Upadhyay D, Chang W, Wei K, Gao M, Rosen G D
Division of Pulmonary and Critical Care Medicine, Stanford University Medical Center, 300 Pasteur Drive, Rm H3143, Stanford, CA 94305-5236, USA.
FEBS Lett. 2007 Jan 23;581(2):248-52. doi: 10.1016/j.febslet.2006.12.020. Epub 2006 Dec 18.
We studied the effects of fibroblast growth factor (FGF-10) on H2O2-induced alveolar epithelial cell (AEC) G1 arrest and the role of G1 cyclins. FGF-10 prevented H2O2-induced AEC G1 arrest. FGF-10 induced 2-4-fold increase in cyclin E, cyclin A and CDKs (2,4) alone and in AEC treated with H2O2. H2O2 downregulated cyclin D1; FGF-10 blocked these effects. FGF-10 prevented H2O2-induced upregulation of CDK inhibitor, p21. SiRNAp21 blocked H2O2-induced downregulation of cyclins, CDKs and AEC G1 arrest. Accordingly, we provide first evidence that FGF-10 regulates G1 cyclins and CDKs, and prevents H2O2-induced AEC G1 arrest.
我们研究了成纤维细胞生长因子(FGF - 10)对过氧化氢(H2O2)诱导的肺泡上皮细胞(AEC)G1期阻滞的影响以及G1期细胞周期蛋白的作用。FGF - 10可防止H2O2诱导的AEC G1期阻滞。FGF - 10单独作用以及在H2O2处理的AEC中,均可使细胞周期蛋白E、细胞周期蛋白A和周期蛋白依赖性激酶(CDK2、CDK4)增加2 - 4倍。H2O2可下调细胞周期蛋白D1;FGF - 10可阻断这些作用。FGF - 10可防止H2O2诱导的细胞周期蛋白依赖性激酶抑制剂p21上调。小干扰RNA(SiRNA)p21可阻断H2O2诱导的细胞周期蛋白、周期蛋白依赖性激酶下调以及AEC G1期阻滞。因此,我们首次证明FGF - 10可调节G1期细胞周期蛋白和周期蛋白依赖性激酶,并防止H2O2诱导的AEC G1期阻滞。