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Curcumin-Based β-Diketo Ligands for Ga3+: Thermodynamic Investigation of Potential Metal-Based Drugs. Pharmaceuticals (Basel) 2022; 15:ph15070854. [PMID: 35890151 PMCID: PMC9321647 DOI: 10.3390/ph15070854] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 02/06/2023] Open
Abstract
Curcumin is known for its therapeutic properties; among these, antioxidant, anti-inflammatory and anti-cancer ones stand out. Besides, curcumin metal complexes have shown widespread application in medicine and can be exploited as lead structures for developing metal-based drugs. Unfortunately, curcumin is poorly bioavailable, mainly due to its instability in physiological conditions; this weakness is tightly connected to the presence of the β-diketo moiety undergoing tautomeric equilibrium. Stability and metal-chelating ability can be tuned by modulating the electronic effects and steric hindrance close to the β-diketo moiety; in addition, formation of a metal complex shifts the tautomeric equilibrium towards the β-keto–enol form and increases stability in biological media. Among the metals used in clinical therapy, gallium nitrate has shown to have significant antitumor activity against non-Hodgkin lymphoma and bladder cancer, thus indicating that gallium-based drugs have potential for further development as antineoplastic agents with improved therapeutic activity. Curcuminoids have demonstrated high affinity for gallium(III), allowing the formation of stable positively charged M:L 1:2 β-diketonate complexes that benefit from the therapeutic activity of both the metal and the ligand. Seven new curcumin derivatives were synthesized and completely characterized. The new derivatives retain the solvent-dependent keto–enol tautomerism, with the prevalence of the diketo form in aqueous solution. Enhanced stability in simulated physiological conditions was observed in comparison to the lead compound curcumin. The presence of Ga3+ anticipates the dissociation of the enolic proton, allowing chelate complex formation, and simultaneously it shifts the tautomeric equilibrium towards the keto–enol form. A complete 1H/13C NMR and UV–Vis study was performed to define the metal-to-ligand stoichiometry ratio and the overall stability constants. In addition, we demonstrated that some of the derivatives have increased antiproliferative activity on colon cancer cells compared to curcumin and antioxidant properties. On the whole, the synthesized curcumin-based molecules may act as new gallium(III) chelators with improved stability with respect to curcumin and could open interesting perspectives for the development of novel therapeutic agents for cancer.
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Casiopeinas of Third Generations: Synthesis, Characterization, Cytotoxic Activity and Structure-Activity Relationships of Mixed Chelate Compounds with Bioactive Secondary Ligands. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27113504. [PMID: 35684441 PMCID: PMC9182210 DOI: 10.3390/molecules27113504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/21/2022] [Accepted: 05/27/2022] [Indexed: 12/14/2022]
Abstract
Casiopeinas are a family of copper(II) coordination compounds that have shown an important antineoplastic effect and low toxicity in normal cells. These compounds induce death cells by apoptosis through a catalytic redox process with endogenous reducing agents. Further studies included a structural variation, improving the activity and selectivity in cancer cells or other targets. In the present work we report the third generation, which contains a bioactive monocharged secondary ligand, as well as the design, synthesis, characterization and antiproliferative activity, of sixteen new copper(II) coordination compounds with curcumin or dimethoxycurcumin as secondary ligands. All compounds were characterized by elemental analysis, FTIR, UV-Vis, magnetic susceptibility, mass spectra with MALDI-flight time, cyclic voltammetry, electron paramagnetic resonance (EPR) spectroscopy and X-ray diffraction. Crystallization of two complexes was achieved in dimethylsulfoxide (DMSO) with polar solvent, and crystal data demonstrated that a square-based or square-base pyramid geometry are possible. A 1:1:1 stoichiometry (diimine: copper: curcuminoid) ratio and the possibility of a nitrate ion as a counterion were supported. 1H, 13C NMR spectra were used for the ligands. A sulforhodamine B assay was used to evaluate the cytotoxicity effect against two human cancer cell lines, SKLU-1 and HeLa. Electronic descriptors and redox potential were obtained by DFT calculations. Structure–activity relationships are strongly determined by the redox potential (E1/2) of copper(II) and molar volume (V) of the complexes. These compounds can be used as a template to open a wide field of research both experimentally and theoretically.
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Rigamonti L, Reginato F, Ferrari E, Pigani L, Gigli L, Demitri N, Kopel P, Tesarova B, Heger Z. From solid state to in vitro anticancer activity of copper(II) compounds with electronically-modulated NNO Schiff base ligands. Dalton Trans 2021; 49:14626-14639. [PMID: 33057512 DOI: 10.1039/d0dt03038d] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The copper(ii) complexes of general formula [Cu(GL)(Cl)] (1-3, G = OMe, H and NO2, respectively), bearing tridentate Schiff base ligands (GL-) and a chloride as a fourth labile one, are here reported. The Schiff bases derive from the monocondensation of ethylenediamine and substituted salicylaldehyde, where the electronic properties are modulated by the releasing or withdrawing power of the G group. The compounds were structurally characterized through single crystal Synchrotron X-ray diffraction experiments in the solid state, revealing that 1 (OMe) and 2 (H) adopt a dimeric assembly [Cu(μ-Cl)(GL)]2 through apical interaction of the chloride ions of two monomeric units, while 3 embraces a 1D polymeric chain structure [Cu(μ-Cl)(NO2L)]n with a similar bridging fashion, all supported by extended intramolecular or intrachain hydrogen bonds. The redox properties of the complexes were also studied by cyclic voltammetry with no marked effect of the substituent on the potential of the CuII/CuI redox system. UV/Vis spectroscopic studies in mimicked physiological conditions highlighted the intactness and stability of the coordinated NNO tridentate ligand in 1-3 and the lability of the coordinated chloride ion with the formation of the aquo-complexes [Cu(GL)(H2O)]+ in aqueous solution, as confirmed by conductance measurements with a 1 : 1 electrolyte molar conductivity. In vitro tests on cell viability were conducted on malignant cell lines typical for their poor prognosis and curability, revealing time-dependent and differential cytotoxicity given by the substituent G. All compounds were capable of formation of intracellular reactive oxygen species and DNA intercalation, acting as nuclease and producing double-strand DNA breaks. This is especially effective for 3 (NO2), which revealed the highest anticancer activity against malignant triple-negative breast cancer MDA-MB-231 cells, with a two-to-four-fold cytotoxicity enhancement with respect to 1 (OMe) and 2 (H), and, most important, substantial differentiation of cytotoxicity with respect to healthy endothelial HUVEC cell line.
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Affiliation(s)
- Luca Rigamonti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Francesco Reginato
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Erika Ferrari
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Laura Pigani
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Lara Gigli
- Elettra Synchrotron Trieste, Strada Statale 14 - km 163.5 - Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Nicola Demitri
- Elettra Synchrotron Trieste, Strada Statale 14 - km 163.5 - Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Pavel Kopel
- Department of Inorganic Chemistry, Faculty of Science, Palacky University, 17. listopadu 12, CZ-77146, Olomouc, Czech Republic
| | - Barbora Tesarova
- Department of Chemistry and Biochemistry, Mendel University, Zemedelska 1, CZ-61300, Brno, Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry, Mendel University, Zemedelska 1, CZ-61300, Brno, Czech Republic and Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, CZ-612-00 Brno, Czech Republic
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Tran QH, Le DV. A NEW SPECTROSCOPY METHOD FOR THE QUANTITATIVE DETERMINATION OF IRON(III) BASED ON CURCUMIN REAGENT. ACTA CHEMICA IASI 2021. [DOI: 10.47743/achi-2021-1-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Musib D, Pal M, Raza MK, Roy M. Photo-physical, theoretical and photo-cytotoxic evaluation of a new class of lanthanide(iii)–curcumin/diketone complexes for PDT application. Dalton Trans 2020; 49:10786-10798. [DOI: 10.1039/d0dt02082f] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Improved ISC in La(iii) complex of curcumin, on activation with visible light, has resulted in high yield of 1O2 in HeLa/MCF-7 cells, leading to the oxidative stress which was responsible for remarkable caspase 3/7-dependent apoptotic photocytotoxicity.
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Affiliation(s)
- Dulal Musib
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal
- India
| | - Mrityunjoy Pal
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal
- India
| | - Md Kausar Raza
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore-560012
- India
| | - Mithun Roy
- Department of Chemistry
- National Institute of Technology Manipur
- Imphal
- India
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Tran QH, Doan TT. A novel study on curcumin metal complexes: solubility improvement, bioactivity, and trial burn wound treatment in rats. NEW J CHEM 2020. [DOI: 10.1039/d0nj01159b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This paper describes a new technique to enhance the solubility of metal curcumin complexes.
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Affiliation(s)
- Quang Hieu Tran
- Division of Chemistry
- Basic Sciences Department
- Saigon Technology University
- Ho Chi Minh City 700000
- Vietnam
| | - Thanh Thao Doan
- Faculty of Food Technology
- Saigon Technology University
- Ho Chi Minh City 700000
- Vietnam
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Cingolani A, Zanotti V, Zacchini S, Massi M, Simpson PV, Maheshkumar Desai N, Casari I, Falasca M, Rigamonti L, Mazzoni R. Synthesis, reactivity and preliminary biological activity of iron(0) complexes with cyclopentadienone and amino-appendedN-heterocyclic carbene ligands. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4779] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Andrea Cingolani
- Dipartimento di Chimica Industriale “Toso Montanari”; Università degli Studi di Bologna; viale Risorgimento 4 40136 Bologna Italy
| | - Valerio Zanotti
- Dipartimento di Chimica Industriale “Toso Montanari”; Università degli Studi di Bologna; viale Risorgimento 4 40136 Bologna Italy
| | - Stefano Zacchini
- Dipartimento di Chimica Industriale “Toso Montanari”; Università degli Studi di Bologna; viale Risorgimento 4 40136 Bologna Italy
| | - Massimiliano Massi
- School of Molecular and Life Science - Curtin Institute for Functional Molecules and Interfaces; Curtin University; GPO Box U1987 Perth 6845 Western Australia Australia
| | - Peter V. Simpson
- School of Molecular and Life Science - Curtin Institute for Functional Molecules and Interfaces; Curtin University; GPO Box U1987 Perth 6845 Western Australia Australia
| | - Nima Maheshkumar Desai
- Metabolic Signalling Group, School of Pharmacy & Biomedical Sciences, Curtin Health Innovation Research Institute; Curtin University; Perth 6102 Western Australia Australia
| | - Ilaria Casari
- Metabolic Signalling Group, School of Pharmacy & Biomedical Sciences, Curtin Health Innovation Research Institute; Curtin University; Perth 6102 Western Australia Australia
| | - Marco Falasca
- Metabolic Signalling Group, School of Pharmacy & Biomedical Sciences, Curtin Health Innovation Research Institute; Curtin University; Perth 6102 Western Australia Australia
| | - Luca Rigamonti
- Dipartimento di Scienze Chimiche e Geologiche; Università degli Studi di Modena e Reggio Emilia; via G. Campi 103 41125 Modena Italy
| | - Rita Mazzoni
- Dipartimento di Chimica Industriale “Toso Montanari”; Università degli Studi di Bologna; viale Risorgimento 4 40136 Bologna Italy
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Roy B, Roy TS, Rahaman SA, Das K, Bandyopadhyay S. A Minimalist Approach for Distinguishing Individual Lanthanide Ions Using Multivariate Pattern Analysis. ACS Sens 2018; 3:2166-2174. [PMID: 30239190 DOI: 10.1021/acssensors.8b00767] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
To discriminate among the 14 trivalent lanthanide ions, curcumin, a naturally occurring, nontoxic, off-the-shelf, commercially available compound containing a single fluorophore, was chosen as a probe in the water media at pH 6.8 and pH 8.2. By measuring the emission and absorption spectra of the probe, under the different pH conditions, and by performing linear discriminant analysis on the data, 14 Ln3+ ions were discriminated. Additionally, an easy tool for the nonspecialists was developed with easily available household substances, using a smartphone app, which added an extra advantage to this single probe. This probe possesses advantageous features in terms of low-cost and instant on-site detection of the lanthanide ions.
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Affiliation(s)
- Biswajit Roy
- Department of Chemical Sciences and ‡Department of Mathematical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia 741246, India
| | | | - Sk. Atiur Rahaman
- Department of Chemical Sciences and ‡Department of Mathematical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia 741246, India
| | | | - Subhajit Bandyopadhyay
- Department of Chemical Sciences and ‡Department of Mathematical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia 741246, India
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Orteca G, Tavanti F, Bednarikova Z, Gazova Z, Rigillo G, Imbriano C, Basile V, Asti M, Rigamonti L, Saladini M, Ferrari E, Menziani MC. Curcumin derivatives and Aβ-fibrillar aggregates: An interactions' study for diagnostic/therapeutic purposes in neurodegenerative diseases. Bioorg Med Chem 2018; 26:4288-4300. [PMID: 30031653 DOI: 10.1016/j.bmc.2018.07.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/10/2018] [Accepted: 07/14/2018] [Indexed: 01/01/2023]
Abstract
Several neurodegenerative diseases, like Alzheimer's (AD), are characterized by amyloid fibrillar deposition of misfolded proteins, and this feature can be exploited for both diagnosis and therapy design. In this paper, structural modifications of curcumin scaffold were examined in order to improve its bioavailability and stability in physiological conditions, as well as its ability to interfere with β-amyloid fibrils and aggregates. The acid-base behaviour of curcumin derivatives, their pharmacokinetic stability in physiological conditions, and in vitro ability to interfere with Aβ fibrils at different incubation time were investigated. The mechanisms governing these phenomena have been studied at atomic level by means of molecular docking and dynamic simulations. Finally, biological activity of selected curcuminoids has been investigated in vitro to evaluate their safety and efficiency in oxidative stress protection on hippocampal HT-22 mouse cells. Two aromatic rings, π-conjugated structure and H-donor/acceptor substituents on the aromatic rings showed to be the sine qua non structural features to provide interaction and disaggregation activity even at very low incubation time (2h). Computational simulations proved that upon binding the ligands modify the conformational dynamics and/or interact with the amyloidogenic region of the protofibril facilitating disaggregation. Significantly, in vitro results on hippocampal cells pointed out protection against glutamate toxicity and safety when administered at low concentrations (1 μM). On the overall, in view of its higher stability in physiological conditions with respect to curcumin, of his rapid binding to fibrillar aggregates and strong depolymerizing activity, phtalimmide derivative K2F21 appeared a good candidate for both AD diagnostic and therapeutic purposes.
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Affiliation(s)
- Giulia Orteca
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
| | - Francesco Tavanti
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
| | - Zuzana Bednarikova
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia
| | - Zuzana Gazova
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia
| | - Giovanna Rigillo
- Department of Life Sciences, University of Modena and Reggio Emilia, via G. Campi 213/D, 41125 Modena, Italy
| | - Carol Imbriano
- Department of Life Sciences, University of Modena and Reggio Emilia, via G. Campi 213/D, 41125 Modena, Italy
| | - Valentina Basile
- Department of Life Sciences, University of Modena and Reggio Emilia, via G. Campi 213/D, 41125 Modena, Italy
| | - Mattia Asti
- Nuclear Medicine Unit, Advanced Technology Department, AUSL - IRCCS Reggio Emilia, viale Amendola 2, 42122 Reggio Emilia, Italy
| | - Luca Rigamonti
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
| | - Monica Saladini
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
| | - Erika Ferrari
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Maria Cristina Menziani
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, 41125 Modena, Italy
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