1
|
Obitz D, Miller RG, Metzler-Nolte N. Synthesis and DNA interaction studies of Ru(II) cell penetrating peptide (CPP) bioconjugates. Dalton Trans 2021; 50:13768-13777. [PMID: 34549219 DOI: 10.1039/d1dt01776d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The synthesis of the first bioconjugates of a set of ruthenium(II) dipyridophenazine complexes with two different cell penetrating peptides (CPPs) is described. The CPPs, an arginine rich TAT-9 (RKKRRQRRR) sequence and the Xentry peptide (LCLRPVG), were synthesized using standard SPPS protocols, and the bioconjugates were obtained by the microwave-assisted coupling of the HOBt/TBTU preactivated metal complexes with the respective peptides on Wang resin. The racemic metal complexes were obtained by modified literature procedures. The bioconjugates were cleaved from the resin, purified by semi-preparative HPLC and characterized by analytical HPLC, high resolution mass spectrometry (HR-MS), and NMR spectroscopy. Despite the bioconjugation of the peptides to the dppz ligand, DNA intercalation was observed by CD spectroscopy, viscometry and the characteristic switch-on fluorescence of this class of compounds. Furthermore, the cellular uptake of the Xentry bioconjugates was confirmed by live cell imaging. Like the parent metal complexes, the bioconjugates show low in vitro cytotoxicity (IC50 > 80 μM), which is similar to the respective metal complexes alone.
Collapse
Affiliation(s)
- Daniel Obitz
- Inorganic Chemistry I - Bioinorganic Chemistry, Ruhr-University Bochum, Universitaetsstrasse 150, 44780 Bochum, Germany.
| | - Reece G Miller
- Inorganic Chemistry I - Bioinorganic Chemistry, Ruhr-University Bochum, Universitaetsstrasse 150, 44780 Bochum, Germany.
| | - Nils Metzler-Nolte
- Inorganic Chemistry I - Bioinorganic Chemistry, Ruhr-University Bochum, Universitaetsstrasse 150, 44780 Bochum, Germany.
| |
Collapse
|
2
|
Adak P, Ghosh B, Bauzá A, Frontera A, Herron SR, Chattopadhyay SK. Binuclear and tetranuclear Zn(ii) complexes with thiosemicarbazones: synthesis, X-ray crystal structures, ATP-sensing, DNA-binding, phosphatase activity and theoretical calculations. RSC Adv 2020; 10:12735-12746. [PMID: 35492083 PMCID: PMC9051056 DOI: 10.1039/c9ra10549b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 03/13/2020] [Indexed: 11/21/2022] Open
Abstract
Two Zinc(ii) complexes [Zn4(L1)4]·2H2O (1) and [Zn2(L2)2]·2H2O (2) of pyruvaldehydethiosemicarbazone ligands are reported. The complexes were characterized by elemental analysis, IR, NMR, UV-vis spectroscopy and by single-crystal X-ray crystallography. X-ray crystal structure determinations of the complexes show that though Zn : ligand stoichiometry is 1 : 1 in both the complexes, the molecular unit is tetranuclear for 1 and binuclear for 2. Both the complexes show selective sensing of ATP at pH 7.4 (0.01 M HEPES) in CH3CN–H2O (9 : 1) medium in the presence of other anions like AcO−, NO3−, F−, Cl−, H2PO4−, HPO42− and P2O72−. The UV-titration experiments of complexes 1 and 2 with ATP results in binding constants of 2.0(±0.07) × 104 M−1 and 7.1(±0.05) × 103 M−1 respectively. The calculated detection limits of 6.7 μM and 1.7 μM for 1 and 2 respectively suggest that the complexes are sensitive detectors of ATP. High selectivity of the complexes is confirmed by the addition of ATP in presence of an excess of other anions. DFT studies confirm that the ATP complexes are more favorable than those with the other inorganic phosphate anions, in agreement with the experimental results. Phosphatase like activity of both complexes is investigated spectrophotometrically using 4-nitrophenylphosphate (NPP) as a substrate, indicating the complexes possess significant phosphate ester hydrolytic efficiency. The kinetics for the hydrolysis of the substrate NPP was studied by the initial rate method at 25 °C. Michaelis–Menten derived kinetic parameters indicate that rate of hydrolysis of the P–O bond by complex 1 is much greater than that of complex 2, the kcat values being 212(±5) and 38(±2) h−1 respectively. The DNA binding studies of the complexes were investigated using electronic absorption spectroscopy and fluorescence quenching. The absorption spectral titrations of the complexes with DNA indicate that the CT-DNA binding affinity (Kb) of complex 1 (2.10(±0.07) × 106 M−1) is slightly greater than that of 2 (1.11(±0.04) × 106 M−1). From fluorescence spectra the apparent binding constant (Kapp) values were calculated and they are found to be 5.41(±0.01) × 105 M−1 for 1 and 3.93(±0.02) × 105 M−1 for 2. The molecular dynamics simulation demonstrates that the Zn(ii) complex 1 is a good intercalator of DNA. A binuclear and a tetranuclear zinc(ii) of pyruvaldehyde thiosemicarbazone show selective sensing of ATP at pH 7.4 (0.01 M HEPES) in CH3CN–H2O (9 : 1) medium. The DNA binding and phosphatase activities of the complexes are also reported.![]()
Collapse
Affiliation(s)
- Piyali Adak
- Department of Chemistry, Indian Institute of Engineering Science and Technology Shibpur Howarh-711 103 India
| | - Bipinbihari Ghosh
- Department of Chemistry, Indian Institute of Engineering Science and Technology Shibpur Howarh-711 103 India
| | - Antonio Bauzá
- Department of Chemistry, University of the Balearic Islands Carretera de Valldemossa km 7.5 07122 Palma de Mallorca IllesBalears Spain
| | - Antonio Frontera
- Department of Chemistry, University of the Balearic Islands Carretera de Valldemossa km 7.5 07122 Palma de Mallorca IllesBalears Spain
| | - Steven R Herron
- Department of Chemistry, Utah Valley University 800W University Pkwy Orem UT 84058 USA
| | - Shyamal Kumar Chattopadhyay
- Department of Chemistry, Indian Institute of Engineering Science and Technology Shibpur Howarh-711 103 India
| |
Collapse
|
3
|
Zhang SQ, Meng TT, Li J, Hong F, Liu J, Wang Y, Gao LH, Zhao H, Wang KZ. Near-IR/Visible-Emitting Thiophenyl-Based Ru(II) Complexes: Efficient Photodynamic Therapy, Cellular Uptake, and DNA Binding. Inorg Chem 2019; 58:14244-14259. [DOI: 10.1021/acs.inorgchem.9b02420] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Si-Qi Zhang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Ting-Ting Meng
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
- College of Science, Liaoning Technical University, Fuxin 123000, People’s Republic of China
| | - Jia Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Fan Hong
- Beijing Key Laboratory of Gene Resource and Molecular Development, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Jin Liu
- Beijing Key Laboratory of Gene Resource and Molecular Development, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Youjun Wang
- Beijing Key Laboratory of Gene Resource and Molecular Development, Beijing Normal University, Beijing 100875, People’s Republic of China
| | - Li-Hua Gao
- School of Science, Beijing Technology and Business University, Beijing 100048, People’s Republic of China
| | - Hua Zhao
- School of Science, Beijing Technology and Business University, Beijing 100048, People’s Republic of China
| | - Ke-Zhi Wang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China
| |
Collapse
|
4
|
Zhan JL, Wu MW, Wei D, Wei BY, Jiang Y, Yu W, Han B. 4-HO-TEMPO-Catalyzed Redox Annulation of Cyclopropanols with Oxime Acetates toward Pyridine Derivatives. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00832] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jun-Long Zhan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Meng-Wei Wu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Dian Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bang-Yi Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yu Jiang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| |
Collapse
|
5
|
Liu X, Huang J, Tang Y, Shen Y, Lu J. Topoisomerase I inhibitory and photocleavage activity of non-dppz DNA ‘light switches’ based on ruthenium complexes containing nitro group. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- XueWen Liu
- College of Chemistry and Material Engineering; Hunan University of Arts and Science; ChangDe 415000 China
| | - Jie Huang
- College of Chemistry and Material Engineering; Hunan University of Arts and Science; ChangDe 415000 China
| | - YuXuan Tang
- College of Chemistry and Material Engineering; Hunan University of Arts and Science; ChangDe 415000 China
| | - YouMing Shen
- College of Chemistry and Material Engineering; Hunan University of Arts and Science; ChangDe 415000 China
| | - JiLin Lu
- College of Chemistry and Material Engineering; Hunan University of Arts and Science; ChangDe 415000 China
| |
Collapse
|
6
|
Liu YH, Li A, Shao J, Xie CZ, Song XQ, Bao WG, Xu JY. Four Cu(ii) complexes based on antitumor chelators: synthesis, structure, DNA binding/damage, HSA interaction and enhanced cytotoxicity. Dalton Trans 2018; 45:8036-49. [PMID: 27071545 DOI: 10.1039/c6dt00451b] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Four novel copper(ii) complexes [Cu(II)(Bp4mT)(μ-Cl)]2 (), [Cu(II)(μ-Bp4mT)Br]2 (), [Cu(II)(HBpT)Cl] (), and [Cu(II)(HBpT)Br] () (Bp4mT = 2-benzoylpyridine-4-methylthiosemicarbazone, HBpT = 2-benzoylpyridine thiosemicarbazone), were synthesized and characterized using single-crystal X-ray diffraction, elemental analysis, infrared, and ultraviolet-visible spectroscopy. X-ray analysis revealed that complexes and based on the Bp4mT ligand presented dimeric structures in which the Cu(ii) ions were located in a five-coordinated distorted square-pyramidal geometry, whereas both and complexes were mononuclear with the Cu(ii) ions exhibiting a tetracoordinated square planar configuration. Their interactions with calf thymus DNA (CT-DNA) were investigated using viscosity measurements and fluorescence spectroscopy. Multispectroscopic evidence has shown interactions between these complexes and human serum albumin (HSA). All these complexes have exhibited efficient oxidative cleavage of supercoiled DNA in the presence of hydrogen peroxide, presumably via an oxidative mechanism. Furthermore, in vitro cytotoxicity studies of against human liver hepatocellular carcinoma cells (HepG-2), human large cell lung carcinoma cells (NCI-H460), and human cervical carcinoma cells (HeLa) indicated their promising antitumor activity with quite low IC50 values in the range of 0.08-1.98 μM, which are 83 times lower than those of cisplatin. The mechanistic studies revealed that four complexes, which induced early apoptosis, were involved in reactive oxygen species generation and DNA cleavage for their antitumor activities.
Collapse
Affiliation(s)
- Ya-Hong Liu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Ang Li
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Jia Shao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Cheng-Zhi Xie
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Xue-Qing Song
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Wei-Guo Bao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| | - Jing-Yuan Xu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, P. R. China.
| |
Collapse
|
7
|
Comparative studies on DNA-binding and in vitro antitumor activity of enantiomeric ruthenium(II) complexes. J Inorg Biochem 2018; 180:54-60. [DOI: 10.1016/j.jinorgbio.2017.11.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 10/31/2017] [Accepted: 11/26/2017] [Indexed: 02/07/2023]
|
8
|
Synthesis, structure, DFT calculations, electrochemistry, fluorescence, DNA binding and molecular docking aspects of a novel oxime based ligand and its palladium(II) complex. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 160:336-46. [DOI: 10.1016/j.jphotobiol.2016.04.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 04/22/2016] [Accepted: 04/26/2016] [Indexed: 11/18/2022]
|
9
|
Gu PY, Wang Z, Zhang Q. Azaacenes as active elements for sensing and bio applications. J Mater Chem B 2016; 4:7060-7074. [DOI: 10.1039/c6tb02052f] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent progress in the application of azaacenes in sensing and bio-fields has been summarized.
Collapse
Affiliation(s)
- Pei-Yang Gu
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Zilong Wang
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
| | - Qichun Zhang
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore 639798
- Singapore
- Division of Chemistry and Biological Chemistry
| |
Collapse
|
10
|
Ruthenium(II) bipyridine complexes with pendant anthracenyl and naphthyl moieties: A strategy for a ROS generator with DNA binding selectivity. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2015.09.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
11
|
Liu XW, Shen YM, Shu JS, Xiao Y, Zhang SB, Lu JL. DNA Interaction, Photocleavage and Topoisomerase I Inhibition by Ru(II) Complex with a New Ligand Possessing Phenazine Unit. J Fluoresc 2015; 25:1527-35. [DOI: 10.1007/s10895-015-1644-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 08/06/2015] [Indexed: 12/14/2022]
|
12
|
Cheng F, He C, Ren M, Wang F, Yang Y. Two dinuclear Ru(II) polypyridyl complexes with different photophysical and cation recognition properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt B:845-851. [PMID: 25459607 DOI: 10.1016/j.saa.2014.09.103] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/21/2014] [Accepted: 09/11/2014] [Indexed: 06/04/2023]
Abstract
Two dinuclear Ru(II) polypyridyl complexes functionalized with vacant coordination sites have been designed and synthesized. Their photophysical properties and interactions with various metal ions have been investigated at room temperature. The two complexes exhibit different UV/Vis absorption and emission intensities. When titrated with various metal ions, complex [{Ru(bpy)2}2(μ2-L(1))](4+) exhibits a notable fluorescence quenching in the presence of Cu(2+) in H2O-CH3CN media (1:1, v/v); its analogous complex [{Ru(bpy)2}2(μ2-L(2))](4+) exhibits no cation selectivity, the fluorescence intensity of complex [{Ru(bpy)2}2(μ2-L(2))](4+) has been enhanced by several transition metal ions due to prevention of the photo-induced electron transfer process. The fluorescence titration spectra and Benesi-Hildebrand expression reveal the formation of a 1:1 bonding mode between [{Ru(bpy)2}2(μ2-L(1))](4+) and Cu(2+) ion with the association constant of 5.50×10(4) M(-1).
Collapse
Affiliation(s)
- Feixiang Cheng
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655011, PR China.
| | - Chixian He
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655011, PR China
| | - Mingli Ren
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655011, PR China
| | - Fan Wang
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655011, PR China
| | - Yuting Yang
- College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655011, PR China
| |
Collapse
|
13
|
Synthesis, DNA binding and photocleavage, and cellular uptake of an alkyl chain-linked dinuclear ruthenium(II) complex. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 143:89-99. [DOI: 10.1016/j.jphotobiol.2015.01.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 01/04/2015] [Accepted: 01/05/2015] [Indexed: 02/05/2023]
|
14
|
Zhao XL, Li ZS, Zhang AG, Liu P, Song XM, Wang KZ. pH and DNA luminescence switching, DNA photocleavage and cytotoxic properties of two thiophene-containing ruthenium(II) complexes. Eur J Med Chem 2014; 87:10-22. [DOI: 10.1016/j.ejmech.2014.09.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Revised: 08/03/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
|
15
|
Zheng ZB, Wu YQ, Wang KZ, Li F. pH luminescence switching, dihydrogen phosphate sensing, and cellular uptake of a heterobimetallic ruthenium(II)-rhenium(I) complex. Dalton Trans 2014; 43:3273-84. [PMID: 24356444 DOI: 10.1039/c3dt52568f] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A new heterobimetallic ruthenium(II)-rhenium(I) complex of [Ru(bpy)2(HL)Re(CO)3Cl](ClO4)2·6H2O (RuHLRe) {bpy = 2,2'-bipyridine and HL = 2-(4-(2,6-di(pyridin-2-yl)pyridin-4-yl)phenyl)-1H-imidazo[4,5-f][1,10]phenanthroline} was synthesised and characterised by elemental analysis, proton nuclear magnetic resonance spectroscopy, and mass spectrometry. The ground- and excited-state acid-base properties of RuHLRe were studied using UV-Vis absorption spectrophotometric and spectrofluorimetric titrations in a 100 : 1 (v/v) Britton-Robinson buffer-CH3CN solution combined with luminescence lifetime measurements. The complex exhibited two-step separate protonation-deprotonation processes in both the ground and excited states. The complex acted as pH-induced "off-on-off" luminescence switches (I(on)/I(off) = 31.0 and 14.6), with one of the switching actions being driven by pH variations over the physiological pH range (5.3-8.0). Importantly, cellular imaging and cytotoxicity experiments demonstrated that RuHLRe rapidly and selectively illuminated the membrane of HeLa cells over fixed cells and exhibited reduced cytotoxicity at the imaging concentration compared to the Re(I)-free parent Ru(II) complex. In addition, RuHLRe acted as an efficient "turn on" emission sensor for H2PO4(-) and "turn off" emission sensor for F(-) and OAc(-).
Collapse
Affiliation(s)
- Ze-Bao Zheng
- College of Chemistry, Beijing Normal University, Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing 100875, P.R. China
| | | | | | | |
Collapse
|
16
|
Spectroscopic and Chemometrics Analysis of the Hydrolytic Process of Folpet and Its Interaction with DNA. J SOLUTION CHEM 2014. [DOI: 10.1007/s10953-014-0211-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
17
|
Zhang S, Ding Y, Wei H. Ruthenium polypyridine complexes combined with oligonucleotides for bioanalysis: a review. Molecules 2014; 19:11933-87. [PMID: 25116805 PMCID: PMC6271144 DOI: 10.3390/molecules190811933] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 07/17/2014] [Accepted: 07/28/2014] [Indexed: 02/01/2023] Open
Abstract
Ruthenium complexes are among the most interesting coordination complexes and they have attracted great attention over the past decades due to their appealing biological, catalytic, electronic and optical properties. Ruthenium complexes have found a unique niche in bioanalysis, as demonstrated by the substantial progress made in the field. In this review, the applications of ruthenium complexes coordinated with polypyridine ligands (and analogues) in bioanalysis are discussed. Three main detection methods based on electrochemistry, electrochemiluminescence, and photoluminscence are covered. The important targets, including DNA and other biologically important targets, are detected by specific biorecognition with the corresponding oligonucleotides as the biorecognition elements (i.e., DNA is probed by its complementary strand and other targets are detected by functional nucleic acids, respectively). Selected examples are provided and thoroughly discussed to highlight the substantial progress made so far. Finally, a brief summary with perspectives is included.
Collapse
Affiliation(s)
- Shuyu Zhang
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
| | - Yubin Ding
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
| | - Hui Wei
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
| |
Collapse
|
18
|
Coban B, Yildiz U. DNA-binding studies and antitumor evaluation of novel water soluble organic pip and hpip analogs. Appl Biochem Biotechnol 2013; 172:248-62. [PMID: 24068473 DOI: 10.1007/s12010-013-0513-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 09/15/2013] [Indexed: 10/26/2022]
Abstract
Two new water-soluble pip and hpip analogs, 1 and 2 pip = 2-phenylimidazo[4,5-f][1, 10]phenanthroline; hpip = 2-(2-hydroxyphenyl)imidazo[4,5-f][1, 10]phenanthroline, have been synthesized and fully characterized by CHN analysis, MALDI-TOF MS, (1)H-NMR, IR (ATR), and UV-Vis methods. The DNA-binding behaviors of both compounds have been studied by viscosity measurements, spectroscopic methods, and gel electrophoresis studies, and potential for antitumor activity was evaluated by measuring their ability to inhibit DNA transcription. The results indicate that both compounds show some strong binding to DNA in a mixture of electrostatic and intercalative mode resulting in the intrinsic binding constants Kb of (4.0 ± 0.5) × 10(5) M(-1) and (7.5 ± 0.5) × 10(5) M(-1) for 1 and 2, respectively. These strong binding affinities for DNA are comparable for that seen for many transition metal-based intercalators. Comparatively, observed difference in the DNA-binding affinities of two complexes can be reasonably explained by the presence of an intra-molecular hydrogen-bonding between the ortho-phenolic group and the nitrogen atom of the imidazole ring. The extended co-planarity of 2 due to the intramolecular hydrogen bonding may lead to an enhancement of DNA binding affinity of 2. In addition, 2 can promote cleavage of pBR322 DNA upon irradiation, it inhibits DNA transcription and it is more cytotoxic at lower concentrations in comparison to 1, as revealed by the spectroscopic measurements.
Collapse
Affiliation(s)
- Burak Coban
- Department of Chemistry, Faculty of Arts and Sciences, Bulent Ecevit University, Zonguldak, 67100, Turkey,
| | | |
Collapse
|
19
|
Gamba I, Salvadó I, Rama G, Bertazzon M, Sánchez MI, Sánchez-Pedregal VM, Martínez-Costas J, Brissos RF, Gamez P, Mascareñas JL, Vázquez López M, Vázquez ME. Custom-fit ruthenium(II) metallopeptides: a new twist to DNA binding with coordination compounds. Chemistry 2013; 19:13369-75. [PMID: 23943195 DOI: 10.1002/chem.201301629] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Indexed: 12/20/2022]
Abstract
A new bipyridine building block has been used for the solid-phase synthesis of dinuclear DNA-binding ruthenium(II) metallopeptides. Detailed spectroscopic studies suggest that these compounds bind to the DNA by insertion into the DNA minor groove. Moreover, the potential of the solid-phase peptide synthesis approach is demonstrated by the straightforward synthesis of an octaarginine derivative that shows effective cellular internalization and cytotoxicity linked with strong DNA interaction, as evidenced by steady-state fluorescence spectroscopy and AFM studies.
Collapse
Affiliation(s)
- Ilaria Gamba
- Departamento de Química Inorgánica y Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela (Spain)
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Li B, Liu W, Shao J, Xue CL, Xie CZ, Ouyang Y, Xu JY. Synthesis, structure, spectroscopic, and DNA binding properties of Co(III) and Ni(II) complexes with ((E)-2-(amino((pyridin-2-ylmethylene)amino)methylene)maleonitrile). J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.807341] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Bing Li
- a Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy , Tianjin Medical University , Tianjin , P.R. China
| | - Wei Liu
- b The Second Hospital of Tianjin Medical University , Tianjin , P.R. China
| | - Jia Shao
- a Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy , Tianjin Medical University , Tianjin , P.R. China
| | - Chun-Lan Xue
- a Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy , Tianjin Medical University , Tianjin , P.R. China
| | - Cheng-Zhi Xie
- a Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy , Tianjin Medical University , Tianjin , P.R. China
| | - Yan Ouyang
- a Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy , Tianjin Medical University , Tianjin , P.R. China
| | - Jing-Yuan Xu
- a Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy , Tianjin Medical University , Tianjin , P.R. China
| |
Collapse
|
21
|
Jamil M, Altaf AA, Badshah A, Ahmad I, Zubair M, Kemal S, Ali MI. Naked Eye DNA detection: synthesis, characterization and DNA binding studies of a novel azo-guanidine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 105:165-170. [PMID: 23299023 DOI: 10.1016/j.saa.2012.12.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 11/29/2012] [Accepted: 12/06/2012] [Indexed: 06/01/2023]
Abstract
A novel class of azo-guanidine compounds is introduced in this article. The novel compound 2-(2-hydroxyphenyl)-1-(phenylamino)-3-(phenylimino)guanidine (AG) was synthesized and well characterized by using different analytical instrumental techniques like elemental analysis, FTIR, (1)H and (13)C NMR, UV-Visible spectroscopy and cyclic voltammetry. The new compound was found interacting with DNA and shows clear color change in the solution. The AG-DNA complex was qualitatively and quantitatively characterized with UV-Visible spectroscopy and cyclic voltammetry. Electrostatic mode of interaction, clear color change and moderate binding constant (K(b)=10(4)) indicate its potential use as DNA staining agent.
Collapse
Affiliation(s)
- Muhammad Jamil
- Department of Chemistry, Govt. College University Faisalabad, Pakistan
| | | | | | | | | | | | | |
Collapse
|
22
|
Synthesis, structure, interaction with DNA and cytotoxicity of a luminescent copper(II) complex with a hydrazone ligand. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.01.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
23
|
Wächtler M, Bräutigam M, Popp J, Dietzek B. Mechanism of protonation induced changes in Raman spectra of a trisheteroleptic ruthenium complex revealed by DFT calculations. RSC Adv 2013. [DOI: 10.1039/c3ra00157a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
|
24
|
Zhang Y, Zhang G, Fu P, Ma Y, Zhou J. Study on the interaction of triadimenol with calf thymus DNA by multispectroscopic methods and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:1012-1019. [PMID: 22944149 DOI: 10.1016/j.saa.2012.08.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 08/03/2012] [Accepted: 08/07/2012] [Indexed: 06/01/2023]
Abstract
The binding mechanism of triadimenol (NOL) to calf thymus DNA (ctDNA) in physiological buffer (pH 7.4) was investigated by multispectroscopic methods including UV-vis absorption, fluorescence, circular dichroism (CD), Fourier transform infrared (FT-IR), and nuclear magnetic resonance ((1)H NMR) spectroscopy, coupled with viscosity measurements and atomic force microscopy (AFM) technique. The results suggested that NOL interacted with ctDNA by intercalation mode. CD and AFM assays showed that NOL can damage the base stacking of ctDNA and result in regional cleavage of the two DNA strands. FT-IR and (1)H NMR spectra coupled with molecular docking revealed that a specific binding mainly exists between NOL and G-C base pairs of the ctDNA where two hydrogen bonds form. Moreover, the association constants of NOL with DNA at three different temperatures were determined to be in the 10(3) L mol(-1) range. The calculated thermodynamic parameters suggested that the binding of NOL to ctDNA was driven mainly by hydrogen bond and van der Waals.
Collapse
Affiliation(s)
- Yepeng Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, No. 235 Nanjing East Road, Nanchang 330047, China
| | | | | | | | | |
Collapse
|
25
|
Zhao XL, Ma YZ, Wang KZ. Synthesis, pH-induced “on–off–on” luminescence switching, and partially intercalative DNA-binding and DNA photocleavage properties of an β-d-allopyranoside-grafted ruthenium(II) complex. J Inorg Biochem 2012; 113:66-76. [DOI: 10.1016/j.jinorgbio.2012.03.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2012] [Revised: 03/28/2012] [Accepted: 03/29/2012] [Indexed: 11/15/2022]
|
26
|
Liu XW, Chen YD, Li L. Synthesis, DNA-binding, and photocleavage properties of Ru(II) complexes containing dppz-based ligand. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.710749] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Xue-Wen Liu
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
- b Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education , Xiangtan University , Xiangtan 411105 , P.R. China
| | - Yuan-Dao Chen
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
- b Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education , Xiangtan University , Xiangtan 411105 , P.R. China
| | - Lin Li
- a College of Chemistry and Chemical Engineering, Hunan University of Arts and Science , ChangDe 415000 , P.R. China
| |
Collapse
|
27
|
A pH-controllable electrochemical molecule switch employing a new electrochemical measurement system as switching transducer. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1768-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
28
|
Pathan AH, Bakale RP, Naik GN, Frampton CS, Gudasi KB. Synthesis, crystal structure, redox behavior and comprehensive studies on DNA binding and cleavage properties of transition metal complexes of a fluoro substituted thiosemicarbazone derived from ethyl pyruvate. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.12.033] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
29
|
Boosting the sensitivity of pH responsible luminescent switches of polypyridyl ruthenium(II) complexes by structural design. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2011.11.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
30
|
Liu XW, Chen YD, Li L, Lu JL, Zhang DS. DNA-binding and photocleavage studies of ruthenium(II) complexes containing asymmetric intercalative ligand. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 86:554-561. [PMID: 22137749 DOI: 10.1016/j.saa.2011.11.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 11/01/2011] [Accepted: 11/09/2011] [Indexed: 05/31/2023]
Abstract
A novel asymmetric ligand 2-(pyridine-2-yl)-1-H-imidazo[4,5-i]dibenzo[2,3-a:2',3'-c]phenazine (pidbp) and its ruthenium complexes [Ru(L)(2)(pidbp)](2+) (L=bpy (2, 2'- bipyridine), phen (1, 10 - phenanthroline)), have been synthesized and characterized by elemental analysis, ES-MS, (1)H NMR. Various methods support the conclusion that both Ru(II) complexes can intercalate into DNA base pairs. Complex [Ru(bpy)(2)(pidbp)](2+)4 exhibits its DNA "molecular light switch" properties. Furthermore, the two complexes are efficient DNA-photocleavers under irradiation at 365 nm, and complex 5 exhibits a stronger DNA-photocleavage efficiency than complex 4. The mechanism of DNA cleavage is an oxidative process by generating singlet oxygen.
Collapse
Affiliation(s)
- Xue-Wen Liu
- College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, ChangDe 415000, PR China.
| | | | | | | | | |
Collapse
|
31
|
Cheng F, Chen J, Wang F, Tang N, Chen L. Synthesis, photophysical, and electrochemical properties of a new family of trinuclear Ru(II) polypyridine complexes. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.646998] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Feixiang Cheng
- a College of Chemistry and Chemical Engineering, Qujing Normal University , Qujing 655011 , P.R. China
| | - Jishu Chen
- a College of Chemistry and Chemical Engineering, Qujing Normal University , Qujing 655011 , P.R. China
| | - Fan Wang
- a College of Chemistry and Chemical Engineering, Qujing Normal University , Qujing 655011 , P.R. China
| | - Ning Tang
- b College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000 , P.R. China
| | - Longhai Chen
- b College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000 , P.R. China
| |
Collapse
|
32
|
Colorimetric and luminescent bifunctional Ru(II) complex-modified gold nano probe for sensing of DNA. Biosens Bioelectron 2011; 29:109-14. [DOI: 10.1016/j.bios.2011.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Revised: 07/27/2011] [Accepted: 08/01/2011] [Indexed: 11/22/2022]
|
33
|
McKinley AW, Lincoln P, Tuite EM. Environmental effects on the photophysics of transition metal complexes with dipyrido[2,3-a:3′,2′-c]phenazine (dppz) and related ligands. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2011.06.012] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
34
|
DNA- and RNA-binding and enhanced DNA-photocleavage properties of a ferrocenyl-containing ruthenium(II) complex. J Inorg Biochem 2011; 107:104-10. [PMID: 22178672 DOI: 10.1016/j.jinorgbio.2011.10.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 09/12/2011] [Accepted: 10/17/2011] [Indexed: 11/24/2022]
Abstract
The interaction of [Ru(bpy)(2)(fip)](PF(6))(2) {bpy=2,2'-bipyridine, fip=2-ferrocenyl-1H-imidazo[4,5-f][1,10]-phenanthroline} with calf thymus DNA and yeast tRNA was investigated comparatively by UV-visible absorption and luminescence spectrophotometric titrations, steady-state emission quenching by [Fe(CN)(6)](4-), ethidium bromide competition experiment, DNA thermal denaturation, viscosity measurements and salt effect studies. The results suggest that the complex binds to the DNA more strongly than to the RNA. The density functional theory calculations were also carried out in order to better understand the nucleic acid binding properties. Agarose gel electrophoresis showed that the complex exhibited enhanced DNA-photocleavage capacity on pUC 18 plasmid DNA under irradiation at 360 nm as compared with a ferrocenyl-free analogous complex.
Collapse
|
35
|
Zhang AG, Yang HX, Wang KZ. The Effects of Grafting of 2-Pyridyl to [Ru(bpy)2(Hpip)]2+on Acid-Base and DNA-Binding Properties: Experimental and DFT Studies. J Biomol Struct Dyn 2011; 28:955-68. [DOI: 10.1080/07391102.2011.10508621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
36
|
Synthesis, spectrophotometric pH titrations and DNA binding properties of a cyclometalated iridium(III) complex of tetrapyrido[3,2-a:2′,3′-c:3″,2″-h:2‴,3‴-j]phenazine. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.12.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
37
|
Ju CC, Zhang AG, Yuan CL, Zhao XL, Wang KZ. The interesting DNA-binding properties of three novel dinuclear Ru(II) complexes with varied lengths of flexible bridges. J Inorg Biochem 2011; 105:435-43. [DOI: 10.1016/j.jinorgbio.2010.12.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 12/11/2010] [Accepted: 12/14/2010] [Indexed: 10/18/2022]
|
38
|
Tan LF, Song FC, Zou XQ, Ling XL. Nucleic acid binding behaviors and cytotoxic properties of a Ru(II) complex. DNA Cell Biol 2011; 30:277-85. [PMID: 21323576 DOI: 10.1089/dna.2010.1137] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The interactions of complex [Ru(bpy)(2)(hnip)](2+) (1) {bpy = 2,2'-bipyridine, hnip = 2-(2-hydroxy-1-naphthyl)imidazo[4,5-f][1,10]phenanthroline} with calf thymus DNA and yeast tRNA were investigated by UV-vis spectroscopy, fluorescence spectroscopy, viscosity, equilibrium dialysis, and circular dichroism. In addition, the antitumor activities of complex 1 were evaluated with MTT method. These results indicate that the structures of DNA and RNA have significant effects on the binding behaviors of complex 1. Further, complex 1 demonstrates different antitumor activities against selected cancer cell lines in vitro.
Collapse
Affiliation(s)
- Li-Feng Tan
- Key Laboratory of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, PR China.
| | | | | | | |
Collapse
|
39
|
Luo H, Wang ZP, Zhang AG, Wang KZ. Synthesis, and Acid–Base and DNA-Binding Properties of a Thiophen-Appended Ruthenium Complex. Aust J Chem 2011. [DOI: 10.1071/ch10316] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
2-(5-Phenylthiophen-2-yl)-1H-imidazo[4,5-f][1,10]phenanthroline (Hptip) and its RuII complex [Ru(bpy)2(Hptip)](PF6)2 (where bpy = 2,2′-bipyridine) have been synthesized and characterized by elemental analysis, 1H NMR spectroscopy, and mass spectrometry. The acid–base properties of the complex were studied by UV-visible and luminescence spectrophotometric pH titrations, and ground- and excited-state acidity ionization constants were derived. The DNA-binding properties of [Ru(bpy)2(Hptip)](PF6)2 were also investigated by means of UV-vis and emission spectroscopy, salt effects, steady-state emission quenching by [Fe(CN)6]4–, DNA competitive binding with ethidium bromide, DNA melting experiments, and viscosity measurements. Density functional theoretical calculations were also carried out in order to understand the DNA binding properties.
Collapse
|
40
|
Rajalakshmi S, Weyhermüller T, Freddy AJ, Vasanthi HR, Nair BU. Anomalous behavior of pentacoordinate copper complexes of dimethylphenanthroline and derivatives of terpyridine ligands: Studies on DNA binding, cleavage and apoptotic activity. Eur J Med Chem 2010; 46:608-17. [PMID: 21193251 DOI: 10.1016/j.ejmech.2010.11.041] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 11/24/2010] [Accepted: 11/28/2010] [Indexed: 10/18/2022]
Abstract
Copper(II) complexes with substituted terpyridine ligands, namely [Cu(itpy)(dmp)](NO3)2 (1) and [Cu(ptpy)(dmp)](NO3)2 (2) have been synthesized and characterized. The interaction of the complexes with CT-DNA has been explored using spectroscopic techniques and viscosity. Complexes 1 and 2 bind in the grooves of DNA, interestingly 1 in the minor and 2 in the major groove. Both the complexes have been found to promote DNA cleavage; complex 1 through hydrolytic and 2 oxidative. Complexes 1 and 2 have been found to be cytotoxic and bring about apoptosis of human lung cancer cell line A549.
Collapse
Affiliation(s)
- Subramaniyam Rajalakshmi
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Adyar, Chennai 600 020, India
| | | | | | | | | |
Collapse
|
41
|
Liu XW, Shen YM, Lu JL, Chen YD, Li L, Zhang DS. Synthesis, DNA-binding and photocleavage of "light switch" complexes [Ru(bpy)2(pyip)]2+ and [Ru(phen)2(pyip)]2+. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:522-527. [PMID: 20634127 DOI: 10.1016/j.saa.2010.06.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Revised: 06/04/2010] [Accepted: 06/17/2010] [Indexed: 05/29/2023]
Abstract
Two novel Ru(II) complexes [Ru(bpy)(2)(pyip)](2+)1 and [Ru(phen)(2)(pyip)](2+)2 (bpy=2,2'-bipyridine; phen=1,10-phenanthroline; pyip=2-(pyridine-2-yl)imidazo-[4,5-f][1,10]-phenanthroline), have been synthesized and characterized by elemental analysis, ES-MS, (1)H NMR, UV-Vis. The DNA-binding behaviors of both complexes were studied by spectroscopic methods and viscosity measurements. The results indicate that the two complexes can bind to CT-DNA in an intercalative mode, and also show that these two Ru(II) complexes can promote the photocleavage of pBR322 DNA. In addition, In the presence of Co(2+), the emission of DNA-[Ru(L)(2)pyip](2+) can be quenched, which exhibited the DNA "light switch" properties.
Collapse
Affiliation(s)
- Xue-Wen Liu
- College of Chemistry and Chemical Engineering, Hunan University of Arts and Science, ChangDe 415000, PR China.
| | | | | | | | | | | |
Collapse
|
42
|
Wang P, Leung CH, Ma DL, Yan SC, Che CM. Structure-based design of platinum(II) complexes as c-myc oncogene down-regulators and luminescent probes for G-quadruplex DNA. Chemistry 2010; 16:6900-11. [PMID: 20437426 DOI: 10.1002/chem.201000167] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A series of platinum(II) complexes with tridentate ligands was synthesized and their interactions with G-quadruplex DNA within the c-myc gene promoter were evaluated. Complex 1, which has a flat planar 2,6-bis(benzimidazol-2-yl)pyridine (bzimpy) scaffold, was found to stabilize the c-myc G-quadruplex structure in a cell-free system. An in silico G-quadruplex DNA model has been constructed for structure-based virtual screening to develop new Pt(II)-based complexes with superior inhibitory activities. By using complex 1 as the initial structure for hit-to-lead optimization, bzimpy and related 2,6-bis(pyrazol-3-yl)pyridine (dPzPy) scaffolds containing amine side-chains emerge as the top candidates. Six of the top-scoring complexes were synthesized and their interactions with c-myc G-quadruplex DNA have been investigated. The results revealed that all of the complexes have the ability to stabilize the c-myc G-quadruplex. Complex 3 a ([Pt(II)L2R](+); L2=2,6-bis[1-(3-piperidinepropyl)-1H-enzo[d]imidazol-2-yl]pyridine, R=Cl) displayed the strongest inhibition in a cell-free system (IC(50)=2.2 microM) and was 3.3-fold more potent than that of 1. Complexes 3 a and 4 a ([Pt(II)L3R](+); L3=2,6-bis[1-(3-morpholinopropyl)-1H-pyrazol-3-yl]pyridine, R=Cl) were found to effectively inhibit c-myc gene expression in human hepatocarcinoma cells with IC(50) values of approximately 17 microM, whereas initial hit 1 displayed no significant effect on gene expression at concentrations up to 50 microM. Complexes 3 a and 4 a have a strong preference for G-quadruplex DNA over duplex DNA, as revealed by competition dialysis experiments and absorption titration; 3 a and 4 a bind G-quadruplex DNA with binding constants (K) of approximately 10(6)-10(7) dm(3) mol(-1), which are at least an order of magnitude higher than the K values for duplex DNA. NMR spectroscopic titration experiments and molecular modeling showed that 4 a binds c-myc G-quadruplex DNA through an external end-stacking mode at the 3'-terminal face of the G-quadruplex. Intriguingly, binding of c-myc G-quadruplex DNA by 3 b is accompanied by an increase of up to 38-fold in photoluminescence intensity at lambda(max)=622 nm.
Collapse
Affiliation(s)
- Ping Wang
- Department of Chemistry and Open Laboratory of Chemical Biology of the Institute of Molecular Technology for Drug Discovery and Synthesis, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | | | | | | | | |
Collapse
|
43
|
|