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Paut A, Guć L, Vrankić M, Crnčević D, Šenjug P, Pajić D, Odžak R, Šprung M, Nakić K, Marciuš M, Prkić A, Mitar I. Plant-Mediated Synthesis of Magnetite Nanoparticles with Matricaria chamomilla Aqueous Extract. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:729. [PMID: 38668223 PMCID: PMC11053587 DOI: 10.3390/nano14080729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 04/29/2024]
Abstract
Magnetite nanoparticles (NPs) possess properties that make them suitable for a wide range of applications. In recent years, interest in the synthesis of magnetite NPs and their surface functionalization has increased significantly, especially regarding their application in biomedicine such as for controlled and targeted drug delivery. There are several conventional methods for preparing magnetite NPs, all of which mostly utilize Fe(iii) and Fe(ii) salt precursors. In this study, we present a microwave hydrothermal synthesis for the precipitation of magnetite NPs at temperatures of 200 °C for 20 min and 260 °C for 5 min, with only iron(iii) as a precursor utilizing chamomile flower extract as a stabilizing, capping, and reducing agent. Products were characterized using FTIR, PXRD, SEM, and magnetometry. Our analysis revealed significant differences in the properties of magnetite NPs prepared with this approach, and the conventional two-precursor hydrothermal microwave method (sample MagH). FTIR and PXRD analyses confirmed coated magnetite particles. The temperature and magnetic-field dependence of magnetization indicate their superparamagnetic behavior. Importantly, the results of our study show the noticeable cytotoxicity of coated magnetite NPs-toxic to carcinoma cells but harmless to healthy cells-further emphasizing the potential of these NPs for biomedical applications.
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Affiliation(s)
- Andrea Paut
- Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia; (A.P.); (A.P.)
| | - Lucija Guć
- Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia; (L.G.); (D.C.); (R.O.); (M.Š.); (K.N.)
| | - Martina Vrankić
- Laboratory for Synthesis and Crystallography of Functional Materials, Division of Materials Physics, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia;
| | - Doris Crnčević
- Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia; (L.G.); (D.C.); (R.O.); (M.Š.); (K.N.)
| | - Pavla Šenjug
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička Cesta 32, 10000 Zagreb, Croatia; (P.Š.); (D.P.)
| | - Damir Pajić
- Department of Physics, Faculty of Science, University of Zagreb, Bijenička Cesta 32, 10000 Zagreb, Croatia; (P.Š.); (D.P.)
| | - Renata Odžak
- Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia; (L.G.); (D.C.); (R.O.); (M.Š.); (K.N.)
| | - Matilda Šprung
- Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia; (L.G.); (D.C.); (R.O.); (M.Š.); (K.N.)
| | - Kristian Nakić
- Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia; (L.G.); (D.C.); (R.O.); (M.Š.); (K.N.)
| | - Marijan Marciuš
- Laboratory for Synthesis of New Materials, Division of Materials Chemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia;
| | - Ante Prkić
- Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia; (A.P.); (A.P.)
| | - Ivana Mitar
- Faculty of Science, University of Split, Ruđera Boškovića 33, 21000 Split, Croatia; (L.G.); (D.C.); (R.O.); (M.Š.); (K.N.)
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Grint I, Crea F, Vasiliadou R. The Combination of Electrochemistry and Microfluidic Technology in Drug Metabolism Studies. Chemistry 2022; 11:e202200100. [PMID: 36166688 PMCID: PMC9716038 DOI: 10.1002/open.202200100] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/25/2022] [Indexed: 01/31/2023]
Abstract
Drugs are metabolized within the liver (pH 7.4) by phase I and phase II metabolism. During the process, reactive metabolites can be formed that react covalently with biomolecules and induce toxicity. Identifying and detecting reactive metabolites is an important part of drug development. Preclinical and clinical investigations are conducted to assess the toxicity and safety of a new drug candidate. Electrochemistry coupled to mass spectrometry is an ideal complementary technique to the current preclinical studies, a pure instrumental approach without any purification steps and tedious protocols. The combination of microfluidics with electrochemistry towards the mimicry of drug metabolism offers portability, low volume of reagents and faster reaction times. This review explores the development of microfluidic electrochemical cells for mimicking drug metabolism.
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Affiliation(s)
- Isobel Grint
- School of Life, Health and Chemical SciencesThe Open UniversityWalton Hall, Karen HillsMilton KeynesMK7 6AAUK
| | - Francesco Crea
- School of Life, Health and Chemical SciencesThe Open UniversityWalton Hall, Karen HillsMilton KeynesMK7 6AAUK
| | - Rafaela Vasiliadou
- School of Life, Health and Chemical SciencesThe Open UniversityWalton Hall, Karen HillsMilton KeynesMK7 6AAUK
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Speisky H, Shahidi F, Costa de Camargo A, Fuentes J. Revisiting the Oxidation of Flavonoids: Loss, Conservation or Enhancement of Their Antioxidant Properties. Antioxidants (Basel) 2022; 11:antiox11010133. [PMID: 35052636 PMCID: PMC8772813 DOI: 10.3390/antiox11010133] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/27/2021] [Accepted: 12/29/2021] [Indexed: 02/06/2023] Open
Abstract
Flavonoids display a broad range of health-promoting bioactivities. Among these, their capacity to act as antioxidants has remained most prominent. The canonical reactive oxygen species (ROS)-scavenging mode of the antioxidant action of flavonoids relies on the high susceptibility of their phenolic moieties to undergo oxidation. As a consequence, upon reaction with ROS, the antioxidant capacity of flavonoids is severely compromised. Other phenol-compromising reactions, such as those involved in the biotransformation of flavonoids, can also markedly affect their antioxidant properties. In recent years, however, increasing evidence has indicated that, at least for some flavonoids, the oxidation of such residues can in fact markedly enhance their original antioxidant properties. In such apparent paradoxical cases, the antioxidant activity arises from the pro-oxidant and/or electrophilic character of some of their oxidation-derived metabolites and is exerted by activating the Nrf2–Keap1 pathway, which upregulates the cell’s endogenous antioxidant capacity, and/or, by preventing the activation of the pro-oxidant and pro-inflammatory NF-κB pathway. This review focuses on the effects that the oxidative and/or non-oxidative modification of the phenolic groups of flavonoids may have on the ability of the resulting metabolites to promote direct and/or indirect antioxidant actions. Considering the case of a metabolite resulting from the oxidation of quercetin, we offer a comprehensive description of the evidence that increasingly supports the concept that, in the case of certain flavonoids, the oxidation of phenolics emerges as a mechanism that markedly amplifies their original antioxidant properties. An overlooked topic of great phytomedicine potential is thus unraveled.
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Affiliation(s)
- Hernan Speisky
- Laboratory of Antioxidants, Nutrition and Food Technology Institute, University of Chile, Santiago 7810000, Chile;
- Correspondence: (H.S.); (J.F.); Tel.: +56-(2)-2978-1519 (H.S.)
| | - Fereidoon Shahidi
- Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada;
| | - Adriano Costa de Camargo
- Laboratory of Antioxidants, Nutrition and Food Technology Institute, University of Chile, Santiago 7810000, Chile;
| | - Jocelyn Fuentes
- Laboratory of Antioxidants, Nutrition and Food Technology Institute, University of Chile, Santiago 7810000, Chile;
- Faculty of Medicine, School of Kinesiology, Universidad Finis Terrae, Santiago 7501015, Chile
- Correspondence: (H.S.); (J.F.); Tel.: +56-(2)-2978-1519 (H.S.)
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Cong Y, Guo J, Tang Z, Lin S, Zhang Q, Li J, Cai Z. Metabolism Study of Veratramine Associated with Neurotoxicity by Using HPLC-MSn. J Chromatogr Sci 2014; 53:1092-9. [PMID: 25547283 DOI: 10.1093/chromsci/bmu171] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Indexed: 11/13/2022]
Abstract
Veratramine (VAM) is the major lipid-soluble alkaloid existing in Veratrum nigrum L. that has been demonstrated to exert neurotoxic effects. To better understand the potential mechanism of neurotoxicity of VAM, VAM-induced DNA damage was measured in the cerebellum and cerebral cortex of mice after a 7-day repetitive oral dose by using single-cell gel electrophoresis (comet assay). A method based on high-performance liquid chromatography-electrospray ionization tandem mass spectrometry was developed for the determination of VAM and its in vivo and in vitro metabolites, to establish the potential correlation between metabolites and neurotoxicity. In vitro experiment was carried out using rat liver microsomes, whereas the in vivo study was conducted on rats at a single dose of 3 mg/kg. The results showed that VAM caused DNA damage in the cerebellum and cerebral cortex of mice in a dose-dependent manner. Phenyl mono-oxidation, sulfate conjugation and phenyl di-oxidation were proposed to be the main in vivo metabolic pathways of VAM, whereas the major in vitro metabolic pathways were phenyl mono-oxidation, hydroxylation and methylation. Phenyl-oxidation reaction was likely to be associated with reactive oxygen species production, leading to the DNA damage in the mouse brain.
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Affiliation(s)
- Yue Cong
- Institute of Pharmacy, Pharmaceutical College, Henan University, Kaifeng, China Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Jinggong Guo
- The Key Laboratory of Plant Stress Biology, Henan University, Kaifeng, China
| | - Zhi Tang
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Shuhai Lin
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Qingchun Zhang
- Institute of Pharmacy, Pharmaceutical College, Henan University, Kaifeng, China
| | - Jing Li
- Institute of Pharmacy, Pharmaceutical College, Henan University, Kaifeng, China
| | - Zongwei Cai
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong
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Identification of in vitro and in vivo metabolites of 12β-hydroxylveratroylzygadenine associated with neurotoxicity by using HPLC–MS/MS. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.05.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mattarei A, Biasutto L, Rastrelli F, Garbisa S, Marotta E, Zoratti M, Paradisi C. Regioselective O-derivatization of quercetin via ester intermediates. An improved synthesis of rhamnetin and development of a new mitochondriotropic derivative. Molecules 2010; 15:4722-36. [PMID: 20657388 PMCID: PMC6257647 DOI: 10.3390/molecules15074722] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 06/22/2010] [Accepted: 07/02/2010] [Indexed: 02/06/2023] Open
Abstract
The regioselective synthesis of several quercetin (3,3’,4’,5,7-pentahydroxy flavone) tetraesters bearing a single free OH on 5-C was achieved in good yield by proper choice of reaction conditions using common esterification procedures. Tetracetylated quercetin with the free OH on 7-C was selectively obtained instead via imidazole-promoted deacylation of the corresponding pentaester. Unambiguous structural characterization of the two isomeric tetraacetyl quercetin derivatives was obtained by combined HSQC and HMBC 2D-NMR analysis. These molecules can be used as starting materials for the regioselective synthesis of other derivatives. High yield syntheses of the natural polyphenol rhamnetin (7-O-methylquercetin) and of the new mitochondriotropic compound 7-(4-triphenylphosphoniumbutyl) quercetin iodide are reported as examples.
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Affiliation(s)
- Andrea Mattarei
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Lucia Biasutto
- Department of Biomedical Sciences, Università di Padova, viale G. Colombo 3, 35121 Padova, Italy
| | - Federico Rastrelli
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Spiridione Garbisa
- Department of Biomedical Sciences, Università di Padova, viale G. Colombo 3, 35121 Padova, Italy
| | - Ester Marotta
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131 Padova, Italy
| | - Mario Zoratti
- Department of Biomedical Sciences, Università di Padova, viale G. Colombo 3, 35121 Padova, Italy
- CNR Institute of Neuroscience, viale G. Colombo 3, 35121 Padova, Italy
| | - Cristina Paradisi
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, 35131 Padova, Italy
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-049-827-5661; Fax: +39-049-827-5239
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Mattarei A, Biasutto L, Marotta E, De Marchi U, Sassi N, Garbisa S, Zoratti M, Paradisi C. A Mitochondriotropic Derivative of Quercetin: A Strategy to Increase the Effectiveness of Polyphenols. Chembiochem 2008; 9:2633-42. [DOI: 10.1002/cbic.200800162] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Sadeghipour M, Terreux R, Phipps J. Flavonoids and tyrosine nitration: structure–activity relationship correlation with enthalpy of formation. Toxicol In Vitro 2005; 19:155-65. [PMID: 15649628 DOI: 10.1016/j.tiv.2004.06.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2004] [Accepted: 06/25/2004] [Indexed: 10/26/2022]
Abstract
The ability of 11 flavonoids, naturally occurring polyphenols, and their related structure-activity relationships (SAR's) for inhibiting peroxynitrite-induced nitration of tyrosine was investigated. The flavonoids under study could be classified into four groups having very distinct in vitro inhibition effects. We also calculated the heat of formation (DeltaH(f)) of the corresponding flavonoids radicals which supported this finding. The most effective flavonoids included: catechin, taxifolin, luteolin, quercetin, and myricetin which have a common structural feature of ortho-dihydroxyl moiety (3',4'-OH substitution). Naringenin, kaempferol, and morin were 50% less effective inhibitors than the former group of flavonoid while their activities were in the range of trolox (an alpha-tocopherol analogue). The common structural aspect of this group of flavonoids is 4'-OH substitution. Therefore, these two groups of flavonoids may have similar mechanisms for their inhibition activity. No inhibition activity was observed by galangin. Apigenin behaved as a pro-oxidant in our in vitro study. Naringin was as effective as the second group at 4 mM tyrosine concentration while did not illustrate any inhibitory effect at 1 mM concentration of tyrosine. Our study provides further evidence for the importance of the catechol B ring and to a lesser effect the importance of 4'-OH substitution. Moreover, we observed very little or no influence on activity of flavonoids by 3-OH substitution and/or a C2-C3 double bond conjugated with 4-keto group within the subgroup containing the catechol moiety. Theoretical calculation of DeltaDeltaH(f) for tyrosyl radical repair by flavonoids (TyO*+FlOH-->TyOH+FlO*) correlated well with our in vitro results (inhibition% = -10 (DeltaDeltaH(f)), R2=0.906). Furthermore, this correlation was independent of tyrosine concentration. This model can be used to accurately predict the inhibitory effect of flavonoids on nitrotyrosine formation.
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Affiliation(s)
- Mitra Sadeghipour
- National Research Council Canada, PharmaGap Inc., Room 2033, 100 Sussex Dr., Ottawa, ON, Canada K1A OR6.
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Spencer JPE, Kuhnle GGC, Williams RJ, Rice-Evans C. Intracellular metabolism and bioactivity of quercetin and its in vivo metabolites. Biochem J 2003; 372:173-81. [PMID: 12578560 PMCID: PMC1223367 DOI: 10.1042/bj20021972] [Citation(s) in RCA: 186] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2002] [Revised: 01/28/2003] [Accepted: 02/11/2003] [Indexed: 01/19/2023]
Abstract
Understanding the cellular effects of flavonoid metabolites is important for predicting which dietary flavonoids might be most beneficial in vivo. Here we investigate the bioactivity in dermal fibroblasts of the major reported in vivo metabolites of quercetin, i.e. 3'-O-methyl quercetin, 4'-O-methyl quercetin and quercetin 7-O-beta-D-glucuronide, relative to that of quercetin, in terms of their further metabolism and their resulting cytotoxic and/or cytoprotective effects in the absence and presence of oxidative stress. Uptake experiments indicate that exposure to quercetin led to the generation of two novel cellular metabolites, one characterized as a 2'-glutathionyl quercetin conjugate and another product with similar spectral characteristics but 1 mass unit lower, putatively a quinone/quinone methide. A similar product was identified in cells exposed to 3'-O-methyl quercetin, but not in the lysates of those exposed to its 4'-O-methyl counterpart, suggesting that its formation is related to oxidative metabolism. There was no uptake or metabolism of quercetin 7-O-beta-D-glucuronide by fibroblasts. Formation of oxidative metabolites may explain the observed concentration-dependent toxicity of quercetin and 3'-O-methyl quercetin, whereas the formation of a 2'-glutathionyl quercetin conjugate is interpreted as a detoxification step. Both O -methylated metabolites conferred less protection than quercetin against peroxide-induced damage, and quercetin glucuronide was ineffective. The ability to modulate cellular toxicity paralleled the ability of the compounds to decrease the level of peroxide-induced caspase-3 activation. Our data suggest that the actions of quercetin and its metabolites in vivo are mediated by intracellular metabolites.
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Affiliation(s)
- Jeremy P E Spencer
- Wolfson Centre for Age-Related Diseases, GKT School of Biomedical Sciences, Hodgkin Building, King's College, Guy's Campus, London SE1 9RT, U.K
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