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Natural Antifungal Products: Another Option for Antifungal Resistance. Fungal Biol 2022. [DOI: 10.1007/978-3-030-89664-5_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Kasote D, Bankova V, Viljoen AM. Propolis: chemical diversity and challenges in quality control. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2022; 21:1887-1911. [PMID: 35645656 PMCID: PMC9128321 DOI: 10.1007/s11101-022-09816-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 03/08/2022] [Indexed: 05/09/2023]
Abstract
UNLABELLED Propolis is a resinous natural product produced by honeybees using beeswax and plant exudates. The chemical composition of propolis is highly complex, and varies with region and season. This inherent chemical variability presents several challenges to its standardisation and quality control. The present review was aimed at highlighting marker compounds for different types of propolis, produced by the species Apis mellifera, from different geographical origins and that display different biological activities, and to discuss strategies for quality control. Over 800 compounds have been reported in the different propolises such as temperate, tropical, birch, Mediterranean, and Pacific propolis; these mainly include alcohols, acids and their esters, benzofuranes, benzopyranes, chalcones, flavonoids and their esters, glycosides (flavonoid and diterpene), glycerol and its esters, lignans, phenylpropanoids, steroids, terpenes and terpenoids. Among these, flavonoids (> 140), terpenes and terpenoids (> 160) were major components. A broad range of biological activities, such as anti-oxidant, antimicrobial, anti-inflammatory, immunomodulatory, and anticancer activities, have been ascribed to propolis constituents, as well as the potential of these compounds to be biomarkers. Several analytical techniques, including non-separation and separation methods have been described in the literature for the quality control assessment of propolis. Mass spectrometry coupled with separation methods, followed by chemometric analysis of the data, was found to be a valuable tool for the profiling and classification of propolis samples, including (bio)marker identification. Due to the rampant chemotypic variability, a multiple-marker assessment strategy considering geographical and biological activity marker(s) with chemometric analysis may be a promising approach for propolis quality assessment. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s11101-022-09816-1.
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Affiliation(s)
- Deepak Kasote
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001 South Africa
| | - Vassya Bankova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Alvaro M. Viljoen
- Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001 South Africa
- SAMRC Herbal Drugs Research Unit, Department of Pharmaceutical Sciences, Tshwane University of Technology, Private Bag X680, Pretoria, 0001 South Africa
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Marques EDJ, Ferraz CG, dos Santos IB, dos Santos II, El-Bachá RS, Ribeiro PR, Cruz FG. Chemical constituents isolated from Clusia criuva subsp. Criuva and their chemophenetics significance. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2021.104293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lu WJ, Xu WJ, Zhang MH, Zhang YQ, Li YR, Zhang H, Luo J, Kong LY. Diverse Polycyclic Polyprenylated Acylphloroglucinol Congeners with Anti-Nonalcoholic Steatohepatitis Activity from Hypericum forrestii. JOURNAL OF NATURAL PRODUCTS 2021; 84:1135-1148. [PMID: 33788569 DOI: 10.1021/acs.jnatprod.0c01202] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The new polycyclic polyprenylated acylphloroglucinols, hyperforcinols A-J (1-10), were isolated from the fruits of Hypericum forrestii, together with 30 biogenetic congeners of known structures. The structures of hyperforcinols A-J were determined by HRESIMS and 1D/2D NMR spectroscopic analysis, and their absolute configurations were determined by a combination of the electronic circular dichroism (ECD) exciton chirality method, ECD calculations, and X-ray diffraction analysis. A selection of 25 isolates, possessing seven types of carbon skeletons, were assessed for their in vitro effects against nonalcoholic steatohepatitis (NASH) using a free fatty acid-induced L02 cell model. Compounds 20 and 40 significantly decreased intracellular lipid accumulation. QRT-PCR analyses revealed that compounds 20 and 40 regulate the expression of lipid metabolism-related genes, including CD36, FASN, PPARα, and ACOX1.
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Affiliation(s)
- Wei-Jia Lu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Wen-Jun Xu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Mei-Hui Zhang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Yan-Qiu Zhang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Yi-Ran Li
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Hao Zhang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Jun Luo
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Ling-Yi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
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Ferraz CG, Silva MDC, Pereira DA, Caldas BV, Mattos R, Oliveira VV, Andrade EM, Soares AC, da Silva F, Cruz FG, Ribeiro PR. Polyprenylated benzophenone derivatives from Clusia burle-marxii and their chemotaxonomic significance. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2020.104218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Lessons from Exploring Chemical Space and Chemical Diversity of Propolis Components. Int J Mol Sci 2020; 21:ijms21144988. [PMID: 32679731 PMCID: PMC7404124 DOI: 10.3390/ijms21144988] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 12/14/2022] Open
Abstract
Propolis is a natural resinous material produced by bees and has been used in folk medicines since ancient times. Due to it possessing a broad spectrum of biological activities, it has gained significant scientific and commercial interest over the last two decades. As a result of searching 122 publications reported up to the end of 2019, we assembled a unique compound database consisting of 578 components isolated from both honey bee propolis and stingless bee propolis, and analyzed the chemical space and chemical diversity of these compounds. The results demonstrated that both honey bee propolis and stingless bee propolis are valuable sources for pharmaceutical and nutraceutical development.
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The Cuban Propolis Component Nemorosone Inhibits Proliferation and Metastatic Properties of Human Colorectal Cancer Cells. Int J Mol Sci 2020; 21:ijms21051827. [PMID: 32155848 PMCID: PMC7084755 DOI: 10.3390/ijms21051827] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/05/2020] [Accepted: 03/05/2020] [Indexed: 12/12/2022] Open
Abstract
The majority of deaths related to colorectal cancer (CRC) are associated with the metastatic process. Alternative therapeutic strategies, such as traditional folk remedies, deserve attention for their potential ability to attenuate the invasiveness of CRC cells. The aim of this study is to investigate the biological activity of brown Cuban propolis (CP) and its main component nemorosone (NEM) and to describe the molecular mechanism(s) by which they inhibit proliferation and metastatic potential of 2 CRC cell lines, i.e., HT-29 and LoVo. Our results show that CP and NEM significantly decreased cell viability and inhibited clonogenic capacity of CRC cells in a dose and time-dependent manner, by arresting the cell cycle in the G0/G1 phase and inducing apoptosis. Furthermore, CP and NEM downregulated BCL2 gene expression and upregulated the expression of the proapoptotic genes TP53 and BAX, with a consequent activation of caspase 3/7. They also attenuated cell migration and invasion by inhibiting MMP9 activity, increasing E-cadherin and decreasing β-catenin and vimentin expression, proteins involved in the epithelial–mesenchymal transition (EMT). In conclusion NEM, besides displaying antiproliferative activity on CRC cells, is able to decrease their metastatic potential by modulating EMT-related molecules. These finding provide new insight about the mechanism(s) of the antitumoral properties of CP, due to NEM content.
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Comprehensive multivariate correlations between climatic effect, metabolite-profile, antioxidant capacity and antibacterial activity of Brazilian red propolis metabolites during seasonal study. Sci Rep 2019; 9:18293. [PMID: 31797960 PMCID: PMC6893030 DOI: 10.1038/s41598-019-54591-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/07/2019] [Indexed: 11/09/2022] Open
Abstract
The standardization of apiceutical products like as propolis extracts has been widely debated worldwide and variations in the propolis chemical composition are still very relevant topics for use-standardized of different propolis-type as medication by much of the world’s population. The present manuscript discuss important issues related to the climate effect and variations in propolis metabolite-profiling changes, antioxidant capacity and variations of the antibacterial activity of the Brazilian red propolis metabolites using comprehensive multivariate correlations. It was observed the increasing of guttiferones concentrations during the intense drought period and drastic decreasing in rainy period. The climate variation induced the high concentration of flavonoids in rainy period with pronounced dropped in some rainy months. The Pearson´s analysis demonstrated correlation between IC50 from DPPH and guttiferones and flavonoids concentrations. The PCA-X and Hotelling T2 test showed outliers during the months with lowest concentrations of formononetin and isoliquiritigenin was observed in antibacterial tests. The PLS-DA, OPLS-DA and VIP analysis demonstrate guttiferone E, guttiferone B, liquiritigenin, naringenin are considered important substances responsible by anti-staphylococcal activity in red propolis composition during the rainy season and drought period, but a synergistic effect with other flavonoids and isoflavonoids are not ruled out.
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Frión-Herrera Y, Gabbia D, Díaz-García A, Cuesta-Rubio O, Carrara M. Chemosensitizing activity of Cuban propolis and nemorosone in doxorubicin resistant human colon carcinoma cells. Fitoterapia 2019; 136:104173. [DOI: 10.1016/j.fitote.2019.104173] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/06/2019] [Accepted: 05/10/2019] [Indexed: 12/12/2022]
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10
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Popova MP, Trusheva BS, Nedialkov PT, Tsvetkova I, Pardo-Mora DP, Najdenski H, Torres-García OA, Sforcin JM, Bankova VS. New Δ-tocotrienol derivatives from Colombian propolis. Nat Prod Res 2019; 34:2779-2786. [PMID: 30938183 DOI: 10.1080/14786419.2019.1590710] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Two new δ-tocotrienol derivatives with oxidized terminal chain: 5,6-dioxo-garcinoic acid (trans-13'-carboxy-5,6-dioxo-δ-tocotrienol) (2) and 5-hydroxy-8b-oxo garcinoic acid (trans-13'-carboxy-5-hydroxy-8b-oxo-δ-tocotrienol) (3), together with one known derivative garcinoic acid (trans-13'-carboxy-δ-tocotrienol) (1) were isolated from a Colombian propolis. Garcinoic acid was found as a propolis constituent for the first time. The isolated compounds and crude ethanolic extract demonstrated high antimicrobial activity against Staphylococcus aureus and Candida albicans (MICs range: 10-39 μg/ml) as well as promising antioxidant potential in DPPH assay. Compound 3 displayed highest radical scavenging activity, even higher than that of dl-α-tocopherol, used as a positive control.
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Affiliation(s)
- Milena P Popova
- Institute of Organic Chemistry with Centre of Phytochemistry Bulgarian Academy of Sciences , Sofia , Bulgaria
| | - Boryana S Trusheva
- Institute of Organic Chemistry with Centre of Phytochemistry Bulgarian Academy of Sciences , Sofia , Bulgaria
| | - Paraskev T Nedialkov
- Department of Pharmacognosy Faculty of Pharmacy, Medical University-Sofia , Sofia , Bulgaria
| | - Iva Tsvetkova
- Institute of Microbiology "Stefan Angelov" Bulgarian Academy of Sciences , Sofia , Bulgaria
| | - Dolly P Pardo-Mora
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Antonio Nariño , Bogotá , Colombia
| | - Hristo Najdenski
- Institute of Microbiology "Stefan Angelov" Bulgarian Academy of Sciences , Sofia , Bulgaria
| | - Orlando A Torres-García
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Antonio Nariño , Bogotá , Colombia
| | - José M Sforcin
- São Paulo State University (UNESP), Institute of Biosciences , Campus Botucatu , Brazil
| | - Vassya S Bankova
- Institute of Organic Chemistry with Centre of Phytochemistry Bulgarian Academy of Sciences , Sofia , Bulgaria
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11
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Bankova V, Popova M, Trusheva B. Plant Sources of Propolis: An Update from a Chemist's Point of View. Nat Prod Commun 2019. [DOI: 10.1177/1934578x0600101118] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The newest developments in research on propolis plant sources are summarized. Special attention is paid to data based on reliable chemical evidence including comparison between propolis samples and plant material, and on well-documented bee behavior. A number of new proved propolis source plants are listed. Hypothetical sources, suggested as a result of comparison of propolis chemical composition and literature data about particular plants are also discussed.
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Affiliation(s)
- Vassya Bankova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str. Bl.9, 1113 Sofia, Bulgaria
| | - Milena Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str. Bl.9, 1113 Sofia, Bulgaria
| | - Boryana Trusheva
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str. Bl.9, 1113 Sofia, Bulgaria
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12
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Acetophenone derivatives from the roots of Melicope ptelefolia. Fitoterapia 2018; 132:40-45. [PMID: 30496807 DOI: 10.1016/j.fitote.2018.11.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 11/17/2018] [Accepted: 11/24/2018] [Indexed: 12/30/2022]
Abstract
Five new prenylated acetophenones, melicoptelins A-E (1-5), along with one known congener (6) were isolated from the roots of Melicope ptelefolia. Among them, compounds 2a/2b, 3a/3b, and 4a/4b were obtained as inseparable interconverting mixtures of keto and enol tautomers. Their structures were elucidated on the basis of extensive spectroscopic methods, including 1D, 2D NMR and HRESIMS. Compouds 2a/2b, 4a/4b and 5 exhibit protein tyrosine phosphatase 1B (PTP1B) inhibitory activity with IC50 values of 34.4, 55.2 and 66.6 μM, respectively.
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13
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Bankova V, Popova M, Trusheva B. The phytochemistry of the honeybee. PHYTOCHEMISTRY 2018; 155:1-11. [PMID: 30053651 DOI: 10.1016/j.phytochem.2018.07.007] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 07/09/2018] [Accepted: 07/16/2018] [Indexed: 06/08/2023]
Abstract
Honeybees rely on plants for everything they need to keep the colony running; plant nectar and pollen are their only carbohydrate and protein food sources. By foraging to satisfy their basic nutritional demand, honeybees inevitably gather specialized plant metabolites as part of the nectar and pollen. In general, these compounds possess biological activity which may become relevant in fighting pests and pathogens in the hive. The third plant derived bee product, besides honey and bee pollen, is propolis (bee glue), which comes from plant resins. It is not a food; it is used as a building material and a defensive substance. Thus, the beehive is rich in specialized plant metabolites, produced by many different plant species and the expression "Phytochemistry of honeybees" is not inappropriate. However, it is virtually impossible to perform a detailed overview of the phytochemical features of honey and pollen in a review article of this nature, for reasons of space. The present review deals with propolis, because it is the bee product with highest concentration of specialized plant metabolites and has valuable pharmacological activities. The most recent developments concerning plant sources of propolis, bees' preferences to particular plants, the application of metabolomic approaches and chemometrics to propolis research and the problems concerning standardization of propolis are summarized. The overview covers the literature published in the last decade, after 2007.
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Affiliation(s)
- Vassya Bankova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 9, 1113 Sofia, Bulgaria.
| | - Milena Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 9, 1113 Sofia, Bulgaria.
| | - Boryana Trusheva
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 9, 1113 Sofia, Bulgaria.
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Chaturonrutsamee S, Kuhakarn C, Surawatanawong P, Prabpai S, Kongsaeree P, Jaipetch T, Piyachaturawat P, Jariyawat S, Akkarawongsapat R, Suksen K, Limthongkul J, Napaswad C, Nuntasaen N, Reutrakul V. Polycyclic polyprenylated acylphloroglucinols and biphenyl derivatives from the roots of Garcinia nuntasaenii Ngerns. & Suddee. PHYTOCHEMISTRY 2018; 146:63-74. [PMID: 29247893 DOI: 10.1016/j.phytochem.2017.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/30/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
Seven previously undescribed compounds, including three polycyclic polyprenylated acylphloroglucinols (garcinuntins A-C), three biphenyl derivatives (garcinuntabiphenyls A-C) and a lanostane triterpene (garcinuntine), along with thirteen known compounds were isolated from the root of Garcinia nuntasaenii Ngerns. & Suddee. Their structures were elucidated on the basis of spectroscopic techniques. For garcinuntins A-C, the absolute configurations were confirmed by the combination of single X-ray crystallography and ECD calculations. Anti-HIV activity using anti-HIV-1 reverse transcriptase and syncytium inhibition assays, and cytotoxic activity against a panel of cultured mammalian cancer cell lines of isolated compounds were investigated.
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Affiliation(s)
- Suppisak Chaturonrutsamee
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand; Research and Development Department, International Laboratories Corp., Ltd., Bang Phli, Samut Prakan 10540, Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Panida Surawatanawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Samran Prabpai
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Palangpon Kongsaeree
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Thaworn Jaipetch
- Mahidol University, Center of Excellence for Innovation in Chemistry (PERCH-CIC), Kanchanaburi Campus, Saiyok, Kanchanaburi 71150, Thailand
| | - Pawinee Piyachaturawat
- Department of Physiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Surawat Jariyawat
- Department of Physiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Radeekorn Akkarawongsapat
- Department of Microbiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Kanoknetr Suksen
- Department of Physiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Jitra Limthongkul
- Department of Microbiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Chanita Napaswad
- Department of Microbiology, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Narong Nuntasaen
- The Forest Herbarium, Department of National Parks, Wildlife and Plant Conservation, Ministry of Natural Resources and Environment, Bangkok 10900, Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand.
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Guttroff C, Baykal A, Wang H, Popella P, Kraus F, Biber N, Krauss S, Götz F, Plietker B. Polycyclische, polyprenylierte Acylphloroglucinole - eine Klasse nicht-peptidbasierter MRSA- und VRE-aktiver Antibiotika. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707069] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Claudia Guttroff
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Aslihan Baykal
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Huanhuan Wang
- Mikrobielle Genetik, Interfakultäres Institut für Mikrobiologie und Infektionsmedizin Tübingen (IMIT); Universität Tübingen; Auf der Morgenstelle 28 72076 Tübingen Deutschland
| | - Peter Popella
- Mikrobielle Genetik, Interfakultäres Institut für Mikrobiologie und Infektionsmedizin Tübingen (IMIT); Universität Tübingen; Auf der Morgenstelle 28 72076 Tübingen Deutschland
| | - Frank Kraus
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Nicole Biber
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Sophia Krauss
- Mikrobielle Genetik, Interfakultäres Institut für Mikrobiologie und Infektionsmedizin Tübingen (IMIT); Universität Tübingen; Auf der Morgenstelle 28 72076 Tübingen Deutschland
| | - Friedrich Götz
- Mikrobielle Genetik, Interfakultäres Institut für Mikrobiologie und Infektionsmedizin Tübingen (IMIT); Universität Tübingen; Auf der Morgenstelle 28 72076 Tübingen Deutschland
| | - Bernd Plietker
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Deutschland
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16
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Polycyclic Polyprenylated Acylphloroglucinols: An Emerging Class of Non-Peptide-Based MRSA- and VRE-Active Antibiotics. Angew Chem Int Ed Engl 2017; 56:15852-15856. [DOI: 10.1002/anie.201707069] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 08/27/2017] [Indexed: 01/26/2023]
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17
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Antidiabetic plant-derived nutraceuticals: a critical review. Eur J Nutr 2017; 57:1275-1299. [PMID: 29022103 DOI: 10.1007/s00394-017-1552-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 09/28/2017] [Indexed: 12/14/2022]
Abstract
Diabetes mellitus (DM) is one of the major health problems in the world, especially amongst the urban population. Chemically synthesized drugs used to decrease the ill effects of DM and its secondary complications cause adverse side effects, viz., weight gain, gastrointestinal disturbances, and heart failure. Currently, various other approaches, viz., diet control, physical exercise and use of antidiabetic plant-derived molecules/foods are advocated to manage DM, as they are economical with fewer or no side effects. This review mainly focuses on antidiabetic plants, chemically characterized plant molecules and plant-based foods in the treatment of DM. Very little science-based evidence is available on the mechanism of action of plant-derived food molecules on the DM targets. Critical DM targets include α-amylase, α-glucosidase, DPP-IV, aldose reductase, PPAR-γ, AMP kinase and GLUT4. In-depth studies carried out on a few of those targets with specific mechanisms of action are addressed in this review. This review may help future researchers in identifying a right plant molecule to treat DM or to develop food formulations for DM management.
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Oliveira AH, de Oliveira GG, Carnevale Neto F, Portuondo DF, Batista-Duharte A, Carlos IZ. Anti-inflammatory activity of Vismia guianensis (Aubl.) Pers. extracts and antifungal activity against Sporothrix schenckii. JOURNAL OF ETHNOPHARMACOLOGY 2017; 195:266-274. [PMID: 27856302 DOI: 10.1016/j.jep.2016.11.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 11/08/2016] [Accepted: 11/13/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Vismia guianensis (Aubl.) Pers. is traditionally used in North and Northeast of Brazil for the treatment of dermatomycoses. Since the strategy associating immunomodulators with antifungal drugs seems to be promissory to improve the treatment efficacy in fungal infections, we aimed to investigate the antifungal activity of V. guianensis ethanolic extract of leaves (VGL) and bark (VGB) against Sporothrix schenckii ATCC 16345 and their antinflammatory activities. MATERIAL AND METHODS The extracts were analyzed by HPLC-DAD-IT MS/MS for in situ identification of major compounds. Antifungal activity was evaluated in vitro (microdilution test) and in vivo using a murine model of S. schenckii infection. The production of TNF-α, IFN-γ, IL-4, IL-10 and IL-12 by measured by ELISA, as well as measured the production and inhibition of the NO after treatment with the plant extracts or itraconazole (ITR). RESULTS Two O-glucosyl-flavonoids and 16 prenylated benzophenone derivatives already described for Vismia were detected. Both VGL and VGB showed significant antifungal activity either in in vitro assay of microdilution (MIC=3.9µg/mL) and in vivo model of infection with reduction of S. schenckii load in spleen. It was also observed a predominance of reduction in the production of NO and the proinflammatory cytokines evaluated except TNFα, but with stimulation of IL-10, as evidence of a potential anti-inflammatory effect associated. CONCLUSION The results showed that both VGL and VGB have a significant antifungal against S. schenckii and an anti-inflammatory activity. These results can support the use of these extracts for alternative treatment of sporotrichosis.
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Affiliation(s)
- A H Oliveira
- Faculdade de Ciências Farmacêuticas. Universidade Estadual Paulista Julio Mesquita Filho, UNESP, Rod. Araraquara-Jaú - Km 1 -s/n -CEP: 14800-903, Araraquara, SP, Brazil
| | - G G de Oliveira
- Faculdade de Ciências Farmacêuticas de Riberão Preto, Universidade Estadual de São Paulo, Departamento de Física e Química, Riberão Preto, SP, Brazil
| | - F Carnevale Neto
- Faculdade de Ciências Farmacêuticas de Riberão Preto, Universidade Estadual de São Paulo, Departamento de Física e Química, Riberão Preto, SP, Brazil
| | - D F Portuondo
- Faculdade de Ciências Farmacêuticas. Universidade Estadual Paulista Julio Mesquita Filho, UNESP, Rod. Araraquara-Jaú - Km 1 -s/n -CEP: 14800-903, Araraquara, SP, Brazil
| | - A Batista-Duharte
- Faculdade de Ciências Farmacêuticas. Universidade Estadual Paulista Julio Mesquita Filho, UNESP, Rod. Araraquara-Jaú - Km 1 -s/n -CEP: 14800-903, Araraquara, SP, Brazil
| | - I Z Carlos
- Faculdade de Ciências Farmacêuticas. Universidade Estadual Paulista Julio Mesquita Filho, UNESP, Rod. Araraquara-Jaú - Km 1 -s/n -CEP: 14800-903, Araraquara, SP, Brazil
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Thoreliolides A and B, two polyisoprenylated benzoylphloroglucinol derivatives with a new carbon skeleton from the fruits of Calophyllum thorelii. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Saeed F, Ahmad RS, Arshad MU, Niaz B, Batool R, Naz R, Ansar Rasul Suleria H. Propolis to Curb Lifestyle Related Disorders: An Overview. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2015. [DOI: 10.1080/10942912.2012.745131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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21
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Pardo Andreu GL, Reis FH, Dalalio FM, Nuñez Figueredo Y, Cuesta Rubio O, Uyemura SA, Curti C, Alberici LC. The cytotoxic effects of brown Cuban propolis depend on the nemorosone content and may be mediated by mitochondrial uncoupling. Chem Biol Interact 2015; 228:28-34. [DOI: 10.1016/j.cbi.2015.01.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 12/28/2014] [Accepted: 01/07/2015] [Indexed: 12/20/2022]
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22
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Li D, Xue Y, Zhu H, Li Y, Sun B, Liu J, Yao G, Zhang J, Du G, Zhang Y. Hyperattenins A–I, bioactive polyprenylated acylphloroglucinols from Hypericum attenuatum Choisy. RSC Adv 2015. [DOI: 10.1039/c4ra11675e] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nine new bioactive polyprenylated acylphloroglucinols were isolated from the aerial parts ofHypericum attenuatumChoisy.
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Wu SB, Long C, Kennelly EJ. Structural diversity and bioactivities of natural benzophenones. Nat Prod Rep 2014; 31:1158-74. [DOI: 10.1039/c4np00027g] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Natural benzophenones are a class of compounds with more than 300 members, mainly in the Clusiaceae family. We review key benzophenones, and provide an in-depth discussion of their great structural diversity and biological activity.
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Affiliation(s)
- Shi-Biao Wu
- College of Life and Environmental Science
- Minzu Unversity of China
- Beijing 100081, China
- Department of Biological Sciences
- Lehman College, and The Graduate Center
| | - Chunlin Long
- College of Life and Environmental Science
- Minzu Unversity of China
- Beijing 100081, China
| | - Edward J. Kennelly
- College of Life and Environmental Science
- Minzu Unversity of China
- Beijing 100081, China
- Department of Biological Sciences
- Lehman College, and The Graduate Center
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24
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Barrientos L, Herrera CL, Montenegro G, Ortega X, Veloz J, Alvear M, Cuevas A, Saavedra N, Salazar LA. Chemical and botanical characterization of Chilean propolis and biological activity on cariogenic bacteria Streptococcus mutans and Streptococcus sobrinus. Braz J Microbiol 2013; 44:577-85. [PMID: 24294257 PMCID: PMC3833163 DOI: 10.1590/s1517-83822013000200038] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Accepted: 09/10/2012] [Indexed: 01/18/2023] Open
Abstract
Propolis is a non-toxic natural substance with multiple pharmacological properties including anti-cancer, antioxidant, fungicidal, antibacterial, antiviral, and anti-inflammatory among others. The aim of this study was to determine the chemical and botanical characterization of Chilean propolis samples and to evaluate their biological activity against the cariogenic bacteria Streptococcus mutans and Streptococcus sobrinus. Twenty propolis samples were obtained from beekeeping producers from the central and southern regions of Chile. The botanical profile was determined by palynological analysis. Total phenolic contents were determined using colorimetric assays. Reverse phase HPLC and HPLC-MS were used to determine the chemical composition. The minimum inhibitory concentration (MIC) was determined on S. mutans and S. sobrinus. All propolis samples were dominated by structures from native plant species. The characterization by HPLC/MS, evidenced the presence of quercetin, myricetin, kaempferol, rutine, pinocembrin, coumaric acid, caffeic acid and caffeic acid phenethyl ester, that have already been described in these propolis with conventional HPLC. Although all propolis samples inhibited the mutans streptococci growth, it was observed a wide spectrum of action (MIC 0.90 to 8.22 μg mL(-1)). Given that results it becomes increasingly evident the need of standardization procedures, where we combine both the determination of botanical and the chemical characterization of the extracts. Research conducted to date, describes a promising effectiveness of propolis in the prevention of caries and other diseases of the oral cavity, making it necessary to develop studies to identify and understand the therapeutic targets or mechanisms of molecular action of the various compounds present on them.
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Affiliation(s)
- Leticia Barrientos
- Centro de Biología Molecular & Farmacogenética, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
- Centro de Excelencia en Estudios Genéticos e Inmunológicos, Universidad de La Frontera, Temuco, Chile
| | - Christian L. Herrera
- Centro de Biología Molecular & Farmacogenética, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Gloria Montenegro
- Departamento de Ciencias Vegetales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ximena Ortega
- Departamento de Ciencias Vegetales, Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Jorge Veloz
- Centro de Biología Molecular & Farmacogenética, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Marysol Alvear
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería, Ciencias y Administración, Universidad de La Frontera, Temuco, Chile
| | - Alejandro Cuevas
- Centro de Biología Molecular & Farmacogenética, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Nicolás Saavedra
- Centro de Biología Molecular & Farmacogenética, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Luis A. Salazar
- Centro de Biología Molecular & Farmacogenética, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
- Centro de Excelencia en Estudios Genéticos e Inmunológicos, Universidad de La Frontera, Temuco, Chile
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Kumar S, Sharma S, Chattopadhyay SK. The potential health benefit of polyisoprenylated benzophenones from Garcinia and related genera: Ethnobotanical and therapeutic importance. Fitoterapia 2013; 89:86-125. [DOI: 10.1016/j.fitote.2013.05.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 05/09/2013] [Accepted: 05/10/2013] [Indexed: 10/26/2022]
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26
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Miguel MG, Antunes MD. Is propolis safe as an alternative medicine? J Pharm Bioallied Sci 2012; 3:479-95. [PMID: 22219581 PMCID: PMC3249695 DOI: 10.4103/0975-7406.90101] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Revised: 04/10/2011] [Accepted: 05/20/2011] [Indexed: 01/09/2023] Open
Abstract
Propolis is a resinous substance produced by honeybees as defense against intruders. It has relevant therapeutic properties that have been used since ancient times. Nowadays, propolis is of increasing importance as a therapeutic, alone or included in many medicines and homeopathic products or in cosmetics. Propolis is produced worldwide and honeybees use the flora surrounding their beehives for its production. Therefore its chemical composition may change according to the flora. The phenolic and volatile fractions of propolis have been revised in the present study, as well as some of the biological properties attributed to this natural product. An alert is given about the need to standardize this product, with quality control. This has already been initiated by some authors, mainly in the propolis from the poplar-type. Only this product can constitute a good complementary and alternative medicine under internationally acceptable quality control.
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Affiliation(s)
- Maria Graça Miguel
- Faculty of Sciences and Technology, Department of Chemistry and Pharmacy, University of Algarve, IBB, Center for Plant Biotechnology, Building 8, Campus de Gambelas, 8005-139 Faro, Portugal
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Tang WZ, Ma SG, Qu J, Yu SS, Liu YB, Su DM, Liu J. Dimeric prenylated C6-C3 compounds from the stem bark of Illicium oligandrum. JOURNAL OF NATURAL PRODUCTS 2011; 74:1268-1271. [PMID: 21524101 DOI: 10.1021/np100651n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Three new dimeric prenylated C6-C3 compounds, namely, illicidiones A (1), B (2), and C (3), were isolated from the stem bark of Illicium oligandrum. The structure and absolute configuration of these compounds were determined by extensive spectroscopic and chemical analyses, including NMR, modified Mosher method, and single-crystal X-ray study. Compounds 1-3 exhibited weak anti-inflammatory activities.
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Affiliation(s)
- Wen-Zhao Tang
- Key Laboratory of Bioactive Substance and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Xian nong tan Street, 100050, Beijing, People's Republic of China
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Garnsey MR, Matous JA, Kwiek JJ, Coltart DM. Asymmetric total synthesis of (+)- and (-)-clusianone and (+)- and (-)-clusianone methyl enol ether via ACC alkylation and evaluation of their anti-HIV activity. Bioorg Med Chem Lett 2011; 21:2406-9. [PMID: 21414776 PMCID: PMC3070777 DOI: 10.1016/j.bmcl.2011.02.074] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 02/15/2011] [Accepted: 02/16/2011] [Indexed: 11/21/2022]
Abstract
The total asymmetric synthesis of (+)- and (-)-clusianone and (+)- and (-)-clusianone methyl enol ether is reported. Asymmetric induction is achieved through the use of ACC alkylation, providing the key intermediates with an er of 99:1. The four synthetic compounds were evaluated for their anti-HIV activity. Both (+)- and (-)-clusianone displayed significant anti-HIV activity.
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Márquez Hernández I, Cuesta-Rubio O, Campo Fernández M, Rosado Pérez A, Montes de Oca Porto R, Piccinelli AL, Rastrelli L. Studies on the constituents of yellow Cuban propolis: GC-MS determination of triterpenoids and flavonoids. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:4725-4730. [PMID: 20230059 DOI: 10.1021/jf904527n] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this study, on the basis of the information supplied by NMR and HPLC-PDA data, we reported a quali-quantitative GC-MS study of 19 yellow Cuban propolis (YCP) samples collected in different regions of Cuba. The profiles of YCP samples allowed us to define two main types of YCP directly related to their secondary metabolite classes: type A, rich in triterpenic alcohols and with the presence of polymethoxylated flavonoids as minor constituents, and type B, containing acetyl triterpenes as the main constituents. For the first time, triterpenoids belonging to oleanane, lupane, ursane, and lanostane skeletons were reported as major compounds in propolis. Also, the presence of polymethoxylated flavones or flavanones was found for the first time in propolis.
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Affiliation(s)
- Ingrid Márquez Hernández
- Instituto de Farmacia y Alimentos (IFAL), Universidad de La Habana., La Lisa, Ciudad de La Habana, Cuba
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Popolo A, Piccinelli LA, Morello S, Cuesta-Rubio O, Sorrentino R, Rastrelli L, Pinto A. Antiproliferative Activity of Brown Cuban Propolis Extract on Human Breast Cancer Cells. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900401221] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Brown Cuban propolis (BCP) is the major type of propolis in Cuba; its chemical composition is exclusive and the principal component is nemorosone. In this study we investigated the antiproliferative activity of the ethanol extract of BCP on human breast cancer cell lines. The MTT assay showed a significant antiproliferative activity (P<0.005) of BCP on MCF-7 (estrogen receptor positive ER+) rather than MDA-MB 23 1 (ER-). This effect was concentration- (1-25 μg/mL) and time- (24-48 h) dependent, but it is only partially attributable to apoptosis. Indeed, our data showed that BCP administration to MCF-7 caused a significant (P>0.01) inhibition of cell growth in the G1 phase of cell cycle, which was mechanism dose- and time-dependent. 17-β Estradiol (10 nM) administration to MCF-7 caused a significant (P<0.001), but not total reduction of BCP antiproliferative activity at concentrations of 1, 5 and 10 μg/mL, but not at the highest concentration (25 μg/mL). The coadministration of ICI 182,780 (100nM), an antagonist of ER, on MCF-7 totally reduced the effect of BCP at 24 h, and showed a significant (P<0.001) reduction of BCP antiproliferative activity at 48 h. Thus it was hypothesized that BCP possesses an estrogen-like activity. It is to be noted, however, that BCP application to MDA-MB 23 1 at 48 h also induced increased cell mortality. Thus, it cannot be ruled out that BCP could not only interact with the ER, but also have an ER-independent activity.
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Affiliation(s)
- Ada Popolo
- Department of Pharmaceutical Sciences Via Ponte Don Melillo 84135 Fisciano, Salerno, Italy
| | - Lisa Anna Piccinelli
- Department of Pharmaceutical Sciences Via Ponte Don Melillo 84135 Fisciano, Salerno, Italy
| | - Silvana Morello
- Instituto de Farmacia y Alimentos (IFAL), Universidad de La Habana, La Habana, Cuba
| | - Osmany Cuesta-Rubio
- Department of Pharmaceutical Sciences Via Ponte Don Melillo 84135 Fisciano, Salerno, Italy
| | - Rosalinda Sorrentino
- Department of Pharmaceutical Sciences Via Ponte Don Melillo 84135 Fisciano, Salerno, Italy
| | - Luca Rastrelli
- Department of Pharmaceutical Sciences Via Ponte Don Melillo 84135 Fisciano, Salerno, Italy
| | - Aldo Pinto
- Department of Pharmaceutical Sciences Via Ponte Don Melillo 84135 Fisciano, Salerno, Italy
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Piccinelli AL, Campone L, Dal Piaz F, Cuesta-Rubio O, Rastrelli L. Fragmentation pathways of polycyclic polyisoprenylated benzophenones and degradation profile of nemorosone by multiple-stage tandem mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2009; 20:1688-1698. [PMID: 19540134 DOI: 10.1016/j.jasms.2009.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Revised: 05/07/2009] [Accepted: 05/08/2009] [Indexed: 05/27/2023]
Abstract
Nemorosone is a polycyclic polyisoprenylated benzophenone (PPBs) with strong cytotoxic activity. It is the major constituent of Clusia rosea floral resin and brown Cuban propolis. Other PPBs found in Cuban propolis are oxidized and cyclized derivatives of nemorosone. The instability of PPBs carrying an enolizable 1,3-diketone system has been suggested, and the elucidation of this aspect is very fundamental for the evaluation of their biologic activity. Electrospray ionization multistage tandem mass spectrometry (ESI-MS(n)) was employed to shed light on the origin of these derivatives of nemorosone and to define the stability of this natural product. For this purpose, we initially performed MS(n) experiments on seven related PPBs to obtain useful information for structural characterization of this class of compounds and to identify the degradation products of nemorosone. The proposed fragmentation pathways, supported by exact mass measurements, allowed the nature of side chains on the bicyclo core and the type and position of their modifications to be established. In a second part, the degradation profile of nemorosone under different conditions was investigated to assess the possible effects of isolation procedures, climatic, and storage conditions on its stability. Our results reveal that nemorosone undergoes rapid degradation in n-hexane and chloroform solutions. The degradation products, identified by HPLC-ESI/MS(n) and NMR, are identical to derivatives of nemorosone previously isolated from propolis and plants. Thus, these PPBs are artefacts formed predominantly during the extraction and purification procedures.
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Affiliation(s)
- Anna Lisa Piccinelli
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Salerno, Fisciano, Italy.
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Castro ML, Vilela WR, Zauli RC, Ikegaki M, Rehder VLG, Foglio MA, de Alencar SM, Rosalen PL. Bioassay guided purification of the antimicrobial fraction of a Brazilian propolis from Bahia state. Altern Ther Health Med 2009; 9:25. [PMID: 19643008 PMCID: PMC2731721 DOI: 10.1186/1472-6882-9-25] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Accepted: 07/30/2009] [Indexed: 11/29/2022]
Abstract
Background Brazilian propolis type 6 (Atlantic forest, Bahia) is distinct from the other types of propolis especially due to absence of flavonoids and presence of other non-polar, long chain compounds, but presenting good in vitro and in vivo antimicrobial activity. Several authors have suggested that fatty acids found in this propolis might be responsible for its antimicrobial activity; however, so far no evidence concerning this finding has been reported in the literature. The goals of this study were to evaluate the antibacterial activity of the main pure fatty acids in the ethanolic extract and fractions and elucidate the chemical nature of the bioactive compounds isolated from Brazilian propolis type 6. Methods Brazilian propolis type 6 ethanolic extract (EEP), hexane fraction (H-Fr), major fatty acids, and isolated sub-fractions were analyzed using high performance liquid chromatography (HPLC), high resolution gas chromatography with flame ionization detection (HRGC-FID), and gas chromatography-mass spectrometry (GC-MS). Three sub-fractions of H-Fr were obtained through preparative HPLC. Antimicrobial activity of EEP, H-Fr, sub-fractions, and fatty acids were tested against Staphyloccus aureus ATCC 25923 and Streptococcus mutans Ingbritt 1600 using minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). Results EEP and H-Fr inhibited the growth of the microorganisms tested; nevertheless, no antimicrobial activity was found for the major fatty acids. The three sub-fractions (1, 2, and 3) were isolated from H-Fr by preparative HPLC and only sub-fraction 1 showed antimicrobial activity. Conclusion a) The major fatty acids tested were not responsible for the antimicrobial activity of propolis type 6; b) Sub-fraction 1, belonging to the benzophenone class, was responsible for the antimicrobial activity observed in the present study. The identification of the bioactive compound will improve the development of more efficient uses of this natural product.
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Khanum SA, Shashikanth S, Sathyanarayana SG, Lokesh S, Deepak SA. Synthesis and antifungal activity of 2-azetidinonyl-5-(2-benzoylphenoxy)methyl-1,3,4-oxadiazoles against seed-borne pathogens of Eleusine coracana (L.) Gaertn. PEST MANAGEMENT SCIENCE 2009; 65:776-780. [PMID: 19319825 DOI: 10.1002/ps.1752] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
BACKGROUND Finger millet is a major food crop as well as feed and fodder for livestock, especially in regions of southern India. A sturdy crop to fluctuating environmental conditions, it can be cultivated in all seasons of the year. Leaf, neck and finger blast caused by Pyricularia grisea Sacc. and Bipolaris setariae (Saw.) Shoem, as well as leaf spot disease, Bipolaris nodulosa (Berk & M.A.Curtis) Shoem, are major production constraints in southern India. Apart from environmental conditions, the use of harvested seeds by farmers is a major reason for disease prevalence. Benzophenone analogues have been investigated for controlling phytopathogenic fungi. In addition, the most important applications of azetidin-2-ones are as antibiotics. Based on this information, the present study was conducted to explore the antifungal activity of integrated 2-azetidinonyl and 1,3,4-oxadiazoles moieties into a benzophenone framework. RESULTS A simple high-yielding method for the integration of heterocyclic rings, namely 2-azetidinonyl, at the benzophenone nucleus has been achieved, starting from substituted 2-hydroxybenzophenones under mild conditions on a wet solid surface using microwave irradiation. In the present study, an array of newly synthesised compounds, 2-azetidinonyl-5-(2-benzoylphenoxy)methyl-1,3,4-oxadiazoles, were screened for their antifungal property against blast and leaf spot causing fungi associated with the seeds of finger millet, cv. Indof-9. CONCLUSION Two of the newly synthesised compounds showed promising effects in depleting the incidence of seed-borne pathogenic fungi of finger millet. The suppression of Pyricularia grisea and Bipolaris setariae resulted in enhanced seed germination and seedling growth.
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Affiliation(s)
- Shaukath A Khanum
- Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India.
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Arif T, Bhosale JD, Kumar N, Mandal TK, Bendre RS, Lavekar GS, Dabur R. Natural products--antifungal agents derived from plants. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2009; 11:621-38. [PMID: 20183299 DOI: 10.1080/10286020902942350] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A new spectrum of human fungal infections is increasing due to increased cancer, AIDS, and immunocompromised patients. The increased use of antifungal agents also resulted in the development of resistance to the present drugs. It makes necessary to discover new classes of antifungal compounds to cure fungal infections. Plants are rich source of bioactive secondary metabolites of wide variety such as tannins, terpenoids, saponins, alkaloids, flavonoids, and other compounds, reported to have in vitro antifungal properties. Since the plant kingdom provides a useful source of lead compounds of novel structure, a wide-scale investigation of species from the tropics has been considered. Therefore, the research on natural products and compounds derived from natural products has accelerated in recent years due to their importance in drug discovery. A series of molecules with antifungal activity against different strains of fungus have been found in plants, which are of great importance to humans. These molecules may be used directly or considered as a precursor for developing better molecules. This review attempts to summarize the current status of important antifungal compounds from plants.
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Affiliation(s)
- Tasleem Arif
- Regional Research Institute (Ay), Central Council for Research in Ayurveda and Siddha, Pune, India
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Identification of a bioactive compound isolated from Brazilian propolis type 6. Bioorg Med Chem 2009; 17:5332-5. [PMID: 19497755 DOI: 10.1016/j.bmc.2009.04.066] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 04/28/2009] [Accepted: 04/29/2009] [Indexed: 11/23/2022]
Abstract
A prenylated benzophenone, hyperibone A, was isolated from the hexane fraction of Brazilian propolis type 6. Its structure was determined by spectral analysis including 2D NMR. This compound exhibited cytotoxic activity against HeLa tumor cells (IC(50)=0.1756microM), strong antimicrobial activity (MIC range-0.73-6.6microg/mL; MBC range-2.92-106microg/mL) against Streptococcus mutans, Streptococcus sobrinus, Streptococcus oralis, Staphylococcus aureus, and Actinomyces naeslundii, and the results of its cytotoxic and antimicrobial activities were considered good.
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36
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Naldoni F, Claudino A, Cruz J, Chavasco J, e Silva PF, Veloso M, Santos MD. Antimicrobial Activity of Benzophenones and Extracts from the Fruits of Garcinia brasiliensis. J Med Food 2009; 12:403-7. [DOI: 10.1089/jmf.2007.0622] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- F.J. Naldoni
- Laboratório de Fitoquímica e Química Medicinal, Departamento de Farmácia, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
| | - A.L.R. Claudino
- Laboratório de Microbiologia Básica e Imunologia, Departamento de Ciências Biológicas, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
| | - J.W. Cruz
- Laboratório de Fitoquímica e Química Medicinal, Departamento de Farmácia, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
| | - J.K. Chavasco
- Laboratório de Microbiologia Básica e Imunologia, Departamento de Ciências Biológicas, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
| | - P.M. Faria e Silva
- Laboratório de Microbiologia Básica e Imunologia, Departamento de Ciências Biológicas, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
| | - M.P. Veloso
- Laboratório de Fitoquímica e Química Medicinal, Departamento de Farmácia, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
| | - M.H. Dos Santos
- Laboratório de Fitoquímica e Química Medicinal, Departamento de Farmácia, Universidade Federal de Alfenas, Alfenas, Minas Gerais, Brazil
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37
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Hegazi AG, Abd El Hady FK, Shalaby HA. Inhibitory effect of Egyptian propolis on Fasciola gigantica eggs with reference to its effect on Clostridium oedematiens and correlation to chemical composition. Pak J Biol Sci 2009; 10:3295-305. [PMID: 19090144 DOI: 10.3923/pjbs.2007.3295.3305] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The chemical composition of the propolis samples was investigated by GC/MS and HPLC. 91 compounds have been identified, 26 compounds are being new to propolis. Siwa oasis propolis was characterized by the presence of diprenyl-dihydrocoumaric acids (4.15%), coumarate esters (10.93%), benzofuran lignans (13.47%) and valeric acids derivatives (11.42%). Matrooh sample was characterized by the presence of new ferulate esters, hydroxy acetophenones and furanon derivatives, furofuran lignans and sterol from pregnane type. Dakahlia propolis was a typical poplar propolis. The present study proved evidence of inhibitory activity of propolis on the vitality and hatchability of immature F. gigantica eggs, where three different localities in Egypt were tested for this purpose. The Siwa propolis showed the highest inhibitory effect than the other sources. The complete failure of development and death of all immature eggs were recorded at concentration of 200 microg mL(-1) of Siwa, 400 microg mL(-1) of Matrooh and 800 microg mL(-1) of Dakahlia propolis. The exposed F. gigantica egg shell revealed the same features as the non exposed egg shell when scanning with the electron microscopy. The three propolis samples showed inhibition in the growth of associated bacterium Clostridium oedematiens (Clostridium novyi) type B to fascioliasis. The inhibition varied according to the propolis origin.
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Affiliation(s)
- Ahmed G Hegazi
- Department of Zoonotic Diseases, National Research Center, Giza, Egypt
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38
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Derogis PBMC, Martins FT, de Souza TC, de C Moreira ME, Souza Filho JD, Doriguetto AC, de Souza KRD, Veloso MP, Dos Santos MH. Complete assignment of the 1H and 13C NMR spectra of garciniaphenone and keto-enol equilibrium statements for prenylated benzophenones. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46:278-282. [PMID: 18236418 DOI: 10.1002/mrc.2166] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
This article reports the structural elucidation by IR, UV and MS spectroscopic data along with 1H and 13C NMR chemical shift assignments of two benzophenones isolated from the fruit pericarp of Garcinia brasiliensis Mart. (Clusiaceae): garciniaphenone, (1R,5S,7S)-3-benzoyl-4-hydroxy-6,6-dimethyl-5,7-di(3-methyl-2-butenyl)bicyclo[3.3.1]non-3-ene-2,9-dione, a novel triprenylated benzophenone; and 7-epi-clusianone, a tetraprenylated benzophenone that has already been extracted from another species of the same family. Furthermore, the keto-enol tautomeric equilibrium at solution-state was described for these compounds by 1D and 2D NMR spectral methods and one attempt to rationalize the different ratios between the noted tautomers was based on stereochemical features.
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Affiliation(s)
- Priscilla B M C Derogis
- Departamento de Farmácia, Universidade Federal de Alfenas-UNIFAL-MG, Rua Gabriel Monteiro da Silva 714, CEP 37130-000, Alfenas, MG, Brazil
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39
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Affiliation(s)
- Roxana Ciochina
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA
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40
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Brito CM, Pinto DCGA, Silva AMS, Silva AMG, Tomé AC, Cavaleiro JAS. Diels–Alder Reactions of 2′-Hydroxychalcones withortho-Benzoquino-dimethane: A New Synthesis of 3-Aryl-2-naphthyl 2-Hydroxyphenyl Ketones. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500872] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Structural revision of clusianone and 7-epi-clusianone and anti-HIV activity of polyisoprenylated benzophenones. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.030] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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42
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Teixeira JSR, Cruz FG. Polyisoprenylated benzophenone derivatives from Clusia obdeltifolia. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.02.121] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Russo A, Cardile V, Sanchez F, Troncoso N, Vanella A, Garbarino JA. Chilean propolis: antioxidant activity and antiproliferative action in human tumor cell lines. Life Sci 2005; 76:545-58. [PMID: 15556167 DOI: 10.1016/j.lfs.2004.07.019] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2003] [Accepted: 07/02/2004] [Indexed: 11/19/2022]
Abstract
Propolis, a natural product derived from plant resins collected by honeybees, has been used for thousands of years in traditional medicine all over the world. The composition of the propolis depends upon the vegetation of the area from where it was collected and on the bee species. In this study, we investigated the antioxidant activity of a propolis sample, provided by NATURANDES-CHILE, collected in a temperate region of central Chile. In addition, this natural compound was tested for its antiproliferative capacity on KB (human mouth epidermoid carcinoma cells), Caco-2 (colon adenocarcinoma cells) and DU-145 (androgen-insensitive prostate cancer cells) human tumor cell lines. Results showed that this Chilean propolis sample exhibits interesting biological properties, correlated with its chemical composition and expressed by its capacity to scavenge free radicals and to inhibit tumor cell growth.
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Affiliation(s)
- A Russo
- Department of Biological Chemistry, Medical Chemistry and Molecular Biology, University of Catania, v.le A. Doria 6, 95125 Catania-Italy.
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Cuesta-Rubio O, Piccinelli AL, Rastrelli L. Chemistry and biological activity of polyisoprenylated benzophenone derivatives. BIOACTIVE NATURAL PRODUCTS (PART L) 2005. [DOI: 10.1016/s1572-5995(05)80066-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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45
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Baggett S, Mazzola EP, Kennelly EJ. The benzophenones: Isolation, structural elucidation and biological activities. BIOACTIVE NATURAL PRODUCTS (PART L) 2005. [DOI: 10.1016/s1572-5995(05)80067-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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46
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Liu B, Falkenstein-Paul H, Schmidt W, Beerhues L. Benzophenone synthase and chalcone synthase from Hypericum androsaemum cell cultures: cDNA cloning, functional expression, and site-directed mutagenesis of two polyketide synthases. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2003; 34:847-55. [PMID: 12795704 DOI: 10.1046/j.1365-313x.2003.01771.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Benzophenone derivatives, such as polyprenylated benzoylphloroglucinols and xanthones, are biologically active secondary metabolites. The formation of their C13 skeleton is catalyzed by benzophenone synthase (BPS; EC 2.3.1.151) that has been cloned from cell cultures of Hypericum androsaemum. BPS is a novel member of the superfamily of plant polyketide synthases (PKSs), also termed type III PKSs, with 53-63% amino acid sequence identity. Heterologously expressed BPS was a homodimer with a subunit molecular mass of 42.8 kDa. Its preferred starter substrate was benzoyl-CoA that was stepwise condensed with three malonyl-CoAs to give 2,4,6-trihydroxybenzophenone. BPS did not accept activated cinnamic acids as starter molecules. In contrast, recombinant chalcone synthase (CHS; EC 2.3.1.74) from the same cell cultures preferentially used 4-coumaroyl-CoA and also converted CoA esters of benzoic acids. The enzyme shared 60.1% amino acid sequence identity with BPS. In a phylogenetic tree, the two PKSs occurred in different clusters. One cluster was formed by CHSs including the one from H. androsaemum. BPS grouped together with the PKSs that functionally differ from CHS. Site-directed mutagenesis of amino acids shaping the initiation/elongation cavity of CHS yielded a triple mutant (L263M/F265Y/S338G) that preferred benzoyl-CoA over 4-coumaroyl-CoA.
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Affiliation(s)
- Benye Liu
- Institut für Pharmazeutische Biologie, Mendelssohnstrasse 1, D-38106 Braunschweig, Germany
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47
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Matsuhisa M, Shikishima Y, Takaishi Y, Honda G, Ito M, Takeda Y, Shibata H, Higuti T, Kodzhimatov OK, Ashurmetov O. Benzoylphloroglucinol derivatives from Hypericum scabrum. JOURNAL OF NATURAL PRODUCTS 2002; 65:290-294. [PMID: 11908967 DOI: 10.1021/np010310a] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Nine new polyprenylated benzoylphloroglucinol derivatives, hyperibones A-I (1-9), were isolated from the aerial parts of the Uzbekistan medicinal plant Hypericum scabrum. Their structures were determined mainly on the basis of spectroscopic evidence (2D NMR and HRMS). Compounds 1, 2, and 4 showed mild in vitro antibacterial activity against methicillin-resistance Staphylococus aureus (MRSA) and methicillin-sensitive Staphylococus aureus (MSSA).
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Affiliation(s)
- Michiko Matsuhisa
- Faculty of Pharmaceutical Sciences, University of Tokushima, Shomachi 1-78, Tokushima, 770-8505, Japan
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Abstract
Propolis is a resinous hive product collected by honeybees from various plant sources. It is a popular folk medicine possessing a broad spectrum of biological activities. It has also been used as a health drink in various Asian, European and American countries. Several groups of researchers have focused their attention on the biological activity of propolis and its active principles. Many scientific articles are published every year in different international journals related to the pharmacological properties of propolis. This review article compiles recent findings (since 1995) on the pharmacological properties of propolis focusing on its antihepatotoxic, antitumour, antioxidative, antimicrobial and antiinflammatory properties. The possible mechanism of action of propolis as well as the active compounds are discussed.
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Affiliation(s)
- A H Banskota
- Department of Natural Products Chemistry, Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, 2630-Sugitani, Toyama 930-0194, Japan
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Winkelmann K, Heilmann J, Zerbe O, Rali T, Sticher O. New prenylated bi- and tricyclic phloroglucinol derivatives from Hypericum papuanum. JOURNAL OF NATURAL PRODUCTS 2001; 64:701-706. [PMID: 11421727 DOI: 10.1021/np0006364] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Five new prenylated tricyclic and three new bicyclic acylphloroglucinol derivatives have been isolated by bioactivity-guided fractionation of the petroleum ether extract of the dried aerial parts of Hypericum papuanum. The tricyclic compounds (1--5) were named papuaforins A--E. The bicyclic compounds were isolated together with their corresponding tautomers and were named hyperguinones A and B (6/6a,7/7a) and hyperpapuanone (8/8a), respectively. Their structures were elucidated on the basis of extensive 1D and 2D NMR experiments, as well as mass spectrometry. Furthermore, the cytotoxicity toward KB nasopharyngeal carcinoma cells and the antibacterial activity of the isolated compounds were determined.
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Affiliation(s)
- K Winkelmann
- Department of Applied BioSciences, Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology (ETH) Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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50
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Cuesta-Rubio O, Velez-Castro H, Frontana-Uribe BA, Cardenas J. Nemorosone, the major constituent of floral resins of Clusia rosea. PHYTOCHEMISTRY 2001; 57:279-283. [PMID: 11382245 DOI: 10.1016/s0031-9422(00)00510-0] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Nemorosone, the major constituent of the floral resin of Clusia rosea was isolated after exhaustive chromatography. This compound was fully characterized as it is in the nature, without methylation as reported before. A keto-enol equilibrium was observed and both isomers were totally characterized by NMR spectroscopic techniques. The previously announced structure for methylnemorosone was corrected on the basis of application of chemical methylation, high field 2D NMR techniques and NOE difference spectroscopy experiments on the natural product. Our studies concluded that an interchange occurred in the assignment of the benzoyl moiety position with an isoprenyl group in that structure.
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Affiliation(s)
- O Cuesta-Rubio
- Instituto de Farmacia y Alimentos, Universidad de la Habana, Cuba
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