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Li DC, Liang HX, Liao XJ, Xing XW, Xu SH, Zhao BX. Two New Pairs of Enantiomeric Butenolides from the Marine Sponge Suberties sp. Chem Biodivers 2023; 20:e202300950. [PMID: 37477082 DOI: 10.1002/cbdv.202300950] [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: 06/29/2023] [Revised: 07/21/2023] [Accepted: 07/21/2023] [Indexed: 07/22/2023]
Abstract
Two new pairs of enantiomeric butenolides, (+)- and (-)-suberiteslide A, (+)- and (-)-subertieslide B had been obtained from the marine sponge Suberties sp. The structures with absolute configurations of these compounds were unequivocally determined by spectroscopic analyses and ECD (Electronic Circular Dichroism) method. It was the first separation of butenolides from the marine sponges of genus Suberites. Additionally, the anti-inflammatory, antibacterial and cytotoxic activities of these compounds were evaluated. The result indicated that only (-)-subertieslide B showed weak anti-inflammatory activity with the IC50 value of 40.8 μM.
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Affiliation(s)
- Dai-Chun Li
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, P. R. China
| | - Hui-Xian Liang
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, P. R. China
| | - Xiao-Jian Liao
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, P. R. China
| | - Xi-Wen Xing
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, P. R. China
| | - Shi-Hai Xu
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, P. R. China
| | - Bing-Xin Zhao
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, P. R. China
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2
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Bracegirdle J, Olsen SSH, Teng MN, Tran KC, Amsler CD, McClintock JB, Baker BJ. Neosuberitenone, a New Sesterterpenoid Carbon Skeleton; New Suberitenones; and Bioactivity against Respiratory Syncytial Virus, from the Antarctic Sponge Suberites sp. Mar Drugs 2023; 21:md21020107. [PMID: 36827148 PMCID: PMC9964336 DOI: 10.3390/md21020107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/16/2023] [Accepted: 01/25/2023] [Indexed: 02/04/2023] Open
Abstract
Respiratory syncytial virus (RSV) is a highly contagious human pathogen that poses a significant threat to children under the age of two, and there is a current need for new small molecule treatments. The Antarctic sponge Suberites sp. is a known source of sesterterpenes, and following an NMR-guided fractionation procedure, it was found to produce several previously unreported metabolites. Neosuberitenone (1), with a new carbon scaffold herein termed the 'neosuberitane' backbone, six suberitenone derivatives (2-7), an ansellane-type terpenoid (8), and a highly degraded sesterterpene (9), as well as previously reported suberitenones A (10) and B (11), were characterized. The structures of all of the isolated metabolites including absolute configurations are proposed on the basis of NMR, HRESIMS, optical rotation, and XRD data. The biological activities of the metabolites were evaluated in a range of infectious disease assays. Suberitenones A, B, and F (3) were found to be active against RSV, though, along with other Suberites sp. metabolites, they were inactive in bacterial and fungal screens. None of the metabolites were cytotoxic for J774 macrophages or A549 adenocarcinoma cells. The selectivity of suberitenones A, B, and F for RSV among other infectious agents is noteworthy.
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Affiliation(s)
- Joe Bracegirdle
- Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, CHE205, Tampa, FL 33620, USA
| | - Stine S. H. Olsen
- Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, CHE205, Tampa, FL 33620, USA
| | - Michael N. Teng
- Department of Internal Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Kim C. Tran
- Department of Internal Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Charles D. Amsler
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd, Birmingham, AL 35233, USA
| | - James B. McClintock
- Department of Biology, University of Alabama at Birmingham, 1300 University Blvd, Birmingham, AL 35233, USA
| | - Bill J. Baker
- Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, CHE205, Tampa, FL 33620, USA
- Correspondence: ; Tel.: +1-(813)-974-1967
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3
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Riccio G, Nuzzo G, Zazo G, Coppola D, Senese G, Romano L, Costantini M, Ruocco N, Bertolino M, Fontana A, Ianora A, Verde C, Giordano D, Lauritano C. Bioactivity Screening of Antarctic Sponges Reveals Anticancer Activity and Potential Cell Death via Ferroptosis by Mycalols. Mar Drugs 2021; 19:459. [PMID: 34436298 PMCID: PMC8400861 DOI: 10.3390/md19080459] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/03/2021] [Accepted: 08/10/2021] [Indexed: 01/05/2023] Open
Abstract
Sponges are known to produce a series of compounds with bioactivities useful for human health. This study was conducted on four sponges collected in the framework of the XXXIV Italian National Antarctic Research Program (PNRA) in November-December 2018, i.e., Mycale (Oxymycale) acerata, Haliclona (Rhizoniera) dancoi, Hemimycale topsenti, and Hemigellius pilosus. Sponge extracts were fractioned and tested against hepatocellular carcinoma (HepG2), lung carcinoma (A549), and melanoma cells (A2058), in order to screen for antiproliferative or cytotoxic activity. Two different chemical classes of compounds, belonging to mycalols and suberitenones, were identified in the active fractions. Mycalols were the most active compounds, and their mechanism of action was also investigated at the gene and protein levels in HepG2 cells. Of the differentially expressed genes, ULK1 and GALNT5 were the most down-regulated genes, while MAPK8 was one of the most up-regulated genes. These genes were previously associated with ferroptosis, a programmed cell death triggered by iron-dependent lipid peroxidation, confirmed at the protein level by the down-regulation of GPX4, a key regulator of ferroptosis, and the up-regulation of NCOA4, involved in iron homeostasis. These data suggest, for the first time, that mycalols act by triggering ferroptosis in HepG2 cells.
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Affiliation(s)
- Gennaro Riccio
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
| | - Genoveffa Nuzzo
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli, Italy; (G.N.); (G.S.); (L.R.); (A.F.)
| | - Gianluca Zazo
- Research Infrastructure for Marine Biological Resources Department, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy;
| | - Daniela Coppola
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
| | - Giuseppina Senese
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli, Italy; (G.N.); (G.S.); (L.R.); (A.F.)
| | - Lucia Romano
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli, Italy; (G.N.); (G.S.); (L.R.); (A.F.)
| | - Maria Costantini
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
- Institute of Biosciences and BioResources (IBBR), National Research Council (CNR), Via Pietro Castellino 111, 80131 Napoli, Italy
| | - Nadia Ruocco
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
| | - Marco Bertolino
- Dipartimento di Scienze della Terra, dell’Ambiente e della Vita (DISTAV), Università degli Studi di Genova, Corso Europa 26, 16132 Genova, Italy;
| | - Angelo Fontana
- Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, 80078 Pozzuoli, Italy; (G.N.); (G.S.); (L.R.); (A.F.)
- Laboratory of Bio-Organic Chemistry and Chemical Biology, Department of Biology, Università di Napoli “Federico II”, Via Cupa Nuova Cinthia 21, 80126 Napoli, Italy
| | - Adrianna Ianora
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
| | - Cinzia Verde
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
- Institute of Biosciences and BioResources (IBBR), National Research Council (CNR), Via Pietro Castellino 111, 80131 Napoli, Italy
| | - Daniela Giordano
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
- Institute of Biosciences and BioResources (IBBR), National Research Council (CNR), Via Pietro Castellino 111, 80131 Napoli, Italy
| | - Chiara Lauritano
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; (G.R.); (D.C.); (M.C.); (N.R.); (A.I.); (C.V.); (D.G.)
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4
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Marine Terpenoids from Polar Latitudes and Their Potential Applications in Biotechnology. Mar Drugs 2020; 18:md18080401. [PMID: 32751369 PMCID: PMC7459527 DOI: 10.3390/md18080401] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/24/2020] [Accepted: 07/25/2020] [Indexed: 01/03/2023] Open
Abstract
Polar marine biota have adapted to thrive under one of the ocean’s most inhospitable scenarios, where extremes of temperature, light photoperiod and ice disturbance, along with ecological interactions, have selected species with a unique suite of secondary metabolites. Organisms of Arctic and Antarctic oceans are prolific sources of natural products, exhibiting wide structural diversity and remarkable bioactivities for human applications. Chemical skeletons belonging to terpene families are the most commonly found compounds, whereas cytotoxic antimicrobial properties, the capacity to prevent infections, are the most widely reported activities from these environments. This review firstly summarizes the regulations on access and benefit sharing requirements for research in polar environments. Then it provides an overview of the natural product arsenal from Antarctic and Arctic marine organisms that displays promising uses for fighting human disease. Microbes, such as bacteria and fungi, and macroorganisms, such as sponges, macroalgae, ascidians, corals, bryozoans, echinoderms and mollusks, are the main focus of this review. The biological origin, the structure of terpenes and terpenoids, derivatives and their biotechnological potential are described. This survey aims to highlight the chemical diversity of marine polar life and the versatility of this group of biomolecules, in an effort to encourage further research in drug discovery.
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6
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Núñez-Pons L, Avila C. Natural products mediating ecological interactions in Antarctic benthic communities: a mini-review of the known molecules. Nat Prod Rep 2015; 32:1114-30. [PMID: 25693047 DOI: 10.1039/c4np00150h] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Out of the many bioactive compounds described from the oceans, only a small fraction have been studied for their ecological significance. Similarly, most chemically mediated interactions are not well understood, because the molecules involved remain unrevealed. In Antarctica, this gap in knowledge is even more acute in comparison to tropical or temperate regions, even though polar organisms are also prolific producers of chemical defenses, and pharmacologically relevant products are being reported from the Southern Ocean. The extreme and unique marine environments surrounding Antarctica along with the numerous unusual interactions taking place in benthic communities are expected to select for novel functional secondary metabolites. There is an urgent need to comprehend the evolutionary role of marine derived substances in general, and particularly at the Poles, since molecules of keystone significance are vital in species survival, and therefore, in structuring the communities. Here we provide a mini-review on the identified marine natural products proven to have an ecological function in Antarctic ecosystems. This report recapitulates some of the bibliography from original Antarctic reviews, and updates the new literature in the field from 2009 to the present.
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7
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Hubert JG, Furkert DP, Brimble MA. Preparation of cis-γ-Hydroxycarvone Derivatives for Synthesis of Sesterterpenoid Natural Products: Total Synthesis of Phorbin A. J Org Chem 2015; 80:2231-9. [DOI: 10.1021/jo502748s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jonathan G. Hubert
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Daniel. P. Furkert
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences and Maurice Wilkins Centre for Molecular
Biodiscovery, University of Auckland, 23 Symonds Street, Auckland 1142, New Zealand
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8
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Daoust J, Chen M, Wang M, Williams DE, Garcia Chavez MA, Wang YA, Merchant CE, Fontana A, Kieffer TJ, Andersen RJ. Sesterterpenoids isolated from a northeastern Pacific Phorbas sp. J Org Chem 2013; 78:8267-73. [PMID: 23941043 DOI: 10.1021/jo4014589] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Four new sesterterpenoids, ansellone B (4), phorbadione (5), secoepoxyansellone A (6), and alotaketal C (7), have been isolated from specimens of the sponge Phorbas sp. collected in British Columbia. Ansellone B (4) has an unprecedented heterocyclic skeleton featuring an oxocane ring, and secoepoxyansellone A (6) is the first example of the degraded "secoansellane" sesterterpenoid carbon skeleton. Alotaketal C (7) is an activator of cAMP signaling in HEK cells.
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Affiliation(s)
- Julie Daoust
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
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9
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McClintock JB, Amsler CD, Baker BJ. Overview of the chemical ecology of benthic marine invertebrates along the western Antarctic peninsula. Integr Comp Biol 2010; 50:967-80. [PMID: 21558253 DOI: 10.1093/icb/icq035] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Thirteen years ago in a review that appeared in the American Zoologist, we presented the first survey of the chemical and ecological bioactivity of Antarctic shallow-water marine invertebrates. In essence, we reported that despite theoretical predictions to the contrary the incidence of chemical defenses among sessile and sluggish Antarctic marine invertebrates was widespread. Since that time we and others have significantly expanded upon the base of knowledge of Antarctic marine invertebrates' chemical ecology, both from the perspective of examining marine invertebrates in new, distinct geographic provinces, as well as broadening the evaluation of the ecological significance of secondary metabolites. Importantly, many of these studies have been framed within established theoretical constructs, particularly the Optimal Defense Theory. In the present article, we review the current knowledge of chemical ecology of benthic marine invertebrates comprising communities along the Western Antarctic Peninsula (WAP), a region of Antarctica that is both physically and biologically distinct from the rest of the continent. Our overview indicates that, similar to other regions of Antarctica, anti-predator chemical defenses are widespread among species occurring along the WAP. In some groups, such as the sponges, the incidence of chemical defenses against predation is comparable to, or even slightly higher than, that found in tropical marine systems. While there is substantial knowledge of the chemical defenses of benthic marine invertebrates against predators, much less is known about chemical anti-foulants. The sole survey conducted to date suggests that secondary metabolites in benthic sponges are likely to be important in the prevention of fouling by benthic diatoms, yet generally lack activity against marine bacteria. Our understanding of the sensory ecology of Antarctic benthic marine invertebrates, despite its great potential, remains in its infancy. For example, along the WAP, community-level non-consumptive effects occur when amphipods chemically sense fish predators and respond by seeking refuge in chemically-defended macroalgae. Such interactions may be important in releasing amphipods from predation pressure and facilitating their unusually high abundances along the WAP. Moreover, recent studies on the sensory biology of the Antarctic keystone sea star Odontaster validus indicate that chemotactile-mediated interactions between conspecifics and other sympatric predatory sea stars may have significant ramifications in structuring community dynamics. Finally, from a global environmental perspective, understanding how chemical ecology structures marine benthic communities along the WAP must increasingly be viewed in the context of the dramatic impacts of rapid climatic change now occurring in this biogeographic region.
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Affiliation(s)
- James B McClintock
- Department of Biology, University of Alabama, Birmingham, AL 35294, USA.
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10
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Larghi EL, Bohn ML, Kaufman TS. Aaptamine and related products. Their isolation, chemical syntheses, and biological activity. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.03.027] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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11
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Affiliation(s)
- Shang-Gao Liao
- State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, P. R. China
| | - Hua-Dong Chen
- State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, P. R. China
| | - Jian-Min Yue
- State Key Laboratory of Drug Research, Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, P. R. China
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12
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Abstract
Marine natural products isolated from organisms collected from cold-water habitats are described. Emphasis is on bioactive compounds from tunicates, sponges, microbes, bryozoans, corals, algae, molluscs and echinoderms. Synthetic studies of several important classes of cold-water compounds are highlighted.
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Affiliation(s)
- Matthew D Lebar
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, CHE205, Tampa, FL, USA
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13
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Erpenbeck D, Breeuwer JAJ, Parra-Velandia FJ, van Soest RWM. Speculation with spiculation?—Three independent gene fragments and biochemical characters versus morphology in demosponge higher classification. Mol Phylogenet Evol 2006; 38:293-305. [PMID: 16325431 DOI: 10.1016/j.ympev.2005.11.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Revised: 09/22/2005] [Accepted: 10/04/2005] [Indexed: 11/28/2022]
Abstract
Demosponge higher-level systematics is currently a subject of major changes due to the simplicity and paucity of complex morphological characters. Still, sponge classification is primarily based on morphological features. The systematics of the demosponge order Agelasida has been exceptionally problematic in the past. Here, we present the first molecular phylogenetic analysis based on three partially independent genes in demosponges in combination with a comprehensive search for biochemical synapomorphies to indicate their phylogenetic relationships. We show how sponges with fundamentally different skeletons can be in fact closely related and discuss examples of the misleading nature of morphological systematics in sponges.
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Affiliation(s)
- D Erpenbeck
- IBED, University of Amsterdam, P.O. Box 94766, 1090GT Amsterdam, The Netherlands.
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14
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Erpenbeck D, van Soest RW. A survey for biochemical synapomorphies to reveal phylogenetic relationships of halichondrid demosponges (Metazoa: Porifera). BIOCHEM SYST ECOL 2005. [DOI: 10.1016/j.bse.2004.12.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Jang KH, Lee BH, Choi BW, Lee HS, Shin J. Chromenes from the brown alga Sargassum siliquastrum. JOURNAL OF NATURAL PRODUCTS 2005; 68:716-23. [PMID: 15921416 DOI: 10.1021/np058003i] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Sargachromanols A-P (1-16), sixteen new meroterpenoids of the chromene class, were isolated from the brown alga Sargassum siliquastrum collected from Jaeju Island, Korea. On the basis of the combined results of spectral and chemical analyses, the structures of the polyprenyl portions of these chromanol-containing compounds were determined to be linear triprenyls (1 and 2) and tetraprenyls (3-11), while others were the corresponding rearranged (12-15) and cyclized (16) tetraprenyls, respectively. The new compounds exhibited significant antioxidant activity in the DPPH assay. Compounds 7 and 15 also showed inhibitory activity toward butylcholine esterase.
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Affiliation(s)
- Kyoung Hwa Jang
- Natural Products Research Institute, College of Pharmacy, Seoul National University, #28 Yungun, Jongro, Seoul 110-460, Korea
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16
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Bioactive marine sesterterpenoids. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1572-5995(05)80055-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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17
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Dı́az-Marrero AR, Brito I, Cueto M, San-Martı́n A, Darias J. Suberitane network, a taxonomical marker for Antarctic sponges of the genus Suberites ? Novel sesterterpenes from Suberites caminatus. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.04.091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Lee HS, Ahn JW, Lee YH, Rho JR, Shin J. New sesterterpenes from the Antarctic sponge Suberites sp. JOURNAL OF NATURAL PRODUCTS 2004; 67:672-674. [PMID: 15104501 DOI: 10.1021/np030342t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Suberitenones C and D and suberiphenol, three new sesterterpenes of the suberitane class, were isolated from the sponge Suberites sp. collected from Antarctica. The structures of these compounds were determined on the basis of combined spectral and chemical analyses.
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Affiliation(s)
- Hyi-Seung Lee
- Marine Natural Products Laboratory, Korea Ocean Research & Development Institute, Ansan P.O. Box 29, Seoul 425-600, Korea
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19
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Abstract
An enantioselective, stereocontrolled total synthesis of eunicenone A (1) is described starting from geranylgeranylacetylene (9) in 14 steps via intermediates 10-20. The most critical construction in the synthesis is the highly effective Diels-Alder combination of the achiral components 2-bromoacrolein and diene 13 in the presence of the chiral Lewis acid catalyst 14 to form 15 (85% yield, 97% ee, >98:2 endo-exo ratio). The synthesis utilizes a novel reagent (12) for introduction of silicon, which serves to activate and direct the diene 13 for Diels-Alder reaction and to provide for eventual oxygen functionality of homoallylic alcohol 17 under mild conditions. Other noteworthy steps include the position selective and diastereoselective epoxidation 17 --> 18, the methoxycarbonylation with allylic transposition 19 --> 20, and the alpha,beta-enone unmasking 20 --> 1.
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Affiliation(s)
- T W Lee
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
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20
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Amsler CD, McClintock JB, Baker BJ. Secondary Metabolites as Mediators of Trophic Interactions Among Antarctic Marine Organisms1. ACTA ACUST UNITED AC 2001. [DOI: 10.1668/0003-1569(2001)041[0017:smamot]2.0.co;2] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Avila C, Iken K, Fontana A, Cimino G. Chemical ecology of the Antarctic nudibranch Bathydoris hodgsoni Eliot, 1907: defensive role and origin of its natural products. JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY 2000; 252:27-44. [PMID: 10962063 DOI: 10.1016/s0022-0981(00)00227-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A variety of Antarctic marine invertebrates contains secondary metabolites that may provide defense against potential predators. However, only in a few cases have tissues, extracts or isolated compounds of these invertebrates been tested against sympatric predators. The Antarctic nudibranch Bathydoris hodgsoni Eliot, 1907 contains hodgsonal, a compound only present in the external body (mantle tissues), which may protect the slugs from predators. To test this defensive hypothesis for hodgsonal, we carried out a series of experiments using the sympatric omnivorous seastar Odontaster validus Koehler, 1906 as a potential predator. Our experiments revealed that natural concentrations of hodgsonal elicit significant feeding deterrent responses in O. validus. Furthermore, hodgsonal is probably biosynthesized de novo by the nudibranch, since it was not detected in the viscera (as it should be in the case of a dietary compound), its concentration in the mantle (0.05-0.15% dry mass) is quite constant in individuals from different localities and depths, and its sequestration from a particular dietary source is unlikely because B. hodgsoni is an omnivorous feeder.
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Affiliation(s)
- C Avila
- Centre d'Estudis Avançats de Blanes (C.E.A.B.-C.S.I.C.), Camí de Sta. Bàrbara s/n, 17300 Blanes, Girona, Spain
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Moon B, Baker BJ, McClintock JB. Purine and nucleoside metabolites from the Antarctic sponge Isodictya erinacea. JOURNAL OF NATURAL PRODUCTS 1998; 61:116-118. [PMID: 9461659 DOI: 10.1021/np970358h] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The bright yellow sponge Isodictya erinacea is one of several chemically defended sponges found on the benthos of McMurdo Sound, Antarctica. An investigation of the metabolites from this sponge has resulted in the isolation of purine and nucleoside metabolites, including the previously unreported erinacean (1) and p-hydroxybenzaldehyde. The latter metabolite has been demonstrated to cause a feeding deterrence behavior in Perknaster fuscus, the major predator of antarctic sponges.
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Affiliation(s)
- B Moon
- Department of Chemistry, Florida Institute of Technology, Melbourne 32901, USA
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Seo Y, Cho KW, Rho JR, Shin J, Sim CJ. Petrocortynes and petrosiacetylenes, novel polyacetylenes from a sponge of the genus Petrosia. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(97)10290-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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