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Structural Characterization of Zinc and Cadmium Complexes Derived from N-(4-carboxybenzyl)pyridinium: Revisiting the Structure of (Cbp)2ZnBr2 and Influence of the Metal on Carboxylate Coordination Mode. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2
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Quek A, Mohd Zaini H, Kassim NK, Sulaiman F, Rukayadi Y, Ismail A, Zainal Abidin Z, Awang K. Oxygen radical antioxidant capacity (ORAC) and antibacterial properties of Melicope glabra bark extracts and isolated compounds. PLoS One 2021; 16:e0251534. [PMID: 33970960 PMCID: PMC8109830 DOI: 10.1371/journal.pone.0251534] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/22/2021] [Indexed: 11/18/2022] Open
Abstract
Melicope glabra (Blume) T. G. Hartley from the Rutaceae family is one of the richest sources of plant secondary metabolites, including coumarins and flavanoids. This study investigates the free radical scavenging and antibacterial activities of M. glabra and its isolated compounds. M. glabra ethyl acetate and methanol extracts were prepared using the cold maceration technique. The isolation of compounds was performed with column chromatography. The free radical scavenging activity of the extracts and isolated compounds were evaluated based on their oxygen radical absorbance capacity (ORAC) activities. The extracts and compounds were also subjected to antibacterial evaluation using bio-autographic and minimal inhibitory concentration (MIC) techniques against two oral pathogens, Enterococcus faecalis and Streptococcus mutans. Isolation of phytoconstituents from ethyl acetate extract successfully yielded quercetin 3, 5, 3’-trimethyl ether (1) and kumatakenin (2), while the isolation of the methanol extract resulted in scoparone (3), 6, 7, 8-trimethoxycoumarin (4), marmesin (5), glabranin (6), umbelliferone (7), scopoletin (8), and sesamin (9). The study is the first to isolate compound (1) from Rutaceae plants, and also the first to report the isolation of compounds (2–5) from M. glabra. The ORAC evaluation showed that the methanol extract is stronger than the ethyl acetate extract, while umbelliferone (7) exhibited the highest ORAC value of 24 965 μmolTE/g followed by glabranin (6), sesamin (9) and scopoletin (8). Ethyl acetate extract showed stronger antibacterial activity towards E. faecalis and S. mutans than the methanol extract with MIC values of 4166.7 ± 1443.4 μg/ml and 8303.3 ± 360.8 μg/ml respectively. Ethyl acetate extract inhibited E. faecalis growth, as shown by the lowest optical density value of 0.046 at a concentration of 5.0 mg/mL with a percentage inhibition of 95%. Among the isolated compounds tested, umbelliferone (7) and sesamin (9) exhibited promising antibacterial activity against S. mutans with both exhibiting MIC values of 208.3 ± 90.6 μg/ml. Findings from this study suggests M. glabra as a natural source of potent antioxidant and antibacterial agents.
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Affiliation(s)
- Alexandra Quek
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Hafizah Mohd Zaini
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Nur Kartinee Kassim
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Integrated Chemical BioPhysic Research, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- * E-mail:
| | - Fadzil Sulaiman
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Yaya Rukayadi
- Laboratory of Natural Products, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Amin Ismail
- Department of Dietetics, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Zamirah Zainal Abidin
- Department of Oral Clinical Biology, Faculty of Dentistry, Universiti Kebangsaan Malaysia Kuala Lumpur, Kuala Lumpur, Malaysia
| | - Khalijah Awang
- Department of Chemistry, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
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Thengyai S, Thiantongin P, Sontimuang C, Ovatlarnporn C, Puttarak P. α-Glucosidase and α-amylase inhibitory activities of medicinal plants in Thai antidiabetic recipes and bioactive compounds from Vitex glabrata R. Br. stem bark. J Herb Med 2020. [DOI: 10.1016/j.hermed.2019.100302] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Somtimuang C, Olatunji OJ, Ovatlarnporn C. Evaluation of In Vitro α
-Amylase and α
-Glucosidase Inhibitory Potentials of 14 Medicinal Plants Constituted in Thai Folk Antidiabetic Formularies. Chem Biodivers 2018; 15:e1800025. [DOI: 10.1002/cbdv.201800025] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 02/14/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Chonlatid Somtimuang
- Faculty of Traditional Thai Medicine; Prince of Songkla University; Hat Yai 90112 Thailand
| | | | - Chitchamai Ovatlarnporn
- Department of Pharmaceutical Chemistry; Faculty of Pharmaceutical Sciences; Prince of Songkla University; Hat Yai 90112 Thailand
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Maize Fungal Growth Control with Scopoletin of Cassava Roots Produced in Benin. Int J Microbiol 2017; 2017:5671942. [PMID: 28197207 PMCID: PMC5286496 DOI: 10.1155/2017/5671942] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 11/20/2016] [Accepted: 12/22/2016] [Indexed: 11/17/2022] Open
Abstract
The chemical contamination of food is among the main public health issues in developing countries. With a view to find new natural bioactive products against fungi responsible for chemical contamination of staple food such as maize, the antifungal activity tests of scopoletin extracted from different components of the cassava root produced in Benin were carried out. The dosage of scopoletin from parts of the root (first skin, second skin, whole root, and flesh) was done by High Performance Liquid Chromatography. The scopoletin extract was used to assess the activity of 12 strains (11 strains of maize and a reference strain). The presence of scopoletin was revealed in all components of the cassava root. Scopoletin extracted from the first skin cassava root was the most active both as inhibition of sporulation (52.29 to 87.91%) and the mycelial growth (36.51-80.41%). Scopoletin extract from the cassava root skins showed significant inhibitory activity on the tested strains with fungicide concentration (MFC) between 0.0125 mg/mL and 0.1 mg/mL. The antifungal scopoletin extracted from the cassava root skins may be well beneficial for the fungal control of the storage of maize.
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Xu RX, Gao S, Zhao Y, Lou HX, Cheng AX. Functional characterization of a Mg(2+)-dependent O-methyltransferase with coumarin as preferred substrate from the liverwort Plagiochasma appendiculatum. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 106:269-277. [PMID: 27213954 DOI: 10.1016/j.plaphy.2016.05.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 05/13/2016] [Accepted: 05/13/2016] [Indexed: 06/05/2023]
Abstract
Coumarins (1,2-benzopyrones), which originate via the phenylpropanoid pathway, are found ubiquitously in plants and make an essential contribution to the health of the plant. Some natural coumarins have been used as human therapeutics. However, the details of their biosynthesis are still largely unknown. Scopoletin is derived from either esculetin or feruloyl CoA according to the plant species involved. Here, a gene encoding a O-methyltransferase (PaOMT2) was isolated from the liverwort species Plagiochasma appendiculatum (Aytoniaceae) through transcriptome sequencing. The purified recombinant enzyme catalyzed the methylation of esculetin, generating scopoletin and isoscopoletin. Kinetic analysis shows that the construct from the second Met in PaOMT2 had a catalytic efficiency for esculetin (Kcat/Km) of about half that of the full length PaOMT2, while the Kms of two enzymes were similar. The catalytic capacities of the studied protein suggest that two routes to scopoletin might co-exist in liverworts in that the enzyme involved in the methylation process participates in both paths, but especially the route from esculetin. The transient expression of a PaOMT2-GFP fusion in tobacco demonstrated that PaOMT2 is directed to the cytoplasm.
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Affiliation(s)
- Rui-Xue Xu
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Shuai Gao
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Yu Zhao
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Hong-Xiang Lou
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | - Ai-Xia Cheng
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China.
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Synthesis and anti-acetylcholinesterase activity of scopoletin derivatives. Bioorg Chem 2015; 65:137-45. [PMID: 26943478 DOI: 10.1016/j.bioorg.2015.12.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 11/18/2015] [Accepted: 12/06/2015] [Indexed: 11/23/2022]
Abstract
A series of scopoletin derivatives incorporated with the pyridinium moiety was synthesized and evaluated for their acetylcholinesterase (AChE) inhibitory activity by the colorimetric Ellman's method. A 2-fluorobenzylpyridinium derivative was the most potent among the tested compounds, with an IC50 value of 0.215±0.015μM, which was greatly improved from that of scopoletin. Docking studies revealed that the scopoletin portion of the mentioned compound was bound to the peripheral anionic site of the AChE, whereas the N-benzylpyridinium residue to the catalytic anionic site.
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Rapid validated high performance thin layer chromatography method for simultaneous estimation of mangiferin and scopoletin in Canscora decussata (South Indian Shankhpushpi) extract. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2015. [DOI: 10.1016/j.bjp.2015.04.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wibowo A, Ahmat N. Chemotaxonomic significance of oligostilbenoids isolated from Dryobalanops in the taxonomic of Dipterocarpaceae. BIOCHEM SYST ECOL 2015. [DOI: 10.1016/j.bse.2014.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sun H, Wang L, Zhang B, Ma J, Hettenhausen C, Cao G, Sun G, Wu J, Wu J. Scopoletin is a phytoalexin against Alternaria alternata in wild tobacco dependent on jasmonate signalling. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:4305-15. [PMID: 24821958 PMCID: PMC4112635 DOI: 10.1093/jxb/eru203] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Alternaria alternata (tobacco pathotype) is a necrotrophic fungus causing severe losses in Nicotiana species by infection of mature leaves. Similar to what has been observed in cultivated tobacco, N. tabacum, young leaves of wild tobacco, N. attenuata, were more resistant to A. alternata than mature leaves, and this was correlated with stronger blue fluorescence induced after infection. However, the nature of the fluorescence-emitting compound, its role in defence, and its regulation were not clear. Silencing feruloyl-CoA 6'-hydroxylase 1 (F6'H1), the gene encoding the key enzyme for scopoletin biosynthesis, by virus-induced gene silencing (VIGS) revealed that the blue fluorescence was mainly emitted by scopoletin and its β-glycoside form, scopolin. Further analysis showed that scopoletin exhibited strong antifungal activity against A. alternata in vitro and in vivo. Importantly, jasmonic acid (JA) levels were highly elicited in young leaves but much less in mature leaves after infection; and fungus-elicited scopoletin was absent in JA-deficient plants, but was largely restored with methyl jasmonate treatments. Consistent with this, plants strongly impaired in JA biosynthesis and perception were highly susceptible to A. alternata in the same way scopoletin/scopolin-depleted VIGS F6'H1 plants. Furthermore, silencing MYC2, a master regulator of most JA responses, reduced A. alternata-induced NaF6'H1 transcripts and scopoletin. Thus, it is concluded that JA signalling is activated in N. attenuata leaves after infection, which subsequently regulates scopoletin biosynthesis for the defence against A. alternata partly through MYC2, and higher levels of scopoletin accumulated in young leaves account for their strong resistance.
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Affiliation(s)
- Huanhuan Sun
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Lei Wang
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Baoqin Zhang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Junhong Ma
- Yunnan Academy of Tobacco Agricultural Science, Yuantong Street 33, 650031, Kunming, China
| | - Christian Hettenhausen
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Guoyan Cao
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Guiling Sun
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Jianqiang Wu
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
| | - Jinsong Wu
- Key Laboratory of Economic Plants and Biotechnology, Kunming Institute of Botany, Chinese Academy of Sciences, Lanhei Road 132, 650201, Kunming, China
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Kassim NK, Rahmani M, Ismail A, Sukari MA, Ee GCL, Nasir NM, Awang K. Antioxidant activity-guided separation of coumarins and lignan from Melicope glabra (Rutaceae). Food Chem 2013; 139:87-92. [DOI: 10.1016/j.foodchem.2013.01.108] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 12/13/2012] [Accepted: 01/28/2013] [Indexed: 11/25/2022]
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12
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Gazis R, Chaverri P. Diversity of fungal endophytes in leaves and stems of wild rubber trees (Hevea brasiliensis) in Peru. FUNGAL ECOL 2010. [DOI: 10.1016/j.funeco.2009.12.001] [Citation(s) in RCA: 210] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Beh HK, Ismail Z, Asmawi MZ, Loh WS, Fun HK. 7-Hy-droxy-6-meth-oxy-2H-chromen-2-one. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2138. [PMID: 21588426 PMCID: PMC3007346 DOI: 10.1107/s1600536810029296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Accepted: 07/22/2010] [Indexed: 12/04/2022]
Abstract
The title compound, C10H8O4, is one of the coumarins existing in Morinda citrifolia L (Noni). The chromenone ring system is approximately planar with a maximum deviation of 0.0208 (14) Å. The methoxy group does not deviate from this plane [C—O—C—C torsion angle = −1.5 (3)°], indicating that the whole molecule is almost planar. In the crystal packing, intermolecular O—H⋯O hydrogen bonds link the molecules into chains. These are further connected by C—H⋯O hydrogen bonds.
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Ngoumfo RM, Ngounou GE, Tchamadeu CV, Qadir MI, Mbazoa CD, Begum A, Ngninzeko FN, Lontsi D, Choudhary MI. Inhibitory effect of macabarterin, a polyoxygenated ellagitannin from Macaranga barteri, on human neutrophil respiratory burst activity. JOURNAL OF NATURAL PRODUCTS 2008; 71:1906-1910. [PMID: 19006373 DOI: 10.1021/np8004634] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An ellagitannin with a 2,4-acyl group, named macabarterin (1), and a new ellagic acid glycoside, 3-O-methylellagic acid 4-O-β-d-xylopyranoside (2), were isolated from the stem bark extract of Macaranga barteri along with five known phenolic compounds, ellagic acid (3), 3-O-methylellagic acid (4), gallic acid (5), methyl gallate (6), and scopoletin (7). The structures of 1 and 2, as well as those of the known compounds, were elucidated on the basis of spectroscopic data and by comparison with reported data. Compounds 1-5 and 7 were tested for their anti-inflammatory potential in a cell-based respiratory burst assay, compound 1 being found an inhibitor of the superoxides produced in the cellular system.
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Affiliation(s)
- Rostand Manfouo Ngoumfo
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon.
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