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Macaúbas-Silva C, Félix MDG, Aquino AKSD, Pereira-Júnior PG, Brito EVDO, Oliveira-Filho AAD, Igoli JO, Watson DG, Teles YCF. Araçain, a tyrosol derivative and other phytochemicals from Psidium guineense Sw. Nat Prod Res 2019; 35:2424-2428. [PMID: 31581838 DOI: 10.1080/14786419.2019.1672683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Psidium guineense Sw. (Myrtaceae) is a shrub distributed all over South America and Brazil. Its leaves are traditionally used to treat digestive problems and infections. Several biological activities have been reported for P. guineense extracts, however phytochemical studies are scarce. The present study is on the isolation of compounds from P. guineense leaf extracts using chromatographic and spectroscopic techniques and evaluation of their antibacterial activity. Araçain, a tyrosol derivative was isolated as a natural product for the first time. Other compounds isolated were ursolic acid, a phaeophorbide and three flavonoids. The extracts were tested for their antimicrobial activity against Klebsiella pneumoniae strains and they showed moderate to high antibacterial activity.
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Affiliation(s)
- Camila Macaúbas-Silva
- Department of Chemistry and Physics, Agrarian Sciences Center, Universidade Federal da Paraíba, Areia, Brazil
| | - Maysa D G Félix
- Department of Chemistry and Physics, Agrarian Sciences Center, Universidade Federal da Paraíba, Areia, Brazil
| | - Ana Karoline S de Aquino
- Department of Chemistry and Physics, Agrarian Sciences Center, Universidade Federal da Paraíba, Areia, Brazil
| | - Paulo G Pereira-Júnior
- Department of Chemistry and Physics, Agrarian Sciences Center, Universidade Federal da Paraíba, Areia, Brazil
| | | | | | - John O Igoli
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - David G Watson
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - Yanna C F Teles
- Department of Chemistry and Physics, Agrarian Sciences Center, Universidade Federal da Paraíba, Areia, Brazil
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2
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Kutateladze AG, Holt T, Reddy DS. Natural Products Containing the Oxetane and Related Moieties Present Additional Challenges for Structure Elucidation: A DU8+ Computational Case Study. J Org Chem 2019; 84:7575-7586. [DOI: 10.1021/acs.joc.9b01005] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Andrei G. Kutateladze
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
| | - Tina Holt
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
| | - D. Sai Reddy
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States
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3
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Freitas S, Silva NG, Sousa ML, Ribeiro T, Rosa F, Leão PN, Vasconcelos V, Reis MA, Urbatzka R. Chlorophyll Derivatives from Marine Cyanobacteria with Lipid-Reducing Activities. Mar Drugs 2019; 17:md17040229. [PMID: 30999602 PMCID: PMC6520785 DOI: 10.3390/md17040229] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/11/2019] [Accepted: 04/14/2019] [Indexed: 12/12/2022] Open
Abstract
Marine organisms, particularly cyanobacteria, are important resources for the production of bioactive secondary metabolites for the treatment of human diseases. In this study, a bioassay-guided approach was used to discover metabolites with lipid-reducing activity. Two chlorophyll derivatives were successfully isolated, the previously described 132-hydroxy-pheophytin a (1) and the new compound 132-hydroxy-pheofarnesin a (2). The structure elucidation of the new compound 2 was established based on one- and two-dimensional (1D and 2D) NMR spectroscopy and mass spectrometry. Compounds 1 and 2 showed significant neutral lipid-reducing activity in the zebrafish Nile red fat metabolism assay after 48 h of exposure with a half maximal effective concentration (EC50) of 8.9 ± 0.4 µM for 1 and 15.5 ± 1.3 µM for 2. Both compounds additionally reduced neutral lipid accumulation in 3T3-L1 multicellular spheroids of murine preadipocytes. Molecular profiling of mRNA expression of some target genes was evaluated for the higher potent compound 1, which indicated altered peroxisome proliferator activated receptor gamma (PPARγ) mRNA expression. Lipolysis was not affected. Different food materials (Spirulina, Chlorella, spinach, and cabbage) were evaluated for the presence of 1, and the cyanobacterium Spirulina, with GRAS (generally regarded as safe) status for human consumption, contained high amounts of 1. In summary, known and novel chlorophyll derivatives were discovered from marine cyanobacteria with relevant lipid-reducing activities, which in the future may be developed into nutraceuticals.
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Affiliation(s)
- Sara Freitas
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
- FCUP, Faculty of Science, Department of Biology, University of Porto, Rua do Campo, Alegre, 4169-007 Porto, Portugal.
| | - Natália Gonçalves Silva
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Maria Lígia Sousa
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Tiago Ribeiro
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Filipa Rosa
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Pedro N Leão
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Vitor Vasconcelos
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
- FCUP, Faculty of Science, Department of Biology, University of Porto, Rua do Campo, Alegre, 4169-007 Porto, Portugal.
| | - Mariana Alves Reis
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
| | - Ralph Urbatzka
- Interdisciplinary Center of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal.
- FCUP, Faculty of Science, Department of Biology, University of Porto, Rua do Campo, Alegre, 4169-007 Porto, Portugal.
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4
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Coumarins and other components of Daphne oleoides Schreb. subsp. oleoides from Majella National Park. BIOCHEM SYST ECOL 2019. [DOI: 10.1016/j.bse.2018.12.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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5
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Dai W, Lu CQ, Wang Y, Lu Y, Chen DF, Wang Q. Oplopane Sesquiterpenes from Ligularia knorringiana
and Their Anti-Complementary Activity. Chem Biodivers 2018; 15:e1700515. [DOI: 10.1002/cbdv.201700515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/09/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Wei Dai
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education; School of Pharmacy; Shihezi University; Shihezi 832002 P. R. China
| | - Chuan-Qi Lu
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education; School of Pharmacy; Shihezi University; Shihezi 832002 P. R. China
| | - Yan Wang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education; School of Pharmacy; Shihezi University; Shihezi 832002 P. R. China
| | - Yan Lu
- Department of Pharmacognosy; School of Pharmacy; Fudan University; Shanghai 201203 P. R. China
| | - Dao-Feng Chen
- Department of Pharmacognosy; School of Pharmacy; Fudan University; Shanghai 201203 P. R. China
| | - Qi Wang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education; School of Pharmacy; Shihezi University; Shihezi 832002 P. R. China
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6
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Semaan DG, Igoli JO, Young L, Marrero E, Gray AI, Rowan EG. In vitro anti-diabetic activity of flavonoids and pheophytins from Allophylus cominia Sw . on PTP1B, DPPIV, alpha-glucosidase and alpha-amylase enzymes. JOURNAL OF ETHNOPHARMACOLOGY 2017; 203:39-46. [PMID: 28341245 DOI: 10.1016/j.jep.2017.03.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 03/09/2017] [Accepted: 03/13/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND Ethno-botanical information from diabetic patients in Cuba led to the identification of Allophylus cominia as a possible source of new drugs for the treatment of type 2 diabetes mellitus (T2-DM). EXPERIMENTAL Chemical characterization of the extracts from A. cominia was carried out using chromatographic and spectroscopic methods. The extracts were tested for their activity on PTP1B, DPPIV, α-glucosidase enzymes and α-amylase. RESULTS The flavonoid rich fractions from A. cominia inhibited DPPIV enzyme (75.3±2.33%) at 30µg/ml and produced a concentration-dependent inhibition against DPPIV with a Ki value of 2.6µg/ml. At 30µg/ml, flavonoids and pheophytins extracts significantly inhibited PTP1B enzyme (100±2.6% and 68±1% respectively). The flavonoids, pheophytin A and pheophytin B fractions showed significant concentration-dependent inhibition against PTP1B with Ki values of 3µg/ml, 0.64µg/ml and 0.88µg/ml respectively. At 30µg/ml, the flavonoid fraction significantly inhibited α-glucosidase enzyme (86±0.3%) in a concentration-dependent pattern with a Ki value of 2µg/ml. None of the fractions showed significant effects on α-amylase. Fatty acids, tannins, pheophytins A and B, and a mixture of flavonoids were detected in the methanolic extract from A. cominia. The identified flavonoids were mearnsitrin, quercitrin, quercetin-3-alloside, and naringenin-7-glucoside. CONCLUSION The pharmacological effects of the extracts from A. cominia earlier observed in experimental diabetic models was confirmed in this study. Thus a new drug or formulation for the treatment of T2-DM could be developed from A. cominia.
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Affiliation(s)
- D G Semaan
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom.
| | - J O Igoli
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom; Department of Chemistry, University of Agriculture, PMB 2373 Makurdi, Nigeria
| | - L Young
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - E Marrero
- National Centre for Animal and Plant Health (Centro Nacional de Sanidad Agropecuaria), San José de las Lajas, Mayabeque, Cuba
| | - A I Gray
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
| | - E G Rowan
- Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE, United Kingdom
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7
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Dai W, Li H, Cong W, Zhao W, Wang Q. Two New Eremophilane Sesquiterpenes and One New Resorcinol from Ligularia Knorringiana. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601100201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Two new eremophilane sesquiterpenes, 12-oxa-1β, 5β,8,9aβ-tetramethyl-4α,5-ethano-4aβ-hydroxy-7β,10aβ-epoxy-9β-angeloyloxy-1,2,3,4,4a,5,6,7,9,9a,10,10a-dodecahydro-anthracen-13-on (knorringianalarin A, 1) and 6,9-dien-8-oxoeremophil-12-nor-11-ketone (knorringianalarin B, 2), and a new resorcinol, 4-acetyl-6-(2-methylpropionyl)-1,3-resorcinol (knorringianalarin C, 3) were isolated from the roots and rhizomes of Ligularia knorringiana, together with three known eremophilane sesquiterpenes (4–6). The structures of the new compounds were identified by spectroscopic methods including 2D-NMR techniques.
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Affiliation(s)
- Wei Dai
- Key Laboratory of XinJiang Phytomedicine Resources, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Hui Li
- Key Laboratory of XinJiang Phytomedicine Resources, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Wenli Cong
- Key Laboratory of XinJiang Phytomedicine Resources, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Wenbin Zhao
- Key Laboratory of XinJiang Phytomedicine Resources, School of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Qi Wang
- Key Laboratory of XinJiang Phytomedicine Resources, School of Pharmacy, Shihezi University, Shihezi 832002, China
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