1
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Gillard M, Bonnet H, Lartia R, Yacoub H, Dejeu J, Defrancq E, Elias B. Luminescent Ruthenium(II) Complexes Used for the Detection of 8-Oxoguanine in the Human Telomeric Sequence. Bioconjug Chem 2023; 34:414-421. [PMID: 36689988 DOI: 10.1021/acs.bioconjchem.2c00578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Detecting cancer at the early stage of the disease is crucial to keep the best chance for successful treatment. The recent development of genomic screening, a methodology that is addressed to asymptomatic patients presumably at risk of carcinogenesis, has stimulated the quest for new tools able to signal the level of risk. Carcinogenesis has been associated to chronic oxidative stress exceeding the antioxidant defenses and leading to critical genome alteration levels. The telomeric regions are presumably the most exposed to oxidative stress due to their high concentration of guanine (i.e., the easiest oxidizable nucleic base). Accumulation of 8-oxoguanine in telomeres, thus oxidative lesions, was reportedly associated with telomeric crisis and carcinogenesis. In this study, we report on the capacity of Ru(II) polyazaaromatic complexes to photoprobe 8-oxoguanine into the human telomeric sequence with the view of developing new tools for cancer risk screening.
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Affiliation(s)
- Martin Gillard
- Molecular Chemistry, Materials and Catalysis (MOST), Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur 1, bte L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Hugues Bonnet
- Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble-Alpes (UGA), CS 40700, 38058 Grenoble, France
| | - Rémy Lartia
- Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble-Alpes (UGA), CS 40700, 38058 Grenoble, France
| | - Hiba Yacoub
- Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble-Alpes (UGA), CS 40700, 38058 Grenoble, France
| | - Jérôme Dejeu
- Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble-Alpes (UGA), CS 40700, 38058 Grenoble, France.,CNRS UMR-6174, FEMTO-ST Institute, Université de Bourgogne Franche-Comté, F-25000 Besançon, France
| | - Eric Defrancq
- Département de Chimie Moléculaire, UMR CNRS 5250, Université Grenoble-Alpes (UGA), CS 40700, 38058 Grenoble, France
| | - Benjamin Elias
- Molecular Chemistry, Materials and Catalysis (MOST), Université catholique de Louvain (UCLouvain), Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur 1, bte L4.01.02, B-1348 Louvain-la-Neuve, Belgium
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2
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Gillard M, Piraux G, Daenen M, Abraham M, Troian‐Gautier L, Bar L, Bonnet H, Loiseau F, Jamet H, Dejeu J, Defrancq E, Elias B. Photo‐Oxidizing Ruthenium(II) Complexes with Enhanced Visible‐Light Absorption and G‐quadruplex DNA Binding Abilities. Chemistry 2022; 28:e202202251. [DOI: 10.1002/chem.202202251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Martin Gillard
- Université catholique de Louvain (UCLouvain) Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Guillaume Piraux
- Université catholique de Louvain (UCLouvain) Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Martin Daenen
- Université catholique de Louvain (UCLouvain) Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Michaël Abraham
- Université catholique de Louvain (UCLouvain) Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Ludovic Troian‐Gautier
- Université catholique de Louvain (UCLouvain) Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Laure Bar
- Université Grenoble Alpes (UGA) Département de Chimie Moléculaire, UMR CNRS 5250 CS 40700 - 38058 Grenoble France)
| | - Hugues Bonnet
- Université Grenoble Alpes (UGA) Département de Chimie Moléculaire, UMR CNRS 5250 CS 40700 - 38058 Grenoble France)
| | - Frédérique Loiseau
- Université Grenoble Alpes (UGA) Département de Chimie Moléculaire, UMR CNRS 5250 CS 40700 - 38058 Grenoble France)
| | - Hélène Jamet
- Université Grenoble Alpes (UGA) Département de Chimie Moléculaire, UMR CNRS 5250 CS 40700 - 38058 Grenoble France)
| | - Jérôme Dejeu
- Université Grenoble Alpes (UGA) Département de Chimie Moléculaire, UMR CNRS 5250 CS 40700 - 38058 Grenoble France)
| | - Eric Defrancq
- Université Grenoble Alpes (UGA) Département de Chimie Moléculaire, UMR CNRS 5250 CS 40700 - 38058 Grenoble France)
| | - Benjamin Elias
- Université catholique de Louvain (UCLouvain) Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
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3
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Understanding the role of ancillary ligands in the interaction of Ru(II) complexes with covalent arylamine-DNA adducts. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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4
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Dayanidhi PD, Vaidyanathan VG. Understanding the ancillary ligand effect on luminescent cyclometalated Ir(III) complex as a reporter for 2-acetylaminofluorene DNA(AAF-dG) adduct. J Biol Inorg Chem 2021; 27:189-199. [PMID: 34843001 DOI: 10.1007/s00775-021-01920-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/17/2021] [Indexed: 11/26/2022]
Abstract
Mutagenic agents such as aromatic amines undergo metabolic activation and produce DNA adducts at C8 position of guanine bases. N-2-acetylaminofluorene (AAF) generates different mutational outcomes when placed at G1, G2, and G3 of a NarI sequence (-G1G2CG3CC/T-). These outcomes are dictated by the conformations adopted by these adducts. Detection of such lesions is of considerable interest owing to their hazardous effects. Here, we report the synthesis of three cyclometalated [Ir(L)2dppz]+ complexes (L = 2-phenylpyridine (ppy) 1; benzo[h]quinoline (bhq) 2; 2-phenylquinoline (pq) 3; dppz = dipyrido[3,2-a:2',3'-c]phenazine) and their interaction with AAF adducted NarI DNA. Remarkably, complexes 1 and 2 displayed dominant 3LC transition characteristic of polar environment despite binding to the adducted sites. On the other hand, complex 3 binds to NarI sequences and behaves as a luminescent reporter for AAF-modified DNA. The results reported here emphasize that molecular light switching phenomenon can be stimulated by switching ancillary ligands and might act as potential probes for covalent-DNA defects.
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Affiliation(s)
- P David Dayanidhi
- Advanced Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, 600020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - V G Vaidyanathan
- Advanced Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai, 600020, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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5
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Dayanidhi PD, Vaidyanathan VG. Structural insights into the recognition of DNA defects by small molecules. Dalton Trans 2021; 50:5691-5712. [PMID: 33949406 DOI: 10.1039/d0dt04289g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Studies on the binding interaction of small molecules and nucleic acids have been explored for their biological applications. With excellent photophysical/chemical properties, numerous metal complexes have been studied as structural probes for nucleic acids. The recognition of DNA defects is of high importance due to their association with various types of cancers. Small molecules that target DNA defects in a specific and selective manner offer a new avenue for developing novel drugs and diagnostic tools. Transition metal complexes have been studied as probes for abasic sites and DNA/RNA mismatches. By changing the ligand structure or metal center, the probing efficiency of the metal complexes varies towards the defects. In this perspective, we have discussed mainly the structural requirement of metal complexes as probes for abasic sites, mismatches, and covalent DNA adducts, followed by the challenges and future directions.
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Affiliation(s)
- P David Dayanidhi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India. and Advanced Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - V G Vaidyanathan
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India. and Advanced Materials Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
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6
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Zamora A, Wachter E, Vera M, Heidary DK, Rodríguez V, Ortega E, Fernández-Espín V, Janiak C, Glazer EC, Barone G, Ruiz J. Organoplatinum(II) Complexes Self-Assemble and Recognize AT-Rich Duplex DNA Sequences. Inorg Chem 2021; 60:2178-2187. [PMID: 33502194 PMCID: PMC8456496 DOI: 10.1021/acs.inorgchem.0c02648] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
![]()
The
specific recognition of AT-rich DNA sequences opens up the
door to promising diagnostic and/or therapeutic strategies against
gene-related diseases. Here, we demonstrate that amphiphilic PtII complexes of the type [Pt(dmba)(N∧N)]NO3 (dmba = N,N-dimethylbenzylamine-κN, κC; N∧N = dpq (3), dppz (4), and dppn (5)) recognize AT-rich
oligonucleotides over other types of DNA, RNA, and model proteins.
The crystal structure of 4 shows the presence of significant
π-stacking interactions and a distorted coordination sphere
of the d8 PtII atom. Complex 5,
containing the largest π-conjugated ligand, forms supramolecular
assemblies at high concentrations under aqueous environment. However,
its aggregation can be promoted in the presence of DNA at concentrations
as low as 10 μM in a process that “turns on” its
excimer emission around 600 nm. Viscometry, gel electrophoresis, and
theoretical calculations demonstrate that 5 binds to
minor groove when self-assembled, while the monomers of 3 and 4 intercalate into the DNA. The complexes also
inhibit cancer cell growth with low-micromolar IC50 values
in 2D tissue culture and suppress tumor growth in 3D tumor spheroids
with a multicellular resistance (MCR) index comparable to that of
cisplatin. Cyclometalated PtII complexes
containing π-conjugated
ligands form supramolecular assemblies under aqueous environment,
and DNA-induced aggregation occurs for the one containing the highest
conjugated N,N-diimine ligand. The complexes recognize
AT-rich DNA sequences over others in DNA, RNA, and proteins. Their
DNA binding mode switches from intercalation to minor groove binding
when self-assembled. The complexes suppress tumor growth in 3D tumor
spheroids.
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Affiliation(s)
- Ana Zamora
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain
| | - Erin Wachter
- Department of Chemistry, University of Kentucky 505 Rose Street, Lexington, Kentucky 40506, United States
| | - María Vera
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain
| | - David K Heidary
- Department of Chemistry, University of Kentucky 505 Rose Street, Lexington, Kentucky 40506, United States
| | - Venancio Rodríguez
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain
| | - Enrique Ortega
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain
| | | | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, D-40204 Düsseldorf, Germany
| | - Edith C Glazer
- Department of Chemistry, University of Kentucky 505 Rose Street, Lexington, Kentucky 40506, United States
| | - Giampaolo Barone
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università di Palermo, 90128 Palermo, Italy
| | - José Ruiz
- Departamento de Química Inorgánica, Universidad de Murcia, and Biomedical Research Institute of Murcia (IMIB-Arrixaca), E-30071 Murcia, Spain
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7
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Gillard M, Weynand J, Bonnet H, Loiseau F, Decottignies A, Dejeu J, Defrancq E, Elias B. Flexible Ru
II
Schiff Base Complexes: G‐Quadruplex DNA Binding and Photo‐Induced Cancer Cell Death. Chemistry 2020; 26:13849-13860. [DOI: 10.1002/chem.202001409] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/28/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Martin Gillard
- 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
| | - 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
- Département de Chimie Moléculaire UMR CNRS 5250 Université Grenoble Alpes (UGA) CS 40700-38058 Grenoble France
| | - Hugues Bonnet
- Département de Chimie Moléculaire UMR CNRS 5250 Université Grenoble Alpes (UGA) CS 40700-38058 Grenoble France
| | - Frédérique Loiseau
- Département de Chimie Moléculaire UMR CNRS 5250 Université Grenoble Alpes (UGA) CS 40700-38058 Grenoble France
| | - Anabelle Decottignies
- Université catholique de Louvain (UCLouvain) de Duve Institute Avenue Hippocrate 75 1200 Brussels Belgium
| | - Jérôme Dejeu
- Département de Chimie Moléculaire UMR CNRS 5250 Université Grenoble Alpes (UGA) CS 40700-38058 Grenoble France
| | - Eric Defrancq
- Département de Chimie Moléculaire UMR CNRS 5250 Université Grenoble Alpes (UGA) CS 40700-38058 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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8
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Vanderlinden W, Kolbeck PJ, Frederickx W, Konrad SF, Nicolaus T, Lampe C, Urban AS, Moucheron C, Lipfert J. Ru(TAP)32+ uses multivalent binding to accelerate and constrain photo-adduct formation on DNA. Chem Commun (Camb) 2019; 55:8764-8767. [PMID: 31139806 DOI: 10.1039/c9cc02838b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Ru(ii)-complexes with polyazaaromatic ligands can undergo direct electron transfer with guanine nucleobases on blue light excitation that results in DNA lesions with phototherapeutic potential. Here we use single molecule approaches to demonstrate DNA binding mode heterogeneity and evaluate how multivalent binding governs the photochemistry of [Ru(TAP)3]2+ (TAP = 1,4,5,8-tetraazaphenanthrene).
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Affiliation(s)
- Willem Vanderlinden
- Department of Physics, Nanosystems Initiative Munich, and Center for NanoScience, LMU Munich, Amalienstrasse 54, 80799 Munich, Germany
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9
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Gillard M, Laramée-Milette B, Deraedt Q, Hanan GS, Loiseau F, Dejeu J, Defrancq E, Elias B, Marcélis L. Photodetection of DNA mismatches by dissymmetric Ru(ii) acridine based complexes. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00133f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Favored radiative deactivation processes in dissymmetric Ru(ii) complexes enable photodetection of DNA mismatches.
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Affiliation(s)
- Martin Gillard
- Institute of Condensed Matter and Nanosciences (IMCN)
- Molecular Chemistry
- Materials and Catalysis (MOST)
- Université catholique de Louvain (UCLouvain)
- B-1348 Louvain-la-Neuve
| | | | - Quentin Deraedt
- Institute of Condensed Matter and Nanosciences (IMCN)
- Molecular Chemistry
- Materials and Catalysis (MOST)
- Université catholique de Louvain (UCLouvain)
- B-1348 Louvain-la-Neuve
| | - Garry S. Hanan
- Departement de Chimie
- Université de Montréal
- Montréal
- Canada
| | - Fredérique Loiseau
- Département de Chimie Moléculaire
- Université Grenoble-Alpes (UGA)
- 38058 Grenoble
- France
| | - Jérôme Dejeu
- Département de Chimie Moléculaire
- Université Grenoble-Alpes (UGA)
- 38058 Grenoble
- France
| | - Eric Defrancq
- Département de Chimie Moléculaire
- Université Grenoble-Alpes (UGA)
- 38058 Grenoble
- France
| | - Benjamin Elias
- Institute of Condensed Matter and Nanosciences (IMCN)
- Molecular Chemistry
- Materials and Catalysis (MOST)
- Université catholique de Louvain (UCLouvain)
- B-1348 Louvain-la-Neuve
| | - Lionel Marcélis
- Institute of Condensed Matter and Nanosciences (IMCN)
- Molecular Chemistry
- Materials and Catalysis (MOST)
- Université catholique de Louvain (UCLouvain)
- B-1348 Louvain-la-Neuve
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10
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Weynand J, Diman A, Abraham M, Marcélis L, Jamet H, Decottignies A, Dejeu J, Defrancq E, Elias B. Towards the Development of Photo‐Reactive Ruthenium(II) Complexes Targeting Telomeric G‐Quadruplex DNA. Chemistry 2018; 24:19216-19227. [DOI: 10.1002/chem.201804771] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/22/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Justin Weynand
- Université catholique de Louvain (UCLouvain)Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
- Université Grenoble-Alpes (UGA)Département de Chimie Moléculaire, UMR CNRS 5250, CS 40700 38058 Grenoble France
| | - Aurélie Diman
- Université catholique de Louvain (UCLouvain) de Duve Institute Avenue Hippocrate 75 1200 Brussels Belgium
| | - Michaël Abraham
- Université catholique de Louvain (UCLouvain)Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Lionel Marcélis
- Université catholique de Louvain (UCLouvain)Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Hélène Jamet
- Université Grenoble-Alpes (UGA)Département de Chimie Moléculaire, UMR CNRS 5250, CS 40700 38058 Grenoble France
| | - Anabelle Decottignies
- Université catholique de Louvain (UCLouvain) de Duve Institute Avenue Hippocrate 75 1200 Brussels Belgium
| | - Jérôme Dejeu
- Université Grenoble-Alpes (UGA)Département de Chimie Moléculaire, UMR CNRS 5250, CS 40700 38058 Grenoble France
| | - Eric Defrancq
- Université Grenoble-Alpes (UGA)Département de Chimie Moléculaire, UMR CNRS 5250, CS 40700 38058 Grenoble France
| | - Benjamin Elias
- Université catholique de Louvain (UCLouvain)Institut de la Matière Condensée et des Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis (MOST) Place Louis Pasteur 1, bte L4.01.02 1348 Louvain-la-Neuve Belgium
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11
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Kajouj S, Marcelis L, Mattiuzzi A, Grassin A, Dufour D, Van Antwerpen P, Boturyn D, Defrancq E, Surin M, De Winter J, Gerbaux P, Jabin I, Moucheron C. Synthesis and photophysical studies of a multivalent photoreactive Ru II-calix[4]arene complex bearing RGD-containing cyclopentapeptides. Beilstein J Org Chem 2018; 14:1758-1768. [PMID: 30112081 PMCID: PMC6071717 DOI: 10.3762/bjoc.14.150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 06/21/2018] [Indexed: 01/09/2023] Open
Abstract
Photoactive ruthenium-based complexes are actively studied for their biological applications as potential theragnostic agents against cancer. One major issue of these inorganic complexes is to penetrate inside cells in order to fulfil their function, either sensing the internal cell environment or exert a photocytotoxic activity. The use of lipophilic ligands allows the corresponding ruthenium complexes to passively diffuse inside cells but limits their structural and photophysical properties. Moreover, this strategy does not provide any cell selectivity. This limitation is also faced by complexes anchored on cell-penetrating peptides. In order to provide a selective cell targeting, we developed a multivalent system composed of a photoreactive ruthenium(II) complex tethered to a calix[4]arene platform bearing multiple RGD-containing cyclopentapeptides. Extensive photophysical and photochemical characterizations of this Ru(II)–calixarene conjugate as well as the study of its photoreactivity in the presence of guanosine monophosphate have been achieved. The results show that the ruthenium complex should be able to perform efficiently its photoinduced cytotoxic activity, once incorporated into targeted cancer cells thanks to the multivalent platform.
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Affiliation(s)
- Sofia Kajouj
- Laboratoire de Chimie Organique et Photochimie, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 160/08, 1050 Bruxelles, Belgium
| | - Lionel Marcelis
- Laboratoire de Chimie Organique et Photochimie, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 160/08, 1050 Bruxelles, Belgium.,Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Université libre de Bruxelles (ULB), Avenue F.D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium
| | - Alice Mattiuzzi
- Laboratoire de Chimie Organique, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 160/06, 1050 Bruxelles, Belgium
| | - Adrien Grassin
- Université Grenoble Alpes, Département de Chimie Moléculaire UMR CNRS 5250, CS 40700, 38058 Grenoble Cedex 09, France
| | - Damien Dufour
- Analytical Platform of the Faculty of Pharmacy, Université libre de Bruxelles, Boulevard du Triomphe, Campus de la Plaine, CP205/05, 1050 Bruxelles, Belgium
| | - Pierre Van Antwerpen
- Analytical Platform of the Faculty of Pharmacy, Université libre de Bruxelles, Boulevard du Triomphe, Campus de la Plaine, CP205/05, 1050 Bruxelles, Belgium
| | - Didier Boturyn
- Université Grenoble Alpes, Département de Chimie Moléculaire UMR CNRS 5250, CS 40700, 38058 Grenoble Cedex 09, France
| | - Eric Defrancq
- Université Grenoble Alpes, Département de Chimie Moléculaire UMR CNRS 5250, CS 40700, 38058 Grenoble Cedex 09, France
| | - Mathieu Surin
- Laboratory for Chemistry of Novel Materials, Center for Innovation and Research in Materials and Polymers, University of Mons - UMONS, 20, Place du Parc, B-7000 Mons, Belgium
| | - Julien De Winter
- Organic synthesis and Mass Spectrometry Laboratory, University of Mons - UMONS, Place du Parc 23, B-7000 Mons, Belgium
| | - Pascal Gerbaux
- Organic synthesis and Mass Spectrometry Laboratory, University of Mons - UMONS, Place du Parc 23, B-7000 Mons, Belgium
| | - Ivan Jabin
- Laboratoire de Chimie Organique, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 160/06, 1050 Bruxelles, Belgium
| | - Cécile Moucheron
- Laboratoire de Chimie Organique et Photochimie, Université libre de Bruxelles, Avenue F.D. Roosevelt 50, CP 160/08, 1050 Bruxelles, Belgium
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Bevernaegie R, Marcélis L, Laramée-Milette B, De Winter J, Robeyns K, Gerbaux P, Hanan GS, Elias B. Trifluoromethyl-Substituted Iridium(III) Complexes: From Photophysics to Photooxidation of a Biological Target. Inorg Chem 2018; 57:1356-1367. [PMID: 29336560 DOI: 10.1021/acs.inorgchem.7b02778] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Photodynamic therapeutic agents are of key interest in developing new strategies to develop more specific and efficient anticancer treatments. In comparison to classical chemotherapeutic agents, the activity of photodynamic therapeutic compounds can be finely controlled thanks to the light triggering of their photoreactivity. The development of type I photosensitizing agents, which do not rely on the production of ROS, is highly desirable. In this context, we developed new iridium(III) complexes which are able to photoreact with biomolecules; namely, our Ir(III) complexes can oxidize guanine residues under visible light irradiation. We report the synthesis and extensive photophysical characterization of four new Ir(III) complexes, [Ir(ppyCF3)2(N^N)]+ [ppyCF3 = 2-(3,5-bis(trifluoromethyl)phenyl)pyridine) and N^N = 2,2'-dipyridyl (bpy); 2-(pyridin-2-yl)pyrazine (pzpy); 2,2'-bipyrazine (bpz); 1,4,5,8-tetraazaphenanthrene (TAP)]. In addition to an extensive experimental and theoretical study of the photophysics of these complexes, we characterize their photoreactivity toward model redox-active targets and the relevant biological target, the guanine base. We demonstrate that photoinduced electron transfer takes place between the excited Ir(III) complex and guanine which leads to the formation of stable photoproducts, indicating that the targeted guanine is irreversibly damaged. These results pave the way to the elaboration of new type I photosensitizers for targeting cancerous cells.
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Affiliation(s)
- Robin Bevernaegie
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Lionel Marcélis
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Baptiste Laramée-Milette
- Département de Chimie, Université de Montréal , Pavillon J.-A. Bombardier, 5155 Chemin de la Rampe, Montréal, Québec H3T 2B1, Canada
| | - Julien De Winter
- Organic Synthesis and Mass Spectrometry Laboratory, University of Mons - UMons , 23 Place du Parc, B-7000 Mons, Belgium
| | - Koen Robeyns
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
| | - Pascal Gerbaux
- Organic Synthesis and Mass Spectrometry Laboratory, University of Mons - UMons , 23 Place du Parc, B-7000 Mons, Belgium
| | - Garry S Hanan
- Département de Chimie, Université de Montréal , Pavillon J.-A. Bombardier, 5155 Chemin de la Rampe, Montréal, Québec H3T 2B1, Canada
| | - Benjamin Elias
- Université catholique de Louvain (UCL) , Institut de la Matière Condensée et des Nanosciences (IMCN), Place Louis Pasteur, 1 box L4.01.02, B-1348 Louvain-la-Neuve, Belgium
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