E3 ubiquitin protein ligase, E6-associated protein (E6-AP) regulates PI3K-Akt signaling and prostate cell growth.
E3 ubiquitin protein ligase, E6-associated protein (E6-AP) regulates PI3K-Akt signaling and prostate cell growth.
复制标题
DOI：
10.1016/j.bbagrm.2010.08.011
复制
发表时间：
2011-02
影响因子：
4.7
通讯作者：
Nawaz, Zafar
中科院分区：
文献类型：
--
作者：
Srinivasan, Sathish;Nawaz, Zafar
This study elucidates the role of E6-associated protein, E6-AP (a dual function steroid hormone receptor coactivator and ubiquitin-protein ligase) in the regulation of PI3K-Akt signaling pathway, prostate gland growth and proliferation. Here, we report the generation of transgenic mice and prostate cancer cell line, LNCaP cells that overexpress E6-AP protein. Using these models we show that the levels of total Akt and phosphorylated Akt (active Akt) are increased in E6-AP overexpressing prostate gland and LNCaP cells suggesting that E6-AP regulates the PI3K-Akt signaling pathway. The prostate glands in our transgenic mice are ~20% larger and produce preneoplastic lesions at the age of 18 months. Our data also suggest that E6-AP modulates PI3K-Akt signaling pathway by both androgen-independent and -dependent mechanisms. In the androgen-independent mechanism, E6-AP modulates PI3K-Akt signaling by regulating the protein levels of RhoA, a small GTPase, which is a negative regulator of the Akt signaling pathway. Further, we show that E6-AP, a known coactivator of AR, amplifies the androgen-dependent activation of PI3K-Akt signaling pathway. In addition, we show that stable overexpression of E6-AP in prostate cancer cells results in increased cell size and proliferation. Overall our data suggests that E6-AP regulates both the positive and negative modulators of the PI3K-Akt pathway in prostate cells which results in increased prostate cell growth, proliferation and decreased apoptosis.
登录
查看更多内容
影响因子：
64.5
作者：
SCHEFFNER, M;HUIBREGTSE, JM;HOWLEY, PM
通讯作者：
HOWLEY, PM
DOI：
10.1073/pnas.91.19.8797
发表时间：
1994-09-13
影响因子：
11.1
作者：
SCHEFFNER, M;HUIBREGTSE, JM;HOWLEY, PM
通讯作者：
HOWLEY, PM
影响因子：
4.8
作者：
Baron, S;Manin, M;Morel, L
通讯作者：
Morel, L
影响因子：
11.2
作者：
Zhou, HJ;Yan, J;Tsai, NJ
通讯作者：
Tsai, NJ
影响因子：
5.3
作者：
Zhou, G;Hashimoto, Y;Tsai, MJ
通讯作者：
Tsai, MJ