101
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Amagai K, Ikeda H, Hashimoto J, Kozone I, Izumikawa M, Kudo F, Eguchi T, Nakamura T, Osada H, Takahashi S, Shin-Ya K. Identification of a gene cluster for telomestatin biosynthesis and heterologous expression using a specific promoter in a clean host. Sci Rep 2017; 7:3382. [PMID: 28611443 PMCID: PMC5469769 DOI: 10.1038/s41598-017-03308-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 04/26/2017] [Indexed: 01/24/2023] Open
Abstract
Telomestatin, a strong telomerase inhibitor with G-quadruplex stabilizing activity, is a potential therapeutic agent for treating cancers. Difficulties in isolating telomestatin from microbial cultures and in chemical synthesis are bottlenecks impeding the wider use. Therefore, improvement in telomestatin production and structural diversification are required for further utilization and application. Here, we discovered the gene cluster responsible for telomestatin biosynthesis, and achieved production of telomestatin by heterologous expression of this cluster in the engineered Streptomyces avermitilis SUKA strain. Utilization of an optimal promoter was essential for successful production. Gene disruption studies revealed that the tlsB, tlsC, and tlsO-T genes play key roles in telomestatin biosynthesis. Moreover, exchanging TlsC core peptide sequences resulted in the production of novel telomestatin derivatives. This study sheds light on the expansion of chemical diversity of natural peptide products for drug development.
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Affiliation(s)
- Keita Amagai
- Technology Research Association for Next Generation Natural Products Chemistry, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
- RIKEN Center for Sustainable Resource Science, Natural Product Biosynthesis Research Unit, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Haruo Ikeda
- Kitasato Institute for Life Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Junko Hashimoto
- Japan Biological Informatics Consortium, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
| | - Ikuko Kozone
- Japan Biological Informatics Consortium, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
| | - Miho Izumikawa
- Japan Biological Informatics Consortium, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
| | - Fumitaka Kudo
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Tadashi Eguchi
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Takemichi Nakamura
- RIKEN Center for Sustainable Resource Science, Molecular Structure Characterization Unit, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Hiroyuki Osada
- RIKEN Center for Sustainable Resource Science, Chemical Biology Research Group, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Shunji Takahashi
- RIKEN Center for Sustainable Resource Science, Natural Product Biosynthesis Research Unit, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
| | - Kazuo Shin-Ya
- National Institute of Advanced Industrial Science and Technology, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan.
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102
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Zhao XL, Zhao HQ, Xu XX, Li ZS, Wang KZ. Inducement and stabilization of G-quadruplex DNA by a thiophene-containing dinuclear ruthenium(II) complex. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1322694] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Xiao-Long Zhao
- College of Chemistry & Environmental Science, Hebei University, Baoding, PR China
| | - Hua-Qian Zhao
- College of Chemistry & Environmental Science, Hebei University, Baoding, PR China
| | - Xue-Xue Xu
- College of Chemistry & Environmental Science, Hebei University, Baoding, PR China
| | - Zhen-Sheng Li
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, PR China
| | - Ke-Zhi Wang
- Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, PR China
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103
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Kožurková M, Sabolová D, Kristian P. A review on acridinylthioureas and its derivatives: biological and cytotoxic activity. J Appl Toxicol 2017; 37:1132-1139. [PMID: 28370171 DOI: 10.1002/jat.3464] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 02/17/2017] [Accepted: 02/17/2017] [Indexed: 11/07/2022]
Abstract
Acridines possess two characteristics that have led many researchers to consider the agents interesting targets for future development as potential farmacophores: the planar acridine skeleton, which is able to intercalate into DNA, and the intense fluorescence of the agents. This review offers a study of the multifunctional character of acridines and the synthesis of novel acridine derivatives, with particular focus being placed on isothiocyanates and their congeners, e.g. thioureas, isothioureas, quaternary ammonium salts and platinum/gold conjugates. The review provides an overview of the structure, spectral properties, DNA binding and biological activity of acridinylthiourea congeners. These acridinylthiourea derivatives display significant cytotoxic activities against different types of cancer cell lines at micromolar concentrations. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Mária Kožurková
- Department of Biochemisty, Institute of Chemistry, P.J. Šafárik University Košice, Moyzesova 11, Košice, Slovak Republic.,Biomedical Research Center, University Hospital Hradec Kralove, Sokolovska 581, Hradec Kralove, Czech Republic
| | - Danica Sabolová
- Department of Biochemisty, Institute of Chemistry, P.J. Šafárik University Košice, Moyzesova 11, Košice, Slovak Republic
| | - Pavol Kristian
- Department of Organic Chemistry, Institute of Chemistry, P.J. Šafárik University Košice, Moyzesova 11, Košice, Slovak Republic
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104
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Kanti Si M, Sen A, Ganguly B. Exploiting hydrogen bonding interactions to probe smaller linear and cyclic diamines binding to G-quadruplexes: a DFT and molecular dynamics study. Phys Chem Chem Phys 2017; 19:11474-11484. [DOI: 10.1039/c7cp00472a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This report reveals that hydrogen bonding interactions between the ligand and G-quadruplex can initiate an alternative binding motif to typical π-stacking interactions.
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Affiliation(s)
- Mrinal Kanti Si
- Computation and Simulation Unit (Analytical Discipline and Centralized Instrument Facility)
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar
- India
- Academy of Scientific and Innovative Research
| | - Anik Sen
- Computation and Simulation Unit (Analytical Discipline and Centralized Instrument Facility)
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar
- India
| | - Bishwajit Ganguly
- Computation and Simulation Unit (Analytical Discipline and Centralized Instrument Facility)
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar
- India
- Academy of Scientific and Innovative Research
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105
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Anjong TF, Kim G, Jang HY, Yoon J, Kim J. Diiridium(iii) complexes: luminescent probes and sensors for G-quadruplex DNA and endoplasmic reticulum imaging. NEW J CHEM 2017. [DOI: 10.1039/c6nj02890j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Two new dinuclear iridium (Ir) complexes bridged by a conjugated aromatic tppz ligand, (bhq)2Ir(tppz)Ir(bhq)2(1) and (ppy)2Ir(tppz)Ir(ppy)2(2) (bhq = benzo(h)quinolone, ppy = phenyl-pyridine, tppz = tetrapyrido[3,2-a:2′,3′-c:3′′,2′′-h:2′′′,3′′′-j]phenazine), were prepared.
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Affiliation(s)
| | - Gyoungmi Kim
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Korea
| | - Ha Yoon Jang
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Korea
| | - Juyoung Yoon
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Korea
| | - Jinheung Kim
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Korea
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106
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Palluotto F, Sosic A, Pinato O, Zoidis G, Catto M, Sissi C, Gatto B, Carotti A. Quinolino[3,4- b ]quinoxalines and pyridazino[4,3- c ]quinoline derivatives: Synthesis, inhibition of topoisomerase IIα, G-quadruplex binding and cytotoxic properties. Eur J Med Chem 2016; 123:704-717. [DOI: 10.1016/j.ejmech.2016.07.063] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 07/21/2016] [Accepted: 07/25/2016] [Indexed: 01/09/2023]
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107
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Panich S, Haj Sleiman M, Steer I, Ladame S, Edel JB. Real-Time Monitoring of Ligand Binding to G-Quadruplex and Duplex DNA by Whispering Gallery Mode Sensing. ACS Sens 2016. [DOI: 10.1021/acssensors.6b00301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sirirat Panich
- Department of Chemistry and ‡Department of Bioengineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
| | - Mazen Haj Sleiman
- Department of Chemistry and ‡Department of Bioengineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
| | - Isobel Steer
- Department of Chemistry and ‡Department of Bioengineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
| | - Sylvain Ladame
- Department of Chemistry and ‡Department of Bioengineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
| | - Joshua B. Edel
- Department of Chemistry and ‡Department of Bioengineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
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108
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Pradeep TP, Barthwal R. NMR structure of dual site binding of mitoxantrone dimer to opposite grooves of parallel stranded G-quadruplex [d-(TTGGGGT)]4. Biochimie 2016; 128-129:59-69. [DOI: 10.1016/j.biochi.2016.07.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 07/11/2016] [Indexed: 12/27/2022]
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109
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Recent advances in targeting the telomeric G-quadruplex DNA sequence with small molecules as a strategy for anticancer therapies. Future Med Chem 2016; 8:1259-90. [PMID: 27442231 DOI: 10.4155/fmc-2015-0017] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Human telomeric DNA (hTelo), present at the ends of chromosomes to protect their integrity during cell division, comprises tandem repeats of the sequence d(TTAGGG) which is known to form a G-quadruplex secondary structure. This unique structural formation of DNA is distinct from the well-known helical structure that most genomic DNA is thought to adopt, and has recently gained prominence as a molecular target for new types of anticancer agents. In particular, compounds that can stabilize the intramolecular G-quadruplex formed within the human telomeric DNA sequence can inhibit the activity of the enzyme telomerase which is known to be upregulated in tumor cells and is a major contributor to their immortality. This provides the basis for the discovery and development of small molecules with the potential for selective toxicity toward tumor cells. This review summarizes the various families of small molecules reported in the literature that have telomeric quadruplex stabilizing properties, and assesses the potential for compounds of this type to be developed as novel anticancer therapies. A future perspective is also presented, emphasizing the need for researchers to adopt approaches that will allow the discovery of molecules with more drug-like properties in order to improve the chances of lead molecules reaching the clinic in the next decade.
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110
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Jiang Y, Chen AC, Kuang GT, Wang SK, Ou TM, Tan JH, Li D, Huang ZS. Design, synthesis and biological evaluation of 4-anilinoquinazoline derivatives as new c-myc G-quadruplex ligands. Eur J Med Chem 2016; 122:264-279. [PMID: 27372288 DOI: 10.1016/j.ejmech.2016.06.040] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 06/17/2016] [Accepted: 06/20/2016] [Indexed: 11/18/2022]
Abstract
A series of 4-anilinoquinazoline derivatives were designed and synthesized as novel c-myc promoter G-quadruplex binding ligands. Subsequent biophysical and biochemical evaluation demonstrated that the introduction of aniline group at 4-position of quinazoline ring and two side chains with terminal amino group improved their binding affinity and stabilizing ability to G-quadruplex DNA. RT-PCR assay and Western blot showed that compound 7a could down-regulate transcription and expression of c-myc gene in Hela cells, which was consistent with the behavior of an effective G-quadruplex ligand targeting c-myc oncogene. More importantly, RTCA and colony formation assays indicated that 7a obviously inhibited Hela cells proliferation, without influence on normal primary cultured mouse mesangial cells. Flow cytometric assays suggested that 7a induced Hela cells to arrest in G0/G1 phase both in a time-dependent and dose-dependent manner.
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Affiliation(s)
- Yin Jiang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Ai-Chun Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Guo-Tao Kuang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Shi-Ke Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Tian-Miao Ou
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Jia-Heng Tan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Ding Li
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China
| | - Zhi-Shu Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, People's Republic of China.
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111
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Sheu SY, Huang CH, Zhou JK, Yang DY. Relative stability of G-quadruplex structures: Interactions between the human Bcl2 promoter region and derivatives of carbazole and diphenylamine. Biopolymers 2016; 101:1038-50. [PMID: 24723333 DOI: 10.1002/bip.22497] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 04/07/2014] [Accepted: 04/07/2014] [Indexed: 01/24/2023]
Abstract
The bcl2 promoter region forms a G-quadruplex structure, which is a crucial target for anticancer drug development. In this study, we provide theoretical predictions of the stability of different G-quadruplex folds of the 23-mer bcl2 promoter region and G-quadruplex ligand. We take into account the whole G-quadruplex structure, including bound-cations and solvent effects, in order to compute the ligand binding free energy using molecular dynamics simulation. Two series of the carbazole and diphenylamine derivatives are used to screen for the most potent drug in terms of stabilization. The energy analysis identifies the predominant energy components affecting the stability of the various different G-quadruplex folds. The energy associated with the stability of the G-quadruplex-K(+) structures obtained displays good correlation with experimental Tm measurements. We found that loop orientation has an intrinsic influence on G-quadruplex stability and that the basket structure is the most stable. Furthermore, parallel loops are the most effective drug binding site. Our studies also demonstrate that rigidity and planarity are the key structural elements of a drug that stabilizes the G-quadruplex structure. BMVC-4 is the most potential G-quadruplex ligand. This approach demonstrates significant promise and should benefit drug design.
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Affiliation(s)
- Sheh-Yi Sheu
- Department of Life Sciences and Institute of Genome Sciences, National Yang-Ming University, Taipei, 112, Taiwan; Institute of Biomedical informatics, National Yang-Ming University, Taipei, 112, Taiwan
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112
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Pavan Kumar Y, Saha P, Saha D, Bessi I, Schwalbe H, Chowdhury S, Dash J. Fluorescent Dansyl-Guanosine Conjugates that Bindc-MYCPromoter G-Quadruplex and Downregulatec-MYCExpression. Chembiochem 2016; 17:388-93. [DOI: 10.1002/cbic.201500631] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Indexed: 01/15/2023]
Affiliation(s)
- Y. Pavan Kumar
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; Jadavpur University; 2A ∞ B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Puja Saha
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; Jadavpur University; 2A ∞ B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Dhurjhoti Saha
- CSIR-Institute of Genomics and Integrative Biology; Mathura Road Delhi 110 025 India
| | - Irene Bessi
- Institute of Organic Chemistry and Chemical Biology; Goethe University Frankfurt; and Center for Biomolecular Magnetic Resonance; Max-von-Laue Strasse 7 60438 Frankfurt am Main Germany
| | - Harald Schwalbe
- Institute of Organic Chemistry and Chemical Biology; Goethe University Frankfurt; and Center for Biomolecular Magnetic Resonance; Max-von-Laue Strasse 7 60438 Frankfurt am Main Germany
| | - Shantanu Chowdhury
- CSIR-Institute of Genomics and Integrative Biology; Mathura Road Delhi 110 025 India
| | - Jyotirmayee Dash
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; Jadavpur University; 2A ∞ B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
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113
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Felsenstein KM, Saunders LB, Simmons JK, Leon E, Calabrese DR, Zhang S, Michalowski A, Gareiss P, Mock BA, Schneekloth JS. Small Molecule Microarrays Enable the Identification of a Selective, Quadruplex-Binding Inhibitor of MYC Expression. ACS Chem Biol 2016; 11:139-48. [PMID: 26462961 PMCID: PMC4719142 DOI: 10.1021/acschembio.5b00577] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
![]()
The
transcription factor MYC plays a pivotal role in cancer initiation,
progression, and maintenance. However, it has proven difficult to
develop small molecule inhibitors of MYC. One attractive route to
pharmacological inhibition of MYC has been the prevention of its expression
through small molecule-mediated stabilization of the G-quadruplex
(G4) present in its promoter. Although molecules that bind globally
to quadruplex DNA and influence gene expression are well-known, the
identification of new chemical scaffolds that selectively modulate
G4-driven genes remains a challenge. Here, we report an approach for
the identification of G4-binding small molecules using small molecule
microarrays (SMMs). We use the SMM screening platform to identify
a novel G4-binding small molecule that inhibits MYC expression in
cell models, with minimal impact on the expression of other G4-associated
genes. Surface plasmon resonance (SPR) and thermal melt assays demonstrated
that this molecule binds reversibly to the MYC G4 with single digit
micromolar affinity, and with weaker or no measurable binding to other
G4s. Biochemical and cell-based assays demonstrated that the compound
effectively silenced MYC transcription and translation via a G4-dependent
mechanism of action. The compound induced G1 arrest and was selectively
toxic to MYC-driven cancer cell lines containing the G4 in the promoter
but had minimal effects in peripheral blood mononucleocytes or a cell
line lacking the G4 in its MYC promoter. As a measure of selectivity,
gene expression analysis and qPCR experiments demonstrated that MYC
and several MYC target genes were downregulated upon treatment with
this compound, while the expression of several other G4-driven genes
was not affected. In addition to providing a novel chemical scaffold
that modulates MYC expression through G4 binding, this work suggests
that the SMM screening approach may be broadly useful as an approach
for the identification of new G4-binding small molecules.
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Affiliation(s)
- Kenneth M. Felsenstein
- Laboratory
of Cancer Biology and Genetics, National Cancer Institute, Building
37, Room 3146, Bethesda, Maryland 20892-4258, United States
- NCI/JHU Molecular Targets and Drug Discovery Program, Baltimore, Maryland, United States
| | - Lindsey B. Saunders
- Chemical
Biology Laboratory, National Cancer Institute, Building 376, Room 225C, P.O. Box B, Frederick, Maryland 21702-1201, United States
| | - John K. Simmons
- Laboratory
of Cancer Biology and Genetics, National Cancer Institute, Building
37, Room 3146, Bethesda, Maryland 20892-4258, United States
| | - Elena Leon
- Laboratory
of Cancer Biology and Genetics, National Cancer Institute, Building
37, Room 3146, Bethesda, Maryland 20892-4258, United States
- NCI/JHU Molecular Targets and Drug Discovery Program, Baltimore, Maryland, United States
| | - David R. Calabrese
- Chemical
Biology Laboratory, National Cancer Institute, Building 376, Room 225C, P.O. Box B, Frederick, Maryland 21702-1201, United States
| | - Shuling Zhang
- Laboratory
of Cancer Biology and Genetics, National Cancer Institute, Building
37, Room 3146, Bethesda, Maryland 20892-4258, United States
| | - Aleksandra Michalowski
- Laboratory
of Cancer Biology and Genetics, National Cancer Institute, Building
37, Room 3146, Bethesda, Maryland 20892-4258, United States
| | - Peter Gareiss
- Yale Center for Molecular Discovery, West Haven, Connecticut, United States
| | - Beverly A. Mock
- Laboratory
of Cancer Biology and Genetics, National Cancer Institute, Building
37, Room 3146, Bethesda, Maryland 20892-4258, United States
| | - John S. Schneekloth
- Chemical
Biology Laboratory, National Cancer Institute, Building 376, Room 225C, P.O. Box B, Frederick, Maryland 21702-1201, United States
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114
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Lauri I, Savorani F, Iaccarino N, Zizza P, Pavone LM, Novellino E, Engelsen SB, Randazzo A. Development of an Optimized Protocol for NMR Metabolomics Studies of Human Colon Cancer Cell Lines and First Insight from Testing of the Protocol Using DNA G-Quadruplex Ligands as Novel Anti-Cancer Drugs. Metabolites 2016; 6:E4. [PMID: 26784246 PMCID: PMC4812333 DOI: 10.3390/metabo6010004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 01/07/2016] [Accepted: 01/11/2016] [Indexed: 02/06/2023] Open
Abstract
The study of cell lines by nuclear magnetic resonance (NMR) spectroscopy metabolomics represents a powerful tool to understand how the local metabolism and biochemical pathways are influenced by external or internal stimuli. In particular, the use of adherent mammalian cells is emerging in the metabolomics field in order to understand the molecular mechanism of disease progression or, for example, the cellular response to drug treatments. Hereto metabolomics investigations for this kind of cells have generally been limited to mass spectrometry studies. This study proposes an optimized protocol for the analysis of the endo-metabolome of human colon cancer cells (HCT116) by NMR. The protocol includes experimental conditions such as washing, quenching and extraction. In order to test the proposed protocol, it was applied to an exploratory study of cancer cells with and without treatment by anti-cancer drugs, such as DNA G-quadruplex binders and Adriamycin (a traditional anti-cancer drug). The exploratory NMR metabolomics analysis resulted in NMR assignment of all endo-metabolites that could be detected and provided preliminary insights about the biological behavior of the drugs tested.
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Affiliation(s)
- Ilaria Lauri
- Department of Pharmacy, University of Naples "Federico II", via D. Montesano 49, 80131 Naples, Italy.
| | - Francesco Savorani
- Spectroscopy & Chemometrics, Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark.
- Department of Applied Science and Technology (DISAT), Polytechnic University of Turin-Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - Nunzia Iaccarino
- Department of Pharmacy, University of Naples "Federico II", via D. Montesano 49, 80131 Naples, Italy.
| | - Pasquale Zizza
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, 00158 Rome, Italy.
| | - Luigi Michele Pavone
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", via S. Pansini 5, 80131 Naples, Italy.
| | - Ettore Novellino
- Department of Pharmacy, University of Naples "Federico II", via D. Montesano 49, 80131 Naples, Italy.
| | - Søren Balling Engelsen
- Spectroscopy & Chemometrics, Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark.
| | - Antonio Randazzo
- Department of Pharmacy, University of Naples "Federico II", via D. Montesano 49, 80131 Naples, Italy.
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115
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Mondal S, Jana J, Sengupta P, Jana S, Chatterjee S. Myricetin arrests human telomeric G-quadruplex structure: a new mechanistic approach as an anticancer agent. MOLECULAR BIOSYSTEMS 2016; 12:2506-18. [DOI: 10.1039/c6mb00218h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The use of small molecules to arrest G-quadruplex structure has become a potential strategy for the development and design of a new class of anticancer therapeutics.
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Affiliation(s)
- Soma Mondal
- Department of Biophysics
- Bose Institute
- Kolkata-700054
- India
| | - Jagannath Jana
- Department of Biophysics
- Bose Institute
- Kolkata-700054
- India
| | | | - Samarjit Jana
- Department of Zoology
- West Bengal State University
- Kolkata-126
- India
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116
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Alam MS, Lee DU. Synthesis, biological evaluation, drug-likeness, and in silico screening of novel benzylidene-hydrazone analogues as small molecule anticancer agents. Arch Pharm Res 2015; 39:191-201. [DOI: 10.1007/s12272-015-0699-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 12/12/2015] [Indexed: 01/22/2023]
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117
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Rhodes D, Lipps HJ. G-quadruplexes and their regulatory roles in biology. Nucleic Acids Res 2015; 43:8627-37. [PMID: 26350216 PMCID: PMC4605312 DOI: 10.1093/nar/gkv862] [Citation(s) in RCA: 1010] [Impact Index Per Article: 112.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 08/17/2015] [Indexed: 01/10/2023] Open
Abstract
‘If G-quadruplexes form so readily in vitro, Nature will have found a way of using them in vivo’ (Statement by Aaron Klug over 30 years ago). During the last decade, four-stranded helical structures called G-quadruplex (or G4) have emerged from being a structural curiosity observed in vitro, to being recognized as a possible nucleic acid based mechanism for regulating multiple biological processes in vivo. The sequencing of many genomes has revealed that they are rich in sequence motifs that have the potential to form G-quadruplexes and that their location is non-random, correlating with functionally important genomic regions. In this short review, we summarize recent evidence for the in vivo presence and function of DNA and RNA G-quadruplexes in various cellular pathways including DNA replication, gene expression and telomere maintenance. We also highlight remaining open questions that will have to be addressed in the future.
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Affiliation(s)
- Daniela Rhodes
- School of Biological Sciences, Nanyang Technological University, Proteos, 61 Biopolis Drive, 138673, Singapore Lee Kong Chian School of Medicine, Nanyang Technological University, Proteos, 61 Biopolis Drive, 138673, Singapore Nanyang Institute of Structural Biology, Nanyang Technological University, Proteos, 61 Biopolis Drive, 138673, Singapore
| | - Hans J Lipps
- Centre for biomedical education and research (ZBAF), Institute of Cell Biology, University Witten/Herdecke, Stockumer Str. 10, 58448, Witten, Germany
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118
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Chiorcea-Paquim AM, Rodrigues Pontinha AD, Oliveira-Brett AM. Quadruplex-targeting anticancer drug BRACO-19 voltammetric and AFM characterization. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.05.146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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119
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Assessment of selectivity of G-quadruplex ligands via an optimised FRET melting assay. Biochimie 2015; 115:194-202. [DOI: 10.1016/j.biochi.2015.06.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 06/06/2015] [Indexed: 11/18/2022]
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120
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Neidle S. A Personal History of Quadruplex-Small Molecule Targeting. CHEM REC 2015; 15:691-710. [DOI: 10.1002/tcr.201500011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Indexed: 01/15/2023]
Affiliation(s)
- Stephen Neidle
- UCL School of Pharmacy; University College London; 29-39 Brunswick Square London WC1N 1AX UK
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121
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Gao C, Zhang W, He S, Li S, Liu F, Jiang Y. Synthesis and antiproliferative activity of 2,7-diamino l0-(3,5-dimethoxy)benzyl-9(10H)-acridone derivatives as potent telomeric G-quadruplex DNA ligands. Bioorg Chem 2015; 60:30-6. [DOI: 10.1016/j.bioorg.2015.04.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 04/01/2015] [Accepted: 04/02/2015] [Indexed: 12/30/2022]
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122
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Artusi S, Nadai M, Perrone R, Biasolo MA, Palù G, Flamand L, Calistri A, Richter SN. The Herpes Simplex Virus-1 genome contains multiple clusters of repeated G-quadruplex: Implications for the antiviral activity of a G-quadruplex ligand. Antiviral Res 2015; 118:123-31. [PMID: 25843424 PMCID: PMC7113899 DOI: 10.1016/j.antiviral.2015.03.016] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 03/03/2015] [Accepted: 03/30/2015] [Indexed: 11/23/2022]
Abstract
Guanine-rich nucleic acids can fold into G-quadruplexes, secondary structures implicated in important regulatory functions at the genomic level in humans, prokaryotes and viruses. The remarkably high guanine content of the Herpes Simplex Virus-1 (HSV-1) genome prompted us to investigate both the presence of G-quadruplex forming sequences in the viral genome and the possibility to target them with G-quadruplex ligands to obtain anti-HSV-1 effects with a novel mechanism of action. Using biophysical, molecular biology and antiviral assays, we showed that the HSV-1 genome displays multiple clusters of repeated sequences that form very stable G-quadruplexes. These sequences are mainly located in the inverted repeats of the HSV-1 genome. Treatment of HSV-1 infected cells with the G-quadruplex ligand BRACO-19 induced inhibition of virus production. BRACO-19 was able to inhibit Taq polymerase processing at G-quadruplex forming sequences in the HSV-1 genome, and decreased intracellular viral DNA in infected cells. The last step targeted by BRACO-19 was viral DNA replication, while no effect on virus entry in the cells was observed. This work, presents the first evidence of extended G-quadruplex sites in key regions of the HSV-1 genome, indicates the possibility to block viral DNA replication by G-quadruplex-ligand and therefore provides a proof of concept for the use of G-quadruplex ligands as new anti-herpetic therapeutic options.
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Affiliation(s)
- Sara Artusi
- Department of Molecular Medicine, University of Padua, via Gabelli, 63, 35121 Padua, Italy
| | - Matteo Nadai
- Department of Molecular Medicine, University of Padua, via Gabelli, 63, 35121 Padua, Italy
| | - Rosalba Perrone
- Department of Molecular Medicine, University of Padua, via Gabelli, 63, 35121 Padua, Italy
| | - Maria Angela Biasolo
- Department of Molecular Medicine, University of Padua, via Gabelli, 63, 35121 Padua, Italy
| | - Giorgio Palù
- Department of Molecular Medicine, University of Padua, via Gabelli, 63, 35121 Padua, Italy
| | - Louis Flamand
- Department of Microbiology, Infectious Diseases and Immunology, Laval University, Quebec City, Quebec, Canada
| | - Arianna Calistri
- Department of Molecular Medicine, University of Padua, via Gabelli, 63, 35121 Padua, Italy
| | - Sara N Richter
- Department of Molecular Medicine, University of Padua, via Gabelli, 63, 35121 Padua, Italy.
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123
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Zhang B, Chen K, Wang N, Gao C, Sun Q, Li L, Chen Y, Tan C, Liu H, Jiang Y. Molecular design, synthesis and biological research of novel pyridyl acridones as potent DNA-binding and apoptosis-inducing agents. Eur J Med Chem 2015; 93:214-26. [DOI: 10.1016/j.ejmech.2015.02.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 12/19/2014] [Accepted: 02/05/2015] [Indexed: 11/17/2022]
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124
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Zhou Z, Li D, Zhang L, Wang E, Dong S. G-quadruplex DNA/protoporphyrin IX-based synergistic platform for targeted photodynamic cancer therapy. Talanta 2015; 134:298-304. [PMID: 25618671 DOI: 10.1016/j.talanta.2014.11.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 11/14/2014] [Accepted: 11/19/2014] [Indexed: 01/17/2023]
Abstract
Photodynamic therapy (PDT) is an emerging technique to induce cancer cell death. However, the tumor specificity, cellular uptake and biodistribution of many photosensitizers urgently need to be improved. In this regard, we show here that the integrated nanoassemblies based on G-quadruplex DNAs (GQDs)/protoporphyrin IX (PPIX) can serve as a synergistic platform for targeted high-performance PDT. In the nanoassemblies, GQDs function as carriers of sensitiser PPIX and confers the system cancer cell targeting ability. After nucleolin-mediated efficient binding and cellular uptake of GQDs/PPIX assemblies, the strong red fluorescence of GQDs/PPIX complex provides a powerful tool for biological imaging. Moreover, the reactive oxygen species (ROS) generated by GQDs/PPIX under light illumination can effectively kill cancer cells. The present approach is simply composed by DNA and photosensitizers, thereby avoiding any complicated and time-consuming covalent modification or chemical labeling procedure.
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Affiliation(s)
- Zhixue Zhou
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China Graduate School of the Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Dan Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China Graduate School of the Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Libing Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China Graduate School of the Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China Graduate School of the Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | - Shaojun Dong
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China Graduate School of the Chinese Academy of Sciences, Beijing 100039, People's Republic of China.
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125
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Xu L, Chen X, Wu J, Wang J, Ji L, Chao H. Dinuclear Ruthenium(II) Complexes That Induce and Stabilise G-Quadruplex DNA. Chemistry 2015; 21:4008-20. [DOI: 10.1002/chem.201405991] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Indexed: 11/08/2022]
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126
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127
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Davis KJ, Richardson C, Beck JL, Knowles BM, Guédin A, Mergny JL, Willis AC, Ralph SF. Synthesis and characterisation of nickel Schiff base complexes containing the meso-1,2-diphenylethylenediamine moiety: selective interactions with a tetramolecular DNA quadruplex. Dalton Trans 2015; 44:3136-50. [DOI: 10.1039/c4dt02926g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Two nickel(ii) Schiff base complexes exhibit binding selectivity for a tetramolecular DNA quadruplex.
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Affiliation(s)
| | | | | | | | | | | | - Anthony C. Willis
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
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128
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Chakraborty B, Mitra P, Basu S. Spectroscopic exploration of drug–protein interaction: a study highlighting the dependence of the magnetic field effect on inter-radical separation distance formed during photoinduced electron transfer. RSC Adv 2015. [DOI: 10.1039/c5ra13575c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The magnetic field effect can be used as a “spectroscopic ruler” to assess inter-radical separation distances in photoinduced electron transfer.
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Affiliation(s)
| | - Piyali Mitra
- Chemical Sciences Division
- Saha Institute of Nuclear Physics
- Kolkata
- India
| | - Samita Basu
- Chemical Sciences Division
- Saha Institute of Nuclear Physics
- Kolkata
- India
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129
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Stafford VS, Suntharalingam K, Shivalingam A, White AJP, Mann DJ, Vilar R. Syntheses of polypyridyl metal complexes and studies of their interaction with quadruplex DNA. Dalton Trans 2015; 44:3686-700. [DOI: 10.1039/c4dt02910k] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A series of metal complexes with substituted terpyridines show high affinity towards quadruplex DNA, particularly bimetallic (trpy)Pt/M(cyclen) complexes.
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Affiliation(s)
| | | | | | | | - David J. Mann
- Department of Life Sciences
- Imperial College London
- London SW7 2AZ
- UK
| | - Ramon Vilar
- Department of Chemistry
- Imperial College London
- London SW7 2AZ
- UK
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130
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In silico identification of novel ligands for G-quadruplex in the c-MYC promoter. J Comput Aided Mol Des 2014; 29:339-48. [PMID: 25527072 DOI: 10.1007/s10822-014-9826-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Accepted: 12/11/2014] [Indexed: 10/24/2022]
Abstract
G-quadruplex DNA formed in NHEIII1 region of oncogene promoter inhibits transcription of the genes. In this study, virtual screening combining pharmacophore-based search and structure-based docking screening was conducted to discover ligands binding to G-quadruplex in promoter region of c-MYC. Several hit ligands showed the selective PCR-arresting effects for oligonucleotide containing c-MYC G-quadruplex forming sequence. Among them, three hits selectively inhibited cell proliferation and decreased c-MYC mRNA level in Ramos cells, where NHEIII1 is included in translocated c-MYC gene for overexpression. Promoter assay using two kinds of constructs with wild-type and mutant sequences showed that interaction of these ligands with the G-quadruplex resulted in turning-off of the reporter gene. In conclusion, combined virtual screening methods were successfully used for discovery of selective c-MYC promoter G-quadruplex binders with anticancer activity.
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131
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Rouleau SG, Beaudoin JD, Bisaillon M, Perreault JP. Small antisense oligonucleotides against G-quadruplexes: specific mRNA translational switches. Nucleic Acids Res 2014; 43:595-606. [PMID: 25510493 PMCID: PMC4288198 DOI: 10.1093/nar/gku1311] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
G-quadruplexes (G4) are intricate RNA structures found throughout the transcriptome. Because they are associated with a variety of biological cellular mechanisms, these fascinating structural motifs are seen as potential therapeutic targets against many diseases. While screening of chemical compounds specific to G4 motifs has yielded interesting results, no single compound successfully discriminates between G4 motifs based on nucleotide sequences alone. This level of specificity is best attained using antisense oligonucleotides (ASO). Indeed, oligonucleotide-based strategies are already used to modulate DNA G4 folding in vitro. Here, we report that, in human cells, the use of short ASO to promote and inhibit RNA G4 folding affects the translation of specific mRNAs, including one from the 5'UTR of the H2AFY gene, a histone variant associated with cellular differentiation and cancer. These results suggest that the relatively high specificity of ASO-based strategies holds significant potential for applications aimed at modulating G4-motif folding.
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Affiliation(s)
- Samuel G Rouleau
- RNA Group/Groupe ARN, Département de biochimie, Faculté de médecine et des sciences de la santé, Pavillon de recherche appliquée sur le cancer, Université de Sherbrooke, Québec, J1E 4K8, Canada
| | - Jean-Denis Beaudoin
- RNA Group/Groupe ARN, Département de biochimie, Faculté de médecine et des sciences de la santé, Pavillon de recherche appliquée sur le cancer, Université de Sherbrooke, Québec, J1E 4K8, Canada
| | - Martin Bisaillon
- RNA Group/Groupe ARN, Département de biochimie, Faculté de médecine et des sciences de la santé, Pavillon de recherche appliquée sur le cancer, Université de Sherbrooke, Québec, J1E 4K8, Canada
| | - Jean-Pierre Perreault
- RNA Group/Groupe ARN, Département de biochimie, Faculté de médecine et des sciences de la santé, Pavillon de recherche appliquée sur le cancer, Université de Sherbrooke, Québec, J1E 4K8, Canada
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132
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Diveshkumar KV, Sakrikar S, Harikrishna S, Dhamodharan V, Pradeepkumar PI. Targeting promoter G-quadruplex DNAs by indenopyrimidine-based ligands. ChemMedChem 2014; 9:2754-65. [PMID: 25359695 DOI: 10.1002/cmdc.201402394] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Indexed: 11/07/2022]
Abstract
The formation of G-quadruplex structures can regulate telomerase activity and the expression of oncogenes at the transcriptional and translational levels. Therefore, stabilization of G-quadruplex DNA structures by small molecules has been recognized as a promising strategy for anticancer drug therapy. One of the major challenges in this field is to impart stabilizing molecules with selectivity toward quadruplex structures over duplex DNAs, and to maintain specificity toward a particular quadruplex topology. Herein we report the synthesis and binding interactions of indenopyrimidine derivatives, endowed with drug-like properties, with oncogenic promoters of c-myc and c-kit, telomeric and duplex DNAs. The results show specific stabilization of promoter over telomeric quadruplexes and duplex DNAs. Molecular modeling studies support the experimental observations by unraveling the dual binding mode of ligands by exploiting the top and bottom quartets of a G-quadruplex structure. This study underscores the potential of the indenopyrimidine scaffold, which can be used to achieve specific G-quadruplex-mediated anticancer activity.
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Affiliation(s)
- K V Diveshkumar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076 (India)
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133
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Xu B, Zhao C, Chen Y, Tateishi-Karimata H, Ren J, Sugimoto N, Qu X. Methyl Substitution Regulates the Enantioselectivity of Supramolecular Complex Binding to Human Telomeric G-Quadruplex DNA. Chemistry 2014; 20:16467-72. [DOI: 10.1002/chem.201404854] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Indexed: 01/23/2023]
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134
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Das RN, Debnath M, Gaurav A, Dash J. Environment-Sensitive Probes Containing a 2,6-Diethynylpyridine Motif for Fluorescence Turn-On Detection and Induction of Nanoarchitectures of Human Telomeric Quadruplex. Chemistry 2014; 20:16688-93. [DOI: 10.1002/chem.201404795] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Indexed: 12/24/2022]
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135
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Rizzo A, Iachettini S, Zizza P, Cingolani C, Porru M, Artuso S, Stevens M, Hummersone M, Biroccio A, Salvati E, Leonetti C. Identification of novel RHPS4-derivative ligands with improved toxicological profiles and telomere-targeting activities. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2014; 33:81. [PMID: 25288403 PMCID: PMC4193996 DOI: 10.1186/s13046-014-0081-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 09/22/2014] [Indexed: 02/07/2023]
Abstract
The pentacyclic acridinium salt RHPS4 (3,11-difluoro-6,8,13-trimethyl-8H-quino [4,3,2-kl] acridinium methosulfate, compound 1) is one of the most interesting DNA G-quadruplex binding molecules due to its high efficacy in tumor cell growth inhibition both in in vitro models and in vivo against human tumor xenografts in combination with conventional chemotherapeutics. Despite compound 1 having desirable chemical and pharmaceutical properties, its potential as a therapeutic agent is compromised by off-target effects on cardiovascular physiology. In this paper we report a new series of structurally-related compounds which were developed in an attempt to minimize its off-target profile, but maintaining the same favorable chemical and pharmacological features of the lead compound. By performing a comparative analysis it was possible to identify which derivatives had the following properties: (i) to show a reduced capacity in respect to compound 1 to inhibit the hERG tail current tested in a patch clamp assay and/or to interact with the human recombinant β2 receptor; (ii) to maintain both a good G4-binding affinity and cancer cell selectivity; and (iii) to trigger DNA damage with specific telomere uncapping. These studies allowed us to identify a novel G4-stabilizing molecule, compound 8, being characterized by reduced off-target effects and potent telomere on-target properties compared to the prototypic compound 1. Moreover, compound 8 shares with compound 1 the same molecular mode of action and an anti-tumour activity specifically restricted to replicating cells, as evident with its particularly efficient activity in combination therapy with a topoisomerase I inhibitor. In conclusion, we have identified a new pentacyclic derivative 8 having suitable properties to be the focus of further investigations as a clinical candidate for cancer therapy.
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Affiliation(s)
- Angela Rizzo
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Sara Iachettini
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Pasquale Zizza
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Chiara Cingolani
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Manuela Porru
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Simona Artuso
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Malcolm Stevens
- School of Pharmacy, University of Nottingham, Nottingham, NG7 2RD, UK.
| | - Marc Hummersone
- Pharminox Ltd, Biocity, Pennyfoot St, Nottingham, NG1 1GF, UK.
| | - Annamaria Biroccio
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Erica Salvati
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
| | - Carlo Leonetti
- Experimental Chemotherapy Laboratory, Regina Elena National Cancer Institute, via delle Messi d'Oro 156, 00158, Rome, Italy.
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136
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Pontinha ADR, Lombardo CM, Neidle S, Oliveira-Brett AM. Triazole-linked phenyl derivatives: redox mechanisms and in situ electrochemical evaluation of interaction with dsDNA. Bioelectrochemistry 2014; 101:97-105. [PMID: 25194950 DOI: 10.1016/j.bioelechem.2014.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 07/08/2014] [Accepted: 08/13/2014] [Indexed: 11/28/2022]
Abstract
The redox mechanism of two trisubstituted triazole-linked phenyl derivatives (CL41 and CL42) and a disubstituted triazole-linked phenyl derivative (CL2r50) were studied using cyclic, differential pulse and square wave voltammetry at a glassy carbon electrode. The CL41, CL42 and CL2r50 oxidation is a complex, pH-dependent irreversible process involving the formation of electroactive products that undergo two consecutive reversible oxidation reactions. The DNA interaction with CL41, CL42 and CL2r50 was investigated by differential pulse voltammetry using the dsDNA-electrochemical biosensor and in DNA/trisubstituted triazole incubated solutions. All three trisubstituted triazole-linked phenyl derivatives interacted with dsDNA causing morphological and oxidative damage to the dsDNA structure in a time-dependent manner. The DNA-electrochemical biosensor enabled the detection of oxidative damage to DNA following the occurrence of the 8-oxoGua and/or 2,8-oxoAde oxidation peaks.
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Affiliation(s)
- A Dora R Pontinha
- Department of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal
| | | | - Stephen Neidle
- UCL School of Pharmacy, University College London, London WC1N 1AX, UK
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137
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Perrone R, Butovskaya E, Daelemans D, Palù G, Pannecouque C, Richter SN. Anti-HIV-1 activity of the G-quadruplex ligand BRACO-19. J Antimicrob Chemother 2014; 69:3248-58. [PMID: 25103489 DOI: 10.1093/jac/dku280] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVES A dynamic G-quadruplex region has been previously shown to form in the long terminal repeat (LTR) promoter of the HIV-1 integrated DNA genome. Inhibition of promoter activity and antiviral effects have been observed when this region was stabilized by BRACO-19, a trisubstituted acridine derivative that binds G-quadruplexes. Here, we aimed at characterizing the antiviral mechanism of action of BRACO-19 by analysing its activity towards a broad range of HIV-1 strains, host cells and infection modes. METHODS The antiviral activity of BRACO-19 in cell lines and primary cells infected or persistently infected by HIV-1 strains was evaluated at different times post-infection. Virucidal, viral binding, time-dependent and drug-dependent assays were performed to identify the viral target step. Circular dichroism, UV spectroscopy and a reverse transcriptase (RT) stop assay were used to assess RNA G-quadruplex folding and inhibition of RT processing. RESULTS Thorough virological assays demonstrated that BRACO-19 acts both at the reverse transcription and the post-integration level during the virus life cycle. This behaviour was rationalized by the observation that a G-quadruplex-forming sequence identical to that of the LTR DNA is present at the 3'-end of the virus RNA genome. Biophysics and biomolecular testing showed that this region has the ability to fold into very stable G-quadruplex structures that are even more stabilized by BRACO-19, therefore inhibiting the reverse transcription process at the template level. CONCLUSIONS Our findings strongly support the activity of BRACO-19 at the viral G-quadruplex level and therefore strengthen the use of viral G-quadruplexes as new anti-HIV-1 targets.
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Affiliation(s)
- Rosalba Perrone
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Elena Butovskaya
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Dirk Daelemans
- Rega Institute for Medical Research, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Giorgio Palù
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | | | - Sara N Richter
- Department of Molecular Medicine, University of Padua, Padua, Italy
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138
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Müller S, Rodriguez R. G-quadruplex interacting small molecules and drugs: from bench toward bedside. Expert Rev Clin Pharmacol 2014; 7:663-79. [DOI: 10.1586/17512433.2014.945909] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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139
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DNA binders in clinical trials and chemotherapy. Bioorg Med Chem 2014; 22:4506-21. [DOI: 10.1016/j.bmc.2014.05.030] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Revised: 05/09/2014] [Accepted: 05/14/2014] [Indexed: 01/09/2023]
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140
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Li MJ, Lan TY, Lin ZS, Yi C, Chen GN. Synthesis, characterization, and DNA binding of a novel ligand and its Cu (II) complex. J Biol Inorg Chem 2014; 18:993-1003. [PMID: 24077729 DOI: 10.1007/s00775-013-1048-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 09/04/2013] [Indexed: 11/28/2022]
Abstract
A novel naphthalene-2,3-diamine-2-salicylaldehyde (NS) ligand and its mononuclear copper(II) complex (CuNS) have been synthesized and structurally characterized. The UV–vis absorption and emission spectra of NS showed obvious changes on addition of Cu2+ solution. The interaction of the compounds with calf thymus DNA and G-quadruplex DNA were investigated by spectroscopic methods and thermal melting assay. The nucleolytic cleavage activity of the compounds was investigated on double-stranded circular pBR322 plasmid DNA and G-quadruplex DNA by electrophoretic mobility shift assay. The results show that CuNS has a greater ability to stabilize G-quadruplex DNA over calf-thymus DNA. The cytotoxicity of the compounds toward HpeG2 cancer cells was also studied, and they showed significant potential for antineoplastic effects.
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141
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Small-molecule quadruplex-targeted drug discovery. Bioorg Med Chem Lett 2014; 24:2602-12. [DOI: 10.1016/j.bmcl.2014.04.029] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/06/2014] [Accepted: 04/08/2014] [Indexed: 01/24/2023]
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142
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Maji B, Bhattacharya S. Advances in the molecular design of potential anticancer agents via targeting of human telomeric DNA. Chem Commun (Camb) 2014; 50:6422-38. [DOI: 10.1039/c4cc00611a] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Telomerase is an attractive drug target to develop new generation drugs against cancer.
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Affiliation(s)
- Basudeb Maji
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore-560012, India
| | - Santanu Bhattacharya
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore-560012, India
- Chemical Biology Unit
- Jawaharlal Nehru Centre for Advanced Scientific Research
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143
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Saito A, Hanzawa Y. Catalytic Consecutive Reactions of Alkynes for Syntheses of Heterocycles. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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144
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Terenzi A, Bonsignore R, Spinello A, Gentile C, Martorana A, Ducani C, Högberg B, Almerico AM, Lauria A, Barone G. Selective G-quadruplex stabilizers: Schiff-base metal complexes with anticancer activity. RSC Adv 2014. [DOI: 10.1039/c4ra05355a] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Molecular dynamics simulations and quantum mechanics/molecular mechanics calculations provided a mechanism for G-quadruplex binding of three transition metal complexes.
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Affiliation(s)
- Alessio Terenzi
- Dipartimento di Scienze e Tecnologie Biologiche
- 90128 Palermo, Italy
| | | | - Angelo Spinello
- Dipartimento di Scienze e Tecnologie Biologiche
- 90128 Palermo, Italy
| | - Carla Gentile
- Dipartimento di Scienze e Tecnologie Biologiche
- 90128 Palermo, Italy
| | | | - Cosimo Ducani
- Swedish Medical Nanoscience Center
- Department of Neuroscience
- Karolinska Institutet
- Stockholm, Sweden
| | - Björn Högberg
- Swedish Medical Nanoscience Center
- Department of Neuroscience
- Karolinska Institutet
- Stockholm, Sweden
| | | | - Antonino Lauria
- Dipartimento di Scienze e Tecnologie Biologiche
- 90128 Palermo, Italy
| | - Giampaolo Barone
- Dipartimento di Scienze e Tecnologie Biologiche
- 90128 Palermo, Italy
- Istituto EuroMediterraneo di Scienza e Tecnologia
- 90139 Palermo, Italy
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145
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Zheng YC, Zheng ML, Chen S, Zhao ZS, Duan XM. Biscarbazolylmethane-based cyanine: a two-photon excited fluorescent probe for DNA and selective cell imaging. J Mater Chem B 2014; 2:2301-2310. [DOI: 10.1039/c3tb21860k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a novel biscarbazole-based cyanine with a large Stokes shift and TPA cross-section as a light-up probe for DNA and selective TPEF cell imaging.
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Affiliation(s)
- Yong-Chao Zheng
- Laboratory of Organic NanoPhotonics and Key Laboratory of Functional Crystals and Laser Technology
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
- University of Chinese Academy of Sciences
| | - Mei-Ling Zheng
- Laboratory of Organic NanoPhotonics and Key Laboratory of Functional Crystals and Laser Technology
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
| | - Shu Chen
- Laboratory of Organic NanoPhotonics and Key Laboratory of Functional Crystals and Laser Technology
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
- University of Chinese Academy of Sciences
| | - Zhen-Sheng Zhao
- Laboratory of Organic NanoPhotonics and Key Laboratory of Functional Crystals and Laser Technology
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
| | - Xuan-Ming Duan
- Laboratory of Organic NanoPhotonics and Key Laboratory of Functional Crystals and Laser Technology
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190, P. R. China
- Chongqing Institute of Green and Intelligent Technology
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146
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Targeting human telomeric G-quadruplex DNA and inhibition of telomerase activity with [(dmb)2Ru(obip)Ru(dmb)2](4+). PLoS One 2013; 8:e84419. [PMID: 24386376 PMCID: PMC3874006 DOI: 10.1371/journal.pone.0084419] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 11/14/2013] [Indexed: 11/19/2022] Open
Abstract
Inhibition of telomerase by inducing/stabilizing G-quadruplex formation is a promising strategy to design new anticancer drugs. We synthesized and characterized a new dinuclear complex [(dmb)2Ru(obip)Ru(dmb)2]4+ (dmb = 4,4’-dimethyl-2,2’-bipyridine, obip = (2-(2-pyridyl)imidazo[4,5-f][1,10]phenanthroline) with high affinity for both antiparallel and mixed parallel / antiparallel G-quadruplex DNA. This complex can promote the formation and stabilize G-quadruplex DNA. Dialysis and TRAP experiments indicated that [(dmb)2Ru(obip)Ru(dmb)2]4+ acted as an excellent telomerase inhibitor due to its obvious selectivity for G-quadruplex DNA rather than double stranded DNA. In vitro co-culture experiments implied that [(dmb)2Ru(obip)Ru(dmb)2]4+ inhibited telomerase activity and hindered cancer cell proliferation without side effects to normal fibroblast cells. TUNEL assay indicated that inhibition of telomerase activity induced DNA cleavage further apoptosis in cancer cells. Therefore, RuII complex represents an exciting opportunity for anticancer drug design by specifically targeting cancer cell G-quadruplexes DNA.
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147
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Zhao C, Wu L, Ren J, Xu Y, Qu X. Targeting Human Telomeric Higher-Order DNA: Dimeric G-Quadruplex Units Serve as Preferred Binding Site. J Am Chem Soc 2013; 135:18786-9. [DOI: 10.1021/ja410723r] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Chuanqi Zhao
- Division
of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth
Resource Utilization and Laboratory of Chemical Biology, Changchun
Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Li Wu
- Division
of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth
Resource Utilization and Laboratory of Chemical Biology, Changchun
Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Jinsong Ren
- Division
of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth
Resource Utilization and Laboratory of Chemical Biology, Changchun
Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Yan Xu
- Division
of Chemistry, Department of Medical Sciences, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Xiaogang Qu
- Division
of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth
Resource Utilization and Laboratory of Chemical Biology, Changchun
Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
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148
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Kar RK, Suryadevara P, Jana J, Bhunia A, Chatterjee S. Novel G-quadruplex stabilizing agents: in-silico approach and dynamics. J Biomol Struct Dyn 2013; 31:1497-518. [DOI: 10.1080/07391102.2012.742246] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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149
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Altieri A, Alvino A, Ohnmacht S, Ortaggi G, Neidle S, Nocioni D, Franceschin M, Bianco A. Xanthene and xanthone derivatives as G-quadruplex stabilizing ligands. Molecules 2013; 18:13446-70. [PMID: 24177701 PMCID: PMC6269716 DOI: 10.3390/molecules181113446] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 10/21/2013] [Accepted: 10/23/2013] [Indexed: 12/14/2022] Open
Abstract
Following previous studies on anthraquinone and acridine-based G-quadruplex ligands, here we present a study of similar aromatic cores, with the specific aim of increasing G-quadruplex binding and selectivity with respect to duplex DNA. Synthesized compounds include two and three-side chain xanthone and xanthene derivatives, as well as a dimeric “bridged” form. ESI and FRET measurements suggest that all the studied molecules are good G-quadruplex ligands, both at telomeres and on G-quadruplex forming sequences of oncogene promoters. The dimeric compound and the three-side chain xanthone derivative have been shown to represent the best compounds emerging from the different series of ligands presented here, having also high selectivity for G-quadruplex structures with respect to duplex DNA. Molecular modeling simulations are in broad agreement with the experimental data.
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Affiliation(s)
- Alessandro Altieri
- Dipartimento di Chimica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, Roma 00185, Italy; E-Mails: (A.A.); (G.O.); (D.N.); (M.F.)
- Authors to whom correspondence should be addressed; E-Mails: (A.A.); (A.B.); Tel.: +39-064-991-3229/3622 (A.A. & A.B.) Fax: +39-064-991-3841 (A.A. & A.B.)
| | - Antonello Alvino
- Dipartimento di Chimica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, Roma 00185, Italy; E-Mails: (A.A.); (G.O.); (D.N.); (M.F.)
| | - Stephan Ohnmacht
- The UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK; E-Mails: (S.O.); (S.N.)
| | - Giancarlo Ortaggi
- Dipartimento di Chimica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, Roma 00185, Italy; E-Mails: (A.A.); (G.O.); (D.N.); (M.F.)
| | - Stephen Neidle
- The UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK; E-Mails: (S.O.); (S.N.)
| | - Daniele Nocioni
- Dipartimento di Chimica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, Roma 00185, Italy; E-Mails: (A.A.); (G.O.); (D.N.); (M.F.)
| | - Marco Franceschin
- Dipartimento di Chimica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, Roma 00185, Italy; E-Mails: (A.A.); (G.O.); (D.N.); (M.F.)
| | - Armandodoriano Bianco
- Dipartimento di Chimica, Università di Roma “La Sapienza”, Piazzale Aldo Moro 5, Roma 00185, Italy; E-Mails: (A.A.); (G.O.); (D.N.); (M.F.)
- Authors to whom correspondence should be addressed; E-Mails: (A.A.); (A.B.); Tel.: +39-064-991-3229/3622 (A.A. & A.B.) Fax: +39-064-991-3841 (A.A. & A.B.)
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150
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Xu CX, Zheng YX, Zheng XH, Hu Q, Zhao Y, Ji LN, Mao ZW. V-shaped dinuclear Pt(II) complexes: selective interaction with human telomeric G-quadruplex and significant inhibition towards telomerase. Sci Rep 2013; 3:2060. [PMID: 23792883 PMCID: PMC3690394 DOI: 10.1038/srep02060] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 06/04/2013] [Indexed: 01/29/2023] Open
Abstract
A quaternized trigeminal ligand, 4-[4,6-di(4-pyridyl)-1,3,5-(2-triazinyl)]-1-methylpyridine-1-ium hexafluorophosphate (dptmp·PF6), and two derivative V-shaped dinuclear Pt(II) complexes, {[Pt(dien)]₂(dptmp)}(PF₆)₅ (1) and {[Pt(dpa)]₂(dptmp)}(PF₆)₅ (2), were synthesized, characterized and applied to a series of biochemical studies. FRET and SPR analyses showed these compounds, especially Pt(II) complexes, bound more strongly to human telomeric (hTel) G-quadruplex than to promoters (such as c-myc and bcl2) or to the duplex DNA. PCR-stop assays revealed that the Pt(II) complexes could bind to and stabilize G-quadruplex far more effectively than corresponding ligand. CD analyses further indicated the three compounds likely stabilized the formation of mixed-type parallel/antiparallel G-quadruplex structures. Their efficacy as telomerase inhibitors and potential anticancer drugs was explored via TRAP. The IC₅₀ value was determined to be 0.113 ± 0.019 μM for 1, indicating that it is one of the strongest known telomerase inhibitors. These results confirm that both V-shaped dinuclear Pt(II) complexes act as selective G-quadruplex binders and significant telomerase inhibitors.
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Affiliation(s)
- Cui-Xia Xu
- 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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