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Kompella P, Wang G, Durrett RE, Lai Y, Marin C, Liu Y, Habib SL, DiGiovanni J, Vasquez KM. Obesity increases genomic instability at DNA repeat-mediated endogenous mutation hotspots. Nat Commun 2024; 15:6213. [PMID: 39043652 PMCID: PMC11266421 DOI: 10.1038/s41467-024-50006-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 06/26/2024] [Indexed: 07/25/2024] Open
Abstract
Obesity is associated with increased cancer risk, yet the underlying mechanisms remain elusive. Obesity-associated cancers involve disruptions in metabolic and cellular pathways, which can lead to genomic instability. Repetitive DNA sequences capable of adopting alternative DNA structures (e.g., H-DNA) stimulate mutations and are enriched at mutation hotspots in human cancer genomes. However, it is not known if obesity impacts DNA repeat-mediated endogenous mutation hotspots. We address this gap by measuring mutation frequencies in obese and normal-weight transgenic reporter mice carrying either a control human B-DNA- or an H-DNA-forming sequence (from a translocation hotspot in c-MYC in Burkitt lymphoma). Here, we discover that H-DNA-induced DNA damage and mutations are elevated in a tissue-specific manner, and DNA repair efficiency is reduced in obese mice compared to those on the control diet. These findings elucidate the impact of obesity on cancer-associated endogenous mutation hotspots, providing mechanistic insight into the link between obesity and cancer.
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Affiliation(s)
- Pallavi Kompella
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, Austin, TX, USA
| | - Guliang Wang
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, Austin, TX, USA
| | - Russell E Durrett
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, USA
| | - Yanhao Lai
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA
| | - Celeste Marin
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA
| | - Yuan Liu
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA
| | - Samy L Habib
- South Texas Veterans Health Care System, San Antonio, TX, USA
| | - John DiGiovanni
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, Austin, TX, USA
| | - Karen M Vasquez
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, Austin, TX, USA.
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2
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Wang ZX, Liu KQ, Jiang ZT, Meng XY, Li F, Wu KC, Li HY, Wang W. A MELET- and IFE-based UV-visible luminescent ratiometric probe for quantization of mercury(II) and nitrofurantoin in environmental sewage. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124805. [PMID: 39003827 DOI: 10.1016/j.saa.2024.124805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 06/17/2024] [Accepted: 07/09/2024] [Indexed: 07/16/2024]
Abstract
A novel fluorimetric ratiometric probe of green and eco-friendily nitrogen-enriched, oxygen-doped carbon nanodots (Cnanodots) was prepared for the quantitative analysis of mercury(II) (HgII) and nitrofurantoin (Nit) in the environmental sewage. The Cnanodots exhibits dual-emission peaks respectively at 345 and 445 nm under 285 nm excitation, with excitation-independent properties. Unexpectedly, this Cnanodots displays two obvious ratiometric responses to HgII and Nit through decreasing the signal at 345 nm and remaining invariable at 445 nm. Experimental results confirm that the highly sensitive analysis of HgII and Nit are achieved respectively based on matching energy-level electron transfer and inner filter effect mechanisms. The fluorescence (FL) ratiometric intensity of [FL345nm/FL445nm] expresses a good linear relationship with the concentration of HgII in the scope of 0.01-20 μM, while the logarithm of [Log(FL0345nm-FL345nm)] on the quenching degree of the probe by Nit also shows a good linear correlation within the range of 0.01-100 μM. The detection limits were calculated to be 4.14 nM for HgII, and 7.84 nM for Nit. Moreover, recovery experiments of Cnanodots for HgII and Nit sensing in real sewage samples obtained satisfactory results, comfirming the feasibility of practical application.
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Affiliation(s)
- Zhong-Xia Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China; State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China.
| | - Kai-Qi Liu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Zhen-Tao Jiang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Xiang-Ying Meng
- School of Medical Laboratory, Shandong Second Medical University, Weifang, Shandong 261053, China
| | - Feng Li
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Ke-Chen Wu
- Fujian Key Laboratory of Advanced Marine Materials, Minjiang University, Fuzhou, Fujian 350108, China
| | - Heng-Ye Li
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China.
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3
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Zima V, Gladwish O, Marek A, Tureček F. Nucleoside Cation Radicals: Generation, Radical-Induced Hydrogen Atom Migrations, and Ribose Ring Cleavage in the Gas Phase. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:1594-1608. [PMID: 38842116 DOI: 10.1021/jasms.4c00198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Nucleoside ions that were furnished on ribose with a 2'-O-acetyl radical group were generated in the gas phase by multistep collision-induced dissociation of precursor ions tagged with radical initiator groups, and their chemistry was investigated in the gas phase. 2'-O-Acetyladenosine cation radicals were found to undergo hydrogen transfer to the acetoxyl radical from the ribose ring positions that were elucidated using specific deuterium labeling of 1'-H, 2'-H, and 4'-H and in the N-H and O-H exchangeable positions, favoring 4'-H transfer. Ion structures and transition-state energies were calculated by a combination of Born-Oppenheimer molecular dynamics and density functional theory and used to obtain unimolecular rate constants for competitive hydrogen transfer and loss of the acetoxyl radical. Migrations to the acetoxyl radical of ribose hydrogens 1'-H, 2'-H, 3'-H, and 4'-H were all exothermic, but product formation was kinetically controlled. Both Rice-Ramsperger-Kassel-Marcus (RRKM) and transition-state theory (TST) calculations indicated preferential migration of 4'-H in a qualitative agreement with the deuterium labeling results. The hydrogen migrations displayed substantial isotope effects that along with quantum tunneling affected the relative rate constants and reaction branching ratios. UV-vis action spectroscopy indicated that the cation radicals from 2'-O-acetyladenosine consisted of a mixture of isomers. Radical-driven dissociations were also observed for protonated guanosine, cytosine, and thymidine conjugates. However, for those nucleoside ions and cation radicals, the dissociations were dominated by the loss of the nucleobase or formation of protonated nucleobase ions.
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Affiliation(s)
- Václav Zima
- Department of Chemistry, University of Washington, 351700 Bagley Hall, Seattle, Washington 98195-1700, United States
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 166 10 Prague, Czech Republic
| | - Owen Gladwish
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106-7078, United States
| | - Aleš Marek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 166 10 Prague, Czech Republic
| | - František Tureček
- Department of Chemistry, University of Washington, 351700 Bagley Hall, Seattle, Washington 98195-1700, United States
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4
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Das R, Karri R, Chalana A, Rai RK, Roy G. Uncovering the Role of Methylmercury on DNA Lesions at Cytotoxic Concentrations in Glutathione-Depleted Cells: Insights from Experimental and Computational Studies. Inorg Chem 2024; 63:10455-10465. [PMID: 38743433 DOI: 10.1021/acs.inorgchem.3c04579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Organomercurials (RHg+), especially methylmercury (MeHg+) and ethylmercury (EtHg+), are considered to be more neurotoxic than the inorganic counterpart (Hg2+). They cause massive DNA damage in cells, especially in neurons, where cellular glutathione (GSH) levels are significantly low. However, the mechanism by which RHg+ exerts massive DNA damage at cytotoxic concentrations in brain cells remains obscure. In this study, we investigated the effect of RHg+ on the structural and electronic properties of nucleosides and its effects on DNA damage. The direct interaction of RHg+ with the nucleoside significantly weakens N-glycosidic bonds, decreases the C-H bond energy of sugar moieties, and increases the electrophilicity of the C8-center of purine bases. As a consequence, RHg+-conjugated DNA molecules are extremely labile and highly sensitive to any nucleophiles/radicals present in GSH-depleted cells and, thus, undergo enhanced oxidative and unusual alkylative DNA damage. We also report a functional model of organomercurial lyase, which showed excellent cytoprotective effect against RHg+-induced cytotoxicity; this reverses the activity of glutathione reductase inhibited by MeHgCl and ceases oxidative and alkylating DNA damage. This intriguing finding provides new mechanistic insight into the mode of action of organomercurials in GSH-depleted cells and their adverse effects on individuals with neurodegenerative disorders associated with oxidative stress.
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Affiliation(s)
- Ranajit Das
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Dadri, UP 201314, India
| | - Ramesh Karri
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Dadri, UP 201314, India
- Ruhvenile Biomedical OPC Pvt. Ltd., New Delhi 110070, Delhi, India
| | - Ashish Chalana
- Centre for Development of Biomaterials, Department of Chemistry & Biochemistry, Sharda University, Greater Noida, UP 201306, India
| | - Rakesh Kumar Rai
- Department of Chemistry, Indian Institute of Technology Tirupati, Tirupati, AP 517619, India
| | - Gouriprasanna Roy
- Department of Chemistry, Indian Institute of Technology Tirupati, Tirupati, AP 517619, India
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Möller C, Virzi J, Chang YJ, Keidel A, Chao MR, Hu CW, Cooke MS. DNA modifications: Biomarkers for the exposome? ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2024; 108:104449. [PMID: 38636743 DOI: 10.1016/j.etap.2024.104449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/25/2024] [Accepted: 04/12/2024] [Indexed: 04/20/2024]
Abstract
The concept of the exposome is the encompassing of all the environmental exposures, both exogenous and endogenous, across the life course. Many, if not all, of these exposures can result in the generation of reactive species, and/or the modulation of cellular processes, that can lead to a breadth of modifications of DNA, the nature of which may be used to infer their origin. Because of their role in cell function, such modifications have been associated with various major human diseases, including cancer, and so their assessment is crucial. Historically, most methods have been able to only measure one or a few DNA modifications at a time, limiting the information available. With the development of DNA adductomics, which aims to determine the totality of DNA modifications, a far more comprehensive picture of the DNA adduct burden can be gained. Importantly, DNA adductomics can facilitate a "top-down" investigative approach whereby patterns of adducts may be used to trace and identify the originating exposure source. This, together with other 'omic approaches, represents a major tool for unraveling the complexities of the exposome and hence allow a better a understanding of the environmental origins of disease.
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Affiliation(s)
- Carolina Möller
- Oxidative Stress Group, Department of Molecular Biosciences, University of South Florida, Tampa, FL 33620, USA.
| | - Jazmine Virzi
- Oxidative Stress Group, Department of Molecular Biosciences, University of South Florida, Tampa, FL 33620, USA
| | - Yuan-Jhe Chang
- Department of Occupational Safety and Health, Chung Shan Medical University, Taichung 402, Taiwan
| | - Alexandra Keidel
- Oxidative Stress Group, Department of Molecular Biosciences, University of South Florida, Tampa, FL 33620, USA
| | - Mu-Rong Chao
- Department of Occupational Safety and Health, Chung Shan Medical University, Taichung 402, Taiwan; Department of Occupational Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan
| | - Chiung-Wen Hu
- Department of Public Health, Chung Shan Medical University, Taichung 402, Taiwan
| | - Marcus S Cooke
- Oxidative Stress Group, Department of Molecular Biosciences, University of South Florida, Tampa, FL 33620, USA; College of Public Health, University of South Florida, Tampa, FL 33620, USA; Cancer Biology and Evolution Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL 33612, USA.
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6
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Dantu SC, Khalil M, Bria M, Saint-Pierre C, Orio M, Gasparutto D, Sicoli G. Cleaving DNA with DNA: Cooperative Tuning of Structure and Reactivity Driven by Copper Ions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306710. [PMID: 38419268 DOI: 10.1002/advs.202306710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 01/15/2024] [Indexed: 03/02/2024]
Abstract
A copper-dependent self-cleaving DNA (DNAzyme or deoyxyribozyme) previously isolated by in vitro selection has been analyzed by a combination of Molecular Dynamics (MD) simulations and advanced Electron Paramagnetic Resonance (Electron Spin Resonance) EPR/ESR spectroscopy, providing insights on the structural and mechanistic features of the cleavage reaction. The modeled 46-nucleotide deoxyribozyme in MD simulations forms duplex and triplex sub-structures that flank a highly conserved catalytic core. The DNA self-cleaving construct can also form a bimolecular complex that has a distinct substrate and enzyme domains. The highly dynamic structure combined with an oxidative site-specific cleavage of the substrate are two key-aspects to elucidate. By combining EPR/ESR spectroscopy with selectively isotopically labeled nucleotides it has been possible to overcome the major drawback related to the "metal-soup" scenario, also known as "super-stoichiometric" ratios of cofactors versus substrate, conventionally required for the DNA cleavage reaction within those nucleic acids-based enzymes. The focus on the endogenous paramagnetic center (Cu2+) here described paves the way for analysis on mixtures where several different cofactors are involved. Furthermore, the insertion of cleavage reaction within more complex architectures is now a realistic perspective towards the applicability of EPR/ESR spectroscopic studies.
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Affiliation(s)
- Sarath Chandra Dantu
- Department of Computer Science, Brunel University London, Kingston Lane, Uxbridge, UB8 3PH, UK
| | - Mahdi Khalil
- LASIRE, CNRS UMR 8516, University of Lille, C4 building, Avenue Paul Langevin, Villeneuve d'Ascq, F-59655, France
| | - Marc Bria
- Michle-Eugène Chevreul Institute, FR 2638, Avenue Paul Langevin, Villeneuve d'Ascq, F-59655, France
| | - Christine Saint-Pierre
- Université Grenoble Alpes, CEA, CNRS, UMR 5819 SyMMES-CREAB, Avenue des Martyrs, Grenoble, F-38000, France
| | - Maylis Orio
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, UMR CNRS 7313, Marseille, 13397, France
| | - Didier Gasparutto
- Université Grenoble Alpes, CEA, CNRS, UMR 5819 SyMMES-CREAB, Avenue des Martyrs, Grenoble, F-38000, France
| | - Giuseppe Sicoli
- LASIRE, CNRS UMR 8516, University of Lille, C4 building, Avenue Paul Langevin, Villeneuve d'Ascq, F-59655, France
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7
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Wierzbicka P, Abdoul-Carime H, Kopyra J. Fragmentation of 5-fluorouridine induced by low energy (< 12 eV) electrons: insights into the radiosensitization of DNA. Phys Chem Chem Phys 2024; 26:8761-8766. [PMID: 38419552 DOI: 10.1039/d3cp04745h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
5-Fluorouracil is now routinely used in chemo- and radiotherapy. Incorporated within DNA, the molecule is bound to the sugar backbone, forming the 5-fluorouridine sub-unit investigated in the present work. For the clinical usage of the latter, no information exists on the mechanisms that control the radiosensitizing effect at the molecular level. As low energy (< 12 eV) electrons are abundantly produced along the radiation tracks during cancer treatment using beams of high energy particles, we study how these ballistic secondary electrons damage the sensitizing molecule. The salient result from our study shows that the N-glycosidic bonds are principally affected with a cross-section of approximately two orders of magnitude higher than the canonical thymidine, reflecting to some degree the surviving factor of radiation-treated carcinoma cells with and without 5-fluorouracil incorporation. This result may help in the comprehension of the radiosensitizing effect of the fluoro-substituted thymidine in DNA.
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Affiliation(s)
- Paulina Wierzbicka
- Faculty of Sciences, Siedlce University, 3 Maja 54, Siedlce 08-110, Poland.
| | - Hassan Abdoul-Carime
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR5306, Villeurbanne F-69622, France
| | - Janina Kopyra
- Faculty of Sciences, Siedlce University, 3 Maja 54, Siedlce 08-110, Poland.
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8
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Zima V, Marek A, Tureček F. Competitive Radical Migrations and Ribose Ring Cleavage in Adenosine and 2'-Deoxyadenosine Cation Radicals. J Phys Chem A 2024; 128:1109-1123. [PMID: 38316031 DOI: 10.1021/acs.jpca.3c07906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
We report a combined experimental and computational study of adenosine cation radicals that were protonated at adenine and furnished with a radical handle in the form of an acetoxyl radical, •CH2COO, that was attached to ribose 5'-O. Radicals were generated by collision-induced dissociation (CID) and characterized by tandem mass spectrometry and UV-vis photodissociation action spectroscopy. The acetoxyl radical was used to probe the kinetics of intramolecular hydrogen transfer from the ribose ring positions that were specifically labeled with deuterium at C1', C2', C3', C4', C5', and in the exchangeable hydroxyl groups. Hydrogen transfer was found to chiefly involve 3'-H with minor contributions by 5'-H and 2'-H, while 4'-H was nonreactive. The hydrogen transfer rates were affected by deuterium isotope effects. Hydrogen transfer triggered ribose ring cleavage by consecutive dissociations of the C4'-O and C1'-C2' bonds, resulting in expulsion of a C6H9O4 radical and forming a 9-formyladenine ion. Rice-Ramsperger-Kassel-Marcus (RRKM) and transition-state theory (TST) calculations of unimolecular constants were carried out using the effective CCSD(T)/6-311++G(3d,2p) and M06-2X/aug-cc-pVTZ potential energy surfaces for major isomerizations and dissociations. The kinetic analysis showed that hydrogen transfer to the acetoxyl radical was the rate-determining step, whereas the following ring-opening reactions in ribose radicals were fast. Using DFT-computed energies, a comparison was made between the thermochemistry of radical reactions in adenosine and 2'-deoxyadenosine cation radicals. The 2'-deoxyribose ring showed lower TS energies for both the rate-determining 3'-H transfer and ring cleavage reactions.
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Affiliation(s)
- Václav Zima
- Department of Chemistry, University of Washington, Bagley Hall, Box 351700, Seattle, Washington 98195-1700, United States
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 166 10 Prague 6, Czech Republic
| | - Aleš Marek
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, 166 10 Prague 6, Czech Republic
| | - František Tureček
- Department of Chemistry, University of Washington, Bagley Hall, Box 351700, Seattle, Washington 98195-1700, United States
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9
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Caldecott KW. Causes and consequences of DNA single-strand breaks. Trends Biochem Sci 2024; 49:68-78. [PMID: 38040599 DOI: 10.1016/j.tibs.2023.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/20/2023] [Accepted: 11/03/2023] [Indexed: 12/03/2023]
Abstract
DNA single-strand breaks (SSBs) are among the most common lesions arising in human cells, with tens to hundreds of thousands arising in each cell, each day. Cells have efficient mechanisms for the sensing and repair of these ubiquitous DNA lesions, but the failure of these processes to rapidly remove SSBs can lead to a variety of pathogenic outcomes. The threat posed by unrepaired SSBs is illustrated by the existence of at least six genetic diseases in which SSB repair (SSBR) is defective, all of which are characterised by neurodevelopmental and/or neurodegenerative pathology. Here, I review current understanding of how SSBs arise and impact on critical molecular processes, such as DNA replication and gene transcription, and their links to human disease.
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Affiliation(s)
- Keith W Caldecott
- Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Falmer, Brighton, UK.
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10
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Andrés CMC, de la Lastra JMP, Juan CA, Plou FJ, Pérez-Lebeña E. Chemical Insights into Oxidative and Nitrative Modifications of DNA. Int J Mol Sci 2023; 24:15240. [PMID: 37894920 PMCID: PMC10607741 DOI: 10.3390/ijms242015240] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/09/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
This review focuses on DNA damage caused by a variety of oxidizing, alkylating, and nitrating species, and it may play an important role in the pathophysiology of inflammation, cancer, and degenerative diseases. Infection and chronic inflammation have been recognized as important factors in carcinogenesis. Under inflammatory conditions, reactive oxygen species (ROS) and reactive nitrogen species (RNS) are generated from inflammatory and epithelial cells, and result in the formation of oxidative and nitrative DNA lesions, such as 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG) and 8-nitroguanine. Cellular DNA is continuously exposed to a very high level of genotoxic stress caused by physical, chemical, and biological agents, with an estimated 10,000 modifications occurring every hour in the genetic material of each of our cells. This review highlights recent developments in the chemical biology and toxicology of 2'-deoxyribose oxidation products in DNA.
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Affiliation(s)
| | - José Manuel Pérez de la Lastra
- Institute of Natural Products and Agrobiology, CSIC-Spanish Research Council, Avda. AstrofísicoFco. Sánchez, 3, 38206 La Laguna, Spain
| | - Celia Andrés Juan
- Cinquima Institute and Department of Organic Chemistry, Faculty of Sciences, Valladolid University, Paseo de Belén, 7, 47011 Valladolid, Spain;
| | - Francisco J. Plou
- Institute of Catalysis and Petrochemistry, CSIC-Spanish Research Council, 28049 Madrid, Spain;
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11
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Fontaine M, Bartolami E, Prono M, Béal D, Blosi M, Costa AL, Ravagli C, Baldi G, Sprio S, Tampieri A, Fenoglio I, Tran L, Fadeel B, Carriere M. Nanomaterial genotoxicity evaluation using the high-throughput p53-binding protein 1 (53BP1) assay. PLoS One 2023; 18:e0288737. [PMID: 37713377 PMCID: PMC10503773 DOI: 10.1371/journal.pone.0288737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 07/04/2023] [Indexed: 09/17/2023] Open
Abstract
Toxicity evaluation of engineered nanomaterials is challenging due to the ever increasing number of materials and because nanomaterials (NMs) frequently interfere with commonly used assays. Hence, there is a need for robust, high-throughput assays with which to assess their hazard potential. The present study aimed at evaluating the applicability of a genotoxicity assay based on the immunostaining and foci counting of the DNA repair protein 53BP1 (p53-binding protein 1), in a high-throughput format, for NM genotoxicity assessment. For benchmarking purposes, we first applied the assay to a set of eight known genotoxic agents, as well as X-ray irradiation (1 Gy). Then, a panel of NMs and nanobiomaterials (NBMs) was evaluated with respect to their impact on cell viability and genotoxicity, and to their potential to induce reactive oxygen species (ROS) production. The genotoxicity recorded using the 53BP1 assay was confirmed using the micronucleus assay, also scored via automated (high-throughput) microscopy. The 53BP1 assay successfully identified genotoxic compounds on the HCT116 human intestinal cell line. None of the tested NMs showed any genotoxicity using the 53BP1 assay, except the positive control consisting in (CoO)(NiO) NMs, while only TiO2 NMs showed positive outcome in the micronucleus assay. Only Fe3O4 NMs caused significant elevation of ROS, not correlated to DNA damage. Therefore, owing to its adequate predictivity of the genotoxicity of most of the tested benchmark substance and its ease of implementation in a high throughput format, the 53BP1 assay could be proposed as a complementary high-throughput screening genotoxicity assay, in the context of the development of New Approach Methodologies.
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Affiliation(s)
- Maelle Fontaine
- CEA, CNRS, IRIG, SyMMES-CIBEST, Univ. Grenoble Alpes, Grenoble, France
| | - Eline Bartolami
- CEA, CNRS, IRIG, SyMMES-CIBEST, Univ. Grenoble Alpes, Grenoble, France
| | - Marion Prono
- CEA, CNRS, IRIG, SyMMES-CIBEST, Univ. Grenoble Alpes, Grenoble, France
| | - David Béal
- CEA, CNRS, IRIG, SyMMES-CIBEST, Univ. Grenoble Alpes, Grenoble, France
| | - Magda Blosi
- National Research Council, Institute of Science, Technology and Sustainability for Ceramic Materials ISSMC-CNR (Former ISTEC-CNR), Faenza, Italy
| | - Anna L. Costa
- National Research Council, Institute of Science, Technology and Sustainability for Ceramic Materials ISSMC-CNR (Former ISTEC-CNR), Faenza, Italy
| | - Costanza Ravagli
- Ce.Ri.Col, Colorobbia Consulting S.R.L, Sovigliana-Vinci, Firenze, Italy
| | - Giovanni Baldi
- Ce.Ri.Col, Colorobbia Consulting S.R.L, Sovigliana-Vinci, Firenze, Italy
| | - Simone Sprio
- National Research Council, Institute of Science, Technology and Sustainability for Ceramic Materials ISSMC-CNR (Former ISTEC-CNR), Faenza, Italy
| | - Anna Tampieri
- National Research Council, Institute of Science, Technology and Sustainability for Ceramic Materials ISSMC-CNR (Former ISTEC-CNR), Faenza, Italy
| | - Ivana Fenoglio
- Department of Chemistry, University of Turin, Turin, Italy
| | - Lang Tran
- Institute of Occupational Medicine, Edinburgh, Midlothian, United Kingdom
| | - Bengt Fadeel
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Marie Carriere
- CEA, CNRS, IRIG, SyMMES-CIBEST, Univ. Grenoble Alpes, Grenoble, France
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12
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Kieu Doan TN, Croyle MA. Physical characteristics and stability profile of recombinant plasmid DNA within a film matrix. Eur J Pharm Biopharm 2023; 190:270-283. [PMID: 37567395 DOI: 10.1016/j.ejpb.2023.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/14/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Plasmids are essential source material for production of biological drugs, vaccines and vectors for gene therapy. They are commonly formulated as frozen solutions. Considering the cost associated with maintenance of cold chain conditions during storage and transport, there is a significant need for alternative methods for stabilization of plasmids at ambient temperature. The objective of these studies was to identify a film-based formulation that preserved transfection efficiency of plasmids at 25 °C. A model plasmid, pAAVlacZ, was used for these studies. Transfection efficiency and agarose gel electrophoresis were utilized to assess bioactivity and changes in physical conformation of plasmid during storage. An amino acid, capable of sustaining a positive charge while supporting an alkaline environment within the film matrix, preserved transfection efficiency for 9 months at 25 °C. Addition of sugar and a plasticizer to the formulation preserved the plasmid in an amorphous state and improved handling properties of the film. The manner in which excipients were incorporated into bulk formulations and environmental humidity in which films were stored significantly impacted transfection efficiency of plasmid in the rehydrated solution. Taken together, these results suggest that plasmids can be stored for extended periods of time without refrigeration within a film matrix.
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Affiliation(s)
- Trang Nguyen Kieu Doan
- The University of Texas at Austin College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, TX 78712, United States
| | - Maria A Croyle
- The University of Texas at Austin College of Pharmacy, Division of Molecular Pharmaceutics and Drug Delivery, Austin, TX 78712, United States; John R. LaMontagne Center for Infectious Disease, The University of Texas at Austin, Austin, TX 78712, United States.
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13
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Safiarian M, Ugboya A, Khan I, Marichev KO, Grant KB. New Insights into the Phototoxicity of Anthracene-Based Chromophores: The Chloride Salt Effect†. Chem Res Toxicol 2023; 36:1002-1020. [PMID: 37347986 PMCID: PMC10354805 DOI: 10.1021/acs.chemrestox.2c00235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Indexed: 06/24/2023]
Abstract
Unraveling the causes underlying polycyclic aromatic hydrocarbon phototoxicity is an essential step in understanding the harmful effects of these compounds in nature. Toward this end, we have studied the DNA interactions and photochemistry of N1-(anthracen-9-ylmethyl)ethane-1,2-diaminium dichloride in the presence and absence of NaF, KF, NaCl, KCl, NaBr, KBr, NaI, and KI (350 nm hν, pH 7.0). Exposing pUC19 plasmid to UV light in solutions containing 400 mM KCl formed significantly more direct strand breaks in DNA compared to no-salt control reactions. In contrast, NaCl increased DNA damage moderately, while the sodium(I) and potassium(I) fluoride, bromide, and iodide salts generally inhibited cleavage (I- > Br- > F-). A halide anion-induced heavy-atom effect was indicated by monitoring anthracene photodegradation and by employing the hydroxyl radical (•OH) probe hydroxyphenyl fluorescein (HPF). These studies revealed that among no-salt controls and the eight halide salts, only NaCl and KCl enabled the anthracene to photosensitize the production of high levels of DNA-damaging reactive oxygen species (ROS). Pre-irradiation of N1-(anthracen-9-ylmethyl)ethane-1,2-diaminium dichloride at 350 nm increased the amounts of chloride salt-induced •OH detected by HPF in subsequent anthracene photoactivation experiments. Taking into consideration that •OH and other highly reactive ROS are extremely short-lived, this result suggests that the pre-irradiation step might lead to the formation of oxidized anthracene photoproducts that are exceedingly redox-active. The fluorometric probes HPF and Singlet Oxygen Sensor Green revealed that KCl concentrations ranging from 150 to 400 mM and from 100 to 400 mM, respectively, enhanced N1-(anthracen-9-ylmethyl)ethane-1,2-diaminium dichloride photosensitized •OH and singlet oxygen (1O2) production over no-salt controls. Considering the relatively high levels of Na+, K+, and Cl- ions that exist in the environment and in living organisms, our findings may be relevant to the phototoxic effects exhibited by anthracenes and other polycyclic hydrocarbons in vivo.
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Affiliation(s)
| | | | - Imran Khan
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Kostiantyn O. Marichev
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Kathryn B. Grant
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
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14
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Niu ZL, Zhou SH, Wu YY, Wu TT, Liu QS, Zhao QH, Ji H, Ren X, Xie MJ. Multifunctional O-phenanthroline silver(I) complexes for antitumor activity against colorectal adenocarcinoma cells and antimicrobial properties by multiple mechanisms. J Inorg Biochem 2023; 246:112293. [PMID: 37354605 DOI: 10.1016/j.jinorgbio.2023.112293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 06/10/2023] [Accepted: 06/13/2023] [Indexed: 06/26/2023]
Abstract
A series of O-phenanthroline silver(I) complexes were synthesized and characterized by infrared (IR) spectroscopy, mass spectrometry (MS), 1H nuclear magnetic resonance (NMR) spectroscopy and single-crystal X-ray crystallography. The cytotoxicity of the silver(I) complex (P-131) was evaluated in the cancer cell lines HCT-116, HeLa, and MDA-MB-231 and the normal cell line LO2 via MTT assays. The 50% inhibition concentration (IC50) of P-131 on HCT116 cell line is 0.86 ± 0.03 μM. It is far lower than the IC50 value of cisplatin (9.08 ± 1.10 μM), the IC50 value of normal cell LO2 (76.20 ± 0.48 μM) is much higher than that of cisplatin (3.99 ± 0.74 μM), indicating that its anticancer effect is stronger than that of cisplatin, and its biological safety is greater than that of cisplatin. Furthermore, anticancer mechanistic studies showed that P-131 inhibited cell proliferation by blocking DNA synthesis and acted temporally on the nucleus in dividing HCT-116 cells. Moreover, P-131 increased intracellular reactive oxygen species (ROS) levels in a dose-dependent manner. Notably, 10 mg/kg P-131 showed better antitumor effects than oxaliplatin in an HCT116 human colorectal xenograft mouse model without inducing toxicity. Moreover, the microdilution broth method was used to evaluate the antimicrobial properties of P-131 against Pseudomonas aeruginosa and Candida albicans. A biofilm eradication study was also performed using the crystal violet method and confocal laser scanning microscopy.
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Affiliation(s)
- Zong-Ling Niu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Si-Han Zhou
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Yuan-Yuan Wu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Tian-Tian Wu
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Qi-Shuai Liu
- Animal Research and Resource Center, School of Life Sciences, Yunnan University, Kunming 650091, Yunnan, China
| | - Qi-Hua Zhao
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China
| | - Hua Ji
- Oncology department, First People's Hospital of Yunnan Province, Kunming 650034, Yunnan, China
| | - Xiaoxia Ren
- Animal Research and Resource Center, School of Life Sciences, Yunnan University, Kunming 650091, Yunnan, China
| | - Ming-Jin Xie
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, Yunnan, China.
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15
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Kumar P, Tomar S, Kumar K, Kumar S. Transition metal complexes as self-activating chemical nucleases: proficient DNA cleavage without any exogenous redox agents. Dalton Trans 2023; 52:6961-6977. [PMID: 37128993 DOI: 10.1039/d3dt00368j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Chemical nucleases have found potential applications in the research fields of chemistry, biotechnology and medicine. A variety of metal complexes have been explored as good to outstanding therapeutic agents for DNA cleavage activity most likely via hydrolytic, oxidative or photoinduced cleavage pathways. However, most of these DNA cleaving agents lack their utility in in vivo applications due to their dependence on exogenous oxidants or reductants to achieve successful DNA damage. In view of addressing these issues, the development of metal complexes/organic molecules serving as self-activating chemical nucleases has received growing attention from researchers. In only the last decade, this field has dramatically expanded for the usage of chemical nucleases as therapeutic agents for DNA damage. The present study provides an overview of the opportunities and challenges in the design and development of self-activating chemical nucleases as improved DNA therapeutic candidates in the absence of an external redox agent. The reports on DNA nuclease activity via self-activation, especially with copper, zinc and iron complexes, and their mechanistic investigation have been discussed in this review article.
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Affiliation(s)
- Pramod Kumar
- Department of Chemistry, Mahamana Malviya College Khekra (Baghpat), C.C.S. University Meerut, India.
| | - Sunil Tomar
- Department of Zoology, Mahamana Malviya College Khekra (Baghpat), C.C.S. University Meerut, India
| | - Krishan Kumar
- Department of Chemistry, Motilal Nehru College, South Campus University of Delhi, New Delhi, India
| | - Sushil Kumar
- Department of Chemistry, School of Engineering, University of Petroleum and Energy Studies (UPES), Dehradun-248007, Uttarakhand, India.
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16
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Shadfar S, Parakh S, Jamali MS, Atkin JD. Redox dysregulation as a driver for DNA damage and its relationship to neurodegenerative diseases. Transl Neurodegener 2023; 12:18. [PMID: 37055865 PMCID: PMC10103468 DOI: 10.1186/s40035-023-00350-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 03/16/2023] [Indexed: 04/15/2023] Open
Abstract
Redox homeostasis refers to the balance between the production of reactive oxygen species (ROS) as well as reactive nitrogen species (RNS), and their elimination by antioxidants. It is linked to all important cellular activities and oxidative stress is a result of imbalance between pro-oxidants and antioxidant species. Oxidative stress perturbs many cellular activities, including processes that maintain the integrity of DNA. Nucleic acids are highly reactive and therefore particularly susceptible to damage. The DNA damage response detects and repairs these DNA lesions. Efficient DNA repair processes are therefore essential for maintaining cellular viability, but they decline considerably during aging. DNA damage and deficiencies in DNA repair are increasingly described in age-related neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis and Huntington's disease. Furthermore, oxidative stress has long been associated with these conditions. Moreover, both redox dysregulation and DNA damage increase significantly during aging, which is the biggest risk factor for neurodegenerative diseases. However, the links between redox dysfunction and DNA damage, and their joint contributions to pathophysiology in these conditions, are only just emerging. This review will discuss these associations and address the increasing evidence for redox dysregulation as an important and major source of DNA damage in neurodegenerative disorders. Understanding these connections may facilitate a better understanding of disease mechanisms, and ultimately lead to the design of better therapeutic strategies based on preventing both redox dysregulation and DNA damage.
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Affiliation(s)
- Sina Shadfar
- Centre for Motor Neuron Disease Research, Macquarie Medical School, Macquarie University, Sydney, NSW, 2109, Australia.
| | - Sonam Parakh
- Centre for Motor Neuron Disease Research, Macquarie Medical School, Macquarie University, Sydney, NSW, 2109, Australia
| | - Md Shafi Jamali
- Centre for Motor Neuron Disease Research, Macquarie Medical School, Macquarie University, Sydney, NSW, 2109, Australia
| | - Julie D Atkin
- Centre for Motor Neuron Disease Research, Macquarie Medical School, Macquarie University, Sydney, NSW, 2109, Australia.
- La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Melbourne, VIC, 3086, Australia.
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17
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Robert G, Wagner JR, Cadet J. Oxidatively generated tandem DNA modifications by pyrimidinyl and 2-deoxyribosyl peroxyl radicals. Free Radic Biol Med 2023; 196:22-36. [PMID: 36603668 DOI: 10.1016/j.freeradbiomed.2022.12.104] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/03/2023]
Abstract
Molecular oxygen sensitizes DNA to damage induced by ionizing radiation, Fenton-like reactions, and other free radical-mediated reactions. It rapidly converts carbon-centered radicals within DNA into peroxyl radicals, giving rise to a plethora of oxidized products consisting of nucleobase and 2-deoxyribose modifications, strand breaks and abasic sites. The mechanism of formation of single oxidation products has been extensively studied and reviewed. However, much evidence shows that reactive peroxyl radicals can propagate damage to vicinal components in DNA strands. These intramolecular reactions lead to the dual alteration of two adjacent nucleotides, designated as tandem or double lesions. Herein, current knowledge about the formation and biological implications of oxidatively generated DNA tandem lesions is reviewed. Thus far, most reported tandem lesions have been shown to arise from peroxyl radicals initially generated at pyrimidine bases, notably thymine, followed by reaction with 5'-flanking bases, especially guanine, although contiguous thymine lesions have also been characterized. Proper biomolecular processing is impaired by several tandem lesions making them refractory to base excision repair and potentially more mutagenic.
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Affiliation(s)
- Gabriel Robert
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, J1H 5N4, Canada
| | - J Richard Wagner
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, J1H 5N4, Canada.
| | - Jean Cadet
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, J1H 5N4, Canada.
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18
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Wang ZX, Hu L, Li XQ, Jia YL, Wang T, Wang W. Boron-enriched rice-like homologous carbon nanoclusters with a 51.5% photoluminescent quantum yield for highly sensitive determination of endogenous hydroxyl radicals in living cells. J Mater Chem B 2023; 11:1523-1532. [PMID: 36688312 DOI: 10.1039/d2tb02409h] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Exploring the ultrahigh quantum efficiency of a carbon-based probe via a green and simple technique, and utilisation of its sensing ability for highly bioactive molecule detection is still highly challenging. Herein, we prepared a novel boron-enriched rice-like homologous carbon nanoclusters (BRCNs) with an ultrahigh quantum efficiency of ∼51.5% by introduction of a conjugated structure attached to the CN bond and an electron-withdrawing boron active centre. Unexpectedly, the BRCNs obtained showed a stable dispersion of rice-like carbon nanograins, composed of small carbon dot assembled nanoclusters with an average diameter size of ∼30 nm, and containing boron units of ∼24.68 at%. What's exciting is that the BRCNs obtained exhibited an "on-off-on" three-state emission with the addition of an hydroxyl radical (OH˙) and its antioxidants. Thus, two distinctive fluorescent responses for OH˙ and antioxidants based on the BRCN probe had been developed, and the mechanism has been determined using TEM, XPS, FT-IR, FL, UV-vis spectrophotometry, UPS and fluorescent lifetimes. The OH˙, generated from the Fenton's reagent, preferentially attack the electron-deficient vacancy p orbit of the boron atom in the surface of the BRCNs, which results in the boron atom being easily substituted/attacked by OH˙, and leading to spontaneous aggregation induced quenching (AIQ) due to the existence of a strong intermolecular hydrogen bond between denatured BRCNs. Furthermore, the proposed method was also successfully applied to monitor endogenous OH˙ generation in HeLa cells by confocal imaging, which could be used for elucidating OH˙-induced oxidative damage to biological tissues and proteins.
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Affiliation(s)
- Zhong-Xia Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.
| | - Lei Hu
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.
| | - Xiao-Qiong Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yi-Lei Jia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Ting Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China.
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19
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Role of Histone Tails and Single Strand DNA Breaks in Nucleosomal Arrest of RNA Polymerase. Int J Mol Sci 2023; 24:ijms24032295. [PMID: 36768621 PMCID: PMC9917218 DOI: 10.3390/ijms24032295] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/13/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023] Open
Abstract
Transcription through nucleosomes by RNA polymerases (RNAP) is accompanied by formation of small intranucleosomal DNA loops (i-loops). The i-loops form more efficiently in the presence of single-strand breaks or gaps in a non-template DNA strand (NT-SSBs) and induce arrest of transcribing RNAP, thus allowing detection of NT-SSBs by the enzyme. Here we examined the role of histone tails and extranucleosomal NT-SSBs in i-loop formation and arrest of RNAP during transcription of promoter-proximal region of nucleosomal DNA. NT-SSBs present in linker DNA induce arrest of RNAP +1 to +15 bp in the nucleosome, suggesting formation of the i-loops; the arrest is more efficient in the presence of the histone tails. Consistently, DNA footprinting reveals formation of an i-loop after stalling RNAP at the position +2 and backtracking to position +1. The data suggest that histone tails and NT-SSBs present in linker DNA strongly facilitate formation of the i-loops during transcription through the promoter-proximal region of nucleosomal DNA.
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20
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Mechetin GV, Zharkov DO. DNA Damage Response and Repair in Boron Neutron Capture Therapy. Genes (Basel) 2023; 14:127. [PMID: 36672868 PMCID: PMC9859301 DOI: 10.3390/genes14010127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 01/03/2023] Open
Abstract
Boron neutron capture therapy (BNCT) is an approach to the radiotherapy of solid tumors that was first outlined in the 1930s but has attracted considerable attention recently with the advent of a new generation of neutron sources. In BNCT, tumor cells accumulate 10B atoms that react with epithermal neutrons, producing energetic α particles and 7Li atoms that damage the cell's genome. The damage inflicted by BNCT appears not to be easily repairable and is thus lethal for the cell; however, the molecular events underlying the action of BNCT remain largely unaddressed. In this review, the chemistry of DNA damage during BNCT is outlined, the major mechanisms of DNA break sensing and repair are summarized, and the specifics of the repair of BNCT-induced DNA lesions are discussed.
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Affiliation(s)
- Grigory V. Mechetin
- Department of Natural Sciences, Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
- Siberian Branch of the Russian Academy of Sciences Institute of Chemical Biology and Fundamental Medicine, 8 Lavrentieva Ave., 630090 Novosibirsk, Russia
| | - Dmitry O. Zharkov
- Department of Natural Sciences, Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russia
- Siberian Branch of the Russian Academy of Sciences Institute of Chemical Biology and Fundamental Medicine, 8 Lavrentieva Ave., 630090 Novosibirsk, Russia
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21
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Hussain A, Ray MK. DEAD box RNA helicases protect Antarctic Pseudomonas syringae Lz4W against oxidative stress. INFECTION, GENETICS AND EVOLUTION : JOURNAL OF MOLECULAR EPIDEMIOLOGY AND EVOLUTIONARY GENETICS IN INFECTIOUS DISEASES 2022; 106:105382. [PMID: 36336276 DOI: 10.1016/j.meegid.2022.105382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/28/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022]
Abstract
DEAD box RNA helicases are involved in important cellular processes like RNA metabolism (Processing and Degradation), ribosome biogenesis and translation. Besides being crucial to the formation of cold adapted degradosomes, RNA helicases have been implicated in structural rearrangement of RNA, implying a role in alleviation of RNA secondary structure stabilization at low temperature. This study depicts the results of experiments on protective role played by DEAD box RNA helicases against nucleic acid damaging agents. RNA helicase mutants ΔrhlE, ΔsrmB, ΔcsdA, ΔdbpA and ΔrhlB cells were exposed to various DNA damaging agents (UV, Paraquat, Mitomycin C, Hydroxyurea and Hydrogen peroxide) and assessed for sensitivity to them. Our results illustrate that ∆csdA displayed sensitivity to paraquat (that causes oxidative damage) and UV radiation induced DNA damage. On the other hand, ∆srmB displays sensitivity to hydroxyurea that causes damage to the replication forks (RFs) by inhibiting ribonucleotide reductase and depleting the dNTP pool of cells. However, all five RNA helicase mutants were resistant to H2O2 mediated oxidative stress and mitomycin C induced DNA cross-links.
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Affiliation(s)
- Ashaq Hussain
- Centre for Cellular and Molecular Biology, Hyderabad, India.
| | - Malay Kumar Ray
- Centre for Cellular and Molecular Biology, Hyderabad, India.
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22
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Guzman-Lopez EG, Reina M, Perez-Gonzalez A, Francisco-Marquez M, Hernandez-Ayala LF, Castañeda-Arriaga R, Galano A. CADMA-Chem: A Computational Protocol Based on Chemical Properties Aimed to Design Multifunctional Antioxidants. Int J Mol Sci 2022; 23:13246. [PMID: 36362034 PMCID: PMC9658414 DOI: 10.3390/ijms232113246] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/17/2022] [Accepted: 10/22/2022] [Indexed: 10/12/2023] Open
Abstract
A computational protocol aimed to design new antioxidants with versatile behavior is presented. It is called Computer-Assisted Design of Multifunctional Antioxidants and is based on chemical properties (CADMA-Chem). The desired multi-functionality consists of in different methods of antioxidant protection combined with neuroprotection, although the protocol can also be used to pursue other health benefits. The dM38 melatonin derivative is used as a study case to illustrate the protocol in detail. This was found to be a highly promising candidate for the treatment of neurodegeneration, in particular Parkinson's and Alzheimer's diseases. This also has the desired properties of an oral-drug, which is significantly better than Trolox for scavenging free radicals, and has chelates redox metals, prevents the ●OH production, via Fenton-like reactions, repairs oxidative damage in biomolecules (lipids, proteins, and DNA), and acts as a polygenic neuroprotector by inhibiting catechol-O-methyl transferase (COMT), acetylcholinesterase (AChE) and monoamine oxidase B (MAOB). To the best of our best knowledge, CADMA-Chem is currently the only protocol that simultaneously involves the analyses of drug-like behavior, toxicity, manufacturability, versatile antioxidant protection, and receptor-ligand binding affinities. It is expected to provide a starting point that helps to accelerate the discovery of oral drugs with the potential to prevent, or slow down, multifactorial human health disorders.
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Affiliation(s)
- Eduardo Gabriel Guzman-Lopez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | - Miguel Reina
- Departamento de Química Inorgánica y Nuclear, Facultad de Química, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Adriana Perez-Gonzalez
- CONACYT-Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | | | - Luis Felipe Hernandez-Ayala
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | - Romina Castañeda-Arriaga
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
| | - Annia Galano
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, Av. Ferrocarril San Rafael Atlixco 186, Col. Leyes de Reforma 1A Sección, Mexico City 09310, Mexico
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23
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Kumbhakar S, Gupta P, Giri B, Muley A, Karumban KS, Misra A, Maji S. Photolability of NO in ruthenium nitrosyls with pentadentate ligand induces exceptional cytotoxicity towards VCaP, 22Rv1 and A549 cancer cells under therapeutic condition. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Structure of an Intranucleosomal DNA Loop That Senses DNA Damage during Transcription. Cells 2022; 11:cells11172678. [PMID: 36078089 PMCID: PMC9454427 DOI: 10.3390/cells11172678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/22/2022] [Accepted: 08/24/2022] [Indexed: 11/16/2022] Open
Abstract
Transcription through chromatin by RNA polymerase II (Pol II) is accompanied by the formation of small intranucleosomal DNA loops containing the enzyme (i-loops) that are involved in survival of core histones on the DNA and arrest of Pol II during the transcription of damaged DNA. However, the structures of i-loops have not been determined. Here, the structures of the intermediates formed during transcription through a nucleosome containing intact or damaged DNA were studied using biochemical approaches and electron microscopy. After RNA polymerase reaches position +24 from the nucleosomal boundary, the enzyme can backtrack to position +20, where DNA behind the enzyme recoils on the surface of the histone octamer, forming an i-loop that locks Pol II in the arrested state. Since the i-loop is formed more efficiently in the presence of SSBs positioned behind the transcribing enzyme, the loop could play a role in the transcription-coupled repair of DNA damage hidden in the chromatin structure.
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25
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Rahaman SK, Mohammad M, Laskar RA, Siddiqui MR, Wabaidur SM, Islam MA, Alam SM, Ahmed F, Islam MM, Mir MH. A muconate bridged bipyridyl appended binuclear Cu(II) complex reveals dissimilar affinities to DNA and BSA protein. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Ren M, Greenberg MM, Zhou C. Participation of Histones in DNA Damage and Repair within Nucleosome Core Particles: Mechanism and Applications. Acc Chem Res 2022; 55:1059-1073. [PMID: 35271268 PMCID: PMC8983524 DOI: 10.1021/acs.accounts.2c00041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
DNA is damaged by various endogenous and exogenous sources, leading to a diverse group of reactive intermediates that yield a complex mixture of products. The initially formed products are often metastable and can react to yield lesions that are more biologically deleterious. Mechanistic studies are frequently carried out on free DNA as the substrate. The observations do not necessarily reflect the reaction environment inside human cells where genomic DNA is condensed as chromatin in the nucleus. Chromatin is made up of monomeric structural units called nucleosomes, which are comprised of DNA wrapped around an octameric core of histone proteins (two copies each of histones H2A, H2B, H3, and H4).This account presents a summary of our work in the past decade on the mechanistic studies of DNA damage and repair in reconstituted nucleosome core particles (NCPs). A series of metastable lesions and reactive intermediates, such as abasic sites (AP), N7-methyl-2'-deoxyguanosine (MdG), and 2'-deoxyadenosin-N6-yl radical (dA•), have been independently generated in a site-specific manner in bottom-up-synthesized NCPs. Detailed mechanistic studies on these NCPs revealed that histones actively participate in DNA damage and repair processes in diverse ways. For instance, nucleophilic residues in the flexible histone N-terminal tails, such as Lys and N-terminal α-amine, react with electrophilic DNA damage and reactive intermediates. In some cases, transient intermediates are produced, leading to the promotion or suppression of damage and repair processes. In other examples, reactions with histones yield reversible or stable DNA-protein cross-links (DPCs). Histones also utilize acidic and basic residues, such as histidine and aspartic acid, to catalyze DNA strand cleavage through general acid/base catalysis. Alternatively, a Tyr in histone plays a vital role in nucleosomal DNA damage and repair via radical transfer. Finally, the reactivity discovered during the mechanistic studies has facilitated the development of new reagents and methods with applications in biotechnology.This research has enriched our knowledge of the roles of histone proteins in DNA damage and repair and their contributions to epigenetics and may have significant biological implications. The residues in histone N-terminal tails that react with DNA lesions also play pivotal roles in regulating the structure and function of chromatin, indicating that there may be cross-talk between DNA damage and repair in eukaryotic cells and epigenetic regulation. Also, in view of the biased amino acid composition of histones, these results provide hints about how the proteins have evolved to minimize their deleterious effects but maximize beneficial ones for maintaining genome integrity. Finally, previously unreported DPCs and histone post-translational modifications have been discovered through this research. The effects of these newly identified lesions on the structure and function of chromatin and their fates inside cells remain to be elucidated.
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Affiliation(s)
- Mengtian Ren
- State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical Biology, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Marc M. Greenberg
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Chuanzheng Zhou
- State Key Laboratory of Elemento-Organic Chemistry and Department of Chemical Biology, College of Chemistry, Nankai University, Tianjin 300071, China
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Li S, Li F, Dong Y, Song N, Pan L, Yang D. Synthesis and Catalytic Property of Ribonucleoside-Derived Carbon Dots. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106269. [PMID: 35266630 DOI: 10.1002/smll.202106269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/26/2022] [Indexed: 06/14/2023]
Abstract
Exploring appropriate precursors has been proposed to be a promising strategy for the creation of artificial enzymes that are emerging as alternatives of natural enzymes. Herein, inspired by the catalytic activities of ribose nucleic acid, using ribonucleosides as precursors including adenosine, guanosine, cytidine, and uridine, respectively, four carbonic aggregates, namely, carbon dots (A-CDs, G-CDs, C-CDs, and U-CDs) to mimic artificial enzymes are synthesized. All the CDs show a planar graphene-like structure and thus can intercalatively bind with DNA double helix. Different from the other three CDs, the uridine-derived U-CDs exhibit unique catalytic property, which can mediate the topological transformation of DNA from supercoiled to nicked open-circular conformation. U-CDs can catalyze oxidation of O2 to generate singlet oxygen 1 O2 via a Haber-Weiss reaction, and consequently mediate oxidative cleavage of phosphate backbone in DNA and release the torsional energy stored in supercoiled DNA. Explorations reveal that the unique highly active oxygenated species, namely, quinone groups that are on the edge of U-CDs, play a key role in the catalytic production of 1 O2 . This work represents a new insight that using natural biomolecules in living systems as precursors can create new species beyond life.
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Affiliation(s)
- Shuai Li
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), Institute of Biomolecular and Biomedical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, P. R. China
- Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, P. R. China
| | - Feng Li
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), Institute of Biomolecular and Biomedical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, P. R. China
- Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, P. R. China
| | - Yuhang Dong
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), Institute of Biomolecular and Biomedical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, P. R. China
- Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, P. R. China
| | - Nachuan Song
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), Institute of Biomolecular and Biomedical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, P. R. China
- Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, P. R. China
| | - Li Pan
- Tianjin Key Laboratory of Composite & Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Dayong Yang
- Frontiers Science Center for Synthetic Biology, Key Laboratory of Systems Bioengineering (MOE), Institute of Biomolecular and Biomedical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, P. R. China
- Zhejiang Institute of Tianjin University, Ningbo, Zhejiang, 315201, P. R. China
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Ezzatpanah H, Gómez‐López VM, Koutchma T, Lavafpour F, Moerman F, Mohammadi M, Raheem D. New food safety challenges of viral contamination from a global perspective: Conventional, emerging, and novel methods of viral control. Compr Rev Food Sci Food Saf 2022; 21:904-941. [DOI: 10.1111/1541-4337.12909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 12/11/2022]
Affiliation(s)
- Hamid Ezzatpanah
- Department of Food Science and Technology, Science and Research Branch Islamic Azad University Tehran Iran
| | | | - Tatiana Koutchma
- Guelph Research and Development Center Agriculture and Agri‐Food Canada Guelph Ontario Canada
| | | | - Frank Moerman
- Department of Chemistry Catholic University of Leuven ‐ KU Leuven Leuven Belgium
| | | | - Dele Raheem
- Arctic Centre (NIEM) University of Lapland Rovaniemi Finland
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Fadaei F, Tortora M, Gessini A, Masciovecchio C, Catalini S, Vigna J, Mancini I, Mele A, Vacek J, Reha D, Minofar B, Rossi B. Structural specificity of groove binding mechanism between imidazolium-based ionic liquids and DNA revealed by synchrotron-UV Resonance Raman spectroscopy and molecular dynamics simulations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Montes AS, León EI, Martin A, Pérez-Martín I, Suárez E. Free‐Radical Epimerization of D‐ into L‐C‐(glycosyl)methanol Compounds Using 1,5‐Hydrogen Atom Transfer Reaction. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Adrián S. Montes
- IPNA: Instituto de Productos Naturales y Agrobiologia Síntesis de Productos Naturales Avda. Astrofisico Francisco Sanchez 3 38206 La Laguna SPAIN
| | - Elisa I León
- IPNA: Instituto de Productos Naturales y Agrobiologia Síntesis de Productos Naturales Avda. Astrofisico Francisco Sanchez 3 38206 La Laguna SPAIN
| | - Angeles Martin
- Instituto de Productos Naturales Y Agrobiolog�a, CSIC Sintesis de Productos Naturales Avda. Astrofisico Fco. Sanchez 3 38205 La Laguna SPAIN
| | - Inés Pérez-Martín
- IPNA: Instituto de Productos Naturales y Agrobiologia Síntesis de Productos Naturales Avda. Astrofisico Francisco Sanchez 3 38206 La Laguna SPAIN
| | - Ernesto Suárez
- IPNA: Instituto de Productos Naturales y Agrobiologia Síntesis de Productos Naturales Avda. Astrofisico Francisco Sanchez 3 38206 La Laguna SPAIN
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do Nascimento JS, de Sousa AP, Gondim ACS, Sousa EHS, Teixeira EH, do Nascimento Neto LG, Bezerra BP, Ayala AP, Batista AA, Vasconcelos IF, Oliveira FGS, Holanda AKM. A binuclear Fe( iii)/quinizarin complex as a structural model for anthracycline drugs binding to iron. NEW J CHEM 2022. [DOI: 10.1039/d1nj04087a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
Abstract
Quinizarin, an anthracyclin-like compound, was used to prepare a binuclear complex, [(Fe(cyclam))2Qz]Cl(PF6)3, which showed damage to DNA with glutathione. This mimic of anthracyclin drugs might explain undesired side effects of these compounds.
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Affiliation(s)
- Juliana S. do Nascimento
- Laboratório de Bioinorgânica, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, PO Box 12200, Campus do Pici s/n, 60440-900, Fortaleza, CE, Brazil
| | - Aurideia P. de Sousa
- Laboratório de Bioinorgânica, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, PO Box 12200, Campus do Pici s/n, 60440-900, Fortaleza, CE, Brazil
| | - Ana C. S. Gondim
- Laboratório de Bioinorgânica, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, PO Box 12200, Campus do Pici s/n, 60440-900, Fortaleza, CE, Brazil
| | - Eduardo H. S. Sousa
- Laboratório de Bioinorgânica, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, PO Box 12200, Campus do Pici s/n, 60440-900, Fortaleza, CE, Brazil
| | - Edson H. Teixeira
- Laboratório Integrado de Biomolêculas, Departamento de Patologia e Medicina Legal, Universidade Federal do Ceará, CEP 60430-270, Fortaleza, CE, Brazil
| | - Luiz Gonzaga do Nascimento Neto
- Departamento do Núcleo Comum, Instituto Federal de Educação, Ciência e Tecnologia do Ceará, Campus Limoeiro do Norte s/n, 62930-000, Limoeiro do Norte, CE, Brazil
| | | | | | - Alzir A. Batista
- Departamento de Química, Universidade Federal de São Carlos, PO Box 676, 13565-905 São Carlos, SP, Brazil
| | - Igor F. Vasconcelos
- Departamento de Engenharia Metalúrgica e de Materiais, Centro de Tecnologia, Universidade Federal do Ceará, Campus do Pici, Bloco 729, 60440-900, Fortaleza, CE, Brazil
| | - Francisco G. S. Oliveira
- Departamento de Engenharia Metalúrgica e de Materiais, Centro de Tecnologia, Universidade Federal do Ceará, Campus do Pici, Bloco 729, 60440-900, Fortaleza, CE, Brazil
| | - Alda K. M. Holanda
- Laboratório de Bioinorgânica, Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, PO Box 12200, Campus do Pici s/n, 60440-900, Fortaleza, CE, Brazil
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Maruoka H, Masumoto E. Spiro Heterocycles: Synthesis and Application of Spiro Pyrazol-3-one Derivatives. HETEROCYCLES 2022. [DOI: 10.3987/rev-21-975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Fleming AM, Burrows CJ. Chemistry of ROS-mediated oxidation to the guanine base in DNA and its biological consequences. Int J Radiat Biol 2022; 98:452-460. [PMID: 34747670 PMCID: PMC8881305 DOI: 10.1080/09553002.2021.2003464] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
PURPOSE One outcome of DNA damage from hydroxyl radical generated by ionizing radiation (IR) or by the Fenton reaction is oxidation of the nucleobases, especially guanine (G). While 8-oxo-7,8-dihydroguanine (OG) is a commonly studied oxidized lesion, several others are formed in high abundance, including 5-carboxamido-5-formamido-2-iminohydantoin (2Ih), a prevalent product in in vitro chemistry that is challenging to study from cellular sources. In this short review, we have a goal of explaining new insights into hydroxyl radical-induced oxidation chemistry of G in DNA and comparing it to endogenous DNA damage, as well as commenting on the biological outcomes of DNA base damage. CONCLUSIONS Pathways of oxidation of G are discussed and a comparison is made between IR (hydroxyl radical chemistry) and endogenous oxidative stress that largely forms carbonate radical anion as a reactive intermediate. These pathways overlap with the formation of OG and 2Ih, but other guanine-derived lesions are more pathway specific. The biological consequences of guanine oxidation include both mutagenesis and epigenetics; a new mechanism of gene regulation via the base excision repair pathway is described for OG, whereas the impact of IR in forming guanine modifications may be to confound this process in addition to introduction of mutagenic sites.
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Kacem H, Almeida A, Cherbuin N, Vozenin MC. Understanding the FLASH effect to unravel the potential of ultra-high dose rate irradiation. Int J Radiat Biol 2021; 98:506-516. [PMID: 34788193 DOI: 10.1080/09553002.2021.2004328] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A reemergence of research implementing radiation delivery at ultra-high dose rates (UHDRs) has triggered intense interest in the radiation sciences and has opened a new field of investigation in radiobiology. Much of the promise of UHDR irradiation involves the FLASH effect, an in vivo biological response observed to maintain anti-tumor efficacy without the normal tissue complications associated with standard dose rates. The FLASH effect has been validated primarily, using intermediate energy electron beams able to deliver high doses (>7 Gy) in a very short period of time (<200 ms), but has also been found with photon and proton beams. The clinical implications of this new area of research are highly significant, as FLASH radiotherapy (FLASH-RT) has the potential to enhance the therapeutic index, opening new possibilities for eradicating radio-resistant tumors without toxicity. As pioneers in this field, our group has developed a multidisciplinary research team focused on investigating the mechanisms and clinical translation of the FLASH effect. Here, we review the field of UHDR, from the physico-chemical to the biological mechanisms.
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Affiliation(s)
- Houda Kacem
- Department of Oncology, Laboratory of Radiation Oncology, Radiation Oncology Service, CHUV, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Aymeric Almeida
- Department of Oncology, Laboratory of Radiation Oncology, Radiation Oncology Service, CHUV, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Nicolas Cherbuin
- Department of Medical Radiology, Institute of Radiation Physics, CHUV, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Marie-Catherine Vozenin
- Department of Oncology, Laboratory of Radiation Oncology, Radiation Oncology Service, CHUV, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
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Kumbhakar S, Giri B, Muley A, Karumban KS, Maji S. Design, synthesis, structural, spectral, and redox properties and phenoxazinone synthase activity of tripodal pentacoordinate Mn(II) complexes with impressive turnover numbers. Dalton Trans 2021; 50:16601-16612. [PMID: 34747419 DOI: 10.1039/d1dt01925b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catechol oxidase (CO) and phenoxazinone synthase (PHS) are two enzymes of immense significance due to their capability to oxidize catechols and o-aminophenols to o-quinones and phenoxazinones, respectively. In this connection two mononuclear manganese complexes with the molecular framework [MnII(Ln)Cl]Cl {L1: tris((1H-benzo[d]imidazol-2-yl)methyl)amine; n = 1 and L2: tris(N-methylbenzimidazol-2-ylmethyl)amine; n = 2} have been designed to be potential catalysts for OAPH (o-aminophenol) oxidation. Both the ligands and their corresponding metal complexes have been successfully synthesized and thoroughly characterized by different spectroscopic and analytical techniques such as FT-IR, 1H NMR, UV-vis spectroscopy, EPR spectroscopy and ESI mass spectroscopy. The molecular structures of [MnII(L1)Cl]Cl (1) and [MnII(L2)Cl]Cl (2) have been revealed by a single-crystal X-ray diffraction study. The spectral properties and redox behaviour of both the complexes were examined. Under ambient conditions, 1 and 2 show excellent phenoxazinone synthase activity as both are very susceptible to oxidize o-aminophenol to phenoxazinone. The kinetic parameters for both complexes have been determined by analyzing the experimental spectroscopic data. The turnover numbers (kcat value) of these two complexes are extremely high, 440 h-1 and 234 h-1 for 1 and 2, respectively. The present report offers a thorough overview of information involving the role of the metal ions and their extent of phenoxazinone synthase mimicking activity. The oxidation of o-aminophenol to 2-amino-3H-phenoxazine-3-one (APX) by catalytic oxidation of oxygen (O2) by the reaction with transition metal complexes has been an important study for the last few decades. The current study evidently showed better performance of our synthesized Mn(II) complexes than all the predecessors. The plausible mechanism has been reiterated based on the experimental data via ESI-MS spectra and considering the concepts from the previously reported mechanisms involved in the formation of hydrogen peroxide (H2O2) as an intermediate substrate is fairly indicating the involvement of molecular oxygen in the catalytic cycle.
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Affiliation(s)
- Sadananda Kumbhakar
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Bishnubasu Giri
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Arabinda Muley
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Kalai Selvan Karumban
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Somnath Maji
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
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León EI, Martín Á, Montes AS, Pérez-Martín I, Del Sol Rodríguez M, Suárez E. 1,5-Hydrogen Atom Transfer/Surzur-Tanner Rearrangement: A Radical Cascade Approach for the Synthesis of 1,6-Dioxaspiro[4.5]decane and 6,8-Dioxabicyclo[3.2.1]octane Scaffolds in Carbohydrate Systems. J Org Chem 2021; 86:14508-14552. [PMID: 34554734 PMCID: PMC8576821 DOI: 10.1021/acs.joc.1c01376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
The 1,5-HAT–1,2-(ester)alkyl
radical migration (Surzur–Tanner
rearrangement) radical/polar sequence triggered by alkoxyl radicals
has been studied on a series of C-glycosyl substrates
with 3-C-(α,β-d,l-glycopyranosyl)1-propanol
and C-(α-d,l-glycopyranosyl)methanol
structures prepared from chiral pool d- and l-sugar.
The use of acetoxy and diphenoxyphosphatoxy as leaving groups provides
an efficient construction of 10-deoxy-1,6-dioxaspiro[4.5]decane and
4-deoxy-6,8-dioxabicyclo[3.2.1]octane frameworks. The alkoxyl radicals
were generated by the reaction of the corresponding N-alkoxyphthalimides with group 14 hydrides [n-Bu3SnH(D) and (TMS)3SiH], and in comparative terms,
the reaction was also initiated by visible light photocatalysis using
the Hantzsch ester/fac-Ir(ppy)3 procedure.
Special attention was devoted to the influence of the relative stereochemistry
of the centers involved in the radical sequence on the reaction outcome.
The addition of BF3•Et2O as a catalyst
to the radical sequence resulted in a significant increase in the
yields of the desired bicyclic ketals.
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Affiliation(s)
- Elisa I León
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Ángeles Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Adrián S Montes
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain.,Doctoral and Postgraduate School, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez s/n, 38200 La Laguna, Tenerife, Spain
| | - Inés Pérez-Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - María Del Sol Rodríguez
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Ernesto Suárez
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
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Gabriel P, Maranha FG, Nordlander E, Neves A, Terenzi H. A heterotrinuclear bioinspired coordination complex capable of binding to DNA and emulation of nuclease activity. J Inorg Biochem 2021; 226:111631. [PMID: 34717251 DOI: 10.1016/j.jinorgbio.2021.111631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 10/05/2021] [Accepted: 10/12/2021] [Indexed: 10/20/2022]
Abstract
The investigation of compounds capable of strongly and selectively interacting with DNA comprises a field of research in constant development. In this work, we demonstrate that a trinuclear coordination complex based on a dinuclear Fe(III)Zn(II) core designed for biomimicry of the hydrolytic enzyme kidney bean purple acid phosphatase, containing an additional pendant arm coordinating a Pd(II) ion, has the ability to interact with DNA and to promote its hydrolytic cleavage. These results were found through analysis of plasmid DNA interaction and cleavage by the trinuclear complex 1 and its derivatives 2 and 3, in addition to the analysis of alteration in the DNA structure in the presence of the complexes through circular dichroism and DNA footprinting techniques. The suggested covalent interaction of the palladium-containing complex with DNA was analysed using an electrophoretic mobility assay, circular dichroism, high resolution gel separation techniques and kinetic analysis. This is a new and promising metal complex targeted to nucleic acids and acting in two separate ways: strong DNA interaction and hydrolytic cleavage.
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Affiliation(s)
- Philipe Gabriel
- Centro de Biologia Molecular Estrutural, Departamento de Bioquímica, Universidade Federal de Santa Catarina, Florianópolis 88040-970, Brazil
| | - Filipy Gobbo Maranha
- Laboratório de Bioinorgânica e Cristalografia, Departamernto de Química, Universidade Federal de Santa Catarina, Florianópolis 88040-970, Brazil
| | - Ebbe Nordlander
- Chemical Physics, Department of Chemistry, Lund University, Lund, Box 124, SE-221 00, Sweden
| | - Ademir Neves
- Laboratório de Bioinorgânica e Cristalografia, Departamernto de Química, Universidade Federal de Santa Catarina, Florianópolis 88040-970, Brazil
| | - Hernán Terenzi
- Centro de Biologia Molecular Estrutural, Departamento de Bioquímica, Universidade Federal de Santa Catarina, Florianópolis 88040-970, Brazil.
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Ebenezer B, Nagashri K. Synthesis and in vitro biochemical properties, DNA binding and DNA cleavage ability of copper complexes of hydroxyflavone derivatives of novel organosulfur compounds as therapeutic agent. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2021; 40:1159-1197. [PMID: 34612797 DOI: 10.1080/15257770.2021.1985517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Novel and synthetically essential flavonoids compounds containing the organosulfur moiety from Schiff bases, as well as their copper complexes, were synthesized from chrysin and 2-(phenylthio)aniline. These complexes were characterized using elemental analysis, mass spectrometry, electronic absorption spectroscopy, IR, 1H, and 13C NMR spectroscopy techniques. All the Cu(II) complexes exhibit square planar geometry. The in vitro antimicrobial activities of the investigated compounds were tested against the bacterial species, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Staphylococcus epidermidis, and Klebsiella pneumoniae and fungal species, Aspergillus niger, Fusarium solani, Culvularia lunata, Rhizoctonia bataicola, and Candida albicans by serial dilution method. The DNA binding and DNA cleavage properties of copper complexes were studied. Free radical scavenging, superoxide dismutase, glutathione peroxidase, and antioxidant activities of the copper complexes have also been studied. In addition, using the egg albumin process, the in vitro anti-inflammatory efficacy of metal chelates was examined. Anti-tuberculosis and α-glucosidase inhibition activity were carried out from the prepared metal complexes. The flavonoid compounds containing the organosulfur moiety of Cu(II) complexes (1-8) exhibited better therapeutic agent.
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Affiliation(s)
- B Ebenezer
- Department of Pharmaceutical Chemistry, Manonmaniam Sundaranar University, Tirunelveli, Tamil Nadu, India
| | - K Nagashri
- Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli, Tamil Nadu, India
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de la Lande A, Denisov S, Mostafavi M. The mystery of sub-picosecond charge transfer following irradiation of hydrated uridine monophosphate. Phys Chem Chem Phys 2021; 23:21148-21162. [PMID: 34528029 DOI: 10.1039/d0cp06482c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The early mechanisms by which ionizing rays damage biological structures by so-called direct effects are largely elusive. In a recent picosecond pulse radiolysis study of concentrated uridine monophosphate solutions [J. Ma, S. A. Denisov, J.-L. Marignier, P. Pernot, A. Adhikary, S. Seki and M. Mostafavi, J. Phys. Chem. Lett., 2018, 9, 5105], unexpected results were found regarding the oxidation of the nucleobase. The signature of the oxidized nucleobase could not be detected 5 ps after the electron pulse, but only the oxidized phosphate, raising intriguing questions about the identity of charge-transfer mechanisms that could explain the absence of U+. We address here this question by means of advanced first-principles atomistic simulations of solvated uridine monophosphate, combining Density Functional Theory (DFT) with polarizable embedding schemes. We contrast three very distinct mechanisms of charge transfer covering the atto-, femto- and pico-second timescales. We first investigate the ionization mechanism and subsequent hole/charge migrations on a timescale of attoseconds to a few femtoseconds under the frozen nuclei approximation. We then consider a nuclear-driven phosphate-to-oxidized-nucleobase electron transfer, showing that it is an uncompetitive reaction channel on the sub-picosecond timescale, despite its high exothermicity and significant electronic coupling. Finally, we show that non-adiabatic charge transfer is enabled by femtosecond nuclear relaxation after ionization. We show that electronic decoherence and the electronic coupling strength are the key parameters that determine the hopping probabilities. Our results provide important insight into the interplay between electronics and nuclear motions in the early stages of the multiscale responses of biological matter subjected to ionizing radiation.
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Affiliation(s)
- Aurélien de la Lande
- Institut de Chimie Physique, CNRS, Université Paris Saclay (UMR 8000), 15 Avenue Jean Perrin, 91405, France.
| | - Sergey Denisov
- Institut de Chimie Physique, CNRS, Université Paris Saclay (UMR 8000), 15 Avenue Jean Perrin, 91405, France.
| | - Mehran Mostafavi
- Institut de Chimie Physique, CNRS, Université Paris Saclay (UMR 8000), 15 Avenue Jean Perrin, 91405, France.
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Lechner VM, Nappi M, Deneny PJ, Folliet S, Chu JCK, Gaunt MJ. Visible-Light-Mediated Modification and Manipulation of Biomacromolecules. Chem Rev 2021; 122:1752-1829. [PMID: 34546740 DOI: 10.1021/acs.chemrev.1c00357] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chemically modified biomacromolecules-i.e., proteins, nucleic acids, glycans, and lipids-have become crucial tools in chemical biology. They are extensively used not only to elucidate cellular processes but also in industrial applications, particularly in the context of biopharmaceuticals. In order to enable maximum scope for optimization, it is pivotal to have a diverse array of biomacromolecule modification methods at one's disposal. Chemistry has driven many significant advances in this area, and especially recently, numerous novel visible-light-induced photochemical approaches have emerged. In these reactions, light serves as an external source of energy, enabling access to highly reactive intermediates under exceedingly mild conditions and with exquisite spatiotemporal control. While UV-induced transformations on biomacromolecules date back decades, visible light has the unmistakable advantage of being considerably more biocompatible, and a spectrum of visible-light-driven methods is now available, chiefly for proteins and nucleic acids. This review will discuss modifications of native functional groups (FGs), including functionalization, labeling, and cross-linking techniques as well as the utility of oxidative degradation mediated by photochemically generated reactive oxygen species. Furthermore, transformations at non-native, bioorthogonal FGs on biomacromolecules will be addressed, including photoclick chemistry and DNA-encoded library synthesis as well as methods that allow manipulation of the activity of a biomacromolecule.
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Affiliation(s)
- Vivian M Lechner
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Manuel Nappi
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Patrick J Deneny
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Sarah Folliet
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - John C K Chu
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew J Gaunt
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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Kim DV, Kulishova LM, Torgasheva NA, Melentyev VS, Dianov GL, Medvedev SP, Zakian SM, Zharkov DO. Mild phenotype of knockouts of the major apurinic/apyrimidinic endonuclease APEX1 in a non-cancer human cell line. PLoS One 2021; 16:e0257473. [PMID: 34529719 PMCID: PMC8445474 DOI: 10.1371/journal.pone.0257473] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/01/2021] [Indexed: 12/26/2022] Open
Abstract
The major human apurinic/apyrimidinic (AP) site endonuclease, APEX1, is a central player in the base excision DNA repair (BER) pathway and has a role in the regulation of DNA binding by transcription factors. In vertebrates, APEX1 knockouts are embryonic lethal, and only a handful of knockout cell lines are known. To facilitate studies of multiple functions of this protein in human cells, we have used the CRISPR/Cas9 system to knock out the APEX1 gene in a widely used non-cancer hypotriploid HEK 293FT cell line. Two stable knockout lines were obtained, one carrying two single-base deletion alleles and one single-base insertion allele in exon 3, another homozygous in the single-base insertion allele. Both mutations cause a frameshift that leads to premature translation termination before the start of the protein's catalytic domain. Both cell lines totally lacked the APEX1 protein and AP site-cleaving activity, and showed significantly lower levels of the APEX1 transcript. The APEX1-null cells were unable to support BER on uracil- or AP site-containing substrates. Phenotypically, they showed a moderately increased sensitivity to methyl methanesulfonate (MMS; ~2-fold lower EC50 compared with wild-type cells), and their background level of natural AP sites detected by the aldehyde-reactive probe was elevated ~1.5-2-fold. However, the knockout lines retained a nearly wild-type sensitivity to oxidizing agents hydrogen peroxide and potassium bromate. Interestingly, despite the increased MMS cytotoxicity, we observed no additional increase in AP sites in knockout cells upon MMS treatment, which could indicate their conversion into more toxic products in the absence of repair. Overall, the relatively mild cell phenotype in the absence of APEX1-dependent BER suggests that mammalian cells possess mechanisms of tolerance or alternative repair of AP sites. The knockout derivatives of the extensively characterized HEK 293FT cell line may provide a valuable tool for studies of APEX1 in DNA repair and beyond.
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Affiliation(s)
- Daria V. Kim
- Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
- SB RAS Institute of Chemical Biology and Fundamental Medicine, Novosibirsk, Russia
| | - Liliya M. Kulishova
- SB RAS Institute of Chemical Biology and Fundamental Medicine, Novosibirsk, Russia
| | | | - Vasily S. Melentyev
- Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
- SB RAS Institute of Cytology and Genetics, Novosibirsk, Russia
| | - Grigory L. Dianov
- Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
- SB RAS Institute of Cytology and Genetics, Novosibirsk, Russia
- Department of Oncology, MRC Oxford Institute for Radiation Oncology, University of Oxford, Oxford, United Kingdom
| | | | - Suren M. Zakian
- SB RAS Institute of Cytology and Genetics, Novosibirsk, Russia
| | - Dmitry O. Zharkov
- Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia
- SB RAS Institute of Chemical Biology and Fundamental Medicine, Novosibirsk, Russia
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Evolutionary Origins of DNA Repair Pathways: Role of Oxygen Catastrophe in the Emergence of DNA Glycosylases. Cells 2021; 10:cells10071591. [PMID: 34202661 PMCID: PMC8307549 DOI: 10.3390/cells10071591] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 11/23/2022] Open
Abstract
It was proposed that the last universal common ancestor (LUCA) evolved under high temperatures in an oxygen-free environment, similar to those found in deep-sea vents and on volcanic slopes. Therefore, spontaneous DNA decay, such as base loss and cytosine deamination, was the major factor affecting LUCA’s genome integrity. Cosmic radiation due to Earth’s weak magnetic field and alkylating metabolic radicals added to these threats. Here, we propose that ancient forms of life had only two distinct repair mechanisms: versatile apurinic/apyrimidinic (AP) endonucleases to cope with both AP sites and deaminated residues, and enzymes catalyzing the direct reversal of UV and alkylation damage. The absence of uracil–DNA N-glycosylases in some Archaea, together with the presence of an AP endonuclease, which can cleave uracil-containing DNA, suggests that the AP endonuclease-initiated nucleotide incision repair (NIR) pathway evolved independently from DNA glycosylase-mediated base excision repair. NIR may be a relic that appeared in an early thermophilic ancestor to counteract spontaneous DNA damage. We hypothesize that a rise in the oxygen level in the Earth’s atmosphere ~2 Ga triggered the narrow specialization of AP endonucleases and DNA glycosylases to cope efficiently with a widened array of oxidative base damage and complex DNA lesions.
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Fleming AM, Burrows CJ. Iron Fenton oxidation of 2'-deoxyguanosine in physiological bicarbonate buffer yields products consistent with the reactive oxygen species carbonate radical anion not the hydroxyl radical. Chem Commun (Camb) 2021; 56:9779-9782. [PMID: 32716425 DOI: 10.1039/d0cc04138f] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Product analysis from the iron Fenton oxidation of 2'-deoxyguanosine found reactions in bicarbonate buffer yield 8-oxo-2'-deoxyguanosine and spiroiminodihyantoin consistent with CO3˙-. Reactions in phosphate buffer furnished high yields of sugar oxidation products consistent with HO˙. These observations change the view of DNA oxidation products from the iron-Fenton reaction.
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Affiliation(s)
- Aaron M Fleming
- Dept. of Chemistry, University of Utah, Salt Lake City, UT 84112-0850, USA.
| | - Cynthia J Burrows
- Dept. of Chemistry, University of Utah, Salt Lake City, UT 84112-0850, USA.
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Chen YD, Duan X, Zhou X, Wang R, Wang S, Ren NQ, Ho SH. Advanced oxidation processes for water disinfection: Features, mechanisms and prospects. CHEMICAL ENGINEERING JOURNAL 2021. [PMID: 0 DOI: 10.1016/j.cej.2020.128207] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
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Pourshahian S. THERAPEUTIC OLIGONUCLEOTIDES, IMPURITIES, DEGRADANTS, AND THEIR CHARACTERIZATION BY MASS SPECTROMETRY. MASS SPECTROMETRY REVIEWS 2021; 40:75-109. [PMID: 31840864 DOI: 10.1002/mas.21615] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Oligonucleotides are an emerging class of drugs that are manufactured by solid-phase synthesis. As a chemical class, they have unique product-related impurities and degradants, characterization of which is an essential step in drug development. The synthesis cycle, impurities produced during the synthesis and degradation products are presented and discussed. The use of liquid chromatography combined with mass spectrometry for characterization and quantification of product-related impurities and degradants is reviewed. In addition, sequence determination of oligonucleotides by gas-phase fragmentation and indirect mass spectrometric methods is discussed. © 2019 John Wiley & Sons Ltd. Mass Spec Rev.
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Affiliation(s)
- Soheil Pourshahian
- Janssen Pharmaceutical Companies of Johnson & Johnson, South San Francisco, CA, 94080
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46
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Arthur-Baidoo E, Falkiewicz K, Chomicz-Mańka L, Czaja A, Demkowicz S, Biernacki K, Kozak W, Rak J, Denifl S. Electron-Induced Decomposition of Uracil-5-yl O-( N, N-dimethylsulfamate): Role of Methylation in Molecular Stability. Int J Mol Sci 2021; 22:2344. [PMID: 33652878 PMCID: PMC7956691 DOI: 10.3390/ijms22052344] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/18/2021] [Accepted: 02/21/2021] [Indexed: 01/29/2023] Open
Abstract
The incorporation of modified uracil derivatives into DNA leads to the formation of radical species that induce DNA damage. Molecules of this class have been suggested as radiosensitizers and are still under investigation. In this study, we present the results of dissociative electron attachment to uracil-5-yl O-(N,N-dimethylsulfamate) in the gas phase. We observed the formation of 10 fragment anions in the studied range of electron energies from 0-12 eV. Most of the anions were predominantly formed at the electron energy of about 0 eV. The fragmentation paths were analogous to those observed in uracil-5-yl O-sulfamate, i.e., the methylation did not affect certain bond cleavages (O-C, S-O and S-N), although relative intensities differed. The experimental results are supported by quantum chemical calculations performed at the M06-2X/aug-cc-pVTZ level of theory. Furthermore, a resonance stabilization method was used to theoretically predict the resonance positions of the fragment anions O- and CH3-.
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Affiliation(s)
- Eugene Arthur-Baidoo
- Institute for Ion Physics and Applied Physics, University of Innsbruck, Technikerstrasse 25/3, 6020 Innsbruck, Austria;
- Center for Biomolecular Sciences Innsbruck, University of Innsbruck, Technikerstrasse 25/3, 6020 Innsbruck, Austria
| | - Karina Falkiewicz
- Department of Physical Chemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (K.F.); (L.C.-M.); (A.C.); (W.K.)
| | - Lidia Chomicz-Mańka
- Department of Physical Chemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (K.F.); (L.C.-M.); (A.C.); (W.K.)
| | - Anna Czaja
- Department of Physical Chemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (K.F.); (L.C.-M.); (A.C.); (W.K.)
| | - Sebastian Demkowicz
- Department of Organic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (S.D.); (K.B.)
| | - Karol Biernacki
- Department of Organic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland; (S.D.); (K.B.)
| | - Witold Kozak
- Department of Physical Chemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (K.F.); (L.C.-M.); (A.C.); (W.K.)
| | - Janusz Rak
- Department of Physical Chemistry, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland; (K.F.); (L.C.-M.); (A.C.); (W.K.)
| | - Stephan Denifl
- Institute for Ion Physics and Applied Physics, University of Innsbruck, Technikerstrasse 25/3, 6020 Innsbruck, Austria;
- Center for Biomolecular Sciences Innsbruck, University of Innsbruck, Technikerstrasse 25/3, 6020 Innsbruck, Austria
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Bell M, Kumar A, Sevilla MD. Electron-Induced Repair of 2'-Deoxyribose Sugar Radicals in DNA: A Density Functional Theory (DFT) Study. Int J Mol Sci 2021; 22:ijms22041736. [PMID: 33572317 PMCID: PMC7916153 DOI: 10.3390/ijms22041736] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/01/2021] [Accepted: 02/05/2021] [Indexed: 12/19/2022] Open
Abstract
In this work, we used ωB97XD density functional and 6-31++G** basis set to study the structure, electron affinity, populations via Boltzmann distribution, and one-electron reduction potentials (E°) of 2′-deoxyribose sugar radicals in aqueous phase by considering 2′-deoxyguanosine and 2′-deoxythymidine as a model of DNA. The calculation predicted the relative stability of sugar radicals in the order C4′• > C1′• > C5′• > C3′• > C2′•. The Boltzmann distribution populations based on the relative stability of the sugar radicals were not those found for ionizing radiation or OH-radical attack and are good evidence the kinetic mechanisms of the processes drive the products formed. The adiabatic electron affinities of these sugar radicals were in the range 2.6–3.3 eV which is higher than the canonical DNA bases. The sugar radicals reduction potentials (E°) without protonation (−1.8 to −1.2 V) were also significantly higher than the bases. Thus the sugar radicals will be far more readily reduced by solvated electrons than the DNA bases. In the aqueous phase, these one-electron reduced sugar radicals (anions) are protonated from solvent and thus are efficiently repaired via the “electron-induced proton transfer mechanism”. The calculation shows that, in comparison to efficient repair of sugar radicals by the electron-induced proton transfer mechanism, the repair of the cyclopurine lesion, 5′,8-cyclo-2′-dG, would involve a substantial barrier.
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Chatgilialoglu C, Ferreri C, Krokidis MG, Masi A, Terzidis MA. On the relevance of hydroxyl radical to purine DNA damage. Free Radic Res 2021; 55:384-404. [PMID: 33494618 DOI: 10.1080/10715762.2021.1876855] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Hydroxyl radical (HO•) is the most reactive toward DNA among the reactive oxygen species (ROS) generated in aerobic organisms by cellular metabolisms. HO• is generated also by exogenous sources such as ionizing radiations. In this review we focus on the purine DNA damage by HO• radicals. In particular, emphasis is given on mechanistic aspects for the various lesion formation and their interconnections. Although the majority of the purine DNA lesions like 8-oxo-purine (8-oxo-Pu) are generated by various ROS (including HO•), the formation of 5',8-cyclopurine (cPu) lesions in vitro and in vivo relies exclusively on the HO• attack. Methodologies generally utilized for the purine lesions quantification in biological samples are reported and critically discussed. Recent results on cPu and 8-oxo-Pu lesions quantification in various types of biological specimens associated with the cellular repair efficiency as well as with distinct pathologies are presented, providing some insights on their biological significance.
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Affiliation(s)
- Chryssostomos Chatgilialoglu
- ISOF, Consiglio Nazionale delle Ricerche, Bologna, Italy.,Center for Advanced Technologies, Adam Mickiewicz University, Poznan, Poland
| | - Carla Ferreri
- ISOF, Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Marios G Krokidis
- Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", Athens, Greece
| | - Annalisa Masi
- ISOF, Consiglio Nazionale delle Ricerche, Bologna, Italy.,Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Monterotondo, Italy
| | - Michael A Terzidis
- Department of Nutritional Sciences and Dietetics, International Hellenic University, Thessaloniki, Greece
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Maiti BK, Govil N, Kundu T, Moura JJ. Designed Metal-ATCUN Derivatives: Redox- and Non-redox-Based Applications Relevant for Chemistry, Biology, and Medicine. iScience 2020; 23:101792. [PMID: 33294799 PMCID: PMC7701195 DOI: 10.1016/j.isci.2020.101792] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
The designed "ATCUN" motif (amino-terminal copper and nickel binding site) is a replica of naturally occurring ATCUN site found in many proteins/peptides, and an attractive platform for multiple applications, which include nucleases, proteases, spectroscopic probes, imaging, and small molecule activation. ATCUN motifs are engineered at periphery by conjugation to recombinant proteins, peptides, fluorophores, or recognition domains through chemically or genetically, fulfilling the needs of various biological relevance and a wide range of practical usages. This chemistry has witnessed significant growth over the last few decades and several interesting ATCUN derivatives have been described. The redox role of the ATCUN moieties is also an important aspect to be considered. The redox potential of designed M-ATCUN derivatives is modulated by judicious choice of amino acid (including stereochemistry, charge, and position) that ultimately leads to the catalytic efficiency. In this context, a wide range of M-ATCUN derivatives have been designed purposefully for various redox- and non-redox-based applications, including spectroscopic probes, target-based catalytic metallodrugs, inhibition of amyloid-β toxicity, and telomere shortening, enzyme inactivation, biomolecules stitching or modification, next-generation antibiotic, and small molecule activation.
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Affiliation(s)
- Biplab K. Maiti
- National Institute of Technology Sikkim, Ravangla Campus, Barfung Block, Ravangla Sub Division, South Sikkim 737139, India
| | - Nidhi Govil
- National Institute of Technology Sikkim, Ravangla Campus, Barfung Block, Ravangla Sub Division, South Sikkim 737139, India
| | - Taraknath Kundu
- National Institute of Technology Sikkim, Ravangla Campus, Barfung Block, Ravangla Sub Division, South Sikkim 737139, India
| | - José J.G. Moura
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
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50
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Akamatsu K, Shikazono N, Saito T. Fluorescence anisotropy study of radiation-induced DNA damage clustering based on FRET. Anal Bioanal Chem 2020; 413:1185-1192. [PMID: 33245399 DOI: 10.1007/s00216-020-03082-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/01/2020] [Accepted: 11/18/2020] [Indexed: 12/13/2022]
Abstract
A clustered DNA damage site (cluster), in which two or more lesions exist within a few helical turns, is believed to be a key factor determining the fate of a living cell exposed to a DNA damaging agent such as ionizing radiation. However, the structural details of a cluster such as the number of included lesions and their proximity are unknown. Herein, we develop a method to characterize a cluster by fluorescence anisotropy measurements based on Förster resonance energy transfer (homo-FRET). Plasmid DNA (pUC19) was irradiated with 2.0 and 0.52 MeV/u 4He2+, or 0.37 MeV/u 12C5+ ion beams (linear energy transfer: ~ 70, ~ 150, ~ 760 keV/μm, respectively) and 60Co γ-rays as a standard (~ 0.2 keV/μm) in the solid state. The irradiated DNA was labeled with an aminooxyl fluorophore (Alexa Fluor 488) to the aldehyde/ketone moieties such as apurinic/apyrimidinic sites. Homo-FRET analyses provided the apparent base separation values between lesions in a cluster produced by each ion beam track as 21.1, 19.4, and 18.7 base pairs. The production frequency of a cluster increases with increasing linear energy transfer of radiation. Our results demonstrate that homo-FRET analysis has the potential to discover the qualitative and the quantitative differences of the clusters produced not only by a variety of ionizing radiation but also by other DNA damaging agents.
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Affiliation(s)
- Ken Akamatsu
- DNA Damage Chemistry Research Group, Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, 619-0215, Kyoto, Japan.
| | - Naoya Shikazono
- DNA Damage Chemistry Research Group, Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, 619-0215, Kyoto, Japan
| | - Takeshi Saito
- Division of Radiation Life Science, Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori, Sennan, Osaka, 590-0494, Japan
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