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Kamdem MHK, Zingue S, Grein T, Maxeiner S, Rutz J, Mmutlane EM, Njamen D, Blaheta RA, Ndinteh DT. Aridanin and oleanane-3- O-β-D-glucoside-2'-acetamide obtained from Tetrapleura tetraptera (Schumach. & Thonn) Taub. (Fabaceae) induces potent apoptotic activity in human prostate cancer cells. JOURNAL OF ETHNOPHARMACOLOGY 2024; 319:117298. [PMID: 37866463 DOI: 10.1016/j.jep.2023.117298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 10/04/2023] [Accepted: 10/07/2023] [Indexed: 10/24/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Tetrapleura tetraptera (Schumach. and Thonn.) Taub. (Fabaceae) is a tropical plant that is used in Cameroon pharmacopeia for the treatment of many cancers including prostate cancer (PCa), which is a major cause of men's death worldwide. The objective of this study was to evaluate the anticancer properties as well as underlying mechanisms of isolates from T. tetraptera on DU145, PC3 and LNCaP cancer cell lines. MATERIALS AND METHODS Eight (8) compounds were purified from T. tetraptera stem bark extract through silica gel column chromatography (CC) and characterized using spectroscopic techniques (1D and 2D NMR), HRESIMS. Cell growth was assessed by a well-characterized MTT assay, while BrdU and clonogenicity assays provided information on the cell proliferation index. Further, the impact of the compounds on cell cycle progression and cell death were performed through Flow cytometry. Cell adhesion, cell migration and chemotaxis along with some proteins of epithelial-mesenchymal transition (EMT) were assayed. RESULTS Out of the eight (1-8) isolates from T. tetraptera only oleanane-3-O-β-D-glucoside-2'-acetamide and aridanin showed potent cell growth arrest with an estimated CC50 of 15, 23, 16 and 17, 26, 16 μg/mL on DU145, PC3 and LNCaP cells, respectively. A 15% (DU145) and 25% (LNCaP) increase in apoptotic cells induced by oleanane-3-O-β-D-glucoside-2'-acetamide and aridanin at 10 μg/mL were noticed. Oleanane-3-O-β-D-glucoside-2'-acetamide and aridanin at 2.5 and 10 μg/mL reduced the number of cells in S-phase and raised cells in G2/M phase. At the same concentrations, they decreased the number of invading DU145 cells and increased the adherence of DU145 cells to fibronectin and collagen matrix at tested concentrations, accompanied by an increase in integrin β-1 (10 μg/mL) and integrin β-4 (2.5 μg/mL) expression. Furthermore, a down-regulation of pcdk1, cdk2, Bcl-2, N-Cad, vimentin and cytokeratine 8-18 was noticed while, p19, p27, p53 pAKT, Bax, caspase-3 and E-Cad were up-regulated. CONCLUSIONS This study outlines for the first time, the anticancer ability of compounds oleanane-3-O-β-D-glucoside-2'-acetamide (4) and aridanin (6) from Tetrapleura tetraptera and proposes their putative mechanisms of action.
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Affiliation(s)
- Michael Hermann Kengne Kamdem
- Centre for Natural Product Research, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg, 2028, South Africa; Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg-Kingsway Campus, Auckland Park, 2008, South Africa.
| | - Stéphane Zingue
- Centre for Natural Product Research, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg, 2028, South Africa; Department of Urology, University Hospital Frankfurt, Johann Wolfgang Goethe-University, D-60596, Frankfurt am Main, Germany; Department of Pharmacotoxicology and Pharmacokinetics, University of Yaounde 1, P.O. Box 1364, Yaounde, Cameroon.
| | - Timothy Grein
- Department of Urology and Pediatric Urology, University Medical Center Mainz, Johannes Gutenberg-Universität Mainz, D-55131, Mainz, Germany.
| | - Sebastian Maxeiner
- Department of Urology and Pediatric Urology, University Medical Center Mainz, Johannes Gutenberg-Universität Mainz, D-55131, Mainz, Germany.
| | - Jochen Rutz
- Department of Urology and Pediatric Urology, University Medical Center Mainz, Johannes Gutenberg-Universität Mainz, D-55131, Mainz, Germany.
| | - Edwin Mpho Mmutlane
- Centre for Natural Product Research, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg, 2028, South Africa; Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg-Kingsway Campus, Auckland Park, 2008, South Africa.
| | - Dieudonné Njamen
- Department of Animal Biology and Physiology, University of Yaoundé 1, P.O. Box 812, Yaounde, Cameroon.
| | - Roman A Blaheta
- Department of Urology and Pediatric Urology, University Medical Center Mainz, Johannes Gutenberg-Universität Mainz, D-55131, Mainz, Germany.
| | - Derek Tantoh Ndinteh
- Centre for Natural Product Research, Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg, 2028, South Africa; Research Center for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg-Kingsway Campus, Auckland Park, 2008, South Africa.
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Ncongwane TB, Ndinteh DT, Smit E. Automated silylation of flavonoids using 3D printed microfluidics prior to chromatographic analysis: system development. Anal Bioanal Chem 2023; 415:7151-7160. [PMID: 37804326 PMCID: PMC10684624 DOI: 10.1007/s00216-023-04981-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/30/2023] [Accepted: 09/22/2023] [Indexed: 10/09/2023]
Abstract
Flavonoids are a class of secondary plant metabolites with low molecular weights. Most flavonoids are highly polar and unsuitable for gas chromatographic analyses. Derivatization is commonly used to make them amenable to gas chromatography by altering their physicochemical properties. Although highly effective, derivatization techniques introduce extra preparation steps and often use hazardous chemicals. The aim of this study was to automate derivatization (specifically, silylation) by developing 3D printed microfluidic devices in which derivatization of flavonoids can occur. A microfluidic device was designed and 3D printed using clear polypropylene. Quercetin and other flavonoids (TED 13 and ZTF 1016) isolated from plant extracts were silylated with N-tert-butyldimethylsilyl-N-methyltrifluoroacetamide (MTBSTFA) at room temperature both in batch and in continuous flow. All the samples were analyzed using Fourier transform infrared (FTIR) spectroscopy, gas chromatography combined with mass spectrometry (GC-MS), and high-resolution accurate mass spectrometry (HR-MS). Interestingly, the HR-MS results showed that the flow method was about 25 times more efficient than the batch method for quercetin samples. The TED 13 flavonoid was completely derivatized in the flow method compared to the batch method where the reaction was incomplete. Similar results were observed for ZTF 1016, where the flow method resulted in a four times derivatized compound, while the compound was only derivatized once in batch. In conclusion, 3D printed microfluidic devices have been developed and used to demonstrate a semi-automated, inexpensive, and more efficient natural product derivatization method based on continuous flow chemistry as an alternative to the traditional batch method.
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Affiliation(s)
- Thabang Bernette Ncongwane
- Center for Natural Products Research, Department of Chemical Sciences, University of Johannesburg, Auckland Park, PO Box 524, Johannesburg, South Africa
| | - Derek Tantoh Ndinteh
- Center for Natural Products Research, Department of Chemical Sciences, University of Johannesburg, Auckland Park, PO Box 524, Johannesburg, South Africa
| | - Elize Smit
- Center for Natural Products Research, Department of Chemical Sciences, University of Johannesburg, Auckland Park, PO Box 524, Johannesburg, South Africa.
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Nguengang RT, Tchegnitegni BT, Nono ECN, Bellier Tabekoueng G, Fongang YSF, Bankeu JJK, Chouna JR, Nkenfou CN, Fekam FB, Sewald N, Lenta BN. Constituents of the Stem Bark of Symphonia globulifera Linn. f. with Antileishmanial and Antibacterial Activities. Molecules 2023; 28:molecules28062473. [PMID: 36985446 PMCID: PMC10053230 DOI: 10.3390/molecules28062473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 03/30/2023] Open
Abstract
The chemical investigation of the n-hexane fraction from the methanol extract of the stem bark of Symphonia globulifera Linn f., which displayed good in vitro activity against Leishmania donovani NR-48822 promastigotes (IC50 43.11 µg/mL), led to the isolation of three previously unreported polyprenylated benzophenones, guttiferone U (1), V (2)/W (3), and a new tocotrienol derivative named globuliferanol (4), along with 11 known compounds (5-15). Their structures were elucidated based on their NMR and MS data. Some isolated compounds were assessed for both their antileishmanial and cytotoxic activities against L. donovani and Vero cells, respectively. Guttiferone K (5) exhibited the best potency (IC50 3.30 μg/mL), but with low selectivity to Vero cells. The n-hexane fraction and some compounds were also assessed in vitro for their antibacterial activity against seven bacterial strains. All the samples exhibited moderate to potent antibacterial activity (MICs ≤ 15.6 µg/mL) against at least one of the tested strains.
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Affiliation(s)
- Ruland Tchuinkeu Nguengang
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé I, Yaoundé P.O. Box 47, Cameroon
| | | | - Eric Carly Nono Nono
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
| | | | | | - Jean Jules Kezetas Bankeu
- Department of Chemistry, Faculty of Science, The University of Bamenda, Bambili P.O. Box 39, Cameroon
| | - Jean Rodolphe Chouna
- Department of Chemistry, Faculty of Science, University of Dschang, Dschang P.O. Box 67, Cameroon
| | - Céline Nguefeu Nkenfou
- Department of Biology, Higher Teacher Training College, University of Yaoundé I, Yaoundé P.O. Box 47, Cameroon
| | - Fabrice Boyom Fekam
- Antimicrobial & Biocontrol Agents Unit, Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, University of Yaoundé I, Yaoundé P.O. Box 812, Cameroon
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Bruno Ndjakou Lenta
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé I, Yaoundé P.O. Box 47, Cameroon
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Lipophilic Compounds and Antibacterial Activity of Opuntia ficus-indica Root Extracts from Algeria. Int J Mol Sci 2022; 23:ijms231911161. [PMID: 36232458 PMCID: PMC9569945 DOI: 10.3390/ijms231911161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/08/2022] [Accepted: 09/16/2022] [Indexed: 11/21/2022] Open
Abstract
The chemical composition, investigated by gas chromatography-mass spectrometry, and antibacterial activity of lipophilic extractives of three varieties of Opuntia ficus-indica roots from Algeria are reported in this paper for the first time. The results obtained revealed a total of 55 compounds, including fatty acids, sterols, monoglycerides and long chain aliphatic alcohols that were identified and quantified. β-Sitosterol was found as the major compound of the roots of the three varieties. Furthermore, considerable amounts of essential fatty acids (ω3, ω6, and ω9) such as oleic, linoleic, and linolenic acids were also identified. The green variety was the richest among the three studied varieties. The antibacterial activity, evaluated with disc diffusion method, revealed that lipophilic extracts were effective mainly against Gram-positive Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA) (19~23 mm). Gram-negative strains mainly Pseudomonas aeruginosa gave an inhibition zone of 18 mm, which is considered high antibacterial activity. The minimal inhibitory concentrations of the tested bacteria revealed interesting values against the majority of bacteria tested: 75–100 µg mL−1 for Bacillus sp., 250–350 µg/mL for the two Staphylococcus strains, 550–600 µg mL−1 for E. coli, and 750–950 µg mL−1 obtained with Pseudomonas sp. This study allows us to conclude that the lipophilic fractions of cactus roots possess interesting phytochemicals such as steroids, some fatty acids and long chain alcohols that acted as antibiotic-like compounds countering pathogenic strains.
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