FU Yueqiang, et al. Injury of alveolar type Ⅱ cell and JNK signal transduction induced by hydrogen peroxide[J]. Journal of Chongqing Medical University, 2007,(11):1150-1153.
FU Yueqiang, et al. Injury of alveolar type Ⅱ cell and JNK signal transduction induced by hydrogen peroxide[J]. Journal of Chongqing Medical University, 2007,(11):1150-1153.DOI:
氧化应激对肺泡Ⅱ型上皮细胞的损伤作用及JNK信号转导机制
摘要
目的:探讨氧化应激状态下肺泡II型上皮细胞(Alveolar type Ⅱ epithelial cell
Objective:To investigate survival and apoptotic responses of alveolar epithelial typeⅡcells(ATⅡ cell)under oxidative stress and to discuss the regulation mechanism mediated by c-jun NH2-terminal kinase(JNK).Methods:Primary rat alveolar epithelial typeⅡcells were attacked by Hydrogen peroxide(H2O2)and cells were pretreated with SP600125 in some groups.Cell viability
apoptotic rate and the expression of phosphorylated JNK(p-JNK)were measured by 3-(4
5-dimethylthiazol-2-yl)-2
5-diphenyltetrazolium bromide(MTT)assay
flow cytometry and western blot analysis
respectively.Results:Compared with control group
decreased cell viability and increased apoptotic rate in ATⅡ cells occurred in time-dependent manner when treated with 500μmol/L H2O2 in different time.H2O2 induces phosphorylation of JNK.SP600125 enhanced cell viability and decreased apoptotic rate after H2O2-exposure.Conclusion:Apoptosis could be induced by H2O2 in ATⅡ cells in time-dependent manner.JNK signaling pathway may play a proapoptotic role in the regulation of apoptosis induced by H2O2.
关键词
肺泡Ⅱ型上皮细胞凋亡c-Jun氨基端激酶活性氧
Keywords
Alveolar epithelial type Ⅱ cellapoptosisc-jun NH2-terminal kinasereactive oxygen species