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Dos Santos JG, Fernandes CC, Silva NBS, Calefi GG, Martins CHG, Volpini GA, Crotti AEM, Ribeiro AB, Esperandim TR, Tavares DC, Batalini C, Miranda MLD. Volatile compounds of hexane extract from Pterodon pubescens Benth seeds and its significant in vitro potential against different bacterial strains. Nat Prod Res 2023:1-6. [PMID: 38143320 DOI: 10.1080/14786419.2023.2297405] [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: 08/16/2023] [Accepted: 12/11/2023] [Indexed: 12/26/2023]
Abstract
Pterodon pubescens Benth is a Brazilian medicinal plant (sucupira, in Brazilian Portuguese). This paper aims to determine the volatile composition and antibacterial activities of hexane extract from P. pubescens seeds (HE-PP). Antibacterial activities were screened by the microdilution broth method in 96-well culture plates and MIC values were expressed as µg/mL. HE-PP was active against several oral bacteria whose MIC values ranged between 12.5 µg/mL and 50 µg/mL and against three mycobacterial strains (MIC = 125 µg/mL and 500 µg/mL). In addition, HE-PP was active against Xanthomonas citri strain (MIC = 100 µg/mL). Cytotoxic activity of the extract was evaluated in human tumour and non-tumour cell lines. HE-PP showed selective cytotoxicity to cervical adenocarcinoma (HeLa cells - IC50 = 53.47 µg/mL). Its major constituents were identified by GC-MS and GC-FID: E-caryophyllene, vouacapane, E-geranylgeraniol and dehydroabietol. Results reinforce the biological potential of HE-PP against a broad spectrum of pathogenic and phytopathogenic bacteria.
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Affiliation(s)
- Jaciel G Dos Santos
- Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde, GO, Brazil
| | - Cassia C Fernandes
- Instituto Federal de Educação, Ciência e Tecnologia Goiano, Campus Rio Verde, Rio Verde, GO, Brazil
| | - Nagela B S Silva
- Laboratório de Ensaios Antimicrobiano (LEA), Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Gabriel G Calefi
- Laboratório de Ensaios Antimicrobiano (LEA), Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Carlos H G Martins
- Laboratório de Ensaios Antimicrobiano (LEA), Universidade Federal de Uberlândia, Uberlândia, Brazil
| | - Guilherme A Volpini
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Antônio E M Crotti
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | | | | | | | | | - Mayker L D Miranda
- Instituto Federal de Educação, Ciência e Tecnologia do Triângulo Mineiro, Campus Uberlândia Centro, MG, Brazil
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Langat MK, Kami T, Cheek M. Chemistry, taxonomy and ecology of the potentially chimpanzee-dispersed Vepris teva sp.nov. (Rutaceae) endangered in coastal thicket in the Congo Republic. PeerJ 2022; 10:e13926. [PMID: 36032959 PMCID: PMC9415428 DOI: 10.7717/peerj.13926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 07/30/2022] [Indexed: 01/19/2023] Open
Abstract
Continuing a survey of the chemistry of species of the largely continental African genus Vepris, we investigate a species previously referred to as Vepris sp. 1 of Congo. From the leaves of Vepris sp. 1 we report six compounds. The compounds were three furoquinoline alkaloids, kokusaginine (1), maculine (2), and flindersiamine (3), two acridone alkaloids, arborinine (4) and 1-hydroxy-3-methoxy-10-methylacridone (5), and the triterpenoid, ß-amyrin (6). Compounds 1-4 are commonly isolated from other Vepris species, compound 5 has been reported before once, from Malagasy Vepris pilosa, while this is the first report of ß-amyrin from Vepris. This combination of compounds has never before been reported from any species of Vepris. We test the hypothesis that Vepris sp. 1 is new to science and formally describe it as Vepris teva, unique in the genus in that the trifoliolate leaves are subsessile, with the median petiolule far exceeding the petiole in length. Similar fleshy-leathery four-locular syncarpous fruits are otherwise only known in the genus in Vepris glaberrima (formerly the monotypic genus Oriciopsis Engl.), a potential sister species, but requiring further investigation to confirm this phylogenetic position. We briefly characterise the unusual and poorly documented Atlantic coast equatorial ecosystem, where Vepris teva is restricted to evergreen thicket on white sand, unusual in a genus usually confined to evergreen forest. This endemic-rich ecosystem with a unique amphibian as well as plants, extends along the coastline from the mouth of the Congo River to southern Rio Muni, a distance of about 1,000 km, traversing five countries. We map and illustrate Vepris teva and assess its extinction risk as Endangered (EN B1ab(iii)+B2ab(iii)) using the IUCN, 2012 standard. Only three locations are known, and threats include port and oil refinery construction and associated activities, with only one protected location, the Jane Goodall Institute's Tchimpounga Reserve. Initial evidence indicates that the seeds of Vepris teva are dispersed by chimpanzees, previously unreported in the genus.
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Affiliation(s)
- Moses K. Langat
- Science, Royal Botanic Gardens, Kew, Richmond, United Kingdom
| | - Teva Kami
- Herbier National, Institut de Recherche National en Sciences Exactes et Naturelles (IRSEN), Brazzaville, Republic of Congo
| | - Martin Cheek
- Science, Royal Botanic Gardens, Kew, Richmond, United Kingdom
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Sadgrove NJ, Padilla-González GF, Phumthum M. Fundamental Chemistry of Essential Oils and Volatile Organic Compounds, Methods of Analysis and Authentication. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11060789. [PMID: 35336671 PMCID: PMC8955314 DOI: 10.3390/plants11060789] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/07/2022] [Accepted: 03/15/2022] [Indexed: 05/14/2023]
Abstract
The current text provides a comprehensive introduction to essential oils, their biosynthesis, naming, analysis, and chemistry. Importantly, this text quickly brings the reader up to a level of competence in the authentication of essential oils and their components. It gives detailed descriptions of enantiomers and other forms of stereoisomers relevant to the study of natural volatiles and essential oils. The text also describes GC-MS work and provides tips on rapid calculation of arithmetic indices, how to interpret suggested names from the NIST mass spectral library, and what additional efforts are required to validate essential oils and defeat sophisticated adulteration tactics. In brief, essential oils are mixtures of volatile organic compounds that were driven out of the raw plant material in distillation, condensed into an oil that is strongly aroma emitting, and collected in a vessel as the top layer (uncommonly bottom layer) of two phase separated liquids: oil and water. Essential oils commonly include components derived from two biosynthetic groups, being terpenes (monoterpenes, sesquiterpenes and their derivatives) and phenylpropanoids (aromatic ring with a propene tail). The current text provides details of how terpenes and phenylpropanoids are further categorised according to their parent skeleton, then recognised by the character of oxidation, which may be from oxygen, nitrogen, or sulphur, or the presence/absence of a double bond. The essential oil's science niche is an epicentre of individuals from diverse backgrounds, such as aromatherapy, pharmacy, synthetic and analytical chemistry, or the hobbyist. To make the science more accessible to the curious student or researcher, it was necessary to write this fundamentals-level introduction to the chemistry of essential oils (i.e., organic chemistry in the context of essential oils), which is herein presented as a comprehensive and accessible overview. Lastly, the current review constitutes the only resource that highlights common errors and explains in simplistic detail how to correctly interpret GC-MS data then accurately present the respective chemical information to the wider scientific audience. Therefore, detailed study of the contents herein will equip the individual with prerequisite knowledge necessary to effectively analyse an essential oil and make qualified judgement on its authenticity.
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Affiliation(s)
- Nicholas J. Sadgrove
- Royal Botanic Gardens, Kew, Kew Green, Richmond TW9 3DS, UK; (N.J.S.); (G.F.P.-G.)
| | | | - Methee Phumthum
- Royal Botanic Gardens, Kew, Kew Green, Richmond TW9 3DS, UK; (N.J.S.); (G.F.P.-G.)
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
- Correspondence:
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Ferreira OO, da Silva SHM, de Oliveira MS, Andrade EHDA. Chemical Composition and Antifungal Activity of Myrcia multiflora and Eugenia florida Essential Oils. Molecules 2021; 26:7259. [PMID: 34885839 PMCID: PMC8658826 DOI: 10.3390/molecules26237259] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/22/2021] [Accepted: 11/25/2021] [Indexed: 11/16/2022] Open
Abstract
The essential oils of three specimens of Myrcia multiflora (A, B and C) and Eugenia florida were extracted by hydrodistillation, and the chemical compositions from the essential oils were identified by gas chromatography and flame ionization detection (CG/MS and CG-FID). The fungicide potential of the EOs against five fungicide yeasts was assessed: Candida albicans INCQS-40175, C. tropicalis ATCC 6258, C. famata ATCC 62894, C. krusei ATCC 13803 and C. auris IEC-01. The essential oil of the specimen Myrcia multiflora (A) was characterized by the major compounds: α-bulnesene (26.79%), pogostol (21.27%) and δ-amorphene (6.76%). The essential oil of the specimen M. multiflora (B) was rich in (E)-nerolidol (44.4%), (E)-γ-bisabolene (10.64%) and (E,E)-α-farnesene (8.19%), while (E)-nerolidol (92.21%) was the majority of the specimen M. multiflora (C). The sesquiterpenes seline-3,11-dien-6-α-ol (12.93%), eremoligenol (11%) and γ-elemene (10.70%) characterized the chemical profile of the EOs of E. florida. The fungal species were sensitive to the essential oil of M. multiflora (B) (9-11 mm), and the lowest inhibitory concentration (0.07%) was observed in the essential oil of M. multiflora (A) against the yeasts of C. famata. Fungicidal action was observed in the essential oils of M. multiflora (A) against C. famata, with an MIC of 0.78 µL/mL and 3.12 µL/mL; C. albicans, with an MFC of 50 µL/mL and M. multiflora (C) against C. albicans; and C. krusei, with a MFC of 50 µL/mL.
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Affiliation(s)
- Oberdan Oliveira Ferreira
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia-Rede Bionorte, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa S/N, Guamá, Belém 66075-900, Brazil
| | - Silvia Helena Marques da Silva
- Seção de Bacteriologia e Micologia LabMicol-SABMI Laboratório de Micologia, Instituto Evandro Chagas-IEC/SVS/MS, Rodovia BR 316 KM 07, Levilândia, Ananindeua 67030-000, Brazil
| | - Mozaniel Santana de Oliveira
- Laboratório Adolpho Ducke, Coordenação de Botânica, Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Terra Firme, Belém 66077-830, Brazil
| | - Eloisa Helena de Aguiar Andrade
- Programa de Pós-Graduação em Biodiversidade e Biotecnologia-Rede Bionorte, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa S/N, Guamá, Belém 66075-900, Brazil
- Laboratório Adolpho Ducke, Coordenação de Botânica, Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Terra Firme, Belém 66077-830, Brazil
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Sadgrove NJ, Padilla-González GF, Leuner O, Melnikovova I, Fernandez-Cusimamani E. Pharmacology of Natural Volatiles and Essential Oils in Food, Therapy, and Disease Prophylaxis. Front Pharmacol 2021; 12:740302. [PMID: 34744723 PMCID: PMC8566702 DOI: 10.3389/fphar.2021.740302] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/04/2021] [Indexed: 12/19/2022] Open
Abstract
This commentary critically examines the modern paradigm of natural volatiles in 'medical aromatherapy', first by explaining the semantics of natural volatiles in health, then by addressing chemophenetic challenges to authenticity or reproducibility, and finally by elaborating on pharmacokinetic and pharmacodynamic processes in food, therapy, and disease prophylaxis. Research over the last 50 years has generated substantial knowledge of the chemical diversity of volatiles, and their strengths and weaknesses as antimicrobial agents. However, due to modest in vitro outcomes, the emphasis has shifted toward the ability to synergise or potentiate non-volatile natural or pharmaceutical drugs, and to modulate gene expression by binding to the lipophilic domain of mammalian cell receptors. Because essential oils and natural volatiles are small and lipophilic, they demonstrate high skin penetrating abilities when suitably encapsulated, or if derived from a dietary item they bioaccumulate in fatty tissues in the body. In the skin or body, they may synergise or drive de novo therapeutic outcomes that range from anti-inflammatory effects through to insulin sensitisation, dermal rejuvenation, keratinocyte migration, upregulation of hair follicle bulb stem cells or complementation of anti-cancer therapies. Taking all this into consideration, volatile organic compounds should be examined as candidates for prophylaxis of cardiovascular disease. Considering the modern understanding of biology, the science of natural volatiles may need to be revisited in the context of health and nutrition.
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Affiliation(s)
| | | | - Olga Leuner
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Ingrid Melnikovova
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Eloy Fernandez-Cusimamani
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Prague, Czech Republic
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Sadgrove NJ, Padilla-González GF, Green A, Langat MK, Mas-Claret E, Lyddiard D, Klepp J, Legendre SVAM, Greatrex BW, Jones GL, Ramli IM, Leuner O, Fernandez-Cusimamani E. The Diversity of Volatile Compounds in Australia's Semi-Desert Genus Eremophila (Scrophulariaceae). PLANTS 2021; 10:plants10040785. [PMID: 33923613 PMCID: PMC8073941 DOI: 10.3390/plants10040785] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/09/2021] [Accepted: 04/13/2021] [Indexed: 12/20/2022]
Abstract
Australia’s endemic desert shrubs are commonly aromatic, with chemically diverse terpenes and phenylpropanoids in their headspace profiles. Species from the genus Eremophila (Scrophulariaceae ex. Myoporaceae) are the most common, with 215 recognised taxa and many more that have not yet been described, widely spread across the arid parts of the Australian continent. Over the years, our research team has collected multiple specimens as part of a survey to investigate the chemical diversity of the genus and create leads for further scientific enquiry. In the current study, the diversity of volatile compounds is studied using hydrodistilled essential oils and leaf solvent extracts from 30 taxa. Several rare terpenes and iridoids were detected in chemical profiles widely across the genus, and three previously undescribed sesquiterpenes were isolated and are assigned by 2D NMR—E-11(12)-dehydroisodendrolasin, Z-11-hydroxyisodendrolasin and 10-hydroxydihydro-α-humulene acetate. Multiple sampling from Eremophila longifolia, Eremophila arbuscular, Eremophila latrobei, Eremophila deserti, Eremophila sturtii, Eremophila oppositifolia and Eremophila alternifolia coneys that species in Eremophila are highly chemovariable. However, taxa are generally grouped according to the expression of (1) furanosesquiterpenes, (2) iridoids or oxides, (3) mixtures of 1 and 2, (4) phenylpropanoids, (5) non-furanoid terpenes, (6) mixtures of 4 and 5, and less commonly (7) mixtures of 1 and 5. Furthermore, GC–MS analysis of solvent-extracted leaves taken from cultivated specimens conveys that many heavier ‘volatiles’ with lower vapour pressure are not detected in hydrodistilled essential oils and have therefore been neglected in past chemical studies. Hence, our data reiterate that chemical studies of the genus Eremophila will continue to describe new metabolites and that taxon determination has limited predictive value for the chemical composition.
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Affiliation(s)
- Nicholas J. Sadgrove
- Jodrell Science Laboratory, Royal Botanic Gardens Kew, Richmond TW9 3DS, UK; (G.F.P.-G.); (A.G.); (M.K.L.); (E.M.-C.)
- Correspondence: (N.J.S.); (E.F.-C.); Tel.: +44-785-756-9823 (N.J.S.); +420-224-382-183 (E.F.-C.)
| | - Guillermo F. Padilla-González
- Jodrell Science Laboratory, Royal Botanic Gardens Kew, Richmond TW9 3DS, UK; (G.F.P.-G.); (A.G.); (M.K.L.); (E.M.-C.)
| | - Alison Green
- Jodrell Science Laboratory, Royal Botanic Gardens Kew, Richmond TW9 3DS, UK; (G.F.P.-G.); (A.G.); (M.K.L.); (E.M.-C.)
| | - Moses K. Langat
- Jodrell Science Laboratory, Royal Botanic Gardens Kew, Richmond TW9 3DS, UK; (G.F.P.-G.); (A.G.); (M.K.L.); (E.M.-C.)
| | - Eduard Mas-Claret
- Jodrell Science Laboratory, Royal Botanic Gardens Kew, Richmond TW9 3DS, UK; (G.F.P.-G.); (A.G.); (M.K.L.); (E.M.-C.)
| | - Dane Lyddiard
- School of Science and Technology and School of Rural Medicine, University of New England, Armidale, NSW 2351, Australia; (D.L.); (J.K.); (S.V.A.-M.L.); (B.W.G.); (G.L.J.); (I.M.R.)
| | - Julian Klepp
- School of Science and Technology and School of Rural Medicine, University of New England, Armidale, NSW 2351, Australia; (D.L.); (J.K.); (S.V.A.-M.L.); (B.W.G.); (G.L.J.); (I.M.R.)
| | - Sarah V. A.-M. Legendre
- School of Science and Technology and School of Rural Medicine, University of New England, Armidale, NSW 2351, Australia; (D.L.); (J.K.); (S.V.A.-M.L.); (B.W.G.); (G.L.J.); (I.M.R.)
| | - Ben W. Greatrex
- School of Science and Technology and School of Rural Medicine, University of New England, Armidale, NSW 2351, Australia; (D.L.); (J.K.); (S.V.A.-M.L.); (B.W.G.); (G.L.J.); (I.M.R.)
| | - Graham L. Jones
- School of Science and Technology and School of Rural Medicine, University of New England, Armidale, NSW 2351, Australia; (D.L.); (J.K.); (S.V.A.-M.L.); (B.W.G.); (G.L.J.); (I.M.R.)
| | - Iskandar M. Ramli
- School of Science and Technology and School of Rural Medicine, University of New England, Armidale, NSW 2351, Australia; (D.L.); (J.K.); (S.V.A.-M.L.); (B.W.G.); (G.L.J.); (I.M.R.)
| | - Olga Leuner
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic;
| | - Eloy Fernandez-Cusimamani
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Prague, Czech Republic;
- Correspondence: (N.J.S.); (E.F.-C.); Tel.: +44-785-756-9823 (N.J.S.); +420-224-382-183 (E.F.-C.)
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