and chemical methods, including NMR, MS, and IR. Experimental and calculated ECD spectra and the modified Mosher's method were used to determine the absolute configurations. Structurally, both plakortoxides A and B feature a butenolide coupled to an epoxide moiety, while simplextones C and D consist of γ-butyrolactone and cyclopentane moieties, and plakorsin D is a furan acetic acid polyketide. The cytotoxic activities of the isolates were tested, and compounds 8, 10, and 11 showed potent cytotoxicity against both K562 and HeLa tumor cell lines with IC50 values ranging from 0.8 to 5.3 μM. Compound 3 showed significant inhibitory activity against c-Met kinase.
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Affiliation(s)
- Jinrong Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
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21
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Huang CY, Su JH, Duh CY, Chen BW, Wen ZH, Kuo YH, Sheu JH. A new 9,11-secosterol from the soft coral Sinularia granosa. Bioorg Med Chem Lett 2012; 22:4373-6. [PMID: 22672798 DOI: 10.1016/j.bmcl.2012.05.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 04/12/2012] [Accepted: 05/01/2012] [Indexed: 11/29/2022]
Abstract
Chemical investigations on the EtOAc-soluble fractions from the EtOH extract of Formosa soft coral afforded a new 9,11-secosteroid, 8αH-3β,11-dihydroxy-5α,6α-expoxy-24-methylene-9,11-secocholestan-9-one (1), along with one known steroid 3β,11-dihydroxy-5β,6β-expoxy-24-methylene-9,11-secocholestan-9-one (2) from Sinularia granosa. The structure of the new metabolite was elucidated on the basis of extensive spectroscopic analysis and by comparison of their NMR data with the known compounds, including 2. Both 1 and 2 were shown to significantly inhibit the accumulation of the pro-inflammatory inducible nitric oxide synthase protein, and 1 also was found to effectively reduce the level of cyclooxygenase-2 protein, in lipopolysaccharide-stimulated RAW264.7 macrophage cells at 10 μM. Furthermore, cytotoxic activity of 1 and 2 toward a limited panel of cancer cell lines was also discovered.
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Affiliation(s)
- Chiung-Yao Huang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan, ROC
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22
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Yan P, Deng Z, van Ofwegen L, Proksch P, Lin W. Lobophytones U - Z₁, biscembranoids from the Chinese soft coral Lobophytum pauciflorum. Chem Biodivers 2012; 8:1724-34. [PMID: 21922661 DOI: 10.1002/cbdv.201000244] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Chemical examination of a Chinese soft coral Lobophytum pauciflorum resulted in the isolation of seven new biscembranoids named lobophytones U-Z(1) (1-7, resp.), together with methyl sartortuoate (8) and nyalolide (9). The structures of the new compounds were elucidated by 1D- and 2D-NMR (COSY, HSQC, HMBC, and NOESY) spectroscopic analysis in association with MS and IR data. All compounds were tested against lipopolysaccharide (LPS)-induced nitric oxide (NO) release in mouse peritoneal macrophage. Lobophytone Z (6) inhibited NO production with an IC(50) value of 2.6 μM. Lobophytone H (1) showed inhibitory activities against the bacteria S. aureus and S. pneumoniae.
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Affiliation(s)
- Pengcheng Yan
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100083, P. R. China
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23
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Kongkathip B, Hasakunpaisarn A, Boonananwong S, Kongkathip N. Synthesis of cytotoxic novel 9,11-secosterol analogs: Structure/activity studies. Steroids 2010; 75:834-47. [PMID: 20470813 DOI: 10.1016/j.steroids.2010.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 04/27/2010] [Accepted: 05/03/2010] [Indexed: 10/19/2022]
Abstract
In an effort to determine the pharmaceutical utility and the structural requirements for activity against tumor cell lines, 30 novel 9,11-secosterol analogues with different side chains and degrees of oxidation at C-9 were synthesized starting from hecogenin. Evaluation of the synthesized compounds for cytotoxicity against KB, HeLa and MCF-7 cell lines revealed that some important structural features are required for activity. The presence of a cholesterol-type side chain, which appears to play a major role in determining the biological activity, the existence of a ketone functional at C-9 is also crucial for anticancer activity whereas hydroxyl/ketone function at C-22 on the side chain did not increase cytotoxicity.
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Affiliation(s)
- Boonsong Kongkathip
- Natural Products and Organic Synthesis Research Unit (NPOS), Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand.
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24
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Januar HI, Chasanah E, Motti CA, Tapiolas DM, Liptrot CH, Wright AD. Cytotoxic cembranes from Indonesian specimens of the soft coral Nephthea sp. Mar Drugs 2010; 8:2142-52. [PMID: 20714428 PMCID: PMC2920547 DOI: 10.3390/md8072142] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2010] [Revised: 07/06/2010] [Accepted: 07/09/2010] [Indexed: 11/16/2022] Open
Abstract
Methanol extracts of two specimens of the soft coral Nephthea sp. collected from the Seribu Islands, Indonesia, were active in an anticancer bioassay. One new (1) and four known diterpenes (2–5) based on the cembrane carbon skeleton were isolated from these extracts, as was arachidonic acid (8). The structures of all compounds were elucidated using NMR, including 1,1-ADEQUATE and 1D gradient selective NOESY where applicable to determine the relative stereochemistry. Spectroscopic data, including 1H and 13C NMR, UV, IR and optical rotations are reported when enough material was available and where this has not been done previously. Inhibition assays employing three cancer cell lines; SF-268 (CNS), MCF-7 (breast), and H460 (lung) were used to guide the isolation of all compounds.
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Affiliation(s)
- Hedi Indra Januar
- Indonesia Research Center for Marine and Fisheries Product Processing and Biotechnology, Jl. KS Tubun Petamburan VI, Jakarta 10260, Indonesia; E-Mails: (H.I.J.); (E.C.)
- Australian Institute of Marine Science, PMB No. 3, Townsville MC, Townsville, 4810, Australia; E-Mails: (C.A.M.); (D.M.T.)
| | - Ekowati Chasanah
- Indonesia Research Center for Marine and Fisheries Product Processing and Biotechnology, Jl. KS Tubun Petamburan VI, Jakarta 10260, Indonesia; E-Mails: (H.I.J.); (E.C.)
- Australian Institute of Marine Science, PMB No. 3, Townsville MC, Townsville, 4810, Australia; E-Mails: (C.A.M.); (D.M.T.)
| | - Cherie A. Motti
- Australian Institute of Marine Science, PMB No. 3, Townsville MC, Townsville, 4810, Australia; E-Mails: (C.A.M.); (D.M.T.)
| | - Dianne M. Tapiolas
- Australian Institute of Marine Science, PMB No. 3, Townsville MC, Townsville, 4810, Australia; E-Mails: (C.A.M.); (D.M.T.)
| | - Catherine H. Liptrot
- Australian Institute of Marine Science, PMB No. 3, Townsville MC, Townsville, 4810, Australia; E-Mails: (C.A.M.); (D.M.T.)
| | - Anthony D. Wright
- Australian Institute of Marine Science, PMB No. 3, Townsville MC, Townsville, 4810, Australia; E-Mails: (C.A.M.); (D.M.T.)
- University of Hawaii, College of Pharmacy, 34 Rainbow Drive, Hilo, HI 96720, USA
- * Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-808-933-2866; Fax: +1-808-443-5903
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25
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Bunyathaworn P, Boonananwong S, Kongkathip B, Kongkathip N. Further study on synthesis and evaluation of 3,16,20-polyoxygenated steroids of marine origin and their analogs as potent cytotoxic agents. Steroids 2010; 75:432-44. [PMID: 20188119 DOI: 10.1016/j.steroids.2010.02.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2009] [Revised: 02/11/2010] [Accepted: 02/11/2010] [Indexed: 11/26/2022]
Abstract
A series of new polyoxygenated steroid derivatives with various steroid skeleton moieties were synthesized. Antitumor activity of the compounds against three tumor cell lines (Breast cancer MCF7, lung cancer NCI and oral cancer KB) were evaluated. Compounds with aromatic A ring of this series exhibited the most potent cytotoxicities in all tested cells. The absence of OH at C-16 or lack of cholesterol like side chain at C-20 in the steroid skeleton apparently result in decreased cytotoxicity. The compound became inactive when the side chain contains double bond at C-24-C-25. When hydroxyl group at C-3 was protected no cytotoxicities against MCF7 and NCI and considerable low cytotoxicity against KB cell lines were observed.
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Affiliation(s)
- Potjamarn Bunyathaworn
- Natural Products and Organic Synthesis Research Unit (NPOS), Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Kasetsart University, 50 Phaholyotin Road, Chatuchak, Bangkok 10900, Thailand
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26
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Sarma NS, Krishna MS, Pasha SG, Rao TSP, Venkateswarlu Y, Parameswaran PS. Marine Metabolites: The Sterols of Soft Coral. Chem Rev 2009; 109:2803-28. [PMID: 19435309 DOI: 10.1021/cr800503e] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nittala S. Sarma
- School of Chemistry, Andhra University, Visakhapatnam-530 003, India, OCD I, Indian Institute of Chemical Technology, Hyderabad-500 007, India, and National Institute of Oceanography, Dona Paula, Goa-403 004, India
| | - Moturi S. Krishna
- School of Chemistry, Andhra University, Visakhapatnam-530 003, India, OCD I, Indian Institute of Chemical Technology, Hyderabad-500 007, India, and National Institute of Oceanography, Dona Paula, Goa-403 004, India
| | - Sk. Gouse Pasha
- School of Chemistry, Andhra University, Visakhapatnam-530 003, India, OCD I, Indian Institute of Chemical Technology, Hyderabad-500 007, India, and National Institute of Oceanography, Dona Paula, Goa-403 004, India
| | - Thota S. Prakasa Rao
- School of Chemistry, Andhra University, Visakhapatnam-530 003, India, OCD I, Indian Institute of Chemical Technology, Hyderabad-500 007, India, and National Institute of Oceanography, Dona Paula, Goa-403 004, India
| | - Y. Venkateswarlu
- School of Chemistry, Andhra University, Visakhapatnam-530 003, India, OCD I, Indian Institute of Chemical Technology, Hyderabad-500 007, India, and National Institute of Oceanography, Dona Paula, Goa-403 004, India
| | - P. S. Parameswaran
- School of Chemistry, Andhra University, Visakhapatnam-530 003, India, OCD I, Indian Institute of Chemical Technology, Hyderabad-500 007, India, and National Institute of Oceanography, Dona Paula, Goa-403 004, India
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Chao CH, Wen ZH, Wu YC, Yeh HC, Sheu JH. Cytotoxic and anti-inflammatory cembranoids from the soft coral Lobophytum crassum. JOURNAL OF NATURAL PRODUCTS 2008; 71:1819-1824. [PMID: 18973388 DOI: 10.1021/np8004584] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Five new cembranoids, namely, crassumolides A and B and D-F (1 and 2 and 4-6), along with four known metabolites, 7-10, were isolated from the soft coral Lobophytum crassum. Crassumolide C (3) was isolated for the first time from a natural source. The structures of these compounds were elucidated by extensive spectroscopic analysis and comparison of the NMR data with those of known analogues. The absolute stereochemistry of 1 was determined using the modified Mosher's method. Chemical transformation of 7 into the corresponding methyl ester 3 revealed the absolute stereochemistry of 3. Compounds 1, 3, and 7 were cytotoxic toward Ca9-22 cancer cells, and 10 was broadly cytotoxic toward all six test cancer cell lines used. Compounds 1, 3, 7, and 10 were found to inhibit the accumulation of the pro-inflammatory proteins iNOS and COX-2 at 10 μM.
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Affiliation(s)
- Chih-Hua Chao
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan, Republic of China
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28
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Rivera DG, Pando O, Bosch R, Wessjohann LA. A Biomimetic Approach for Polyfunctional Secocholanes: Tuning Flexibility and Functionality on Peptidic and Macrocyclic Scaffolds Derived from Bile Acids. J Org Chem 2008; 73:6229-38. [DOI: 10.1021/jo800708m] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniel G. Rivera
- Center for Natural Products Study, Faculty of Chemistry, University of Havana, 10400 Havana, Cuba, and Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
| | - Orlando Pando
- Center for Natural Products Study, Faculty of Chemistry, University of Havana, 10400 Havana, Cuba, and Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
| | - Rayser Bosch
- Center for Natural Products Study, Faculty of Chemistry, University of Havana, 10400 Havana, Cuba, and Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
| | - Ludger A. Wessjohann
- Center for Natural Products Study, Faculty of Chemistry, University of Havana, 10400 Havana, Cuba, and Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
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29
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Chao CH, Huang HC, Wu YC, Lu CK, Dai CF, Sheu JH. Glycolipids from the Formosan Soft Coral Lobophytum crassum. Chem Pharm Bull (Tokyo) 2007; 55:1720-3. [DOI: 10.1248/cpb.55.1720] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Chih-Hua Chao
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University
| | - Ho-Cheng Huang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University
- Department of Chemical and Materials Engineering, Cheng Shiu University
| | - Yang-Chang Wu
- Graduate Institute of Natural Products, Kaohsiung Medical University
| | - Chung-Kuang Lu
- National Museum of Marine Biology and Aquarium
- Institute of Marine Biotechnology, National Dong Hwa University
| | | | - Jyh-Horng Sheu
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University
- Asian Pacific Ocean Research Center, National Sun Yat-sen University
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30
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Wang LT, Wang SK, Soong K, Duh CY. New Cytotoxic Cembranolides from the Soft Coral Lobophytum michaelae. Chem Pharm Bull (Tokyo) 2007; 55:766-70. [PMID: 17473465 DOI: 10.1248/cpb.55.766] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Eleven new cytotoxic cembranolides, michaolides A-K (1-11), and crassolide (12) were isolated from the CH(2)Cl(2) extract of the Formosan soft coral Lobophytum michaelae. Their structures were established by extensive spectral analysis. The cytotoxicity of the isolates against selected cancer cells was measured in vitro.
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Affiliation(s)
- Li-Tang Wang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 804 Taiwan
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31
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Duh CY, Li CH, Wang SK, Dai CF. Diterpenoids, norditerpenoids, and secosteroids from the Formosan soft coral Cespitularia hypotentaculata. JOURNAL OF NATURAL PRODUCTS 2006; 69:1188-92. [PMID: 16933873 DOI: 10.1021/np0505465] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Four new cespitularane diterpenes, cesputularins I-L (1-4), two new norverticillane norditerpenes, cespitularins M and N (5 and 6), two new verticillane diterpenes, cespitularins O and P (7 and 8), a new norditerpene, cespitularin Q (9) (having a novel carbon skeleton), a new xenicane diterpene, cespitolide (10), and two new secosteroids, 3beta,11-dihydroxy-5beta,6beta-epoxy-9,11-secocholestan-9-one (11) and 3beta,11-dihydroxy-5beta,6beta-epoxy-9,11-secogorgostan-9-one (12), were isolated from the methylene chloride solubles of the Formosan soft coral Cespitularia hypotentaculata Roxas. The structures were elucidated by extensive spectroscopic analysis, and their cytotoxicity against selected cancer cells was measured in vitro.
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Affiliation(s)
- Chang-Yih Duh
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China.
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32
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Su JH, Tseng YJ, Huang HH, Ahmed AF, Lu CK, Wu YC, Sheu JH. 9,11-Secosterols from the soft corals Sinularia lochmodes and Sinularia leptoclados. JOURNAL OF NATURAL PRODUCTS 2006; 69:850-2. [PMID: 16724859 DOI: 10.1021/np060031t] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Chemical investigations on the EtOAc-soluble fractions from the EtOH extract of two Formosan soft corals afforded two new 9,11-secosteroids, 3beta,11-dihydroxy-5beta,6beta-epoxy-24-methylene-9,11-secocholestan-9-one (1) and 3beta,11-dihydroxy-24-methylene-9,11-secocholestan-9-one (2), from Sinularia lochmodes and Sinularia leptoclados, respectively, along with two known analogues (3 and 4) from S. leptoclados. The structures of the new metabolites were elucidated on the basis of extensive spectroscopic analysis and by comparison of their NMR data with those of the known compound 3. The cytotoxicity of 2-4 toward a limited panel of cancer cell lines is also reported.
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Affiliation(s)
- Jui-Hsin Su
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan, Republic of China
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Muralidhar P, Kumar MM, Krishna N, Rao CB, Rao DV. New Sphingolipids and a Sterol from a Lobophytum Species of the Indian Ocean. Chem Pharm Bull (Tokyo) 2005; 53:168-71. [PMID: 15684514 DOI: 10.1248/cpb.53.168] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chemical investigation of a soft coral species of the genus Lobophytum has resulted in the isolation of three new sphingolipids--(2S,3S,4R)-2-nonadecanoylamino-octadecane-1,3,4-triol (1), (2S,3R,4E,8E)-[(2'R)-2'-hydroxyheptadecanoylamino]-4,8-octadecadiene-1,3-diol (2), 1-O-(beta-D-glucopyranosyl)-(2S,3R,4E,8E)-2-[(2'R)-2'-hydroxynonadecanoylamino]-9-methyl-4,8-octadecadiene-1,3-diol (3) and a sterol--(24S)-ergost-5-en-3beta,7beta-diol (4) along with the known sphingolipid--(2S,3R,4E,8E)-2-hexadecanoylamino-4,8-octadecadien-1,3-diol (5) which showed cytotoxicity against human peripheral blood mononuclear cells (PBMC).
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Affiliation(s)
- Pendyala Muralidhar
- Department of Pharmaceutical Sciences, Andhra University, Visakhapatnam, India
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Abstract
This review describes the isolation from marine organisms of all secosteroids reported in the literature from 1972 to 2004. Secosteroids are highly oxidized metabolites with bond cleavage in the rings of the steroid tetracyclic nucleus. All secosteroids are grouped in accordance with their ring joined to side chain as 5,6-, 9,11-, 9,10- 8,9-, 8,14- and 13,17-secosteroids and the structures and the synthetic works, where available, are reported. Furthermore, this review gives details on the biological activities of the isolated secosteroids (e.g. antiproliferative, antifouling, antiinflammatory, antimicrobial, ichthyotoxic and antiviral).
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Affiliation(s)
- Donato Sica
- Dipartimento di Chimica Organica e Biochimica, Università degli Studi di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Via Cinthia, I-80126 Napoli, Italy.
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Khripach VA, Zhabinskii VN, Kuchto AI, Zhiburtovich YY, Fando GP, Lyakhov AS, Govorova AA, Groen MB, van der Louw J, de Groot A. Synthesis of 13,14-secotestosterone derivatives. Steroids 2004; 69:501-9. [PMID: 15246780 DOI: 10.1016/j.steroids.2004.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2003] [Revised: 04/20/2004] [Accepted: 04/27/2004] [Indexed: 11/19/2022]
Abstract
A number of testosterone analogs with a 13,14-secosteroidal fragment have been prepared from (13S)-13-iodo-6beta-methoxy-3alpha, 5-cyclo-13,14-seco-5alpha-androstan-14,17-dione. The key steps involved stereoselective deiodination of the starting compound with triphenylphosphine and selective protection of the 17-keto group with trimethylsilylcyanide. Removal of iodine at C-13 proceeded with inversion of the configuration at C-13, which has been established by X-ray crystallography. 13,14-Secotestosterone analogues substituted and non-substituted at C-14 have been prepared. The obtained compounds containing flexible CD ring fragments are of great interest for comparative studies in biological tests together with testosterone and other steroids with a rigid tetracyclic skeleton.
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Affiliation(s)
- Vladimir A Khripach
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich Street 5/2, 220141 Minsk.
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Anta C, González N, Rodríguez J, Jiménez C. A new secosterol from the Indonesian octocoral Pachyclavularia violacea. JOURNAL OF NATURAL PRODUCTS 2002; 65:1357-1359. [PMID: 12350166 DOI: 10.1021/np010592e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A new secosterol (1), along with pachyclavulariaenone B (3), was isolated from Pachyclavularia violacea. The structures of these compounds were established on the basis of the NMR and MS experiments.
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Affiliation(s)
- Cristina Anta
- Departamento de Química Fundamental, Facultade de Ciencias, Universidade de A Coruña, Spain
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Rueda A, Zubía E, Ortega MJ, Salvá J. Structure and cytotoxicity of new polyhydroxylated sterols from the Caribbean gorgonian Plexaurella grisea. Steroids 2001; 66:897-904. [PMID: 11711118 DOI: 10.1016/s0039-128x(01)00122-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The gorgonian Plexaurella grisea contains the new steroids 9-hydroxygorgosterol (1), 9,11 alpha,14-trihydroxygorgosterol (2), 5 beta,6 beta-epoxyergost-24(28)-ene-3 beta,7 beta-diol (3), ergost-24(28)-ene-3 beta,5 alpha,6 beta,7 beta-tetrol (4), an unseparable 1:1 mixture of the epimers (25R) and (25S)-26-acetoxy-3 beta,5 alpha-dihydroxyergost-24(28)-en-6-one (5/6), and seven related, known compounds (7-13). The structures of these new compounds were defined by spectroscopic analysis. All the compounds (1-13) isolated from P. grisea were tested against P 388, A 549, and HT 29 tumor cell lines. Compounds 3, 5/6, and 12 exhibited selective activity against the HT 29 cell line (ED(50) = 0.1 microg/ml).
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Affiliation(s)
- A Rueda
- Dpto. de Química Orgánica, Facultad de Ciencias del Mar, Universidad de Cádiz, Apdo. 40, 11510 Puerto Real, Cádiz, Spain
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