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ATF2 partly mediated the expressions of proliferative factors and inhibited pro-inflammatory factors' secretion in arsenite-treated human uroepithelial cells.
Toxicology Research ( IF 2.2 ) Pub Date : 2017-03-29 , DOI: 10.1039/c6tx00407e
Shengnan Liu 1 , Fei Wang 1 , Jieyu Liu 1 , Peiyu Jin 1 , Xiaoyan Wang 1 , Li Yang 1 , Shuhua Xi 1
Affiliation  

Inorganic arsenic (iAs) could induce the expression of activating transcription factor-2 (ATF2) in the human urinary bladder epithelial cell line (SV-HUC-1 cells). ATF2, as a member of the bZIP transcription factor family, has been implicated in a transcriptional response leading to cell growth, migration and malignant tumor progression. However, little is known about the effects of ATF2 on proliferative factors in iAs treated human urothelial cells. In this study, ATF2 siRNA was employed to investigate the relationship between ATF2 activation and the expressions of proliferative factors, such as BCL2, cyclin D1, COX-2, MMP1 and PCNA, and pro-inflammatory factors (TNFα, TGFα and IL-8) in SV-HUC-1 cells. The results showed that low concentration arsenite increased the expressions of proliferative factors BCL2, cyclin D1, COX-2, MMP1 and PCNA in SV-HUC-1 cells, and ATF2 siRNA partly decreased the expressions of BCL2, cyclin D1, and COX-2. A neutralizing antibody of IL-8 was used for attenuating the levels of IL-8 and neutralizing antibody of IL-8 did not relieve the expressions of ATF2 and proliferative factors induced by arsenite in SV-HUC-1 cells. In addition, ATF2 knockdown did not decrease the expressions of pro-inflammatory cytokines induced by arsenite in SV-HUC-1 cells, but dramatically increased mRNA expressions of TNFα, TGFα and IL-8 under arsenite and non-arsenite conditions. In conclusion, our present study indicated that ATF2, but not IL-8, played a partial role in the expressions of proliferative factors induced by arsenite in human uroepithelial cells.

中文翻译:

ATF2部分介导了砷处理的人尿道上皮细胞中增殖因子的表达并抑制了炎症因子的分泌。

无机砷(iAs)可以诱导人膀胱上皮细胞系(SV-HUC-1细胞)中激活转录因子2(ATF2)的表达。作为bZIP转录因子家族成员的ATF2与导致细胞生长,迁移和恶性肿瘤进展的转录反应有关。但是,关于ATF2对iAs治疗的人尿道上皮细胞中增殖因子的影响知之甚少。在这项研究中,ATF2 siRNA被用于研究ATF2激活与增殖因子如BCL2,细胞周期蛋白D1,COX-2,MMP1和PCNA以及促炎因子(TNFα,TGFα和IL-8)表达之间的关系。 )在SV-HUC-1细胞中。结果表明,低浓度的亚砷酸盐可上调增殖因子BCL2,cyclin D1,COX-2,SV-HUC-1细胞中的MMP1和PCNA以及ATF2 siRNA部分降低了BCL2,细胞周期蛋白D1和COX-2的表达。IL-8的中和抗体用于减弱IL-8的水平,IL-8的中和抗体不能缓解SV-HUC-1细胞中砷诱导的ATF2表达和增殖因子的表达。此外,ATF2敲低并没有降低亚砷酸盐诱导的SV-HUC-1细胞中促炎细胞因子的表达,但是在亚砷酸盐和非亚砷酸盐条件下,TNFα,TGFα和IL-8的mRNA表达显着增加。总而言之,我们的研究表明,ATF2在人尿道上皮细胞中由亚砷酸盐诱导的增殖因子的表达中发挥了部分作用,但IL-8却没有。IL-8的中和抗体用于减弱IL-8的水平,IL-8的中和抗体不能缓解SV-HUC-1细胞中亚砷酸盐诱导的ATF2和增殖因子的表达。此外,ATF2敲低并没有降低亚砷酸盐诱导的SV-HUC-1细胞中促炎性细胞因子的表达,但是在亚砷酸盐和非亚砷酸盐条件下,TNFα,TGFα和IL-8的mRNA表达显着增加。总而言之,我们的研究表明,ATF2在人尿道上皮细胞中由亚砷酸盐诱导的增殖因子的表达中发挥了部分作用,但IL-8却没有。IL-8的中和抗体用于减弱IL-8的水平,IL-8的中和抗体不能缓解SV-HUC-1细胞中亚砷酸盐诱导的ATF2和增殖因子的表达。此外,ATF2敲低并没有降低亚砷酸盐诱导的SV-HUC-1细胞中促炎细胞因子的表达,但是在亚砷酸盐和非亚砷酸盐条件下,TNFα,TGFα和IL-8的mRNA表达显着增加。总而言之,我们的研究表明,ATF2在人尿道上皮细胞中由亚砷酸盐诱导的增殖因子的表达中发挥了部分作用,但IL-8却没有。ATF2敲低并没有降低亚砷酸盐诱导的SV-HUC-1细胞中促炎性细胞因子的表达,但是在亚砷酸盐和非亚砷酸盐条件下,TNFα,TGFα和IL-8的mRNA表达显着增加。总而言之,我们的研究表明,ATF2在人尿道上皮细胞中由亚砷酸盐诱导的增殖因子的表达中发挥了部分作用,但IL-8却没有。ATF2敲低并没有降低亚砷酸盐诱导的SV-HUC-1细胞中促炎性细胞因子的表达,但是在亚砷酸盐和非亚砷酸盐条件下,TNFα,TGFα和IL-8的mRNA表达显着增加。总而言之,我们的研究表明,ATF2在人尿道上皮细胞中由亚砷酸盐诱导的增殖因子的表达中发挥了部分作用,但IL-8却没有。
更新日期:2017-03-29
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