1
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Yamamoto D, Matsukawa D, Kikuchi R, Narushima Y, Kumakura Y, Ito M, Makino K. Manganese-Catalyzed 5- Endo-trig Oxygenative Cyclization of α,β-Unsaturated Oximes under Air and Ambient Conditions for the Synthesis of 4,5-Dihydroisoxazoles. J Org Chem 2024; 89:6377-6388. [PMID: 38634731 DOI: 10.1021/acs.joc.4c00390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
The stereoselective 5-endo-trig oxygenative cyclization of α,β-unsaturated oximes was achieved using molecular oxygen (O2) and a manganese catalyst. Several 4-hydroxy-4,5-dihydroisoxazoles were obtained in high yields by directly incorporating O2 from the atmosphere (eliminating the necessity for a pure oxygen environment) and using an unprecedentedly low loading of Mn(acac)3 (as little as 0.020 mol %) without additional additives. Because of its desirable features, such as operational simplicity, inexpensive catalyst, mild reaction conditions (open flask conditions at room temperature), and broad substrate compatibility, this novel reaction provides an attractive synthetic approach to producing 4-hydroxy-4,5-dihydroisoxazoles.
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Affiliation(s)
- Daisuke Yamamoto
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences, Kitasato University, Tokyo 108-8641, Japan
| | - Daisuke Matsukawa
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences, Kitasato University, Tokyo 108-8641, Japan
| | - Ryusei Kikuchi
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences, Kitasato University, Tokyo 108-8641, Japan
| | - Yuki Narushima
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences, Kitasato University, Tokyo 108-8641, Japan
| | - Yuta Kumakura
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences, Kitasato University, Tokyo 108-8641, Japan
| | - Mana Ito
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences, Kitasato University, Tokyo 108-8641, Japan
| | - Kazuishi Makino
- Laboratory of Organic Chemistry for Drug Development and Medical Research Laboratories, Department of Pharmaceutical Sciences, Kitasato University, Tokyo 108-8641, Japan
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2
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Gribble GW. Naturally Occurring Organohalogen Compounds-A Comprehensive Review. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 121:1-546. [PMID: 37488466 DOI: 10.1007/978-3-031-26629-4_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number-from fewer than 25 in 1968-to approximately 8000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA.
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3
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Mauduit M, Greff S, Herbette G, Naubron JV, Chentouf S, Huy Ngo T, Nam JW, Molinari S, Mabrouki F, Garayev E, Baghdikian B, Pérez T, Simmler C. Diving into the Molecular Diversity of Aplysina cavernicola's Exometabolites: Contribution of Bromo-Spiroisoxazoline Alkaloids. ACS OMEGA 2022; 7:43068-43083. [PMID: 36467926 PMCID: PMC9713894 DOI: 10.1021/acsomega.2c05415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/26/2022] [Indexed: 06/17/2023]
Abstract
Sponges are prolific producers of specialized metabolites with unique structural scaffolds. Their chemical diversity has always inspired natural product chemists working in drug discovery. As part of their metabolic filter-feeding activities, sponges are known to release molecules, possibly including their specialized metabolites. These released "Exo-Metabolites" (EMs) may be considered as new chemical reservoirs that could be collected from the water column while preserving marine biodiversity. The present work aims to determine the proportion and diversity of specialized EMs released by the sponge Aplysina cavernicola (Vacelet 1959). This Mediterranean sponge produces bromo-spiroisoxazoline alkaloids that are widely distributed in the Aplysinidae family. Aquarium experiments were designed to facilitate a continuous concentration of dissolved and diluted metabolites from the seawater around the sponges. Mass Spectrometry (MS)-based metabolomics combined with a dereplication pipeline were performed to investigate the proportion and identity of brominated alkaloids released as EMs. Chemometric analysis revealed that brominated features represented 12% of the total sponge's EM features. Consequently, a total of 13 bromotyrosine alkaloids were reproducibly detected as EMs. The most abundant ones were aerothionin, purealidin L, aerophobin 1, and a new structural congener, herein named aplysine 1. Their structural identity was confirmed by NMR analyses following their isolation. MS-based quantification indicated that these major brominated EMs represented up to 1.0 ± 0.3% w/w of the concentrated seawater extract. This analytical workflow and collected results will serve as a stepping stone to characterize the composition of A. cavernicola's EMs and those released by other sponges through in situ experiments, leading to further evaluate the biological properties of such EMs.
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Affiliation(s)
- Morgane Mauduit
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Endoume Marine Station, Chemin de la batterie des lions, 13007 Marseille, France
| | - Stéphane Greff
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Endoume Marine Station, Chemin de la batterie des lions, 13007 Marseille, France
| | - Gaëtan Herbette
- Aix
Marseille Université, CNRS, Centrale Marseille, FSCM-Spectropole,Service 511, Campus Saint-Jérome, 13397 Marseille, France
| | - Jean-Valère Naubron
- Aix
Marseille Université, CNRS, Centrale Marseille, FSCM-Spectropole,Service 511, Campus Saint-Jérome, 13397 Marseille, France
| | - Sara Chentouf
- Aix
Marseille Université, CNRS, Centrale Marseille, FSCM-Spectropole,Service 511, Campus Saint-Jérome, 13397 Marseille, France
| | - Trung Huy Ngo
- College
of Pharmacy, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do 38541, South Korea
| | - Joo-Won Nam
- College
of Pharmacy, Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do 38541, South Korea
| | - Sacha Molinari
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Endoume Marine Station, Chemin de la batterie des lions, 13007 Marseille, France
| | - Fathi Mabrouki
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, Cedex 5, France
| | - Elnur Garayev
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, Cedex 5, France
| | - Béatrice Baghdikian
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Faculté de Pharmacie, 27 Boulevard Jean Moulin, 13385 Marseille, Cedex 5, France
| | - Thierry Pérez
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Endoume Marine Station, Chemin de la batterie des lions, 13007 Marseille, France
| | - Charlotte Simmler
- IMBE,
UMR CNRS 7263, IRD 237, Aix Marseille Université, Avignon Université,
Endoume Marine Station, Chemin de la batterie des lions, 13007 Marseille, France
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4
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Youssef DTA, Shaala LA. Psammaplysins: Insights from Natural Sources, Structural Variations, and Pharmacological Properties. Mar Drugs 2022; 20:663. [PMID: 36354986 PMCID: PMC9693029 DOI: 10.3390/md20110663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 10/21/2022] [Accepted: 10/22/2022] [Indexed: 04/08/2024] Open
Abstract
Marine natural products (MNPs) continue to be in the spotlight in the global drug discovery endeavor. Currently, more than 32,000 structurally diverse secondary metabolites from marine sources have been isolated, making MNPs a vital source for researchers to look for novel drug candidates. The marine-derived psammaplysins possess the rare and unique 1,6-dioxa-2-azaspiro [4.6] undecane backbone and are represented by 44 compounds in the literature, mostly from sponges of the order Verongiida. Compounds with 1,6-dioxa-2-azaspiro [4.6] undecane moiety exist in the literature under five names, including psammaplysins, ceratinamides, frondoplysins, ceratinadins, and psammaceratins. These compounds displayed significant biological properties including growth inhibitory, antimalarial, antifouling, protein tyrosine phosphatase inhibition, antiviral, immunosuppressive, and antioxidant effects. In this review, a comprehensive literature survey covering natural occurrence of the psammaplysins and related compounds, methods of isolation, structural differences, the biogenesis, and biological/pharmacological properties, will be presented.
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Affiliation(s)
- Diaa T. A. Youssef
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Natural Products Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Lamiaa A. Shaala
- Natural Products Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Suez Canal University Hospital, Suez Canal University, Ismailia 41522, Egypt
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5
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Lever J, Kreuder F, Henry J, Hung A, Allard PM, Brkljača R, Rix C, Taki AC, Gasser RB, Kaslin J, Wlodkowic D, Wolfender JL, Urban S. Targeted Isolation of Antibiotic Brominated Alkaloids from the Marine Sponge Pseudoceratina durissima Using Virtual Screening and Molecular Networking. Mar Drugs 2022; 20:md20090554. [PMID: 36135743 PMCID: PMC9503778 DOI: 10.3390/md20090554] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 11/23/2022] Open
Abstract
Many targeted natural product isolation approaches rely on the use of pre-existing bioactivity information to inform the strategy used for the isolation of new bioactive compounds. Bioactivity information can be available either in the form of prior assay data or via Structure Activity Relationship (SAR) information which can indicate a potential chemotype that exhibits a desired bioactivity. The work described herein utilizes a unique method of targeted isolation using structure-based virtual screening to identify potential antibacterial compounds active against MRSA within the marine sponge order Verongiida. This is coupled with molecular networking-guided, targeted isolation to provide a novel drug discovery procedure. A total of 12 previously reported bromotyrosine-derived alkaloids were isolated from the marine sponge species Pseudoceratina durissima, and the compound, (+)-aeroplysinin-1 (1) displayed activity against the MRSA pathogen (MIC: <32 µg/mL). The compounds (1−3, 6 and 9) were assessed for their central nervous system (CNS) interaction and behavioral toxicity to zebrafish (Danio rerio) larvae, whereby several of the compounds were shown to induce significant hyperactivity. Anthelmintic activity against the parasitic nematode Haemonchus contorutus was also evaluated (2−4, 6−8).
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Affiliation(s)
- James Lever
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
| | - Florian Kreuder
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Jason Henry
- Neurotoxicology Lab., School of Science (Biosciences), RMIT University, Bundoora, VIC 3083, Australia
| | - Andrew Hung
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
| | | | - Robert Brkljača
- Monash Biomedical Imaging, Monash University, Clayton, VIC 3168, Australia
| | - Colin Rix
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
| | - Aya C. Taki
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agriculture Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Robin B. Gasser
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agriculture Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Jan Kaslin
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC 3800, Australia
| | - Donald Wlodkowic
- Neurotoxicology Lab., School of Science (Biosciences), RMIT University, Bundoora, VIC 3083, Australia
| | - Jean-Luc Wolfender
- School of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU, Rue Michel-Servet 1, 1211 Geneva, Switzerland
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU, 1211 Geneva, Switzerland
| | - Sylvia Urban
- School of Science (Applied Chemistry and Environmental Sciences), RMIT University, GPO Box 2476 Melbourne, VIC 3001, Australia
- Correspondence:
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6
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Holman SDL, Wills AG, Fazakerley NJ, Poole DL, Coe DM, Berlouis LA, Reid M. Electrochemical Synthesis of Isoxazolines: Method and Mechanism. Chemistry 2022; 28:e202103728. [PMID: 35076117 PMCID: PMC9303936 DOI: 10.1002/chem.202103728] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Indexed: 11/11/2022]
Abstract
An electrochemical method for the green and practical synthesis of a broad range of substituted isoxazoline cores is presented. Both aryl and more challenging alkyl aldoximes are converted to the desired isoxazoline in an electrochemically enabled regio‐ and diastereoselective reaction with electron‐deficient alkenes. Additionally, in‐situ reaction monitoring methods compatible with electrochemistry equipment have been developed in order to probe the reaction pathway. Supporting analyses from kinetic (time‐course) modelling and density functional theory support a stepwise, radical‐mediated mechanism, and discounts hypothesised involvement of closed shell [3+2] cycloaddition pathways.
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Affiliation(s)
- Samuel D. L. Holman
- WestCHEM Department of Pure and Applied Chemistry University of Strathclyde Royal College Building 204 George Street Glasgow G1 1XW UK
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage SG1 2NY UK
| | - Alfie G. Wills
- WestCHEM Department of Pure and Applied Chemistry University of Strathclyde Royal College Building 204 George Street Glasgow G1 1XW UK
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage SG1 2NY UK
| | - Neal J. Fazakerley
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage SG1 2NY UK
| | - Darren L. Poole
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage SG1 2NY UK
| | - Diane M. Coe
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage SG1 2NY UK
| | - Leonard A. Berlouis
- WestCHEM Department of Pure and Applied Chemistry University of Strathclyde Royal College Building 204 George Street Glasgow G1 1XW UK
| | - Marc Reid
- WestCHEM Department of Pure and Applied Chemistry University of Strathclyde Royal College Building 204 George Street Glasgow G1 1XW UK
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7
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Endoori S, Gulipalli KC, Bodige S, Shaikh AS, Vemula D, Surapureddi SR, Seelam N. Design, synthesis, anti-cancer activity and in-silico studies of some novel 4,5-dihydroisoxazole-5-carboxamide derivatives. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1974041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Srinivas Endoori
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Guntur, India
| | | | - Srinu Bodige
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Guntur, India
| | - Arbaz Sujat Shaikh
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | - Divya Vemula
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, Telangana, India
| | | | - Nareshvarma Seelam
- Department of Chemistry, Koneru Lakshmaiah Education Foundation, Guntur, India
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8
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Yavari MA, Adiloglu Y, Saglamtas R, Tutar A, Gulcin I, Menzek A. Synthesis and some enzyme inhibition effects of isoxazoline and pyrazoline derivatives including benzonorbornene unit. J Biochem Mol Toxicol 2021; 36:e22952. [PMID: 34783117 DOI: 10.1002/jbt.22952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 09/27/2021] [Accepted: 11/01/2021] [Indexed: 12/22/2022]
Abstract
Four new and four known isoxazoline derivatives were synthesized from the reactions of benzonorbornadiene with nitrile oxides formed from the corresponding benzaldehydes. Three new and one known pyrazoline derivatives were also synthesized from the reactions of the benzonorbornadiene with nitrile imines formed from the corresponding compounds. The synthesized nitrogen-based novel heterocyclic compounds were evaluated against the human carbonic anhydrase isoenzymes I and II (hCA I and hCA II), acetylcholinesterase (AChE), and butyrylcholinesterase (BChE) enzymes. The synthesized nitrogen-based novel heterocyclic compounds showed IC50 values in the range of 2.69-7.01 against hCA I, 2.40-4.59 against hCA II, 0.81-1.32 µM against AChE, and 20.83-1.70 µM against BChE enzymes. On the contrary, nitrogen-based novel heterocyclic compounds demonstrated Ki values between 2.93 ± 0.59-8.61 ± 1.39 against hCA I, 2.05 ± 0.62-4.97 ± 0.95 against hCA II, 0.34 ± 0.02-0.92 ± 0.17 nM against AChE, and 0.50 ± 0.04-1.20 ± 0.16 µM against BChE enzymes. The synthesized nitrogen-based novel heterocyclic compounds exhibited effective inhibition profiles against both indicated metabolic enzymes. These results may contribute to the development of new drugs particularly to treat some disorders, which are widespread in the world including glaucoma and Alzheimer's diseases.
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Affiliation(s)
- Mirali A Yavari
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Yadigar Adiloglu
- Department of Chemistry, Faculty of Science, Sakarya University, Sakarya, Turkey
| | - Ruya Saglamtas
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, Turkey
| | - Ahmet Tutar
- Department of Chemistry, Faculty of Science, Sakarya University, Sakarya, Turkey
| | - Ilhami Gulcin
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Abdullah Menzek
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
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9
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Chen D, He T, Jin Y, Huang S. Electrooxidative Dearomatization to Spiroisoxazolines: Application to Total Synthesis of Xanthoisoxazoline B. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Dengfeng Chen
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 People's Republic of China
- International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Tianyu He
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Yongcan Jin
- International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Shenlin Huang
- Jiangsu Co–Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials Nanjing Forestry University Nanjing 210037 People's Republic of China
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10
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Galitz A, Nakao Y, Schupp PJ, Wörheide G, Erpenbeck D. A Soft Spot for Chemistry-Current Taxonomic and Evolutionary Implications of Sponge Secondary Metabolite Distribution. Mar Drugs 2021; 19:448. [PMID: 34436287 PMCID: PMC8398655 DOI: 10.3390/md19080448] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/23/2021] [Accepted: 07/27/2021] [Indexed: 12/17/2022] Open
Abstract
Marine sponges are the most prolific marine sources for discovery of novel bioactive compounds. Sponge secondary metabolites are sought-after for their potential in pharmaceutical applications, and in the past, they were also used as taxonomic markers alongside the difficult and homoplasy-prone sponge morphology for species delineation (chemotaxonomy). The understanding of phylogenetic distribution and distinctiveness of metabolites to sponge lineages is pivotal to reveal pathways and evolution of compound production in sponges. This benefits the discovery rate and yield of bioprospecting for novel marine natural products by identifying lineages with high potential of being new sources of valuable sponge compounds. In this review, we summarize the current biochemical data on sponges and compare the metabolite distribution against a sponge phylogeny. We assess compound specificity to lineages, potential convergences, and suitability as diagnostic phylogenetic markers. Our study finds compound distribution corroborating current (molecular) phylogenetic hypotheses, which include yet unaccepted polyphyly of several demosponge orders and families. Likewise, several compounds and compound groups display a high degree of lineage specificity, which suggests homologous biosynthetic pathways among their taxa, which identifies yet unstudied species of this lineage as promising bioprospecting targets.
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Affiliation(s)
- Adrian Galitz
- Department of Earth and Environmental Sciences, Palaeontology & Geobiology, Ludwig-Maximilians-Universität München, 80333 Munich, Germany; (A.G.); (G.W.)
| | - Yoichi Nakao
- Graduate School of Advanced Science and Engineering, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan;
| | - Peter J. Schupp
- Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl-von-Ossietzky University Oldenburg, 26111 Wilhelmshaven, Germany;
- Helmholtz Institute for Functional Marine Biodiversity, University of Oldenburg (HIFMB), 26129 Oldenburg, Germany
| | - Gert Wörheide
- Department of Earth and Environmental Sciences, Palaeontology & Geobiology, Ludwig-Maximilians-Universität München, 80333 Munich, Germany; (A.G.); (G.W.)
- GeoBio-Center, Ludwig-Maximilians-Universität München, 80333 Munich, Germany
- SNSB-Bavarian State Collection of Palaeontology and Geology, 80333 Munich, Germany
| | - Dirk Erpenbeck
- Department of Earth and Environmental Sciences, Palaeontology & Geobiology, Ludwig-Maximilians-Universität München, 80333 Munich, Germany; (A.G.); (G.W.)
- GeoBio-Center, Ludwig-Maximilians-Universität München, 80333 Munich, Germany
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11
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Youssef DTA, Asfour HZ, Shaala LA. Psammaceratin A: A Cytotoxic Psammaplysin Dimer Featuring an Unprecedented (2Z,3Z)-2,3-Bis(aminomethylene)succinamide Backbone from the Red Sea Sponge Pseudoceratina arabica. Mar Drugs 2021; 19:433. [PMID: 34436272 PMCID: PMC8399316 DOI: 10.3390/md19080433] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 07/23/2021] [Accepted: 07/28/2021] [Indexed: 11/23/2022] Open
Abstract
Bioassay-guided partition of the extract of the Red Sea sponge Pseudoceratina arabica and HPLC purification of the active fraction gave a psammaplysin dimer, psammaceratin A (1), along with psammaplysin A (2). The dimer comprises two units of psammaplysin A (2) connected via the terminal amines with an unprecedented (2Z,3Z)-2,3-bis(aminomethylene)succinamide moiety, and it represents the first dimer to be identified among the psammaplysin family. Data from 1D- and 2D-NMR and HRMS supported the chemical structures of the compounds. Psammaceratin A (1) and psammaplysin A (2) exhibited significant growth inhibition of HCT 116, HeLa, and MBA-MB-231 cells down to 3.1 μM.
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Affiliation(s)
- Diaa T. A. Youssef
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hani Z. Asfour
- Department of Medical Parasitology, Faculty of Medicine, Princess Al-Jawhara Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Lamiaa A. Shaala
- Natural Products Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Suez Canal University Hospital, Suez Canal University, Ismailia 41522, Egypt
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12
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Discovery of cytotoxic natural products from Red Sea sponges: Structure and synthesis. Eur J Med Chem 2021; 220:113491. [PMID: 33940466 DOI: 10.1016/j.ejmech.2021.113491] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 04/15/2021] [Accepted: 04/15/2021] [Indexed: 12/18/2022]
Abstract
Marine ecosystem continues to produce a great wealth of molecules endowed with cytotoxic activity towards a large panel of tumor cells. Marine sponges, apparently defenseless organisms are endowed through evolution with a range of cytotoxic metabolites for self protection against predators and space competition. Interestingly, high biodiversity of sponges with Demospongiae and Calcarea species that have yielded numerous bioactive compounds have been accorded in different regions of the Red Sea. This review for the first time provides a comprehensive overview of 123 cytotoxic agents derived from Red Sea sponges with diverse chemical structures covered till mid 2020 showing activities ranging from mildly active to very active against different panels of cancer cell lines. It has been divided according to the different classes of compounds including alkaloids, terpenoids (sesquiterpenes, diterpenes, triterpenes, sesterterpenes, norsesterterpenes), peptides and macrolides, lipids (steroids, fatty acids/amides and glycerides) etc. The enhancement in the cytotoxicity with respect to the molecular structure changes have been described in detail. We have also accounted for the total synthesis of cytotoxic molecules, subereamolline A, aerothionin, asmarine B, norrsolide and latrunculin B showing interesting activity against different cancer cell lines.
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Muzychka L, Voronkina A, Kovalchuk V, Smolii OB, Wysokowski M, Petrenko I, Youssef DTA, Ehrlich I, Ehrlich H. Marine biomimetics: bromotyrosines loaded chitinous skeleton as source of antibacterial agents. APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING 2021; 127:15. [PMID: 33424135 PMCID: PMC7776313 DOI: 10.1007/s00339-020-04167-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 11/23/2020] [Indexed: 05/10/2023]
Abstract
UNLABELLED The marine sponges of the order Verongiida (Demospongiae: Porifera) have survived on our planet for more than 500 million years due to the presence of a unique strategy of chemical protection by biosynthesis of more than 300 derivatives of biologically active bromotyrosines as secondary metabolites. These compounds are synthesized within spherulocytes, highly specialized cells located within chitinous skeletal fibers of these sponges from where they can be extruded in the sea water and form protective space against pathogenic viruses, bacteria and other predators. This chitin is an example of unique biomaterial as source of substances with antibiotic properties. Traditionally, the attention of researchers was exclusively drawn to lipophilic bromotyrosines, the extraction methods of which were based on the use of organic solvents only. Alternatively, we have used in this work a biomimetic water-based approach, because in natural conditions, sponges actively extrude bromotyrosines that are miscible with the watery environment. This allowed us to isolate 3,5-dibromoquinolacetic acid from an aqueous extract of the dried demosponge Aplysina aerophoba and compare its antimicrobial activity with the same compound obtained by the chemical synthesis. Both synthetic and natural compounds have shown antimicrobial properties against clinical strains of Staphylococcus aureus, Enterococcus faecalis and Propionibacterium acnes. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s00339-020-04167-0.
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Affiliation(s)
- Liubov Muzychka
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Murmanska Str. 1, Kiev, 02094 Ukraine
| | - Alona Voronkina
- Department of Pharmacy, National Pirogov Memorial Medical University, Vinnytsya, Vinnytsia 21018 Ukraine
| | - Valentine Kovalchuk
- Department of Microbiology, National Pirogov Memorial Medical University, Vinnytsya, Vinnytsia 21018 Ukraine
| | - Oleg B. Smolii
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Murmanska Str. 1, Kiev, 02094 Ukraine
| | - Marcin Wysokowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, 60965 Poznan, Poland
- Institute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Gustav-Zeuner Str. 3, 09599 Freiberg, Germany
| | - Iaroslav Petrenko
- Institute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Gustav-Zeuner Str. 3, 09599 Freiberg, Germany
| | - Diaa T. A. Youssef
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah, 21589 Saudi Arabia
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia, 41522 Egypt
| | | | - Hermann Ehrlich
- Institute of Electronic and Sensor Materials, TU Bergakademie Freiberg, Gustav-Zeuner Str. 3, 09599 Freiberg, Germany
- Center for Advanced Technology, Adam Mickiewicz University, 61614 Poznan, Poland
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Kumar G, Shankar R. 2-Isoxazolines: A Synthetic and Medicinal Overview. ChemMedChem 2020; 16:430-447. [PMID: 33029886 DOI: 10.1002/cmdc.202000575] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/26/2020] [Indexed: 02/03/2023]
Abstract
Isoxazolines are nitrogen- and oxygen-containing five-membered heterocyclic scaffolds with extensive biological activities. This framework can be readily obtained in good to excellent yields through 1,3-dipolar cycloaddition between nitrones with alkynes or allenes, aryl/alkyl halides, alkynes, and oxaziridines under mild conditions. This scaffold has been an emerging area of interest for many researchers given their wide range of bioactivities. Herein we review synthetic strategies toward isoxazolines and the role these efforts have had in enhancing the biological activity of natural products and synthetic compounds such as antitubercular agents, COX-1 inhibitors, COX-2 inhibitors (e. g., valdecoxib), nicotinic receptor modulators, and MIF inhibitors. With a focus on efforts from 2010 onward, this review provides in-depth coverage of the design and biological evaluation of isoxazoline systems and their impact on various pathologies.
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Affiliation(s)
- Gulshan Kumar
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu Campus, Jammu, 180001, India.,Bio-organic Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu Campus, Jammu, 180001, India
| | - Ravi Shankar
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu Campus, Jammu, 180001, India.,Bio-organic Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu Campus, Jammu, 180001, India
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15
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Shaala LA, Youssef DTA. Pseudoceratonic Acid and Moloka'iamine Derivatives from the Red Sea Verongiid Sponge Pseudoceratina arabica. Mar Drugs 2020; 18:E525. [PMID: 33114230 PMCID: PMC7690883 DOI: 10.3390/md18110525] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/15/2020] [Accepted: 10/21/2020] [Indexed: 12/20/2022] Open
Abstract
During an investigation of the chemistry of the Red Sea Verongiid sponge Pseudoceratina arabica, we discovered a small molecule, pseudoceratonic acid (1), along with the new moloka'iamine derivatives, ceratinines N (2), O (3), and the previously reported compounds moloka'iamine (4), hydroxymoloka'iamine (5) and ceratinamine (6). The structural assignments of 1-6 were accomplished by interpretation of their NMR and HRESIMS spectral data. Pseudoceratonic acid possesses a dibrominated hydrazine-derived functional group not found in any reported chemical compound. Pseudoceratonic acid selectively inhibited the growth of E. coli and S. aureus, while ceratinine N selectively inhibited C. albicans. Further, ceratinine N showed potent cytotoxic effects against the triple-negative breast cancer, colorectal carcinoma, and human cervical carcinoma cell lines down to 2.1 µM.
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Affiliation(s)
- Lamiaa A. Shaala
- King Fahd Medical Research Center, Natural Products Unit, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Suez Canal University Hospital, Suez Canal University, Ismailia 41522, Egypt
| | - Diaa T. A. Youssef
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
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16
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El-Hossary EM, Abdel-Halim M, Ibrahim ES, Pimentel-Elardo SM, Nodwell JR, Handoussa H, Abdelwahab MF, Holzgrabe U, Abdelmohsen UR. Natural Products Repertoire of the Red Sea. Mar Drugs 2020; 18:md18090457. [PMID: 32899763 PMCID: PMC7551641 DOI: 10.3390/md18090457] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 08/28/2020] [Accepted: 09/02/2020] [Indexed: 02/06/2023] Open
Abstract
Marine natural products have achieved great success as an important source of new lead compounds for drug discovery. The Red Sea provides enormous diversity on the biological scale in all domains of life including micro- and macro-organisms. In this review, which covers the literature to the end of 2019, we summarize the diversity of bioactive secondary metabolites derived from Red Sea micro- and macro-organisms, and discuss their biological potential whenever applicable. Moreover, the diversity of the Red Sea organisms is highlighted as well as their genomic potential. This review is a comprehensive study that compares the natural products recovered from the Red Sea in terms of ecological role and pharmacological activities.
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Affiliation(s)
- Ebaa M. El-Hossary
- National Centre for Radiation Research & Technology, Egyptian Atomic Energy Authority, Ahmed El-Zomor St. 3, El-Zohoor Dist., Nasr City, Cairo 11765, Egypt;
| | - Mohammad Abdel-Halim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo 11835, Egypt;
| | - Eslam S. Ibrahim
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt;
- Institute for Molecular Infection Biology, University of Würzburg, Josef-Schneider-Strasse 2/Bau D15, 97080 Würzburg, Germany
| | - Sheila Marie Pimentel-Elardo
- Department of Biochemistry, University of Toronto, MaRS Centre West, 661 University Avenue, Toronto, ON M5G 1M1, Canada; (S.M.P.-E.); (J.R.N.)
| | - Justin R. Nodwell
- Department of Biochemistry, University of Toronto, MaRS Centre West, 661 University Avenue, Toronto, ON M5G 1M1, Canada; (S.M.P.-E.); (J.R.N.)
| | - Heba Handoussa
- Department of Pharmaceutical Biology, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo 11835, Egypt;
| | - Miada F. Abdelwahab
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt;
| | - Ulrike Holzgrabe
- Institute for Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
- Correspondence: (U.H.); (U.R.A.)
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt;
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone, P.O. Box 61111 New Minia City, Minia 61519, Egypt
- Correspondence: (U.H.); (U.R.A.)
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Chen D, Wang Y, Cai XM, Cao X, Jiang P, Wang F, Huang S. Synthesis of Spiroisoxazolines via TEMPO/NaNO 2-Catalyzed Aerobic Oxidative Dearomatization. Org Lett 2020; 22:6847-6851. [PMID: 32808793 DOI: 10.1021/acs.orglett.0c02372] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A catalytic, aerobic oxidative dearomatization protocol has been developed for the preparation of spiroisoxazline scaffolds from oximes using TEMPO and NaNO2 as the catalyst and O2 as the sole oxidant. This dearomatization methodology features its mild reaction conditions, good functional group tolerance, and an unprecedented broad substrate scope, encompassing phenols, aryl ethers, thiophenols, aryl sulfides, etc.
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Affiliation(s)
- Dengfeng Chen
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Yaming Wang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Xu-Min Cai
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Xiaoji Cao
- College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Rd., Hangzhou, Zhejiang 310014, People's Republic of China
| | - Ping Jiang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Fei Wang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
| | - Shenlin Huang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People's Republic of China
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18
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Luparello C, Mauro M, Lazzara V, Vazzana M. Collective Locomotion of Human Cells, Wound Healing and Their Control by Extracts and Isolated Compounds from Marine Invertebrates. Molecules 2020; 25:E2471. [PMID: 32466475 PMCID: PMC7321354 DOI: 10.3390/molecules25112471] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 05/22/2020] [Accepted: 05/25/2020] [Indexed: 02/06/2023] Open
Abstract
The collective migration of cells is a complex integrated process that represents a common theme joining morphogenesis, tissue regeneration, and tumor biology. It is known that a remarkable amount of secondary metabolites produced by aquatic invertebrates displays active pharmacological properties against a variety of diseases. The aim of this review is to pick up selected studies that report the extraction and identification of crude extracts or isolated compounds that exert a modulatory effect on collective cell locomotion and/or skin tissue reconstitution and recapitulate the molecular, biochemical, and/or physiological aspects, where available, which are associated to the substances under examination, grouping the producing species according to their taxonomic hierarchy. Taken all of the collected data into account, marine invertebrates emerge as a still poorly-exploited valuable resource of natural products that may significantly improve the process of skin regeneration and restrain tumor cell migration, as documented by in vitro and in vivo studies. Therefore, the identification of the most promising invertebrate-derived extracts/molecules for the utilization as new targets for biomedical translation merits further and more detailed investigations.
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Affiliation(s)
- Claudio Luparello
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, 90128 Palermo, Italy; (M.M.); (V.L.); (M.V.)
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19
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Salib MN, Jamison MT, Molinski TF. Bromo-spiroisoxazoline Alkaloids, Including an Isoserine Peptide, from the Caribbean Marine Sponge Aplysina lacunosa. JOURNAL OF NATURAL PRODUCTS 2020; 83:1532-1540. [PMID: 32357010 DOI: 10.1021/acs.jnatprod.9b01286] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Three new bromotyrosine spiroisoxazoline alkaloids, lacunosins A and B (1 and 2) and desaminopurealin (3), were isolated from a MeOH extract of the marine sponge Aplysina lacunosa that showed modest α-chymotrypsin inhibitory activity. The structures of 1-3 share the spirocyclohexadienyl-isoxazoline ring system found in purealidin-R and several other Verongid sponge secondary metabolites. Compounds 1 and 2 are coupled to a glycine and an isoserine methyl ester, respectively. Alkaloid 3 is linked, contiguously, to an O-1-aminopropyl 3,5-dibromotyrosyl ether and, finally, to histamine through an amide bond. The planar structures of all three compounds were obtained from analysis of MS and 1D and 2D NMR data. The absolute configuration of the SIO unit of 1-3 was assigned by electronic circular dichroism (ECD). The isoserine amino acid residue in 2 was found to be a 1:1 mixture of epimers using a new Marfey's type reagent, derived from Trp-NH2. Allylic O-naphthoylation of the SIO subunit enhances the ECD spectrum of SIOs and improves discrimination of enantiomorphs. A unifying hypothesis is proposed that links the biosynthesis of several of the new compounds with previously reported analogues.
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20
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Chen D, He T, Huang Y, Luo J, Wang F, Huang S. Synthesis of Spiroisoxazolines via an Oximation/Dearomatization Cascade under Air. Org Lett 2020; 22:4429-4434. [DOI: 10.1021/acs.orglett.0c01429] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dengfeng Chen
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People’s Republic of China
| | - Tianyu He
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People’s Republic of China
| | - Yuan Huang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People’s Republic of China
| | - Jinyue Luo
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People’s Republic of China
| | - Fei Wang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People’s Republic of China
| | - Shenlin Huang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, People’s Republic of China
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21
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Li H, Yu H, Wu W, Sun P. Chemical constituents of sponge Pseudoceratina sp. and their chemotaxonomic significance. BIOCHEM SYST ECOL 2020. [DOI: 10.1016/j.bse.2020.104002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Antimicrobial activity of bacteria from marine sponge Suberea mollis and bioactive metabolites of Vibrio sp. EA348. Saudi J Biol Sci 2020; 27:1139-1147. [PMID: 32256176 PMCID: PMC7105658 DOI: 10.1016/j.sjbs.2020.02.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/27/2020] [Accepted: 02/01/2020] [Indexed: 11/22/2022] Open
Abstract
Discovery of potential bioactive metabolites from sponge-associated bacteria have gained attraction in recent years. The current study explores the potential of sponge (Suberea mollis) associated bacteria against bacterial and fungal pathogens. Sponge samples were collected from Red sea in Obhur region, Jeddah, Saudi Arabia. Of 29 isolated bacteria belong to four different classes i.e. Firmicutes (62%), γ-Proteobacteria (21%), α-Proteobacteria (10%) and Actinobacteria (7%). Among them nineteen (65%) bacterial strains showed antagonistic activity against oomycetes and only 3 (10%) bacterial strains were active against human pathogenic bacteria tested. Most bioactive genera include Bacillus (55%), Pseudovibrio (13%) and Ruegeria (10%). Enzyme production (protease, lipase, amylase, cellualse) was identified in 12 (41%) bacterial strains where potential strains belonging to γ-Proteobacteria and Firmicutes groups. Production of antimicrobial metabolites and hydrolysates in these bacteria suggest their potential role in sponge against pathogens. Further bioactive metabolites from selected strain of Vibrio sp. EA348 were identified using LC-MS and GC–MS analyses. We identified many active metabolites including antibiotics such as Amifloxacin and fosfomycin. Plant growth hormones including Indoleacetic acid and Gibberellin A3 and volatile organic compound such as methyl jasmonate were also detected in this strain. Our results highlighted the importance of marine bacteria inhabiting sponges as potential source of antimicrobial compounds and plant growth hormones of pharmaceutical and agricultural significance.
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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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Aplysinopsin-type and Bromotyrosine-derived Alkaloids from the South China Sea Sponge Fascaplysinopsis reticulata. Sci Rep 2019; 9:2248. [PMID: 30783134 PMCID: PMC6381124 DOI: 10.1038/s41598-019-38696-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 12/06/2018] [Indexed: 11/08/2022] Open
Abstract
Seven pairs of new oxygenated aplysinopsin-type enantiomers, (+)- and (-)-oxoaplysinopsins A‒G (1‒7), two new bromotyrosine-derived alkaloids, subereamollines C and D (18 and 19), together with ten known compounds (8‒17) were isolated from the Xisha Islands sponge Fascaplysinopsis reticulata. The planar structures were determined by extensive NMR and MS spectroscopic data. Each of the optically pure enantiomers was achieved by chiral HPLC separation. The absolute configurations were assigned by the quantum chemical calculation methods. Compound 19 showed cytotoxicity against Jurkat cell lines with IC50 value of 0.88 μM. Compounds 2, 16 and 17 showed tyrosine phosphatase 1B (PTP1B) inhibition activity with IC50 value ranging from 7.67 to 26.5 μM, stronger than the positive control of acarbose and 1-deoxynojirimycin. A structural activity relationship for the aplysinopsin-type enantiomers were observed in PTP1B inhibition activity of 2 and cytotoxicity of 3 that the dextrorotary (+)-2 and (+)-3 showed stronger activity than the levorotary (-)-2 and (-)-3.
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25
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El-Demerdash A, Atanasov AG, Horbanczuk OK, Tammam MA, Abdel-Mogib M, Hooper JNA, Sekeroglu N, Al-Mourabit A, Kijjoa A. Chemical Diversity and Biological Activities of Marine Sponges of the Genus Suberea: A Systematic Review. Mar Drugs 2019; 17:E115. [PMID: 30759850 PMCID: PMC6409637 DOI: 10.3390/md17020115] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/02/2019] [Accepted: 02/11/2019] [Indexed: 12/11/2022] Open
Abstract
Marine natural products (MNPs) continue to be in the spotlight in the global drug discovery endeavor. Currently, more than 30,000 structurally diverse secondary metabolites from marine sources have been isolated, making MNPs a profound, renewable source to investigate novel drug compounds. Marine sponges of the genus Suberea (family: Aplysinellidae) are recognized as producers of bromotyrosine derivatives, which are considered distinct chemotaxonomic markers for the marine sponges belonging to the order Verongida. This class of compounds exhibits structural diversity, ranging from simple monomeric molecules to more complex molecular scaffolds, displaying a myriad of biological and pharmacological potentialities. In this review, a comprehensive literature survey covering the period of 1998⁻2018, focusing on the chemistry and biological/pharmacological activities of marine natural products from marine sponges of the genus Suberea, with special attention to the biogenesis of the different skeletons of halogenated compounds, is presented.
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Affiliation(s)
- Amr El-Demerdash
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
- Organic Chemistry Division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
| | - Atanas G Atanasov
- Department of Pharmacognosy, University of Vienna, 1090 Vienna, Austria.
- Institute of Genetics and Animal Breeding of the Polish Academy of Sciences, 05-552 Jastrzebiec, Poland.
| | - Olaf K Horbanczuk
- Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences, 02-776 Warsaw, Poland.
| | - Mohamed A Tammam
- Department of Pharmacognosy and chemistry of natural products, Faculty of Pharmacy, National and kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece.
- Department of Biochemistry, Faculty of Agriculture, Fayoum University, 63514 Fayoum, Egypt.
| | - Mamdouh Abdel-Mogib
- Organic Chemistry Division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
| | - John N A Hooper
- Queensland Museum, PO Box 3300, South Brisbane BC, Queensland 4101, Australia.
| | - Nazim Sekeroglu
- Department of Food Engineering, Faculty of Engineering and Architecture, Killis 7 Aralik University, 79000 Kilis, Turkey.
| | - Ali Al-Mourabit
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
| | - Anake Kijjoa
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar & CIIMAR, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal.
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Shaala LA, Asfour HZ, Youssef DTA, Żółtowska-Aksamitowska S, Wysokowski M, Tsurkan M, Galli R, Meissner H, Petrenko I, Tabachnick K, Ivanenko VN, Bechmann N, Muzychka LV, Smolii OB, Martinović R, Joseph Y, Jesionowski T, Ehrlich H. New Source of 3D Chitin Scaffolds: The Red Sea Demosponge Pseudoceratina arabica (Pseudoceratinidae, Verongiida). Mar Drugs 2019; 17:E92. [PMID: 30717221 PMCID: PMC6410331 DOI: 10.3390/md17020092] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 01/29/2019] [Accepted: 01/30/2019] [Indexed: 01/10/2023] Open
Abstract
The bioactive bromotyrosine-derived alkaloids and unique morphologically-defined fibrous skeleton of chitin origin have been found recently in marine demosponges of the order Verongiida. The sophisticated three-dimensional (3D) structure of skeletal chitinous scaffolds supported their use in biomedicine, tissue engineering as well as in diverse modern technologies. The goal of this study was the screening of new species of the order Verongiida to find another renewable source of naturally prefabricated 3D chitinous scaffolds. Special attention was paid to demosponge species, which could be farmed on large scale using marine aquaculture methods. In this study, the demosponge Pseudoceratina arabica collected in the coastal waters of the Egyptian Red Sea was examined as a potential source of chitin for the first time. Various bioanalytical tools including scanning electron microscopy (SEM), fluorescence microscopy, FTIR analysis, Calcofluor white staining, electrospray ionization mass spectrometry (ESI-MS), as well as a chitinase digestion assay were successfully used to confirm the discovery of α-chitin within the skeleton of P. arabica. The current finding should make an important contribution to the field of application of this verongiid sponge as a novel renewable source of biologically-active metabolites and chitin, which are important for development of the blue biotechnology especially in marine oriented biomedicine.
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Affiliation(s)
- Lamiaa A Shaala
- Natural Products Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
- Suez Canal University Hospital, Suez Canal University, Ismailia 41522, Egypt.
| | - Hani Z Asfour
- Department of Medical Parasitology, Faculty of Medicine, Princess Al-Jawhara Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
| | - Diaa T A Youssef
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt.
| | - Sonia Żółtowska-Aksamitowska
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Poznan 60965, Poland.
- Institute of Electronics and Sensor Materials, Technische Universität Bergakademie-Freiberg, Freiberg 09599, Germany.
| | - Marcin Wysokowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Poznan 60965, Poland.
- Institute of Electronics and Sensor Materials, Technische Universität Bergakademie-Freiberg, Freiberg 09599, Germany.
| | - Mikhail Tsurkan
- Leibniz Institute of Polymer Research Dresden, Dresden 01069, Germany.
| | - Roberta Galli
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine, Technische Universität Dresden, Dresden 01307, Germany.
| | - Heike Meissner
- Department of Prosthetic Dentistry, Faculty of Medicine, Technische Universität Dresden, Dresden 01307, Germany.
| | - Iaroslav Petrenko
- Institute of Electronics and Sensor Materials, Technische Universität Bergakademie-Freiberg, Freiberg 09599, Germany.
| | - Konstantin Tabachnick
- P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow 117997, Russia.
| | - Viatcheslav N Ivanenko
- Department of Invertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Moscow 119992, Russia.
| | - Nicole Bechmann
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Dresden 01307, Germany.
| | - Lyubov V Muzychka
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Kiev 02094, Ukraine.
| | - Oleg B Smolii
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, Kiev 02094, Ukraine.
| | - Rajko Martinović
- Institute of Marine Biology, University of Montenegro, Kotor 85330, Montenegro.
| | - Yvonne Joseph
- Institute of Electronics and Sensor Materials, Technische Universität Bergakademie-Freiberg, Freiberg 09599, Germany.
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Poznan 60965, Poland.
| | - Hermann Ehrlich
- Institute of Electronics and Sensor Materials, Technische Universität Bergakademie-Freiberg, Freiberg 09599, Germany.
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Wooster MK, Voigt O, Erpenbeck D, Wörheide G, Berumen ML. Sponges of the Red Sea. CORAL REEFS OF THE RED SEA 2019. [DOI: 10.1007/978-3-030-05802-9_6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Adiloğlu Y, Şahin E, Tutar A, Menzek A. Cycloaddition Reactions of Benzonorbornadiene and Homonorbornadiene: New Isoxazoline and Pyridazine Derivatives. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3229] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yadigar Adiloğlu
- Faculty of Science, Department of Chemistry; Sakarya University; Sakarya 54187 Turkey
| | - Ertan Şahin
- Faculty of Science, Department of Chemistry; Atatürk University; Erzurum 25240 Turkey
| | - Ahmet Tutar
- Faculty of Science, Department of Chemistry; Sakarya University; Sakarya 54187 Turkey
| | - Abdullah Menzek
- Faculty of Science, Department of Chemistry; Atatürk University; Erzurum 25240 Turkey
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29
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El-Demerdash A, Moriou C, Toullec J, Besson M, Soulet S, Schmitt N, Petek S, Lecchini D, Debitus C, Al-Mourabit A. Bioactive Bromotyrosine-Derived Alkaloids from the Polynesian Sponge Suberea ianthelliformis. Mar Drugs 2018; 16:E146. [PMID: 29702602 PMCID: PMC5983277 DOI: 10.3390/md16050146] [Citation(s) in RCA: 15] [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: 03/29/2018] [Revised: 04/19/2018] [Accepted: 04/24/2018] [Indexed: 01/04/2023] Open
Abstract
Herein, we describe the isolation and spectroscopic identification of eight new tetrabrominated tyrosine alkaloids 2⁻9 from the Polynesian sponge Suberea ianthelliformis, along with known major compound psammaplysene D (1), N,N-dimethyldibromotyramine, 5-hydroxy xanthenuric acid, and xanthenuric acid. Cytotoxicity and acetylcholinesterase inhibition activities were evaluated for some of the isolated metabolites. They exhibited moderate antiproliferative activity against KB cancer cell lines, but psammaplysene D (1) displayed substantial cytotoxicity as well as acetylcholinesterase inhibition with IC50 values of 0.7 μM and 1.3 μM, respectively.
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Affiliation(s)
- Amr El-Demerdash
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
- Organic Chemistry Division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
| | - Céline Moriou
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
| | - Jordan Toullec
- LEMAR, IRD, UBO, CNRS, IFREMER, IUEM, 29280 Plouzané, France.
| | - Marc Besson
- CRIOBE, CNRS, EPHE, UPVD, PSL Research University, 98729 Moorea, French Polynesia.
- Observatoire Océanologique de Banyuls-sur-Mer, Université Pierre et Marie Curie Paris, 66650 Banyuls-sur-Mer, France.
| | - Stéphanie Soulet
- EIO, UPF, ILM, IFREMER, IRD, Faa'a, 98702 Tahiti, French Polynesia.
| | - Nelly Schmitt
- EIO, UPF, ILM, IFREMER, IRD, Faa'a, 98702 Tahiti, French Polynesia.
| | - Sylvain Petek
- LEMAR, IRD, UBO, CNRS, IFREMER, IUEM, 29280 Plouzané, France.
| | - David Lecchini
- CRIOBE, CNRS, EPHE, UPVD, PSL Research University, 98729 Moorea, French Polynesia.
| | - Cécile Debitus
- LEMAR, IRD, UBO, CNRS, IFREMER, IUEM, 29280 Plouzané, France.
| | - Ali Al-Mourabit
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
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Ehrlich H, Bazhenov VV, Debitus C, de Voogd N, Galli R, Tsurkan MV, Wysokowski M, Meissner H, Bulut E, Kaya M, Jesionowski T. Isolation and identification of chitin from heavy mineralized skeleton of Suberea clavata (Verongida: Demospongiae: Porifera) marine demosponge. Int J Biol Macromol 2017; 104:1706-1712. [PMID: 28185932 DOI: 10.1016/j.ijbiomac.2017.01.141] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/08/2017] [Accepted: 01/31/2017] [Indexed: 10/20/2022]
Abstract
Since the discovery of chitin in skeletal structures of sponges (Porifera) in 2007, studies on search of novel species which possess this structural aminopolysaccharide continue up today. The most potential source of chitin is suggested to be localized in the four families of sponges related to the order Verongida (Demospongiae) which nevertheless require further clarification. Here, we report for the first time the isolation and identification of α-chitin from the Suberea clavata demosponge (Aplysinidae: Verongida). Raman spectroscopy, Calcofluor White staining, chitinase test and ESI-MS techniques were used to identify chitin. We suggest that the presence of chitin within fibrous skeletons of diverse species of Verongida order, and, especially in all species of the Aplysinidae family, may be useful for the identification of novel, previously unidentified marine demosponges.
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Affiliation(s)
- Hermann Ehrlich
- Institute of Experimental Physics, TU Bergakademie Freiberg, Leipziger Str. 23, 09599 Freiberg, Germany
| | - Vasilii V Bazhenov
- Institute of Experimental Physics, TU Bergakademie Freiberg, Leipziger Str. 23, 09599 Freiberg, Germany; Current address: European XFEL, Albert-Einstein-Ring 19, 22761 Hamburg, Germany
| | - Cecile Debitus
- UMR 241 EIO, IRD - BP529 - 98713 Papeete, Polynésie Française, France
| | - Nicole de Voogd
- Naturalis Biodiversity Centre, P.O. Box 9517, Leiden 2300 RA, the Netherlands
| | - Roberta Galli
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine, TU Dresden, Fetscher Str. 74, D-01307 Dresden, Germany
| | - Mikhail V Tsurkan
- Leibniz Institute of Polymer Research Dresden, Hohestraße 6, 01069 Dresden, Germany
| | - Marcin Wysokowski
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 61131 Poznan, Poland
| | - Heike Meissner
- Clinical Sensoring and Monitoring, Department of Anesthesiology and Intensive Care Medicine, Faculty of Medicine, TU Dresden, Fetscher Str. 74, D-01307 Dresden, Germany
| | - Esra Bulut
- Aksaray University, Faculty of Science and Letters, Department of Biotechnology and Molecular Biology, 68100, Aksaray, Turkey
| | - Murat Kaya
- Aksaray University, Faculty of Science and Letters, Department of Biotechnology and Molecular Biology, 68100, Aksaray, Turkey
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 61131 Poznan, Poland
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31
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A Critical Evaluation of the Quality of Published 13C NMR Data in Natural Product Chemistry. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2017; 105:137-215. [PMID: 28194563 DOI: 10.1007/978-3-319-49712-9_3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Nuclear Magnetic Resonance spectroscopy contributes very efficiently to the structure elucidation process in organic chemistry. Carbon-13 NMR spectroscopy allows direct insight into the skeleton of organic compounds and therefore plays a central role in the structural assignment of natural products. Despite this important contribution, there is no established and well-accepted workflow protocol utilized during the first steps of interpreting spectroscopic data and converting them into structural fragments and then combining them, by considering the given spectroscopic constraints, into a final proposal of structure. The so-called "combinatorial explosion" in the process of structure generation allows in many cases the generation of reasonable alternatives, which are usually ignored during manual interpretation of the measured data leading ultimately to a large number of structural revisions. Furthermore, even when the determined structure is correct, problems may exist such as assignment errors, ignoring chemical shift values, or assigning lines of impurities to the compound under consideration. An extremely large heterogeneity in the presentation of carbon NMR data can be observed, but, as a result of the efficiency and precision of spectrum prediction, the published data can be analyzed in substantial detail.This contribution presents a comprehensive analysis of frequently occurring errors with respect to 13C NMR spectroscopic data and proposes a straightforward protocol to eliminate a high percentage of the most obvious errors. The procedure discussed can be integrated readily into the processes of submission and peer-reviewing of manuscripts.
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32
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Park S, Kim JH, Kim JE, Song GY, Zhou W, Goh SH, Na M, Oh S. Cytotoxic activity of aeroplysinin-1 against colon cancer cells by promoting β-catenin degradation. Food Chem Toxicol 2016; 93:66-72. [DOI: 10.1016/j.fct.2016.04.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/12/2016] [Accepted: 04/22/2016] [Indexed: 11/27/2022]
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33
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Göthel Q, Sirirak T, Köck M. Bromotyrosine-derived alkaloids from the Caribbean sponge Aplysina lacunosa. Beilstein J Org Chem 2015; 11:2334-42. [PMID: 26734082 PMCID: PMC4685874 DOI: 10.3762/bjoc.11.254] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 09/01/2015] [Indexed: 11/24/2022] Open
Abstract
Three new bromotyrosine-derived alkaloids 14-debromo-11-deoxyfistularin-3 (1), aplysinin A (2), and aplysinin B (3), together with 15 known compounds (4-18) were isolated from the sponge Aplysina lacunosa collected from Stirrup Cay, Bahamas. The structures of the isolated compounds were identified on the basis of MS and NMR data analysis. The (13)C NMR assignment of spirocyclohexadienylisoxazoline moieties of 1 and 2 were confirmed by an 1,1-ADEQUATE experiment. Compounds 1 and 2 showed a mild to moderate cytotoxic activities against KB-31 and FS4-LTM cell lines. Only aplysinin A (2) exhibited cytotoxicity against MCF-7 cells.
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Affiliation(s)
- Qun Göthel
- Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Thanchanok Sirirak
- Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Matthias Köck
- Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Handelshafen 12, 27570 Bremerhaven, Germany
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34
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Shaala LA, Youssef DT, Badr JM, Sulaiman M, Khedr A, El Sayed KA. Bioactive alkaloids from the Red Sea marine Verongid sponge Pseudoceratina arabica. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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35
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Bioactive secondary metabolites from the Red Sea marine Verongid sponge Suberea species. Mar Drugs 2015; 13:1621-31. [PMID: 25812033 PMCID: PMC4413177 DOI: 10.3390/md13041621] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Revised: 03/04/2015] [Accepted: 03/17/2015] [Indexed: 11/16/2022] Open
Abstract
In a continuation of our efforts to identify bioactive compounds from Red Sea Verongid sponges, the organic extract of the sponge Suberea species afforded seven compounds including two new dibrominated alkaloids, subereamollines C and D (1 and 2), together with the known compounds aerothionin (3), homoaerothionin (4), aeroplysinin-1 (5), aeroplysinin-2 (6) and a revised subereaphenol C (7) as ethyl 2-(2,4-dibromo-3,6-dihydroxyphenyl)acetate. The structures of the isolated compounds were assigned by different spectral data including optical rotations, 1D (1H and 13C) and 2D (COSY, multiplicity-edited HSQC, and HMBC) NMR and high-resolution mass spectroscopy. Aerothionin (3) and subereaphenol C (7) displayed potent cytotoxic activity against HeLa cell line with IC50 values of 29 and 13.3 µM, respectively. In addition, aeroplysinin-2 (6) showed potent antimigratory activity against the human breast cancer cell line MDA-MB-231 with IC50 of 18 µM. Subereamollines C and D are new congeners of the previously reported compounds subereamollines A and B with methyl ester functionalities on the side chain. These findings provide further insight into the biosynthetic capabilities of members of the genus Suberea and the chemical diversity as well as the biological activity of these compounds.
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36
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Niemann H, Marmann A, Lin W, Proksch P. Sponge Derived Bromotyrosines: Structural Diversity through Natural Combinatorial Chemistry. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000143] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Sponge derived bromotyrosines are a multifaceted class of marine bioactive compounds that are important for the chemical defense of sponges but also for drug discovery programs as well as for technical applications in the field of antifouling constituents. These compounds, which are mainly accumulated by Verongid sponges, exhibit a diverse range of bioactivities including antibiotic, cytotoxic and antifouling effects. In spite of the simple biogenetic building blocks, which consist only of brominated tyrosine and tyramine units, an impressive diversity of different compounds is obtained through different linkages between these precursors and through structural modifications of the side chains and/or aromatic rings resembling strategies that are known from combinatorial chemistry. As examples for bioactive, structurally divergent bromotyrosines psammaplin A, Aplysina alkaloids featuring aerothionin, aeroplysinin-1 and the dienone, and the bastadins, including the synthetically derived hemibastadin congeners, have been selected for this review. Whereas all of these natural products are believed to be involved in the chemical defense of sponges, some of them may also be of particular relevance to drug discovery due to their interaction with specific molecular targets in eukaryotic cells. These targets involve important enzymes and receptors, such as histone deacetylases (HDAC) and DNA methyltransferases (DNMT), which are inhibited by psammaplin A, as well as ryanodine receptors that are targeted by bastadine type compounds. The hemibastadins such as the synthetically derived dibromohemibastadin are of particular interest due to their antifouling activity. For the latter, a phenoloxidase which catalyzes the bioglue formation needed for firm attachment of fouling organisms to a given substrate was identified as a molecular target. The Aplysina alkaloids finally provide a vivid example for dynamic wound induced bioconversions of natural products that generate highly efficient chemical weapons precisely when and where needed.
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Affiliation(s)
- Hendrik Niemann
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine University, 40225 Düsseldorf, Germany
| | - Andreas Marmann
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine University, 40225 Düsseldorf, Germany
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Health Science Center, Beijing100191, China
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine University, 40225 Düsseldorf, Germany
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37
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Red Sea Suberea mollis Sponge Extract Protects against CCl4-Induced Acute Liver Injury in Rats via an Antioxidant Mechanism. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 2014:745606. [PMID: 25214875 PMCID: PMC4157001 DOI: 10.1155/2014/745606] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 07/22/2014] [Accepted: 07/22/2014] [Indexed: 01/14/2023]
Abstract
Recent studies have demonstrated that marine sponges and their active constituents exhibited several potential medical applications. This study aimed to evaluate the possible hepatoprotective role as well as the antioxidant effect of the Red Sea Suberea mollis sponge extract (SMSE) on carbon tetrachloride- (CCl4-) induced acute liver injury in rats. In vitro antioxidant activity of SMSE was evaluated by 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) assay. Rats were orally administered three different concentrations (100, 200, and 400 mg/kg) of SMSE and silymarin (100 mg/kg) along with CCl4 (1 mL/kg, i.p., every 72 hr) for 14 days. Plasma aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and total bilirubin were measured. Hepatic malondialdehyde (MDA), reduced glutathione (GSH), nitric oxide (NO), superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase (CAT) were also measured. Liver specimens were histopathologically examined. SMSE showed strong scavenging activity against free radicals in DPPH assay. SMSE significantly reduced liver enzyme activities. Moreover, SMSE significantly reduced hepatic MDA formation. In addition, SMSE restored GSH, NO, SOD, GPx, and CAT. The histopathological results confirmed these findings. The results of this study suggested a potent protective effect of the SMSE against CCl4-induced hepatic injury. This may be due to its antioxidant and radical scavenging activity.
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38
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Das P, Valente EJ, Hamme AT. A Model Study toward the Concise Synthesis of Bromotyrosine Derived Spiroisoxazoline Natural Products and Analogous Core Structures. European J Org Chem 2014; 2014:2659-2663. [PMID: 24891836 PMCID: PMC4039208 DOI: 10.1002/ejoc.201400009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Indexed: 11/06/2022]
Abstract
A model study of the first non-aromatic ring based approach toward α-hydroxyspiroisoxazolines resembling the bromotyrosine derived natural product and analogous spiroisoxazoline core structures were implemented. The desired molecular architecture was achieved through the multifunctionalization of a key 1,3-diketo spiroisoxazoline. Our strategy could serve as an efficient alternative of previously developed approaches that utilize an aromatic ring oxidation as the essential step to synthesize this class of natural products.
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Affiliation(s)
- Prasanta Das
- Department of Chemistry & Biochemistry, Jackson State University 1400 J. R. Lynch St, PO Box 17910, Jackson, Ms 39217, USA, Fax: (+)1 601 979 3674, Tel: (+)1 601 979 3713, Homepage: http://www.jsums.edu/chemistry/ashton-t-hamme-ii/
| | - Edward J. Valente
- Department of Chemistry, University of Portland, 5000 N Willamette Blvd., Portland, OR 97203, USA
| | - Ashton T. Hamme
- Department of Chemistry & Biochemistry, Jackson State University 1400 J. R. Lynch St, PO Box 17910, Jackson, Ms 39217, USA, Fax: (+)1 601 979 3674, Tel: (+)1 601 979 3713, Homepage: http://www.jsums.edu/chemistry/ashton-t-hamme-ii/
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Kaur K, Kumar V, Sharma AK, Gupta GK. Isoxazoline containing natural products as anticancer agents: a review. Eur J Med Chem 2014; 77:121-33. [PMID: 24631731 DOI: 10.1016/j.ejmech.2014.02.063] [Citation(s) in RCA: 182] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 02/25/2014] [Accepted: 02/28/2014] [Indexed: 10/25/2022]
Abstract
Isoxazolines are an important class of nitrogen and oxygen containing heterocycles that belong to the azoles family which have gained much importance in the field of medicinal chemistry as the anticancer agents. Moreover, natural products are always expectedly regarded as an important hoard of a large number of potential chemotherapeutic candidates. Therefore, this review mainly focuses on the existence of isoxazoline derivatives in natural sources, their isolation and uses there of as anticancer agents besides highlighting the synthetic pathways to achieve these compounds. Structural-activity relationship and the influence of stereochemical aspects on anticancer activity of such compounds have also been discussed. It covers the literature upto 2014 and would certainly provide a great insight to scientific community to accelerate further research for the development of some novel anticancer drugs.
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Affiliation(s)
- Kamalneet Kaur
- Department of Chemistry, Maharishi Markandeshwar University, Mullana, Ambala 133207, India
| | - Vinod Kumar
- Department of Chemistry, Maharishi Markandeshwar University, Mullana, Ambala 133207, India.
| | - Anil Kumar Sharma
- Department of Biotechnology, Maharishi Markandeshwar University, Mullana, Ambala 133207, India
| | - Girish Kumar Gupta
- Department of Pharmaceutical Chemistry, Maharishi Markandeshwar University, Mullana, Ambala 133207, India
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41
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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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Shaala LA, Youssef DTA, Sulaiman M, Behery FA, Foudah AI, Sayed KAE. Subereamolline A as a potent breast cancer migration, invasion and proliferation inhibitor and bioactive dibrominated alkaloids from the Red Sea sponge Pseudoceratina arabica. Mar Drugs 2012; 10:2492-508. [PMID: 23203273 PMCID: PMC3509531 DOI: 10.3390/md10112492] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 10/18/2012] [Accepted: 10/19/2012] [Indexed: 11/17/2022] Open
Abstract
A new collection of several Red Sea sponges was investigated for the discovery of potential breast cancer migration inhibitors. Extracts of the Verongid sponges Pseudoceratina arabica and Suberea mollis were selected. Bioassay-directed fractionation of both sponges, using the wound-healing assay, resulted into the isolation of several new and known brominated alkaloids. Active fractions of the sponge Pseudoceratina arabica afforded five new alkaloids, ceratinines A-E (2-6), together with the known alkaloids moloka'iamine (1), hydroxymoloka'iamine (7) and moloka'iakitamide (8). The active fraction of the sponge Suberea mollis afforded the three known alkaloids subereamolline A (9), aerothionin (10) and homoaerothionin (11). Ceratinine B (3) possesses an unprecedented 5,7-dibrominated dihydroindole moiety with an epoxy ring on the side chain of a fully substituted aromatic moiety. Ceratinines D (5) and E (6) possess a terminal formamide moiety at the ethylamine side chain. Subereamolline A (9) potently inhibited the migration and invasion of the highly metastatic human breast cancer cells MDA-MB-231 at the nanomolar doses. Subereamolline A and related brominated alkaloids are novel scaffolds appropriate for further future use for the control of metastatic breast cancer.
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Affiliation(s)
- Lamiaa A Shaala
- Natural Products Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia
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Kalaitzis JA, Davis RA, Quinn RJ. Unequivocal 13C NMR assignment of cyclohexadienyl rings in bromotyrosine-derived metabolites from marine sponges. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2012; 50:749-54. [PMID: 22961686 DOI: 10.1002/mrc.3868] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 07/31/2012] [Accepted: 08/09/2012] [Indexed: 05/25/2023]
Abstract
Bromotyrosine-derived compounds are commonly isolated from Verongida sponges and are a major class of marine natural products. Here we report on the unequivocal (13)C NMR assignment of the brominated carbons at positions C-2 and C-4 of the cyclohexadiene ring, two carbons whose resonances are often incorrectly assigned. Interpretation of HMBC data acquired for a series of known bromotyrosine analogues, which included ianthesine E(1), aerothionin (2), 11-hydroxyaerothionin (3), and 11,19-dideoxyfistularin-3 (4), allowed us to unequivocally assign the carbons in question, C-2 and C-4, through the observance of unique HMBC correlations from the C-1 hydroxyl proton. Here we present the complete 2D NMR data sets recorded in DMSO-d(6) for 2-4 that were used to confirm the assignment and establish the working model. Using this model, a survey of the literature revealed that many members of this structure class had been wrongly assigned. This paper serves to reassign those compounds whose (13)C NMR assignment at positions C-2 and C-4 of the cyclohexadiene ring should be reversed.
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Affiliation(s)
- John A Kalaitzis
- Eskitis Institute, Griffith University, Brisbane, QLD 4111, Australia
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Structural and stereochemical investigations into bromotyrosine-derived metabolites from southern Australian marine sponges, Pseudoceratina spp. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.09.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
Once considered to be isolation artifacts or chemical "mistakes" of nature, the number of naturally occurring organohalogen compounds has grown from a dozen in 1954 to >5000 today. Of these, at least 25% are halogenated alkaloids. This is not surprising since nitrogen-containing pyrroles, indoles, carbolines, tryptamines, tyrosines, and tyramines are excellent platforms for biohalogenation, particularly in the marine environment where both chloride and bromide are plentiful for biooxidation and subsequent incorporation into these electron-rich substrates. This review presents the occurrence of all halogenated alkaloids, with the exception of marine bromotyrosines where coverage begins where it left off in volume 61 of The Alkaloids. Whereas the biological activity of these extraordinary compounds is briefly cited for some examples, a future volume of The Alkaloids will present full coverage of this topic and will also include selected syntheses of halogenated alkaloids. Natural organohalogens of all types, especially marine and terrestrial halogenated alkaloids, comprise a rapidly expanding class of natural products, in many cases expressing powerful biological activity. This enormous proliferation has several origins: (1) a revitalization of natural product research in a search for new drugs, (2) improved compound characterization methods (multidimensional NMR, high-resolution mass spectrometry), (3) specific enzyme-based and other biological assays, (4) sophisticated collection methods (SCUBA and remote submersibles for deep ocean marine collections), (5) new separation and purification techniques (HPLC and countercurrent separation), (6) a greater appreciation of traditional folk medicine and ethobotany, and (7) marine bacteria and fungi as novel sources of natural products. Halogenated alkaloids are truly omnipresent in the environment. Indeed, one compound, Q1 (234), is ubiquitous in the marine food web and is found in the Inuit from their diet of whale blubber. Given the fact that of the 500,000 estimated marine organisms--which are the source of most halogenated alkaloids--only a small percentage have been investigated for their chemical content, it is certain that myriad new halogenated alkaloids are awaiting discovery. For example, it is estimated that nearly 4000 species of bryozoans have not been examined for their chemical content. The few species that have been studied contain some extraordinary halogenated alkaloids, such as hinckdentine A (610) and the chartellines (611-613). Of the estimated 1.5 million species of fungi, secondary metabolites have been characterized from only 5000 species. The future seems bright for the collector of halogenated alkaloids!
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire, USA.
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Abstract
Covering: 2010. Previous review: Nat. Prod. Rep., 2011, 28, 196. This review covers the literature published in 2010 for marine natural products, with 895 citations (590 for the period January to December 2010) 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 (1003 for 2010), 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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Suyama TL, Gerwick WH, McPhail KL. Survey of marine natural product structure revisions: a synergy of spectroscopy and chemical synthesis. Bioorg Med Chem 2011; 19:6675-701. [PMID: 21715178 PMCID: PMC3205310 DOI: 10.1016/j.bmc.2011.06.011] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 05/09/2011] [Accepted: 06/02/2011] [Indexed: 11/16/2022]
Abstract
The structural assignment of new natural product molecules supports research in a multitude of disciplines that may lead to new therapeutic agents and or new understanding of disease biology. However, reports of numerous structural revisions, even of recently elucidated natural products, inspired the present survey of techniques used in structural misassignments and subsequent revisions in the context of constitutional or configurational errors. Given the comparatively recent development of marine natural products chemistry, coincident with modern spectroscopy, it is of interest to consider the relative roles of spectroscopy and chemical synthesis in the structure elucidation and revision of those marine natural products that were initially misassigned. Thus, a tabulated review of all marine natural product structural revisions from 2005 to 2010 is organized according to structural motif revised. Misassignments of constitution are more frequent than perhaps anticipated by reliance on HMBC and other advanced NMR experiments, especially when considering the full complement of all natural products. However, these techniques also feature prominently in structural revisions, specifically of marine natural products. Nevertheless, as is the case for revision of relative and absolute configuration, total synthesis is a proven partner for marine, as well as terrestrial, natural products structure elucidation. It also becomes apparent that considerable 'detective work' remains in structure elucidation, in spite of the spectacular advances in spectroscopic techniques.
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Affiliation(s)
- Takashi L. Suyama
- Department of Pharmaceutical Sciences, 203 Pharmacy Building, Oregon State University, Corvallis OR 97331, U.S.A
| | - William H. Gerwick
- Scripps Institution of Oceanography and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla CA 92093-0212, U.S.A
| | - Kerry L. McPhail
- Department of Pharmaceutical Sciences, 203 Pharmacy Building, Oregon State University, Corvallis OR 97331, U.S.A
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Shaala LA, Bamane FH, Badr JM, Youssef DTA. Brominated arginine-derived alkaloids from the red sea sponge Suberea mollis. JOURNAL OF NATURAL PRODUCTS 2011; 74:1517-1520. [PMID: 21542602 DOI: 10.1021/np200120d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Investigation of a new collection of the Red Sea sponge Suberea mollis afforded two new brominated arginine-derived alkaloids, subereamines A (1) and B (2), a new brominated phenolic compound, subereaphenol D (3), and the known compounds dichloroverongiaquinol (4), aerothionin (5), and purealdin L (6). The structures of the isolated compounds were assigned using one- and two-dimensional NMR spectra and HRFABMS data. The absolute configurations of subereamines A (1) and B (2) were determined by acid hydrolysis followed by chiral-phase LC-MS. The antimicrobial and antioxidant activities of the isolated compounds have been evaluated. Dichloroverongiaquinol and subereaphenol D displayed significant antimicrobial activity. Using the DPPH TLC autographic rapid screen for free radical scavenging effects, subereaphenol D displayed a significant antioxidant effect. In addition, the cytotoxic activities of the isolated compounds were investigated.
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Affiliation(s)
- Lamiaa A Shaala
- King Fahd Center for Medical Research, King Abdulaziz University, Kingdom of Saudi Arabia
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Shaker KH, Zinecker H, Ghani MA, Imhoff JF, Schneider B. Bioactive metabolites from the sponge Suberea sp. Chem Biodivers 2011; 7:2880-7. [PMID: 21162000 DOI: 10.1002/cbdv.200900277] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two new brominated compounds, subereaphenol K (2) and 2-(3,5-dibromo-1-ethoxy-4-oxocyclohexa-2,5-dien-1-yl)acetamide (3), together with subereaphenol B (methyl 2-(2,4-dibromo-3,6-dihydroxyphenyl)acetate; 1) with a revised structure, and five dibromotyrosine-derived metabolites, 4-8, were isolated from the sponge Suberea sp. and characterized by 1D- and 2D-NMR spectroscopic and HR-MS spectrometric data. Compounds 1, 2, 6, and 8 exhibited various weak or moderate bioactivities, including antimicrobial and cytotoxic activities. Furthermore, compounds 1 and 2 inhibited human recombinant phosphodiesterase 4 (PDE4) with IC₅₀ values of 2 μM, whereas compounds 6 and 8 were less active.
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