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Weynand J, Bonnet H, Loiseau F, Ravanat JL, Dejeu J, Defrancq E, Elias B. Targeting G-Rich DNA Structures with Photoreactive Bis-Cyclometallated Iridium(III) Complexes. Chemistry 2019; 25:12730-12739. [PMID: 31290208 DOI: 10.1002/chem.201902183] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/02/2019] [Indexed: 01/19/2023]
Abstract
The synthesis and characterisation of three novel iridium(III) bis-cyclometallated complexes is reported. Their photophysics have been fully characterised by classical methods and revealed charge-transfer (CT) and ligand-centred (LC) transitions. Their ability to selectively interact with G-quadruplex telomeric DNA over duplex DNA has been studied by circular dichroism (CD), bio-layer interferometry (BLI) and surface plasmon resonance (SPR) analyses. Interestingly, one of the complexes was able to promote photoinduced electron transfer (PET) with the guanine DNA base, which in turn led to oxidative damage (such as the formation of 8-oxoguanine) to the telomeric sequence. To the best of our knowledge, this is the first study of highly photo-oxidising bis-cyclometallated iridium(III) complexes with G-quadruplex telomeric DNA.
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Affiliation(s)
- Justin Weynand
- Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Université catholique de Louvain (UCLouvain), Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium.,CNRS, DCM UMR5250, Université Grenoble Alpes, 38000, Grenoble, France
| | - Hughes Bonnet
- CNRS, DCM UMR5250, Université Grenoble Alpes, 38000, Grenoble, France
| | | | - Jean-Luc Ravanat
- CEA, CNRS, INAC-SyMMES, Université Grenoble Alpes, 17 rue des martyrs, 38054, Grenoble CEDEX 9, France
| | - Jérôme Dejeu
- CNRS, DCM UMR5250, Université Grenoble Alpes, 38000, Grenoble, France
| | - Eric Defrancq
- CNRS, DCM UMR5250, Université Grenoble Alpes, 38000, Grenoble, France
| | - Benjamin Elias
- Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST), Université catholique de Louvain (UCLouvain), Place Louis Pasteur 1, bte L4.01.02, 1348, Louvain-la-Neuve, Belgium
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Hager LA, Mokesch S, Kieler C, Alonso-de Castro S, Baier D, Roller A, Kandioller W, Keppler BK, Berger W, Salassa L, Terenzi A. Ruthenium-arene complexes bearing naphthyl-substituted 1,3-dioxoindan-2-carboxamides ligands for G-quadruplex DNA recognition. Dalton Trans 2019; 48:12040-12049. [PMID: 31292575 DOI: 10.1039/c9dt02078k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Quadruplex nucleic acids - DNA/RNA secondary structures formed in guanine rich sequences - proved to have key roles in the biology of cancers and, as such, in recent years they emerged as promising targets for small molecules. Many reports demonstrated that metal complexes can effectively stabilize quadruplex structures, promoting telomerase inhibition, downregulation of the expression of cancer-related genes and ultimately cancer cell death. Although extensively explored as anticancer agents, studies on the ability of ruthenium arene complexes to interact with quadruplex nucleic acids are surprisingly almost unknown. Herein, we report on the synthesis and characterization of four novel Ru(ii) arene complexes with 1,3-dioxoindan-2-carboxamides ligands bearing pendant naphthyl-groups designed to bind quadruplexes by both stacking and coordinating interactions. We show how improvements on the hydrolytic stability of such complexes, by substituting the chlorido leaving ligand with pyridine, have a dramatic impact on their interaction with quadruplexes and on their cytotoxicity against ovarian cancer cells.
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Affiliation(s)
- Laura A Hager
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 42, A-1090 Vienna, Austria.
| | - Stephan Mokesch
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 42, A-1090 Vienna, Austria.
| | - Claudia Kieler
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | | | - Dina Baier
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | - Alexander Roller
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 42, A-1090 Vienna, Austria.
| | - Wolfgang Kandioller
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 42, A-1090 Vienna, Austria.
| | - Bernhard K Keppler
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 42, A-1090 Vienna, Austria.
| | - Walter Berger
- Department of Medicine I, Institute of Cancer Research and Comprehensive Cancer Center, Medical University Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | - Luca Salassa
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia, 20018, Spain and Ikerbasque, Basque Foundation for Science, Bilbao, 48013, Spain
| | - Alessio Terenzi
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Str. 42, A-1090 Vienna, Austria. and Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia, 20018, Spain
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O'Hagan MP, Morales JC, Galan MC. Binding and Beyond: What Else Can G-Quadruplex Ligands Do? European J Org Chem 2019. [DOI: 10.1002/ejoc.201900692] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Juan C. Morales
- Instituto de Parasitología y Biomedicina “López Neyra”; Consejo Superior de Investigaciones Científicas (CSIC); PTS Granada; Avenida del Conocimiento 17 18016 Armilla, Granada Spain
| | - M. Carmen Galan
- School of Chemistry; University of Bristol; Cantock's Close BS8 1TS UK
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McQuaid K, Hall JP, Baumgaertner L, Cardin DJ, Cardin CJ. Three thymine/adenine binding modes of the ruthenium complex Λ-[Ru(TAP)2(dppz)]2+ to the G-quadruplex forming sequence d(TAGGGTT) shown by X-ray crystallography. Chem Commun (Camb) 2019; 55:9116-9119. [DOI: 10.1039/c9cc04316k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Λ-[Ru(TAP)2(dppz)]2+ was crystallised with the G-quadruplex-forming heptamer d(TAGGGTT).
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Affiliation(s)
- Kane McQuaid
- Department of Chemistry
- University of Reading
- Whiteknights
- Reading
- UK
| | - James P. Hall
- Diamond Light Source Ltd
- Harwell Science and Innovation Campus
- Didcot
- UK
- Department of Pharmacy
| | | | - David J. Cardin
- Department of Chemistry
- University of Reading
- Whiteknights
- Reading
- UK
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