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Zaman KAU, Hu Z, Wu X, Hou S, Saito J, Kondratyuk TP, Pezzuto JM, Cao S. NF-κB Inhibitory and Antibacterial Helvolic and Fumagillin Derivatives from Aspergillus terreus. J Nat Prod 2020; 83:730-737. [PMID: 32163285 DOI: 10.1021/acs.jnatprod.9b01190] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two new helvolic acid analogues (1 and 2) and one new fumagillin derivative containing an octahydroisobenzofuran moiety (3), together with four known compounds (4-7), were isolated from an Aspergillus terreus, isolated from soil collected from Mauna Kea, the highest mountain in Hawaii. Compound 4 was recorded in SciFinder with a CAS Registry Number of 1379525-35-5, but it was not documented in the cited reference (ACS Chem. Biol. 2012, 7, 137). The structures of compounds 1-4 were elucidated by NMR spectroscopy and HRMS and ECD analysis. Compounds 5 and 6 showed significant inhibitory activity against NF-κB with IC50 values of 2.7 ± 2.6 and 6.5 ± 0.8 μM, respectively. Compounds 1 and 2 were active against S. aureus with MICs of 6.25 and 6.25 μg/mL, respectively, while compound 5 inhibited E. coli with an MIC of 3.12 μg/mL.
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Affiliation(s)
- Kh Ahammad Uz Zaman
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - Zhenquan Hu
- Warshel Institute for Computational Biology, The Chinese University of Hong Kong, Shenzhen, People's Republic of China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Xiaohua Wu
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - Shaobin Hou
- Advanced Studies in Genomics, Proteomics and Bioinformatics (ASGPB), University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
| | - Jennifer Saito
- Advanced Studies in Genomics, Proteomics and Bioinformatics (ASGPB), University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
| | - Tamara P Kondratyuk
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - John M Pezzuto
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
- Arnold & Mary Schwartz College of Pharmacy and Health Sciences, Long Island University, 75 DeKalb Avenue, Brooklyn, New York 11201-5497, United States
| | - Shugeng Cao
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
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Belhadj S, Hentati O, Hamdaoui G, Fakhreddine K, Maillard E, Dal S, Sigrist S. Beneficial Effect of Jojoba Seed Extracts on Hyperglycemia-Induced Oxidative Stress in RINm5f Beta Cells. Nutrients 2018; 10:nu10030384. [PMID: 29558444 PMCID: PMC5872802 DOI: 10.3390/nu10030384] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/12/2018] [Accepted: 03/15/2018] [Indexed: 12/21/2022] Open
Abstract
Hyperglycemia occurs during diabetes and insulin resistance. It causes oxidative stress by increasing reactive oxygen species (ROS) levels, leading to cellular damage. Polyphenols play a central role in defense against oxidative stress. In our study, we investigated the antioxidant properties of simmondsin, a pure molecule present in jojoba seeds, and of the aqueous extract of jojoba seeds on fructose-induced oxidative stress in RINm5f beta cells. The exposure of RINm5f beta cells to fructose triggered the loss of cell viability (-48%, p < 0.001) and disruption of insulin secretion (p < 0.001) associated with of reactive oxygen species (ROS) production and a modulation of pro-oxidant and antioxidant signaling pathway. Cell pre-treatments with extracts considerably increased cell viability (+86% p < 0.001) for simmondsin and +74% (p < 0.001) for aqueous extract and insulin secretion. The extracts also markedly decreased ROS (-69% (p < 0.001) for simmondsin and -59% (p < 0.001) for aqueous extract) and caspase-3 activation and improved antioxidant defense, inhibiting p22phox and increasing nuclear factor (erythroid-derived 2)-like 2 (Nrf2) levels (+70%, p < 0.001) for aqueous extract. Simmondsin had no impact on Nrf2 levels. The richness and diversity of molecules present in jojoba seed extract makes jojoba a powerful agent to prevent the destruction of RINm5f beta cells induced by hyperglycemia.
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Affiliation(s)
- Sahla Belhadj
- UMR DIATHEC, EA 7294, Fédération de Médecine Translationnelle de Strasbourg (FMTS), University of Strasbourg, Boulevard René Leriche, 67200 Strasbourg, France.
| | - Olfa Hentati
- Institut Supérieur de Biotechnologie de Sfax (ISBS), Road of Soukra Km 4, PO Box, Sfax 1175, Tunisia.
| | - Ghaith Hamdaoui
- Laboratory of Bioactive Substances, Center of Biotechnology of Borj Cédria, BP 901, Hammam-lif 2050, Tunisia.
| | | | - Elisa Maillard
- UMR DIATHEC, EA 7294, Fédération de Médecine Translationnelle de Strasbourg (FMTS), University of Strasbourg, Boulevard René Leriche, 67200 Strasbourg, France.
| | - Stéphanie Dal
- UMR DIATHEC, EA 7294, Fédération de Médecine Translationnelle de Strasbourg (FMTS), University of Strasbourg, Boulevard René Leriche, 67200 Strasbourg, France.
| | - Séverine Sigrist
- UMR DIATHEC, EA 7294, Fédération de Médecine Translationnelle de Strasbourg (FMTS), University of Strasbourg, Boulevard René Leriche, 67200 Strasbourg, France.
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3
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Salamanca D, Dobslaw D, Engesser KH. Removal of cyclohexane gaseous emissions using a biotrickling filter system. Chemosphere 2017; 176:97-107. [PMID: 28260660 DOI: 10.1016/j.chemosphere.2017.02.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 06/06/2023]
Abstract
The removal of cyclohexane from gaseous emissions was studied using a biotrickling filter packed with polyurethane foam. Acivodorax sp. CHX100 was chosen as inoculum due to its ability to use cyclohexane as carbon source. Performance was evaluated by means of different resident times from 18 s to 37 s and concentration levels of 60, 90, 120, 160, 320, 480 and 720 mg C m-3, respectively. Removal efficiencies of 80%-99% and elimination capacities in the range of 5.4 g C m-3 h-1-38 g C m-3 h-1 were achieved for concentrations among 60 mg C m-3-480 mg C m-3. The removal efficiency decreased to 40% at concentrations of cyclohexane of 720 mg C m-3. The dynamics of the microbial population showed the strain CHX100 as predominant during the different operational process of biotrickling filter. The results of this study propose a novel approach for cleaning waste air containing cyclohexane by means of a biotrickling filter.
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Affiliation(s)
- Diego Salamanca
- University of Stuttgart, Institute of Sanitary Engineering, Water Quality and Solid Waste Management, Department of Biological Waste Air Purification, Bandtäle 2, 70569 Stuttgart, Germany.
| | - Daniel Dobslaw
- University of Stuttgart, Institute of Sanitary Engineering, Water Quality and Solid Waste Management, Department of Biological Waste Air Purification, Bandtäle 2, 70569 Stuttgart, Germany
| | - Karl-H Engesser
- University of Stuttgart, Institute of Sanitary Engineering, Water Quality and Solid Waste Management, Department of Biological Waste Air Purification, Bandtäle 2, 70569 Stuttgart, Germany
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4
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Nguyen NT, Nguyen MTT, Nguyen HX, Dang PH, Dibwe DF, Esumi H, Awale S. Constituents of the Rhizomes of Boesenbergia pandurata and Their Antiausterity Activities against the PANC-1 Human Pancreatic Cancer Line. J Nat Prod 2017; 80:141-148. [PMID: 28099006 DOI: 10.1021/acs.jnatprod.6b00784] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Human pancreatic cancer cell lines have a remarkable tolerance to nutrition starvation, which enables them to survive under a tumor microenvironment. The search for agents that preferentially inhibit the survival of cancer cells under low nutrient conditions represents a novel antiausterity strategy in anticancer drug discovery. In this investigation, a methanol extract of the rhizomes of Boesenbergia pandurata showed potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrient-deprived conditions, with a PC50 value of 6.6 μg/mL. Phytochemical investigation of this extract led to the isolation of 15 compounds, including eight new cyclohexene chalcones (1-8). The structures of the new compounds were elucidated by NMR spectroscopic data analysis. Among the isolated compounds obtained, isopanduratin A1 (14) and nicolaioidesin C (15) exhibited potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrition-deprived conditions, with PC50 values of 1.0 and 0.84 μM, respectively.
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Affiliation(s)
- Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Dya Fita Dibwe
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
| | - Hiroyasu Esumi
- Research Institute for Biomedical Sciences, Tokyo University of Science , Chiba 278-8510, Japan
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
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Aoi A, Yamashita Y, Gao X, Uematsu M, Ota M, Takahashi K, Yoshihara T, Matsuura H. 3-O-β-D-Glucopyranosyltheobroxide from Aerial Parts of Cowpea (Vigna unguiculata). Nat Prod Commun 2016; 11:673-676. [PMID: 27319148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
Theobroxide has been isolated from culture filtrates of Lasiodiplodia theobromae as a potato tuber-inducing compound. In this study, the metabolism of theobroxide was investigated using cowpea as an experimental model and [2H3-7]theobroxide as a substrate for analyzing a metabolite, which revealed that theobroxide applied exogenously to the roots was converted into 3-O-β-D-glucopyranosyltheobroxide.
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6
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Tian JF, Yu RJ, Li XX, Gao H, Hu D, Guo LD, Tang JS, Yao XS. Cyclohexenones and isocoumarins from an endophytic fungus of Sarcosomataceae sp. J Asian Nat Prod Res 2015; 17:550-558. [PMID: 26022116 DOI: 10.1080/10286020.2015.1043904] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Three new cyclohexenones (1-3, named sarcosones A-C) and two new isocoumarins (4 and 5), together with five known isocoumarins (6-10), were isolated from the solid cultures of an endophytic fungus Sarcosomataceae sp. NO.49-14-2-1. Their chemical structures were elucidated by analyses of HR-ESI-TOF-MS, (1)H, (13)C NMR, (1)H-(1)H COSY, HSQC, and HMBC spectra. Their absolute configurations were determined via modified Mosher's method and circular dichroism spectra method.
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Affiliation(s)
- Jie-Feng Tian
- a College of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University , Shenyang 110016 , China
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7
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Johnson MS, Nilsson EJK, Svensson EA, Langer S. Gas-phase advanced oxidation for effective, efficient in situ control of pollution. Environ Sci Technol 2014; 48:8768-8776. [PMID: 24955878 DOI: 10.1021/es5012687] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this article, gas-phase advanced oxidation, a new method for pollution control building on the photo-oxidation and particle formation chemistry occurring in the atmosphere, is introduced and characterized. The process uses ozone and UV-C light to produce in situ radicals to oxidize pollution, generating particles that are removed by a filter; ozone is removed using a MnO2 honeycomb catalyst. This combination of in situ processes removes a wide range of pollutants with a comparatively low specific energy input. Two proof-of-concept devices were built to test and optimize the process. The laboratory prototype was built of standard ventilation duct and could treat up to 850 m(3)/h. A portable continuous-flow prototype built in an aluminum flight case was able to treat 46 m(3)/h. Removal efficiencies of >95% were observed for propane, cyclohexane, benzene, isoprene, aerosol particle mass, and ozone for concentrations in the range of 0.4-6 ppm and exposure times up to 0.5 min. The laboratory prototype generated a OH(•) concentration derived from propane reaction of (2.5 ± 0.3) × 10(10) cm(-3) at a specific energy input of 3 kJ/m(3), and the portable device generated (4.6 ± 0.4) × 10(9) cm(-3) at 10 kJ/m(3). Based on these results, in situ gas-phase advanced oxidation is a viable control strategy for most volatile organic compounds, specifically those with a OH(•) reaction rate higher than ca. 5 × 10(-13) cm(3)/s. Gas-phase advanced oxidation is able to remove compounds that react with OH and to control ozone and total particulate mass. Secondary pollution including formaldehyde and ultrafine particles might be generated, depending on the composition of the primary pollution.
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Affiliation(s)
- Matthew S Johnson
- Department of Chemistry, University of Copenhagen , Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
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8
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Abstract
The natural potato microtuber inducing substance, theobroxide, strongly induces the formation of tuber of potato (Solanum tuberosum L.) and flower bud of morning glory (Pharbitis nil) plants under non-inducing conditions (long days) (Yoshihara et al., 2000). In the present study, theobroxide was evaluated for its effect on the level of endogenous jasmonoids in different tissues of such two plants. An in vitro bioassay using cultures of single-node segments of potato stems was performed with the supplement of theobroxide in the medium. The endogenous jasmonic acid (JA) and its analogue tuberonic acid (TA, 12-hydroxyjasmonic acid) in segments and microtubers were quantitatively analyzed. The increase in the endogenous JA level caused by theobroxide was observed in both segments and microtubers. Endogenous TA was only detected in segments, and the content increased with the concentration of theobroxide. As for morning glory, the whole plant was sprayed with theobroxide for 1 ~ 5 weeks under different photoperiods and endogenous JA in the leaves was quantitatively analyzed. Theobroxide spraying increased the level of endogenous JA in the leaves of the plants grown under both long and short days.
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Affiliation(s)
- Qing Yang
- Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan.
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9
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Vansteelandt M, Blanchet E, Egorov M, Petit F, Toupet L, Bondon A, Monteau F, Le Bizec B, Thomas OP, Pouchus YF, Le Bot R, Grovel O. Ligerin, an antiproliferative chlorinated sesquiterpenoid from a marine-derived Penicillium strain. J Nat Prod 2013; 76:297-301. [PMID: 23360521 DOI: 10.1021/np3007364] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new chlorinated sesquiterpenoid analogue of fumagillin, ligerin (1), was isolated from a marine-derived strain of Penicillium, belonging to the subgenus Penicillium, along with the known compounds penicillic acid (2), orcinol, and orsellinic acid. Chemical structures were established by an interpretation of spectroscopic data including IR, UV, and HRESIMS, together with analyses of 1D and 2D NMR spectra and X-ray analysis for the determination of the absolute configuration. Ligerin (1) displayed strong inhibitory activity against an osteosarcoma cell line. This is the first report of the isolation of a fumagillin analogue from a marine-derived Penicillium strain.
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Dou B, Hu Q, Li J, Qiao S, Hao Z. Adsorption performance of VOCs in ordered mesoporous silicas with different pore structures and surface chemistry. J Hazard Mater 2011; 186:1615-1624. [PMID: 21216529 DOI: 10.1016/j.jhazmat.2010.12.051] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 12/10/2010] [Indexed: 05/27/2023]
Abstract
Ordered mesoporous silicas with different pore structures, including SBA-15, MCM-41, MCM-48 and KIT-6, were functionalized with phenyltriethoxysilane by a post-synthesis grafting approach. It was found that phenyl groups were covalently anchored onto the surface of mesoporous silicas, and the long-range ordering of the mesoporous channels was well retained after the surface functionalization. The static adsorption of benzene and the dynamic adsorption of single component (benzene) and bicomponent (benzene and cyclohexane) on the original and functionalized materials were investigated. As indicated by the adsorption study, the functionalized silicas exhibit improvement in the surface hydrophobicity and affinity for aromatic compounds as compared with the original silicas. Furthermore, the pore structure and the surface chemistry of materials can significantly influence adsorption performance. A larger pore diameter and cubic pore structure are favorable to surface functionalization and adsorption performance. In particular, the best adsorption performance observed with phenyl-grafted KIT-6 is probably related to the highest degree of surface functionalization, arising from the relatively large mesopores and bi-continuous cubic pore structure which allow great accessibility for the functional groups. In contrast, functionalized MCM-41 exhibits the lowest adsorption efficiency, probably owing to the small size of mesopores and 1D mesoporous channels.
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Affiliation(s)
- Baojuan Dou
- Department of Environmental Nano-Materials, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
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11
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Huang ZS, Pei YH, Shen YH, Lin S, Liu CM, Lu M, Zhang WD. Cyclohexyl-ethanol derivatives from the roots of Incarvillea mairei. J Asian Nat Prod Res 2009; 11:523-528. [PMID: 20183285 DOI: 10.1080/10286020902927872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Two new cyclohexyl-ethanol derivatives, incarvmareins A (1) and B (2), together with two known derivatives, 3 and 4, were isolated from the ethanolic extract of the roots of Incarvillea mairei. The structures of the new compounds were elucidated primarily on the basis of analysis of spectroscopic data.
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Affiliation(s)
- Zheng-Sheng Huang
- Department of Natural Medicinal Chemistry, School of Pharmacy, Second Military Medical University, Shanghai, China
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12
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Abstract
Seven structurally related new polyoxygenated methyl cyclohexanoids, ampelomins A-G (1-7), were isolated from the mycelial solid culture of a soil-derived Ampelomyces fungus. Their structures were determined by spectroscopic and chemical means. Ampelomins A (1), C (3), E (5), and G (7) exhibited weak activity against alpha-glucosidase with IC(50) values of 1.74-5.93 mM, and ampelomin A (1) showed moderate antibacterial activity with MIC(90) values ranging from 202.4 to 1015.9 microM. A plausible polyketide biogenetic pathway is postulated for these compounds.
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Affiliation(s)
- Huiye Zhang
- CAS Key Laboratory for Preservation and Sustainable Utilization of Plant Resources, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou 510650, People's Republic of China
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13
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Vetter W, Rosenfelder N, Kraan S, Hiebl J. Structure and origin of the natural halogenated monoterpene MHC-1 and its concentrations in marine mammals and fish. Chemosphere 2008; 73:7-13. [PMID: 18656231 DOI: 10.1016/j.chemosphere.2008.06.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Revised: 06/04/2008] [Accepted: 06/05/2008] [Indexed: 05/26/2023]
Abstract
The halogenated natural product previously named mixed-halogenated compound 1 (MHC-1) was isolated from the red seaweed Plocamium cartilagineum harvested in Helgoland, Germany. A total of 1.9 mg of pure MHC-1 was obtained from 1g air-dried seaweed. The 1H and 13C NMR data matched those reported for a natural monoterpene isolated from this species. Thus, the structure of MHC-1 was established to be (1R,2S,4R,5R,1'E)-2-bromo-1-bromomethyl-1,4-dichloro-5-(2'-chloroethenyl)-5-methylcyclohexane. Moreover, the isolated monoterpene proved to be identical with the compound previously detected in marine mammals and fish from different locations. In addition we examined two samples of P. cartilagineum from Ireland and from the Antarctic; however MHC-1 was only present at low levels. Not only the concentrations were lower but also the pattern of polybrominated compounds differed from MHC-1. A calibrated solution of MHC-1 was used to determine correct concentrations from samples where previously only estimates existed relative to the gas chromatography-electron capture detector (GC/ECD) response of trans-chlordane, which underrated the MHC-1 concentrations by more than factor 2. The highest MHC-1 concentration determined to date in marine mammals is 0.14 mg kg(-1) blubber. Significantly higher MHC-1 concentrations were determined in farmed fish with up to 2.2 mg kg(-1) lipids. The samples with high concentrations of MHC-1 have in common that they were collected in proximity of the natural habitats of P. cartilagineum.
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Affiliation(s)
- Walter Vetter
- Universität Hohenheim, Institut für Lebensmittelchemie (170b), Garbenstr. 28, D-70593 Stuttgart, Germany.
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14
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Mahidol C. Naturally occurring cyclohexene epoxides revisited. Ciba Found Symp 2007; 154:66-73; discussion 74-7. [PMID: 2086042 DOI: 10.1002/9780470514009.ch6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Cyclohexene epoxides are a small group of naturally occurring oxygenated cyclohexanes, most of which have been found in plants of the Uvaria genus. Some of these molecules possess pharmacological activity and have been isolated from plants that have been used in traditional medicine in Thailand. The biogenesis of these compounds was thought to have been fully explained when all the intermediates of a proposed synthetic pathway had been isolated from a single Uvaria species. Further studies on naturally occurring cyclohexene epoxides identified novel compounds, whose presence could not be explained by the accepted scheme. An alternative biosynthetic pathway that was formerly considered unfavourably appears to fit currently available evidence.
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Affiliation(s)
- C Mahidol
- Chulabhorn Research Institute, Bangkok, Thailand
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15
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Mikhaĭlitsyn FS, Gitsu GA. [Evaluation of the antihymenolepidous activity of cyclarin]. Med Parazitol (Mosk) 2007:51-2. [PMID: 17912839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
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16
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Fuangswasdi A, Krajangpan S, Sabatini DA, Acosta EJ, Osathaphan K, Tongcumpou C. Effect of admicellar properties on adsolubilization: column studies and solute transport. Water Res 2007; 41:1343-9. [PMID: 17267009 DOI: 10.1016/j.watres.2006.12.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Revised: 11/30/2006] [Accepted: 12/06/2006] [Indexed: 05/13/2023]
Abstract
Mixtures of anionic and cationic surfactants exhibit synergistic behavior as evidenced by low critical micelle concentrations (CMC) of the mixed system, increased surface activity, and improved detergency performance. The adsorption of a single-head anionic surfactant, sodium dodecyl sulfate (SDS), in mixture with a twin-head cationic surfactant, pentamethyl-octadecyl-1,3-propane diammonium dichloride (PODD), showed synergism of adsorption onto silica when present at a mixing ratio of 1:3 (cationic-rich), and also demonstrated lower surfactant desorption with water flushing of columns packed with the surfactant-modified media. In addition, the proportion of the mixed surfactants in the admicelles moved from the initial ratio of 1:3 towards equimolar after rinsing the surfactant-modified silica absorbent. The retardation of organic solutes passing through columns packed with modified-silica adsorbent increased nominally three fold for silica modified with mixed surfactants versus single surfactants (retardation factors increase from 4.0 to 12.8 for styrene and from 32.1 to 90.2 for ethylcyclohexane for single and mixed surfactants, respectively). Thus, this study demonstrates that mixed surfactant systems more effectively modified the silica surface than single surfactant systems both in terms of enhanced retardation of organic solutes and in terms of reduced surfactant desorption.
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Affiliation(s)
- A Fuangswasdi
- National Research Center, Environmental Hazardous Waste Management, Chulalongkorn University, Bangkok, Thailand
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17
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Ryge TS, Hansen PR. Potent antibacterial lysine-peptoid hybrids identified from a positional scanning combinatorial library. Bioorg Med Chem 2006; 14:4444-51. [PMID: 16524733 DOI: 10.1016/j.bmc.2006.02.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Revised: 02/10/2006] [Accepted: 02/17/2006] [Indexed: 10/24/2022]
Abstract
In this paper, we describe the synthesis and screening of a biased positional scanning library made up of peptoids (N-alkylglycines) and lysines. The library consisted of 100 mixtures divided into four sub-libraries; OXXXKKK, XOXXKKK, XXOXKKK, and XXXOKKK, O being a defined peptoid building block and X a mixture of 25 peptoid building blocks. A theoretical number of 390,625 compounds were synthesized. The compound mixtures were screened against the American Type Culture Collection (ATCC) Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 bacterial strains, and the cytotoxic activities were assessed using a human blood hemolytic assay. The results from each sub-library were examined to identify the most potent amine at each position. On the basis of this knowledge eight new lysine-peptoid hybrids were synthesized and tested in the biological assays. One compound in particular, [N-(cyclohexylmethyl)glycyl]-[N-(1-methylhexyl)glycyl]-[N-(4-methylbenzyl)glycyl]-[N-(2-(3-chlorophenyl)ethyl)glycyl]-lysyl-lysyl-lysine amide, showed high antibacterial activity and low toxicity toward red blood cells.
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Affiliation(s)
- Trine S Ryge
- Department of Natural Sciences, KVL, Frederiksberg, Copenhagen, Denmark
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18
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Kong F, Gao X, Nam KH, Takahashi K, Matsuura H, Yoshihara T. Inhibition of stem elongation in spinach by theobroxide. J Plant Physiol 2006; 163:557-61. [PMID: 16473660 DOI: 10.1016/j.jplph.2005.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Accepted: 05/13/2005] [Indexed: 05/06/2023]
Abstract
In the current study, we investigated the influences of theobroxide on stem elongation in spinach (Spinacia oleracea). Our results showed that stem elongation and flower formation were inhibited by spraying spinach plants with theobroxide under inductive, long day conditions (16 h light/8 h dark), while application of exogenous applied GA3 prevented the effect of theobroxide. Quantitative analysis showed that theobroxide suppressed GA1 biosynthesis, whereas the endogenous content of jasmonic acid was unchanged. However, under short day conditions (10 h light/14 h dark), there were no differences in stem length between treated and untreated plants. These results suggest that the inhibition of stem elongation by theobroxide is probably due to the suppression of gibberellin biosynthesis.
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Affiliation(s)
- Fanjiang Kong
- Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kitaku, Sapporo 060-8589, Japan.
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19
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Wood A, Armour D. The discovery of the CCR5 receptor antagonist, UK-427,857, a new agent for the treatment of HIV infection and AIDS. Prog Med Chem 2005; 43:239-71. [PMID: 15850827 DOI: 10.1016/s0079-6468(05)43007-6] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Anthony Wood
- Department of Chemistry, Pfizer Global Research and Development, Sandwich Laboratories, Sandwich, Kent, UK
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20
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Abstract
A monolithic molecularly imprinted polymer (monolithic MIP) was designed and prepared for chiral separation of nateglinide and its L-enantiomer. The enantiomers were rapidly separated on this novel monolithic MIP based chiral stationary phase (MIP-CSP), whereas the enantioseparation was not obtained on the non-imprinted polymer (NIP). Chiral recognition was found to be dependent on the stereo structures and the arrangement of functional groups of the imprinted molecule and the cavities on MIP. Thermodynamic data (deltadeltaH and deltadeltaS) obtained by Van't Hoff plots revealed an enthalpy-controlled enantioseparation. The binding capacity was evaluated by frontal analysis. Monolithic nateglinide-MIP had an effective number of binding sites Bt = 41.15 micromol g(-1) with a dissociation constant of Kd = 7.40 mM. The morphological characteristics of the monolithic MIP were investigated by pore analysis and scanning electron microscope (SEM). Results showed that both mesopores and macropores were formed in the monolith. Over all, this study presents a new and practical possibility for providing high rates of mass transfer, fast separations and high efficiencies without the pressure constraints of the traditional bulk molecularly imprinted polymers, through the monolithic MIPs.
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Affiliation(s)
- Junfa Yin
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, PR China
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21
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Jerz G, Waibel R, Achenbach H. Cyclohexanoid protoflavanones from the stem-bark and roots of Ongokea gore. Phytochemistry 2005; 66:1698-706. [PMID: 15922375 DOI: 10.1016/j.phytochem.2005.04.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2005] [Revised: 04/14/2005] [Accepted: 04/14/2005] [Indexed: 05/02/2023]
Abstract
Phytochemical investigation of root and stem-bark of the West African medicinal plant Ongokea gore resulted in the isolation of four novel flavonoids with an unusual cyclohexyl substituent instead of the common aromatic ring B. The structures of the isolated compounds were elucidated by spectroscopic methods, mainly 1D and 2D NMR, and subsequently, the structures were corroborated by chemical conversion to (-)-(S)-sakuranetin. The absolute configurations, and preferred conformations were determined by NOE experiments and CD measurements.
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Affiliation(s)
- Gerold Jerz
- Institute of Food Chemistry, Technical University of Braunschweig, Schleinitz-Strasse 20, D-38106 Braunschweig, Germany.
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22
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Aziz-Ur-Rehman AUR, Malik A, Riaz N, Nawaz HR, Ahmad H, Nawaz SA, Choudhary MI. Lipoxygenase inhibitory constituents from Periploca aphylla. J Nat Prod 2004; 67:1450-1454. [PMID: 15387640 DOI: 10.1021/np030494o] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bisflavan-3-ols 1 and 2 and norterpenoid 3 have been isolated from the methanolic extract of the whole plant of Periploca aphylla. Their structures have been assigned on the basis of spectroscopic analysis including 1D and 2D NMR techniques. In addition, o-phthalic acid bis(2-ethylnonyl) ester (4), 1,3,6-trihydroxy-2,5-dimethoxyxanthone (5), and (+)-lyoniresinol (6) have been reported for the first time from this species. Compounds 1-3 displayed evident inhibitory potential against the enzyme lipoxygenase in a concentration-dependent fashion with IC(50) values 19.7, 13.5, and 150.1 microM, respectively.
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Affiliation(s)
- Aziz-Ur-Rehman Aziz-Ur-Rehman
- International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan
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23
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Ma Y, Lang L, Kiesewetter DO, Vuong BK, Channing M, Ito Y, Eckelman WC. Purification of the precursor for the automated radiosynthesis of []FCWAY by counter-current chromatography. J Chromatogr A 2004; 1034:149-53. [PMID: 15116924 DOI: 10.1016/j.chroma.2004.01.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Radiolabeled FCWAY (N-(2-[4-(2-methoxyphenyl)piperazino])-N-(2-pyridinyl) trans-4-fluorocyclohexanecarboxamide) was prepared for human positron emission tomography (PET) studies by a simple one-step radiosynthesis. The LC-MS analysis of the products indicated that it contained impurities which may interfere with FCWAY uptake of 5-HT1A receptors and that these impurities were derived from an impurity originally present in the precursor preparation. Since preparative HPLC failed to resolve one of the impurities from the precursor, preparative-scale high-speed counter-current chromatography (HSCCC) was used for purification of this FCWAY precursor. A suitable two-phase solvent system composed of cyclohexane-ethyl acetate-methanol-water at a volume ratio of 1:1:1:1 or 4:5:4:5 was selected based on the partition coefficients of the precursor and impurity as determined by a LC-MS method. Using the second solvent ratio of 4:5:4:5 with the organic phase as a mobile phase, a 2.57 g amount of precursor preparation was successfully purified yielding 2.2 g of the pure precursor by a single run.
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Affiliation(s)
- Ying Ma
- PET Department, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bldg 10, Rm 1C401, 10 Center Drive MSC 1180, Bethesda, MD 20892, USA.
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24
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Li X, Choi HD, Kang JS, Lee CO, Son BW. New polyoxygenated farnesylcyclohexenones, deacetoxyyanuthone A and its hydro derivative from the marine-derived fungus Penicillium sp. J Nat Prod 2003; 66:1499-1500. [PMID: 14640527 DOI: 10.1021/np030231u] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
New polyoxygenated farnesylcyclohexenones, 7-deacetoxyyanuthone A (1) and its 2,3-hydro derivative (2), were isolated together with the known farnesylquinones (3, 4) from a marine isolate of the genus Penicillium. The structures of the new deacetoxyyanuthone A (1) and its 2,3-hydro derivative (2) were assigned by spectroscopic methods, including 2D NMR and CD for the Cotton effect of alpha-epoxyketone experiments. Compounds 1 and 3 showed moderate in vitro cytotoxicity in a panel of five human tumor cell lines, and 1 also exhibited mild in vitro antibacterial activity against methicillin-resistant and multidrug-resistant Staphylococcus aureus (MIC, 50 microg/mL).
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Affiliation(s)
- Xifeng Li
- Department of Chemistry, Pukyong National University, Busan 608-737, Korea
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25
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Siddiqui BS, Ismail FAS, Gulzar T, Begum S. Isolation and Structure Determination of a Benzofuran and a Bis-Nor-Isoprenoid fromAspergillus NigerGrown on the Water Soluble Fraction ofMorinda CitrifoliaLinn. Leaves. Nat Prod Res 2003; 17:355-60. [PMID: 14526916 DOI: 10.1080/1057563031000075485] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The leaves of Morinda citrifolia, Linn. afforded a new benzofuran and a bis-nor-isoprenoid, blumenol C, hitherto unreported from this source. The structures of these have been elucidated as 5-benzofuran carboxylic acid-6-formyl methyl ester (1) and 4-(3'(R)-hydroxybutyl)-3,5,5, trimethyl-cyclohex-2-en-1-one (2) respectively through spectroscopic studies. The NMR data (including 1D, 2D techniques) and stereochemistry at C-3' of Compound 2 is also being reported for the first time.
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Affiliation(s)
- Bina S Siddiqui
- H.E.J. Research Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan.
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26
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Abstract
Three polyketide compounds, surinone A, surinone B, surinone C and one acylresorcinol, suranone, along with thirty known compounds, were isolated from the whole plant of Peperomia sui. Their structures were elucidated from spectral analysis. Several compounds showed cytotoxic activity against HONE-1 and NUGC-3 cell lines in vitro.
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Affiliation(s)
- Ming-Jen Cheng
- Graduate Institute of Pharmaceutical Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan 807, Republic of China
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27
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Butcher RA, Schreiber SL. A small molecule suppressor of FK506 that targets the mitochondria and modulates ionic balance in Saccharomyces cerevisiae. Chem Biol 2003; 10:521-31. [PMID: 12837385 DOI: 10.1016/s1074-5521(03)00108-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
FK506 inhibits the evolutionarily conserved, Ca(2+)-dependent phosphatase calcineurin, which in yeast is essential for growth during sodium stress. We undertook a chemical genetic modifier screen to identify small molecules that suppress the ability of FK506 to inhibit yeast growth in high NaCl. One of these small molecule suppressors, SFK1 (suppressor of FK506 1), causes a mitochondrially induced death in low salt, concomitant with the release of reactive oxygen species. Biochemically, SFK1 interacts with Por1p, a channel protein in the outer mitochondrial membrane, suggesting that SFK1 interacts with the mitochondria directly. A genome-wide screen of yeast deletion strains for hypersensitivity to SFK1 yielded several strains with impaired mitochondrial function, as well as several with reduced sodium tolerance. Our data link ionic balance to mitochondrial function and suggest a role for calcineurin in mediating this signaling network.
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Affiliation(s)
- Rebecca A Butcher
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA 02138, USA
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28
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Pan X, Qin Y, Chen R, Yu D. [Study on the polyoxygenated cyclohexenes from Uvaria boniana]. Yao Xue Xue Bao 2002; 33:275-81. [PMID: 11939067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Seven new polyoxygenated cyclohexenes, named uvaribonol A-G (1-7) have been isolated from the ethanol extract of the stems of Uvaria boniana Finet. (Annonaceae), and their structures, including the absolute configuration, were determined by spectral and chemical methods. In vitro cytotoxicity test against several human tumor cell lines indicated that all of the new natural compounds are inactive, but some of the derivatives showed obvious activities. Compound 2a is the most active, exhibiting significant cytotoxicities against KB and Bel7402 cells with IC50 < 1 microgram.ml-1, and against HCT-8 cell with IC50 < 0.1 microgram.ml-1.
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Affiliation(s)
- X Pan
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050
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29
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Kijjoa A, Bessa J, Pinto MMM, Anatachoke C, Silva AMS, Eaton G, Herz W. Polyoxygenated cyclohexene derivatives from Ellipeiopsis cherrevensis. Phytochemistry 2002; 59:543-549. [PMID: 11853750 DOI: 10.1016/s0031-9422(01)00465-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Aerial parts of Ellipeiopsis cherrevensis contained the polyoxygenated cyclohexenes zeylenol, ferrudiol and three analogs, ellipeiopsols A, B and C. The C-1 stereochemistry of ferrudiol has been revised.
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Affiliation(s)
- Anake Kijjoa
- Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, 4099-003, Porto, Portugal
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30
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Kou DM, Wu JM, Li ZY, Liu M, Xiang SH. [Preparation and evaluation of in-situ synthesis zeolite gas-liquid modified columns]. Se Pu 2001; 19:541-3. [PMID: 12545470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
A new kind of NaA zeolite column has been prepared by in-situ synthesis technique. In comparing with traditional coating method, the in-situ NaA zeolite carrier is much more uniform and rigid. Several kinds of zeolite gas-liquid modified columns have been prepared with this in-situ technology, which showed satisfactory features in separation property and thermal stability. The successful utilization of mini-length and wide-bore columns showed good practical prospect of this new kind of zeolite column.
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Affiliation(s)
- D M Kou
- Department of Chemistry, Nankai University, Tianjin 300071, China.
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31
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Vijayakumar EK, Roy K, Hiremath CP, Deshmukh SK, Mukhopadhyay T, Kogler H. L 970843 and L 970844, two new antifungal metabolites from an unidentified fungal species HIL Y-903146. J Antibiot (Tokyo) 2001; 54:973-6. [PMID: 11827041 DOI: 10.7164/antibiotics.54.973] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- E K Vijayakumar
- Research Centre, Hoechst Marion Roussel, Mulund, Mumbai, India.
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32
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Xu S, Cen Y, Cai L, Li Y, Xu S. [Studies on the chemical components from Sargassum fusiform]. Zhong Yao Cai 2001; 24:491-2. [PMID: 11668740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Three compounds have been isolated from Sargassum fusiform collected from nanao island. Based on the spectral data and elemental analysis, they were identified as 2,4-dihydroxy-2,6-trimethyl-delta 1,alpha-cyclohexaneacetic-r-lactone, saringosterol and cedrol.
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Affiliation(s)
- S Xu
- Department of Chemistry, Jinan University, Guangzhou 510632
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33
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Abstract
Two novel polyoxygenated cyclohexenes, 6-methoxyzeylenol (3) and 2-acetoxyzeylenone (4), together with two known compounds, zeylenol (1) and zeylenone (2), were isolated from the heartwood of the Chinese tree, Uvaria purpurea. Zeylenol (1) and zeylenone (2) both showed inhibitory activity toward the root growth of Lactuca sativa. Their structures were established by spectroscopic and chemical methods.
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Affiliation(s)
- Y Takeuchi
- Laboratory of Applied Bioorganic Chemistry, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
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34
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Abstract
The novel naturally occurring 2-octanoylcyclohexane-1,3-dione 1 was isolated in its enol form from P. guttiferum (Araceae). Its chemical ecological relevance is discussed. There was mass spectral evidence for the presence of small amounts of the homologous 2-decanoyl and 2-dodecanoyl derivatives.
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Affiliation(s)
- H R el-Seedi
- Department of Pharmacy, Biomedical Centre, Uppsala University, Box 579, S-57123 Uppsala, Sweden
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35
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Seeram NP, Lewis AW, Jacobs H, Nair MG, McLean S, Reynolds WF. Proctoriones A-C: 2-acylcyclohexane-1,3-dione derivatives from peperomia proctorii. J Nat Prod 2000; 63:399-402. [PMID: 10757730 DOI: 10.1021/np990447p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The structures of three new compounds isolated from Peperomia proctorii, named proctoriones A-C, have been established by spectroscopic and chemical methods as 2,3-dihydro-5, 8-dihydroxy-2-pentadecyl-4H-benzopyran-4-one (1) and enolic forms of 4-hydroxy-2-octadecanoylcyclohexane-1,3-dione (2) and 4-hydroxy-2-octadec-(11Z)-enoylcyclohexane-1,3-dione (3).
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Affiliation(s)
- N P Seeram
- Department of Chemistry, University of the West Indies, Mona, Jamaica
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36
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Abstract
Jacaranone (1), the related new dimethoxy derivative 2, and known triterpenoids were isolated from the aerial parts of Senecio minutus. The aerial parts and the rhizomes of Senecio boissieri afforded the furanoeremophilanes 3 and 4 and known triterpenoids.
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Affiliation(s)
- P Torres
- Departamentos de Química Orgánica y de Química Farmacéutica, Universidad de Salamanca, E-37008, Salamanca, Spain
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37
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Abstract
Two new constituents with a novel basic skeleton were isolated from Erigeron breviscapus. On the basis of chemical and spectroscopic evidences, the structures of the new compounds were elucidated as 1R,3R-dihydroxy-4S,5R-dicaffeoyloxy cyclohexane carboxylic acid methyl ester (V), 1,4-dihydroxy-3R,5R-dicaffeoyloxy cyclohexane carboxylic acid methyl ester (VI).
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Affiliation(s)
- W D Zhang
- College of Pharmacy, Second Military Medical University, Shanghai, China
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38
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Abstract
From the leaves of Alangium platanifolium var. platanifolium collected in Fukuoka Prefecture, Japan, three megastigmane diglycosides (1-3) were isolated, along with two known compounds, benzyl alcohol 7-O-beta-D-(6'-O-beta-D-xylopyranosyl)glucopyranoside and Z-hex-3-en-1-ol 1-O-beta-D-glucopyranoside. The structures of the new compounds, named platanionosides A (1), B (2), and C (3) were elucidated by spectroscopic evidence to be 3S,5R,6R,9R, 7E-megastigma-3,9-diol 3,9-di-O-beta-D-glucopyranoside, 3R,9R, 7E-megastigma-5,7-diene-3,9-diol 3,9-di-O-beta-D-glucopyranoside, and 5R,6S,7E-megastigma-3-on-7-en-9-ol 9-O-beta-D-(6'-O-beta-D-xylopyranosyl)glucopyranoside, respectively.
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Affiliation(s)
- A Tamaki
- Institute of Pharmaceutical Sciences, Hiroshima University Faculty of Medicine, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
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39
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Abstract
Five new polyoxygenated cyclohexenes, named uvacalol A (1), B (2), C (3), D (4) and E (5) were isolated from the roots of Uvaria calamistrata. On the basis of spectral analysis and chemical derivatization, including the preparation of Mosher esters, the structures of compound 1-5 were established as (2R,3S,4R,5S)-2-acetoxyl-5-ethoxyl-1-benzoyloxymethylcyclohex-1(6)-ene3,4-diol-3-benzoate, (2R,3S,4R,5S)-2-acetoxyl-5-ethoxyl-1-benzoyloxymethylcyclohex-1(6)-ene-3,4-diol-4-benzoate, (2R,3S,4R,5S)-5-ethoxyl-1-benzoyloxymethylcyclohex-1(6)-ene-2,3,4-triol-3-benzoate, (2R,3S,4R,5S)-3-methoxyl-1-benzoyloxymethylcyclohex-1(6)-ene-2,3,5-triol and (2R,3S,4R,5S)-2-acetoxyl-1-benzoyloxymethylcyclohex-1(6)-ene-3,4,5-triol-5-benzoate, respectively.
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Affiliation(s)
- G X Zhou
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing
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40
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Pan XP, Yu DQ, He CH, Chai JJ. [The structural elucidation of new polyoxygenated cyclohexenes from Uvaria grandiflora]. Yao Xue Xue Bao 1997; 32:530-5. [PMID: 11596279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Four new polyoxygenated cyclohexenes, named uvarigranol A(1), B(2), E(3) and F(4), along with the known zeylenol were obtained from the roots of Uvaria grandiflora Roxb (Annonaceae). Based on spectral and X-ray analysis as well as Mosher methodology, their structures and absolute configuration were established.
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Affiliation(s)
- X P Pan
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050
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41
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Saito K, Utsumi Y. Enhancing effect of UV-light on the accumulation of carthamine in dyer's saffron florets. Z NATURFORSCH C 1996; 51:667-70. [PMID: 8921633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
UV-C (254 nm)- and UV-B (280-320 nm)-light were irradiated onto bright-yellow capitula of dyer's saffron and their effects on carthamine accumulation compared. UV-C light promotes reddening of florets more prominently than UV-B light, yielding higher amounts of carthamine after the radiation process. The enhancement of carthamine synthesis by UV-C light was investigated on cellulose columns loaded with floret extracts under O2-sufficient or O2-deficient conditions. Externally charged O2 inhibits the UV-C- stimulated carthamine formation. The results are discussed in relation to light stimulation of carthamine synthesis in dyer's saffron florets.
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Affiliation(s)
- K Saito
- Department of Bioscience and Technology, School of Engineering, Hokkaido Tokai University, Sapporo, Japan
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Otsuka H, Yao M, Kamada K, Takeda Y. Alangionosides G-M: glycosides of megastigmane derivatives from the leaves of Alangium premnifolium. Chem Pharm Bull (Tokyo) 1995; 43:754-9. [PMID: 7553962 DOI: 10.1248/cpb.43.754] [Citation(s) in RCA: 105] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Phytochemical investigation of the 1-BuOH-soluble fraction of the MeOH extract of Alangium premnifolium resulted in the isolation of ten megastigmane glycosides, of which, two, (6R,9R)-3-oxo-alpha-ionol apiofuranosylglucopyranoside and roseoside with (6S,9R)-blumeol A as an aglycone were known. The structures of the eight new compounds were determined by spectroscopic methods.
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Affiliation(s)
- H Otsuka
- Institute of Pharmaceutical Sciences, Hiroshima University School of Medicine, Japan
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Teshima Y, Shin-ya K, Shimazu A, Furihata K, Chul HS, Furihata K, Hayakawa Y, Nagai K, Seto H. Isolation and structural elucidation of pyridoxatin, a free radical scavenger of microbial origin. J Antibiot (Tokyo) 1991; 44:685-7. [PMID: 2071495 DOI: 10.7164/antibiotics.44.685] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Xie JM, Chen YS, Zhao SN, Zhou XD. [Studies on the chemical constituents of Excoecaria cochinchinensis Lour. var. viridis Merr]. Zhongguo Zhong Yao Za Zhi 1989; 14:292-4, 319. [PMID: 2512946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Eight compounds have been obtained from the root and stem of Excoecaria cochinchinensis var. viridis growing in Tonghai county of Yunnan province. According to their spectroscopic analyses and physicochemical constants, they have been identified as: shikimic acid, 1-cyclohexene-1-carboxylic acid-5-hydroxy-3,4-isopropylidene-dioxy, oxy-bis(5-methylene-2-furaldehyde), beta-sitosterol, tetracosanoic acid, palmic acid, steric acid and hentriacontane.
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Becker WM, Löning T, Bleese E, Kabisch H. [Ep 1 and Ep 2--2 new monoclonal antibodies against human T-lymphocytes: candidates for therapeutic use?]. Immun Infekt 1984; 12:105-6. [PMID: 6398793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The cytotoxic monoclonal antibodies Ep 1 and Ep 2 are directed against human T-cells recognizing structures different from the antigens Leu 1 to 5. Our results, so far, encourage the investigation of these antibodies as substitution of ATG in transplantation medicine.
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Powell GM, Olavesen AH, Curtis CG. Biliary excretion of cyclohexylphenyl 4-[35S]sulphate in the guinea pig. Biochem J 1978; 176:443-8. [PMID: 743252 PMCID: PMC1186252 DOI: 10.1042/bj1760443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The metabolic fate and mode of excretion of cyclohexylphenyl 4-[35S]sulphate were studied in the guinea pig. Up to 54.8% of the dose appeared in the bile, the majority as unchanged ester. Substantial amounts of hydroxylated cyclohexylphenyl 4-[35S]sulphate were also excreted in the bile together with minor amounts of the corresponding glucuronic acid conjugate. When isolated guinea-pig livers were perfused with cyclohexylphenyl 4-[35S]sulphate the biliary components were the same as those in the intact animal, although the relative concentration of the hydroxylated derivative was significantly greater. When the hydroxylated derivative was re-injected into guinea pigs it was excreted almost entirely unchanged in the bile. However, in the rat, it was excreted in the bile as a glucuronic acid conjugate. These findings are discussed in relation to studies carried out in the rat [Hearse, Powell, Olavesen & Dodgson (1969) Biochem. Pharmacol. 18, 181--195] and to differences in enzyme activities in rat and guinea-pig liver. The results are also discussed in terms of the molecular-weight threshold for the excretion of anions in guinea-pig bile.
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Kadkol MV, Gopalkrishnan KS, Narasimhachari N. Isolation and characterization of naphthaquinone pigments from Torula herbarum (Pers.). Herbarin and dehydroherbarin. J Antibiot (Tokyo) 1971; 24:245-8. [PMID: 5572751 DOI: 10.7164/antibiotics.24.245] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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