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Soldevila-Barreda JJ, Azmanova M, Pitto-Barry A, Cooper PA, Shnyder SD, Barry NPE. Preclinical Anticancer Activity of an Electron-Deficient Organoruthenium(II) Complex. ChemMedChem 2020; 15:982-987. [PMID: 32237195 DOI: 10.1002/cmdc.202000096] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Indexed: 01/24/2023]
Abstract
Ruthenium compounds have been shown to be promising alternatives to platinum(II) drugs. However, their clinical success depends on achieving mechanisms of action that overcome Pt-resistance mechanisms. Electron-deficient organoruthenium complexes are an understudied class of compounds that exhibit unusual reactivity in solution and might offer novel anticancer mechanisms of action. Here, we evaluate the in vitro and in vivo anticancer properties of the electron-deficient organoruthenium complex [(p-cymene)Ru(maleonitriledithiolate)]. This compound is found to be highly cytotoxic: 5 to 60 times more potent than cisplatin towards ovarian (A2780 and A2780cisR), colon (HCT116 p53+/+ and HCT116 p53-/-), and non-small cell lung H460 cancer cell lines. It shows no cross-resistance and is equally cytotoxic to both A2780 and A2780cisR cell lines. Furthermore, unlike cisplatin, the remarkable in vitro antiproliferative activity of this compound appears to be p53-independent. In vivo evaluation in the hollow-fibre assay across a panel of cancer cell types and subcutaneous H460 non-small cell lung cancer xenograft model hints at the activity of the complex. Although the impressive in vitro data are not fully corroborated by the in vivo follow-up, this work is the first preclinical study of electron-deficient half-sandwich complexes and highlights their promise as anticancer drug candidates.
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Affiliation(s)
| | - Maria Azmanova
- School of Chemistry and Biosciences, University of Bradford, Bradford, BD7 1DP, UK
| | - Anaïs Pitto-Barry
- School of Chemistry and Biosciences, University of Bradford, Bradford, BD7 1DP, UK
| | - Patricia A Cooper
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK
| | - Steven D Shnyder
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK
| | - Nicolas P E Barry
- School of Chemistry and Biosciences, University of Bradford, Bradford, BD7 1DP, UK
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Pitto-Barry A, Barry NPE. Controlled Release of Carbon Monoxide from a Pseudo Electron-Deficient Organometallic Complex. ACS OMEGA 2018; 3:15623-15627. [PMID: 30533578 PMCID: PMC6275942 DOI: 10.1021/acsomega.8b02154] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 10/30/2018] [Indexed: 06/09/2023]
Abstract
A 16-electron iridium organometallic is reacted with carbon monoxide to form an 18-electron CO-adduct. This CO-adduct is stable for weeks in the solid state, but quickly reverts to its parent 16-e complex in tetrahydrofuran solution, releasing CO(g). Using a simple methodology, we show that this gas can subsequently be used to perform a carbonylation reaction on another molecule.
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Pitto-Barry A, Lupan A, Ellingford C, Attia AAA, Barry NPE. New Class of Hybrid Materials for Detection, Capture, and "On-Demand" Release of Carbon Monoxide. ACS APPLIED MATERIALS & INTERFACES 2018; 10:13693-13701. [PMID: 29652472 DOI: 10.1021/acsami.8b01776] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Carbon monoxide (CO) is both a substance hazardous to health and a side product of a number of industrial processes, such as methanol steam reforming and large-scale oxidation reactions. The separation of CO from nitrogen (N2) in industrial processes is considered to be difficult because of the similarities of their electronic structures, sizes, and physicochemical properties (e.g., boiling points). Carbon monoxide is also a major poison in fuel cells because of its adsorption onto the active sites of the catalysts. It is therefore of the utmost economic importance to discover new materials that enable effective CO capture and release under mild conditions. However, methods to specifically absorb and easily release CO in the presence of contaminants, such as water, nitrogen, carbon dioxide, and oxygen, at ambient temperature are not available. Here, we report the simple and versatile fabrication of a new class of hybrid materials that allows capture and release of carbon monoxide under mild conditions. We found that carborane-containing metal complexes encapsulated in networks made of poly(dimethylsiloxane) react with CO, even when immersed in water, leading to dramatic color and infrared signature changes. Furthermore, we found that the CO can be easily released from the materials by simply dipping the networks into an organic solvent for less than 1 min, at ambient temperature and pressure, which not only offers a straightforward recycling method, but also a new method for the "on-demand" release of carbon monoxide. We illustrated the utilization of the on-demand release of CO from the networks by carrying out a carbonylation reaction on an electron-deficient metal complex that led to the formation of the CO-adduct, with concomitant recycling of the gel. We anticipate that our sponge-like materials and scalable methodology will open up new avenues for the storage, transport, and controlled release of CO, the silent killer and a major industrial poison.
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Affiliation(s)
- Anaïs Pitto-Barry
- School of Chemistry and Biosciences , University of Bradford , Bradford BD7 1DP , United Kingdom
| | - Alexandru Lupan
- Facultatea de Chimie şi Inginerie Chimică , Universitatea Babeş-Bolyai , Cluj-Napoca 400084 , Romania
| | - Christopher Ellingford
- International Institute for Nanocomposites Manufacturing , WMG , Coventry CV4 7AL , United Kingdom
| | - Amr A A Attia
- Facultatea de Chimie şi Inginerie Chimică , Universitatea Babeş-Bolyai , Cluj-Napoca 400084 , Romania
| | - Nicolas P E Barry
- School of Chemistry and Biosciences , University of Bradford , Bradford BD7 1DP , United Kingdom
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Tsukada S, Sagawa T, Yamamoto K, Gunji T. Preparation of Ruthenium Dithiolene Complex/Polysiloxane Films and Their Responses to CO Gas. Molecules 2018; 23:molecules23040845. [PMID: 29642463 PMCID: PMC6017087 DOI: 10.3390/molecules23040845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 11/16/2022] Open
Abstract
To develop advanced materials using metal complexes, it is better to prepare metal complexes contained in composite or hybrid films. To achieve this purpose, we synthesized ruthenium complexes with dihalogen-substituted benzendithiolate ligands, [(η⁶-C₆Me₆)Ru(S₂C₆H₂X₂)] (X = F, 3,6-Cl, Br, 4,5-Cl), 1b-1e. We also investigated preparation of 1c or 1e containing polysiloxane composite films and their reactivity to CO gas. All ruthenium complexes 1b-1e reacted with CO gas, and carbonyl ligand adducts 2b-2e were generated. Ruthenium complexes 1b-1e show two strong absorption peaks around 550 and 420 nm. After exposure to CO gas, these absorption peaks were immediately decreased without a peak shift. A similar trend was observed in 1c or 1e containing polysiloxane composite films. These results indicate that 1c and 1e were easily converted into 2c and 2e, both in the solution and the polysiloxane film during CO gas exposure.
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Affiliation(s)
- Satoru Tsukada
- Advanced Materials Laboratory, Advanced Automotive Research Collaborative Laboratory, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.
| | - Takuya Sagawa
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
| | - Kazuki Yamamoto
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
| | - Takahiro Gunji
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
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Zhang J, Pitto-Barry A, Shang L, Barry NPE. Anti-inflammatory activity of electron-deficient organometallics. ROYAL SOCIETY OPEN SCIENCE 2017; 4:170786. [PMID: 29291071 PMCID: PMC5717645 DOI: 10.1098/rsos.170786] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 10/26/2017] [Indexed: 05/14/2023]
Abstract
We report an evaluation of the cytotoxicity of a series of electron-deficient (16-electron) half-sandwich precious metal complexes of ruthenium, osmium and iridium ([Os/Ru(η6-p-cymene)(1,2-dicarba-closo-dodecarborane-1,2-dithiolato)] (1/2), [Ir(η5-pentamethylcyclopentadiene)(1,2-dicarba-closo-dodecarborane-1,2-dithiolato)] (3), [Os/Ru(η6-p-cymene)(benzene-1,2-dithiolato)] (4/5) and [Ir(η5-pentamethylcyclopentadiene)(benzene-1,2-dithiolato)] (6)) towards RAW 264.7 murine macrophages and MRC-5 fibroblast cells. Complexes 3 and 6 were found to be non-cytotoxic. The anti-inflammatory activity of 1-6 was evaluated in both cell lines after nitric oxide (NO) production and inflammation response induced by bacterial endotoxin lipopolysaccharide (LPS) as the stimulus. All metal complexes were shown to exhibit dose-dependent inhibitory effects on LPS-induced NO production on both cell lines. Remarkably, the two iridium complexes 3 and 6 trigger a full anti-inflammatory response against LPS-induced NO production, which opens up new avenues for the development of non-cytotoxic anti-inflammatory drug candidates with distinct structures and solution chemistry from that of organic drugs, and as such with potential novel mechanisms of action.
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Affiliation(s)
| | | | - Lijun Shang
- Authors for correspondence: Lijun Shang e-mail:
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Sinopalnikova IS, Peganova TA, Novikov VV, Fedyanin IV, Filippov OA, Belkova NV, Shubina ES, Poli R, Kalsin AM. Coordinatively Labile 18-Electron Arene Ruthenium Iminophosphonamide Complexes. Chemistry 2017; 23:15424-15435. [DOI: 10.1002/chem.201702862] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Iana S. Sinopalnikova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
- Laboratoire de Chimie de Coordination CNRS; Université de Toulouse, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
| | - Tat'yana A. Peganova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Valentin V. Novikov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Ivan V. Fedyanin
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Natalia V. Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Rinaldo Poli
- Laboratoire de Chimie de Coordination CNRS; Université de Toulouse, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
- Institut Universitaire de France; 1, rue Descartes 75231 Paris Cedex 05 France
| | - Alexander M. Kalsin
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
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Sagawa T, Tsukada S, Yamamoto K, Gunji T. Structural and Electrochemical Properties of a Ruthenium–Diiron Dithiolene Complex. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700783] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Takuya Sagawa
- Department of Pure and Applied Chemistry Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki 278‐8510 Noda, Chiba Japan
| | - Satoru Tsukada
- Advanced Materials Laboratory Advanced Automotive Research Collaborative Laboratory Graduate School of Engineering Hiroshima University 1‐4‐1 Kagamiyama 739‐8527 Higashi‐Hiroshima, Hiroshima Japan
| | - Kazuki Yamamoto
- Department of Pure and Applied Chemistry Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki 278‐8510 Noda, Chiba Japan
| | - Takahiro Gunji
- Department of Pure and Applied Chemistry Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki 278‐8510 Noda, Chiba Japan
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Pitto-Barry A, Lupan A, Zegke M, Swift T, Attia AAA, Lord RM, Barry NPE. Pseudo electron-deficient organometallics: limited reactivity towards electron-donating ligands. Dalton Trans 2017; 46:15676-15683. [DOI: 10.1039/c7dt02827j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This work presents the unusual reactivity of a family of electron-deficient half-sandwich metal complexes.
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Affiliation(s)
- Anaïs Pitto-Barry
- School of Chemistry and Biosciences
- University of Bradford
- Bradford BD7 1DP
- UK
| | - Alexandru Lupan
- Facultatea de Chimie şi Inginerie Chimică
- Universitatea Babeş-Bolyai
- Cluj-Napoca
- Romania
| | - Markus Zegke
- School of Chemistry and Biosciences
- University of Bradford
- Bradford BD7 1DP
- UK
| | - Thomas Swift
- School of Chemistry and Biosciences
- University of Bradford
- Bradford BD7 1DP
- UK
| | - Amr A. A. Attia
- Facultatea de Chimie şi Inginerie Chimică
- Universitatea Babeş-Bolyai
- Cluj-Napoca
- Romania
| | - Rianne M. Lord
- School of Chemistry and Biosciences
- University of Bradford
- Bradford BD7 1DP
- UK
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