1
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Trommenschlager A, Mabrouk N, Racoeur C, Godard A, Balan C, Dubrez L, Bettaïeb A, Husson J, Le Gendre P, Paul C, Bodio E. From the Design of Innovative Ti-Pt Heterometallic Complexes to the Development of Highly Anti-Proliferative Water-Soluble Cationic Titanocenes. Chembiochem 2024:e202400099. [PMID: 38749920 DOI: 10.1002/cbic.202400099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/19/2024] [Indexed: 07/27/2024]
Abstract
Two innovative early/late Ti-Pt-heterobimetallic complexes were synthesized, characterized, and screened in cell-based assays using several human (SW480 and MDA-MB-231) and murine cancer cell lines (CT26 and EMT6) as well as a non-cancerous cell line (HMEC). The combination of the two metals - titanium(IV) and platinum (IV) - in a single molecule led to a synergistic biological activity (higher anti-proliferative properties than a mixture of each of the corresponding monometallic complexes). This study also investigated the benefits of associating a metal-free terpyridine moiety (with intrinsic biological activity) with a water-soluble titanocene fragment. The present work reveals that these combinations results in water-soluble titanocene compounds displaying an anti-proliferative activity down to the submicromolar level. One of these complexes induced an antitumor effect in vivo in CT26 tumor bearing BALB/C mice. The terpyridine moiety was also used to track the complex in vitro by multiphoton microscopy imaging.
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Affiliation(s)
- Audrey Trommenschlager
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB UMR CNRS 6302), Université de Bourgogne, 21000, Dijon, France
| | - Nesrine Mabrouk
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC, EA7269) EPHE, PSL Research University, 75000, Paris, France, Université de Bourgogne, 21000, Dijon, France
| | - Cindy Racoeur
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC, EA7269) EPHE, PSL Research University, 75000, Paris, France, Université de Bourgogne, 21000, Dijon, France
| | - Amélie Godard
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB UMR CNRS 6302), Université de Bourgogne, 21000, Dijon, France
| | - Cédric Balan
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB UMR CNRS 6302), Université de Bourgogne, 21000, Dijon, France
| | - Laurence Dubrez
- LNC UMR1231, Institut National de la Santé et de la Recherche Médicale (Inserm), Université de Bourgogne, 21000, Dijon, France
| | - Ali Bettaïeb
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC, EA7269) EPHE, PSL Research University, 75000, Paris, France, Université de Bourgogne, 21000, Dijon, France
| | - Jérôme Husson
- Institut UTINAM UMR6213, Univ. de Franche-Comté, 25030, Besançon Cedex, France
| | - Pierre Le Gendre
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB UMR CNRS 6302), Université de Bourgogne, 21000, Dijon, France
| | - Catherine Paul
- Laboratoire d'Immunologie et Immunothérapie des Cancers (LIIC, EA7269) EPHE, PSL Research University, 75000, Paris, France, Université de Bourgogne, 21000, Dijon, France
| | - Ewen Bodio
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB UMR CNRS 6302), Université de Bourgogne, 21000, Dijon, France
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2
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Casini A, Pöthig A. Metals in Cancer Research: Beyond Platinum Metallodrugs. ACS CENTRAL SCIENCE 2024; 10:242-250. [PMID: 38435529 PMCID: PMC10906246 DOI: 10.1021/acscentsci.3c01340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 03/05/2024]
Abstract
The discovery of the medicinal properties of platinum complexes has fueled the design and synthesis of new anticancer metallodrugs endowed with unique modes of action (MoA). Among the various families of experimental antiproliferative agents, organometallics have emerged as ideal platforms to control the compounds' reactivity and stability in a physiological environment. This is advantageous to efficiently deliver novel prodrug activation strategies, as well as to design metallodrugs acting only via noncovalent interactions with their pharmacological targets. Noteworthy, another justification for the advance of organometallic compounds for therapy stems from their ability to catalyze bioorthogonal reactions in cancer cells. When not yet ideal as drug leads, such compounds can be used as selective chemical tools that benefit from the advantages of catalytic amplification to either label the target of interest (e.g., proteins) or boost the output of biochemical signals. Examples of metallodrugs for the so-called "catalysis in cells" are considered in this Outlook together with other organometallic drug candidates. The selected case studies are discussed in the frame of more general challenges in the field of medicinal inorganic chemistry.
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Affiliation(s)
- Angela Casini
- Chair
of Medicinal and Bioinorganic Chemistry, Department of Chemistry,
School of Natural Sciences, Technical University
of Munich, Lichtenbergstraße 4, D-85748 Garching b. München, Germany
| | - Alexander Pöthig
- Catalysis
Research Center & Department of Chemistry, School of Natural Sciences, Technical University of Munich, Ernst-Otto-Fischer Str. 1, D-85748 Garching b. München, Germany
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3
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Koller AJ, Saini S, Chaple IF, Joaqui-Joaqui MA, Paterson BM, Ma MT, Blower PJ, Pierre VC, Robinson JR, Lapi SE, Boros E. A General Design Strategy Enabling the Synthesis of Hydrolysis-Resistant, Water-Stable Titanium(IV) Complexes. Angew Chem Int Ed Engl 2022; 61:e202201211. [PMID: 35263017 DOI: 10.1002/anie.202201211] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 11/06/2022]
Abstract
Despite its prevalence in the environment, the chemistry of the Ti4+ ion has long been relegated to organic solutions or hydrolyzed TiO2 polymorphs. A knowledge gap in stabilizing molecular Ti4+ species in aqueous environments has prevented the use of this ion for various applications such as radioimaging, design of water-compatible metal-organic frameworks (MOFs), and aqueous-phase catalysis applications. Herein, we show a thorough thermodynamic screening of bidentate chelators with Ti4+ in aqueous solution, as well as computational and structural analyses of key compounds. In addition, the hexadentate analogues of catechol (benzene-1,2-diol) and deferiprone (3-hydroxy-1,2-dimethyl-4(1H)-pyridone), TREN-CAM and THPMe respectively, were assessed for chelation of the 45 Ti isotope (t1/2 =3.08 h, β+ =85 %, Eβ+ =439 keV) towards positron emission tomography (PET) imaging applications. Both were found to have excellent capacity for kit-formulation, and [45 Ti]Ti-TREN-CAM was found to have remarkable stability in vivo.
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Affiliation(s)
- Angus J Koller
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA
| | - Shefali Saini
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 25294, USA
| | - Ivis F Chaple
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 25294, USA
| | | | - Brett M Paterson
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas Hospital, London, SE1 7EH, UK
| | - Michelle T Ma
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas Hospital, London, SE1 7EH, UK
| | - Philip J Blower
- School of Biomedical Engineering and Imaging Sciences, King's College London, St. Thomas Hospital, London, SE1 7EH, UK
| | - Valérie C Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA
| | - Jerome R Robinson
- Department of Chemistry, Brown University, Providence, RI 02912, USA
| | - Suzanne E Lapi
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 25294, USA
| | - Eszter Boros
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794, USA
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4
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Koller AJ, Saini S, Chaple IF, Joaqui‐Joaqui MA, Paterson BM, Ma MT, Blower PJ, Pierre VC, Robinson JR, Lapi SE, Boros E. A General Design Strategy Enabling the Synthesis of Hydrolysis‐Resistant, Water‐Stable Titanium(IV) Complexes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Angus J. Koller
- Department of Chemistry Stony Brook University Stony Brook NY 11794 USA
| | - Shefali Saini
- Department of Radiology University of Alabama at Birmingham Birmingham AL 25294 USA
| | - Ivis F. Chaple
- Department of Radiology University of Alabama at Birmingham Birmingham AL 25294 USA
| | | | - Brett M. Paterson
- School of Biomedical Engineering and Imaging Sciences King's College London St. Thomas Hospital London SE1 7EH UK
| | - Michelle T. Ma
- School of Biomedical Engineering and Imaging Sciences King's College London St. Thomas Hospital London SE1 7EH UK
| | - Philip J. Blower
- School of Biomedical Engineering and Imaging Sciences King's College London St. Thomas Hospital London SE1 7EH UK
| | - Valérie C. Pierre
- Department of Chemistry University of Minnesota Minneapolis MN 55455 USA
| | | | - Suzanne E. Lapi
- Department of Radiology University of Alabama at Birmingham Birmingham AL 25294 USA
| | - Eszter Boros
- Department of Chemistry Stony Brook University Stony Brook NY 11794 USA
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5
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Rizk MG, Emara AA, Mahmoud NH. Spectroscopic studies, DFT calculations, thermal analysis, anti-cancer evaluation of new metal complexes of 2-hydroxy-N-(4-phenylthiazol-2-yl)benzamide. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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6
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Titanium(IV) complex containing ONO-tridentate Schiff base ligand: Synthesis, crystal structure determination, Hirshfeld surface analysis, spectral characterization, theoretical and computational studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130653] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Semeniuchenko V, Sharif S, Day J, Chandrasoma N, Pietro WJ, Manthorpe J, Braje WM, Organ MG. (DiMeIHept Cl)Pd: A Low-Load Catalyst for Solvent-Free (Melt) Amination. J Org Chem 2021; 86:10343-10359. [PMID: 34254799 DOI: 10.1021/acs.joc.1c01057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(DiMeIHeptCl)Pd, a hyper-branched N-aryl Pd NHC catalyst, has been shown to be efficient at performing amine arylation reactions in solvent-free ("melt") conditions. The highly lipophilic environment of the alkyl chains flanking the Pd center serves as lubricant to allow the complex to navigate through the paste-like environment of these mixtures. The protocol can be used on a multi-gram scale to make a variety of aniline derivatives, including substrates containing alcohol moieties.
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Affiliation(s)
- Volodymyr Semeniuchenko
- Centre for Catalysis Research and Innovation (CCRI), Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Sepideh Sharif
- Department of Chemistry, Carleton University, 203 Steacie Building, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - Jonathan Day
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada
| | - Nalin Chandrasoma
- Department of Chemistry, Carleton University, 203 Steacie Building, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada.,Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada
| | - William J Pietro
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada
| | - Jeffrey Manthorpe
- Department of Chemistry, Carleton University, 203 Steacie Building, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - Wilfried M Braje
- AbbVie Deutschland GmbH & Co. KG, Neuroscience Discovery Research, Knollstrasse, 67061 Ludwigshafen, Germany
| | - Michael G Organ
- Centre for Catalysis Research and Innovation (CCRI), Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.,Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada
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8
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Chen I, Ganta PK, Chung S, Chang Y, Chang H, Ding S, Chen H, Chiu C, Wu K. Titanium complexes bearing 2,
6‐bis
(
o
‐hydroxyalkyl)pyridine ligands in vitro cytotoxicity against
triple‐negative breast‐cancer
cells. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202000393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- I‐Ni Chen
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center, Kaohsiung Medical University Kaohsiung Taiwan
| | - Prasanna Kumar Ganta
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center, Kaohsiung Medical University Kaohsiung Taiwan
| | - Shou‐Jie Chung
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center, Kaohsiung Medical University Kaohsiung Taiwan
| | - Yu‐Lun Chang
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center, Kaohsiung Medical University Kaohsiung Taiwan
| | - Heng‐Yi Chang
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center, Kaohsiung Medical University Kaohsiung Taiwan
| | - Shangwu Ding
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center, Kaohsiung Medical University Kaohsiung Taiwan
- Department of Chemistry National Sun Yat‐Sen University Kaohsiung Taiwan
| | - Hsuan‐Ying Chen
- Department of Medicinal and Applied Chemistry Drug Development and Value Creation Research Center, Kaohsiung Medical University Kaohsiung Taiwan
- Department of Chemistry National Sun Yat‐Sen University Kaohsiung Taiwan
- Department of Medical Research Kaohsiung Medical University Hospital Kaohsiung Taiwan
| | - Chien‐Chih Chiu
- Department of Biotechnology Kaohsiung Medical University Kaohsiung Taiwan
| | - Kuo‐Hui Wu
- Department of Chemistry, Graduate School of Science The University of Tokyo Tokyo Japan
- Department of Chemistry Tamkang University New Taipei City Taiwan
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9
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Galván-Hidalgo JM, Roldán-Marchán DM, González-Hernández A, Ramírez-Apan T, Nieto-Camacho A, Hernández-Ortega S, Gómez E. Organotin (IV) complexes from Schiff bases ligands based on 2-amino-3-hydroxypyridine: synthesis, characterization, and cytotoxicity. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02630-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Nahari G, Braitbard O, Larush L, Hochman J, Tshuva EY. Effective Oral Administration of an Antitumorigenic Nanoformulated Titanium Complex. ChemMedChem 2020; 16:108-112. [PMID: 32657024 DOI: 10.1002/cmdc.202000384] [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: 06/04/2020] [Indexed: 12/13/2022]
Abstract
Orally administered anticancer drugs facilitate treatment, but the acidic conditions in the stomach often challenge their availability. PhenolaTi is a TiIV -based nontoxic anticancer drug with marked in-vivo efficacy. We report that nanoformulation protects phenolaTi from decomposition in stomach-like conditions. This is evidenced by similar NMR characteristics and similar in-vitro cytotoxicity toward murine (CT-26) and human (HT-29) colon cancer cells before and after incubation of nanoformulated phenolaTi (phenolaTi-F) at pH 2, unlike results with the unformulated form of the complex. Furthermore, administration of phenolaTi-F in animal drinking water revealed a notable inhibition of tumor growth in Balb/c and immune-deficient (Nude) mice inoculated with CT-26 and HT-29 cells, respectively. In-vivo efficacy was at least similar to that of the corresponding intraperitoneal treatment with phenolaTi-F and the clinically employed oral drug, capecitabine. No body weight loss or clinical signs of toxicity were evident in the phenolaTi-F-treated animals. These findings demonstrate a new convenient mode of cancer treatment through oral administration by safe titanium-based drugs.
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Affiliation(s)
- Gilad Nahari
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Ori Braitbard
- Department of Cell and Developmental Biology, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Liraz Larush
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Jacob Hochman
- Department of Cell and Developmental Biology, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Edit Y Tshuva
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
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11
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Gurung RK, McMillen CD, Jarrett WL, Holder AA. Synthesis, characterization, NMR spectroscopic, and X-ray crystallographic studies of new titanium(IV) Schiff base salen complexes: Formation of intriguing titanium(IV) species. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119496] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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12
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Salan vs. salen metal complexes in catalysis and medicinal applications: Virtues and pitfalls. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.02.035] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Deacon-Price C, Romano D, Riedel T, Dyson PJ, Blom B. Synthesis, characterisation and cytotoxicity studies of ruthenium arene complexes bearing trichlorogermyl ligands. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Manne R, Miller M, Duthie A, Guedes da Silva MFC, Tshuva EY, Basu Baul TS. Cytotoxic homoleptic Ti(iv) compounds of ONO-type ligands: synthesis, structures and anti-cancer activity. Dalton Trans 2019; 48:304-314. [DOI: 10.1039/c8dt03747g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reacting variously substituted dianionic tridentate ONO-type acylhydrazone ligands with titanium(iv) tetra(isopropoxide) gave a new class of eight homoleptic titanium(iv) compounds showing exceptional stability and promising cytotoxicity.
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Affiliation(s)
- Rajesh Manne
- Centre of Advanced Studies in Chemistry
- North-Eastern Hill Unversity
- Shillong 793 022
- India
| | - Maya Miller
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Jerusalem 9190401
- Israel
| | - Andrew Duthie
- School of Life and Environmental Science
- Deakin University
- Geelong
- Australia
| | | | - Edit Y. Tshuva
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Jerusalem 9190401
- Israel
| | - Tushar S. Basu Baul
- Centre of Advanced Studies in Chemistry
- North-Eastern Hill Unversity
- Shillong 793 022
- India
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15
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Miller M, Tshuva EY. Racemic vs. enantiopure inert Ti(iv) complex of a single diaminotetrakis(phenolato) ligand in anticancer activity toward human drug-sensitive and -resistant cancer cell lines. RSC Adv 2018; 8:39731-39734. [PMID: 30713687 PMCID: PMC6333245 DOI: 10.1039/c8ra08925f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Accepted: 11/21/2018] [Indexed: 12/16/2022] Open
Abstract
A tetrakis(phenolato) Ti(iv) complex was synthesized in racemic and optically pure form, exhibiting high hydrolytic stability, and similar cytotoxicity for all stereochemical forms on HT-29 and A2780 cancer cells. Higher activity of the racemate on drug-resistant A2780cp and A2780adr lines implies a beneficial activity of both enantiomers rendering enantiomeric resolution unnecessary.
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Affiliation(s)
- Maya Miller
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
| | - Edit Y Tshuva
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
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16
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Durr CB, Williams CK. New Coordination Modes for Modified Schiff Base Ti(IV) Complexes and Their Control over Lactone Ring-Opening Polymerization Activity. Inorg Chem 2018; 57:14240-14248. [PMID: 30376308 DOI: 10.1021/acs.inorgchem.8b02271] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A series of eight new bis(alkoxy)bis(phenoxy-imine)titanium(IV) catalysts, coordinated by Schiff base ligands derived from o-vanillin (2-hydroxy-3-methoxybenzaldehyde), show good activity and control for the ring-opening polymerization of ε-caprolactone and ω-pentadecalactone. The new complexes are easily prepared in two high-yield steps from commercial reagents. The new ligands can all adopt two different coordination modes, depending on the steric bulk on the imine: a six-membered N-O chelate and/or a five-membered O-O chelate. The complexes show three different structures, depending on the ligand coordination mode: type A (N-O:N-O), type B (N-O:O-O), and type C (O-O:O-O). In all cases, the structures were confirmed in solution using variable temperature NMR spectroscopy and in the solid state using X-ray crystallography. The complex structure influences the polymerization rate, with the catalytic activities decreasing in the order: type C > type B > type A for both monomers. Overall, the work demonstrates potential to use these new ligands to access particular coordination modes, which allows enhancement of catalytic activity.
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Affiliation(s)
- Christopher B Durr
- Chemistry Research Laboratory, Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , United Kingdom
| | - Charlotte K Williams
- Chemistry Research Laboratory, Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford OX1 3TA , United Kingdom
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17
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Ganot N, Briaitbard O, Gammal A, Tam J, Hochman J, Tshuva EY. In Vivo Anticancer Activity of a Nontoxic Inert Phenolato Titanium Complex: High Efficacy on Solid Tumors Alone and Combined with Platinum Drugs. ChemMedChem 2018; 13:2290-2296. [PMID: 30203598 PMCID: PMC6282713 DOI: 10.1002/cmdc.201800551] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Indexed: 11/10/2022]
Abstract
Due to the toxicity of platinum compounds used in the clinic as anticancer chemotherapies, titanium serves as a safe and attractive alternative. Lately, we introduced a new family of Ti complexes based on readily available phenolato ligands, demonstrating incredibly high hydrolytic stability, with the lead compound phenolaTi demonstrating wide cytotoxic activity toward the NCI‐60 panel of human cancer cell lines, with an average GI50 value of 4.7±2 μm. Herein, we evaluated in vivo: a) the safety, and b) the growth inhibitory capacity (efficacy) of this compound. PhenolaTi was found to be effective in vivo against colon (CT‐26) and lung (LLC‐1) murine cell lines in syngeneic hosts and toward a human colon cancer (HT‐29) cell line in immune‐deficient (Nude) mice, with an efficacy similar to that of known chemotherapy. Notably, no clinical signs of toxicity were observed in the treated mice, namely, no effect on body weight, spleen weight or kidney function, unlike the effects observed with the positive control Pt drugs. Studies of combinations of phenolaTi and Pt drugs provided evidence that similar efficacy with decreased toxicity may be achieved, which is highly valuable for medicinal applications.
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Affiliation(s)
- Nitzan Ganot
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Ori Briaitbard
- Department of Cell and Developmental Biology, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Asaad Gammal
- Obesity and Metabolism Laboratory, The Institute for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, 9112001, Israel
| | - Joseph Tam
- Obesity and Metabolism Laboratory, The Institute for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, 9112001, Israel
| | - Jacob Hochman
- Department of Cell and Developmental Biology, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Edit Y Tshuva
- The Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
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18
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Miller-Shakesby DM, Nigam S, Hughes DL, Lopez-Estelles E, Elsegood MRJ, Cawthorne CJ, Archibald SJ, Redshaw C. Synthesis, crystal structure, and cytotoxicity studies of titanacalix[4 and 8]arene complexes. Dalton Trans 2018; 47:8992-8999. [PMID: 29922776 DOI: 10.1039/c8dt01992d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Reaction of 5,11,17,23-tetra-tert-butyl-dihydroxy-26,28-bis(2-pentoxy)calix[4]arene (L(OH)2(Opentyl)2) with [TiCl4] afforded the dichlorotitanoacalix[4]arene complex [TiCl2L(O)2(Opentyl)2] (1) in good yield. Hydrolysis of 1 led to the isolation of the complex {[TiL(O)3(Opentyl)]2(μ-OH)(μ-Cl)} (2). Reaction of 5,11,17,23,29,35,41,47-p-tert-butyl-49,50,51,52,53,54,55,56-octapropoxycalix[8]arene (L'(Opropyl)8) with [TiCl4] in refluxing toluene afforded, following work-up, a 35 : 65 mixture (3) of the complex [Ti(NCMe)Cl]2[TiCl(μ-O)]2L' and the silicone grease derived complex [Ti(NCMe)Cl]2[Ti(μ-O)]2[OSi(CH3)2OSi(CH3)2O]L' in which the grease replaces two chloride ligands. The molecular structures of 1·2MeCN, 2·7¼MeCN, and 3·10MeCN have been determined. The complexes were studied using in vitro cell assays and were found to have CC50 values in the range 111-186 μM, i.e. they have low toxicity.
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Affiliation(s)
- David M Miller-Shakesby
- Chemistry, School of Mathematics and Physical Sciences, University of Hull, Hull, HU6 7RX, UK.
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Miller M, Tshuva EY. Synthesis of Pure Enantiomers of Titanium(IV) Complexes with Chiral Diaminobis(phenolato) Ligands and Their Biological Reactivity. Sci Rep 2018; 8:9705. [PMID: 29946136 PMCID: PMC6018713 DOI: 10.1038/s41598-018-27735-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 06/08/2018] [Indexed: 12/21/2022] Open
Abstract
Racemic and enantiomerically pure titanium(IV) complexes with ortho-brominated or para-nitrated chiral diaminobis(phenolato) ligands were prepared with NH and NMe cyclohexyldiamino bridges through ligand to metal chiral induction. The hydrolytic behavior of the complexes was evaluated, identifying the N-methylated complex as the most stable. A representative NH complex hydrolyzed to first give a dimeric structure in solution as deduced by NMR diffusion measurements, followed by formation of clusters with higher nuclearity, as was supported by X-ray characterization of a tetranuclear cluster obtained in trace amounts following 30 days in water solutions. The cytotoxicity of the enantiomerically pure and racemic complexes was measured on HT-29 human colon cancer cell line based on the MTT assay; all stereochemical configurations of the N-methylated complex were inactive, whereas for the NH complexes, the racemic mixtures were mostly inactive but the pure enantiomers exhibited similarly high cytotoxicity, supporting a polynuclear active species. Analysis of the two enantiomers of the most active brominated complex for their cytotoxicity on human ovarian A2780, cisplatin resistant A2780cp and multi-drug-resistant A2780adr cell lines as well as for their apoptosis induction on the A2780 line revealed similar reactivity, supporting a similar mechanism for the two enantiomers.
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Affiliation(s)
- Maya Miller
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Edit Y Tshuva
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel.
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Tzubery A, Melamed-Book N, Tshuva EY. Fluorescent antitumor titanium(iv) salen complexes for cell imaging. Dalton Trans 2018; 47:3669-3673. [DOI: 10.1039/c7dt04828a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
First live cell imaging using florescent salen Ti(iv) complexes, which are cytotoxic and inactive, both entering the cell but with different subcellular accumulations.
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Affiliation(s)
- Avia Tzubery
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Jerusalem 9190401
- Israel
| | - Naomi Melamed-Book
- The Bio-Imaging Unit
- The Alexander Silberman Institute of Life Sciences
- The Hebrew University of Jerusalem
- Jerusalem 9190401
- Israel
| | - Edit Y. Tshuva
- Institute of Chemistry
- The Hebrew University of Jerusalem
- Jerusalem 9190401
- Israel
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