visible light-responsive platinum-containing titania nanoparticle-mediated photocatalysis induces nucleotide insertion, deletion and substitution mutations
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ID: 252239
2016
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Abstract
Conventional photocatalysts are primarily stimulated using ultraviolet (UV) light to elicit reactive oxygen species and have wide applications in environmental and energy fields, including self-cleaning surfaces and sterilization. Because UV illumination is hazardous to humans, visible light-responsive photocatalysts (VLRPs) were discovered and are now applied to increase photocatalysis. However, fundamental questions regarding the ability of VLRPs to trigger DNA mutations and the mutation types it elicits remain elusive. Here, through plasmid transformation and β-galactosidase α-complementation analyses, we observed that visible light-responsive platinum-containing titania (TiO2) nanoparticle (NP)-mediated photocatalysis considerably reduces the number of Escherichia coli transformants. This suggests that such photocatalytic reactions cause DNA damage. DNA sequencing results demonstrated that the DNA damage comprises three mutation types, namely nucleotide insertion, deletion and substitution; this is the first study to report the types of mutations occurring after photocatalysis by TiO2-VLRPs. Our results may facilitate the development and appropriate use of new-generation TiO2 NPs for biomedical applications.
| Reference Key |
sun2016nanomaterialsvisible
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| Authors | ;Der-Shan Sun;Yao-Hsuan Tseng;Wen-Shiang Wu;Ming-Show Wong;Hsin-Hou Chang |
| Journal | progress in neuro-psychopharmacology & biological psychiatry |
| Year | 2016 |
| DOI |
10.3390/nano7010002
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