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Lim EQ, Ahemad N, Yap MKK. High-throughput virtual screening, pharmacophore modelling and antagonist effects of small molecule inhibitors against cytotoxin-induced cytotoxicity. J Biomol Struct Dyn 2023:1-15. [PMID: 38100546 DOI: 10.1080/07391102.2023.2293275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 12/01/2023] [Indexed: 12/17/2023]
Abstract
Cobra venom cytotoxins (CTX) cause dermonecrosis in envenomed patients who suffered from limb amputations due to the limitation of serotherapy-based antivenoms. This study aimed to identify small molecule inhibitors against CTX. A structure-based high-throughput virtual screening (HTVS) was conducted based on a conserved CTX, using the Natural Product Activity and Species Source (NPASS) screening library. The hits were valerenic acid, 1-oxo-2H-isoquinoline-4-carboxylic acid, acenaphthene, and 5-bromopyrrole-2-carboxamide, which interacted with contemporary antivenom binding site A and functional loops I-III of CTX, respectively, in molecular docking studies. Furthermore, molecular dynamic simulations were performed along with analysis of ligand fitness through their pharmacophore and pharmacokinetics properties. The antagonist effects of these hits on CTX-induced cytotoxicity were examined in human keratinocytes (HaCaT). Despite having a low binding affinity (KD = 14.45 × 10-4 M), acenaphthene demonstrated a significant increase of cell viability at 6 h and 24 h in experimental envenomed HaCaT. It also demonstrated the highest neutralization potency against CTX with a median effective concentration (EC50) of 0.05 mL/mg. Acenaphthene interacted with the functional loop II, which is the crucial cytotoxic site of CTX. It has an aromatic ring as its primary pharmacophoric feature, commonly used for rational drug design. In conclusion, acenaphthene could be a promising lead compound as a small molecule inhibitor.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- En Qi Lim
- School of Science, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
| | - Nafees Ahemad
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
| | - Michelle Khai Khun Yap
- School of Science, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
- Tropical Medicine and Biology Multidisciplinary Platform, Monash University Malaysia, Bandar Sunway, Selangor, Malaysia
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3
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Chu MJ, Li M, Ma H, Li PL, Li GQ. Secondary metabolites from marine sponges of the genus Agelas: a comprehensive update insight on structural diversity and bioactivity. RSC Adv 2022; 12:7789-7820. [PMID: 35424773 PMCID: PMC8982468 DOI: 10.1039/d1ra08765g] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 03/03/2022] [Indexed: 01/07/2023] Open
Abstract
As one of the most common marine sponges in tropical and subtropical oceans, the sponges of the genus Agelas, have emerged as unique and yet under-investigated pools for discovery of natural products with fabulous molecular diversity and myriad interesting biological activities. The present review highlights the chemical structure and biological activity of 355 compounds that have been isolated and characterized from the members of Agelas sponges, over the period of about five decades (from 1971 to November 2021). For a better understanding, these numerous compounds are firstly classified and presented according to their carbon skeleton as well as their biosynthetic origins. Relevant summaries focusing on the source organism and the associated bioactivity of these compounds belonging to different chemical classes are also provided. This review highlights sponges of the genus Agelas as exciting source for discovery of intriguing natural compounds.
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Affiliation(s)
- Mei-Jun Chu
- College of Veterinary Medicine, Qingdao Agricultural University Qingdao 266109 China
| | - Meng Li
- Department of Pharmacy, Qingdao Central Hospital Qingdao 266042 China
| | - He Ma
- College of Veterinary Medicine, Qingdao Agricultural University Qingdao 266109 China
| | - Ping-Lin Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology Qingdao 266235 China
| | - Guo-Qiang Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China Qingdao 266003 China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology Qingdao 266235 China
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4
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Marine Organisms from the Yucatan Peninsula (Mexico) as a Potential Natural Source of Antibacterial Compounds. Mar Drugs 2020; 18:md18070369. [PMID: 32708418 PMCID: PMC7404059 DOI: 10.3390/md18070369] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/10/2020] [Accepted: 07/15/2020] [Indexed: 01/15/2023] Open
Abstract
A total of 51 sponges (Porifera) and 13 ascidians (Chordata) were collected on the coast of the Yucatan Peninsula (Mexico) and extracted with organic solvents. The resulting extracts were screened for antibacterial activity against four multidrug-resistant (MDR) bacterial pathogens: the Gram-negative Acinetobacter baumannii, Klebsiella pneumoniae, and Pseudomonas aeruginosa and the Gram-positive Staphylococcus aureus. The minimum inhibitory concentrations (MICs) of the organic extracts of each marine organism were determined using a broth microdilution assay. Extracts of eight of the species, in particular the Agelas citrina and Haliclona (Rhizoniera) curacaoensis, displayed activity against some of the pathogens tested. Some of the extracts showed similar MIC values to known antibiotics such as penicillins and aminoglycosides. This study is the first to carry out antimicrobial screening of extracts of marine sponges and ascidians collected from the Yucatan Peninsula. Bioassay-guided fractionation of the active extracts from the sponges Amphimedon compressa and A. citrina displayed, as a preliminary result, that an inseparable mixture of halitoxins and amphitoxins and (-)-agelasine B, respectively, are the major compounds responsible for their corresponding antibacterial activities. This is the first report of the antimicrobial activity of halitoxins and amphitoxins against major multidrug-resistant human pathogens. The promising antibacterial activities detected in this study indicate the coast of Yucatan Peninsula as a potential source of a great variety of marine organisms worthy of further research.
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Hamed ANE, Schmitz R, Bergermann A, Totzke F, Kubbutat M, Müller WEG, Youssef DTA, Bishr MM, Kamel MS, Edrada-Ebel R, Wätjen W, Proksch P. Bioactive pyrrole alkaloids isolated from the Red Sea: marine sponge Stylissa carteri. ACTA ACUST UNITED AC 2019; 73:199-210. [PMID: 29353267 DOI: 10.1515/znc-2017-0161] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/30/2017] [Indexed: 02/06/2023]
Abstract
Fifteen pyrrole alkaloids were isolated from the Red Sea marine sponge Stylissa carteri and investigated for their biological activities. Four of them were dibrominated [(+) dibromophakelline, Z-3-bromohymenialdisine, (±) ageliferin and 3,4-dibromo-1H-pyrrole-2-carbamide], nine compounds were monobrominated [(-) clathramide C, agelongine, (+) manzacidin A, (-) 3-bromomanzacidin D, Z-spongiacidin D, Z-hymenialdisine, 2-debromostevensine, 2-bromoaldisine and 4-bromo-1H-pyrrole-2-carbamide)] and finally, two compounds were non-brominated derivatives viz., E-debromohymenialdisine and aldisine. The structure elucidations of isolated compounds were based on 1D & 2D NMR spectroscopic and MS studies, as well as by comparison with literature. In-vitro, Z-spongiacidin D exhibited a moderate activity on (ARK5, CDK2-CycA, CDK4/CycD1, VEGF-R2, SAK and PDGFR-beta) protein kinases. Moreover, Z-3-bromohymenialdisine showed nearly similar pattern. Furthermore, Z-hymenialdisine displayed a moderate effect on (ARK5 & VEGF-R2) and (-) clathramide C showed a moderate activity on AURORA-A protein kinases. While, agelongine, (+) manzacidin A, E-debromohymenialdisine and 3,4-dibromo-1H-pyrrole-2-carbamide demonstrated only marginal inhibitory activities. The cytotoxicity study was evaluated in two different cell lines. The most effective secondary metabolites were (+) dibromophakelline and Z-3-bromohymenialdisine on L5178Y. Finally, Z-hymenialdisine, Z-3-bromohymenialdisine and (±) ageliferin exhibited the highest cytotoxic activity on HCT116. No report about inhibition of AURORA-A and B by hymenialdisine/hymenialdisine analogs existed and no reported toxicity of ageliferin existed in literature.
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Affiliation(s)
- Ashraf N E Hamed
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität, Universitätsstrasse 1, Geb. 26.23, 40225 Düsseldorf, Germany
| | - Roland Schmitz
- Institut für Toxikologie, 1011007, Heinrich-Heine-Universität, Düsseldorf, Germany
| | - Anja Bergermann
- Martin-Luther-Universität Halle-Wittenberg, Faculty III, Institut für Agrar- und Ernährungswissenschaften, Weinbergweg 22, 06120 Halle/Saale, Germany
| | - Frank Totzke
- ProQinase GmbH, Breisacher Str. 117, D-79106 Freiburg, Germany
| | | | - Werner E G Müller
- Institut für Physiologische Chemie, Universitätsmedizin der Johannes Gutenberg-Universität Mainz, Düsbergweg 6, 55128 Mainz, Germany
| | - Diaa T A Youssef
- Department of Natural Products, Faculty of Pharmacy, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Mokhtar M Bishr
- Research and Development Department, Mepaco Company, Cairo, 11361, Egypt
| | - Mohamed S Kamel
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt
| | - RuAngelie Edrada-Ebel
- Strathclyde Institute of Pharmacy and Biomedical Science, Strathclyde University, The John Arbuthnott Building, 161 Cathedral Street, Glasgow G4 0NR, UK
| | - Wim Wätjen
- Institut für Toxikologie, 1011007, Heinrich-Heine-Universität, Düsseldorf, Germany
- Martin-Luther-Universität Halle-Wittenberg, Faculty III, Institut für Agrar- und Ernährungswissenschaften, Weinbergweg 22, 06120 Halle/Saale, Germany
| | - Peter Proksch
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität, Universitätsstrasse 1, Geb. 26.23, 40225 Düsseldorf, Germany
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Hassan W, Elkhayat ES, Edrada RA, Ebel R, Proksch P. New Bromopyrrole Alkaloids from the Marine Sponges Axinella Damicornis and Stylissa Flabelliformis. Nat Prod Commun 2019. [DOI: 10.1177/1934578x0700201121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Investigation of the tropical sponges Axinella damicornis and Stylissa flabelliformis, family Axinillidae, afforded five new bromopyrrole alkaloids (1–5) and thirteen known compounds (6–18). Semi synthesis of 5 was carried out in order to confirm its structure. The structures of the isolated compounds were elucidated using 1D- and 2D-NMR spectroscopy and mass spectrometry. The cytotoxicity, antimicrobial and protein-kinase inhibition activities were tested for the isolated compounds.
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Affiliation(s)
- Wafaa Hassan
- Institut für Pharmazeutische Biologie, Heinrich-Heine-Universität, Universitätsstr 1, 40225 Düsseldorf, Germany
- Pharmacognosy Department, Zagazig University, Egypt
| | - Ehab S. Elkhayat
- Institut für Pharmazeutische Biologie, Heinrich-Heine-Universität, Universitätsstr 1, 40225 Düsseldorf, Germany
- Pharmacognosy Department, Faculty of Pharmacy, Al-Azhar University, Assiut, Egypt
| | - Ru AnGelie Edrada
- Institut für Pharmazeutische Biologie, Heinrich-Heine-Universität, Universitätsstr 1, 40225 Düsseldorf, Germany
| | - Rainer Ebel
- Institut für Pharmazeutische Biologie, Heinrich-Heine-Universität, Universitätsstr 1, 40225 Düsseldorf, Germany
| | - Peter Proksch
- Institut für Pharmazeutische Biologie, Heinrich-Heine-Universität, Universitätsstr 1, 40225 Düsseldorf, Germany
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7
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Hu JF, Peng J, Kazi AB, Kelly M, Hamann MT. Bromopyrrole Alkaloids from the Jamaican Sponge Didiscus Oxeata. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823405774309113] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three bromopyrrole alkaloids (1–3) were isolated from the acetone extracts of Didiscus oxeata during chemical and biological investigation of Caribbean and Indo-Pacific marine sponges. The structures were established by spectroscopic methods. Mukanadin D (3) was obtained for the first time as a naturally-occurring C11 bromopyrrole alkaloid.
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Affiliation(s)
- Jin-Feng Hu
- Department of Pharmacognosy and National Center for Natural Products Research (NCNPR), School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Jiangnan Peng
- Department of Pharmacognosy and National Center for Natural Products Research (NCNPR), School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Abul B. Kazi
- Department of Pharmacognosy and National Center for Natural Products Research (NCNPR), School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Michelle Kelly
- National Center for Aquatic Biodiversity and Biosecurity, National Institute of Water & Atmospheric Research (NIWA) Ltd, Newmarket, Auckland, New Zealand
| | - Mark T. Hamann
- Department of Pharmacognosy and National Center for Natural Products Research (NCNPR), School of Pharmacy, The University of Mississippi, University, MS 38677, USA
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8
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García PA, Valles E, Díez D, Castro MÁ. Marine Alkylpurines: A Promising Group of Bioactive Marine Natural Products. Mar Drugs 2018; 16:md16010006. [PMID: 29301246 PMCID: PMC5793054 DOI: 10.3390/md16010006] [Citation(s) in RCA: 12] [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: 11/30/2017] [Revised: 12/16/2017] [Accepted: 12/19/2017] [Indexed: 11/16/2022] Open
Abstract
Marine secondary metabolites with a purine motif in their structure are presented in this review. The alkylpurines are grouped according to the size of the alkyl substituents and their location on the purine ring. Aspects related to the marine source, chemical structure and biological properties are considered together with synthetic approaches towards the natural products and bioactive analogues. This review contributes to studies of structure–activity relationships for these metabolites and highlights the potential of the sea as a source of new lead compounds in diverse therapeutic fields.
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Affiliation(s)
- Pablo A García
- Department of Pharmaceutical Sciences, Medicinal Chemistry Section, Pharmacy Faculty, CIETUS, IBSAL, University of Salamanca, E-37007 Salamanca, Spain.
| | - Elena Valles
- Department of Pharmaceutical Sciences, Medicinal Chemistry Section, Pharmacy Faculty, CIETUS, IBSAL, University of Salamanca, E-37007 Salamanca, Spain.
| | - David Díez
- Department of Organic Chemistry, Faculty of Chemical Sciences, University of Salamanca, E-37008 Salamanca, Spain.
| | - María-Ángeles Castro
- Department of Pharmaceutical Sciences, Medicinal Chemistry Section, Pharmacy Faculty, CIETUS, IBSAL, University of Salamanca, E-37007 Salamanca, Spain.
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9
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Zhang H, Dong M, Chen J, Wang H, Tenney K, Crews P. Bioactive Secondary Metabolites from the Marine Sponge Genus Agelas. Mar Drugs 2017; 15:E351. [PMID: 29117128 PMCID: PMC5706041 DOI: 10.3390/md15110351] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/25/2017] [Accepted: 11/03/2017] [Indexed: 11/30/2022] Open
Abstract
The marine sponge genus Agelas comprises a rich reservoir of species and natural products with diverse chemical structures and biological properties with potential application in new drug development. This review for the first time summarized secondary metabolites from Agelas sponges discovered in the past 47 years together with their bioactive effects.
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Affiliation(s)
- Huawei Zhang
- Department of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Menglian Dong
- Department of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Jianwei Chen
- Department of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Hong Wang
- Department of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Karen Tenney
- Department of Chemistry & Biochemistry, University of California Santa Cruz, Santa Cruz 95064, CA, USA.
| | - Phillip Crews
- Department of Chemistry & Biochemistry, University of California Santa Cruz, Santa Cruz 95064, CA, USA.
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10
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Chu MJ, Tang XL, Qin GF, Sun YT, Li L, de Voogd NJ, Li PL, Li GQ. Pyrrole Derivatives and Diterpene Alkaloids from the South China Sea Sponge Agelas nakamurai. Chem Biodivers 2017; 14. [PMID: 28222487 DOI: 10.1002/cbdv.201600446] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 02/17/2017] [Indexed: 11/07/2022]
Abstract
Two pairs of new non-brominated racematic pyrrole derivatives, (±)-nakamurine D (1) and (±)-nakamurine E (2), two new diterpene alkaloids, isoagelasine C (16) and isoagelasidine B (21), together with 13 known pyrrole derivatives ((±)-3 - 15), five known diterpene alkaloids (17 - 20, 22) were isolated from the South China Sea sponge Agelas nakamurai. The racemic mixtures, compounds 1 - 4, were resolved into four pairs of enantiomers, (+)-1 and (-)-1, (+)-2 and (-)-2, (+)-3 and (-)-3, and (+)-4 and (-)-4, by chiral HPLC. The structures and absolute configurations were elucidated on the basis of comprehensive spectroscopic analyses, quantum chemical calculations, quantitative measurements of molar rotations, application of van't Hoff's principle of optical superposition, and comparison with the literature data. The NMR and MS data of compound 3 are reported for the first time, as the structure was listed in SciFinder Scholar with no associated reference. These non-brominated pyrrole derivatives were found in this species for the first time. Compound 18 showed valuable cytotoxicities against HL-60, K562, and HCT-116 cell lines with IC50 values of 12.4, 16.0, and 19.8 μm, respectively. Compounds 16 - 19, 21, and 22 showed potent antifungal activities against Candida albicans with MIC values ranging from 0.59 to 4.69 μg/ml. Compounds 16 - 19 exhibited moderate antibacterial activities against Proteusbacillus vulgaris (MIC values ranging from 9.38 to 18.75 μg/ml).
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Affiliation(s)
- Mei-Jun Chu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266235, P. R. China
| | - Xu-Li Tang
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266235, P. R. China
| | - Guo-Fei Qin
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266235, P. R. China
| | - Yan-Ting Sun
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266235, P. R. China
| | - Lei Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266235, P. R. China
| | - Nicole J de Voogd
- National Museum of Natural History, Leiden, 2300 RA, The Netherlands
| | - Ping-Lin Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266235, P. R. China
| | - Guo-Qiang Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, P. R. China
- Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao, 266235, P. R. China
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11
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Three new non-brominated pyrrole alkaloids from the South China Sea sponge Agelas nakamurai. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2017.01.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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He F, Mai LH, Gardères J, Hussain A, Erakovic Haber V, Bourguet-Kondracki ML. Major Antimicrobial Representatives from Marine Sponges and/or Their Associated Bacteria. BLUE BIOTECHNOLOGY 2017; 55:35-89. [DOI: 10.1007/978-3-319-51284-6_2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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13
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García P, Ramallo IA, Salazar MO, Furlan RLE. Chemical diversification of essential oils, evaluation of complex mixtures and identification of a xanthine oxidase inhibitor. RSC Adv 2016. [DOI: 10.1039/c6ra05373d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
A set of chemically engineered essential oils has been generated through chemical diversification by reaction with bromine, leading to the discovery of a new brominated xanthine oxidase inhibitor.
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Affiliation(s)
- P. García
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, CONICET-UNR)
- Ocampo y Esmeralda
- Rosario
- Argentina
| | - I. A. Ramallo
- Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, CONICET-UNR)
- Ocampo y Esmeralda
- Rosario
- Argentina
| | - M. O. Salazar
- Farmacognosia
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Rosario
- Argentina
| | - R. L. E. Furlan
- Farmacognosia
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Rosario
- Argentina
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14
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Abdjul DB, Yamazaki H, Kanno SI, Takahashi O, Kirikoshi R, Ukai K, Namikoshi M. Structures and Biological Evaluations of Agelasines Isolated from the Okinawan Marine Sponge Agelas nakamurai. JOURNAL OF NATURAL PRODUCTS 2015; 78:1428-1433. [PMID: 26083682 DOI: 10.1021/acs.jnatprod.5b00375] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Three new N-methyladenine-containing diterpenes, 2-oxoagelasines A (1) and F (2) and 10-hydro-9-hydroxyagelasine F (3), were isolated from the Okinawan marine sponge Agelas nakamurai Hoshino together with eight known agelasine derivatives, 2-oxoagelasine B (4), agelasines A (5), B (6), D (7), E (8), F (9), and G (10), and ageline B (11). The structures of 1-3 were assigned on the basis of their spectroscopic data and their comparison with those of the literature. Compounds 3 and 5-11 inhibited the growth of Mycobacterium smegmatis with inhibition zones of 10, 14, 15, 18, 14, 20, 12, and 12 mm at 20 μg/disc, respectively. All compounds were inactive (IC50 > 10 μM) against Huh-7 (hepatoma) and EJ-1 (bladder carcinoma) human cancer cell lines. Three 2-oxo derivatives (1, 2, and 4) exhibited markedly reduced biological activity against M. smegmatis. Moreover, compound 10 inhibited protein tyrosine phosphatase 1B (PTP1B) activity with an IC50 value of 15 μM.
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Affiliation(s)
- Delfly B Abdjul
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
| | - Hiroyuki Yamazaki
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
| | - Syu-ichi Kanno
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
| | - Ohgi Takahashi
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
| | - Ryota Kirikoshi
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
| | - Kazuyo Ukai
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
| | - Michio Namikoshi
- Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University, Sendai 981-8558, Japan
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15
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Peña J, Silveira-Dorta G, Moro RF, Garrido NM, Marcos IS, Sanz F, Díez D. Enantioselective synthesis of cis-decalins using organocatalysis and sulfonyl Nazarov reagents. Molecules 2015; 20:6409-18. [PMID: 25867826 PMCID: PMC6272541 DOI: 10.3390/molecules20046409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 11/16/2022] Open
Abstract
The first organocatalytic synthesis of cis-decalins using sulfonyl Nazarov reagents is reported. The Jørgensen's catalyst directs this highly enantioselective synthesis using different cyclohexenal derivatives.
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Affiliation(s)
- Javier Peña
- Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - Gastón Silveira-Dorta
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain.
| | - Rosalina F Moro
- Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - Narciso M Garrido
- Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - Isidro S Marcos
- Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - Francisca Sanz
- Servicio de Difracción de Rayos X, Plataforma Nucleus, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
| | - David Díez
- Departamento de Química Orgánica, Universidad de Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain.
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Bürki C, Bonjoch J, Bradshaw B, Villa G, Renaud P. Total Synthesis of Aignopsanes, A Class of Sesquiterpenes: (+)-Aignopsanoic Acid A, (−)-Methyl Aignopsanoate A, and (−)-Isoaignopsanoic A. Chemistry 2014; 21:395-401. [DOI: 10.1002/chem.201404766] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Indexed: 11/05/2022]
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Villa G, Bradshaw B, Bürki C, Bonjoch J, Renaud P. Synthesis of the all-cis-trimethyldecalin fragment of unusual terpenes by radical-mediated protonolysis of an alkylboron derivative. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.06.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Abstract
Marine sponges continue to attract wide attention from marine natural product chemists and pharmacologists alike due to their remarkable diversity of bioactive compounds. Since the early days of marine natural products research in the 1960s, sponges have notoriously yielded the largest number of new metabolites reported per year compared to any other plant or animal phylum known from the marine environment. This not only reflects the remarkable productivity of sponges with regard to biosynthesis and accumulation of structurally diverse compounds but also highlights the continued interest of marine natural product researchers in this fascinating group of marine invertebrates. Among the numerous classes of natural products reported from marine sponges over the years, alkaloids, peptides, and terpenoids have attracted particularly wide attention due to their unprecedented structural features as well as their pronounced pharmacological activities which make several of these metabolites interesting candidates for drug discovery. This chapter consequently highlights several important groups of sponge-derived alkaloids, peptides, and terpenoids and describes their biological and/or pharmacological properties.
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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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Zhang H, Conte MM, Huang XC, Khalil Z, Capon RJ. A search for BACE inhibitors reveals new biosynthetically related pyrrolidones, furanones and pyrroles from a southern Australian marine sponge, Ianthella sp. Org Biomol Chem 2012; 10:2656-63. [DOI: 10.1039/c2ob06747a] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Wischang D, Hartung J. Parameters for bromination of pyrroles in bromoperoxidase-catalyzed oxidations. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ramallo IA, Salazar MO, Mendez L, Furlan RLE. Chemically engineered extracts: source of bioactive compounds. Acc Chem Res 2011; 44:241-50. [PMID: 21355557 DOI: 10.1021/ar100106n] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Biological research and drug discovery critically depend on access to libraries of small molecules that have an affinity for biomacromolecules. By virtue of their sustained success as sources of lead compounds, natural products are recognized as "privileged" starting points in structural space for library development. Compared with synthetic compounds, natural products have distinguishing structural properties; indeed, researchers have begun to quantify and catalog the differences between the two classes of molecules. Measurable differences in the number of chiral centers, the degree of saturation, the presence of aromatic rings, and the number of the various heteroatoms are among the chief distinctions between natural and synthetic compounds. Natural products also include a significant proportion of recurring molecular scaffolds that are not present in currently marketed drugs: the bioactivity of these natural substructures has been refined over the long process of evolution. In this Account, we present our research aimed at preparing libraries of semisynthetic compounds, or chemically engineered extracts (CEEs), through chemical diversification of natural products mixtures. The approach relies on the power of numbers, that is, in the chemical alteration of a sizable fraction of the starting complex mixture. Major changes in composition can be achieved through the chemical transformation of reactive molecular fragments that are found in most natural products. If such fragments are common enough, their transformation represents an entry point for chemically altering a high proportion of the components of crude natural extracts. We have searched for common reactive fragments in the Dictionary of Natural Products (CRC Press) and identified several functional groups that are expected to be present in a large fraction of the components of an average natural crude extract. To date, we have used reactions that incorporate (i) nitrogen atoms through carbonyl groups, (ii) sulfur by transformation of -OH and amines, and (iii) bromine through double bonds and aromatic rings. The resulting CEEs had different composition and biomolecular properties than their natural progenitors. We isolated a semisynthetic β-glucosidase inhibitor from a CEE prepared by reaction with benzenesulfonyl chloride, an antifungal pyrazole from a CEE prepared by reaction with hydrazine, and an acetylcholinesterase inhibitor from a CEE prepared through bromination. Our results illustrate how biological activity can be generated through chemical diversification of natural product mixtures. Moreover, the level of control that can be asserted in the process by judicious design and experimental choices underscores the potential for further development of CEEs in both basic research and drug discovery.
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Affiliation(s)
- I. Ayelen Ramallo
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and Instituto de Química de Rosario (Conicet-UNR), Suipacha 531, 2000 Rosario, Argentina
| | - Mario O. Salazar
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and Instituto de Química de Rosario (Conicet-UNR), Suipacha 531, 2000 Rosario, Argentina
| | - Luciana Mendez
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and Instituto de Química de Rosario (Conicet-UNR), Suipacha 531, 2000 Rosario, Argentina
| | - Ricardo L. E. Furlan
- Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and Instituto de Química de Rosario (Conicet-UNR), Suipacha 531, 2000 Rosario, Argentina
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Méndez L, Salazar MO, Ramallo IA, Furlan RLE. Brominated extracts as source of bioactive compounds. ACS COMBINATORIAL SCIENCE 2011; 13:200-4. [PMID: 21395346 DOI: 10.1021/co100073k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The chemical composition and the biomolecular properties of a crude plant extract were altered through bromination leading to the discovery of an acetylcholinesterase inhibitor.
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24
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Roggen H, Charnock C, Burman R, Felth J, Larsson R, Bohlin L, Gundersen LL. Antimicrobial and antineoplastic activities of agelasine analogs modified in the purine 2-position. Arch Pharm (Weinheim) 2010; 344:50-5. [PMID: 21213351 DOI: 10.1002/ardp.201000148] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 06/21/2010] [Accepted: 06/23/2010] [Indexed: 11/06/2022]
Abstract
Agelasines are 7,9-dialkylpurinium salts found in marine sponges (Agelas sp.), which display a variety of antimicrobial and cytotoxic effects. We have synthesized simplified agelasine analogs modified in the purine 2-position and examined their antimicrobial and anticancer activities. The compounds were screened against Staphylococcus aureus, Escherichia coli, Mycobacterium tuberculosis, Candida krusei, and Candida albicans, protozoa causing tropical diseases (Plasmodium falciparum, Leishmania infantum, Trypanosoma cruzi, and Trypanosoma brucei), a panel of human cancer cell lines (U-937 GTB, RPMI 8226/s, CEM/s, and ACHN) as well as VERO and/or MRC-5 cells. The results indicate that the introduction of a methyl group in the purine 2-position is beneficial for antimycobacterial and antiprotozoal activity, and that amino groups may enhance activity against several cancer cell lines.
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Affiliation(s)
- Heidi Roggen
- Department of Chemistry, University of Oslo, Blindern, Oslo, Norway
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25
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Calculated tautomeric equilibria and X-ray structures of 2-substituted N-methoxy-9-methyl-9H-purin-6-amines. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0850-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Hertiani T, Edrada-Ebel R, Ortlepp S, van Soest RW, de Voogd NJ, Wray V, Hentschel U, Kozytska S, Müller WE, Proksch P. From anti-fouling to biofilm inhibition: New cytotoxic secondary metabolites from two Indonesian Agelas sponges. Bioorg Med Chem 2010; 18:1297-311. [DOI: 10.1016/j.bmc.2009.12.028] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2009] [Revised: 12/07/2009] [Accepted: 12/08/2009] [Indexed: 11/29/2022]
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27
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Calcul L, Tenney K, Ratnam J, McKerrow JH, Crews P. Structural Variations to the 9-N-Methyladeninium Diterpenoid Hybrid Commonly Isolated from Agelas Sponges. Aust J Chem 2010. [DOI: 10.1071/ch10036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Four novel 9-N-methyladeninium diterpenoids, agelasine M (3), 2-oxo-agelasine B (4), gelasine A (5), and gelasine B (6) accompanied by the known-agelasine B (1) and F (2) were isolated from the marine sponge Agelas sp. collected in Papua New Guinea. Compounds 3–6 represent higher unsaturated 9-N-methyladeninium bicyclic diterpenoid derivatives including 5 and 6 as unusual norditerpenoid-agelasines. Their structures were elucidated through detailed physical data analyses and comparison with literature properties. All pure compounds were evaluated for inhibitory activity against Trypanosoma brucei as well as for cytotoxicity against Jurkat cells.
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Abstract
Agelasines, asmarines and related compounds are natural products with a hybrid terpene-purine structure isolated from numerous genera of sponges (Agela sp., Raspailia sp.). Some agelasine analogs and related structures have displayed high general toxicity towards protozoa, and have exhibited broad-spectrum antimicrobial activity against a variety of species, including Mycobacterium tuberculosis, and also an important cytotoxic activity against several cancer cell lines, including multidrug-resistant ones. Of particular interest in this context are the asmarines (tetrahydro[1,4]diazepino[1,2,3-g,h]purines), which have shown potent antiproliferative activity against several types of human cancer cell lines. This review summarizes the sources of isolation, chemistry and bioactivity of marine alkylpurines and their bioactive derivatives.
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Du L, Yang X, Zhu T, Wang F, Xiao X, Park H, Gu Q. Diketopiperazine alkaloids from a deep ocean sediment derived fungus Penicillium sp. Chem Pharm Bull (Tokyo) 2009; 57:873-6. [PMID: 19652417 DOI: 10.1248/cpb.57.873] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Five new diketopiperazine alkaloids, brevicompanines D-H (3-7), together with two known analogs, allo-brevicompanine B (1) and fructigenine B (2), were isolated from a deep ocean sediment derived fungus Penicillium sp. Their structures were established by spectroscopic methods including 2D NMR and chiral HPLC analysis. Compounds 4 and 7 inhibited lipopolysaccharide (LPS)-induced nitric oxide production in BV2 microglial cells.
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Affiliation(s)
- Lin Du
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Institute of Marine Drugs and Food, Ocean University of China, Qingdao, P.R. China
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Screening of agelasine D and analogs for inhibitory activity against pathogenic protozoa; identification of hits for visceral leishmaniasis and Chagas disease. Molecules 2009; 14:279-88. [PMID: 19136916 PMCID: PMC6253839 DOI: 10.3390/molecules14010279] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Revised: 12/29/2008] [Accepted: 01/04/2009] [Indexed: 11/17/2022] Open
Abstract
There is an urgent need for novel and improved drugs against several tropical diseases caused by protozoa. The marine sponge (Agelas sp.) metabolite agelasine D, as well as other agelasine analogs and related structures were screened for inhibitory activity against Plasmodium falciparum, Leishmania infantum, Trypanosoma brucei and T. cruzi, as well as for toxicity against MRC-5 fibroblast cells. Many compounds displayed high general toxicity towards both the protozoa and MRC-5 cells. However, two compounds exhibited more selective inhibitory activity against L. infantum (IC50 <0.5 μg/mL) while two others displayed IC50 <1 μg/mL against T. cruzi in combination with relatively low toxicity against MRC-5 cells. According to criteria set up by the WHO Special Programme for Research & Training in Tropical Diseases (TDR), these compounds could be classified as hits for leishmaniasis and for Chagas disease, respectively. Identification of the hits as well as other SAR data from this initial screening will be valuable for design of more potent and selective potential drugs against these neglected tropical diseases.
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Roggen H, Gundersen LL. Synthetic Studies Directed towards Agelasine Analogs - Synthesis, Tautomerism, and Alkylation of 2-SubstitutedN-Methoxy-9-methyl-9H-purin-6-amines. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800627] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Proszenyák A, Charnock C, Hedner E, Larsson R, Bohlin L, Gundersen LL. Synthesis, antimicrobial and antineoplastic activities for agelasine and agelasimine analogs with a beta-cyclocitral derived substituent. Arch Pharm (Weinheim) 2008; 340:625-34. [PMID: 17994607 DOI: 10.1002/ardp.200700137] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Agelasines and agelasimines are antimicrobial and cytotoxic purine derivatives isolated from marine sponges (Agelas sp.). We have synthesized structurally simplified analogs of these natural products starting from beta-cyclocitral. The novel compounds were found to be strong inhibitors of a wide variety of pathogenic microorganisms (incl. Mycobacterium tuberculosis) as well as cancer cell lines. The biological activities were generally in the same range as those previously found for the structurally more complex agelasines and agelasimines isolated in small amounts from natural sources. We also report for the first time that agelasine and agelasimine analogs inhibit growth of protozoa (Acanthamoeba castellanii and Acanthamoeba polyphaga). Acanthamoeba keratitis is an increasingly common and severe corneal infection, closely associated with contact lens wear.
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Sjögren M, Dahlström M, Hedner E, Jonsson PR, Vik A, Gundersen LL, Bohlin L. Antifouling activity of the sponge metabolite agelasine D and synthesised analogs on Balanus improvisus. BIOFOULING 2008; 24:251-258. [PMID: 18409112 DOI: 10.1080/08927010802072753] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This study reports a screening study for antifouling (AF) activity of the natural compound agelasine D isolated from marine sponges of the genus Agelas and 20 synthesised analogs of agelasines and agelasimines. Agelasine D, together with two of the analogs, ie AV1003A and AKB695, displayed a strong inhibitory effect on settlement of Balanus improvisus cypris larvae. Agelasine D had an EC50 value of 0.11 microM while the two analogs AV1033A and AKB695 had EC50 values of 0.23 and 0.3 microM, respectively. None of these three compounds affected larval mortality as was the case with several of the analogs tested. Moreover, the effect of AV1033A and AKB695 was reversible. When cyprids after 24 h exposure to the compounds were transferred to fresh seawater, the settlement frequency compared with the controls was completely recovered. The properties of the agelasine D analogs AV1003A and AKB695 make them highly attractive candidates as AF agents in future marine coatings.
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Affiliation(s)
- Martin Sjögren
- Division of Pharmacognosy, Department of Medicinal Chemistry, Biomedical Centre, Uppsala University, Uppsala, Sweden.
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Vik A, Hedner E, Charnock C, Tangen LW, Samuelsen Ø, Larsson R, Bohlin L, Gundersen LL. Antimicrobial and cytotoxic activity of agelasine and agelasimine analogs. Bioorg Med Chem 2007; 15:4016-37. [PMID: 17442577 DOI: 10.1016/j.bmc.2007.03.086] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Revised: 03/23/2007] [Accepted: 03/30/2007] [Indexed: 10/23/2022]
Abstract
Agelasine and agelasimine derivatives with substantially less complicated terpenoid side chains compared to the naturally occurring compounds have been synthesized and their ability to inhibit growth of microorganisms and cancer cells has been studied. Compounds with excellent activity against cancer cell lines (MIC ca. 1 microM for the most potent compounds), including a drug resistant renal cell line, have been identified. Most compounds studied also exhibited broad spectrum antimicrobial activity including activity against Mycobacterium tuberculosis.
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Affiliation(s)
- Anders Vik
- Department of Chemistry, University of Oslo, Blindern, N-0315 Oslo, Norway
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Erpenbeck D, Breeuwer JAJ, Parra-Velandia FJ, van Soest RWM. Speculation with spiculation?—Three independent gene fragments and biochemical characters versus morphology in demosponge higher classification. Mol Phylogenet Evol 2006; 38:293-305. [PMID: 16325431 DOI: 10.1016/j.ympev.2005.11.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Revised: 09/22/2005] [Accepted: 10/04/2005] [Indexed: 11/28/2022]
Abstract
Demosponge higher-level systematics is currently a subject of major changes due to the simplicity and paucity of complex morphological characters. Still, sponge classification is primarily based on morphological features. The systematics of the demosponge order Agelasida has been exceptionally problematic in the past. Here, we present the first molecular phylogenetic analysis based on three partially independent genes in demosponges in combination with a comprehensive search for biochemical synapomorphies to indicate their phylogenetic relationships. We show how sponges with fundamentally different skeletons can be in fact closely related and discuss examples of the misleading nature of morphological systematics in sponges.
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Affiliation(s)
- D Erpenbeck
- IBED, University of Amsterdam, P.O. Box 94766, 1090GT Amsterdam, The Netherlands.
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Erpenbeck D, van Soest RW. A survey for biochemical synapomorphies to reveal phylogenetic relationships of halichondrid demosponges (Metazoa: Porifera). BIOCHEM SYST ECOL 2005. [DOI: 10.1016/j.bse.2004.12.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gossauer A. Monopyrrolic natural compounds including tetramic acid derivatives. FORTSCHRITTE DER CHEMIE ORGANISCHER NATURSTOFFE = PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS. PROGRES DANS LA CHIMIE DES SUBSTANCES ORGANIQUES NATURELLES 2003; 86:1-188. [PMID: 12899123 DOI: 10.1007/978-3-7091-6029-9_1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Albert Gossauer
- Department of Chemistry, University of Fribourg, Fribourg, Switzerland
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Chapter 3 Naturally occurring halogenated pyrroles and Indoles. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0959-6380(03)80005-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Laus G. Biological activities of natural halogen compounds. BIOACTIVE NATURAL PRODUCTS (PART F) 2001. [DOI: 10.1016/s1572-5995(01)80022-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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41
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Bonjoch J, Cuesta J, Dı́az S, González A. Total synthesis of (±)-nakamurol-A and its 13-epimer: tentative assignment of the C-13 relative configuration. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00885-6] [Citation(s) in RCA: 6] [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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42
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First stereoselective synthesis of (4aS,5R)-4,4a,5,6,7,8-hexahydro-4a,5-dimethyl-2(3H)-naphthalenone. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0957-4166(99)00349-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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