1
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Cadet J, Angelov D, Di Mascio P, Wagner JR. Contribution of oxidation reactions to photo-induced damage to cellular DNA. Photochem Photobiol 2024. [PMID: 38970297 DOI: 10.1111/php.13990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/14/2024] [Accepted: 06/15/2024] [Indexed: 07/08/2024]
Abstract
This review article is aimed at providing updated information on the contribution of immediate and delayed oxidative reactions to the photo-induced damage to cellular DNA/skin under exposure to UVB/UVA radiations and visible light. Low-intensity UVC and UVB radiations that operate predominantly through direct excitation of the nucleobases are very poor oxidizing agents giving rise to very low amounts of 8-oxo-7,8-dihydroguanine and DNA strand breaks with respect to the overwhelming bipyrimidine dimeric photoproducts. The importance of these two classes of oxidatively generated damage to DNA significantly increases together with a smaller contribution of oxidized pyrimidine bases upon UVA irradiation. This is rationalized in terms of sensitized photooxidation reactions predominantly mediated by singlet oxygen together with a small contribution of hydroxyl radical that appear to also be implicated in the photodynamic effects of the blue light component of visible light. Chemiexcitation-mediated formation of "dark" cyclobutane pyrimidine dimers in UVA-irradiated melanocytes is a recent major discovery that implicates in the initial stage, a delayed generation of reactive oxygen and nitrogen species giving rise to triplet excited carbonyl intermediate and possibly singlet oxygen. High-intensity UVC nanosecond laser radiation constitutes a suitable source of light to generate pyrimidine and purine radical cations in cellular DNA via efficient biphotonic ionization.
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Affiliation(s)
- Jean Cadet
- Département de Médecine nucléaire et Radiobiologie, Faculté de Médecine, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Dimitar Angelov
- Laboratoire de Biologie et de Modélisation de la Cellule LMBC, Ecole Normale Supérieure de Lyon, CNRS, Université de Lyon, Lyon, France
- Izmir Biomedicine and Genome Center IBG, Dokuz Eylul University, Balçova, Izmir, Turkey
| | - Paolo Di Mascio
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - J Richard Wagner
- Département de Médecine nucléaire et Radiobiologie, Faculté de Médecine, Université de Sherbrooke, Sherbrooke, Quebec, Canada
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2
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Yang HC, Scruggs SS, Chai M, Mathai G, Taylor JS, Gross ML. Distinguishing Isomeric Cyclobutane Thymidine Dimers by Ion Mobility and Tandem Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024. [PMID: 38952267 DOI: 10.1021/jasms.4c00133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Irradiation of the major conformation of duplex DNA found in cells (B form) produces cyclobutane pyrimidine dimers (CPDs) from adjacent pyrimidines in a head-to-head orientation (syn) with the C5 substituents in a cis stereochemistry. These CPDs have crucial implications in skin cancer. Irradiation of G-quadruplexes and other non-B DNA conformations in vitro produces, however, CPDs between nonadjacent pyrimidines in nearby loops with syn and head-to-tail orientations (anti) with both cis and trans stereochemistry to yield a mixture of six possible isomers of the T=T dimer. This outcome is further complicated by formation of mixtures of nonadjacent CPDs of C=T, T=C, and C=C, and successful analysis depends on development of specific and sensitive methods. Toward meeting this need, we investigated whether ion mobility mass spectrometry (IMMS) and MS/MS can distinguish the cis,syn and trans,anti T=T CPDs. Ion mobility can afford baseline separation and give relative mobilities that are in accord with predicted cross sections. Complementing this ability to distinguish isomers is MS/MS collisional activation where fragmentation also distinguishes the two isomers and confirms conclusions drawn from ion mobility analysis. The observations offer early support that ion mobility and MS/MS can enable the distinction of DNA photoproduct isomers.
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Affiliation(s)
- Hsin-Chieh Yang
- Department of Chemistry Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Savannah S Scruggs
- Department of Chemistry Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Mengqi Chai
- Department of Chemistry Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - George Mathai
- Department of Chemistry Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - John-Stephen Taylor
- Department of Chemistry Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Michael L Gross
- Department of Chemistry Washington University in St. Louis, St. Louis, Missouri 63130, United States
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3
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Douki T, Millot O, Buhot A. Data Processing for Predicting DNA Damaging Properties of Complex UV Sources. Chemphyschem 2024:e202400549. [PMID: 39031647 DOI: 10.1002/cphc.202400549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Revised: 06/13/2024] [Accepted: 06/18/2024] [Indexed: 07/22/2024]
Abstract
A growing number of experimental evidence emphasizes that photobiological phenomena are not always the sum of the effect of individual wavelengths present in the emission spectrum of light sources. Unfortunately, tools are missing to identify such non-additive effects and predict effects of various exposure conditions. In the present work, we addressed these points for the formation of pyrimidine dimers in DNA upon co-exposure to UVC, UVB and UVA radiation. We first applied a combination index approach to determine whether mixtures of theses UV ranges exhibited additive, inhibitory or synergistic effects on the formation of cyclobutane pyrimidine dimers, (6-4) photoproducts and Dewar valence isomers. A predictive approach based on an experimental design strategy was then used to quantify the contribution of each wavelength range to the formation of DNA photoproducts. The obtained models allowed us to accurately predict the level of pyrimidine dimers in DNA irradiated under different conditions. The data were found to be more accurate than those obtained with the simple additive approach underlying the use of action spectra. Experimental design thus appears as an attractive concept that could be widely applied in photobiology even for cellular experiments.
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Affiliation(s)
- Thierry Douki
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES/CIBEST, 38000, Grenoble, France
| | - Océane Millot
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES/CIBEST, 38000, Grenoble, France
| | - Arnaud Buhot
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG, SyMMES/CREAB, 38000, Grenoble, France
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4
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Castejón-Griñán M, Cerdido S, Sánchez-Beltrán J, Lambertos A, Abrisqueta M, Herraiz C, Jiménez-Cervantes C, García-Borrón JC. Melanoma-associated melanocortin 1 receptor variants confer redox signaling-dependent protection against oxidative DNA damage. Redox Biol 2024; 72:103135. [PMID: 38565069 PMCID: PMC11002308 DOI: 10.1016/j.redox.2024.103135] [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: 02/12/2024] [Revised: 03/12/2024] [Accepted: 03/25/2024] [Indexed: 04/04/2024] Open
Abstract
Cutaneous melanoma, a lethal skin cancer, arises from malignant transformation of melanocytes. Solar ultraviolet radiation (UVR) is a major environmental risk factor for melanoma since its interaction with the skin generates DNA damage, either directly or indirectly via oxidative stress. Pheomelanin pigments exacerbate oxidative stress in melanocytes by UVR-dependent and independent mechanisms. Thus, oxidative stress is considered to contribute to melanomagenesis, particularly in people with pheomelanic pigmentation. The melanocortin 1 receptor gene (MC1R) is a major melanoma susceptibility gene. Frequent MC1R variants (varMC1R) associated with fair skin and red or yellow hair color display hypomorphic signaling to the cAMP pathway and are associated with higher melanoma risk. This association is thought to be due to production of photosensitizing pheomelanins as well as deficient induction of DNA damage repair downstream of varMC1R. However, the data on modulation of oxidative DNA damage repair by MC1R remain scarce. We recently demonstrated that varMC1R accelerates clearance of reactive oxygen species (ROS)-induced DNA strand breaks in an AKT-dependent manner. Here we show that varMC1R also protects against ROS-dependent formation of 8-oxodG, the most frequent oxidative DNA lesion. Since the base excision repair (BER) pathway mediates clearance of these DNA lesions, we analyzed induction of BER enzymes in human melanoma cells of varMC1R genotype. Agonist-mediated activation of both wildtype (wtMC1R) and varMC1R significantly induced OGG and APE-1/Ref1, the rate-limiting BER enzymes responsible for repair of 8-oxodG. Moreover, we found that NADPH oxidase (NOX)-dependent generation of ROS was responsible for AKT activation and oxidative DNA damage repair downstream of varMC1R. These observations provide a better understanding of the functional properties of melanoma-associated MC1R alleles and may be useful for the rational development of strategies to correct defective varMC1R responses for efficient photoprotection and melanoma prevention in fair-skinned individuals.
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Affiliation(s)
- María Castejón-Griñán
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
| | - Sonia Cerdido
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
| | - José Sánchez-Beltrán
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
| | - Ana Lambertos
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
| | - Marta Abrisqueta
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
| | - Cecilia Herraiz
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
| | - Celia Jiménez-Cervantes
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
| | - José Carlos García-Borrón
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Biomedical Research Institute of Murcia (Instituto Murciano de Investigación Biosanitaria, IMIB), El Palmar, Murcia, Spain.
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5
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Al-Sadek T, Yusuf N. Ultraviolet Radiation Biological and Medical Implications. Curr Issues Mol Biol 2024; 46:1924-1942. [PMID: 38534742 DOI: 10.3390/cimb46030126] [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: 02/05/2024] [Revised: 02/27/2024] [Accepted: 02/28/2024] [Indexed: 03/28/2024] Open
Abstract
Ultraviolet (UV) radiation plays a crucial role in the development of melanoma and non-melanoma skin cancers. The types of UV radiation are differentiated by wavelength: UVA (315 to 400 nm), UVB (280 to 320 nm), and UVC (100 to 280 nm). UV radiation can cause direct DNA damage in the forms of cyclobutane pyrimidine dimers (CPDs) and 6-4 photoproducts (6-4PPs). In addition, UV radiation can also cause DNA damage indirectly through photosensitization reactions caused by reactive oxygen species (ROS), which manifest as 8-hydroxy-2'-deoxyguanine (8-OHdG). Both direct and indirect DNA damage can lead to mutations in genes that promote the development of skin cancers. The development of melanoma is largely influenced by the signaling of the melanocortin one receptor (MC1R), which plays an essential role in the synthesis of melanin in the skin. UV-induced mutations in the BRAF and NRAS genes are also significant risk factors in melanoma development. UV radiation plays a significant role in basal cell carcinoma (BCC) development by causing mutations in the Hedgehog (Hh) pathway, which dysregulates cell proliferation and survival. UV radiation can also induce the development of squamous cell carcinoma via mutations in the TP53 gene and upregulation of MMPs in the stroma layer of the skin.
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Affiliation(s)
- Tarek Al-Sadek
- Department of Dermatology, UAB Heersink School of Medicine, Birmingham, AL 35294, USA
| | - Nabiha Yusuf
- Department of Dermatology, UAB Heersink School of Medicine, Birmingham, AL 35294, USA
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6
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Korhonen E. Inflammasome activation in response to aberrations of cellular homeostasis in epithelial cells from human cornea and retina. Acta Ophthalmol 2024; 102 Suppl 281:3-68. [PMID: 38386419 DOI: 10.1111/aos.16646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 01/16/2024] [Indexed: 02/24/2024]
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7
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Maggiori C, Fernández-Martínez MA, Bourdages LJ, Sánchez-García L, Moreno-Paz M, Sobrado JM, Carrizo D, Vicente-Retortillo Á, Goordial J, Whyte LG. Biosignature Detection and MinION Sequencing of Antarctic Cryptoendoliths After Exposure to Mars Simulation Conditions. ASTROBIOLOGY 2024; 24:44-60. [PMID: 38153386 DOI: 10.1089/ast.2023.0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
In the search for life in our Solar System, Mars remains a promising target based on its proximity and similarity to Earth. When Mars transitioned from a warmer, wetter climate to its current dry and freezing conditions, any putative extant life probably retreated into habitable refugia such as the subsurface or the interior of rocks. Terrestrial cryptoendolithic microorganisms (i.e., those inhabiting rock interiors) thus represent possible modern-day Mars analogs, particularly those from the hyperarid McMurdo Dry Valleys in Antarctica. As DNA is a strong definitive biosignature, given that there is no known abiotic chemistry that can polymerize nucleobases, we investigated DNA detection with MinION sequencing in Antarctic cryptoendoliths after an ∼58-sol exposure in MARTE, a Mars environmental chamber capable of simulating martian temperature, pressure, humidity, ultraviolet (UV) radiation, and atmospheric composition, in conjunction with protein and lipid detection. The MARTE conditions resulted in changes in community composition and DNA, proteins, and cell membrane-derived lipids remained detectable postexposure. Of the multitude of extreme environmental conditions on Mars, UV radiation (specifically UVC) is the most destructive to both cells and DNA. As such, we further investigated if a UVC exposure corresponding to ∼278 martian years would impede DNA detection via MinION sequencing. The MinION was able to successfully detect and sequence DNA after this UVC radiation exposure, suggesting its utility for life detection in future astrobiology missions focused on finding relatively recently exposed biomarkers inside possible martian refugia.
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Affiliation(s)
- Catherine Maggiori
- Department of Biology, Georgetown University, Washington, District of Columbia, USA
| | - Miguel Angel Fernández-Martínez
- Department of Natural Resource Sciences, Faculty of Agricultural and Environmental Sciences, McGill University, Ste. Anne-de-Bellevue, Quebec, Canada
- Department of Ecology, Universidad Autónoma de Madrid, Ciudad Universitaria de Cantoblanco, Madrid, Spain
| | - Louis-Jacques Bourdages
- Department of Natural Resource Sciences, Faculty of Agricultural and Environmental Sciences, McGill University, Ste. Anne-de-Bellevue, Quebec, Canada
| | | | | | | | | | | | - Jacqueline Goordial
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Lyle G Whyte
- Department of Natural Resource Sciences, Faculty of Agricultural and Environmental Sciences, McGill University, Ste. Anne-de-Bellevue, Quebec, Canada
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8
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Bezabih MS, Kaliakin DS, Blanco-González A, Barneschi L, Tarnovsky AN, Olivucci M. Comparative Study of Uracil Excited-State Photophysics in Water and Acetonitrile via RMS-CASPT2-Driven Quantum-Classical Trajectories. J Phys Chem B 2023; 127:10871-10879. [PMID: 38055701 DOI: 10.1021/acs.jpcb.3c06433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
We present a nonadiabatic molecular dynamics study of the ultrafast processes occurring in uracil upon UV light absorption, leading to electronic excitation and subsequent nonradiative decay. Previous studies have indicated that the mechanistic details of this process are drastically different depending on whether the process takes place in the gas phase, acetonitrile, or water. However, such results have been produced using quantum chemical methods that did not incorporate both static and dynamic electron correlation. In order to assess the previously proposed mechanisms, we simulate the photodynamics of uracil in the three environments mentioned above using quantum-classical trajectories and, for solvated uracil, hybrid quantum mechanics/molecular mechanics (QM/MM) models driven by the rotated multistate complete active space second-order perturbation (RMS-CASPT2) method. To do so, we exploit the gradient recently made available in OpenMolcas and compare the results to those obtained using the complete active space self-consistent field (CASSCF) method only accounting for static electron correlation. We show that RMS-CASPT2 produces, in general, a mechanistic picture different from the one obtained at the CASSCF level but confirms the hypothesis advanced on the basis of previous ROKS and TDDFT studies thus highlighting the importance of incorporating dynamic electron correlation in the investigation of ultrafast electronic deactivation processes.
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Affiliation(s)
- Meseret Simachew Bezabih
- Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Danil S Kaliakin
- Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | | | - Leonardo Barneschi
- Dipartimento di Biotechnologie, Chimica e Farmacia, Università di Siena, I-53100 Siena, Italy
| | - Alexander N Tarnovsky
- Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Massimo Olivucci
- Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, United States
- Dipartimento di Biotechnologie, Chimica e Farmacia, Università di Siena, I-53100 Siena, Italy
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9
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He L, Tomaník L, Malerz S, Trinter F, Trippel S, Belina M, Slavíček P, Winter B, Küpper J. Specific versus Nonspecific Solvent Interactions of a Biomolecule in Water. J Phys Chem Lett 2023; 14:10499-10508. [PMID: 37970807 PMCID: PMC10683073 DOI: 10.1021/acs.jpclett.3c01763] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 08/23/2023] [Indexed: 11/19/2023]
Abstract
Solvent interactions, particularly hydration, are vital in chemical and biochemical systems. Model systems reveal microscopic details of such interactions. We uncover a specific hydrogen-bonding motif of the biomolecular building block indole (C8H7N), tryptophan's chromophore, in water: a strong localized N-H···OH2 hydrogen bond, alongside unstructured solvent interactions. This insight is revealed from a combined experimental and theoretical analysis of the electronic structure of indole in aqueous solution. We recorded the complete X-ray photoemission and Auger spectrum of aqueous-phase indole, quantitatively explaining all peaks through ab initio modeling. The efficient and accurate technique for modeling valence and core photoemission spectra involves the maximum-overlap method and the nonequilibrium polarizable-continuum model. A two-hole electron-population analysis quantitatively describes the Auger spectra. Core-electron binding energies for nitrogen and carbon highlight the specific interaction with a hydrogen-bonded water molecule at the N-H group and otherwise nonspecific solvent interactions.
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Affiliation(s)
- Lanhai He
- Center
for Free-Electron Laser Science, Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Institute
of Atomic and Molecular Physics, Jilin University, 130012 Changchun, China
| | - Lukáš Tomaník
- Department
of Physical Chemistry, University of Chemistry
and Technology, Technická 5, 16628 Prague, Czech Republic
| | - Sebastian Malerz
- Molecular
Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Florian Trinter
- Molecular
Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straße
1, 60438 Frankfurt
am Main, Germany
| | - Sebastian Trippel
- Center
for Free-Electron Laser Science, Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Center
for Ultrafast Imaging, Universität
Hamburg, Luruper Chaussee
149, 22761 Hamburg, Germany
| | - Michal Belina
- Department
of Physical Chemistry, University of Chemistry
and Technology, Technická 5, 16628 Prague, Czech Republic
| | - Petr Slavíček
- Department
of Physical Chemistry, University of Chemistry
and Technology, Technická 5, 16628 Prague, Czech Republic
| | - Bernd Winter
- Molecular
Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Jochen Küpper
- Center
for Free-Electron Laser Science, Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Center
for Ultrafast Imaging, Universität
Hamburg, Luruper Chaussee
149, 22761 Hamburg, Germany
- Department
of Physics, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
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10
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Douki T, Caillat S, Bacqueville D, Géniès C, Huyghe C, Duplan H, Le Digabel J, Lauze C, Filiol J, Marinescu R, Bouyer K, Questel E, Josse G. Nuclear and Urinary Measurements Show the Efficacy of Sun-Protection Factor 50+ Sunscreen against DNA Photoproducts upon Real-Life Recreational Exposure. JID INNOVATIONS 2023; 3:100227. [PMID: 37886699 PMCID: PMC10597780 DOI: 10.1016/j.xjidi.2023.100227] [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: 01/16/2023] [Revised: 05/05/2023] [Accepted: 06/02/2023] [Indexed: 10/28/2023] Open
Abstract
Sunscreens have been shown to protect against UVR-induced DNA damage in human skin under laboratory conditions. We presently extended these observations to real-life conditions in volunteers after their ordinary exposure habits during summer holidays. Volunteers were randomly assigned to a control group and an educated group supplied with a SPF ≥50 sunscreen and receiving instructions for use. A questionnaire was used to determine the extent of exposure. No difference in average solar UVR exposure was found between the two groups. DNA photoprotection was first assessed by, to our knowledge, a previously unreported noninvasive assay on the basis of the quantification of pyrimidine dimers released by DNA repair in urine. Damage was also quantified in the nuclear DNA extracted from the roof of suction blisters collected after recreational exposure. The urinary concentration of photoproducts was significantly higher in the control than in the educated group. The same trend was observed for the level of photoproducts in the DNA from suction blisters. The unambiguous observation of an efficient photoprotection against DNA damage afforded by sunscreen under real-life conditions provides strong support for the efficiency of the sunscreens. In addition, the results validate the use of urinary DNA photoproducts as a noninvasive assay applicable to photoprotection.
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Affiliation(s)
- Thierry Douki
- SyMMES, IRIG, CEA, CNRS, Université Grenoble Alpes, Grenoble, France
| | - Sylvain Caillat
- SyMMES, IRIG, CEA, CNRS, Université Grenoble Alpes, Grenoble, France
| | | | - Camille Géniès
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Celine Huyghe
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Hélène Duplan
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Jimmy Le Digabel
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Christophe Lauze
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Jerome Filiol
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Razvan Marinescu
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Karine Bouyer
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Emmanuel Questel
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
| | - Gwendal Josse
- R&D - Dermo-cosmetique - Laboratoires Pierre Fabre, Toulouse, France
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11
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Improta R. Shedding Light on the Photophysics and Photochemistry of I-Motifs Using Quantum Mechanical Calculations. Int J Mol Sci 2023; 24:12614. [PMID: 37628797 PMCID: PMC10454157 DOI: 10.3390/ijms241612614] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
I-motifs are non-canonical DNA structures formed by intercalated hemiprotonated (CH·C)+ pairs, i.e., formed by a cytosine (C) and a protonated cytosine (CH+), which are currently drawing great attention due to their biological relevance and promising nanotechnological properties. It is important to characterize the processes occurring in I-motifs following irradiation by UV light because they can lead to harmful consequences for genetic code and because optical spectroscopies are the most-used tools to characterize I-motifs. By using time-dependent DFT calculations, we here provide the first comprehensive picture of the photoactivated behavior of the (CH·C)+ core of I-motifs, from absorption to emission, while also considering the possible photochemical reactions. We reproduce and assign their spectral signatures, i.e., infrared, absorption, fluorescence and circular dichroism spectra, disentangling the underlying chemical-physical effects. We show that the main photophysical paths involve C and CH+ bases on adjacent steps and, using this basis, interpret the available time-resolved spectra. We propose that a photodimerization reaction can occur on an excited state with strong C→CH+ charge transfer character and examine some of the possible photoproducts. Based on the results reported, some future perspectives for the study of I-motifs are discussed.
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Affiliation(s)
- Roberto Improta
- Consiglio Nazionale delle Ricerche, Istituto di Biostrutture e Bioimmagini (IBB-CNR), Via De Amicis 95, I-80145 Napoli, Italy
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12
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Chen W, Tang Z, Hu S, Yi X, Wang J. Ultraviolet C Irradiation-Induced Dehybridization of Double-Stranded Oligonucleotides: Mechanism Investigation and Label-Free Measurement of the Photodamage Level. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15190-15197. [PMID: 36459591 DOI: 10.1021/acs.langmuir.2c02231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Elucidating the mechanism and estimating the extent of conformation change of double-stranded DNA (dsDNA) upon ultraviolet (UV) exposure are of vital importance for understanding the DNA photodamage process. The existing research was mainly focused on the lesions of single-stranded DNA (ssDNA) and involved off-site measurement of the photodamage level. In this work, short-wavelength UV (UVC) (254 nm) irradiation was demonstrated to induce the dehybridization of dsDNA due to the loss of paring capacity of photodamaged pyrimidine nucleobases. The intrinsic programmability of dsDNA enabled researchers to rationally design the on-demand dehybridization sites. The spatial conformation switch of dsDNA caused by UVC irradiation could be evolved into a label-free sensing platform for the on-site measurement of the DNA photodamage level.
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Affiliation(s)
- Wenchao Chen
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Zhilian Tang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Shengqiang Hu
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Xinyao Yi
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Jianxiu Wang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
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13
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Fu J, Xu Y, Arts EJ, Bai Z, Chen Z, Zheng Y. Viral disinfection using nonthermal plasma: A critical review and perspectives on the plasma-catalysis system. CHEMOSPHERE 2022; 309:136655. [PMID: 36191766 DOI: 10.1016/j.chemosphere.2022.136655] [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: 08/29/2022] [Revised: 09/25/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
The transmission of viral infections via aerosol has become a serious threat to public health. This has produced an ever-increasing demand for effective forms of viral inactivation technology/processes. Plasma technology is rising in popularity and gaining interest for viral disinfection use. Due to its highly effectively disinfection and flexible operation, non-thermal plasma (NTP) is a promising technology in decontaminating bacteria or virus from air or surfaces. This review discusses the fundamentals of non-thermal plasma and the disinfection mechanisms of the biocidal agents produced in plasma, including ultraviolet (UV) photons, reactive oxygen species, and reactive nitrogen species. Perspectives on the role of catalysts and its potential applications in cold plasma disinfection are discussed.
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Affiliation(s)
- Jile Fu
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Fine Chemicals Green Manufacturing, Henan Normal University, Xinxiang, 453007, China; Department of Chemical and Biochemical Engineering, Western University, London, Ontario, Canada
| | - Yiyi Xu
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, Canada
| | - Eric J Arts
- Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada
| | - Zhengyu Bai
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Fine Chemicals Green Manufacturing, Henan Normal University, Xinxiang, 453007, China.
| | - Zhongwei Chen
- Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, Canada.
| | - Ying Zheng
- Department of Chemical and Biochemical Engineering, Western University, London, Ontario, Canada.
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14
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Reynaud N, Belz L, Béal D, Bacqueville D, Duplan H, Géniès C, Questel E, Josse G, Douki T. DNA photoproducts released by repair in biological fluids as biomarkers of the genotoxicity of UV radiation. Anal Bioanal Chem 2022; 414:7705-7720. [PMID: 36063170 DOI: 10.1007/s00216-022-04302-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 08/17/2022] [Accepted: 08/22/2022] [Indexed: 01/12/2023]
Abstract
UV-induced formation of photoproducts in DNA is a major initiating event of skin cancer. Consequently, many analytical tools have been developed for their quantification in DNA. In the present work, we extended our previous liquid chromatography-mass spectrometry method to the quantification of the short DNA fragments containing photoproducts that are released from cells by the repair machinery. We designed a robust protocol including a solid-phase extraction step (SPE), an enzymatic treatment aimed at releasing individual photoproducts, and a liquid chromatography method combining on-line SPE and ultra-high-performance liquid chromatography for optimal specificity and sensitivity. We also added relevant internal standards for a better accuracy. The method was validated for linearity, repeatability, and reproducibility. The limits of detection and quantification were found to be in the fmol range. The proof of concept of the use of excreted DNA repair products as biomarkers of the genotoxicity of UV was obtained first in in vitro studies using cultured HaCat cells and ex vivo on human skin explants. Further evidence was obtained from the detection of pyrimidine dimers in the urine of human volunteers collected after recreational exposure in summer. An assay was designed to quantify the DNA photoproducts released from cells within short fragments by the DNA repair machinery. These oligonucleotides were isolated by solid-phase extraction and enzymatically hydrolyzed. The photoproducts were then quantified by on-line SPE combined with UHPLC-MS/MS with isotopic dilution.
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Affiliation(s)
- Noémie Reynaud
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38000, Grenoble, France
| | - Laura Belz
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38000, Grenoble, France
| | - David Béal
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38000, Grenoble, France
| | - Daniel Bacqueville
- Service Recherche Pharmaco-Clinique, Département Recherche Appliquée, Centre R&D Pierre Fabre, 31000, Toulouse, France
| | - Hélène Duplan
- Service Recherche Pharmaco-Clinique, Département Recherche Appliquée, Centre R&D Pierre Fabre, 31000, Toulouse, France
| | - Camille Géniès
- Service Recherche Pharmaco-Clinique, Département Recherche Appliquée, Centre R&D Pierre Fabre, 31000, Toulouse, France
| | - Emmanuel Questel
- Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, 31000, Toulouse, France
| | - Gwendal Josse
- Centre de Recherche sur la Peau, Pierre Fabre Dermo-Cosmétique, 31000, Toulouse, France
| | - Thierry Douki
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38000, Grenoble, France.
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15
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Felis E, Buta-Hubeny M, Zieliński W, Hubeny J, Harnisz M, Bajkacz S, Korzeniewska E. Solar-light driven photodegradation of antimicrobials, their transformation by-products and antibiotic resistance determinants in treated wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 836:155447. [PMID: 35469868 DOI: 10.1016/j.scitotenv.2022.155447] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/29/2022] [Accepted: 04/18/2022] [Indexed: 05/23/2023]
Abstract
This study aimed to assess the possibility of using solar light-driven photolysis and TiO2-based photocatalysis to remove (1) antibiotic residues, (2) their transformation products (TPs), (3) antibiotic resistance determinants, and (4) genes identifying the indicator bacteria in a treated wastewater (secondary effluent). 16 antimicrobials belonging to the different classes and 45 their transformation by-products were selected for the study. The most susceptible to photochemical decomposition was tetracycline, which was completely removed in the photocatalysis process and in more than 80% in the solar light-driven photolysis. 83.8% removal (on average) was observed using photolysis and 89.9% using photocatalysis in the case of the tested genes, among which the genes sul1, uidA, and intI1 showed the highest degree of removal by both methods. The study revealed that applied methods promisingly remove the tested antibiotics, their TPs and genes even in such a complex matrix including treated wastewater and photocatalysis process had a higher removal efficiency of antibiotics, TPs and genes tested. Moreover, the high percentage removal of the intI1 gene (>93%) indicates the possibilities of use of the solar light-driven photolysis and TiO2-based photocatalysis in minimizing the antibiotic resistance genes transfer by mobile genetic elements.
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Affiliation(s)
- Ewa Felis
- Silesian University of Technology, Faculty of Power and Environmental Engineering, Environmental Biotechnology Department, Akademicka 2, 44-100 Gliwice, Poland; Silesian University of Technology, Centre for Biotechnology, ul. B. Krzywoustego 8, 44-100 Gliwice, Poland.
| | - Martyna Buta-Hubeny
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-719 Olsztyn, Poland
| | - Wiktor Zieliński
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-719 Olsztyn, Poland
| | - Jakub Hubeny
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-719 Olsztyn, Poland
| | - Monika Harnisz
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-719 Olsztyn, Poland
| | - Sylwia Bajkacz
- Silesian University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, B. Krzywoustego 6 Str., 44-100 Gliwice, Poland; Silesian University of Technology, Centre for Biotechnology, ul. B. Krzywoustego 8, 44-100 Gliwice, Poland
| | - Ewa Korzeniewska
- Department of Water Protection Engineering and Environmental Microbiology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, Prawocheńskiego 1, 10-719 Olsztyn, Poland
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16
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The UV Dose Used for Disinfection of Drinking Water in Sweden Inadequately Inactivates Enteric Virus with Double-Stranded Genomes. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19148669. [PMID: 35886521 PMCID: PMC9316100 DOI: 10.3390/ijerph19148669] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/11/2022] [Accepted: 07/14/2022] [Indexed: 02/04/2023]
Abstract
Irradiation with ultraviolet light (UV) at 254 nm is effective in inactivating a wide range of human pathogens. In Sweden, a UV dose of 400 J/m2 is often used for the treatment of drinking water. To investigate its effect on virus inactivation, enteric viruses with different genomic organizations were irradiated with three UV doses (400, 600, and 1000 J/m2), after which their viability on cell cultures was examined. Adenovirus type 2 (double-stranded DNA), simian rotavirus 11 (double-stranded RNA), and echovirus 30 (single-stranded RNA) were suspended in tap water and pumped into a laboratory-scale Aquada 1 UV reactor. Echovirus 30 was reduced by 3.6-log10 by a UV dose of 400 J/m2. Simian rotavirus 11 and adenovirus type 2 were more UV resistant with only 1-log10 reduction at 400 J/m2 and needed 600 J/m2 for 2.9-log10 and 3.1-log10 reductions, respectively. There was no significant increase in the reduction of viral viability at higher UV doses, which may indicate the presence of UV-resistant viruses. These results show that higher UV doses than those usually used in Swedish drinking water treatment plants should be considered in combination with other barriers to disinfect the water when there is a risk of fecal contamination of the water.
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Ratkaj I, Mušković M, Malatesti N. Targeting Microenvironment of Melanoma and Head and Neck Cancers
in Photodynamic Therapy. Curr Med Chem 2022; 29:3261-3299. [DOI: 10.2174/0929867328666210709113032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/23/2021] [Accepted: 05/26/2021] [Indexed: 11/22/2022]
Abstract
Background:
Photodynamic therapy (PDT), in comparison to other skin cancers,
is still far less effective for melanoma, due to the strong absorbance and the role of
melanin in cytoprotection. The tumour microenvironment (TME) has a significant role in
tumour progression, and the hypoxic TME is one of the main reasons for melanoma progression
to metastasis and its resistance to PDT. Hypoxia is also a feature of solid tumours
in the head and neck region that indicates negative prognosis.
Objective:
The aim of this study was to individuate and describe systematically the main
strategies in targeting the TME, especially hypoxia, in PDT against melanoma and head
and neck cancers (HNC), and assess the current success in their application.
Methods:
PubMed was used for searching, in MEDLINE and other databases, for the
most recent publications on PDT against melanoma and HNC in combination with the
TME targeting and hypoxia.
Results:
In PDT for melanoma and HNC, it is very important to control hypoxia levels,
and amongst the different approaches, oxygen self-supply systems are often applied. Vascular
targeting is promising, but to improve it, optimal drug-light interval, and formulation
to increase the accumulation of the photosensitiser in the tumour vasculature, have to
be established. On the other side, the use of angiogenesis inhibitors, such as those interfering
with VEGF signalling, is somewhat less successful than expected and needs to be
further investigated.
Conclusion:
The combination of PDT with immunotherapy by using multifunctional nanoparticles
continues to develop and seems to be the most promising for achieving a
complete and lasting antitumour effect.
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Affiliation(s)
- Ivana Ratkaj
- Department of Biotechnology, University of Rijeka, Rijeka, Croatia
| | - Martina Mušković
- Department of Biotechnology, University of Rijeka, Rijeka, Croatia
| | - Nela Malatesti
- Department of Biotechnology, University of Rijeka, Rijeka, Croatia
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18
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Zannier F, Portero LR, Douki T, Gärtner W, Farías ME, Albarracín VH. Proteomic Signatures of Microbial Adaptation to the Highest Ultraviolet-Irradiation on Earth: Lessons From a Soil Actinobacterium. Front Microbiol 2022; 13:791714. [PMID: 35369494 PMCID: PMC8965627 DOI: 10.3389/fmicb.2022.791714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 01/26/2022] [Indexed: 11/13/2022] Open
Abstract
In the Central Andean region in South America, high-altitude ecosystems (3500-6000 masl) are distributed across Argentina, Chile, Bolivia, and Peru, in which poly-extremophilic microbes thrive under extreme environmental conditions. In particular, in the Puna region, total solar irradiation and UV incidence are the highest on Earth, thus, restraining the physiology of individual microorganisms and the composition of microbial communities. UV-resistance of microbial strains thriving in High-Altitude Andean Lakes was demonstrated and their mechanisms were partially characterized by genomic analysis, biochemical and physiological assays. Then, the existence of a network of physiological and molecular mechanisms triggered by ultraviolet light exposure was hypothesized and called "UV-resistome". It includes some or all of the following subsystems: (i) UV sensing and effective response regulators, (ii) UV-avoidance and shielding strategies, (iii) damage tolerance and oxidative stress response, (iv) energy management and metabolic resetting, and (v) DNA damage repair. Genes involved in the described UV-resistome were recently described in the genome of Nesterenkonia sp. Act20, an actinobacterium which showed survival to high UV-B doses as well as efficient photorepairing capability. The aim of this work was to use a proteomic approach together with photoproduct measurements to help dissecting the molecular events involved in the adaptive response of a model High-Altitude Andean Lakes (HAAL) extremophilic actinobacterium, Nesterenkonia sp. Act20, under artificial UV-B radiation. Our results demonstrate that UV-B exposure induced over-abundance of a well-defined set of proteins while recovery treatments restored the proteomic profiles present before the UV-challenge. The proteins involved in this complex molecular network were categorized within the UV-resistome subsystems: damage tolerance and oxidative stress response, energy management and metabolic resetting, and DNA damage repair.
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Affiliation(s)
- Federico Zannier
- Laboratorio de Microbiología Ultraestructural y Molecular, Centro Integral de Microscopía Electrónica, Facultad de Agronomía y Zootecnia, UNT y Centro Científico Tecnológico, CONICET NOASUR, San Miguel de Tucumán, Argentina
- Laboratorio de Investigaciones Microbiológicas de Lagunas Andinas, Planta Piloto de Procesos Industriales y Microbiológicos, Centro Científico Tecnológico, CONICET NOASUR, San Miguel de Tucumán, Argentina
| | - Luciano R. Portero
- Laboratorio de Microbiología Ultraestructural y Molecular, Centro Integral de Microscopía Electrónica, Facultad de Agronomía y Zootecnia, UNT y Centro Científico Tecnológico, CONICET NOASUR, San Miguel de Tucumán, Argentina
- Laboratorio de Investigaciones Microbiológicas de Lagunas Andinas, Planta Piloto de Procesos Industriales y Microbiológicos, Centro Científico Tecnológico, CONICET NOASUR, San Miguel de Tucumán, Argentina
| | - Thierry Douki
- Université Grenoble Alpes, Commissariat a l’Energie Atomique et aux Energies Alternatives, Centre National de la Recherche Scientifique, Institut de Recherche Interdisciplinaire de Grenoble–Systèmes Moléculaires et nanoMatériaux p our l’Énergie et la Santé, Grenoble, France
| | - Wolfgang Gärtner
- Institute of Analytical Chemistry, University of Leipzig, Leipzig, Germany
| | - María E. Farías
- Laboratorio de Microbiología Ultraestructural y Molecular, Centro Integral de Microscopía Electrónica, Facultad de Agronomía y Zootecnia, UNT y Centro Científico Tecnológico, CONICET NOASUR, San Miguel de Tucumán, Argentina
| | - Virginia H. Albarracín
- Laboratorio de Microbiología Ultraestructural y Molecular, Centro Integral de Microscopía Electrónica, Facultad de Agronomía y Zootecnia, UNT y Centro Científico Tecnológico, CONICET NOASUR, San Miguel de Tucumán, Argentina
- Laboratorio de Investigaciones Microbiológicas de Lagunas Andinas, Planta Piloto de Procesos Industriales y Microbiológicos, Centro Científico Tecnológico, CONICET NOASUR, San Miguel de Tucumán, Argentina
- Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina
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Fedotov DA, Paul AC, Koch H, Santoro F, Coriani S, Improta R. Excited state absorption of DNA bases in the gas phase and in chloroform solution: a comparative quantum mechanical study. Phys Chem Chem Phys 2022; 24:4987-5000. [PMID: 35142309 DOI: 10.1039/d1cp04340d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We study the excited state absorption (ESA) properties of the four DNA bases (thymine, cytosine, adenine, and guanine) by different single reference quantum mechanical methods, namely, equation of motion coupled cluster singles and doubles (EOM-CCSD), singles, doubles and perturbative triples (EOM-CC3), and time-dependent density functional theory (TD-DFT), with the long-range corrected CAM-B3LYP functional. Preliminary results at the Tamm-Dancoff (TDA) CAM-B3LYP level using the maximum overlap method (MOM) are reported for thymine. In the gas phase, the three methods predict similar One Photon Absorption (OPA) spectra, which are consistent with the experimental results and with the most accurate computational studies available in the literature. The ESA spectra are then computed for the ππ* states (one for pyrimidine, two for purines) associated with the lowest-energy absorption band, and for the close-lying nπ* state. The EOM-CC3, EOM-CCSD and CAM-B3LYP methods provide similar ESA spectral patterns, which are also in qualitative agreement with literature RASPT2 results. Once validated in the gas phase, TD-CAM-B3LYP has been used to compute the ESA in chloroform, including solvent effects by the polarizable continuum model (PCM). The predicted OPA and ESA spectra in chloroform are very similar to those in the gas phase, most of the bands shifting by less than 0.1 eV, with a small increase of the intensities and a moderate destabilization of the nπ* state. Finally, ESA spectra have been computed from the minima of the lowest energy ππ* state, and found in line with the available experimental transient absorption spectra of the nucleosides in solution, providing further validation of our computational approach.
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Affiliation(s)
- Daniil A Fedotov
- DTU Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.
| | - Alexander C Paul
- Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Henrik Koch
- Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway.,Scuola Normale Superiore, Piazza dei Cavalieri, 7, I-56126, Pisa, Italy.
| | - Fabrizio Santoro
- Istituto di Chimica dei Composti Organometallici (ICCOM-CNR), Area della Ricerca del CNR, I-56124 Pisa, Italy.
| | - Sonia Coriani
- DTU Chemistry, Technical University of Denmark, 2800 Kongens Lyngby, Denmark. .,Department of Chemistry, NTNU - Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - Roberto Improta
- Istituto di Biostrutture e Bioimmagini-CNR, I-80134 Napoli, Italy.
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Huo H, He Y, Chen W, Wu L, Yi X, Wang J. Simultaneously monitoring UVC-induced DNA damage and photoenzymatic repair of cyclobutane pyrimidine dimers by electrochemical impedance spectroscopy. Talanta 2021; 239:123081. [PMID: 34823862 DOI: 10.1016/j.talanta.2021.123081] [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: 08/11/2021] [Revised: 11/13/2021] [Accepted: 11/17/2021] [Indexed: 10/19/2022]
Abstract
Cyclobutane pyrimidine dimers (CPDs) are the major DNA photoproducts of thymine-thymine dinucleotides upon ultraviolet (UV) irradiation. Failure in the repair of damaged DNA may lead to DNA replication errors, DNA mutations, and even cell death. Photoreactivation can mediate the repair of UV-induced DNA lesions by photolyases upon UVA (315-400 nm) or blue light (400-500 nm) irradiation. Herein, the UVC (254 nm)-induced DNA damage and photoenzymatic repair of the CPD products were simultaneously monitored by electrochemical impedance spectroscopy (EIS). The UVC-damaged dT20 was first immobilized on the gold electrode, and the specific recognition by the anti-CPD antibody leads to significantly increased EIS signals. The electron transfer resistance (Ret) values were linearly proportional to the concentrations of damaged dT20 ranging from 0.005 to 0.1 μM, and a detection limit of 3.06 nM was achieved. Using surface plasmon resonance, the equilibrium dissociation constant (KD) between the CPDs in dT20 and anti-CPD antibody was estimated to be (3.32 ± 0.31) × 10-12 M, indicating the strong binding affinity. Evidenced by EIS, the CPDs in the damaged dT20 could be repaired by the attached DNA photolyase under UVA (365 nm) photoexcitation, and the detachment of the photolyase from the DNA strand was accomplished after completion of the repair process. The repair efficiency was calculated to be 70.0% by EIS, being consistent with that of 71.4% by UV spectroscopy. The electrochemical method is simple, sensitive and straightforward, holding great potential for assaying other types of DNA lesions and their repair processes.
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Affiliation(s)
- Huan Huo
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR China
| | - Yuhan He
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR China
| | - Wenchao Chen
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR China
| | - Ling Wu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, Hunan, 410004, PR China
| | - Xinyao Yi
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR China.
| | - Jianxiu Wang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, PR China.
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21
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Jacques C, Genies C, Bacqueville D, Tourette A, Borotra N, Chaves F, Sanches F, Gaudry AL, Bessou-Touya S, Duplan H. Ascorbic acid 2-glucoside: An ascorbic acid pro-drug with longer-term antioxidant efficacy in skin. Int J Cosmet Sci 2021; 43:691-702. [PMID: 34679221 DOI: 10.1111/ics.12745] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 10/16/2021] [Accepted: 10/19/2021] [Indexed: 01/05/2023]
Abstract
OBJECTIVE Deleterious effects of pollutants and ultraviolet radiation on the skin can be attenuated using formulations containing antioxidants. However, these have disadvantages, including chemical instability, photodegradation, poor bioavailability or biological activity. Here, two commercial formulations were evaluated: one optimized to stabilize and deliver ascorbic acid (AA) at 15% and the other containing a glucoside form of AA, namely ascorbic acid 2-glucoside (AA2G), at 1.8% and at a physiological pH. We compared the skin delivery, antioxidative effects and chemical stability of AA2G with AA in their respective formulations. METHODS Skin delivery was measured using fresh viable human skin explants, and oxidative stress was measured using a human reconstructed epidermal (RHE) model according to levels of malondialdehyde (MDA), superoxide dismutase (SOD) and catalase. RESULTS Ascorbic acid 2-glucoside was completely metabolized to AA by the skin before entering the receptor compartment. The skin contained parent and AA, indicating a reserve of AA2G was present for further metabolism. For AA2G and AA, maximum flux of AA-equivalents was at 12 h, with continued absorption over 24 h. The absolute amount in µg was higher in the skin after application of AA than after application of AA2G. This may suggest a greater antioxidative effect; however, according to all three measurements of oxidative stress, the protective effect of AA and AA2G was similar. Unlike AA, AA2G was chemically stable under storage conditions. CONCLUSION A lower concentration of AA2G is as effective as the active metabolite, AA, in terms of antioxidant effects. AA2G was chemically stable and can be applied at a lower concentration than AA, thus avoiding the need for an acidic formulation with a pH below 3.5.
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Affiliation(s)
- Carine Jacques
- Centre R&D Pierre Fabre, Applied Research Department, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Camille Genies
- Centre R&D Pierre Fabre, Applied Research Department, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Daniel Bacqueville
- Centre R&D Pierre Fabre, Applied Research Department, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Amelie Tourette
- Centre R&D Pierre Fabre, Applied Research Department, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Nathalie Borotra
- Centre R&D Pierre Fabre, Applied Research Department, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Fernanda Chaves
- Brazilian Innovation Center, Pierre Fabre Dermo-cosmétique, Barra da Tijuca - Rio de Janeiro, Brasil
| | - Fabio Sanches
- Brazilian Innovation Center, Pierre Fabre Dermo-cosmétique, Barra da Tijuca - Rio de Janeiro, Brasil
| | - Anne L Gaudry
- Brazilian Innovation Center, Pierre Fabre Dermo-cosmétique, Barra da Tijuca - Rio de Janeiro, Brasil
| | - Sandrine Bessou-Touya
- Centre R&D Pierre Fabre, Applied Research Department, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Hélène Duplan
- Centre R&D Pierre Fabre, Applied Research Department, Pierre Fabre Dermo-cosmétique, Toulouse, France
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22
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Jouybari MY, Green JA, Improta R, Santoro F. The Ultrafast Quantum Dynamics of Photoexcited Adenine-Thymine Basepair Investigated with a Fragment-based Diabatization and a Linear Vibronic Coupling Model. J Phys Chem A 2021; 125:8912-8924. [PMID: 34609880 PMCID: PMC9281421 DOI: 10.1021/acs.jpca.1c08132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
In
this contribution we present a quantum dynamical study of the
photoexcited hydrogen bonded base pair adenine–thymine (AT)
in a Watson–Crick arrangement. To that end, we parametrize
Linear Vibronic Coupling (LVC) models with Time-Dependent Density
Functional Theory (TD-DFT) calculations, exploiting a fragment diabatization
scheme (FrD) we have developed to define diabatic states on the basis
of individual chromophores in a multichromophoric system. Wavepacket
propagations were run with the multilayer extension of the Multiconfiguration
Time-Dependent Hartree method. We considered excitations to the three
lowest bright states, a ππ* state of
thymine and two ππ* states (La and Lb) of adenine, and we found that on the 100 fs time
scale the main decay pathways involve intramonomer population transfers
toward nπ* states of the same nucleobase. In AT this transfer
is less effective than in the isolated nucleobases, because hydrogen
bonding destabilizes the nπ* states. The population transfer
to the A → T charge transfer state is negligible, making the
ultrafast (femtosecond) decay through the proton coupled electron
transfer mechanism unlikely, in line with experimental results in
apolar solvents. The excitation energy transfer is also very small.
We carefully compare the predictions of LVC Hamiltonians obtained
with different sets of diabatic states, defined so to match either
local states of the two separated monomers or the base pair adiabatic
states in the Franck–Condon region. To that end we also extend
the flexibility of the FrD-LVC approach, introducing a new strategy
to define fragments diabatic states that account for the effect of
the rest of the multichromohoric system through a Molecular Mechanics
potential.
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Affiliation(s)
- Martha Yaghoubi Jouybari
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - James A Green
- Consiglio Nazionale delle Ricerche, Istituto di Biostrutture e Bioimmagini (IBB-CNR), via Mezzocannone 16, I-80136 Napoli, Italy
| | - Roberto Improta
- Consiglio Nazionale delle Ricerche, Istituto di Biostrutture e Bioimmagini (IBB-CNR), via Mezzocannone 16, I-80136 Napoli, Italy
| | - Fabrizio Santoro
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
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23
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Xie C, Fan Y, Yin S, Li Y, Liu N, Liu Y, Shu L, Fu Z, Wang Y, Zhang Y, Li X, Wang Y, Sun J, Yang X. Novel amphibian-derived antioxidant peptide protects skin against ultraviolet irradiation damage. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2021; 224:112327. [PMID: 34628205 DOI: 10.1016/j.jphotobiol.2021.112327] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 09/06/2021] [Accepted: 09/28/2021] [Indexed: 10/20/2022]
Abstract
Given the adverse impact of ultraviolet irradiation on human skin, as well as currently limited interventions, the discovery of new molecules with anti-photodamage potency remains critical. In this research, we obtained a new bioactive peptide (named OS-LL11, amino acid sequence 'LLPPWLCPRNK') from Odorrana schmackeri. Results showed that OS-LL11 could directly scavenge free radicals and sustain the viability of mouse keratinocytes challenged by ultraviolet B (UVB) irradiation or hydrogen peroxide (H2O2) by decreasing the levels of lipid peroxidation, malondialdehyde, and reactive oxygen species while increasing the level of catalase, Keap-1, HO-1, GCLM, and NQO1. Interestingly, topical application of OS-LL11 protected mouse skin against UVB irradiation damage by up-regulating the levels of superoxide dismutase, glutathione, and nitric oxide, but down-regulating the levels of H2O2, IL-1α, IL-1β, IL-6, TNF-α, 8-OHdG, Bcl-2, and Bax, as well as the number of apoptotic bodies. Our research demonstrated the anti-photodamage activity of a novel amphibian-derived peptide and the potential underlying mechanisms related to its free radical scavenging ability and antioxidant, anti-inflammatory, and anti-apoptotic activities. This study provides a new molecule for the development of anti-skin photodamage drugs or cosmetics and highlights the prospects of amphibian-derived peptides in photodamaged skin intervention.
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Affiliation(s)
- Chun Xie
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Yan Fan
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Saige Yin
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Yilin Li
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Naixin Liu
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Yixiang Liu
- Key Laboratory of Chemistry in Ethnic Medicine Resource, State Ethnic Affairs Commission & Ministry of Education, School of Ethnomedicine and Ethnopharmacy, Yunnan Minzu University, Kunming, Yunnan, 650504, China
| | - Longjun Shu
- Key Laboratory of Chemistry in Ethnic Medicine Resource, State Ethnic Affairs Commission & Ministry of Education, School of Ethnomedicine and Ethnopharmacy, Yunnan Minzu University, Kunming, Yunnan, 650504, China
| | - Zhe Fu
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Yinglei Wang
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Yue Zhang
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Xiaojie Li
- Department of Biochemistry and Molecular Biology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China
| | - Ying Wang
- Key Laboratory of Chemistry in Ethnic Medicine Resource, State Ethnic Affairs Commission & Ministry of Education, School of Ethnomedicine and Ethnopharmacy, Yunnan Minzu University, Kunming, Yunnan, 650504, China..
| | - Jun Sun
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China..
| | - Xinwang Yang
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, 650500, Yunnan, China..
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24
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Douki T, Buhot A. Synergistic or Antagonist Effects of Different UV Ranges Analyzed by the Combination Index: Application to DNA Photoproducts †. Photochem Photobiol 2021; 98:649-661. [PMID: 34555202 DOI: 10.1111/php.13528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 09/21/2021] [Indexed: 11/30/2022]
Abstract
Photobiological effects are known to greatly depend on the wavelength of the incident photons that define the nature of the activated chromophores. A growing number of experimental data show that considering the effect of complex light sources as a sum of the effects of monochromatic exposures can be misleading. Indeed, the combined exposure to several wavelength ranges may modulate photobiological responses or even induce novel processes. These observations are similar to a well-known topic in chemical toxicology: the nonadditivity of effects in mixtures where either antagonism or synergy are often observed. In the present work, we investigated whether a data analysis tool first developed for studying nonadditivity in mixtures of drugs, the combination index, could be applied to photobiological processes. We chose to work on the formation of UV-induced DNA photoproducts where additive, antagonist, and synergistic effects take place simultaneously. In addition to this application, we worked on the mathematical bases of the concept in order to broaden its applicability to phenomena exhibiting various dose-response patterns. We also addressed the question of the evaluation of the error on the determination of the combination index.
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Affiliation(s)
- Thierry Douki
- Univ. of Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, Grenoble Cedex 9, France
| | - Arnaud Buhot
- Univ. of Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, Grenoble Cedex 9, France
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25
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Jacques C, Bacqueville D, Jeanjean-Miquel C, Génies C, Noizet M, Tourette A, Bessou-Touya S, Duplan H. Sustained effect of two antioxidants (oxothiazolidine and δ-tocopheryl glucoside) for immediate and long-term sun protection in a sunscreen emulsion based on their different penetrating properties. Int J Cosmet Sci 2021; 43:391-404. [PMID: 33848378 DOI: 10.1111/ics.12705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/25/2021] [Accepted: 04/07/2021] [Indexed: 01/20/2023]
Abstract
OBJECTIVE We investigated the dermal bioavailability and antioxidative properties of a sunscreen formulation containing two antioxidants, oxothiazolidine (OTZ) and δ-tocopheryl glucoside (DTG). OTZ reacts directly with reactive oxygen species to form taurine, while DTG is metabolized in δ-tocopherol to achieve antioxidative activities. METHODS After topical application to a hair follicle-derived reconstructed human epidermis (RHE) model, followed by solar-simulated radiation, kinetics of bioavailability and antioxidative responses were measured over 24 h. Markers for oxidative stress were malondialdehyde (MDA), superoxide dismutase (SOD) and catalase activities. RESULTS The two antioxidants had different bioavailability profiles: OTZ was rapidly and extensively absorbed, whereas DTG was slowly absorbed and converted to δ-tocopherol. Compared to OTZ alone, the protection against effects on MDA levels and SOD and catalase activities was higher when DTG was used alone or in combination with OTZ. When used in combination, the degree of protection increased over time and remained constant over 24 h with maximal protection 2 h post-irradiation. DTG slowly penetrated into the skin and was present in the skin at all post-irradiation timepoints, thus allowing a slow but constant supply of δ-tocopherol over at least 24 h. By contrast, the oxidative protection by OTZ was immediate but short-lived due to its rapid penetration through the RHE and into the receptor fluid. CONCLUSION These results indicate a complementary sunlight protective action of OTZ and DTG with an immediate delivery of OTZ just after topical application of the formulation, and a prolonged skin delivery of δ-tocopherol from the slower penetration and metabolism of DTG.
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Affiliation(s)
- Carine Jacques
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Daniel Bacqueville
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Corinne Jeanjean-Miquel
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Camille Génies
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Maité Noizet
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Amelie Tourette
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Sandrine Bessou-Touya
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
| | - Hélène Duplan
- Centre R&D Pierre Fabre, Innovation et Développement Pharmacologie, Pierre Fabre Dermo-cosmétique, Toulouse, France
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26
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Lu C, Gutierrez-Bayona NE, Taylor JS. The effect of flanking bases on direct and triplet sensitized cyclobutane pyrimidine dimer formation in DNA depends on the dipyrimidine, wavelength and the photosensitizer. Nucleic Acids Res 2021; 49:4266-4280. [PMID: 33849058 PMCID: PMC8096240 DOI: 10.1093/nar/gkab214] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 03/15/2021] [Accepted: 04/08/2021] [Indexed: 12/11/2022] Open
Abstract
Cyclobutane pyrimidine dimers (CPDs) are the major products of DNA produced by direct absorption of UV light, and result in C to T mutations linked to human skin cancers. Most recently a new pathway to CPDs in melanocytes has been discovered that has been proposed to arise from a chemisensitized pathway involving a triplet sensitizer that increases mutagenesis by increasing the percentage of C-containing CPDs. To investigate how triplet sensitization may differ from direct UV irradiation, CPD formation was quantified in a 129-mer DNA designed to contain all 64 possible NYYN sequences. CPD formation with UVB light varied about 2-fold between dipyrimidines and 12-fold with flanking sequence and was most frequent at YYYR and least frequent for GYYN sites in accord with a charge transfer quenching mechanism. In contrast, photosensitized CPD formation greatly favored TT over C-containing sites, more so for norfloxacin (NFX) than acetone, in accord with their differing triplet energies. While the sequence dependence for photosensitized TT CPD formation was similar to UVB light, there were significant differences, especially between NFX and acetone that could be largely explained by the ability of NFX to intercalate into DNA.
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Affiliation(s)
- Chen Lu
- Department of Chemistry, Washington University, One Brookings Dr., St. Louis, MO 63130, USA
| | | | - John-Stephen Taylor
- Department of Chemistry, Washington University, One Brookings Dr., St. Louis, MO 63130, USA
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27
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Herraiz C, Martínez-Vicente I, Maresca V. The α-melanocyte-stimulating hormone/melanocortin-1 receptor interaction: A driver of pleiotropic effects beyond pigmentation. Pigment Cell Melanoma Res 2021; 34:748-761. [PMID: 33884776 DOI: 10.1111/pcmr.12980] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/25/2021] [Accepted: 04/13/2021] [Indexed: 12/21/2022]
Abstract
Melanocortin-1 Receptor (MC1R), when stimulated by alpha-melanocyte-stimulating hormone (α-MSH), is a driver of eumelanogenesis. Brown/black eumelanin is an effective filter against ultraviolet radiation (UVR) and is a scavenger of free radicals. Several polymorphic variants of MC1R are frequent in red-head people. These polymorphisms reduce the ability of MC1R to promote eumelanogenesis after its activation and spontaneous pheomelanogenesis take place. Since pheomelanin can act as an endogenous photosensitizer, people carrying MC1R polymorphisms are more susceptible to skin cancer. Here, we summarize current knowledge on the biology of MC1R beyond its ability to drive eumelanogenesis. We analyze its capacity to cope with oxidative insult and consequent DNA damage. We describe its ability to transduce through different pathways. We start from the canonical pathway, the cAMP/protein kinase A (PKA) pathway mainly involved in promoting eumelanogenesis, and protection from oxidative damage, and we then move on to describe more recent knowledge concerning ERK pathways, phosphoinositide 3-kinase (PI3K) pathway/AKT, and α-MSH/Peroxisome proliferators activated receptor-γ (PPAR-γ) connection. We describe MC1R polymorphic variants associated with melanoma risk which represent an open window of clinical relevance.
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Affiliation(s)
- Cecilia Herraiz
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain
| | - Idoya Martínez-Vicente
- Department of Biochemistry, Molecular Biology and Immunology, School of Medicine, University of Murcia and Instituto Murciano de Investigación Biosanitaria (IMIB), Murcia, Spain
| | - Vittoria Maresca
- Laboratory of Cutaneous Physiopathology, San Gallicano Dermatological Institute IRCCS, Rome, Italy
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28
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Douki T. Wavelengths and temporal effects on the response of mammalian cells to UV radiation: Limitations of action spectra illustrated by genotoxicity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2021; 217:112169. [PMID: 33713895 DOI: 10.1016/j.jphotobiol.2021.112169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 02/19/2021] [Accepted: 02/24/2021] [Indexed: 01/17/2023]
Abstract
All photobiological events depend on the wavelength of the incident radiation. In real-life situations and in the vast majority of laboratory experiments, exposure always involves sources with various emission spectra spreading over a wide wavelength range. Action spectra are often used to describe the efficiency of a process at different wavelengths and to predict the effects of a given light source by summation of the individual effects at each wavelength. However, a full understanding of the biological effects of complex sources requires more than considering these concomitant events at each specific wavelength. Indeed, photons of different energies may not have additive but synergistic or inhibitory effects on photochemical processes and cellular responses. The evolution of a photobiological response with post-irradiation time must also be considered. These two aspects may represent some limitations to the use of action spectra. The present review, focused on mammalian cells, illustrates the concept of action spectrum and discusses its drawbacks using theoretical considerations and examples taken from the literature. Emphasis is placed on genotoxicity for which wavelength effects have been extensively studied. Other effects of UV exposure are also mentioned.
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Affiliation(s)
- Thierry Douki
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38000 Grenoble, France.
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29
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Fajuyigbe D, Douki T, Dijk A, Sarkany RPE, Young AR. Dark cyclobutane pyrimidine dimers are formed in the epidermis of Fitzpatrick skin types I/II and VI in vivo after exposure to solar‐simulated radiation. Pigment Cell Melanoma Res 2021; 34:575-584. [DOI: 10.1111/pcmr.12956] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 11/20/2020] [Accepted: 12/11/2020] [Indexed: 12/17/2022]
Affiliation(s)
| | | | | | | | - Antony R. Young
- St John’s Institute of Dermatology King’s College London London UK
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30
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Banaś AK, Zgłobicki P, Kowalska E, Bażant A, Dziga D, Strzałka W. All You Need Is Light. Photorepair of UV-Induced Pyrimidine Dimers. Genes (Basel) 2020; 11:E1304. [PMID: 33158066 PMCID: PMC7694213 DOI: 10.3390/genes11111304] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 10/27/2020] [Accepted: 10/27/2020] [Indexed: 12/18/2022] Open
Abstract
Although solar light is indispensable for the functioning of plants, this environmental factor may also cause damage to living cells. Apart from the visible range, including wavelengths used in photosynthesis, the ultraviolet (UV) light present in solar irradiation reaches the Earth's surface. The high energy of UV causes damage to many cellular components, with DNA as one of the targets. Putting together the puzzle-like elements responsible for the repair of UV-induced DNA damage is of special importance in understanding how plants ensure the stability of their genomes between generations. In this review, we have presented the information on DNA damage produced under UV with a special focus on the pyrimidine dimers formed between the neighboring pyrimidines in a DNA strand. These dimers are highly mutagenic and cytotoxic, thus their repair is essential for the maintenance of suitable genetic information. In prokaryotic and eukaryotic cells, with the exception of placental mammals, this is achieved by means of highly efficient photorepair, dependent on blue/UVA light, which is performed by specialized enzymes known as photolyases. Photolyase properties, as well as their structure, specificity and action mechanism, have been briefly discussed in this paper. Additionally, the main gaps in our knowledge on the functioning of light repair in plant organelles, its regulation and its interaction between different DNA repair systems in plants have been highlighted.
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Affiliation(s)
- Agnieszka Katarzyna Banaś
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Piotr Zgłobicki
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Ewa Kowalska
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Aneta Bażant
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
| | - Dariusz Dziga
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland;
| | - Wojciech Strzałka
- Department of Plant Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland; (A.K.B.); (P.Z.); (E.K.); (A.B.)
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31
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Wang YQ, Yang YS, Chen J, Liu MH, Chen GQ, Huang Y. FAM122A maintains DNA stability possibly through the regulation of topoisomerase IIα expression. Exp Cell Res 2020; 396:112242. [PMID: 32866497 DOI: 10.1016/j.yexcr.2020.112242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/31/2020] [Accepted: 08/19/2020] [Indexed: 12/22/2022]
Abstract
FAM122A is a housekeeping gene and highly conserved in mammals. More recently, we have demonstrated that FAM122A is essential for maintaining the growth of hepatocellular carcinoma cells, in which we unexpectedly found that FAM122A deletion increases γH2AX protein level, suggesting that FAM122A may participate in the regulation of DNA homeostasis or stability. In this study, we continued to investigate the potential role of FAM122A in DNA damage and/or repair. We found that CRISPR/Cas9-mediated FAM122A deletion enhances endogenous DNA damages in cancer cells but not in normal cells, demonstrating a significant increase in γH2AX protein and foci formation of γH2AX and 53BP1, as well as DNA breaks by comet assay. Further, we found that FAM122A deletion greatly increases TOP2α protein level, and significantly and specifically enhances TOP2 poisons (etoposide and doxorubicin)-induced DNA damage effects in cancer cells. Moreover, FAM122A is found to be interacted with TOP2α, instead of TOP2β. However, FAM122A knockout doesn't affect the intracellular ROS levels and the process of DNA repair after removal of etoposide with short-term stimulation, suggesting that FAM122A deletion-enhanced DNA damage does not result from endogenous overproduction of ROS and/or impairment of DNA repair ability. Collectively, our study provides the first demonstration that FAM122A is critical for maintaining DNA stability probably by modulating TOP2α protein, and FAM122A deletion combined with TOP2-targeted drugs may represent a potential novel chemotherapeutic strategy for cancer patients.
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Affiliation(s)
- Yin-Qi Wang
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, and Chinese Academy of Medical Sciences Research Unit, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yun-Sheng Yang
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, and Chinese Academy of Medical Sciences Research Unit, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jing Chen
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, and Chinese Academy of Medical Sciences Research Unit, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Man-Hua Liu
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, and Chinese Academy of Medical Sciences Research Unit, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guo-Qiang Chen
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, and Chinese Academy of Medical Sciences Research Unit, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying Huang
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, and Chinese Academy of Medical Sciences Research Unit, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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32
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Piccinni V, Reiter S, Keefer D, de Vivie-Riedle R. Multiscale Conformational Sampling Reveals Excited-State Locality in DNA Self-Repair Mechanism. J Phys Chem A 2020; 124:9133-9140. [PMID: 33089694 DOI: 10.1021/acs.jpca.0c07207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ultraviolet (UV) irradiation is known to be responsible for DNA damage. However, experimental studies in DNA oligonucleotides have shown that UV light can also induce sequence-specific self-repair. Following charge transfer from a guanine adenine sequence adjacent to a cyclobutane pyrimidine dimer (CPD), the covalent bond between the two thymines could be cleaved, recovering the intact base sequence. Mechanistic details promoting the self-repair remained unclear, however. In our theoretical study, we investigated whether optical excitation could directly lead to a charge-transfer state, thereby initiating the repair, or whether the initial excited state remains localized on a single nucleobase. We performed conformational sampling of 200 geometries of the damaged DNA double strand solvated in water and used a hybrid quantum and molecular mechanics approach to compute excited states at the complete active space perturbation level of theory. Analysis of the conformational data set clearly revealed that the excited-state properties are uniformly distributed across the fluctuations of the nucleotide in its natural environment. From the electronic wavefunction, we learned that the electronic transitions remained predominantly local on either adenine or guanine, and no direct charge transfer occurred in the experimentally accessed energy range. The investigated base sequence is not only specific to the CPD repair mechanism but ubiquitously occurs in nucleic acids. Our results therefore give a very general insight into the charge locality of UV-excited DNA, a property that is regarded to have determining relevance in the structural consequences following absorption of UV photons.
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Affiliation(s)
- Viviana Piccinni
- Department Chemie, Ludwig-Maximilians-Universität München, München D-81377, Germany
| | - Sebastian Reiter
- Department Chemie, Ludwig-Maximilians-Universität München, München D-81377, Germany
| | - Daniel Keefer
- Department Chemie, Ludwig-Maximilians-Universität München, München D-81377, Germany
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Kciuk M, Marciniak B, Mojzych M, Kontek R. Focus on UV-Induced DNA Damage and Repair-Disease Relevance and Protective Strategies. Int J Mol Sci 2020; 21:ijms21197264. [PMID: 33019598 PMCID: PMC7582305 DOI: 10.3390/ijms21197264] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 02/06/2023] Open
Abstract
The protective ozone layer is continually depleting due to the release of deteriorating environmental pollutants. The diminished ozone layer contributes to excessive exposure of cells to ultraviolet (UV) radiation. This leads to various cellular responses utilized to restore the homeostasis of exposed cells. DNA is the primary chromophore of the cells that absorbs sunlight energy. Exposure of genomic DNA to UV light leads to the formation of multitude of types of damage (depending on wavelength and exposure time) that are removed by effectively working repair pathways. The aim of this review is to summarize current knowledge considering cellular response to UV radiation with special focus on DNA damage and repair and to give a comprehensive insight for new researchers in this field. We also highlight most important future prospects considering application of the progressing knowledge of UV response for the clinical control of diverse pathologies.
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Affiliation(s)
- Mateusz Kciuk
- Doctoral School of Exact and Natural Sciences, University of Lodz, Banacha Street 12/16, 90-237 Lodz, Poland
- Department of Molecular Biotechnology and Genetics, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha St., 90-237 Lodz, Poland; (B.M.); (R.K.)
- Correspondence:
| | - Beata Marciniak
- Department of Molecular Biotechnology and Genetics, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha St., 90-237 Lodz, Poland; (B.M.); (R.K.)
| | - Mariusz Mojzych
- Department of Chemistry, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, 08-110 Siedlce, Poland;
| | - Renata Kontek
- Department of Molecular Biotechnology and Genetics, Faculty of Biology and Environmental Protection, University of Lodz, 12/16 Banacha St., 90-237 Lodz, Poland; (B.M.); (R.K.)
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Pendyala B, Patras A, Pokharel B, D'Souza D. Genomic Modeling as an Approach to Identify Surrogates for Use in Experimental Validation of SARS-CoV-2 and HuNoV Inactivation by UV-C Treatment. Front Microbiol 2020; 11:572331. [PMID: 33133042 PMCID: PMC7550400 DOI: 10.3389/fmicb.2020.572331] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 09/08/2020] [Indexed: 01/25/2023] Open
Abstract
Severe Acute Respiratory Syndrome coronavirus-2 (SARS-CoV-2) is responsible for the COVID-19 pandemic that continues to pose significant public health concerns. While research to deliver vaccines and antivirals are being pursued, various effective technologies to control its environmental spread are also being targeted. Ultraviolet light (UV-C) technologies are effective against a broad spectrum of microorganisms when used even on large surface areas. In this study, we developed a pyrimidine dinucleotide frequency based genomic model to predict the sensitivity of select enveloped and non-enveloped viruses to UV-C treatments in order to identify potential SARS-CoV-2 and human norovirus surrogates. The results revealed that this model was best fitted using linear regression with r 2 = 0.90. The predicted UV-C sensitivity (D 90 - dose for 90% inactivation) for SARS-CoV-2 and MERS-CoV was found to be 21.5 and 28 J/m2, respectively (with an estimated 18 J/m2 obtained from published experimental data for SARS-CoV-1), suggesting that coronaviruses are highly sensitive to UV-C light compared to other ssRNA viruses used in this modeling study. Murine hepatitis virus (MHV) A59 strain with a D 90 of 21 J/m2 close to that of SARS-CoV-2 was identified as a suitable surrogate to validate SARS-CoV-2 inactivation by UV-C treatment. Furthermore, the non-enveloped human noroviruses (HuNoVs), had predicted D 90 values of 69.1, 89, and 77.6 J/m2 for genogroups GI, GII, and GIV, respectively. Murine norovirus (MNV-1) of GV with a D 90 = 100 J/m2 was identified as a potential conservative surrogate for UV-C inactivation of these HuNoVs. This study provides useful insights for the identification of potential non-pathogenic (to humans) surrogates to understand inactivation kinetics and their use in experimental validation of UV-C disinfection systems. This approach can be used to narrow the number of surrogates used in testing UV-C inactivation of other human and animal ssRNA viral pathogens for experimental validation that can save cost, labor and time.
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Affiliation(s)
- Brahmaiah Pendyala
- Department of Agricultural and Environmental Sciences, Food Science Program, College of Agriculture, Tennessee State University, Nashville, TN, United States
| | - Ankit Patras
- Department of Agricultural and Environmental Sciences, Food Science Program, College of Agriculture, Tennessee State University, Nashville, TN, United States
| | - Bharat Pokharel
- Department of Agricultural and Environmental Sciences, Food Science Program, College of Agriculture, Tennessee State University, Nashville, TN, United States
| | - Doris D'Souza
- Department of Food Science, University of Tennessee, Knoxville, Knoxville, TN, United States
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Giussani A, Worth GA. On the Intrinsically Low Quantum Yields of Pyrimidine DNA Photodamages: Evaluating the Reactivity of the Corresponding Minimum Energy Crossing Points. J Phys Chem Lett 2020; 11:4984-4989. [PMID: 32490676 DOI: 10.1021/acs.jpclett.0c01264] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The low quantum yield of photoformation of cyclobutane pyrimidine dimers and pyrimidine-pyrimidone (6-4) adducts in DNA bases is usually associated with the presence of more favorable nonreactive decay paths and with the unlikeliness of exciting the system in a favorable conformation. Here, we prove that the ability of the reactive conical intersection to bring the system either back to the absorbing conformation or to the photoproduct must be considered as a fundamental factor in the low quantum yields of the mentioned photodamage. In support of the proposed model, the one order of magnitude difference in the quantum yield of formation of the cyclobutane thymine dimer with respect to the thymine-thymine (6-4) adduct is rationalized here by comparing the reactive ability of the seam of intersections leading respectively to the cyclobutane thymine dimer and the oxetane precursor of the thymine-thymine (6-4) adduct at the CASPT2 level of theory.
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Affiliation(s)
- Angelo Giussani
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Graham A Worth
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
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Maeda J, Allum AJ, Mussallem JT, Froning CE, Haskins AH, Buckner MA, Miller CD, Kato TA. Ascorbic Acid 2-Glucoside Pretreatment Protects Cells from Ionizing Radiation, UVC, and Short Wavelength of UVB. Genes (Basel) 2020; 11:genes11030238. [PMID: 32106443 PMCID: PMC7140853 DOI: 10.3390/genes11030238] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/15/2020] [Accepted: 02/20/2020] [Indexed: 12/21/2022] Open
Abstract
Ascorbic acid 2-glucoside (AA2G), glucosylated ascorbic acid (AA), has superior properties for bioavailability and stability compared to AA. Although AA2G has shown radioprotective properties similar to AA, effects for UV light, especially UVC and UVB, are not studied. AA2G was tested for cytotoxicity and protective effects against ionizing radiation, UVC, and broadband and narrowband UVB in Chinese hamster ovary (CHO) cells and compared to AA and dimethyl sulfoxide (DMSO). Pretreatment with DMSO, AA, and AA2G showed comparative protective effects in CHO wild type and radiosensitive xrs5 cells for cell death against ionizing radiation with reducing the number of radiation-induced DNA damages. Pretreatment with AA and AA2G protected CHO wild type and UV sensitive UV135 cells from UVC and broadband UV, but not from narrowband UVB. DMSO showed no protective effects against tested UV. The UV filtration effects of AA and AA2G were analyzed with a spectrometer and spectroradiometer. AA and AA2G blocked UVC and reduced short wavelengths of UVB, but had no effect on wavelengths above 300nm. These results suggest that AA2G protects cells from radiation by acting as a radical scavenger to reduce initial DNA damage, as well as protecting cells from certain UVB wavelengths by filtration.
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Douki T. Pyrimidine (6‐4) Pyrimidone Photoproducts in UVA‐Irradiated DNA: Photosensitization or Photoisomerization? CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900280] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Thierry Douki
- Univ. Grenoble Alpes CEA, CNRS, IRIG, SyMMES 38000 Grenoble France
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Zhang N, Deng W, Li Y, Ma Y, Liu Y, Li X, Wang H. Formic Acid of ppm Enhances LC-MS/MS Detection of UV Irradiation-Induced DNA Dimeric Photoproducts. Anal Chem 2019; 92:1197-1204. [PMID: 31786915 DOI: 10.1021/acs.analchem.9b04327] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclobutane pyrimidine dimers (CPDs) and pyrimidine (6-4) pyrimidone photoproducts (6-4PPs) are genotoxic DNA lesions and mainly generated on thymine-thymine (T-T) dinucleotides upon UV irradiation. Regarding the sensitivity, specificity, and accuracy of analytical methods, it is of first choice to develop a reliable assay for simultaneous detection of these DNA lesions using liquid chromatography-tandem mass spectrometry (LC-MS/MS). However, the dilemma is the low detection sensitivity of the phosphate-containing dimeric photoproducts even using most favorable negative-ion mode for LC-MS/MS analysis. Unexpectedly, we observed that the detection sensitivity of T-T CPD and 6-4PP could be significantly improved using formic acid/acetic acid (∼ppm) as an additive of the mobile phase for reversed-phase LC-MS/MS analysis. This is the first demonstration of the enhancement of LC-MS/MS signals by formic acid/acetic acid in negative-ion mode. Of note, these acidic agents are often used for positive-ion mode in LC-MS assays. Benefited from the developed method, we could quantify both T-T CPD and 6-4PP in mouse embryonic stem cells upon UVC irradiation at low dosage. This sensitive method is applicable to the screening and identification of genes involved in formation, signaling, and repair of UV lesion.
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Affiliation(s)
- Ning Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085 , China
| | - Wenchao Deng
- Institute of Environment and Health , Jianghan University , Wuhan 430056 , China
| | - Yao Li
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Yangde Ma
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Yan Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xiangjun Li
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Hailin Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology , Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085 , China.,Institute of Environment and Health , Jianghan University , Wuhan 430056 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
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von Koschembahr A, Youssef A, Béal D, Gudimard L, Giot JP, Douki T. Toxicity and DNA repair in normal human keratinocytes co-exposed to benzo[a]pyrene and sunlight. Toxicol In Vitro 2019; 63:104744. [PMID: 31836489 DOI: 10.1016/j.tiv.2019.104744] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/21/2019] [Accepted: 12/06/2019] [Indexed: 12/28/2022]
Abstract
Skin has the potential to be exposed to both solar UV radiation and polycyclic aromatic hydrocarbons, especially in occupational environments. In the present work, we investigated how benzo[a]pyrene (B[a]P) modulates cellular phototoxicity and impacts formation and repair of pyrimidine dimers induced by simulated sunlight (SSL) in normal human keratinocytes (NHK). We were especially interested in determining whether the aryl hydrocarbon receptor (AhR) was involved since it was recently shown to negatively impact repair. Addition of 1 μM B[a]P after exposure to 2 minimal erythemal doses of SSL had little impact on NHK. The inverse protocol involving incubation with B[a]P followed by irradiation led to a strong increase in phototoxicity. Repair of DNA photoproducts was drastically impaired. Using agonists and antagonists of AhR allowed us to conclude that this factor was not involved in these results. Observation of a strong increase in the level of the oxidative marker 8-oxo-7,8-dihydroguanine in the protocol involving B[a]P treatment followed by exposure to SSL strongly suggested that a photosensitized oxidative stress was responsible for cell death and inhibition of DNA repair. Accordingly, both adverse effects were diminished with a lower concentration of B[a]P and a lower SSL dose, leading to less oxidative stress.
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Affiliation(s)
- Anne von Koschembahr
- Univ. Grenoble Alpes, SyMMES/CIBEST UMR 5819 UGA-CNRS-CEA, INAC/CEA-Grenoble LAN, F-38000 Grenoble, France
| | - Antonia Youssef
- Univ. Grenoble Alpes, SyMMES/CIBEST UMR 5819 UGA-CNRS-CEA, INAC/CEA-Grenoble LAN, F-38000 Grenoble, France
| | - David Béal
- Univ. Grenoble Alpes, SyMMES/CIBEST UMR 5819 UGA-CNRS-CEA, INAC/CEA-Grenoble LAN, F-38000 Grenoble, France
| | - Leslie Gudimard
- Univ. Grenoble Alpes, SyMMES/CIBEST UMR 5819 UGA-CNRS-CEA, INAC/CEA-Grenoble LAN, F-38000 Grenoble, France
| | - Jean-Philippe Giot
- Service de Chirurgie Plastique et Maxillo-faciale, Centre Hospitalier Universitaire Grenoble Alpes, La Tronche, France
| | - Thierry Douki
- Univ. Grenoble Alpes, SyMMES/CIBEST UMR 5819 UGA-CNRS-CEA, INAC/CEA-Grenoble LAN, F-38000 Grenoble, France.
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40
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Gontcharov J, Liu L, Pilles BM, Carell T, Schreier WJ, Zinth W. Triplet-Induced Lesion Formation at CpT and TpC Sites in DNA. Chemistry 2019; 25:15164-15172. [PMID: 31538684 PMCID: PMC6899856 DOI: 10.1002/chem.201903573] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Indexed: 12/22/2022]
Abstract
UV irradiation induces DNA lesions particularly at dipyrimidine sites. Using time-resolved UV pump (250 nm) and mid-IR probe spectroscopy the triplet pathway of cyclobutane pyrimidine dimer (CPD) formation within TpC and CpT sequences was studied. The triplet state is initially localized at the thymine base but decays with 30 ns under formation of a biradical state extending over both bases of the dipyrimidine. Subsequently this state either decays back to the electronic ground state on the 100 ns time scale or forms a cyclobutane pyrimidine dimer lesion (CPD). Stationary IR spectroscopy and triplet sensitization via 2'-methoxyacetophenone (2-M) in the UVA range shows that the lesions are formed with an efficiency of approximately 1.5 %. Deamination converts the cytosine moiety of the CPD lesions on the time scale of 10 hours into uracil which gives CPD(UpT) and CPD(TpU) lesions in which the coding potential of the initial cytosine base is vanished.
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Affiliation(s)
- Julia Gontcharov
- Lehrstuhl für BioMolekulare OptikFakultät für Physik and Center for Integrated Protein Science Munich CIPSMLudwig-Maximilians-Universität MünchenOettingenstr. 6780538MünchenGermany
| | - Lizhe Liu
- Lehrstuhl für BioMolekulare OptikFakultät für Physik and Center for Integrated Protein Science Munich CIPSMLudwig-Maximilians-Universität MünchenOettingenstr. 6780538MünchenGermany
| | - Bert M. Pilles
- Lehrstuhl für BioMolekulare OptikFakultät für Physik and Center for Integrated Protein Science Munich CIPSMLudwig-Maximilians-Universität MünchenOettingenstr. 6780538MünchenGermany
| | - Thomas Carell
- Center for Integrated Protein Science am Department ChemistryLudwig-Maximilians-Universität MünchenButenandtstraße 5–1381377MünchenGermany
| | - Wolfgang J. Schreier
- Lehrstuhl für BioMolekulare OptikFakultät für Physik and Center for Integrated Protein Science Munich CIPSMLudwig-Maximilians-Universität MünchenOettingenstr. 6780538MünchenGermany
| | - Wolfgang Zinth
- Lehrstuhl für BioMolekulare OptikFakultät für Physik and Center for Integrated Protein Science Munich CIPSMLudwig-Maximilians-Universität MünchenOettingenstr. 6780538MünchenGermany
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41
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Coantic-Castex S, Martinez A, Harakat D, Guillaume D, Clivio P. The remarkable UV light invulnerability of thymine GNA dinucleotides. Chem Commun (Camb) 2019; 55:12571-12574. [PMID: 31577282 DOI: 10.1039/c9cc04355a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We herein demonstrate the UV resistance of glycol nucleic acid (GNA) dinucleotides. This resistance sustains the hypothesis of GNA as a nucleic acid prebiotic ancestor on early Earth, a time of intense solar UV light. Such photorobustness, due to the absence of intrastrand base stacking, could offer an opportunity for nanodevice development requiring challenging UV conditions.
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Affiliation(s)
- Stéphanie Coantic-Castex
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France.
| | - Agathe Martinez
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, Bâtiment 18, Europol'Agro, BP 1039, F-51687 Reims Cedex 2, France
| | - Dominique Harakat
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR des Sciences Exactes et Naturelles, Bâtiment 18, Europol'Agro, BP 1039, F-51687 Reims Cedex 2, France
| | - Dominique Guillaume
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France.
| | - Pascale Clivio
- Université de Reims Champagne Ardenne, Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, UFR de Pharmacie, 51 rue Cognacq-Jay, F-51096 Reims Cedex, France.
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Vallejos-Almirall A, Folch-Cano C, Rosas A, Vergara C. Development of liquid chromatography tandem mass spectrometry method to quantify cyclobutane pyrimidine dimer photolyase activity by detection of 15mer oligonucleotide as reaction product. J Chromatogr A 2019; 1611:460577. [PMID: 31591040 DOI: 10.1016/j.chroma.2019.460577] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 06/11/2019] [Accepted: 09/26/2019] [Indexed: 11/15/2022]
Abstract
Ultraviolet radiation from sunlight causes DNA damage in skin cells by formation of photoproducts, mainly cyclobutane pyrimidine dimers (CPD), which are reverted by exogenous CPD-photolyase, preventing photoaging and skin cancer. High performance liquid chromatography tandem mass spectrometry method for quantification of CPD-photolyase activity was developed to search new enzymes sources for dermatology or clinical studies. The method was based in the enzymatic conversion of a 15mer oligonucleotide, containing a center cyclobutane thymidine dimer, to the restored 15mer oligonucleotide. Three ion pair reagent were evaluated by response surface methodology to increase mass intensities. Additionally, chromatographic separation of oligonucleotides was performed. The selected mobile phase was 15 mM diisopropylethylamine/20 mM hexafluoroisopropanol in methanol. The method allowed total separation between the oligonucleotides studied (resolution of 2.3) by using the core shell technology, which reduce the diffusion time of the analyte into the column, increasing the efficiency and minimizing the analysis time at 7 min. The mass spectrometry detection allowed a high selectivity and sensitivity. This is the first time where MRM modality has been employed with this specific purpose. Oligonucleotides recovery from reaction mixture was ∼ 94% and the limit of quantification was 13.4 nM for 15mer. The method was evaluated with a recombinant CPD-photolyase from Synechococcus leopoliensis using purified and crude protein extract. CPD-photolyase could be measured in terms of activity for enzymatic kinetics studies, for evaluation of UV-R effects in (micro)organisms and to identify new enzymes.
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Affiliation(s)
- A Vallejos-Almirall
- Departamento de Suelos y Recursos Naturales, Facultad de Agronomía, Universidad de Concepción, Chillán, Chile; Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile
| | - C Folch-Cano
- Departamento de Agroindustrias, Facultad de Ingeniería Agrícola, Universidad de Concepción, Chillán, Chile
| | - A Rosas
- Departamento de Suelos y Recursos Naturales, Facultad de Agronomía, Universidad de Concepción, Chillán, Chile
| | - C Vergara
- Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile.
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Marionnet C, Bernerd F. In Vitro Skin Models for the Evaluation of Sunscreen-Based Skin Photoprotection: Molecular Methodologies and Opportunities. Curr Med Chem 2019; 26:1874-1890. [DOI: 10.2174/0929867324666170303124247] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/13/2017] [Accepted: 03/02/2017] [Indexed: 12/18/2022]
Abstract
Identifying and understanding the biological events that occur following ultraviolet
(UV) exposure are mandatory to elucidate the biological and clinical consequences of sun exposure,
and to provide efficient and adequate photoprotection strategies. The main UVinduced
biological features (markers related to sunburn, cancer, photoaging immunosuppression,
pigmentation), characterized in human skin in vivo, could be reproduced in adapted
models of reconstructed skin in vitro, attesting their high relevance in the field of photobiology.
In turn, 3D skin models were useful to discover precise biological pathways involved in
UV response and were predictive of in vivo situation. Although they did not follow a strict
validation process for the determination of protection factors, they enabled to evidence important
concepts in photoprotection. Indeed, the use of reconstructed skin model highlighted the
importance of broad spectrum sunscreen use to protect essential cellular functions, and biologically
proved that SPF value was not predictive of the level of protection in the UVA
wavelength domain. New biological approaches, such as transcriptomic or proteomic studies
as well as quantitative and qualitative determination of DNA damage, will indisputably increase
the added value of such systems for sunscreen efficiency evaluation.
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Michaelian K, Padilla NS. UVC photon-induced denaturing of DNA: A possible dissipative route to Archean enzyme-less replication. Heliyon 2019; 5:e01902. [PMID: 31249892 PMCID: PMC6584779 DOI: 10.1016/j.heliyon.2019.e01902] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 04/16/2019] [Accepted: 05/31/2019] [Indexed: 01/01/2023] Open
Abstract
Non-equilibrium thermodynamics is a relevant framework from within which to address formidable difficulties encountered in explaining the origin of life; from molecular synthesis and complexation, enzyme-less proliferation, to evolution (including the acquisition of homochirality and information). From within this framework we have proposed that the origin of life was the origin of the dissipative structuring of organic pigments which became the fundamental molecules of life (e.g. RNA and DNA) proliferated through autocatalytic photochemical reactions under the thermodynamic imperative of dissipating the imposed UVC solar photon flux available at the Archean surface. Here we present experimental evidence demonstrating that the absorption and dissipation of UVC light by synthetic DNA of 25 base pairs (and also natural salmon sperm DNA) over a range of temperatures, including below their melting temperature, leads to denaturing. Since denaturing is a non-trivial step on route to enzyme-less replication, our data suggest the possibility of a dissipative route to DNA replication at the origin of life. Such a dissipation-replication relation provides a simple mechanism for the early accumulation of both homochirality and information. Possible mechanisms of UVC photon-induced denaturing of DNA are discussed.
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Affiliation(s)
- Karo Michaelian
- Department of Nuclear Physics and Application of Radiation, Institute of Physics, UNAM, Cto. Interior de la Investigación Científica, Ciudad Universitaria, Cuidad de México, C.P. 04510, Mexico
| | - Norberto Santillán Padilla
- Faculty of Science, UNAM, Cto. Interior de la Investigación Científica, Ciudad Universitaria, Cuidad de México, C.P. 04510, Mexico
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Belmouaddine H, Madugundu GS, Wagner JR, Couairon A, Houde D, Sanche L. DNA Base Modifications Mediated by Femtosecond Laser-Induced Cold Low-Density Plasma in Aqueous Solutions. J Phys Chem Lett 2019; 10:2753-2760. [PMID: 31039309 DOI: 10.1021/acs.jpclett.9b00652] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Applications based on near-infrared femtosecond laser-induced plasma in biological materials involve numerous ionization events that inevitably mediate physicochemical effects. Here, the physical chemistry underlying the action of such plasma is characterized in a system of biological interest. We have implemented wavefront shaping techniques to control the generation of laser-induced low electron density plasma channels in DNA aqueous solutions, which minimize the unwanted thermo-mechanical effects associated with plasma of higher density. The number of DNA base modifications per unit of absolute energy deposited by such cold plasma is compared to those induced by either ultraviolet or standard ionizing radiation (γ-rays). Analyses of various photoinduced, oxidative, and reductive DNA base products show that the effects of laser-induced cold plasma are mainly mediated by reactive radical species produced upon the ionization of water, rather than by the direct interaction of the strong laser field with DNA. In the plasma environment, reactions among densely produced primary radicals result in a dramatic decrease in the yields of DNA damages relative to sparse ionizing radiation. This intense radical production also drives the local depletion of oxygen.
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Affiliation(s)
- Hakim Belmouaddine
- Department of Nuclear Medicine and Radiobiology , Faculty of Medicine and Health Sciences, University of Sherbrooke , Sherbrooke , Quebec J1H 5N4 , Canada
| | - Guru S Madugundu
- Department of Nuclear Medicine and Radiobiology , Faculty of Medicine and Health Sciences, University of Sherbrooke , Sherbrooke , Quebec J1H 5N4 , Canada
| | - J Richard Wagner
- Department of Nuclear Medicine and Radiobiology , Faculty of Medicine and Health Sciences, University of Sherbrooke , Sherbrooke , Quebec J1H 5N4 , Canada
| | - Arnaud Couairon
- CPHT, CNRS, Ecole polytechnique, IP Paris , F-91128 Palaiseau , France
| | - Daniel Houde
- Department of Nuclear Medicine and Radiobiology , Faculty of Medicine and Health Sciences, University of Sherbrooke , Sherbrooke , Quebec J1H 5N4 , Canada
| | - Léon Sanche
- Department of Nuclear Medicine and Radiobiology , Faculty of Medicine and Health Sciences, University of Sherbrooke , Sherbrooke , Quebec J1H 5N4 , Canada
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Fu F, Liao K, Ma J, Cheng Z, Zheng D, Gao L, Liu C, Li S, Li W. How intermolecular interactions influence electronic absorption spectra: insights from the molecular packing of uracil in condensed phases. Phys Chem Chem Phys 2019; 21:4072-4081. [DOI: 10.1039/c8cp06152a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Intermolecular interactions in terms of molecular packing are crucial for the investigation of the absorption spectra of uracil in different environments.
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Affiliation(s)
- Fangjia Fu
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Kang Liao
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Jing Ma
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Zheng Cheng
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Dong Zheng
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Liuzhou Gao
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Chungen Liu
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Shuhua Li
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
| | - Wei Li
- School of Chemistry and Chemical Engineering
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- Nanjing University
- Nanjing
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Cadet J, Douki T. Formation of UV-induced DNA damage contributing to skin cancer development. Photochem Photobiol Sci 2018; 17:1816-1841. [PMID: 29405222 DOI: 10.1039/c7pp00395a] [Citation(s) in RCA: 211] [Impact Index Per Article: 35.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
UV-induced DNA damage plays a key role in the initiation phase of skin cancer. When left unrepaired or when damaged cells are not eliminated by apoptosis, DNA lesions express their mutagneic properties, leading to the activation of proto-oncogene or the inactivation of tumor suppression genes. The chemical nature and the amount of DNA damage strongly depend on the wavelength of the incident photons. The most energetic part of the solar spectrum at the Earth's surface (UVB, 280-320 nm) leads to the formation of cyclobutane pyrimidine dimers (CPDs) and pyrimidine (6-4) pyrimidone photoproducts (64PPs). Less energetic but 20-times more intense UVA (320-400 nm) also induces the formation of CPDs together with a wide variety of oxidatively generated lesions such as single strand breaks and oxidized bases. Among those, 8-oxo-7,8-dihydroguanine (8-oxoGua) is the most frequent since it can be produced by several mechanisms. Data available on the respective yield of DNA photoproducts in cells and skin show that exposure to sunlight mostly induces pyrimidine dimers, which explains the mutational signature found in skin tumors, with lower amounts of 8-oxoGua and strand breaks. The present review aims at describing the basic photochemistry of DNA and discussing the quantitative formation of the different UV-induced DNA lesions reported in the literature. Additional information on mutagenesis, repair and photoprotection is briefly provided.
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Affiliation(s)
- Jean Cadet
- Département de Médecine Nucléaire et Radiobiologie, Faculté de Médecine, 3001 12e Avenue Nord, Université de Sherbrooke, Sherbrooke, Québec JIH 5N4, Canada.
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48
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Ikehata H. Mechanistic considerations on the wavelength-dependent variations of UVR genotoxicity and mutagenesis in skin: the discrimination of UVA-signature from UV-signature mutation. Photochem Photobiol Sci 2018; 17:1861-1871. [PMID: 29850669 DOI: 10.1039/c7pp00360a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Ultraviolet radiation (UVR) predominantly induces UV-signature mutations, C → T and CC → TT base substitutions at dipyrimidine sites, in the cellular and skin genome. I observed in our in vivo mutation studies of mouse skin that these UVR-specific mutations show a wavelength-dependent variation in their sequence-context preference. The C → T mutation occurs most frequently in the 5'-TCG-3' sequence regardless of the UVR wavelength, but is recovered more preferentially there as the wavelength increases, resulting in prominent occurrences exclusively in the TCG sequence in the UVA wavelength range, which I will designate as a "UVA signature" in this review. The preference of the UVB-induced C → T mutation for the sequence contexts shows a mixed pattern of UVC- and UVA-induced mutations, and a similar pattern is also observed for natural sunlight, in which UVB is the most genotoxic component. In addition, the CC → TT mutation hardly occurs at UVA1 wavelengths, although it is detected rarely but constantly in the UVC and UVB ranges. This wavelength-dependent variation in the sequence-context preference of the UVR-specific mutations could be explained by two different photochemical mechanisms of cyclobutane pyrimidine dimer (CPD) formation. The UV-signature mutations observed in the UVC and UVB ranges are known to be caused mainly by CPDs produced through the conventional singlet/triplet excitation of pyrimidine bases after the direct absorption of the UVC/UVB photon energy in those bases. On the other hand, a novel photochemical mechanism through the direct absorption of the UVR energy to double-stranded DNA, which is called "collective excitation", has been proposed for the UVA-induced CPD formation. The UVA photons directly absorbed by DNA produce CPDs with a sequence context preference different from that observed for CPDs caused by the UVC/UVB-mediated singlet/triplet excitation, causing CPD formation preferentially at thymine-containing dipyrimidine sites and probably also preferably at methyl CpG-associated dipyrimidine sites, which include the TCG sequence. In this review, I present a mechanistic consideration on the wavelength-dependent variation of the sequence context preference of the UVR-specific mutations and rationalize the proposition of the UVA-signature mutation, in addition to the UV-signature mutation.
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Affiliation(s)
- Hironobu Ikehata
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan.
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Liu Y, Martínez-Fernández L, Cerezo J, Prampolini G, Improta R, Santoro F. Multistate coupled quantum dynamics of photoexcited cytosine in gas-phase: Nonadiabatic absorption spectrum and ultrafast internal conversions. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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50
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Qiao Z, Ye Y, Chang PH, Thirunarayanan D, Wigginton KR. Nucleic Acid Photolysis by UV 254 and the Impact of Virus Encapsidation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:10408-10415. [PMID: 30106282 DOI: 10.1021/acs.est.8b02308] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Determining the influence of higher order structure on UVC photolysis will help inform predictions of nucleic acid fate and microorganism inactivation. We measured the direct UV254 photolysis kinetics of four model viral genomes composed of single-stranded and double-stranded RNA (ssRNA and dsRNA, respectively), as well as single-stranded and double-stranded DNA (ssDNA and dsDNA, respectively), in ultrapure water, in phosphate buffered saline (PBS), and encapsidated in their native virus particles. The photolysis rate constants of naked nucleic acids measured by qPCR (RT-qPCR for RNA) and normalized by the number of bases measured in a particular sequence exhibited the following trend: ssDNA > ssRNA ≈ dsDNA > dsRNA. In PBS, naked ssRNA bases reacted, on average, 24× faster than the dsRNA bases, whereas naked ssDNA bases reacted 4.3× faster than dsDNA bases. Endogenous indirect photolysis involving 1O2 and ·OH was ruled out as a major contributing factor in the reactions. A comparison of our measured rate constants with rate constants reported in the literature shows a general agreement among the nucleic acid UV254 direct photolysis kinetics. Our results underscore the high resistance of dsRNA to UVC photolysis and demonstrate the role that nucleic acid structure and solution chemistry play in photoreactivity.
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Affiliation(s)
- Zhong Qiao
- Department of Civil and Environmental Engineering , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Yinyin Ye
- Department of Civil and Environmental Engineering , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Pin Hsuan Chang
- Department of Civil and Environmental Engineering , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Devibaghya Thirunarayanan
- Department of Civil and Environmental Engineering , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Krista R Wigginton
- Department of Civil and Environmental Engineering , University of Michigan , Ann Arbor , Michigan 48109 , United States
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