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Fragkiadakis M, Zingiridis M, Loukopoulos E, Neochoritis CG. New oxacycles on the block: benzodioxepinones via a Passerini reaction. Mol Divers 2024; 28:29-35. [PMID: 35900638 DOI: 10.1007/s11030-022-10502-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 07/14/2022] [Indexed: 11/25/2022]
Abstract
Oxacycles and benzoxepanes are privileged motifs present in a variety of natural products and functional molecules. However, their synthetic access is limited. Here, we demonstrate a rapid synthesis of unprecedented benzoxepanes from readily available starting materials in one step via a Passerini multicomponent reaction. The reaction proceeds smoothly under mild reaction conditions. We have obtained a single-crystal X-ray structure, revealing a butterfly conformation, combined with useful structural features. In addition, we have performed both a full interaction map on the X-ray structure and a profile analysis of a virtual library based on the proposed scaffold with a special focus on certain physicochemical parameters to demonstrate their potential usage in drug discovery.
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Yang Y, Gao ZF, Hou GG, Meng QG, Hou Y. Discovery of anti-neuroinflammatory agents from 1,4,5,6-tetrahydrobenzo[2,3]oxepino[4,5-d]pyrimidin-2-amine derivatives by regulating microglia polarization. Eur J Med Chem 2023; 259:115688. [PMID: 37544188 DOI: 10.1016/j.ejmech.2023.115688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/17/2023] [Accepted: 07/26/2023] [Indexed: 08/08/2023]
Abstract
Neuroinflammation mediated by microglia activation leads to various neurodegenerative and neurological disorders. In order to develop more and better options for this disorders, a series of 3,4-dihydrobenzo[b]oxepin-5(2H)-one derivatives (BZPs, 6-19) and novel 1,4,5,6-tetrahydrobenzo[2,3]oxepino[4,5-d]pyrimidin-2-amine derivatives (BPMs, 20-33) were synthesized and screened the anti-neuroinflamamtion effects. 3,5-bis-trifluoromethylphenyl-substituted BPM 29 showed more potent anti-neuroinflammatory activity and no toxicity to BV2 microglia cells in vitro. 29 significantly reduced the number of M1 phenotype of microglia cells, but significantly increased the number of M2 phenotype of microglia cells in lipopolysaccharide (LPS)-induced BV2 microglia cells. 29 significantly reduced the secretion of inflammatory cytokines (IL-18, IL-1β, TNF-α), but increased the secretion of anti-inflammatory cytokines (IL-10) from LPS-induced BV2 microglia cells. Also, 29 inhibited the NOD-like receptor NLRP3 inflammasome formation, and down-regulated the expression of M2 isoform of pyruvate kinase in LPS-induced BV2 microglia cells. In vivo, 29 reduced the neuroinflammation in cuprizone-induced inflammatory and demyelinating mice by reducing the expression of inducible nitric-oxide synthase, but increased the expression of CD206. Taken together, 29 might be a prospective anti-neuroinflammatory compound for neuroinflammatory and demyelinating disease by alleviating microglia activation.
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Affiliation(s)
- Yang Yang
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, 264003, PR China
| | - Zhong-Fei Gao
- School of Pharmacy, The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Binzhou Medical University, Yantai, 264003, PR China
| | - Gui-Ge Hou
- School of Pharmacy, The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Binzhou Medical University, Yantai, 264003, PR China.
| | - Qing-Guo Meng
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Yantai, 264005, People's Republic of China.
| | - Yun Hou
- School of Basic Medical Sciences, Binzhou Medical University, Yantai, 264003, PR China.
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3
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Abstract
Covering: 2000 to 2022Natural products are a vital source of compounds for use in agriculture, medicine, cosmetics, and other fields. Macrolides are a wide group of natural products found in plants and microorganisms. They are a group of polyketides constituted of different-sized rings and characterized by the presence of a lactone group. These compounds show different biological activities, such as antiviral, antiparasitic, antifungal, antibacterial, immunosuppressive, herbicidal, and cytotoxic activities. This review is focused on macrolides isolated from fungal sources, examining their biological activities, stereochemistry, and structure-activity relationships. The review reports the chemical and biological characterization of fungal macrolides isolated in the last four decades, with assistance from SciFinder searches. A critical evaluation of the most recent reviews covering this area is also provided. The content provided in this review is of interest to chemists focusing on natural substances, plant pathologists and physiologists, botanists, mycologists, biologists, and pharmacologists. Furthermore, it is of interest to farmers and agri-food specialists and those working in the medicinal and cosmetic industries due to the potential practical application of macrolides. Politicians could also be interested in this class of natural compound, as the practical application of these macrolides in the above-cited fields could reduce environmental pollution and increase consumer satisfaction with respect to food, providing reduced or zero risk to human and animal health along with increased nutraceutical value.
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Affiliation(s)
- Antonio Evidente
- Department of Chemical Sciense, University of Naples Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126, Naples, Italy.
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Isolation and Structure Elucidation of New Cytotoxic Macrolides Halosmysins B and C from the Fungus Halosphaeriaceae sp. Associated with a Marine Alga. Mar Drugs 2022; 20:md20040226. [PMID: 35447898 PMCID: PMC9030429 DOI: 10.3390/md20040226] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 02/04/2023] Open
Abstract
Two new cytotoxic metabolites, halosmysins B and C, have been isolated from the fungus Halosphaeriaceae sp. OUPS-135D-4 separated from the marine alga Sargassum thunbergii. These chemical structures have been elucidated by 1D and 2D NMR, and HRFABMS spectral analyses. The new compounds had the same 14-membered macrodiolide skeleton as halosmysin A, which was isolated from this fungal strain previously. As the unique structural feature, a diketopiperazine derivative and a sugar are conjugated to the 14-membered ring of halosmysins B and C, respectively. The absolute stereostructures of them were elucidated by the chemical derivatization such as a hydrolysis, the comparison with the known compounds (6R,11R,12R,14R)-colletodiol and halosmysin A, and a HPLC analysis of sugar. In addition, their cytotoxicities were assessed using murine P388 leukemia, human HL-60 leukemia, and murine L1210 leukemia cell lines. Halosmysin B was shown to be potent against all of them, with IC50 values ranging from 8.2 ± 1.8 to 20.5 ± 3.6 μM, though these values were slightly higher than those of halosmysin A.
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Soares JX, Loureiro DRP, Dias AL, Reis S, Pinto MMM, Afonso CMM. Bioactive Marine Xanthones: A Review. Mar Drugs 2022; 20:58. [PMID: 35049913 PMCID: PMC8778107 DOI: 10.3390/md20010058] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 12/27/2021] [Accepted: 12/29/2021] [Indexed: 02/08/2023] Open
Abstract
The marine environment is an important source of specialized metabolites with valuable biological activities. Xanthones are a relevant chemical class of specialized metabolites found in this environment due to their structural variety and their biological activities. In this work, a comprehensive literature review of marine xanthones reported up to now was performed. A large number of bioactive xanthone derivatives (169) were identified, and their structures, biological activities, and natural sources were described. To characterize the chemical space occupied by marine-derived xanthones, molecular descriptors were calculated. For the analysis of the molecular descriptors, the xanthone derivatives were grouped into five structural categories (simple, prenylated, O-heterocyclic, complex, and hydroxanthones) and six biological activities (antitumor, antibacterial, antidiabetic, antifungal, antiviral, and miscellaneous). Moreover, the natural product-likeness and the drug-likeness of marine xanthones were also assessed. Marine xanthone derivatives are rewarding bioactive compounds and constitute a promising starting point for the design of other novel bioactive molecules.
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Affiliation(s)
- José X. Soares
- Laboratório Associado para a Química Verde (LAQV), Rede de Química e Tecnologia (REQUIMTE), Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (J.X.S.); (D.R.P.L.); (S.R.)
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (A.L.D.); (M.M.M.P.)
| | - Daniela R. P. Loureiro
- Laboratório Associado para a Química Verde (LAQV), Rede de Química e Tecnologia (REQUIMTE), Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (J.X.S.); (D.R.P.L.); (S.R.)
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (A.L.D.); (M.M.M.P.)
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
| | - Ana Laura Dias
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (A.L.D.); (M.M.M.P.)
| | - Salete Reis
- Laboratório Associado para a Química Verde (LAQV), Rede de Química e Tecnologia (REQUIMTE), Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (J.X.S.); (D.R.P.L.); (S.R.)
| | - Madalena M. M. Pinto
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (A.L.D.); (M.M.M.P.)
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
| | - Carlos M. M. Afonso
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (A.L.D.); (M.M.M.P.)
- Interdisciplinary Center of Marine and Environmental Investigation (CIIMAR/CIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
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6
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Zhang H, Zou J, Yan X, Chen J, Cao X, Wu J, Liu Y, Wang T. Marine-Derived Macrolides 1990-2020: An Overview of Chemical and Biological Diversity. Mar Drugs 2021; 19:180. [PMID: 33806230 PMCID: PMC8066444 DOI: 10.3390/md19040180] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 03/19/2021] [Accepted: 03/21/2021] [Indexed: 12/18/2022] Open
Abstract
Macrolides are a significant family of natural products with diverse structures and bioactivities. Considerable effort has been made in recent decades to isolate additional macrolides and characterize their chemical and bioactive properties. The majority of macrolides are obtained from marine organisms, including sponges, marine microorganisms and zooplankton, cnidarians, mollusks, red algae, bryozoans, and tunicates. Sponges, fungi and dinoflagellates are the main producers of macrolides. Marine macrolides possess a wide range of bioactive properties including cytotoxic, antibacterial, antifungal, antimitotic, antiviral, and other activities. Cytotoxicity is their most significant property, highlighting that marine macrolides still encompass many potential antitumor drug leads. This extensive review details the chemical and biological diversity of 505 macrolides derived from marine organisms which have been reported from 1990 to 2020.
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Affiliation(s)
| | | | | | | | | | | | | | - Tingting Wang
- Li Dak Sum Marine Biopharmaceutical Research Center, Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315800, China; (H.Z.); (J.Z.); (X.Y.); (J.C.); (X.C.); (J.W.); (Y.L.)
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7
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Tang PT, Shao YX, Wang LN, Wei Y, Li M, Zhang NJ, Luo XP, Ke Z, Liu YJ, Zeng MH. Synthesis of seven-membered lactones by regioselective and stereoselective iodolactonization of electron-deficient olefins. Chem Commun (Camb) 2020; 56:6680-6683. [PMID: 32412017 DOI: 10.1039/c9cc10080f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A regio- and stereoselective iodolactonization of internal electron-deficient olefinic acids has been reported, which provides a straightforward access to a series of multi-functionalized seven-membered lactones containing two consecutive chiral centers. The ester substituents on the olefins played a key role in achieving high regioselectivity. This result was proved through experiments and DFT calculations.
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Affiliation(s)
- Pan-Ting Tang
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - You-Xiang Shao
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Liang-Neng Wang
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - Yi Wei
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - Ming Li
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - Ni-Juan Zhang
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - Xiao-Peng Luo
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - Zhuofeng Ke
- School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Yue-Jin Liu
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.
| | - Ming-Hua Zeng
- Hubei Collaborative Innovation Center for Advanced Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, and College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China. and Department Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China.
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8
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Yamada T, Kogure H, Kataoka M, Kikuchi T, Hirano T. Halosmysin A, a Novel 14-Membered Macrodiolide Isolated from the Marine-Algae-Derived Fungus Halosphaeriaceae sp. Mar Drugs 2020; 18:E320. [PMID: 32570727 PMCID: PMC7344848 DOI: 10.3390/md18060320] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/15/2020] [Accepted: 06/16/2020] [Indexed: 12/11/2022] Open
Abstract
Halosmysin A, a new 14-membered macrodiolide with an unprecedented skeleton, was isolated from the fungus Halosphaeriaceae sp. OUPS-135D-4, which, in turn, was obtained from the marine algae Sargassum thunbergii. The chemical structure of the macrodiolide was elucidated using 1D and 2D NMR, as well as high resolution fast atom bombardment mass (HRFABMS) spectral analysis. The absolute stereochemistry was determined via chemical derivatization and comparison with a known compound, (6R,11R,12R,14R)-colletodiol. Additionally, halosmysin A was shown to be very potent against murine P388 leukemia, human HL-60 leukemia, and murine L1210 leukemia cell lines, with IC50 values ranging from 2.2 ± 3.1 to 11.7 ± 2.8 μM.
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Affiliation(s)
- Takeshi Yamada
- Department of Medicinal Molecular Chemistry, Osaka University of Pharmaceutical Sciences, 4-20-1, Nasahara, Takatsuki, Osaka 569-1094, Japan; (H.K.); (M.K.); (T.K.); (T.H.)
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9
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Awad GE, Ghanem AF, Abdel Wahab WA, Wahba MI. Functionalized κ-carrageenan/hyperbranched poly(amidoamine)for protease immobilization: Thermodynamics and stability studies. Int J Biol Macromol 2020; 148:1140-1155. [DOI: 10.1016/j.ijbiomac.2020.01.122] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 01/12/2020] [Accepted: 01/12/2020] [Indexed: 12/23/2022]
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10
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Gao CL, Hou GG, Liu J, Ru T, Xu YZ, Zhao SY, Ye H, Zhang LY, Chen KX, Guo YW, Pang T, Li XW. Synthesis and Target Identification of Benzoxepane Derivatives as Potential Anti-Neuroinflammatory Agents for Ischemic Stroke. Angew Chem Int Ed Engl 2019; 59:2429-2439. [PMID: 31782597 DOI: 10.1002/anie.201912489] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Indexed: 12/21/2022]
Abstract
Benzoxepane derivatives were designed and synthesized, and one hit compound emerged as being effective in vitro with low toxicity. In vivo, this hit compound ameliorated both sickness behavior through anti-inflammation in LPS-induced neuroinflammatory mice model and cerebral ischemic injury through anti-neuroinflammation in rats subjected to transient middle cerebral artery occlusion. Target fishing for the hit compound using photoaffinity probes led to identification of PKM2 as the target protein responsible for anti-inflammatory effect of the hit compound. Furthermore, the hit exhibited an anti-neuroinflammatory effect in vitro and in vivo by inhibiting PKM2-mediated glycolysis and NLRP3 activation, indicating PKM2 as a novel target for neuroinflammation and its related brain disorders. This hit compound has a better safety profile compared to shikonin, a reported PKM2 inhibitor, identifying it as a lead compound in targeting PKM2 for the treatment of inflammation-related diseases.
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Affiliation(s)
- Cheng-Long Gao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, China
| | - Gui-Ge Hou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,School of Pharmacy, The Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Binzhou Medical University, Yantai, 264003, China
| | - Jin Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China
| | - Tong Ru
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China
| | - Ya-Zhou Xu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, China
| | - Shun-Yi Zhao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, China
| | - Hui Ye
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, China
| | - Lu-Yong Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, China
| | - Kai-Xian Chen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, China
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, China
| | - Tao Pang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, China
| | - Xu-Wen Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, Shanghai, 201203, China.,Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology (Qingdao), 1 Wenhai Road, Aoshanwei, Jimo, Qingdao, 266237, China
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11
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Synthesis and Target Identification of Benzoxepane Derivatives as Potential Anti‐Neuroinflammatory Agents for Ischemic Stroke. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Dana S, Chowdhury D, Mandal A, Chipem FAS, Baidya M. Ruthenium(II) Catalysis/Noncovalent Interaction Synergy for Cross-Dehydrogenative Coupling of Arene Carboxylic Acids. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03392] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Suman Dana
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Deepan Chowdhury
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Anup Mandal
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | | | - Mahiuddin Baidya
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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Zhang L, Zhu L, Zhang Y, Yang Y, Wu Y, Ma W, Lan Y, You J. Experimental and Theoretical Studies on Ru(II)-Catalyzed Oxidative C–H/C–H Coupling of Phenols with Aromatic Amides Using Air as Oxidant: Scope, Synthetic Applications, and Mechanistic Insights. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02816] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Luoqiang Zhang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China
| | - Yuming Zhang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Yudong Yang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Yimin Wu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Weixin Ma
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
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14
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Tanahashi T. [Diversity of Secondary Metabolites from Some Medicinal Plants and Cultivated Lichen Mycobionts]. YAKUGAKU ZASSHI 2018; 137:1443-1482. [PMID: 29199255 DOI: 10.1248/yakushi.17-00147] [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] [Indexed: 11/22/2022]
Abstract
Studies on the structural determination, biosynthesis, and biological activities of secondary metabolites from natural sources are significant in the field of natural products chemistry. This review focuses on diverse secondary metabolites isolated from medicinal plants and cultivated mycobionts of lichens in our laboratory. Monoterpene-tetrahydroisoquinoline glycosides and alkaloids isolated from Cephaelis acuminata and Alangium lamarckii gave important information on the biosynthesis of ipecac alkaloids. A variety of glycosides linked with a secologanin unit and indole alkaloids were obtained from medicinal plants belonging to the families of Rubiaceae, Apocynaceae, and Loganiaceae. Plant species of the four genera Fraxinus, Syringa, Jasminum, and Ligustrum of the family Oleaceae were chemically investigated to provide several types of secoiridoid and iridoid glucosides. The biosynthetic pathway leading from protopine to benzophenanthridine alkaloids in suspension cell cultures of Eschscholtzia californica was elucidated. The structures and biological activities of the bisbenzylisoquinoline alkaloids of Stephania cepharantha and Nelumbo nucifera were also investigated. In addition, the mycobionts of lichens were cultivated to afford various types of metabolites that differ from the lichen substances of intact lichens but are structurally similar to fungal metabolites. The biosynthetic origins of some metabolites were also studied. These findings suggest that cultures of lichen mycobionts could be sources of new bioactive compounds and good systems for investigating secondary metabolism in lichens.
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Awad GEA, Abd El Aty AA, Shehata AN, Hassan ME, Elnashar MM. Covalent immobilization of microbial naringinase using novel thermally stable biopolymer for hydrolysis of naringin. 3 Biotech 2016; 6:14. [PMID: 28330084 PMCID: PMC4703588 DOI: 10.1007/s13205-015-0338-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 07/07/2015] [Indexed: 12/02/2022] Open
Abstract
Naringinase induced from the fermented broth of marine-derived fungus Aspergillus niger was immobilized into grafted gel beads, to obtain biocatalytically active beads. The support for enzyme immobilization was characterized by ART-FTIR and TGA techniques. TGA revealed a significant improvement in the grafted gel's thermal stability from 200 to 300 °C. Optimization of the enzyme loading capacity increased gradually by 28-fold from 32 U/g gel to 899 U/g gel beads, retaining 99 % of the enzyme immobilization efficiency and 88 % of the immobilization yield. The immobilization process highly improved the enzyme's thermal stability from 50 to 70 °C, which is favored in food industries, and reusability test retained 100 % of the immobilized enzyme activity after 20 cycles. These results are very useful on the marketing and industrial levels.
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Affiliation(s)
- Ghada E A Awad
- Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Giza, Egypt
| | - Abeer A Abd El Aty
- Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Giza, Egypt.
| | - Abeer N Shehata
- Biochemistry Department, National Research Centre, Dokki, Giza, Egypt.
| | - Mohamed E Hassan
- Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Giza, Egypt
- Encapsulation and Nanobiotechnology Group, Center of Excellence, National Research Centre, Dokki, Giza, Egypt
| | - Magdy M Elnashar
- Biomedical Sciences Department, Curtin University, Perth, Australia
- Polymers Department, National Research Centre, Dokki, Giza, Egypt
- Encapsulation and Nanobiotechnology Group, Center of Excellence, National Research Centre, Dokki, Giza, Egypt
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Tan D, Xu M, Xu Z, Wu Y, You J. Several Enantiopure Chiral Building Blocks Derived fromD-Mannose and a Formal Synthesis of Dubiusamine C. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201600050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Mostafa FA, Abd El Aty AA, Hamed ER, Eid BM, Ibrahim NA. Enzymatic, kinetic and anti-microbial studies on Aspergillus terreus culture filtrate and Allium cepa seeds extract and their potent applications. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2016. [DOI: 10.1016/j.bcab.2016.01.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Zhang XS, Zhang YF, Li ZW, Luo FX, Shi ZJ. Synthesis of Dibenzo[c,e]oxepin-5(7H)-ones from Benzyl Thioethers and Carboxylic Acids: Rhodium-Catalyzed Double CH Activation Controlled by Different Directing Groups. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500486] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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20
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Zhang XS, Zhang YF, Li ZW, Luo FX, Shi ZJ. Synthesis of Dibenzo[c,e]oxepin-5(7H)-ones from Benzyl Thioethers and Carboxylic Acids: Rhodium-Catalyzed Double CH Activation Controlled by Different Directing Groups. Angew Chem Int Ed Engl 2015; 54:5478-82. [DOI: 10.1002/anie.201500486] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Indexed: 01/23/2023]
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21
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Ramachary DB, Venkaiah C, Reddy YV. High-yielding sequential one-pot synthesis of chiral and achiral α-substituted acrylates via a metal-free reductive coupling reaction. Org Biomol Chem 2014; 12:5400-6. [PMID: 24934801 DOI: 10.1039/c4ob00667d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A general process for the high-yielding synthesis of substituted chiral and achiral α-substituted acrylates was achieved through the sequential one-pot combination of a metal-free reductive coupling reaction followed by an Eschenmoser methylenation. The proline catalyzed reaction of Meldrum's acid, aldehydes and Hantzsch ester followed by methylenation was successful with Eschenmoser's salt in the presence of an alcohol solvent. Herein, we have shown the high-yielding synthesis of privileged building blocks from chiral/achiral α-substituted acrylates and shown them to be very good intermediates in the pharmaceuticals and natural products synthesis.
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Overy DP, Bayman P, Kerr RG, Bills GF. An assessment of natural product discovery from marine ( sensu strictu) and marine-derived fungi. Mycology 2014; 5:145-167. [PMID: 25379338 PMCID: PMC4205923 DOI: 10.1080/21501203.2014.931308] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 05/30/2014] [Indexed: 11/21/2022] Open
Abstract
The natural products community has been investigating secondary metabolites from marine fungi for several decades, but when one attempts to search for validated reports of new natural products from marine fungi, one encounters a literature saturated with reports from ‘marine-derived’ fungi. Of the 1000+ metabolites that have been characterized to date, only approximately 80 of these have been isolated from species from exclusively marine lineages. These metabolites are summarized here along with the lifestyle and habitats of their producing organisms. Furthermore, we address some of the reasons for the apparent disconnect between the stated objectives of discovering new chemistry from marine organisms and the apparent neglect of the truly exceptional obligate marine fungi. We also offer suggestions on how to reinvigorate enthusiasm for marine natural products discovery from fungi from exclusive marine lineages and highlight the need for critically assessing the role of apparently terrestrial fungi in the marine environment.
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Affiliation(s)
- David P Overy
- Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , Prince Edward Island , Canada C1A 4P3 ; Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island , 550 University Ave., Charlottetown , Prince Edward Island , Canada C1A 4P3 ; Nautilus Biosciences Canada, Duffy Research Center, University of Prince Edward Island , 550 University Ave., Charlottetown , Prince Edward Island , Canada C1A 4P3
| | - Paul Bayman
- Department of Biology, University of Puerto Rico-Río Piedras , P. O. Box 23360, San Juan 00931 , Puerto Rico
| | - Russell G Kerr
- Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , Prince Edward Island , Canada C1A 4P3 ; Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island , 550 University Ave., Charlottetown , Prince Edward Island , Canada C1A 4P3 ; Nautilus Biosciences Canada, Duffy Research Center, University of Prince Edward Island , 550 University Ave., Charlottetown , Prince Edward Island , Canada C1A 4P3
| | - Gerald F Bills
- Texas Therapeutics Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center , 1881 East Rd., Houston , TX 77054 , USA
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Mao Z, Luo R, Luo H, Tian J, Liu H, Yue Y, Wang M, Peng Y, Zhou L. Separation and purification of bioactive botrallin and TMC-264 by a combination of HSCCC and semi-preparative HPLC from endophytic fungus Hyalodendriella sp. Ponipodef12. World J Microbiol Biotechnol 2014; 30:2533-42. [PMID: 24898177 DOI: 10.1007/s11274-014-1678-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 05/27/2014] [Indexed: 01/06/2023]
Abstract
Two dibenzo-α-pyrones, botrallin (1) and TMC-264 (2) were preparatively separated from crude ethyl acetate extract of the endophytic fungus Hyalodendriella sp. Ponipodef12, which was isolated from the hybrid 'Neva' of Populus deltoides Marsh × P. nigra L. using a combination of high-speed counter-current chromatography (HSCCC) and semi-preparative HPLC. Botrallin (1) with 74.73% of purity and TMC-264 (2) with 82.29% of purity were obtained through HSCCC by employing a solvent system containing n-hexane-ethyl acetate-methanol-water at a volume ratio of 1.2:1.0:0.9:1.0. It was the first time for TMC-264 (2) to be isolated from this fungus. TMC-264 (2) showed strong antimicrobial and antinematodal activity, and botrallin (1) exhibited moderate inhibitory activity on acetylcholinesterase.
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Affiliation(s)
- Ziling Mao
- MOA Key Laboratory of Plant Pathology, Department of Plant Pathology, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
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Optimization of inulinase production from low cost substrates using Plackett–Burman and Taguchi methods. Carbohydr Polym 2014; 102:261-8. [DOI: 10.1016/j.carbpol.2013.11.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 10/19/2013] [Accepted: 11/02/2013] [Indexed: 11/22/2022]
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25
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Ophiobolins P-T, five new cytotoxic and antibacterial sesterterpenes from the endolichenic fungus Ulocladium sp. Fitoterapia 2013; 90:220-7. [PMID: 23954177 DOI: 10.1016/j.fitote.2013.08.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 08/01/2013] [Accepted: 08/05/2013] [Indexed: 11/20/2022]
Abstract
Five ophiobolane sesterterpenes, ophiobolins P-T, and three known compounds, 6-epi-21,21-O-dihydroophiobolin G, 6-epi-ophiobolin G and 6-epi-ophiobolin K, were isolated from the acetone extract of the endolichenic fungus Ulocladium sp. by using OSMAC method. Their structures were elucidated on the basis of spectroscopic analysis. The absolute configuration of the 18,19-diol moieties in ophiobolin Q was assigned using the Frelek's method. The cytotoxic effects on KB and HepG2 cell lines, antibacterial activity against Bacillus subtilis, methicillin-resistant Staphylococcus aureus, and Bacille Calmette-Guerin were evaluated for all isolated compounds. Ophiobolin T and 6-epi-ophiobolin G exhibited the most potent cytotoxic activity against HepG2 with IC₅₀ of 0.24 and 0.37 μM, respectively. In antibacterial assay, ophiobolins P and T showed moderate antibacterial activity against B. subtilis and meticillin-resistant S. aureus. Ophiobolin T also displayed moderate antibacterial activity against the Bacille Calmette-Guerin strain.
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26
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Bharate SB, Sawant SD, Singh PP, Vishwakarma RA. Kinase inhibitors of marine origin. Chem Rev 2013; 113:6761-815. [PMID: 23679846 DOI: 10.1021/cr300410v] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sandip B Bharate
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine (Council of Scientific and Industrial Research), Canal Road, Jammu-180001, India
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27
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Gulder TAM, Hong H, Correa J, Egereva E, Wiese J, Imhoff JF, Gross H. Isolation, structure elucidation and total synthesis of lajollamide A from the marine fungus Asteromyces cruciatus. Mar Drugs 2013; 10:2912-35. [PMID: 23342379 PMCID: PMC3528133 DOI: 10.3390/md10122912] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The marine-derived filamentous fungus Asteromyces cruciatus 763, obtained off the coast of La Jolla, San Diego, USA, yielded the new pentapeptide lajollamide A (1), along with the known compounds regiolone (2), hyalodendrin (3), gliovictin (4), 1N-norgliovicitin (5), and bis-N-norgliovictin (6). The planar structure of lajollamide A (1) was determined by Nuclear Magnetic Resonance (NMR) spectroscopy in combination with mass spectrometry. The absolute configuration of lajollamide A (1) was unambiguously solved by total synthesis which provided three additional diastereomers of 1 and also revealed that an unexpected acid-mediated partial racemization (2:1) of the L-leucine and L-N-Me-leucine residues occurred during the chemical degradation process. The biological activities of the isolated metabolites, in particular their antimicrobial properties, were investigated in a series of assay systems.
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Affiliation(s)
- Tobias A. M. Gulder
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk Str. 1, Bonn 53121, Germany; E-Mail:
- Authors to whom correspondence should be addressed; E-Mails: (T.A.M.G.); (H.G.); Tel.: +49-228-735797 (T.A.M.G.); Fax: +49-228-739712 (T.A.M.G.); Tel.: +49-7071-2976970 (H.G.); Fax: +49-7071-295250 (H.G.)
| | - Hanna Hong
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk Str. 1, Bonn 53121, Germany; E-Mail:
| | - Jhonny Correa
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, Bonn 53115, Germany; E-Mails: (J.C.); (E.E.)
| | - Ekaterina Egereva
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, Bonn 53115, Germany; E-Mails: (J.C.); (E.E.)
| | - Jutta Wiese
- Kieler Wirkstoff-Zentrum (KiWiZ) at the Helmholtz-Zentrum für Ozeanforschung GEOMAR, Am Kiel-Kanal 44, Kiel 24106, Germany; E-Mails: (J.W.); (J.F.I.)
| | - Johannes F. Imhoff
- Kieler Wirkstoff-Zentrum (KiWiZ) at the Helmholtz-Zentrum für Ozeanforschung GEOMAR, Am Kiel-Kanal 44, Kiel 24106, Germany; E-Mails: (J.W.); (J.F.I.)
| | - Harald Gross
- Institute for Pharmaceutical Biology, University of Tübingen, Auf der Morgenstelle 8, Tübingen 72076, Germany
- Authors to whom correspondence should be addressed; E-Mails: (T.A.M.G.); (H.G.); Tel.: +49-228-735797 (T.A.M.G.); Fax: +49-228-739712 (T.A.M.G.); Tel.: +49-7071-2976970 (H.G.); Fax: +49-7071-295250 (H.G.)
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28
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Gomoiu I, Chatzitheodoridis E, Vadrucci S, Walther I. The effect of spaceflight on growth of Ulocladium chartarum colonies on the international space station. PLoS One 2013; 8:e62130. [PMID: 23637980 PMCID: PMC3634740 DOI: 10.1371/journal.pone.0062130] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 03/19/2013] [Indexed: 11/18/2022] Open
Abstract
The objectives of this 14 days experiment were to investigate the effect of spaceflight on the growth of Ulocladium chartarum, to study the viability of the aerial and submerged mycelium and to put in evidence changes at the cellular level. U. chartarum was chosen for the spaceflight experiment because it is well known to be involved in biodeterioration of organic and inorganic substrates covered with organic deposits and expected to be a possible contaminant in Spaceships. Colonies grown on the International Space Station (ISS) and on Earth were analysed post-flight. This study clearly indicates that U. chartarum is able to grow under spaceflight conditions developing, as a response, a complex colony morphotype never mentioned previously. We observed that spaceflight reduced the rate of growth of aerial mycelium, but stimulated the growth of submerged mycelium and of new microcolonies. In Spaceships and Space Stations U. chartarum and other fungal species could find a favourable environment to grow invasively unnoticed in the depth of surfaces containing very small amount of substrate, posing a risk factor for biodegradation of structural components, as well as a direct threat for crew health. The colony growth cycle of U. chartarum provides a useful eukaryotic system for the study of fungal growth under spaceflight conditions.
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Affiliation(s)
- Ioana Gomoiu
- Institute of Biology Bucharest, Romanian Academy of Science, Bucharest, Romania.
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29
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Lysilactones A–C, three 6H-dibenzo[b,d]pyran-6-one glycosides from Lysimachia clethroides, total synthesis of Lysilactone A. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Pinto E, Afonso C, Duarte S, Vale-Silva L, Costa E, Sousa E, Pinto M. Antifungal activity of xanthones: evaluation of their effect on ergosterol biosynthesis by high-performance liquid chromatography. Chem Biol Drug Des 2011; 77:212-22. [PMID: 21244637 DOI: 10.1111/j.1747-0285.2010.01072.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The increasing resistance of pathogenic fungi to antifungal compounds and the reduced number of available drugs led to the search for therapeutic alternatives among natural products, including xanthones. The antifungal activity of 27 simple oxygenated xanthones was evaluated by determination of their minimal inhibitory concentration on clinical and type strains of Candida, Cryptococcus, Aspergillus and dermatophytes, and their preponderance on the dermatophytic filamentous fungi was observed. Furthermore, a simple and efficient HPLC method with UV detection to study the effect of the active xanthones on the biosynthesis of ergosterol was developed and validated. Using this methodology, the identification and quantification of fungal sterols in whole cells of Candida albicans, Cryptococcus neoformans, Aspergillus fumigatus, and Trichophyton mentagrophytes were accomplished. In summary, 1,2-dihydroxyxanthone was found to be the most active compound against all strains tested, showing its effect on sterol biosynthesis by reducing the amount of ergosterol detected.
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Affiliation(s)
- Eugénia Pinto
- Research Center of Medicinal Chemistry - University of Porto (CEQUIMED-UP), R. Aníbal Cunha, 164, 4050-047, Porto, Portugal.
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Thomas TRA, Kavlekar DP, LokaBharathi PA. Marine drugs from sponge-microbe association--a review. Mar Drugs 2010; 8:1417-68. [PMID: 20479984 PMCID: PMC2866492 DOI: 10.3390/md8041417] [Citation(s) in RCA: 245] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 04/13/2010] [Accepted: 04/19/2010] [Indexed: 12/31/2022] Open
Abstract
The subject of this review is the biodiversity of marine sponges and associated microbes which have been reported to produce therapeutically important compounds, along with the contextual information on their geographic distribution. Class Demospongiae and the orders Halichondrida, Poecilosclerida and Dictyoceratida are the richest sources of these compounds. Among the microbial associates, members of the bacterial phylum Actinobacteria and fungal division Ascomycota have been identified to be the dominant producers of therapeutics. Though the number of bacterial associates outnumber the fungal associates, the documented potential of fungi to produce clinically active compounds is currently more important than that of bacteria. Interestingly, production of a few identical compounds by entirely different host-microbial associations has been detected in both terrestrial and marine environments. In the Demospongiae, microbial association is highly specific and so to the production of compounds. Besides, persistent production of bioactive compounds has also been encountered in highly specific host-symbiont associations. Though spatial and temporal variations are known to have a marked effect on the quality and quantity of bioactive compounds, only a few studies have covered these dimensions. The need to augment production of these compounds through tissue culture and mariculture has also been stressed. The reviewed database of these compounds is available at www.niobioinformatics.in/drug.php.
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Affiliation(s)
- Tresa Remya A. Thomas
- Biological Oceanography, National Institute of Oceanography, Dona Paula, Goa, Pin-403004, India; E-Mails:
(T.R.A.T.);
(D.P.K.)
| | - Devanand P. Kavlekar
- Biological Oceanography, National Institute of Oceanography, Dona Paula, Goa, Pin-403004, India; E-Mails:
(T.R.A.T.);
(D.P.K.)
| | - Ponnapakkam A. LokaBharathi
- Biological Oceanography, National Institute of Oceanography, Dona Paula, Goa, Pin-403004, India; E-Mails:
(T.R.A.T.);
(D.P.K.)
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Altemöller M, Gehring T, Cudaj J, Podlech J, Goesmann H, Feldmann C, Rothenberger A. Total Synthesis of Graphislactones A, C, D, and H, of Ulocladol, and of the Originally Proposed and Revised Structures of Graphislactones E and F. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801278] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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33
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Abe H, Harayama T, Arai M, Takeuchi Y. Preparation of 5H,7H-Dibenz[c,e]oxepin-5-one Derivative through Reconstruction of the Lactone Ring. HETEROCYCLES 2009. [DOI: 10.3987/com-08-s(f)117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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A tropical marine microbial natural products geobibliography as an example of desktop exploration of current research using web visualisation tools. Mar Drugs 2008; 6:550-77. [PMID: 19172194 PMCID: PMC2630847 DOI: 10.3390/md20080028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 10/09/2008] [Accepted: 10/09/2008] [Indexed: 11/17/2022] Open
Abstract
Microbial marine biodiscovery is a recent scientific endeavour developing at a time when information and other technologies are also undergoing great technical strides. Global visualisation of datasets is now becoming available to the world through powerful and readily available software such as Worldwind, ArcGIS Explorer and Google Earth. Overlaying custom information upon these tools is within the hands of every scientist and more and more scientific organisations are making data available that can also be integrated into these global visualisation tools. The integrated global view that these tools enable provides a powerful desktop exploration tool. Here we demonstrate the value of this approach to marine microbial biodiscovery by developing a geobibliography that incorporates citations on tropical and near-tropical marine microbial natural products research with Google Earth and additional ancillary global data sets. The tools and software used are all readily available and the reader is able to use and install the material described in this article.
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Aly AH, Edrada-Ebel R, Indriani ID, Wray V, Müller WEG, Totzke F, Zirrgiebel U, Schächtele C, Kubbutat MHG, Lin WH, Proksch P, Ebel R. Cytotoxic metabolites from the fungal endophyte Alternaria sp. and their subsequent detection in its host plant Polygonum senegalense. JOURNAL OF NATURAL PRODUCTS 2008; 71:972-980. [PMID: 18494522 DOI: 10.1021/np070447m] [Citation(s) in RCA: 150] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
From the Egyptian medicinal plant Polygonum senegalense the fungal endophyte Alternaria sp. was isolated. Extracts of the fungus grown either in liquid culture or on solid rice media exhibited cytotoxic activity when tested in vitro against L5178Y cells. Chromatographic separation of the extracts yielded 15 natural products, out of which seven were new compounds, with both fungal extracts differing considerably with regard to their secondary metabolites. Compounds 1, 2, 3, 6, and 7 showed cytotoxic activity with EC 50 values ranging from 1.7 to 7.8 microg/mL. When analyzed in vitro for their inhibitory potential against 24 different protein kinases, compounds 1- 3, 5- 8, and 15 inhibited several of these enzymes (IC 50 values 0.22-9.8 microg/mL). Interestingly, compounds 1, 3, and 6 were also identified as constituents of an extract derived from healthy leaves of the host plant P. senegalense, thereby indicating that the production of natural products by the endophyte proceeds also under in situ conditions within the plant host.
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Affiliation(s)
- Amal H Aly
- Institut für Pharmazeutische Biologie and Biotechnologie, Heinrich-Heine-Universität, Universitätsstrasse 1, Geb. 26.23, D-40225 Düsseldorf, Germany
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36
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König GM, Kehraus S, Seibert SF, Abdel-Lateff A, Müller D. Natural products from marine organisms and their associated microbes. Chembiochem 2006; 7:229-38. [PMID: 16247831 DOI: 10.1002/cbic.200500087] [Citation(s) in RCA: 164] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The marine environment is distinguished by unique groups of organisms being the source of a wide array of fascinating structures. The enormous biodiversity of marine habitats is mirrored by the molecular diversity of secondary metabolites found in marine animals, plants and microbes. The recognition that many marine invertebrates contain endo- and epibiotic microorganisms and that some invertebrate-derived natural products are structurally related to bacterial metabolites suggests a microbial origin for some of these compounds. Other marine natural products, however, are clearly located in invertebrate tissue and microbial involvement in the biosynthetic process seems unlikely. The complexity of associations in marine organisms, especially in sponges, bryozoans and tunicates, makes it extremely difficult to definitively state the biosynthetic source of many marine natural products or to deduce their ecological significance. Whereas many symbiotic marine microorganisms cannot be isolated and cultured, numerous epi- and endobiotic marine fungi produce novel secondary metabolites in laboratory cultures. The potent biological activity of many marine natural products is of relevance for their ecological function but is also the basis of their biomedical importance.
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Affiliation(s)
- Gabriele M König
- Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany.
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Bhadury P, Mohammad BT, Wright PC. The current status of natural products from marine fungi and their potential as anti-infective agents. J Ind Microbiol Biotechnol 2006; 33:325-37. [PMID: 16429315 DOI: 10.1007/s10295-005-0070-3] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Accepted: 12/07/2005] [Indexed: 11/24/2022]
Abstract
A growing number of marine fungi are the sources of novel and potentially life-saving bioactive secondary metabolites. Here, we have discussed some of these novel antibacterial, antiviral, antiprotozoal compounds isolated from marine-derived fungi and their possible roles in disease eradication. We have also discussed the future commercial exploitation of these compounds for possible drug development using metabolic engineering and post-genomics approaches.
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Affiliation(s)
- Punyasloke Bhadury
- Plymouth Marine Laboratory, Prospect Place, The Hoe, PL1 3DH, Plymouth, UK
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