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Kumar P, Wallis M, Zhou X, Li F, Holland DC, Reddell P, Münch G, Raju R. Triplinones A-H: Anti-Inflammatory Arylalkenyl α,β-Unsaturated-δ-Lactones Isolated from the Leaves of Australian Rainforest Plant Cryptocarya triplinervis (Lauraceae). JOURNAL OF NATURAL PRODUCTS 2024. [PMID: 38964296 DOI: 10.1021/acs.jnatprod.4c00454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
Our ongoing exploration of Australian rainforest plants for the biodiscovery of anti-inflammatory agents led to the isolation and structural elucidation of eight new arylalkenyl α,β-unsaturated-δ-lactones, triplinones A-H (1-8), from the leaves of the Australian rainforest plant Cryptocarya triplinervis B. Hyland (Lauraceae). The chemical structures of these compounds were established by NMR spectroscopic data analysis, while their relative and absolute configurations were established using a combination of Mosher ester analysis utilizing both Riguera's and Kishi's methods, ECD experiments, and X-ray crystallography analysis. Compounds 1-8 exhibited good inhibitory activities toward nitric oxide (NO) production in lipopolysaccharide (LPS) and interferon (IFN)-γ induced RAW 264.7 macrophages, in particular compounds 1-3 and 5, with IC50 values of 7.3 ± 0.5, 6.0 ± 0.3, 5.6 ± 0.3, and 5.4 ± 2.5 μM, respectively.
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Affiliation(s)
- Paayal Kumar
- Department of Pharmacology, Western Sydney University, Campbelltown Campus, Sydney, NSW 2751, Australia
| | - Matthew Wallis
- School of Science, Western Sydney University, Penrith, Sydney, NSW 2751, Australia
| | - Xian Zhou
- NICM Health Research Institute, Western Sydney University, Westmead, NSW 2145, Australia
| | - Feng Li
- School of Science, Western Sydney University, Penrith, Sydney, NSW 2751, Australia
| | - Darren C Holland
- School of Molecular Sciences, University of Western Australia, Perth, WA 6009, Australia
| | - Paul Reddell
- QBiotics Ltd, PO Box 1, Yungaburra, Queensland 4066, Australia
| | - Gerald Münch
- Department of Pharmacology, Western Sydney University, Campbelltown Campus, Sydney, NSW 2751, Australia
- NICM Health Research Institute, Western Sydney University, Westmead, NSW 2145, Australia
| | - Ritesh Raju
- Department of Pharmacology, Western Sydney University, Campbelltown Campus, Sydney, NSW 2751, Australia
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Nishino H, Kanda N, Zhang BT, Kamio M, Uchida H, Sugahara K, Nagai H, Satake M. Okeanic acid-A, a trihydroxy fatty acid from the Okinawan cyanobacterium Okeania hirsuta. Nat Prod Res 2024:1-8. [PMID: 38300791 DOI: 10.1080/14786419.2024.2308724] [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: 11/29/2023] [Accepted: 01/16/2024] [Indexed: 02/03/2024]
Abstract
Trihydroxy fatty acids are oxidative metabolites of polyunsaturated fatty acids isolated from plants, bacteria, fungi, and microalgae and have a variety of biological activities. In this study, a new trihydroxy fatty acid, okeanic acid-A (1), was isolated together with malyngic acid (2) and 15,16-dihydromalyngic acid (3) from the cyanobacterium Okeania hirsuta collected in Okinawa, Japan. The planar structure of 1 was elucidated by detailed analyses using high-resolution ESI-MS and 1D and 2D NMR spectroscopy. The absolute configurations of the hydroxy groups in 1 were determined unambiguously by chemical derivatisation and a modified Mosher's method. These cyanobacterial trihydroxy fatty acids (1-3) have identical configurations at their respective trihydroxy parts. Okeanic acid-A (1) showed mild growth-inhibitory activity against the marine diatom Nitzschia amabilis.
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Affiliation(s)
- Haruka Nishino
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Nao Kanda
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Bo-Tao Zhang
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Michiya Kamio
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Hajime Uchida
- Fisheries Technology Institute, Japan Fisheries Research and Education Agency, Yokohama, Japan
| | - Kohtaro Sugahara
- Suntory Foundation for Life Sciences, Bioorganic Research Institute, Kyoto, Japan
| | - Hiroshi Nagai
- Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan
| | - Masayuki Satake
- Department of Chemistry, School of Science, The University of Tokyo, Tokyo, Japan
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3
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Velado M, Martinović M, Alonso I, Tortosa M, Fernández de la Pradilla R, Viso A. Base-Induced Sulfoxide-Sulfenate Rearrangement of 2-Sulfinyl Dienes for the Regio- and Stereoselective Synthesis of Enantioenriched Dienyl Diols. J Org Chem 2023; 88:3697-3713. [PMID: 36868575 PMCID: PMC10028699 DOI: 10.1021/acs.joc.2c02931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
The base-induced [2,3]-sigmatropic rearrangement of a series of enantiopure 2-sulfinyl dienes has been examined and optimized using a combination of NaH and iPrOH. The reaction takes place by allylic deprotonation of the 2-sulfinyl diene to give a bis-allylic sulfoxide anion intermediate that after protonation undergoes sulfoxide-sulfenate rearrangement. Different substitution at the starting 2-sulfinyl dienes has allowed us to study the rearrangement finding that a terminal allylic alcohol is determinant to achieve complete regioselectivity and high enantioselectivities (90:10-95:5) with the sulfoxide as the only element of stereocontrol. Density functional theory (DFT) calculations provide an interpretation of these results.
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Affiliation(s)
- Marina Velado
- Instituto de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Manuel Martinović
- Instituto de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Inés Alonso
- Organic Chemistry Department and Center for Innovation in Advanced Chemistry (ORFEO-CINQA) Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - Mariola Tortosa
- Organic Chemistry Department and Center for Innovation in Advanced Chemistry (ORFEO-CINQA) Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | | | - Alma Viso
- Instituto de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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4
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Glycosylated and Succinylated Macrocyclic Lactones with Amyloid-β-Aggregation-Regulating Activity from a Marine Bacillus sp. Mar Drugs 2023; 21:md21020067. [PMID: 36827108 PMCID: PMC9962899 DOI: 10.3390/md21020067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 01/22/2023] Open
Abstract
Two new glycosylated and succinylated macrocyclic lactones, succinyl glyco-oxydifficidin (1) and succinyl macrolactin O (2), were isolated from a Bacillus strain collected from an intertidal mudflat on Anmyeon Island in Korea. The planar structures of 1 and 2 were proposed using mass spectrometric analysis and NMR spectroscopic data. The absolute configurations of 1 and 2 were determined by optical rotation, J-based configuration analysis, chemical derivatizations, including the modified Mosher's method, and quantum-mechanics-based calculation. Biological evaluation of 1 and 2 revealed that succinyl glyco-oxydifficidin (1) inhibited/dissociated amyloid β (Aβ) aggregation, whereas succinyl macrolactin O (2) inhibited Aβ aggregation, indicating their therapeutic potential for disassembling and removing Aβ aggregation.
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Hwang GJ, Jang M, Son S, Kim GS, Lee B, Heo KT, Kim GJ, Choi H, Hur JS, Jang JP, Ko SK, Hong YS, Ahn JS, Jang JH. Ulleungdolin, a Polyketide-Peptide Hybrid Bearing a 2,4-Di- O-methyl-β-d-antiarose from Streptomyces sp. 13F051 Co-cultured with Leohumicola minima 15S071. JOURNAL OF NATURAL PRODUCTS 2022; 85:2445-2453. [PMID: 36197044 DOI: 10.1021/acs.jnatprod.2c00682] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A new secondary metabolite, ulleungdolin (1), was isolated from the co-culture of an actinomycete, Streptomyces sp. 13F051, and a fungus, Leohumicola minima 15S071. Based on the NMR, UV, and MS data, it was deduced that the planar structure of 1 comprised an isoindolinone (IsoID) with an octanoic acid, a tripeptide, and a sugar. The tripeptide has the unprecedented amino acids norcoronamic acid, 3-hydroxy-glutamine, and 4-hydroxy-phenylglycine and is linked by a C-N bond with IsoID. The absolute configurations were determined by chemical derivatization, extensive spectroscopic methods, and electronic circular dichroism calculations and supported by bioinformatic analyses. Bioactivity evaluation studies indicated that 1 had an antimigration effect on MDA-MB-231 breast cancer cells.
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Affiliation(s)
- Gwi Ja Hwang
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, South Korea
| | - Mina Jang
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, South Korea
| | - Sangkeun Son
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Antimicrobial Discovery Center, Department of Biology, Northeastern University, Boston, Massachusetts 02115, United States
| | - Gil Soo Kim
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, South Korea
| | - Byeongsan Lee
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
| | - Kyung Taek Heo
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, South Korea
| | - Geum Jin Kim
- College of Pharmacy and Institute of Cell Culture, Yeungnam University, Gyeongsan 38541, South Korea
| | - Hyukjae Choi
- College of Pharmacy and Institute of Cell Culture, Yeungnam University, Gyeongsan 38541, South Korea
| | - Jae-Seoun Hur
- Korean Lichen Research Institute, Sunchon National University, Suncheon 57922, South Korea
| | - Jun-Pil Jang
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
| | - Sung-Kyun Ko
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, South Korea
| | - Young-Soo Hong
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, South Korea
| | - Jong Seog Ahn
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, South Korea
| | - Jae-Hyuk Jang
- Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, South Korea
- Department of Biomolecular Science, KRIBB School of Bioscience, University of Science and Technology, Daejeon 34141, South Korea
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6
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Phenolic Metabolites from a Deep-Sea-Derived Fungus Aspergillus puniceus A2 and Their Nrf2-Dependent Anti-Inflammatory Effects. Mar Drugs 2022; 20:md20090575. [PMID: 36135764 PMCID: PMC9505415 DOI: 10.3390/md20090575] [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: 08/18/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
Four undescribed phenolic compounds, namely asperpropanols A–D (1–4), along with two known congeners 5 and 6, were isolated from Aspergillus puniceus A2, a deep-sea-derived fungus. The gross structures of the compounds were established by detailed analyses of the HRESIMS and NMR data, and their absolute configurations were resolved by modified Mosher’s method and calculations of ECD data. Compounds 1–6 were found to have excellent anti-inflammatory effect on lipopolysaccharide (LPS)-induced RAW264.7 cells at 20 μM, evidenced by the reduced nitric oxide (NO), tumor necrosis factor α, and interleukin 6 production. Among them, 5 and 6 showed inhibitory effects on NO production comparable with the positive control (BAY11-7083 at 10 μM). Additionally, the LPS-induced mRNA expressions of inducible nitric oxide synthase and cyclooxygenase-2 were also decreased. Interestingly, mRNA expression of nuclear factor erythroid 2–related factor 2 (Nrf2) was downregulated by LPS and recovered by 1–6, suggesting a vital role of Nrf2 in their effect. We further found that pharmacological inhibition of Nrf2 by ML385 largely abrogated the effects of 1–6 on RAW264.7 cells. Therefore, 1–6 may share a common anti-inflammatory mechanism via Nrf2 upregulation and activation.
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Lee SR, Seyedsayamdost MR. Induction of Diverse Cryptic Fungal Metabolites by Steroids and Channel Blockers. Angew Chem Int Ed Engl 2022; 61:e202204519. [PMID: 35509119 PMCID: PMC9276648 DOI: 10.1002/anie.202204519] [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: 03/28/2022] [Indexed: 07/20/2023]
Abstract
Fungi offer a deep source of natural products but remain underutilized. Most biosynthetic gene clusters (BGCs) that can be detected are silent or "cryptic" in standard lab cultures and their products are thus not interrogated in routine screens. As genetic alterations are difficult and some strains can only be grown on agar, we have herein applied an agar-based high-throughput chemical genetic screen to identify inducers of fungal BGCs. Using R. solani and S. sclerotiorum as test cases, we report 13 cryptic metabolites in four compound groups, including sclerocyclane, a natural product with a novel scaffold. Steroids were the best elicitors and follow-up studies showed that plant-steroids trigger sclerocyclane synthesis, which shows antibiotic activity against B. plantarii, an ecological competitor of S. sclerotiorum. Our results open new paths to exploring the chemical ecology of fungal-plant interactions and provide a genetics-free approach for uncovering cryptic fungal metabolites.
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Affiliation(s)
- Seoung Rak Lee
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Mohammad R Seyedsayamdost
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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8
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Lee SR, Seyedsayamdost MR. Induction of Diverse Cryptic Fungal Metabolites by Steroids and Channel Blockers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Seoung Rak Lee
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | - Mohammad R. Seyedsayamdost
- Department of Chemistry Princeton University Princeton NJ 08544 USA
- Department of Molecular Biology Princeton University Princeton NJ 08544 USA
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9
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Huo C, Han F, Xiao Y, Kim HJ, Lee IS. Microbial Transformation of Yakuchinone A and Cytotoxicity Evaluation of Its Metabolites. Int J Mol Sci 2022; 23:ijms23073992. [PMID: 35409351 PMCID: PMC9000044 DOI: 10.3390/ijms23073992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/01/2022] [Accepted: 04/01/2022] [Indexed: 02/01/2023] Open
Abstract
Yakuchinone A (1) is a bioactive diarylheptanoid isolated from the dried fruits of Alpinia oxyphylla. Microbial transformation has been recognized as an efficient method to produce new biologically active derivatives from natural products. In the present study, microbial transformation of yakuchinone A was performed with the fungus Mucor hiemalis KCTC 26779, which led to the isolation of nine new metabolites (2, 3a, 3b, and 4–9). Their structures were elucidated as (3S)-oxyphyllacinol (2), (3S,7R)- and (3S,7S)-7-hydroxyoxyphyllacinol (3a and 3b), (3S)-oxyphyllacinol-4′-O-β-d-glucopyranoside (4), (3S)-4″-hydroxyoxyphyllacinol (5), (3S)-3″-hydroxyoxyphyllacinol (6), (3S)-2″-hydroxyoxyphyllacinol (7), (3S)-2″-hydroxyoxyphyllacinol-2″-O-β-d-glucopyranoside (8), and (3S)-oxyphyllacinol-3-O-β-d-glucopyranoside (9) based on the comprehensive spectroscopic analyses and the application of modified Mosher’s method. All compounds were evaluated for their cytotoxic activities against melanoma, as well as breast, lung, and colorectal cancer cell lines. Compound 9, which was O-glucosylated on the diarylheptanoid alkyl chain, exhibited the most selective cytotoxic activities against melanoma cell lines with the IC50 values ranging from 6.09 to 9.74 μM, indicating that it might be considered as a possible anti-cancer lead compound.
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Affiliation(s)
- Chen Huo
- College of Pharmacy, Chonnam National University, Gwangju 61186, Korea; (C.H.); (F.H.); (Y.X.)
| | - Fubo Han
- College of Pharmacy, Chonnam National University, Gwangju 61186, Korea; (C.H.); (F.H.); (Y.X.)
| | - Yina Xiao
- College of Pharmacy, Chonnam National University, Gwangju 61186, Korea; (C.H.); (F.H.); (Y.X.)
| | - Hyun Jung Kim
- College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, Muan-gun 58554, Jeonnam, Korea
- Correspondence: (H.J.K.); (I.-S.L.)
| | - Ik-Soo Lee
- College of Pharmacy, Chonnam National University, Gwangju 61186, Korea; (C.H.); (F.H.); (Y.X.)
- Correspondence: (H.J.K.); (I.-S.L.)
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10
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Ge R, Zhu Y, Wang H, Gu S. Methods and Application of Absolute Configuration Assignment for Chiral Compounds. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202108047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Hernandes IS, Da Silva HC, Dos Santos HF, Pereira Ávila E, de almeida MV, Gomes MGR, Paschoal D, De Almeida WB. An Investigation of the Predominant Structure of Antibiotic Azithromycin in Chloroform Solution through NMR and Thermodynamic Analysis. Phys Chem Chem Phys 2022; 24:22845-22858. [DOI: 10.1039/d2cp02843c] [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
Azithromycin (AZM) is a well-known macrolide-type antibiotic that has been used in the treatment of infections and inflammations. Knowledge of the predominant molecular structure in solution is a prerequisite for...
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Jiang ZP, Sun SH, Yu Y, Mándi A, Luo JY, Yang MH, Kurtán T, Chen WH, Shen L, Wu J. Discovery of benthol A and its challenging stereochemical assignment: opening up a new window for skeletal diversity of super-carbon-chain compounds. Chem Sci 2021; 12:10197-10206. [PMID: 34447528 PMCID: PMC8336589 DOI: 10.1039/d1sc02810c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 06/25/2021] [Indexed: 12/28/2022] Open
Abstract
Super-carbon-chain compounds (SCCCs) are marine organic molecules featuring long polyol carbon chains with numerous stereocenters. Polyol-polyene compounds (PPCs) and ladder-frame polyethers (LFPs) are two major families. It is highly challenging to establish the absolute configurations of SCCCs. In this century, few new SCCC families have been reported. Benthol A, an aberrant SCCC, was obtained from a South China Sea benthic dinoflagellate that should belong to a new taxon. Its planar structure and absolute configuration, containing thirty-five carbon stereocenters, were unambiguously established by a combination of extensive NMR spectroscopic investigations, periodate degradation of the 1,2-diol groups, ozonolysis of the carbon-carbon double bonds, J-based configurational analysis, NOE interactions, modified Mosher's MTPA ester method, and DFT-NMR 13C chemical-shift calculations aided by DP4+ statistical analysis. Benthol A displayed potent antimalarial activity against Plasmodium falciparum 3D7 parasites. This new molecule combines extraordinary structural features, particularly eight scattered ether rings on a C72 backbone chain, which places it within a new SCCC family between PPCs and LFPs, herein termed polyol-polyether compounds. This suggestion was strongly supported by principal component analysis. The discovery of benthol A does not only provide new insights into the untapped biosynthetic potential of marine dinoflagellates, but also opens up a new window for skeletal diversity of SCCCs.
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Affiliation(s)
- Zhong-Ping Jiang
- School of Pharmaceutical Sciences, Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 P. R. China
| | - Shi-Hao Sun
- School of Pharmaceutical Sciences, Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 P. R. China
| | - Yi Yu
- Marine Drugs Research Center, College of Pharmacy, Jinan University 601 Huangpu Avenue West Guangzhou 510632 P. R. China
| | - Attila Mándi
- Department of Organic Chemistry, University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Jiao-Yang Luo
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College Beijing 100193 P. R. China
| | - Mei-Hua Yang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College Beijing 100193 P. R. China
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Wen-Hua Chen
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong Province 529020 P. R. China
| | - Li Shen
- Marine Drugs Research Center, College of Pharmacy, Jinan University 601 Huangpu Avenue West Guangzhou 510632 P. R. China
| | - Jun Wu
- School of Pharmaceutical Sciences, Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 P. R. China
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13
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Mattison A, Brown JM, Carmichael D, Alcock NW. Are stable atropisomers possible for meta-meta’ linked biphenols. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Abstract
This review covers the literature published between January and December in 2018 for marine natural products (MNPs), with 717 citations (706 for the period January to December 2018) 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 (1554 in 469 papers for 2018), 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. The proportion of MNPs assigned absolute configuration over the last decade is also surveyed.
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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 and School of Environment and Science, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Michèle R Prinsep
- Chemistry, School of Science, University of Waikato, Hamilton, New Zealand
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New Polyenes from the Marine-Derived Fungus Talaromyces cyanescens with Anti-Neuroinflammatory and Cytotoxic Activities. Molecules 2021; 26:molecules26040836. [PMID: 33562648 PMCID: PMC7915668 DOI: 10.3390/molecules26040836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 11/17/2022] Open
Abstract
Three new polyene compounds, talacyanols A–C (1–3), along with two known compounds, ramulosin (4) and eurothiocin A (5), were isolated from the marine fungus Talaromyces cyanescens derived from a seaweed Caulerpa sp. Structures of 1–5 were established by one-dimensional and two-dimensional (1D/2D) NMR, HR-ESIMS, and the modified Mosher’s methods, as well as comparison with previously reported literature data. All the compounds (1–5) were tested for their in vitro cytotoxic and anti-neuroinflammatory activities. Among them, 1 showed moderate cytotoxic activity against a panel of cancer cell lines (HCT-15, NUGC-3, NCI-H23, ACHN, PC-3, and MDA-MB-231) with GI50 values ranging from 44.4 to 91.6 μM, whereas compounds 2 and 5 exhibited anti-neuroinflammatory effect without cytotoxicity against all the tested cell lines.
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16
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Wu J, Jiang ZP, Yan RJ, Sun SH, Yu Y, Shen L. Gibbosolide A, a highly functionalized 20-membered macrolide with a terminal cis-fused 2-methylhexahydro-2 H-furo[3,2- b]pyran motif: insights into late-stage cyclization of marine macrolides. Org Chem Front 2021. [DOI: 10.1039/d1qo01038g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The planar structure and absolute configuration of a sailboat-shaped marine macrolide, featuring twelve carbon stereocenters and a cis-fused ether ring juncture, were unambiguously established by a combined approach of chemistry and spectroscopy.
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Affiliation(s)
- Jun Wu
- School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, PR China
| | - Zhong-Ping Jiang
- School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, PR China
| | - Ren-Jie Yan
- School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, PR China
| | - Shi-Hao Sun
- School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, PR China
| | - Yi Yu
- Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, PR China
| | - Li Shen
- Marine Drugs Research Center, College of Pharmacy, Jinan University, 601 Huangpu Avenue West, Guangzhou 510632, PR China
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17
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Zou CX, Dong SH, Hou ZL, Yao GD, Lin B, Huang XX, Song SJ. Modified lanostane-type triterpenoids with neuroprotective effects from the fungus Inonotus obliquus. Bioorg Chem 2020; 105:104438. [PMID: 33171406 DOI: 10.1016/j.bioorg.2020.104438] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/23/2020] [Accepted: 10/24/2020] [Indexed: 02/07/2023]
Abstract
Six undescribed lanostane triterpenoids (1-6), together with three known compounds (7-9) were isolated from Inonotus obliquus. Compounds 3-5 are the rare natural compounds featuring a 4,5-seco-lanostane core with a 5,7,9-trien-21,24-cyclopentane moiety. The structure elucidation of the compounds was conducted by spectroscopic techniques and the ECD method. The absolute configuration of compound 1 was confirmed by single-crystal X-ray diffraction analysis. All isolated compounds were assayed for their neuroprotective activity against H2O2-induced cell injury using human neuroblastoma SH-SY5Y cells. Compound 9 exhibited the most potent neuroprotective activity and the flow cytometry analysis indicated that 9 could protect SH-SY5Y cells from oxidative damage by inhibiting cell apoptosis.
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Affiliation(s)
- Chun-Xin Zou
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Shu-Hui Dong
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Zi-Lin Hou
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Guo-Dong Yao
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Bin Lin
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, People's Republic of China
| | - Xiao-Xiao Huang
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
| | - Shao-Jiang Song
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
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18
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Kwon Y, Shin J, Nam K, An JS, Yang S, Hong S, Bae M, Moon K, Cho Y, Woo J, Park K, Kim K, Shin J, Kim B, Kim Y, Oh D. Rhizolutin, a Novel 7/10/6‐Tricyclic Dilactone, Dissociates Misfolded Protein Aggregates and Reduces Apoptosis/Inflammation Associated with Alzheimer's Disease. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009294] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Yun Kwon
- Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Jisu Shin
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences Yonsei University 85 Songdogwahak-ro, Yeonsu-gu Incheon 21983 Republic of Korea
| | - Kwangho Nam
- Department of Chemistry and Biochemistry University of Texas at Arlington Arlington TX 76019 USA
| | - Joon Soo An
- Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Seung‐Hoon Yang
- Department of Medical Biotechnology Dongguk University 32 Dongguk-ro, Ilsandong-gu, Goyang Gyeonggi-do 10326 Republic of Korea
| | - Seong‐Heon Hong
- Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Munhyung Bae
- Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Kyuho Moon
- Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Yakdol Cho
- Research Animal Resource Center Korea Institute of Science and Technology (KIST) 5 Hwarang-ro 14-gil, Seongbuk-gu Seoul 02792 Republic of Korea
| | - Jiwan Woo
- Research Animal Resource Center Korea Institute of Science and Technology (KIST) 5 Hwarang-ro 14-gil, Seongbuk-gu Seoul 02792 Republic of Korea
| | - Keunwan Park
- Natural Product Informatics Research Center Korea Institute of Science and Technology (KIST) 679 Saimdang-ro, Gangneung-si Gangwon-do 25451 Republic of Korea
| | - Kyeonghwan Kim
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences Yonsei University 85 Songdogwahak-ro, Yeonsu-gu Incheon 21983 Republic of Korea
| | - Jongheon Shin
- Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
| | - Byung‐Yong Kim
- Microbiome Research Centre ChunLab, Inc. 2477, JW Tower 6F, Nambusunhwan-ro Seocho-gu Seoul 06725 Republic of Korea
| | - YoungSoo Kim
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences Yonsei University 85 Songdogwahak-ro, Yeonsu-gu Incheon 21983 Republic of Korea
| | - Dong‐Chan Oh
- Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
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19
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Kwon Y, Shin J, Nam K, An JS, Yang SH, Hong SH, Bae M, Moon K, Cho Y, Woo J, Park K, Kim K, Shin J, Kim BY, Kim Y, Oh DC. Rhizolutin, a Novel 7/10/6-Tricyclic Dilactone, Dissociates Misfolded Protein Aggregates and Reduces Apoptosis/Inflammation Associated with Alzheimer's Disease. Angew Chem Int Ed Engl 2020; 59:22994-22998. [PMID: 32844539 DOI: 10.1002/anie.202009294] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/20/2020] [Indexed: 01/18/2023]
Abstract
Rhizolutin (1) was discovered as a natural product of ginseng-rhizospheric Streptomyces sp. WON17. Its structure features an unprecedented 7/10/6-tricyclic dilactone carbon skeleton composed of dimethylcyclodecatriene flanked by a 7-membered and a 6-membered lactone ring based on spectroscopic analysis. During an unbiased screening of natural product libraries, this novel compound was found to dissociate amyloid-β (Aβ) plaques and tau tangles, which are key pathological hallmarks of Alzheimer's disease (AD). Rhizolutin treatment of APP/PS1 double transgenic mice with AD significantly dissociated hippocampal plaques. In vitro, rhizolutin substantially decreased Aβ-induced apoptosis and inflammation in neuronal and glial cells. Our findings introduce a unique chemical entity that targets Aβ and tau concurrently by mimicking misfolded protein clearance mechanisms of immunotherapy, which is prominently investigated in clinical trials.
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Affiliation(s)
- Yun Kwon
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Jisu Shin
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea
| | - Kwangho Nam
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX, 76019, USA
| | - Joon Soo An
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Seung-Hoon Yang
- Department of Medical Biotechnology, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do, 10326, Republic of Korea
| | - Seong-Heon Hong
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Munhyung Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Kyuho Moon
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Yakdol Cho
- Research Animal Resource Center, Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Jiwan Woo
- Research Animal Resource Center, Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Keunwan Park
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST), 679 Saimdang-ro, Gangneung-si, Gangwon-do, 25451, Republic of Korea
| | - Kyeonghwan Kim
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Byung-Yong Kim
- Microbiome Research Centre, ChunLab, Inc., 2477, JW Tower 6F, Nambusunhwan-ro, Seocho-gu, Seoul, 06725, Republic of Korea
| | - YoungSoo Kim
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
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20
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Moon K, Cui J, Kim E, Riandi ES, Park SH, Byun WS, Kal Y, Park JY, Hwang S, Shin D, Sun J, Oh KB, Cha S, Shin J, Lee SK, Yoon YJ, Oh DC. Structures and Biosynthetic Pathway of Pulvomycins B–D: 22-Membered Macrolides from an Estuarine Streptomyces sp. Org Lett 2020; 22:5358-5362. [DOI: 10.1021/acs.orglett.0c01249] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kyuho Moon
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Jinsheng Cui
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eunji Kim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Evan Setiawan Riandi
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - So Hyun Park
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Woong Sub Byun
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Youngju Kal
- Department of Chemistry, Dongguk University, Seoul 04620, Republic of Korea
| | - Jun Young Park
- Department of Chemistry, Dongguk University, Seoul 04620, Republic of Korea
| | - Sunghoon Hwang
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Daniel Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeongyoon Sun
- Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture & Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Sangwon Cha
- Department of Chemistry, Dongguk University, Seoul 04620, Republic of Korea
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Yeo Joon Yoon
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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21
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Li W, Yan R, Yu Y, Shi Z, Mándi A, Shen L, Kurtán T, Wu J. Determination of the Absolute Configuration of Super‐Carbon‐Chain Compounds by a Combined Chemical, Spectroscopic, and Computational Approach: Gibbosols A and B. Angew Chem Int Ed Engl 2020; 59:13028-13036. [PMID: 32343023 DOI: 10.1002/anie.202004358] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/15/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Wan‐Shan Li
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Ren‐Jie Yan
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Yi Yu
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Zhi Shi
- College of Life Science and Technology Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Attila Mándi
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Li Shen
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Tibor Kurtán
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Jun Wu
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
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22
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Li W, Yan R, Yu Y, Shi Z, Mándi A, Shen L, Kurtán T, Wu J. Determination of the Absolute Configuration of Super‐Carbon‐Chain Compounds by a Combined Chemical, Spectroscopic, and Computational Approach: Gibbosols A and B. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Wan‐Shan Li
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Ren‐Jie Yan
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
| | - Yi Yu
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Zhi Shi
- College of Life Science and Technology Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Attila Mándi
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Li Shen
- Marine Drugs Research Center College of Pharmacy Jinan University 601 Huangpu Avenue West Guangzhou 510632 China
| | - Tibor Kurtán
- Department of Organic Chemistry University of Debrecen PO Box 400 4002 Debrecen Hungary
| | - Jun Wu
- School of Pharmaceutical Sciences Southern Medical University 1838 Guangzhou Avenue North Guangzhou 510515 China
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23
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Ariefta NR, Azim M, Aboshi T, Koseki T, Taniguchi Y, Fujita M, Shiono Y. Colletofurans A–E, 1-Octyl-1,3-dihydroisobenzofuran Derivatives from Colletotrichum boninense AM-12-2. Org Lett 2020; 22:3161-3165. [DOI: 10.1021/acs.orglett.0c00925] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nanang R. Ariefta
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Muhlisun Azim
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Takako Aboshi
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Yoshimasa Taniguchi
- Central Laboratories for Key Technologies, Kirin Holdings Co. Ltd., Fukuura Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Makoto Fujita
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
- Division of Advanced Molecular Science, Institute for Molecular Science, National Institutes of Natural Sciences, Higashiyama, Myodaiji, Okazaki 444-8787, Japan
| | - Yoshihito Shiono
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
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24
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Li J, Chen M, Hao X, Li S, Li F, Yu L, Xiao C, Gan M. Structural Revision and Absolute Configuration of Burnettramic Acid A. Org Lett 2019; 22:98-101. [DOI: 10.1021/acs.orglett.9b04008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiao Li
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
| | - Minghua Chen
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
| | - Xiaomeng Hao
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
| | - Shasha Li
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
| | - Fang Li
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
| | - Liyan Yu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
| | - Chunling Xiao
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
| | - Maoluo Gan
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
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25
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Lee SR, Lee D, Eom HJ, Rischer M, Ko YJ, Kang KS, Kim CS, Beemelmanns C, Kim KH. Hybrid Polyketides from a Hydractinia-Associated Cladosporium sphaerospermum SW67 and Their Putative Biosynthetic Origin. Mar Drugs 2019; 17:md17110606. [PMID: 31653089 PMCID: PMC6891565 DOI: 10.3390/md17110606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/16/2019] [Accepted: 10/20/2019] [Indexed: 01/20/2023] Open
Abstract
Five hybrid polyketides (1a, 1b, and 2–4) containing tetramic acid core including a new hybrid polyketide, cladosin L (1), were isolated from the marine fungus Cladosporium sphaerospermum SW67, which was isolated from the marine hydroid polyp of Hydractinia echinata. The hybrid polyketides were isolated as a pair of interconverting geometric isomers. The structure of 1 was determined based on 1D and 2D NMR spectroscopic and HR-ESIMS analyses. Its absolute configuration was established by quantum chemical electronic circular dichroism (ECD) calculations and modified Mosher’s method. Tetramic acid-containing compounds are reported to be derived from a hybrid PKS-NRPS, which was also proved by analyzing our 13C-labeling data. We investigated whether compounds 1–4 could prevent cell damage induced by cisplatin, a platinum-based anticancer drug, in LLC-PK1 cells. Co-treatment with 2 and 3 ameliorated the damage of LLC-PK1 cells induced by 25 μM of cisplatin. In particular, the effect of compound 2 at 100 μM (cell viability, 90.68 ± 0.81%) was similar to the recovered cell viability of 88.23 ± 0.25% with 500 μM N-acetylcysteine (NAC), a positive control.
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Affiliation(s)
- Seoung Rak Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Dahae Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Hee Jeong Eom
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
| | - Maja Rischer
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans-Knöll-Institute (HKI), 07745 Jena, Germany.
| | - Yoon-Joo Ko
- Laboratory of Nuclear Magnetic Resonance, National Center for Inter-University Research Facilities (NCIRF), Seoul National University, Gwanak-gu, Seoul 08826, Korea.
| | - Ki Sung Kang
- College of Korean Medicine, Gachon University, Seongnam 13120, Korea.
| | - Chung Sub Kim
- Department of Chemistry, Yale University, New Haven, CT 06520, USA.
- Chemical Biology Institute, Yale University, West Haven, CT 06516, USA.
| | - Christine Beemelmanns
- Leibniz Institute for Natural Product Research and Infection Biology e.V., Hans-Knöll-Institute (HKI), 07745 Jena, Germany.
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
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26
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Kai K. Bioorganic chemistry of signaling molecules in microbial communication. JOURNAL OF PESTICIDE SCIENCE 2019; 44:200-207. [PMID: 31530977 PMCID: PMC6718359 DOI: 10.1584/jpestics.j19-02] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/02/2019] [Indexed: 06/01/2023]
Abstract
Microorganisms produce and secrete a variety of secondary metabolites including fatty acids, polyketides, terpenoids, alkaloids, and peptides. Among them, many molecules act as chemical signals that play important roles in inter-/intra-species microbial communication or the interaction with host organisms. In this review, I focus on our recent reports of the microbial signaling molecules involved in bacterium-fungus, bacterium-plant, and fungus-plant interactions. Their potential contribution to pest management is also discussed.
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Affiliation(s)
- Kenji Kai
- Graduate School of Life and Environmental Sciences, Osaka Prefectural University, 1–1 Gakuen-cho, Naka-ku, Sakai, Osaka 599–8531, Japan
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27
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Bokam R, Annam SCHVAR, Yalavarthi NR, Gundoju N, Ponnapalli MG. Bioinspired First Stereoselective Total Synthesis of Spinosulfate B. ChemistrySelect 2019. [DOI: 10.1002/slct.201900396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ramesh Bokam
- Centre for Natural Products & Traditional KnowledgeCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| | - S. CH. V. Appa Rao Annam
- Centre for Natural Products & Traditional KnowledgeCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| | - Nageswara Rao Yalavarthi
- Centre for Natural Products & Traditional KnowledgeCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| | - Narayanarao Gundoju
- Centre for Natural Products & Traditional KnowledgeCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
| | - Mangala Gowri Ponnapalli
- Centre for Natural Products & Traditional KnowledgeCSIR-Indian Institute of Chemical Technology Hyderabad- 500007 India
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28
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Yang S, Bian G, Sa R, Song L. Assigning the Absolute Configurations of Chiral Primary Amines Based on Experimental and DFT-Calculated 19F Nuclear Magnetic Resonance. Front Chem 2019; 7:318. [PMID: 31165055 PMCID: PMC6536038 DOI: 10.3389/fchem.2019.00318] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 04/23/2019] [Indexed: 12/26/2022] Open
Abstract
In this work, a novel method for assigning the absolute configuration of a chiral primary amine has been developed based on the experimental and DFT-calculated 19F NMR chemical shift differences of its derived two fluorinated amides by reacting with two enantiomers of a chiral derivatizing agent FPP (α-fluorinated phenylacetic phenylselenoester) separately. Comparing the experimental chemical shift difference Δ δ α - F R , S of (R)-FPA-amide/(S)-FPA-amide with the calculated Δδα-F R,S of (R)-FPA-(R)-amide/(S)-FPA-(R)-amide, if the experimental Δδα-F R,S has the same symbol (positive or negative) as one of the theoretical Δδα-F R,S , the assigned configuration of the amine is considered to be consistent with the theoretical one. Our method could be applied to a broad substrate scope avoiding wrong conclusion due to empirical judgment.
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Affiliation(s)
- Shiwei Yang
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Guangling Bian
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Rongjian Sa
- Institute of Oceanography, Ocean College, Fujian Provincial Key Laboratory of Information Processing and Intelligent Control, Minjiang University, Fuzhou, China
| | - Ling Song
- The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
- University of Chinese Academy of Sciences, Beijing, China
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29
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Dalestones A and B, two anti-inflammatory cyclopentenones from Daldinia eschscholzii with an edited strong promoter for the global regulator LaeA-like gene. Chin J Nat Med 2019; 17:387-393. [PMID: 31171274 DOI: 10.1016/s1875-5364(19)30045-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 11/22/2022]
Abstract
Replacement of the native promoter of theglobal regulator LaeA-like gene of Daldinia eschscholzii by a strong gpdA promoter led to the generation of two novel cyclopentenone metabolites, named dalestones A and B, whose structures were assigned by a combination of spectroscopic analysis, modified Mosher's reaction, and electronic circular dichroism (ECD). Dalestones A and B inhibit the gene expression of TNF-α and IL-6 in LPS-induced RAW264.7 macrophages.
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Gundoju NR, Bokam R, Yalavarthi NR, Shaik K, Ponnapalli MG. Asymmetric Total Synthesis of 16-Methyleicos-(4E
)-en-1-yn-3-ol from the Marine Sponge Cribrochalina vasculum
: Establishment of Absolute Configuration of Chiral Centers. ChemistrySelect 2019. [DOI: 10.1002/slct.201803646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Narayana Rao Gundoju
- Centre for Natural Products and Traditional Knowledge; Indian Institute of Chemical Technology, Hyderabad; India
| | - Ramesh Bokam
- Centre for Natural Products and Traditional Knowledge; Indian Institute of Chemical Technology, Hyderabad; India
| | - Nageswara Rao Yalavarthi
- Centre for Natural Products and Traditional Knowledge; Indian Institute of Chemical Technology, Hyderabad; India
| | - Karimulla Shaik
- Centre for Natural Products and Traditional Knowledge; Indian Institute of Chemical Technology, Hyderabad; India
| | - Mangala Gowri Ponnapalli
- Centre for Natural Products and Traditional Knowledge; Indian Institute of Chemical Technology, Hyderabad; India
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31
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Gangadhar P, Ramakrishna S, Venkateswarlu P, Srihari P. Stereoselective total synthesis and structural revision of the diacetylenic diol natural products strongylodiols H and I. Beilstein J Org Chem 2018; 14:2313-2320. [PMID: 30254695 PMCID: PMC6142741 DOI: 10.3762/bjoc.14.206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 08/22/2018] [Indexed: 02/05/2023] Open
Abstract
The stereoselective total synthesis of strongylodiol H and I has been accomplished. The synthetic procedure comprised the stereoselective reduction of a ketone functionality in an ene-yne-one employing CBS as a catalyst and a Cadiot-Chodkiewicz coupling reaction as the key reaction steps. A common aldehyde intermediate has been used for the synthesis of both strongylodiols.
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Affiliation(s)
- Pamarthi Gangadhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
| | - Sayini Ramakrishna
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
| | | | - Pabbaraja Srihari
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
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Kai K, Sogame M, Sakurai F, Nasu N, Fujita M. Collimonins A–D, Unstable Polyynes with Antifungal or Pigmentation Activities from the Fungus-Feeding Bacterium Collimonas fungivorans Ter331. Org Lett 2018; 20:3536-3540. [DOI: 10.1021/acs.orglett.8b01311] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kenji Kai
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Mai Sogame
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Fumie Sakurai
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Norihiro Nasu
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Makoto Fujita
- Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Pinedo-Rivilla C, Collado IG, Aleu J. Metabolism of Antifungal Thiochroman-4-ones by Trichoderma viride and Botrytis cinerea. JOURNAL OF NATURAL PRODUCTS 2018; 81:1036-1040. [PMID: 29608070 DOI: 10.1021/acs.jnatprod.7b00298] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Biotransformation of 6-methylthiochroman-4-one (1) and 6-chlorothiochroman-4-one (2) was performed using Trichoderma viride in order to obtain new derivatives with antifungal properties against the phytopathogen Botrytis cinerea. Two thiochromanone derivatives are described for the first time. Antifungal activity of these compounds was tested against two different strains of Botrytis cinerea; 1 and 2 gave 100% inhibition of Bc2100 at 100-250 μg/mL, and 3 gave a maximal inhibition of 96% of BcUCA992 at 200 μg/mL. The detoxification mechanism of 1 and 2 by B. cinerea was also investigated.
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Affiliation(s)
- Cristina Pinedo-Rivilla
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Cádiz , Campus Río S. Pedro, 11510 Puerto Real, Cádiz, Spain
| | - Isidro G Collado
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Cádiz , Campus Río S. Pedro, 11510 Puerto Real, Cádiz, Spain
| | - Josefina Aleu
- Departamento de Química Orgánica, Facultad de Ciencias , Universidad de Cádiz , Campus Río S. Pedro, 11510 Puerto Real, Cádiz, Spain
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34
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Bae M, Oh J, Bae ES, Oh J, Hur J, Suh YG, Lee SK, Shin J, Oh DC. WS9326H, an Antiangiogenic Pyrazolone-Bearing Peptide from an Intertidal Mudflat Actinomycete. Org Lett 2018; 20:1999-2002. [DOI: 10.1021/acs.orglett.8b00546] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Munhyung Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Jedo Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eun Seo Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Joonseok Oh
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
- Chemical Biology Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Joonseong Hur
- College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Young-Ger Suh
- College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
- College of Pharmacy, CHA University, Gyeonggi-do 11160, Republic of Korea
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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Fu S, Nie Q, Ma Y, Song P, Ren X, Luo C, Shang L, Yin Z. Target-guided screening of fragments (TGSOF) in the discovery of inhibitors against EV-A71 3C protease. Chem Commun (Camb) 2018; 54:2890-2893. [PMID: 29497732 DOI: 10.1039/c8cc00469b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
Target-guided screening of fragments (TGSOF) was developed and employed in the identification of EV-A71 3C protease (3Cpro) inhibitors. We identified 4-acetylpyridine and 3-acetylpyridine as effective P3 fragments of an inhibitor and obtained the corresponding irreversible inhibitors 12c and 12fvia this method. Furthermore, based on 12c and 12f, we have obtained reversible inhibitors 17c and 17f. These results demonstrated that TGSOF is a useful strategy for identifying suitable fragments in developing leads in drug discovery.
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Affiliation(s)
- Shengjun Fu
- College of Pharmacy, State Key Laboratory of Medicinal Chemical Biology and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, China.
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Hwang BS, Yoon EY, Jeong EJ, Park J, Kim EH, Rho JR. Determination of the Absolute Configuration of Polyhydroxy Compound Ostreol B Isolated from the Dinoflagellate Ostreopsis cf. ovata. J Org Chem 2017; 83:194-202. [PMID: 29185743 DOI: 10.1021/acs.joc.7b02569] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Following isolation of the polyhydroxy compound, ostreol B, from cultivated cells of the toxic dinoflagellate Ostreopsis cf. ovata collected in South Korea, 1D and 2D NMR spectroscopy were employed to determine the planar chemical structure of this compound, which contained a tetrahydropyran ring, two terminal double bonds, and 21 hydroxyl groups. The absolute configurations of all stereogenic carbon centers in ostreol B were then determined through a combination of the J-based configuration analysis, rotating frame Overhauser effect correlations, and the modified Mosher method following cleavage of the 1,2-diol bonds. Ostreol B was also found to exhibit moderate cytotoxicity in HepG2, Neuro-2a and HCT-116 cells.
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Affiliation(s)
- Buyng Su Hwang
- Department of Marine Biotechnology, Kunsan National University , 558 Daehak-ro, Gunsan 54150, South Korea
| | - Eun Young Yoon
- Environment and Resource Convergence Center, Advanced Institutes of Convergence Technology , Suwon 16229, Republic of Korea
| | - Eun Ju Jeong
- Department of Agronomy & Medicinal Plant Resources, Gyeongnam National University of Science and Technology , JinJu 52725, South Korea
| | - Jaeyeon Park
- Environment and Resource Convergence Center, Advanced Institutes of Convergence Technology , Suwon 16229, Republic of Korea
| | - Eun-Hee Kim
- Division of Magnetic Resonance, Korea Basic Science Institute , Ochang, Chungbuk 28119, Korea
| | - Jung-Rae Rho
- Department of Marine Biotechnology, Kunsan National University , 558 Daehak-ro, Gunsan 54150, South Korea
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Acyclic Triterpenoids from Alpinia katsumadai Inhibit IL-6-Induced STAT3 Activation. Molecules 2017; 22:molecules22101611. [PMID: 28946703 PMCID: PMC6151764 DOI: 10.3390/molecules22101611] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 09/21/2017] [Indexed: 01/31/2023] Open
Abstract
The seeds of Alpinia katsumadai yielded two new acyclic triterpenoids, 2,3,6,22,23-pentahydroxy-2,6,11,15,19,23-hexamethyl-tetracosa-7,10,14,18-tetraene (3) and 2,3,6,22,23-pentahydroxy-2,10,15,19,23-hexamethyl-7-methylenetetracosa-10,14,18-triene (4), as well as two known compounds, 2,3,22,23-tertrahydroxy-2,6,10,15,19,23-hexamethyl-tetracosa-6,10,14,18-tetraene (1) and 2,3,5,22,23-pentahydroxy-2,6,10,15,19,23-hexamethyl-tetracosa-6,10,14,18-tetraene (2). The absolute configurations of 2 and 3, which were determined by means of a modified Mosher’s method, are suggested as (3R; 5S; 22R) and (3R; 22R), respectively. Compounds 1–4 inhibited IL-6-induced JAK2/STAT3 activity in a dose-dependent fashion, with IC50 values of 0.67, 0.71, 2.18, and 2.99 μM. Moreover, IL-6-stimulated phosphorylation of STAT3 was significantly suppressed in U266 cells by the administration of A. katsumadai EtOH extract and Compounds 1 and 2. These results suggest that major phytochemicals, Compounds 1 and 2, obtained from A. katsumadai may be useful candidates for designing new IL-6 inhibitors as anti-inflammatory agents.
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Strepchazolins A and B: Two New Alkaloids from a Marine Streptomyces chartreusis NA02069. Mar Drugs 2017; 15:md15080244. [PMID: 28767052 PMCID: PMC5577599 DOI: 10.3390/md15080244] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 07/11/2017] [Accepted: 07/27/2017] [Indexed: 12/17/2022] Open
Abstract
Two new alkaloids, strepchazolins A (1) and B (2), together with a previously reported compound, streptazolin (3), were isolated from a marine actinomycete, Streptomyces chartreusis NA02069, collected in the Coast of Hainan Island, China. The structures of new compounds were determined by extensive NMR, mass spectroscopic and X-ray crystallographic analysis, as well as modified Mosher’s method. Compound 1 showed weak anti-Bacillus subtilis activity with the MIC value of 64.0 μM, and weak inhibitory activity against acetylcholinesterase (AChE) in vitro with IC50 value of 50.6 μM, while its diastereoisomer, Compound 2, is almost inactive.
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Luciano P, Imperatore C, Senese M, Aiello A, Casertano M, Guo YW, Menna M. Assignment of the Absolute Configuration of Phosphoeleganin via Synthesis of Model Compounds. JOURNAL OF NATURAL PRODUCTS 2017; 80:2118-2123. [PMID: 28699746 DOI: 10.1021/acs.jnatprod.7b00397] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The full absolute configuration assignment of phosphoeleganin (1), a recently discovered marine-derived phosphorylated polyketide with protein tyrosine phosphatase 1B inhibitory activity, was achieved. It was based on the synthesis of model diasteroisomeric compounds of the C-8-C-12 segment portion of phosphoeleganin, chiral derivatization methods, and application of the universal NMR database concept.
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Affiliation(s)
- Paolo Luciano
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II" , Via D. Montesano, 49, I-80131 Napoli, Italy
| | - Concetta Imperatore
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II" , Via D. Montesano, 49, I-80131 Napoli, Italy
| | - Maria Senese
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II" , Via D. Montesano, 49, I-80131 Napoli, Italy
| | - Anna Aiello
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II" , Via D. Montesano, 49, I-80131 Napoli, Italy
| | - Marcello Casertano
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II" , Via D. Montesano, 49, I-80131 Napoli, Italy
| | - Yue-W Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences , Zu Chong Zhi Road 555, Shanghai 201203, People's Republic of China
| | - Marialuisa Menna
- Dipartimento di Farmacia, Università degli Studi di Napoli "Federico II" , Via D. Montesano, 49, I-80131 Napoli, Italy
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Kim J, Shin D, Kim SH, Park W, Shin Y, Kim WK, Lee SK, Oh KB, Shin J, Oh DC. Borrelidins C-E: New Antibacterial Macrolides from a Saltern-Derived Halophilic Nocardiopsis sp. Mar Drugs 2017; 15:md15060166. [PMID: 28587270 PMCID: PMC5484116 DOI: 10.3390/md15060166] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 05/25/2017] [Accepted: 06/02/2017] [Indexed: 11/20/2022] Open
Abstract
Chemical investigation of a halophilic actinomycete strain belonging to the genus Nocardiopsis inhabiting a hypersaline saltern led to the discovery of new 18-membered macrolides with nitrile functionality, borrelidins C–E (1–3), along with a previously reported borrelidin (4). The planar structures of borrelidins C–E, which are new members of the rare borrelidin class of antibiotics, were elucidated by NMR, mass, IR, and UV spectroscopic analyses. The configurations of borrelidines C–E were determined by the interpretation of ROESY NMR spectra, J-based configuration analysis, a modified Mosher’s method, and CD spectroscopic analysis. Borrelidins C and D displayed inhibitory activity, particularly against the Gram-negative pathogen Salmonella enterica, and moderate cytotoxicity against the SNU638 and K562 carcinoma cell lines.
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Affiliation(s)
- Jungwoo Kim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Daniel Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Seong-Hwan Kim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Wanki Park
- artment of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Yoonho Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Won Kyung Kim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Ki-Bong Oh
- artment of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
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Yang AR, Lee S, Yoo YD, Kim HS, Jeong EJ, Rho JR. Limaol: A Polyketide from the Benthic Marine Dinoflagellate Prorocentrum lima. JOURNAL OF NATURAL PRODUCTS 2017; 80:1688-1692. [PMID: 28383915 DOI: 10.1021/acs.jnatprod.7b00127] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Limaol (1), along with a dinophysistoxin 1 derivative and an okadaic acid (OA) derivative, was isolated from the large-scale cultivation of the benthic marine dinoflagellate Prorocentrum lima. The structure of 1 was determined by a combination of NMR spectroscopy and mass spectrometry and contained tetrahydropyran, 1,3,5,7-tetra(methylene)heptane, and octahydrospiro[pyran-2,2'-pyrano[3,2-b]pyran] moieties. The absolute configuration of 1 was completely elucidated on the basis of ROESY correlations, J-based configuration analysis, and modified Mosher's ester analysis. Limaol showed moderate cytotoxicity when compared to OA against three cancer cell lines.
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Affiliation(s)
- A Reum Yang
- Department of Marine Biotechnology, Kunsan National University , 558 Daehak-ro, Gunsan 54150, South Korea
| | - Sangbum Lee
- Department of Marine Biotechnology, Kunsan National University , 558 Daehak-ro, Gunsan 54150, South Korea
| | - Young Du Yoo
- Department of Marine Biotechnology, Kunsan National University , 558 Daehak-ro, Gunsan 54150, South Korea
| | - Hyung Seop Kim
- Department of Marine Biotechnology, Kunsan National University , 558 Daehak-ro, Gunsan 54150, South Korea
| | - Eun Ju Jeong
- Department of Agronomy & Medicinal Plant Resources, Gyeongnam National University of Science and Technology , JinJu 660-758, South Korea
| | - Jung-Rae Rho
- Department of Marine Biotechnology, Kunsan National University , 558 Daehak-ro, Gunsan 54150, South Korea
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Maity S, Kanikarapu S, Marumudi K, Kunwar AC, Yadav JS, Mohapatra DK. Asymmetric Total Synthesis of the Putative Structure of Diplopyrone. J Org Chem 2017; 82:4561-4568. [DOI: 10.1021/acs.joc.7b00086] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saurabh Maity
- Academy of Scientific and Innovative Research (AcSIR), Mathura Road, New Delhi 110 025, India
| | | | | | | | - Jhillu S. Yadav
- Academy of Scientific and Innovative Research (AcSIR), Mathura Road, New Delhi 110 025, India
| | - Debendra K. Mohapatra
- Academy of Scientific and Innovative Research (AcSIR), Mathura Road, New Delhi 110 025, India
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Characterization of a New Trioxilin and a Sulfoquinovosyl Diacylglycerol with Anti-Inflammatory Properties from the Dinoflagellate Oxyrrhis marina. Mar Drugs 2017; 15:md15030057. [PMID: 28264430 PMCID: PMC5367014 DOI: 10.3390/md15030057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 02/04/2017] [Accepted: 02/13/2017] [Indexed: 11/17/2022] Open
Abstract
Two new compounds—a trioxilin and a sulfoquinovosyl diacylglycerol (SQDG)—were isolated from the methanolic extract of the heterotrophic dinoflagellate Oxyrrhis marina cultivated by feeding on dried yeasts. The trioxilin was identified as (4Z,8E,13Z,16Z,19Z) -7(S),10(S),11(S)-trihydroxydocosapentaenoic acid (1), and the SQDG was identified as (2S)-1-O-hexadecanosy-2-O-docosahexaenoyl-3-O-(6-sulfo-α-d-quinovopyranosyl)-glycerol (2) by a combination of nuclear magnetic resonance (NMR) spectra, mass analyses, and chemical reactions. The two compounds were associated with docosahexaenoic acid, which is a major component of O. marina. The two isolated compounds showed significant nitric oxide inhibitory activity on lipopolysaccharide-induced RAW264.7 cells. Compound 2 showed no cytotoxicity against hepatocarcinoma (HepG2), neuroblastoma (Neuro-2a), and colon cancer (HCT-116) cells, while weak cytotoxicity was observed for compound 1 against Neuro-2a cells.
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Mondol MAM, Farthouse J, Islam MT, Schüffler A, Laatsch H. Metabolites from the Endophytic Fungus Curvularia sp. M12 Act as Motility Inhibitors against Phytophthora capsici Zoospores. JOURNAL OF NATURAL PRODUCTS 2017; 80:347-355. [PMID: 28195475 DOI: 10.1021/acs.jnatprod.6b00785] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The endophytic fungus Curvularia sp., strain M12, was isolated from a leaf of the medicinal plant Murraya koenigii and cultured on rice medium followed by chemical screening of the culture extract. Chromatographic analysis led to the isolation of four new compounds, murranofuran A (1), murranolide A (2), murranopyrone (3a), and murranoic acid A (4a), along with six known metabolites, N-(2-hydroxy-6-methoxyphenyl)acetamide (5), curvularin (6), (S)-dehydrocurvularin (7), pyrenolide A (8), modiolide A (9), and 8-hydroxy-6-methoxy-3-methylisocoumarin (10). The structures of the known compounds were confirmed by comparing ESI HR mass spectra, 1H and 13C NMR, and optical rotation data with values reported in the literature. The planar structures of the new compounds were elucidated by extensive analysis of 1D and 2D NMR and mass data. The absolute configurations of the new compounds were established by coupling constant analysis, modified Mosher's method, and CD data. Compound 8 showed a strong motility impairing activity against Phytophthora capsici zoospores at a low concentration (100% at 0.5 μg/mL) in a short time (30 min). Compounds 2, 3a, 6, 7, 9, and 10 exhibited zoospore motility impairment activity at higher concentrations (IC50: 50-100 μg/mL).
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Affiliation(s)
- Muhammad Abdul Mojid Mondol
- Institute for Organic and Biomolecular Chemistry, Georg-August-University Göttingen , Tamannstrasse 2, D-37077 Göttingen, Germany
| | - Jannatul Farthouse
- Department of Biotechnology, Bangabandhu Sheikh Mujibur Rahman Agricultural University , Gazipur-1706, Bangladesh
| | - Mohammad Tofazzal Islam
- Department of Biotechnology, Bangabandhu Sheikh Mujibur Rahman Agricultural University , Gazipur-1706, Bangladesh
| | - Anja Schüffler
- Institute of Biotechnology and Drug Research , D-67663 Kaiserslautern, Germany
| | - Hartmut Laatsch
- Institute for Organic and Biomolecular Chemistry, Georg-August-University Göttingen , Tamannstrasse 2, D-37077 Göttingen, Germany
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Bae M, Park SH, Kwon Y, Lee SK, Shin J, Nam JW, Oh DC. QM-HiFSA-Aided Structure Determination of Succinilenes A-D, New Triene Polyols from a Marine-Derived Streptomyces sp. Mar Drugs 2017; 15:E38. [PMID: 28216577 PMCID: PMC5334618 DOI: 10.3390/md15020038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 02/02/2017] [Accepted: 02/08/2017] [Indexed: 02/01/2023] Open
Abstract
Based on profiles of secondary metabolites produced by marine bacteria obtained using LC/MS, succinilenes A-D (1-4), new triene polyols, were discovered from a culture of a Streptomyces strain SAK1, which was collected in the southern area of Jeju Island, Republic of Korea. The gross structures of 1-4 were primarily determined through analysis of NMR spectra. The double bond geometries of the succinilenes, which could not be established from conventional ¹H NMR spectra because of the highly overlapped olefinic signals, were successfully deciphered using the recently developed quantum-mechanics-driven ¹H iterative full spin analysis (QM-HiFSA). Succinilenes A-C (1-3) displayed inhibitory effects against lipopolysaccharide (LPS)-induced nitric oxide (NO) production, indicating their anti-inflammatory significance. These three compounds (1-3) commonly bear a succinic acid moiety, although succinilene D (4), which did not inhibit NO production, does not have this moiety in its structure. The absolute configurations of succinilenes A-D (1-4) were established through J-based configuration analysis, the modified Mosher's method following methanolysis, and CD spectral analysis.
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Affiliation(s)
- Munhyung Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - So Hyun Park
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Yun Kwon
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Joo-Won Nam
- College of Pharmacy, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea.
- Department of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA.
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
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Xu K, Yang PF, Yang YN, Feng ZM, Jiang JS, Zhang PC. Direct Assignment of the Threo and Erythro Configurations in Polyacetylene Glycosides by 1H NMR Spectroscopy. Org Lett 2017; 19:686-689. [DOI: 10.1021/acs.orglett.6b03855] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Kuo Xu
- State Key Laboratory of Bioactive
Substance and Function of Natural Medicines, Institute of Materia
Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Peng-Fei Yang
- State Key Laboratory of Bioactive
Substance and Function of Natural Medicines, Institute of Materia
Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ya-Nan Yang
- State Key Laboratory of Bioactive
Substance and Function of Natural Medicines, Institute of Materia
Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Zi-Ming Feng
- State Key Laboratory of Bioactive
Substance and Function of Natural Medicines, Institute of Materia
Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jian-Shuang Jiang
- State Key Laboratory of Bioactive
Substance and Function of Natural Medicines, Institute of Materia
Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Pei-Cheng Zhang
- State Key Laboratory of Bioactive
Substance and Function of Natural Medicines, Institute of Materia
Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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47
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Zhou SY, Wang GW, Zou YL, Deng LQ, Liu MX, Liao ZH, Lan XZ, Chen M. A new diphenyl ether derivative from Mirabilis himalaica. Nat Prod Res 2016; 31:1034-1041. [DOI: 10.1080/14786419.2016.1266351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Si-Yu Zhou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, P.R. China
| | - Guo-Wei Wang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, P.R. China
| | - Yan-Lin Zou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, P.R. China
| | - Li-Qing Deng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, P.R. China
| | - Ming-Xu Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, P.R. China
| | - Zhi-Hua Liao
- School of Life Sciences, Southwest University, Chongqing, P.R. China
| | - Xiao-Zhong Lan
- Agriculture and Animal Husbandry College, Tibet University, Nyingchi, P.R. China
| | - Min Chen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, P.R. China
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Antimicrobial metabolites from the plant endophytic fungus Penicillium sp. Fitoterapia 2016; 116:72-76. [PMID: 27876600 DOI: 10.1016/j.fitote.2016.11.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/09/2016] [Accepted: 11/10/2016] [Indexed: 01/09/2023]
Abstract
Five rare dichloro aromatic polyketides (1-5) were obtained from an endophytic fungus Penicillium sp., along with five known metabolites (6-10). Their structures were elucidated by extensive spectroscopic analysis, Mosher methods, as well as [Rh2(OCOCF3)4]-induced electronic circular dichroism (ECD) experiments. Compounds 2-4 and 6 structurally involved acyclic 1.3-diols, the uneasy configuration determinations of which were well carried out by double-derivation NMR methods. Compounds 1-10 were evaluated for their antibacterial and antifungal activities against five strains of human pathogenic microorganisms. Helvolic acid (7) showed potent inhibitory effects against Staphylococcus aureus and Pseudomonas aeruginosa with MIC (minimum inhibitory concentration) values of 5.8 and 4.6μg/mL, respectively.
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49
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Zhang G, Zhang N, Xu L, Wu HT, Chen D, Lin QH, Luo LZ. A new piperidine alkaloid from the leaves of Microcos paniculata L. Nat Prod Res 2016; 31:169-174. [DOI: 10.1080/14786419.2016.1224868] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Gang Zhang
- Technology and Engineering Center for Marine Biomedical Resource Utilization, Xiamen Medical College, Fujian Province University, Xiamen, P.R. China
| | - Na Zhang
- Department of Pharmacy, Xiamen Medical College, Xiamen, P.R. China
| | - Li Xu
- Technology and Engineering Center for Marine Biomedical Resource Utilization, Xiamen Medical College, Fujian Province University, Xiamen, P.R. China
| | - Hong-Tan Wu
- Department of Medical Technology, Xiamen Medical College, Xiamen, P.R. China
| | - Dan Chen
- Technology and Engineering Center for Marine Biomedical Resource Utilization, Xiamen Medical College, Fujian Province University, Xiamen, P.R. China
| | - Qi-Huang Lin
- Department of Pharmacy, Xiamen Medical College, Xiamen, P.R. China
| | - Lian-Zhong Luo
- Technology and Engineering Center for Marine Biomedical Resource Utilization, Xiamen Medical College, Fujian Province University, Xiamen, P.R. China
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50
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Affiliation(s)
- Yugendar Reddy
- Natural Products Chemistry Division; CSIR - Indian Institute of Chemical Technology; Hyderabad 500007 India
| | - Gowravaram Sabitha
- Natural Products Chemistry Division; CSIR - Indian Institute of Chemical Technology; Hyderabad 500007 India
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