1
|
Kana Takeuneu V, Eckhardt P, Tapondjou Tsafack B, Tsopmene UJ, Ponou BK, Dzoyem JP, Teponno RB, Opatz T, Tapondjou LA. Pyrroloquinolones B-F: Five unusual alkaloids from Vernonia glabra (Steetz) Vatke (Asteraceae). Phytochemistry 2024; 220:114010. [PMID: 38354550 DOI: 10.1016/j.phytochem.2024.114010] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 01/29/2024] [Accepted: 02/01/2024] [Indexed: 02/16/2024]
Abstract
Five unusual alkaloids featuring a pyrrolo[1,2-a]quinolone skeleton (pyrroloquinolones B-F, 1-5) were isolated from the ethanol extract of the whole plant of Vernonia glabra (Steetz) Vatke, along with sixteen known compounds. Their structures were established by means of spectroscopic (1D and 2D NMR, UV, IR, and ECD) and high resolution mass spectrometric techniques as well as by comparison of their spectroscopic data with those reported in the literature. The ethanol extract and some isolated compounds were assessed for their antibacterial activity against four bacterial strains. The extract was significantly active against Staphylococcus aureus ATCC1026 and S. epidermidis ATCC35984 (MIC = 64 μg/mL). All the tested compounds showed moderate activity against S. epidermidis (16 ≤ MIC ≤ 64 μg/mL). Furthermore, this is the first report on tricyclic pyrrolo[1,2-a]quinolone alkaloids from a plant source. A biosynthetic pathway for the formation of these compounds is also proposed.
Collapse
Affiliation(s)
- Voutro Kana Takeuneu
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
| | - Paul Eckhardt
- Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128, Mainz, Germany
| | - Borice Tapondjou Tsafack
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
| | - Ulrich Joël Tsopmene
- Department of Biochemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
| | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon.
| | - Jean Paul Dzoyem
- Department of Biochemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
| | - Rémy Bertrand Teponno
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128, Mainz, Germany.
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon.
| |
Collapse
|
2
|
Tematio Fouedjou R, Tsakem B, Siwe-Noundou X, Dongmo Fogang HP, Tiombou Donkia A, Kemvoufo Ponou B, Poka M, Demana PH, Teponno RB, Azefack Tapondjou L. Ethnobotany, Phytochemistry, and Biological Activities of the Genus Cordyline. Biomolecules 2023; 13:1783. [PMID: 38136652 PMCID: PMC10741932 DOI: 10.3390/biom13121783] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/30/2023] [Accepted: 12/08/2023] [Indexed: 12/24/2023] Open
Abstract
Cordyline species have a long history in traditional medicine as a basis of treatment for various ailments such as a bloody cough, dysentery, and a high fever. There are about 26 accepted species names in this genus distributed worldwide, including C. fruticosa, C. autralis, C. stricta, C. cannifolia, and C. dracaenosides. This work presents a comprehensive review of the traditional uses of plants of the genus Cordylie and their chemical constituents and biological activities. A bibliographic search was conducted to identify available information on ethnobotany, ethnopharmacology, chemical composition, and biological activities. A total of 98 isolated compounds potentially responsible for most of the traditional medicinal applications have been reported from eight species of Cordyline and are characterised as flavonoid, spirostane, furostane, and cholestane glycosides. Some of these pure compounds, as well as extracts from some species of Cordyline, have exhibited noteworthy anti-oxidant, antiproliferative, antimicrobial, and hypolipidemic activities. Although many of these species have not yet been investigated phytochemically or pharmacologically, they remain a potential source of new bioactive compounds.
Collapse
Affiliation(s)
- Romuald Tematio Fouedjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Bienvenu Tsakem
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Xavier Siwe-Noundou
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, P.O. Box 218, Pretoria 0208, South Africa; (M.P.); (P.H.D.)
| | - Hervet P. Dongmo Fogang
- Department of Physiological Sciences and Biochemistry, Faculty of Medicine and Biomedical, Sciences, University of Garoua, Garoua P.O. Box 317, Cameroon;
| | - Aphalaine Tiombou Donkia
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Madan Poka
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, P.O. Box 218, Pretoria 0208, South Africa; (M.P.); (P.H.D.)
| | - Patrick H. Demana
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, P.O. Box 218, Pretoria 0208, South Africa; (M.P.); (P.H.D.)
| | - Rémy B. Teponno
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon; (R.T.F.); (B.T.); (A.T.D.); (B.K.P.); (L.A.T.)
| |
Collapse
|
3
|
Chedjou IN, Ngouafong FT, Tchuenguem RT, Dzoyem JP, Ponou BK, Teponno RB, Barboni L, Tapondjou LA. Siamoside A: a new C-glycosylated flavone from Senna siamea (Lam.) H. S. Irwin & Barneby (Caesalpiniaceae). Nat Prod Res 2023; 37:3461-3469. [PMID: 35687822 DOI: 10.1080/14786419.2022.2085699] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 05/04/2022] [Accepted: 05/26/2022] [Indexed: 10/18/2022]
Abstract
Phytochemical investigation of the methanol extracts from the leaves and bark of Senna siamea resulted in the isolation of one new flavone C-glycoside: apigenin-8-C-[6''-(E)-feruloyl]-β-D-glucopyranoside] (1), together with sixteen known compounds including quercetin-3-O-α-L-rhamnoside (2), vitexin (3), isovitexin (4), quercetin-3-O-β-D-glucopyranoside (5), quercetin-3-O-β-D-arabinopyranoside (6), quercetin (7), kaempferol (8), methyl inositol (9), sucrose (10), betulinic acid (11), vanillic acid (12), stigmastane-3β,6α-diol (13), aurantiamide acetate (14), robinetinidol (15), catechin (16) and epicatechin (17). The structures of these compounds were established on the basis of their spectroscopic (1 D and 2 D NMR) and mass spectrometric (ESI-TOF-MS) data. The methanol extracts, fractions and some of the isolated compounds were screened for their antimicrobial properties against five microbial strains. The methanol extract and the ethyl acetate fraction from the bark showed very weak antifungal activity against C. glabrata with the same MIC value of 128 μg/mL. Compound 7 was weakly active against C. albicans with MIC of 32 μg/mL.
Collapse
Affiliation(s)
- Isaac Nde Chedjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Francis Tatong Ngouafong
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | | | - Jean Paul Dzoyem
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Rémy Bertrand Teponno
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Luciano Barboni
- School of Science and Technology, Chemistry Division, University of Camerino, CHIP - CHemistry Interdisciplinary Project, Camerino, Italy
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| |
Collapse
|
4
|
Tsakem B, Toussie BT, Siwe-Noundou X, Ponou BK, Teponno RB, Musharraf SG, Tapondjou LA. Structure elucidation of olasubscorpioside C, a new rotameric biflavonoid glycoside from the stem barks of Olax subscorpioidea (Oliv). Magn Reson Chem 2023. [PMID: 37340817 DOI: 10.1002/mrc.5375] [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] [Grants] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 05/31/2023] [Accepted: 06/04/2023] [Indexed: 06/22/2023]
Abstract
From the n-butanol soluble fraction of the ethanol extract of the medicinal plant Olax subscorpioidea, a previously unreported rotameric biflavonoid glycoside constituted of 4'-O-methylgallocatechin-(4α → 8)-4'-O-methylgallocatechin as aglycone named olasubscorpioside C (1) along with the known 4'-O-methylgallocatechin (2) were isolated. Their structures were determined on the basis of spectrometric and spectroscopic techniques including HRFABMS, 1 H and 13 C NMR, DEPT 135o , HSQC, HMBC, ROESY, and CD followed by comparison with the reported data.
Collapse
Affiliation(s)
- Bienvenu Tsakem
- Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Billy Tchegnitegni Toussie
- Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Xavier Siwe-Noundou
- Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria, South Africa
| | | | - Rémy Bertrand Teponno
- Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Syed Ghulam Musharraf
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | | |
Collapse
|
5
|
Kenmogne CF, Ponou BK, Kemkuignou BM, Kühlborn J, Tchuenguem RT, Teponno RB, Dzoyem JP, Opatz T, Tapondjou LA. Mimonoside D: a new triterpenoid saponin from Mimosa diplotricha Sauvalle (Fabaceae). Nat Prod Res 2023; 37:1356-1364. [PMID: 34844474 DOI: 10.1080/14786419.2021.2008386] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A new triterpenoid saponin (Mimonoside D: 3-O-α-L-arabinopyranosyl-3β-hydroxyolean-12-en-28-oic acid 28-O-β-D-xylopyranosyl-(1→2)-β-D- glucopyranoside ester (1)) was isolated from the aerial parts of Mimosa diplotricha Sauvalle together with nine known compounds: 7,4'-dihydroxyflavone (2), kaempferol (3), lupeol (4), betulinic acid (5), β-sitosterol (6), β-sitosterol-3-O-β-D-glucopyranoside (7), lutein (8), 5,2'-dihydroxy-7,4',5'-trimethoxyflavone (9) and vitexin (10). Their structures were elucidated on the basis of spectroscopic (1 D and 2 D nuclear magnetic resonance) and high-resolution mass spectrometric data as well as by comparison of their spectral data with those of related compounds. Compounds 2, 7 and 8 had already been isolated from M. diplotricha, while compounds 3, 4, 5 and 6 have been isolated from other Mimosa species. Compound 2 moderately inhibited Proteus mirabilis (MIC = 32 µg/mL), weakly inhibited Pseudomonas aeruginosa (MIC = 64 µg/mL) and very weakly inhibited Staphylococcus aureus (MIC = 128 µg/mL) and Enterococus faecalis (MIC = 128 µg/mL).
Collapse
Affiliation(s)
- Claudie Fokou Kenmogne
- Faculty of Science, Research Unit of Environmental and Applied Chemistry, Department of Chemistry, University of Dschang, Dschang, Cameroon
| | - Beaudelaire Kemvoufo Ponou
- Faculty of Science, Research Unit of Environmental and Applied Chemistry, Department of Chemistry, University of Dschang, Dschang, Cameroon
| | | | - Jonas Kühlborn
- Department of Chemistry, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Roland T Tchuenguem
- Faculty of Science, Department of Biochemistry, University of Dschang, Dschang, Cameroon
| | - Rémy Bertrand Teponno
- Faculty of Science, Research Unit of Environmental and Applied Chemistry, Department of Chemistry, University of Dschang, Dschang, Cameroon
| | - Jean Paul Dzoyem
- Faculty of Science, Department of Biochemistry, University of Dschang, Dschang, Cameroon
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Léon Azefack Tapondjou
- Faculty of Science, Research Unit of Environmental and Applied Chemistry, Department of Chemistry, University of Dschang, Dschang, Cameroon
| |
Collapse
|
6
|
Tiombou Donkia AP, Tchegnitegni BT, Tsafack BT, Tchuenguem RT, Ponou BK, Teponno RB, Dzoyem JP, Musharraf SG, Tapondjou LA. Desmoarylcoumarin and episoyasapogenol B: two new compounds from Desmodium salicifolium (Poir.) DC (Fabaceae). Nat Prod Res 2023:1-11. [PMID: 36815546 DOI: 10.1080/14786419.2023.2181804] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/07/2023] [Accepted: 02/13/2023] [Indexed: 02/24/2023]
Abstract
A new 3-arylcoumarin, 7-hydroxy-6-(1,1-dimethylallyl)-2',5'-dihydroxy-4'-(3,3dimethylprenyl)-3-arylcoumarin (desmoarylcoumarin) 1, a previously unreported oleanane-type triterpenoid, 3β,22β,23-trihydroxyolean-12-en (episoyasapogenol B) 2, together with five known flavonoids including darbergioidin (3), isoferreirin (4), quercetin (5), vitexin (6), swertizin (7), and one carbohydrate, sucrose (8) were isolated from the methanolic extract of the roots of Desmodium salicifolium. Their structures were elucidated mainly by extensive spectroscopic analysis (1D and 2D) and mass spectrometric (HRFAB-MS) data. The methanolic extract, EtOAc and n-BuOH fractions as well as some isolated compounds were assessed for their antibacterial and antioxidant activities. The EtOAc fraction exhibited moderate activity against Enterococcus faecalis with MIC value of 128 µg/mL. The methanolic extract and the EtOAc fraction displayed DPPH scavenging activity with EC50 values of 5.99 and 2.06 μg/mL, respectively. Compound 1 showed a moderate antibacterial activity against Enterococcus faecalis with a MIC of 16 µg/mL. It also showed moderate DPPH scavenging activity.
Collapse
Affiliation(s)
| | - Billy Toussie Tchegnitegni
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Borice Tapondjou Tsafack
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | | | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Rémy Bertrand Teponno
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Jean Paul Dzoyem
- Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Syed Ghulam Musharraf
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| |
Collapse
|
7
|
Tsakem B, Eckhardt P, Tchuenguem RT, Ponou BK, Dzoyem JP, Teponno RB, Opatz T, Barboni L, Tapondjou LA. Muellerilactone and other bioactive constituents of Phyllanthus muellerianus (kuntze) exell. BIOCHEM SYST ECOL 2022. [DOI: 10.1016/j.bse.2022.104397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
8
|
Fouedjou RT, Ponou BK, Teponno RB, Melzig M, Tanaka C, Miyamoto T, Tapondjou LA. Two new triterpenoid saponins: telephiifoliosides A and B from the roots of Corrigiola litoralis subsp. telephiifolia (Pourr.) Briq. Nat Prod Res 2021; 36:4949-4956. [PMID: 33939575 DOI: 10.1080/14786419.2021.1914030] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The polar fraction of the MeOH extract of the roots of Corrigiola litoralis subsp. telephiifolia (Pourr.) Briq. (Caryophyllaceae) was investigated for its constituents and two previously unreported monodesmosides triterpene saponins, telephiifoliosides A and B (1 and 2), along with the known bonushenricoside A (3) were isolated. Their structures were elucidated by combined spectroscopic and spectrometric techniques (1H NMR, 13C NMR, HSQC, 1H-1H COSY, HMBC, TOCSY, NOESY, HRESIMS) and chemical methods. The structures of the new saponins were established as; 3-O-α-L-arabinopyranosyljaligonic acid (1), and 3-O-α-L-arabinopyranosylphytolaccagenin ester (2). Upon evaluation of the antiproliferative activity on human malignant epithelial (HeLa) cells, none of the isolated compounds was efficient at the concentration of 33 µM. HighlightsThis is the first phytochemical study on Corrigiola litoralis subsp. telephiifolia.Two new saponins were isolated from the roots of Corrigiola litoralis subsp. telephiifolia.The isolated compounds were tested for their antiproliferative activity.
Collapse
Affiliation(s)
- Romuald Tématio Fouedjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon.,Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon.,Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Rémy Bertrand Teponno
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Matthias Melzig
- Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Berlin, Germany
| | - Chiaki Tanaka
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Tomofumi Miyamoto
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
| |
Collapse
|
9
|
Bomgning CLK, Sinda PVK, Ponou BK, Fotio AL, Tsague MK, Tsafack BT, Kühlborn J, Mbuyo-Nguelefack EP, Teponno RB, Opatz T, Tapondjou LA, Nguelefack TB. Hepatoprotective effects of extracts, fractions and compounds from the stem bark of Pentaclethra macrophylla Benth: Evidence from in vitro and in vivo studies. Biomed Pharmacother 2021; 136:111242. [PMID: 33486213 DOI: 10.1016/j.biopha.2021.111242] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/18/2020] [Revised: 12/20/2020] [Accepted: 12/31/2020] [Indexed: 11/28/2022] Open
Abstract
AIM To identify the bioactive hepatoprotective components of the ethanol extract of Pentaclethra macrophylla stem bark using in vitro and in vivo approaches. METHODS The bioguided-fractionation of the ethanol extract was based on the substances' capacity to prevent in vitro, the lipid peroxidation of hepatocytes' membranes induced by hydrogen peroxide. For the in vivo hepatoprotective test, mice were treated orally with the ethyl acetate (EtOAc) fraction of the ethanol extract at doses of 50 and 75 mg/kg/day for one week and subjected to d-galactosamine/lipopolysaccharide (GaIN/LPS)-induced hepatotoxicity. Blood samples were collected for alanine aminotransferase (ALAT), aspartate aminotransferase (ASAT), TNF-α and IL-1β assays. The liver was harvested for histological and biochemical (proteins, glutathione (GSH), catalase and superoxide dismutase (SOD)) analysis. RESULTS The ethanol extract and fractions induced concentration-dependent inhibition of lipid peroxidation (IC50: 3.21-48.90 μg/mL) greater than that of silymarin (IC50: 117.4 μg/mL). The purification of the sub-fractions of EtOAc fraction yielded: (7R)-7-hydroxyhexacosanoic acid (1), (7R)-1-(7-hydroxyhexacosanoyl) glycerol (2), bergenin (3), 11-O-galloylbergenin (4), 2-hydroxymethyl-5-(2-hydroxypropan-2-yl)phenol (5), β-sitosterol 3-O-β-d-glucopyranosyl (6) and β-sitosterol (7)), among which 11-O-galloylbergenin (IC50:1.8 μg/mL) was the most effective. The EtOAc fraction significantly reduced the serum level of ALAT, ASAT and TNF-α in vivo. This EtOAc fraction increased the liver protein content and protected the liver against structural damages, but did not boost the endogenous antioxidant parameters. CONCLUSION The stem bark of Pentaclethra macrophylla possesses hepatoprotective effects that may result from its capacity to inhibit lipid peroxidation and could be attributed to its active components 3, 4 and 2.
Collapse
Affiliation(s)
- Cyrille Lionel Kamga Bomgning
- Research Unit of Animal Physiology and Phytopharmacology, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon.
| | - Pierre Valery Kemdoum Sinda
- Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon.
| | - Beaudelaire Kemvoufo Ponou
- Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon.
| | - Agathe Lambou Fotio
- Department of Zoology and Animal Physiology, Faculty of Science, University of Buea, P.O. Box 63, Buea, Cameroon.
| | - Mathias Kenfack Tsague
- Research Unit of Animal Physiology and Phytopharmacology, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon.
| | - Borice Tapondjou Tsafack
- Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon.
| | - Jonas Kühlborn
- Johannes Gutenberg University Mainz, Department of Chemistry, Duesbergweg 10-14, D-55128, Mainz, Germany.
| | - Elvine Pami Mbuyo-Nguelefack
- Research Unit of Animal Physiology and Phytopharmacology, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon.
| | - Rémy Bertrand Teponno
- Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon.
| | - Till Opatz
- Johannes Gutenberg University Mainz, Department of Chemistry, Duesbergweg 10-14, D-55128, Mainz, Germany.
| | - Léon Azefack Tapondjou
- Research Unit of Environmental and Applied Chemistry, Faculty of Science, University of Dschang, Box 67, Dschang, Cameroon.
| | - Télesphore Benoit Nguelefack
- Research Unit of Animal Physiology and Phytopharmacology, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon.
| |
Collapse
|
10
|
Tapondjou LA, Fouedjou RT, Nguelefack EP, Ponou BK, Nguelefack TB, Barboni L. Antioxidant Activities and Chemical Constituents of Extracts from Cordyline fruticosa (L.) A. Chev. (Agavaceae) and Eriobotrya japonica (Thunb) Lindl, (Rosaceae). ACTA ACUST UNITED AC 2016. [DOI: 10.5567/pharmacologia.2016.103.113] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
11
|
Ponou BK, Teponno RB, Ricciutelli M, Nguelefack TB, Quassinti L, Bramucci M, Lupidi G, Barboni L, Tapondjou LA. Novel 3-oxo- and 3,24-dinor-2,4-secooleanane-type triterpenes from Terminalia ivorensis A. Chev. Chem Biodivers 2011; 8:1301-9. [PMID: 21766451 DOI: 10.1002/cbdv.201000145] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Two new oleanane-type triterpenes named ivorengenin A (=3-oxo-2α,19α,24-trihydroxyolean-12-en-28-oic acid; 1) and ivorengenin B (=4-oxo-19α-hydroxy-3,24-dinor-2,4-secoolean-12-ene-2,28-dioic acid; 2), together with five known compounds, arjungenin, arjunic acid, betulinic acid, sericic acid, and oleanolic acid, were isolated from the barks of Terminalia ivorensis A. Chev. (Combretaceae). Their structures were established on the basis of 1D- and 2D-NMR data, and mass spectrometry. A biogenetic pathway to the formation of these compounds from sericic acid, isolated as the major compound from this plant, was proposed. The antioxidant activities of different compounds were investigated by means of the 2,2-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assays, and IC(50) values were calculated and compared with Trolox activity. Antiproliferative activities of the isolated compounds were also evaluated against MDA-MB-231, PC3, HCT116, and T98G human cancer cell lines, against which the compounds showed significant cytotoxic activities.
Collapse
Affiliation(s)
- Beaudelaire Kemvoufo Ponou
- Laboratory of Environmental and Applied Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, Box 183, Dschang, Cameroon
| | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Ponou BK, Teponno RB, Ricciutelli M, Quassinti L, Bramucci M, Lupidi G, Barboni L, Tapondjou LA. Dimeric antioxidant and cytotoxic triterpenoid saponins from Terminalia ivorensis A. Chev. Phytochemistry 2010; 71:2108-2115. [PMID: 20850160 DOI: 10.1016/j.phytochem.2010.08.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Revised: 08/17/2010] [Accepted: 08/19/2010] [Indexed: 05/29/2023]
Abstract
Three saponins, including two dimeric triterpenoid glucosides possessing an unusual skeleton, ivorenosides A and B, and a monomeric triterpenoid saponin (ivorenoside C), together with the known sericoside, were isolated from the bark of Terminalia ivorensis. Their structures were established on the basis of 1D and 2D NMR data, chemical methods and tandem MS-MS spectrometry as a dimer of β-D-glucopyranosyl-18,19-seco-2α,3β,19,19,24-pentahydroxyolean-12-en-28-oate and β-D-glucopyranosyl-2α,3β,19α,24-tetrahydroxyolean-12-en-28-oate (ivorenoside A, 1), a dimer of β-D-glucopyranosyl-18,19-seco-24-carboxyl-2α,3β,19,19-tetrahydroxyolean-12-en-28-oate and β-D-glucopyranosyl-2α,3β,19α,24-tetrahydroxyolean-12-en-28-oate (ivorenoside B, 2) and β-D-glucopyranosyl-2α,3β,19β,24-tetrahydroxyolean-11-oxo-olean-12-en-28-oate (ivorenoside C, 3). Ivorenosides A and B are the first examples in nature of dimeric triterpenoid saponins with a 18,19-seco E ring of one of the two units. These isolated compounds were evaluated for their antioxidant properties and further for their cytotoxic activity against four human cancer cell lines. Ivorenoside B and C exhibited scavenging activity against DPPH and ABTS(+) radicals with IC(50) values comparable with that of the standard drug Trolox and ivorenoside A showed antiproliferative activity against MDA-MB-231 and HCT116 human cancer cell lines with IC(50) values of 3.96 and 3.43 μM, respectively.
Collapse
|