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Ma TZ, Liu LY, Zeng YL, Ding K, Zhang H, Liu W, Cao Q, Xia W, Xiong X, Wu C, Mao ZW. G-quadruplex-guided cisplatin triggers multiple pathways in targeted chemotherapy and immunotherapy. Chem Sci 2024; 15:9756-9774. [PMID: 38939132 PMCID: PMC11206235 DOI: 10.1039/d4sc00643g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Accepted: 05/09/2024] [Indexed: 06/29/2024] Open
Abstract
G-quadruplexes (G4s) are atypical nucleic acid structures involved in basic human biological processes and are regulated by small molecules. To date, pyridostatin and its derivatives [e.g., PyPDS (4-(2-aminoethoxy)-N 2,N 6-bis(4-(2-(pyrrolidin-1-yl) ethoxy) quinolin-2-yl) pyridine-2,6-dicarboxamide)] are the most widely used G4-binding small molecules and considered to have the best G4 specificity, which provides a new option for the development of cisplatin-binding DNA. By combining PyPDS with cisplatin and its analogs, we synthesize three platinum complexes, named PyPDSplatins. We found that cisplatin with PyPDS (CP) exhibits stronger specificity for covalent binding to G4 domains even in the presence of large amounts of dsDNA compared with PyPDS either extracellularly or intracellularly. Multiomics analysis reveals that CP can effectively regulate G4 functions, directly damage G4 structures, activate multiple antitumor signaling pathways, including the typical cGAS-STING pathway and AIM2-ASC pathway, trigger a strong immune response and lead to potent antitumor effects. These findings reflect that cisplatin-conjugated specific G4 targeting groups have antitumor mechanisms different from those of classic cisplatin and provide new strategies for the antitumor immunity of metals.
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Affiliation(s)
- Tian-Zhu Ma
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Liu-Yi Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - You-Liang Zeng
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Ke Ding
- The Second Affiliated Hospital & Liangzhu Laboratory, Zhejiang University School of Medicine Hangzhou 311121 P. R. China
| | - Hang Zhang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Wenting Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Qian Cao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Wei Xia
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Xushen Xiong
- The Second Affiliated Hospital & Liangzhu Laboratory, Zhejiang University School of Medicine Hangzhou 311121 P. R. China
| | - Chao Wu
- Department of Neurology, The First Affiliated Hospital, Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Sun Yat-sen University Guangzhou 510080 P. R. China
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, IGCME, GBRCE for Functional Molecular Engineering, Sun Yat-Sen University Guangzhou 510275 P. R. China
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2
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Tang J, Yang Y, Yin HY, Ma B, Zhu M, Yang ZS, Peng XX, Jia F, Zhao Y, Wang F, Chen T, Zhang JL. A Platinum-Aluminum Bimetallic Salen Complex for Pro-senescence Cancer Therapy. Chembiochem 2024; 25:e202400105. [PMID: 38639074 DOI: 10.1002/cbic.202400105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/02/2024] [Accepted: 04/17/2024] [Indexed: 04/20/2024]
Abstract
Cell senescence is defined as irreversible cell cycle arrest, which can be triggered by telomere shortening or by various types of genotoxic stress. Induction of senescence is emerging as a new strategy for the treatment of cancer, especially when sequentially combined with a second senolytic drug capable of killing the resulting senescent cells, however severely suffering from the undesired off-target side effects from the senolytic drugs. Here, we prepare a bimetalic platinum-aluminum salen complex (Alumiplatin) for cancer therapy-a combination of pro-senesence chemotherapy with in situ senotherapy to avoid the side effects. The aluminum salen moiety, as a G-quadruplex stabilizer, enhances the salen's ability to induce cancer cell senescence and this phenotype is in turn sensitive to the cytotoxic activity of the monofunctional platinum moiety. It exhibits an excellent capability for inducing senescence, a potent cytotoxic activity against cancer cells both in vitro and in vivo, and an improved safety profile compared to cisplatin. Therefore, Alumiplatin may be a good candidate to be further developed into safe and effective anticancer agents. This novel combination of cell senescence inducers with genotoxic drugs revolutionizes the therapy options of designing multi-targeting anticancer agents to improve the efficacy of anticancer therapies.
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Affiliation(s)
- Juan Tang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Key Laboratory of Medicinal Molecule Science and pharmaceutics Engineering, Ministry of Industry and Information Technology, Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, P. R. China
| | - Yahui Yang
- Department of Chemistry, Jinan University, Guangzhou, 510632, P. R. China
| | - Hao-Yan Yin
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Bin Ma
- Department of Chemistry, Jinan University, Guangzhou, 510632, P. R. China
| | - Mengliang Zhu
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Zi-Shu Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Xin-Xin Peng
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Feifei Jia
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, National Centre for Mass Spectrometry in Beijing, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Yao Zhao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, National Centre for Mass Spectrometry in Beijing, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Fuyi Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, National Centre for Mass Spectrometry in Beijing, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Tianfeng Chen
- Department of Chemistry, Jinan University, Guangzhou, 510632, P. R. China
| | - Jun-Long Zhang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
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3
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Huynh M, Vinck R, Gibert B, Gasser G. Strategies for the Nuclear Delivery of Metal Complexes to Cancer Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2311437. [PMID: 38174785 DOI: 10.1002/adma.202311437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/20/2023] [Indexed: 01/05/2024]
Abstract
The nucleus is an essential organelle for the function of cells. It holds most of the genetic material and plays a crucial role in the regulation of cell growth and proliferation. Since many antitumoral therapies target nucleic acids to induce cell death, tumor-specific nuclear drug delivery could potentiate therapeutic effects and prevent potential off-target side effects on healthy tissue. Due to their great structural variety, good biocompatibility, and unique physico-chemical properties, organometallic complexes and other metal-based compounds have sparked great interest as promising anticancer agents. In this review, strategies for specific nuclear delivery of metal complexes are summarized and discussed to highlight crucial parameters to consider for the design of new metal complexes as anticancer drug candidates. Moreover, the existing opportunities and challenges of tumor-specific, nucleus-targeting metal complexes are emphasized to outline some new perspectives and help in the design of new cancer treatments.
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Affiliation(s)
- Marie Huynh
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry of Life and Health Sciences, Laboratory for Inorganic Chemistry, Paris, F-75005, France
- Gastroenterology and technologies for Health, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS5286, Université Lyon 1, Lyon, 69008, France
| | - Robin Vinck
- Orano, 125 avenue de Paris, Châtillon, 92320, France
| | - Benjamin Gibert
- Gastroenterology and technologies for Health, Centre de Recherche en Cancérologie de Lyon, INSERM U1052-CNRS5286, Université Lyon 1, Lyon, 69008, France
| | - Gilles Gasser
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry of Life and Health Sciences, Laboratory for Inorganic Chemistry, Paris, F-75005, France
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4
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Wang LJ, Liu WJ, Wang LY, Ho YP, Han Y, Li DL, Zhang CY. Construction of an Enzymatically Controlled DNA Nanomachine for One-Step Imaging of Telomerase in Living Cells. Anal Chem 2024; 96:4647-4656. [PMID: 38441540 DOI: 10.1021/acs.analchem.3c05795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Telomerase is a basic reverse transcriptase that maintains the telomere length in cells, and accurate and specific sensing of telomerase in living cells is critical for medical diagnostics and disease therapeutics. Herein, we demonstrate for the first time the construction of an enzymatically controlled DNA nanomachine with endogenous apurinic/apyrimidinic endonuclease 1 (APE1) as a driving force for one-step imaging of telomerase in living cells. The DNA nanomachine is designed by rational engineering of substrate probes and reporter probes embedded with an enzyme-activatable site (i.e., AP site) and their subsequent assembly on a gold nanoparticle (AuNP). Upon recognition and cleavage of the AP site in the substrate probe by APE1, the loop of the substrate probe unfolds, exposing telomeric primer (TP) with the 3'-OH end. Subsequently, the TP is elongated by telomerase at the 3'-OH end to generate a long telomeric product. The resultant telomeric product acts as a swing arm that can hybridize with a reporter probe to initiate the APE1-powered walking reaction, ultimately generating a significantly enhanced fluorescence signal. Notably, endogenous APE1 is used as the driving force of the DNA nanomachine, avoiding the introduction of exogenous auxiliary cofactors into the cellular microenvironment. Owing to the high kinetics and high amplification efficiency of the APE1-powered DNA nanomachine, this strategy enables one-step sensitive sensing of telomerase in vitro and in vivo. It can successfully discriminate telomerase activity between cancer cells and normal cells, screen telomerase inhibitors, and monitor the variations of telomerase activity in living cells, offering a prospective platform for molecular diagnostics and drug discovery.
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Affiliation(s)
- Li-Juan Wang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Wen-Jing Liu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Lu-Yao Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
| | - Yi-Ping Ho
- Department of Biomedical Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Yun Han
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Dong-Ling Li
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Chun-Yang Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
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5
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Robinson J, Stenspil SG, Maleckaite K, Bartlett M, Di Antonio M, Vilar R, Kuimova MK. Cellular Visualization of G-Quadruplex RNA via Fluorescence- Lifetime Imaging Microscopy. J Am Chem Soc 2024; 146:1009-1018. [PMID: 38151240 PMCID: PMC10786036 DOI: 10.1021/jacs.3c11908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/29/2023]
Abstract
Over the past decade, appreciation of the roles of G-quadruplex (G4) structures in cellular regulation and maintenance has rapidly grown, making the establishment of robust methods to visualize G4s increasingly important. Fluorescent probes are commonly used for G4 detection in vitro; however, achieving sufficient selectivity to detect G4s in a dense and structurally diverse cellular environment is challenging. The use of fluorescent probes for G4 detection is further complicated by variations of probe uptake into cells, which may affect fluorescence intensity independently of G4 abundance. In this work, we report an alternative small-molecule approach to visualize G4s that does not rely on fluorescence intensity switch-on and, thus, does not require the use of molecules with exclusive G4 binding selectivity. Specifically, we have developed a novel thiazole orange derivative, TOR-G4, that exhibits a unique fluorescence lifetime when bound to G4s compared to other structures, allowing G4 binding to be sensitively distinguished from non-G4 binding, independent of the local probe concentration. Furthermore, TOR-G4 primarily colocalizes with RNA in the cytoplasm and nucleoli of cells, making it the first lifetime-based probe validated for exploring the emerging roles of RNA G4s in cellulo.
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Affiliation(s)
- Jenna Robinson
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
- The
Francis Crick Institute, 1 Midland Road, London NW1 1AT, U.K.
| | - Stine G. Stenspil
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
| | - Karolina Maleckaite
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
| | - Molly Bartlett
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
| | - Marco Di Antonio
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
- The
Francis Crick Institute, 1 Midland Road, London NW1 1AT, U.K.
| | - Ramon Vilar
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
| | - Marina K. Kuimova
- Department
of Chemistry, Molecular Science Research Hub, Imperial College London, 82 Wood Lane, London W12
0BZ, U.K.
- Molecular
Science Research Hub, Institute of Chemical
Biology, 82 Wood Lane, London W12 0BZ, U.K.
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6
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Berrones Reyes J, Sherin PS, Sarkar A, Kuimova MK, Vilar R. Platinum(II)-Based Optical Probes for Imaging Quadruplex DNA Structures via Phosphorescence Lifetime Imaging Microscopy. Angew Chem Int Ed Engl 2023; 62:e202310402. [PMID: 37642538 PMCID: PMC10952808 DOI: 10.1002/anie.202310402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 08/31/2023]
Abstract
G-quadruplex DNA is a non-canonical structure that forms in guanine-rich regions of the genome. There is increasing evidence showing that G-quadruplexes have important biological functions, and therefore molecular tools to visualise these structures are important. Herein we report on a series of new cyclometallated platinum(II) complexes which, upon binding to G-quadruplex DNA, display an increase in their phosphorescence, acting as switch-on probes. More importantly, upon binding to G-quadruplexes they display a selective and distinct lengthening of their emission lifetime. We show that this effect can be used to selectively visualise these structures in cells using Phosphorescence Lifetime Imaging Microscopy (PLIM).
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Affiliation(s)
- Jessica Berrones Reyes
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Peter S. Sherin
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Amrita Sarkar
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Marina K. Kuimova
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Ramon Vilar
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
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7
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Berrones Reyes J, Sherin PS, Sarkar A, Kuimova MK, Vilar R. Platinum(II)-Based Optical Probes for Imaging Quadruplex DNA Structures via Phosphorescence Lifetime Imaging Microscopy. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 135:e202310402. [PMID: 38516271 PMCID: PMC10952342 DOI: 10.1002/ange.202310402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Indexed: 03/23/2024]
Abstract
G-quadruplex DNA is a non-canonical structure that forms in guanine-rich regions of the genome. There is increasing evidence showing that G-quadruplexes have important biological functions, and therefore molecular tools to visualise these structures are important. Herein we report on a series of new cyclometallated platinum(II) complexes which, upon binding to G-quadruplex DNA, display an increase in their phosphorescence, acting as switch-on probes. More importantly, upon binding to G-quadruplexes they display a selective and distinct lengthening of their emission lifetime. We show that this effect can be used to selectively visualise these structures in cells using Phosphorescence Lifetime Imaging Microscopy (PLIM).
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Affiliation(s)
- Jessica Berrones Reyes
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Peter S. Sherin
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Amrita Sarkar
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Marina K. Kuimova
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
| | - Ramon Vilar
- Department of ChemistryImperial College LondonWhite City Campus82 Wood LaneLondonW12 0BZUK
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8
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Assadawi N, Richardson C, Ralph SF. G-quadruplex DNA binding properties of novel nickel Schiff base complexes with four pendant groups. Dalton Trans 2023; 52:12646-12660. [PMID: 37622418 DOI: 10.1039/d3dt02040a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Three new nickel Schiff base complexes were prepared using a two-step procedure that involves initial selective dialkylation of 2,4,6-trihydroxybenzaldehyde, followed by reaction with 1,2-phenylenediamine and nickel(II) acetate. Each of the complexes possessed the same Schiff base core but differed in the identity of the four pendant groups. All complexes were characterised by microanalysis, NMR spectroscopy and ESI mass spectrometry. In addition, two of the complexes were also characterised in the solid state using X-ray crystallography, which confirmed the presence of a square planar geometry around the metal ion. The DNA binding properties of the three nickel complexes with double stranded DNA and a range of G-quadruplex DNA structures were explored using ESI mass spectrometry, CD spectroscopy, UV melting curves, Fluorescence Resonance Energy Transfer (FRET) assays, Fluorescent Indicator Displacement (FID) assays and molecular docking studies. These techniques confirmed the ability of the three nickel complexes to bind to most of the DNA molecules examined, as well as stabilise the latter in several instances. In addition, the results of these investigations provided evidence that pendant groups with morpholine rings generally reduced DNA binding behaviour, whilst pendants featuring piperidine ring systems attached to the Schiff base core by three and not two methylene linkers often showed the greatest extent of binding or DNA stabilisation.
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Affiliation(s)
- Nawal Assadawi
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia.
| | - Christopher Richardson
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia.
| | - Stephen F Ralph
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia.
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9
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Villaman D, Vega A, Santa Maria de la Parra L, León IE, Levín P, Toro PM. Anticancer activity of Ni(II) and Zn(II) complexes based on new unsymmetrical salophen-type ligands: synthesis, characterization and single-crystal X-ray diffraction. Dalton Trans 2023; 52:10855-10868. [PMID: 37486008 DOI: 10.1039/d3dt00800b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
The discovery of new coordination compounds with anticancer properties is an active field of research due to the severe side effects of platinum-based compounds currently used in chemotherapy. In the search for new agents for the treatment of cancer, unsymmetrical N2O2-tetradentate ligand (H2L1 and H2L2) and their Ni(II) and Zn(II) asymmetric complexes (NiII-L1-2 and ZnII-L1-2) have been synthesized and fully characterized. 1H NMR studies revealed that the ligands and complexes were stable in mixtures of DMSO : D2O (9 : 1). Complementary UV-Vis studies confirmed that ZnII derivatives also exhibit high stability in mixtures DMSO : buffer (6 : 4) after 24 h. Single-crystal X-ray diffraction studies confirmed the molecular structures of H2L1, H2L2, NiII-L1, and NiII-L2. At the molecular level, complexes were completely planar without significant distortions of the square-planar geometry according to τ4 parameter. Furthermore, the crystalline structures revealed non-classical intermolecular interactions of the C-H⋯O and the Ni⋯Ni type. The ligands and complexes were screened against the human osteosarcoma (MG-63), human colon cancer (HCT-116), breast cancer (MDA-MB-231) cell lines, and non-cancerous cells (L929). H2L1 and H2L2 ligands not caused cytotoxic effects at a concentration of 100 μM, while NiII-L2, ZnII-L1, and ZnII-L2 complexes induce cytotoxic effects in all cell lines. NiII-L2 was a more active complex against MG-63 (3.9 ± 1.5) and HCT-116 (3.4 ± 1.7) cell lines with IC50 values in the low micromolar range. In addition, this compound was 10-, 5-, and 11-fold more potent than cisplatin in MG-63 (39 ± 1.8), HCT-116 (17.2), and MDA-MB-231 (131 ± 18), respectively. Three complexes exhibited great selectivity for tumoral cells with SI values ranging from 1.6 to 7.4.
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Affiliation(s)
- David Villaman
- Laboratorio de Química Inorgánica y Organometálica, Facultad de Cs. Química, Universidad de Concepción, Chile.
| | - Andrés Vega
- Universidad Andrés Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Av. República 498, Santiago, Chile
| | - Lucía Santa Maria de la Parra
- CEQUINOR (UNLP, CCT-CONICET La Plata, Asociado a CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, La Plata 1900, Argentina
| | - Ignacio E León
- CEQUINOR (UNLP, CCT-CONICET La Plata, Asociado a CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, La Plata 1900, Argentina
- Cátedra de Fisiopatología, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, La Plata 1900, Argentina
| | - Pedro Levín
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Santiago, Chile
| | - Patricia M Toro
- Instituto de Ciencias Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Talca, Chile.
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10
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Li Q, Yang J, Yu W, He L, Zhou R, Nie C, Liao L, Xiao X. Two Fe(III)/Eu(III) Salophen complex-based optical sensors for determination of organophosphorus pesticide monocrotophos. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:2334-2342. [PMID: 37140268 DOI: 10.1039/d3ay00255a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Monocrotophos (MP), an organophosphorus pesticide, poses a serious threat to human health, so a rapid and simple technique is needed to detect it. In this study, two novel optical sensors for MP detection were created using the Fe(III) Salophen complex and Eu(III) Salophen complex, respectively. One sensor is an Fe(III) Salophen complex (I-N-Sal), which can bind MP selectively and form a supramolecule, resulting in a strong resonance light scattering (RLS) signal at 300 nm. Under the optimum conditions, the detection limit was 30 nM, the linear range was 0.1-1.1 μM, the correlation coefficient R2 = 0.9919, and the recovery rate range was 97.0-103.1%. Interaction properties between the sensor I-N-Sal and MP and the RLS mechanism were investigated using density functional theory (DFT). And another sensor is based on the Eu(III) Salophen complex and 5-aminofluorescein derivatives. The Eu(III) Salophen complex was immobilized on the surface of amino-silica gel (Sigel-NH2) particles as the solid phase receptor (ESS) of MP and 5-aminofluorescein derivatives as the fluorescent (FL)-labeled receptor (N-5-AF) of MP, which can selectively bind the MP and form a sandwich-type supramolecule. Under the optimum conditions, the detection limit was 0.4 μM, the linear range was 1.3-7.0 μM, the correlation coefficient R2 = 0.9983, and the recovery rate range was 96.6-101.1%. Interaction properties between the sensor and MP were investigated by UV-vis, FT-IR, and XRD. Both sensors were successfully applied to the determination of MP content in tap water and camellia.
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Affiliation(s)
- Qian Li
- School of Chemistry and Chemical Engineering, Hunan Province Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, P. R. China
| | - Jing Yang
- Hengyang Market Supervision, Inspection and Testing Center, Hengyang City 421001, P. R. China
| | - Wenzhan Yu
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang 421001, P. R. China
| | - Liqiong He
- Department of Public Health and Laboratory Science, School of Public Health, University of South China, Hengyang 421001, P. R. China
| | - Renlong Zhou
- Department of Public Health and Laboratory Science, School of Public Health, University of South China, Hengyang 421001, P. R. China
| | - Changming Nie
- School of Chemistry and Chemical Engineering, Hunan Province Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, P. R. China
| | - Lifu Liao
- School of Chemistry and Chemical Engineering, Hunan Province Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, P. R. China
| | - Xilin Xiao
- School of Chemistry and Chemical Engineering, Hunan Province Key Laboratory for the Design and Application of Actinide Complexes, University of South China, Hengyang 421001, P. R. China
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, China.
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11
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Kench T, Rakers V, Bouzada D, Gomez-González J, Robinson J, Kuimova MK, Vázquez López M, Vázquez ME, Vilar R. Dimeric Metal-Salphen Complexes Which Target Multimeric G-Quadruplex DNA. Bioconjug Chem 2023; 34:911-921. [PMID: 37119235 DOI: 10.1021/acs.bioconjchem.3c00114] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
G-Quadruplex DNA structures have attracted increasing attention due to their biological roles and potential as targets for the development of new drugs. While most guanine-rich sequences in the genome have the potential to form monomeric G-quadruplexes, certain sequences have enough guanine-tracks to give rise to multimeric quadruplexes. One of these sequences is the human telomere where tandem repeats of TTAGGG can lead to the formation of two or more adjacent G-quadruplexes. Herein we report on the modular synthesis via click chemistry of dimeric metal-salphen complexes (with NiII and PtII) bridged by either polyether or peptide linkers. We show by circular dichroism (CD) spectroscopy that they generally have higher selectivity for dimeric vs monomeric G-quadruplexes. The emissive properties of the PtII-salphen dimeric complexes have been used to study their interactions with monomeric and dimeric G-quadruplexes in vitro as well as to study their cellular uptake and localization.
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Affiliation(s)
- Timothy Kench
- Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, United Kingdom
| | - Viktoria Rakers
- Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, United Kingdom
| | - David Bouzada
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Jacobo Gomez-González
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Jenna Robinson
- Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, United Kingdom
| | - Marina K Kuimova
- Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, United Kingdom
| | - Miguel Vázquez López
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - M Eugenio Vázquez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Ramon Vilar
- Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, United Kingdom
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12
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Li X, Wang J, Liu H. Research Progress on Structural Optimization on the Lipid-Soluble Ingredients of Salvia miltiorrhiza. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202206054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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13
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Zegers J, Peters M, Albada B. DNA G-quadruplex-stabilizing metal complexes as anticancer drugs. J Biol Inorg Chem 2023; 28:117-138. [PMID: 36456886 PMCID: PMC9981530 DOI: 10.1007/s00775-022-01973-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 11/17/2022] [Indexed: 12/04/2022]
Abstract
Guanine quadruplexes (G4s) are important targets for cancer treatments as their stabilization has been associated with a reduction of telomere ends or a lower oncogene expression. Although less abundant than purely organic ligands, metal complexes have shown remarkable abilities to stabilize G4s, and a wide variety of techniques have been used to characterize the interaction between ligands and G4s. However, improper alignment between the large variety of experimental techniques and biological activities can lead to improper identification of top candidates, which hampers progress of this important class of G4 stabilizers. To address this, we first review the different techniques for their strengths and weaknesses to determine the interaction of the complexes with G4s, and provide a checklist to guide future developments towards comparable data. Then, we surveyed 74 metal-based ligands for G4s that have been characterized to the in vitro level. Of these complexes, we assessed which methods were used to characterize their G4-stabilizing capacity, their selectivity for G4s over double-stranded DNA (dsDNA), and how this correlated to bioactivity data. For the biological activity data, we compared activities of the G4-stabilizing metal complexes with that of cisplatin. Lastly, we formulated guidelines for future studies on G4-stabilizing metal complexes to further enable maturation of this field.
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Affiliation(s)
- Jaccoline Zegers
- grid.4818.50000 0001 0791 5666Laboratory of Organic Chemistry, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Maartje Peters
- grid.4818.50000 0001 0791 5666Laboratory of Organic Chemistry, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Bauke Albada
- Laboratory of Organic Chemistry, Wageningen University and Research, Stippeneng 4, 6708 WE, Wageningen, The Netherlands.
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14
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Lo R, Majid A, Fruhwirth GO, Vilar R. Radiolabelling Pt-based quadruplex DNA binders via click chemistry. Bioorg Med Chem 2022; 76:117097. [PMID: 36417789 DOI: 10.1016/j.bmc.2022.117097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/19/2022] [Accepted: 11/08/2022] [Indexed: 11/15/2022]
Abstract
Guanine-rich sequences of DNA and RNA can fold into intramolecular tetra-helical assemblies known as G-quadruplexes (G4). Their formation in vivo has been associated to a range of biological functions and therefore they have been identified as potential drug targets. Consequently, a broad range of small molecules have been developed to target G4s. Amongst those are metal complexes with Schiff base ligands. Herein, we report the functionalisation of one of these well-established G4 DNA binders (based on a square planar platinum(II)-salphen complex) with two different radiolabelled complexes. An 111In-conjugate was successfully used to assess its in vivo distribution in a mouse tumour model using single-photon emission computed tomography (SPECT) imaging. These studies highlighted the accumulation of this Pt-salphen-111In conjugate in the tumour.
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Affiliation(s)
- Rainbow Lo
- Imaging Therapies and Cancer Group, Comprehensive Cancer Centre, School of Cancer and Pharmaceutical Sciences, King's College London, SE1 1UL London, UK; Department of Chemistry, Molecular Sciences Research Hub, White City Campus, Imperial College London, W12 0BZ London, UK
| | - Aatikah Majid
- Department of Chemistry, Molecular Sciences Research Hub, White City Campus, Imperial College London, W12 0BZ London, UK
| | - Gilbert O Fruhwirth
- Imaging Therapies and Cancer Group, Comprehensive Cancer Centre, School of Cancer and Pharmaceutical Sciences, King's College London, SE1 1UL London, UK.
| | - Ramon Vilar
- Department of Chemistry, Molecular Sciences Research Hub, White City Campus, Imperial College London, W12 0BZ London, UK.
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15
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Anticancer Activity, Reduction Mechanism and G-Quadruplex DNA Binding of a Redox-Activated Platinum(IV)-Salphen Complex. Int J Mol Sci 2022; 23:ijms232415579. [PMID: 36555221 PMCID: PMC9778786 DOI: 10.3390/ijms232415579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/30/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
Aiming at reducing the unselective cytotoxicity of Pt(II) chemotherapeutics, a great deal of effort has been concentrated into the design of metal-containing drugs with different anticancer mechanisms of action. Inert Pt(IV) prodrugs have been proposed to be a valid alternative as they are activated by reduction directly into the cell releasing active Pt(II) species. On the other hand, a promising strategy for designing metallodrugs is to explore new potential biological targets rather than canonical B-DNA. G-quadruplex nucleic acid, obtained by self-assembly of guanine-rich nucleic acid sequences, has recently been considered an attractive target for anticancer drug design. Therefore, compounds capable of binding and stabilizing this type of DNA structure would be greatly beneficial in anticancer therapy. Here, computational analysis reports the mechanism of action of a recently synthesized Pt(IV)-salphen complex conjugating the inertness of Pt(IV) prodrugs with the ability to bind G-quadruplexes of the corresponding Pt(II) complex. The reduction mechanism of the Pt(IV) complex with a biological reducing agent was investigated in depth by means of DFT, whereas classical MD simulations were carried out to shed light into the binding mechanism of the released Pt(II) complex. The results show that the Pt(IV) prodrug may be reduced by both inner- and outer-sphere mechanisms, and the active Pt(II) complex, as a function of its protonation state, stabilizes the G-quadruplex DNA prevalently, either establishing π-stacking interactions with the terminal G-tetrad or through electrostatic interactions along with H-bonds formation.
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16
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Salem AA, El Haty IA, Ghattas MA. GW-2974 and SCH-442416 modulators of tyrosine kinase and adenosine receptors can also stabilize human telomeric G-quadruplex DNA. PLoS One 2022; 17:e0277963. [PMID: 36476719 PMCID: PMC9728906 DOI: 10.1371/journal.pone.0277963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 11/08/2022] [Indexed: 12/13/2022] Open
Abstract
GW-2974 is a potent tyrosine kinase receptor inhibitor while SCH-442416 is a potent adenosine receptors' antagonist with high selectivity towards human adenosine A2A receptor over other adenosine receptors. The two compounds were reported to possess anti-cancer properties. This study aimed to investigate whether stabilization of human telomeric G-quadruplex DNA by GW-2974- and SCH-442416 is a plausible fundamental mechanism underlying their anti-cancer effects. Human telomeric G-quadruplex DNA with sequence AG3(TTAGGG)3 was used. The study used ultraviolet-visible (UV-Vis), fluorescence, fluorescence quenching, circular dichroism (CD), melting temperatures (Tm) and molecular docking techniques to evaluate interactions. The results showed that GW-2974 and SCH-442416 interacted with G-quadruplex DNA through intercalation binding into two types of dependent binding sites. Binding affinities of 1.3 × 108-1.72 × 106 M-1 and 1.55 × 107-3.74 × 105 M-1 were obtained for GW-2974 and SCH-442416, respectively. An average number of binding sites between 1 and 2 was obtained. Additionally, the melting temperature curves indicated that complexation of both compounds to G-quadruplex DNA provided more stability (ΔTm = 9.9°C and 9.6°C, respectively) compared to non-complexed G-quadruplex DNA. Increasing the molar ratios over 1:1 (drug:G-quadruplex) showed less stabilization effect on DNA. Furthermore, GW-2974 and SCH-442516 have proven ≥ 4.0 folds better selective towards G-quadruplex over double-stranded ct-DNA. In silico molecular docking and dynamics revealed favorable exothermic binding for the two compounds into two sites of parallel and hybrid G-quadruplex DNA structures. The results supported the hypothesis that GW-2974 and SCH-442416 firmly stabilize human telomeric G-quadruplex DNA in additions to modulating tyrosine kinase and adenosine receptors. Consequently, stabilizing G-quadruplex DNA could be a mechanism underlying their anti-cancer activity.
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Affiliation(s)
- Alaa A. Salem
- Department of Chemistry, College of science, United Arab Emirates University, Al Ain, United Arab Emirates
- * E-mail:
| | - Ismail A. El Haty
- Department of Chemistry, College of science, United Arab Emirates University, Al Ain, United Arab Emirates
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17
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Majid SA, Mir JM, Jan G, Shalla AH. Schiff base complexes, cancer cell lines, and anticancer evaluation: a review. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2131402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
| | | | - Gowhar Jan
- Department of Chemistry, IUST, Awantipora Pulwama, India
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18
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Biver T. Discriminating between Parallel, Anti-Parallel and Hybrid G-Quadruplexes: Mechanistic Details on Their Binding to Small Molecules. Molecules 2022; 27:molecules27134165. [PMID: 35807410 PMCID: PMC9268745 DOI: 10.3390/molecules27134165] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/22/2022] [Accepted: 06/27/2022] [Indexed: 12/04/2022] Open
Abstract
G-quadruplexes (G4) are now extensively recognised as a peculiar non-canonical DNA geometry that plays a prime importance role in processes of biological relevance whose number is increasing continuously. The same is true for the less-studied RNA G4 counterpart. G4s are stable structures; however, their geometrical parameters may be finely tuned not only by the presence of particular sequences of nucleotides but also by the salt content of the medium or by a small molecule that may act as a peculiar topology inducer. As far as the interest in G4s increases and our knowledge of these species deepens, researchers do not only verify the G4s binding by small molecules and the subsequent G4 stabilisation. The most innovative studies now aim to elucidate the mechanistic details of the interaction and the ability of a target species (drug) to bind only to a peculiar G4 geometry. In this focused review, we survey the advances in the studies of the binding of small molecules of medical interest to G4s, with particular attention to the ability of these species to bind differently (intercalation, lateral binding or sitting atop) to different G4 topologies (parallel, anti-parallel or hybrid structures). Some species, given the very high affinity with some peculiar G4 topology, can first bind to a less favourable geometry and then induce its conversion. This aspect is also considered.
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Affiliation(s)
- Tarita Biver
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, Italy
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19
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Jiang J, Teunens T, Tisaun J, Denuit L, Moucheron C. Ruthenium(II) Polypyridyl Complexes and Their Use as Probes and Photoreactive Agents for G-quadruplexes Labelling. Molecules 2022; 27:1541. [PMID: 35268640 PMCID: PMC8912042 DOI: 10.3390/molecules27051541] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 02/01/2023] Open
Abstract
Due to their optical and electrochemical properties, ruthenium(II) polypyridyl complexes have been used in a wide array of applications. Since the discovery of the light-switch ON effect of [Ru(bpy)2dppz]2+ when interacting with DNA, the design of new Ru(II) complexes as light-up probes for specific regions of DNA has been intensively explored. Amongst them, G-quadruplexes (G4s) are of particular interest. These structures formed by guanine-rich parts of DNA and RNA may be associated with a wide range of biological events. However, locating them and understanding their implications in biological pathways has proven challenging. Elegant approaches to tackle this challenge relies on the use of photoprobes capable of marking, reversibly or irreversibly, these G4s. Indeed, Ru(II) complexes containing ancillary π-deficient TAP ligands can create a covalently linked adduct with G4s after a photoinduced electron transfer from a guanine residue to the excited complex. Through careful design of the ligands, high selectivity of interaction with G4 structures can be achieved. This allows the creation of specific Ru(II) light-up probes and photoreactive agents for G4 labelling, which is at the core of this review composed of an introduction dedicated to a brief description of G-quadruplex structures and two main sections. The first one will provide a general picture of ligands and metal complexes interacting with G4s. The second one will focus on an exhaustive and comprehensive overview of the interactions and (photo)reactions of Ru(II) complexes with G4s.
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Affiliation(s)
- Julie Jiang
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles, Avenue F. D. Roosevelt 50-CP 160/08, 1050 Brussels, Belgium; (J.J.); (T.T.); (J.T.); (L.D.)
| | - Titouan Teunens
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles, Avenue F. D. Roosevelt 50-CP 160/08, 1050 Brussels, Belgium; (J.J.); (T.T.); (J.T.); (L.D.)
- Laboratoire de Chimie des Matériaux Nouveaux, Université de Mons, Place du Parc 20, 7000 Mons, Belgium
| | - Jérôme Tisaun
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles, Avenue F. D. Roosevelt 50-CP 160/08, 1050 Brussels, Belgium; (J.J.); (T.T.); (J.T.); (L.D.)
| | - Laura Denuit
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles, Avenue F. D. Roosevelt 50-CP 160/08, 1050 Brussels, Belgium; (J.J.); (T.T.); (J.T.); (L.D.)
| | - Cécile Moucheron
- Laboratoire de Chimie Organique et Photochimie, Service de Chimie et PhysicoChimie Organiques, Université Libre de Bruxelles, Avenue F. D. Roosevelt 50-CP 160/08, 1050 Brussels, Belgium; (J.J.); (T.T.); (J.T.); (L.D.)
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20
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Duraisamy R, Palanisamy UM, Sheriffa Begum KMM, Dharmar P. Facile induction and stabilization of intramolecular antiparallel G-quadruplex of d(TTAGGG)n on interaction with triazine-2-imidazole ethyl amine compound and its Cu(II), Zn(II) complexes under no-salt conditions. J CHEM SCI 2022. [DOI: 10.1007/s12039-021-01996-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Interaction between GW2974 and telomeric G-quadruplex DNA: a possible anticancer mechanism. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01801-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Zou M, Li JY, Zhang MJ, Li JH, Huang JT, You PD, Liu SW, Zhou CQ. G-quadruplex binder pyridostatin as an effective multi-target ZIKV inhibitor. Int J Biol Macromol 2021; 190:178-188. [PMID: 34461156 DOI: 10.1016/j.ijbiomac.2021.08.121] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 12/13/2022]
Abstract
At present, there are still no anti-Zika virus (ZIKV) drugs or vaccines approved by FDA with accurate targets and antiviral mechanisms. Considering the RNA G-quadruplex sequences in ZIKV genome, it is very meaningful to develop G-quadruplex binders as potential anti-ZIKV drugs with novel and accurate targets. In this paper, five classical G-quadruplex binders including Ber, Braco 19, NiL, 360A and PDS have been chosen to discuss their interaction with ZIKV RNA G-quadruplexes. PDS shows higher binding affinity and thermal stability than the other G-quadruplex binders. This property is further evidenced in cells by immunofluorescence microscopy. And PDS shows higher anti-ZIKV activity (EC50 = 4.2 ± 0.4 μM) than the other G-quadruplex binders as well as the positive control ribavirin, with a low cytotoxicity. By time-of-addition assay, PDS exerts antiviral activity at the post-entry process of ZIKV replication cycle, thus inhibiting ZIKV mRNA replication and protein expression. Furthermore, PDS combines with ZIKV NS2B-NS3 protease and reduces its catalytic activity. This study suggests that G-quadruplex binder PDS is an effective multi-target ZIKV inhibitor, which provides more guidance to design some novel anti-ZIKV drugs targeting ZIKV RNA G-quadruplexes.
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Affiliation(s)
- Min Zou
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Jing-Yan Li
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Meng-Jia Zhang
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Jun-Hui Li
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Jun-Tao Huang
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Pei-Dan You
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Shu-Wen Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China.
| | - Chun-Qiong Zhou
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China.
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23
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Rigamonti L, Reginato F, Ferrari E, Pigani L, Gigli L, Demitri N, Kopel P, Tesarova B, Heger Z. From solid state to in vitro anticancer activity of copper(II) compounds with electronically-modulated NNO Schiff base ligands. Dalton Trans 2021; 49:14626-14639. [PMID: 33057512 DOI: 10.1039/d0dt03038d] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The copper(ii) complexes of general formula [Cu(GL)(Cl)] (1-3, G = OMe, H and NO2, respectively), bearing tridentate Schiff base ligands (GL-) and a chloride as a fourth labile one, are here reported. The Schiff bases derive from the monocondensation of ethylenediamine and substituted salicylaldehyde, where the electronic properties are modulated by the releasing or withdrawing power of the G group. The compounds were structurally characterized through single crystal Synchrotron X-ray diffraction experiments in the solid state, revealing that 1 (OMe) and 2 (H) adopt a dimeric assembly [Cu(μ-Cl)(GL)]2 through apical interaction of the chloride ions of two monomeric units, while 3 embraces a 1D polymeric chain structure [Cu(μ-Cl)(NO2L)]n with a similar bridging fashion, all supported by extended intramolecular or intrachain hydrogen bonds. The redox properties of the complexes were also studied by cyclic voltammetry with no marked effect of the substituent on the potential of the CuII/CuI redox system. UV/Vis spectroscopic studies in mimicked physiological conditions highlighted the intactness and stability of the coordinated NNO tridentate ligand in 1-3 and the lability of the coordinated chloride ion with the formation of the aquo-complexes [Cu(GL)(H2O)]+ in aqueous solution, as confirmed by conductance measurements with a 1 : 1 electrolyte molar conductivity. In vitro tests on cell viability were conducted on malignant cell lines typical for their poor prognosis and curability, revealing time-dependent and differential cytotoxicity given by the substituent G. All compounds were capable of formation of intracellular reactive oxygen species and DNA intercalation, acting as nuclease and producing double-strand DNA breaks. This is especially effective for 3 (NO2), which revealed the highest anticancer activity against malignant triple-negative breast cancer MDA-MB-231 cells, with a two-to-four-fold cytotoxicity enhancement with respect to 1 (OMe) and 2 (H), and, most important, substantial differentiation of cytotoxicity with respect to healthy endothelial HUVEC cell line.
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Affiliation(s)
- Luca Rigamonti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Francesco Reginato
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Erika Ferrari
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Laura Pigani
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, via G. Campi 103, 41125 Modena, Italy.
| | - Lara Gigli
- Elettra Synchrotron Trieste, Strada Statale 14 - km 163.5 - Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Nicola Demitri
- Elettra Synchrotron Trieste, Strada Statale 14 - km 163.5 - Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Pavel Kopel
- Department of Inorganic Chemistry, Faculty of Science, Palacky University, 17. listopadu 12, CZ-77146, Olomouc, Czech Republic
| | - Barbora Tesarova
- Department of Chemistry and Biochemistry, Mendel University, Zemedelska 1, CZ-61300, Brno, Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry, Mendel University, Zemedelska 1, CZ-61300, Brno, Czech Republic and Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, CZ-612-00 Brno, Czech Republic
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24
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Palma E, Carvalho J, Cruz C, Paulo A. Metal-Based G-Quadruplex Binders for Cancer Theranostics. Pharmaceuticals (Basel) 2021; 14:605. [PMID: 34201682 PMCID: PMC8308583 DOI: 10.3390/ph14070605] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/21/2021] [Accepted: 06/21/2021] [Indexed: 12/11/2022] Open
Abstract
The ability of fluorescent small molecules, such as metal complexes, to selectively recognize G-quadruplex (G4) structures has opened a route to develop new probes for the visualization of these DNA structures in cells. The main goal of this review is to update the most recent research efforts towards the development of novel cancer theranostic agents using this type of metal-based probes that specifically recognize G4 structures. This encompassed a comprehensive overview of the most significant progress in the field, namely based on complexes with Cu, Pt, and Ru that are among the most studied metals to obtain this class of molecules. It is also discussed the potential interest of obtaining G4-binders with medical radiometals (e.g., 99mTc, 111In, 64Cu, 195mPt) suitable for diagnostic and/or therapeutic applications within nuclear medicine modalities, in order to enable their theranostic potential.
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Affiliation(s)
- Elisa Palma
- C2TN-Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal;
| | - Josué Carvalho
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal; (J.C.); (C.C.)
| | - Carla Cruz
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilhã, Portugal; (J.C.); (C.C.)
| | - António Paulo
- C2TN-Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal;
- DECN-Departamento de Engenharia e Ciências Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal
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Cu(II) coordination polymer bearing diazenyl-benzoic ligand: Synthesis, physico-chemical and XRD/HSA-interactions. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129604] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Fik-Jaskółka MA, Pospieszna-Markiewicz I, Roviello GN, Kubicki M, Radecka-Paryzek W, Patroniak V. Synthesis and Spectroscopic Investigation of a Hexaaza Lanthanum(III) Macrocycle with a Hybrid-Type G4 DNA Stabilizing Effect. Inorg Chem 2021; 60:2122-2126. [PMID: 33528248 PMCID: PMC7888264 DOI: 10.1021/acs.inorgchem.0c03260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we present a mononuclear lanthanum(III) complex obtained in a template cyclocondensation reaction of lanthanum(III) nitrate salt, 1,2-propanediamine, and 2,6-diacetylpyridine (LaPA complex). A preliminary investigation of the biological potential of this compound was conducted using a biomedically relevant target Tel26. We found that, different from parallel G4, antiparallel G4, and duplex DNA, only a hybrid-type G4 structure of Tel26 in a K+ solution was significantly stabilized by ≥7 °C, which emerged in our UV melting studies. Moreover, LaPA induced structural changes in the Tel26 structure in a K+-deprived solution, suggesting that it may also lead to conformational changes in "non-G4" telomeric DNA.
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Affiliation(s)
- Marta A Fik-Jaskółka
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.,Centre for Advanced Technology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | | | - Giovanni N Roviello
- Institute of Biostructures and Bioimaging, National Research Council, Mezzocannone 16, 80134 Napoli, Italy
| | - Maciej Kubicki
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Wanda Radecka-Paryzek
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Violetta Patroniak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
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27
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Qin LQ, Liang CJ, Zhou Z, Qin QP, Wei ZZ, Tan MX, Liang H. Mitochondria-localizing curcumin-cryptolepine Zn(II) complexes and their antitumor activity. Bioorg Med Chem 2021; 30:115948. [PMID: 33360578 DOI: 10.1016/j.bmc.2020.115948] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/03/2020] [Accepted: 12/06/2020] [Indexed: 01/08/2023]
Abstract
Many metal complexes are potent candidates as mitochondrial-targeting agents. In this study, four novel Zn(II) complexes, [Zn(BPQA)Cl2] (Zn1), [Zn(BPQA)(Curc)]Cl (Zn2), [Zn(PQA)Cl2] (Zn3), and [Zn(PQA)(Curc)]Cl (Zn4), containing N,N-bis(pyridin-2-ylmethyl)benzofuro[3,2-b]quinolin-11-amine (BPQA), N-(pyridin-2-ylmethyl)benzofuro[3,2-b]quinolin-11-amine (PQA), and curcumin (H-Curc) were synthesized. An MTT assay showed that Zn1-Zn4 had strong anticancer activities against SK-OV-3/DDP and T-24 tumor cells with IC50 values of 0.03-6.19 μM. Importantly, Zn1 and Zn2 displayed low toxicities against normal HL-7702 cells. Mechanism experiments demonstrated that probe Zn2 showed appreciable fluorescence in the red region of the spectrum, and substantial accumulation of Zn2 occurred in the mitochondria after treatment, indicating increases in Ca2+ and reactive oxygen species levels, loss of the mitochondrial membrane potential, and consequent induction of mitochondrial dysfunction at low concentrations. In addition, the probe Zn2 effectively (50.7%) inhibited the growth of T-24 bladder tumor cells in vivo. The probe Zn2 shows potential for use in cancer therapy while retaining the H-Curc as an imaging probe.
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Affiliation(s)
- Li-Qin Qin
- Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Chun-Jie Liang
- Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Zhen Zhou
- Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Qi-Pin Qin
- Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China; State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China.
| | - Zu-Zhuang Wei
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, PR China.
| | - Ming-Xiong Tan
- Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, PR China
| | - Hong Liang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Road, Guilin 541004, PR China.
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28
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Visualising G-quadruplex DNA dynamics in live cells by fluorescence lifetime imaging microscopy. Nat Commun 2021; 12:162. [PMID: 33420085 PMCID: PMC7794231 DOI: 10.1038/s41467-020-20414-7] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 11/27/2020] [Indexed: 12/12/2022] Open
Abstract
Guanine rich regions of oligonucleotides fold into quadruple-stranded structures called G-quadruplexes (G4s). Increasing evidence suggests that these G4 structures form in vivo and play a crucial role in cellular processes. However, their direct observation in live cells remains a challenge. Here we demonstrate that a fluorescent probe (DAOTA-M2) in conjunction with fluorescence lifetime imaging microscopy (FLIM) can identify G4s within nuclei of live and fixed cells. We present a FLIM-based cellular assay to study the interaction of non-fluorescent small molecules with G4s and apply it to a wide range of drug candidates. We also demonstrate that DAOTA-M2 can be used to study G4 stability in live cells. Reduction of FancJ and RTEL1 expression in mammalian cells increases the DAOTA-M2 lifetime and therefore suggests an increased number of G4s in these cells, implying that FancJ and RTEL1 play a role in resolving G4 structures in cellulo. Direct observation of G-quadruplexes (G4s) in live cells is challenging. Here the authors report a method to identify G4s within the nuclei of live and fixed cells using a fluorescent probe combined with fluorescence lifetime imaging microscopy.
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29
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Sun Y, Lu Y, Bian M, Yang Z, Ma X, Liu W. Pt(II) and Au(III) complexes containing Schiff-base ligands: A promising source for antitumor treatment. Eur J Med Chem 2020; 211:113098. [PMID: 33348237 DOI: 10.1016/j.ejmech.2020.113098] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/24/2020] [Accepted: 12/08/2020] [Indexed: 12/11/2022]
Abstract
The effective application of cisplatin in the clinic as an antitumor treatment has stimulated widespread interest in inorganic metal drugs. In particular, complexes containing the transition metals platinum and gold have attracted considerable attention due to their antitumor effects. The Pt(II) and Au(III) Schiff-base complexes are potential antitumor agents because of their remarkable biological activities and good stability, lipophilicity, and electroluminescent properties. These complexes act via various antitumor mechanisms that are unlike those of the classic platinum drugs, providing a feasible solution for improving the serious side effects caused by metal chemotherapy. In this review, promising antitumor agents based on Pt(II) and Au(III) complexes containing Schiff-base ligands, and their biological targets, including G-quadruplex DNA and thioredoxin reductase, are comprehensively summarized.
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Affiliation(s)
- Ying Sun
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yunlong Lu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Mianli Bian
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Zhibin Yang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Xiaoyan Ma
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Wukun Liu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China; State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210023, China.
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30
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Nayis A, Liebl K, Frost CV, Zacharias M. Targeting Telomeres: Molecular Dynamics and Free Energy Simulation of Gold-Carbene Binding to DNA. Biophys J 2020; 120:101-108. [PMID: 33285115 DOI: 10.1016/j.bpj.2020.11.2263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/22/2020] [Accepted: 11/24/2020] [Indexed: 01/21/2023] Open
Abstract
DNA sequences in regulatory regions and in telomers at the ends of chromosomes frequently contain tandem repeats of guanine nucleotides that can form stacked structures stabilized by Hoogsten pairing and centrally bound monovalent cations. The replication and elongation of telomeres requires the disruption of these G-quadruplex structures. Hence, drug molecules such as gold (Au)-carbene that stabilize G-quadruplexes may also interfere with the elongation of telomeres and, in turn, could be used to control cell replication and growth. To better understand the molecular mechanism of Au-carbene binding to G-quadruplexes, we employed molecular dynamics simulations and free energy simulations. Whereas very restricted mobility of two Au-carbene ligands was found upon binding as a doublet to one side of the G-quadruplex, much larger translational and orientational mobility was observed for a single Au-carbene binding at the second G-quadruplex surface. Comparative simulations on duplex DNA in the presence of Au-carbene ligands indicates a preference for the minor groove and weaker unspecific and more salt-dependent binding than to the G-quadruplex surface. Analysis of energetic contributions reveals a dominance of nonpolar and van der Waals interactions to drive binding. The simulations can also be helpful for proposing possible modifications that could improve Au-carbene affinity and specificity for G-quadruplex binding.
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Affiliation(s)
- Asmar Nayis
- Physics Department T38, Technical University of Munich, Garching, Germany
| | - Korbinian Liebl
- Physics Department T38, Technical University of Munich, Garching, Germany
| | - Christina V Frost
- Physics Department T38, Technical University of Munich, Garching, Germany
| | - Martin Zacharias
- Physics Department T38, Technical University of Munich, Garching, Germany.
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31
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Mestizo PD, Narváez DM, Pinzón-Ulloa JA, Di Bello DT, Franco-Ulloa S, Macías MA, Groot H, Miscione GP, Suescun L, Hurtado JJ. Novel complexes with ONNO tetradentate coumarin schiff-base donor ligands: x-ray structures, DFT calculations, molecular dynamics and potential anticarcinogenic activity. Biometals 2020; 34:119-140. [PMID: 33185808 DOI: 10.1007/s10534-020-00268-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 11/04/2020] [Indexed: 12/24/2022]
Abstract
The synthesis of eight novel Zn(II), Co(II), Cu(II), Ni(II) and Pt(II) complexes (2-9) derived from the ONNO tetradentate coumarin Schiff-Base donor ligands, L1 and the novel L2, was performed. All compounds were characterized by analytical, spectrometry and spectroscopy techniques. Complexes 2-4 were also characterized by DFT calculations and the structures of 5 and 6 were determined by single-crystal X-ray diffraction analysis. A cytotoxicity study was carried out through an MTT assay in the carcinogenic cell line HeLa and the noncarcinogenic cell lines HFF-1 and HaCaT. The results indicated that among all the evaluated compounds, 2 and 6 presented the best anticarcinogenic potential against HeLa cells with an IC50 of 3.5 and 4.1 µM, respectively. In addition, classical molecular dynamics simulations were performed on the synthesized coordination compounds bound to G4 DNA architectures in the scope of shedding light on their inhibition mode and the most conserved interactions that may lead to the biological activity of the compounds.
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Affiliation(s)
- Paula Daniela Mestizo
- Departamento de Química, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Diana M Narváez
- Human Genetics Laboratory, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | | | - Daniela Torres Di Bello
- Human Genetics Laboratory, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Sebastian Franco-Ulloa
- COBO Computational Bio-Organic Chemistry, Chemistry Department, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Mario A Macías
- Departamento de Química, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Helena Groot
- Human Genetics Laboratory, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Gian Pietro Miscione
- COBO Computational Bio-Organic Chemistry, Chemistry Department, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Leopoldo Suescun
- Cryssmat-Lab/Cátedra de Física/DETEMA, Facultad de Química, Universidad de La República, Montevideo, Uruguay
| | - John J Hurtado
- Departamento de Química, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia.
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32
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Zeng L, Wu Q, Wang T, Li LP, Zhao X, Chen K, Qian J, Yuan L, Xu H, Mei WJ. Selective stabilization of multiple promoter G-quadruplex DNA by using 2-phenyl-1H-imidazole-based tanshinone IIA derivatives and their potential suppressing function in the metastatic breast cancer. Bioorg Chem 2020; 106:104433. [PMID: 33213893 DOI: 10.1016/j.bioorg.2020.104433] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/24/2020] [Accepted: 10/25/2020] [Indexed: 11/17/2022]
Abstract
The G-quadruplex (G4) DNA, which has been developed as a potential anticancer target in drug screening and design, plays a crucial role in the oncogene transcription and translation. Tanshinone IIA derivatives with a planar heterocycle structure may function as G4 stabilizers. We present an innovative case of imidazole-based tanshinone IIA derivatives (1-8) especially compound 4 that improve the selectivity and the binding affinity with G4 DNA and enhance the target tumor inhibition. Cellular and in vivo experiments indicate that the tanshinone IIA derivative 4 inhibits the growth, metastasis, and angiogenesis of triple-negative breast cancer cells possibly through the stabilization of multiple G4 DNAs (e.g., c-myc, K-ras, and VEGF) to induce DNA damage. Further investigation of the intermolecular interaction and the molecular docking indicates that tanshinone IIA derivatives have better selective binding capability to various G4 DNAs than to double-stranded DNA. These findings provide guidance in modifying the molecular structures of tanshinone IIA derivatives and reveal their potential to function as specific G4 stabilizers.
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Affiliation(s)
- Liang Zeng
- Department of Pathology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510623, China
| | - Qiong Wu
- The School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China; Guangdong Province Engineering Centre for Molecular Probe & Biomedicine Imaging, Guangzhou 510006, China
| | - Teng Wang
- The School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Li-Ping Li
- Department of Pathology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510623, China
| | - Xuanhao Zhao
- The School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Kai Chen
- Department of Pathology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510623, China
| | - Jiayi Qian
- The School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Li Yuan
- Department of Pathology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510623, China
| | - Hui Xu
- Department of Pathology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong 510623, China
| | - Wen-Jie Mei
- The School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China; Guangdong Province Engineering Centre for Molecular Probe & Biomedicine Imaging, Guangzhou 510006, China.
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33
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Chetioui S, Zouchoune B, Merazig H, Bouaoud SE, Rouag D, Djukic JP. Synthesis, spectroscopic characterization, crystal structure and theoretical investigation of two azo-palladium (II) complexes derived from substituted (1-phenylazo)-2-naphtol. TRANSIT METAL CHEM 2020. [DOI: 10.1007/s11243-020-00425-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Pham SQT, Richardson C, Kelso C, Willis AC, Ralph SF. The effect of isomerism and other structural variations on the G-quadruplex DNA-binding properties of some nickel Schiff base complexes. Dalton Trans 2020; 49:10360-10379. [PMID: 32666965 DOI: 10.1039/d0dt01370f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A series of novel isomeric nickel Schiff base complexes, as well as nickel complexes of related ligands having asymmetric structures have been prepared and characterised using microanalysis, 1H and 13C NMR spectroscopy and ESI-MS. The Schiff base ligands were prepared by condensation reactions involving ethylenediamine and different derivatives of benzophenone. The solid-state structures of eight of the complexes were also determined and revealed that each possessed a regular square planar coordination geometry around the metal ion. Many of the new complexes featured at least one, and in many instances two, protonatable pendant groups that enhance aqueous solubility. This enabled the DNA binding properties of the latter complexes to be explored using a variety of instrumental approaches, including ESI-MS, circular dichroism (CD) spectroscopy, FRET melting assays and FID assays, as well as molecular docking studies. The results of experiments performed using ESI-MS suggested that none of the nickel complexes exhibit a high affinity towards either a double stranded DNA (dsDNA) molecule D2, or the parallel unimolecular quadruplex DNA (qDNA) molecule Q1. In contrast, complexes (8) and (12) both gave spectra which reflected a significant level of binding to the parallel tetramolecular qDNA Q4. The results of binding experiments performed using CD spectroscopy suggested that (12) exhibits a significant level of affinity towards most types of DNA, while (4) shows a preference for interacting with parallel, unimolecular qDNA molecules. Complex (4) produced the lowest values of DC50 in FID assays performed using parallel Q1 or Q4, confirming its affinity for these qDNA molecules. The results of FRET melting experiments provided further evidence that (12), along with (8), can interact extensively with anti-parallel unimolecular qDNA. Experiments which monitored the effect of the nickel complexes on the melting temperature of D2 showed that none had a stabilising effect on this dsDNA molecule.
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Affiliation(s)
- Son Q T Pham
- School of Chemistry and Molecular Bioscience, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia. and Molecular Horizons, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia
| | - Christopher Richardson
- School of Chemistry and Molecular Bioscience, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia. and Molecular Horizons, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia
| | - Celine Kelso
- School of Chemistry and Molecular Bioscience, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia. and Molecular Horizons, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia
| | - Anthony C Willis
- Research School of Chemistry, Australian National University, Canberra, Australian Capital Territory 0200, Australia
| | - Stephen F Ralph
- School of Chemistry and Molecular Bioscience, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia. and Molecular Horizons, University of Wollongong, Northfields Avenue, Wollongong 2522, Australia
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35
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Arjmand F, Sharma S, Parveen S, Toupet L, Yu Z, Cowan JA. Copper(ii) l/d-valine-(1,10-phen) complexes target human telomeric G-quadruplex motifs and promote site-specific DNA cleavage and cellular cytotoxicity. Dalton Trans 2020; 49:9888-9899. [PMID: 32638779 PMCID: PMC7433390 DOI: 10.1039/d0dt01527j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chiral l-/d-valine-(1,10-phen)-Cu(ii) complexes that target G-quadruplex DNA were synthesized and thoroughly characterized by UV-vis, IR, EPR, ESI-MS, elemental analysis and single crystal X-ray spectroscopy. Complexes 1a and 1b crystallized in the monoclinic P21/c and C2 space groups, respectively. On the basis of Wolfe-Shimer analyses, the binding affinities of 1a and 1b with G-quadruplex telomeric DNA were determined, and 1a exhibited significantly higher binding as compared to 1b. Site selective cleavage of G4-DNA was demonstrated by employing the time-dependent PAGE assay, with 1a exhibiting a significantly higher cleavage rate from A1 to G22 (4.32 (±0.13) μM h-1) than 1b (4.29 (±0.11) μM h-1). The DNA cleavage profile demonstrated that both complexes perform non-random double-strand cleavage by following first-order kinetics (kobs = 0.9432 min-1 for 1a and kobs = 0.6574 min-1 for 1b). Molecular docking simulations were performed with both parallel and anti-parallel topologies of the quadruplex to provide a clear insight on G-quadruplex-complex interactions. Complexes 1a and 1b were found to interact strongly at the minor groove cavity of the quadruplex with preferential selectivity for the parallel vs. anti-parallel quadruplex. The cytotoxic activities of complexes 1a and 1b were evaluated on a few notably important human cancer cell lines, viz, breast (MCF-7), pancreatic strains (BxPC3, AsPC1) and liver (Huh7) by an MTT assay. Both 1a and 1b exhibited pronounced cytotoxic activity with remarkably low IC50 values (1-3 μM) for all tested cancer strains.
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Affiliation(s)
- Farukh Arjmand
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
| | - Surbhi Sharma
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
| | - Sabiha Parveen
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
| | - Loic Toupet
- Institut de Physique de sRennes, UMR 625, Université de Rennes 1, Campus de Beaulieu Bat. 11 A, 263 av. Général Leclerc, 35042 Rennes Cedex, France
| | - Zhen Yu
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, USA
| | - James Allan Cowan
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210, USA
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36
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Xu CX, Liu LY, Lv B, Zhao HY, Cao Q, Zhai T, Mao ZW. Two novel fan-shaped trinuclear Pt(ii) complexes act as G-quadruplex binders and telomerase inhibitors. Dalton Trans 2020; 49:9322-9329. [PMID: 32579629 DOI: 10.1039/d0dt01767a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Two new trinuclear Pt(ii) complexes {[Pt(dien)]3(tib)}(NO3)6 (1) and {[Pt(dpa)]3(tib)}(NO3)6 (2) (dien: diethylenetriamine, dpa: bis-(2-pyridylmethyl)amine, tib: 1,3,5-tris(1H-imidazol-1-yl)benzene) have been designed, synthesized, characterized and applied to a series of biochemical studies. We found that both of the Pt(ii) complexes exhibited much better selectivity for human telomeric G-quadruplex sequence than promoter G-quadruplexes (c-kit, c-myc, and bcl2) or duplex DNA. Both complexes displayed comparative stability and affinity towards human telomeric G-quadruplex by the studies from surface plasmon resonance, fluorescence resonance energy transfer and polymerase chain reaction stop assays. The circular dichroism indicated that both complexes could induce and stabilize anti-parallel G-quadruplex structures. Molecule docking presented that Pt(ii) complex intercalated into the large groove of human telomeric G-quadruplex (PDB ID: 143D). Furthermore, telomeric repeat amplification protocol assays quantitatively evaluated the inhibition of telomerase activity caused by the Pt(ii) complexes. The obtained IC50 values of 6.41 ± 0.042 μM and 2.67 ± 0.035 μM for 1 and 2, respectively, exhibited strong telomerase inhibitions. All results suggest that such fan-shaped trinuclear Pt(ii) complexes are effective and selective G-quadruplex binders, as well as strong telomerase inhibitors. This study provides insight into the development of human telomeric G-quadruplex targeted anticancer drugs based on the metal complex.
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Affiliation(s)
- Cui-Xia Xu
- Jiangsu Key Laboratory for Biofunctional Molecules, College of Life Science and Chemistry, Jiangsu Second Normal University, Nanjing 211222, China and MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Liu-Yi Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Bei Lv
- Jiangsu Key Laboratory for Biofunctional Molecules, College of Life Science and Chemistry, Jiangsu Second Normal University, Nanjing 211222, China
| | - Hao-Yu Zhao
- Jiangsu Key Laboratory for Biofunctional Molecules, College of Life Science and Chemistry, Jiangsu Second Normal University, Nanjing 211222, China
| | - Qian Cao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Teng Zhai
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
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Liao TC, Ma TZ, Chen SB, Cilibrizzi A, Zhang MJ, Li JH, Zhou CQ. Human telomere double G-quadruplex recognition by berberine-bisquinolinium imaging conjugates in vitro and cells. Int J Biol Macromol 2020; 158:S0141-8130(20)33034-8. [PMID: 32339571 DOI: 10.1016/j.ijbiomac.2020.04.171] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/21/2020] [Accepted: 04/21/2020] [Indexed: 10/24/2022]
Abstract
Molecular tools of double or multimeric G-quadruplexes have been given higher requirements on detection sensitivity, thermal stabilization and cell imaging to establish functions of these G-quadruplex aggregates and biological mechanisms as anticancer reagents. Here, two smart berberine-bisquinolinium conjugates (Ber-360A and Ber-PDS) by linking the berberine fluorophore ligand and an established G-quadruplex binder (i.e. bisquinolinium scaffold), have been designed and evaluated their activities and mechanisms for G-quadruplex aggregation. Two conjugates, especially Ber-PDS, are two highly selective, sensitive and fluorescent sensors which can distinguish human telomere double G-quadruplexes from other type G-quadruplexes and ds DNA. These two ligands could be the first example to stack two adjacent G-quadruplex units and fluorescently recognize human telomere double G-quadruplexes. Furthermore, conjugate Ber-PDS could enter the nucleoli and target G-quadruplex DNA through microscopy experiments, and also display strong telomerase inhibition and antitumor activities.
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Affiliation(s)
- Ting-Cong Liao
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Tian-Zhu Ma
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Suo-Bin Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 51006, PR China
| | - Agostino Cilibrizzi
- Institute of Pharmaceutical Science, King's College London, London SE1 9NH, United Kingdom
| | - Meng-Jia Zhang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Jun-Hui Li
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China
| | - Chun-Qiong Zhou
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, PR China.
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38
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Structural, Spectroscopic, and Chemical Bonding Analysis of Zn(II) Complex [Zn(sal)](H2O): Combined Experimental and Theoretical (NBO, QTAIM, and ELF) Investigation. CRYSTALS 2020. [DOI: 10.3390/cryst10040259] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Zn(II) complex of salen-like scaffold [Zn(sal)](H2O) was synthesized and characterized by elemental analysis, IR, UV–Vis, and 1H-NMR spectroscopic techniques. The structure of complex was confirmed by single crystal X-ray diffraction studies. In the complex, Zn (II) was placed in the inner N2O2 compartment of the salen scaffold in square planar geometry and crystallized in the monoclinic space group P21/n. DFT and TDDFT calculations were performed to reproduce the experimentally observed structural and spectroscopic (IR and UV–vis) findings. The bonding of the Zn(II) framework in the [Zn(sal)](H2O) complex was explored in depth. The theoretical approaches employed were perturbation theory within the context of the natural bond orbital (NBO) framework, and quantum theory of atoms in molecule (QTAIM) and electron localization function (ELF) analysis. The study begins by delineating the difference between the NBO and QTAIM approaches. This paper thus exhibits the supportive nature of NBO theory and QTAIM in discussion of the bonding in the [Zn(sal)](H2O) complex, when both the methodologies are used in combination.
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Pont I, Martínez-Camarena Á, Galiana-Roselló C, Tejero R, Albelda MT, González-García J, Vilar R, García-España E. Development of Polyamine-Substituted Triphenylamine Ligands with High Affinity and Selectivity for G-Quadruplex DNA. Chembiochem 2020; 21:1167-1177. [PMID: 31701633 DOI: 10.1002/cbic.201900678] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Indexed: 01/01/2023]
Abstract
Currently, significant efforts are devoted to designing small molecules able to bind selectively to guanine quadruplexes (G4s). These noncanonical DNA structures are implicated in various important biological processes and have been identified as potential targets for drug development. Previously, a series of triphenylamine (TPA)-based compounds, including macrocyclic polyamines, that displayed high affinity towards G4 DNA were reported. Following this initial work, herein a series of second-generation compounds, in which the central TPA has been functionalised with flexible and adaptive linear polyamines, are presented with the aim of maximising the selectivity towards G4 DNA. The acid-base properties of the new derivatives have been studied by means of potentiometric titrations, UV/Vis and fluorescence emission spectroscopy. The interaction with G4s and duplex DNA has been explored by using FRET melting assays, fluorescence spectroscopy and circular dichroism. Compared with previous TPA derivatives with macrocyclic substituents, the new ligands reported herein retain the G4 affinity, but display two orders of magnitude higher selectivity for G4 versus duplex DNA; this is most likely due to the ability of the linear substituents to embrace the G4 structure.
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Affiliation(s)
- Isabel Pont
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain.,Department of Chemistry, Imperial College London, White City Campus, London, W12 OBZ, UK
| | - Álvaro Martínez-Camarena
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Cristina Galiana-Roselló
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Roberto Tejero
- Department of Physical Chemistry, University of Valencia, Dr. Moliner s/n, 46100, Burjassot, Spain
| | - M Teresa Albelda
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Jorge González-García
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain.,Department of Chemistry, Imperial College London, White City Campus, London, W12 OBZ, UK
| | - Ramón Vilar
- Department of Chemistry, Imperial College London, White City Campus, London, W12 OBZ, UK
| | - Enrique García-España
- Department of Inorganic Chemistry, Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, 46980, Paterna, Spain
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40
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Pham SQT, Assadawi N, Wells J, Sophocleous RA, Davis KJ, Yu H, Sluyter R, Dillon CT, Kelso C, Beck JL, Willis AC, Richardson C, Ralph SF. A new class of quadruplex DNA-binding nickel Schiff base complexes. Dalton Trans 2020; 49:4843-4860. [DOI: 10.1039/d0dt00319k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A new nickel Schiff base complex shows selective binding behaviour towards quadruplex DNA and cytotoxicity against cancer cells.
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41
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42
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Kench T, Vilar R. Metal complexes as G-quadruplex binders. ANNUAL REPORTS IN MEDICINAL CHEMISTRY 2020. [DOI: 10.1016/bs.armc.2020.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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43
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Meng T, Qin QP, Zou HH, Wang K, Liang FP. Eighteen 5,7-Dihalo-8-quinolinol and 2,2'-Bipyridine Co(II) Complexes as a New Class of Promising Anticancer Agents. ACS Med Chem Lett 2019; 10:1603-1608. [PMID: 31857834 PMCID: PMC6912862 DOI: 10.1021/acsmedchemlett.9b00356] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 10/30/2019] [Indexed: 12/18/2022] Open
Abstract
![]()
Here
we first report the design of a series of bis-chelate Co(II) 5,7-dihalo-8-quinolinol-phenanthroline
derivative complexes, [Co(py)(QL1)2] (Co1),
[Co(py)(QL2)2] (Co2), [Co(Phen)(QL1)2] (Co3), [Co(Phen)(QL2)2] (Co4), [Co(DPQ)(QL1)2]·(CH3OH)4 (Co5), [Co(DPQ)(QL2)2] (Co6), [Co(DPPZ)(QL1)2]·CH3OH (Co7), [Co(MDP)(QL1)2]·3H2O (Co8), [Co(ODP)(QL1)2]·CH3OH (Co9), [Co(PPT)(QL1)2]·CH3OH (Co10), [Co(ClPT)(QL1)2] (Co11), [Co(dpy)(QL3)2] (Co12), [Co(mpy)(QL1)2] (Co13), [Co(Phen)(QL4)2] (Co14), [Co(ODP)(QL4)2] (Co15), [Co(mpy)(QL4)2]I (Co16), [Co(ClPT)(QL4)2] (Co17), and
[Co(ClPT)(QL5)2] (Co18), with 5,7-dihalo-8-quinolinol
and 2,2′-bipyridine mixed ligands. The antitumor activity of Co1–Co18 has been evaluated against human
HeLa (cervical) cancer cells in vitro (IC50 values = 0.8 nM–11.88 μM), as well as in vivo against HeLa xenograft tumor growth (TIR = 43.7%, p < 0.05). Importantly, Co7 exhibited high safety in vivo and was more effective in inhibiting HeLa tumor
xenograft growth (43.7%) than cisplatin (35.2%) under the same conditions
(2.0 mg/kg). In contrast, the H-QL1 and DPPZ ligands greatly enhanced
the activity and selectivity of Co7 in comparison to Co1–Co6, Co8–Co18, and previously reported cobalt(II) compounds. In addition, Co7 (0.8 nM) inhibited telomerase activity, caused G2/M phase
arrest, and induced mitochondrial dysfunction at a concentration 5662.5
times lower than Co1 (4.53 μM) in related assays.
Taken together, Co7 showed low toxicity, and the combination
could be a novel Co(II) antitumor compound candidate.
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Affiliation(s)
- Ting Meng
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Road, Guilin 541004, P. R. China
| | - Qi-Pin Qin
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Road, Guilin 541004, P. R. China
- Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, College of Chemistry and Food Science, Yulin Normal University, 1303 Jiaoyudong Road, Yulin 537000, P. R. China
| | - Hua-Hong Zou
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Road, Guilin 541004, P. R. China
| | - Kai Wang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Road, Guilin 541004, P. R. China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Fu-Pei Liang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmacy, Guangxi Normal University, 15 Yucai Road, Guilin 541004, P. R. China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
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Zhang YL, Deng CX, Zhou WF, Zhou LY, Cao QQ, Shen WY, Liang H, Chen ZF. Synthesis and in vitro antitumor activity evaluation of copper(II) complexes with 5-pyridin-2-yl-[1,3]dioxolo[4,5-g]isoquinoline derivatives. J Inorg Biochem 2019; 201:110820. [DOI: 10.1016/j.jinorgbio.2019.110820] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 08/16/2019] [Accepted: 09/01/2019] [Indexed: 02/07/2023]
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45
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Li J, Ma J, Zhang Y, Zhang Z, Hu K. Highly sensitive electrochemical analysis of telomerase activity based on magnetic bead separation and exonuclease III-aided target recycling amplification. Bioelectrochemistry 2019; 130:107341. [DOI: 10.1016/j.bioelechem.2019.107341] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/31/2019] [Accepted: 07/31/2019] [Indexed: 12/17/2022]
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46
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Zinc(II) salphen complex-based fluorescence optical sensor for biogenic amine detection. Anal Bioanal Chem 2019; 411:6449-6461. [PMID: 31392436 DOI: 10.1007/s00216-019-02025-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/18/2019] [Accepted: 07/08/2019] [Indexed: 01/09/2023]
Abstract
Biogenic amines have attracted interest among researchers because of their importance as biomarkers in determining the quality of food freshness in the food industry. A rapid and simple technique that is able to detect biogenic amines is needed. In this work, a new optical sensing material for one of the biogenic amines, histamine, based on a new zinc(II) salphen complex was developed. The binding of zinc(II) complexes without an electron-withdrawing group (complex 1) and with electron-withdrawing groups (F, complex 2; Cl, complex 3) to histamine resulted in enhancement of fluorescence. All complexes exhibited high affinity for histamine [binding constant of (7.14 ± 0.80) × 104, (3.33 ± 0.03) × 105, and (2.35 ± 0.14) × 105 M-1, respectively]. Complex 2 was chosen as the sensing material for further development of an optical sensor for biogenic amines in the following step since it displayed enhanced optical properties in comparison with complexes 1 and 3. The optical sensor for biogenic amines used silica microparticles as the immobilisation support and histamine as the analyte. The optical sensor had a limit of detection for histamine of 4.4 × 10-12 M, with a linear working range between 1.0 × 10-11 and 1.0 × 10-6 M (R2 = 0.9844). The sensor showed good reproducibility, with a low relative standard deviation (5.5 %). In addition, the sensor exhibited good selectivity towards histamine and cadaverine over other amines, such as 1,2-phenylenediamine, triethylamine, and trimethylamine. Recovery and real sample studies suggested that complex 2 could be a promising biogenic amine optical sensing material that can be applied in the food industry, especially in controlling the safety of food for it to remain fresh and healthy for consumption.
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47
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Ruehl CL, Lim AHM, Kench T, Mann DJ, Vilar R. An Octahedral Cobalt(III) Complex with Axial NH 3 Ligands that Templates and Selectively Stabilises G-quadruplex DNA. Chemistry 2019; 25:9691-9700. [PMID: 31087710 DOI: 10.1002/chem.201901569] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/08/2019] [Indexed: 12/28/2022]
Abstract
Guanine-rich sequences of DNA are known to readily fold into tetra-stranded helical structures known as G-quadruplexes (G4). Due to their biological relevance, G4s are potential anticancer drug targets and therefore there is significant interest in molecules with high affinity for these structures. Most G4 binders are polyaromatic planar compounds which π-π stack on the G4's guanine tetrad. However, many of these compounds are not very selective since they can also intercalate into duplex DNA. Herein we report a new class of binder based on an octahedral cobalt(III) complex that binds to G4 via a different mode involving hydrogen bonding, electrostatic interactions and π-π stacking. We show that this new compound binds selectivity to G4 over duplex DNA (particularly to the G-rich sequence of the c-myc promoter). This new octahedral complex also has the ability to template the formation of G4 DNA from the unfolded sequence. Finally, we show that upon binding to G4, the complex prevents helicase Pif1-p from unfolding the c-myc G4 structure.
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Affiliation(s)
- Carmen L Ruehl
- Department of Chemistry, Imperial College London, White City, London, W12 0BZ, UK
| | - Aaron H M Lim
- Department of Chemistry, Imperial College London, White City, London, W12 0BZ, UK.,Department of Life Sciences, Imperial College London, South Kensington, London, SW7 2AZ, UK
| | - Timothy Kench
- Department of Chemistry, Imperial College London, White City, London, W12 0BZ, UK
| | - David J Mann
- Department of Life Sciences, Imperial College London, South Kensington, London, SW7 2AZ, UK
| | - Ramon Vilar
- Department of Chemistry, Imperial College London, White City, London, W12 0BZ, UK
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48
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Wumaier M, Shi JJ, Yao TM, Hu XC, Gao RR, Shi S. G-quadruplex and duplex DNA binding studies of novel Ruthenium(II) complexes containing ascididemin ligands. J Inorg Biochem 2019; 196:110681. [DOI: 10.1016/j.jinorgbio.2019.03.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 03/22/2019] [Accepted: 03/27/2019] [Indexed: 11/29/2022]
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49
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Suganthi S, Sivaraj R, Enoch IVMV. Molecular encapsulation of berberine by a modified β-cyclodextrin and binding of host: guest complex to G-quadruplex DNA. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 38:858-873. [PMID: 31148522 DOI: 10.1080/15257770.2019.1618469] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The capacity to control quadruplex formation, especially in cancer cells, is captivating and entails a reasonable comprehension of the ligand-G-quadruplex binding. Herein, we report an iminopyrenyl-β-cyclodextrin conjugate interacting with duplex and G-quadrulex DNAs. In addition, the host: guest association of the established G-quadruplex binder, berberine, with the β-cyclodextrin derivative is studied employing 2-D ROESY. NMR, UV-visible, and fluorescence spectroscopic techniques are utilized to explore the β-cyclodextrin conjugate's interaction with the quadruplexes. The Binding constants are accounted for the association of the ligands to each of the DNAs viz., calf thymus DNA (duplex), kit22, telo24, and myc22 (quadruplexes). The modulation of the iminopyrenyl-β-cyclodextrin binding to the DNAs are observed when berberine is loaded in the host molecule. A vivid distinction between the interactions of the ligands with duplex and quadruplex structures is inferred. Berberine-loaded iminopyrenyl-β-cyclodextrin shows a higher affinity for binding to kit22.
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Affiliation(s)
- Soundrapandian Suganthi
- Department of Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India
| | - Ramasamy Sivaraj
- Nanotoxicology Research Lab, Department of Nanoscience, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India
| | - Israel V M V Enoch
- Department of Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India.,Nanotoxicology Research Lab, Department of Nanoscience, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India
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50
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Qin QP, Wang ZF, Wang SL, Luo DM, Zou BQ, Yao PF, Tan MX, Liang H. In vitro and in vivo antitumor activities of three novel binuclear platinum(II) complexes with 4′-substituted-2,2′:6′,2″-terpyridine ligands. Eur J Med Chem 2019; 170:195-202. [DOI: 10.1016/j.ejmech.2019.03.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/02/2019] [Accepted: 03/05/2019] [Indexed: 12/11/2022]
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