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- W3031456703 abstract "ObjectiveTo evaluate the effects of ultraviolet A (UVA) on autophagy in human skin fibroblasts (HSFs).MethodsCultured HSFs were randomly divided into chronic and acute UVA radiation groups. HSFs in the chronic UVA radiation groups were irradiated with UVA at 5, 10 and 20 J/cm2 separately once a day for 4 consecutive days, with HSFs receiving no radiation serving as the chronic radiation control group; HSFs in the acute UVA radiation groups received a single session of radiation with 5, 10, 30 and 60 J/cm2 UVA separately, with HSFs receiving no radiation serving as the acute radiation control group. After additional culture for different durations, methyl thiazolyl tetrazolium (MTT) assay was performed to evaluate the proliferative activity of HSFs, monodansylcadaverin (MDC) staining to determine autophagy levels, and Western blot analysis to track the conversion of the microtubule-associated protein 1 light chain-3 (LC3) -Ⅰto LC3-Ⅱ. Statistical analysis was carried out by using one-way analysis of variance followed by Students-Newman-Keuls (SNK) test for multiple-group comparisons and by the independent sample t test for two-group comparisons.ResultsThe cellular proliferative activity significantly decreased in the 3 chronic radiation groups at 1 hour after the final UVA radiation compared with the chronic radiation control group (F= 155.5, P 0.05) , but showed no significant changes in any of the acute radiation groups at 1, 6 or 12 hours after UVA radiation compared with the acute radiation control group (F= 0.014, 0.004, 0.002, all P> 0.05). The ratio of LC3-Ⅱ to LC3-Ⅰwas significantly elevated in all the 3 chronic radiation groups at 1 hour after UVA radiation compared with the chronic radiation control group (t= 9.002, 21.772, 18.33, all P 0.05).ConclusionChronic UVA radiation can upregulate autophagy levels in HSFs, but acute UVA radiation has no evident effects on it.Key words: Ultraviolet rays; Autophagy; Fibroblasts; Cell proliferation" @default.
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- W3031456703 date "2015-11-15" @default.
- W3031456703 modified "2023-09-23" @default.
- W3031456703 title "Effects of ultraviolet A on autophagy in human skin fibroblasts" @default.
- W3031456703 doi "https://doi.org/10.3760/cma.j.issn.0412-4030.2015.11.008" @default.
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