Silver nanoparticles induce p53-mediated apoptosis in human bronchial epithelial (BEAS-2B) cells
スポンサーリンク
概要
- 論文の詳細を見る
Deregulated apoptosis has been associated with many lung diseases. Although many studies have reported the apoptotic effects exhibited by silver nanoparticles (Ag-NPs) in various circumstances, the apoptosis mechanism of Ag-NPs is unclear. We investigated oxidative stress and apoptosis in human normal bronchial epithelial (BEAS-2B) cells to elucidate the role of p53 in apoptosis by Ag-NPs. First, dispersion and stability of Ag-NPs improved using bronchial epithelial cell growth medium with 5% fetal bovine serum. Then, we observed oxidative stress in BEAS-2B cells exposed to Ag-NPs. Second, we carried out a cell death assay to measure DNA fragmentation as a biomarker of apoptosis. BEAS-2B cells were treated with p53-specific short interfering RNA (siRNA) or p53 inhibitor (pifithrin-α) to investigate whether p53 is involved in apoptosis by Ag-NPs. As a result, Ag-NPs significantly enhanced DNA fragmentation dose-dependently and treatment with p53 siRNA or pifithrin-α prevented DNA fragmentation. We also found that apoptosis-related genes (caspase-3, Bax, and Bcl-2) were regulated by Ag-NPs, which was detected by mRNA and protein levels. These results suggest that Ag-NPs induced p53-mediated apoptosis in BEAS-2B cells. Our findings may contribute to understanding the potential roles of Ag-NPs in pulmonary disease.
- 一般社団法人 日本毒性学会の論文
一般社団法人 日本毒性学会 | 論文
- No carcinogenicity of ethyl tertiary-butyl ether by 2-year oral administration in rats
- Genotoxicity evaluation of chlorpyrifos: a gender related approach in regular toxicity testing
- Induction of the fatty acid 2-hydroxylase (FA2H) gene by Δ9-tetrahydrocannabinol in human breast cancer cells
- Increased production of reactive oxygen species by the vacuolar-type (H+)-ATPase inhibitors bafilomycin A1 and concanamycin A in RAW 264 cells
- Evaluation of cytotoxic potential of cored soft contact lenses with adsorbed active ingredients from over-the-counter eye drops