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Nachtergael A, Lanterbecq D, Spanoghe M, Belayew A, Duez P. Effects of Chemopreventive Natural Compounds on the Accuracy of 8-oxo-7,8-dihydro-2'-deoxyguanosine Translesion Synthesis. PLANTA MEDICA 2021; 87:868-878. [PMID: 34237787 DOI: 10.1055/a-1527-1435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Translesion synthesis is a DNA damage tolerance mechanism that relies on a series of specialized DNA polymerases able to bypass a lesion on a DNA template strand during replication or post-repair synthesis. Specialized translesion synthesis DNA polymerases pursue replication by inserting a base opposite to this lesion, correctly or incorrectly depending on the lesion nature, involved DNA polymerase(s), sequence context, and still unknown factors. To measure the correct or mutagenic outcome of 8-oxo-7,8-dihydro-2'-deoxyguanosine bypass by translesion synthesis, a primer-extension assay was performed in vitro on a template DNA bearing this lesion in the presence of nuclear proteins extracted from human intestinal epithelial cells (FHs 74 Int cell line); the reaction products were analyzed by both denaturing capillary electrophoresis (to measure the yield of translesion elongation) and pyrosequencing (to determine the identity of the nucleotide inserted in front of the lesion). The influence of 14 natural polyphenols on the correct or mutagenic outcome of translesion synthesis through 8-oxo-7,8-dihydro-2'-deoxyguanosine was then evaluated in 2 experimental conditions by adding the polyphenol either (i) to the reaction mix during the primer extension assay; or (ii) to the culture medium, 24 h before cell harvest and nuclear proteins extraction. Most of the tested polyphenols significantly influenced the outcome of translesion synthesis, either through an error-free (apigenin, baicalein, sakuranetin, and myricetin) or a mutagenic pathway (epicatechin, chalcone, genistein, magnolol, and honokiol).
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Affiliation(s)
- Amandine Nachtergael
- Unit of Therapeutic Chemistry and Pharmacognosy, Research Institute for Health Sciences and Technology, University of Mons (UMONS), Mons, Belgium
| | - Déborah Lanterbecq
- Laboratory of Biotechnology and Applied Biology, Haute Ecole Provinciale de Hainaut CONDORCET, Ath, Belgium
| | - Martin Spanoghe
- Laboratory of Biotechnology and Applied Biology, Haute Ecole Provinciale de Hainaut CONDORCET, Ath, Belgium
| | - Alexandra Belayew
- Department of Metabolic and Molecular Biochemistry, Research Institute for Health Sciences and Technology, University of Mons (UMONS), Mons, Belgium
| | - Pierre Duez
- Unit of Therapeutic Chemistry and Pharmacognosy, Research Institute for Health Sciences and Technology, University of Mons (UMONS), Mons, Belgium
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Hirai M, Kobori R, Doge R, Tsuji I, Saito A. Efficient Concentration of Functional Polyphenols Using Their Interaction with Gelatin. Foods 2021; 10:698. [PMID: 33805993 PMCID: PMC8064473 DOI: 10.3390/foods10040698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/17/2021] [Accepted: 03/19/2021] [Indexed: 12/12/2022] Open
Abstract
Among polyphenol compounds, the flavan-3-ol structure, which is the basic unit of green tea catechins and the galloyl groups contained in green tea catechins are known to exhibit various functions. In this paper, we discuss how to concentrate highly functional polyphenol compounds by exploiting the interaction between gelatin and the catechol structures. First, we confirmed the interaction between heat-stabilized gelatin and flavan-3-ol derivatives, including synthesized compounds. When green tea leaf extract containing a large amount of flavan-3-ol derivatives was incubated with gelatin, most of the polyphenol compounds it contained were adsorbed. Because the compounds adsorbed on gelatin could not be eluted, DPPH radical and ABTS radical scavenging activity tests were conducted using the as-prepared gelatin-polyphenol complex. Radical scavenging activity was observed when the compounds were adsorbed on gelatin and heating at 90 °C for 5 min did not have a significant effect on their activity. These results suggest that functional polyphenols can be efficiently concentrated using heat-stabilized gelatin and retain their functionality while adsorbed.
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Affiliation(s)
| | | | | | | | - Akiko Saito
- Graduate School of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan; (M.H.); (R.K.); (R.D.); (I.T.)
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3
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Qu Z, Liu A, Li P, Liu C, Xiao W, Huang J, Liu Z, Zhang S. Advances in physiological functions and mechanisms of (-)-epicatechin. Crit Rev Food Sci Nutr 2020; 61:211-233. [PMID: 32090598 DOI: 10.1080/10408398.2020.1723057] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
(-)-Epicatechin (EC) is a flavanol easily obtained through the diet and is present in tea, cocoa, vegetables, fruits, and cereals. Recent studies have shown that EC protects human health and exhibits prominent anti-oxidant and anti-inflammatory activities, enhances muscle performance, improves symptoms of cardiovascular and cerebrovascular diseases, prevents diabetes, and protects the nervous system. With the development of modern medical and biotechnology research, the mechanisms of action associated with EC toward various chronic diseases are becoming more apparent, and the pharmacological development and utilization of EC has been increasingly clarified. Currently, there is no comprehensive systematic introduction to the effects of EC and its mechanisms of action. This review presents the latest research progress and the role of EC in the prevention and treatment of various chronic diseases and its protective health effects and provides a theoretical basis for future research on EC.
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Affiliation(s)
- Zhihao Qu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Ailing Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China
| | - Penghui Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Changwei Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Wenjun Xiao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Jianan Huang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
| | - Sheng Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China
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4
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Kobori R, Hashimoto S, Koshimizu H, Yakami S, Hirai M, Noro K, Kawasaki T, Saito A. Flavan-3-ols Content in Red Raspberry Leaves Increases under Blue Led-Light Irradiation. Metabolites 2019; 9:E56. [PMID: 30901937 PMCID: PMC6468916 DOI: 10.3390/metabo9030056] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 03/18/2019] [Accepted: 03/20/2019] [Indexed: 01/15/2023] Open
Abstract
Berry fruits are well known to contain large amounts of polyphenol compounds. Among them, flavan-3-ol derivatives are a group of secondary metabolism compounds currently attracting a great deal of attention owing to their health benefits. Not only the fruits, but also the leaves of raspberry plants, are highly esteemed for tea making around the world and are largely used for food. In this report, we discuss the results of our study on the effect of light and temperature on polyphenol accumulation in raspberry leaves. When raspberry was cultivated in a plant factory unit and light intensity, wavelength, and temperature were varied, the amount of total polyphenol increased under blue light. Quantitative determination of (+)-catechin, (⁻)-epicatechin, procyanidin B4, flavan-3-ol trimer, which are flavan-3-ol derivatives, was carried out using HPLC, whereby we confirmed their increase under blue light. Semi-quantitative RT-PCR showed correlation between chalcone synthase (CHS) gene expression and the amounts of the compounds measured in the leaves.
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Affiliation(s)
- Ryo Kobori
- Graduate School of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
| | - Seiya Hashimoto
- Faculty of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
| | - Hayato Koshimizu
- Faculty of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
| | - Shuich Yakami
- Graduate School of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
| | - Mizuki Hirai
- Graduate School of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
| | - Kenta Noro
- Graduate School of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
| | - Takashi Kawasaki
- Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan.
| | - Akiko Saito
- Graduate School of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
- Faculty of Engineering, Osaka Electro-Communication University (OECU), 18-8 Hatsu-cho, Neyagawa-shi, Osaka 572-8530, Japan.
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Cruz L, Fernandes I, Guimarães M, de Freitas V, Mateus N. Enzymatic synthesis, structural characterization and antioxidant capacity assessment of a new lipophilic malvidin-3-glucoside–oleic acid conjugate. Food Funct 2016; 7:2754-62. [DOI: 10.1039/c6fo00466k] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enzymatic synthesis of a novel lipophilic malvidin-3-glucoside–oleic acid conjugate for potential technological applications.
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Affiliation(s)
- Luis Cruz
- REQUIMTE/LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
| | - Iva Fernandes
- REQUIMTE/LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
| | - Marta Guimarães
- REQUIMTE/LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
| | - Victor de Freitas
- REQUIMTE/LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
| | - Nuno Mateus
- REQUIMTE/LAQV
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto
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6
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Zobel M, Schäfer HJ. Synthesis of fatty acid conjugates with phenols, carbohydrates, amines, and CH‐acidic compounds by Pd(0)‐catalyzed allylic substitution. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201500195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Michael Zobel
- Organisch‐Chemisches Institut der Westfälischen Wilhelms‐UniversitätMünsterGermany
| | - Hans J. Schäfer
- Organisch‐Chemisches Institut der Westfälischen Wilhelms‐UniversitätMünsterGermany
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7
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3-O-Acyl-epicatechins Increase Glucose Uptake Activity and GLUT4 Translocation through Activation of PI3K Signaling in Skeletal Muscle Cells. Int J Mol Sci 2015; 16:16288-99. [PMID: 26193264 PMCID: PMC4519950 DOI: 10.3390/ijms160716288] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 06/25/2015] [Accepted: 07/14/2015] [Indexed: 11/17/2022] Open
Abstract
Tea catechins promote glucose uptake in skeletal muscle cells. In this study, we investigated whether the addition of an acyl group to the C-3 position of catechins to generate 3-O-acyl-catechins promoted glucose uptake in L6 myotubes. 3-O-Myristoyl-(−)-epicatechin (EC-C14) and 3-O-palmitoyl-(−)-epicatechin (EC-C16) promoted glucose uptake and translocation of glucose transporter (GLUT) 4 in the cells. The effect of 3-O-acyl-(−)-epicatechins was stronger than that of (−)-epicatechin (EC), whereas neither 3-O-myristoyl-(+)-catechin (C-C14) nor 3-O-palmitoyl-(+)catechin (C-C16) promoted glucose uptake or GLUT4 translocation as well as (+)-catechin (C). We further investigated an affinity of catechins and 3-O-acyl-catechins to the lipid bilayer membrane by using surface plasma resonance analysis. Maximum binding amounts of EC-C16 and C-C16 to the lipid bilayer clearly increased compared with that of (−)-EC and (+)-C, respectively. We also examined the mechanism of GLUT4 translocation and found EC-C14 and EC-C16 induced the phosphorylation of PI3K, but did not affect phosphorylation of Akt or IR. In conclusion, the addition of an acyl group to the C-3 position of (−)-EC increases its affinity for the lipid bilayer membrane and promotes GLUT4 translocation through PI3K-dependent pathways in L6 myotubes.
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8
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Cruz L, Fernandes VC, Araújo P, Mateus N, de Freitas V. Synthesis, characterisation and antioxidant features of procyanidin B4 and malvidin-3-glucoside stearic acid derivatives. Food Chem 2015; 174:480-6. [DOI: 10.1016/j.foodchem.2014.11.062] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 10/10/2014] [Accepted: 11/10/2014] [Indexed: 10/24/2022]
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9
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Liu L, Jin C, Zhang Y. Lipophilic phenolic compounds (Lipo-PCs): emerging antioxidants applied in lipid systems. RSC Adv 2014. [DOI: 10.1039/c3ra44792h] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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10
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Potential for preventive effects of cocoa and cocoa polyphenols in cancer. Food Chem Toxicol 2013; 56:336-51. [DOI: 10.1016/j.fct.2013.02.020] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 02/04/2013] [Accepted: 02/06/2013] [Indexed: 12/20/2022]
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11
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Maruo S, Kuriyama I, Kuramochi K, Tsubaki K, Yoshida H, Mizushina Y. Inhibitory effect of novel 5-O-acyl juglones on mammalian DNA polymerase activity, cancer cell growth and inflammatory response. Bioorg Med Chem 2011; 19:5803-12. [PMID: 21903399 DOI: 10.1016/j.bmc.2011.08.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 08/09/2011] [Accepted: 08/10/2011] [Indexed: 10/17/2022]
Abstract
We previously found that vitamin K(3) (menadione, 2-methyl-1,4-naphthoquinone) inhibits the activity of human mitochondrial DNA polymerase γ (pol γ). In this study, we focused on juglone (5-hydroxy-1,4-naphthoquinone), which is a 1,4-naphthoquinone derivative, and chemically synthesized novel juglones conjugated with C2:0 to C22:6 fatty acid (5-O-acyl juglones). The chemically modified juglones enhanced mammalian pol inhibition and their cytotoxic and anti-inflammatory activities. The juglone conjugated with oleic acid (C18:1-acyl juglone) showed the strongest inhibition of DNA replicative pol α activity and human colon carcinoma (HCT116) cell growth in 10 synthesized 5-O-acyl juglones. C12:0-Acyl juglone was the strongest inhibitor of DNA repair-related pol λ, as well as the strongest suppression of the production of tumor necrosis factor (TNF)-α production induced by lipopolysaccharide (LPS) in the compounds tested. Moreover, this compound caused the greatest reduction in 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced acute inflammation in mouse ears. C12:0- and C18:1-Acyl juglones selectively inhibited the activities of mammalian pol species, but did not influence the activities of other pols and DNA metabolic enzymes tested. These data indicate that the novel 5-O-acyl juglones target anti-cancer and/or anti-inflammatory agents based on mammalian pol inhibition. Moreover, the results suggest that acylation of juglone is an effective chemical modification to improve the anti-cancer and anti-inflammation of vitamin K(3) derivatives, such as juglone.
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Affiliation(s)
- Sayako Maruo
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto 606-8522, Japan
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12
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Schwanke A, Murruzzu C, Zdrazil B, Zuhse R, Natek M, Höltje M, Korting HC, Reissig HU, Höltje HD, Schäfer-Korting M. Antitumor effects of guanosine-analog phosphonates identified by molecular modelling. Int J Pharm 2010; 397:9-18. [DOI: 10.1016/j.ijpharm.2010.06.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 06/18/2010] [Accepted: 06/19/2010] [Indexed: 11/29/2022]
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Kayashima T, Mori M, Mizutani R, Nishio K, Kuramochi K, Tsubaki K, Yoshida H, Mizushina Y, Matsubara K. Synthesis and biological evaluation of vitamin K derivatives as angiogenesis inhibitor. Bioorg Med Chem 2010; 18:6305-9. [PMID: 20688522 DOI: 10.1016/j.bmc.2010.07.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2010] [Revised: 07/08/2010] [Accepted: 07/09/2010] [Indexed: 11/30/2022]
Abstract
Ten vitamin K(3) derivatives were synthesized and screened for anti-angiogenic activity. Results indicated that amine derivatives (1a-d) exerted a stronger inhibition effect on angiogenesis compared to alkyl derivatives (2a-d). In addition to being the most potent inhibitor, 1b also suppressed human umbilical vein endothelial cell tube formation and proliferation. These results suggest that vitamin K(3) amine derivatives with shorter alkyl chains, such as 1b, could be useful for developing anti-angiogenic agents.
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Affiliation(s)
- Tomoko Kayashima
- Department of Human Life Science Education, Graduate School of Education, Hiroshima University, 1-1-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8524, Japan.
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14
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Höltje M, Richartz A, Zdrazil B, Schwanke A, Dugovic B, Murruzzu C, Reißig HU, Korting HC, Kleuser B, Höltje HD, Schäfer-Korting M. Human polymerase α inhibitors for skin tumors. Part 2. Modeling, synthesis and influence on normal and transformed keratinocytes of new thymidine and purine derivatives. J Enzyme Inhib Med Chem 2010; 25:250-65. [DOI: 10.3109/14756360903059579] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Monika Höltje
- Institut für Pharmazeutische und Medizinische Chemie, Heinrich Heine-Universität Düsseldorf, Germany
| | - Anja Richartz
- Institut für Pharmazie (Pharmakologie und Toxikologie) der Freien Universität Berlin, Berlin, Germany
| | - Barbara Zdrazil
- Institut für Pharmazeutische und Medizinische Chemie, Heinrich Heine-Universität Düsseldorf, Germany
| | - Anja Schwanke
- Institut für Pharmazie (Pharmakologie und Toxikologie) der Freien Universität Berlin, Berlin, Germany
| | - Branislav Dugovic
- Institut für Chemie und Biochemie (Organische Chemie) der Freien Universität Berlin, Berlin, Germany
| | - Caterina Murruzzu
- Institut für Chemie und Biochemie (Organische Chemie) der Freien Universität Berlin, Berlin, Germany
| | - Hans-Ulrich Reißig
- Institut für Chemie und Biochemie (Organische Chemie) der Freien Universität Berlin, Berlin, Germany
| | - Hans Christian Korting
- Klinik und Poliklinik für Dermatologie und Allergologie der Ludwig-Maximilians-Universität, München, Germany
| | - Burkhard Kleuser
- Institut für Pharmazie (Pharmakologie und Toxikologie) der Freien Universität Berlin, Berlin, Germany
| | - Hans-Dieter Höltje
- Institut für Pharmazeutische und Medizinische Chemie, Heinrich Heine-Universität Düsseldorf, Germany
| | - Monika Schäfer-Korting
- Institut für Pharmazie (Pharmakologie und Toxikologie) der Freien Universität Berlin, Berlin, Germany
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Gazák R, Purchartová K, Marhol P, Zivná L, Sedmera P, Valentová K, Kato N, Matsumura H, Kaihatsu K, Kren V. Antioxidant and antiviral activities of silybin fatty acid conjugates. Eur J Med Chem 2009; 45:1059-67. [PMID: 20036447 DOI: 10.1016/j.ejmech.2009.11.056] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2009] [Revised: 10/30/2009] [Accepted: 11/27/2009] [Indexed: 11/29/2022]
Abstract
Two selective acylation methods for silybin esterification with long-chain fatty acids were developed, yielding a series of silybin 7-O- and 23-O-acyl-derivatives of varying acyl chain lengths. These compounds were tested for their antioxidant (inhibition of lipid peroxidation and DPPH-scavenging) and anti-influenza virus activities. The acyl chain length is an important prerequisite for both biological activities, as they improved with increasing length of the acyl moiety.
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Affiliation(s)
- Radek Gazák
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídenská 1083, CZ-142 20 Prague, Czech Republic
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Fudouji R, Tanaka T, Taguri T, Matsuo Y, Kouno I. Coupling reactions of catechins with natural aldehydes and allyl alcohols and radical scavenging activities of the triglyceride-soluble products. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:6417-6424. [PMID: 19537756 DOI: 10.1021/jf9010998] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Hydrophobic catechin derivatives were produced by heating with natural aldehydes or allyl alcohols. (+)-Catechin or (-)-epigallocatechin-3-O-gallate was heated with trans-2-hexenal, citral, (+)-citronellal, geraniol, or phytol. Although each reaction generated complex mixtures of products, 11 compounds were isolated and characterized by spectroscopic methods. The unsaturated aldehydes were found to attach to the flavan A-ring. Besides C-C linkage between aldehyde and the C-8 and/or C-6 of the catechin A-ring, formation of ether linkages between unsaturated carbons of the aldehydes and phenolic hydroxyl groups was observed. The allyl alcohols, geraniol and phytols, reacted at the galloyl group as well as the A-ring. After partitioning between triglyceride and water, the lipid layer of the reaction products showed strong 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. In contrast, epigallocatechin-3-O-gallate was not transferred to the lipid layer.
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Affiliation(s)
- Ryusuke Fudouji
- Department of Natural Product Chemistry, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852-8521, Japan
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17
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1,4-Naphthoquinone is a potent inhibitor of human cancer cell growth and angiogenesis. Cancer Lett 2009; 278:34-40. [DOI: 10.1016/j.canlet.2008.12.020] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2008] [Revised: 12/09/2008] [Accepted: 12/10/2008] [Indexed: 12/31/2022]
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18
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Hosseinimehr SJ, Azadbakht M, Abadi AJ. Protective effect of hawthorn extract against genotoxicity induced by cyclophosphamide in mouse bone marrow cells. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2008; 25:51-56. [PMID: 21783835 DOI: 10.1016/j.etap.2007.08.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2006] [Revised: 08/04/2007] [Accepted: 08/27/2007] [Indexed: 05/31/2023]
Abstract
The preventive effect of hawthorn (Crataegus microphylla) fruit extract was investigated in mouse bone marrow cells against genotoxicity induced by cyclophosphamide. Mice were orally (gavages) pretreated with solutions of hawthorn extract which was prepared at five different doses (25, 50, 100, 200 and 400mg/kg b.w.) for seven consecutive days. Mice were injected intraperitoneally on the seventh day with cyclophosphamide (50mg/kg b.w.) and killed after 24h for the evaluation of micronucleated polychromatic erythrocytes (MnPCEs) and the ratio of PCE/(PCE+NCE) (polychromatic erythrocyte/polychromatic erythrocyte+normochromatic erythrocyte). All of five doses of extract significantly reduced MnPCEs induced by cyclophosphamide (P<0.0001). Hawthorn extract at dose 100mg/kg b.w. reduced MnPCEs 2.5 time and also completely normalized PCE/(PCE+NCE) ratio. Hawthorn extract exhibited concentration-dependent antioxidant activity on 1,1-diphenyl-2-picryl hydrazyl free radical. Hawthorn contains high amounts of phenolic compounds; the HPLC analysis showed that it contained chlorogenic acid, epicatechin and hyperoside. It is obvious that hawthorn, particularly flavonoids constituents with antioxidative activity, reduced the oxidative stress and genotoxicity induced by cyclophosphamide in mouse bone marrow cells.
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Affiliation(s)
- Seyed Jalal Hosseinimehr
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
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Li Y, Lin JS, Zhang YH, Wang XY, Chang Y, He XX. Effect and mechanism of β-L-D4A on DNA polymerase α. World J Gastroenterol 2007; 13:6243-8. [PMID: 18069767 PMCID: PMC4171237 DOI: 10.3748/wjg.v13.i46.6243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the safety of β-L-D4A on DNA polymerase α.
METHODS: Ion exchange chromatography was used to separate DNA polymerase α from crude extract of human Hela cells. Detailed kinetic parameters were determined for β-L-D4A against DNA polymerase α.
RESULTS: DNA polymerase α was purified with 4% yield and 31 000 units/mg specific activity. The Michaelis constant (Km = 3.22 μmol/L), 50% inhibition concentration (IC50 = 178.49 μmol/L) and inhibition constant (Ki = 126 μmol/L) of β-L-D4A were determined by kinetic analysis.
CONCLUSION: β-L-D4A is a more safe nucleoside for hepatitis B virus (HBV) infection with a lower host toxicity.
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