The p53 inhibitor, pifithrin-伪, suppresses self-renewal of embryonic stem cells

详细信息	查看全文 | 推荐本文 |

• 作者：Essam Mohamed Abdelalim^a ; ^b ; ^{essam_abdelalim@yahoo.com} ; Ikuo Tooyama^a
• 关键词：ES cells ; Tumor suppressor gene ; Nanog ; Cyclin D1 ; Proliferation
• 刊名：Biochemical and Biophysical Research Communications
• 出版年：2012
• 期刊代码：159_0006291x
• 类别：bio
• 出版时间：13 April, 2012
• 卷：420
• 期：3
• 页码：605-610
• 文件大小：795 K

摘要

Recent studies have reported the role of p53 in suppressing the pluripotency of embryonic stem (ES) cells after DNA damage and blocking the reprogramming of somatic cells into induced pluripotent stem (iPS) cells. However, to date no evidence has been presented to support the function of p53 in unstressed ES cells. In this study, we investigated the effect of pifithrin (PFT)-伪, an inhibitor of p53-dependent transcriptional activation, on self-renewal of ES cells. Our results revealed that treatment of ES cells with PFT-伪 resulted in the inhibition of ES cell propagation in a dose-dependent manner, as indicated by a marked reduction in the cell number and colony size. Also, PFT-伪 caused a cell cycle arrest and significant reduction in DNA synthesis. In addition, inhibition of p53 activity reduced the expression levels of cyclin D1 and Nanog. These findings indicate that p53 pathway in ES cells rather than acting as an inactive gene, is required for ES cell proliferation and self-renewal under unstressful conditions.