文献库 文献相关信息

题目:
Thrombin promotes the expression of Ccnd1 gene in RPE cells through the activation of converging signaling pathways.
作者:
Lee-Rivera(Irene),López(Edith),Parrales(Alejandro),Alvarez-Arce(Alejandro),López-Colomé(Ana María)
状态:
发布时间2015-09-15 , 更新时间 2015-09-15
期刊:
Exp Eye Res
摘要:
The breakdown of the blood-retina barrier exposes retinal pigment epithelium (RPE) to serum components, thrombin among them. In addition to coagulation, thrombin acting through Protease-Activated Receptors (PARs 1-4) participates in a number of processes including cell proliferation, transformation, and migration. The purpose of this study was to identify interacting signaling pathways by which the activation of PAR1 by thrombin triggers cyclin D1 gene (Ccnd1) expression and the proliferation of RPE cells, characteristic of proliferative vitreoretinopathy (PVR). Our results demonstrate that thrombin induces the expression of the c-fos gene (c-fos), the activation of the (fos/jun) AP-1 site and the expression of Ccnd1, in precise correlation with the activation of CREB. Although the expression of both, c-fos and Ccnd1 requires the activation of conventional PKC isoforms and PI3K, downstream signaling from PI3K differs for both genes. Whereas the expression of c-fos requires PI3K-induced PDK1/Akt activity, that of Ccnd1 is mediated by PDK1-independent PKCζ signaling. Additionally, CREB activation may contribute to the induction of Ccnd1 expression through binding to the Ca/CRE element in the Ccnd1 gene promoter. Since cyclin D1 is a key regulator of cell cycle G1/S phase progression essential for proliferation, these findings further strengthen the critical involvement of thrombin in the development of proliferative retinopathies and may provide pharmacologic targets for the prevention or treatment of these diseases.
语言:
eng
DOI:
10.1016/j.exer.2015.08.001

联系方式

山东省济南市 高新区 崇华路359号 三庆世纪财富中心C1115室

电话: 0531-88819269

E-mail: product@genelibs.com

微信公众号

关注微信订阅号,实时查看信息,关注医学生物学动态。