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Reyes CP, Ardiles A, Anaissi-Afonso L, González-Bakker A, Padrón JM, Jiménez IA, Machín F, Bazzocchi IL. Exploring the Anticancer Potential of Phenolic nor-Triterpenes from Celastraceae Species. Int J Mol Sci 2024; 25:9470. [PMID: 39273417 PMCID: PMC11395069 DOI: 10.3390/ijms25179470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Revised: 08/23/2024] [Accepted: 08/28/2024] [Indexed: 09/15/2024] Open
Abstract
To explore new compounds with antitumour activity, fifteen phenolic nor-tripterpenes isolated from Celastraceae species, Maytenus jelskii, Maytenus cuzcoina, and Celastrus vulcanicola, have been studied. Their chemical structures were elucidated through spectroscopic and spectrometric techniques, resulting in the identification of three novel chemical compounds. Evaluation on human tumour cell lines (A549 and SW1573, non-small cell lung; HBL-100 and T-47D, breast; HeLa, cervix, and WiDr, colon) revealed that three compounds, named 6-oxo-pristimerol, demethyl-zeylasteral, and zeylasteral, exhibited significant activity (GI50 ranging from 0.45 to 8.6 µM) on at least five of the cell lines tested. Continuous live cell imaging identified apoptosis as the mode of action of selective cell killing in HeLa cells. Furthermore, their effect on a drug-sensitive Saccharomyces cerevisiae strain has been investigated to deepen on their mechanism of action. In dose-response growth curves, zeylasteral and 7α-hydroxy-blepharodol were markedly active. Additionally, halo assays were conducted to assess the involvement of oxidative stress and/or mitochondrial function in the anticancer profile, ruling out these modes of action for the active compounds. Finally, we also delve into the structure-activity relationship, providing insights into how the molecular structure of these compounds influences their biological activity. This comprehensive analysis enhances our understanding of the therapeutic potential of this triterpene type and underscores its relevance for further research in this field.
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Affiliation(s)
- Carolina P Reyes
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Bioquímica Microbiología, Biología Celular y Genética, Universidad de La Laguna, Av. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
| | - Alejandro Ardiles
- Departamento de Ciencias Básicas, Facultad de Ciencias, Universidad Santo Tomás, Avenida Iquique, Antofagasta 3991, Chile
| | - Laura Anaissi-Afonso
- Unidad de Investigación, Hospital Universitario Ntra Sra de Candelaria, Ctra del Rosario 145, 38010 Santa Cruz de Tenerife, Spain
| | - Aday González-Bakker
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Av. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
| | - José M Padrón
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Av. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
| | - Ignacio A Jiménez
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Av. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
| | - Félix Machín
- Unidad de Investigación, Hospital Universitario Ntra Sra de Candelaria, Ctra del Rosario 145, 38010 Santa Cruz de Tenerife, Spain
- Instituto de Tecnologías Biomédicas, Universidad de La Laguna, 38200 La Laguna, Spain
- Facultad de Ciencias de la Salud, Universidad Fernando Pessoa Canarias, 35450 Las Palmas de Gran Canaria, Spain
| | - Isabel L Bazzocchi
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Av. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
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2
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Quiros-Guerrero LM, Allard PM, Nothias LF, David B, Grondin A, Wolfender JL. Comprehensive mass spectrometric metabolomic profiling of a chemically diverse collection of plants of the Celastraceae family. Sci Data 2024; 11:415. [PMID: 38649352 PMCID: PMC11035674 DOI: 10.1038/s41597-024-03094-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 02/27/2024] [Indexed: 04/25/2024] Open
Abstract
Natural products exhibit interesting structural features and significant biological activities. The discovery of new bioactive molecules is a complex process that requires high-quality metabolite profiling data to properly target the isolation of compounds of interest and enable their complete structural characterization. The same metabolite profiling data can also be used to better understand chemotaxonomic links between species. This Data Descriptor details a dataset resulting from the untargeted liquid chromatography-mass spectrometry metabolite profiling of 76 natural extracts of the Celastraceae family. The spectral annotation results and related chemical and taxonomic metadata are shared, along with proposed examples of data reuse. This data can be further studied by researchers exploring the chemical diversity of natural products. This can serve as a reference sample set for deep metabolome investigation of this chemically rich plant family.
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Affiliation(s)
- Luis-Manuel Quiros-Guerrero
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU, 1211, Geneva, Switzerland.
- School of Pharmaceutical Sciences, University of Geneva, CMU, 1211, Geneva, Switzerland.
| | | | - Louis-Felix Nothias
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU, 1211, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, CMU, 1211, Geneva, Switzerland
| | - Bruno David
- Green Mission Department, Herbal Products Laboratory, Pierre Fabre Research Institute, Toulouse, France
| | - Antonio Grondin
- Green Mission Department, Herbal Products Laboratory, Pierre Fabre Research Institute, Toulouse, France
| | - Jean-Luc Wolfender
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, CMU, 1211, Geneva, Switzerland.
- School of Pharmaceutical Sciences, University of Geneva, CMU, 1211, Geneva, Switzerland.
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Quiros-Guerrero LM, Nothias LF, Gaudry A, Marcourt L, Allard PM, Rutz A, David B, Queiroz EF, Wolfender JL. Inventa: A computational tool to discover structural novelty in natural extracts libraries. Front Mol Biosci 2022; 9:1028334. [PMID: 36438653 PMCID: PMC9692083 DOI: 10.3389/fmolb.2022.1028334] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/18/2022] [Indexed: 09/05/2023] Open
Abstract
Collections of natural extracts hold potential for the discovery of novel natural products with original modes of action. The prioritization of extracts from collections remains challenging due to the lack of a workflow that combines multiple-source information to facilitate the data interpretation. Results from different analytical techniques and literature reports need to be organized, processed, and interpreted to enable optimal decision-making for extracts prioritization. Here, we introduce Inventa, a computational tool that highlights the structural novelty potential within extracts, considering untargeted mass spectrometry data, spectral annotation, and literature reports. Based on this information, Inventa calculates multiple scores that inform their structural potential. Thus, Inventa has the potential to accelerate new natural products discovery. Inventa was applied to a set of plants from the Celastraceae family as a proof of concept. The Pristimera indica (Willd.) A.C.Sm roots extract was highlighted as a promising source of potentially novel compounds. Its phytochemical investigation resulted in the isolation and de novo characterization of thirteen new dihydro-β-agarofuran sesquiterpenes, five of them presenting a new 9-oxodihydro-β-agarofuran base scaffold.
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Affiliation(s)
- Luis-Manuel Quiros-Guerrero
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Louis-Félix Nothias
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Arnaud Gaudry
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Laurence Marcourt
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Pierre-Marie Allard
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Adriano Rutz
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Bruno David
- Green Mission Pierre Fabre, Institut de Recherche Pierre Fabre, Toulouse, France
| | - Emerson Ferreira Queiroz
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
| | - Jean-Luc Wolfender
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, Geneva, Switzerland
- School of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
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Happi GM, Ntabo VK, Tcho AT, Wansi JD. Naturally occurring dimeric triterpenoids: Occurrence, chemistry and bioactivities. PHYTOCHEMISTRY 2022; 200:113242. [PMID: 35594948 DOI: 10.1016/j.phytochem.2022.113242] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
The triterpenes represent one of the most reported subclasses of specialized metabolites from the plant kingdom. They play a key role in the protection of plants and their metabolism in addition to displaying a high structural diversity and large scale of biological activities. The scaffold can undergo several reactions like oxidation or substitution at different positions of the skeleton leading to the formation of several types of compounds. More specifically, triterpene dimer is a small group of compounds found in nature (from plants precisely). Until 2021, the chemical and pharmacological works reported in the literature indicated the identification of 90 natural dimeric triterpenes and 11 synthetic derivatives from 19 plants species and very few of them have been biologically evaluated for their antibacterial, antioxidant, antiproliferative or molluscicide activities. This review aims to compile the literature on the occurrence, chemistry and biological activities of the triterpenoid dimers. To attend this goal, a literature survey has been done in a number of online libraries including Scifinder, PubMed, Web of Science and Google Scholar using keywords terpene, triterpene, dimer, celastroloid without language restriction. This paper provides the easiest access to the information on triterpene dimers for readers and researchers in view to enhancing the continuity of research works on this topic.
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Affiliation(s)
- Gervais Mouthé Happi
- Department of Chemistry, Higher Teacher Training College, The University of Bamenda, P.O Box 39, Bambili, Cameroon.
| | - Virginia Kien Ntabo
- Department of Chemistry, Higher Teacher Training College, The University of Bamenda, P.O Box 39, Bambili, Cameroon
| | - Alain Tadjong Tcho
- Department of Chemistry, Faculty of Sciences, University of Buea, P.O. Box 63, Buea, Cameroon
| | - Jean Duplex Wansi
- Department of Chemistry, Faculty of Sciences, University of Douala, P. O. Box 24157, Douala, Cameroon
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5
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Inácio MC, Paz TA, Wijeratne EMK, Gunaherath GMKB, Guido RVC, Gunatilaka AAL. Antimicrobial activity of some celastroloids and their derivatives. Med Chem Res 2022. [DOI: 10.1007/s00044-022-02927-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Soto-Maldonado C, Fernandez-Araya B, Saavedra-Sanchez V, Santis-Bernal J, Alcaino-Fuentes L, Arancibia-Diaz A, Zuniga-Hansen ME. Antioxidant and antimicrobial capacity of Maytenus boaria leaves, recovery by infusion and solvent extraction. ELECTRON J BIOTECHN 2022. [DOI: 10.1016/j.ejbt.2022.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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7
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Camargo KC, de Aguilar MG, Moraes ARA, de Castro RG, Szczerbowski D, Miguel ELM, Oliveira LR, Sousa GF, Vidal DM, Duarte LP. Pentacyclic Triterpenoids Isolated from Celastraceae: A Focus in the 13C-NMR Data. Molecules 2022; 27:molecules27030959. [PMID: 35164224 PMCID: PMC8838773 DOI: 10.3390/molecules27030959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 12/10/2022] Open
Abstract
The Celastraceae family comprises about 96 genera and more than 1.350 species, occurring mainly in tropical and subtropical regions of the world. The species of this family stand out as important plant sources of triterpenes, both in terms of abundance and structural diversity. Triterpenoids found in Celastraceae species display mainly lupane, ursane, oleanane, and friedelane skeletons, exhibiting a wide range of biological activities such as antiviral, antimicrobial, analgesic, anti-inflammatory, and cytotoxic against various tumor cell lines. This review aimed to document all triterpenes isolated from different botanical parts of species of the Celastraceae family covering 2001 to 2021. Furthermore, a compilation of their 13C-NMR data was carried out to help characterize compounds in future investigations. A total of 504 pentacyclic triterpenes were compiled and distinguished as 29 aromatic, 50 dimers, 103 friedelanes, 89 lupanes, 102 oleananes, 22 quinonemethides, 88 ursanes and 21 classified as others.
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Affiliation(s)
| | | | | | | | | | | | | | - Grasiely Faria Sousa
- Correspondence: (G.F.S.); (D.M.V.); (L.P.D.);Tel.: +55-31-3409-5728 (G.F.S.); +55-31-3409-5750 (D.M.V.); +55-31-3409-5722 (L.P.D.)
| | - Diogo Montes Vidal
- Correspondence: (G.F.S.); (D.M.V.); (L.P.D.);Tel.: +55-31-3409-5728 (G.F.S.); +55-31-3409-5750 (D.M.V.); +55-31-3409-5722 (L.P.D.)
| | - Lucienir Pains Duarte
- Correspondence: (G.F.S.); (D.M.V.); (L.P.D.);Tel.: +55-31-3409-5728 (G.F.S.); +55-31-3409-5750 (D.M.V.); +55-31-3409-5722 (L.P.D.)
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8
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Ye HL, Liu Y, Pan J, Guan W, Liu Y, Li XM, Wang SY, Algradi AM, Yang BY, Kuang HX. Three new sesquiterpenoid alkaloids from the roots of Tripterygium wilfordii and its cytotoxicity. Nat Prod Res 2021; 36:3979-3987. [PMID: 33769155 DOI: 10.1080/14786419.2021.1903460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Three new sesquiterpenoid alkaloids, cangorin K (1), dimacroregelines C (2) and D (3), as well as two known sesquiterpenoids (4-5), were isolated from the roots of Tripterygium wilfordii Hook. f. The structures of new compounds were characterised by extensive 1D and 2D NMR spectroscopic analyses, as well as HRESIMS data, and the known compounds were established by 1 D NMR spectra referring to the literatures. Cytotoxicity evaluation of these compounds against two human tumour lines (SMMC7721, LN229) was investigated by CCK-8 assay and displayed that compounds 1-4 showed potent cytotoxicity against SMMC7721 cell with IC50 value in the range of 0.26-9.67 μΜ and compounds 1-5 showed potent cytotoxicity against LN-229 cell with IC50 values in the range of 0.50-7.38 μΜ.
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Affiliation(s)
- Hong Liang Ye
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Yan Liu
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Juan Pan
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Wei Guan
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Yuan Liu
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Xiao Mao Li
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Si Yi Wang
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Adnan Mohammed Algradi
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Bing You Yang
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
| | - Hai Xue Kuang
- Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, People's Republic of China
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9
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Padilla-Montaño N, de León Guerra L, Moujir L. Antimicrobial Activity and Mode of Action of Celastrol, a Nortriterpen Quinone Isolated from Natural Sources. Foods 2021; 10:foods10030591. [PMID: 33799720 PMCID: PMC7998816 DOI: 10.3390/foods10030591] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/05/2021] [Accepted: 03/05/2021] [Indexed: 01/07/2023] Open
Abstract
Species of the Celastraceae family are traditionally consumed in different world regions for their stimulating properties. Celastrol, a triterpene methylene quinone isolated from plants of celastraceas, specifically activates satiety centers in the brain that play an important role in controlling body weight. In this work, the antimicrobial activity and mechanism of action of celastrol and a natural derivative, pristimerin, were investigated in Bacillus subtilis. Celastrol showed a higher antimicrobial activity compared with pristimerin, being active against Gram-positive bacteria with minimum inhibitory concentrations (MICs) that ranged between 0.16 and 2.5 µg/mL. Killing curves displayed a bactericidal effect that was dependent on the inoculum size. Monitoring of macromolecular synthesis in bacterial populations treated with these compounds revealed inhibition in the incorporation of all radiolabeled precursors, but not simultaneously. Celastrol at 3 µg/mL and pristimerin at 10 µg/mL affected DNA and RNA synthesis first, followed by protein synthesis, although the inhibitory action on the uptake of radiolabeled precursors was more dramatic with celastrol. This compound also caused cytoplasmic membrane disruption observed by potassium leakage and formation of mesosome-like structures. The inhibition of oxygen consumption of whole and disrupted cells after treatments with both quinones indicates damage in the cellular structure, suggesting the cytoplasmic membrane as a potential target. These findings indicate that celastrol could be considered as an interesting alternative to control outbreaks caused by spore-forming bacteria.
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10
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Ruiz-Riaguas A, Fernández-de Córdova ML, Llorent-Martínez EJ. Phenolic profile and antioxidant activity of Euonymus japonicus Thunb. Nat Prod Res 2020; 36:3445-3449. [PMID: 33283539 DOI: 10.1080/14786419.2020.1855641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The aim of this study was to characterise the phenolic profile and evaluate the antioxidant activity of aqueous and methanol leaf extracts from Euonymus japonicus Thunb., a species of flowering plant in the Celastraceae family. Liquid chromatography (HPLC) with diode array and electrospray-tandem mass spectrometry (DAD-ESI-MSn) detection was used to characterise and quantify phenolic compounds. Thirty-two compounds were detected; among them, flavonoids (mainly quercetin and kaempferol glycosides) were the most abundant compounds in both extracts. The results obtained for DPPH and ABTS assays in the extracts were in agreement with the highest content of phenolics in the methanol extract.
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Affiliation(s)
- Alba Ruiz-Riaguas
- Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
| | - M L Fernández-de Córdova
- Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
| | - Eulogio J Llorent-Martínez
- Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, Jaén, Spain
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11
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Potential anti-neuroinflammatory compounds from Australian plants - A review. Neurochem Int 2020; 142:104897. [PMID: 33186611 DOI: 10.1016/j.neuint.2020.104897] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/26/2020] [Accepted: 11/02/2020] [Indexed: 12/23/2022]
Abstract
Neuroinflammation is a complex response to brain injury involving the activation of glia, release of inflammatory mediators, such as cytokines and chemokines, and generation of reactive oxygen and nitrogen species. Even though it is considered an event secondary to neuronal death or dysfunction, neuro-inflammation comprises a majority of the non-neuronal contributors to the cause and progression of neurodegenerative diseases like Alzheimer's Disease (AD), Parkinson's Disease (PD), Multiple Sclerosis (MS), Chronic Traumatic Encephalopathy (CTE) and others. As a result of the lack of effectiveness of current treatments for neurodegenerative diseases, neuroinflammation has become a legitimate therapeutic target for drug discovery, leading to the study of various in vivo and in vitro models of neuroinflammation. Several molecules sourced from plants have displayed anti-inflammatory properties in the study of neurodegenerative diseases. A group of these anti-inflammatory compounds has been classified as cytokine-suppressive anti-inflammatory drugs (CSAIDs), which target the pro-inflammatory AP1 and nuclear factor-κB signaling pathways and inhibit the expression of many pro-inflammatory cytokines, such as interleukin IL-1, IL-6, TNF-α, or nitric oxide. Australian plants, thriving amid the driest inhabited continent of the world, are an untapped source of chemical diversity in the form of secondary metabolites. These compounds are produced in response to biotic and abiotic stresses that the plants are exposed to in the highly biodiverse environment. This review is an attempt to highlight anti-inflammatory compounds isolated from Australian plants.
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12
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Structural Requirements for Antimicrobial Activity of Phenolic Nor-Triterpenes from Celastraceae Species. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9152957] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The emergence of pathogenic bacteria-resistant strains is a major public health issue. In this regard, natural product scaffolds offer a promising source of new antimicrobial drugs. In the present study, we report the antimicrobial activity against Gram-positive and Gram-negative bacteria and the yeast Candida albicans of five phenolic nor-triterpenes (1–5) isolated from Maytenus blepharodes and Maytenus canariensis in addition to four derivatives (6–9), three of them reported for the first time. Their stereostructures have been elucidated on the basis of spectroscopic analysis, including one-dimensional (1D) and two-dimensional (2D) NMR techniques, spectrometric methods, and comparison with data reported in the literature. To understand the structural basis for the antimicrobial activity of this type of compounds, we have performed an in-depth study of the structure–activity relationship (SAR) of a series of previously reported phenolic nor-triterpenes. The SAR analysis was based on the skeleton framework, oxidation degree, functional groups, and regiosubstitution patterns, revealing that these aspects modulate the antimicrobial activity.
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Araujo-León JA, Cantillo-Ciau Z, Ruiz-Ciau DV, Coral-Martínez TI. HPLC profile and simultaneous quantitative analysis of tingenone and pristimerin in four Celastraceae species using HPLC-UV-DAD-MS. REVISTA BRASILEIRA DE FARMACOGNOSIA 2019. [DOI: 10.1016/j.bjp.2018.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Callies O, Núñez MJ, Perestelo NR, Reyes CP, Torres-Romero D, Jiménez IA, Bazzocchi IL. Distinct sesquiterpene pyridine alkaloids from in Salvadoran and Peruvian Celastraceae species. PHYTOCHEMISTRY 2017; 142:21-29. [PMID: 28666142 DOI: 10.1016/j.phytochem.2017.06.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/21/2017] [Accepted: 06/23/2017] [Indexed: 06/07/2023]
Abstract
As part of a bioprospecting program aimed at the discovery of undescribed natural products from Salvadoran and Peruvian flora, the phytochemical investigations of four Celastraceae species, Celastrus vulcanicola, Maytenus segoviarum, Maytenus jeslkii, and Maytenus cuzcoina, were performed. The current study reports the isolation and structural characterization of five previously undescribed macrolide sesquiterpene pyridine alkaloids, named vulcanicoline-A, cuzcoinine, vulcanicoline-B, jelskiine, and vulcanicoline-C, along with sixteen known alkaloids. The structures of the alkaloids were established by spectrometric and extensive 1D and 2D NMR spectroscopic analysis, including COSY, HSQC, HMBC, and ROESY experiments. The absolute configurations of alkaloids were proposed based on optical rotation sign, and biogenetic considerations. This study represents the first phytochemical analysis of Maytenus segoviarum.
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Affiliation(s)
- Oliver Callies
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
| | - Marvin J Núñez
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain; Laboratorio de Investigación en Productos Naturales, Facultad de Química y Farmacia, Universidad de El Salvador, Final de Avenida Mártires y Héroes del 30 de Julio, San Salvador, El Salvador
| | - Nayra R Perestelo
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
| | - Carolina P Reyes
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
| | - David Torres-Romero
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain; Departamento de Bioquímica y Contaminación Ambiental, Facultad de Química y Farmacia, Universidad de El Salvador, Final de Avenida Mártires y Héroes del 30 de Julio, San Salvador, El Salvador
| | - Ignacio A Jiménez
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
| | - Isabel L Bazzocchi
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain.
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Veloso CC, Soares GL, Perez AC, Rodrigues VG, Silva FC. Pharmacological potential of Maytenus species and isolated constituents, especially tingenone, for treatment of painful inflammatory diseases. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2017. [DOI: 10.1016/j.bjp.2017.02.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Touré S, Nirma C, Falkowski M, Dusfour I, Boulogne I, Jahn-Oyac A, Coke M, Azam D, Girod R, Moriou C, Odonne G, Stien D, Houël E, Eparvier V. Aedes aegypti Larvicidal Sesquiterpene Alkaloids from Maytenus oblongata. JOURNAL OF NATURAL PRODUCTS 2017; 80:384-390. [PMID: 28186749 DOI: 10.1021/acs.jnatprod.6b00850] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Four new sesquiterpene alkaloids (1-4) with a β-dihydroagrofuran skeleton and a new triterpenoid (5) were isolated from an ethyl acetate extract of Maytenus oblongata stems. Their structures were elucidated using 1D and 2D NMR spectroscopy as well as MS and ECD experiments. The M. oblongata stem EtOAc extract and the pure compounds isolated were tested for larvicidal activity against Aedes aegypti under laboratory conditions, and compounds 2 and 3 were found to be active.
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Affiliation(s)
- Seindé Touré
- CNRS, Institut de Chimie des Substances Naturelles , 91198 Gif-sur-Yvette, France
| | - Charlotte Nirma
- CNRS, Institut de Chimie des Substances Naturelles , 91198 Gif-sur-Yvette, France
| | - Michael Falkowski
- CNRS, UMR EcoFoG, AgroParisTech, Cirad, INRA, Université des Antilles, Université de Guyane , 97300 Cayenne, France
| | - Isabelle Dusfour
- Unité de Contrôle et Adaptation des Vecteurs, Institut Pasteur de la Guyane , 97306 Cayenne, France
| | - Isabelle Boulogne
- CNRS, UMR EcoFoG, AgroParisTech, Cirad, INRA, Université des Antilles, Université de Guyane , 97300 Cayenne, France
- UPRES-EA 4358 GlycoMev (Glycobiologie et Matrice Extracellulaire Végétale), Université de Rouen , 76821 Mont-Saint-Aignan, France
| | - Arnaud Jahn-Oyac
- CNRS, UMR EcoFoG, AgroParisTech, Cirad, INRA, Université des Antilles, Université de Guyane , 97300 Cayenne, France
| | - Maïra Coke
- Unité Expérimentale d'Ecologie et d'Ecotoxicologie Aquatique, INRA-U3E , 35042 Rennes, France
| | - Didier Azam
- Unité Expérimentale d'Ecologie et d'Ecotoxicologie Aquatique, INRA-U3E , 35042 Rennes, France
| | - Romain Girod
- Unité de Contrôle et Adaptation des Vecteurs, Institut Pasteur de la Guyane , 97306 Cayenne, France
| | - Céline Moriou
- CNRS, Institut de Chimie des Substances Naturelles , 91198 Gif-sur-Yvette, France
| | - Guillaume Odonne
- Laboratoire Ecologie, Evolution, Interactions des Systèmes Amazoniens (LEEISA), CNRS, Université de Guyane, IFREMER , 97300 Cayenne, France
| | - Didier Stien
- CNRS, Institut de Chimie des Substances Naturelles , 91198 Gif-sur-Yvette, France
- Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM), Sorbonne Universités, UPMC Univ. Paris 06, CNRS , Observatoire Océanologique, 66650 Banyuls-sur-Mer, France
| | - Emeline Houël
- CNRS, UMR EcoFoG, AgroParisTech, Cirad, INRA, Université des Antilles, Université de Guyane , 97300 Cayenne, France
| | - Véronique Eparvier
- CNRS, Institut de Chimie des Substances Naturelles , 91198 Gif-sur-Yvette, France
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Dimacrolide Sesquiterpene Pyridine Alkaloids from the Stems of Tripterygium regelii. Molecules 2016; 21:molecules21091146. [PMID: 27589701 PMCID: PMC6273108 DOI: 10.3390/molecules21091146] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 08/03/2016] [Indexed: 02/07/2023] Open
Abstract
Two new dimacrolide sesquiterpene pyridine alkaloids (DMSPAs), dimacroregelines A (1) and B (2), were isolated from the stems of Tripterygium regelii. The structures of both compounds were characterized by extensive 1D and 2D NMR spectroscopic analyses, as well as HRESIMS data. Compounds 1 and 2 are two rare DMSPAs possessing unique 2-(3′-carboxybutyl)-3-furanoic acid units forming the second macrocyclic ring, representing the first example of DMSPAs bearing an extra furan ring in their second macrocyclic ring system. Compound 2 showed inhibitory effects on the proliferation of human rheumatoid arthritis synovial fibroblast cell (MH7A) at a concentration of 20 μM.
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Wibowo M, Levrier C, Sadowski MC, Nelson CC, Wang Q, Holst J, Healy PC, Hofmann A, Davis RA. Bioactive Dihydro-β-agarofuran Sesquiterpenoids from the Australian Rainforest Plant Maytenus bilocularis. JOURNAL OF NATURAL PRODUCTS 2016; 79:1445-1453. [PMID: 27120798 DOI: 10.1021/acs.jnatprod.6b00190] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Chemical investigations of the CH2Cl2 extract obtained from the leaves of the Australian rainforest tree Maytenus bilocularis afforded three new dihydro-β-agarofurans, bilocularins A-C (1-3), and six known congeners, namely, celastrine A (4), 1α,6β,8α-triacetoxy-9α-benzoyloxydihydro-β-agarofuran (5), 1α,6β-diacetoxy-9α-benzoyloxy-8α-hydroxydihydro-β-agarofuran (6), Ejap-10 (11), 1α,6β-diacetoxy-9β-benzoyloxydihydro-β-agarofuran (12), and Ejap-2 (13). The major compound 1 was used in semisynthetic studies to afford four ester derivatives (7-10). The chemical structures of 1-3 were elucidated following analysis of 1D/2D NMR and MS data. The absolute configurations of bilocularins A (1) and B (2) were determined by single-crystal X-ray diffraction analysis. All compounds were evaluated for cytotoxic activity against the human prostate cancer cell line LNCaP; none of the compounds were active. However, several compounds showed similar potency to the drug efflux pump inhibitor verapamil in reversing the drug resistance of the human leukemia CEM/VCR R cell line. In addition, similar to verapamil, compound 5 was found to inhibit leucine uptake in LNCaP cells (IC50 = 15.5 μM), which was more potent than the leucine analogue 2-aminobicyclo[2.2.1]heptane-2-carbocyclic acid. This is the first report of secondary metabolites from Maytenus bilocularis.
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Affiliation(s)
- Mario Wibowo
- Eskitis Institute for Drug Discovery, Griffith University , Brisbane, QLD 4111, Australia
| | - Claire Levrier
- Eskitis Institute for Drug Discovery, Griffith University , Brisbane, QLD 4111, Australia
- Australian Prostate Cancer Research Centre-Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute , Brisbane, QLD 4102, Australia
| | - Martin C Sadowski
- Australian Prostate Cancer Research Centre-Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute , Brisbane, QLD 4102, Australia
| | - Colleen C Nelson
- Australian Prostate Cancer Research Centre-Queensland, Institute of Health and Biomedical Innovation, Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute , Brisbane, QLD 4102, Australia
| | - Qian Wang
- Origins of Cancer Program, Centenary Institute, University of Sydney , Camperdown, NSW 2050, Australia
- Sydney Medical School, University of Sydney , Sydney, NSW 2006, Australia
| | - Jeff Holst
- Origins of Cancer Program, Centenary Institute, University of Sydney , Camperdown, NSW 2050, Australia
- Sydney Medical School, University of Sydney , Sydney, NSW 2006, Australia
| | - Peter C Healy
- School of Natural Sciences, Griffith University , Brisbane, QLD 4111, Australia
| | - Andreas Hofmann
- Eskitis Institute for Drug Discovery, Griffith University , Brisbane, QLD 4111, Australia
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Rohan A Davis
- Eskitis Institute for Drug Discovery, Griffith University , Brisbane, QLD 4111, Australia
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Mokoka TA, McGaw LJ, Mdee LK, Bagla VP, Iwalewa EO, Eloff JN. Antimicrobial activity and cytotoxicity of triterpenes isolated from leaves of Maytenus undata (Celastraceae). Altern Ther Health Med 2013; 13:111. [PMID: 23688235 PMCID: PMC3711988 DOI: 10.1186/1472-6882-13-111] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 05/14/2013] [Indexed: 11/24/2022]
Abstract
Background Plants of the genus Maytenus belong to the family Celastraceae and are widely used in folk medicine as anti-tumour, anti-asthmatic, analgesic, anti-inflammatory, antimicrobial and anti-ulcer agents, and as a treatment for stomach problems. The aim of this study was to isolate and identify active compounds with antifungal activity from Maytenus undata after a preliminary study highlighted promising activity in crude extracts. Methods Sequential extracts of M. undata leaves prepared using hexane, dichloromethane (DCM), acetone and methanol (MeOH) were tested for activity against Cryptococcus neoformans, a fungal organism implicated in opportunistic infections. Bioassay-guided fractionation of the hexane extract using C. neoformans as test organism was carried out to isolate antifungal compounds. The cytotoxicity of compounds isolated in sufficient quantities was evaluated using a tetrazolium-based colorimetric cellular assay (MTT) and a haemagglutination assay (HA). Results The hexane extract was most active with an MIC of 20 μg/ml against C. neoformans. The triterpene compounds friedelin (1), epifriedelanol (2), taraxerol (3), 3-oxo-11α-methoxyolean-12-ene-30-oic acid (4), 3-oxo-11α-hydroxyolean-12-ene-30-oic acid (5) and 3,11-dihydroxyolean-12-ene-30-oic acid (6) were isolated. Compound 6 was isolated for the first time from a plant species. The antimicrobial activity of compounds 1, 3, 5 and 6 was determined against a range of bacteria and fungi implicated in opportunistic and nosocomial infections. Compounds 5 and 6 were the most active against all the tested microorganisms with MIC values ranging between 24 and 63 μg/ml, except against Staphylococcus aureus which was relatively resistant. Compounds 1 and 3 had a low toxicity with an LC50 > 200 μg/ml towards Vero cells in the MTT assay. Compounds 5 and 6 were toxic with LC50 values of 6.03±0.02 and 2.98±0.01 μg/ml, respectively. Compounds 1 and 3 similarly were not toxic to the red blood cells (RBCs) but compounds 5 and 6 were toxic, showing HA titer values of 1.33 and 0.67 respectively. Conclusions Compounds 5 and 6 were the most active but were also relatively cytotoxic to monkey kidney cells and red blood cells, while the other isolated compounds were less active and less cytotoxic.
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Santos VAFFM, Regasini LO, Nogueira CR, Passerini GD, Martinez I, Bolzani VS, Graminha MAS, Cicarelli RMB, Furlan M. Antiprotozoal sesquiterpene pyridine alkaloids from Maytenus ilicifolia. JOURNAL OF NATURAL PRODUCTS 2012; 75:991-995. [PMID: 22559947 DOI: 10.1021/np300077r] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
As part of a bioprospecting program aimed at the discovery of antiprotozoal agents from the Brazilian flora, two new sesquiterpene pyridine alkaloids, ilicifoliunines A (1) and B (2), along with the known alkaloids aquifoliunine E-I (3) and mayteine (4), were isolated from the root bark of Maytenus ilicifolia. The structures of 1 and 2 were established on the basis of spectroscopic data interpretation. Alkaloid 3 displayed potent in vitro antiprotozoal activity against Leishmania chagasi and Trypanosoma cruzi, with IC(50) values of 1.4 and 41.9 μM, respectively, as well as low cytotoxicity against murine peritoneal macrophages (IC(50) of 1.8 mM).
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Affiliation(s)
- Vânia A F F M Santos
- Departamento de Química Orgânica, Instituto de Química, Universidade Estadual Paulista (UNESP), Araraquara, SP 14800-900, Brazil.
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21
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Perestelo NR, Jiménez IA, Tokuda H, Hayashi H, Bazzocchi IL. Sesquiterpenes from Maytenus jelskii as potential cancer chemopreventive agents. JOURNAL OF NATURAL PRODUCTS 2010; 73:127-132. [PMID: 20146433 DOI: 10.1021/np900476a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Seven new (1-4 and 7-9) sesquiterpenes with a dihydro-beta-agarofuran skeleton, along with four known compounds (5, 6, 10, and 11), have been isolated from the leaves of Maytenus jelskii. The structures of the new compounds were elucidated by means of spectroscopic data analysis, including 1D and 2D NMR techniques, and their absolute configurations were determined by circular dichroism and chemical correlations. The compounds have been tested for their inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA). Compound 10 was found to be an effective antitumor-promoting agent and also showed a potent chemopreventive effect in an in vivo two-stage carcinogenesis model.
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Affiliation(s)
- Nayra R Perestelo
- Instituto Universitario de Bio-Organica Antonio Gonzalez, Universidad de La Laguna, Avenida Astrofisico Francisco Sanchez 2, La Laguna, 38206 Tenerife, Canary Islands, Spain
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de León L, Moujir L. Activity and mechanism of the action of zeylasterone against Bacillus subtilis. J Appl Microbiol 2007; 104:1266-74. [PMID: 18070038 DOI: 10.1111/j.1365-2672.2007.03663.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To investigate the antimicrobial properties of 6-oxophenolic triterpenoids isolated from Maytenus blepharodes against different micro-organisms and the mode of action on Bacillus subtilis. METHODS AND RESULTS The activity of zeylasterone and demethylzeylasterone was evaluated by microdilution method. Zeylasterone showed a higher activity, being active against Gram-positive bacteria (minimum inhibitory concentration 3-20 microg ml(-1)) and Candida albicans (10 microg ml(-1)). Killing curves revealed a bacteriostatic effect on B. subtilis that was dependent on the growth phase and inoculum size. Zeylasterone caused cell membrane alterations in B. subtilis, as shown by potassium leakage and formation of mesosome-like structures. However, membrane disruption was not revealed by either LIVE/DEAD Baclight assay or measurement of intracellular constituent efflux. Zeylasterone showed an early effect on N-acetyl-glucosamine and uridine incorporation and later on that of thymidine and leucine. CONCLUSIONS Diverse micro-organisms exhibit sensitivities towards compounds studied. The permeability changes in the cytoplasmic membrane and nonsimultaneous ceasing of macromolecular synthesis suggest that zeylasterone could act on multiple targets on B. subtilis. SIGNIFICANCE AND IMPACT OF THE STUDY The activity showed against B. subtilis as a model of spore-forming bacteria would provide valuable information for further studies in the development of 6-oxophenolic triterpenoids as antiseptic and disinfectant properties.
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Affiliation(s)
- L de León
- Departamento de Microbiología y Biología Celular, Facultad de Farmacia, Universidad de La Laguna, Canary Islands, Spain
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Torpocco V, Chávez H, Estévez-Braun A, Ravelo AG. New dammarane triterpenes from Maytenus macrocarpa. Chem Pharm Bull (Tokyo) 2007; 55:812-4. [PMID: 17473476 DOI: 10.1248/cpb.55.812] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two new dammarane triterpenes have been isolated from the stem bark exudates of Maytenus macrocarpa. Their structures were determined by extensive 1D and 2D NMR spectroscopic studies as 24(Z)-3-oxodammara-20(21),24-dien-27-oic acid (1) and octa-nor-13-hydroxydammara-1-en-3,17-dione (2). These compounds were tested for antitumoral activity.
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Affiliation(s)
- Virginia Torpocco
- Instituto Universitario de Bio-Orgánica Antonio González, Avda, Astrofísico Francisco Sánchez No2, La Laguna, 38206 Tenerife, Spain
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Spivey AC, Shukla L, Hayler JF. Conjugate addition of 2- and 4-pyridylcuprates: an expeditious asymmetric synthesis of natural (-)-evoninic acid. Org Lett 2007; 9:891-4. [PMID: 17288430 DOI: 10.1021/ol070011y] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The scope and limitations of the conjugate addition of 2- and the first 4-pyridyl Gilman homocuprates to various alpha,beta-unsaturated Michael acceptors are delineated. The conjugate addition of the cuprate of 2-bromo-3-methylpyridine to (E)-methyl crotonate then diastereoselective enolate alkylation and lipase-mediated enantioselective ester hydrolysis have enabled an efficient four-step first asymmetric synthesis of the Celastraceae sesquiterpenoid esterifying ligand (-)-(1'S,2'S)-evoninic acid.
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Affiliation(s)
- Alan C Spivey
- Department of Chemistry, Imperial College, London, SW7 2AY, U.K.
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Núñez MJ, Reyes CP, Jiménez IA, Moujir L, Bazzocchi IL. Lupane triterpenoids from Maytenus species. JOURNAL OF NATURAL PRODUCTS 2005; 68:1018-21. [PMID: 16038541 DOI: 10.1021/np058016w] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Five new lupane triterpenes (1-5), in addition to 24 known ones, were isolated from Maytenus cuzcoina and M. chiapensis. Their structures were elucidated on the basis of spectroscopic analysis, including homonuclear and heteronuclear correlation NMR (COSY, ROESY, HSQC, and HMBC) experiments. The compounds were assayed for antimicrobial and cytotoxic activities, with 3-epi-betulinic acid and 28,30-dihydroxy-3-oxolup-20(29)-ene showing moderate cytotoxicity.
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Affiliation(s)
- Marvin J Núñez
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, and Instituto Canario de Investigación del Cáncer, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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New phenolic triterpenes from Maytenus blepharodes. Semisynthesis of 6-deoxoblepharodol from pristimerin. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.12.046] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Núñez MJ, Guadaño A, Jiménez IA, Ravelo AG, González-Coloma A, Bazzocchi IL. Insecticidal sesquiterpene pyridine alkaloids from Maytenus chiapensis. JOURNAL OF NATURAL PRODUCTS 2004; 67:14-18. [PMID: 14738378 DOI: 10.1021/np030347q] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The new sesquiterpene pyridine alkaloids chiapenines ES-I (1), ES-II (2), ES-III (3), and ES-IV (4), in addition to the known alkaloids wilfordine (5), alatamine (6), wilforidine (7), alatusinine (8), euonine (9), euonymine (10), ebenifoline E-I (11), forrestine (12), mayteine (13), and 4-hydroxy-7-epi-chuchuhuanine E-V (14), were isolated from the leaves of Maytenus chiapensis. Their structures were elucidated by 1D and 2D NMR spectroscopy, including homonuclear and heteronuclear correlation (COSY, ROESY, HSQC, and HMBC) experiments. Wilfordine, alatusinine, and euonine exhibited strong antifeedant activity against Spodoptera littoralis.
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Affiliation(s)
- Marvin J Núñez
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Canary Islands, Spain
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Jiménez IA, Bazzocchi IL, Núñez MJ, Mukainaka T, Tokuda H, Nishino H, Konoshima T, Ravelo AG. Absolute configuration of sesquiterpenes from Crossopetalum tonduzii and their inhibitory effects on Epstein-Barr virus early antigen activation in Raji cells. JOURNAL OF NATURAL PRODUCTS 2003; 66:1047-1050. [PMID: 12932121 DOI: 10.1021/np0301240] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Two new sesquiterpenoids (1 and 2) with a dihydro-beta-agarofuran skeleton were isolated from Crossopetalum tonduzii. Their structures were elucidated on the basis of spectral analysis, including homonuclear and heteronuclear correlation NMR experiments (COSY, ROESY, HSQC, and HMBC). Their absolute configurations were determined by CD studies on 3, the benzoylated derivative of 1. Chemical correlations have allowed the absolute configurations of 4 and 5, two previously known dihydro-beta-agarofuran analogues, to be reported for the first time. Compounds 1, 2, and 5 showed strong antitumor-promoting effects on Epstein-Barr virus early antigen (EBV-EA) activation.
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Affiliation(s)
- Ignacio A Jiménez
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, La Laguna, 38206 Tenerife, Canary Islands, Spain
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29
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Núñez MJ, Cortés-Selva F, Bazzocchi IL, Jiménez IA, González AG, Ravelo AG, Gavin JA. Absolute configuration and complete assignment of 13C NMR data for new sesquiterpenes from Maytenus chiapensis. JOURNAL OF NATURAL PRODUCTS 2003; 66:572-574. [PMID: 12713421 DOI: 10.1021/np0205248] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Five new dihydro-beta-agarofuran sesquiterpenes (1-5) were isolated from the leaves of Maytenus chiapensis. The structures of 1-5 were determined by means of 1D and 2D NMR techniques. A semiselective HMBC technique was applied in order to obtain complete (13)C NMR assignments. Absolute configurations were determined by CD studies and chemical correlations and on biogenetic grounds. Compound 4 showed weak activity against a multidrug-resistant Leishmania tropica line.
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Affiliation(s)
- Marvin J Núñez
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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Descoins C, Bazzocchi IL, Ravelo AG. New sesquiterpenes from Euonymus europaeus (Celastraceae). Chem Pharm Bull (Tokyo) 2002; 50:199-202. [PMID: 11848209 DOI: 10.1248/cpb.50.199] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A new sesquiterpene evoninate alkaloid (1), and two sesquiterpenes (2, 3) with a dihydro-beta-agarofuran skeleton, along with three known sesquiterpenes (4-6), were isolated from the seeds of Euonymus europaeus. Their structures were elucidated by high resolution mass analysis, and one- and two-dimensional (1D and 2D) NMR spectroscopy, including homonuclear and heteronuclear correlation [correlation spectroscopy (COSY), rotating frame Overhauser enhancement spectroscopy (ROESY), heteronuclear single quantum coherence (HSQC), and heteronuclear multiple bond correlation (HMBC)] experiments.
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Affiliation(s)
- Charles Descoins
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Tenerife, Canary Islands, Spain
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