Cell cycle regulation by bevacizumab in ARPE-19 human retinal pigment epithelial cells

作者：Kuo Chien Neng; Chen Chung Yi; Lai Chen Hsiung; Lai Li Ju; Wu Pei Chen; Hung Chia Hui; Chen Ching Hsein

来源：Molecular Medicine Reports, 2012, 6(4): 701-704.

DOI：10.3892/mmr.2012.986

• bevacizumab
• human retinal pigment epithelial cells
• cell cycle
• G1/S arrest
• age-related macular degeneration

Bevacizumab, a recombinant humanized monoclonal antibody, binds vascular endothelial growth factor (VEGF) and inhibits its interaction with receptors found on endothelial cells. Bevacizumab has been increasingly used as an off-label treatment for exudative age-related macular degeneration (A MD). Whether or not bevacizumab is capable of arresting the growth of human retinal pigment epithelial cells remains to be clarified. In this study, flow cytometry was used to evaluate whether bevacizumab markedly induced the G(1)/S phase arrest. The G(1)/S phase cycle-related protein analysis demonstrated that the expression of cyclin-dependent kinase (CDK)2, 4 and 6 and of cyclin D and E, as well as the phosphorylation of retinoblastoma tumor suppressor protein (ppRB) production were found to be markedly reduced by bevacizumab. By contrast, the protein levels of p53, p16, p21 and p27 were increased in bevacizumab-treated ARPE-19 cells (a human retinal pigment epithelial cell line). These events of G(1)/S arrest induced by bevacizumab in ARPE-19 cells suggest that a preventive effect of bevacizumab exists in AMD.

• 出版日期2012-10
• 单位长春大学