1
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Okba MM, El-Shiekh RA, Abu-Elghait M, Sobeh M, Ashour RMS. HPLC-PDA-ESI-MS/MS Profiling and Anti-Biofilm Potential of Eucalyptussideroxylon Flowers. Antibiotics (Basel) 2021; 10:761. [PMID: 34201471 PMCID: PMC8300825 DOI: 10.3390/antibiotics10070761] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 01/13/2023] Open
Abstract
The development of multidrug-resistant bacterial strains is a worldwide emerging problem that needs a global solution. Exploring new natural antibiofilm agents is one of the most important alternative therapies in combating bacterial infections. This study aimed at testing the antimicrobial potential of Eucalyptus sideroxylon flowers extract (ESFE) against Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Candida albicans prior to testing the antibiofilm activity against S. aureus, P. aeruginosa and C. albicans. ESFE demonstrated antimicrobial activity and promising inhibition activity against methicillin-resistant S. aureus (MRSA) biofilm formation up to 95.9% (p < 0.05) at a concentration of 0.05 mg/mL and eradicated C. albicans biofilm formation up to 71.2% (p < 0.05) at a concentration of 0.7 mg/mL. LC-MS analysis allowed the tentative identification of eighty-three secondary metabolites: 21 phloroglucinol, 18 terpenes, 16 flavonoids, 7 oleuropeic acid derivatives, 7 ellagic acid derivatives, 6 gallic acid derivatives, 3 phenolic acids, 3 fatty acids and 2 miscellaneous. In conclusion, E. sideroxylon is a rich source of effective constituents that promote its valorization as a promising candidate in the management of multidrug-resistant bacterial infections.
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Affiliation(s)
- Mona M. Okba
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt; (M.M.O.); (R.A.E.-S.)
| | - Riham A. El-Shiekh
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt; (M.M.O.); (R.A.E.-S.)
| | - Mohammed Abu-Elghait
- Department of Botany and Microbiology, Faculty of Science, Al-azhar University, Cairo 11884, Egypt
| | - Mansour Sobeh
- AgroBioSciences Research Division, Mohammed VI Polytechnic University, Ben-Guerir 43150, Morocco;
| | - Rehab M. S. Ashour
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt; (M.M.O.); (R.A.E.-S.)
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2
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Yan XL, Jun-Sang, Zhang X, Lin Y, Long QD, Zhu QF, Liao SG. Euphorboside A, a cytotoxic meroterpenoid glycoside with an unusual humulene-phloroglucinol skeleton from Euphorbia kansuensis. Fitoterapia 2021; 153:104966. [PMID: 34144143 DOI: 10.1016/j.fitote.2021.104966] [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: 05/10/2021] [Revised: 06/11/2021] [Accepted: 06/13/2021] [Indexed: 11/24/2022]
Abstract
Euphorboside A (1), an unusual meroterpenoid glycoside featuring the incorporation of an acylphloroglucinol moiety into a humulene skeleton to form a 6/6/11 ring system, was isolated from the roots of Euphorbia kansuensis. Its structure was elucidated by extensive spectroscopic analysis, chemical methods, and ECD calculations. Compound 1 was screened for the cytotoxicity against nine cancer cell lines, and 1 showed marked inhibitory activities against human colon cancer RKO and human breast cancer MDA-MB-231 cell lines with IC50 values of 3.70 and 4.15 μM, respectively.
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Affiliation(s)
- Xue-Long Yan
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, Guizhou, China
| | - Jun-Sang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xu Zhang
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, Guizhou, China
| | - Yan Lin
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, Guizhou, China
| | - Qing-De Long
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, Guizhou, China
| | - Qin-Feng Zhu
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, Guizhou, China
| | - Shang-Gao Liao
- School of Pharmacy, Guizhou Medical University, Guian New District 550025, Guizhou, China.
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3
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Selas A, Martin-Encinas E, Fuertes M, Masdeu C, Rubiales G, Palacios F, Alonso C. A patent review of topoisomerase I inhibitors (2016-present). Expert Opin Ther Pat 2021; 31:473-508. [PMID: 33475439 DOI: 10.1080/13543776.2021.1879051] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Topoisomerases are important targets for therapeutic improvement in the treatment of some diseases, including cancer. Inhibitors and poisons of topoisomerase I can limit the activity of this enzyme in its enzymatic cycle. This fact implies an anticancer effect of these drugs, since most cancer cells are characterized by both a higher activity of topoisomerase I and a higher replication rate compared to non-cancerous cells. Clinically approved inhibitors include camptothecin (CPT) and its derivatives. However, their limitations have encouraged different research groups to prepare new compounds, proof of which are the numerous research works and patents, some of them in the last five years. AREAS COVERED This review covers patent literature on topoisomerase I inhibitors and their application published between 2016-present. EXPERT OPINION The highest contribution toward patent development has been obtained from academics or small biotechnology companies. The most important fields of innovation include the preparation of prodrugs or inhibitors combined with other agents, as biocompatible polymers or antibodies. A promising development of topoisomerase I inhibitors is expected in the next years, directed to the treatment of diverse diseases, specifically toward different types of cancer and infectious diseases, among others.
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Affiliation(s)
- Asier Selas
- Departamento De Química Orgánica I, Facultad De Farmacia. Universidad Del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz, Spain
| | - Endika Martin-Encinas
- Departamento De Química Orgánica I, Facultad De Farmacia. Universidad Del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz, Spain
| | - Maria Fuertes
- Departamento De Química Orgánica I, Facultad De Farmacia. Universidad Del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz, Spain
| | - Carme Masdeu
- Departamento De Química Orgánica I, Facultad De Farmacia. Universidad Del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz, Spain
| | - Gloria Rubiales
- Departamento De Química Orgánica I, Facultad De Farmacia. Universidad Del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Departamento De Química Orgánica I, Facultad De Farmacia. Universidad Del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz, Spain
| | - Concepción Alonso
- Departamento De Química Orgánica I, Facultad De Farmacia. Universidad Del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Vitoria-Gasteiz, Spain
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4
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Shang ZC, Han C, Xu JL, Liu RH, Yin Y, Wang XB, Yang MH, Kong LY. Twelve formyl phloroglucinol meroterpenoids from the leaves of Eucalyptus robusta. PHYTOCHEMISTRY 2019; 163:111-117. [PMID: 31039475 DOI: 10.1016/j.phytochem.2019.04.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 12/28/2018] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
Twelve formyl phloroglucinol meroterpenoids (FPMs) were isolated from the leaves of Eucalyptus robusta Smith. Their structures were elucidated via spectroscopic data analysis, the circular dichroism (CD) exciton chirality method, Rh2(OCOCF3)4-induced CD experiments, and application of the Snatzke chirality rules. Eucalrobusones Q, S, and X are the first FPMs that have been identified in which the C-7' of phloroglucinol is linked to the C-15 of cadinane, the C-4 of cubebane, and the C-8 of menthane, respectively. (+)-Eucalrobusone X exhibited the most potent antifungal ability against Candida albicans with a MIC50 value of 10.78 μg/mL, and eucalrobusone U exhibited the greatest anti-C. glabrata activity with MIC50 value of 1.53 μg/mL.
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Affiliation(s)
- Zhi-Chun Shang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Chao Han
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Jia-Li Xu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Rui-Huan Liu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Yong Yin
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Xiao-Bing Wang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Ming-Hua Yang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Ling-Yi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China.
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5
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dos Santos BM, Zibrandtsen JFS, Gunbilig D, Sørensen M, Cozzi F, Boughton BA, Heskes AM, Neilson EHJ. Quantification and Localization of Formylated Phloroglucinol Compounds (FPCs) in Eucalyptus Species. FRONTIERS IN PLANT SCIENCE 2019; 10:186. [PMID: 30863416 PMCID: PMC6399404 DOI: 10.3389/fpls.2019.00186] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 02/05/2019] [Indexed: 05/05/2023]
Abstract
The Eucalyptus genus is a hyper-diverse group of long-lived trees from the Myrtaceae family, consisting of more than 700 species. Eucalyptus are widely distributed across their native Australian landscape and are the most widely planted hardwood forest trees in the world. The ecological and economic success of Eucalyptus trees is due, in part, to their ability to produce a plethora of specialized metabolites, which moderate abiotic and biotic interactions. Formylated phloroglucinol compounds (FPCs) are an important class of specialized metabolites in the Myrtaceae family, particularly abundant in Eucalyptus. FPCs are mono- to tetra-formylated phloroglucinol based derivatives, often with an attached terpene moiety. These compounds provide chemical defense against herbivory and display various bioactivities of pharmaceutical relevance. Despite their ecological and economic importance, and continued improvements into analytical techniques, FPCs have proved challenging to study. Here we present a simple and reliable method for FPCs extraction, identification and quantification by UHPLC-DAD-ESI-Q-TOF-MS/MS. The method was applied to leaf, flower bud, and flower samples of nine different eucalypt species, using a small amount of plant material. Authentic analytical standards were used to provide high resolution mass spectra and fragmentation patterns. A robust method provides opportunities for future investigations into the identification and quantification of FPCs in complex biological samples with high confidence. Furthermore, we present for the first time the tissue-based localization of FPCs in stem, leaf, and flower bud of Eucalyptus species measured by mass spectrometry imaging, providing important information for biosynthetic pathway discovery studies and for understanding the role of those compounds in planta.
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Affiliation(s)
- Bruna Marques dos Santos
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Juliane F. S. Zibrandtsen
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Disan Gunbilig
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mette Sørensen
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Federico Cozzi
- Section for Molecular Plant Biology, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Berin A. Boughton
- School of BioSciences, University of Melbourne, Parkville, VIC, Australia
- Metabolomics Australia, School of BioSciences, University of Melbourne, Parkville, VIC, Australia
| | - Allison Maree Heskes
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- Center for Synthetic Biology ‘bioSYNergy’, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Elizabeth Heather Jakobsen Neilson
- Section for Plant Biochemistry, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- VILLUM Center for Plant Plasticity, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- Center for Synthetic Biology ‘bioSYNergy’, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- *Correspondence: Elizabeth Heather Jakobsen Neilson
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In Vitro Antibiofilm Activity of Eucarobustol E against Candida albicans. Antimicrob Agents Chemother 2017; 61:AAC.02707-16. [PMID: 28584159 DOI: 10.1128/aac.02707-16] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 05/20/2017] [Indexed: 12/23/2022] Open
Abstract
Formyl-phloroglucinol meroterpenoids (FPMs) are important types of natural products with various bioactivities. Our antifungal susceptibility assay showed that one of the Eucalyptus robusta-derived FPMs, eucarobustol E (EE), exerted a strong inhibitory effect against Candida albicans biofilms at a concentration of 16 μg/ml. EE was found to block the yeast-to-hypha transition and reduce the cellular surface hydrophobicity of the biofilm cells. RNA sequencing and real-time reverse transcription-PCR analysis showed that exposure to 16 μg/ml of EE resulted in marked reductions in the levels of expressions of genes involved in hyphal growth (EFG1, CPH1, TEC1, EED1, UME6, and HGC1) and cell surface protein genes (ALS3, HWP1, and SAP5). Interestingly, in response to EE, genes involved in ergosterol biosynthesis were downregulated, while the farnesol-encoding gene (DPP3) was upregulated, and these findings were in agreement with those from the quantification of ergosterol and farnesol. Combined with the obvious elevation of negative regulator genes (TUP1, NRG1), we speculated that EE's inhibition of carbon flow to ergosterol triggered the mechanisms of the negative regulation of hyphal growth and eventually led to biofilm inhibition.
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7
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Jian KL, Zhang C, Shang ZC, Yang L, Kong LY. Eucalrobusone C suppresses cell proliferation and induces ROS-dependent mitochondrial apoptosis via the p38 MAPK pathway in hepatocellular carcinoma cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2017; 25:71-82. [PMID: 28190473 DOI: 10.1016/j.phymed.2016.12.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 12/17/2016] [Accepted: 12/23/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Eucalyptus extracts have anti-cancer activity against various cancer cells. Formyl-phloroglucinol meroterpenoids (FPMs), which are typical secondary metabolites of the genera Eucalyptus, have many important pharmacological activities. PURPOSE Eucalrobusone C (EC), a new bioactive phytochemical, was first isolated from the leaves of Eucalyptus robusta in our laboratory. EC is a FPM, and our previous research revealed that EC showed strongest cytotoxicity in three cancer models than other compounds isolated from the leaves of E. robusta. This study investigated its anti-tumor effects on human hepatocellular carcinoma (HCC) and its underlying mechanisms. METHODS Cell viability was measured by MTT assay. Cell cycle, apoptosis and mitochondrial transmembrane potential were determined by flow cytometry. Immunofluorescence was determined by a laser scanning confocal microscope. Protein levels were analyzed by Western blotting. RESULTS Our results showed that EC exerted strong anti-proliferative activity against HCC cells in a concentration- and time-dependent manner. EC markedly induced apoptosis through the caspase-dependent mitochondrial pathway, and the cell cycle was arrested at S phase. SB203580, a p38 MAPK inhibitor, effectively decreased cell death caused by EC. Moreover, the ROS scavenger N-acetyl cysteine (NAC) significantly attenuated apoptosis induced by EC and reversed EC-induced p38 MAPK activation. CONCLUSION Our findings indicate that EC induces mitochondrial-dependent apoptosis in HCC cells through ROS generation and p38 MAPK activation, making EC a promising candidate for further development as an anticancer agent for HCC cells.
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Affiliation(s)
- Kai-Li Jian
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Chao Zhang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Zhi-Chun Shang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Lei Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China.
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China.
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8
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Shang ZC, Yang MH, Liu RH, Wang XB, Kong LY. New Formyl Phloroglucinol Meroterpenoids from the Leaves of Eucalyptus robusta. Sci Rep 2016; 6:39815. [PMID: 28004790 PMCID: PMC5177953 DOI: 10.1038/srep39815] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 11/28/2016] [Indexed: 11/09/2022] Open
Abstract
Seven new formyl phloroglucinol meroterpenoids (FPMs), namely eucalrobusones J-P (1–7), as well as three known ones (8–10) were isolated from the leaves of Eucalyptus robusta. Their structures were elucidated by spectroscopic data analysis, and their absolute configurations were determined by applications of the Snatzke’s helicity rule and the electron circular dichroism (ECD) calculation. These FPMs are diverse in coupling patterns between phloroglucinol and sesquiterpenoid units, forming novel polycyclic ring systems. Compound 1 possesses a new carbon skeleton that a 1-oxaspiro[5.6]dodecane core is formed through C-14 rather than C-4 of the aromadendrane moiety. Compound 2 features a novel 6/7/5 ring-fused 6-oxabicyclo[3.2.2]nonane skeleton. Compounds 3–5 are rare aristolane-based FPMs. By forming different oxo bridges, compound 3 is the first sample of FPM with benzo-dihydrofuran structure, and compound 4 possesses a novel 6/6/6/6/3-fused pentacyclic skeleton. Compounds 1, 6, and 8 exhibited significant antifungal activities against Candida glabrata with MIC50 values of 2.57, 1.95, and 2.49 μg/mL, respectively.
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Affiliation(s)
- Zhi-Chun Shang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Rui-Huan Liu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Xiao-Bing Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
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9
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Shang ZC, Yang MH, Jian KL, Wang XB, Kong LY. (1) H NMR-Guided Isolation of Formyl-Phloroglucinol Meroterpenoids from the Leaves of Eucalyptus robusta. Chemistry 2016; 22:11778-84. [PMID: 27412352 DOI: 10.1002/chem.201601732] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Indexed: 11/08/2022]
Abstract
Nine formyl-phloroglucinolmeroterpenoids (FPMs), namely, eucalrobusones A-I (1-9), were isolated from the leaves of Eucalyptus robusta by tracking the phenolic hydroxyl (1) H NMR peaks. The Snatzke helicity rules for the Cotton effects of twisted benzene rings were applied to elucidate the absolute configurations of the FPMs. These findings, along with NMR spectroscopy, the circular dichroism (CD) exciton chirality method, and CD calculations, allowed complete structures for the FPMs to be assigned. Eucalrobusones A-F (1-6) are novel adducts formed between a formyl-derived carbon atom on the phloroglucinol ring and monoterpene and sesquiterpene components. Eucalrobusones G-I (7-9) are the first examples of FPMs with cubebane part structures connected by an unusual 1-oxaspiro[5.5]undecane subunit. Among these isolates, eucalrobusone C (3) showed significant cytotoxicity against HepG2, MCF-7, and U2OS cancer cell lines, with IC50 values less than 10 μm. Compound 3 significantly blocks cell proliferation in MCF-7 cells and induces MCF-7 cell death through apoptosis.
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Affiliation(s)
- Zhi-Chun Shang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, P. R. China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, P. R. China.
| | - Kai-Li Jian
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, P. R. China
| | - Xiao-Bing Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, P. R. China
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, P. R. China.
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10
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Hu L, Zhang Y, Zhu H, Liu J, Li H, Li XN, Sun W, Zeng J, Xue Y, Zhang Y. Filicinic Acid Based Meroterpenoids with Anti-Epstein-Barr Virus Activities from Hypericum japonicum. Org Lett 2016; 18:2272-5. [PMID: 27116597 DOI: 10.1021/acs.orglett.6b00906] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Seven filicinic acid-based meroterpenoids (1-7), possessing 6/6/11, 6/6/7/5, or 6/6/10 ring systems, were isolated from Hypericum japonicum. All of them have novel skeletons with the incorporation of sesquiterpenoid moieties to an acylated filicinic acid. Compounds 2a and 4 exhibited significant efficacy on anti-Epstein-Barr virus, with EC50 values of 0.57 and 0.49 μM, respectively. Furthermore, compounds 2a and 4 were well accommodated to the binding pocket of 2GV9 predicted by the molecular docking.
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Affiliation(s)
- Linzhen Hu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430030, P. R. China.,Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430022, P. R. China
| | - Yu Zhang
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430022, P. R. China
| | - Hucheng Zhu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430030, P. R. China
| | - Junjun Liu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430030, P. R. China
| | - Hua Li
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430030, P. R. China
| | - Xiao-Nian Li
- Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650204, P. R. China
| | - Weiguang Sun
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430030, P. R. China
| | - Junfen Zeng
- Department of Pharmacy, Renmin Hospital of Wuhan University , Wuhan 430060, P. R. China
| | - Yongbo Xue
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430030, P. R. China
| | - Yonghui Zhang
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430030, P. R. China
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11
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Adams DH, Shou Q, Wohlmuth H, Cowin AJ. Data on keratin expression in human cells cultured with Australian native plant extracts. Data Brief 2016; 7:848-67. [PMID: 27077086 PMCID: PMC4816876 DOI: 10.1016/j.dib.2016.02.069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/12/2016] [Accepted: 02/26/2016] [Indexed: 11/26/2022] Open
Abstract
Australian native plants have a long history of therapeutic use in indigenous cultures particularly for the treatment of wounds. We analysed 14 plant derived compounds from the species Pilidiostigma glabrum, Myoporum montanum, Geijera parviflora, and Rhodomyrtus psidioides for keratin 1, 5, 10 and 14 supporting the research article "Native Australian plant extracts differentially induce Collagen I and Collagen III in vitro and could be important targets for the development of new wound healing therapies" [5]. An in situ immunofluorescence assay was used in a 96 well tissue culture plate format to measure keratin expression in immortalised human keratinocytes (HaCaTs) exposed Australian native plant compounds to NMR spectra for the plant extracts are included in this article as is quantitative fluorescent intensity data of keratin 1, 5, 10 and 14 expression.
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Affiliation(s)
- Damian H Adams
- Regenerative Medicine, Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Qingyao Shou
- Southern Cross Plant Science, Southern Cross University, Lismore, New South Wales 2480, Australia
| | - Hans Wohlmuth
- Southern Cross Plant Science, Southern Cross University, Lismore, New South Wales 2480, Australia; Integria Healthcare, Gallans Road, Ballina, New South Wales 2478, Australia
| | - Allison J Cowin
- Regenerative Medicine, Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
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Lin J, Wang R, Xu G, Ding Z, Zhu X, Liu X, Zou J, Chen G, Li L, Liu L. New cadinane sesquiterpenoids from the basidiomycetous fungus Pholiota sp. RSC Adv 2016. [DOI: 10.1039/c6ra22448b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The basidiomycetous fungus Pholiota sp. produced five new cadinane sesquiterpenoids pholiotins A–E (1–5). The absolute configurations were determined by X-ray diffraction, the Snatzke's method and electronic circular dichroism (ECD) calculations.
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Native Australian plant extracts differentially induce Collagen I and Collagen III in vitro and could be important targets for the development of new wound healing therapies. Fitoterapia 2015; 109:45-51. [PMID: 26705840 DOI: 10.1016/j.fitote.2015.12.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 12/11/2015] [Accepted: 12/15/2015] [Indexed: 11/21/2022]
Abstract
Australian native plants have a long history of therapeutic use in indigenous cultures, however, they have been poorly studied scientifically. We analysed the effects of 14 plant derived compounds from the species Pilidiostigma glabrum, Myoporum montanum, Geijera parviflora, and Rhodomyrtus psidioides for their potential wound healing properties by assessing their ability to induce or suppress Collagen I and Collagen III expression in human skin fibroblasts in culture. The compound 7-geranyloxycoumarin was able to significantly increase Collagen I (23.7%, p<0.0002) expression in comparison to control. Significant suppression of Collagen III was observed for the compounds flindersine (11.1%, p<0.02), and (N-acetoxymethyl) flindersine (27%, p<0.00005). The implications of these finding is that these compounds could potentially alter the expression of different collagens in the skin allowing for the potential development of new wound healing therapies and new approaches for treating various skin diseases as well as photo (sun) damaged, and aged skin.
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