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Ratia C, Ballén V, Gabasa Y, Soengas RG, Velasco-de Andrés M, Iglesias MJ, Cheng Q, Lozano F, Arnér ESJ, López-Ortiz F, Soto SM. Novel gold(III)-dithiocarbamate complex targeting bacterial thioredoxin reductase: antimicrobial activity, synergy, toxicity, and mechanistic insights. Front Microbiol 2023; 14:1198473. [PMID: 37333656 PMCID: PMC10272563 DOI: 10.3389/fmicb.2023.1198473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 05/15/2023] [Indexed: 06/20/2023] Open
Abstract
Introduction Antimicrobial resistance is a pressing global concern that has led to the search for new antibacterial agents with novel targets or non-traditional approaches. Recently, organogold compounds have emerged as a promising class of antibacterial agents. In this study, we present and characterize a (C^S)-cyclometallated Au(III) dithiocarbamate complex as a potential drug candidate. Methods and results The Au(III) complex was found to be stable in the presence of effective biological reductants, and showed potent antibacterial and antibiofilm activity against a wide range of multidrug-resistant strains, particularly gram-positive strains, and gram-negative strains when used in combination with a permeabilizing antibiotic. No resistant mutants were detected after exposing bacterial cultures to strong selective pressure, indicating that the complex may have a low propensity for resistance development. Mechanistic studies indicate that the Au(III) complex exerts its antibacterial activity through a multimodal mechanism of action. Ultrastructural membrane damage and rapid bacterial uptake suggest direct interactions with the bacterial membrane, while transcriptomic analysis identified altered pathways related to energy metabolism and membrane stability including enzymes of the TCA cycle and fatty acid biosynthesis. Enzymatic studies further revealed a strong reversible inhibition of the bacterial thioredoxin reductase. Importantly, the Au(III) complex demonstrated low cytotoxicity at therapeutic concentrations in mammalian cell lines, and showed no acute in vivo toxicity in mice at the doses tested, with no signs of organ toxicity. Discussion Overall, these findings highlight the potential of the Au(III)-dithiocarbamate scaffold as a basis for developing novel antimicrobial agents, given its potent antibacterial activity, synergy, redox stability, inability to produce resistant mutants, low toxicity to mammalian cells both in vitro and in vivo, and non-conventional mechanism of action.
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Affiliation(s)
- Carlos Ratia
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
| | - Victoria Ballén
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
| | - Yaiza Gabasa
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
| | - Raquel G. Soengas
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | | | - María José Iglesias
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Qing Cheng
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Francisco Lozano
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
- Servei d’Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clínic de Barcelona, Barcelona, Spain
- Department de Biomedicina, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain
| | - Elias S. J. Arnér
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
- Department of Selenoprotein Research and the National Tumor Biology Laboratory, Budapest, Hungary
| | - Fernando López-Ortiz
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Sara M. Soto
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
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2
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Abstract
The gold drugs, gold sodium thiomalate (Myocrisin), aurothioglucose (Solganal), and the orally administered auranofin (Ridaura), are utilized in modern medicine for the treatment of inflammatory arthritis including rheumatoid and juvenile arthritis; however, new gold agents have been slow to enter the clinic. Repurposing of auranofin in different disease indications such as cancer, parasitic, and microbial infections in the clinic has provided impetus for the development of new gold complexes for biomedical applications based on unique mechanistic insights differentiated from auranofin. Various chemical methods for the preparation of physiologically stable gold complexes and associated mechanisms have been explored in biomedicine such as therapeutics or chemical probes. In this Review, we discuss the chemistry of next generation gold drugs, which encompasses oxidation states, geometry, ligands, coordination, and organometallic compounds for infectious diseases, cancer, inflammation, and as tools for chemical biology via gold-protein interactions. We will focus on the development of gold agents in biomedicine within the past decade. The Review provides readers with an accessible overview of the utility, development, and mechanism of action of gold-based small molecules to establish context and basis for the thriving resurgence of gold in medicine.
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Affiliation(s)
- R Tyler Mertens
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Sailajah Gukathasan
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Adedamola S Arojojoye
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Chibuzor Olelewe
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Samuel G Awuah
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- University of Kentucky Markey Cancer Center, Lexington, Kentucky 40536, United States
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3
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Zhang Q, Wang M, Hu X, Yan A, Ho PL, Li H, Sun H. Gold drugs as colistin adjuvants in the fight against MCR-1 producing bacteria. J Biol Inorg Chem 2023; 28:225-234. [PMID: 36662362 DOI: 10.1007/s00775-022-01983-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/22/2022] [Indexed: 01/21/2023]
Abstract
The emergence and rapid spread of the mobile colistin resistance gene mcr-1 among bacterial species and hosts significantly challenge the efficacy of "last-line" antibiotic colistin. Previously, we reported silver nitrate and auranofin serve as colistin adjuvants for combating mcr-1-positive bacteria. Herein, we uncovered more gold-based drugs and nanoparticles, and found that they exhibited varying degree of synergisms with colistin on killing mcr-1-positive bacteria. However, pre-activation of the drugs by either glutathione or N-acetyl cysteine, thus releasing and accumulating gold ions, is perquisite for their abilities to substitute zinc cofactor from MCR-1 enzyme. X-ray crystallography and biophysical studies further supported the proposed mechanism. This study not only provides basis for combining gold-based drugs and colistin for combating mcr-1-positive bacterial infections, but also undoubtedly opens a new horizon for metabolism details of gold-based drugs in overcoming antimicrobial resistance.
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Affiliation(s)
- Qi Zhang
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Minji Wang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Xuqiao Hu
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Aixin Yan
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Pak-Leung Ho
- Carol Yu Centre for Infection, The University of Hong Kong, Sassoon Road, Hong Kong SAR, China.,Department of Microbiology, The University of Hong Kong, Sassoon Road, Hong Kong SAR, China
| | - Hongyan Li
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
| | - Hongzhe Sun
- Department of Chemistry and CAS-HKU Joint Laboratory of Metallomics On Health and Environment, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.
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4
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Sousa A, Santos JF, Silva F, Sousa SA, Leitão JH, Matos AP, Pinheiro T, Silva RAL, Belo D, Almeida M, Marques F, Fernandes C. Antitumoral and Antimicrobial Activities of Block Copolymer Micelles Containing Gold Bisdithiolate Complexes. Pharmaceutics 2023; 15. [PMID: 36839886 DOI: 10.3390/pharmaceutics15020564] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/01/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
Gold(III) bisdithiolate complexes have been reported as potential antimicrobial and antitumoral agents. The complex [Au(cdc)2]- (cdc=cyanodithioimido carbonate) displayed antimicrobial and outstanding antitumor activity against the ovarian cancer cells A2780 and A2780cisR, which are sensitive and resistant to cisplatin, respectively. However, poor water solubility may hamper its clinical use. Block copolymer micelles (BCMs) may solubilize hydrophobic drugs, improving their bioavailability and circulation time in blood. Aiming to provide water solubility, prolonged availability, and enhanced therapeutic indexes, BCMs loaded with [Au(cdc)2]- were synthesized and characterized. The BCM-[Au(cdc)2] micelles were prepared with a loading efficiency of 64.6% and a loading content of 35.3 mg [Au(cdc)2]-/gBCM. A hydrodynamic diameter of 77.31 ± 27.00 nm and a low polydispersity index of 0.18 indicated that the micelles were homogenous and good candidates for drug delivery. Cytotoxic activity studies against A2780/A2780cisR cells showed that BCM-[Au(cdc)2] maintained relevant cytotoxic activity comparable to the cytotoxicity observed for the same concentration of gold complexes. The Au uptake in A2780 cells, determined by PIXE, was ca. 17% higher for BCMs-[Au(cdc)2] compared to [Au(cdc)2]-. The BCMs-[Au(cdc)2] presented antimicrobial activity against S. aureus Newman and C. glabrata CBS138. These results evidenced the potential of BCM-[Au(cdc)2] for drug delivery and its promising anticancer and antimicrobial activities.
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5
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Aragoni MC, Podda E, Caria V, Carta SA, Cherchi MF, Lippolis V, Murgia S, Orrù G, Pippia G, Scano A, Slawin AMZ, Woollins JD, Pintus A, Arca M. [Au III(N^N)Br 2](PF 6): A Class of Antibacterial and Antibiofilm Complexes (N^N = 2,2'-Bipyridine and 1,10-Phenanthroline Derivatives). Inorg Chem 2023; 62:2924-2933. [PMID: 36728360 PMCID: PMC9930124 DOI: 10.1021/acs.inorgchem.2c04410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A series of new complexes of general formula [AuIII(N^N)Br2](PF6) (N^N = 2,2'-bipyridine and 1,10-phenanthroline derivatives) were prepared and characterized by spectroscopic, electrochemical, and diffractometric techniques and tested against Gram-positive and Gram-negative bacterial strains (Staphylococcus aureus, Streptococcus intermedius, Pseudomonas aeruginosa, and Escherichia coli), showing promising antibacterial and antibiofilm properties.
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Affiliation(s)
- M. Carla Aragoni
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - Enrico Podda
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy,Centro
Servizi di Ateneo per la Ricerca (CeSAR), Università degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - Veronica Caria
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - Silvia A. Carta
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - M. Francesca Cherchi
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - Vito Lippolis
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - Simone Murgia
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - Germano Orrù
- Dipartimento
di Scienze Chirurgiche, University of Cagliari, Cagliari09042, Italy
| | - Gabriele Pippia
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy
| | - Alessandra Scano
- Dipartimento
di Scienze Chirurgiche, University of Cagliari, Cagliari09042, Italy
| | - Alexandra M. Z. Slawin
- EaStCHEM
School of Chemistry, University of St. Andrews, North Haugh, Fife, St. AndrewsKY16 9ST, U.K.
| | - J. Derek Woollins
- EaStCHEM
School of Chemistry, University of St. Andrews, North Haugh, Fife, St. AndrewsKY16 9ST, U.K.,Department
of Chemistry, Khalifa University, Abu Dhabi127788, United Arab Emirates
| | - Anna Pintus
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy,
| | - Massimiliano Arca
- Dipartimento
di Scienze Chimiche e Geologiche, Università
degli Studi di Cagliari, S. S. 554 bivio per Sestu, Monserrato Cagliari09042, Italy,
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6
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Abstract
Antimicrobial resistance is considered one of the three most important health problems by the World Health Organization. The emergence and spread of an increasing number of antimicrobial-resistant microorganisms make this a worldwide problem. Antibiotic-resistant bacteria are estimated to be the cause of 33,000 deaths in Europe and 700,000 worldwide each year. It is estimated that in 2050 bacterial infections will cause 10 million deaths across the globe. This problem is concomitant with a decrease in the investment and, therefore, the discovery and marketing of new antibiotics. Recently, there have been tremendous efforts to find new effective antimicrobial agents. Gold complexes, with their broad-spectrum antimicrobial activities and unique modes of action, are particularly relevant among several families of derivatives that have been investigated. This mini review revises the role of gold-derived molecules as antibacterial agents.
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Affiliation(s)
- Carlos Ratia
- ISGlobal, Hospital Clínic—Universitat de Barcelona, Barcelona, Spain
| | - Raquel G. Soengas
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, Oviedo, Spain
| | - Sara M. Soto
- ISGlobal, Hospital Clínic—Universitat de Barcelona, Barcelona, Spain
- *Correspondence: Sara M. Soto,
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7
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Ratia C, Cepas V, Soengas R, Navarro Y, Velasco-de Andrés M, Iglesias MJ, Lozano F, López-Ortiz F, Soto SM. A C ∧S-Cyclometallated Gold(III) Complex as a Novel Antibacterial Candidate Against Drug-Resistant Bacteria. Front Microbiol 2022; 13:815622. [PMID: 35308343 PMCID: PMC8928146 DOI: 10.3389/fmicb.2022.815622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/13/2022] [Indexed: 12/14/2022] Open
Abstract
The worldwide emergence and spread of infections caused by multidrug-resistant bacteria endangers the efficacy of current antibiotics in the clinical setting. The lack of new antibiotics in the pipeline points to the need of developing new strategies. Recently, gold-based drugs are being repurposed for antibacterial applications. Among them, gold(III) complexes have received increasing attention as metal-based anticancer agents. However, reports on their antibacterial activity are scarce due to stability issues. The present work demonstrates the antibacterial activity of the gold(III) complex 2 stabilized as C∧S-cycloaurated containing a diphenylphosphinothioic amide moiety, showing minimum inhibitory concentration (MIC) values that ranged from 4 to 8 and from 16 to 32 mg/L among Gram-positive and Gram-negative multidrug-resistant (MDR) pathogens, respectively. Complex 2 has a biofilm inhibitory activity of only two to four times than its MIC. We also describe for the first time a potent antibacterial synergistic effect of a gold(III) complex combined with colistin, showing a bactericidal effect in less than 2 h; confirming the role of the outer membrane as a permeability barrier. Complex 2 shows a low rate of internalization in Staphylococcus aureus and Acinetobacter baumannii; it does not interact with replication enzymes or efflux pumps, causes ultrastructural damages in both membrane and cytoplasmic levels, and permeabilizes the bacterial membrane. Unlike control antibiotics, complex 2 did not generate resistant mutants in 30-day sequential cultures. We detected lower cytotoxicity in a non-tumoral THLE-2 cell line (IC50 = 25.5 μM) and no acute toxicity signs in vivo after an i.v. 1-mg/kg dose. The characterization presented here reassures the potential of complex 2 as a new chemical class of antimicrobial agents.
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Affiliation(s)
- Carlos Ratia
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Virginio Cepas
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Raquel Soengas
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Yolanda Navarro
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - María Velasco-de Andrés
- Immunoreceptors del Sistema Innat i Adaptatiu, Institut d’Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - María José Iglesias
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Francisco Lozano
- Immunoreceptors del Sistema Innat i Adaptatiu, Institut d’Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
- Servei d’Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clínic de Barcelona, Barcelona, Spain
- Departament de Biomedicina, Universitat de Barcelona, Barcelona, Spain
| | - Fernando López-Ortiz
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Sara M. Soto
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
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8
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Schmidt C, Zollo M, Bonsignore R, Casini A, Hacker S. Competitive Profiling of Ligandable Cysteines in Staphylococcus aureus with an Organogold Compound. Chem Commun (Camb) 2022; 58:5526-5529. [DOI: 10.1039/d2cc01259f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the idea of exploiting metal templated C–S bond forming reactions to achieve modification of cysteines in bacterial proteins, a cyclometalated Au(III) compound was explored in a competitive chemoproteomic approach...
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9
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Abás E, Aguirre-Ramírez D, Laguna M, Grasa L. Selective Anticancer and Antimicrobial Metallodrugs Based on Gold(III) Dithiocarbamate Complexes. Biomedicines 2021; 9:1775. [PMID: 34944591 DOI: 10.3390/biomedicines9121775] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022] Open
Abstract
New dithiocarbamate cycloaurated complexes have been synthesized and their physicochemical and in vitro antitumor properties have been evaluated. All the performed studies highlighted good transport through the blood and biodistribution, according to the balance between the properties of hydrophilicity/lipophilicity and the binding of moderate strength to the BSA protein. Furthermore, none of the complexes exhibited reduction or decomposition reactions, presenting excellent physiological stability. The in vitro cytotoxic effect was evaluated on human colon cancer cell line Caco-2/TC7, and the complexes showed great antiproliferative activity and excellent selectivity, as much less effect was detected on normal Caco-2/TC7 cells. Most of the complexes exhibit antiproliferative activity that was better than or similar to auranofin, and at least nine times better than that of cisplatin. Its action mechanism is still under discussion since no evidence of cell cycle arrest was found, but an antioxidant role was shown for some of the selective complexes. All complexes were also tested as antimicrobial drugs, exhibiting good activity towards S. aureus and E. coli. bacteria and C. albicans and C. neoformans fungi.
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Chakraborty P, Oosterhuis D, Bonsignore R, Casini A, Olinga P, Scheffers D. An Organogold Compound as Potential Antimicrobial Agent against Drug-Resistant Bacteria: Initial Mechanistic Insights. ChemMedChem 2021; 16:3060-3070. [PMID: 34181818 PMCID: PMC8518660 DOI: 10.1002/cmdc.202100342] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Indexed: 01/07/2023]
Abstract
The rise of antimicrobial resistance has necessitated novel strategies to efficiently combat pathogenic bacteria. Metal-based compounds have been proven as a possible alternative to classical organic drugs. Here, we have assessed the antibacterial activity of seven gold complexes of different families. One compound, a cyclometalated Au(III) C^N complex, showed activity against Gram-positive bacteria, including multi-drug resistant clinical strains. The mechanism of action of this compound was studied in Bacillus subtilis. Overall, the studies point towards a complex mode of antibacterial action, which does not include induction of oxidative stress or cell membrane damage. A number of genes related to metal transport and homeostasis were upregulated upon short treatment of the cells with gold compound. Toxicity tests conducted on precision-cut mouse tissue slices ex vivo revealed that the organogold compound is poorly toxic to mouse liver and kidney tissues, and may thus, be treated as an antibacterial drug candidate.
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Affiliation(s)
- Parichita Chakraborty
- Department of Molecular MicrobiologyGroningen Institute for Biomolecular Sciences and BiotechnologyUniversity of Groningen9747 AGGroningenThe Netherlands
| | - Dorenda Oosterhuis
- Department of Pharmaceutical Technology and BiopharmacyGroningen Research Institute of PharmacyUniversity of Groningen9713AVGroningenThe Netherlands
| | - Riccardo Bonsignore
- Chair of Medicinal and Bioinorganic ChemistryDepartment of ChemistryTechnical University of MunichLichtenbergstr. 485748Garching b. MünchenGermany
| | - Angela Casini
- Chair of Medicinal and Bioinorganic ChemistryDepartment of ChemistryTechnical University of MunichLichtenbergstr. 485748Garching b. MünchenGermany
| | - Peter Olinga
- Department of Pharmaceutical Technology and BiopharmacyGroningen Research Institute of PharmacyUniversity of Groningen9713AVGroningenThe Netherlands
| | - Dirk‐Jan Scheffers
- Department of Molecular MicrobiologyGroningen Institute for Biomolecular Sciences and BiotechnologyUniversity of Groningen9747 AGGroningenThe Netherlands
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11
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Fontinha D, Sousa SA, Morais TS, Prudêncio M, Leitão JH, Le Gal Y, Lorcy D, Silva RAL, Velho MFG, Belo D, Almeida M, Guerreiro JF, Pinheiro T, Marques F. Gold(iii) bis(dithiolene) complexes: from molecular conductors to prospective anticancer, antimicrobial and antiplasmodial agents. Metallomics 2021; 12:974-987. [PMID: 32391537 DOI: 10.1039/d0mt00064g] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The anticancer, antimicrobial and antiplasmodial activities of six gold(iii) bis(dithiolene) complexes were studied. Complexes 1-6 showed relevant anticancer properties against A2780/A2780cisR ovarian cancer cells (IC50 values of 0.08-2 μM), also being able to overcome cisplatin resistance in A2780cisR cells. Complex 1 also exhibited significant antimicrobial activity against Staphylococcus aureus (minimum inhibitory concentration (MIC) values of 12.1 ± 3.9 μg mL-1) and both Candida glabrata and Candida albicans (MICs of 9.7 ± 2.7 and 19.9 ± 2.4 μg mL-1, respectively). In addition, all complexes displayed antiplasmodial activity against the Plasmodium berghei parasite liver stages, even exhibiting better results than the ones obtained using primaquine, an anti-malarial drug. Mechanistic studies support the idea that thioredoxin reductase, but not DNA, is a possible target of these complexes. Complex 1 is stable under biological conditions, which would be important if this compound is ever to be considered as a drug. Overall, the results obtained evidenced the promising biological activity of complex 1, which might have potential as a novel anticancer, antimicrobial and antiplasmodial agent to be used as an alternative to current therapeutics.
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Affiliation(s)
- Diana Fontinha
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Sílvia A Sousa
- iBB-Institute for Bioengineering and Biosciences, Departmento de Bioengenharia, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Tânia S Morais
- Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Miguel Prudêncio
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Jorge H Leitão
- iBB-Institute for Bioengineering and Biosciences, Departmento de Bioengenharia, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Yann Le Gal
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Dominique Lorcy
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Rafaela A L Silva
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal.
| | - Mariana F G Velho
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal. and Instituto de Telecomunicações, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001, Lisboa, Portugal
| | - Dulce Belo
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal.
| | - M Almeida
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal.
| | - Joana F Guerreiro
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal.
| | - Teresa Pinheiro
- iBB-Institute for Bioengineering and Biosciences, Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal.
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12
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Podda E, Carla Aragoni M, Arca M, Atzeni G, Coles SJ, Ennas G, Isaia F, Lippolis V, Orru G, Scano A, Orton JB, Pintus A, Scano A. Morpholine- and Thiomorpholine-Based Amidodithiophosphonato Nickel Complexes: Synthesis, Characterization, P-N Cleavage, Antibacterial Activity and Silica Nano-Dispersion. J Nanosci Nanotechnol 2021; 21:2879-2891. [PMID: 33653454 DOI: 10.1166/jnn.2021.19058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The reactivity of thiomorpholinium P-(4-methoxyphenyl)-N-thiomorpholin-amidodithiophosphonate (S-MorH+₂)(S-Mor-adtp-) and morpholinium P-(4-methoxyphenyl)-N-morpholin-amidodithiophosphonate (O-MorH+₂)(O-Mor-adtp-) towards nickel (II) dichloride hexahydrated is presented and the hydrolysis of the relevant metal complexes investigated. The hydrolytic products (S-MorH+₂)₂ [Ni(dtp)₂]²- and (O-MorH+₂)₂[Ni(dtp)₂]²- were characterized by means of FT-IR, 1H, and 31P NMR and XRD and the experimented P-N cleavage investigated and elucidated by means of DFT calculations. The antimicrobial activity of the neutral nickel complex [Ni(S-Mor-adtp)₂] was tested against a set of Gram-positive and Gram-negative bacteria alongside with its nanodispersion in a silica matrix. The complex [Ni(S-Mor-adtp)₂] did not show antibacterial activity, whilst the nano-dispersed sample [Ni(S-Mor-adtp)₂]_SiO₂ demonstrated inhibition to growth of Staphylococcus aureus. The nanocomposites were fully characterized by means of XRPD, TGA, SEM and dinitrogen sorption techniques.
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Affiliation(s)
- Enrico Podda
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - M Carla Aragoni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - Massimiliano Arca
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - Giulia Atzeni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - Simon J Coles
- UK National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ, UK
| | - Guido Ennas
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - Francesco Isaia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - Germano Orru
- Department of Surgical Sciences, University of Cagliari, Cagliari, 09042, Italy
| | - Alessandra Scano
- Department of Surgical Sciences, University of Cagliari, Cagliari, 09042, Italy
| | - James B Orton
- UK National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ, UK
| | - Anna Pintus
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
| | - Alessandra Scano
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 Bivio Sestu, 09042 Monserrato - Cagliari, Italy
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13
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Garau A, Picci G, Arca M, Blake AJ, Caltagirone C, Filippo GD, Demartin F, Isaia F, Lippolis V, Pintus A, Scorciapino MA, Aragoni MC. Can Serendipity Still Hold Any Surprises in the Coordination Chemistry of Mixed-Donor Macrocyclic Ligands? The Case Study of Pyridine-Containing 12-Membered Macrocycles and Platinum Group Metal Ions Pd II, Pt II, and Rh III. Molecules 2021; 26:1286. [PMID: 33673411 PMCID: PMC7956204 DOI: 10.3390/molecules26051286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/09/2021] [Accepted: 02/20/2021] [Indexed: 12/25/2022] Open
Abstract
This study investigates the coordination chemistry of the tetradentate pyridine-containing 12-membered macrocycles L1-L3 towards Platinum Group metal ions PdII, PtII, and RhIII. The reactions between the chloride salts of these metal ions and the three ligands in MeCN/H2O or MeOH/H2O (1:1 v/v) are shown, and the isolated solid compounds are characterized, where possible, by mass spectroscopy and 1H- and 13C-NMR spectroscopic measurements. Structural characterization of the 1:1 metal-to-ligand complexes [Pd(L1)Cl]2[Pd2Cl6], [Pt(L1)Cl](BF4), [Rh(L1)Cl2](PF6), and [Rh(L3)Cl2](BF4)·MeCN shows the coordinated macrocyclic ligands adopting a folded conformation, and occupying four coordination sites of a distorted square-based pyramidal and octahedral coordination environment for the PdII/PtII, and RhIII complexes, respectively. The remaining coordination site(s) are occupied by chlorido ligands. The reaction of L3 with PtCl2 in MeCN/H2O gave by serendipity the complex [Pt(L3)(m-1,3-MeCONH)PtCl(MeCN)](BF4)2·H2O, in which two metal centers are bridged by an amidate ligand at a Pt1-Pt2 distance of 2.5798(3) Å and feature one square-planar and one octahedral coordination environment. Density Functional Theory (DFT) calculations, which utilize the broken symmetry approach (DFT-BS), indicate a singlet d8-d8 PtII-PtII ground-state nature for this compound, rather than the alleged d9-d7 PtI-PtIII mixed-valence character reported for related dinuclear Pt-complexes.
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Affiliation(s)
- Alessandra Garau
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - Giacomo Picci
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - Massimiliano Arca
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - Alexander J. Blake
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK;
| | - Claudia Caltagirone
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - Greta De Filippo
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - Francesco Demartin
- Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy;
| | - Francesco Isaia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - Anna Pintus
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - M. Andrea Scorciapino
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
| | - M. Carla Aragoni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato, Cagliari, Italy; (A.G.); (G.P.); (M.A.); (C.C.); (G.D.F.); (F.I.); (A.P.); (M.A.S.); (M.C.A.)
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Abstract
The smart utilization of photons is paid global attention from the viewpoint of renewable energy and information technology. However, it is still impossible to store photons as batteries and condensers do for electrons. All the present technologies utilize (the energy of) photons in situ, such as solar panels, or in spontaneous relaxation processes, such as photoluminescence. If we can store the energy of photons over an arbitrary period and utilize them on demand, not only we will make an innovative progress in energy management, but we will also be able to replace a part of electrons by photons in the information technology for more efficient performance. In this article, we review a prototype of such a material including the current status of related research as well as where we are heading for.
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Podda E, Arca M, Atzeni G, Coles SJ, Ibba A, Isaia F, Lippolis V, Orrù G, Orton JB, Pintus A, Tuveri E, Aragoni MC. Antibacterial Activity of Amidodithiophosphonato Nickel(II) Complexes: An Experimental and Theoretical Approach. Molecules 2020; 25:E2052. [PMID: 32354035 PMCID: PMC7248947 DOI: 10.3390/molecules25092052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 12/11/2022] Open
Abstract
The reactions of 2,4-bis(4-methoxyphenyl)-1,3-dithio-2,4-diphosphetane-2,4-disulfide (Lawesson's Reagent, LR) with benzylamine (BzNH2) and 4-phenylbutylamine (PhBuNH2) yield benzylammonium P-(4-methoxyphenyl)-N-benzyl-amidodithiophosphonate (BzNH3)(BzNH-adtp) and 4-phenylbutylammonium P-(4-methoxyphenyl)-N-(4-phenylbutyl)-amidodithiophosphonate (PhBuNH3)(PhBuNH-adtp). The relevant nickel complexes [Ni(BzNH-adtp)2] and [Ni(PhBuNH-adtp)2] and the corresponding hydrolysed derivatives (BzNH3)2[Ni(dtp)2] and (PhBuNH3)2[Ni(dtp)2] were prepared and fully characterized. The antimicrobial activity of the aforementioned amidodithiophosphonates against a set of Gram-positive and Gram-negative pathogen bacteria was evaluated, and [Ni(BzNH-adtp)2] and [Ni(PhBuNH-adtp)2] showed antiproliferative activity towards Staphylococcus aureus and Staphylococcus haemolyticus strains. density functional theory (DFT) calculations were performed to shed some light on the activity of reported compounds related to their tendency towards P-N bond cleavage.
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Affiliation(s)
- Enrico Podda
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 bivio Sestu, 09042 Monserrato–Cagliari, Italy
| | - Massimiliano Arca
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 bivio Sestu, 09042 Monserrato–Cagliari, Italy
| | - Giulia Atzeni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 bivio Sestu, 09042 Monserrato–Cagliari, Italy
| | - Simon J. Coles
- UK National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Antonella Ibba
- Department of Surgical Sciences, University of Cagliari, 09042 Cagliari, Italy
| | - Francesco Isaia
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 bivio Sestu, 09042 Monserrato–Cagliari, Italy
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 bivio Sestu, 09042 Monserrato–Cagliari, Italy
| | - Germano Orrù
- Department of Surgical Sciences, University of Cagliari, 09042 Cagliari, Italy
- National Research Council of Italy, ISPA-CNR, 07100 Sassari, Italy
| | - James B. Orton
- UK National Crystallography Service, School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Anna Pintus
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 bivio Sestu, 09042 Monserrato–Cagliari, Italy
| | - Enrica Tuveri
- Department of Surgical Sciences, University of Cagliari, 09042 Cagliari, Italy
| | - M. Carla Aragoni
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS. 554 bivio Sestu, 09042 Monserrato–Cagliari, Italy
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16
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Sousa SA, Leitão JH, Silva RA, Belo D, Santos IC, Guerreiro JF, Martins M, Fontinha D, Prudêncio M, Almeida M, Lorcy D, Marques F. On the path to gold: Monoanionic Au bisdithiolate complexes with antimicrobial and antitumor activities. J Inorg Biochem 2020; 202:110904. [DOI: 10.1016/j.jinorgbio.2019.110904] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/27/2019] [Accepted: 10/19/2019] [Indexed: 12/17/2022]
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Bechu D, Petre AM, Hosseini MW, Baudron SA. Heterometallic coordination polymers based on homo- and heteroleptic Au( iii) dithiolene complexes. CrystEngComm 2020. [DOI: 10.1039/d0ce01090a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel hetero- and homoleptic Au(iii) dithiolene complexes have been designed, synthesized, characterized and employed for the elaboration of heterometallic coordination networks.
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Affiliation(s)
- Damien Bechu
- Université de Strasbourg
- CNRS
- CMC UMR 7140
- Strasbourg
- France
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18
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Manca ML, Usach I, Peris JE, Ibba A, Orrù G, Valenti D, Escribano-Ferrer E, Gomez-Fernandez JC, Aranda FJ, Fadda AM, Manconi M. Optimization of Innovative Three-Dimensionally-Structured Hybrid Vesicles to Improve the Cutaneous Delivery of Clotrimazole for the Treatment of Topical Candidiasis. Pharmaceutics 2019; 11:pharmaceutics11060263. [PMID: 31174342 PMCID: PMC6630241 DOI: 10.3390/pharmaceutics11060263] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/01/2019] [Accepted: 06/04/2019] [Indexed: 12/21/2022] Open
Abstract
New three-dimensionally-structured hybrid phospholipid vesicles, able to load clotrimazole in a high amount (10 mg/mL), were obtained for the first time in this work by significantly reducing the amount of water (≤10%), which was replaced with a mixture of glycerol and ethanol (≈90%). A pre-formulation study was carried out to evaluate the effect of both the composition of the hydrating medium and the concentration of the phospholipid on the physico-chemical properties of hybrid vesicles. Four different three-dimensionally-structured hybrid vesicles were selected as ideal systems for the topical application of clotrimazole. An extensive physico-chemical characterization performed using transmission electron microscopy (TEM), cryogenic transmission electron microscopy (cryo-TEM), 31P-NMR, and small-angle X-ray scattering (SAXS) displayed the formation of small, multi-, and unilamellar vesicles very close to each other, and was capable of forming a three-dimensional network, which stabilized the dispersion. Additionally, the dilution of the dispersion with water reduced the interactions between vesicles, leading to the formation of single unilamellar vesicles. The evaluation of the in vitro percutaneous delivery of clotrimazole showed an improved drug deposition in the skin strata provided by the three-dimensionally-structured vesicles with respect to the commercial cream (Canesten®) used as a reference. Hybrid vesicles were highly biocompatible and showed a significant antifungal activity in vitro, greater than the commercial cream Canesten®. The antimycotic efficacy of formulations was confirmed by the reduced proliferation of the yeast cells at the site of infection in vivo. In light of these results, clotrimazole-loaded, three-dimensionally-structured hybrid vesicles appear to be one of the most innovative and promising formulations for the treatment of candidiasis infections.
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Affiliation(s)
- Maria Letizia Manca
- Department Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy.
| | - Iris Usach
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, Burjassot, 46100 Valencia, Spain.
| | - José Esteban Peris
- Department of Pharmacy and Pharmaceutical Technology and Parasitology, University of Valencia, Burjassot, 46100 Valencia, Spain.
| | - Antonella Ibba
- Department of Surgical Science, University of Cagliari, Molecular Biology Service Lab (MBS), Via Ospedale 40, 09124 Cagliari, Italy.
| | - Germano Orrù
- Department of Surgical Science, University of Cagliari, Molecular Biology Service Lab (MBS), Via Ospedale 40, 09124 Cagliari, Italy.
| | - Donatella Valenti
- Department Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy.
| | - Elvira Escribano-Ferrer
- Biopharmaceutics and Pharmacokinetics Unit, Institute for Nanoscience and Nanotechnology, University of Barcelona, 08028 Barcelona, Spain.
| | - Juan Carmelo Gomez-Fernandez
- Department of Biochemistry and Molecular Biology A, Regional Campus of International Excellence Campus Mare Nostrum, University of Murcia, 30080 Murcia, Spain.
| | - Francisco José Aranda
- Department of Biochemistry and Molecular Biology A, Regional Campus of International Excellence Campus Mare Nostrum, University of Murcia, 30080 Murcia, Spain.
| | - Anna Maria Fadda
- Department Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy.
| | - Maria Manconi
- Department Scienze della Vita e dell'Ambiente, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy.
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19
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Pintus A, Aragoni MC, Carcangiu G, Giacopetti L, Isaia F, Lippolis V, Maiore L, Meloni P, Arca M. Density functional theory modelling of protective agents for carbonate stones: a case study of oxalate and oxamate inorganic salts. NEW J CHEM 2018. [DOI: 10.1039/c8nj01714j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
DFT calculations allowed investigating the ability of oxalate monoesters and monoamides salts to act as protective agents for carbonate stones, such as marble or limestones, of historical interest in the field of cultural heritage.
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Affiliation(s)
- Anna Pintus
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato (Cagliari)
- Italy
| | - M. Carla Aragoni
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato (Cagliari)
- Italy
| | - Gianfranco Carcangiu
- Consiglio Nazionale delle Ricerche (CNR) Istituto di Scienze dell’Atmosfera e del Clima (ISAC) UOS di Cagliari c/o Dipartimento di Fisica
- Università degli Studi di Cagliari
- 09042 Monserrato (Cagliari)
- Italy
| | - Laura Giacopetti
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato (Cagliari)
- Italy
| | - Francesco Isaia
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato (Cagliari)
- Italy
| | - Vito Lippolis
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato (Cagliari)
- Italy
| | - Laura Maiore
- Dipartimento di Chimica e Farmacia
- Università degli Studi di Sassari
- 07100 Sassari
- Italy
| | - Paola Meloni
- Dipartimento di Ingegneria Meccanica
- Chimica e dei Materiali
- 09123 Cagliari
- Italy
| | - Massimiliano Arca
- Dipartimento di Scienze Chimiche e Geologiche
- 09042 Monserrato (Cagliari)
- Italy
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