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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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Lerche CM, Frederiksen NJS, Thorsteinsson IS, Køster B, Nybo L, Flouris AD, Heydenreich J, Philipsen PA, Hædersdal M, Wulf HC, Granborg JR. Urinary thymidine dimer excretion reflects personal ultraviolet radiation exposure levels. Photochem Photobiol Sci 2024; 23:919-930. [PMID: 38589652 DOI: 10.1007/s43630-024-00563-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/11/2024] [Indexed: 04/10/2024]
Abstract
Exposure to ultraviolet radiation (UVR) leads to skin DNA damage, specifically in the form of cyclobutane pyrimidine dimers, with thymidine dimers being the most common. Quantifying these dimers can indicate the extent of DNA damage resulting from UVR exposure. Here, a new liquid chromatography-mass spectrometry (LC-MS) method was used to quantify thymidine dimers in the urine after a temporary increase in real-life UVR exposure. Healthy Danish volunteers (n = 27) experienced increased UVR exposure during a winter vacation. Individual exposure, assessed via personally worn electronic UVR dosimeters, revealed a mean exposure level of 32.9 standard erythema doses (SEDs) during the last week of vacation. Morning urine thymidine dimer concentrations were markedly elevated both 1 and 2 days post-vacation, and individual thymidine dimer levels correlated with UVR exposure during the last week of the vacation. The strongest correlation with erythema-weighted personal UVR exposure (Power model, r2 = 0.64, p < 0.001) was observed when both morning urine samples were combined to measure 48-h thymidine dimer excretion, whereas 24-h excretion based on a single sample provided a weaker correlation (Power model, r2 = 0.55, p < 0.001). Sex, age, and skin phototype had no significant effect on these correlations. For the first time, urinary thymidine dimer excretion was quantified by LC-MS to evaluate the effect of a temporary increase in personal UVR exposure in a real-life setting. The high sensitivity to elevated UVR exposure and correlation between urinary excretion and measured SED suggest that this approach may be used to quantify DNA damage and repair and to evaluate photoprevention strategies.
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Affiliation(s)
- Catharina Margrethe Lerche
- Department of Dermatology, Copenhagen University Hospital-Bispebjerg and Frederiksberg, 2400, Copenhagen, Denmark.
- Department of Pharmacy, University of Copenhagen, 2100, Copenhagen, Denmark.
| | | | | | - Brian Køster
- Department of Prevention and Information, Danish Cancer Society, 2100, Copenhagen, Denmark
| | - Lars Nybo
- Department of Nutrition, Exercise and Sports, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Andreas D Flouris
- FAME Laboratory, Department of Physical Education and Sport Science, University of Thessaly, Karies, 42100, Trikala, Greece
| | - Jakob Heydenreich
- Department of Dermatology, Copenhagen University Hospital-Bispebjerg and Frederiksberg, 2400, Copenhagen, Denmark
| | - Peter Alshede Philipsen
- Department of Dermatology, Copenhagen University Hospital-Bispebjerg and Frederiksberg, 2400, Copenhagen, Denmark
| | - Merete Hædersdal
- Department of Dermatology, Copenhagen University Hospital-Bispebjerg and Frederiksberg, 2400, Copenhagen, Denmark
| | - Hans Christian Wulf
- Department of Dermatology, Copenhagen University Hospital-Bispebjerg and Frederiksberg, 2400, Copenhagen, Denmark
| | - Jonatan Riber Granborg
- Department of Dermatology, Copenhagen University Hospital-Bispebjerg and Frederiksberg, 2400, Copenhagen, Denmark
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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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Cooke MS, Hu CW, Chao MR, Chang YJ, Rhodes LE, Evans MD. Letter to the Editor regarding "DNA photoproducts released by repair in biological fluids as biomarkers of the genotoxicity of UV radiation". Anal Bioanal Chem 2023; 415:517-519. [PMID: 36376715 DOI: 10.1007/s00216-022-04417-5] [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: 09/19/2022] [Accepted: 10/31/2022] [Indexed: 11/16/2022]
Affiliation(s)
- Marcus S Cooke
- Oxidative Stress Group, Department Cell Biology, Microbiology, and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, 33620, Tampa, USA.
| | - Chiung-Wen Hu
- Department of Public Health, Chung Shan Medical University, Taichung, 402, Taiwan
- Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung, 402, Taiwan
| | - Mu-Rong Chao
- Department of Occupational Safety and Health, Chung Shan Medical University, Taichung, 402, Taiwan
| | - Yuan-Jhe Chang
- Department of Occupational Safety and Health, Chung Shan Medical University, Taichung, 402, Taiwan
| | - Lesley E Rhodes
- NIHR Manchester Biomedical Research Centre, Division of Musculoskeletal and Dermatological Sciences, School of Biological Sciences, The University of Manchester, Manchester, UK
| | - Mark D Evans
- Leicester School of Allied Health Sciences, Faculty of Health & Life Sciences, De Montfort University, Leicester, LE1 9BH, UK
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