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Markers of oxidative stress after three days of nanoTiO2 sunscreen use in humans: A pilot study
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SYSNO ASEP 0537150 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Markers of oxidative stress after three days of nanoTiO2 sunscreen use in humans: A pilot study Author(s) Pelclová, D. (CZ)
Navrátil, Tomáš (UFCH-W) RID, ORCID
Fenclová, Z. (CZ)
Vlčková, Š. (CZ)Source Title Central European Journal of Public Health. - : Státní zdravotní ústav - ISSN 1210-7778
Roč. 28, OCT 2020 (2020), s. 17-21Number of pages 5 s. Language eng - English Country CZ - Czech Republic Keywords Exhaled breath condensate ; Inflammation ; Nanoparticles absorption ; NanoTiO 2 ; Nanotoxicology ; Oxidative stress ; Sunscreen ; Urine Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000620659300004 EID SCOPUS 85093642450 DOI 10.21101/cejph.a6158 Annotation Objective: Recent experimental studies point to a high reactivity of nanoparticles and the potential of sunscreens to penetrate the skin. We measured 20 markers of oxidative stress and inflammation to find out whether skin exposure to nanoTiO2 sunscreen may elevate the level of the markers in exhaled breath condensate (EBC) and urine of exposed subjects, as was suggested by our earlier study. Methods: Six volunteers (3 males and 3 females), with a mean age of 48.0 ± 6.7 years, used commercial sunscreen for three days continuously. The first samples were collected before the test. The second samples were collected on day 4, before the sunscreen was washed off, and the third samples on day 11. The following biomarkers were measured: malondialdehyde, 4-hydroxy-trans-hexenal, 4-hydroxy-trans-nonenal, aldehydes C6-C12, 8-isoProstaglandin F2α, o-tyrosine, 3-chlorotyrosine, 3-nitrotyrosine, 8-hydroxy-2-deoxyguanosine, 8-hydroxyguanosine, 5-hydroxymethyl uracil, and leukotrienes B4, C4, D4, and E4, using liquid chromatography-electrospray ionisation-tandem mass spectrometry. Results: In the urine, 4-hydroxy-trans-hexenal was significantly higher in post-exposure sample 2, and the same trend was seen in all urinary markers. In EBC, no difference was seen between the mean values of 20 post-test markers as compared with pre-test samples. Conclusion: This study suggests potential side effects of the sunscreen – borderline elevation of markers of oxidative stress/inflammation – which may relate to the absorption of the nanoTiO2, and the non-significant difference may be explained by the small number of subjects. The effect was not seen in EBC, where nanoTiO2 was not found. A larger study is needed, as according to our previous study, the beneficial effect of the sunscreen to suppress oxidative stress caused by UV radiation may be questioned. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0314898
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