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Zhu SH, Chang YM, Su MZ, Yao LG, Li SW, Wang H, Guo YW. Nine New Antibacterial Diterpenes and Steroids from the South China Sea Soft Coral Lobophytum catalai Tixier-Durivault. Mar Drugs 2024; 22:50. [PMID: 38276652 PMCID: PMC10817416 DOI: 10.3390/md22010050] [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: 12/28/2023] [Revised: 01/11/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
Five new cembrane-type diterpenes, lobocalines A-E (1-5), and four new steroids, lobocaloids A-D (9-12), along with six known related compounds (6-8 and 13-15) were isolated from the Yalong Bay soft coral Lobophytum catalai Tixier-Durivault. The structures of the new compounds were elucidated by extensive spectroscopic analysis, NMR calculation with DP4+ analysis, time-dependent density functional theory-electronic circular dichroism (TDDFT-ECD) calculations, X-ray diffraction analyses and comparison with the reported spectroscopic data of known compounds. Further, with the aid of X-ray diffraction analysis, the structure of lobocrasol B (15) was firmly revised as 15a. In in vitro bioassays, compound 2 showed moderate antibacterial activities against fish pathogenic bacteria Streptococcus parauberis KSP28 and Phoyobacterium damselae FP2244 with minimum inhibitory concentration (MIC) values of 8.7 and 17.3 µg/mL, respectively. All the steroids exhibited antibacterial activities against the S. parauberis KSP28 with MIC values ranging from 12.3 to 53.6 µg/mL. Compounds 2, 7 and 14 have remarkable inhibitory effects on the hemolysin production of Staphylococcus aureus, while compounds 8-12 have medium inhibitory effects on the pyocyanin production in Pseudomonas aeruginosa.
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Affiliation(s)
- Sheng-Hui Zhu
- School of Medicine, Shanghai University, Shanghai 200444, China;
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China; (Y.-M.C.); (M.-Z.S.); (L.-G.Y.)
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals and College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yuan-Min Chang
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China; (Y.-M.C.); (M.-Z.S.); (L.-G.Y.)
| | - Ming-Zhi Su
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China; (Y.-M.C.); (M.-Z.S.); (L.-G.Y.)
| | - Li-Gong Yao
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China; (Y.-M.C.); (M.-Z.S.); (L.-G.Y.)
| | - Song-Wei Li
- School of Medicine, Shanghai University, Shanghai 200444, 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
- School of Medicine, Shanghai University, Shanghai 200444, China;
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China; (Y.-M.C.); (M.-Z.S.); (L.-G.Y.)
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals and College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
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Marine Terpenic Endoperoxides. Mar Drugs 2021; 19:md19120661. [PMID: 34940660 PMCID: PMC8703521 DOI: 10.3390/md19120661] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/19/2021] [Accepted: 11/23/2021] [Indexed: 12/12/2022] Open
Abstract
Organic extracts of marine invertebrates, mainly sponges, from seas all over the world are well known for their high in vitro anticancer and antibiotic activities which make them promising sources of compounds with potential use as pharmaceutical leads. Most of the structures discovered so far have a peculiar structural feature in common: a 1,2-dioxane ring. This is a highly reactive heterocycle that can be considered as an endoperoxide function. Together with other structural features, this group could be responsible for the strong biological activities of the substances present in the extracts. Numerous research programs have focused on their structural elucidation and total synthesis since the seventies. As a consequence, the number of established chiral centres and the similarity between different naturally occurring substances is increasingly higher. Most of these compounds have a terpenoid nature, mainly diterpene and sesterterpene, with several peculiar structural features, such as the loss of one carbon atom. Although there are many reviews dealing with the occurrence of marine peroxides, their activities, or potential pharmaceutical uses, no one has focused on those having a terpene origin and the endoperoxide function. We present here a comprehensive review of these compounds paying special attention to their structural features and their biological activity.
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Ayyad SEN, Deyab MA, Kosbar T, Alarif WM, Eissa AH. Bio-active sesquiterpenoids and norsesquiternoids from the Red Sea octocoral Rhytisma fulvum fulvum. Nat Prod Res 2019; 35:4303-4310. [DOI: 10.1080/14786419.2019.1709187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Mohamed Ali Deyab
- Botany Department, Faculty of Science, Damietta University, Damietta, Egypt
| | - Tamer Kosbar
- Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt
| | - Walied Mohamed Alarif
- Department of Marine Chemistry, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ahmed Hassan Eissa
- Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt
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Rahelivao MP, Lübken T, Gruner M, Kataeva O, Ralambondrahety R, Andriamanantoanina H, Checinski MP, Bauer I, Knölker HJ. Isolation and structure elucidation of natural products of three soft corals and a sponge from the coast of Madagascar. Org Biomol Chem 2018; 15:2593-2608. [PMID: 28267183 DOI: 10.1039/c7ob00191f] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We investigated the three soft corals Sarcophyton stellatum, Capnella fungiformis and Lobophytum crassum and the sponge Pseudoceratina arabica, which have been collected at the coast of Madagascar. In addition to previously known marine natural products, S. stellatum provided the new (+)-enantiomer of the cembranoid (1E,3E,11E)-7,8-epoxycembra-1,3,11,15-tetraene (2). Capnella fungiformis afforded three new natural products, ethyl 5-[(1E,5Z)-2,6-dimethylocta-1,5,7-trienyl]furan-3-carboxylate (6), ethyl 5-[(1E,5E)-2,6-dimethylocta-1,5,7-trienyl]furan-3-carboxylate (7) and the diepoxyguaiane sesquiterpene oxyfungiformin (9a). The extracts of all three soft corals exhibited moderate activities against the malarial parasite Plasmodium falciparum. Extracts of the sponge Pseudoceratina arabica proved to be very active against a series of Gram-positive and Gram-negative bacteria.
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Affiliation(s)
| | - Tilo Lübken
- Department Chemie, Technische Universität Dresden, Bergstr. 66, 01069 Dresden, Germany.
| | - Margit Gruner
- Department Chemie, Technische Universität Dresden, Bergstr. 66, 01069 Dresden, Germany.
| | - Olga Kataeva
- A. M. Butlerov Chemistry Institute, Kazan Federal University, Kremlevskaya Str. 18, Kazan 420008, Russia
| | | | | | | | - Ingmar Bauer
- Department Chemie, Technische Universität Dresden, Bergstr. 66, 01069 Dresden, Germany.
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden, Bergstr. 66, 01069 Dresden, Germany.
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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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Galliani G. 1‐O‐alkylglycerols and fatty acids of cholesteryl esters in squid oil are fully saturated and show parallel relative abundance of chain lengths. A possible compartmented fatty alcohol cycle in squid. EUR J LIPID SCI TECH 2015. [DOI: 10.1002/ejlt.201500329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Cheng SY, Wang SK, Duh CY. Secocrassumol, a seco-cembranoid from the Dongsha Atoll soft coral Lobophytum crassum. Mar Drugs 2014; 12:6028-37. [PMID: 25522315 PMCID: PMC4278217 DOI: 10.3390/md12126028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 11/07/2014] [Accepted: 11/28/2014] [Indexed: 01/30/2023] Open
Abstract
Chemical investigations on the Dongsha Atoll soft coral Lobophytum crassum led to the purification of a new seco-cembranoid, secocrassumol. The structural elucidation was established by extensive NMR, HRESIMS and CD data. The absolute configuration at C-12 was determined as S using a modified Mosher's acylation. Secocrassumol differs from previously known marine seco-cembranoid in that it possesses an unprecedented skeleton functionalized at C11-C12 bond cleavage. Secocrassumol showed antiviral activity against human cytomegalovirus (HCMV) with an IC50 value of 5.0 μg/mL.
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Affiliation(s)
- Shi-Yie Cheng
- Department of Life Sciences, National University of Kaohsiung, Kaohsiung 811, Taiwan.
| | - Shang-Kwei Wang
- Department of Microbiology, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
| | - Chang-Yih Duh
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
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Wang SK, Duh CY. New cytotoxic cembranolides from the soft coral Lobophytum michaelae. Mar Drugs 2012; 10:306-318. [PMID: 22412802 PMCID: PMC3296998 DOI: 10.3390/md10020306] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 01/20/2012] [Accepted: 01/20/2012] [Indexed: 02/03/2023] Open
Abstract
Six new cembranolides, michaolides L–Q (1–6), and a known cembranolide, lobomichaolide (7) were isolated from the CH2Cl2 extract of the soft coral Lobophytum michaelae. Their structures were established by extensive spectral analysis. The anti-HCMV (human cytomegalovirus) activity of 1–7 and their cytotoxicity against selected cell lines were evaluated.
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Affiliation(s)
- Shang-Kwei Wang
- Department of Microbiology, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
| | - Chang-Yih Duh
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
- Asia-Pacific Ocean Research Center, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
- Author to whom correspondence should be addressed; ; Tel.: +886-7-525-2000 (ext. 5036); Fax: +886-7-525-5020
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9
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Lin ST, Wang SK, Duh CY. Cembranoids from the Dongsha Atoll soft coral Lobophytum crassum. Mar Drugs 2011; 9:2705-2716. [PMID: 22363246 PMCID: PMC3280576 DOI: 10.3390/md9122705] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 12/05/2011] [Accepted: 12/09/2011] [Indexed: 01/30/2023] Open
Abstract
Chemical investigation of the Dongsha Atoll soft coral Lobophytum crassum has afforded four new cembranoids, crassumols A-C (1-3) and 13-acetoxysarcophytoxide (4). The structures of these isolated compounds were elucidated by extensive NMR and HRESIMS experiments. The cytotoxicity and anti-HCMV (Human cytomegalovirus) activities of 1-4 were evaluated in vitro. Compound 4 exhibited cytotoxicity against A-549 (human lung carcinoma) cell line with an ED(50) of 3.6 μg/mL.
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Affiliation(s)
- Shih-Tseng Lin
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan;
| | - Shang-Kwei Wang
- Department of Microbiology, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Authors to whom correspondence should be addressed; (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: +886-7-525-5020 (C.-Y.D.)
| | - Chang-Yih Duh
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan;
- Asia-Pacific Ocean Research Center, National Sun Yat-sen University, Kaohsiung 804, Taiwan
- Authors to whom correspondence should be addressed; (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: +886-7-525-5020 (C.-Y.D.)
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New cembranolides from the Dongsha Atoll soft coral Lobophytum durum. Mar Drugs 2011; 9:1307-1318. [PMID: 21892346 PMCID: PMC3164374 DOI: 10.3390/md9081307] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 07/13/2011] [Accepted: 07/22/2011] [Indexed: 01/25/2023] Open
Abstract
Chemical investigations of the Dongsha Atoll soft coral Lobophytum durum resulted in the isolation of five new cembranolides, durumolides M-Q (1-5). The structures of compounds 1-5 were characterized by the interpretation of extensive spectroscopic analysis. Compound 4 exhibited cytotoxicity against P-388 (mouse lymphocytic leukemia) cell line with an ED₅₀ of 3.8 μg/mL. Moreover, compound 5 showed significant antiviral activity against human cytomegalovirus with an IC₅₀ of 5.2 μg/mL.
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Cheng SY, Lin ST, Wang SK, Duh CY. α-Tocopherols from the Formosan Soft CoralLobophytum crassum. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20110051] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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Li L, Wang CY, Shao CL, Guo YW, Li GQ, Sun XP, Han L, Huang H, Guan HS. Sarcoglycosides A - C, NewO-Glycosylglycerol Derivatives from the South China Sea Soft CoralSarcophyton infundibuliforme. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200900026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Smyrniotopoulos V, Vagias C, Roussis V. Sphaeroane and neodolabellane diterpenes from the red alga Sphaerococcus coronopifolius. Mar Drugs 2009; 7:184-95. [PMID: 19597580 PMCID: PMC2707042 DOI: 10.3390/md7020184] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2009] [Revised: 05/04/2009] [Accepted: 05/18/2009] [Indexed: 11/26/2022] Open
Abstract
Investigation of minor metabolites in the extracts of the red alga Sphaerococcus coronopifolius collected from the rocky coasts of Corfu Island in the Ionian Sea yielded two new diterpene alcohols, sphaerollanes I, and II (1, 2) featuring neodolabellane skeletons, and the new sphaeroane diterpene alcohol 16-hydroxy-9S*-acetoxy-8-epi-isosphaerodiene-2 (3), along with two previously reported metabolites 4, 5. The structures of the new natural products, as well as their relative stereochemistry, were elucidated on the basis of extensive spectral analysis, including 2D-NMR experiments.
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Affiliation(s)
- Vangelis Smyrniotopoulos
- Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece.
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Cheng SY, Wen ZH, Wang SK, Chiou SF, Hsu CH, Dai CF, Duh CY. Anti-inflammatory cembranolides from the soft coral Lobophytum durum. Bioorg Med Chem 2009; 17:3763-9. [PMID: 19433363 DOI: 10.1016/j.bmc.2009.04.053] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2009] [Revised: 04/23/2009] [Accepted: 04/24/2009] [Indexed: 11/16/2022]
Abstract
Chemical investigation of the soft coral Lobophytum durum resulted in the isolation of seven new cembranolides, durumolides F-L (1-7), as well as one previously characterized cembranolides, sinularolide D (8). The molecular structures of these isolated metabolites were determined mainly through NMR techniques and HRESIMS analysis. Moreover, the absolute configurations of 1 and 5 were established by application of modified Mosher's method. The antibacterial activities, anti-inflammatory effects, and anti-HCMV (Human cytomegalovirus) endonuclease activity of metabolites 1-8 were also evaluated in vitro. Anti-inflammatory activity of metabolites 1 and 6 (10 microM) significantly reduced the levels of the iNOS protein to 0.8+/-0.6% and 5.7+/-2.2%, respectively, and COX-2 protein to 47.8+/-9.0% and 71.6+/-5.8%, respectively. Metabolites 1-8 (100 microg/disk) exhibited weak 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
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Cheng SY, Wen ZH, Wang SK, Chiou SF, Hsu CH, Dai CF, Chiang MY, Duh CY. Unprecedented hemiketal cembranolides with anti-inflammatory activity from the soft coral Lobophytum durum. JOURNAL OF NATURAL PRODUCTS 2009; 72:152-155. [PMID: 19177635 DOI: 10.1021/np800686k] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Chemical investigations of the soft coral Lobophytum durum have led to the isolation of three unprecedented hemiketal cembranolides, durumhemiketalolides A-C (1-3). Full NMR spectroscopic assignments are provided for all isolated metabolites. The anti-inflammatory activities of 1-3 were evaluated in vitro.
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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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Cheng SY, Wen ZH, Chiou SF, Hsu CH, Wang SK, Dai CF, Chiang MY, Duh CY. Durumolides A–E, anti-inflammatory and antibacterial cembranolides from the soft coral Lobophytum durum. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.07.104] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Radhika P, Rao VL, Laatsch H. Chemical Constituents of a Marine Soft Coral of the Genus Lobophytum. Chem Pharm Bull (Tokyo) 2004; 52:1345-8. [PMID: 15516760 DOI: 10.1248/cpb.52.1345] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chemical investigations on the marine soft coral Lobophytum sp., collected from the Andaman and Nicobar Islands, yielded two new acyl glycerol monoalkyl ethers along with two known compounds of this series (1a-d), and a new ceramide (4a). The structures of the new and known compounds were elucidated on the basis of extensive spectroscopic studies and chemical reactions.
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Affiliation(s)
- Parvataneni Radhika
- Department of Pharmaceutical Sciences, Andhra University, Visakhapatnam 530-003, India.
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Li Y, Liu Z, Lan J, Li J, Peng L, Li WZ, Li Y, Chan AS. Enantioselective total synthesis of natural 11,12-epoxycembrene-C. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00982-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rashid MA, Gustafson KR, Boyd MR. HIV-inhibitory cembrane derivatives from a Philippines collection of the soft coral Lobophytum species. JOURNAL OF NATURAL PRODUCTS 2000; 63:531-533. [PMID: 10785433 DOI: 10.1021/np990372p] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Bioassay-guided fractionation of an aqueous extract of a Philippine Islands collection of the soft coralLobophytum sp. concentrated its HIV-inhibitory activity into fractions rich in cembranoid diterpenes. Lobohedleolide (1), (7Z)-lobohedleolide (2), and a new compound, 17-dimethylaminolobohedleolide (3), were purified from these fractions by HPLC. The structures of compounds 1-3 were elucidated by spectroscopic analyses and by comparison of their spectral data with previously reported values. The relative stereochemistry of the gamma-lactone ring substituents of 3 was determined by 1D NOESY experiments. While several other cembranoids that contain a dimethylamino functional group have been reported from the soft coral Sinularia sp., compound 3 represents the first cembrane diterpene with this functional group isolated from a Lobophytum species. Diterpenoids 1-3 exhibited moderate HIV-inhibitory activity (EC(50) approximately 3-5 microg/mL) in a cell-based in vitro anti-HIV assay.
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Affiliation(s)
- M A Rashid
- Laboratory of Drug Discovery Research and Development, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Frederick Cancer Research and Development Center, Frederick, MD 21702-1201, USA
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Rodríguez AD, González E, Ramírez C. The structural chemistry, reactivity, and total synthesis of dolabellane diterpenes. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)83033-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Bertello LE, Salto ML, de Lederkremer RM. Lipase-catalyzed monoesterification of 1-O-hexadecylglycerol in organic solvents. Lipids 1997; 32:907-11. [PMID: 9270985 DOI: 10.1007/s11745-997-0117-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A simple method is presented to esterify 1-O-hexadecyl-rac-glycerol using lipases in different organic solvents. The following fatty acids were used: C14:0, C16:0, C18:0, C18:1, and C18:2. Monoesterification was achieved by using a limiting amount of fatty acid. Both the 1-O-hexadecyl-3-O-acylglycerol and the 2-O-acylglycerol were obtained in a total yield of 75% and a ratio 7:1 in dichloromethane after 3 d. Chromatographic data for the monoesters, useful for the identification of the natural products, are given (gas-liquid chromatography, thin-layer chromatography, reverse-phase thin-layer chromatography). The structure was confirmed by a chemical synthesis of 1-O-hexadecyl-2-O-hexadecanoylglycerol. The 3-O-glyceride was also formed by acyl migration, as the minor component. The monoesters were separated by column chromatography and characterized by 1H and 13C nuclear magnetic resonance spectra.
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Affiliation(s)
- L E Bertello
- CIHIDECAR, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
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Bordier CG, Sellier N, Foucault AP, Le Goffic F. Purification and characterization of deep sea shark Centrophorus squamosus liver oil 1-O-alkylglycerol ether lipids. Lipids 1996; 31:521-8. [PMID: 8727645 DOI: 10.1007/bf02522646] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The 1-O-alkylglycerol composition of the liver oil of the deep sea shark Centrophorus squamosus, a species which provides edible flesh, has been determined. After various fractionations of the oil, the unsaponifiable fraction was characterized by means of gas chromatography/mass spectrometry, electron impact, and positive-ion chemical ionization. The oil is composed of 60% unsaponifiable matter, containing 45% squalene, 4.5% cholesterol, and 10% of linear saturated and monounsaturated glycerol ethers with 14-18 carbon atoms. After a first separation by chromatography on silicic acid, monounsaturated glycerol ethers have been separated from the saturated homologues, in particular from 1-O-octadecylglycerol (batyl alcohol) and 1-O-hexadecylglycerol (chimyl alcohol), via urea complexation. This newer application of the urea method, already used in the past to extract saturated from polyunsaturated fatty acids, allowed the purification of the main components of the complex unsaturated glycerol ether fraction, namely, 1-O-octadecen-9'ylglycerol (selachyl alcohol) and 1-O-hexadecen-9'ylglycerol.
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Affiliation(s)
- C G Bordier
- Laboratoire de Bioorganique et Biotechnologies, ENSCP-CNRS, Paris, France
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Jenny L, Borschberg HJ. Synthesis of the Dolabellane Diterpene Hydrocarbon (�)-?-araneosene. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780318] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bordier CG, Sellier N, Foucault AP, Le Goffic F. Characterization and purification of fatty acid methyl esters from the liver oil of the deep sea shark (Centrophorus squamosus) by gas chromatography-mass spectrometry and countercurrent chromatography. Chromatographia 1994. [DOI: 10.1007/bf02274522] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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