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Yan XW, Du SY, Wang XT, Zhu KK, Fang L. New monoterpenoid indole alkaloids from the stems of Tabernaemontana bovina Lour (Apocynaceae). Nat Prod Res 2024; 38:2447-2452. [PMID: 36787196 DOI: 10.1080/14786419.2023.2180503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/30/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023]
Abstract
Two new monoterpenoid indole alkaloids, named taberibogines E and F (1 and 2), together with three known ones (3-5) were isolated from the stems of Tabernaemontana bovina Lour (Apocynaceae). Their structures including absolute configurations were elucidated from a combination of NMR and HRESIMS data and NMR calculations as well as DP4+ probability analyses. Compounds 1 and 2 exhibited inhibitory effects on LPS-induced nitric oxide (NO) production in RAW 264.7 macrophages.
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Affiliation(s)
- Xue-Wei Yan
- School of Biological Science and Technology, University of Jinan, Jinan, China
- Key Laboratory of Natural Pharmaceutical Chemistry, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Si-Yu Du
- School of Biological Science and Technology, University of Jinan, Jinan, China
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China
| | - Xiao-Tong Wang
- PingYi County Traditional Chinese Medicine, Linyi, China
| | - Kong-Kai Zhu
- School of Biological Science and Technology, University of Jinan, Jinan, China
| | - Lei Fang
- School of Biological Science and Technology, University of Jinan, Jinan, China
- Key Laboratory of Natural Pharmaceutical Chemistry, Shandong University of Traditional Chinese Medicine, Jinan, China
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2
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Soares Ribeiro Nogueira T, Gonçalves Curcino Vieira M, Rodrigues da Silva Robaina R, Braz-Filho R, da Costa Gontijo D, Braga de Oliveira A, Curcino Vieira IJ. An update review on monoterpene indole alkaloids and biological activities of Tabernaemontana species occurring in Brazil. JOURNAL OF ETHNOPHARMACOLOGY 2024; 328:117921. [PMID: 38369065 DOI: 10.1016/j.jep.2024.117921] [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: 09/29/2023] [Revised: 01/06/2024] [Accepted: 02/15/2024] [Indexed: 02/20/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Tabernaemontana genus belongs to the Apocynaceae family of which 30 species are found in Brazil. Some Tabernaemontana species are used by Brazilian indigenous people and other communities, or are listed in the Yanomami Pharmacopeia. Ethnopharmacological data include use(s) for muscle problems, depressed sternum, back pain, abscess, indigestion, eye irritation, earache, itching, vaginal discharge, as an aid for older people who are slow and forgetful, mosquito and snake bites, infection by the human botfly larvae, calmative, and fever. Obviously, many of these uses are attributed to the alkaloids found in Tabernaemontana species. AIM OF THE REVIEW The aim is to gather information on Tabernaemontana species occurring in Brazil, as sources of monoterpene indole alkaloids (MIAs). In addition, we aim to collect reported experimental demonstrations of their biological activity, which may provide the foundation for further studies, including phytochemistry, the development of medicinal agents, and validation of phytopreparations. MATERIAL AND METHODS The Brazilian Flora 2020 database was used as source for Tabernamontana species occurring in Brazil. The literature review on these species was collected from Web of Science, Scopus, PubMed, and Scifinder. The keywords included names and synonyms of Tabernaemontana species found in Brazil, which were validated by the Word Flora Online Plant List. RESULTS A literature survey covering the time frame from 1960 until June 2023 resulted in 121 MIAs, including 48 not yet reported in the last review published in 2016. Some alkaloid extracts, fractions, and isolated alkaloids present evidenced biological activity, such as anticancer, anti-inflammatory, antinociceptive, antimicrobial, antiparasitic, antiviral, and against snake venoms, among others. Notably, ethnopharmacological based information has been the basis of some reports on Tabernaemontana species. CONCLUSIONS Our literature survey shows that Tabernaemontana species present bioactive MIAs, such as voacamine and affinisine, demonstrating significant cytotoxicity activity against several tumoral cell lines. Those compounds can be considered promising candidates in the search for new anticancer drugs. However, the Amazonian plant biome is increasingly damaged, which may lead to the extinction of biological diversity. This threat may also affect Tabernaemontana species, which have scarcely been investigated regarding the potential of their phytochemicals for the development of new drugs.
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Affiliation(s)
- Thalya Soares Ribeiro Nogueira
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Químicas, Centro de Ciências e Tecnologia, Avenida Alberto Lamego, Campos dos Goytacazes, Rio de Janeiro, 28013-602, Brazil
| | - Milena Gonçalves Curcino Vieira
- Instituto Federal de Educação, Ciência e Tecnologia Fluminense, campus Campos-Centro, Rua Dr. Siqueira, 273, Parque Tamandaré, Campos dos Goytacazes, Rio de Janeiro, 28030-130, Brazil
| | - Renata Rodrigues da Silva Robaina
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Químicas, Centro de Ciências e Tecnologia, Avenida Alberto Lamego, Campos dos Goytacazes, Rio de Janeiro, 28013-602, Brazil
| | - Raimundo Braz-Filho
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Químicas, Centro de Ciências e Tecnologia, Avenida Alberto Lamego, Campos dos Goytacazes, Rio de Janeiro, 28013-602, Brazil; Universidade Federal Rural do Rio de Janeiro, Departamento de Química Orgânica, Instituto de Química, Seropédica, Rio de Janeiro, 20000-000, Brazil
| | - Douglas da Costa Gontijo
- Universidade de Brasília, Instituto de Química, Asa Norte, 70910-900, Brasília, Distrito Federal, Brazil
| | - Alaíde Braga de Oliveira
- Faculdade de Fármácia, Departamento de Produtos Farmacêuticos, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Pampulha, 31270-901, Belo Horizonte, MG, Brazil.
| | - Ivo José Curcino Vieira
- Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Ciências Químicas, Centro de Ciências e Tecnologia, Avenida Alberto Lamego, Campos dos Goytacazes, Rio de Janeiro, 28013-602, Brazil
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Szwarc S, Jagora A, Derbré S, Leblanc K, Rharrabti S, Said-Hassane C, El Kalamouni C, Gallard JF, Le Pogam P, Beniddir MA. Combination of Machine Learning and Empirical Computation for the Structural Validation of Trirosaline, a Natural Trimeric Monoterpene Indole Alkaloid from Catharanthus roseus. Org Lett 2024; 26:274-279. [PMID: 38134219 DOI: 10.1021/acs.orglett.3c03972] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Abstract
Chemical investigation of the emblematic Catharanthus roseus led to the discovery of trirosaline (1), the first example of a tris-ajmalicine-type monoterpene indole alkaloid and the first natural trimeric MIA ever reported from this deeply dug plant species. Its structure was primarily elucidated based on NMR and HRESIMS analyses, and the nature of its unique intermonomeric linkages was firmly confirmed based on a combination of empirical computation and ML-J-DP4 study. Its absolute configuration was mitigated by comparison of experimental and TDDFT-simulated electronic circular dichroism (ECD) spectra. A possible biosynthetic pathway for trirosaline (1) was postulated.
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Affiliation(s)
- Sarah Szwarc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Adrien Jagora
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Séverine Derbré
- Université Angers, SONAS, SFR QUASAV, Faculty of Health Sciences, Department of Pharmacy, 16 Bd Daviers, 49045 CEDEX 01 Angers, France
| | - Karine Leblanc
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Somia Rharrabti
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Charifat Said-Hassane
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical, Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Sainte Clotilde, La Réunion, France
| | - Chaker El Kalamouni
- Unité Mixte Processus Infectieux en Milieu Insulaire Tropical, Université de la Réunion, INSERM U1187, CNRS UMR 9192, IRD UMR 249, Plateforme Technologique CYROI, 97490 Sainte Clotilde, La Réunion, France
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
| | - Pierre Le Pogam
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
| | - Mehdi A Beniddir
- Équipe "Chimie des Substances Naturelles" Université Paris-Saclay, CNRS, BioCIS, 17 avenue des Sciences, 91400 Orsay, France
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Tang SY, Tan CH, Sim KS, Yong KT, Lim KH, Low YY, Lim SH. Polyneurines A-H, iboga alkaloids from Tabernaemontana polyneura. PHYTOCHEMISTRY 2023; 208:113587. [PMID: 36646163 DOI: 10.1016/j.phytochem.2023.113587] [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: 12/14/2022] [Revised: 01/09/2023] [Accepted: 01/13/2023] [Indexed: 06/17/2023]
Abstract
Eight undescribed iboga alkaloids, polyneurines A-H, were isolated from the bark of Tabernaemontana polyneura. The structures of these alkaloids were established by interpretation of the MS and NMR data, while the configurations were determined using GIAO NMR calculations and DP4+ probability analysis, TDDFT-ECD method, or X-ray diffraction analysis. Polyneurine A possesses a γ-lactone unit embedded within the iboga skeleton, while polyneurines D and E incorporate a formylmethyl moiety at C-3 of the iboga skeleton. Biosynthetic pathways towards the formation of polyneurines A, C, D, and E were proposed.
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Affiliation(s)
- Sin-Yee Tang
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Chun-Hoe Tan
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Department of Biotechnology, Faculty of Applied Science, Lincoln University, 47301, Petaling Jaya, Selangor, Malaysia
| | - Kae-Shin Sim
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kien-Thai Yong
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kuan-Hon Lim
- School of Pharmacy, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor, Malaysia
| | - Yun-Yee Low
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Siew-Huah Lim
- Department of Chemistry, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
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Structural and functional studies of a snake venom phospholipase A 2-like protein complexed to an inhibitor from Tabernaemontana catharinensis. Biochimie 2023; 206:105-115. [PMID: 36273763 DOI: 10.1016/j.biochi.2022.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/19/2022] [Accepted: 10/17/2022] [Indexed: 11/22/2022]
Abstract
Snake envenomation is an ongoing global health problem and tropical neglected disease that afflicts millions of people each year. The only specific treatment, antivenom, has several limitations that affects its proper distribution to the victims and its efficacy against local effects, such as myonecrosis. The main responsible for this consequence are the phospholipases A2 (PLA2) and PLA2-like proteins, such as BthTX-I from Bothrops jararacussu. Folk medicine resorts to plants such as Tabernaemontana catharinensis to palliate these and other snakebite effects. Here, we evaluated the effect of its root bark extract and one of its isolated compounds, 12-methoxy-4-methyl-voachalotine (MMV), against the in vitro paralysis and muscle damage induced by BthTX-I. Secondary and quaternary structures of BthTX-I were not modified by the interaction with MMV. Instead, this compound interacted in an unprecedented way with the region inside the toxin hydrophobic channel and promoted a structural change in Val31, loop 58-71 and Membrane Disruption Site. Thus, we hypothesize that MMV inhibits PLA2-like proteins by preventing entrance of fatty acid into the hydrophobic channel. These data may explain the traditional use of T. catharinensis extract and confirm MMV as a promising candidate to complement antivenom or a structural guide to develop more effective inhibitors.
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Yokota T, Masu H, Arai T. Asymmetric Friedel-Crafts-Type Reaction of 2-Vinylindoles to N-Boc Imines Using a Chiral Imidazolidine-Containing NCN-Pincer Pd Catalyst. J Org Chem 2023. [PMID: 36802597 DOI: 10.1021/acs.joc.2c02911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
A chiral imidazolidine-containing NCN-pincer Pd-OTf complex (NCN-Pd cat) promoted the asymmetric nucleophilic addition of unprotected 2-vinylindoles to N-Boc imines in a Friedel-Crafts-type manner. The chiral (2-vinyl-1H-indol-3-yl)methanamine products become nice platforms for constructing multiple ring systems.
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Affiliation(s)
- Tomoya Yokota
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Resource Innovation Center (CIRIC), Synthetic Organic Chemistry, Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, Chiba 263-8522, Japan
| | - Hyuma Masu
- Center for Analytical Instrumentation, Chiba University, 1-33 Yayoi, Inage, Chiba, Chiba 263-8522, Japan
| | - Takayoshi Arai
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Resource Innovation Center (CIRIC), Synthetic Organic Chemistry, Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba, Chiba 263-8522, Japan
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7
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Karanje P, Ghorpade V, Namdeo A, Doijad R, Karanje A. Comparison of techniques for the extraction of Camptothecin from Tabernaemontana species. Nat Prod Res 2023; 37:322-327. [PMID: 34319175 DOI: 10.1080/14786419.2021.1957886] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Extraction methods like maceration, ultrasonication, vortex mixer, soxhlet extraction and microwave assisted extraction (MAE), were evaluated for the extraction of Camptothecin (CPT) from the leaves and stem of Tabernaemontana alternifolia, Tabernaemontana divaricata and Tabernaemontana citrifolia. The extracts were analyzed by high performance thin layer chromatography (HPTLC). The results show that the leaves of Tabernaemontana alternifolia exhibited highest yield of CPT as compared to the other species. MAE was the most efficient extraction method with CPT extraction yield of 0.154 ± 0.004% w/w from Tabernaemontana alternifolia leaves followed by Soxhlet extraction, sonication, maceration, and vortex extraction methods.
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Affiliation(s)
- Pallavi Karanje
- Department of Pharmacognosy, KIMSDTU's Krishna Institute of Pharmacy, Karad, India
| | - Vishwajeet Ghorpade
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Sanjay Ghodawat University, Kolhapur, India
| | - Ajay Namdeo
- Department of Pharmacognosy, BVP's Poona College of Pharmacy, Pune, India
| | - Rajendra Doijad
- Department of Pharmaceutics, KIMSDTU's Krishna Institute of Pharmacy, Karad, India
| | - Abhijit Karanje
- Department of Pharmacognosy, Marathwada Mitra Mandal's College of Pharmacy, Thergaon, Pune, India
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In Vitro and In Silico Antistaphylococcal Activity of Indole Alkaloids Isolated from Tabernaemontana cymosa Jacq (Apocynaceae). Sci Pharm 2022. [DOI: 10.3390/scipharm90020038] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The species of the genus Tabernaemontana have a long tradition of use in different pathologies of infectious origins; the antibacterial, antifungal, and antiviral effects related to the control of the pathologies where the species of this genus are used, have been attributed to the indole monoterpene alkaloids, mainly those of the iboga type. There are more than 1000 alkaloids isolated from different species of Tabernaemontana and other genera of the Apocynaceae family, several of which lack studies related to antibacterial activity. In the present study, four monoterpene indole alkaloids were isolated from the seeds of the species Tabernaemontana cymosa Jacq, namely voacangine (1), voacangine-7-hydroxyindolenine (2), 3-oxovoacangine (3), and rupicoline (4), which were tested in an in vitro antibacterial activity study against the bacteria S. aureus, sensitive and resistant to methicillin, and classified by the World Health Organization as critical for the investigation of new antibiotics. Of the four alkaloids tested, only voacangine was active against S. aureus, with an MIC of 50 µg/mL. In addition, an in silico study was carried out between the four isolated alkaloids and some proteins of this bacterium, finding that voacangine also showed binding to proteins involved in cell wall synthesis, mainly PBP2 and PBP2a.
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Ebede GR, Mbing JN, Nama AB, Shehla N, Rahman AU, Pegnyemb DE, Ndongo JT, Choudhary MI. New glycocerebrosides from the trunk of Tabernaemontana contorta Stapf. (Apocynaceae) and their antibacterial activity. BIOCHEM SYST ECOL 2022. [DOI: 10.1016/j.bse.2022.104396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Reis FL, Adolpho L, Ruiz ALTG, Simionatto E, Dalcol II, Mostardeiro MA, Morel AF. In vitro antiproliferative activity of alkaloids isolated from Tabernaemontana catharinensis A.DC (Apocynaceae). Nat Prod Res 2022; 36:5808-5812. [PMID: 35075954 DOI: 10.1080/14786419.2021.2017928] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In this work, four alkaloids from the stem bark of T. catharinensis were isolated, namely: voacangine (1); ethyl apovincaminate (2); affinisine (3) and voachalotine (4). The alkaloids were tested in vitro for antiproliferative capacity in eight tumor cell lines: U251 (glioma), MCF-7 (breast), NCI-ADR/RES (drug resistant ovary), 786-0 (kidney), NCI-H460 (lung), HT-29 (colon), K562 (leukemia) and PC-3 (prostate) and a non-tumor keratinocyte cell line (HaCat). Antiproliferative activity was observed after 48 hours and results expressed as the concentration needed to induce 50% growth inhibition (GI50) in µM. The chemotherapy drug Doxorubicin was used as a standard. The alkaloid affinisine (3) was the most promising, showing moderate inhibition rates in addition to the cytotoxic and cytocidal effect against all strains tested. It also proved to be a very promising compound, showing high selectivity rates when compared to the non-tumor keratinocyte cell line (HaCat).
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Affiliation(s)
- Frederico Luiz Reis
- Núcleo de Pesquisa em Produtos Naturais (NPPN)-UFSM, Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Luciana Adolpho
- Núcleo de Pesquisa em Produtos Naturais (NPPN)-UFSM, Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Ana Lucia Tasca Gois Ruiz
- Centro Pluridisciplinar de Pesquisas Químicas, Biológicas e Agrícolas, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Euclésio Simionatto
- Programa de Pós-graduação em Recursos Naturais, Universidade Estadual de Mato Grosso do Sul, Naviraí, MatoGrosso do Sul, Brazil
| | - Ionara Irion Dalcol
- Núcleo de Pesquisa em Produtos Naturais (NPPN)-UFSM, Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Marco Aurélio Mostardeiro
- Núcleo de Pesquisa em Produtos Naturais (NPPN)-UFSM, Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Ademir Farias Morel
- Núcleo de Pesquisa em Produtos Naturais (NPPN)-UFSM, Programa de Pós-Graduação em Química, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
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In Vitro Investigation of the Antioxidant and Cytotoxic Potential of Tabernaemontana ventricosa Hochst. ex A. DC. Leaf, Stem, and Latex Extracts. HORTICULTURAE 2022. [DOI: 10.3390/horticulturae8020091] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Tabernaemontana ventricosa (Apocynaceae) a latex-bearing plant is used in traditional medicine for its therapeutic benefits in reducing fever and hypertension and wound healing. Due to limited information on the plant’s pharmacological activities, this study aimed to investigate the antioxidant potential of the leaf, stem, and latex extracts of T. ventricosa, using the Folin-Ciocalteu (total phenolics), aluminum chloride colorimetric (total flavonoids), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and ferric reducing antioxidant power (FRAP) assays. The cytotoxic activity was evaluated in the human HEK293 (embryonic kidney), HeLa (cervical carcinoma), and MCF-7 (breast adenocarcinoma) cell lines using the MTT assay. The latex extracts possessed the highest total phenolic content (115.36 ± 2.89 mg GAE/g), followed by the stem hexane extracts (21.33 ± 0.42 mg GAE/g), the chloroform leaf (7.89 ± 0.87 mg GAE/g), and the chloroform stem (4.69 ± 0.21 mg GAE/g) extracts. The flavonoid content was substantially high ranging from 946.92 ± 6.29 mg QE/g in the stem hexane, 768.96 ± 5.43 mg QE/g in the latex, 693.24 ± 4.12 mg QE/g in the stem chloroform, and 662.20 ± 1.00 mg QE/g in the leaf hexane extracts. The DPPH assays showed the highest percentage of inhibition at 240 µg/mL, for the stem hexane (70.10%), stem methanol (65.24%), and stem chloroform (60.26%) extracts, with their respective IC50 values of 19.26 µg/mL (stem hexane), 6.19 µg/mL (stem methanol), and 22.56 µg/mL (stem chloroform). The FRAP assays displayed minimal inhibition ranging from 4.73% to 14.40%, except for the latex extracts which displayed moderate inhibition at 15 µg/mL (21.82%) and substantial inhibition at 240 µg/mL (98.48%). The HeLa and MCF-7 cell lines were the most sensitive to the extracts, with the hexane, chloroform, and methanol leaf and stem, and latex extracts significantly affecting the percentage cell survival. Overall, the various parts of T. ventricosa exhibited strong antioxidant activity correlating to its cytotoxicity. Further studies should focus on the isolation of specific antioxidant compounds that could be investigated for their anticancer potential.
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Ngah L, Tsopgni WDT, Nyobe JCN, Tcho AT, Langat MK, Ndom JC, Mas-Claret E, Sadgrove NJ, Waffo AFK, Phumthum M. A New Antimicrobial Phenylpropanol from the Leaves of Tabernaemontana inconspicua Stapf. (Apocynaceae) Inhibits Pathogenic Gram-Negative Bacteria. Antibiotics (Basel) 2022; 11:antibiotics11010121. [PMID: 35052998 PMCID: PMC8773313 DOI: 10.3390/antibiotics11010121] [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: 12/24/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 11/21/2022] Open
Abstract
A chemical investigation of the leaves of Tabernaemontana inconspicua Stapf. led to the isolation of a new phenylpropanol derivative, namely irisdichototin G (1), together with nine known compounds, including one polyol derivative, dambonitol (2); three alkaloids, 10-hydroxycoronaridine (3), voacristine (4) and vobasine (5); two triterpenes lupeol (6), betulinic acid (7) and three sterols, sitosterol (8), sitosterol-3-O-β-D-glucopyranoside (9) and stigmasterol (10). The structure of the new compound, as well as those of the known ones, was established by means of spectroscopic methods: NMR analysis (1H and 13C NMR, 1H-1H-COSY, HSQC, HMBC and NOESY), high-resolution mass spectrometry (HR-ESI-MS) and comparisons with previously reported data. Among the known compounds, compound 2 was firstly reported from the family Apocynaceae. Compounds 1–5 were tested for their antimicrobial effects against three Gram-negative organisms associated with human wound and systemic infections, namely Haemophilus influenzae 9435337A, Klebsiella pneumoniae 17102005 and Pseudomonas aeruginosa 2137659B. Compounds 1, 3, and 5 showed significant antimicrobial effects with minimum inhibitory concentrations (MIC) of 62.5 μg/mL, 62.5 μg/mL and 7.81 μg/mL, respectively, against Haemophilus influenzae, whereas compounds 1 and 5 showed significant antimicrobial effects, with a MIC value of 31.25 μg/mL against Pseudomonas aeruginosa. In addition, compound 3 showed significant antimicrobial activity, with a MIC value of 31.25 μg/mL against Klebsiella pneumoniae.
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Affiliation(s)
- Lidwine Ngah
- Faculty of Sciences, Department of Chemistry, University of Douala, Douala P.O. Box 24157, Cameroon; (L.N.); (W.D.T.T.); (J.C.N.); (A.F.K.W.)
| | - Willifred Dongmo Tékapi Tsopgni
- Faculty of Sciences, Department of Chemistry, University of Douala, Douala P.O. Box 24157, Cameroon; (L.N.); (W.D.T.T.); (J.C.N.); (A.F.K.W.)
| | - Judith Caroline Ngo Nyobe
- Laboratory of Quality Control for Food, Pharmaceutical and Cosmetic Products, Department of Thermal Engineering and Energy, University Institute of Technology, University of Douala, Douala P.O. Box 8698, Cameroon;
| | - Alain Tadjong Tcho
- Department of Chemistry, Faculty of Sciences, University of Buea, Buea P.O. Box 63, Cameroon;
| | - Moses K. Langat
- Royal Botanic Gardens, Kew, Kew Green, Richmond, Surrey TW9 3AE, UK; (M.K.L.); (E.M.-C.); (N.J.S.)
| | - Jean Claude Ndom
- Faculty of Sciences, Department of Chemistry, University of Douala, Douala P.O. Box 24157, Cameroon; (L.N.); (W.D.T.T.); (J.C.N.); (A.F.K.W.)
| | - Eduard Mas-Claret
- Royal Botanic Gardens, Kew, Kew Green, Richmond, Surrey TW9 3AE, UK; (M.K.L.); (E.M.-C.); (N.J.S.)
| | - Nicholas John Sadgrove
- Royal Botanic Gardens, Kew, Kew Green, Richmond, Surrey TW9 3AE, UK; (M.K.L.); (E.M.-C.); (N.J.S.)
| | - Alain François Kamdem Waffo
- Faculty of Sciences, Department of Chemistry, University of Douala, Douala P.O. Box 24157, Cameroon; (L.N.); (W.D.T.T.); (J.C.N.); (A.F.K.W.)
| | - Methee Phumthum
- Royal Botanic Gardens, Kew, Kew Green, Richmond, Surrey TW9 3AE, UK; (M.K.L.); (E.M.-C.); (N.J.S.)
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Correspondence:
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13
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González-Trujano ME, Krengel F, Reyes-Chilpa R, Villasana-Salazar B, González-Gómez JD, Santos-Valencia F, Urbina-Trejo E, Martínez A, Martínez-Vargas D. Tabernaemontana arborea and ibogaine induce paroxysmal EEG activity in freely moving mice: involvement of serotonin 5-HT 1A receptors. Neurotoxicology 2022; 89:79-91. [PMID: 34999156 DOI: 10.1016/j.neuro.2022.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 12/08/2021] [Accepted: 01/04/2022] [Indexed: 02/07/2023]
Abstract
Several Apocynaceae species, most notably Tabernanthe iboga, Voacanga africana and many Tabernaemontana species, produce ibogan-type alkaloids. Although a large amount of information exists about the Tabernaemontana genus, knowledge concerning chemistry and biological activity remains lacking for several species, especially related to their effects on the central nervous system (CNS). The aim of this study was to evaluate the effect of Tabernaemontana arborea Rose ex J.D.Sm. (T. arborea) hydroalcoholic extract (30, 56.2 and 100 mg/kg, i.p.) and two of its main alkaloids (ibogaine and voacangine, 30 mg/kg, i.p.) on electroencephalographic (EEG) activity alone and in the presence of the chemical convulsant agent pentylenetetrazole (PTZ, 85 mg/kg, i.p.) in mice. EEG spectral power analysis showed that T. arborea extract (56.2 and 100 mg/kg) and ibogaine (30 mg/kg, i.p.) promoted a significant increase in the relative power of the delta band and a significant reduction in alpha band values, denoting a CNS depressant effect. Voacangine (30 mg/kg, i.p.) provoked an EEG flattening pattern. The PTZ-induced seizures were not modified in the presence of T. arborea, ibogaine, or voacangine. However, sudden death was observed in mice treated with T. arborea extract at 100 mg/kg, i.p., combined with PTZ. Because T. arborea extract (100 mg/kg, i.p.) and ibogaine (30 mg/kg, i.p.), but not voacangine (30 mg/kg, i.p.), induced paroxysmal activity in the EEG, both were explored in the presence of a serotonin 5-HT1A receptor antagonist (WAY100635, 1 mg/kg, i.p.). The antagonist abolished the paroxysmal activity provoked by T. arborea (100 mg/kg, i.p.) but not that observed with ibogaine, corroborating the participation of serotonin neurotransmission in the T. arborea effects. In conclusion, high doses of the T. arborea extract induced abnormal EEG activity due in part to the presence of ibogaine and involving serotonin 5-HT1A receptor participation. Nevertheless, other possible constituents and mechanisms might participate in this complex excitatory activity that would be interesting to explore in future studies.
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Affiliation(s)
- María Eva González-Trujano
- Laboratorio de Neurofarmacología de Productos Naturales, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, 14370, Ciudad de México, Mexico.
| | - Felix Krengel
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Av. Universidad 3000, C.P. 04360, Ciudad Universitaria, Ciudad de México, Mexico; Instituto de Química, Universidad Nacional Autónoma de México. Circuito exterior s/n, Ciudad Universitaria, Ciudad de México, Mexico.
| | - Ricardo Reyes-Chilpa
- Instituto de Química, Universidad Nacional Autónoma de México. Circuito exterior s/n, Ciudad Universitaria, Ciudad de México, Mexico.
| | - Benjamín Villasana-Salazar
- Laboratorio de Neurofisiología del Control y la Regulación, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, 14370, Ciudad de México, Mexico.
| | - José David González-Gómez
- Laboratorio de Neurofisiología del Control y la Regulación, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, 14370, Ciudad de México, Mexico.
| | - Fernando Santos-Valencia
- Laboratorio de Neurofisiología del Control y la Regulación, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, 14370, Ciudad de México, Mexico.
| | - Edgar Urbina-Trejo
- Laboratorio de Neurofisiología del Control y la Regulación, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, 14370, Ciudad de México, Mexico.
| | - Adrián Martínez
- Laboratorio de Sueño y Epilepsia, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, 14370, Ciudad de México, Mexico.
| | - David Martínez-Vargas
- Laboratorio de Neurofisiología del Control y la Regulación, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. San Lorenzo Huipulco, 14370, Ciudad de México, Mexico.
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14
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Guzmán-Gutiérrez SL, Silva-Miranda M, Krengel F, Huerta-Salazar E, León-Santiago M, Díaz-Cantón JK, Espitia Pinzón C, Reyes-Chilpa R. Antimycobacterial Activity of Alkaloids and Extracts from Tabernaemontana alba and T. arborea. PLANTA MEDICA 2022; 88:53-61. [PMID: 32392600 DOI: 10.1055/a-1157-1732] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Tuberculosis is the main cause of death from a single infectious agent. Globally, according to the World Health Organization, in 2018, there were an estimated 1.2 million tuberculosis deaths. Moreover, there is a continuous appearance of drug-resistant strains. Thus, development of new antituberculosis medicines should receive high priority. Plant-derived natural products are promising candidates for this purpose. We therefore screened alkaloid extracts obtained from the root and stem barks of the Mexican Apocynaceae species Tabernaemontana alba and Tabernaemontana arborea, as well as the pure alkaloids ibogaine, voacangine, and voacamine, tested for activity against Mycobacterium tuberculosis H37Rv and cytotoxicity to mammalian Vero cells using the resazurin microtiter and the MTT assays, respectively. The extracts were analyzed by GC-MS and HPLC-UV. T. arborea root bark alkaloid extract showed the highest activity against M. tuberculosis (MIC100 = 7.8 µg/mL) of the four extracts tested. HPLC suggested that voacangine and voacamine were the major components. The latter was isolated by column chromatography, and its chemical structure was elucidated by 1H and 13C NMR, and MS. Unambiguous assignation was performed by HSQC, HMBC, and NOESY experiments. Voacamine is a dimeric bis-indole-type alkaloid and is 15 times more potent than the monomeric ibogan-type alkaloids ibogaine and voacangine (MIC100 = 15.6, 250.0, and 250.0 µg/mL, respectively). However, all of these compounds showed cytotoxicity to Vero cells, with a poor selectivity index of 1.00, 0.16, and 1.42, respectively. This is the first report of voacamine activity against M. tuberculosis.
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Affiliation(s)
- Silvia Laura Guzmán-Gutiérrez
- CONACyT - Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Mayra Silva-Miranda
- CONACyT - Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Felix Krengel
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad de México, México
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, México
| | | | - Mayra León-Santiago
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Jessica Karina Díaz-Cantón
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad de México, México
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Clara Espitia Pinzón
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Ricardo Reyes-Chilpa
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad de México, México
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15
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Elshaier YA, Nemr MTM, Al Refaey M, Fadaly WAA, Barakat A. Chemistry of 2-Vinylindoles: Synthesis and Applications. NEW J CHEM 2022. [DOI: 10.1039/d2nj00460g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As a class of compounds, 2-vinylindoles have demonstrated a wide range of biological properties. Due to the general interest in these synthons, new divergent protocols of chemical synthesis have been...
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16
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Kwong MMY, Lee JW, Samian MR, Wahab HA, Watanabe N, Ong EBB. Identification of Tropical Plant Extracts That Extend Yeast Chronological Life Span. Cells 2021; 10:cells10102718. [PMID: 34685698 PMCID: PMC8534465 DOI: 10.3390/cells10102718] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/03/2021] [Accepted: 10/08/2021] [Indexed: 11/20/2022] Open
Abstract
Certain plant extracts (PEs) contain bioactive compounds that have antioxidant and lifespan-extending activities on organisms. These PEs play different roles in cellular processes, such as enhancing stress resistance and modulating longevity-defined signaling pathways that contribute to longevity. Here, we report the discovery of PEs that extended chronological life span (CLS) in budding yeast from a screen of 222 PEs. We identified two PEs, the leaf extracts of Manihot esculenta and Wodyetia bifurcata that extended CLS in a dose-dependent manner. The CLS-extending PEs also conferred oxidative stress tolerance, suggesting that these PEs might extend yeast CLS through the upregulation of stress response pathways.
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Affiliation(s)
- Mandy Mun Yee Kwong
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.M.Y.K.); (J.W.L.)
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.R.S.); (H.A.W.); (N.W.)
| | - Jee Whu Lee
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.M.Y.K.); (J.W.L.)
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.R.S.); (H.A.W.); (N.W.)
| | - Mohammed Razip Samian
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.R.S.); (H.A.W.); (N.W.)
- School of Biological Sciences, Universiti Sains Malaysia—USM, Penang 11800, Malaysia
| | - Habibah A. Wahab
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.R.S.); (H.A.W.); (N.W.)
- School of Pharmaceutical Sciences, Universiti Sains Malaysia—USM, Penang 11800, Malaysia
| | - Nobumoto Watanabe
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.R.S.); (H.A.W.); (N.W.)
- Bio-Active Compounds Discovery Research Unit, RIKEN Center for Sustainable Resource Science, Saitama 351-0198, Japan
| | - Eugene Boon Beng Ong
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.M.Y.K.); (J.W.L.)
- USM-RIKEN International Centre for Ageing Science (URICAS), Universiti Sains Malaysia—USM, Penang 11800, Malaysia; (M.R.S.); (H.A.W.); (N.W.)
- Correspondence:
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17
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Bitombo AN, Zintchem AAA, Atchadé ADT, Mbabi Nyemeck Ii N, Bikobo DSN, Pegnyemb DE, Bochet CG. Antiplasmodial activities of indole alkaloids from Tabernaemontana penduliflora K. Schum (Apocynaceae). Fitoterapia 2021; 153:104941. [PMID: 34029654 DOI: 10.1016/j.fitote.2021.104941] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/16/2021] [Accepted: 05/19/2021] [Indexed: 11/26/2022]
Abstract
Five undescribed carboxy-indole alkaloids with corynanthe skeleton, penduflorines A-E (1-3) as well as a voacangine-N-oxide alkaloid, tabernaemontine (4), were isolated along with eight other known compounds (5-12) from the trunk bark of Tabernaemontana penduliflora K. Schum (Apocynaceae). Their structures were determined by means of spectroscopic and spectrometric methods such as UV, IR, NMR and HR-ESI-MS. Antiplasmodial activities of new isolates were evaluated against two strains of Plasmodium falciparum 3D7 and Dd2 by the Sybr green I-based fluorescence assay setup. Those compounds showed good in vitro activities. Among them, penduflorines A and B (1a and 1b) as well as tabernaemontine (4) showed significant inhibitory activities against the two strains with IC50 values ranged between 1.85 and 7.88 μg/mL. This is the first report of quaternary-N-indole alkaloids (1a, 1b, 2, 3a, 3b and 4) occurring in the form of zwitterion from Tabernaemontana genus.
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Affiliation(s)
- André Néhémie Bitombo
- Faculty of science, Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon; Department of Chemie, Universität of Fribourg, Fribourg, Switzerland
| | - Auguste Abouem A Zintchem
- Faculty of science, Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon; Department of Chemistry, Higher Teacher's Training College, University of Yaoundé 1, Yaoundé, Cameroon
| | | | | | - Dominique Serge Ngono Bikobo
- Faculty of science, Department of Organic Chemistry, University of Yaoundé 1, Yaoundé, Cameroon; Department of Chemie, Universität of Fribourg, Fribourg, Switzerland.
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18
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Chemistry of the chippiine/dippinine/tronocarpine class of indole alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2021. [PMID: 33663753 DOI: 10.1016/bs.alkal.2020.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
The chippiines/dippinines/tronocarpine are a family of biologically and structurally interesting polycyclic tryptamine-derived indole alkaloids isolated from the leaf and bark extracts of plants belonging to the Tabernaemontana genus. To date, 14 members of this family have been isolated and characterized. This review discusses the isolation, structure determination, biological activity, and proposed biosynthesis of these metabolites. In addition, synthetic studies on the alkaloids are described including approaches to tronocarpine and dippinine B core intermediates and total syntheses of (+)-dippinine B and (+)-tronocarpine.
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19
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Major Bioactive Alkaloids and Biological Activities of Tabernaemontana Species (Apocynaceae). PLANTS 2021; 10:plants10020313. [PMID: 33562893 PMCID: PMC7915066 DOI: 10.3390/plants10020313] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/24/2021] [Accepted: 01/29/2021] [Indexed: 01/28/2023]
Abstract
Several species belonging to the genus Tabernaemontana have been well researched and utilized for their wide-ranging biological activities. A few of the most prominent species include Tabernaemontana divaricata, Tabernaemontana catharinensis, Tabernaemontana crassa, and Tabernaemontana elegans. These species and many others within the genus often display pharmacological importance, which is habitually related to their chemical constituents. The secondary metabolites within the genus have demonstrated huge medicinal potential for the treatment of infections, pain, injuries, and various diseases. Regardless of the indispensable reports and properties displayed by Tabernaemontana spp., there remains a wide variety of plants that are yet to be considered or examined. Thus, an additional inclusive study on species within this genus is essential. The current review aimed to extensively analyze, collate, and describe an updated report of the current literature related to the major alkaloidal components and biological activities of species within the genus Tabernaemontana.
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Singh MK, Rajagopalan A, Tanimu H, Sukumaran BO. Purification, characterization and fibrino(geno)lytic activity of cysteine protease from Tabernaemontana divaricata latex. 3 Biotech 2021; 11:106. [PMID: 33569263 PMCID: PMC7847834 DOI: 10.1007/s13205-021-02643-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/03/2021] [Indexed: 11/28/2022] Open
Abstract
Protease was isolated and purified from Tabernaemontana divaricata latex and its hemostatic potential was analyzed. Crude latex enzyme was purified through ion exchange and gel filtration chromatography. Purified protease was characterized and its thrombin-like (coagulant assay, fibrinogen polymerizing, and fibrinogenolytic activity) and plasmin-like (blood and plasma clot lysis) activities were assessed accordingly. The homogeneous nature of protease was confirmed with the identification of a single band approximately at 25-kDa molecular weight position. The purified enzyme showed an enhancement of 77.32% in clot inducing ability and 89.86% improvement in blood clot lysis in comparison to that by the crude enzyme. All three subunits (Aα, Bβ and γ chains) of human fibrinogen were hydrolyzed by the purified enzyme. PAGE results of the fibrinolytic activity and blood clot lytic effect by the purified enzyme indicated the plasmin-like activity. The study lays a foundation for the development of enzyme-based approaches for pharmaceutical innovations, in which plant latex proteases can be utilized as a potential natural agent for wound healing applications.
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Affiliation(s)
- Maheshwari Kumari Singh
- Department of Biochemistry, School of Sciences-Block 1, Jain (Deemed to be University), 9th Main, 18th Cross, Jayanagar 3rd Block, Bangalore, Karnataka India
- Present Address: Karnataka State Pollution Control Board, Bangalore, Karnataka India
| | - Anusha Rajagopalan
- Department of Biochemistry, School of Sciences-Block 1, Jain (Deemed to be University), 9th Main, 18th Cross, Jayanagar 3rd Block, Bangalore, Karnataka India
| | - Habibu Tanimu
- Department of Biochemistry, School of Sciences-Block 1, Jain (Deemed to be University), 9th Main, 18th Cross, Jayanagar 3rd Block, Bangalore, Karnataka India
| | - Bindhu Omana Sukumaran
- Department of Biochemistry, School of Sciences-Block 1, Jain (Deemed to be University), 9th Main, 18th Cross, Jayanagar 3rd Block, Bangalore, Karnataka India
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21
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Kouamé T, Okpekon AT, Bony NF, N’Tamon AD, Gallard JF, Rharrabti S, Leblanc K, Mouray E, Grellier P, Champy P, Beniddir MA, Le Pogam P. Corynanthean-Epicatechin Flavoalkaloids from Corynanthe pachyceras. Molecules 2020; 25:E2654. [PMID: 32517373 PMCID: PMC7321195 DOI: 10.3390/molecules25112654] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/05/2020] [Accepted: 06/05/2020] [Indexed: 11/17/2022] Open
Abstract
Epicatechocorynantheines A and B, and epicatechocorynantheidine were isolated from the stem bark of Corynanthe pachyceras. These molecules were pinpointed, and their isolation streamlined, by a molecular networking strategy. The structural elucidation was unambiguously accomplished from HRMS and 1D/2D NMR data. These compounds represent the first examples of corynanthean-type alkaloids tethered with a flavonoid. Epicatechocorynantheidine notably instigated two connections between the monoterpene indole alkaloid and the flavonoid, yielding an unprecedented octacyclic appendage. These flavoalkaloids exerted moderate antiplasmodial activities.
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Affiliation(s)
- Tapé Kouamé
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
- Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Univ. FHB, 22 BP 582 Abidjan 22, Côte d’Ivoire, France;
| | - Aboua Timothée Okpekon
- Laboratoire de Chimie Organique et de Substances Naturelles (LCOSN), UFR Sciences des Structures de la Matière et Technologie, Univ. FHB, 22 BP 582 Abidjan 22, Côte d’Ivoire, France;
| | - Nicaise F. Bony
- Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256 Abidjan 06, Côte d’Ivoire, France;
| | - Amon Diane N’Tamon
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
- Département de Chimie Analytique, Minérale et Générale, Technologie Alimentaire, UFR Sciences Pharmaceutiques et Biologiques, Univ. FHB, 06 B. P. 2256 Abidjan 06, Côte d’Ivoire, France;
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 21 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France;
| | - Somia Rharrabti
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Karine Leblanc
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Elisabeth Mouray
- Muséum National d′Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR7245, CP54, 57 Rue Cuvier, 75005 Paris, France; (E.M.); (P.G.)
| | - Philippe Grellier
- Muséum National d′Histoire Naturelle, Unité Molécules de Communication et Adaptation des Micro-organismes, UMR7245, CP54, 57 Rue Cuvier, 75005 Paris, France; (E.M.); (P.G.)
| | - Pierre Champy
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Mehdi A. Beniddir
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
| | - Pierre Le Pogam
- Université Paris-Saclay, CNRS, BioCIS, 92290 Châtenay-Malabry, France; (T.K.); (A.D.N.); (S.R.); (K.L.); (P.C.)
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Condello M, Pellegrini E, Multari G, Gallo FR, Meschini S. Voacamine: Alkaloid with its essential dimeric units to reverse tumor multidrug resistance. Toxicol In Vitro 2020; 65:104819. [DOI: 10.1016/j.tiv.2020.104819] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 02/13/2020] [Accepted: 03/01/2020] [Indexed: 12/16/2022]
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23
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The Secretory Apparatus of Tabernaemontana ventricosa Hochst. ex A.DC. (Apocynaceae): Laticifer Identification, Characterization and Distribution. PLANTS 2020; 9:plants9060686. [PMID: 32481708 PMCID: PMC7355860 DOI: 10.3390/plants9060686] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/17/2020] [Accepted: 05/25/2020] [Indexed: 11/28/2022]
Abstract
Due to the inconsistencies in the interpretation of laticifers within the Apocynaceae, the current study aimed to distinguish, for the first time, the type and distribution of the laticifers in the embryos, seedlings and adult plants of Tabernaemontana ventricosa (Forest Toad tree). The characterization and distribution of laticifers were determined using light and electron microscopy. The findings revealed the presence of articulated anastomosing laticifers. The laticifers were found to have originated from ground meristematic and procambium cells and were randomly distributed in all ground and vascular tissue, displaying complex branching conformations. The presence of chemical constituents within the laticifers and latex determined by histochemical analysis revealed the presence of alkaloids, phenolics, neutral lipids, terpenoids, mucilage, pectin, resin acids, carboxylated polysaccharides, lipophilic, and hydrophilic substances and proteins. These secondary metabolites perform an indispensable role in preventing herbivory, hindering and deterring micro-organisms and may possibly have medicinal importance. The outcomes of the present study outlined the first micromorphology, anatomy, ultrastructural and chemical analysis of the laticifers of T. ventricosa. In addition, this investigation similarly established the probable functions of latex and laticifers.
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Krengel F, Dickinson J, Jenks C, Reyes-Chilpa R. Quantitative Evaluation of a Mexican and a Ghanaian Tabernaemontana Species as Alternatives to Voacanga africana for the Production of Antiaddictive Ibogan Type Alkaloids. Chem Biodivers 2020; 17:e2000002. [PMID: 32232967 DOI: 10.1002/cbdv.202000002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 03/30/2020] [Indexed: 01/21/2023]
Abstract
In continuation of our efforts to provide quantitative information on antiaddictive ibogan type alkaloid-producing Tabernaemontana species, we used gas chromatography-mass spectrometry (GC/MS) to compare the alkaloid profiles of the barks and/or leaves of one Mexican and one African species - T. arborea and T. crassa, respectively, with the primary sources of commercially available semisynthetic ibogaine, Voacanga africana root and stem bark. The qualitative and quantitative similarities between T. arborea and V. africana barks consolidate previous reports regarding the potential of the former as a promising alternative source of voacangine and ibogaine. The results also suggest that T. crassa could be used to produce conopharyngine and ibogaline, two compounds with the same basic skeletal structure and possibly similar antiaddictive properties as ibogaine.
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Affiliation(s)
- Felix Krengel
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Av. Universidad 3000, Delegación, Coyoacán, C.P., 04360, Ciudad Universitaria, Ciudad de México, México.,Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior S/N, Delegación, Coyoacán, C.P., 04510, Ciudad Universitaria, Ciudad de México, México
| | | | | | - Ricardo Reyes-Chilpa
- Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Circuito Exterior S/N, Delegación, Coyoacán, C.P., 04510, Ciudad Universitaria, Ciudad de México, México
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Alcover CF, Bernadat G, Kabran FA, Le Pogam P, Leblanc K, Fox Ramos AE, Gallard JF, Mouray E, Grellier P, Poupon E, Beniddir MA. Molecular Networking Reveals Serpentinine-Related Bisindole Alkaloids from Picralima nitida, a Previously Well-Investigated Species. JOURNAL OF NATURAL PRODUCTS 2020; 83:1207-1216. [PMID: 32091210 DOI: 10.1021/acs.jnatprod.9b01247] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Five new monoterpene indole alkaloids (1-5), including four serpentinine-related bisindoles and one alstonine derivative monomer, have been isolated from the aerial parts of Picralima nitida. Their structures were elucidated by analysis of their HRMS and NMR spectroscopic data, and their absolute configurations were deduced from the comparison of experimental and simulated ECD spectra. In addition, two known compounds (6 and 7), previously undescribed from P. nitida, have also been purified. The compound isolation workflow was guided by a molecular networking-based dereplication strategy. Twenty-three compounds were dereplicated from the EtOH extract of P. nitida and fractions network and were assigned various levels of identification confidence. The antiparasitic activities against Plasmodium falciparum as well as the cytotoxic activity against the MRC-5 cell line were determined for compounds 1-7.
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Affiliation(s)
- Charlotte Fox Alcover
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Guillaume Bernadat
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Faustin A Kabran
- Laboratoire de Chimie Organique et Biologique, UFR SSMT, Université Félix Houphouët-Boigny, 22 BP 582 Abidjan 22, Côte d'Ivoire
| | - Pierre Le Pogam
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Karine Leblanc
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Alexander E Fox Ramos
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Jean-François Gallard
- Institut de Chimie des Substances Naturelles, CNRS, ICSN UPR 2301, Université Paris-Saclay, 21 Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Elisabeth Mouray
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM, UMR 7245), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités, CP52, 57 Rue Cuvier, 75005, Paris, France
| | - Philippe Grellier
- Unité Molécules de Communication et Adaptation des Microorganismes (MCAM, UMR 7245), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Universités, CP52, 57 Rue Cuvier, 75005, Paris, France
| | - Erwan Poupon
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
| | - Mehdi A Beniddir
- Équipe "Pharmacognosie - Chimie des Substances Naturelles", Université Paris-Saclay, CNRS, BioCIS, 92290, Châtenay-Malabry, France
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Athipornchai A, Ketpoo P, Saeeng R. Acetylcholinesterase Inhibitor From Tabernaemontana pandacaqui Flowers. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20911488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The inhibition of acetylcholinesterase (AChE) is still considered a strategy for the treatment of Alzheimer’s disease. The aim of this study was the search for potential drugs from natural sources which can inhibit AChE. The methanol extract of fresh flowers of Tabernaemontana pandacaqui was partitioned with n-hexane and ethyl acetate. All extracts were evaluated for AChE inhibitory activity. The ethyl acetate fraction, which showed the strongest AChE inhibitory activity, was fractionated using various chromatographic techniques, leading to the isolation of 6 compounds (1-6), which were identified mainly by spectroscopic techniques; this is the first report of these compounds from T. pandacaqui flowers. Astragalin (6) was the major active constituent. The structure-AChE inhibitory activity relationship of 6 and its derivatives was studied. The results suggest that T. pandacaqui flowers and its flavonoid compounds could be potentially used for the treatment of Alzheimer’s disease.
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Affiliation(s)
- Anan Athipornchai
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University, Bangsaen, Thailand
- The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery, Burapha University, Bangsaen, Thailand
| | - Pattrapon Ketpoo
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University, Bangsaen, Thailand
| | - Rungnapha Saeeng
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Burapha University, Bangsaen, Thailand
- The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery, Burapha University, Bangsaen, Thailand
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Foudjo Melacheu Laura G, Mfotie Njoya E, Jouda JB, Wakeu Kweka BN, Djama Mbazoa C, Wang F, Seguin E, Wandji J. A new cytotoxic indole alkaloid from Tabernaemontana inconspicua stapf. Nat Prod Res 2019; 35:1590-1595. [PMID: 31305139 DOI: 10.1080/14786419.2019.1628749] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
One new indole alkaloid derivative, 5,6-dioxo-11-hydroxy voacangine (1) together with four known compounds (2-5), were isolated from the fruits of Tabernaemontana inconspicua Stapf (Apocynaceae). Their structures were determined using 1D and 2D NMR, HRESI-MS, and a comparison with the literature. The new compound was found to be cytotoxic on human breast cancer MDA-MB 231 cells with IC50 values of 3.35 µM and 2.19 µM after 24 and 48 hours, respectively.
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Affiliation(s)
| | - Emmanuel Mfotie Njoya
- Key Laboratory of Natural Medicine and Clinical Translation, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China.,Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Jean-Bosco Jouda
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | | | - Céline Djama Mbazoa
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
| | - Fei Wang
- Key Laboratory of Natural Medicine and Clinical Translation, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
| | - Elisabeth Seguin
- Laboratoire de Pharmacogniosie, Faculté de Medicine et de Pharmacie, Université de Rouen, Rouen cedex 1, France
| | - Jean Wandji
- Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
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28
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Two new sarpagine-type indole alkaloids and antimalarial activity of 16-demethoxycarbonylvoacamine from Tabernaemontana macrocarpa Jack. J Nat Med 2019; 73:820-825. [PMID: 31140017 DOI: 10.1007/s11418-019-01317-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/06/2019] [Indexed: 10/26/2022]
Abstract
Two new sarpagine-type indole alkaloids (1 and 2), together with five known alkaloids; 12-methoxy-4-methylvoachalotine (3), 16-demethoxycarbonylvoacamine (4), isositsirikine (5), affinisine (6), affinine (7), were isolated from the bark of Tabernaemontana macrocarpa Jack. The structures of these alkaloids were determined based on spectroscopic data, chemical correlation, and comparison with the literature. 16-Demethoxycarbonylvoacamine (4) showed antiplasmodial activities against Plasmodium falciparum 3D7 and cytotoxic activities against human cell line, HepG2 cells.
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Sim DSY, Navanesan S, Sim KS, Gurusamy S, Lim SH, Low YY, Kam TS. Conolodinines A-D, Aspidosperma- Aspidosperma Bisindole Alkaloids with Antiproliferative Activity from Tabernaemontana corymbosa. JOURNAL OF NATURAL PRODUCTS 2019; 82:850-858. [PMID: 30869890 DOI: 10.1021/acs.jnatprod.8b00919] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Examination of the EtOH extract of the leaves of the Malayan Tabernaemontana corymbosa resulted in the isolation of four new (1-4) and two known bisindole alkaloids (5, 6) of the Aspidosperma- Aspidosperma type. The structures of these alkaloids were determined based on analysis of the spectroscopic data (NMR and HRESIMS). X-ray diffraction analyses of the related bisindole alkaloids conophylline (5) and conophyllinine (6) established the absolute configurations. Treatment of the bisindole alkaloid conophylline (5) with benzeneselenic anhydride gave, in addition to the known bisindole polyervinine (7) previously isolated from another Malayan Tabernaemontana, another bisindole product, 8, an isolable tautomer of 7. X-ray diffraction analyses yielded the absolute configurations of both bisindoles and in addition showed that polyervinine (7) exists primarily as the neutral dione structure. The bisindoles (1-8) and the related conophylline-type bisindoles (9-13) showed pronounced in vitro growth inhibitory activity against an array of human cancer cell lines, including KB, vincristine-resistant KB, PC-3, LNCaP, MCF7, MDA-MB-231, A549, HT-29, and HCT 116 cells, with IC50 values for the active compounds in the 0.01-5 μM range.
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Affiliation(s)
- Dawn Su-Yin Sim
- Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Suerialoasan Navanesan
- Institute of Biological Sciences, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Kae-Shin Sim
- Institute of Biological Sciences, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Subramaniam Gurusamy
- School of Chemical and Life Sciences , Nanyang Polytechnic , Singapore 569830 , Singapore
| | - Siew-Huah Lim
- Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Yun-Yee Low
- Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science , University of Malaya , 50603 Kuala Lumpur , Malaysia
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30
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Zhou J, Du SY, Dong HJ, Fang L, Feng JH. Preparative Separation of Monoterpenoid Indole Alkaloid Epimers from Ervatamia yunnanensis Tsiang by pH-Zone-Refining Counter-Current Chromatography Combined with Preparative High-Performance Liquid Chromatography. Molecules 2019; 24:molecules24071316. [PMID: 30987224 PMCID: PMC6480700 DOI: 10.3390/molecules24071316] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/02/2019] [Accepted: 04/02/2019] [Indexed: 11/16/2022] Open
Abstract
An effective method was developed for the preparative separation and purification of monoterpenoid indole alkaloid epimers from Ervatamia yunnanensis Tsiang using a combination of pH-zone-refining counter-current chromatography and preparative high-performance liquid chromatography. With this method, two pairs of MIA epimers including ervatamine (72 mg, 1), 20-epi-ervatamine (27 mg, 4), dregamine (95 mg, 2), tabernaemontanine (129 mg, 3), along with two MIAs, apparicine (112 mg, 5) and isovoacangine (15 mg, 6), were successfully purified from 2.1 g crude extract of E. yunnanensis, each with a purity of over 95% as determined by HPLC. The structures of the MIAs were identified by ESI-MS, 1D, and 2D NMR.
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Affiliation(s)
- Jie Zhou
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China.
| | - Si-Yu Du
- Key laboratory of Natural Pharmaceutical Chemistry, Shandong University of Traditional Chinese Medicine, Jinan 250200, China.
| | - Hong-Jing Dong
- Shandong Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Lei Fang
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China.
- Key laboratory of Natural Pharmaceutical Chemistry, Shandong University of Traditional Chinese Medicine, Jinan 250200, China.
| | - Jin-Hong Feng
- Shandong Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
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31
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Krengel F, Chevalier Q, Dickinson J, Herrera Santoyo J, Reyes Chilpa R. Metabolite Profiling of Anti-Addictive Alkaloids from Four Mexican Tabernaemontana Species and the Entheogenic African Shrub Tabernanthe iboga (Apocynaceae). Chem Biodivers 2019; 16:e1800506. [PMID: 30618175 DOI: 10.1002/cbdv.201800506] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 01/07/2019] [Indexed: 11/10/2022]
Abstract
Ibogaine and other ibogan type alkaloids present anti-addictive effects against several drugs of abuse and occur in different species of the Apocynaceae family. In this work, we used gas chromatography-mass spectrometry (GC/MS) and principal component analysis (PCA) in order to compare the alkaloid profiles of the root and stem barks of four Mexican Tabernaemontana species with the root bark of the entheogenic African shrub Tabernanthe iboga. PCA demonstrated that separation between species could be attributed to quantitative differences of the major alkaloids, coronaridine, ibogamine, voacangine, and ibogaine. While T. iboga mainly presented high concentrations of ibogaine, Tabernaemontana samples either showed a predominance of voacangine and ibogaine, or coronaridine and ibogamine, respectively. The results illustrate the phytochemical proximity between both genera and confirm previous suggestions that Mexican Tabernaemontana species are viable sources of anti-addictive compounds.
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Affiliation(s)
- Felix Krengel
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Av. Universidad 3000, Delegación Coyoacán, C.P. 04360, Ciudad Universitaria, Ciudad de México, México.,Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
| | - Quentin Chevalier
- Faculté des Sciences de la Vie, Université de Strasbourg (Unistra), 28 rue Goethe, 67000, Strasbourg, France
| | | | - Josefina Herrera Santoyo
- Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
| | - Ricardo Reyes Chilpa
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
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Hirasawa Y, Dai X, Deguchi J, Hatano S, Sasaki T, Ohtsuka R, Nugroho AE, Kaneda T, Morita H. New vasorelaxant indole alkaloids, taberniacins A and B, from Tabernaemontana divaricata. J Nat Med 2019; 73:627-632. [PMID: 30847757 DOI: 10.1007/s11418-019-01293-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 02/20/2019] [Indexed: 10/27/2022]
Abstract
Taberniacins A (1) and B (2), new indole alkaloids, were isolated from the stems of Tabernaemontana divaricata (Apocynaceae). Structure elucidation of 1 and 2 was based on spectroscopic methods and total synthesis. Each alkaloid showed vasorelaxant activity against phenylephrine-induced contraction of isolated rat aorta.
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Affiliation(s)
- Yusuke Hirasawa
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Xin Dai
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Jun Deguchi
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Shota Hatano
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Tadahiro Sasaki
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Ruri Ohtsuka
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Alfarius Eko Nugroho
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Toshio Kaneda
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Hiroshi Morita
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo, 142-8501, Japan.
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Garcellano RC, Cort JR, Moinuddin SGA, Franzblau SG, Ma R, Aguinaldo AM. An iboga alkaloid chemotaxonomic marker from endemic Tabernaemontana ternifolia with antitubercular activity. Nat Prod Res 2019; 34:1175-1179. [PMID: 30773907 DOI: 10.1080/14786419.2018.1550759] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Coronaridine (1) was isolated from the CH2Cl2 root extract of Tabernaemontana ternifolia. The structure of 1 was established from 1D- and 2D-NMR and HR-ESIMS experiments, and by comparison with reported spectroscopic data. To date, this is the first report of compound 1 from T. ternifolia, introduced as new Tabernaemontana species from Philippines in 2005 on the basis of morphological characters. Coronaridine, an iboga-type indole alkaloid, has been isolated from over 50 Tabernaemontana species and can thus be inferred as a chemotaxonomic marker of the genus. T. ternifolia has a distinct arrangement of leaves not known in the genus, but is variable in other genera. Its isolation from endemic T. ternifolia establishes its position in the genus and supports the claim that coronaridine is a chemical marker of the genus Tabernaemontana. Interestingly, coronaridine exhibited relatively weak activity against Mycobacterium tuberculosis H37Rv (MIC 82.64 μg/mL) (Rifampicin MIC 0.05 μg/mL).
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Affiliation(s)
- Rhea C Garcellano
- Graduate School, University of Santo Tomas, Manila, Philippines.,Tiniguiban Heights, Palawan State University, Puerto Princesa City, Philippines
| | - John R Cort
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, USA.,Institute of Biological Chemistry, Washington State University, Pullman, WA, USA
| | - Syed G A Moinuddin
- Institute of Biological Chemistry, Washington State University, Pullman, WA, USA
| | - Scott G Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Rui Ma
- Institute for Tuberculosis Research, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Alicia M Aguinaldo
- Graduate School, University of Santo Tomas, Manila, Philippines.,Phytochemistry Laboratory, Research Center for the Natural and Applied Sciences, University of Santo Tomas, Manila, Philippines
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34
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Bapela MJ, Heyman H, Senejoux F, Meyer JJM. 1H NMR-based metabolomics of antimalarial plant species traditionally used by Vha-Venda people in Limpopo Province, South Africa and isolation of antiplasmodial compounds. JOURNAL OF ETHNOPHARMACOLOGY 2019; 228:148-155. [PMID: 30048730 DOI: 10.1016/j.jep.2018.07.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 04/04/2018] [Accepted: 07/21/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Vha-Venda people living in rural areas of Limpopo Province of South Africa regularly use traditional plant-based medicines to treat malaria. In our earlier publication, twenty indigenous plant species used to treat malaria or its symptoms by Vha-Venda people were evaluated for antiplasmodial activity. The main objective of the current study was to assess the robustness of NMR-based metabolomics in discriminating classes of secondary compounds that are responsible for the observed antimalarial activity and the isolation of antiplasmodial compounds. MATERIALS AND METHODS Twenty dichloromethane extracts were reconstituted in CDCl3, subjected to 1H NMR-based metabolomic analysis on a Varian 600 MHz spectrometer and the acquired 1H NMR spectra were then evaluated collectively using multivariate data analysis (MDA). Principal Component Analysis (PCA) and Orthogonal Projections to Latent Structures-Discriminant Analysis (OPLS-DA) were used to 'globally' discern antiplasmodial profiles. A contribution plot was then generated from the OPLS-DA scoring plot in an attempt to determine the classes of compounds that are responsible for the observed grouping. Further phytochemical analyses were conducted on the lipophilic extracts of Tabernaemontana elegans and Vangueria infausta subsp. infausta. These best candidates were fractionated, purified and their isolated compounds identified based on conventional chromatographic and spectroscopic techniques. RESULTS The PCA did not separate the acquired profiles according to the detected antiplasmodial bioactivity. Application of a supervised OPLS-DA on the 1H NMR profiles resulted in a discrimination pattern that could be correlated to the observed antimalarial bioactivity. A contribution plot generated from the OPLS-DA scoring plot illustrated the classes of compounds responsible for the observed grouping. Prominent peaks were observed in the aromatic, sugar-based/N-containing and aliphatic spectral regions of the contribution plot. Two known indole alkaloids were isolated from T. elegans, and identified as tabernaemontanine (IC50 = 12.0 ± 0.8 µM) and dregamine (IC50 = 62.0 ± 2.4 µM). Friedelin (IC50 = 7.20 ± 0.5 µM) and morindolide (IC50 = 107.1 ± 0.6 µM) were isolated from V. infausta subsp. infausta. This is the first report of the rare iridoid lactone, morindolide's antimalarial activity. While these two compounds have been previously identified, this is the first account of their occurrence in the genus Vangueria. CONCLUSION The study illustrated the potential of NMR-based metabolomics in discriminating classes of compounds that may be attributed to antiplasmodial activity. Additionally, the study demonstrated the potential of discovering novel antiplasmodial scaffolds from medicinal plants and the rationale for the bioprospecting antimalarial plant species used by Vha-Venda people.
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Affiliation(s)
- M Johanna Bapela
- University of Pretoria, Department of Plant and Soil Sciences, Private Bag X20, Hatfield 0028, South Africa; University of Pretoria Institute for Sustainable Malaria Control and MRC Collaborating Centre for Malaria Research, South Africa.
| | - Heino Heyman
- University of Pretoria, Department of Plant and Soil Sciences, Private Bag X20, Hatfield 0028, South Africa; Biological Sciences Division, Pacific Northwest National Laboratory, Richland, 99352, USA
| | - Francois Senejoux
- University of Pretoria, Department of Plant and Soil Sciences, Private Bag X20, Hatfield 0028, South Africa; Clermont-Ferrand, Faculty of Pharmaceutical Sciences, University of Auvergne, France
| | - J J Marion Meyer
- University of Pretoria, Department of Plant and Soil Sciences, Private Bag X20, Hatfield 0028, South Africa
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Ali Khan MS, Misbah, Ahmed N, Arifuddin M, Rehman A, Ling MP. Indole alkaloids and anti-nociceptive mechanisms of Tabernaemontana divaricata (L.) R. Br. flower methanolic extract. Food Chem Toxicol 2018; 118:953-962. [DOI: 10.1016/j.fct.2018.06.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/30/2018] [Accepted: 06/04/2018] [Indexed: 11/26/2022]
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Nugroho AE, Moue M, Sasaki T, Shirota O, Hadi AHA, Morita H. Yohimbine-related Alkaloids from Tabernaemontana corymbosa. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Five new yohimbine-type indole alkaloids were isolated from the leaves of Tabernaemontana corymbosa. Their structures were determined on the basis of the NMR and Circular Dichroism (CD) spectroscopy.
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Affiliation(s)
- Alfarius Eko Nugroho
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2–4–41 Shinagawa-ku, Tokyo 142–8501, Japan
| | - Miho Moue
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2–4–41 Shinagawa-ku, Tokyo 142–8501, Japan
| | - Tadahiro Sasaki
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2–4–41 Shinagawa-ku, Tokyo 142–8501, Japan
| | - Osamu Shirota
- Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314–1 Shido, Sanuki City, Kagawa 769–2193, Japan
| | - A. Hamid. A. Hadi
- Department of Chemistry, Faculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia
| | - Hiroshi Morita
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2–4–41 Shinagawa-ku, Tokyo 142–8501, Japan
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In vitro antioxidant and anticataractogenic potential of silver nanoparticles biosynthesized using an ethanolic extract of Tabernaemontana divaricata leaves. Biomed Pharmacother 2017; 91:467-475. [PMID: 28477463 DOI: 10.1016/j.biopha.2017.04.079] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/15/2017] [Accepted: 04/17/2017] [Indexed: 01/14/2023] Open
Abstract
Silver nanoparticles (AgNPs) have been found useful in biological systems and in medicine since they possess a large surface area to volume ratio, which confers on them several unique properties. In the present study, AgNPs that had been biosynthesized using an ethanolic extract of Tabernaemontana divaricata leaf were evaluated for putative antioxidant potential and efficacy in preventing experimental in-vitro selenite-induced opacification of the ocular lens (cataractogenesis). The antioxidant potential of the AgNPs was evaluated in-vitro by looking for radical-scavenging activity on 1,1-diphenyl-2-picrylhydrazyl (DPPH) and hydrogen peroxide (H2O2) free radicals as well as by determining reducing power. The anticataractogenic potential of the AgNPs was evaluated in an in-vitro model of selenite-induced cataractogenesis in five groups of Wistar rat lenses cultured in Dulbecco's modified Eagle's medium (DMEM) for 24h: Group I lenses (negative control) were cultured in DMEM alone; Group II lenses were exposed to sodium selenite alone (100μM); Group III lenses were exposed simultaneously to sodium selenite and the T. divaricata extract (250μg/ml); Group IV lenses were exposed simultaneously to sodium selenite and the biosynthesized AgNPs (125μg/ml); and Group V lenses were exposed to the AgNPs alone. In these lenses, gross morphological changes, as well as activities of catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx) and glutathione-S-transferase (GST), and levels of reduced glutathione (GSH) and malondialdehyde (MDA), were determined. In-vitro, the AgNPs (which were spherical in shape with an average diameter ranging from 15 to 50nm) showed potent and concentration-dependent radical-scavenging activity on DPPH and H2O2 free radicals as well as reducing power. The gross morphological changes seen in the cultured rat lenses were: all eight control (Group I) lenses remained transparent; dense opacification was noted in all eight selenite-challenged untreated (Group II) lenses; in selenite-challenged, simultaneously T. divaricata extract-treated (Group III) lenses, no opacification occurred in seven of eight (87.5%) lenses and only minimal opacification in one (12.5%) lens; all the eight Group IV (selenite-challenged, simultaneously AgNPs-treated) lenses did not show any opacification; and all the eight Group V lenses (exposed to AgNPs alone) remained as transparent as control lenses. The mean activities of CAT, SOD, GPx and GST, and the mean levels of GSH, were significantly (p<0.05) lower in Group II lenses than those in Groups I, III, IV and V lenses, while the mean MDA level was significantly (p<0.05) higher in Group II lenses than those in Groups I, III, IV and V lenses; oxidative damage possibly occurred in Group II lenses, whereas this appears to have been prevented in Groups III and IV lenses. These observations suggest that the T. divaricata leaf ethanolic extract, and also the AgNPs biosynthesized using the T. divaricata extract, possess effective in-vitro antioxidant activity and the potential to prevent experimental selenite-induced opacification in cultured Wistar rat lenses.
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Paterna A, Kincses A, Spengler G, Mulhovo S, Molnár J, Ferreira MJU. Dregamine and tabernaemontanine derivatives as ABCB1 modulators on resistant cancer cells. Eur J Med Chem 2017; 128:247-257. [DOI: 10.1016/j.ejmech.2017.01.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 01/02/2017] [Accepted: 01/28/2017] [Indexed: 02/07/2023]
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Lavaud C, Massiot G. The Iboga Alkaloids. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2017; 105:89-136. [PMID: 28194562 DOI: 10.1007/978-3-319-49712-9_2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Iboga alkaloids are a particular class of indolomonoterpenes most often characterized by an isoquinuclidine nucleus. Their first occurrence was detected in the roots of Tabernanthe iboga, a sacred plant to the people of Gabon, which made it cult object. Ibogaine is the main representative of this class of alkaloids and its psychoactive properties are well documented. It has been proposed as a drug cessation treatment and has a wide range of activities in targeting opioids, cocaine, and alcohol. The purpose of this chapter is to provide a background on this molecule and related compounds and to update knowledge on the most recent advances made. Difficulties linked to the status of ibogaine as a drug in several countries have hampered its development, but 18-methoxycoronaridine is currently under evaluation for the same purposes and for the treatment of leishmaniasis. The chapter is divided into six parts: an introduction aiming at defining what is called an iboga alkaloid, and this is followed by current knowledge on their biosynthesis, which unfortunately remains a "black box" as far as the key construction step is concerned. Many of these alkaloids are still being discovered and the third and fourth parts of the chapter discuss the analytical tools in use for this purpose and give lists of new monomeric and dimeric alkaloids belonging to this class. When necessary, the structures are discussed especially with regard to absolute configuration determinations, which remain a point of weakness in their assignments. Part V gives an account of progress made in the synthesis, partial and total, which the authors believe is key to providing solid solutions to the industrial development of the most promising molecules. The last part of the chapter is devoted to the biological properties of iboga alkaloids, with particular emphasis on ibogaine and 18-methoxycoronaridine.
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Affiliation(s)
- Catherine Lavaud
- Faculty of Pharmacy, Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Case postale 44, UFR des Sciences Exactes et Naturelles, BP 1039, 51687, Reims, Cedex 2, France.
| | - Georges Massiot
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Case postale 44, UFR des Sciences Exactes et Naturelles, BP 1039, 51687, Reims, Cedex 2, France
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Silveira D, de Melo AF, Magalhães P, Fonseca-Bazzo Y. Tabernaemontana Species: Promising Sources of New Useful Drugs. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2017. [DOI: 10.1016/b978-0-444-63929-5.00007-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Paterna A, Gomes SE, Borralho PM, Mulhovo S, Rodrigues CMP, Ferreira MJU. (3'R)-hydroxytabernaelegantine C: A bisindole alkaloid with potent apoptosis inducing activity in colon (HCT116, SW620) and liver (HepG2) cancer cells. JOURNAL OF ETHNOPHARMACOLOGY 2016; 194:236-244. [PMID: 27616029 DOI: 10.1016/j.jep.2016.09.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 09/01/2016] [Accepted: 09/07/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Tabernaemontana elegans Stapf. (Apocynaceae) is a medicinal plant traditionally used in African countries to treat cancer. AIMS OF THE STUDY To discover new apoptosis inducing lead compounds from T. elegans and provide scientific validation of the ethnopharmacological use of this plant. MATERIALS AND METHODS Through fractionation, (3'R)-hydroxytaberanelegantine C (1), a vobasinyl-iboga bisindole alkaloid, was isolated from a cytotoxic alkaloid fraction of the methanol extract of T. elegans roots. Its structure was identified by spectroscopic methods, mainly 1D and 2D NMR experiments. Compound 1 was evaluated for its ability to induce apoptosis in HCT116 and SW620 colon and HepG2 liver carcinoma cells. The cell viability of compound 1 was evaluated by the MTS and lactate dehydrogenase (LDH) assays. Induction of apoptosis was analyzed through Guava ViaCount assay, by flow cytometry, caspase-3/7 activity assays and evaluation of nuclear morphology by Hoechst staining. To determine the molecular pathways elicited by 1 exposure, immunoblot analysis was also performed. RESULTS (3'R)-hydroxytaberanelegantine C (1) displayed strong apoptosis induction activity as compared to 5-fluorouracil (5-FU), the most used anticancer agent in colorectal cancer treatment. In the MTS assay, compound 1 exhibited IC50 values similar or lower than 5-FU in the three cell lines tested. The IC50 value of 1 was also calculated in CCD18co normal human colon fibroblasts. The lactate dehydrogenase assay showed increased LDH release by compound 1, and the Guava ViaCount assay revealed that 1 significantly increased the incidence of apoptosis to a further extent than 5-FU. Moreover, the induction of apoptosis was corroborated by evaluation of nuclear morphology by Hoechst staining and caspase-3/7 activity assays of 1 treated cells. As expected, in immunoblot analysis, compound 1 treatment led to poly(ADP-ribose) polymerase cleavage. This was accompanied by decreased anti-apoptotic proteins Bcl-2 and XIAP steady state levels in all three cancer cell lines tested. CONCLUSIONS Compound 1 showed remarkable induction of apoptosis in HCT116, SW620 and HepG2 cells. Together, the results suggest that compound 1 is a promising lead structure for inducing apoptosis.
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Affiliation(s)
- Angela Paterna
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Sofia E Gomes
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Pedro M Borralho
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Silva Mulhovo
- Centro de Estudos Moçambicanos e de Etnociências (CEMEC), Faculty of Natural Sciences and Mathematics, Pedagogical University, 21402161 Maputo, Mozambique.
| | - Cecília M P Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| | - Maria-José U Ferreira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
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Krengel F, Herrera Santoyo J, Olivera Flores TDJ, Chávez Ávila VM, Pérez Flores FJ, Reyes Chilpa R. Quantification of Anti-Addictive Alkaloids Ibogaine and Voacangine in In Vivo- and In Vitro-Grown Plants of Two Mexican Tabernaemontana Species. Chem Biodivers 2016; 13:1730-1737. [PMID: 27448833 DOI: 10.1002/cbdv.201600146] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 07/05/2016] [Indexed: 11/11/2022]
Abstract
Tabernaemontana alba and Tabernaemontana arborea are Apocynaceae species used in Mexican traditional medicine for which little phytochemical information exists. In this study, preliminary gas chromatography/mass spectrometry analyses of different organs obtained from wild plants of both species identified a total of 10 monoterpenoid indole alkaloids (MIAs) and one simple indole alkaloid, nine of which were reported for the first time in these species. Furthermore, callus cultures were established from T. alba leaf explants and regeneration of whole plants was accomplished via somatic embryogenesis. The anti-addictive MIAs ibogaine and voacangine were then quantified by gas chromatography with flame ionization detection in wild plants of both species, as well as greenhouse-grown plants, in vitro-grown plantlets and embryogenic callus of T. alba. Ibogaine and voacangine were present in most samples taken from the whole plants of both species, with stem and root barks showing the highest concentrations. No alkaloids were detected in callus samples. It was concluded that T. alba and T. arborea are potentially viable sources of ibogaine and voacangine, and that these MIAs can be produced through somatic embryogenesis and whole plant regeneration of T. alba. Approaches to increase MIA yields in whole plants and to achieve alkaloid production directly in cell cultures are discussed.
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Affiliation(s)
- Felix Krengel
- Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México.,Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
| | - Josefina Herrera Santoyo
- Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
| | - Teresa de Jesús Olivera Flores
- Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
| | - Víctor M Chávez Ávila
- Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
| | - Francisco J Pérez Flores
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
| | - Ricardo Reyes Chilpa
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Av. Universidad 3000, Circuito Exterior S/N, Delegación Coyoacán, C.P. 04510, Ciudad Universitaria, Ciudad de México, México
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Nge CE, Sim KS, Lim SH, Thomas NF, Low YY, Kam TS. A Hexacyclic, Iboga-Derived Monoterpenoid Indole with a Contracted Tetrahydroazepine C-Ring and Incorporation of an Isoxazolidine Moiety, a Seco-Corynanthean, an Aspidosperma-Aspidosperma Bisindole with Anticancer Properties, and the Absolute Configuration of the Pyridopyrimidine Indole Alkaloid, Vernavosine. JOURNAL OF NATURAL PRODUCTS 2016; 79:2709-2717. [PMID: 27759387 DOI: 10.1021/acs.jnatprod.6b00674] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Examination of the EtOH extract of the Malayan Tabernaemontana corymbosa resulted in the isolation of three new alkaloids, viz., cononuridine (1), an unusual hexacyclic, iboga-derived, monoterpenoid indole characterized by contraction of the tetrahydroazepine C-ring and incorporation of an additional isoxazolidine ring, taberisidine (2), a seco-corynanthean alkaloid, and conofolidine (3), an Aspidosperma-Aspidosperma bisindole that showed pronounced in vitro growth inhibitory activity against an array of human cancer cell lines, including KB, vincristine-resistant KB, PC-3, LNCaP, MCF7, MDA-MB-231, HT-29, and HCT 116 cells. The structures and absolute configurations of 1 and 3 and the absolute configuration of the novel pyridopyrimidine indole alkaloid vernavosine (4) were confirmed by X-ray diffraction analysis. A reasonable biosynthesis route to cononuridine starting from an iboga precursor is presented.
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Affiliation(s)
- Choy-Eng Nge
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Kae-Shin Sim
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Siew-Huah Lim
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Noel F Thomas
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Yun-Yee Low
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
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Paterna A, Gomes SE, Borralho PM, Mulhovo S, Rodrigues CMP, Ferreira MJU. Vobasinyl-Iboga Alkaloids from Tabernaemontana elegans: Cell Cycle Arrest and Apoptosis-Inducing Activity in HCT116 Colon Cancer Cells. JOURNAL OF NATURAL PRODUCTS 2016; 79:2624-2634. [PMID: 27704811 DOI: 10.1021/acs.jnatprod.6b00552] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Phytochemical investigation of the roots of the African medicinal plant Tabernaemontana elegans led to the isolation of three new (1-3) and two known (4 and 5) bisindole alkaloids of the vobasinyl-iboga type. The structures of 1-3 were assigned by spectroscopic methods, mainly using 1D and 2D NMR experiments. All of the isolated compounds were evaluated for their cytotoxicity against HCT116 colon and HepG2 liver carcinoma cells by the MTS metabolism assay. Compounds 1-3 and 5 were found to be cytotoxic to HCT116 colon cancer cells, displaying IC50 values in the range 8.4 to >10 μM. However, the compounds did not display significant cytotoxicity against HepG2 cancer cells. The cytotoxicity of compounds 1-3 and 5 was corroborated using a lactate dehydrogenase assay. Hoechst staining and nuclear morphology assessment and caspase-3/7 activity assays were also performed for investigating the activity of compounds 1-3 and 5 as apoptosis inducers. The induced inhibition of proliferation of HCT116 cells by compounds 1 and 2 was associated with G1 phase arrest, while compounds 3 and 5 induced G2/M cell cycle arrest. These results showed that the new vobasinyl-iboga alkaloids 1-3 and compound 5 are strong inducers of apoptosis and cell cycle arrest in HCT116 colon cancer cells.
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Affiliation(s)
- Angela Paterna
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Sofia E Gomes
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Pedro M Borralho
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Silva Mulhovo
- Centro de Estudos Moçambicanos e de Etnociências (CEMEC), Faculty of Natural Sciences and Mathematics, Pedagogical University , 21402161 Maputo, Mozambique
| | - Cecília M P Rodrigues
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
| | - Maria-José U Ferreira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , 1649-003 Lisbon, Portugal
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Marinho FF, Simões AO, Barcellos T, Moura S. Brazilian Tabernaemontana genus: Indole alkaloids and phytochemical activities. Fitoterapia 2016; 114:127-137. [PMID: 27639415 DOI: 10.1016/j.fitote.2016.09.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/07/2016] [Accepted: 09/13/2016] [Indexed: 11/19/2022]
Abstract
The Tabernaemontana genus belongs to the family Apocynaceae comprising about 100 species spread throughout tropical and subtropical regions around the world including Brazil, which contains around 40 species spread all over its territory. Because of the territorial space and climate diversity, these species already identified in Brazil are the largest collection of Tabernaemontana, which are representative (about 30%) of worldwide distribution. The monoterpene indole alkaloids present as major secondary components in all parts of the plants of the genus Tabernaemontana, have attracted the attention of the scientific community for new alkaloids derivatives and bioactivities. This review covers relevant references about Tabernaemontana species found in Brazil, its geographical distribution, occurrence of monoterpene alkaloids and phytochemical activities. Additional information about the South American species activities are also reported in this review.
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Affiliation(s)
- Flávio F Marinho
- Laboratory of Biotechnology of Natural and Synthetic Products, Institute of Biotechnology, University of Caxias do Sul, Caxias do Sul, Brazil
| | - André Olmos Simões
- Departamento de Biologia Vegetal, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Thiago Barcellos
- Laboratory of Biotechnology of Natural and Synthetic Products, Institute of Biotechnology, University of Caxias do Sul, Caxias do Sul, Brazil
| | - Sidnei Moura
- Laboratory of Biotechnology of Natural and Synthetic Products, Institute of Biotechnology, University of Caxias do Sul, Caxias do Sul, Brazil.
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Nge CE, Chong KW, Thomas NF, Lim SH, Low YY, Kam TS. Ibogan, Aspidosperman, Vincamine, and Bisindole Alkaloids from a Malayan Tabernaemontana corymbosa: Iboga Alkaloids with C-20α Substitution. JOURNAL OF NATURAL PRODUCTS 2016; 79:1388-1399. [PMID: 27077800 DOI: 10.1021/acs.jnatprod.6b00129] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ten new indole alkaloids (1-10) comprising five ibogan, two aspidosperman, one vincamine, and two bisindole alkaloids, in addition to 32 known alkaloids, were isolated from the stem-bark extract of a Malayan Tabernaemontana corymbosa. The structures of these alkaloids were determined based on analysis of the NMR and MS data and, in five instances (1, 3, 5, 6, 8), confirmed by X-ray diffraction analysis. Two of the iboga alkaloids, conodusines B (2) and C (3), and the iboga-containing bisindole tabernamidine B (10) are notable for the presence of an α-substituted acetyl group at C-20 of the iboga carbon skeleton. The iboga alkaloid (+)-conodusine E (5) had MS and NMR data that were identical to those of (-)-ervatamine I, recently isolated from Ervatamia hainanensis. Establishment of the absolute configuration of (+)-conodusine E (5) was based on analysis of the ECD data, correlation with (-)-heyneanine, and X-ray analysis, which showed that (+)-5 belongs to the same enantiomeric series as exemplified by (-)-coronaridine. The configuration at C-20' of the previously reported Tabernaemontana bisindole alkaloid 19'-oxotabernamine (renamed tabernamidine B) required revision based on the present results. Several of the bisindoles showed pronounced in vitro growth inhibitory activity against drug-sensitive and vincristine-resistant KB cells.
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Affiliation(s)
- Choy-Eng Nge
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Kam-Weng Chong
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Noel F Thomas
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Siew-Huah Lim
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Yun-Yee Low
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
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Abubakar IB, Lim KH, Kam TS, Loh HS. Synergistic cytotoxic effects of combined δ-tocotrienol and jerantinine B on human brain and colon cancers. JOURNAL OF ETHNOPHARMACOLOGY 2016; 184:107-118. [PMID: 26947901 DOI: 10.1016/j.jep.2016.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 02/29/2016] [Accepted: 03/01/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The genus Tabernaemontana has widespread distribution throughout tropical and subtropical parts of the world, i.e. Africa, Asia and America which has long been used for treatments of different disease conditions including tumours, wounds, syphilis, stomach ache and headache. Some Tabernaemontana species are used for treatment of piles, spleen and abdominal tumours in India. In particular, the leaf of Tabernaemontana corymbosa is used for treatment of tumours in Bangladesh. Parts of the plant or whole plants are used as decoctions, steam bath, powder and ointments. AIM OF STUDY The present study was undertaken to study the mechanism of apoptosis induction in human glioblastoma (U87MG) and colorectal adenocarcinoma (HT-29) cancer cells by a novel indole alkaloid, jerantinine B isolated from T. corymbosa, δ-tocotrienol and the combined low-dose treatments of δ-tocotrienol with IC20 dose of jerantinine B. MATERIALS AND METHODS Cell viability, isobologram and combinational index (CI) analyses were used to determine the pharmacological interaction between combined treatments based on the IC50 values obtained. Fluorescence and histochemical staining techniques as well as comet assay were used for evaluating the morphological changes and DNA damage pattern, respectively. The effects of treatments on microtubules, caspase activity and cell death were determined using immunofluorescence technique, caspase colorimetric and neutral red uptake assays, respectively. RESULTS Jerantinine B, δ-tocotrienol and combined low-dose treatments induced a dose-dependent growth inhibition against U87MG and HT-29 cells selectively with less toxicity acted towards the normal MRC5 cells. Synergistic growth inhibition observed with CI values of 0.85 and 0.77 for U87MG and HT-29 cells, resulting in up to 2-fold and 3.8-fold dose reduction of δ-tocotrienol and jerantinine B, respectively. U87MG and HT-29 cells exhibited morphological features of apoptosis and double stranded DNA breaks. Individual and combined treatments induced caspase 8 and 3 activities and cell death independent of caspase activation on U87MG and HT-29 cells. An increased caspase 9 activity was also evident on U87MG and HT-29 treated with combined treatments and HT-29 cells treated with jerantinine B. Jerantinine B and combined low-dose treatments with δ-tocotrienol undoubtedly disrupted the microtubule networks. CONCLUSION The present study demonstrated the mechanism for cytotoxic potency of δ-tocotrienol and jerantinine B against U87MG and HT-29 cells. Furthermore, combined low-dose treatments induced concurrent synergistic inhibition of cancer cell growth with concomitant dose reduction thus minimizing toxicity to normal cells and improving potency of δ-tocotrienol and jerantinine B.
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Affiliation(s)
- Ibrahim Babangida Abubakar
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| | - Kuan-Hon Lim
- School of Pharmacy, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| | - Toh-Seok Kam
- Department of Chemistry, University of Malaya, Jalan Universiti, 50603 Kuala Lumpur, Malaysia.
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia; Biotechnology Research Centre, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
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Sim DSY, Teoh WY, Sim KS, Lim SH, Thomas NF, Low YY, Kam TS. Vobatensines A-F, Cytotoxic Iboga-Vobasine Bisindoles from Tabernaemontana corymbosa. JOURNAL OF NATURAL PRODUCTS 2016; 79:1048-1055. [PMID: 26918761 DOI: 10.1021/acs.jnatprod.5b01117] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Six new bisindole alkaloids of the iboga-vobasine type, vobatensines A-F (1-6), in addition to four known bisindoles (8-11), were isolated from a stem bark extract of a Malayan Tabernaemontana corymbosa. The structures of these alkaloids were determined based on analysis of the spectroscopic data and in the case of vobatensines A (1), B (2), and 16'-decarbomethoxyvoacamine (8) also confirmed by partial syntheses. Nine of these alkaloids (1-5, 8-11) showed pronounced in vitro growth inhibitory activity against human KB, PC-3, LNCaP, HCT 116, HT-29, MCF7, MDA-MB-231, and A549 cancer cells.
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Affiliation(s)
- Dawn Su-Yin Sim
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Wuen-Yew Teoh
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Kae-Shin Sim
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Siew-Huah Lim
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Noel F Thomas
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Yun-Yee Low
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry and ‡Institute of Biological Sciences, University of Malaya , 50603 Kuala Lumpur, Malaysia
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Samanta D, Lahiri K, Mukhopadhyay MJ, Mukhopadhyay S. Cytomorphological analysis and in situ 4C nuclear DNA estimation in species and varieties of Tabernaemontana (fam. Apocynaceae). THE NUCLEUS 2016. [DOI: 10.1007/s13237-016-0166-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Abubakar IB, Loh HS. A review on ethnobotany, pharmacology and phytochemistry of Tabernaemontana corymbosa. ACTA ACUST UNITED AC 2016; 68:423-32. [PMID: 26887962 DOI: 10.1111/jphp.12523] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 01/14/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Tabernaemontana is a genus from the plant family, Apocynaceae with vast medicinal application and widespread distribution in the tropics and subtropics of Africa, Americas and Asia. The objective of this study is to critically evaluate the ethnobotany, medicinal uses, pharmacology and phytochemistry of the species, Tabernaemontana corymbosa (Roxb. ex Wall.) and provide information on the potential future application of alkaloids isolated from different parts of the plant. KEY FINDINGS T. corymbosa (Roxb. ex Wall.) parts are used as poultice, boiled juice, decoctions and infusions for treatment against ulceration, fracture, post-natal recovery, syphilis, fever, tumours and orchitis in Malaysia, China, Thailand and Bangladesh. Studies recorded alkaloids as the predominant phytochemicals in addition to phenols, saponins and sterols with vast bioactivities such as antimicrobial, analgesic, anthelmintic, vasorelaxation, antiviral and cytotoxicity. SUMMARY An evaluation of scientific data and traditional medicine revealed the medicinal uses of different parts of T. corymbosa (Roxb. ex Wall.) across Asia. Future studies exploring the structure-bioactivity relationship of alkaloids such as jerantinine and vincamajicine among others could potentially improve the future application towards reversing anticancer drug resistance.
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Affiliation(s)
- Ibrahim Babangida Abubakar
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia.,Biotechnology Research Centre, The University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia
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