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Zong Y, Yang JJ, Li K, Pei YF, Hou HY, Zhang Y, Wang CL, Li PL. Litoamentenes A-K, eleven undescribed cembranoids with cytotoxicity from the South China Sea soft coral Litophyton amentaceum. PHYTOCHEMISTRY 2024; 223:114113. [PMID: 38697241 DOI: 10.1016/j.phytochem.2024.114113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/13/2024] [Accepted: 04/28/2024] [Indexed: 05/04/2024]
Abstract
Eleven undescribed cembrane-type diterpenoids, named litoamentenes A-K (1-11), were isolated from the soft coral Litophyton amentaceum collected from the South China Sea. Their structures were elucidated by extensive analysis of spectroscopic data, comparison with the literature data, single crystal X-ray diffraction, quantum chemical calculations and TDDFT-ECD calculations. This is the first systematic investigation of L. amentaceum. In particular, compounds 1-3 are cembrane-type norditerpenoids that lack isopropyl side chains. Compound 6 is a cembrane-type norditerpenoid without a methyl group at C-4, the first natural product identified with this carbon skeleton. Compounds 6, 9 and 10 showed modest cytotoxicity against several human cancer cell lines with IC50 values ranging from 3.99 to 14.56 μM.
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Affiliation(s)
- Yuan Zong
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China
| | - Jun-Jie Yang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China
| | - Kai Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China
| | - Yan-Fang Pei
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China
| | - Hui-Yue Hou
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China
| | - Yue Zhang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China
| | - Ci-Li Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China; State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Ping-Lin Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Department, Ocean University of China, Qingdao, Shandong, 266003, China; Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, Shandong 266235, China.
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Yan XY, Zhang L, Yang QB, Ge ZY, Liang LF, Guo YW. Genus Litophyton: A Hidden Treasure Trove of Structurally Unique and Diversely Bioactive Secondary Metabolites. Mar Drugs 2023; 21:523. [PMID: 37888458 PMCID: PMC10608288 DOI: 10.3390/md21100523] [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: 08/30/2023] [Revised: 09/21/2023] [Accepted: 09/26/2023] [Indexed: 10/28/2023] Open
Abstract
Marine soft corals are prolific sources of various natural products that have served as a wealthy reservoir of diverse chemical scaffolds with potential as new drug leads. The genus Litophyton contains almost 100 species but only a small proportion of them has been chemically investigated, which calls for more attentions from global researchers. In the current work, 175 secondary metabolites have been discussed, drawing from published data spanning almost five decades, up to July 2023. The studied species of the genus Litophyton resided in various tropical and temperate regions and encompassed a broad range of biologically active natural products including terpenes, steroids, nitrogen-containing metabolites, lipids, and other metabolites. A wide spectrum of pharmacological effects of these compounds had been evaluated, such as cytotoxic, antiviral, antibacterial, antifungal, anti-malarial, antifeedant, anti-inflammatory, molluscicidal, PTP1B inhibitory, insect growth inhibitory, and neuroprotective activities. This review aims to offer an up-to-date survey of the literature and provide a comprehensive understanding of the chemical structures, taxonomical distributions, and biological activities of the reported metabolites from the title genus whenever available.
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Affiliation(s)
- Xian-Yun Yan
- College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China; (X.-Y.Y.); (L.Z.); (Q.-B.Y.); (Z.-Y.G.)
| | - Ling Zhang
- College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China; (X.-Y.Y.); (L.Z.); (Q.-B.Y.); (Z.-Y.G.)
| | - Qi-Bin Yang
- College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China; (X.-Y.Y.); (L.Z.); (Q.-B.Y.); (Z.-Y.G.)
| | - Zeng-Yue Ge
- College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China; (X.-Y.Y.); (L.Z.); (Q.-B.Y.); (Z.-Y.G.)
| | - Lin-Fu Liang
- College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China; (X.-Y.Y.); (L.Z.); (Q.-B.Y.); (Z.-Y.G.)
| | - Yue-Wei Guo
- School of Medicine, Shanghai University, 99 Shangda Road, Bao Shan District, Shanghai 200444, China
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 198 Binhai East Road, High-tech Zone, Yantai 264117, China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
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Ahmed MMA, Ragab EA, Zayed A, El-Ghaly EM, Ismail SK, Khan SI, Ali Z, Chittiboyina AG, Khan IA. Litoarbolide A: an undescribed sesquiterpenoid from the Red Sea soft coral Litophyton arboreum with an in vitro anti-malarial activity evaluation. Nat Prod Res 2023; 37:542-550. [PMID: 35491702 DOI: 10.1080/14786419.2022.2071268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Soft corals distributed across the Red Sea coasts are a rich source of diverse and bioactive natural products. Chemical probing of the Red Sea soft coral Litophyton arboreum led to isolation and structural characterization of an undescribed sesquiterpenoid, litoarbolide A (1), along with 14 previously reported metabolites (2-15). The chemical structures of the isolates were assigned based on NMR as well as high resolution electrospray ionization mass spectrometry (HR-ESI-MS) data. Litoarbolide A is supposed to be the biosynthetic precursor to other sesquiterpenoids, which formed via further post-translational modifications. Furthermore, these metabolites were evaluated for anti-malarial activity, where only the acyclic sesquiterpenoid of a sec-germacrane nucleus (7) showed an activity against chloroquine-sensitive (D6) and chloroquine-resistant (W2) strains of Plasmodium falciparum with IC50 at 3.7 and 2.2 mg/mL, respectively. Moreover, the isolated metabolites were all non-toxic to the Vero cell line. These findings support the consideration of L. arboreum in further natural anti-malarial studies.
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Affiliation(s)
- Mohammed M A Ahmed
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt.,National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, Mississippi, United States.,Division of Pharmacognosy, Department of Biomolecular Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi, United States
| | - Ehab A Ragab
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Ahmed Zayed
- Department of Pharmacognosy, Tanta University, College of Pharmacy, Tanta, Egypt.,Institute of Bioprocess Engineering, Technical University of Kaiserslautern, Kaiserslautern, Germany
| | - Elsayed M El-Ghaly
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Said K Ismail
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Shabana I Khan
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, Mississippi, United States.,Division of Pharmacognosy, Department of Biomolecular Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi, United States
| | - Zulfiqar Ali
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, Mississippi, United States
| | - Amar G Chittiboyina
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, Mississippi, United States
| | - Ikhlas A Khan
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, Mississippi, United States.,Division of Pharmacognosy, Department of Biomolecular Sciences, School of Pharmacy, The University of Mississippi, University, Mississippi, United States
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Marine Terpenic Endoperoxides. Mar Drugs 2021; 19:md19120661. [PMID: 34940660 PMCID: PMC8703521 DOI: 10.3390/md19120661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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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Li SW, Mudianta IW, Cuadrado C, Li G, Yudasmara GA, Setiabudi GI, Daranas AH, Guo YW. Litosetoenins A-E, Diterpenoids from the Soft Coral Litophyton setoensis, Backbone-Rearranged through Divergent Cyclization Achieved by Epoxide Reactivity Inversion. J Org Chem 2021; 86:11771-11781. [PMID: 34338508 DOI: 10.1021/acs.joc.1c01218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Litosetoenins A-E (1-5), five new ring-rearranged serrulatane-type diterpenoids with a common tricyclo[3.0.4]decane core, along with a known diterpenoid glycoside (6), a related known diterpenoid (7), and four known sesquiterpenoids (8-11), were isolated from a Balinese soft coral Litophyton setoensis. Spirolitosetoenin A (5a) and isospirolitosetoenin A (5b), featuring an unprecedented spiro[4,5]decane core, were obtained after treatment of compound 5 with HCl in methanol. The structures of new compounds were elucidated by extensive spectroscopic analysis, quantum mechanical nuclear magnetic resonance approach, and chemical methods. A plausible biosynthetic pathway involving an unusual divergent biogenesis was proposed.
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Affiliation(s)
- Song-Wei Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - I Wayan Mudianta
- Department of Chemistry, Universitas Pendidikan Ganesha, Bali 81116, Indonesia
| | - Cristina Cuadrado
- Instituto de Productos Naturales y Agrobiología, Consejo Superior de Investigaciones Científicas (IPNA-CSIC), La Laguna, Tenerife 38206, Spain
| | - Geng Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - Gede A Yudasmara
- Study Program of Aquaculture, Universitas Pendidikan Ganesha, Bali 81116, Indonesia
| | - Gede I Setiabudi
- Study Program of Aquaculture, Universitas Pendidikan Ganesha, Bali 81116, Indonesia
| | - Antonio H Daranas
- Instituto de Productos Naturales y Agrobiología, Consejo Superior de Investigaciones Científicas (IPNA-CSIC), La Laguna, Tenerife 38206, Spain
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
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Yang F, Hua Q, Yao LG, Liang LF, Lu YH, An FL, Guo YW. Further new nardosinane-type sesquiterpenoids from the Xisha soft coral Litophyton nigrum. Fitoterapia 2021; 151:104906. [PMID: 33857589 DOI: 10.1016/j.fitote.2021.104906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/02/2021] [Accepted: 04/06/2021] [Indexed: 10/21/2022]
Abstract
Further chemical investigation of the Xisha soft coral Litophyton nigrum has resulted in the isolation of four new nardosinane-type sesquiterpenoids, namely linardosinenes D-G (1-4). The structures of new compounds were elucidated by extensive analyses of their spectroscopic data and by comparison with the reported data of known related ones. All compounds exhibited weak inhibitory effect against bromodomain-containing protein 4 (BRD4), a promising therapeutic target in various human diseases, at a concentration of 10 μM.
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Affiliation(s)
- Fan Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China; State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China; Biology Department, College of Life and Environment Science, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China
| | - Qiang Hua
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China
| | - Li-Gong Yao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China
| | - Lin-Fu Liang
- College of Materials Science and Engineering, Central South University of Forestry and Technology, 498 South Shaoshan Road, Changsha 410004, China
| | - Yan-Hua Lu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China
| | - Fa-Liang An
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China; Shanghai Collaborative Innovation Center for Biomanufacturing Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China.
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai 201203, China.
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Ermolenko EV, Imbs AB, Gloriozova TA, Poroikov VV, Sikorskaya TV, Dembitsky VM. Chemical Diversity of Soft Coral Steroids and Their Pharmacological Activities. Mar Drugs 2020; 18:E613. [PMID: 33276570 PMCID: PMC7761492 DOI: 10.3390/md18120613] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/21/2020] [Accepted: 11/26/2020] [Indexed: 02/07/2023] Open
Abstract
The review is devoted to the chemical diversity of steroids produced by soft corals and their determined and potential activities. There are about 200 steroids that belong to different types of steroids such as secosteroids, spirosteroids, epoxy- and peroxy-steroids, steroid glycosides, halogenated steroids, polyoxygenated steroids and steroids containing sulfur or nitrogen heteroatoms. Of greatest interest is the pharmacological activity of these steroids. More than 40 steroids exhibit antitumor and related activity with a confidence level of over 90 percent. A group of 32 steroids shows anti-hypercholesterolemic activity with over 90 percent confidence. Ten steroids exhibit anti-inflammatory activity and 20 steroids can be classified as respiratory analeptic drugs. Several steroids exhibit rather rare and very specific activities. Steroids exhibit anti-osteoporotic properties and can be used to treat osteoporosis, as well as have strong anti-eczemic and anti-psoriatic properties and antispasmodic properties. Thus, this review is probably the first and exclusive to present the known as well as the potential pharmacological activities of 200 marine steroids.
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Affiliation(s)
- Ekaterina V. Ermolenko
- A.V. Zhirmunsky National Scientific Center of Marine Biology, 17 Palchevsky Str., 690041 Vladivostok, Russia; (E.V.E.); (A.B.I.); (T.V.S.)
| | - Andrey B. Imbs
- A.V. Zhirmunsky National Scientific Center of Marine Biology, 17 Palchevsky Str., 690041 Vladivostok, Russia; (E.V.E.); (A.B.I.); (T.V.S.)
| | - Tatyana A. Gloriozova
- Institute of Biomedical Chemistry, bldg. 8, 10 Pogodinskaya Str., 119121 Moscow, Russia; (T.A.G.); (V.V.P.)
| | - Vladimir V. Poroikov
- Institute of Biomedical Chemistry, bldg. 8, 10 Pogodinskaya Str., 119121 Moscow, Russia; (T.A.G.); (V.V.P.)
| | - Tatyana V. Sikorskaya
- A.V. Zhirmunsky National Scientific Center of Marine Biology, 17 Palchevsky Str., 690041 Vladivostok, Russia; (E.V.E.); (A.B.I.); (T.V.S.)
| | - Valery M. Dembitsky
- A.V. Zhirmunsky National Scientific Center of Marine Biology, 17 Palchevsky Str., 690041 Vladivostok, Russia; (E.V.E.); (A.B.I.); (T.V.S.)
- Centre for Applied Research, Innovation and Entrepreneurship, Lethbridge College, 3000 College Drive South, Lethbridge, AB T1K 1L6, Canada
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Abdelhafez OH, Fahim JR, Desoukey SY, Kamel MS, Abdelmohsen UR. Recent Updates on Corals from Nephtheidae. Chem Biodivers 2019; 16:e1800692. [PMID: 30957385 DOI: 10.1002/cbdv.201800692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 04/04/2019] [Indexed: 01/04/2023]
Abstract
Marine natural products display a wide range of biological activities, which play a vital role in the innovation of lead compounds for the drug development. Soft corals have been ranked at the top in regard to the discovery of bioactive metabolites with potential pharmaceutical applications. Many of the isolated cembranoids revealed diverse biological activities, such as anticancer, antidiabetic and anti-osteoporosis. Likewise, sterols from soft corals exhibited interesting biological potential as anti-inflammatory, antituberculosis and anticancer. Consequently, investigating marine soft corals will definitely lead to the discovery of a large number of chemically varied secondary metabolites with countless bioactivities for possible applications in medicine and pharmaceutical industry. This review provides a complete survey of all metabolites isolated from the family Nephtheidae, from 2011 until November 2018, along with their natural sources and biological potential whenever possible.
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Affiliation(s)
- Omnia Hesham Abdelhafez
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone, P.O. Box 61111, New Minia City, Minia, 61519, Egypt
| | - John Refaat Fahim
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519, Minia, Egypt
| | - Samar Yehia Desoukey
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519, Minia, Egypt
| | - Mohamed Salah Kamel
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone, P.O. Box 61111, New Minia City, Minia, 61519, Egypt
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Abou El-Kassem LT, Hawas UW, El-Desouky SK, Al-Farawati R. Sesquiterpenes from the Saudi Red Sea: Litophyton arboreum with their cytotoxic and antimicrobial activities. ACTA ACUST UNITED AC 2017; 73:9-14. [DOI: 10.1515/znc-2017-0037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 07/24/2017] [Indexed: 11/15/2022]
Abstract
Abstract
A new pseudoguaiane-type sesquiterpene named litopharbol (1) was isolated from the methanolic extract of the Red Sea soft coral Litophyton arboreum, along with known sesquiterpenoids alismol (2), alismorientol B (3), teuhetenone A (4), and calamusin I (5); steroid, 24-methyl-cholesta-5,24(28)-diene-3β-ol (6), alkyl glyceryl ether, chimyl alcohol (7); sphingolipid, erythro-N-dodecanoyl-docosasphinga-(4E,8E)-dienine (8); and nitrogenous bases, thymine (9) and thymidine (10). The structures were determined on the basis of nuclear magnetic resonance (NMR) spectroscopic (1D and 2D NMR data including heteronuclear single quantum coherence spectroscopy, heteronuclear multiple-bond correlation spectroscopy, and nuclear Overhauser effect spectroscopy) and mass spectrometric analyses. Compounds 1–5 were explored for antimicrobial activity and cancer cell line sensitivity tests. Compound 1 exhibited antibacterial activity against Bacillus cereus with a minimum inhibition concentration of 1.8 μg/mL, whereas compound 3 showed significant potent cytotoxic effect against MCF-7 (breast cancer cells) with IC50 4.32 μM.
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Affiliation(s)
| | - Usama W. Hawas
- Marine Chemistry Department , Faculty of Marine Sciences , King Abdulaziz University , Jeddah 21589 , Kingdom of Saudi Arabia
- Phytochemistry and Plant Systematic Department , National Research Centre , Dokki 12311, Cairo , Egypt , Tel.: +966-5424-68093; Fax: +966-2640-1747
| | - Samy K. El-Desouky
- Chemistry Department , Faculty of Science , Jazan University , Jazan 2097 , Kingdom of Saudi Arabia
- Phytochemistry and Plant Systematic Department , National Research Centre , Dokki 12311, Cairo , Egypt
| | - Radwan Al-Farawati
- Marine Chemistry Department , Faculty of Marine Sciences , King Abdulaziz University , Jeddah 21589 , Kingdom of Saudi Arabia
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Abstract
Covering: 2015. Previous review: Nat. Prod. Rep., 2016, 33, 382-431This review covers the literature published in 2015 for marine natural products (MNPs), with 1220 citations (792 for the period January to December 2015) 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 (1340 in 429 papers for 2015), together with the relevant biological activities, source organisms and country of origin. Reviews, 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.
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Murray H G Munro
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | - Michèle R Prinsep
- Chemistry, School of Science, University of Waikato, Hamilton, New Zealand
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