1
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Shaaban M, Ghani MA. Pyrane-based cembranoid and 2-dehydro-4-peroxy-sarcophine: two new diterpenes from Sarcophyton glaucum. Z NATURFORSCH C 2024; 79:81-87. [PMID: 38509702 DOI: 10.1515/znc-2024-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/03/2024] [Indexed: 03/22/2024]
Abstract
Soft corals, particularly Sarcophyton sp. are rich in metabolites with variety of biological activities. In this study, a pyran-based 9-exo-methylene-10-hydroxy-sarcotrocheliol (1) and 2-dehydro-4-peroxy-sarcophine (2), two new cembranoide diterpenes, were isolated together with 9-hydroxy-10,11-dehydro-sarcotrocheliol, sarcotrocheliol, sarcotrocheliol acetate, sarcophine, (+)-7α,8β-dihydroxydeepoxysarcophine, (±)-sarcophytonine B, and peridinin from the organic extract of Sarcophyton glaucum collected at the coasts of Hurghada, Egypt. The structures of the new diterpenes 1-2 were identified based on cumulative analyses of HRESIMS and NMR (1D/2D NMR) spectra. The relative configurations of both compounds were verified by NOESY spectra and comparison with our recently reported analogues. The compounds showed no antimicrobial activity against a set of diverse tested microorganisms.
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Affiliation(s)
- Mohamed Shaaban
- Chemistry of Natural Compounds Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, El-Behoos St. 33 12622 Dokki-Cairo, Egypt
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany
| | - Mohamed A Ghani
- Red Sea Marine Parks, PO Box 363, Red Sea, A.R, Hurghada, Egypt
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2
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Mohamed TA, Abdelmawgoud SM, Hamdy AA, Ibrahim MAA, Elshamy AI, Atia MAM, Kassem HA, Hegazy MEF, Selim NM. A new cembranoid from the Red Sea soft coral Sarcophyton acutum. Nat Prod Res 2024; 38:512-522. [PMID: 36200738 DOI: 10.1080/14786419.2022.2130915] [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: 06/13/2022] [Accepted: 09/25/2022] [Indexed: 10/10/2022]
Abstract
The Red Sea soft coral Sarcophyton acutum ethyl acetate extract has afforded one new cembranoid; sarcacutumolid A (1), along with six known metabolites have been isolated from S. acutum for the first time (2-7). Chemical structures were elucidated by employing several spectroscopic analyses. The cytotoxic potential of the isolated compounds was assessed against four human cancer cell lines; hepatocellular (HepG2), cervical (HeLa), breast (MCF-7) and colorectal cancer (Colo-205). Sarcacutumolid A (1) and gorgosterol (7) inhibited colorectal cancer cell proliferation in a concentration-dependent manner with IC50 values of 35.5 and 44.0 μM, respectively.
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Affiliation(s)
- Tarik A Mohamed
- Chemistry of Medicinal Plants Dept, Chemistry of Medicinal Plants, Dokki, Giza, Egypt
| | - Seba M Abdelmawgoud
- Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Giza, Egypt
| | - Abdelhamid A Hamdy
- Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Giza, Egypt
| | - Mahmoud A A Ibrahim
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia, Egypt
| | - Abdelsamed I Elshamy
- Department of Natural Compounds Chemistry, National Research Centre, Dokki, Giza, Egypt
| | - Mohamed A M Atia
- Molecular Genetics and Genome Mapping Laboratory, Genome Mapping Department, Agricultural Genetic Engineering Research Institute (AGERI), ARC, Giza, Egypt
| | - Hanaa A Kassem
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | | | - Nabil M Selim
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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3
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Ren L, Leng X, Li T, Liu J, Wang W, Yan X, Yan X, He S. Four new cembranoids from the South China Sea soft coral Sarcophyton trocheliophorum. Nat Prod Res 2023; 37:39-46. [PMID: 34569875 DOI: 10.1080/14786419.2021.1948041] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Four new cembrane diterpenes, 1,13-di-epi-13-acetoxy launine P (1), 13-oxo-thunbergol (2), isocrassumol B (3) and 7α, 8α-sarcophine (4), together with two known launine P (5) and sarcophytonin B (6), were isolated from the extract of the South China Sea soft coral Sarcophyton trocheliophorum. The structures were elucidated by spectroscopic analysis, ECD analysis and comparison with literature data. All compounds were tested for their antimicrobial activity and antiviral activity. Compounds 1, 2 and 5 were found to exhibit weak antibacterial activity, while 6 showed strong inhibition activity against Staphylococcus aureus and Bacillus subtilis (MIC<0.5 µg/mL). Compounds 2 showed moderate inhibitory effect against influenza A viruses H1N1 with IC50 of 17.8 μM.
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Affiliation(s)
- Lu Ren
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Xue Leng
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Te Li
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Jing Liu
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Wei Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education; School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
| | - Xiaojun Yan
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Xia Yan
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Shan He
- Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
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4
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Peng CC, Huang TY, Huang CY, Hwang TL, Sheu JH. Cherbonolides M and N from a Formosan Soft Coral Sarcophyton cherbonnieri. Mar Drugs 2021; 19:260. [PMID: 34062855 PMCID: PMC8170881 DOI: 10.3390/md19050260] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/23/2021] [Accepted: 04/28/2021] [Indexed: 12/24/2022] Open
Abstract
Two new isosarcophine derivatives, cherbonolides M (1) and N (2), were further isolated from a Formosan soft coral Sarcophyton cherbonnieri. The planar structure and relative configuration of both compounds were established by the detailed analysis of the IR, MS, and 1D and 2D NMR data. Further, the absolute configuration of both compounds was determined by the comparison of CD spectra with that of isosarcophine (3). Notably, cherbonolide N (2) possesses the unique cembranoidal scaffold of tetrahydrooxepane with the 12,17-ether linkage fusing with a γ-lactone. In addition, the assay for cytotoxicity of both new compounds revealed that they showed to be noncytotoxic toward the proliferation of A549, DLD-1, and HuCCT-1 cell lines. Moreover, the anti-inflammatory activities of both metabolites were carried out by measuring the N-formyl-methionyl-leucyl-phenylalanine/cytochalasin B (fMLF/CB)-induced generation of superoxide anion and elastase release in the primary human neutrophils. Cherbonolide N (2) was found to reduce the generation of superoxide anion (20.6 ± 6.8%) and the elastase release (30.1 ± 3.3%) in the fMLF/CB-induced human neutrophils at a concentration of 30 μM.
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Affiliation(s)
- Chia-Chi Peng
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; (C.-C.P.); (C.-Y.H.)
| | - Tzu-Yin Huang
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;
| | - Chiung-Yao Huang
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; (C.-C.P.); (C.-Y.H.)
| | - Tsong-Long Hwang
- Graduate Institute of Natural Products, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan;
- Research Center for Industry of Human Ecology and Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
- Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan
| | - Jyh-Horng Sheu
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; (C.-C.P.); (C.-Y.H.)
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan
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5
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Huang TY, Huang CY, Chen SR, Weng JR, Tu TH, Cheng YB, Wu SH, Sheu JH. New Hydroquinone Monoterpenoid and Cembranoid-Related Metabolites from the Soft Coral Sarcophyton tenuispiculatum. Mar Drugs 2020; 19:md19010008. [PMID: 33375440 PMCID: PMC7823492 DOI: 10.3390/md19010008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 12/23/2022] Open
Abstract
Chemical investigation of the marine soft coral Sarcophyton tenuispiculatum resulted in the isolation of a 1,4-dihydrobenzoquinone, sarcotenuhydroquinone (1), three new cembranoids, sarcotenusenes A‒C (2‒4), and ten previously reported metabolites 5–14. The chemical structures of all isolated metabolites were determined by detailed spectroscopic analyses. In biological assays, anti-inflammatory, cytotoxic, and peroxisome proliferator-activated receptor γ (PPAR-γ) transcription factor assays of all compounds were performed. None of the isolated compounds were found to exhibit activity in the PPAR-γ transcription factor assay. The anti-inflammatory assays showed that (+)-7α,8β-dihydroxydeepoxysarcophine (13) inhibited the production of IL-1β to 56 ± 1% at a concentration of 30 µM in lipopolysaccharide (LPS)-stimulated J774A.1 macrophage cells. In addition, 1 and 2 were found to exhibit cytotoxicity towards a panel of cancer cell lines.
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Affiliation(s)
- Tzu-Yin Huang
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; (T.-Y.H.); (J.-R.W.)
| | - Chiung-Yao Huang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan; (C.-Y.H.); (Y.-B.C.)
| | - Shu-Rong Chen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
| | - Jing-Ru Weng
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; (T.-Y.H.); (J.-R.W.)
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan; (C.-Y.H.); (Y.-B.C.)
| | - Tzu-Hsuan Tu
- Department of Oceanography, National Sun Yat-sen University, Kaohsiung 804, Taiwan;
| | - Yuan-Bin Cheng
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan; (C.-Y.H.); (Y.-B.C.)
| | - Shih-Hsiung Wu
- Institute of Biological Chemistry, Academia Sinica, Taipei 11529, Taiwan;
| | - Jyh-Horng Sheu
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; (T.-Y.H.); (J.-R.W.)
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan; (C.-Y.H.); (Y.-B.C.)
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan
- Correspondence: ; Tel.: +886-7-525-2000 (ext. 5030); Fax: +886-7-525-5020
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6
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Saleh HA, Raafat KM, Temraz TA, Noureldin N, Breitinger HG, Breitinger U. Sarcophine and (7S, 8R)-dihydroxydeepoxysarcophine from the Red Sea soft coral Sarcophyton glaucum as in vitro and in vivo modulators of glycine receptors. Neurotoxicology 2020; 80:105-111. [PMID: 32702364 DOI: 10.1016/j.neuro.2020.07.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 01/16/2023]
Abstract
The inhibitory glycine receptor (GlyR) is a key mediator of synaptic signalling in spinal cord, brain stem, and higher centres of the central nervous system. We examined the glycinergic activity of sarcophine (SN), a marine terpenoid known for its various biological activities, and its trans-diol derivative (7S, 8R)-dihydroxy-deepoxysarcophine (DSN). SN was isolated from the Red Sea soft coral Sacrophyton glaucum, DSN was semisynthesized by hydrolysis of the epoxide ring. In cytotoxicity tests against HEK293 cells, SN and DSN had LD50 values of 29.3 ± 3.0 mM and 123.5 ± 13.0 mM, respectively. Both compounds were tested against recombinant human α1 glycine receptors in HEK293 cells using whole-cell recording techniques. Both, SN and DSN were shown for the first time to be inhibitors of recombinant glycine receptors, with KIvalues of 2.1 ± 0.3 μM for SN, and 109 ± 9 μM for DSN. Receptor inhibition was also studied in vivo in a mouse model of strychnine toxicity. Surprisingly, in mouse experiments strychnine inhibition was not augmented by either terpenoid. While DSN had no significant effect on strychnine toxicity, SN even delayed strychnine effects. This could be accounted for by assuming that strychnine and sarcophine derivatives compete for the same binding site on the receptor, so the less toxic sarcophine can prevent strychnine from binding. The combination of modulatory activity and low level of toxicity makes sarcophines attractive structures for novel glycinergic drugs.
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Affiliation(s)
- Hesham A Saleh
- Department of Pharmaceutical Chemistry, German University in Cairo, New Cairo, Egypt
| | - Karim M Raafat
- Department of Biochemistry, German University in Cairo, New Cairo, Egypt
| | - Tarek A Temraz
- Department of Marine Sciences, Suez Canal University, Ismailia, Egypt
| | - Nazih Noureldin
- Department of Pharmaceutical Chemistry, German University in Cairo, New Cairo, Egypt.
| | | | - Ulrike Breitinger
- Department of Biochemistry, German University in Cairo, New Cairo, Egypt
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7
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Maloney KN, Botts RT, Davis TS, Okada BK, Maloney EM, Leber CA, Alvarado O, Brayton C, Caraballo-Rodríguez AM, Chari JV, Chicoine B, Crompton JC, Davis SR, Gromek SM, Kurnianda V, Quach K, Samples RM, Shieh V, Sultana CM, Tanaka J, Dorrestein PC, Balunas MJ, McFadden CS. Cryptic Species Account for the Seemingly Idiosyncratic Secondary Metabolism of Sarcophyton glaucum Specimens Collected in Palau. JOURNAL OF NATURAL PRODUCTS 2020; 83:693-705. [PMID: 31971803 DOI: 10.1021/acs.jnatprod.9b01128] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Sarcophyton glaucum is one of the most abundant and chemically studied soft corals with over 100 natural products reported in the literature, primarily cembrane diterpenoids. Yet, wide variation in the chemistry observed from S. glaucum over the past 50 years has led to its reputation as a capricious producer of bioactive metabolites. Recent molecular phylogenetic analysis revealed that S. glaucum is not a single species but a complex of at least seven genetically distinct species not distinguishable using traditional taxonomic criteria. We hypothesized that perceived intraspecific chemical variation observed in S. glaucum was actually due to differences between cryptic species (interspecific variation). To test this hypothesis, we collected Sarcophyton samples in Palau, performed molecular phylogenetic analysis, and prepared chemical profiles of sample extracts using gas chromatography-flame ionization detection. Both unsupervised (principal component analysis) and supervised (linear discriminant analysis) statistical analyses of these profiles revealed a strong relationship between cryptic species membership and chemical profiles. Liquid chromatography with tandem mass spectrometry-based analysis using feature-based molecular networking permitted identification of the chemical drivers of this difference between clades, including cembranoid diterpenes (2R,11R,12R)-isosarcophytoxide (5), (2S,11R,12R)-isosarcophytoxide (6), and isosarcophine (7). Our results suggest that early chemical studies of Sarcophyton may have unknowingly conflated different cryptic species of S. glaucum, leading to apparently idiosyncratic chemical variation.
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Affiliation(s)
- Katherine N Maloney
- Department of Chemistry, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Ryan T Botts
- Department of Mathematical, Information, and Computer Sciences, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
| | - Taylor S Davis
- Department of Chemistry, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
| | - Bethany K Okada
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Elizabeth M Maloney
- Department of Mathematical, Information, and Computer Sciences, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
| | - Christopher A Leber
- Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Oscar Alvarado
- Department of Chemistry, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
| | - Charlie Brayton
- Department of Biology, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Andrés Mauricio Caraballo-Rodríguez
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Jason V Chari
- Department of Chemistry, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
| | - Brent Chicoine
- Department of Chemistry, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
| | - J Chance Crompton
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Sydney R Davis
- Department of Chemistry, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, California 92106, United States
| | - Samantha M Gromek
- Division of Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Viqqi Kurnianda
- Department of Chemistry, Biology and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan
| | - Kim Quach
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Robert M Samples
- Division of Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Vincent Shieh
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Camille M Sultana
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Junichi Tanaka
- Department of Chemistry, Biology and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan
| | - Pieter C Dorrestein
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Marcy J Balunas
- Division of Medicinal Chemistry, Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Catherine S McFadden
- Department of Biology, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
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8
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New Antiproliferative Cembrane Diterpenes from the Red Sea Sarcophyton Species. Mar Drugs 2019; 17:md17070411. [PMID: 31336764 PMCID: PMC6669714 DOI: 10.3390/md17070411] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 06/28/2019] [Accepted: 07/08/2019] [Indexed: 12/20/2022] Open
Abstract
The combination of liquid chromatography coupled to high resolution mass spectrometry (LC-HRESMS)-based dereplication and antiproliferative activity-guided fractionation was applied on the Red Sea-derived soft coral Sarcophyton sp. This approach facilitated the isolation of five new cembrane-type diterpenoids (1–5), along with two known analogs (6 and 7), as well as the identification of 19 further, known compounds. The chemical structures of the new compounds were elucidated while using comprehensive spectroscopic analyses, including one-dimensional (1D) and two-dimensional (2D) NMR and HRMS. All of the isolated cembranoids (1–7) showed moderate in vitro antiproliferative activity against a human breast cancer cell line (MCF-7), with IC50 ranging from 22.39–27.12 µg/mL. This class of compounds could thus serve as scaffold for the future design of anticancer leads.
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9
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Moodie LWK, Sepčić K, Turk T, FrangeŽ R, Svenson J. Natural cholinesterase inhibitors from marine organisms. Nat Prod Rep 2019; 36:1053-1092. [PMID: 30924818 DOI: 10.1039/c9np00010k] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Covering: Published between 1974 up to 2018Inhibition of cholinesterases is a common approach for the management of several disease states. Most notably, cholinesterase inhibitors are used to alleviate the symptoms of neurological disorders like dementia and Alzheimer's disease and treat myasthenia gravis and glaucoma. Historically, most drugs of natural origin have been isolated from terrestrial sources and inhibitors of cholinesterases are no exception. However, the last 50 years have seen a rise in the quantity of marine natural products with close to 25 000 reported in the scientific literature. A number of marine natural products with potent cholinesterase inhibitory properties have also been reported; isolated from a variety of marine sources from algae to ascidians. Representing a diverse range of structural classes, these compounds provide inspirational leads that could aid the development of therapeutics. The current paper aims to, for the first time, comprehensively summarize the literature pertaining to cholinesterase inhibitors derived from marine sources, including the first papers published in 1974 up to 2018. The review does not report bioactive extracts, only isolated compounds, and a specific focus lies on compounds with reported dose-response data. In vivo and mechanistic data is included for compounds where this is reported. In total 185 marine cholinesterase inhibitors and selected analogs have been identified and reported and some of the compounds display inhibitory activities comparable or superior to cholinesterase inhibitors in clinical use.
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Affiliation(s)
- Lindon W K Moodie
- Department of Chemistry, University of Umeå, Umeå, SE-901 87, Sweden
| | - Kristina Sepčić
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Tom Turk
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Robert FrangeŽ
- Institute of Preclinical Sciences, Veterinary Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Johan Svenson
- Department of Chemistry and Materials, RISE Research Institutes of Sweden, Box 857, SE-501 15 Borås, Sweden.
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10
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Sawant SS, Youssef DT, Sylvester PW, Wali V, Sayed KAE. Antiproliferative Sesquiterpenes from the Red Sea Soft Coral Sarcophyton Glaucum. Nat Prod Commun 2019. [DOI: 10.1177/1934578x0700200201] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The Red Sea soft coral Sarcophyton glaucum was investigated for its sesquiterpene content. A novel 1,2-dioxolane sesquiterpene alcohol, dioxosarcoguaiacol (1) along with the known (+)-alloaromadendrene are reported. The structure of the new sesquiterpene was determined on the basis of extensive spectral analyses. (+)-Alloaromadendrene showed potent inhibition of the proliferation of the highly malignant + SA mammary epithelial cells at a dose of 20μM.
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Affiliation(s)
- Swapnali S. Sawant
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, 700 University Avenue, University of Louisiana at Monroe, Monroe, Louisiana 71209
| | - Diaa T.A. Youssef
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
| | - Paul W. Sylvester
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, 700 University Avenue, University of Louisiana at Monroe, Monroe, Louisiana 71209
| | - Vikram Wali
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, 700 University Avenue, University of Louisiana at Monroe, Monroe, Louisiana 71209
| | - Khalid A. El Sayed
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, 700 University Avenue, University of Louisiana at Monroe, Monroe, Louisiana 71209
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11
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Li S, Ye F, Zhu Z, Huang H, Mao S, Guo Y. Cembrane-type diterpenoids from the South China Sea soft coral Sarcophyton mililatensis. Acta Pharm Sin B 2018; 8:944-955. [PMID: 30505663 PMCID: PMC6251813 DOI: 10.1016/j.apsb.2018.06.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/10/2018] [Accepted: 06/12/2018] [Indexed: 01/28/2023] Open
Abstract
Eight cembrane-type diterpenoids, namely, (+)-(6R)-6-hydroxyisosarcophytoxide (1), (+)-(6R)-6-acetoxyisosarcophytoxide (2), (+)-17-hydroxyisosarcophytoxide (3), sarcomililatins A-D (4-7), and sarcomililatol (8), were isolated from the soft coral Sarcophyton mililatensis collected from Weizhou Island, Guangxi Autonomous Region, together with 2 known related analogues, (+)-isosarcophytoxide (9) and (+)-isosarcophine (10). The structures of these compounds were elucidated by a combination of detailed spectroscopic analyses, chemical methods, and comparison with reported data. The absolute configuration of compound 1 was established by the modified Mosher׳s method, while the absolute configurations of compounds 4 and 5 were assigned by electronic circular dichroism (ECD) spectroscopy and that of compound 8 was established by time-dependent density functional theory electronic circular dichroism (TD-DFT ECD) calculation. In in vitro bioassays, compound 9 displayed significant cytotoxicity against the human cancer cell lines human promyelocytic leukemia cells (HL-60) and human lung adenocarcinoma cells (A-549) with IC50 values of 0.78±0.21 and 1.26±0.80 μmol/L, respectively. Compounds 4 and 9 also showed moderate inhibitory effects on the TNFα-induced Nuclear factor kappa B (NF-κB, a therapeutical target in cancer) activation, showing IC50 values of 35.23±12.42 and 22.52±4.44 μmol/L, respectively.
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Affiliation(s)
- Songwei Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmacy, Nanchang University, Nanchang 330006, China
| | - Fei Ye
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zhengdan Zhu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hui Huang
- Key Laboratory of Marine Bio-resources Sustainable Utilization, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Shuichun Mao
- School of Pharmacy, Nanchang University, Nanchang 330006, China
| | - Yuewei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
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12
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Isolation and Structure Elucidation of Cembranoids from a Dongsha Atoll Soft Coral Sarcophyton stellatum. Mar Drugs 2018; 16:md16060210. [PMID: 29903990 PMCID: PMC6025080 DOI: 10.3390/md16060210] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 05/31/2018] [Accepted: 06/05/2018] [Indexed: 12/27/2022] Open
Abstract
Six new polyoxygenated cembrane-based diterpenoids, stellatumolides A–C (1–3), stellatumonins A and B (4 and 5), and stellatumonone (6), were isolated together with ten known related compounds (7–16) from the ethyl acetate (EtOAc) extract of soft coral Sarcophyton stellatum. The structures of the new compounds were established by extensive spectroscopic analyses, including 1D and 2D nuclear magnetic resonance (NMR) spectroscopy and data comparison with related structures. Compounds 8 and 14 were isolated from a natural source for the first time. The isolated metabolites were shown to be not cytotoxic against a limited panel of cancer cells. Compound 9 showed anti-inflammatory activity by reducing the expression of proinflammatory cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) proteins in lipopolysaccharide (LPS)-stimulated mouse leukaemic monocyte macrophage (RAW 264.7) cells.
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13
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Saeed A, Mehfooz H, Larik FA, Faisal M, Channar PA. Applications of Lawesson's reagent in the synthesis of naturally occurring steroids and terpenoids. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2017; 19:1114-1123. [PMID: 28357889 DOI: 10.1080/10286020.2017.1295229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 02/11/2017] [Indexed: 06/06/2023]
Abstract
Steroids and terpenoids are among the most biologically significant classes of natural products possessing a variety of biological activities. The replacement of one or more oxygen atoms in a steroid or terpenoid molecule by a heteroatom affects the chemical properties of that particular steroid or terpenoid, and that replacement often results in alterations of its biological properties, which is sometimes valuable. One possible modification is the thionation that could have some influence on such activity. Among the various thionating reagents, Lawesson's reagent was found to be most suitable and showed versatile properties, including chemoselectivity and functional group tolerance. In this review, we present the role of Lawesson's reagent in the synthesis of thioanalogues of natural steroids and terpenoids.
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Affiliation(s)
- Aamer Saeed
- a Department of Chemistry , Quaid-I-Azam University , Islamabad 45320 , Pakistan
| | - Haroon Mehfooz
- a Department of Chemistry , Quaid-I-Azam University , Islamabad 45320 , Pakistan
| | - Fayaz Ali Larik
- a Department of Chemistry , Quaid-I-Azam University , Islamabad 45320 , Pakistan
| | - Muhammad Faisal
- a Department of Chemistry , Quaid-I-Azam University , Islamabad 45320 , Pakistan
| | - Pervaiz Ali Channar
- a Department of Chemistry , Quaid-I-Azam University , Islamabad 45320 , Pakistan
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14
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Chao CH, Li WL, Huang CY, Ahmed AF, Dai CF, Wu YC, Lu MC, Liaw CC, Sheu JH. Isoprenoids from the Soft Coral Sarcophyton glaucum. Mar Drugs 2017; 15:md15070202. [PMID: 28653983 PMCID: PMC5532644 DOI: 10.3390/md15070202] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 06/16/2017] [Accepted: 06/22/2017] [Indexed: 01/22/2023] Open
Abstract
Five new isoprenoids, 3,4,8,16-tetra-epi-lobocrasol (1), 1,15β-epoxy-deoxysarcophine (2), 3,4-dihydro-4α,7β,8α-trihydroxy-Δ2-sarcophine (3), ent-sarcophyolide E (4), and 16-deacetyl- halicrasterol B (5) and ten known compounds 6‒15, were characterized from the marine soft coral Sarcophyton glaucum, collected off Taitung coastline. Their structures were defined by analyzing spectra data, especially 2D NMR and electronic circular dichroism (ECD). The structure of the known compound lobocrasol (7) was revised. Cytotoxicity potential of the isolated compounds was reported, too.
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Affiliation(s)
- Chih-Hua Chao
- School of Pharmacy, China Medical University, Taichung 404, Taiwan.
- Chinese Medicine Research and Development Center, China Medical University Hospital, Taichung 404, Taiwan.
| | - Wen-Liang Li
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
| | - Chiung-Yao Huang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
| | - Atallah F Ahmed
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Chang-Feng Dai
- Institute of Oceanography, National Taiwan University, Taipei 112, Taiwan.
| | - Yang-Chang Wu
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
- Research Center for Natural Products & Drug Development, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan.
| | - Mei-Chin Lu
- Graduate Institute of Marine Biotechnology, National Dong Hwa University, Pingtung 944, Taiwan.
- National Museum of Marine Biology & Aquarium, Pingtung 944, Taiwan.
| | - Chih-Chuang Liaw
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
| | - Jyh-Horng Sheu
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404, Taiwan.
- Frontier Center for Ocean Science and Technology, National Sun Yat-sen University, Kaohsiung 804, Taiwan.
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15
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Ruiz-Torres V, Encinar JA, Herranz-López M, Pérez-Sánchez A, Galiano V, Barrajón-Catalán E, Micol V. An Updated Review on Marine Anticancer Compounds: The Use of Virtual Screening for the Discovery of Small-Molecule Cancer Drugs. Molecules 2017; 22:E1037. [PMID: 28644406 PMCID: PMC6152364 DOI: 10.3390/molecules22071037] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/09/2017] [Accepted: 06/19/2017] [Indexed: 12/19/2022] Open
Abstract
Marine secondary metabolites are a promising source of unexploited drugs that have a wide structural diversity and have shown a variety of biological activities. These compounds are produced in response to the harsh and competitive conditions that occur in the marine environment. Invertebrates are considered to be among the groups with the richest biodiversity. To date, a significant number of marine natural products (MNPs) have been established as antineoplastic drugs. This review gives an overview of MNPs, both in research or clinical stages, from diverse organisms that were reported as being active or potentially active in cancer treatment in the past seventeen years (from January 2000 until April 2017) and describes their putative mechanisms of action. The structural diversity of MNPs is also highlighted and compared with the small-molecule anticancer drugs in clinical use. In addition, this review examines the use of virtual screening for MNP-based drug discovery and reveals that classical approaches for the selection of drug candidates based on ADMET (absorption, distribution, metabolism, excretion, and toxicity) filtering may miss potential anticancer lead compounds. Finally, we introduce a novel and publically accessible chemical library of MNPs for virtual screening purposes.
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Affiliation(s)
- Verónica Ruiz-Torres
- Institute of Molecular and Cell Biology (IBMC), Miguel Hernández University (UMH), Avda. Universidad s/n, Elche 03202, Spain.
| | - Jose Antonio Encinar
- Institute of Molecular and Cell Biology (IBMC), Miguel Hernández University (UMH), Avda. Universidad s/n, Elche 03202, Spain.
| | - María Herranz-López
- Institute of Molecular and Cell Biology (IBMC), Miguel Hernández University (UMH), Avda. Universidad s/n, Elche 03202, Spain.
| | - Almudena Pérez-Sánchez
- Institute of Molecular and Cell Biology (IBMC), Miguel Hernández University (UMH), Avda. Universidad s/n, Elche 03202, Spain.
| | - Vicente Galiano
- Physics and Computer Architecture Department, Miguel Hernández University, Avda. Universidad s/n, Elche 03202, Spain.
| | - Enrique Barrajón-Catalán
- Institute of Molecular and Cell Biology (IBMC), Miguel Hernández University (UMH), Avda. Universidad s/n, Elche 03202, Spain.
| | - Vicente Micol
- Institute of Molecular and Cell Biology (IBMC), Miguel Hernández University (UMH), Avda. Universidad s/n, Elche 03202, Spain.
- CIBER, Fisiopatología de la Obesidad y la Nutrición, CIBERobn, Instituto de Salud Carlos III., Palma de Mallorca 07122, Spain (CB12/03/30038).
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16
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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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17
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Mudit M, El Sayed KA. Cancer control potential of marine natural product scaffolds through inhibition of tumor cell migration and invasion. Drug Discov Today 2016; 21:1745-1760. [DOI: 10.1016/j.drudis.2016.06.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 06/29/2016] [Accepted: 06/30/2016] [Indexed: 01/14/2023]
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18
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Shaaban M, Ghani MA, Shaaban KA. Unusual pyranosyl cembranoid diterpene from Sarcophyton trocheliophorum. ACTA ACUST UNITED AC 2016. [DOI: 10.1515/znb-2016-0144] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
9-Hydroxy-10,11-dehydro-sarcotrocheliol (1), a new pyrane-based cembranoid diterpene, has been isolated along with three other known compounds, namely, sarcotrocheliol acetate (2), (+)-sarcophytol A (3), and (−)-sarcophytonin A (4), from the organic extract of the soft coral Sarcophyton trocheliophorum. The chemical structures of compounds 1–4 were determined on the basis of their 1D and 2D NMR [1H, 13C, 1H–1H correlation spectroscopy, heteronuclear multiple-quantum coherence, heteronuclear multiple-bond correlation, and nuclear Overhauser effect (NOE)] and mass spectra [electron ionization (EI), electrospray ionization, and high resolution mass spectrometry (HRMS)], and by comparison with related structures. The compounds 1–4 showed neither antimicrobial activity against 11 diverse tested microorganisms, nor cytotoxicity against brine shrimp, whereas the soft coral extract showed low cytotoxicity with a mortality rate of 1.7%.
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Affiliation(s)
- Mohamed Shaaban
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany
- Chemistry of Natural Compounds Department, Division of Pharmaceutical Industries, National Research Centre, El-Behoos st. 33, Dokki-Cairo 12622, A.R. Egypt
| | | | - Khaled A. Shaaban
- Institute of Organic and Biomolecular Chemistry, University of Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States of America
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States of America
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19
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Barnes EC, Kumar R, Davis RA. The use of isolated natural products as scaffolds for the generation of chemically diverse screening libraries for drug discovery. Nat Prod Rep 2016; 33:372-81. [DOI: 10.1039/c5np00121h] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This Highlight examines the use of isolated natural products as scaffolds in the semi-synthesis of drug discovery libraries, and the potential of this rarely used method to contribute to successful natural product library generation strategies.
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Affiliation(s)
- Emma C. Barnes
- Eskitis Institute for Drug Discovery
- Griffith University
- Brisbane
- Australia
- Leibniz Institute for Natural Product Research and Infection Biology HKI
| | - Rohitesh Kumar
- Eskitis Institute for Drug Discovery
- Griffith University
- Brisbane
- Australia
| | - Rohan A. Davis
- Eskitis Institute for Drug Discovery
- Griffith University
- Brisbane
- Australia
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20
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Bogdanov A, Kehraus S, Bleidissel S, Preisfeld G, Schillo D, Piel J, Brachmann AO, Wägele H, König GM. Defense in the aeolidoidean genus Phyllodesmium (Gastropoda). J Chem Ecol 2014; 40:1013-24. [PMID: 25244950 DOI: 10.1007/s10886-014-0496-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/03/2014] [Accepted: 07/23/2014] [Indexed: 10/24/2022]
Abstract
The genus Phyllodesmium (Aeolidoidea, Gastropoda) comprises shell-less marine snails, whose defense strategies are not well investigated yet. Here we report results of the first chemical investigation of P. briareum, as well as a re-investigation of P. longicirrum and P. magnum. Briarane diterpenes were isolated from P. briareum, and their origin could be traced to its prey organism Briareum sp. (Octocorallia). Considerable enrichment of the soft coral secondary metabolites in the slug was shown. Re-investigation of P. magnum led to isolation of cembrane diterpenes, 2-phenylethylamide, and furano sesquiterpenes. Sequestration of chemicals seems to have influenced speciation and evolution of Phyllodesmium species. Structural similarity or dissimilarity of particular slug metabolites suggests a closer, or more distant relationship of the respective Phyllodesmium taxa.
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Affiliation(s)
- Alexander Bogdanov
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115, Bonn, Germany
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21
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Liang LF, Guo YW. Terpenes from the soft corals of the genus Sarcophyton: chemistry and biological activities. Chem Biodivers 2014; 10:2161-96. [PMID: 24327439 DOI: 10.1002/cbdv.201200122] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Indexed: 11/07/2022]
Abstract
This review covers structural diversity and biological activities of terpenes from soft corals of the genus of Sarcophyton, reported from 1995 to July, 2011. During this period, besides undefined species, 16 species of the genus Sarcophyton, from different geographical areas, had been chemically examined. Two hundred and five terpenes had been isolated from this genus, including eleven sesquiterpenes, 165 diterpenes, 29 biscembranoids, some of which had novel skeletons. They exhibited various biological features, such as antifeedant, anti-inflammatory, antiviral, and antifouling activities.
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Affiliation(s)
- Lin-Fu Liang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhang Jiang Hi-Tech Park, Shanghai 201203, P. R. China, (phone: +86-21-50805813); Present address: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
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22
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Eltahawy NA, Ibrahim AK, Radwan MM, ElSohly MA, Hassanean HA, Ahmed SA. Cytotoxic cembranoids from the Red Sea soft coral, Sarcophyton auritum. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Kashman Y, Bodner M, Loya Y, Benayahu Y. Cembranolids from Marine Origin (Red Sea), Survey, and Isolation of a New Sinulariolide Derivative. Isr J Chem 2013. [DOI: 10.1002/ijch.197700002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Sarcophyolides B-E, new cembranoids from the soft coral Sarcophyton elegans. Mar Drugs 2013; 11:3186-96. [PMID: 24065160 PMCID: PMC3801120 DOI: 10.3390/md11093186] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 06/28/2013] [Accepted: 07/12/2013] [Indexed: 11/17/2022] Open
Abstract
Four new cembrane-type diterpenoids, sarcophyolides B–E (1–4), along with 11 known analogues were isolated from the soft coral Sarcophyton elegans. The structures of new compounds 1–4 were established on the basis of spectroscopic analysis and chemical conversion. The new cembranoids sarcophyolides B (1) and lobocrasol were found to exhibit potent inhibition against A2780 human ovarian tumor cells.
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25
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Abstract
This review covers the literature published in 2011 for marine natural products, with 870 citations (558 for the period January to December 2011) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1152 for 2011), together with the 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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26
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Abou El-Ezz RF, Ahmed SA, Radwan MM, Ayoub NA, Afifi MS, Ross SA, Szymanski PT, Fahmy H, Khalifa SI. Bioactive cembranoids from the Red Sea soft coral Sarcophyton glaucum. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Zhao M, Li X, Zhao F, Cheng S, Xiang Z, Dong J, Huang K, Yan P. Four New 7,8-Epoxycembranoids from a Chinese Soft Coral Lobophytum sp. Chem Pharm Bull (Tokyo) 2013; 61:1323-8. [DOI: 10.1248/cpb.c13-00612] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Min Zhao
- School of Pharmacy, Wenzhou Medical University
| | - Xiubao Li
- Key Laboratory of Marine Bio-resources Sustainable Utilization, South China Sea Institute of Oceanology, Chinese Academy of Sciences
| | - Feng Zhao
- School of Pharmacy, Wenzhou Medical University
| | | | - Zheng Xiang
- School of Pharmacy, Wenzhou Medical University
| | | | - Kexin Huang
- School of Pharmacy, Wenzhou Medical University
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28
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29
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Hassan HM, Sallam AA, Mohammed R, Hifnawy MS, Youssef DTA, El Sayed KA. Semisynthetic analogues of the marine cembranoid sarcophine as prostate and breast cancer migration inhibitors. Bioorg Med Chem 2011; 19:4928-34. [PMID: 21775154 DOI: 10.1016/j.bmc.2011.06.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 06/15/2011] [Accepted: 06/21/2011] [Indexed: 11/28/2022]
Abstract
Sarcophine (1) is a bioactive cembranoid diterpene isolated from the Red Sea soft coral Sarcophyton glaucum. Previous semisynthesis attempts resulted in decreased or complete loss of 1's anticancer activity. Sarcophine and analogues showed antimigratory activity against breast and prostate cancer cell lines. This encouraged further semisynthestic optimizations to improve its activity and establish a preliminary structure-activity relationship. Eight new and five known semisynthetic analogues were generated. These compounds were evaluated for their ability to inhibit growth, proliferation, and migration of the prostate and breast metastatic cancer cell lines PC-3 and MDA-MB-231, respectively. Most analogues exhibited enhanced antimigratory activity.
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Affiliation(s)
- Hossam M Hassan
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71201, USA
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30
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Tursch B, Braekman JC, Daloze D. Chemical Studies of Marine Invertebrates - XIII 2 - Hydroxynephtenol, a Novel Cembrane Diterpene from the Soft Coral Litophyton Viridis (Coelenterata, Octocorallia, Alcyonacea). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19750840711] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Groweiss A, Kashman Y, Vanderah DJ, Tursch B, Cornet P, Braekman JC, Daloze D. The structure of trocheliophorol, a cembranoid diterpene from soft corals of the genus SARCOPHYTON(1). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19780870405] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Albericci M, Braekman JC, Daloze D, Tursch B, Declercq JP, Germain G, van Meerssche M. Chemical Studies of Marine Invertebrates. XXXV(1). Sarcoglaucol, a Novel Cembrane Diterpene from the Soft Coral Sarcophyton Glaucum (Coelenterata, Octocorallia)(2). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19780870610] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cheng SY, Wang SK, Chiou SF, Hsu CH, Dai CF, Chiang MY, Duh CY. Cembranoids from the octocoral Sarcophyton ehrenbergi. JOURNAL OF NATURAL PRODUCTS 2010; 73:197-203. [PMID: 20099902 DOI: 10.1021/np900693r] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Chemical investigation of the octocoral Sarcophyton ehrenbergi led to the isolation of six new cembranoids, (+)-12-carboxy-11Z-sarcophytoxide (1), (+)-12-methoxycarbonyl-11Z-sarcophine (3), ehrenberoxides A-C (4-6), and lobophynin C (2), along with two known compounds, (+)-sarcophytoxide (7) and (+)-sarcophine (8). The structures of these isolated metabolites were elucidated through extensive spectroscopic analyses, while the relative configuration of 1 was confirmed by X-ray diffraction analyses. The chemical evidence combined with spectroscopic and physical data suggested that the locations of the epoxide and the methyl carboxylate for lobophynin C should be exchanged. Moreover, metabolites 1-6 were evaluated in vitro for their cytotoxicity against selected cancer and normal cells lines, antiviral activity against human cytomegalovirus, and antibacterial activity against Salmonella enteritidis.
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Affiliation(s)
- Shi-Yie Cheng
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan, Republic of China
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Wang J, Qi C, Ge Z, Cheng T, Li R. Efficient direct asymmetric vinylogous Michael addition reactions of γ-butenolides to chalcones catalyzed by vicinal primary-diamine salts. Chem Commun (Camb) 2010; 46:2124-6. [DOI: 10.1039/b923925a] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yao LG, Liu HL, Guo YW, Mollo E. New Cembranoids from the Hainan Soft CoralSarcophyton glaucum. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200800417] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Grote D, Shaker KH, Soliman HSM, Hegazi MM, Seifert K. Cembranoid Diterpenes from the Soft Corals Sarcophyton sp. and Sarcophyton Glaucum. Nat Prod Commun 2008. [DOI: 10.1177/1934578x0800300914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Two new cembrane diterpenes, 17-hydroxysarcophytoxide (1) and 7β-acetoxy-8α-hydroxydeepoxysarcophine (2), together with 7β,8α-dihydroxydeepoxysarcophine (3), sarcophytonin A (4) and (-)-β-elemene (5) have been isolated from the soft coral Sarcophyton sp. 7β-Hydroxy-8α-methoxydeepoxysarcophytoxide (6) and 7α,8β-dihydroxydeepoxysarcophytoxide (7) have been obtained from the soft coral Sarcophyton glaucum. The structures were determined primarily by NMR spectroscopy.
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Affiliation(s)
- Daniela Grote
- University of Bayreuth, Organic Chemistry, NW II, D-95440 Bayreuth, Germany
| | - Kamel H. Shaker
- University of Bayreuth, Organic Chemistry, NW II, D-95440 Bayreuth, Germany
| | - Hesham S. M. Soliman
- Helwan University, Faculty of Pharmacy, Pharmacognosy Department, P.O. Box 11795, Ain-Helwan, Cairo, Egypt
| | - Muhammmad M. Hegazi
- Suez Canal University, Faculty of Science, Marine Science Department, Ismailia, Egypt
| | - Karlheinz Seifert
- University of Bayreuth, Organic Chemistry, NW II, D-95440 Bayreuth, Germany
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Chen SH, Huang H, Guo YW. A new diterpenoid from the south China sea soft coral Lobophytum sp. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2008; 10:965-969. [PMID: 19003616 DOI: 10.1080/10286020802217655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A new cembrane-type diterpene, 11,12-epoxy-sarcophytoxide (1), along with five related diterpenoids (2, and 4-7), has been isolated from the soft coral Lobophytum sp. The structure of the new compound 1 was elucidated on the basis of detailed analysis of its spectroscopic data, and by comparing its NMR spectral data with those of the model compounds.
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Affiliation(s)
- Si-Han Chen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
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Nii K, Tagami K, Kijima M, Munakata T, Ooi T, Kusumi T. Acid-Catalyzed Reactions of Sarcophytoxide, a Marine Cembranoid: An Apparently Enantio-Directive Reaction, Unusual Products and Stereochemical Reconsideration of Epoxide–Ketone Rearrangement. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.562] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bilasy SES, Khalifa SI, Saleh SM, Abou El-Ela SH. HPLC method for the quantitative determination of sarcophine, a source of cembranoids with cancer chemopreventive activity. J Pharm Biomed Anal 2008; 46:784-7. [PMID: 18178355 DOI: 10.1016/j.jpba.2007.11.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2007] [Accepted: 11/21/2007] [Indexed: 11/28/2022]
Abstract
An accurate, reproducible and sensitive method for the quantitative determination of sarcophine in the organic extract of the Red Sea soft coral Sarcophyton species was developed and validated. Sarcophine concentration was determined by RP HPLC using ODS column. The mobile phase was made up of 70% acetonitrile in deionized water and the pH was adjusted to 3.5 with phosphoric acid. The flow rate was 1.5ml/min and the detector was set to 220nm. The HPLC analysis of several Sarcophyton glaucum samples collected from different locations in the Red Sea revealed that Hurghada had the highest sarcophine concentration.
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Grote D, Soliman HSM, Shaker KH, Hamza M, Seifert K. Cembranoid diterpenes and a briarane diterpene from corals. Nat Prod Res 2007; 20:285-91. [PMID: 16401561 DOI: 10.1080/14786410500087657] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Two new cembrane diterpenes (+)-polydactylide (1) and (+)-7alpha,8beta-dihydroxydeepoxysarcophine (2) together with (+)-sarcophine (3) and (+)-sarcophytoxide (4) have been isolated from the soft coral Sinularia polydactyla. The new cembrane diterpene (-)-7beta-hydroxy-8alpha-methoxydeepoxysarcophine (5) has been obtained from the soft coral Sarcophyton trocheliophorum and the known briarane diterpene briaexcavatolide W (6) from the gorgonian coral Briareum sp.The structures were determined primarily by NMR spectroscopy. The assignment of NMR signals was performed by means of (1)H-(1)H COSY, ROESY, HMQC and HMBC experiments.
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Affiliation(s)
- Daniela Grote
- University of Bayreuth, Organic Chemistry, NW II, D-95440 Bayreuth, Germany
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41
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Antiproliferative potential of sarcophine and its semisynthetic sulfur-containing derivatives against human mammary carcinoma cell lines. J Nat Med 2006. [DOI: 10.1007/s11418-006-0113-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sawant S, Youssef D, Mayer A, Sylvester P, Wali V, Arant M, El Sayed K. Anticancer and anti-inflammatory sulfur-containing semisynthetic derivatives of sarcophine. Chem Pharm Bull (Tokyo) 2006; 54:1119-23. [PMID: 16880655 DOI: 10.1248/cpb.54.1119] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Sarcophine (1), a cembranoid diterpene is known to inhibit the process of tumorigenesis. Sarcophine can be isolated in large amounts from the Red Sea soft coral Sarcophyton glaucum and hence is an ideal target for semisynthetic or biocatalytic modifications. Hydroxylated derivatives of 1 were reported to improve its anticancer activity. Despite the promising results and ready availability, there are limited attempts towards further diversifying the library of sarcophine derivatives. Hence, the current study targets the epoxide ring to generate sulfur-containing derivatives of sarcophine by reacting it with ammonium thiocyanate and Lawesson's reagent. Structure elucidation of the products was based on extensive 1D and 2D NMR and high resolution mass spectrometry, in addition to mechanistic considerations. The effect of these derivatives on highly malignant +SA mammary epithialial cell proliferation is reported. Anti-inflammatory potential of sarcophine and its derivatives is also demonstrated.
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Affiliation(s)
- Swapnali Sawant
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, 700 University Avenue, Monroe, LA 01209, USA
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. SEB, . SIK, . HS, . SMS, . SHAEE. Morphological, Chemical and Protein Characterization of the Red Sea Soft Coral Sarcophyton Species, a Comparative Study. ASIAN JOURNAL OF BIOCHEMISTRY 2006; 1:262-275. [DOI: 10.3923/ajb.2006.262.275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Sawant SS, Youssef DTA, Reiland J, Ferniz M, Marchetti D, El Sayed KA. Biocatalytic and antimetastatic studies of the marine cembranoids sarcophine and 2-epi-16-deoxysarcophine. JOURNAL OF NATURAL PRODUCTS 2006; 69:1010-3. [PMID: 16872134 DOI: 10.1021/np050527v] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The soft coral Sarcophyton glaucum is a rich resource of several bioactive cembranoids. Sarcophytol A (1) and sarcophine (2) are cembranoid diterpenes reported from this soft coral and extensively investigated for their cancer chemopreventive properties. This study aimed at investigating the antimetastatic potential of the major cembranoids, sarcophine (2) and 2-epi-16-deoxysarcophine (3), from the Red Sea soft coral S. glaucum. Biocatalytic transformation of 3 using Rhizopus stolonifer ATCC 6227a and Absidia spinosa ATCC 6648 afforded four new metabolites, 5-7 and 9, along with the known 9alpha-hydroxysarcophine (8). Sarcophine, 2-epi-16-deoxysarcophine, and metabolites 5-9 revealed significant antimetastatic activity against the highly metastatic mouse melanoma cell line (B16B15b). Cembranoids demonstrate a great potential for further development as antimetastatic agents.
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Affiliation(s)
- Swapnali S Sawant
- Department of Basic Pharmaceutical Sciences, College of Pharmacy, University of Louisiana at Monroe, 700 University Avenue, Monroe, Louisiana 71209, USA
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Jones S, Wilson I. Synthesis of substituted 3-furan-2(5H)-ones via an anthracene Diels–Alder sequence. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.04.097] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Yin SW, Shi YP, Li XM, Wang BG. A New Cembranoid Diterpene and Other Related Metabolites from the South-China-Sea Soft CoralLobophytum crassum. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690060] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
This review covers the literature published in 2004 for marine natural products, with 693 citations (491 for the period January to December 2004) 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 (716 for 2004), together with their relevant biological activities, source organisms and country of origin. Biosynthetic studies (8), and syntheses (80), including those 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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Sawant SS, Sylvester PW, Avery MA, Desai P, Youssef DTA, El Sayed KA. Bioactive rearranged and halogenated semisynthetic derivatives of the marine natural product sarcophine. JOURNAL OF NATURAL PRODUCTS 2004; 67:2017-2023. [PMID: 15620244 DOI: 10.1021/np0497393] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Cembranoids are natural diterpenes with 14-membered macrocyclic rings. The simplest natural cembranoid, (+)-cembrene, was isolated from pine oleoresin. Sarcophytols A and B are known cembranoids that inhibit tumor promotion. Sarcophine is a related cembranoid isolated from the Red Sea soft coral Sarcophyton glaucum. Sarcophine and its bioconversion products and semisynthetic derivatives are reported to possess cancer chemopreventive activity. Oxymercuration-demercuration of sarcophine using Hg(OAc)2 and NaBH4 afforded four new rearranged and hydroxylated products. Bromination of sarcophine with N-bromosuccinimide (NBS) furnished two new brominated and rearranged products. Reaction with iodine gave the known iso-sarcophinone and (+)-sarcophytoxin B. Structure elucidation was based on a combination of transition state modeling, molecular dynamics, mechanistic considerations, and 2D NMR data. The antiproliferative activity of the new products is also reported.
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Affiliation(s)
- Swapnali S Sawant
- Department of Basic Pharmaceutical Sciences, School of Pharmacy, University of Louisiana at Monroe, 700 University Avenue, Monroe, Louisiana 71209, USA
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Feller M, Rudi A, Berer N, Goldberg I, Stein Z, Benayahu Y, Schleyer M, Kashman Y. Isoprenoids of the soft coral Sarcophyton glaucum: Nyalolide, a new biscembranoid, and other terpenoids. JOURNAL OF NATURAL PRODUCTS 2004; 67:1303-1308. [PMID: 15332846 DOI: 10.1021/np040002n] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The chemical content of Sarcophyton glaucum, one of the more abundant soft corals on many coral reefs, collected from many seas, was thoroughly explored, resulting in the discovery of a large number of cembranoids, biscembranoids, sterols, and other secondary metabolites. The presently investigated Kenyan specimens of S. glaucum yielded three new metabolites, i.e., nyalolide (15), a biscembranoid, 16-oxosarcoglaucol acetate (16), a cembranoid, and the sesquiterpene guaiacophine (17). Nyalolide was also isolated from the Kenyan soft coral Sarcophyton elegans. The structures of the new compounds were elucidated by interpretation of their MS and 1D and 2D NMR experiments and, in the case of nyalolide, possessing 11 chiral centers, secured by X-ray diffraction analysis.
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Affiliation(s)
- Moran Feller
- School of Chemistry and Department of Zoology, Tel-Aviv University, Ramat Aviv 69978, Israel
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50
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Gross H, Wright AD, Beil W, König GM. Two new bicyclic cembranolides from a new Sarcophyton species and determination of the absolute configuration of sarcoglaucol-16-one. Org Biomol Chem 2004; 2:1133-8. [PMID: 15064788 DOI: 10.1039/b314332e] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
During the chemical investigation of a new species of soft coral belonging to the genus Sarcophyton, two novel cembranoid compounds with a 12Z double bond (1 and 2) were obtained. Determination of the double bond configurations was done using NMR spectroscopic data and the results of molecular modeling studies. Compound 3, one of several known compounds (3-5), was found to be cytotoxic toward an MCF7 tumor cell line.Additionally, we report the absolute stereochemistry of the cembrane sarcoglaucol-16-one (6), which was determined using the modified Mosher[prime or minute]s method.
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Affiliation(s)
- Harald Gross
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, D-53115 Bonn, Germany
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