The toxic and stress responses of cultured human retinal pigment epithelium (ARPE19) and human glial cells (SVG) in the presence of triamcinolone

被引:92
|
作者
Yeung, CK [1 ]
Chan, K [1 ]
Chiang, SWY [1 ]
Pang, CP [1 ]
Lam, DSC [1 ]
机构
[1] Chinese Univ Hong Kong, Dept Ophthalmol & Visual Sci, Hong Kong Eye Hosp, Kowloon, Hong Kong, Peoples R China
关键词
D O I
10.1167/iovs.03-0490
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
PURPOSE. To compare the cytotoxic effect of TA on human retinal pigment epithelium (ARPE19) and human glial (SVG) cells over a range of concentrations and durations of exposure. METHODS. TA (0.01-1 mg/mL) or vehicle (benzyl alcohol, 0.025%) was added to the ARPE19 and SVG cultures on day 0 and then subsequently for 1, 3, or 5 days. The amount of cell proliferations with or without TA treatment was performed using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. All samples were read in triplicate (n = 4 in all cases). c-Fos, c-jun, caspase-3, c-myc, and p53 expression was determined after TA treatments after 0, 10, 20, 30, 40, 50, 60, and 90 minutes. All results were analyzed with ANOVA. RESULTS. TA (0.01-1 mg/mL) caused a significant reduction in ARPE19 cells that had been exposed to it for more than I day. Significant reductions in the number of SVG cells were observed as early as day I at 0.1 and 1 mg/mL TA. In general, the level of remaining SVG cells was less than that of the APRE19 cells over the 5 days. SVG cells appeared more susceptible to TA. Caspase-3 was elevated in both ARPE19 and SVG cells after TA treatment. c-Fos and c-jun expression was also increased in ARPE19 cells but not in SVG. The vehicle of TA had no effect, and there was no change in p53 or c-myc expression. CONCLUSIONS TA was cytotoxic to both SVG and ARPE19 cells, with higher efficacy on SVG. TA caused the activation of the caspase-3 pathway more readily than the cell-protective c-fos and c-jun pathways in SVG cells, making those cells more vulnerable than the ARPE19 cells. The results suggest that TA toxicity in one cell type may not reliably indicate its toxicity in other cells. Different cells within the retina may react to TA differently, or TA may cause changes in the gene expressions differentially with different concentrations of the same stimulus.
引用
收藏
页码:5293 / 5300
页数:8
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