151
|
Jin L, Zhao C, Liu C, Min S, Zhang T, Wang Z, Wang W, Zhang Q. The multi-channel reaction of the OH radical with 5-hydroxymethylcytosine: a computational study. RSC Adv 2016. [DOI: 10.1039/c5ra24293b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The hydroxyl radical may attack the new cytosine derivative 5-hydroxymethylcytosine (5-hmCyt), causing DNA oxidative damage. Two distinct mechanisms have been explored and our results provide some evidence between 5-hmCyt and tumor development.
Collapse
Affiliation(s)
- Lingxia Jin
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- Shaanxi Key Laboratory for Resource Biology
- Vitamin D Research Institute
- School of Chemical & Environment Science
- Shaanxi University of Technology
| | - Caibin Zhao
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- Shaanxi Key Laboratory for Resource Biology
- Vitamin D Research Institute
- School of Chemical & Environment Science
- Shaanxi University of Technology
| | - Cunfang Liu
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- Shaanxi Key Laboratory for Resource Biology
- Vitamin D Research Institute
- School of Chemical & Environment Science
- Shaanxi University of Technology
| | - Suotian Min
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- Shaanxi Key Laboratory for Resource Biology
- Vitamin D Research Institute
- School of Chemical & Environment Science
- Shaanxi University of Technology
| | - Tianlei Zhang
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- Shaanxi Key Laboratory for Resource Biology
- Vitamin D Research Institute
- School of Chemical & Environment Science
- Shaanxi University of Technology
| | - Zhiyin Wang
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- Shaanxi Key Laboratory for Resource Biology
- Vitamin D Research Institute
- School of Chemical & Environment Science
- Shaanxi University of Technology
| | - Wenliang Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
- China
| | - Qiang Zhang
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- Shaanxi Key Laboratory for Resource Biology
- Vitamin D Research Institute
- School of Chemical & Environment Science
- Shaanxi University of Technology
| |
Collapse
|
152
|
Wang MQ, Dong J, Zhang H, Tang Z. Characterization of deoxyribozymes with site-specific oxidative cleavage activity against DNA obtained by in vitro selection. Org Biomol Chem 2016; 14:2347-51. [DOI: 10.1039/c6ob00148c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have generated a new class of deoxyribozymes that required Mn2+ and Cu2+ to catalyze a site-specific oxidative cleavage of DNA.
Collapse
Affiliation(s)
- Ming-Qi Wang
- School of Pharmacy
- Jiangsu University
- Zhenjiang 212013
- P. R. China
| | - Juan Dong
- Natural Products Research Center
- Chengdu Institution of Biology
- Chinese Academy of Science
- Chengdu 610041
- P. R. China
| | - Huafan Zhang
- Natural Products Research Center
- Chengdu Institution of Biology
- Chinese Academy of Science
- Chengdu 610041
- P. R. China
| | - Zhuo Tang
- Natural Products Research Center
- Chengdu Institution of Biology
- Chinese Academy of Science
- Chengdu 610041
- P. R. China
| |
Collapse
|
153
|
Li Z, Grant KB. DNA photo-cleaving agents in the far-red to near-infrared range – a review. RSC Adv 2016. [DOI: 10.1039/c5ra28102d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Ideal photonucleases for clinical applications cleave DNA upon activation with deeply penetrating far-red to near-infrared light.
Collapse
Affiliation(s)
- Ziyi Li
- Department of Chemistry
- Georgia State University
- Atlanta
- USA
| | | |
Collapse
|
154
|
Ross MJ, Bradford SS, Cowan JA. Catalytic metallodrugs based on the LaR2C peptide target HCV SLIV IRES RNA. Dalton Trans 2015; 44:20972-82. [PMID: 26583601 PMCID: PMC4691540 DOI: 10.1039/c5dt02837j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Prior work has demonstrated the potential effectiveness of a new class of metallopeptides as catalytic metallodrugs that target HCV IRES SLIIb RNA (Cu-GGHYrFK, 1). Herein new catalytic metallodrugs (GGHKYKETDLLILFKDDYFAKKNEERK, 2; and GGHKYKETDL, 3) are described based on the LaR2C peptide that has been shown to bind to the SLIV HCV IRES domain. In vitro fluorescence assays yielded KD values ∼10 μM for both peptides and reaction of the copper derivatives with SLIV RNA demonstrated initial rates comparable across different assays as well as displaying pseudo-Michaelis-Menten behavior. The sites of reaction and cleavage mechanisms were determined by MALDI-TOF mass spectrometry. The primary site of copper-promoted SLIV cleavage is shown to occur in the vicinity of the 5'-G17C18A19C20-3' sequence that corresponds to a known binding site of the RM2 motif of the human La protein and has previously been reported to be important for viral translation. This domain also flanks the internal start codon (AUG). Both copper complexes also showed efficacy in an HCV replicon assay (IC50 = 0.75 μM for 2-Cu, and 2.17 μM for 3-Cu) and show potential for treatment of hepatitis C, complementing other marketed drugs by acting on a distinct therapeutic target by a novel mechanism of action.
Collapse
Affiliation(s)
- Martin James Ross
- Evans Laboratory of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - Seth S. Bradford
- Evans Laboratory of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
| | - J. A. Cowan
- Evans Laboratory of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210
- MetalloPharm, 1790 Riverstone Dr., Delaware, OH 43015
| |
Collapse
|
155
|
Liu C, Zhu Y, Tang M. Theoretical studies on binding modes of copper-based nucleases with DNA. J Mol Graph Model 2015; 64:11-29. [PMID: 26766349 DOI: 10.1016/j.jmgm.2015.12.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 01/06/2023]
Abstract
In the present work, molecular simulations were performed for the purpose of predicting the binding modes of four types of copper nucleases (a total 33 compounds) with DNA. Our docking results accurately predicted the groove binding and electrostatic interaction for some copper nucleases with B-DNA. The intercalation modes were also reproduced by "gap DNA". The obtained results demonstrated that the ligand size, length, functional groups and chelate ring size bound to the copper center could influence the binding affinities of copper nucleases. The binding affinities obtained from the docking calculations herein also replicated results found using MM-PBSA approach. The predicted DNA binding modes of copper nucleases with DNA will ultimately help us to better understand the interaction of copper compounds with DNA.
Collapse
Affiliation(s)
- Chunmei Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, PR China
| | - Yanyan Zhu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, PR China.
| | - Mingsheng Tang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan Province 450001, PR China.
| |
Collapse
|
156
|
Adam R, Bilbao-Ramos P, Abarca B, Ballesteros R, González-Rosende ME, Dea-Ayuela MA, Estevan F, Alzuet-Piña G. Triazolopyridopyrimidines: an emerging family of effective DNA photocleavers. DNA binding. Antileishmanial activity. Org Biomol Chem 2015; 13:4903-17. [PMID: 25812028 DOI: 10.1039/c5ob00280j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Triazolopyridopyrimidines 3-phenyl-6,8-di(2-pyridyl)-[1,2,3]triazolo[5',1':6,1]pyrido[2,3-d]pyrimidine (1a), 6,8-di(pyridin-2-yl)-[1,2,3]triazolo[1',5':1,6]pyrido[2,3-d]pyrimidine (1b) and 3-methyl-6,8-di(2-pyridyl)-[1,2,3]triazolo[5',1':6,1]pyrido[2,3-d]pyrimidine (1c) were prepared and their electrochemical and luminescence properties were studied in depth. The DNA binding ability of this series of compounds has been investigated by means of UV-vis absorption and fluorescence titrations, steady-state emission quenching with ferrocyanide as well as viscosity measurements. Results have shown that triazolopyridopyrimidine 1a interacts strongly at DNA grooves. This compound also displays preferential binding to GC-rich sequences and the ability to photooxidize guanine. Moreover, these studies have revealed the key role of the phenyl substituent at the triazole ring in the binding affinity of 1a-c. Compounds 1b and 1c did not show appreciable propensity for DNA binding, however these triazolopyridopyrimidines demonstrated to present photoinduced DNA cleavage activity, 1b being more active than 1c. DNA photocleavage mediated by these compounds takes place mainly through single strand scission events and, in a minor extent, through double strand cuts. Mechanistic investigations using radical scavengers showed that both 1b and 1c generate reactive oxygen species (singlet oxygen, superoxide and hydroxyl radicals) upon irradiation. Both type I and type II mechanisms are involved in the photocleavage process. Furthermore, compounds 1a-c were tested for their antiprotozoal activity against four different Leishmania spp. (L. infantum, L. braziliensis, L. guyanensis and L. amazonensis). Triazolopyridopyrimidines 1a and 1c resulted to be more active and selective than the reference drug (miltefosine) in vitro against L. infantum amastigotes. Compound 1a exhibited high leishmanicidal activity against L. infantum spleen forms in the in vivo test.
Collapse
Affiliation(s)
- Rosa Adam
- Departament de Química Orgànica, Facultat de Farmàcia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100 Burjassot, Valencia, Spain.
| | | | | | | | | | | | | | | |
Collapse
|
157
|
Diverse effects of naturally occurring base lesions on the structure and stability of the human telomere DNA quadruplex. Biochimie 2015; 118:15-25. [DOI: 10.1016/j.biochi.2015.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 07/13/2015] [Indexed: 12/28/2022]
|
158
|
Altürk S, Tamer Ö, Avcı D, Atalay Y. Synthesis, spectroscopic characterization, second and third-order nonlinear optical properties, and DFT calculations of a novel Mn(II) complex. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.08.014] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
159
|
Yu L, Li FZ, Xie JQ, Cai S. DNA Cleavage Activity: Comparison of two Lanthanum Complexes Based on Aza-Crown Ethers with Different Numbers of Nitrogen Atoms. PROGRESS IN REACTION KINETICS AND MECHANISM 2015. [DOI: 10.3184/146867815x14420468512656] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Based on the unique characteristics of lanthanum ion and aza-crown ethers, the lanthanum complexes of two aza-crown ether (L1: 1,10-Dioxa-4,7,13,16-tetraazacyclo-octadecane and L2: 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane) were designed and synthesised. The interaction between these two complexes and DNA was measured by UV-Vis spectroscopy and gel electrophoresis. Moreover, a series of experiments of cleavage of pUC19 DNA were conducted to illustrate the acidity, time and concentration effects. The results indicated that the two metal complexes can accelerate the breakage of DNA from its supercoiled form (form I) to the nicked form (form II) at near-physiological conditions, and the optimum acidity of DNA catalytic cleavage is pH=6.5 and pH=7.0 for LaL1 and LaL2, respectively. Furthermore, the LaL1 exhibited better cleavage activity than LaL2 under the same conditions, thus supercoiled DNA was thoroughly cleaved to the nicked form under the appropriate conditions. The hydrolytic mechanism was verified by applying several oxygen-scavengers to the DNA catalytic cleavage.
Collapse
Affiliation(s)
- Lan Yu
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P.R. China
| | - Fang-zhen Li
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P.R. China
| | - Jia-qing Xie
- College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P.R. China
| | - Shulan Cai
- College of Chemistry & Pharmaceutical Engineering, Sichuan University of Science & Engineering, Zigong, Sichuan, P.R. China, 643000
| |
Collapse
|
160
|
Li Z, Qiao J, Jia Z, Meng S. Synthesis of the Pyridine Hydrazones as Metal-free Artificial Nucleases. CHEM LETT 2015. [DOI: 10.1246/cl.150428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Zhifen Li
- School of Chemical and Environmental Engineering, Datong University
| | - Jun Qiao
- School of Chemical and Environmental Engineering, Datong University
| | - Zhifang Jia
- School of Chemical and Environmental Engineering, Datong University
| | - Shuangming Meng
- School of Chemical and Environmental Engineering, Datong University
| |
Collapse
|
161
|
Ravi M, Chennam KP, Ushaiah B, Eslavath RK, Perugu S, Ajumeera R, Devi CS. A Study on Spectro-Analytical Aspects, DNA - Interaction, Photo-Cleavage, Radical Scavenging, Cytotoxic Activities, Antibacterial and Docking Properties of 3 - (1 - (6 - methoxybenzo [d] thiazol - 2 - ylimino) ethyl) - 6 - methyl - 3H - pyran - 2, 4 - dione and its Metal Complexes. J Fluoresc 2015; 25:1279-96. [PMID: 26315729 DOI: 10.1007/s10895-015-1616-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 07/05/2015] [Indexed: 12/21/2022]
Abstract
The focus of the present work is on the design, synthesis, characterization, DNA-interaction, photo-cleavage, radical scavenging, in-vitro cytotoxicity, antimicrobial, docking and kinetic studies of Cu (II), Cd (II), Ce (IV) and Zr (IV) metal complexes of an imine derivative, 3 - (1 - (6 - methoxybenzo [d] thiazol - 2 - ylimino) ethyl) - 6 - methyl - 3H - pyran - 2, 4 - dione. The investigation of metal ligand interactions for the determination of composition of metal complexes, corresponding kinetic studies and antioxidant activity in solution was carried out by spectrophotometric methods. The synthesized metal complexes were characterized by EDX analysis, Mass, IR, (1)H-NMR, (13)C-NMR and UV-Visible spectra. DNA binding studies of metal complexes with Calf thymus (CT) DNA were carried out at room temperature by employing UV-Vis electron absorption, fluorescence emission and viscosity measurement techniques. The results revealed that these complexes interact with DNA through intercalation. The results of in vitro antibacterial studies showed the enhanced activity of chelating agent in metal chelated form and thus inferring scope for further development of new therapeutic drugs. Cell viability experiments indicated that all complexes showed significant dose dependent cytotoxicity in selected cell lines. The molecular modeling and docking studies were carried out with energy minimized structures of metal complexes to identify the receptor to metal interactions.
Collapse
Affiliation(s)
- Mudavath Ravi
- Department of Chemistry, Osmania University, Hyderabad, 500 007, Telangana, India
| | | | - B Ushaiah
- Department of Chemistry, Osmania University, Hyderabad, 500 007, Telangana, India
| | - Ravi Kumar Eslavath
- Department of Bio-Chemistry, Osmania University, Hyderabad, 500 007, Telangana, India
| | - Shyam Perugu
- Department of Bio-Chemistry, Osmania University, Hyderabad, 500 007, Telangana, India
| | - Rajanna Ajumeera
- National Institute of Nutrition, Hyderabad, 500 007, Telangana, India
| | - Ch Sarala Devi
- Department of Chemistry, Osmania University, Hyderabad, 500 007, Telangana, India.
| |
Collapse
|
162
|
Wang C, Sun A, Qiao Y, Zhang P, Ma L, Su M. Cationic surface modification of gold nanoparticles for enhanced cellular uptake and X-ray radiation therapy. J Mater Chem B 2015; 3:7372-7376. [PMID: 26512323 DOI: 10.1039/c5tb00766f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A challenge of X-ray radiation therapy is that high dose X-ray can damage normal cells and cause side effects. This paper describes a new nanoparticle-based method to reduce X-ray dose in radiation therapy by internalization of gold nanoparticles that are modified with cationic molecules into cancer cells. A cationic thiol molecule is synthesized and used to modify gold nanoparticles in a one-step reaction. The modified nanoparticles can penetrate cell membranes at high yield. By bring radio-sensitizing gold nanoparticles closer to nuclei where DNA is stored, the total X-ray dose needed to kill cancer cells has been reduced. The simulation of X-ray-gold nanoparticle interaction also indicates that Auger electrons contribute more than photoelectrons.
Collapse
Affiliation(s)
- Chaoming Wang
- Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China 610030 ; Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA 01609 ; NanoScience Technology Center, Biomolecular Technology Center, University of Central Florida, Orlando, FL, USA 32826
| | - An Sun
- NanoScience Technology Center, Biomolecular Technology Center, University of Central Florida, Orlando, FL, USA 32826
| | - Yong Qiao
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA 01609 ; NanoScience Technology Center, Biomolecular Technology Center, University of Central Florida, Orlando, FL, USA 32826
| | - Peipei Zhang
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA 01609
| | - Liyuan Ma
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA 02115 ; Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA 01609 ; NanoScience Technology Center, Biomolecular Technology Center, University of Central Florida, Orlando, FL, USA 32826
| | - Ming Su
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA 02115 ; Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA 01609 ; NanoScience Technology Center, Biomolecular Technology Center, University of Central Florida, Orlando, FL, USA 32826
| |
Collapse
|
163
|
Lartia R, Constant JF. Synthetic access to the chemical diversity of DNA and RNA 5′-aldehyde lesions. J Org Chem 2015; 80:705-10. [PMID: 25372153 DOI: 10.1021/jo502170e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrogen atom abstraction from the C5′-position of nucleotides in DNA results in direct strand scission by generating alkali-labile fragments from the oxidized nucleotide. The major damage consists in a terminus containing a 5′-aldehyde as part of an otherwise undamaged nucleotide. Moreover it is considered as a polymorphic DNA strand break lesion since it can be borne by any of the four nucleosides encountered in DNA. Here we propose an expeditious synthesis of oligonucleotides (ON) ending with this 5′-aldehyde group (5′-AODN). This straightforward and cheap strategy relies on Pfitzner–Moffatt oxidation performed on solid support followed by a transient protection of the resulting aldehyde function. This method is irrespective of the 5′-terminal nucleobase and most interestingly can be directly extended to RNA to produce the corresponding 5′-AORN. We also report preliminary results on recognition of 5′-AODN by base excision repair (BER) enzymes.
Collapse
|
164
|
Chung WH. Mechanisms of a novel anticancer therapeutic strategy involving atmospheric pressure plasma-mediated apoptosis and DNA strand break formation. Arch Pharm Res 2015; 39:1-9. [DOI: 10.1007/s12272-015-0644-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 07/29/2015] [Indexed: 12/12/2022]
|
165
|
Bordbar M, Tabatabaee M, Yeganeh Faal A, Mehri Lighvan Z, Fazaeli R. DNA Binding Properties of Water-Soluble Mixed Ligand Nickel(II) Complex with Calf-thymus DNA Using Different Instrumental Methods. ACTA ACUST UNITED AC 2015. [DOI: 10.1080/15533174.2014.900627] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Maryam Bordbar
- Department of Chemistry, Faculty of Science, University of Qom, Qom, I. R. Iran
| | - Masoumeh Tabatabaee
- Department of Chemistry, Islamic Azad University, Yazd-Branch, Yazd, I. R. Iran
| | | | | | - Razieh Fazaeli
- Department of Chemistry, Islamic Azad University, Shahreza-Branch, Shahreza, I. R. Iran
| |
Collapse
|
166
|
Zhang X, Tang M, Li F, Zhu Y, Liu C, Zhang W, Wei D. Theoretical study on binding models of copper nucleases containing pyridyl groups to DNA. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1700-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
167
|
Amato NJ, Zhai Q, Navarro DC, Niedernhofer LJ, Wang Y. In vivo detection and replication studies of α-anomeric lesions of 2'-deoxyribonucleosides. Nucleic Acids Res 2015. [PMID: 26202973 PMCID: PMC4787794 DOI: 10.1093/nar/gkv725] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
DNA damage, arising from endogenous metabolism or exposure to environmental agents, may perturb the transmission of genetic information by blocking DNA replication and/or inducing mutations, which contribute to the development of cancer and likely other human diseases. Hydroxyl radical attack on the C1′, C3′ and C4′ of 2-deoxyribose can give rise to epimeric 2-deoxyribose lesions, for which the in vivo occurrence and biological consequences remain largely unexplored. Through independent chemical syntheses of all three epimeric lesions of 2′-deoxyguanosine (dG) and liquid chromatography-tandem mass spectrometry analysis, we demonstrated unambiguously the presence of substantial levels of the α-anomer of dG (α-dG) in calf thymus DNA and in DNA isolated from mouse pancreatic tissues. We further assessed quantitatively the impact of all four α-dN lesions on DNA replication in Escherichia coli by employing a shuttle-vector method. We found that, without SOS induction, all α-dN lesions except α-dA strongly blocked DNA replication and, while replication across α-dA was error-free, replicative bypass of α-dC and α-dG yielded mainly C→A and G→A mutations. In addition, SOS induction could lead to markedly elevated bypass efficiencies for the four α-dN lesions, abolished the G→A mutation for α-dG, pronouncedly reduced the C→A mutation for α-dC and triggered T→A mutation for α-dT. The preferential misincorporation of dTMP opposite the α-dNs could be attributed to the unique base-pairing properties of the nucleobases elicited by the inversion of the configuration of the N-glycosidic linkage. Our results also revealed that Pol V played a major role in bypassing α-dC, α-dG and α-dT in vivo. The abundance of α-dG in mammalian tissue and the impact of the α-dNs on DNA replication demonstrate for the first time the biological significance of this family of DNA lesions.
Collapse
Affiliation(s)
- Nicholas J Amato
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Qianqian Zhai
- Department of Chemistry, University of California, Riverside, CA 92521, USA Department of Chemistry, College of Science, Huazhong Agricultural University, Wuhan, 430070, China
| | - Diana C Navarro
- Department of Metabolism and Aging, The Scripps Research Institute Florida, FL 33458, USA
| | - Laura J Niedernhofer
- Department of Metabolism and Aging, The Scripps Research Institute Florida, FL 33458, USA
| | - Yinsheng Wang
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| |
Collapse
|
168
|
Alshykhly OR, Fleming A, Burrows CJ. 5-Carboxamido-5-formamido-2-iminohydantoin, in Addition to 8-oxo-7,8-Dihydroguanine, Is the Major Product of the Iron-Fenton or X-ray Radiation-Induced Oxidation of Guanine under Aerobic Reducing Conditions in Nucleoside and DNA Contexts. J Org Chem 2015; 80:6996-7007. [PMID: 26092110 PMCID: PMC4509422 DOI: 10.1021/acs.joc.5b00689] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Indexed: 11/29/2022]
Abstract
Exogenously and endogenously produced reactive oxygen species attack the base and sugar moieties of DNA showing a preference for reaction at 2'-deoxyguanosine (dG) sites. In the present work, dG was oxidized by HO(•) via the Fe(II)-Fenton reaction or by X-ray radiolysis of water. The oxidized lesions observed include the 2'-deoxynucleosides of 8-oxo-7,8-dihydroguanine (dOG), spiroiminodihydantoin (dSp), 5-guanidinohydantoin (dGh), oxazolone (dZ), 5-carboxamido-5-formamido-2-iminohydantoin (d2Ih), 5',8-cyclo-2'-deoxyguanosine (cyclo-dG), and the free base guanine (Gua). Reactions conducted with ascorbate or N-acetylcysteine as a reductant under aerobic conditions identified d2Ih as the major lesion formed. Studies were conducted to identify the role of O2 and the reductant in product formation. From these studies, mechanisms are proposed to support d2Ih as a major oxidation product detected under aerobic conditions in the presence of the reductant. These nucleoside observations were then validated in oxidations of oligodeoxynucleotide and λ-DNA contexts that demonstrated high yields of d2Ih in tandem with dOG, dSp, and dGh. These results identify dG oxidation to d2Ih to occur in high yields leading to a hypothesis that d2Ih could be found from in cells stressed with HO(•). Further, the distorted ring structure of d2Ih likely causes this lesion to be highly mutagenic.
Collapse
Affiliation(s)
- Omar R. Alshykhly
- Department of Chemistry, University of
Utah, 315 S 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Aaron
M. Fleming
- Department of Chemistry, University of
Utah, 315 S 1400 East, Salt Lake City, Utah 84112-0850, United States
| | - Cynthia J. Burrows
- Department of Chemistry, University of
Utah, 315 S 1400 East, Salt Lake City, Utah 84112-0850, United States
| |
Collapse
|
169
|
Dumont E, Monari A. Understanding DNA under oxidative stress and sensitization: the role of molecular modeling. Front Chem 2015; 3:43. [PMID: 26236706 PMCID: PMC4500984 DOI: 10.3389/fchem.2015.00043] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 06/29/2015] [Indexed: 12/12/2022] Open
Abstract
DNA is constantly exposed to damaging threats coming from oxidative stress, i.e., from the presence of free radicals and reactive oxygen species. Sensitization from exogenous and endogenous compounds that strongly enhance the frequency of light-induced lesions also plays an important role. The experimental determination of DNA lesions, though a difficult subject, is somehow well established and allows to elucidate even extremely rare DNA lesions. In parallel, molecular modeling has become fundamental to clearly understand the fine mechanisms related to DNA defects induction. Indeed, it offers an unprecedented possibility to get access to an atomistic or even electronic resolution. Ab initio molecular dynamics may also describe the time-evolution of the molecular system and its reactivity. Yet the modeling of DNA (photo-)reactions does necessitate elaborate multi-scale methodologies to tackle a damage induction reactivity that takes place in a complex environment. The double-stranded DNA environment is first characterized by a very high flexibility, but also a strongly inhomogeneous electrostatic embedding. Additionally, one aims at capturing more subtle effects, such as the sequence selectivity which is of critical important for DNA damage. The structure and dynamics of the DNA/sensitizers complexes, as well as the photo-induced electron- and energy-transfer phenomena taking place upon sensitization, should be carefully modeled. Finally the factors inducing different repair ratios for different lesions should also be rationalized. In this review we will critically analyze the different computational strategies used to model DNA lesions. A clear picture of the complex interplay between reactivity and structural factors will be sketched. The use of proper multi-scale modeling leads to the in-depth comprehension of DNA lesions mechanisms and also to the rational design of new chemo-therapeutic agents.
Collapse
Affiliation(s)
- Elise Dumont
- Laboratoire de Chimie, UMR 5182 Centre National de la Recherche Scientifique, École Normale Supérieure de Lyon Lyon, France
| | - Antonio Monari
- Université de Lorraine - Nancy, Theory-Modeling-Simulation, Structure et Réactivité des Systèmes Moléculaires Complexes (SRSMC) Vandoeuvre-les-Nancy, France ; Centre National de la Recherche Scientifique, Theory-Modeling-Simulation, Structure et Réactivité des Systèmes Moléculaires Complexes (SRSMC) Vandoeuvre-les-Nancy, France
| |
Collapse
|
170
|
Micheel M, Torres Ziegenbein C, Gilch P, Ryseck G. Pyrimidinone: versatile Trojan horse in DNA photodamage? Photochem Photobiol Sci 2015; 14:1598-606. [PMID: 26153457 DOI: 10.1039/c5pp00114e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(6-4) Photolesions between adjacent pyrimidine DNA bases are prone to secondary photochemistry. It has been shown that singlet excited (6-4) moieties form Dewar valence isomers as well as triplet excitations. We here report on the triplet state of a minimal model for the (6-4) photolesion, 1-methyl-2(1H)-pyrimidinone. Emphasis is laid on its ability to abstract hydrogen atoms from alcohols and carbohydrates. Steady-state and time-resolved experiments consistently yield bimolecular rate constants of ∼10(4) M(-1) s(-1) for the hydrogen abstraction. The process also occurs intramolecularly as experiments on zebularine (1-(β-d-ribofuranosyl)-2(1H)-pyrimidinone) show.
Collapse
Affiliation(s)
- Mathias Micheel
- Institut für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätstr. 1, D-40225 Düsseldorf, Germany.
| | | | | | | |
Collapse
|
171
|
Wickramasinghe LA, Sharp PR. Hydroxyl Radical Control through Hydrogen Bonding: Photolysis of Platinum(IV)hydroxido Complexes with Intramolecular H-Bonding. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00292] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Paul R. Sharp
- 125 Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| |
Collapse
|
172
|
Pestov NA, Gerasimova NS, Kulaeva OI, Studitsky VM. Structure of transcribed chromatin is a sensor of DNA damage. SCIENCE ADVANCES 2015; 1:e1500021. [PMID: 26601207 PMCID: PMC4646769 DOI: 10.1126/sciadv.1500021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 05/03/2015] [Indexed: 06/05/2023]
Abstract
Early detection and repair of damaged DNA is essential for cell functioning and survival. Although multiple cellular systems are involved in the repair of single-strand DNA breaks (SSBs), it remains unknown how SSBs present in the nontemplate strand (NT-SSBs) of DNA organized in chromatin are detected. The effect of NT-SSBs on transcription through chromatin by RNA polymerase II was studied. NT-SSBs localized in the promoter-proximal region of nucleosomal DNA and hidden in the nucleosome structure can induce a nearly quantitative arrest of RNA polymerase downstream of the break, whereas more promoter-distal SSBs moderately facilitate transcription. The location of the arrest sites on nucleosomal DNA suggests that formation of small intranucleosomal DNA loops causes the arrest. This mechanism likely involves relief of unconstrained DNA supercoiling accumulated during transcription through chromatin by NT-SSBs. These data suggest the existence of a novel chromatin-specific mechanism that allows the detection of NT-SSBs by the transcribing enzyme.
Collapse
Affiliation(s)
- Nikolay A. Pestov
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA
| | | | - Olga I. Kulaeva
- Biology Faculty, Lomonosov Moscow State University, Moscow, Russia
- Fox Chase Cancer Center, Philadelphia, PA 19111, USA
| | - Vasily M. Studitsky
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA
- Biology Faculty, Lomonosov Moscow State University, Moscow, Russia
- Fox Chase Cancer Center, Philadelphia, PA 19111, USA
| |
Collapse
|
173
|
Neustetter M, Aysina J, da Silva FF, Denifl S. The Effect of Solvation on Electron Attachment to Pure and Hydrated Pyrimidine Clusters. Angew Chem Int Ed Engl 2015; 54:9124-6. [PMID: 26110285 PMCID: PMC4832840 DOI: 10.1002/anie.201503733] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Indexed: 11/09/2022]
Abstract
The interaction of low‐energy electrons with biomolecules plays an important role in the radiation‐induced alteration of biological tissue at the molecular level. At electron energies below 15 eV, dissociative electron attachment is one of the most important processes in terms of the chemical transformation of molecules. So far, a common approach to study processes at the molecular level has been to carry out investigations with single biomolecular building blocks like pyrimidine as model molecules. Electron attachment to single pyrimidine, as well as to pure clusters and hydrated clusters, was investigated in this study. In striking contrast to the situation with isolated molecules and hydrated clusters, where no anionic monomer is detectable, we were able to observe the molecular anion for the pure clusters. Furthermore, there is evidence that solvation effectively prevents the ring fragmentation of pyrimidine after electron capture.
Collapse
Affiliation(s)
- Michael Neustetter
- Institut für Ionenphysik und Angewandte Physik and Center for Molecular Biosciences, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck (Austria)
| | - Julia Aysina
- Institut für Ionenphysik und Angewandte Physik and Center for Molecular Biosciences, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck (Austria)
| | - Filipe Ferreira da Silva
- Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica (Portugal).
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik and Center for Molecular Biosciences, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck (Austria).
| |
Collapse
|
174
|
Neustetter M, Aysina J, da Silva FF, Denifl S. Einfluss der Solvatisierung auf die Elektronenanlagerung an Pyrimidin. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503733] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
175
|
Cheng CY, Chou FC, Kladwang W, Tian S, Cordero P, Das R. Consistent global structures of complex RNA states through multidimensional chemical mapping. eLife 2015; 4:e07600. [PMID: 26035425 PMCID: PMC4495719 DOI: 10.7554/elife.07600] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 06/02/2015] [Indexed: 11/13/2022] Open
Abstract
Accelerating discoveries of non-coding RNA (ncRNA) in myriad biological processes pose major challenges to structural and functional analysis. Despite progress in secondary structure modeling, high-throughput methods have generally failed to determine ncRNA tertiary structures, even at the 1-nm resolution that enables visualization of how helices and functional motifs are positioned in three dimensions. We report that integrating a new method called MOHCA-seq (Multiplexed •OHCleavage Analysis with paired-end sequencing) with mutate-and-map secondary structure inference guides Rosetta 3D modeling to consistent 1-nm accuracy for intricately folded ncRNAs with lengths up to 188 nucleotides, including a blind RNA-puzzle challenge, the lariat-capping ribozyme. This multidimensional chemical mapping (MCM) pipeline resolves unexpected tertiary proximities for cyclic-di-GMP, glycine, and adenosylcobalamin riboswitch aptamers without their ligands and a loose structure for the recently discovered human HoxA9D internal ribosome entry site regulon. MCM offers a sequencing-based route to uncovering ncRNA 3D structure, applicable to functionally important but potentially heterogeneous states. DOI:http://dx.doi.org/10.7554/eLife.07600.001 Our genetic material, in the form of molecules of DNA, provides instructions for many different processes in our cells. To issue these instructions, particular sections of DNA are copied to make a type of molecule called ribonucleic acid (RNA). Some of these RNA molecules contain instructions to make proteins, but others—known as non-coding RNAs—regulate the activity of genes in cells. The genetic information within RNA is encoded by the sequence of four different chemical parts called ‘nucleotides’. RNA can exist as a single strand of nucleotides, but the nucleotides can also pair up in specific combinations to form sections of double-stranded RNA. Therefore, a single strand of non-coding RNA can fold into a complex three-dimensional shape that contains loops, twists, and bulges. The three-dimensional structures of non-coding RNAs are crucial for their roles in cells, but the variety and complexity of shapes that they can form makes it technically difficult to study them. In 2008, researchers developed a new method called MOHCA that can map the positions of nucleotides that are close together in the three-dimensional structure. Highly reactive chemicals are attached to the nucleotides and these can react with, and damage, other nearby nucleotides. By detecting which nucleotides have been damaged, it is possible to map the positions of these nucleotides and decipher the structure of the RNA molecule using computer algorithms. MOHCA is a promising approach, but the initial methods to find the damaged nucleotides were tedious and required specialized equipment. Now, Cheng, Das et al.—including some of the researchers involved in the 2008 work—have developed an improved version of MOHCA that uses readily available RNA sequencing techniques to find the damaged nucleotides. The RNA sequencing data are then analyzed by a new algorithm in the Rosetta computer modeling software. Cheng, Das et al. used this newly developed ‘MOHCA-seq’ and Rosetta to reveal the structures of a human non-coding RNA and several other non-coding RNA molecules to a much higher level of detail than before. Together, MOHCA-seq and Rosetta provide a rapid method for researchers to decipher the three-dimensional structure of non-coding RNAs. This method is likely to speed up the analysis of the complex structures of non-coding RNAs. It will be useful in future efforts to work out what roles these RNAs play in cells, including their activity in cancer, neurodegeneration, and other diseases. DOI:http://dx.doi.org/10.7554/eLife.07600.002
Collapse
Affiliation(s)
- Clarence Yu Cheng
- Department of Biochemistry, Stanford University, Stanford, United States
| | - Fang-Chieh Chou
- Department of Biochemistry, Stanford University, Stanford, United States
| | - Wipapat Kladwang
- Department of Biochemistry, Stanford University, Stanford, United States
| | - Siqi Tian
- Department of Biochemistry, Stanford University, Stanford, United States
| | - Pablo Cordero
- Biomedical Informatics Program, Stanford University, Stanford, United States
| | - Rhiju Das
- Department of Biochemistry, Stanford University, Stanford, United States
| |
Collapse
|
176
|
Nikitaki Z, Hellweg CE, Georgakilas AG, Ravanat JL. Stress-induced DNA damage biomarkers: applications and limitations. Front Chem 2015; 3:35. [PMID: 26082923 PMCID: PMC4451417 DOI: 10.3389/fchem.2015.00035] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 05/07/2015] [Indexed: 11/13/2022] Open
Abstract
A variety of environmental stresses like chemicals, UV and ionizing radiation and organism's endogenous processes such as replication stress and metabolism can lead to the generation of reactive oxygen and nitrogen species (ROS/RNS) that can attack cellular vital components like DNA, proteins and lipid membranes. Among them, much attention has been focused on DNA since DNA damage plays a role in several biological disorders and aging processes. Thus, DNA damage can be used as a biomarker in a reliable and accurate way to quantify for example radiation exposure and can indicate its possible long term effects and cancer risk. Based on the type of DNA lesions detected one can hypothesize on the most probable mechanisms involved in the formation of these lesions for example in the case of UV and ionizing radiation (e.g., X- or α-, γ-rays, energetic ions, neutrons). In this review we describe the most accepted chemical pathways for DNA damage induction and the different types of DNA lesions, i.e., single, complex DNA lesions etc. that can be used as DNA damage biomarkers. We critically compare DNA damage detection methods and their limitations. In addition, we suggest the use of DNA repair gene products as biomarkes for identification of different types of stresses i.e., radiation, oxidative, or replication stress, based on bioinformatic approaches and meta-analysis of literature data.
Collapse
Affiliation(s)
- Zacharenia Nikitaki
- DNA Damage and Repair Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens Athens, Greece
| | - Christine E Hellweg
- Radiation Biology Department, German Aerospace Center (DLR), Institute of Aerospace Medicine Köln, Germany
| | - Alexandros G Georgakilas
- DNA Damage and Repair Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens Athens, Greece
| | - Jean-Luc Ravanat
- Laboratoire des Lésions des Acides Nucléiques, Institut des Nanosciences et Cryogénie, Service de Chimie Inorgranique et Biologique, Université Grenoble Alpes Grenoble, France ; CEA, Institut des Nanosciences et Cryogénie, Service de Chimie Inorgranique et Biologique Grenoble, France
| |
Collapse
|
177
|
Brissos RF, Caubet A, Gamez P. Possible DNA-Interacting Pathways for Metal-Based Compounds Exemplified with Copper Coordination Compounds. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500175] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
178
|
Greer EM, Quezada CS, Cosgriff CV. Butylated hydroxytoluene enediyne: access to diradical and electrophilic quinone methide intermediates. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Edyta M. Greer
- Department of Natural Sciences; Baruch College; 17 Lexington Ave 10010 New York NY USA
| | - Cesar S. Quezada
- Department of Natural Sciences; Baruch College; 17 Lexington Ave 10010 New York NY USA
| | | |
Collapse
|
179
|
Li A, Liu YH, Yuan LZ, Ma ZY, Zhao CL, Xie CZ, Bao WG, Xu JY. Association of structural modifications with bioactivity in three new copper(II) complexes of Schiff base ligands derived from 5-chlorosalicylaldehyde and amino acids. J Inorg Biochem 2015; 146:52-60. [DOI: 10.1016/j.jinorgbio.2015.02.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/20/2015] [Accepted: 02/20/2015] [Indexed: 12/13/2022]
|
180
|
Pradeepa SM, Bhojya Naik HS, Vinay Kumar B, Indira Priyadarsini K, Barik A, Prabhakara MC. DNA binding, photoactivated DNA cleavage and cytotoxic activity of Cu(II) and Co(II) based Schiff-base azo photosensitizers. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 141:34-42. [PMID: 25659740 DOI: 10.1016/j.saa.2015.01.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 12/12/2014] [Accepted: 01/14/2015] [Indexed: 06/04/2023]
Abstract
A new class of Cu(II) and Co(II) complexes of azo-containing Schiff base of the type [Cu(L1)2] and [Co(L1)2], where L1=4-[(E)-{2-hydroxy-3-[(E)-(4-bromophenyl)diazenyl]benzylidene}amino]benzoic acid have been synthesized and characterized. Extension of conjugation and the presence of free carboxylic acid group of the ligand L1 increased the wavelength of the complexes from visible region to the near IR region (620-850 nm). The Cu(II) and Co(II) complexes interacted with CT-DNA via intercalative mode with the respective Kb value of 3.2×10(4) M(-1) and 2.9×10(4) M(-1) and acted as proficient photocleavers of SC pUC19 DNA in UV-A light, forming (1)O2 as the reactive oxygen species with the quantum yield of 0.38 and 0.36, respectively. Furthermore, the Cu(II) and Co(II) complexes showed photocytotoxicity toward two selected tumor cell lines MCF-7 and A549 by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide (MTT) method, and the Cu(II) complex exhibits higher photocytotoxicity than Co(II) complex against each of the selected cell lines, this result is identical with their DNA binding ability order.
Collapse
Affiliation(s)
- S M Pradeepa
- Department of Studies and Research in Industrial Chemistry, Kuvempu University, Shankaraghatta 577 451, Shimoga, India
| | - H S Bhojya Naik
- Department of Studies and Research in Industrial Chemistry, Kuvempu University, Shankaraghatta 577 451, Shimoga, India.
| | - B Vinay Kumar
- Department of Chemistry, R N Shetty Institute of Technology, Uttarahalli Road, Channasandra, Bengaluru 560 098, India
| | - K Indira Priyadarsini
- Radiation Chemistry Section, Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Atanu Barik
- Radiation Chemistry Section, Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - M C Prabhakara
- Department of Studies and Research in Industrial Chemistry, Sir. M. V. Govt. Science College, Bommanakatte, Bhadravathi 577 302, India
| |
Collapse
|
181
|
Raja K, Suseelamma A, Reddy KH. Synthesis, spectral properties, DNA binding interactions and DNA cleavage studies of lanthanide (III) complexes of 2-acetylpyridine acetoylhydrazone: the X-ray crystal structure of 10-coordinate Ce (III) and Sm (III) complexes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2015. [DOI: 10.1007/s13738-015-0624-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
182
|
Li M, Diao L, Liao X, Kou L, Lu W. DFT study on addition reaction mechanism of guanine-cytosine base pair with OH radical. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3434] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Minjie Li
- Department of Chemistry, Innovative Drug Research Center, College of Sciences; Shanghai University; Shanghai 200444 China
| | - Ling Diao
- Department of Chemistry, Innovative Drug Research Center, College of Sciences; Shanghai University; Shanghai 200444 China
| | - Xiaofei Liao
- School of Information Science and Technology; Donghua University; Shanghai 201620 China
| | - Li Kou
- Department of Chemistry, Innovative Drug Research Center, College of Sciences; Shanghai University; Shanghai 200444 China
| | - Wencong Lu
- Department of Chemistry, Innovative Drug Research Center, College of Sciences; Shanghai University; Shanghai 200444 China
| |
Collapse
|
183
|
Li MD, Dang L, Liu M, Du L, Zheng X, Phillips DL. Ultrafast Time Resolved Spectroscopic Studies on the Generation of the Ketyl-Sugar Biradical by Intramolecular Hydrogen Abstraction among Ketoprofen and Purine Nucleoside Dyads. J Org Chem 2015; 80:3462-70. [DOI: 10.1021/acs.joc.5b00047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ming-De Li
- Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P.R. China
| | - Li Dang
- Department
of Chemistry, South University of Science and Technology of China, Shenzhen, Guangdong 518055, China
| | - Mingyue Liu
- Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P.R. China
| | - Lili Du
- Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P.R. China
| | - Xuming Zheng
- Department
of Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - David Lee Phillips
- Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong S.A.R., P.R. China
| |
Collapse
|
184
|
Affiliation(s)
- Gebhard Haberhauer
- Institut
für Organische Chemie, Universität Duisburg-Essen, Universitätsstrasse
7, D-45117 Essen, Germany
| | - Rolf Gleiter
- Organisch-Chemisches
Institut, Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| | - Sven Fabig
- Institut
für Organische Chemie, Universität Duisburg-Essen, Universitätsstrasse
7, D-45117 Essen, Germany
| |
Collapse
|
185
|
Rác M, Křupka M, Binder S, Sedlářová M, Matušková Z, Raška M, Pospíšil P. Oxidative damage of U937 human leukemic cells caused by hydroxyl radical results in singlet oxygen formation. PLoS One 2015; 10:e0116958. [PMID: 25730422 PMCID: PMC4346403 DOI: 10.1371/journal.pone.0116958] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 12/17/2014] [Indexed: 12/05/2022] Open
Abstract
The exposure of human cells to oxidative stress leads to the oxidation of biomolecules such as lipids, proteins and nuclei acids. In this study, the oxidation of lipids, proteins and DNA was studied after the addition of hydrogen peroxide and Fenton reagent to cell suspension containing human leukemic monocyte lymphoma cell line U937. EPR spin-trapping data showed that the addition of hydrogen peroxide to the cell suspension formed hydroxyl radical via Fenton reaction mediated by endogenous metals. The malondialdehyde HPLC analysis showed no lipid peroxidation after the addition of hydrogen peroxide, whereas the Fenton reagent caused significant lipid peroxidation. The formation of protein carbonyls monitored by dot blot immunoassay and the DNA fragmentation measured by comet assay occurred after the addition of both hydrogen peroxide and Fenton reagent. Oxidative damage of biomolecules leads to the formation of singlet oxygen as conformed by EPR spin-trapping spectroscopy and the green fluorescence of singlet oxygen sensor green detected by confocal laser scanning microscopy. It is proposed here that singlet oxygen is formed by the decomposition of high-energy intermediates such as dioxetane or tetroxide formed by oxidative damage of biomolecules.
Collapse
Affiliation(s)
- Marek Rác
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 11, 783 71, Olomouc, Czech Republic
| | - Michal Křupka
- Department of Immunology, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15, Olomouc, Czech Republic
| | - Svatopluk Binder
- Department of Medical Biophysics, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15, Olomouc, Czech Republic
| | - Michaela Sedlářová
- Department of Botany, Faculty of Science, Palacký University, Šlechtitelů 11, 783 71, Olomouc, Czech Republic
| | - Zuzana Matušková
- Department of Pharmacology and Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15, Olomouc, Czech Republic
| | - Milan Raška
- Department of Immunology, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 3, 775 15, Olomouc, Czech Republic
| | - Pavel Pospíšil
- Department of Biophysics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 11, 783 71, Olomouc, Czech Republic
| |
Collapse
|
186
|
Hussein MA, Guan TS, Haque RA, Khadeer Ahamed MB, Abdul Majid AMS. Mononuclear dioxomolybdenum(VI) thiosemicarbazonato complexes: Synthesis, characterization, structural illustration, in vitro DNA binding, cleavage, and antitumor properties. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt C:1335-1348. [PMID: 25456676 DOI: 10.1016/j.saa.2014.10.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 08/13/2014] [Accepted: 10/09/2014] [Indexed: 06/04/2023]
Abstract
Four dioxomolybdenum(VI) complexes were synthesized by reacting [MoO2(acac)2] with N-ethyl-2-(5-bromo-2-hydroxybenzylidene) hydrazinecarbothioamide (1), N-ethyl-2-(5-allyl-3-methoxy-2-hydroxybenzylidene) hydrazinecarbothioamide (2), N-methyl-2-(3-tert-butyl-2-hydroxybenzylidene) hydrazinecarbothioamide (3), and N-ethyl-2-(3-methyl-2-hydroxybenzylidene) hydrazinecarbothioamide (4). The molecular structures of 1, 2, and all the synthesized complexes were determined using single crystal X-ray crystallography. The binding properties of the ligand and complexes with calf thymus DNA (CT-DNA) were investigated via UV, fluorescence titrations, and viscosity measurement. Gel electrophoresis revealed that all the complexes cleave pBR 322 plasmid DNA. The cytotoxicity of the complexes were studied against the HCT 116 human colorectal cell line. All the complexes exhibited more pronounced activity than the standard reference drug 5-fluorouracil (IC50 7.3μM). These studies show that dioxomolybdenum(VI) complexes could be potentially useful in chemotherapy.
Collapse
Affiliation(s)
- Mouayed A Hussein
- School of Chemical Science, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Teoh S Guan
- School of Chemical Science, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia.
| | - Rosenani A Haque
- School of Chemical Science, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Mohamed B Khadeer Ahamed
- EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| | - Amin M S Abdul Majid
- EMAN Research and Testing Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Minden, Pulau Pinang, Malaysia
| |
Collapse
|
187
|
Mehta JV, Gajera SB, Patel MN. Antimalarial, antimicrobial, cytotoxic, DNA interaction and SOD like activities of tetrahedral copper(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt C:1881-1892. [PMID: 25467683 DOI: 10.1016/j.saa.2014.10.103] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 10/01/2014] [Accepted: 10/23/2014] [Indexed: 06/04/2023]
Abstract
The mononuclear copper(II) complexes with P, O-donor ligand and different fluoroquinolones have been synthesized and characterized by elemental analysis, electronic spectra, TGA, EPR, FT-IR and LC-MS spectroscopy. An antimicrobial efficiency of the complexes has been tested against five different microorganisms in terms of minimum inhibitory concentration (MIC) and displays very good antimicrobial activity. The binding strength and binding mode of the complexes with Herring Sperm DNA (HS DNA) have been investigated by absorption titration and viscosity measurement studies. The studies suggest the classical intercalative mode of DNA binding. Gel electrophoresis assay determines the ability of the complexes to cleave the supercoiled form of pUC19 DNA. Synthesized complexes have been tested for their SOD mimic activity using nonenzymatic NBT/NADH/PMS system and found to have good antioxidant activity. All the complexes show good cytotoxic and in vitro antimalarial activities.
Collapse
Affiliation(s)
- Jugal V Mehta
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388 120, Gujarat, India
| | - Sanjay B Gajera
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388 120, Gujarat, India
| | - Mohan N Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar 388 120, Gujarat, India.
| |
Collapse
|
188
|
Akamatsu K, Shikazono N, Saito T. Localization estimation of ionizing radiation-induced abasic sites in DNA in the solid state using fluorescence resonance energy transfer. Radiat Res 2015; 183:105-13. [PMID: 25564720 DOI: 10.1667/rr13780.1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Clustered DNA damage is considered an important factor in determining the biological consequences of ionizing radiation. In this study, we successfully estimated the localization of abasic sites (APs) in DNA exposed to ionizing radiation using fluorescence resonance energy transfer (FRET) without any involvement of repair enzyme functions. A linearized plasmid (pUC19 digested by Sma I) was irradiated with: (60)Co γ rays; (4)He(2+) (2.0 MeV/u) particles; and the (12)C(5+) (0.37 MeV/u) particles in the solid state. A donor or acceptor fluorescent probe with a nucleophilic O-amino group was used to label APs. The results showed that the (12)C(5+) particle likely produced close APs within a track. The apparent distance calculated from the observed FRET efficiency (E) of around 0.10 was estimated to be approximately 17 base pairs. On the other hand, E values of (60)Co γ rays and the (4)He(2+) beam were less than those of the (12)C(5+) beam, increased with increasing AP density (the average number of APs per base pair), and were slightly greater than those of randomly distributed APs. We propose that the FRET method provides a degree of localization regardless of whether an AP cluster is single-stranded or bistranded DNA damage.
Collapse
Affiliation(s)
- Ken Akamatsu
- a Irradiation Cell Analysis Group, Quantum Beam Science Directorate, Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizugawa, Kyoto 619-0215, Japan
| | | | | |
Collapse
|
189
|
Ding PG, Zou R, Yang X, Zhang D, Zhao Y, Ye Y. Synthesis, Characterization, and Oxidative Cleavage Activities of Binaphthol-Modified Cyclotriphosphazene Bidentate Ligands. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.914938] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
190
|
Westphal K, Wiczk J, Miloch J, Kciuk G, Bobrowski K, Rak J. Irreversible electron attachment – a key to DNA damage by solvated electrons in aqueous solution. Org Biomol Chem 2015; 13:10362-9. [DOI: 10.1039/c5ob01542a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In an aqueous solution trinucleotides labeled with bromonucleobases are damaged by ionizing radiation induced electrons while native trimers are insensitive to electrons under the same conditions.
Collapse
Affiliation(s)
- K. Westphal
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | - J. Wiczk
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | - J. Miloch
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| | - G. Kciuk
- Centre of Radiation Research and Technology
- Institute of Nuclear Chemistry and Technology
- 03-195 Warsaw
- Poland
| | - K. Bobrowski
- Centre of Radiation Research and Technology
- Institute of Nuclear Chemistry and Technology
- 03-195 Warsaw
- Poland
| | - J. Rak
- Faculty of Chemistry
- University of Gdańsk
- 80-308 Gdańsk
- Poland
| |
Collapse
|
191
|
Chitrapriya N, Shin JH, Hwang IH, Kim Y, Kim C, Kim SK. Synthesis, DNA binding profile and DNA cleavage pathway of divalent metal complexes. RSC Adv 2015. [DOI: 10.1039/c5ra10695h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Divalent metal complexes of dipyridylamine ligand with an anthracene moiety induced considerable oxidative DNA cleavage in the presence hydrogen peroxide and dioxygen.
Collapse
Affiliation(s)
| | - Jong Heon Shin
- Department of Chemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - In Hong Hwang
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
| | - Youngmee Kim
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Republic of Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
| | - Seog K. Kim
- Department of Chemistry
- Yeungnam University
- Gyeongsan
- Republic of Korea
| |
Collapse
|
192
|
Mixed-ligand copper(II) phenolate complexes: Synthesis, spectral characterization, phosphate-hydrolysis, antioxidant, DNA interaction and cytotoxic studies. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.09.070] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
193
|
Dasari S, Patra AK. Luminescent europium and terbium complexes of dipyridoquinoxaline and dipyridophenazine ligands as photosensitizing antennae: structures and biological perspectives. Dalton Trans 2015; 44:19844-55. [DOI: 10.1039/c5dt02852c] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Luminescent europium and terbium complexes of quinoxaline and phenazine ligands were studied for their structures, luminescence properties, interaction with DNA, and photo-induced DNA cleavage activity.
Collapse
Affiliation(s)
- Srikanth Dasari
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Ashis K. Patra
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| |
Collapse
|
194
|
Hussein MA, Guan TS, Haque RA, Ahamed MBK, Majid AMA. Synthesis and characterization of thiosemicarbazonato molybdenum(VI) complexes: In vitro DNA binding, cleavage, and antitumor activities. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.02.048] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
195
|
Jin L, Zhao C, Zhang T, Wang Z, Min S, Wang W, Wei Y. Effects of an acid–alkaline environment on the reactivity of 5-carboxycytosine with hydroxyl radicals. RSC Adv 2015. [DOI: 10.1039/c5ra17393k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The addition of ˙OH to C5C6 double bond and abstraction of H5 from 5-caCyt are more favourable in neutral, acidic and alkaline conditions.
Collapse
Affiliation(s)
- Lingxia Jin
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- School of Chemical & Environment Science
- Shaanxi University of Technology
- Hanzhong
- China
| | - Caibin Zhao
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- School of Chemical & Environment Science
- Shaanxi University of Technology
- Hanzhong
- China
| | - Tianlei Zhang
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- School of Chemical & Environment Science
- Shaanxi University of Technology
- Hanzhong
- China
| | - Zhiyin Wang
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- School of Chemical & Environment Science
- Shaanxi University of Technology
- Hanzhong
- China
| | - Suotian Min
- Shaanxi Province Key Laboratory of Catalytic Fundamentals & Applications
- School of Chemical & Environment Science
- Shaanxi University of Technology
- Hanzhong
- China
| | - Wenliang Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi’an 710062
- China
| | - Yawen Wei
- Institute of Publication Science
- Chang’an University
- Xi’an 710064
- China
| |
Collapse
|
196
|
Gao CY, Ma ZY, Zhang YP, Li ST, Gu W, Liu X, Tian JL, Xu JY, Zhao JZ, Yan SP. Four related mixed-ligand nickel(ii) complexes: effect of steric encumbrance on the structure, DNA/BSA binding, DNA cleavage and cytotoxicity. RSC Adv 2015. [DOI: 10.1039/c4ra16755d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Four new interrelated mixed-ligand nickel(ii) complexes have been synthesized and characterized. The activities of DNA binding/cleavage, BSA binding with complexes and the vitro cytotoxicity also have been explored.
Collapse
|
197
|
Zheng YC, Zheng ML, Li K, Chen S, Zhao ZS, Wang XS, Duan XM. Novel carbazole-based two-photon photosensitizer for efficient DNA photocleavage in anaerobic condition using near-infrared light. RSC Adv 2015. [DOI: 10.1039/c4ra11133h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel carbazole derivatives are first reported as two-photon photosensitizers for DNA photodamage under near-infrared light exposure.
Collapse
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
| | - 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
| | - Ke Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- 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
| | - 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
| | - Xue-Song Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- 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
| |
Collapse
|
198
|
Zheng Y, Zhou Q, Lei W, Hou Y, Li K, Chen Y, Zhang B, Wang X. DNA photocleavage in anaerobic conditions by a Ru(ii) complex: a new mechanism. Chem Commun (Camb) 2015; 51:428-30. [DOI: 10.1039/c4cc06552b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Photoinduced homolytic cleavage of the Ru–O bond of a novel Ru(ii) complex leads to formation of ligand-based reactive radicals capable of breaking DNA in an oxygen-dependent manner and Ru fragments capable of binding DNA covalently.
Collapse
Affiliation(s)
- Yue Zheng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Qianxiong Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Wanhua Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Yuanjun Hou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Ke Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Yongjie Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Baowen Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Xuesong Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| |
Collapse
|
199
|
Ahmad S, Espinosa A, Ahmad T, Sohail M, Isab AA, Saleem M, Hameed A, Monim-ul-Mehboob M, Heras ÉDL. Synthesis, theoretical calculations and antimicrobial studies of copper(I) complexes of cysteamine, cysteine and 2-mercaptonicotinic acid. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.08.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
200
|
Williamson JD, Sadofsky LR, Hart SP. The pathogenesis of bleomycin-induced lung injury in animals and its applicability to human idiopathic pulmonary fibrosis. Exp Lung Res 2014; 41:57-73. [PMID: 25514507 DOI: 10.3109/01902148.2014.979516] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a devastating disease of unknown etiology, for which there is no curative pharmacological therapy. Bleomycin, an anti-neoplastic agent that causes lung fibrosis in human patients has been used extensively in rodent models to mimic IPF. In this review, we compare the pathogenesis and histological features of human IPF and bleomycin-induced pulmonary fibrosis (BPF) induced in rodents by intratracheal delivery. We discuss the current understanding of IPF and BPF disease development, from the contribution of alveolar epithelial cells and inflammation to the role of fibroblasts and cytokines, and draw conclusions about what we have learned from the intratracheal bleomycin model of lung fibrosis.
Collapse
Affiliation(s)
- James D Williamson
- Hull York Medical School, Centre for Cardiovascular and Metabolic Research, Academic Respiratory Medicine , Castle Hill Hospital, Hull , United Kingdom
| | | | | |
Collapse
|