1
|
Kayangar M, Ngansop Nono R, Kühlborn J, Tchuenguem R, Ponou BK, Jenett-Siems K, Teponno RB, Dzoyem JP, Opatz T, Melzig MF, Tapondjou LA. A new ursane-type triterpene oxoglucopyranoside from Crossopteryx febrifuga. Z NATURFORSCH C 2019; 74:289-293. [PMID: 31525160 DOI: 10.1515/znc-2019-0113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 08/11/2019] [Indexed: 11/15/2022]
Abstract
A new saponin, 3-O-β-d-3-oxo-glucopyranosyl-ursa-12,20(30)-diene-27,28-dioic acid (1), was isolated from the methanol extract of stem bark of Crossopteryx febrifuga together with the known 3β-d-glucopyranosyl-ursa-12,20(30)-diene-27,28-dioic acid (2), shanzhiside methyl ester (3), shanzhiside (4), β-sitosterol (5), β-sitosterol-3-O-β-d-glucopyranoside (6), ursa-12,20(30)-diene-27,28-dioic acid (7), hederagenin (8), and oleanolic acid (9). The structures were established by comprehensive interpretation of their spectral data 1D- (1H and 13C), 2D-NMR (1H-1H COSY, HMQC, HMBC), spectroscopic, and electrospray ionisation time-of-flight mass spectrometry analysis. The isolated compounds and extracts were screened for their antibacterial properties. Although the EtOAc and n-BuOH extracts exhibited considerable antibacterial activity against Pseudomonas aeruginosa with minimum inhibitory concentration (MIC) value of 32 μg/mL, compounds 2 and 8 showed moderate activity against Enterococcus faecalis with MIC values of 256 and 128 μg/mL, respectively. The new compound (1) exhibited a moderate antibacterial activity against Staphylococcus aureus with an MIC value of 512 μg/mL.
Collapse
Affiliation(s)
- Modjinan Kayangar
- Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Raymond Ngansop Nono
- Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Jonas Kühlborn
- Johannes Gutenberg University Mainz, Institute of Organic Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Roland Tchuenguem
- Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Beaudelaire K Ponou
- Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Rémy B Teponno
- Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Jean P Dzoyem
- Department of Biochemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Till Opatz
- Johannes Gutenberg University Mainz, Institute of Organic Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Matthias F Melzig
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Léon A Tapondjou
- Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon, Phone: +237-675004826
| |
Collapse
|
2
|
Tchegnitegni BT, Teponno RB, Jenett-Siems K, Melzig MF, Miyamoto T, Tapondjou LA. A dihydrochalcone derivative and further steroidal saponins from Sansevieria trifasciata Prain. ACTA ACUST UNITED AC 2018; 72:477-482. [PMID: 28525357 DOI: 10.1515/znc-2017-0027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 04/25/2017] [Indexed: 11/15/2022]
Abstract
Phytochemical investigation of the aerial parts of Sansevieria trifasciata, one of the most common Dracaenaceae plants, has resulted in the isolation of a new dihydrochalcone derivative named trifasciatine C (1), four previously unreported steroidal saponins as two pairs of inseparable regioisomers: trifasciatosides K/L (2/3), M/N (4/5), together with the known 1,2-(dipalmitoyl)-3-O-β-D-galactopyranosylglycerol (6), aconitic acid (7), and 1-methyl aconitic acid (8). Their structures were elucidated mainly by extensive spectroscopic analysis (1D and 2D nuclear magnetic resonance) and high-resolution electronspray ionization-mass spectrometry, as well as chemical methods and comparison of their spectral data with those of related compounds. Compounds 2/3 and 4/5 were evaluated for their antiproliferative activity on Hela cells, and no significant effect was observed.
Collapse
|
3
|
Merdivan S, Jenett-Siems K, Siems K, Niedermeyer TH, Schultze N, Steinborn C, Gründemann C, Lindequist U. Effects of extracts and compounds from Tricholoma populinum Lange on degranulation and IL-2/IL-8 secretion of immune cells. ACTA ACUST UNITED AC 2017; 72:277-283. [DOI: 10.1515/znc-2016-0247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/11/2017] [Indexed: 11/15/2022]
Abstract
Abstract:
Tricholoma populinum Lange is an edible basidiomycete from the family Tricholomataceae. Extracts, fractions, and different metabolites isolated from the fruiting bodies of this mushroom were tested for degranulation-inhibiting activities on RBL-2H3 cells (rat basophils). Dichloromethane extracts decreased degranulation significantly, as did a fraction after column chromatography. In addition, the extract decreased the IL-2 release from Jurkat T cells and the release of IL-8 from HMC-1 human mast cells. The results show the significant effects of extracts of T. populinum on cells of the innate (basophils and mast cells) and adaptive (T cells) immune system and indicate the influence of the mushroom on different immunological processes. As one fraction showed activity, it seems to be possible that it includes an active principle. The compounds responsible for this effect, however, could not be identified as the contents oleic acid (1), ergosterol peroxide (2), and 9,11-dehydroergosterol peroxide (3) showed no effects. Nevertheless, the mushroom could be used for supporting allergy treatment in future studies.
Collapse
Affiliation(s)
- Simon Merdivan
- Institute of Pharmacy, Pharmaceutical Biology, Ernst-Moritz-Arndt University Greifswald , Felix-Hausdorff-Str. 1 , 17487 Greifswald , Germany
| | | | | | - Timo H.J. Niedermeyer
- Interfaculty Institute of Microbiology and Infection Medicine , Eberhard Karls University , Tübingen , Germany
- German Centre for Infection Research (DZIF), Partner Site , Tübingen , Germany
| | - Nadin Schultze
- Institute of Pharmacy , Ernst-Moritz-Arndt University Greifswald , Greifswald , Germany
| | - Carmen Steinborn
- Center for Complementary Medicine, Institute for Environmental Health Sciences and Hospital Infection Control, Faculty of Medicine , University of Freiburg , Freiburg , Germany
| | - Carsten Gründemann
- Center for Complementary Medicine, Institute for Environmental Health Sciences and Hospital Infection Control, Faculty of Medicine , University of Freiburg , Freiburg , Germany
| | - Ulrike Lindequist
- Institute of Pharmacy , Ernst-Moritz-Arndt University Greifswald , Greifswald , Germany
| |
Collapse
|
4
|
Tapondjou LA, Jenett-Siems K, Siems K, Weng A, Melzig MF. Flavonol Glycosides and Cytotoxic Steroidal Saponins from Furcraea tuberosa (Agavaceae). Nat Prod Commun 2017; 12:347-350. [PMID: 30549882] [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: 06/09/2023] Open
Abstract
Phytochemical analysis of the mature fruits of Furcraea tuberosa (Agavaceae) resulted in the isolation of a new bisdesmosidic spirostanol saponin (1), along with eight known steroidal glycosides (2-9), one known phenolic carboxylic acid ester (10) and three known flavonol glycosides (11-13). The structures of these compounds were assigned using a combination of ID and 2D NMR techniques including ¹H, ¹³C, COSY, TOCSY, HSQC and HMBC NMR, and confirmed by mass spectrometry. Thus the new saponin was elucidated as (25R)-6α-(β-D-glucopyranosyloxy)-5α-spirostane-3β-Ο-[(6-Ο-hexadecanoyl)-β-D- glucopyranoside]. The literature survey revealed that most of the steroidal saponins isolated have shown potent cytotoxic effects against various human cancer cell lines and the results are herein reviewed.
Collapse
|
5
|
Tapondjou LA, Jenett-Siems K, Siems K, Weng A, Melzig MF. Flavonol Glycosides and Cytotoxic Steroidal Saponins from Furcraea Tuberosa (Agavaceae). Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200309] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Phytochemical analysis of the mature fruits of Furcraea tuberosa (Agavaceae) resulted in the isolation of a new bisdesmosidic spirostanol saponin (1), along with eight known steroidal glycosides (2–9), one known phenolic carboxylic acid ester (10) and three known flavonol glycosides (11–13). The structures of these compounds were assigned using a combination of 1D and 2D NMR techniques including 1H, 13C, COSY, TOCSY, HSQC and HMBC NMR, and confirmed by mass spectrometry. Thus the new saponin was elucidated as (25 R)–6α-(β-D-glucopyranosyloxy)-5α-spirostane-3β- O-[(6- O-hexadecanoyl)-β-D-glucopyranoside]. The literature survey revealed that most of the steroidal saponins isolated have shown potent cytotoxic effects against various human cancer cell lines and the results are herein reviewed.
Collapse
Affiliation(s)
- Leon A. Tapondjou
- Department of Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Karsten Siems
- AnalytiCon Discovery GmbH, Hermannswerder Haus 17, D-14473 Potsdam, Germany
| | - Alexander Weng
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | - Matthias F. Melzig
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| |
Collapse
|
6
|
Merdivan S, Jenett-Siems K, Siems K, Niedermeyer T, Solis M, Unterseher M, Lindequist U. Inhibition of Degranulation of RBL-2H3 Cells by Extracts and Compounds from Armillaria ostoyae. ACTA ACUST UNITED AC 2017. [DOI: 10.1055/s-0042-121608] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Abstract
Armillaria ostoyae (Romagn.) Herink is an edible honey mushroom from the family Physalacriaceae (Agaricales, Basidiomycota). Dichloromethane extracts of mushroom mycelium and fruiting bodies exhibited a significant degranulation inhibiting effect on RBL-2H3 cells using noncytotoxic concentrations. Bioactivity-guided fractionation of the mycelial dichloromethane extract led to the isolation of sesquiterpen aryl esters. Methyl linoleate could also be isolated. These substances were obtained from A. ostoyae for the first time, with one compound representing an undescribed natural product. Purified compounds melleolide H and J inhibited degranulation significantly. A. ostoyae could be a candidate for support of allergy treatments.
Collapse
Affiliation(s)
- Simon Merdivan
- Institute of Pharmacy, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
| | | | | | - Timo Niedermeyer
- Interfaculty Institute of Microbiology and Infection Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Michael Solis
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
- Department of Natural Sciences, College of Science and Information Technology, Ateneo de Zamboanga University, Zamboanga City, Philippines
| | - Martin Unterseher
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
| | - Ulrike Lindequist
- Institute of Pharmacy, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
| |
Collapse
|
7
|
Bäcker C, Jenett-Siems K, Siems K, Niedermeyer TH, Wurster M, Bodtke A, Lindequist U. Taraxastane-type triterpene saponins isolated from Pittosporum angustifolium Lodd. ACTA ACUST UNITED AC 2015. [DOI: 10.1515/znb-2015-0005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Two new taraxastane-type triterpene saponins, named pittangretosides L (1) and C1 (2), were isolated from the leaves of Pittosporum angustifolium Lodd. Their structures were established by NMR spectroscopic, mass spectrometric and chemical means. The in vitro cytotoxicity was evaluated against four cell lines. The compounds exhibited no cytotoxic activity up to a concentration of 130 μm.
Collapse
Affiliation(s)
- Christian Bäcker
- Institute of Pharmacy, Department of Pharmaceutical Biology, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| | - Kristina Jenett-Siems
- Institute of Pharmacy, Department of Pharmaceutical Biology, Free University of Berlin, Königin-Luise-Str. 2 + 4, 14195 Berlin, Germany
| | - Karsten Siems
- AnalytiCon Discovery GmbH, Hermannswerder Haus 17, 14473 Potsdam, Germany
| | - Timo H.J. Niedermeyer
- Interfaculty Institute of Microbiology and Infection Medicine, Eberhard Karls University Tübingen, Auf der Morgenstelle 28, 72076 Tübingen, Germany
| | - Martina Wurster
- Institute of Pharmacy, Department of Pharmaceutical Biology, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| | - Anja Bodtke
- Institute of Pharmacy, Department of Pharmaceutical/Medicinal Chemistry, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| | - Ulrike Lindequist
- Institute of Pharmacy, Department of Pharmaceutical Biology, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| |
Collapse
|
8
|
Bäcker C, Jenett-Siems K, Siems K, Wurster M, Bodtke A, Niedermeyer THJ, Lindequist U. New Mono- and Bisdesmosidic Triterpene Glycosides from Pittosporum angustifolium Lodd. ACTA ACUST UNITED AC 2015. [DOI: 10.5560/znb.2014-4143] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Fifteen new mono- and bisdesmosidic triterpene saponins, named pittangretosides J, K, M, Q- Z, A1, and B1, along with three known compounds were isolated from the leaves of Pittosporum angustifolium. By spectroscopic, mass spectrometric and chemical evidence, their structures were established as glycosides of A1- and R1-barrigenol, barringtogenol C and camelliagenin A backbones
Collapse
Affiliation(s)
- Christian Bäcker
- Department of Pharmaceutical Biology, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| | - Kristina Jenett-Siems
- Department of Pharmaceutical Biology, Institute of Pharmacy, Free University of Berlin, Königin-Luise-Str. 2 + 4, 14195 Berlin, Germany
| | - Karsten Siems
- AnalytiCon Discovery GmbH, Hermannswerder Haus 17, 14473 Potsdam, Germany
| | - Martina Wurster
- Department of Pharmaceutical Biology, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| | - Anja Bodtke
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| | - Timo H. J. Niedermeyer
- Interfaculty Institute of Microbiology and Infection Medicine, Eberhard Karls University Tübingen, Auf der Morgenstelle 28, 72076 Tübingen, Germany
| | - Ulrike Lindequist
- Department of Pharmaceutical Biology, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, 17489 Greifswald, Germany
| |
Collapse
|
9
|
Naghibi F, Ghafari S, Esmaeili S, Jenett-Siems K. Naghibione; A Novel Sesquiterpenoid with Antiplasmodial Effect from Dorema hyrcanum Koso-Pol. Root, a Plant Used in Traditional Medicine. Iran J Pharm Res 2015; 14:961-8. [PMID: 26330887 PMCID: PMC4518127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Some Dorema species are used in Persian traditional medicine. In the present study the total extract from the roots of Dorema hyrcanum Koso-Pol. was investigated for its in-vitro (pLDH assay) and in-vivo (Peters' 4-days suppressive test) antiplasmodial effects and assessed for cytotoxicity against the normal cell line MDBK (MTT test). The IC50 values for a chloroquine- sensitive (3D7) and a chloroquine- resistant (K1) strain of Plasmodium falciparum were 28.64 and 9.79 µg/mL, respectively. The inhibition percentage of the rodent parasite, Plasmodium berghei, on day 4 in mice was 77.9% and IC50 value on Madin-Darby bovine kidney cells (MDBK cells) was 59.84 µg/mL. The total extract was subjected to a bioassay-guided fractionation protocol based on the in-vivo model which resulted in the isolation of an acetophenon (compound 1), one new sesquiterpenoid; naghibione (compound 2) and two known sesquiterpenoid derivatives (compounds 3, 4). Their structures were elucidated by spectroscopic analysis, including 1D and 2D NMR experiments and ESI-MS. All compounds were evaluated for in-vivo antiplasmodial effect and the results revealed that naghibione showed good suppression activity, inhibiting 68.1 % of the parasite growth.
Collapse
Affiliation(s)
- Farzaneh Naghibi
- Traditional Medicine and Materia Medica Research Center (TMRC), Shahid Beheshti University of Medical Sciences, Tehran. Iran.,School of Pharmacy, Shahid Beheshti University, of Medical Sciences, Tehran. Iran
| | - Saeedeh Ghafari
- Traditional Medicine and Materia Medica Research Center (TMRC), Shahid Beheshti University of Medical Sciences, Tehran. Iran.,Department of Traditional Pharmacy, School of Traditional Medicine, Shahid Beheshti University of Medical Sciences, Tehran. Iran
| | - Somayeh Esmaeili
- Traditional Medicine and Materia Medica Research Center (TMRC), Shahid Beheshti University of Medical Sciences, Tehran. Iran.,Department of Traditional Pharmacy, School of Traditional Medicine, Shahid Beheshti University of Medical Sciences, Tehran. Iran.,Corresponding author:
| | - Kristina Jenett-Siems
- Institut Fuer Pharmazie (Pharmazeutische Biologie), Freie Universitaet Berlin, 14195. Berlin, Germany
| |
Collapse
|
10
|
|
11
|
Krasteva I, Yotova M, Yosifov D, Benbassat N, Jenett-Siems K, Konstantinov S. Cytotoxicity of gypsogenic acid isolated from Gypsophila trichotoma. Pharmacogn Mag 2014; 10:S430-3. [PMID: 24991123 PMCID: PMC4078331 DOI: 10.4103/0973-1296.133299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 01/17/2013] [Accepted: 05/28/2014] [Indexed: 01/11/2023] Open
Abstract
Background: Gypsophila trichotoma Wend. (Caryophyllaceae) is a medicinal plant which is protected in Bulgaria by the Biodiversity Law. Previous studies have showed the presence of triterpene saponins, sterols, flavonoids, triterpens, etc. Objective: Gypsogenic acid, isolated from Gypsophila trichotoma roots, was evaluated for cytotoxic activity. Materials and Methods: The structure of the compound was elucidated by spectral methods. The cell survival fraction was determined by the MTT dye reduction assay, performed with some modifications. Results: Gypsogenic acid was tested in a panel of human tumor cell lines and was found to inhibit the proliferation of malignant cells. It was active against leukemic cells with lymphoid (SKW-3 and BV-173) or myeloid phenotype (HL-60, K-562, and LAMA-84), as well as against the EJ bladder carcinoma cell line. Bcr-Abl expressing myeloid cells (LAMA-84 and especially K-562) displayed lower sensitivity. HL-60/Dox cells were less sensitive to gypsogenic acid than the parent cell line, which shows that gypsogenic acid is probably a substrate of MRP-1.
Collapse
Affiliation(s)
- Ilina Krasteva
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University, Sofia, Bulgaria
| | - Maya Yotova
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University, Sofia, Bulgaria
| | - Deyan Yosifov
- Laboratory for Experimental Chemotherapy, Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University, Sofia, Bulgaria
| | - Niko Benbassat
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University, Sofia, Bulgaria
| | | | - Spiro Konstantinov
- Laboratory for Experimental Chemotherapy, Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University, Sofia, Bulgaria
| |
Collapse
|
12
|
Jenett-Siems K, Krause N, Siems K, Jakupovic S, Wallukat G, Melzig MF. Chemical Composition and Biological Activity of Paris quadrifolia L. ACTA ACUST UNITED AC 2014; 67:565-70. [DOI: 10.1515/znc-2012-11-1206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A study of the components of Paris quadrifolia was undertaken to identify compounds with potential influence on cardiac cells, since previous reports suggested a cardiotoxic risk of this plant. Compounds isolated and identified included one new steroidal saponin, (23S,24S)- spirosta-5,25(27)-diene-1β,3β,21,23,24-pentol-1-O-β-D-apiofuranosyl-(1→3)-α-L-rhamnopyranosyl-( 1→2)-[β-D-xylopyranosyl-(1→3)]-β-D-glucopyranoside 21- O- β- D- apiofuranoside 24-O-β-D-fucopyranoside (1), demonstrating quite unusual structural features, as well as the known compounds 26-O-β-D-glucopyranosyl-(25R)-5-en-furost-3β,17α,22α,26-tetraol- 3- O- α- L- rhamnopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→4)-[α-L-rhamnopyranosyl - -(1→2)]- β- D- glucopyranoside (2), pennogenin 3-O-α-L-rhamnopyranosyl-(1→4)-α-L-rhamno pyranosyl- (1→4)-[α-L-rhamnopyranosyl-(1→ 2)]-β -D- glucopyranoside (3), 7- O- β- D-glucopyranosyl- kaempferol-3- O- β- D-glucopyranosyl-(1→2)-β- D-galactopyranoside (4), kaem pferol- 3-O-β-D-glucopyranosyl-(1→2)-β-D-galactopyranoside (5), 5-hydroxyecdysterone (6), and 20-hydroxyecdysone (7). The pennogenin derivative 3 showed strong cardiotoxic effects in an in vitro cellular model system, whereas the respective furostanol derivative 2 was inactive.
Collapse
Affiliation(s)
- Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2 − 4, D-14195 Berlin, Germany
| | - Nadin Krause
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2 − 4, D-14195 Berlin, Germany
| | - Karsten Siems
- AnalytiCon Discovery GmbH, Hermannswerder Haus 17, D-14473 Potsdam, Germany
| | - Sven Jakupovic
- AnalytiCon Discovery GmbH, Hermannswerder Haus 17, D-14473 Potsdam, Germany
| | - Gerd Wallukat
- Max Delbrück Center for Molecular Medicine, Robert Rössle Str. 10, D-13125 Berlin, Germany
| | - Matthias F. Melzig
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2 − 4, D-14195 Berlin, Germany
| |
Collapse
|
13
|
Ott SC, Tofern-Reblin B, Jenett-Siems K, Siems K, Müller F, Hilker M, Onegi B, Witte L, Eicha E. Unusual Tropane Alkaloid Pattern in Two African Convolvulaceous Species. Phytochemistry and Chemotaxonomy of the Convolvulaceae, Part 20 [1]. Zeitschrift für Naturforschung B 2014. [DOI: 10.1515/znb-2007-0223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
An unusual and complex tropane alkaloid pattern has been detected in the root bark of Astripomoea malvacea and in the whole plant of Falkia repens (Convolvulaceae) by GC-MS analysis. The specific profile of both species is characterized by the presence of aliphatic 3- acyloxytropanes/-nortropanes (exclusively in A. malvacea; predominantly in F. repens in cooccurrence with a few aromatic as well as arylalkyl acyl congeners). The principal alkaloid of A. malvacea, astrimalvine A N-oxide [3β -(3-tigloyloxy-2-methylbutyryloxy)tropane N-oxide], isolated and structurally elucidated by detailed spectroscopic analysis, represents the first N-oxide of a 3β -tropanol derivative in the Convolvulaceae. Its minor tertiary congener astrimalvine B [3β -(3-hydroxy-2-methylbutyryloxy)tropane] turned out to be a metabolite of both convolvulaceaous species. This is the first phytochemical report on the African genera Astripomoea and Falkia.
Collapse
Affiliation(s)
- Sonja C. Ott
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2 – 4, 14195 Berlin, Germany
| | - Britta Tofern-Reblin
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2 - 4, 14195 Berlin, Germany
| | - Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2 - 4, 14195 Berlin, Germany
| | - Karsten Siems
- AnalytiCon Discovery, Hermannswerder Haus 17, 14473 Potsdam, Germany
| | - Frank Müller
- Institut für Biologie (Angewandte Zoologie / Ökologie der Tiere), Freie Universität Berlin, Haderslebener Str. 9, 12163 Berlin, Germany
| | - Monika Hilker
- Institut für Biologie (Angewandte Zoologie / Ökologie der Tiere), Freie Universität Berlin, Haderslebener Str. 9, 12163 Berlin, Germany
| | - Bernardina Onegi
- Department of Pharmacy (Pharmacognosy Unit), Makerere University, Kampala, Uganda
| | - Ludger Witte
- Institut für Pharmazeutische Biologie, Technische Universität Braunschweig, Mendelssohnstraße 1, 38106 Braunschweig, Germany
| | - Eckart Eicha
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2 - 4, 14195 Berlin, Germany
| |
Collapse
|
14
|
Abstract
A novel isoquinolinone alkaloid, iseluxine (1), has been isolated from the epigeal parts of Iseia luxurians (Moric.) O’Donell (Convolvulaceae), a climber indigenous to the tropical Americas. Structural elucidation was achieved by HRM S, 1H NMR, 13C NMR , and HMBC spectroscopy. N- and / or O-m ethyl derivatives of 1 are already known from certain Magnoliidae families, e.g., the Fumariaceae, the Lauraceae, or the Papaveraceae. Iseluxine, the “missing link” in the biosynthesis of these methyl derivatives from dopamine, is the first isoquinolinone alkaloid characterized by a catechol substructure.
Collapse
Affiliation(s)
- Thomas Schimming
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | - Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | - Karsten Siems
- AnalytiCon AG, NL Potsdam, Hermannswerder Haus 17, D-14473 Potsdam , Germany
| | - Ludger Witte
- Institut für Pharmazeutische Biologie, Technische Universität Braunschweig, Germany
| | - Mahabir P. Gupta
- Centro de Investigaciones Farmacógnsticas de la Flora Panameña (CIFLORPAN), Facultad de Farmacia, Universidad de Panamá, Republic of Panama
| | - Eckart Eich
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| |
Collapse
|
15
|
Bäcker C, Jenett-Siems K, Siems K, Wurster M, Bodtke A, Lindequist U. Cytotoxic Saponins from the Seeds of Pittosporum angustifolium. ACTA ACUST UNITED AC 2014; 69:191-8. [DOI: 10.5560/znc.2014-0011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Three new acylated R1-barrigenol triterpene glycosides, 1 - 3, were isolated from the seeds of Pittosporum angustifolium Lodd. together with four known glycosides, 4 - 7, containing R1- and A1-barrigenol backbones. On the basis of spectroscopic, spectrometric, and chemical analyses the novel compounds were named pittangretosides N- P and established as 21ß-acetoxy- 22α-angeloyloxy- (1), 21ß-acetoxy-22α-(2-acetoxy-2-methylbutyroyloxy)- (2), and 21ß-(2-methylbutyroyloxy)- 22α-acetoxy-3ß-[b-D-glucopyranosyl- (1→2)]-[α-L-arabinopyranosyl-(1→3)]-[α- L-arabinofuranosyl-(1!4)]-ß-D-glucuronopyranosyloxyolean-12-ene-15α,16α,28-triol (3). Evaluation of the in vitro cytotoxicity against three tumour cell lines and one non-tumourigenic cell line revealed antiproliferative effects with IC50 values in a range of 1:74 - 34:1 μM
Collapse
Affiliation(s)
- Christian Bäcker
- Department of Pharmaceutical Biology, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, D-17489 Greifswald, Germany. Fax: +49(0)3834864885
| | - Kristina Jenett-Siems
- Department of Pharmaceutical Biology, Institute of Pharmacy, Free University of Berlin, Königin-Luise-Str. 2+4, D-14195 Berlin, Germany
| | - Karsten Siems
- AnalytiCon Discovery GmbH, Hermannswerder Haus 17, D-14473 Potsdam, Germany
| | - Martina Wurster
- Department of Pharmaceutical Biology, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, D-17489 Greifswald, Germany
| | - Anja Bodtke
- Department of Pharmaceutical=Medicinal Chemistry, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, D-17489 Greifswald, Germany
| | - Ulrike Lindequist
- Department of Pharmaceutical Biology, Institute of Pharmacy, Ernst Moritz Arndt University Greifswald, Friedrich-Ludwig-Jahn-Straße 17, D-17489 Greifswald, Germany
| |
Collapse
|
16
|
Tapondjou LA, Jenett-Siems K, Böttger S, Melzig MF. Steroidal saponins from the flowers of Dioscorea bulbifera var. sativa. Phytochemistry 2013; 95:341-350. [PMID: 23969106 DOI: 10.1016/j.phytochem.2013.07.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 05/02/2013] [Revised: 07/18/2013] [Accepted: 07/22/2013] [Indexed: 06/02/2023]
Abstract
Eleven steroidal saponins, dioscoreanosides A-K, along with five known congeners, were isolated from the flowers of Dioscorea bulbifera var. sativa. Their structures were established by extensive NMR experiments in conjunction with mass spectrometry. The isolated compounds were tested for cytotoxicity against urinary bladder carcinoma cells (ECV-304 cells). Our results revealed a moderate activity for spiroconazol A (15), pennogenin 3-O-α-l-rhamnopyranosyl-(1→4)-α-l-rhamnopyranosyl-(1→4)-[α-l-rhamnopyranosyl-(1→2)]-β-d-glucopyranoside (12), and 26-O-ß-d-glucopyranosyl-(25R)-5-en-furost-3ß,17α,22α,26-tetraol-3-O-α-l-rhamnopyranosyl-(1→4)-α-l-rhamnopyranosyl-(1→4)-[α-l-rhamnopyranosyl-(1→2)]-β-d-glucopyranoside (13).
Collapse
Affiliation(s)
- Léon Azefack Tapondjou
- Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon; Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany.
| | | | | | | |
Collapse
|
17
|
Bäcker C, Jenett-Siems K, Siems K, Wurster M, Bodtke A, Chamseddin C, Crüsemann M, Lindequist U. Triterpene glycosides from the leaves of Pittosporum angustifolium. Planta Med 2013; 79:1461-1469. [PMID: 24046217 DOI: 10.1055/s-0033-1350806] [Citation(s) in RCA: 13] [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: 06/02/2023]
Abstract
Phytochemical investigation of the leaves of Pittosporum angustifolium resulted in the isolation and structural elucidation of nine new triterpene saponins, named pittangretosides A-I (1-9), together with a known compound (10). Mainly by NMR and HRESIMS experiments, eight compounds were identified as A1-barrigenol glycosides (1-7, 10), whereas two compounds exhibited an unusual 17,22-seco-backbone of oleanolic acid (8, 9). All compounds were evaluated for their in vitro cytotoxicities against human urinary bladder carcinoma cells (5637). Only compounds with an angeloyl-residue at C-22 of the aglycone (1-4 and 10) showed antiproliferative effects with IC50 values of 4.1, 5.2, 2.1, 17.9, and 2.4 µM, respectively.
Collapse
Affiliation(s)
- Christian Bäcker
- Institute of Pharmacy, Department of Pharmaceutical Biology, Ernst Moritz Arndt University Greifswald, Greifswald, Germany
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Ott SC, Jenett-Siems K, Siems K, Müller F, Hilker M, Eich E. Ipvelutine, 7β-Acetoxy-2α-(tigloyloxy)tropane, an Unusual Tropane Alkaloid from Ipomoea velutina R. Br. (Convolvulaceae). Sci Pharm 2013; 81:543-8. [PMID: 23833719 PMCID: PMC3700081 DOI: 10.3797/scipharm.1303-13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 06/04/2013] [Indexed: 11/22/2022] Open
Abstract
Convolvulaceae provide a rich source of tropane alkaloids, however, 2-substituted tropanes have been described for only few species of this taxon. In this note, 2,7-diesters such as ipvelutine [7β-acetoxy-2α-(tigloyloxy)tropane] isolated from the vegetative parts of the Australian Ipomoea velutina R. BR. are described as a new group of tropane diesters.
Collapse
Affiliation(s)
- Sonja Christina Ott
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | | | | | | | | | | |
Collapse
|
19
|
Abstract
A new sulfated triterpeniod saponin, 3- O-sulfooleanolic acid 28- O-[ β-glucopyranosyl-(1→3)]-[ β-glucopyranosyl-(1→6)]- β-glucopyranosyl ester (1), along with three known Δ7-sterols: stigmast-7-en-3 β-ol (2), stigmast-7-en-3- O-β-D-glucopyranoside (3) and stigmast-7-en-3-on (4) were isolated from the roots of Gypsophila trichotoma Wend. (Caryophyllaceae). Their structures were elucidated by chemical and spectral methods. Compound 1 caused concentration-dependent inhibition of malignant cell proliferation against different human tumor cell lines.
Collapse
Affiliation(s)
- Ilina Krasteva
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University, Sofia 1000, Bulgaria
| | - Maya Yotova
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University, Sofia 1000, Bulgaria
| | - Kristina Jenett-Siems
- Department of Pharmaceutical Biology, Institute of Pharmacy, Free University Berlin, Berlin D-14195, Germany
| | - Petranka Zdraveva
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University, Sofia 1000, Bulgaria
| | - Stefan Nikolov
- Department of Pharmacognosy, Faculty of Pharmacy, Medical University, Sofia 1000, Bulgaria
| |
Collapse
|
20
|
Sadati N, Jenett-Siems K, Siems K, Ardekani MRS, Hadjiakhoondi A, Akbarzadeh T, Ostad SN, Khanavi M. Major constituents and cytotoxic effects of Ajuga chamaecistus ssp. tomentella. ACTA ACUST UNITED AC 2012; 67:275-81. [PMID: 22888532 DOI: 10.1515/znc-2012-5-606] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The n-butanolic fraction of a methanolic extract (80%) from aerial parts of Ajuga chamaecistus ssp. tomentella was analysed using different chromatographic methods. Column (CC) and high-performance liquid chromatography (HPLC) were used for isolation and purification. 13C, H NMR, H-H COSY, HSQC, HMBC, and ESI-MS were employed for identification of the compounds isolated from this fraction. The structures of the compounds were determined to be cis-melilotoside (1), trans-melilotoside (2), lavandulifolioside (3), 20-hydroxyecdysone (4), leonoside B (5), martynoside (6), ajugalactone (7), makisterone A (8), and 24-dehydroprecyasterone (9). This is the first report on the presence of cis- and trans-melilotoside in Ajuga species. Cytotoxic evaluation of the n-butanolic fraction, cis- and trans-melilotoside against cancer (T47D, HT-29, and Caco-2) and normal (NIH 3T3) cell lines by the mitochondrial tetrazolium test (MTT) showed no cytotoxic effects up to 400 microg/mL. The results of this study suggest that melilotoside, phenylethyl glycosides, and phytoecdysteroids are the main constituents of the n-butanolic fraction of Ajuga chamaecistus ssp. tomentella.
Collapse
Affiliation(s)
- Nargess Sadati
- Department of Pharmacognosy and Medicinal Plants Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 14155-6451, Iran
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Weng A, Thakur M, Beceren-Braun F, Bachran D, Bachran C, Riese SB, Jenett-Siems K, Gilabert-Oriol R, Melzig MF, Fuchs H. The toxin component of targeted anti-tumor toxins determines their efficacy increase by saponins. Mol Oncol 2012; 6:323-32. [PMID: 22309811 DOI: 10.1016/j.molonc.2012.01.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 01/11/2012] [Accepted: 01/12/2012] [Indexed: 11/16/2022] Open
Abstract
Tumor-targeting protein toxins are composed of a toxic enzyme coupled to a specific cell binding domain that targets cancer-associated antigens. The anti-tumor treatment by targeted toxins is accompanied by dose-limiting side effects. The future prospects of targeted toxins for therapeutic use in humans will be determined by reduce side effects. Certain plant secondary metabolites (saponins) were shown to increase the efficacy of a particular epidermal growth factor receptor (EGFR)-targeted toxin, paralleled by a tremendous decrease of side effects. This study was conducted in order to investigate the effects of substituting different toxin moieties fused to an EGF ligand binding domain on the augmentative ability of saponins for each against therapeutic potential of the saponin-mediated efficacy increase for different anti-tumor toxins targeting the EGFR. We designed several EGFR-targeted toxins varying in the toxic moiety. Each targeted toxin was used in combination with a purified saponin (SA1641), isolated from the ornamental plant Gypsophila paniculata L. SA1641 was characterized and the SA1641-mediated efficacy increase was investigated on EGFR-transfected NIH-3T3 cells. We observed a high dependency of the SA1641-mediated efficacy increase on the nature of toxin used for the construction of the targeted toxin, indicating high specificity. Structural alignments revealed a high homology between saporin and dianthin-30, the two toxic moieties that benefit most from the combination with SA1641. We further demonstrate that SA1641 did not influence the plasma membrane permeability, indicating an intracellular interaction of SA1641 and the toxin components of targeted toxins. Surface plasmon resonance measurements point to a transient binding of SA1641 to the toxin components of targeted toxins.
Collapse
Affiliation(s)
- Alexander Weng
- Institut für Laboratoriumsmedizin, Klinische Chemie und Pathobiochemie, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, D-12200 Berlin, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Jenett-Siems K, Krause N, Siems K, Jakupovic S, Wallukat G, Melzig MF. Chemical Composition and Biological Activity of Paris quadrifolia L. Z NATURFORSCH C 2012. [DOI: 10.5560/znc.2012.67c0565] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
23
|
Sadati N, Jenett-Siems K, Siems K, Ardekani MRS, Hadjiakhoondi A, Akbarzadeh T, Ostad SN, Khanavi M. Major Constituents and Cytotoxic Effects of Ajuga chamaecistus ssp. tomentella. Z NATURFORSCH C 2012. [DOI: 10.5560/znc.2012.67c0275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
24
|
Abstract
Phytochemical investigation of the chloroform extract of BRYONIA ASPERA roots resulted in the isolation and structure elucidation of two new cucurbitacins (1, 2) together with eight known cucurbitane derivatives (6-13), the pentacyclic triterpene bryonolic acid (5) and two hydroxybenzoic acid amides (3, 4). Their structures were elucidated by spectroscopic analysis, including 2D NMR techniques.
Collapse
Affiliation(s)
- Shamim Sahranavard
- Pharmacognosy Department, School of Pharmacy, Shaheed Beheshti University of Medical Sciences, Tehran, Iran.
| | | | | | | |
Collapse
|
25
|
Jenett-Siems K, Koehler I, Kraft C, Beyer G, Melzig MF, Eich E. ChemInform Abstract: Cytotoxic Constituents from Exostema mexicanum and Artemisia afra, Two Traditionally Used Plant Remedies. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/chin.200236179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
26
|
Abstract
The phytochemical analysis of a butanolic fraction of Acmella ciliata Kunth. afforded a total of 15 hydrophilic compounds. Seven flavonol 3-O-glycosides were isolated, including two new natural products, quercetin-3-O-(3-O-acetyl-beta-D-glucuronopyranoside) and quercetin-3-O-(2- O-acetyl-alpha-L-rhamnopyranosyl-(1--> 6)-beta-D-glucopyranoside). Furthermore, a variety of caffeoylquinic acid derivatives could be identified using ESI-MS and NMR-spectroscopy.
Collapse
Affiliation(s)
- Juliane Kasper
- Institute of Pharmacy, Department of Pharmaceutical Biology, Free University, Berlin, Germany
| | | | | |
Collapse
|
27
|
Weng A, Jenett-Siems K, Schmieder P, Bachran D, Bachran C, Görick C, Thakur M, Fuchs H, Melzig MF. A convenient method for saponin isolation in tumour therapy. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:713-8. [DOI: 10.1016/j.jchromb.2010.01.026] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2009] [Revised: 01/19/2010] [Accepted: 01/19/2010] [Indexed: 11/30/2022]
|
28
|
Weng A, Jenett-Siems K, Görick C, Melzig MF. Enhancement of cytotoxicity of ribosome-inactivating-protein type I by saponinum album is not based on stimulation of phagocytosis. J Pharm Pharmacol 2010; 60:925-30. [DOI: 10.1211/jpp.60.7.0015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Saponinum album, a mixture of triterpenoic saponins derived from Gypsophila species, led to an increased internalization of agrostin, a ribosome-inactivating-protein (RIP) type I in U-937 cells differentiated with interferon-γ or phorbol myristate acetate. Treatment with agrostin only showed no cytotoxicity. It was hypothesized that saponinum album stimulated phagocytosis and by that the uptake of agrostin. For this purpose phagocytosis experiments with Alexa-Fluor-488-labelled 1-μm amino-latex beads and FITC-labelled Escherichia coli (K-12 strain) were performed. The results indicated no stimulation of phagocytosis by treatment with saponinum album.
Collapse
Affiliation(s)
- A Weng
- Institute of Pharmacy, Free University Berlin, Königin-Luise-Str. 2 + 4, D-14195 Berlin, Germany
| | - K Jenett-Siems
- Institute of Pharmacy, Free University Berlin, Königin-Luise-Str. 2 + 4, D-14195 Berlin, Germany
| | - C Görick
- Institute of Pharmacy, Free University Berlin, Königin-Luise-Str. 2 + 4, D-14195 Berlin, Germany
| | - M F Melzig
- Institute of Pharmacy, Free University Berlin, Königin-Luise-Str. 2 + 4, D-14195 Berlin, Germany
| |
Collapse
|
29
|
Lu Y, Wang Q, Melzig MF, Jenett-Siems K. Extracts of Cynomorium songaricum protect human neuroblastoma cells from beta-amyloid25-35 and superoxide anion induced injury. Pharmazie 2009; 64:609-612. [PMID: 19827306] [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: 05/28/2023]
Abstract
In Traditional Chinese Medicine a number of herbs are used to alleviate age-related diseases including memory impairment and dementia, among them stems of Cynomorium songaricum, Cynomoriaceae. In this study, we evaluated the protective effect of different extracts of aerial parts of C. songaricum on amyloid-beta peptide (Abeta) and hypoxanthine/xanthine oxidase induced cell death in SK-N-SH neuroblastoma cells. Abeta (20 microM) as well as superoxide anions generated by the hypoxanthine/xanthine oxidase system both reduced cell viability to about 60%. The methanolic extract of C. songaricum attenuated Abeta induced cell death at concentrations of 100 and 10 microg/ml, an even stronger effect was observed for the ethyl acetate fraction obtained from the crude methanolic extract. On the other hand, the dichloromethane as well as water fractions showed no protective effects. In order to further analyze the protective mode of action, the ability of extracts to protect against superoxide anions induced cell death was also evaluated. In this system, cell viability could again be restored by methanol and ethyl acetate extracts, the latter showingsignificant protective effects even at concentrations as low as 0.1 microg/ml.
Collapse
Affiliation(s)
- Y Lu
- Beijing University of Chinese Medicine, Beijing, P.R. China
| | | | | | | |
Collapse
|
30
|
Lu Y, Wang Q, Melzig MF, Jenett-Siems K. Extracts of Cynomorium songaricum protect SK-N-SH human neuroblastoma cells against staurosporine-induced apoptosis potentially through their radical scavenging activity. Phytother Res 2009; 23:257-61. [PMID: 18844290 DOI: 10.1002/ptr.2605] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In traditional Chinese medicine a number of herbs are used to alleviate the symptoms of aging, among them the stems of Cynomorium songaricum, Cynomoriaceae. This study evaluated the protective effect of different extracts of C. songaricum on staurosporine-induced apoptotic cell death in SK-N-SH neuroblastoma cells. Staurosporine (100 nm) reduced cell viability to about 55%. The ethyl acetate fraction of C. songaricum significantly attenuated staurosporine-induced cell death at concentrations of 100 and 10 microg/mL. On the other hand, the dichloromethane as well as water fractions showed no protective effects. In order to further analyse the protective mode of action, the superoxide anion scavenging activity of two extracts was evaluated in a xanthine/xanthine oxidase system. In this system, the EtOAc extract showed a good scavenging activity (IC(50) value 2.9 microg/mL) without inhibition of xanthine oxidase. In conclusion, the results prove the neuroprotective activity of C. songaricum extracts in vitro, thus supporting its traditional use.
Collapse
Affiliation(s)
- Yi Lu
- Beijing University of Chinese Medicine, 100029, Beijing, China
| | | | | | | |
Collapse
|
31
|
Froelich S, Gupta MP, Siems K, Jenett-Siems K. Phenylethanoid glycosides from Stachytarpheta cayennensis (Rich.) Vahl, Verbenaceae, a traditional antimalarial medicinal plant. Rev bras farmacogn 2008. [DOI: 10.1590/s0102-695x2008000400003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
32
|
Froelich S, Onegi B, Kakooko A, Siems K, Schubert C, Jenett-Siems K. Plants traditionally used against malaria: phytochemical and pharmacological investigation of Momordica foetida. Rev bras farmacogn 2007. [DOI: 10.1590/s0102-695x2007000100002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
33
|
Ott SC, Jenett-Siems K, Pertz HH, Siems K, Witte L, Eich E. Bonabiline A, a monoterpenoid 3alpha-acyloxytropane from the roots of Bonamia spectabilis showing M3 receptor antagonist activity. Planta Med 2006; 72:1403-6. [PMID: 17089324 DOI: 10.1055/s-2006-951728] [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] [Indexed: 05/12/2023]
Abstract
Two 3alpha-acyloxytropanes with unique monoterpenoic acyl moieties, bonabiline A and its anhydro derivative bonabiline B, have been isolated from the roots of Bonamia spectabilis. Their structures were elucidated by detailed spectroscopic analysis. Due to the structural similarity of bonabiline A to atropine/hyoscyamine, the affinity of both bonabilines to the muscarinic M (3) receptor was studied in the isolated guinea-pig ileum. Bonabiline A (pA (2) 6.65 +/- 0.03) proved to be a more potent antagonist than bonabiline B (pA (2) 5.50 +/- 0.03).
Collapse
Affiliation(s)
- Sonja C Ott
- Institut für Pharmazie, Pharmazeutische Biologie, Freie Universität Berlin, Berlin, Germany
| | | | | | | | | | | |
Collapse
|
34
|
Froelich S, Siems K, Hernández MA, Ibarra RA, Berendsohn WG, Jenett-Siems K. Phenolic glycosides from Exostema mexicanum leaves. Pharmazie 2006; 61:641-4. [PMID: 16889074] [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: 05/11/2023]
Abstract
Phytochemical investigation of the leaves of Exostema mexicanum led to the isolation of two novel acylated flavonol glycosides 6, 7 and three glycosides 1-4 structurally belonging to the group of 4-phenylcoumarins. One of them, 5-O-beta-D-glucopyranosyl-4'-hydroxy-7-methoxy-4-phenylcoumarin (2), turned out to be new. Furthermore, the 4-phenylcoumarin aglycone 3'-hydroxy-4',5,7-trimethoxy-4-phenylcoumarin (5) was obtained. The in vitro cytotoxicity of 3-5 against the cell line ECV-304 was evaluated; the aglycone 5 was highly cytotoxic, whereas the glycosidic compounds 3 and 4 were inactive.
Collapse
Affiliation(s)
- S Froelich
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Germany
| | | | | | | | | | | |
Collapse
|
35
|
Schimming T, Jenett-Siems K, Siems K, Witte L, Eich E. N1,N10-ditigloylspermidine, a novel alkaloid from the seeds of Ipomoea nil. Pharmazie 2005; 60:958-9. [PMID: 16398277] [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: 05/06/2023]
Abstract
A novel spermidine alkaloid, N1,N10-ditigloylspermidine (1), has been isolated from the seeds of Ipomoea nil (L.) Roth (Convolvulaceae). Structural elucidation was achieved by EIMS, HRMS, 1H NMR, and 13C NMR spectroscopy.
Collapse
Affiliation(s)
- T Schimming
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | | | | | | | | |
Collapse
|
36
|
Abstract
Three new 4-hydroxy-benzoic acid derivatives, 4-methoxy-3,5-bis-(3-hydroxy-3-methyl-1-butenyl)benzoate, 3-hydroxy-2-(1-hydroxy-1-methylethyl)-2,3-dihydrobenzofuran-5-carboxylic acid, and 3-hydroxy-2-(1-hydroxy-1-methylethyl)-2,3-dihydrobenzofuran-5-carboxylic acid methyl ester together with eight known compounds, have been isolated from the stems of Piper hispidum. Their structures were elucidated by a detailed spectroscopic analysis. In addition, the cytotoxicity of seven isolated compounds has been evaluated, revealing a moderate activity for three derivatives of dillapiole.
Collapse
Affiliation(s)
- U Friedrich
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin
| | | | | | | | | |
Collapse
|
37
|
Al-Fatimi M, Friedrich U, Jenett-Siems K. Cytotoxicity of plants used in traditional medicine in Yemen. Fitoterapia 2005; 76:355-8. [PMID: 15890471 DOI: 10.1016/j.fitote.2005.02.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [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: 11/09/2004] [Revised: 02/28/2005] [Accepted: 02/28/2005] [Indexed: 10/25/2022]
Abstract
Twenty-five extracts obtained from 14 plant species used in the traditional medicine in Yemen have been screened for cytotoxic activity against human ECV-304 cells. Extracts of Dracaena cinnabari, Eucalyptus camaldulensis, Euclea divinorum, Euphorbia cactus, Pulicaria crispa, and Withania somnifera displayed a remarkable activity.
Collapse
Affiliation(s)
- M Al-Fatimi
- Department of Pharmacognosy, Faculty of Medicine and Health Sciences, Aden University, P.O. Box 5411-Maalla, Aden, Yemen
| | | | | |
Collapse
|
38
|
Jenett-Siems K, Weigl R, Böhm A, Mann P, Tofern-Reblin B, Ott SC, Ghomian A, Kaloga M, Siems K, Witte L, Hilker M, Müller F, Eich E. Chemotaxonomy of the pantropical genus Merremia (Convolvulaceae) based on the distribution of tropane alkaloids. Phytochemistry 2005; 66:1448-64. [PMID: 15922373 DOI: 10.1016/j.phytochem.2005.04.027] [Citation(s) in RCA: 20] [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] [Received: 02/11/2005] [Revised: 04/12/2005] [Accepted: 04/12/2005] [Indexed: 05/02/2023]
Abstract
The occurrence and distribution of tropane and biogenetically related pyrrolidine alkaloids in 18 Merremia species of paleo-, neo-, and pantropical occurrence have been studied. The extensive GC-MS study included members of almost all sections of the genus and has been carried out with epigeal vegetative parts as well as with roots. It comprises altogether 74 tropanes and 13 pyrrolidines including nicotine. Along with datumetine known already from a solanaceous species, the study led to the isolation (from M. dissecta and M. guerichii, respectively) and structure elucidation (spectral data) of four novel 3alpha-acyloxytropanes, merresectines A-D: 3alpha-(4-methoxybenzoyloxy)nortropane (A), 3alpha-kurameroyloxytropane (B), 3alpha-nervogenoyloxytropane (C), 3alpha-[4-(beta-D-glucopyranosyloxy)-3-methoxy-5-(3-methyl-2-butenyl)benzoyloxy]tropane (beta-d-glucoside of D). Moreover, the novel 3alpha,6beta-di-(4-methoxybenzoyloxy)tropane (merredissine) has been isolated from M. dissecta and structurally elucidated. In addition the structures of datumetine and merresectine A could be confirmed by synthesis. Spectral data for two known 3alpha-acyloxytropanes (merresectine E beta-D-glucoside, 4'-dihydroconsabatine) and one known 3beta-acyloxytropane (concneorine) are documented for the first time. The structures of three further merresectines (F-H) have been determined by mass spectrometry. Furthermore, the linkage (2',3- and 2',4-, respectively) of two position isomer N-methylpyrrolidinylhygrines was proven by synthesis. The results of the study contribute to the solution of infrageneric taxonomic problems. Whereas all species yield pyrrolidine alkaloids without suitably differentiating results the diverging occurrence of tropane alkaloids leads to three groups of sections: (1) taxa free of tropanes, (2) taxa with simple tropanes, and (3) taxa with merresectines in addition to simple tropanes.
Collapse
Affiliation(s)
- Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2+4, D-14195 Berlin, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Frölich S, Schubert C, Bienzle U, Jenett-Siems K. In vitro antiplasmodial activity of prenylated chalcone derivatives of hops (Humulus lupulus) and their interaction with haemin. J Antimicrob Chemother 2005; 55:883-7. [PMID: 15824094 DOI: 10.1093/jac/dki099] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [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: 11/14/2022] Open
Abstract
OBJECTIVES There is an urgent need to discover new antimalarials, due to the spread of chloroquine resistance and the limited number of available drugs. Chalcones are one of the classes of natural products that are known to possess antiplasmodial properties. Therefore, the in vitro antiplasmodial activity of the main hop chalcone xanthohumol and seven derivatives was evaluated. In addition, the influence of the compounds on glutathione (GSH)-dependent haemin degradation was analysed to determine its contribution to the antimalarial effect of chalcones. METHODS In vitro antiplasmodial activity was evaluated against the chloroquine-sensitive strain poW and the multiresistant clone Dd2 using a [(3)H]hypoxanthine-incorporation assay. Inhibition of GSH-dependent haemin degradation was analysed by a multiwell plate assay at 11 microM. RESULTS Of the eight compounds tested, four possessed activity with IC(50) values<25 microM against at least one of the two strains of Plasmodium falciparum. The main hop chalcone, xanthohumol, was most active with IC(50) values of 8.2+/-0.3 (poW) and 24.0 +/- 0.8 microM (Dd2). Three of these compounds were additionally active in the haemin-degradation assay. CONCLUSIONS The results demonstrate for the first time the ability of chalcone derivatives to interfere with the haemin-degradation process of P. falciparum. This effect might contribute to their antiplasmodial activity. Nevertheless, as one compound showed inhibition of P. falciparum without being able to interact with GSH-dependent haemin degradation, other modes of action must add to the observed antiparasitic activity of hop chalcones.
Collapse
Affiliation(s)
- Sonja Frölich
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | | | | | | |
Collapse
|
40
|
Schimming T, Jenett-Siems K, Mann P, Tofern-Reblin B, Milson J, Johnson RW, Deroin T, Austin DF, Eich E. Calystegines as chemotaxonomic markers in the Convolvulaceae. Phytochemistry 2005; 66:469-480. [PMID: 15694454 DOI: 10.1016/j.phytochem.2004.12.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Revised: 12/20/2004] [Accepted: 12/20/2004] [Indexed: 05/24/2023]
Abstract
An extended GC-MS study of 129 convolvulaceous species belonging to 29 genera (all 12 tribes) including the results of a previous survey (65 spp.) revealed the occurrence of one to six polyhydroxy alkaloids of the nortropane type (calystegines) in 62 species belonging to 22 genera of all tribes except the unique parasitic Cuscuteae. The large genus Ipomoea turned out to comprise calystegine-positive species in at least eight out of ten sections checked. The number of the calystegines used as reference compounds has been increased from seven (previous survey) to 11 (present study). Furthermore, the results concerning these additional four alkaloids could also be completed for all species of the previous survey. The plant material (epigeal vegetative parts and/or roots, flowers, fruits/seeds) was obtained from collections in the wild from a wide range of tropical, subtropical, and temperate locations of all continents as well as from cultivation in the greenhouse. All plant organs turned out to be potential locations for the occurrence of these metabolites though they are detectable often only in certain organs of a given species. Three genera (Cuscuta, Operculina, Polymeria) might have lost the ability to synthesize these plesiomorphic characters in the course of the evolution since the examination of several different organs and/or provenances of five species each failed to show calystegines as constituents. Nevertheless, the present data clearly demonstrate that the occurrence of calystegines is an almost consistent trait in the Convolvulaceae in principle, from basal to most advanced tribes.
Collapse
Affiliation(s)
- Thomas Schimming
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Strasse 2-4, D-14195 Berlin, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Jenett-Siems K, Ott SC, Schimming T, Siems K, Müller F, Hilker M, Witte L, Hartmann T, Austin DF, Eich E. Ipangulines and minalobines, chemotaxonomic markers of the infrageneric Ipomoea taxon subgenus Quamoclit, section Mina. Phytochemistry 2005; 66:223-231. [PMID: 15652579 DOI: 10.1016/j.phytochem.2004.11.019] [Citation(s) in RCA: 8] [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: 07/26/2004] [Revised: 11/22/2004] [Indexed: 05/24/2023]
Abstract
A comprehensive GC-MS analysis of 8 Ipomoea species belonging to the subgenus Quamoclit, section Mina revealed that the members of this taxon form combinations of two necine bases with rare necic acids resulting in unique pyrrolizidine alkaloids. The occurrence and diversity of these metabolites show remarkable variations: Some species, especially Ipomoea hederifolia and Ipomoea lobata, are able to synthesize a large number of alkaloids whereas others, especially Ipomoea coccinea and Ipomoea quamoclit, are poor synthesizers with only a few compounds. However, these metabolites are apparently chemotaxonomic markers of this infrageneric taxon in general. They represent either esters of (-)-platynecine (altogether 48 ipangulines and 4 further esters including results of a previous study) or esters of (-)-trachelanthamidine, an additional novel structural type called minalobines (altogether 21 alkaloids). Both types are characterized by section-specific rare necic acids, e.g., ipangulinic/isoipangulinic acid, phenylacetic acid. The alkaloids of Ipomoea cholulensis, I. coccinea, I. hederifolia, Ipomoea neei, and Ipomoea quamoclit were mono and diesters of platynecine. Minalobines turned out to be metabolites of I. lobata (Cerv.) Thell. (syn.: Mina lobata Cerv.) lacking ipangulines. The major alkaloid of this species, minalobine R, has been isolated and identified as 9-O-(threo-2-hydroxy-2-methyl-3-phenylacetoxy-butyryl)-(-)-trachelanthamidine on the basis of spectral data. Apparently only two of the species included in this study, Ipomoea cristulata and Ipomoea sloteri, are able to synthesize both, ipangulines as well as minalobines. Minalobine O could be isolated as a major alkaloid of I. cristulata, its structure has been established as 9-O-(erythro-2-hydroxy-2-methyl-3-tigloyloxy-butyryl)-(-)-trachelanthamidine on the basis of spectral data.
Collapse
Affiliation(s)
- Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Strasse 2+4, D-l4195 Berlin, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Jenett-Siems K, Köhler I, Kraft C, Pertz HH, Kren V, Fiserová A, Kuzma M, Ulrichová J, Bienzle U, Eich E. In vitro antiplasmodial activities of semisynthetic N,N′-spacer-linked oligomeric ergolines. Bioorg Med Chem 2004; 12:817-24. [PMID: 14759742 DOI: 10.1016/j.bmc.2003.10.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2003] [Revised: 10/08/2003] [Accepted: 10/17/2003] [Indexed: 11/19/2022]
Abstract
Starting from three monomeric ergolines (terguride 1, festuclavine 2, pergolide 3) N,N'-spacer-linked oligomeric derivatives were prepared using different aliphatic or arylalkyl spacers. The compounds have been evaluated for their in vitro antiplasmodial activity against the chloroquine-sensitive strain poW and the chloroquine-resistant clone Dd2 of Plasmodium falciparum. Additionally, the cytotoxic effects against mouse fibroblasts (NIH 3T3) in vitro, and human hepatocytes were evaluated. All monomers displayed only a weak antiplasmodial effect, but N-1,N-1'-spacer-linked dimerization substantially enhanced their antiplasmodial activity. The best activities were observed for compounds showing a distance of six carbon atoms between two monomers, which can be obtained by aliphatic or p-xylene linkers. The N-6,N-6'-spacer-linked depropylpergolide dimer 3i exhibited the highest antiplasmodial activity of all compounds tested (IC(50) values: 0.14 and 0.13 microM against poW and Dd2, respectively). Unfortunately, it displayed toxic effects against the mouse fibroblast cell line NIH 3T3 (IC(50): 0.1+/-0.09 microM) and also against human hepatocytes at 100 microM (LDH-leakage: 15.58+/-0.87 microkat/L; GSH-level: 8.15+/-0.78 nmol/10(6) cells). However, the N-1,N-1'-spacer-linked trimer of festuclavine (2f), and also the N-1,N-1'-spacer-linked tetramer of terguride (1g) possessed remarkable antiplasmodial activities (IC(50): 0.54 and 1.53 microM, respectively, against Dd2) lacking cytotoxicity.
Collapse
Affiliation(s)
- Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Jenett-Siems K, Köhler I, Kraft C, Siems K, Solis PN, Gupta MP, Bienzle U. Cornutins C-L, neo-clerodane-type diterpenoids from Cornutia grandifolia var. intermedia. Phytochemistry 2003; 64:797-804. [PMID: 13679104 DOI: 10.1016/s0031-9422(03)00352-2] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Ten novel neo-clerodane diterpenoids, named cornutins C-L, have been isolated from the leaves of Cornutia grandifolia var. intermedia. Their structures have been elucidated by detailed spectroscopic analysis. In addition, the in vitro antiplasmodial activity of four isolated compounds (cornutin C-F) has been evaluated, revealing only a marginal activity.
Collapse
Affiliation(s)
- Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195, Berlin, Germany.
| | | | | | | | | | | | | |
Collapse
|
44
|
Jenett-Siems K, Kraft C, Siems K, Jakupovic J, Solis PN, Gupta MP, Bienzle U. Sipaucins A-C, sesquiterpenoids from Siparuna pauciflora. Phytochemistry 2003; 63:377-381. [PMID: 12770583 DOI: 10.1016/s0031-9422(03)00098-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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
The phytochemical investigation of the leaves of Siparuna pauciflora yielded three novel sesquiterpenoids: the germacrane sipaucin A, the elemane sipaucin B and sipaucin C, comprising a new type of carbon skeleton. In addition, four known aporphine alkaloids-nor-boldine, boldine, laurotetanine, and N-methyl-laurotetanine-were obtained. The evaluation of the antiplasmodial activity of the isolated compounds against two strains of Plasmodium falciparum (PoW, Dd2) showed a moderate activity of nor-boldine.
Collapse
Affiliation(s)
- Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany.
| | | | | | | | | | | | | |
Collapse
|
45
|
Jenett-Siems K, Weigl R, Kaloga M, Schulz J, Eich E. Ipobscurines C and D: macrolactam-type indole alkaloids from the seeds of Ipomoea obscura. Phytochemistry 2003; 62:1257-1263. [PMID: 12648548 DOI: 10.1016/s0031-9422(02)00756-2] [Citation(s) in RCA: 17] [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
Separation of the methanolic seed extract of Ipomoea obscura afforded five indole alkaloids, three of them (ipobscurines B-D) being new natural products of a unique structural type characterized as serotonin hydroxycinnamic acid amide-type conjugates with a second phenylpropanoid moiety forming an ether with the 5-OH position of the indole nucleus. Due to an oxidative phenolic coupling between the two phenylpropanoid moieties of the supposed precursor ipobscurine B two 21-membered macrolactams with a phenol ether partial structure are formed: the trans-cis isomers ipobscurines C and D. Their structures were established on the basis of spectral data. Moreover, total synthesis of the racemic erythro- and threo-ipobscurine B 4',4"-dimethyl ethers and the comparison with the corresponding derivative of natural (-)-ipobscurine B proved an erythro configuration of the latter.
Collapse
Affiliation(s)
- Kristina Jenett-Siems
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str 2-4, D-14195 Berlin, Germany
| | | | | | | | | |
Collapse
|
46
|
Kraft C, Jenett-Siems K, Siems K, Jakupovic J, Mavi S, Bienzle U, Eich E. In vitro antiplasmodial evaluation of medicinal plants from Zimbabwe. Phytother Res 2003; 17:123-8. [PMID: 12601673 DOI: 10.1002/ptr.1066] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.4] [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: 11/11/2022]
Abstract
In this study the in vitro antiplasmodial activities of extracts from Cussonia spicata (Araliaceae), Artemisia afra, Vernonia colorata, V. natalensis (Asteraceae), Parinari curatellifolia (Chrysobalanaceae), Clutia hirsuta, Flueggea virosa, (Euphorbiaceae), Adenia gummifera (Passifloraceae) and Hymenodictyon floribundum, (Rubiaceae) were evaluated. The lipophilic extracts from the aerial parts of Artemisia afra and Vernonia colorata proved to be the most active against the chloroquine-sensitive strain PoW and against the chloroquine-resistant clone Dd2 of Plasmodium falciparum. Bioassay-guided fractionation of the extract of A. afra yielded seven flavonoids, from which acacetin, genkwanin and 7-methoxyacacetin showed in vitro activity; the IC(50) values ranged from 4.3 microgram/mL to 12.6 microgram/mL. In addition, several sesquiterpene lactones could be obtained from the most active fractions. Whereas eudesmaafraglaucolide proved to be inactive, the guaianolides 1-desoxy-1alpha-peroxy-rupicolin A-8-O-acetate, 1alpha,4alpha-dihydroxybishopsolicepolide and rupicolin A-8-O-acetate revealed in vitro antiplasmodial activity. Evaluation of V. colorata gained four sesquiterpenes 11beta,13-dihydrovernodalin, vernodalol, 11beta,13-dihydrovernolide and 11beta,13,17,18-tetrahydrovernolide, from which the first two constituents exhibited the strongest antiplasmodial activity (IC(50) values: 1.1-4.8 microgram/mL).
Collapse
Affiliation(s)
- Carola Kraft
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | | | | | | | | | | | | |
Collapse
|
47
|
Köhler I, Jenett-Siems K, Kraft C, Siems K, Abbiw D, Bienzle U, Eich E. Herbal remedies traditionally used against malaria in Ghana: bioassay-guided fractionation of Microglossa pyrifolia (Asteraceae). Z NATURFORSCH C 2002; 57:1022-7. [PMID: 12562088 DOI: 10.1515/znc-2002-11-1212] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [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: 11/15/2022]
Abstract
Different extracts from 11 West African plants traditionally used against malaria in Ghana were tested against both the chloroquine-sensitive strain PoW and the chloroquine-resistant clone Dd2 of Plasmodium falciparum. Due to the promising in vitro activity of the lipophilic extract [IC50: 10.5 microg/ml (PoW); 13.1 microg/ml (Dd2)], Microglossa pyrifolia (Lam.) Kuntze (Asteraceae) was chosen for further phytochemical investigation. From active fractions 13 compounds were isolated; their structures were established on the basis of spectroscopic methods. 1-Acetyl-6E-geranylgeraniol-19-oic acid and sinapyl diangelate represent new natural compounds. The two diterpenes E-phytol [IC50: 8.5 microM (PoW); 11.5 microM (Dd2)], and 6E-geranylgeraniol-19-oic acid [IC50: 12.9 microM (PoW); 15.6 microM (Dd2)] proved to be the most active constituents in our test system.
Collapse
Affiliation(s)
- Inga Köhler
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Strasse 2+4, D-14195 Berlin, Germany
| | | | | | | | | | | | | |
Collapse
|
48
|
Kraft C, Jenett-Siems K, Köhler I, Siems K, Abbiw D, Bienzle U, Eich E. Andirol A and B, two unique 6-hydroxymethylpterocarpenes from Andira inermis. Z NATURFORSCH C 2002; 57:785-90. [PMID: 12440712 DOI: 10.1515/znc-2002-9-1005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 11/15/2022]
Abstract
From a methanolic extract of the leaves of Andira inermis (Fabaceae), andirol A and B, two compounds with a novel type of a rotenoid-related skeleton and andinermol, a new 2-aryl-3-hydroxymethyl-benzofuran could be isolated. Characterisation and structure elucidation of these compounds was achieved on the basis of their spectral data. In addition, the in vitro activities of the isolated compounds against both the chloroquine-sensitive strain PoW and the chloroquine-resistant clone Dd2 of Plasmodium falciparum have been evaluated.
Collapse
Affiliation(s)
- Carola Kraft
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Gremany
| | | | | | | | | | | | | |
Collapse
|
49
|
Onegi B, Kraft C, Köhler I, Freund M, Jenett-Siems K, Siems K, Beyer G, Melzig MF, Bienzle U, Eich E. Antiplasmodial activity of naphthoquinones and one anthraquinone from Stereospermum kunthianum. Phytochemistry 2002; 60:39-44. [PMID: 11985850 DOI: 10.1016/s0031-9422(02)00072-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A lipophilic extract of the root bark of Stereospermum kunthianum revealed antiplasmodial activity in vitro. Bioassay-guided fractionation led to the isolation of four novel naphthoquinones (sterekunthals A and B, pyranokunthones A and B) and one novel anthraquinone (anthrakunthone) together with the known naphthoquinone pinnatal. The structures of the novel compounds were determined by comprehensive analyses of their 1D and 2D NMR data. The antiplasmodial activities and toxicity against the endothelial cell line ECV-304 of the isolated compounds have been assessed.
Collapse
Affiliation(s)
- Bernardina Onegi
- Department of Pharmacy (Pharmacognosy Unit), Makerere University, Kampala, Uganda
| | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Kraft C, Jenett-Siems K, Köhler I, Tofern-Reblin B, Siems K, Bienzle U, Eich E. Antiplasmodial activity of sesquilignans and sesquineolignans from Bonamia spectabilis. Phytochemistry 2002; 60:167-173. [PMID: 12009320 DOI: 10.1016/s0031-9422(02)00101-2] [Citation(s) in RCA: 25] [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: 05/23/2023]
Abstract
Phytochemical re-investigation of the aerial parts of Bonamia spectabilis (Convolvulaceae) led to the isolation of four minor tetrahydrofuran-type sesquilignans (bonaspectins E-H) together with the known neolignan virolongin A and the known lignan rel-(7S,8R,7'R,8'R)-3,3',4,4',5,5'-hexamethoxylignan. Their structures were established on the basis of spectral data. These six compounds as well as further seven lignanoids from B. spectabilis, characterised previously, were tested for their antiplasmodial activity against a chloroquine-sensitive strain (PoW) and a chloroquine-resistant clone (Dd2) of Plasmodium falciparum. Bonaspectin C 4"-O-glucoside, its aglycone, and bonaspectin D 4"-O-glucoside revealed the highest antiplasmodial activities (IC50 values: 1.3, 2.0, 6.5 microM [PoW]; 1.7, 4.6, 3.7 microM [Dd2], respectively).
Collapse
Affiliation(s)
- Carola Kraft
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Königin-Luise-Str. 2-4, D-14195 Berlin, Germany
| | | | | | | | | | | | | |
Collapse
|