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Woźnicka E, Zapała L, Miłoś A, Ciszkowicz E, Lecka-Szlachta K, Woźnicki P, Przygórzewska A, Kosińska-Pezda M, Byczyński Ł. Synthesis, spectroscopic characterization and biological activities of complexes of light lanthanide ions with 3-hydroxyflavone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124870. [PMID: 39067436 DOI: 10.1016/j.saa.2024.124870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/12/2024] [Accepted: 07/21/2024] [Indexed: 07/30/2024]
Abstract
New solid compounds of light lanthanide ions with 3-hydroxyflavone were synthesized in good yields (up to 85 %). The resulting complexes have been thoroughly characterized using various analytical and spectral techniques, including elemental analysis, complexometry, thermogravimetry, UV-VIS, FT-IR, 1H NMR, 109AgNPET LDI MS and fluorescence spectroscopy. The molecular formulas of the complexes were determined as follows: Ln(3HF)3, where 3HF-3-hydroxyflavone, Ln = La(III), Pr(III), Nd(III) and Ln(3HF)3·nH2O, where n = 1 for Ln = Ce(III), Sm(III), Eu(III), and n = 2 for Gd(III). Thermogravimetric studies revealed that the water molecules in the hydrated compounds are located in the outer coordination sphere. Based on the spectral data, it was noted that lanthanide ions interacted with the 3OH and 4CO groups of 3-hydroxyflavone. The effect of lanthanide ion chelation on the excited-state intramolecular proton transfer (ESIPT) process and fluorescence emission of 3HF was investigated. It was found that coordination with metal ions can suppress the ESIPT process and enhance the fluorescence emission of 3HF. The synthesized compounds were also screened for their antibacterial activity, free radical scavenging capacity, and interaction with BSA. The results showed that the complexes exhibit higher biological activity compared to the ligand.
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Affiliation(s)
- Elżbieta Woźnicka
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, Rzeszow University of Technology, Powstańców Warszawy Av., 6, 35-959 Rzeszów, Poland.
| | - Lidia Zapała
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, Rzeszow University of Technology, Powstańców Warszawy Av., 6, 35-959 Rzeszów, Poland
| | - Anna Miłoś
- Doctoral School of Engineering and Technical Sciences at the Rzeszow University of Technology, Department of Biotechnology and Bioinformatics, Faculty of Chemistry, Powstańców Warszawy 6, 35-959 Rzeszów, Poland
| | - Ewa Ciszkowicz
- Department of Biochemistry and Biotechnology, Faculty of Chemistry, Rzeszow University of Technology, Powstańców Warszawy Av., 6, 35-959 Rzeszów, Poland
| | - Katarzyna Lecka-Szlachta
- Department of Biochemistry and Biotechnology, Faculty of Chemistry, Rzeszow University of Technology, Powstańców Warszawy Av., 6, 35-959 Rzeszów, Poland
| | - Paweł Woźnicki
- Students English Division Science Club, Medical College of the University of Rzeszów, 35-959 Rzeszów, Poland
| | - Agnieszka Przygórzewska
- Students English Division Science Club, Medical College of the University of Rzeszów, 35-959 Rzeszów, Poland
| | - Małgorzata Kosińska-Pezda
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, Rzeszow University of Technology, Powstańców Warszawy Av., 6, 35-959 Rzeszów, Poland
| | - Łukasz Byczyński
- Department of Polymer Technology, Faculty of Chemistry, Rzeszow University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, Poland
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Antioxidant vs. Prooxidant Properties of the Flavonoid, Kaempferol, in the Presence of Cu(II) Ions: A ROS-Scavenging Activity, Fenton Reaction and DNA Damage Study. Int J Mol Sci 2021; 22:ijms22041619. [PMID: 33562744 PMCID: PMC7915082 DOI: 10.3390/ijms22041619] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/29/2021] [Accepted: 02/03/2021] [Indexed: 01/04/2023] Open
Abstract
Kaempferol is a flavonoid that occurs in tea and in many vegetables and fruits, including broccoli, cabbage, beans, grapes, apples, and strawberries. The efficacy of Kaempferol has been demonstrated in the treatment of breast, esophageal, cervical, ovarian, and liver cancers and leukemia, which very likely arises from its prooxidant properties and the activation of pro-apoptotic pathways. Indeed, this matter has already been the focus of a number of published studies and reviews. The aim of the present study was to elucidate the antioxidant vs. prooxidant properties of flavonoids in the presence of the redox-active metal, copper (II) ion, by means of the Fenton reaction. The specific motivation of this work is that, since an increased level of Cu(II) ions is known to be associated with many disease states such as neurological conditions (Alzheimer’s disease) and cancer, any interaction between these ions and flavonoids might affect the outcome of therapeutic uses of the latter. The structure of the Cu-kaempferol complex in DMSO was investigated by means of low temperature EPR spectroscopy, which confirmed the existence of at least two distinct coordination environments around the copper (II) ion. UV vis-spectra of kaempferol and its Cu(II) complex in DMSO revealed an interaction between the 5-OH (A ring) group and the 4-CO (C ring) group of kaempferol with Cu(II) ions. An ABTS assay confirmed that kaempferol acted as an effective radical scavenger, and that this effect was further enhanced in the form of the Cu(II)-kaempferol complex. Quantitative EPR spin trapping experiments, using DMPO as the spin trap, confirmed suppression of the formation of a mixture of hydroxyl, superoxide, and methyl radicals, in a Fenton reaction system, upon coordination of kaempferol to the redox-active Cu(II) ions, by 80% with respect to the free Cu(II) ions. A viscometric study revealed a better DNA-intercalating ability of the Cu-kaempferol complex than for free kaempferol, essential for conferring anticancer activity of these substances. The results of the viscometric measurements were compared with those from a DNA damage study of Cu-kaempferol complexes in a Fenton reaction system, using gel electrophoresis. At low concentrations of kaempferol (Cu–kaempferol ratios of 1:1 and 1:2), a very weak protective effect on DNA was noted, whereas when kaempferol was present in excess, a significant DNA-protective effect was found. This can be explained if the weakly intercalated kaempferol molecules present at the surface of DNA provide protection against attack by ROS that originate from the Fenton reaction involving intercalated Cu(II)-kaempferol complexes. Following the application of ROS scavengers, L-histidine, DMSO, and SOD, gel electrophoresis confirmed the formation of singlet oxygen, hydroxyl radicals, and superoxide radical anions, respectively. We propose that the prooxidant properties of Cu-kaempferol complexes may provide anticancer activity of these substances. When present in excess, kaempferol displays antioxidant properties under Cu-Fenton conditions. This suggests that kaempferol might prove a suitable candidate for the prevention or treatment of oxidative stress related medical conditions that involve a disturbed metabolism of redox metals such as copper, for example, Menkes disease, and neurological disorders, including Alzheimer’s disease. For the potential use of kaempferol in clinical practice, it will be necessary to optimize the dose size and critical age of the patient so that this flavonoid may be beneficial as a preventive drug against cancer and neurological disorders.
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Thaviligadu DJ, Labarrière L, Moncomble A, Cornard JP. Spectroscopic and theoretical study of the pH effect on the optical properties of the calcium-morin system. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 225:117492. [PMID: 31487563 DOI: 10.1016/j.saa.2019.117492] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 08/26/2019] [Accepted: 08/27/2019] [Indexed: 06/10/2023]
Abstract
Morin (2-(2,4-dihydroxyphenyl)-3,5,7-trihydroxychromen-4-one) is an abundant flavonoid with various pharmacological and biological activities. Considering the ubiquitous presence of calcium cations in biological systems, it seems relevant to study the interaction of this ion with morin and the influence of pH on this system. In a first step, among the four hypothetical chelation sites, the preferential fixing site, its protonation state and the Ca environment have been determined by combining electronic spectroscopies and density functional theory (DFT) and time-dependent DFT calculations. Then, using the same methodology, the fate of the formed complex with the variation of pH was studied. Calcium chelation occurs with the 3-hydroxy-4-keto site with deprotonation of the hydroxyl group. The coordination number of CaII does not seem to be a determining parameter insofar whatever the number of solvent molecules present in the coordination sphere of the metal, the calculation of the electronic transitions leads to the same results. With the increase in pH, a first deprotonation of the complex occurs at the level of a solvent molecule in the metal coordination sphere, followed by a deprotonation of the hydroxyl function in position 7.
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Affiliation(s)
- Diksha Jani Thaviligadu
- Univ. Lille, CNRS, UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman, F-59000 Lille, France
| | - Luc Labarrière
- Univ. Lille, CNRS, UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman, F-59000 Lille, France
| | - Aurélien Moncomble
- Univ. Lille, CNRS, UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman, F-59000 Lille, France
| | - Jean-Paul Cornard
- Univ. Lille, CNRS, UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman, F-59000 Lille, France.
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Jomová K, Hudecova L, Lauro P, Simunkova M, Alwasel SH, Alhazza IM, Valko M. A Switch between Antioxidant and Prooxidant Properties of the Phenolic Compounds Myricetin, Morin, 3',4'-Dihydroxyflavone, Taxifolin and 4-Hydroxy-Coumarin in the Presence of Copper(II) Ions: A Spectroscopic, Absorption Titration and DNA Damage Study. Molecules 2019; 24:E4335. [PMID: 31783535 PMCID: PMC6930463 DOI: 10.3390/molecules24234335] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 11/18/2019] [Accepted: 11/25/2019] [Indexed: 12/13/2022] Open
Abstract
The beneficial effects of polyphenols, predominantly in the context of oxidative stress-related diseases such as cancer, cardiovascular diseases and neurological conditions including Alzheimer's and Parkinson's diseases, have been documented by a number of papers and reviews. The antioxidant/prooxidant properties of phenolic compounds are related mainly to the number and positions of hydroxyl groups and to their redox metal (Cu, Fe) chelating capacity. In this work we studied structurally distinct phenolic molecules such as myricetin, morin, 3',4'-dihydroxy-flavone, taxifolin and 4-hydroxycoumarin, either alone or as interacting with Cu2+ ions. EPR and UV-Vis spectroscopy confirmed that the effective binding of cupric ions to phenolic compounds requires the presence of the 3-OH and 4-CO groups on the flavonoid C ring and unsaturated C2-C3 bond of the C-ring, which permits through-conjugation with the B-ring. An ABTS assay revealed that radical scavenging activities of phenolic compounds are related to their number of hydroxyl groups, planarity of the molecular skeleton, extent of delocalization and they decrease in the order: myricetin > morin > 3',4'-dihydroxyflavone ~ 4-hydroxy coumarin > taxifolin. Absorption titrations indicate that copper ions can modulate the DNA binding affinity of flavonoids via the formation of their Cu-chelates. Gel electrophoresis measurements indicated that the protective effect of the phenolic compounds decreases in the order: 3',4'-dihydroxyflavone > 4-OH coumarin > morin > taxifolin ~ myricetin. This can be explained by the fact that myricetin, taxifolin and morin form stable Cu(II) complexes capable of causing DNA damage via interaction with DNA and ROS formation via the Fenton reaction. Application of ROS scavengers revealed the formation of singlet oxygen, superoxide and hydroxyl radicals and their concerted synergistic effect on the DNA. The overall results suggest that the most pronounced DNA damage has been observed for flavonoids containing higher number of hydroxyl groups (including 3-OH group of the C ring), such as myricetin (six hydroxyl groups), morin and taxifolin (five hydroxyl groups) in the presence of Cu(II) ions. The proposed mechanism of action by which Cu(II) complexes of myricetin, morin and taxifolin interact with DNA predispose these substances to act as potential anticancer agents. The anticancer activity of phenolic compounds can be explained by their moderate prooxidant properties, which can boost ROS formation and kill cancer cells. Alternatively, slight prooxidant properties may activate antioxidant systems, including antioxidant enzymes and low molecular antioxidants such as glutathione and thus act as preventive anticancer agents.
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Affiliation(s)
- Klaudia Jomová
- Department of Chemistry, Constantine the Philosopher University in Nitra, 949 74 Nitra, Slovakia; (K.J.); (L.H.); (P.L.)
| | - Lenka Hudecova
- Department of Chemistry, Constantine the Philosopher University in Nitra, 949 74 Nitra, Slovakia; (K.J.); (L.H.); (P.L.)
| | - Peter Lauro
- Department of Chemistry, Constantine the Philosopher University in Nitra, 949 74 Nitra, Slovakia; (K.J.); (L.H.); (P.L.)
| | - Miriama Simunkova
- Faculty Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovakia;
| | - Saleh H. Alwasel
- King Saud University, Zoology Department, College of Science, Riyadh 11451, Saudi Arabia (I.M.A.)
| | - Ibrahim M. Alhazza
- King Saud University, Zoology Department, College of Science, Riyadh 11451, Saudi Arabia (I.M.A.)
| | - Marian Valko
- Faculty Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovakia;
- King Saud University, Zoology Department, College of Science, Riyadh 11451, Saudi Arabia (I.M.A.)
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Cruz MAE, Soares MPR, Pazin W, Ito AS, Fukada SY, Ciancaglini P, Ramos AP. Interface-driven Sr-morin complexation at Langmuir monolayers for bioactive coating design. Colloids Surf B Biointerfaces 2019; 181:856-863. [PMID: 31382333 DOI: 10.1016/j.colsurfb.2019.06.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 06/07/2019] [Accepted: 06/17/2019] [Indexed: 11/19/2022]
Abstract
Flavonoid-metal complexes are widely studied because of their interesting luminescent behavior and biological activity. Despite the extensive exploration of flavonoid-metal coordination processes in solution, the formation of complexes using the flavonoid molecule inserted in a lipid membrane has been little investigated. This effect could provide important insight into the biological activity of flavonoids at lipid membranes and could represent an attractive strategy to design supramolecular structures. Here, we studied the complexation between Sr2+ and morin inserted in an octadecylphosphonic acid (OPA) Langmuir monolayer. This is a relevant system due to the synergism imposed by the association of the Sr2+ ability to control bone formation/resorption with the morin antioxidative effect. Morin incorporation into the OPA monolayers and further Sr2+ complexation were monitored by surface pressure isotherms. Electronic absorption spectroscopy and fluorescence techniques showed Sr-morin complexation both in solution and at the air-liquid interface. Although morin complexation has been described to occur only at basic pH, the specific thermodynamic properties at the air-liquid interface drove metal complexation. LB films were deposited on Ti surfaces, and the resulting OPA/Sr-morin coatings exhibited high surface free energy and increase on its polar component. This optimized surface feature supported further serum protein adsorption and osteoblast growth and differentiation, indicating that these lipid-based coatings are promising for bioactive coating design. This study paves the way for the use of this lipid-based coating in the design of implants for faster osteointegration. Moreover, flavonoid-metal complexation at membranes could also help to shed light on the biological role played by flavonoids.
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Affiliation(s)
- M A E Cruz
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Química, Brazil
| | - M P R Soares
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Brazil
| | - W Pazin
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Física, Brazil; Faculdade de Ciências e Tecnologia, Universidade Estadual Paulista, Departamento de Física, Brazil
| | - A S Ito
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Física, Brazil
| | - S Y Fukada
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Brazil
| | - P Ciancaglini
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Química, Brazil
| | - A P Ramos
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Química, Brazil.
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Lutoshkin MA, Petrov AI, Kuznetsov BN, Kazachenko AS. Aqueous Complexation of Morin and Its Sulfonate Derivative with Lanthanum(III) and Trivalent Lanthanides. J SOLUTION CHEM 2019. [DOI: 10.1007/s10953-019-00877-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Cruz MAE, Tovani CB, Favarin BZ, Soares MPR, Fukada SY, Ciancaglini P, Ramos AP. Synthesis of Sr-morin complex and its in vitro response: decrease in osteoclast differentiation while sustaining osteoblast mineralization ability. J Mater Chem B 2019; 7:823-829. [PMID: 32254857 DOI: 10.1039/c8tb02045k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Strontium ranelate (SrR) has been used as the ultimate choice for osteoporosis treatment. However, the development of more tolerable and bioactive Sr2+ carriers is still a need. The design of Sr2+-based platforms has moved towards the obtention of anion carriers that can also exhibit a positive effect on bone metabolism. In this sense, we used morin, a natural flavonoid, as a new arrangement for Sr2+ carriage in the synthesis of an Sr2+ complex. It has been claimed that phenolic compounds promote bone health. Therefore, we hypothesized that the association of Sr2+ with morin could improve its anabolic effects. Complexes with the general formula [(C15H9O7)Sr(H2O)2]Cl·3H2O were synthesized and characterized by elemental analysis, thermogravimetry, UV-Vis and infrared absorption spectroscopies and 1H-nuclear magnetic resonance. We showed that the complexation between morin and Sr2+ occurred among the 3-OH and 4C[double bond, length as m-dash]O groups of morin. Preosteoclasts cultures with the Sr-morin complex exhibited a reduced osteoclast differentiation rate and sustained osteoblast mineralization ability. The response of Sr-morin was higher than that observed for SrR at the same concentration range. Considering the above-mentioned observations, the Sr-morin complex could be an interesting approach to be further exploited not only as an alternative treatment for osteoporosis but also in the design of materials for faster osteointegration.
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Affiliation(s)
- Marcos A E Cruz
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto - Universidade de São Paulo - Departamento de Química, Brazil.
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Recent progress in synthesis and characterization of metal chalcone complexes and their potential as bioactive agents. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.05.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Tian Z, Cui H, Liu H, Dong J, Dong H, Zhao L, Li X, Zhang Y, Huang Y, Song L, Bian L, Wang Y, Xu X, Wang C. Study on the interaction between the 1,4,5,8-naphthalene diimide-spermine conjugate (NDIS) and DNA using a spectroscopic approach and molecular docking. MEDCHEMCOMM 2017; 8:2079-2092. [PMID: 30108725 PMCID: PMC6072523 DOI: 10.1039/c7md00389g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 09/26/2017] [Indexed: 01/23/2023]
Abstract
The interaction of herring sperm DNA with the 1,4,5,8-naphthalene diimide-spermine conjugate (NDIS) was studied by UV/vis absorption, fluorescence and CD spectroscopic methods. Compared with the 1,8-naphthalimide-spermidine conjugate (NIS), the values of KSV (quenching constant) and Kb (binding constant) of NDIS were larger, and the hypochromic effect in the UV/vis spectra and the quenching effect in the fluorescence of NDIS were more significant. The interaction mode between NDIS and DNA was mainly groove binding. The fluorescence experiments at varying temperatures showed that the binding process of NDIS and DNA was static, as both hydrogen bonds and hydrophobic forces played a major role in the binding of NDIS and DNA. The CD spectrum indicated that NDIS caused a conformational change, like the B to A-DNA transition, and the tests using KI and NaCl and 1H NMR spectroscopy indicated that NDIS was not a classical DNA inserter. All the results demonstrated that both the polyamine side chain and the aromatic rings affect the process of NDIS binding to DNA, which is thus obviously different from that of NIS. The conclusion was confirmed by the in silico molecular docking experiments.
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Affiliation(s)
- Zhiyong Tian
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Hailong Cui
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - He Liu
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Jun Dong
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Huanyang Dong
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Luyao Zhao
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Xueting Li
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Yan Zhang
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Yingying Huang
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Lina Song
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Longxiang Bian
- The Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng 475004 , China . ; ; Tel: +86 18621534352 ; Tel: +86 13619810550
| | - Yuxia Wang
- Institute of Chemical Biology , Henan University , Kaifeng 475004 , China . ; Tel: +86 18739998722
| | - Xuejun Xu
- The Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng 475004 , China . ; ; Tel: +86 18621534352 ; Tel: +86 13619810550
| | - Chaojie Wang
- The Key Laboratory of Natural Medicine and Immuno-Engineering , Henan University , Kaifeng 475004 , China . ; ; Tel: +86 18621534352 ; Tel: +86 13619810550
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Woźnicka E, Zapała L, Pieniążek E, Kosińska M, Ciszkowicz E, Lecka-Szlachta K, Pusz J, Maciołek U, Dronka J. Synthesis, characterization and antibacterial studies of Tm(III), Yb(III) and Lu(III) complexes of morin. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1291935] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Elżbieta Woźnicka
- Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Rzeszow University of Technology, Rzeszow, Poland
| | - Lidia Zapała
- Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Rzeszow University of Technology, Rzeszow, Poland
| | - Elżbieta Pieniążek
- Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Rzeszow University of Technology, Rzeszow, Poland
| | - Małgorzata Kosińska
- Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Rzeszow University of Technology, Rzeszow, Poland
| | - Ewa Ciszkowicz
- Faculty of Chemistry, Department of Biochemistry and Biotechnology, Rzeszow University of Technology, Rzeszow, Poland
| | - Katarzyna Lecka-Szlachta
- Faculty of Chemistry, Department of Biochemistry and Biotechnology, Rzeszow University of Technology, Rzeszow, Poland
| | - Janusz Pusz
- Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Rzeszow University of Technology, Rzeszow, Poland
| | - Urszula Maciołek
- Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, Rzeszow University of Technology, Rzeszow, Poland
| | - Janusz Dronka
- Faculty of Mathematics and Applied Physics, Rzeszow University of Technology, Rzeszow, Poland
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Munteanu AC, Badea M, Olar R, Silvestro L, Dulea C, Negut CD, Uivarosi V. Synthesis and Structural Investigation of New Bio-Relevant Complexes of Lanthanides with 5-Hydroxyflavone: DNA Binding and Protein Interaction Studies. Molecules 2016; 21:molecules21121737. [PMID: 27999283 PMCID: PMC6273368 DOI: 10.3390/molecules21121737] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/12/2016] [Accepted: 12/13/2016] [Indexed: 11/16/2022] Open
Abstract
In the present work, we attempted to develop new metal coordination complexes of the natural flavonoid 5-hydroxyflavone with Sm(III), Eu(III), Gd(III), Tb(III). The resultant hydroxo complexes have been characterized by a variety of spectroscopic techniques, including fluorescence, FT-IR, UV-Vis, EPR and mass spectral studies. The general chemical formula of the complexes is [Ln(C15H₉O₃)₃(OH)₂(H₂O)x]·nH₂O, where Ln is the lanthanide cation and x = 0 for Sm(III), x = 1 for Eu(III), Gd(III), Tb(III) and n = 0 for Sm(III), Gd(III), Tb(III), n = 1 for Eu(III), respectively. The proposed structures of the complexes were optimized by DFT calculations. Theoretical calculations and experimental determinations sustain the proposed structures of the hydroxo complexes, with two molecules of 5-hydroxyflavone acting as monoanionic bidentate chelate ligands. The interaction of the complexes with calf thymus DNA has been explored by fluorescence titration and UV-Vis absorption binding studies, and revealed that the synthesized complexes interact with DNA with binding constants (Kb) ~ 10⁴. Human serum albumin (HSA) and transferrin (Tf) binding studies have also been performed by fluorescence titration techniques (fluorescence quenching studies, synchronous fluorescence spectra). The apparent association constants (Ka) and thermodynamic parameters have been calculated from the fluorescence quenching experiment at 299 K, 308 K, and 318 K. The quenching curves indicate that the complexes bind to HSA with smaller affinity than the ligand, but to Tf with higher binding affinities than the ligand.
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Affiliation(s)
- Alexandra-Cristina Munteanu
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, 6 Traian Vuia Str., 020956 Bucharest, Romania.
| | - Mihaela Badea
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Rodica Olar
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 90-92 Panduri Str., 050663 Bucharest, Romania.
| | - Luigi Silvestro
- PharmaServ. International SRL, 52 Sabinelor Str., 050853 Bucharest, Romania.
| | - Constanţa Dulea
- PharmaServ. International SRL, 52 Sabinelor Str., 050853 Bucharest, Romania.
| | - Constantin-Daniel Negut
- Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), IRASM Radiation Processing Department, Reactorului Str. 30, 077125 Magurele-Ilfov, Romania.
| | - Valentina Uivarosi
- Department of General and Inorganic Chemistry, Faculty of Pharmacy, "Carol Davila" University of Medicine and Pharmacy, 6 Traian Vuia Str., 020956 Bucharest, Romania.
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12
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Synthesis, characterization, and antioxidant activity of Zn 2+ and Cu 2+ coordinated polyhydroxychalcone complexes. MONATSHEFTE FUR CHEMIE 2016; 147:1871-1881. [PMID: 27795583 PMCID: PMC5063914 DOI: 10.1007/s00706-016-1822-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 07/11/2016] [Indexed: 11/02/2022]
Abstract
ABSTRACT Four new metal complexes [Cu(ISO)2], [Cu(BUT)2] and [Zn(ISO)2], [Zn(BUT)2] of the polyhydroxychalcones (isoliquiritigenin and butein) are synthesized, structurally characterized and their antioxidant activity is investigated. The formation of the complexes [Cu(ISO)2] and [Zn(ISO)2] is followed by Job's plot using NMR titration. The resulting compounds are characterized by mass spectrometry, IR spectroscopy, and elemental analysis. Studies on the radical scavenging activity are performed using DPPH as substrate. The results showed that the antioxidant activities of isoliquiritigenin and butein are enhanced after binding to copper or zinc. GRAPHICAL ABSTRACT
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13
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Islam N. Investigation of comparative shielding of Morin against oxidative damage by radicals: A DFT study. ACTA ACUST UNITED AC 2015. [DOI: 10.1080/23312009.2015.1078272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Kasprzak MM, Erxleben A, Ochocki J. Properties and applications of flavonoid metal complexes. RSC Adv 2015. [DOI: 10.1039/c5ra05069c] [Citation(s) in RCA: 225] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Flavonoid metal complexes have a wide spectrum of activities as well as potential and actual applications.
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Affiliation(s)
- Maria M. Kasprzak
- Department of Bioinorganic Chemistry
- Medical University of Lodz
- Lodz
- Poland
| | - Andrea Erxleben
- School of Chemistry
- National University of Ireland
- Galway
- Ireland
| | - Justyn Ochocki
- Department of Bioinorganic Chemistry
- Medical University of Lodz
- Lodz
- Poland
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15
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Syntheses, crystal structures and antioxidant study of Zn(II) complexes with morin-5′-sulfonic acid (MSA). J Inorg Biochem 2014; 141:180-187. [DOI: 10.1016/j.jinorgbio.2014.09.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/09/2014] [Accepted: 09/09/2014] [Indexed: 11/20/2022]
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16
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Abstract
Flavonoids have attracted increased attention due to their broad bioactivities related to health and diseases. Modulating metal homeostasis may play an important role in their bioactivities. Recent studies have suggested that dietary flavonoids may affect zinc homeostasis, uptake, and transport. In this work, the zinc-binding sites on a few selected flavonoids have been investigated by (1)H NMR spectroscopy under physiological relevant pH and the species formed were verified by mass spectrometry. Zinc binding induces distinct changes in the proton resonances on the flavonoid rings, providing useful information to locate the Zn-binding sites. No Zn-binding was observed with flavone which lacks a chelation site. Zinc was found to bind to the 3-hydroxyl-4-keto, catechol, and 5-hydroxyl-4-keto chelation sites of flavonol, 3',4'-dihydroxylflavone and chrysin, respectively. Kaempferol and myricetin chelate zinc at the 3-hydroxyl-4-keto site while rutin binds zinc preferentially at the 5-hydroxyl-4-keto site. However, morin appears to bind zinc at the 1-ether-2-hydroxyl site.
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Affiliation(s)
- Yibin Wei
- Department of Chemistry and Biochemistry and UMass Cranberry Health Research Center, University of Massachusetts, Dartmouth, MA, 02747, USA
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17
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Kondath S, Srinivas Raghavan B, Anantanarayanan R, Rajaram R. Synthesis and characterisation of morin reduced gold nanoparticles and its cytotoxicity in MCF-7 cells. Chem Biol Interact 2014; 224:78-88. [PMID: 25446498 DOI: 10.1016/j.cbi.2014.09.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 09/09/2014] [Accepted: 09/21/2014] [Indexed: 01/23/2023]
Abstract
There is significant interest in investigating the therapeutic potential of phytochemical reduced and bound gold nanoparticles (AuNPs) as it bridges the gap between nanotechnology and therapy. In the present study, AuNPs prepared using the flavonoid morin (mAuNPs) are characterised and have been studied for their anti-cancer effects. The -OH groups of morin reduce Au(3+) and stabilize Au(0) to form spherical and crystalline mAuNPs. These mAuNPs are biocompatible towards normal human blood cells and breast epithelial cells. Through TEM analysis, we report that they are readily taken up by breast cancer cells (MCF-7) to induce cell death. Apoptosis has also been assessed by other morphological observations and cell viability studies. Flow cytometric studies reveal that the cells undergo a transient phase of apoptosis progressing towards secondary necrosis as the dose and time of mAuNPs treatment increases. The ability of mAuNPs to induce cell death in MCF-7 cells indicates its potential as an anti-cancer agent.
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Affiliation(s)
- Sindhu Kondath
- Biochemistry Laboratory, Central Leather Research Institute, Adyar, Chennai, India
| | | | | | - Rama Rajaram
- Biochemistry Laboratory, Central Leather Research Institute, Adyar, Chennai, India.
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18
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19
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Synthesis of Cr(III)-morin complex: characterization and antioxidant study. ScientificWorldJournal 2014; 2014:845208. [PMID: 24688439 PMCID: PMC3928855 DOI: 10.1155/2014/845208] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/24/2013] [Indexed: 11/18/2022] Open
Abstract
The complex formation between Cr(III) and morin was carried out in methanol and confirmed by analytical characterization using UV-Vis, IR, 1H NMR, and TG-DTA. UV-Vis shows significant bathochromic shift in benzoyl upon coordination as well as IR well illustrates the peak shift of C=O group and formation of a O–Cr(III) bond. Likewise, 1H NMR studies clarify that Cr(III) metal ion replaces the 5OH proton hence; 5-hydroxy-4-keto site is employed by morin in chelation to form six-membered stable ring system out of three available chelating sites. In addition, TG-DTA denotes the presence of coordinated and crystalline water molecules. The melting point of the complex was found to be 389°C by DSC. In addition, Cr(III)-morin complex was found to be a more potent antioxidant than morin as evaluated by DPPH• and FRAP methods.
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Biological evaluation of morin and its new oxovanadium(IV) complex as antio-xidant and specific anti-cancer agents. Chem Biol Interact 2013; 206:289-301. [DOI: 10.1016/j.cbi.2013.10.006] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 09/14/2013] [Accepted: 10/05/2013] [Indexed: 11/22/2022]
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21
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Pillai SI, Subramanian SP, Kandaswamy M. A novel insulin mimetic vanadium-flavonol complex: synthesis, characterization and in vivo evaluation in STZ-induced rats. Eur J Med Chem 2013; 63:109-17. [PMID: 23466606 DOI: 10.1016/j.ejmech.2013.02.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Revised: 01/31/2013] [Accepted: 02/02/2013] [Indexed: 01/28/2023]
Abstract
Since 1985, when Heyliger et al., first demonstrated a serendipitous discovery that oral administration of 0.8 mg/ml of sodium orthovanadate in drinking water to streptozotocin-induced diabetic rats resulted in normoglycemia, numerous extensive studies have been pursued on the anti-diabetic and insulinomimetic actions of vanadium. The acceptance of vanadium compounds as promising therapeutic antidiabetic agents has been slowed due to the concern for chronic toxicity associated with vanadium accumulation. In order to circumvent the toxic effects of vanadium, we have taken up a combinational approach wherein a novel vanadium-flavonol complex was synthesized, characterized and its toxic as well as insulin mimetic potential was evaluated in STZ-induced experimental diabetes in rats. The results indicate that the complex is non-toxic and possess anti-diabetic activity.
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Affiliation(s)
- Subramanian Iyyam Pillai
- Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, Tamil Nadu, India
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22
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D'Aléo A, Fages F. Boron difluoride complexes of 3-hydroxyflavone derivatives: efficient bioinspired dyes for solution and solid-state emission. Photochem Photobiol Sci 2013. [DOI: 10.1039/c2pp25300c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Citta A, Folda A, Scutari G, Cesaro L, Bindoli A, Rigobello MP. Inhibition of thioredoxin reductase by lanthanum chloride. J Inorg Biochem 2012; 117:18-24. [DOI: 10.1016/j.jinorgbio.2012.08.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 08/22/2012] [Accepted: 08/24/2012] [Indexed: 11/30/2022]
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24
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Jabbari M, Gharib F. Solvent dependence on antioxidant activity of some water-insoluble flavonoids and their cerium(IV) complexes. J Mol Liq 2012. [DOI: 10.1016/j.molliq.2012.02.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Panhwar QK, Memon S. Synthesis and properties of zirconium(IV) and molybdate(II) morin complexes. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.668617] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Qadeer K. Panhwar
- a Dr. M.A. Kazi Institute of Chemistry, University of Sindh , Jamshoro , Pakistan
- b National Center of Excellence in Analytical Chemistry, University of Sindh , Jamshoro 76080 , Pakistan
| | - Shahabuddin Memon
- b National Center of Excellence in Analytical Chemistry, University of Sindh , Jamshoro 76080 , Pakistan
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26
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Jabbari M, Gharib F. Kinetics and mechanism of naringenin reaction with Ce(IV) in different aqueous solutions of dimethylsulfoxide. INT J CHEM KINET 2011. [DOI: 10.1002/kin.20585] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Verdan AM, Wang HC, García CR, Henry WP, Brumaghim JL. Iron binding of 3-hydroxychromone, 5-hydroxychromone, and sulfonated morin: Implications for the antioxidant activity of flavonols with competing metal binding sites. J Inorg Biochem 2011; 105:1314-22. [DOI: 10.1016/j.jinorgbio.2011.07.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 07/19/2011] [Accepted: 07/20/2011] [Indexed: 10/17/2022]
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28
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29
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Panhwar QK, Memon S. Synthesis and evaluation of antioxidant and antibacterial properties of morin complexes. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.590192] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Qadeer K. Panhwar
- a Dr M.A. Kazi Institute of Chemistry, University of Sindh , Jamshoro, Pakistan
- b National Center of Excellence in Analytical Chemistry, University of Sindh , Jamshoro 76080, Pakistan
| | - Shahabuddin Memon
- a Dr M.A. Kazi Institute of Chemistry, University of Sindh , Jamshoro, Pakistan
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30
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Fang X, Chen R, Xiao L, Chen Q. Synthesis and characterization of Sm(III)-hyperbranched poly(ester-amide) complex. POLYM INT 2010. [DOI: 10.1002/pi.2922] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Panhwar QK, Memon S, Bhanger M. Synthesis, characterization, spectroscopic and antioxidation studies of Cu(II)–morin complex. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2009.12.037] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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32
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Yang T, Feng J. Preparation of novel lanthanide complexes with hindered amine via solid-state reaction and preliminary evaluation of their efficiency as light stabilizers. J Appl Polym Sci 2010. [DOI: 10.1002/app.31998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Tan M, Zhu J, Pan Y, Chen Z, Liang H, Liu H, Wang H. Synthesis, cytotoxic activity, and DNA binding properties of copper (II) complexes with hesperetin, naringenin, and apigenin. Bioinorg Chem Appl 2009; 2009:347872. [PMID: 19830248 PMCID: PMC2760321 DOI: 10.1155/2009/347872] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 07/28/2009] [Accepted: 08/04/2009] [Indexed: 11/17/2022] Open
Abstract
Complexes of copper (II) with hesperetin, naringenin, and apigenin of general composition [CuL(2)(H(2)O)(2)] nH(2)O (1-3) have been synthesized and characterized by elemental analysis, UV-Vis, FT-IR, ESI-MS, and TG-DTG thermal analysis. The free ligands and the metal complexes have been tested in vitro against human cancer cell lines hepatocellular carcinoma (HepG-2), gastric carcinomas (SGC-7901), and cervical carcinoma (HeLa). Complexes 1 and 3 were found to exhibit growth inhibition of SGC-7901 and HepG2 cell lines with respect to the free ligands; the inhibitory rate of complex 1 is 43.2% and 43.8%, while complex 3 is 46% and 36%, respectively. The interactions of complex 1 and its ligand Hsp with calf thymus DNA were investigated by UV-Vis, fluorescence, and CD spectra. Both complex 1 and Hsp were found to bind DNA in intercalation modes, and the binding affinity of complex 1 was stronger than that of free ligand.
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Affiliation(s)
- Mingxiong Tan
- The Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China
- Department of Chemistry and Biology, Yulin Normal College, Yulin 537000, China
| | - Jinchan Zhu
- The Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China
| | - Yingming Pan
- The Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China
| | - Zhenfeng Chen
- The Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China
| | - Hong Liang
- The Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China
| | - Huagang Liu
- Department of Pharmacology, Guangxi Medical University, Nanning 530021, China
| | - Hengshan Wang
- The Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China
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Zhang G, Guo J, Pan J, Chen X, Wang J. Spectroscopic studies on the interaction of morin–Eu(III) complex with calf thymus DNA. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.02.011] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Phaniband MA, Avaji PG, Dhumwad SD. Synthesis, spectral characterization and biological evaluation of some Lanthanide(III) complexes of Schiff bases of carbostyril derivatives. MAIN GROUP CHEMISTRY 2008. [DOI: 10.1080/10241220802688442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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36
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Selective solid phase extraction of trace Sc(III) from environmental samples using silica gel modified with 4-(2-morinyldiazenyl)-N-(3-(trimethylsilyl)propyl)benzamide. Anal Chim Acta 2008; 629:84-91. [DOI: 10.1016/j.aca.2008.09.039] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2008] [Revised: 09/10/2008] [Accepted: 09/12/2008] [Indexed: 11/20/2022]
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37
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Shariati S, Yamini Y, Faraji M, Saleh A. On-line solid phase extraction coupled to ICP-OES for simultaneous preconcentration and determination of some transition elements. Mikrochim Acta 2008. [DOI: 10.1007/s00604-008-0099-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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38
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Reaction of Cd(II)–Morin with dsDNA for biosensing of ssDNA oligomers with complementary, GCE-immobilized ssDNA. Bioelectrochemistry 2008; 73:64-9. [DOI: 10.1016/j.bioelechem.2008.04.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2008] [Revised: 04/17/2008] [Accepted: 04/21/2008] [Indexed: 01/09/2023]
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