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Barrientos RE, Simirgiotis MJ, Palacios J, Paredes A, Bórquez J, Bravo A, Cifuentes F. Chemical Fingerprinting, Isolation and Characterization of Polyphenol Compounds from Heliotropium taltalense (Phil.) I.M. Johnst and Its Endothelium-Dependent Vascular Relaxation Effect in Rat Aorta. Molecules 2020; 25:molecules25143105. [PMID: 32650373 PMCID: PMC7397318 DOI: 10.3390/molecules25143105] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 06/26/2020] [Accepted: 07/01/2020] [Indexed: 12/13/2022] Open
Abstract
Heliotropium taltalense is an endemic species of the northern coast of Chile and is used as folk medicine. The polyphenolic composition of the methanolic and aqueous extract of the endemic Chilean species was investigated using Ultrahigh-Performance Liquid Chromatography, Heated Electrospray Ionization and Mass Spectrometry (UHPLC-Orbitrap-HESI-MS). Fifty-three compounds were detected, mainly derivatives of benzoic acid, flavonoids, and some phenolic acids. Furthermore, five major compounds were isolated by column chromatography from the extract, including four flavonoids and one geranyl benzoic acid derivative, which showed vascular relaxation and were in part responsible for the activity of the extracts. Since aqueous extract of H. taltalense (83% ± 9%, 100 μg/mL) produced vascular relaxation through an endothelium-dependent mechanism in rat aorta, and the compounds rhamnocitrin (89% ± 7%; 10−4 M) and sakuranetin (80% ± 6%; 10−4 M) also caused vascular relaxation similar to the extracts of H. taltalense, these pure compounds are, to some extent, responsible for the vascular relaxation.
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Affiliation(s)
- Ruth E. Barrientos
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile;
| | - Mario J. Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile;
- Correspondence: or (M.J.S.); (J.P.); Tel.: +56-63-63233257 (M.J.S.); +56-57-2526910 (J.P.)
| | - Javier Palacios
- Laboratorio de Bioquímica Aplicada, Facultad de Ciencias de la Salud, Universidad Arturo Prat, Iquique 1110939, Chile
- Correspondence: or (M.J.S.); (J.P.); Tel.: +56-63-63233257 (M.J.S.); +56-57-2526910 (J.P.)
| | - Adrián Paredes
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta 1240000, Chile; (A.P.); (J.B.)
| | - Jorge Bórquez
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta 1240000, Chile; (A.P.); (J.B.)
| | - Alejandra Bravo
- Laboratorio de Fisiología Experimental (EPhyL), Instituto Antofagasta (IA), Universidad de Antofagasta, Antofagasta 1240000, Chile; (A.B.); (F.C.)
| | - Fredi Cifuentes
- Laboratorio de Fisiología Experimental (EPhyL), Instituto Antofagasta (IA), Universidad de Antofagasta, Antofagasta 1240000, Chile; (A.B.); (F.C.)
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Habitat Affects the Chemical Profile, Allelopathy, and Antioxidant Properties of Essential Oils and Phenolic Enriched Extracts of the Invasive Plant Heliotropium Curassavicum. PLANTS 2019; 8:plants8110482. [PMID: 31703432 PMCID: PMC6918439 DOI: 10.3390/plants8110482] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/04/2019] [Accepted: 11/06/2019] [Indexed: 12/12/2022]
Abstract
The variation in habitat has a direct effect on the plants and as a consequence, changes their content of the bioactive constituents and biological activities. The present study aimed to explore the variation in the essential oils (EOs) and phenolics of Heliotropium curassavicum collected from the coastal and inland habitats. Additionally, we determined their antioxidant and allelopathic activity against the weed, Chenopodium murale. Fifty-six compounds were identified as overall from EOs, from which 25 components were identified from the coastal sample, and 52 from the inland one. Sesquiterpenes were the main class in both samples (81.67% and 79.28%), while mono (3.99% and 7.21%) and diterpenes (2.9% and 1.77%) represented minors, respectively. Hexahydrofarnesyl acetone, (-)-caryophyllene oxide, farnesyl acetone, humulene oxide, farnesyl acetone C, and nerolidol epoxy acetate were identified as major compounds. The HPLC analysis of MeOH extracts of the two samples showed that chlorogenic acid, rutin, and propyl gallate are major compounds in the coastal sample, while vanilin, quercetin, and 4′,7-dihydroxyisoflavone are majors in the inland one. The EOs showed considerable phytotoxicity against C. murale with IC50 value of 2.66, 0.59, and 0.70 mg mL−1 for germination, root, and shoot growth, respectively from the inland sample. While the coastal sample attained the IC50 values of 1.58, 0.45, and 0.66 mg mL−1. MeOH extracts revealed stronger antioxidant activity compared to the EOs. Based on IC50 values, the ascorbic acid revealed 3-fold of the antioxidant compared to the EO of the coastal sample and 4-fold regarding the inland sample. However, the ascorbic acid showed 3-fold of the antioxidant activity of the MeOH extracts of coastal and inland samples. Although H. curassavicum is considered as a noxious, invasive plant, the present study revealed that EO and MeOH extracts of the H. curassavicum could be considered as promising, eco-friendly, natural resources for antioxidants as well as weed control, particularly against the weed, C. murale.
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Valenzuela B, Rodríguez FE, Modak B, Imarai M. Alpinone exhibited immunomodulatory and antiviral activities in Atlantic salmon. FISH & SHELLFISH IMMUNOLOGY 2018; 74:76-83. [PMID: 29292197 DOI: 10.1016/j.fsi.2017.12.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 12/16/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
In this study, we seek to identify flavonoids able to regulate the gene expression of a group of cytokines important for the control of infections in Atlantic salmon (Salmo salar). Particularly, we studied the potential immunomodulatory effects of two flavonoids, Alpinone and Pinocembrine, which were isolated and purified from resinous exudates of Heliotropium huascoense and Heliotropium sinuatum, respectively. The transcript levels of TNF-α and IL-1 (inflammatory cytokines), IFN-γ and IL-12 (T helper 1 type cytokines), IL4/13A (Th2-type cytokine), IL-17 (Th17 type cytokine) TGF-β1 (regulatory cytokine) and IFN-α (antiviral cytokine) were quantified by qRT-PCR in kidneys of flavonoid-treated and control fish. We demonstrated that the administration of a single intramuscular dose of purified Alpinone increased the transcriptional expression of five cytokines, named TNF-α, IL-1, IFN-α, IFN-γ and TGF-β1 in treated fish compared to untreated fish. Conversely, administration of purified Pinocembrine reduced the transcriptional expression of TNF-α, IL-1 and IL-12 in the kidney of treated fish. No other changes were observed. Interestingly, Alpinone also induced in vitro antiviral effects against Infectious Salmon Anaemia virus. Results showed that Alpinone but not Pinocembrine induces the expression of cytokines, which in vertebrates are essential to control viral infections while Pinocembrine reduces pro-inflammatory cytokines. Altogether results suggest that Alpinone is a good candidate to be further tested as immunostimulant and antiviral drug.
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Affiliation(s)
- Beatriz Valenzuela
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Felipe E Rodríguez
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Brenda Modak
- Laboratory of Chemistry of Natural Products, Center of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Mónica Imarai
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
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Licá ICL, Soares AMDS, de Mesquita LSS, Malik S. Biological properties and pharmacological potential of plant exudates. Food Res Int 2018; 105:1039-1053. [DOI: 10.1016/j.foodres.2017.11.051] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/16/2017] [Accepted: 11/19/2017] [Indexed: 01/27/2023]
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Brito I, Bórquez J, Simirgiotis M, Cárdenas A. Crystal structure of 5-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3,7,8-trimethoxy-4 H-chromen-4-one, C 19H 18O 8. Z KRIST-NEW CRYST ST 2018. [DOI: 10.1515/ncrs-2017-0141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C19H18O8, monoclinic, P21/c (no. 14), a = 12.689(2) Å, b = 20.321(4) Å, c = 7.0820(13) Å, β = 105.368(13)°, V = 1760.8(6) Å3, Z = 4, R
gt = 0.0662, wR
ref(F
2) = 0.1788, T = 295 K.
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Affiliation(s)
- Iván Brito
- Departamento de Química, Facultad de Ciencias Básicas , Universidad de Antofagasta , Casilla 170, Antofagasta , Chile
| | - Jorge Bórquez
- Departamento de Química, Facultad de Ciencias Básicas , Universidad de Antofagasta , Casilla 170, Antofagasta , Chile
| | - Mario Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias , Universidad Austral de Chile , casilla 567, Valdivia 5090000 , Chile
| | - Alejandro Cárdenas
- Departamento de Física, Facultad de Ciencias Básicas , Universidad de Antofagasta , Casilla 170, Antofagasta , Chile
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Escobar B, Montenegro I, Villena J, Werner E, Godoy P, Olguín Y, Madrid A. Hemi-Synthesis and Anti-Oomycete Activity of Analogues of Isocordoin. Molecules 2017; 22:molecules22060968. [PMID: 28604594 PMCID: PMC6152731 DOI: 10.3390/molecules22060968] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 06/07/2017] [Accepted: 06/08/2017] [Indexed: 11/29/2022] Open
Abstract
An efficient synthesis of a series of 4′-oxyalkyl-isocordoin analogues (2–8) is reported for the first time. Their structures were confirmed by 1H-NMR, 13C-NMR, and HRMS. Their anti-oomycete activity was evaluated by mycelium and spores inhibition assay against two selected pathogenic oomycetes strains: Saprolegnia parasitica and Saprolegnia australis. The entire series of isocordoin derivatives (except compound 7) showed high inhibitory activity against these oomycete strains. Among them, compound 2 exhibited strong activity, with minimum inhibitory concentration (MIC) and minimum oomyceticidal concentration (MOC) values of 50 µg/mL and 75 µg/mL, respectively. The results showed that 4′-oxyalkylated analogues of isocordoin could be potential anti-oomycete agents.
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Affiliation(s)
- Beatriz Escobar
- Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Avda. Leopoldo Carvallo 270, Playa Ancha, Valparaíso 2340000, Chile.
| | - Iván Montenegro
- Escuela de Obstetricia y Puericultura, Facultad de medicina, Campus de la Salud, Universidad de Valparaíso, Angamos 655, Reñaca, Viña del Mar 2520000, Chile.
- Centro de Investigaciones Biomédicas (CIB), Escuela de Medicina, Universidad de Valparaíso, Av. Hontaneda Nº 2664, Valparaíso 2340000, Chile.
| | - Joan Villena
- Centro de Investigaciones Biomédicas (CIB), Escuela de Medicina, Universidad de Valparaíso, Av. Hontaneda Nº 2664, Valparaíso 2340000, Chile.
| | - Enrique Werner
- Departamento De Ciencias Básicas, Campus Fernando May Universidad del Biobío. Avda. Andrés Bello s/n casilla 447, Chillán 3780000, Chile.
| | - Patricio Godoy
- Instituto de Microbiología Clínica, Facultad de Medicina, Universidad Austral de Chile, Los Laureles s/n, Isla Teja, Valdivia 5090000, Chile.
| | - Yusser Olguín
- Center for Integrative Medicine and Innovative Science (CIMIS), Facultad de Medicina, Universidad Andrés Bello, Santiago 8320000, Chile.
| | - Alejandro Madrid
- Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Avda. Leopoldo Carvallo 270, Playa Ancha, Valparaíso 2340000, Chile.
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7
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Brito I, Simirgiotis ML, Pasten L, Muñoz R, Bórquez J, Cárdenas A. Crystal structure of 5,7,4′-trihydroxy-3,8,3′-trymethoxyflavone, C 18H 16O 8. Z KRIST-NEW CRYST ST 2017. [DOI: 10.1515/ncrs-2016-0224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C18H16O8, monoclinic, P21/n, (no. 14), a = 7.9253(3) Å, b = 16.8928(6) Å, c = 11.8439(5) Å, β = 92.387(2)°, V = 1584.29(11) Å3, Z = 4, R
gt(F) = 0.043, wR
ref(F2) = 0.102, T = 295(2) K.
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Affiliation(s)
- Iván Brito
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
| | - Mario L. Simirgiotis
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
| | - Leyla Pasten
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
| | - Rubén Muñoz
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
| | - Jorge Bórquez
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
| | - Alejandro Cárdenas
- Departamento de Física, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla 170, Antofagasta, Chile
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Singh B, Sahu PM, Sharma RA. Flavonoids from Heliotropium subulatum exudate and their evaluation for antioxidant, antineoplastic and cytotoxic activities II. Cytotechnology 2016; 69:103-115. [PMID: 27905025 DOI: 10.1007/s10616-016-0041-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 11/04/2016] [Indexed: 12/19/2022] Open
Abstract
The flavonoids are the largest group of phenolic compounds isolated from a wide range of higher plants. These compounds work as antimicrobials, anti-insect agents and protect plants from other types of biotic and abiotic stresses. Various researchers have suggested that flavonoids possessed antioxidant, antineoplastic and cytotoxic activities. The main objective of this study was to test dichloromethane fraction of resinous exudate of Heliotropium subulatum for their antioxidant, antineoplastic and cytotoxic activities, as well as to search new antioxidant and antineoplastic agents for pharmaceutical formulations. Five flavonoids were isolated from resinous exudate of this plant species and screened for their in vitro and in vivo antioxidant models (DPPH radical scavenging, reducing power, superoxide anion scavenging, metal chelating scavenging systems, catalase and lipid peroxidation), antineoplastic (Sarcoma 180), and cytotoxic (Chinese hamster V79 cells) activities. Tricetin demonstrated maximum antioxidant activity against both in vitro and in vivo experimental systems while galangin exhibited maximum inhibition (78.35%) at a dose of 10 µg/kg/day against Sarcoma 180. Similarly, it was found that galangin also showed highest activity (21.1 ± 0.15%) at a concentration of 70 µg/ml to Chinese hamster V79 cells. The observed results suggest that tricetin has a potential to scavenge free radicals in both in vitro and in vivo models while the galangin could be considered as antitumor and cytotoxic agent.
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Affiliation(s)
- Bharat Singh
- Institute of Biotechnology, Amity University Rajasthan, Jaipur, 303002, India.
| | - Pooran M Sahu
- Medicinal Plants Research Laboratory, Department of Botany, University of Rajasthan, Jaipur, 302004, India
| | - Ram A Sharma
- Medicinal Plants Research Laboratory, Department of Botany, University of Rajasthan, Jaipur, 302004, India
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Antimicrobial, Cytotoxic, Phytotoxic and Antioxidant Potential of Heliotropium strigosum Willd. MEDICINES 2016; 3:medicines3030020. [PMID: 28930129 PMCID: PMC5456253 DOI: 10.3390/medicines3030020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/19/2016] [Accepted: 07/21/2016] [Indexed: 11/17/2022]
Abstract
Background:Heliotropium strigosum Willd. (Chitiphal) is a medicinally important herb that belongs to the Boraginaceae family. Traditionally, this plant was used in the medication therapy of various ailments in different populations of the world. The aim of the study is to probe the therapeutic aspects of H. strigosum described in the traditional folklore history of medicines. Methods: In the present study, the dichloromethane crude extract of this plant was screened to explore the antimicrobial, cytotoxic, phytotoxic and antioxidant potential of H. strigosum. For antibacterial, antifungal and antioxidant activities, microplate alamar blue assay (MABA), agar tube dilution method and diphenyl picryl hydrazine (DPPH) radical-scavenging assay were used, respectively. The cytotoxic and phytotoxic potential were demonstrated by using brine shrimp lethality bioassay and Lemna minor assay. Results: The crude extract displayed positive cytotoxic activity in the brine shrimp lethality assay, with 23 of 30 shrimps dying at the concentration of 1000 µg/mL. It also showed moderate phytotoxic potential with percent inhibition of 50% at the concentration of 1000 µg/mL. The crude extract exhibited no significant antibacterial activity against Staphylococcus aureus, Shigella flexneri, Escherichia coli and Pseudomonas aeruginosa. Non-significant antifungal and radical scavenging activity was also shown by the dichloromethane crude extract. Conclusion: It is recommended that scientists focus on the identification and isolation of beneficial bioactive constituents with the help of advanced scientific methodologies that seems to be helpful in the synthesis of new therapeutic agents of desired interest.
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Abstract
Abstract
C17H14O7, monoclinic, P21/c (no. 14), a = 11.6670(4) Å, b = 11.3338(4) Å, c = 11.6415(4) Å, β = 110.269(1) Å, V = 1444.05(9) Å3, Z = 4, R
gt
(F) = 0.038, wR
ref
(F
2
) = 0.117, T = 296 K.
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Recent Progress in Small-Molecule Agents Against Age-Related Macular Degeneration. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2013. [DOI: 10.1016/b978-0-12-417150-3.00022-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Larghi EL, Operto MA, Torres R, Kaufman TS. Synthesis and classical pathway Complement inhibitory activity of C7-functionalized filifolinol derivatives, inspired in K-76 COOH. Eur J Med Chem 2012; 55:74-84. [DOI: 10.1016/j.ejmech.2012.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 06/29/2012] [Accepted: 07/02/2012] [Indexed: 11/27/2022]
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Brito I, Bórquez J, Simirgiotis M, Cárdenas A, López-Rodríguez M. 4',5-Dihy-droxy-7-meth-oxy-flavanone dihydrate. Acta Crystallogr Sect E Struct Rep Online 2011; 68:o32-3. [PMID: 22259537 PMCID: PMC3254395 DOI: 10.1107/s1600536811051221] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 11/28/2011] [Indexed: 11/27/2022]
Abstract
The title compound, C16H14O5·2H2O [systematic name: 5-hydroxy-2-(4-hydroxyphenyl)-7-methoxychroman-4-one dihydrate], is a natural phytoalexin flavone isolated from the native chilean species Heliotropium taltalense and crystallizes with an organic molecule and two water molecules in the asymmetric unit. The 5-hydroxy group forms a strong intramolecular hydrogen bond with the carbonyl group, resulting in a six-membered ring. In the crystal, the components are linked by O—H⋯O hydrogen bonds, forming a three-dimensional network. The 4-hydroxyphenyl benzene ring is bonded equatorially to the pyrone ring, which adopts a slightly distorted sofa conformation. The title compound is the hydrated form of a previously reported structure [Shoja (1990 ▶). Acta Cryst. C46, 1969–1971]. There are only slight variations in the molecular geometry between the two compounds.
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Chat OA, Najar MH, Mir MA, Rather GM, Dar AA. Effects of surfactant micelles on solubilization and DPPH radical scavenging activity of Rutin. J Colloid Interface Sci 2010; 355:140-9. [PMID: 21194710 DOI: 10.1016/j.jcis.2010.11.044] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 11/15/2010] [Accepted: 11/16/2010] [Indexed: 02/04/2023]
Abstract
The interaction of the antioxidant Rutin with the radical DPPH (2,2-diphenyl-1-picrylhydrazyl) in presence of cationic (CTAB, TTAB, DTAB), non-ionic (Brij78, Brij58, Brij35), anionic (SDS) and mixed surfactant systems (CTAB-Brij58, DTAB-Brij35, SDS-Brij35) has been followed by spectrophotometric and tensiometric methods to evaluate the DPPH radical scavenging activity (RSA) of Rutin in these model self-assembled structures. The results show that the solubilization capacity of various single surfactant systems for both DPPH as well as Rutin followed the order cationics > non-ionics > anionic. The radical scavenging activity of Rutin in the solubilized form was higher within ionic micelles than in non-ionic micelles. However, the antioxidant exhibited enhanced activity for the radical in mixed cationic-non-ionic micelles compared with any of the single component micelles. In contrast, anionic-non-ionic mixed micelles modulated the activity of Rutin in-between that seen for pure anionic and non-ionic micelles only.
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Affiliation(s)
- Oyais Ahmad Chat
- Department of Chemistry, University of Kashmir, Srinagar-190006, J&K, India
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Naseem B, Shah SWH, Hasan A, Sakhawat Shah S. Interaction of flavonoids, the naturally occurring antioxidants with different media: a UV-visible spectroscopic study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:1341-1346. [PMID: 20163982 DOI: 10.1016/j.saa.2009.12.083] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2009] [Revised: 12/24/2009] [Accepted: 12/31/2009] [Indexed: 05/28/2023]
Abstract
Quantitative parameters for interaction of flavonoids-the naturally occurring antioxidants, with solvents and surfactants are determined using UV-visible absorption spectroscopy. The availability of flavonoids; kaempferol, apigenin, kaempferide and rhamnetin in micelles of sodium dodecyl sulfate (SDS) is reflected in terms of partition coefficient, K(c). Thermodynamic calculations show that the process of transfer of flavonoid molecules to anionic micelles of SDS is energy efficient. A distortion in flavonoid's morphology occurs in case of kaempferol and apigenin in surfactant and water, exhibited in terms of a new band in the UV region of electronic spectra of these flavonoids. The partition coefficients of structurally related flavonoids are correlated with their antioxidant activities.
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Affiliation(s)
- Bushra Naseem
- Department of Chemistry, Lahore College for Women University, Lahore, Pakistan
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Study of the chemical composition of the resinous exudate isolated from Heliotropium sclerocarpum and evaluation of the antioxidant properties of the phenolic compounds and the resin. Molecules 2009; 14:4625-33. [PMID: 19924090 PMCID: PMC6254790 DOI: 10.3390/molecules14114625] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Revised: 10/31/2009] [Accepted: 11/11/2009] [Indexed: 11/17/2022] Open
Abstract
Heliotropium sclerocarpum Phil. (Heliotropiaceae) is a resinous bush that grows in the Atacama of northern Chile. The chemical composition of its resinous exudate was analyzed for the first time. One aromatic geranyl derivative: filifolinol (1), one flavanone: naringenin (2) and a new type of 3-oxo-2-arylbenzofuran derivative 3 were isolated and their structures were determined. The antioxidant activity of the phenolic compounds and resin was evaluated using the bleaching of DPPH radical method and expressed as fast reacting equivalents (FRE) and total reacting equivalents (TRE).
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Larghi EL, Operto MA, Torres R, Kaufman TS. New inhibitors of the complement system inspired in K76-COOH. A SAR study of filifolinol derivatives through modifications of the C3′ position. Bioorg Med Chem Lett 2009; 19:6172-5. [DOI: 10.1016/j.bmcl.2009.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 08/31/2009] [Accepted: 09/02/2009] [Indexed: 12/21/2022]
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