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Krajewska JB, Włodarczyk J, Jacenik D, Kordek R, Taciak P, Szczepaniak R, Fichna J. New Class of Anti-Inflammatory Therapeutics Based on Gold (III) Complexes in Intestinal Inflammation-Proof of Concept Based on In Vitro and In Vivo Studies. Int J Mol Sci 2021; 22:ijms22063121. [PMID: 33803793 PMCID: PMC8003307 DOI: 10.3390/ijms22063121] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/13/2021] [Accepted: 03/15/2021] [Indexed: 02/06/2023] Open
Abstract
Inflammatory bowel diseases (IBD) are at the top of the worldwide rankings for gastrointestinal diseases as regards occurrence, yet efficient and side-effect-free treatments are currently unavailable. In the current study, we proposed a new concept for anti-inflammatory treatment based on gold (III) complexes. A new gold (III) complex TGS 121 was designed and screened in the in vitro studies using a mouse macrophage cell line, RAW264.7, and in vivo, in the dextran sulphate sodium (DSS)-induced mouse model of colitis. Physicochemical studies showed that TGS 121 was highly water-soluble; it was stable in water, blood, and lymph, and impervious to sunlight. In lipopolysaccharide (LPS)-stimulated RAW264.7 cells, the complex showed a potent anti-inflammatory profile, as evidenced in neutral red uptake and Griess tests. In the DSS-induced mouse model of colitis, the complex administered in two doses (1.68 μg/kg, intragastrically, and 16.8 μg/kg, intragastrically, once daily) produced a significant (* p < 0.05) anti-inflammatory effect, as shown by macroscopic score. The mechanism of action of TGS 121 was related to the enzymatic and non-enzymatic antioxidant system; moreover, TGS 121 induced changes in the tight junction complexes expression in the intestinal wall. This is the first study proving that gold (III) complexes may have therapeutic potential in the treatment of IBD.
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Affiliation(s)
- Julia B. Krajewska
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, 92-215 Lodz, Poland; (J.B.K.); (J.W.)
| | - Jakub Włodarczyk
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, 92-215 Lodz, Poland; (J.B.K.); (J.W.)
| | - Damian Jacenik
- Department of Cytobiochemistry, University of Lodz, 90-236 Lodz, Poland;
| | - Radzisław Kordek
- Department of Pathology, Faculty of Medicine, 92-213 Lodz, Poland;
| | - Przemysław Taciak
- Department of Pharmacodynamics, Faculty of Pharmacy, Medical University of Warsaw, 02-097 Warsaw, Poland;
| | | | - Jakub Fichna
- Department of Biochemistry, Faculty of Medicine, Medical University of Lodz, 92-215 Lodz, Poland; (J.B.K.); (J.W.)
- Correspondence:
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Tunes LG, Morato RE, Garcia A, Schmitz V, Steindel M, Corrêa-Junior JD, Dos Santos HF, Frézard F, de Almeida MV, Silva H, Moretti NS, de Barros ALB, do Monte-Neto RL. Preclinical Gold Complexes as Oral Drug Candidates to Treat Leishmaniasis Are Potent Trypanothione Reductase Inhibitors. ACS Infect Dis 2020; 6:1121-1139. [PMID: 32283915 DOI: 10.1021/acsinfecdis.9b00505] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The drugs currently used to treat leishmaniases have limitations concerning cost, efficacy, and safety, making the search for new therapeutic approaches urgent. We found that the gold(I)-derived complexes were active against L. infantum and L. braziliensis intracellular amastigotes with IC50 values ranging from 0.5 to 5.5 μM. All gold(I) complexes were potent inhibitors of trypanothione reductase (TR), with enzyme IC50 values ranging from 1 to 7.8 μM. Triethylphosphine-derived complexes enhanced reactive oxygen species (ROS) production and decreased mitochondrial respiration after 2 h of exposure, indicating that gold(I) complexes cause oxidative stress by direct ROS production, by causing mitochondrial damage or by impairing TR activity and thus accumulating ROS. There was no cross-resistance to antimony; in fact, SbR (antimony-resistant mutants) strains were hypersensitive to some of the complexes. BALB/c mice infected with luciferase-expressing L. braziliensis or L. amazonensis and treated orally with 12.5 mg/kg/day of AdT Et (3) or AdO Et (4) presented reduced lesion size and parasite burden, as revealed by bioimaging. The combination of (3) and miltefosine allowed for a 50% reduction in miltefosine treatment time. Complexes 3 and 4 presented favorable pharmacokinetic and toxicity profiles that encourage further drug development studies. Gold(I) complexes are promising antileishmanial agents, with a potential for therapeutic use, including in leishmaniasis caused by antimony-resistant parasites.
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Affiliation(s)
- Luiza G. Tunes
- Instituto René Rachou/Fiocruz Minas−Fundação Oswaldo Cruz, Belo Horizonte 30190-009, Brasil
| | - Roberta E. Morato
- Instituto René Rachou/Fiocruz Minas−Fundação Oswaldo Cruz, Belo Horizonte 30190-009, Brasil
| | - Adriana Garcia
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Vinicius Schmitz
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Mario Steindel
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Florianópolis 88040-900, Brasil
| | - José D. Corrêa-Junior
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
| | - Hélio F. Dos Santos
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Frédéric Frézard
- Departamento de Fisiologia e Biofísica, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
| | - Mauro V. de Almeida
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Juiz de Fora, Juiz de Fora 36036-900, Brasil
| | - Heveline Silva
- Departamento de Química, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
| | - Nilmar S. Moretti
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo, São Paulo 04023-062, Brasil
| | - André L. B. de Barros
- Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brasil
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Trommenschlager A, Chotard F, Bertrand B, Amor S, Richard P, Bettaïeb A, Paul C, Connat JL, Le Gendre P, Bodio E. Gold(I)-Coumarin-Caffeine-Based Complexes as New Potential Anti-Inflammatory and Anticancer Trackable Agents. ChemMedChem 2018; 13:2408-2414. [PMID: 30203922 DOI: 10.1002/cmdc.201800474] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 11/11/2022]
Abstract
Three new gold(I)-coumarin-based trackable therapeutic complexes and two non-trackable analogues have been synthesised and fully characterised. They all display anti-proliferative properties on several types of cancer cell lines, including those of colon, breast, and prostate. Two complexes displayed significant anti-inflammatory effects; one displayed pro-inflammatory behaviour; this highlights the impact of the position of the fluorophore on the caffeine scaffold. Additionally, the three coumarin derivatives could be visualised in vitro by two-photon microscopy.
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Affiliation(s)
| | - Florian Chotard
- ICMUB UMR6302, CNRS, Université de Bourgogne Franche-Comté, 21000, Dijon, France
| | - Benoît Bertrand
- ICMUB UMR6302, CNRS, Université de Bourgogne Franche-Comté, 21000, Dijon, France
| | - Souheila Amor
- ICMUB UMR6302, CNRS, Université de Bourgogne Franche-Comté, 21000, Dijon, France
| | - Philippe Richard
- ICMUB UMR6302, CNRS, Université de Bourgogne Franche-Comté, 21000, Dijon, France
| | - Ali Bettaïeb
- EPHE, PSL Research University, 75000, Paris, France.,LIIC, EA7269, Université de Bourgogne Franche Comté, 21000, Dijon, France
| | - Catherine Paul
- EPHE, PSL Research University, 75000, Paris, France.,LIIC, EA7269, Université de Bourgogne Franche Comté, 21000, Dijon, France
| | - Jean-Louis Connat
- Biologie Animale Cellulaire et Moléculaire, Université de Bourgogne Franche-Comté, 6 Bvd. Gabriel, 21000, Dijon, France
| | - Pierre Le Gendre
- ICMUB UMR6302, CNRS, Université de Bourgogne Franche-Comté, 21000, Dijon, France
| | - Ewen Bodio
- ICMUB UMR6302, CNRS, Université de Bourgogne Franche-Comté, 21000, Dijon, France
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Trommenschlager A, Chotard F, Bertrand B, Amor S, Dondaine L, Picquet M, Richard P, Bettaïeb A, Le Gendre P, Paul C, Goze C, Bodio E. Gold(i)-BODIPY-imidazole bimetallic complexes as new potential anti-inflammatory and anticancer trackable agents. Dalton Trans 2018; 46:8051-8056. [PMID: 28594007 DOI: 10.1039/c7dt01377a] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new gold(i)-BODIPY-imidazole based trackable therapeutic bimetallic complexes have been synthesized and fully characterized. They display strong antiproliferative properties on several types of cancers including colon, breast, and prostate and one of them presents a significant anti-inflammatory effect. Additionally, the two compounds could be visualised in vitro by confocal microscopy in the submicromolar range.
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Warżajtis B, Glišić BĐ, Savić ND, Pavic A, Vojnovic S, Veselinović A, Nikodinovic-Runic J, Rychlewska U, Djuran MI. Mononuclear gold(iii) complexes with l-histidine-containing dipeptides: tuning the structural and biological properties by variation of the N-terminal amino acid and counter anion. Dalton Trans 2018; 46:2594-2608. [PMID: 28155927 DOI: 10.1039/c6dt04862e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Gold(iii) complexes with different l-histidine-containing dipeptides, [Au(Gly-l-His-NA,NP,N3)Cl]Cl·3H2O (1a), [Au(Gly-l-His-NA,NP,N3)Cl]NO3·1.25H2O (1b), [Au(l-Ala-l-His-NA,NP,N3)Cl][AuCl4]·H2O (2a), [Au(l-Ala-l-His-NA,NP,N3)Cl]NO3·2.5H2O (2b), [Au(l-Val-l-His-NA,NP,N3)Cl]Cl·2H2O (3), [Au(l-Leu-l-His-NA,NP,N3)Cl]Cl (4a) and [Au(l-Leu-l-His-NA,NP,N3)Cl][AuCl4]·H2O (4b), have been synthesized and structurally characterized by spectroscopic (1H NMR, IR and UV-vis) and single-crystal X-ray diffraction techniques. The antimicrobial efficiency of these gold(iii) complexes, along with K[AuCl4] and the corresponding dipeptides, was evaluated against the broad panel of Gram-positive and Gram-negative bacteria and fungi, displaying their moderate inhibiting activity. Moreover, the cytotoxic properties of the investigated complexes were assessed against the normal human lung fibroblast cell line (MRC5) and two human cancer, cervix (HeLa) and lung (A549) cell lines. None of the complexes exerted significant cytotoxic activity; nevertheless complexes that did show selectivity in terms of cancer vs. normal cell lines (2a/b and 4a/b) have been evaluated using zebrafish (Danio rerio) embryos for toxicity and antiangiogenic potential. Although the gold(iii) complexes achieved an antiangiogenic effect comparable to the known angiogenic inhibitors auranofin and sunitinib malate at 30-fold higher concentrations, they had no cardiovascular side effects, which commonly accompany auranofin and sunitinib malate treatment. Finally, binding of the gold(iii) complexes to the active sites of both human and bacterial (Escherichia coli) thioredoxin reductases (TrxRs) was demonstrated by conducting a molecular docking study, suggesting that the mechanism of biological action of these complexes can be associated with their interaction with the TrxR active site.
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Affiliation(s)
- Beata Warżajtis
- Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89B, 61-614 Poznań, Poland.
| | - Biljana Đ Glišić
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia.
| | - Nada D Savić
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia.
| | - Aleksandar Pavic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia.
| | - Sandra Vojnovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia.
| | | | - Jasmina Nikodinovic-Runic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia.
| | - Urszula Rychlewska
- Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89B, 61-614 Poznań, Poland.
| | - Miloš I Djuran
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia.
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7
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Shpakovsky DB, Shtil AA, Kharitonashvili EV, Tyurin VY, Antonenko TA, Nazarov AA, Osipova VP, Berberova NT, Foteeva LS, Schmidt C, Ott I, Milaeva ER. The antioxidant 2,6-di-tert-butylphenol moiety attenuates the pro-oxidant properties of the auranofin analogue. Metallomics 2018; 10:406-413. [PMID: 29399682 DOI: 10.1039/c7mt00286f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal-based drugs are gaining momentum as a rapidly developing area of medicinal inorganic chemistry. Among gold pharmaceuticals, auranofin is a well known antirheumatic drug. The efficacy of gold-organic complexes largely depends on their pro-oxidant properties since auranofin targets the redox enzyme thioredoxin reductase (TrxR). However, an uncontrollable oxygen burst may be harmful for healthy cells; therefore, the search for chemical modifications to attenuate oxidation-related general toxicity of gold containing anti-inflammatory drugs is justified. In this study, we demonstrate that the incorporation of a specific antioxidant phenol fragment can counterbalance the pro-oxidative potential of the Au containing complex molecule. The electrochemical studies of AuPPh3SR (1, R= 3,5-di-tert-butyl-4-hydroxyphenyl) and its precursors AuPPh3Cl (2) and RSH (3) showed that complex 1 and phenol 3 efficiently scavenged the radicals (as detected by cyclic voltammetry) whereas 2 had no effect. Compound 1 inhibited TrxR in vitro with IC50 0.57 ± 0.15 μM, a value one order of magnitude bigger than the potency reported for auranofin. Compound 1 (5 mg kg-1 daily gavage for 14 days) caused a decrease in ex vivo spontaneous and ascorbate-induced lipid peroxidation in the homogenates of rat lung, heart muscle, spleen, liver, kidneys, testicles and brain as assessed by the thiobarbituric acid reactive substances. Importantly, in animals fed with 1, no discernible general toxicity was registered suggesting that this compound is well tolerated. Our results provide evidence for an efficient synthetic route to obtain gold containing anti-inflammatory drug candidates with balanced pro/anti-oxidative properties.
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Affiliation(s)
- D B Shpakovsky
- Lomonosov Moscow State University, Department of Medicinal Chemistry & Fine Organic Synthesis, Moscow, Russia.
| | - A A Shtil
- Lomonosov Moscow State University, Department of Medicinal Chemistry & Fine Organic Synthesis, Moscow, Russia. and Blokhin National Medical Research Center of Oncology, Moscow, Russia
| | - E V Kharitonashvili
- Lomonosov Moscow State University, Department of Medicinal Chemistry & Fine Organic Synthesis, Moscow, Russia.
| | - V Yu Tyurin
- Lomonosov Moscow State University, Department of Medicinal Chemistry & Fine Organic Synthesis, Moscow, Russia.
| | - T A Antonenko
- Lomonosov Moscow State University, Department of Medicinal Chemistry & Fine Organic Synthesis, Moscow, Russia.
| | - A A Nazarov
- Lomonosov Moscow State University, Department of Medicinal Chemistry & Fine Organic Synthesis, Moscow, Russia.
| | - V P Osipova
- Astrakhan State Technical University, Astrakhan, Russia
| | - N T Berberova
- Astrakhan State Technical University, Astrakhan, Russia
| | - L S Foteeva
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Moscow, Russia
| | - C Schmidt
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - I Ott
- Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Braunschweig, Germany
| | - E R Milaeva
- Lomonosov Moscow State University, Department of Medicinal Chemistry & Fine Organic Synthesis, Moscow, Russia.
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Water-soluble gold(III) complexes with N-donor ligands as potential immunomodulatory and antibiofilm agents. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.11.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Mohapatra B, Pratibha, Verma S. Directed adenine functionalization for creating complex architectures for material and biological applications. Chem Commun (Camb) 2017; 53:4748-4758. [PMID: 28393940 DOI: 10.1039/c7cc00222j] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In this feature article, targeted design strategies are outlined for modified adenine nucleobase derivatives in order to construct metal-mediated discrete complexes, ring-expanded purine skeletons, linear and catenated coordination polymers, shape-selective MOFs, and purine-capped nanoparticles, with a wide range of applications from gas and solvent adsorption to bioimaging agents and anticancer metallodrugs. The success of such design strategies could be ascribed to the rich chemistry of purine and pyrimidine derivatives, versatile coordination behavior, ability to bind a host of metal ions, which could be further tuned by the introduction of additional functionalities, and their inherent propensity to hydrogen bond and exhibit π-π interactions. These noncovalent interactions produce stable frameworks and network solids that are useful as advanced materials, and the biocompatibility of these ligand complexes provides an impetus for assessing novel biological applications.
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Affiliation(s)
- Balaram Mohapatra
- Department of Chemistry Indian Institute of Technology Kanpur, Kanpur, India.
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10
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Abstract
Inflammasomes are high molecular weight complexes that sense and react to injury and infection. Their activation induces caspase-1 activation and release of interleukin-1β, a pro-inflammatory cytokine involved in both acute and chronic inflammatory responses. There is increasing evidence that inflammasomes, particularly the NLRP3 inflammasome, act as guardians against noninfectious material. Inappropriate activation of the NLRP3 inflammasome contributes to the progression of many noncommunicable diseases such as gout, type II diabetes, and Alzheimer's disease. Inhibiting the inflammasome may significantly reduce damaging inflammation and is therefore regarded as a therapeutic target. Currently approved inhibitors of interleukin-1β are rilonacept, canakinumab, and anakinra. However, these proteins do not possess ideal pharmacokinetic properties and are unlikely to easily cross the blood-brain barrier. Because inflammation can contribute to neurological disorders, this review focuses on the development of small-molecule inhibitors of the NLRP3 inflammasome.
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Affiliation(s)
- Alex G Baldwin
- Manchester Pharmacy School, Faculty of Medical and Human Sciences, The University of Manchester , Stopford Building, Oxford Road, Manchester M13 9PT, U.K
| | - David Brough
- Faculty of Life Sciences, The University of Manchester , AV Hill Building, Oxford Road, Manchester M13 9PT, U.K
| | - Sally Freeman
- Manchester Pharmacy School, Faculty of Medical and Human Sciences, The University of Manchester , Stopford Building, Oxford Road, Manchester M13 9PT, U.K
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Gold(I)-triphenylphosphine complexes with hypoxanthine-derived ligands: in vitro evaluations of anticancer and anti-inflammatory activities. PLoS One 2014; 9:e107373. [PMID: 25226034 PMCID: PMC4167326 DOI: 10.1371/journal.pone.0107373] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 08/11/2014] [Indexed: 01/19/2023] Open
Abstract
A series of gold(I) complexes involving triphenylphosphine (PPh3) and one N-donor ligand derived from deprotonated mono- or disubstituted hypoxanthine (HLn) of the general composition [Au(Ln)(PPh3)] (1–9) is reported. The complexes were thoroughly characterized, including multinuclear high resolution NMR spectroscopy as well as single crystal X-ray analysis (for complexes 1 and 3). The complexes were screened for their invitro cytotoxicity against human cancer cell lines MCF7 (breast carcinoma), HOS (osteosarcoma) and THP-1 (monocytic leukaemia), which identified the complexes 4–6 as the most promising representatives, who antiproliferative activity was further tested against A549 (lung adenocarcinoma), G-361 (melanoma), HeLa (cervical cancer), A2780 (ovarian carcinoma), A2780R (ovarian carcinoma resistant to cisplatin), 22Rv1 (prostate cancer) cell lines. Complexes 4–6 showed a significantly higher invitro anticancer effect against the employed cancer cells, except for G-361, as compared with the commercially used anticancer drug cisplatin, with IC50 ≈ 1–30 µM. Anti-inflammatory activity was evaluated invitro by the assessment of the ability of the complexes to modulate secretion of the pro-inflammatory cytokines, i.e. tumour necrosis factor-α (TNF-α) and interleukin-1β (IL-1β), in the lipopolysaccharide-activated macrophage-like THP-1 cell model. The results of this study identified the complexes as auspicious anti-inflammatory agents with similar or better activity as compared with the clinically applied gold-based antiarthritic drug Auranofin. In an effort to explore the possible mechanisms responsible for the biological effect, the products of interactions of selected complexes with sulfur-containing biomolecules (L-cysteine and reduced glutathione) were studied by means of the mass-spectrometry study.
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Vasimalai N, Rajalakshmi K, John SA. Economically viable sensitive and selective luminescent sensor for the determination of Au(iii) in environmental samples. RSC Adv 2014. [DOI: 10.1039/c4ra05217j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An economically viable luminescent sensor for Au(iii) (detection limit of 1.0 pg L−1) was described in this paper using the 2,5-dimercapto-1,3,4-thiadiazole (DMT) fluorophore.
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Affiliation(s)
- N. Vasimalai
- Centre for Nanoscience and Nanotechnology
- Department of Chemistry
- Gandhigram Rural Institute
- Dindigul, India
| | - K. Rajalakshmi
- Centre for Nanoscience and Nanotechnology
- Department of Chemistry
- Gandhigram Rural Institute
- Dindigul, India
| | - S. Abraham John
- Centre for Nanoscience and Nanotechnology
- Department of Chemistry
- Gandhigram Rural Institute
- Dindigul, India
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