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• W2088623675 abstract "Background and Objective: Volatile sulfur compounds are the main cause of halitosis. Hydrogen sulfide is one of these volatile sulfur compounds and the principal malodorous compound in physiological halitosis. Periodontally pathogenic activities of hydrogen sulfide have been previously reported. Hydrogen sulfide induces apoptotic cell death in aorta smooth muscle cells and in other tissues. Apoptosis plays an important role in the onset and progress of periodontitis. The objective of this study was to determine whether hydrogen sulfide causes apoptosis in human gingival fibroblasts. Material and methods: Necrotic cells were detected using a lactate dehydrogenase assay. Apoptosis was ascertained using a histone‐complexed DNA fragment assay and flow cytometry. The level of caspase 3, a key enzyme in apoptotic signaling, was also measured, and the effects of hydrogen sulfide on reactive oxygen species and superoxide dismutase were assessed. DNA damage caused by hydrogen sulfide was examined by means of single‐cell gel electrophoresis. Results: After 72 h of incubation with 100 ng/mL of hydrogen sulfide, necrosis was found in less than 10% of human gingival fibroblasts, whereas apoptosis was significantly increased ( p < 0.05). Superoxide dismutase activity was strongly inhibited, and reactive oxygen species production was enhanced, after 48 and 72 h of incubation. Caspase 3 activity was also increased after 72 h of incubation ( p < 0.01). Tail length, percentage of DNA in tail, and tail moment, measured by single‐cell gel electrophoresis, were also intensified after 72 h of incubation ( p < 0.001). Conclusion: Hydrogen sulfide caused apoptosis and DNA damage in human gingival fibroblasts. An increased level of reactive oxygen species stimulated by hydrogen sulfide may induce apoptosis and DNA strand breaks." @default.
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• W2088623675 date "2008-06-28" @default.
• W2088623675 modified "2023-10-15" @default.
• W2088623675 title "Oral malodorous compound causes apoptosis and genomic DNA damage in human gingival fibroblasts" @default.
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• W2088623675 doi "https://doi.org/10.1111/j.1600-0765.2007.01052.x" @default.
• W2088623675 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18942188" @default.
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