Comparative analysis of the relative potential of silver, zinc-oxide and titanium-dioxide nanoparticles against UVB-induced DNA damage for the prevention of skin carcinogenesis
Journal Title: | Cancer letters 2016, Vol.383 (1), p.53-61 |
Main Author: | Tyagi, Nikhil |
Other Authors: | Srivastava, Sanjeev K , Arora, Sumit , Omar, Yousef , Ijaz, Zohaib Mohammad , AL-Ghadhban, Ahmed , Deshmukh, Sachin K , Carter, James E , Singh, Ajay P , Singh, Seema, Ph.D |
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Quelle: | Alma/SFX Local Collection |
Publisher: | Ireland: Elsevier B.V |
ID: | ISSN: 0304-3835 |
Link: | https://www.ncbi.nlm.nih.gov/pubmed/27693632 |
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recordid: | cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_5086276 |
title: | Comparative analysis of the relative potential of silver, zinc-oxide and titanium-dioxide nanoparticles against UVB-induced DNA damage for the prevention of skin carcinogenesis |
format: | Article |
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ispartof: | Cancer letters, 2016, Vol.383 (1), p.53-61 |
description: | Abstract Sunscreen formulations containing UVB filters, such as Zinc-oxide (ZnO) and titanium-dioxide (TiO2) nanoparticles (NPs) have been developed to limit the exposure of human skin to UV-radiations. Unfortunately, these UVB protective agents have failed in controlling the skin cancer incidence. We recently demonstrated that silver nanoparticles (Ag-NPs) could serve as novel protective agents against UVB-radiations. Here our goal was to perform comparative analysis of direct and indirect UVB-protection efficacy of ZnO-, TiO2 - and Ag-NPs. Sun-protection-factor calculated based on their UVB-reflective/absorption abilities was the highest for TiO2 -NPs followed by Ag- and ZnO-NPs. This was further confirmed by studying indirect protection of UVB radiation-induced death of HaCaT cells. However, only Ag-NPs were active in protecting HaCaT cells against direct UVB-induced DNA-damage by repairing bulky-DNA lesions through nucleotide-excision-repair mechanism. Moreover, Ag-NPs were also effective in protecting HaCaT cells from UVB-induced oxidative DNA damage by enhancing SOD/CAT/GPx activity. In contrast, ZnO- and TiO2 -NPs not only failed in providing any direct protection from DNA-damage, but rather enhanced oxidative DNA-damage by increasing ROS production. Together, these findings raise concerns about safety of ZnO- and TiO2-NPs and establish superior protective efficacy of Ag-NPs. |
language: | eng |
source: | Alma/SFX Local Collection |
identifier: | ISSN: 0304-3835 |
fulltext: | fulltext |
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url: | Link |
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