Qi Qian-Rong, Zhao Xu-Yu, Zuo Ru-Juan, Wang Tong-Song, Gu Xiao-Wei, Liu Ji-Long, Yang Zeng-Ming
a College of Veterinary Medicine; South China Agricultural University ; Guangzhou , China.
Cell Cycle. 2015;14(12):1842-58. doi: 10.1080/15384101.2015.1033593.
Polyploid decidual cells are specifically differentiated cells during mouse uterine decidualization. However, little is known about the regulatory mechanism and physiological significance of polyploidization in pregnancy. Here we report a novel role of E2F8 in the polyploidization of decidual cells in mice. E2F8 is highly expressed in decidual cells and regulated by progesterone through HB-EGF/EGFR/ERK/STAT3 signaling pathway. E2F8 transcriptionally suppresses CDK1, thus triggering the polyploidization of decidual cells. E2F8-mediated polyploidization is a response to stresses which are accompanied by decidualization. Interestingly, polyploidization is not detected during human decidualization with the down-regulation of E2F8, indicating differential expression of E2F8 may lead to the difference of decidual cell polyploidization between mice and humans.
多倍体蜕膜细胞是小鼠子宫蜕膜化过程中特化的细胞。然而,关于妊娠过程中多倍体化的调控机制和生理意义,我们知之甚少。在此,我们报道了E2F8在小鼠蜕膜细胞多倍体化中的新作用。E2F8在蜕膜细胞中高表达,并通过HB-EGF/EGFR/ERK/STAT3信号通路受孕酮调控。E2F8转录抑制CDK1,从而触发蜕膜细胞的多倍体化。E2F8介导的多倍体化是对伴随蜕膜化的应激的一种反应。有趣的是,在人蜕膜化过程中,随着E2F8的下调未检测到多倍体化,这表明E2F8的差异表达可能导致小鼠和人之间蜕膜细胞多倍体化的差异。