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Chen W, Pang X, Song Y, Hu Y, Wang X, Wang L, Wang J. Antitumor aspochalasin and antiviral benzofuran derivatives from a marine-derived fungus Aspergillus sp. SCSIO41032. Nat Prod Res 2024:1-8. [PMID: 38853392 DOI: 10.1080/14786419.2024.2364930] [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: 01/31/2024] [Accepted: 06/02/2024] [Indexed: 06/11/2024]
Abstract
Chemical investigation of the EtOAc extract of a deep-sea derived fungus Aspergillus sp. SCSIO41032 resulted in the isolation of ten known compounds, including eight aspochalasins. Their structures were elucidated by using extensive NMR spectroscopic, mass spectrometric and single crystal X-ray diffraction analysis. The detailed crystallographic data for structures 1, 2, and 4, along with the relative configurations of aspochalasin E (3) determined by its acetonide derivative were reported for the first time. The results of antitumor and antiviral activities showed that 3 displayed moderate antitumor activities against 22Rv1, PC-3, A549, and HCT-15 cell lines with IC50 values ranged from 5.9 ± 0.8 to 19.0 ± 7.7 μM, and 9 exhibited moderate antiviral activities against HSV-1/2 with EC50 values of 9.5 ± 0.5 and 5.4 ± 0.6 μM, respectively. Plate clone formation assays results indicated that 3 inhibited the 22Rv1, PC-3 cells growth in a dose-dependent manner.
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Affiliation(s)
- Weihao Chen
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, P. R. China
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, P. R. China
- Fuwai Hospital Chinese Academy of Medical Sciences, State Key Laboratory of Cardiovascular Disease, Shenzhen, P. R. China
| | - Xiaoyan Pang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, P. R. China
- Sanya Institute of Ocean Eco-Environmental Engineering, Sanya, P. R. China
| | - Yingying Song
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, P. R. China
| | - Yiwei Hu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, P. R. China
| | - Xueni Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, P. R. China
- Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning, P. R. China
| | - Lishu Wang
- Jilin Provincial Academy of Chinese Medicine Sciences, Changchun, P. R. China
| | - Junfeng Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, P. R. China
- Sanya Institute of Ocean Eco-Environmental Engineering, Sanya, P. R. China
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Liu M, Zhang X, Li G. Structural and Biological Insights into the Hot‐spot Marine Natural Products Reported from 2012 to 2021. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mingyu Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy Ocean University of China Qingdao 266003 China
- State Key Laboratory of Microbial Technology Shandong University Qingdao 266237 China
| | - Xingwang Zhang
- State Key Laboratory of Microbial Technology Shandong University Qingdao 266237 China
| | - Guoqiang 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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Lim HJ, An JS, Bae ES, Cho E, Hwang S, Nam SJ, Oh KB, Lee SK, Oh DC. Ligiamycins A and B, Decalin-Amino-Maleimides from the Co-Culture of Streptomyces sp. and Achromobacter sp. Isolated from the Marine Wharf Roach, Ligia exotica. Mar Drugs 2022; 20:83. [PMID: 35200613 PMCID: PMC8878407 DOI: 10.3390/md20020083] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/08/2022] [Accepted: 01/11/2022] [Indexed: 02/04/2023] Open
Abstract
Streptomyces sp. GET02.ST and Achromobacter sp. GET02.AC were isolated together from the gut of the wharf roach, Ligia exotica, inhabiting the intertidal zone of the west coast of Korea. The co-cultivation of these two strains significantly induced the production of two new metabolites, ligiamycins A (1) and B (2), which were barely detected in the single culture of Streptomyces sp. GET02.ST. The planar structures of ligiamycins A (1) and B (2) were elucidated as new decalins coupled with amino-maleimides by the analysis of various spectroscopic data, including nuclear magnetic resonance (NMR), ultraviolet (UV), and mass (MS) data. The assignment of two nitrogen atoms in amino-maleimide in 1 was accomplished based on 1H-15N heteroatom single quantum coherence spectroscopy (HSQC) NMR experiments. The relative configurations of the ligiamycins were determined using rotating frame Overhauser effect spectroscopy (ROESY) NMR data, and their absolute configurations were deduced by comparing their experimental and calculated optical rotations. Ligiamycin A (1) displayed antibacterial effects against Staphylococcus aureus and Salmonella enterica, while ligiamycin B (2) exhibited mild cell cytotoxicity against human colorectal cancer cells.
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Affiliation(s)
- Hyung-Ju Lim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Joon Soo An
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Eun Seo Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Eunji Cho
- Department of Agriculture Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (E.C.); (K.-B.O.)
| | - Sunghoon Hwang
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea;
| | - Ki-Bong Oh
- Department of Agriculture Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (E.C.); (K.-B.O.)
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
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Progress in the Chemistry of Cytochalasans. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2021; 114:1-134. [PMID: 33792860 DOI: 10.1007/978-3-030-59444-2_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cytochalasans are a group of fungal-derived natural products characterized by a perhydro-isoindolone core fused with a macrocyclic ring, and they exhibit a high structural diversity and a broad spectrum of bioactivities. Cytochalasans have attracted significant attention from the chemical and pharmacological communities and have been reviewed previously from various perspectives in recent years. However, continued interest in the cytochalasans and the number of laboratory investigations on these compounds are both growing rapidly. This contribution provides a general overview of the isolation, structural determination, biological activities, biosynthesis, and total synthesis of cytochalasans. In total, 477 cytochalasans are covered, including "merocytochalasans" that arise by the dimerization or polymerization of one or more cytochalasan molecules with one or more other natural product units. This contribution provides a comprehensive treatment of the cytochalasans, and it is hoped that it may stimulate further work on these interesting natural products.
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Utermann C, Echelmeyer VA, Oppong-Danquah E, Blümel M, Tasdemir D. Diversity, Bioactivity Profiling and Untargeted Metabolomics of the Cultivable Gut Microbiota of Ciona intestinalis. Mar Drugs 2020; 19:6. [PMID: 33374243 PMCID: PMC7824411 DOI: 10.3390/md19010006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/13/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022] Open
Abstract
It is widely accepted that the commensal gut microbiota contributes to the health and well-being of its host. The solitary tunicate Ciona intestinalis emerges as a model organism for studying host-microbe interactions taking place in the gut, however, the potential of its gut-associated microbiota for marine biodiscovery remains unexploited. In this study, we set out to investigate the diversity, chemical space, and pharmacological potential of the gut-associated microbiota of C. intestinalis collected from the Baltic and North Seas. In a culture-based approach, we isolated 61 bacterial and 40 fungal strains affiliated to 33 different microbial genera, indicating a rich and diverse gut microbiota dominated by Gammaproteobacteria. In vitro screening of the crude microbial extracts indicated their antibacterial (64% of extracts), anticancer (22%), and/or antifungal (11%) potential. Nine microbial crude extracts were prioritized for in-depth metabolome mining by a bioactivity- and chemical diversity-based selection procedure. UPLC-MS/MS-based metabolomics combining automated (feature-based molecular networking and in silico dereplication) and manual approaches significantly improved the annotation rates. A high chemical diversity was detected where peptides and polyketides were the predominant classes. Many compounds remained unknown, including two putatively novel lipopeptides produced by a Trichoderma sp. strain. This is the first study assessing the chemical and pharmacological profile of the cultivable gut microbiota of C. intestinalis.
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Affiliation(s)
- Caroline Utermann
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (V.A.E.); (E.O.-D.); (M.B.)
| | - Vivien A. Echelmeyer
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (V.A.E.); (E.O.-D.); (M.B.)
| | - Ernest Oppong-Danquah
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (V.A.E.); (E.O.-D.); (M.B.)
| | - Martina Blümel
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (V.A.E.); (E.O.-D.); (M.B.)
| | - Deniz Tasdemir
- GEOMAR Centre for Marine Biotechnology (GEOMAR-Biotech), Research Unit Marine Natural Products Chemistry, GEOMAR Helmholtz Centre for Ocean Research Kiel, Am Kiel-Kanal 44, 24106 Kiel, Germany; (C.U.); (V.A.E.); (E.O.-D.); (M.B.)
- Faculty of Mathematics and Natural Sciences, Kiel University, Christian-Albrechts-Platz 4, 24118 Kiel, Germany
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Xu K, Yuan XL, Li C, Li XD. Recent Discovery of Heterocyclic Alkaloids from Marine-Derived Aspergillus Species. Mar Drugs 2020; 18:E54. [PMID: 31947564 PMCID: PMC7024353 DOI: 10.3390/md18010054] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 01/10/2020] [Accepted: 01/11/2020] [Indexed: 12/19/2022] Open
Abstract
Nitrogen heterocycles have drawn considerable attention due to of their significant biological activities. The marine fungi residing in extreme environments are among the richest sources of these basic nitrogen-containing secondary metabolites. As one of the most well-known universal groups of filamentous fungi, marine-derived Aspergillus species produce a large number of structurally unique heterocyclic alkaloids. This review attempts to provide a comprehensive summary of the structural diversity and biological activities of heterocyclic alkaloids that are produced by marine-derived Aspergillus species. Herein, a total of 130 such structures that were reported from the beginning of 2014 through the end of 2018 are included, and 75 references are cited in this review, which will benefit future drug development and innovation.
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Affiliation(s)
- Kuo Xu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China; (K.X.); (X.-L.Y.)
| | - Xiao-Long Yuan
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China; (K.X.); (X.-L.Y.)
| | - Chen Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;
- Key Laboratory of marine biotechnology in Universities of Shandong (Ludong University), School of Life Sciences, Ludong University, Yantai 264025, China
| | - Xiao-Dong Li
- Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;
- Key Laboratory of marine biotechnology in Universities of Shandong (Ludong University), School of Life Sciences, Ludong University, Yantai 264025, China
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Liu Z, Frank M, Yu X, Yu H, Tran-Cong NM, Gao Y, Proksch P. Secondary Metabolites from Marine-Derived Fungi from China. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2020; 111:81-153. [PMID: 32114663 DOI: 10.1007/978-3-030-37865-3_2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Marine-derived fungi play an important role in the search for structurally unique secondary metabolites, some of which show promising pharmacological activities that make them useful leads for drug discovery. Marine natural product research in China in general has made enormous progress in the last two decades as described in this chapter on fungal metabolites. This contribution covers 613 new natural products reported from 2001 to 2017 from marine-derived fungi obtained from algae, sponges, corals, and other marine organisms from Chinese waters. The genera Aspergillus (170 new natural products, 28%) and Penicillium (70 new natural products, 11%) were the main fungal producers of new natural products during the time period covered, whereas sponges (184 new natural products, 30%) were the most abundant source of new natural products, followed by corals (154 new natural products, 25%) and algae (130 new natural products, 21%). Close to 40% of all natural products covered in this contribution displayed various bioactivities. The major bioactivities reported were cytotoxicity against different cancer cell lines, antimicrobial (mainly antibacterial) activity, and antiviral activity, which accounted for 13%, 9%, and 3% of all natural products reported. In terms of structural classes, polyketides (188 new natural products, 31%) play a dominant role, and if prenylated polyketides and nitrogen-containing polyketides (included in meroterpenes and alkaloids in this contribution) are taken into account, their total number even exceeds 50%. Nitrogen-containing compounds including peptides (65 new natural products, 10%) and alkaloids (103 new natural products, 17%) are the second largest group.
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Affiliation(s)
- Zhen Liu
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Marian Frank
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Xiaoqin Yu
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Haiqian Yu
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Nam M Tran-Cong
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Ying Gao
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany.
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Xu Y, Huang R, Liu H, Yan T, Ding W, Jiang Y, Wang P, Zheng D, Xu J. New Polyketides from the Marine-Derived Fungus Letendraea sp. 5XNZ4-2. Mar Drugs 2019; 18:md18010018. [PMID: 31878313 PMCID: PMC7024145 DOI: 10.3390/md18010018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/12/2019] [Accepted: 12/22/2019] [Indexed: 01/10/2023] Open
Abstract
Marine-derived fungi have been reported to have great potential to produce structurally unique metabolites. Our investigation on secondary metabolites from marine-derived fungi resulted in the isolation of seven new polyketides (phomopsiketones D–G (1–4) and letendronols A–C (5–7)) as well as one known xylarinol (8) in the cultural broth of Letendraea sp. Their structures and absolute configurations were elucidated using a set of spectroscopic and chemical methods, including HRESIMS, NMR, single-crystal X-ray diffraction, ECD calculation, and a modified version of Mosher’s method. Compound 2 showed weak inhibition against nitric oxide production in lipopolysaccaride-activated macrophages with an IC50 value of 86 μM.
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Affiliation(s)
- Yan Xu
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
| | - Ruibao Huang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
| | - Hongwei Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;
| | - Tingting Yan
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
| | - Wanjing Ding
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
| | - Yongjun Jiang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
| | - Pinmei Wang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
| | - Daoqiong Zheng
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
| | - Jinzhong Xu
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China; (Y.X.); (R.H.); (T.Y.); (W.D.); (Y.J.); (P.W.); (D.Z.)
- Correspondence: ; Tel.: +86-158-5816-8018
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Abstract
Covering: January to December 2017This review covers the literature published in 2017 for marine natural products (MNPs), with 740 citations (723 for the period January to December 2017) 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 (1490 in 477 papers for 2017), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. Geographic distributions of MNPs at a phylogenetic level are reported.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
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YANG GX, MA GL, LI H, HUANG T, XIONG J, HU JF. Advanced natural products chemistry research in China between 2015 and 2017. Chin J Nat Med 2018; 16:881-906. [DOI: 10.1016/s1875-5364(18)30131-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Indexed: 10/27/2022]
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Wang JT, Zhang PL, Liu JS, Wang GK, Xu FQ, Chen L, Yu Y, Wang G. Aspergilates A to E, second metabolites from Aspergillus sp. isolated from Paeonia ostii. Fitoterapia 2018; 131:204-208. [DOI: 10.1016/j.fitote.2018.10.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/24/2018] [Accepted: 10/28/2018] [Indexed: 12/14/2022]
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Two Novel Aspochalasins from the Gut Fungus Aspergillus sp. Z4. Mar Drugs 2018; 16:md16100343. [PMID: 30241299 PMCID: PMC6213381 DOI: 10.3390/md16100343] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 09/13/2018] [Accepted: 09/18/2018] [Indexed: 11/16/2022] Open
Abstract
Two novel aspochalasins, tricochalasin A (1) and aspochalasin A2 (2), along with three known compounds (3–5) have been isolated from the different culture broth of Aspergillus sp., which was found in the gut of a marine isopod Ligia oceanica. Compound 1 contains a rare 5/6/6 tricyclic ring fused with the aspochalasin skeleton. The structures were determined on the basis of electrospray ionisation mass spectroscopy (ESIMS), nuclear magnetic resonance (NMR) spectral data, and the absolute configurations were further confirmed by modified Mosher’s method. Cytotoxicity against the prostate cancer PC3 cell line were assayed by the MTT method. Compound 3 showed strong activity while the remaining compounds showed weak activity.
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Abstract
Two novel aspochalasins, tricochalasin A (1) and aspochalasin A2 (2), along with three known compounds (3–5) have been isolated from the different culture broth of Aspergillus sp., which was found in the gut of a marine isopod Ligia oceanica. Compound 1 contains a rare 5/6/6 tricyclic ring fused with the aspochalasin skeleton. The structures were determined on the basis of electrospray ionisation mass spectroscopy (ESIMS), nuclear magnetic resonance (NMR) spectral data, and the absolute configurations were further confirmed by modified Mosher’s method. Cytotoxicity against the prostate cancer PC3 cell line were assayed by the MTT method. Compound 3 showed strong activity while the remaining compounds showed weak activity.
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14
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Okamoto T, Shibata M, Karanjit S, Nakayama A, Yoshida M, Namba K. Direct Synthesis of Polycyclic Tropinones by a Condensation-[4+3]-Cycloaddition Cascade Reaction. Chemistry 2018; 24:9508-9513. [PMID: 29701268 DOI: 10.1002/chem.201802011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Indexed: 11/07/2022]
Abstract
A concise method of constructing polycyclic tropinone frameworks was developed. The single-step synthesis of polycyclic tropinone consists of an intramolecular [4+3] cycloaddition reaction of N-nosyl-pyrrole with oxyallyl cation that was generated in situ by an intermolecular condensation reaction of the nucleophilic functional groups on a tethered pyrrole with the aldehyde of 2-(silyloxy)-acrolein. This cascade reaction afforded various polycyclic tropinones including tri-, tetra-, and pentacyclic systems in high yields as single diastereomers.
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Affiliation(s)
- Tsubasa Okamoto
- Department of Pharmaceutical Science, Tokushima University, 1-78-1 Shomachi, Tokushima, 770-8505, Japan
| | - Miki Shibata
- Department of Pharmaceutical Science, Tokushima University, 1-78-1 Shomachi, Tokushima, 770-8505, Japan
| | - Sangita Karanjit
- Department of Pharmaceutical Science, Tokushima University, 1-78-1 Shomachi, Tokushima, 770-8505, Japan
| | - Atsushi Nakayama
- Department of Pharmaceutical Science, Tokushima University, 1-78-1 Shomachi, Tokushima, 770-8505, Japan
| | - Masahiro Yoshida
- Department of Pharmaceutical Science, Tokushima bunri University, Tokushima, 770-8514, Japan
| | - Kosuke Namba
- Department of Pharmaceutical Science, Tokushima University, 1-78-1 Shomachi, Tokushima, 770-8505, Japan
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Hill RA, Sutherland A. Hot off the Press. Nat Prod Rep 2017; 34:940-944. [PMID: 28717803 DOI: 10.1039/c7np90028g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as svetamycin B from a Streptomyces species.
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Affiliation(s)
- Robert A Hill
- School of Chemistry, Glasgow University, Glasgow, G12 8QQ, UK.
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