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Hong Q, Guo MM, Yang J, Wei X, Liao L, Xin XJ, Zhang D, An FL. Four previously undescribed diketopiperazines from marine fungus Aspergillus puniceus FAHY0085 and their effects on liver X receptor α. PHYTOCHEMISTRY 2023; 214:113816. [PMID: 37536654 DOI: 10.1016/j.phytochem.2023.113816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 07/29/2023] [Accepted: 08/01/2023] [Indexed: 08/05/2023]
Abstract
Four previously undescribed diketopiperazine-type alkaloids including one oxepin-containing diketopiperazine-type alkaloid, oxepinamide L (1), three 4-quinazolinone alkaloids, puniceloids E-G (10-12), together with 12 known analogues, protuboxepin D (2), oxepinamides D-G, J-K and I (3-9), puniceloids B-D (13-15) and protubonine B (16), were isolated from the culture of the marine-derived fungus Aspergillus puniceus FAHY0085. The structures of the previously undescribed compounds were comprehensively elucidated by detailed interpretation of their NMR and HRESIMS data. Their absolute configurations were unambiguously determined by ROESY experiments, Marfey's method, calculated ECD experiments and single-crystal X-ray diffraction analysis. Compounds (3-4, 6-8, 14-15) were evaluated for their cytotoxic activity against HepG2, MCF-7, SW1116 and HeLa cells and compound 6 and 14 showed moderate cytotoxic activity against HeLa cells with IC50 49.61 ± 2.91 and 28.38 ± 1.57 μM, respectively. Compounds (1-8, 11-15) were screened for their transcriptional activation of liver X receptor α and compound 11 with known compounds 13-15 showed significant transcriptional activation of liver X receptor α with EC50 values in the range 2-50 μM.
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Affiliation(s)
- Qi Hong
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Miao-Miao Guo
- Key Laboratory of Cosmetic, China National Light Industry, Beijing Technology and Business University, No. 11/33, Fucheng Road, Beijing, 100048, China
| | - Jin Yang
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Xing Wei
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Li Liao
- Key Laboratory for Polar Science, Ministry of Natural Resources, Polar Research Institute of China, Shanghai, 200136, China; School of Oceanography, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiu-Juan Xin
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Di Zhang
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; Jiangsu Institute of Marine Resources Development, School of Pharmacy, Jiangsu Ocean University, Lianyungang, 222005, PR China.
| | - Fa-Liang An
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Center for Biomanufacturing, School of Biotechnology, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; Marine Biomedical Science and Technology Innovation Platform of Lin-gang Special Area, No.4, Lane 218, Haiji Sixth Road, Shanghai, 201306, China.
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Dong YL, Li XM, Wang YR, Shi XS, Wang BG, Meng LH. Oxepine-containing pyrazinopyrimidine alkaloids and quinolinone derivatives produced by Aspergillus versicolor AS-212, a deep-sea-derived endozoic fungus. Fitoterapia 2023; 168:105559. [PMID: 37271296 DOI: 10.1016/j.fitote.2023.105559] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/21/2023] [Accepted: 05/30/2023] [Indexed: 06/06/2023]
Abstract
Four new oxepine-containing pyrazinopyrimidine alkaloids, versicoxepines A - D (1-4), two quinolinone alkaloid analogs including 3-hydroxy-6-methoxy-4-phenylquinolin-2(1H)-one (5) and 3-methoxy-6-hydroxy-4-phenylquinolin-2(1H)-one (6) which were new naturally occurring compounds, together with two known compounds (7 and 8) were isolated from Aspergillus versicolor AS-212, an endozoic fungus isolated from the deep-sea coral Hemicorallium cf. imperiale, which was collected from the Magellan Seamounts in the Western Pacific Ocean. Their structures were determined by extensive analysis of the spectroscopic and X-ray crystallographic data as well as by chiral HPLC analysis, ECD calculation, and DP4+ probability prediction. Structurally, versicoxepines B and C (2 and 3) represent the first example of a new oxepine-containing pyrazinopyrimidine alkaloid whose cyclic dipeptide moiety is composed of the same type of amino acid (Val or Ile). Compound 5 displayed antibacterial activity against aquatic pathogens, Vibrio harveyi and V. alginolyticus, with MICs of 8 μg/mL.
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Affiliation(s)
- Yu-Liang Dong
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, People's Republic of China
| | - Xiao-Ming Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China
| | - Yi-Ran Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, People's Republic of China
| | - Xiao-Shan Shi
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China
| | - Bin-Gui Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, People's Republic of China; Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, People's Republic of China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China.
| | - Ling-Hong Meng
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, People's Republic of China; University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, People's Republic of China; Laboratory of Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Wenhai Road 1, Qingdao 266237, People's Republic of China.
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Mandal B, Karmakar I, Brahmachari G. An Updated Review on Biologically Promising Natural Oxepines. Chem Biodivers 2022; 19:e202200484. [PMID: 36039468 DOI: 10.1002/cbdv.202200484] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 08/29/2022] [Indexed: 11/08/2022]
Abstract
Benzo-oxepines and dibenzo-oxepines, a unique class of naturally occurring secondary metabolites, are distributed mainly in plants and fungi and have received much attention from phytochemists and biologists based on their fascinating structural features and health-promoting functions. This review summarizes 100 oxepine derivatives comprising three categories: benzo-oxepine, dibenzo-oxepine, and pyrano-oxepine. Studies on various structural features and pharmacological activities of oxepine derivatives promote further in-depth research on these potent natural products. This review portrays the natural occurrence, bioactivity and biosynthesis of oxepines reported from 1984 to 2021.
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Affiliation(s)
- Bhagirath Mandal
- Visva-Bharati University: Visva-Bharati, Chemistry, Siksha-Bhavana, Santiniketan, West Bnegal, 731235, Santiniketan, INDIA
| | - Indrajit Karmakar
- Visva-Bharati University: Visva-Bharati, Chemistry, Siksha-Bhavana, 731235, Santiniketan, INDIA
| | - Goutam Brahmachari
- Visva-Bharati University: Visva-Bharati, Chemistry, Siksha Bhavana Street, 731 235, Santiniketan, INDIA
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Nallapati S, Tseng MF, Chen PL, Chuang SC. Phosphine-Mediated [4 + 3] Annulation of Diynoates and 2-Arylidene Indane-1,3-diones: Access of Indeno[1,2- b]oxepin-4-ylidenes and Beyond. Org Lett 2022; 24:2993-2997. [PMID: 35442699 DOI: 10.1021/acs.orglett.2c00893] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel unprecedented triphenylphosphine-mediated [4 + 3] annulation reaction of 2-benzylidene indane-1,3-diones and -diynoates through initial phosphine α-addition was discovered and found to result in biologically interesting indeno[1,2-b]oxepin-4-ylidenes in up to 75% yield. The seven-membered separable Z and E isomeric oxepins were confirmed using single-crystal X-ray diffraction.
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Affiliation(s)
- Sureshbabu Nallapati
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.,Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C
| | - Min-Feng Tseng
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.,Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C
| | - Pei-Ling Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 30050 Taiwan, R.O.C
| | - Shih-Ching Chuang
- Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.,Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C
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Zheng L, Wang H, Ludwig-Radtke L, Li SM. Oxepin Formation in Fungi Implies Specific and Stereoselective Ring Expansion. Org Lett 2021; 23:2024-2028. [PMID: 33656898 DOI: 10.1021/acs.orglett.1c00166] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oxepinamides are fungal oxepine-pyrimidinone-ketopiperazine derivatives. In this study, we elucidated the biosynthetic pathway of oxepinamide D in Aspergillus ustus by gene deletion, heterologous expression, feeding experiments, and enzyme assays. We demonstrated that the cytochrome P450 enzymes catalyzed highly specific and stereoselective oxepin ring formation.
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Affiliation(s)
- Liujuan Zheng
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch Straße 4, 35037 Marburg, Germany
| | - Haowen Wang
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch Straße 4, 35037 Marburg, Germany
| | - Lena Ludwig-Radtke
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch Straße 4, 35037 Marburg, Germany
| | - Shu-Ming Li
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch Straße 4, 35037 Marburg, Germany
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Guo Y, Ghidinelli S, de la Cruz M, Mackenzie TA, Ramos MC, Sánchez P, Vicente F, Genilloud O, Larsen TO. Oxepinamides L and M, two new oxepine-pyrimidinone-ketopiperazine type nonribosomal peptides from Aspergillus californicus. Nat Prod Res 2020; 36:2043-2048. [PMID: 33161768 DOI: 10.1080/14786419.2020.1844699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A chemical investigation of Aspergillus californicus IBT 16748 led to the isolation of two new oxepine-pyrimidinone-ketopiperazine type nonribosomal peptides oxepinamides L (1) and M (2). Their structures were characterised by spectroscopic analysis including HRESIMS, 1D and 2D NMR. The absolute structure of 1 was assigned by ECD calculation. The antibacterial and cytotoxic properties of 1 were evaluated.
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Affiliation(s)
- Yaojie Guo
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Simone Ghidinelli
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | | | | | | | | | | | | | - Thomas O Larsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kgs. Lyngby, Denmark
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