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Zahirović A, Fočak M, Fetahović S, Tüzün B, Višnjevac A, Muzika V, Brulić MM, Žero S, Čustović S, Crans DC, Roca S. Hydrazone-flavonol based oxidovanadium(V) complexes: Synthesis, characterization and antihyperglycemic activity of chloro derivative in vivo. J Inorg Biochem 2024; 258:112637. [PMID: 38876026 DOI: 10.1016/j.jinorgbio.2024.112637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 06/16/2024]
Abstract
Wet synthesis approach afforded four new heteroleptic mononuclear neutral diamagnetic oxidovanadium(V) complexes, comprising salicylaldehyde-based 2-furoic acid hydrazones and a flavonol coligand of the general composition [VO(fla)(L-ONO)]. The complexes were comprehensively characterized, including chemical analysis, conductometry, infrared, electronic, and mass spectroscopy, as well as 1D 1H and proton-decoupled 13C(1H) NMR spectroscopy, alongside extensive 2D 1H1H COSY, 1H13C HMQC, and 1H13C HMBC NMR analyses. Additionally, the quantum chemical properties of the complexes were studied using Gaussian at the B3LYP, HF, and M062X levels on the 6-31++g(d,p) basis sets. The interaction of these hydrolytically inert vanadium complexes and the BSA was investigated through spectrofluorimetric titration, synchronous fluorimetry, and FRET analysis in a temperature-dependent manner, providing valuable thermodynamic insights into van der Waals interactions and hydrogen bonding. Molecular docking was conducted to gain further understanding of the specific binding sites of the complexes to BSA. Complex 2, featuring a 5-chloro-substituted salicylaldehyde component of the hydrazone, was extensively examined for its biological activity in vivo. The effects of complex administration on biochemical and hematological parameters were evaluated in both healthy and diabetic Wistar rats, revealing antihyperglycemic activity at millimolar concentration. Furthermore, histopathological analysis and bioaccumulation studies of the complex in the brain, kidneys, and livers of healthy and diabetic rats revealed the potential for further development of vanadium(V) hydrazone complexes as antidiabetic and insulin-mimetic agents.
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Affiliation(s)
- Adnan Zahirović
- Laboratory for Inorganic and Bioinorganic Chemistry, Department of Chemistry, Faculty of Science, University of Sarajevo, Sarajevo, Bosnia and Herzegovina.
| | - Muhamed Fočak
- Department of Biology, Faculty of Science, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Selma Fetahović
- Laboratory for Inorganic and Bioinorganic Chemistry, Department of Chemistry, Faculty of Science, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Burak Tüzün
- Plant and Animal Production Department, Technical Sciences Vocational School of Sivas, Sivas Cumhuriyet University, Sivas, Turkey
| | - Aleksandar Višnjevac
- Laboratory for Chemical and Biological Crystallography, Division of Physical Chemistry, Ruđer Bošković Institute, Zagreb, Croatia
| | - Višnja Muzika
- Department of Histology and Embryology, Faculty of Medicine, University of Sarajevo, Bosnia and Herzegovina
| | - Maja Mitrašinović Brulić
- Department of Biology, Faculty of Science, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Sabina Žero
- Laboratory for Inorganic and Bioinorganic Chemistry, Department of Chemistry, Faculty of Science, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Samra Čustović
- Department of Histology and Embryology, Faculty of Medicine, University of Sarajevo, Bosnia and Herzegovina
| | - Debbie C Crans
- Cell & Molecular Biology Program, Colorado State University, Fort Collins, USA
| | - Sunčica Roca
- NMR Centre, Ruđer Bošković Institute, Zagreb, Croatia.
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Zaki M, Hairat S, Kamaal S, Aljarba NH, AL–Johani NS, Alkahtani S. Synthesis, crystal structure elucidation and DNA/HSA binding profile of Ni(II) complex of Schiff base derived from 3–ethoxy salicylaldehyde and o–phenylenediamine. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Al-Rashdi KS, Babgi BA, Ali EMM, Davaasuren B, Jedidi A, Emwas AHM, Alrayyani MA, Jaremko M, Humphrey MG, Hussien MA. Tuning the anticancer properties of Pt(ii) complexes via structurally flexible N-(2-picolyl)salicylimine ligands. RSC Adv 2022; 12:27582-27595. [PMID: 36276022 PMCID: PMC9514381 DOI: 10.1039/d2ra04992a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/17/2022] [Indexed: 09/12/2023] Open
Abstract
Three tridentate Schiff base ligands were synthesized from the reactions between 2-picolylamine and salicylaldehyde derivatives (3-ethoxy (OEt), 4-diethylamino (NEt2) and 4-hydroxy (OH)). Complexes with the general formula Pt(N^N^O)Cl were obtained from reactions between the ligands and K2PtCl4. The ligands and their complexes were characterized by NMR spectroscopy, mass spectrometry and elemental analysis. Further confirmation of the structure of Pt-OEt was achieved by single-crystal X-ray diffraction. The DMSO/chlorido exchange process at Pt-OEt was investigated by monitoring the change in conductivity, revealing very slow dissociation in DMSO. Moreover, solvent/chlorido exchange for Pt-OEt and Pt-NEt2 were investigated by NMR spectroscopy in DMSO and DMSO/D2O; Pt-NEt2 forms an adduct with DMSO while Pt-OEt forms adducts with DMSO and water. The DNA-binding behaviour of the platinum(ii) complexes was investigated by two techniques. Pt-NEt2 has the best apparent binding constant. The intercalation mode of interaction with ct-DNA was suggested by molecular docking studies and the increase in the relative viscosity of ct-DNA with increasing concentrations of the platinum(ii) complexes. However, the gradual decrease in the relative viscosity over time at constant concentration of platinum(ii) complexes indicated a shift from intercalation to a covalent binding mode. Anticancer activities of the ligands and their platinum(ii) complexes were examined against two cell lines. The platinum(ii) complexes exhibit superior cytotoxicity to that of their ligands. Among the platinum(ii) complexes, Pt-OEt possesses the best IC50 against both cell lines, its cytotoxicity being comparable to that observed for cisplatin. Cell cycle arrest in the HepG2 cell line upon treatment with Pt-OEt and Pt-NEt2 was investigated and compared to that of cisplatin; the change in the cell accumulation patterns supports the presumption of an apoptotic cell death pathway. The optimized structures of the B-DNA trimer adducts with the platinum complexes showed hydrogen-bonding interactions between the ligands and nucleobases, affecting the inter-strand hydrogen bonding within the DNA, and highlighting the strong ability of the complexes to induce conformational changes in the DNA, leading to the activation of apoptotic cell death. In summary, the current study demonstrates promising new anticancer platinum(ii) complexes with highly flexible tridentate ligands; the functional groups on the ligands are important in tuning their DNA binding/anticancer properties.
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Affiliation(s)
- Kamelah S Al-Rashdi
- Department of Chemistry, Faculty of Science, King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia +966 555563702
| | - Bandar A Babgi
- Department of Chemistry, Faculty of Science, King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia +966 555563702
| | - Ehab M M Ali
- Department of Biochemistry, Faculty of Science, King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia
- Division of Biochemistry, Department of Chemistry, Faculty of Science, Tanta University Tanta 31527 Egypt
| | - Bambar Davaasuren
- Core Labs, King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
| | - Abdesslem Jedidi
- Department of Chemistry, Faculty of Science, King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia +966 555563702
| | - Abdul-Hamid M Emwas
- Core Labs, King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
| | - Maymounah A Alrayyani
- Department of Chemistry, Faculty of Science, King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia +966 555563702
| | - Mariusz Jaremko
- Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
| | - Mark G Humphrey
- Research School of Chemistry, Australian National University Canberra ACT 2601 Australia
| | - Mostafa A Hussien
- Department of Chemistry, Faculty of Science, King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia +966 555563702
- Department of Chemistry, Faculty of Science, Port Said University Port Said 42521 Egypt
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Dehghani FS, Kalantari R, Rastegari B, Asadi Z. Water-soluble nickel (II) Schiff base complexes: Synthesis, structural characterization, DNA binding affinity, DNA cleavage, cytotoxicity, and computational studies. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2022; 42:234-261. [PMID: 36106987 DOI: 10.1080/15257770.2022.2121838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Two water-soluble nickel (II) Schiff base complexes were prepared and their interaction with fish sperm DNA (FS-DNA) was investigated by various methods including UV-vis spectroscopy, fluorescence spectroscopy, cyclic voltammetry, and viscometric measurements. Complex 1: [N,N'-bis{5-[(triphenyl phosphonium chloride)-methyl] salicylidine}-3,4-diaminobenzophenone]nickel(II) perchloride dihydrate: [Ni(5-CH2PPh3-3,4-salophen)] (ClO4)2.2 H2O was synthesized as a new complex and characterized by elemental analysis, IR, 1H NMR, thermal gravimetric analysis (TGA) and UV-vis spectroscopy. Complex 2: sodium [(N,N'-bis(5-sulfosalicyliden)-3, 4-diaminobenzophenone)aqua] nickel(II) hydrate: Na2[Ni (5-SO3-3,4-salbenz)(H2O)]. H2O was already synthesized by our research team, but in this study, its function as a DNA-binding compound was tested, and compared with the results of complex 1-DNA binding. The calculation of different constants using absorption and emission data, all confirmed the stronger binding ability of complex 1 than complex 2 with DNA. Different thermodynamic parameters showed the interactions between DNA and complexes were the type of hydrophobic interaction for complex 1 and electrostatic interaction for complex 2. Also, the negative values of free energy changes proved a spontaneous DNA binding process. Based on cell toxicity assay against two different cell lines including Jurkat and MCF-7, the effect of complex 1 was comparable to cisplatin, and the toxicity mechanism was further justified by bright field microscopy, flow cytometry, and cleavage of DNA in the presence of H2O2. Besides, the docking calculations suggested intercalation after measuring the lowest-energy between the complexes and DNA. For both complexes, all analytical, spectroscopic, and molecular modeling methods supported partial intercalation as the main binding mode between the complexes and DNA.
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Affiliation(s)
| | - Razieh Kalantari
- Department of Chemistry, School of Sciences, Shiraz University, Shiraz, Iran
| | - Banafsheh Rastegari
- Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz University of Medical Science, Shiraz, Iran
| | - Zahra Asadi
- Department of Chemistry, School of Sciences, Shiraz University, Shiraz, Iran
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Keshavarzian E, Asadi Z, Poupon M, Dusek M, Rastegari B. A New Heterotrimetallic Sandwich‐like Cu
II
‐La
III
‐Cu
II
(3d‐4f‐3d) Cluster as a Model Anticancer Drug in Interaction with FS‐DNA & BSA and as a New Artificial Catalyst for Catecholase Activity. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elahe Keshavarzian
- Department of Chemistry, School of Sciences Shiraz University Shiraz Iran
| | - Zahra Asadi
- Department of Chemistry, School of Sciences Shiraz University Shiraz Iran
| | | | | | - Banafsheh Rastegari
- Diagnostic laboratory sciences and technology research center, paramedical School Shiraz University of Medical Sciences Shiraz Iran
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Mohebbi Jahromi Z, Asadi Z, Eigner V, Dusek M, Rastegari B. A new phenoxo-bridged dicopper Schiff base Complex: Synthesis, Crystal Structure, DNA/BSA Interaction, Cytotoxicity Assay and Catecholase Activity. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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The interaction studies of novel imine ligands and palladium(II) complexes with DNA and BSA for drug delivery application: the anti-cancer activity and molecular docking evaluation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8
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Aggarwal R, Hooda M, Kumar P, Jain N, Dubey GP, Chugh H, Chandra R. Visible-Light-Prompted Synthesis and Binding Studies of 5,6-Dihydroimidazo[2,1- b]thiazoles with BSA and DNA Using Biophysical and Computational Methods. J Org Chem 2022; 87:3952-3966. [PMID: 35235320 DOI: 10.1021/acs.joc.1c02471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Fused heterocyclic systems containing a bridgehead nitrogen atom have emerged as imperative pharmacophores in the design and development of new drugs. Among these heterocyclic moieties, the imidazothiazole scaffold has long been used in medicinal chemistry for the treatment of various diseases. In this study, we have established a simplistic and environmentally safe regioselective protocol for the synthesis of 5,6-dihydroimidazo[2,1-b]thiazole derivatives from easily available reactants. The reaction proceeds through in situ formation of the α-bromodiketones ensuing trap with imidazolidine-2-thione to provide these versatile bicyclic heterocycles in excellent yields. The synthesized compounds were screened through the molecular docking approach for the most stable complex formation with bovine serum albumin (BSA) and calf thymus deoxyribonucleic acid (ctDNA). The selected compound was further studied using ex vivo binding studies, which revealed moderate interactions with BSA and ctDNA. The binding studies were performed using biophysical approaches including UV-visible spectroscopy, steady-state fluorescence, circular dichroism (CD), and viscosity parameters.
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Affiliation(s)
- Ranjana Aggarwal
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, Haryana, India.,CSIR-National Institute of Science Communication and Policy Research, New Delhi 110012, India
| | - Mona Hooda
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, Haryana, India
| | - Prince Kumar
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, Haryana, India
| | - Naman Jain
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, Haryana, India
| | - Gyan Prakash Dubey
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, Haryana, India
| | - Heerak Chugh
- Department of Chemistry, University of Delhi, New Delhi 110007, India
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, New Delhi 110007, India
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Collaboration between 3d-4f metal centers of heterodimetallic Ni(II)-Gd(III) complex in catecholase activity and interaction with FS-DNA & BSA. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115758] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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10
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Fouad R, Shebl M, Saif M, Gamal S. Novel copper nano-complex based on tetraazamacrocyclic backbone: Template synthesis, structural elucidation, cytotoxic, DNA binding and molecular docking studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Pessoa JC, Santos MF, Correia I, Sanna D, Sciortino G, Garribba E. Binding of vanadium ions and complexes to proteins and enzymes in aqueous solution. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214192] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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CT-DNA/HSA binding interactions and cytotoxicity activity of a new copper(II) complex. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Evaluation of the Anticancer and DNA-Binding Characteristics of Dichloro(diimine)zinc(II) Complexes. CHEMISTRY 2021. [DOI: 10.3390/chemistry3040086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Several metal diimine complexes have been reported to possess anticancer properties. To evaluate the anticancer properties of tetrahedral zinc(II) diimine complexes, six complexes were synthesized with the general formula M(N^N)Cl2 {where M = Zn, Pt and N^N = 2,2’-biquinoline (1), 2,2’-dipyridylketone (2) and 4-((pyridine-2-ylmethylene)amino)phenol (3)}. In general, the intrinsic DNA-binding constants for the different compounds exhibited values within close proximity; the changes in the viscosity of the CT-DNA upon binding to the compounds suggest intercalation-binding mode. Molecular docking study predicted that complexes containing the highly planar ligand 2,2’-biquinoline are capable to establish π–π interactions with nucleobases of the DNA; the other four complexes engaged in donor–acceptor interactions with DNA nucleobases. The six complexes and two reference drugs (cisplatin and sunitinib) were tested against two cancer cell lines (COLO 205 and RCC-PR) and one normal cell line (LLC-MK2), highlighting the better performance of the zinc(II) complexes compared to their platinum(II) analogues. Moreover, zinc(II) complexes have higher selectivity index values than the reference drugs, with promising anticancer properties.
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Alsaedi S, Babgi BA, Abdellattif MH, Arshad MN, Emwas AHM, Jaremko M, Humphrey MG, Asiri AM, Hussien MA. DNA-Binding and Cytotoxicity of Copper(I) Complexes Containing Functionalized Dipyridylphenazine Ligands. Pharmaceutics 2021; 13:pharmaceutics13050764. [PMID: 34065613 PMCID: PMC8161420 DOI: 10.3390/pharmaceutics13050764] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 02/07/2023] Open
Abstract
A set of copper(I) coordination compounds with general formula [CuBr(PPh3)(dppz-R)] (dppz-R = dipyrido[3,2-a:2’,3’-c]phenazine (Cu-1), 11-nitrodipyrido[3,2-a:2’,3’-c]phenazine (Cu-2), 11-cyanodipyrido[3,2-a:2’,3’-c]phenazine (Cu-3), dipyrido[3,2-a:2’,3’-c]phenazine-11-phenone (Cu-4), 11,12-dimethyldipyrido[3,2-a:2’,3’-c]phenazine (Cu-5)) have been prepared and characterized by elemental analysis, 1H-NMR and 31P-NMR spectroscopies as well as mass spectrometry. The structure of Cu-1 was confirmed by X-ray crystallography. The effect of incorporating different functional groups on the dppz ligand on the binding into CT-DNA was evaluated by absorption spectroscopy, fluorescence quenching of EtBr-DNA adducts, and viscosity measurements. The functional groups affected the binding modes and hence the strength of binding affinities, as suggested by the changes in the relative viscosity. The differences in the quenching constants (Ksv) obtained from the fluorescence quenching assay highlight the importance of the functional groups in altering the binding sites on the DNA. The molecular docking data support the DNA-binding studies, with the sites and mode of interactions against B-DNA changing with the different functional groups. Evaluation of the anticancer activities of the five copper compounds against two different cancer cell lines (M-14 and MCF-7) indicated the importance of the functional groups on the dppz ligand on the anticancer activities. Among the five copper complexes, the cyano-containing complex (Cu-3) has the best anticancer activities.
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Affiliation(s)
- Sammar Alsaedi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (S.A.); (A.M.A.); (M.A.H.)
| | - Bandar A. Babgi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (S.A.); (A.M.A.); (M.A.H.)
- Correspondence: ; Tel.: +966-555563702
| | - Magda H. Abdellattif
- Chemistry Department, Deanship of Scientific Research, College of Sciences, Taif University, Al-Haweiah, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Muhammad N. Arshad
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;
| | - Abdul-Hamid M. Emwas
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia;
| | - Mariusz Jaremko
- Biological and Environmental Science and Engineering (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;
| | - Mark G. Humphrey
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia;
| | - Abdullah M. Asiri
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (S.A.); (A.M.A.); (M.A.H.)
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia;
| | - Mostafa A. Hussien
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; (S.A.); (A.M.A.); (M.A.H.)
- Department of Chemistry, Faculty of Science, Port Said University, Port Said 42521, Egypt
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15
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Gamov GA. Processing of the spectrofluorimetric data using the graphical methods and the maximum likelihood approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 249:119334. [PMID: 33360207 DOI: 10.1016/j.saa.2020.119334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/18/2020] [Accepted: 12/08/2020] [Indexed: 06/12/2023]
Abstract
The present work describes the calculation of the binding constants from spectrofluorimetric data using simple graphical methods and specialized software implementing the maximum likelihood approach. The following popular cases are analyzed: 1) protein-small molecule; 2) protein-metal complex; 3) DNA-small molecule; 4) DNA-metal complex interactions. The inability of graphical plots to return the correct results except for the simplest situation (single reaction with a non-fluorescent product) is demonstrated. The possibility of determining the most probable stoichiometric model using the maximum likelihood estimation (LSQ as its special case) is discussed as well as the limitations.
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Affiliation(s)
- G A Gamov
- Research Institute of Thermodynamics and Kinetics of Chemical Processes, Ivanovo State University of Chemistry and Technology, 153000 Ivanovo, Sheremetevskii pr. 7, Russia.
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