1
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Lima E, Medeiros J. Marine Organisms as Alkaloid Biosynthesizers of Potential Anti-Alzheimer Agents. Mar Drugs 2022; 20:75. [PMID: 35049930 PMCID: PMC8780771 DOI: 10.3390/md20010075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 01/11/2022] [Accepted: 01/11/2022] [Indexed: 12/12/2022] Open
Abstract
The incidence of neurodegenerative diseases, such as Alzheimer's disease (AD), increases continuously demanding the urgent development of anti-Alzheimer's agents. Marine organisms (MO) have to create their own defenses due to the adverse environment where they live and so synthesize several classes of compounds, such as akaloids, to defend themselves. Therefore, the identification of marine natural products with neuroprotective effects is a necessity. Being that AD is not only a genetic but also an environmental complex disease, a treatment for AD remains to discover. As the major clinical indications (CI) of AD are extracellular plaques formed by β-amyloid (Aβ) protein, intracellular neurofibrillary tangles (NFTs) formed by hyper phosphorylated τ-protein, uncommon inflammatory response and neuron apoptosis and death caused by oxidative stress, alkaloids that may decrease CI, might be used against AD. Most of the alkalolids with those properties are derivatives of the amino acid tryptophan mainly with a planar indole scaffold. Certainly, alkaloids targeting more than one CI, multitarget-directed ligands (MTDL), have the potential to become a lead in AD treatment. Alkaloids to have a maximum of activity against CI, should be planar and contain halogens and amine quaternization.
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Affiliation(s)
- Elisabete Lima
- Faculty of Science and Technology (FCT), Institute of Agricultural and Environmental Research and Technology (IITAA), University of Azores, 9500-321 Ponta Delgada, São Miguel, Açores, Portugal;
| | - Jorge Medeiros
- Faculty of Science and Technology (FCT), Biotechnology Centre of Azores (CBA), University of Azores, 9500-321 Ponta Delgada, São Miguel, Açores, Portugal
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2
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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. The marine sponges of the genus Agelas, are unique and yet under-investigated pools for discovery of natural products with fabulous molecular diversity and myriad interesting biological activities.![]()
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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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3
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Voser TM, Campbell MD, Carroll AR. How different are marine microbial natural products compared to their terrestrial counterparts? Nat Prod Rep 2021; 39:7-19. [PMID: 34651634 DOI: 10.1039/d1np00051a] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Covering: 1877 to 2020A key challenge in natural products research is the selection of biodiversity to yield novel chemistry. Recently, marine microorganisms have become a preferred source. But how novel are marine microorganism natural products compared to those reported from terrestrial microbes? Cluster analysis of chemical fingerprints and molecular scaffold analysis of 55 817 compounds reported from marine and terrestrial microorganisms, and marine macro-organisms showed that 76.7% of the compounds isolated from marine microorganisms are closely related to compounds isolated from terrestrial microorganisms. Only 14.3% of marine microorganism natural products are unique when marine macro-organism natural products are also considered. Studies targeting marine specific and understudied microbial phyla result in a higher likelihood of finding marine specific compounds, whereas the depth and geographic location of microorganism collection have little influence. We recommend marine targeted strain isolation, incorporating early use of genomic sequencing to guide strain selection, innovation in culture media and cultivation techniques and the application of cheminformatics tools to focus on unique natural product diversity, rather than the dereplication of known compounds.
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Affiliation(s)
- Tanja M Voser
- School of Environment and Science, Griffith University, Gold Coast, Australia. .,Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.
| | - Max D Campbell
- School of Environment and Science, Griffith University, Gold Coast, Australia. .,Australian Rivers Institute-Coasts and Estuaries, Griffith University, Nathan, Australia.
| | - Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. .,Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.
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4
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Miguel-Gordo M, Gegunde S, Jennings LK, Genta-Jouve G, Calabro K, Alfonso A, Botana LM, Thomas OP. Futunamine, a Pyrrole-Imidazole Alkaloid from the Sponge Stylissa aff. carteri Collected off the Futuna Islands. JOURNAL OF NATURAL PRODUCTS 2020; 83:2299-2304. [PMID: 32628481 DOI: 10.1021/acs.jnatprod.0c00223] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The chemical investigation of the sponge Stylissa aff. carteri collected around Futuna Islands in the Pacific Ocean led to the isolation of three new dimeric pyrrole 2-aminoimidazole alkaloids (PIAs). Futunamine (1) features an unprecedented pyrrolo[1,2-c]imidazole core, while two other new dimeric PIAs were identified as analogues of palau'amine. Together with other known PIAs isolated from this species, they were shown to exhibit anti-inflammatory and neuroprotective activities.
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Affiliation(s)
- Maria Miguel-Gordo
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, H91 TK33 Galway, Ireland
| | - Sandra Gegunde
- Departamento de Farmacología, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Laurence K Jennings
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, H91 TK33 Galway, Ireland
| | - Grégory Genta-Jouve
- Laboratoire de Chimie-Toxicologie Analytique et Cellulaire (C-TAC) UMR CNRS 8038 CiTCoM, Université Paris-Descartes, 4, Avenue de l'Observatoire, 75006 Paris, France
- Laboratoire Ecologie, Evolution, Interactions des Systèmes Amazoniens (LEEISA), USR 3456, Université De Guyane, CNRS Guyane, 275 Route de Montabo, 97334 Cayenne, French Guiana
| | - Kevin Calabro
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, H91 TK33 Galway, Ireland
| | - Amparo Alfonso
- Departamento de Farmacología, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Luis M Botana
- Departamento de Farmacología, Facultad de Veterinaria, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Olivier P Thomas
- Marine Biodiscovery, School of Chemistry and Ryan Institute, National University of Ireland Galway (NUI Galway), University Road, H91 TK33 Galway, Ireland
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5
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Fang S, Yu H, Yang X, Li J, Shao L. Nickel‐Catalyzed Construction of 2,4‐Disubstituted Imidazoles
via
C–C Coupling and C−N Condensation Cascade Reactions. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900096] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shengyang Fang
- School of PharmacyFudan University 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong Shanghai 201203 People's Republic of China
| | - Haihua Yu
- School of PharmacyFudan University 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong Shanghai 201203 People's Republic of China
- Suzhou Precision Imaging Technology Co. LtdJiangsu Advanced Materials Industrial Park 18 Fuyu Road, Haiyu Town Changshu City, Jiangsu Province 215522 People's Republic of China
| | - Xicheng Yang
- School of PharmacyFudan University 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong Shanghai 201203 People's Republic of China
| | - Jianqi Li
- Novel Technology Center of Pharmaceutical Chemistry, Shanghai Institute of Pharmaceutical IndustryChina State Institute of Pharmaceutical Industry 285 Gebaini Road Shanghai 201203 People's Republic of China
| | - Liming Shao
- School of PharmacyFudan University 826 Zhangheng Road, Zhangjiang Hi-tech Park, Pudong Shanghai 201203 People's Republic of China
- State Key Laboratory of Medical NeurobiologyFudan University 138 Yixueyuan Road Shanghai 200032 People's Republic of China
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6
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Sun YT, Lin B, Li SG, Liu M, Zhou YJ, Xu Y, Hua HM, Lin HW. New bromopyrrole alkaloids from the marine sponge Agelas sp. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.03.078] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Tanaka N, Kusama T, Kashiwada Y, Kobayashi J. Bromopyrrole Alkaloids from Okinawan Marine Sponges Agelas spp. Chem Pharm Bull (Tokyo) 2017; 64:691-4. [PMID: 27373625 DOI: 10.1248/cpb.c16-00245] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In our continuing study for structurally and biogenetically interesting natural products from marine organisms, Okinawan marine sponges Agelas spp. were investigated, resulting in the isolation of 18 unique alkaloids including five dimeric bromopyrrole alkaloids (1-5), ten monomeric bromopyrrole alkaloids (6-15), and three conjugates of monomeric bromopyrrole alkaloid and hydroxykynurenine (16-18). In this mini-review, the isolation, structure elucidation, and antimicrobial activities of these alkaloids are summarized.
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Affiliation(s)
- Naonobu Tanaka
- Graduate School of Pharmaceutical Sciences, Hokkaido University
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8
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Lindel T. Chemistry and Biology of the Pyrrole–Imidazole Alkaloids. THE ALKALOIDS: CHEMISTRY AND BIOLOGY 2017; 77:117-219. [DOI: 10.1016/bs.alkal.2016.12.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Muñoz J, Köck M. Hybrid Pyrrole-Imidazole Alkaloids from the Sponge Agelas sceptrum. JOURNAL OF NATURAL PRODUCTS 2016; 79:434-437. [PMID: 26872204 DOI: 10.1021/acs.jnatprod.5b00265] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A chemical investigation of the tropical sponge Agelas sceptrum from Plana Cays (Bahamas) led to the isolation of two hybrid pyrrole-imidazole alkaloids (PIAs), 15'-oxoadenosceptrin (1) and decarboxyagelamadin C (2). Herein, we report their challenging structure elucidation established by NMR and ECD spectroscopy. 15'-Oxoadenosceptrin (1) shows sceptrin merged with an adenine moiety, not yet encountered in the PIA family, whereas decarboxyagelamadin C (2) is a close derivative of agelamadins C to E recently isolated from an Agelas sp. from Okinawa.
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Affiliation(s)
- Julie Muñoz
- 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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10
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Nabergoj D, Vrbek S, Zidar N, Tomašić T, Kikelj D, Mašič LP, Muller CD. Synthetic analogues of marine alkaloid clathrodin differently induce phosphatidylserine exposure in monocytic cancer cells then in cancer stem cell lines. MEDCHEMCOMM 2016. [DOI: 10.1039/c6md00163g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Activation of apoptosis in cancer cells could stop the development of several cancers.
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Affiliation(s)
- Dominik Nabergoj
- Faculty of Pharmacy
- University of Ljubljana
- 1000 Ljubljana
- Slovenia
- Laboratoire d'Innovation Thérapeutique
| | - Sanja Vrbek
- Faculty of Pharmacy
- University of Ljubljana
- 1000 Ljubljana
- Slovenia
- Laboratoire d'Innovation Thérapeutique
| | - Nace Zidar
- Faculty of Pharmacy
- University of Ljubljana
- 1000 Ljubljana
- Slovenia
| | - Tihomir Tomašić
- Faculty of Pharmacy
- University of Ljubljana
- 1000 Ljubljana
- Slovenia
| | - Danijel Kikelj
- Faculty of Pharmacy
- University of Ljubljana
- 1000 Ljubljana
- Slovenia
| | | | - Christian D. Muller
- Laboratoire d'Innovation Thérapeutique
- UMR 7200
- Faculté de Pharmacie
- Université de Strasbourg
- Illkirch
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11
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Agelamadin F and tauroacidin E, bromopyrrole alkaloids from an Okinawan marine sponge Agelas sp. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.114] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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12
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Natural products from marine organisms with neuroprotective activity in the experimental models of Alzheimer's disease, Parkinson's disease and ischemic brain stroke: their molecular targets and action mechanisms. Arch Pharm Res 2014; 38:139-70. [PMID: 25348867 DOI: 10.1007/s12272-014-0503-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 10/14/2014] [Indexed: 12/20/2022]
Abstract
Continuous increases in the incidence of neurodegenerative diseases, such as Alzheimer's disease (AD), Parkinson's disease (PD), and brain stroke demand the urgent development of therapeutics. Marine organisms are well-known producers of natural products with diverse structures and pharmacological activities. Therefore, researchers have endeavored to identify marine natural products with neuroprotective effects. In this regard, this review summarizes therapeutic targets for AD, PD, and ischemic brain stroke and marine natural products with pharmacological activities on the targets according to taxonomies of marine organisms. Furthermore, several marine natural products on the clinical trials for the treatment of neurological disorders are discussed.
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13
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Kusama T, Tanaka N, Sakai K, Gonoi T, Fromont J, Kashiwada Y, Kobayashi J. Agelamadins C-E, bromopyrrole alkaloids comprising oroidin and 3-hydroxykynurenine from a marine sponge Agelas sp. Org Lett 2014; 16:5176-9. [PMID: 25247626 DOI: 10.1021/ol502528m] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Three structurally unique bromopyrrole alkaloids, agelamadins C-E (1-3), were isolated from a marine sponge Agelas sp. Agelamadin C (1) possesses a hybrid structure of oroidin and 3-hydroxykynurenine connected through a dihydro-1,4-oxazine moiety. Agelamadins D (2) and E (3) are a C-9/C-10 diastereomer and a 10-epimer of 1, respectively. The structures of 1-3 were elucidated on the basis of spectroscopic analysis as well as application of a PGME method and a TDDFT ECD calculation. Antimicrobial activity of 1-3 was evaluated.
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Affiliation(s)
- Taishi Kusama
- Graduate School of Pharmaceutical Sciences, Hokkaido University , Sapporo 060-0812, Japan
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14
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Kusama T, Tanaka N, Sakai K, Gonoi T, Fromont J, Kashiwada Y, Kobayashi J. Agelamadins A and B, Dimeric Bromopyrrole Alkaloids from a Marine Sponge Agelas sp. Org Lett 2014; 16:3916-8. [DOI: 10.1021/ol501664b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Taishi Kusama
- Graduate
School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Naonobu Tanaka
- Graduate
School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
- Graduate
School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
| | - Kanae Sakai
- Mycology
Research Center, Chiba University, Chiba 260-8673, Japan
| | - Tohru Gonoi
- Mycology
Research Center, Chiba University, Chiba 260-8673, Japan
| | - Jane Fromont
- Western Australian Museum, Locked
Bag 49, Welshpool DC, Washington 6986, Australia
| | - Yoshiki Kashiwada
- Graduate
School of Pharmaceutical Sciences, The University of Tokushima, Tokushima 770-8505, Japan
| | - Jun’ichi Kobayashi
- Graduate
School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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15
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Žula A, Kikelj D, Ilaš J. A convenient strategy for synthesizing the Agelas alkaloids clathrodin, oroidin, and hymenidin and their (un)saturated linker analogs. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Wang X, Morinaka B, Molinski TF. Structures and solution conformational dynamics of stylissamides G and H from the Bahamian sponge Stylissa caribica. JOURNAL OF NATURAL PRODUCTS 2014; 77:625-30. [PMID: 24576291 PMCID: PMC3993948 DOI: 10.1021/np400891s] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Two new peptides, stylissamides G and H, were isolated from extracts of a sample of Stylissa caribica collected in deep waters of the Caribbean Sea. A single sample of S. caribica among a collection of 10 samples that were examined by LC-MS appeared to be a different chemotype from the others in that it lacked the familiar pyrrole-2-aminoimidazole alkaloids, stevensine and oroidin, and contained peptides of the stylissamide class. The structures of the title compounds were solved by integrated analysis of the MS and NMR spectra and chemical degradation. The solution conformation of stylissamide G was briefly examined by electronic circular dichroism and temperature-dependent (1)H NMR chemical shifts of amide NH signals, which supported a conformationally rigid macrocycle.
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Affiliation(s)
- Xiao Wang
- Department of Chemistry and Biochemistry and Skaggs School of
Pharmacy and Pharmaceutical
Sciences, University of California, San
Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Brandon
I. Morinaka
- Department of Chemistry and Biochemistry and Skaggs School of
Pharmacy and Pharmaceutical
Sciences, University of California, San
Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Tadeusz F. Molinski
- Department of Chemistry and Biochemistry and Skaggs School of
Pharmacy and Pharmaceutical
Sciences, University of California, San
Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
- Tel: +1 (858) 534-7115. Fax: +1 (858) 822-0386. E-mail:
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17
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Synthesis and anticancer activity of focused compound libraries from the natural product lead, oroidin. Bioorg Med Chem 2014; 22:1690-9. [PMID: 24508308 DOI: 10.1016/j.bmc.2014.01.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/07/2014] [Accepted: 01/15/2014] [Indexed: 01/23/2023]
Abstract
Oroidin (1), (E)-N-(3-(2-amino-1H-imidazol-4-yl)allyl)-4,5-dibromo-1H-pyrrole-2-carboxamide, is a pyrrole alkaloid isolated from the marine sponge Agelas oroides. Routine screening in a panel of twelve cancer cell lines revealed 1 to be poorly cytotoxic with the 50% growth inhibition concentration (GI50) of 42 μM in MCF-7 (breast) cells and 24 μM in A2780 (ovarian) cells and >50 μM in all other cell lines tested. The development of eight focused libraries comprising thirty compounds total identified N-(biphenyl-4-ylmethyl)-1H-pyrrole-2-carboxamide (4l), N-benzyl-4,5-dibromo-1H-pyrrole-2-carboxamide (5a) and N-(biphenyl-4-ylmethyl)-4,5-dibromo-1H-pyrrole-2-carboxamide (5l) as potent inhibitors of cell growth in our panel of cell lines. Of these compounds GI50 values of <5 μM were observed with 4l against HT29 (colon) and SW480 (colon); 5a against HT29; and 5l against HT29, SW480, MCF-7, A431 (skin), Du145 (prostate), BE2-C (neuroblastoma) and MIA (pancreas) cell lines. As a cancer class, colon cancer appears to be more sensitive to the oroidin series of compounds, with analogue 5l being the most active.
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18
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Iwai T, Kubota T, Fromont J, Kobayashi J. Nagelamide I and 2,2′-Didebromonagelamide B, New Dimeric Bromopyrrole–Imidazole Alkaloids from a Marine Sponge Agelas sp. Chem Pharm Bull (Tokyo) 2014; 62:213-6. [DOI: 10.1248/cpb.c13-00821] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Takahiro Iwai
- Graduate School of Pharmaceutical Sciences, Hokkaido University
| | - Takaaki Kubota
- Graduate School of Pharmaceutical Sciences, Hokkaido University
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19
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Han S, Siegel DS, Morrison KC, Hergenrother PJ, Movassaghi M. Synthesis and anticancer activity of all known (-)-agelastatin alkaloids. J Org Chem 2013; 78:11970-84. [PMID: 24152243 PMCID: PMC3920459 DOI: 10.1021/jo4020112] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The full details of our enantioselective total syntheses of (-)-agelastatins A-F (1-6), the evolution of a new methodology for synthesis of substituted azaheterocycles, and the first side-by-side evaluation of all known (-)-agelastatin alkaloids against nine human cancer cell lines are described. Our concise synthesis of these alkaloids exploits the intrinsic chemistry of plausible biosynthetic precursors and capitalizes on a late-stage synthesis of the C-ring. The critical copper-mediated cross-coupling reaction was expanded to include guanidine-based systems, offering a versatile preparation of substituted imidazoles. The direct comparison of the anticancer activity of all naturally occurring (-)-agelastatins in addition to eight advanced synthetic intermediates enabled a systematic analysis of the structure-activity relationship within the natural series. Significantly, (-)-agelastatin A (1) is highly potent against six blood cancer cell lines (20-190 nM) without affecting normal red blood cells (>333 μM). (-)-Agelastatin A (1) and (-)-agelastatin D (4), the two most potent members of this family, induce dose-dependent apoptosis and arrest cells in the G2/M-phase of the cell cycle; however, using confocal microscopy, we have determined that neither alkaloid affects tubulin dynamics within cells.
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Affiliation(s)
- Sunkyu Han
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Dustin S. Siegel
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Karen C. Morrison
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Paul J. Hergenrother
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Mohammad Movassaghi
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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20
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Tanaka N, Kusama T, Takahashi-Nakaguchi A, Gonoi T, Fromont J, Kobayashi J. Nagelamides U–W, bromopyrrole alkaloids from a marine sponge Agelas sp. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Tanaka N, Kusama T, Takahashi-Nakaguchi A, Gonoi T, Fromont J, Kobayashi J. Nagelamides X-Z, dimeric bromopyrrole alkaloids from a marine sponge Agelas sp. Org Lett 2013; 15:3262-5. [PMID: 23767821 DOI: 10.1021/ol401291n] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Three new dimeric bromopyrrole alkaloids, nagelamides X-Z (1-3), were isolated from a marine sponge Agelas sp. Nagelamides X (1) and Y (2) possess a novel tricyclic skeleton consisting of spiro-bonded tetrahydrobenzaminoimidazole and aminoimidazolidine moieties. Nagelamide Z (3) is the first dimeric bromopyrrole alkaloid involving the C-8 position in dimerization. The structures of 1-3 were elucidated on the basis of spectroscopic data. Nagelamides X-Z (1-3) exhibited antimicrobial activity.
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Affiliation(s)
- Naonobu Tanaka
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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Lejeune C, Tian H, Appenzeller J, Ermolenko L, Martin MT, Al-Mourabit A. Unprecedented biomimetic homodimerization of oroidin and clathrodin marine metabolites in the presence of HMPA or phosphonate salt tweezers. JOURNAL OF NATURAL PRODUCTS 2013; 76:903-908. [PMID: 23654209 DOI: 10.1021/np400048r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The first biomimetic homodimerization of oroidin and clathrodin was effected in the presence HMPA and diphosphonate salts, strong guanidinium and amide chelating agents. The intermolecular associations probably interfere with the entropically and kinetically favored intramolecular cyclizations. Use of oroidin·(1)/2HCl salt or clathrodin·(1)/2HCl was indicative in the presence of the ambident nucleophilic and electrophilic tautomers of the 2-aminoimidazolic oroidin and clathrodin precursors. Surprisingly, the homodimerization of oroidin led to the nagelamide D skeleton, while the homodimerization of clathrodin gave the benzene para-symmetrical structure 19. The common process was rationalized from tautomeric precursors I and III.
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Affiliation(s)
- Clarisse Lejeune
- Institut de Chimie des Substances Naturelles, UPR 2301, Centre de Recherches de Gif-sur-Yvette, Avenue de la Terrasse, Gif-sur-Yvette, France
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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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Rasapalli S, Kumbam V, Dhawane AN, Golen JA, Lovely CJ, Rheingold AL. Total syntheses of oroidin, hymenidin and clathrodin. Org Biomol Chem 2013; 11:4133-7. [DOI: 10.1039/c3ob40668g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Stout EP, Wang YG, Romo D, Molinski TF. Pyrrole aminoimidazole alkaloid metabiosynthesis with marine sponges Agelas conifera and Stylissa caribica. Angew Chem Int Ed Engl 2012; 51:4877-81. [PMID: 22473581 PMCID: PMC3917718 DOI: 10.1002/anie.201108119] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 02/03/2012] [Indexed: 11/11/2022]
Abstract
Game-SET-match: Pyrrole aminoimidazole alkaloids (PAIs) are metabiosynthesized from chlorinated analogues of oroidin by cell-free enzyme preparations from PAI-producing sponges. Evidence and implications for the biosynthesis of PAIs include putative single-electron transfers (SETs) that promote C-C bond-forming reactions of precursors.
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Affiliation(s)
- E. Paige Stout
- Department of Chemistry and Biochemistry and Skaggs School of Pharmacy and Pharmaceutical Science, University of California, San Diego 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Yong-Gang Wang
- Department of Chemistry, Texas A&M University P.O. Box 30012, College Station, TX 77842 (USA)
| | - Daniel Romo
- Department of Chemistry, Texas A&M University P.O. Box 30012, College Station, TX 77842 (USA)
| | - Tadeusz F. Molinski
- Department of Chemistry and Biochemistry and Skaggs School of Pharmacy and Pharmaceutical Science, University of California, San Diego 9500 Gilman Drive, La Jolla, CA 92093 (USA)
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Stout EP, Morinaka BI, Wang YG, Romo D, Molinski TF. De novo synthesis of benzosceptrin C and nagelamide H from 7-15N-oroidin: implications for pyrrole-aminoimidazole alkaloid biosynthesis. JOURNAL OF NATURAL PRODUCTS 2012; 75:527-30. [PMID: 22455452 PMCID: PMC3694594 DOI: 10.1021/np300051k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
De novo synthesis of the natural products benzosceptrin C (7) and nagelamide H (8) was achieved using cell-free enzyme preparations from the marine sponges Agelas sceptrum and Stylissa caribica employing synthetic 7-(15)N-oroidin. These studies provide direct experimental evidence to support the long-standing, but untested, hypothesis that oroidin is a precursor to more complex pyrrole-aminoimidazole alkaloids, such as the sceptrins, benzosceptrins, and nagelamides. In addition, a new nagelamide, didebromonagelamide A (5b), was isolated from S. caribica, representing the first report of a nagelamide-like compound from the Caribbean.
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Affiliation(s)
- E. Paige Stout
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0358, USA
| | - Brandon I. Morinaka
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0358, USA
| | - Yong-Gang Wang
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 77842-3012, USA
| | - Daniel Romo
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 77842-3012, USA
| | - Tadeusz F. Molinski
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0358, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093-0358, USA
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Pyrrole Aminoimidazole Alkaloid Metabiosynthesis with Marine Sponges Agelas conifera and Stylissa caribica. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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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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Theoretical NMR correlations based Structure Discussion. J Cheminform 2011; 3:27. [PMID: 21797997 PMCID: PMC3162559 DOI: 10.1186/1758-2946-3-27] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 07/28/2011] [Indexed: 11/19/2022] Open
Abstract
The constitutional assignment of natural products by NMR spectroscopy is usually based on 2D NMR experiments like COSY, HSQC, and HMBC. The actual difficulty of the structure elucidation problem depends more on the type of the investigated molecule than on its size. The moment HMBC data is involved in the process or a large number of heteroatoms is present, a possibility of multiple solutions fitting the same data set exists. A structure elucidation software can be used to find such alternative constitutional assignments and help in the discussion in order to find the correct solution. But this is rarely done. This article describes the use of theoretical NMR correlation data in the structure elucidation process with WEBCOCON, not for the initial constitutional assignments, but to define how well a suggested molecule could have been described by NMR correlation data. The results of this analysis can be used to decide on further steps needed to assure the correctness of the structural assignment. As first step the analysis of the deviation of carbon chemical shifts is performed, comparing chemical shifts predicted for each possible solution with the experimental data. The application of this technique to three well known compounds is shown. Using NMR correlation data alone for the description of the constitutions is not always enough, even when including 13C chemical shift prediction.
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da Silva FR, Tessis AC, Ferreira PF, Rangel LP, Garcia-Gomes AS, Pereira FR, Berlinck RGS, Muricy G, Ferreira-Pereira A. Oroidin inhibits the activity of the multidrug resistance target Pdr5p from yeast plasma membranes. JOURNAL OF NATURAL PRODUCTS 2011; 74:279-282. [PMID: 21207971 DOI: 10.1021/np1006247] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Oroidin was isolated from the marine sponge Agelassventres and inhibited the activity and function of Pdr5p, an enzyme responsible for the multidrug resistance phenotype in Saccharomyces cerevisiae. This compound may help in the development of new drugs that reverse this dangerous phenotype of pathogenic yeast and fungi.
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Affiliation(s)
- Fernanda R da Silva
- Laboratório de Bioquímica Microbiana, Departamento de Microbiologia Geral, IMPPG, Universidade Federal do Rio de Janeiro, CEP 21941-590, Rio de Janeiro, RJ, Brazil
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Mukherjee S, Sivappa R, Yousufuddin M, Lovely CJ. Asymmetric total synthesis of ent-cyclooroidin. Org Lett 2011; 12:4940-3. [PMID: 20929213 DOI: 10.1021/ol1020916] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An enantiospecific total synthesis of the pyrrole-imidazole natural product cyclooroidin from histidine is described. The key N1-C9 bond is constructed through an intramolecular SN2-type of reaction of a chloro ester. Subsequent imidazole azidation at the 2-position, pyrrole bromination, azide reduction, and deprotection leads to the completion of the synthesis.
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Affiliation(s)
- Sabuj Mukherjee
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, United States
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Kuramoto M, Miyake N, Ishimaru Y, Ono N, Uno H. Cylindradines A and B: novel bromopyrrole alkaloids from the marine sponge Axinella cylindratus. Org Lett 2010; 10:5465-8. [PMID: 18975955 DOI: 10.1021/ol802263j] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The novel alkaloids cylindradines A and B were isolated from Axinella cylindratus, and their structures were elucidated by spectroscopic analyses. Stereochemistries of these compounds were determined by X-ray analysis. Cylindradines showed moderate inhibitory activity against the murine leukemia cell line P388.
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Affiliation(s)
- Makoto Kuramoto
- Department of Molecular Science, Integrated Center for Sciences, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan.
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Ando N, Terashima S. A novel synthesis of the 2-amino-1H-imidazol-4-carbaldehyde derivatives and its application to the efficient synthesis of 2-aminoimidazole alkaloids, oroidin, hymenidin, dispacamide, monobromodispacamide, and ageladine A. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.05.074] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Patel K, Laville R, Martin MT, Tilvi S, Moriou C, Gallard JF, Ermolenko L, Debitus C, Al-Mourabit A. Unprecedented Stylissazoles A-C from Stylissa carteri: Another Dimension for Marine Pyrrole-2-aminoimidazole Metabolite Diversity. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Unprecedented Stylissazoles A-C from Stylissa carteri: Another Dimension for Marine Pyrrole-2-aminoimidazole Metabolite Diversity. Angew Chem Int Ed Engl 2010; 49:4775-9. [DOI: 10.1002/anie.201000444] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Young IS, Thornton PD, Thompson A. Synthesis of natural products containing the pyrrolic ring. Nat Prod Rep 2010; 27:1801-39. [DOI: 10.1039/c0np00014k] [Citation(s) in RCA: 249] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Abstract
The pyrrole-imidazole family of marine alkaloids, derived from linear clathrodin-like precursors, constitutes a diverse array of structurally complex natural products. The bioactive agelastatins are members of this family that possess a tetracyclic molecular framework incorporating C4-C8 and C7-N12 bond connectivities. We provide a hypothesis for the formation of the unique agelastatin architecture that maximally exploits the intrinsic chemistry of plausible biosynthetic precursors. We report the concise enantioselective total syntheses of all known agelastatin alkaloids including the first total syntheses of agelastatins C, D, E, and F. Our gram-scale chemical synthesis of agelastatin A was inspired by our hypothesis for the biogenesis of the cyclopentane C-ring and required the development of new transformations including an imidazolone-forming annulation reaction and a carbohydroxylative trapping of imidazolones.
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Affiliation(s)
- Mohammad Movassaghi
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Avenue 18-292, Cambridge, MA 02139-4307, USA;
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40
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Kubota T, Araki A, Yasuda T, Tsuda M, Fromont J, Aoyama K, Mikami Y, Wälchli MR, Kobayashi J. Benzosceptrin C, a new dimeric bromopyrrole alkaloid from sponge Agelas sp. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.10.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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41
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Picon S, Zaparucha A, Al-Mourabit A. N-Pyridinium imidates as new sources of 2-aminoimidazole and imidazoline derivatives. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.09.101] [Citation(s) in RCA: 10] [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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42
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Appenzeller J, Tilvi S, Martin MT, Gallard JF, El-bitar H, Dau ETH, Debitus C, Laurent D, Moriou C, Al-Mourabit A. Benzosceptrins A and B with a Unique Benzocyclobutane Skeleton and Nagelamide S and T from Pacific Sponges. Org Lett 2009; 11:4874-7. [DOI: 10.1021/ol901946h] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jérôme Appenzeller
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Supriya Tilvi
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Marie-Thérèse Martin
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Jean-François Gallard
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Hoda El-bitar
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Elise Tran Huu Dau
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Cécile Debitus
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Dominique Laurent
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Céline Moriou
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
| | - Ali Al-Mourabit
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France, IRD-UMR 152, Centre polynesien de recherche sur la biodiversité insulaire, Papeete, French Polynesia, and UMR 152 IRD-Université Paul Sabatier Toulouse III, 31062 Toulouse cedex 9, France
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Kaila JC, Baraiya AB, Pandya AN, Jalani HB, Vasu KK, Sudarsanam V. A convenient synthesis of di- and trisubstituted 2-aminoimidazoles from 1-amidino-3-trityl-thioureas. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.04.083] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ebada SS, Edrada-Ebel R, de Voogd NJ, Wray V, Proksch P. Dibromopyrrole Alkaloids from the Marine Sponge Acanthostylotella sp. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900400112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Fourteen dibromopyrrole alkaloids were isolated from the marine sponge Acanthostylotella sp. collected in Indonesia. In addition to the known compounds 4,5-dibromo-N-(methoxy-methyl)-1 H-pyrrole-2-carboxamide (7), 4,5-dibromo-1 H-pyrrole-2-carboxamide (8), mukanadin D (9), (±)-longamide B methyl ester (10), (±)-longamide B (11), (±)-longamide (12), 3,4-dibromo-1 H-pyrrole-2-carboxamide (13), 2-cyano-4,5-dibromo-1 H-pyrrole (14), six compounds were isolated that proved to be new natural products including acanthamides A – D (1 – 4), methyl 3,4-dibromo-1 H-pyrrole-2-carboxylate (5) and 3,5-dibromo-1 H-pyrrole-2-carboxylic acid (6). The structures of the new compounds were unequivocally identified based on one and two dimensional NMR and on HRFTMS as well as by comparison with the literature.
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Affiliation(s)
- Sherif Saeed Ebada
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, Geb. 26.23, 40225 Düsseldorf, Germany
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmacy, Ain-Shams University, Abbasia, Cairo, Egypt
| | - RuAngelie Edrada-Ebel
- Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, The John Arbuthnott Building, 27 Taylor Street, Glasgow G4 0NR, United Kingdom
| | - Nicole J. de Voogd
- National Museum of Natural History, PO Box 9517 2300 RA Leiden, Netherlands
| | - Victor Wray
- Helmholtz Zentrum für Infektionsforschung, Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Peter Proksch
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, Geb. 26.23, 40225 Düsseldorf, Germany
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Kennedy JP, Brogan JT, Lindsley CW. Total synthesis and biological evaluation of the marine bromopyrrole alkaloid dispyrin: elucidation of discrete molecular targets with therapeutic potential. JOURNAL OF NATURAL PRODUCTS 2008; 71:1783-1786. [PMID: 18800848 DOI: 10.1021/np800339e] [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
The first total synthesis of dispyrin, a recently reported bromopyrrole alkaloid from Agelas dispar with an unprecedented bromopyrrole tyramine motif, was achieved in three steps on a gram scale (68.4% overall). No biological activity was reported for dispyrin, so we evaluated synthetic dispyrin against>200 discrete molecular targets in radioligand binding and functional assays. Unlike most marine natural products, dispyrin (1) possesses no antibacterial or anticancer activity, but was found to be a potent ligand and antagonist of several therapeutically relevant GPCRs, the alpha1D and alpha2A adrenergic receptors and the H2 and H3 histamine receptors.
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Affiliation(s)
- J Phillip Kennedy
- Department of Chemistry, Vanderbilt Program in Drug Discovery, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Vanderbilt Medical Center, Nashville, TN 37232-6600, USA
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47
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Meyer SW, Köck M. NMR studies of phakellins and isophakellins. JOURNAL OF NATURAL PRODUCTS 2008; 71:1524-1529. [PMID: 18771245 DOI: 10.1021/np8000706] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Phakellins 3 and 4 and isophakellins 5 and 6 are tetracyclic pyrrole-imidazole alkaloids. Their structure elucidation is herein reviewed using state-of-the-art NMR methods. Special emphasis has been given to the application of ADEQUATE NMR pulse sequences. Furthermore, (15)N NMR chemical shifts, proton T1 relaxation times, and (1)J(CH) coupling constants were determined.
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Affiliation(s)
- Sven W Meyer
- Alfred-Wegener-Institut für Polar- and Meeresforschung in der Helmholtz-Gemeinschaft, Am Handelshafen 12, D-27570 Bremerhaven, Germany
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Araki A, Kubota T, Tsuda M, Mikami Y, Fromont J, Kobayashi J. Nagelamides K and L, Dimeric Bromopyrrole Alkaloids from Sponge Agelas Species. Org Lett 2008; 10:2099-102. [DOI: 10.1021/ol8003904] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Atsushi Araki
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan, Medical Mycology Research Center, Chiba University, Chiba 260-0856, Japan, and Western Australian Museum, Locked Bag 49, Welshpool DC, WA 6986, Australia
| | - Takaaki Kubota
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan, Medical Mycology Research Center, Chiba University, Chiba 260-0856, Japan, and Western Australian Museum, Locked Bag 49, Welshpool DC, WA 6986, Australia
| | - Masashi Tsuda
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan, Medical Mycology Research Center, Chiba University, Chiba 260-0856, Japan, and Western Australian Museum, Locked Bag 49, Welshpool DC, WA 6986, Australia
| | - Yuzuru Mikami
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan, Medical Mycology Research Center, Chiba University, Chiba 260-0856, Japan, and Western Australian Museum, Locked Bag 49, Welshpool DC, WA 6986, Australia
| | - Jane Fromont
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan, Medical Mycology Research Center, Chiba University, Chiba 260-0856, Japan, and Western Australian Museum, Locked Bag 49, Welshpool DC, WA 6986, Australia
| | - Jun’ichi Kobayashi
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan, Medical Mycology Research Center, Chiba University, Chiba 260-0856, Japan, and Western Australian Museum, Locked Bag 49, Welshpool DC, WA 6986, Australia
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Soh CH, Chui WK, Lam Y. An efficient and expeditious synthesis of di- and monosubstituted 2-aminoimidazoles. ACTA ACUST UNITED AC 2007; 10:118-22. [PMID: 18159933 DOI: 10.1021/cc700143n] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A microwave-assisted protocol was developed for the construction of di- and monosubstituted 2-aminoimidazoles. The two-step reaction involves the synthesis of N-(1H-imidazol-2-yl)acetamides from readily available alpha-haloketones and N-acetylguanidine, followed by deacetylation. Significant rate enhancement was observed for both steps of the protocol, and the overall reaction time was shortened to 20 min compared to 48 h of the conventional procedures. A representative set of di- and monosubstituted 2-aminoimidazoles was prepared using commercially available parallel reactors.
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Affiliation(s)
- Chai Hoon Soh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore
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Tsuda M, Yasuda T, Fukushi E, Kawabata J, Sekiguchi M, Fromont J, Kobayashi J. Agesamides A and B, Bromopyrrole Alkaloids from SpongeAgelasSpecies: Application of DOSY for Chemical Screening of New Metabolites. Org Lett 2006; 8:4235-8. [PMID: 16956195 DOI: 10.1021/ol061464q] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Diffusion-ordered NMR spectroscopy (DOSY) is a versatile and powerful NMR technique and a noninvasive analytical method for mixture analysis that does not require prior physical separation of the analytes. In our search for new metabolites from natural resources, DOSY was applied for constituent analysis of crude bromopyrrole fractions separated from an Okinawan marine sponge Agelas sp. so that two new bromopyrrole alkaloids, agesamides A (1) and B (2), have been isolated. The structures and relative stereochemistry of 1 and 2 were elucidated from spectroscopic data.
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Affiliation(s)
- Masashi Tsuda
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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