Oncogenic function of p34(SEI-1) via NEDD4-1-mediated PTEN ubiquitination/degradation and activation of the PI3K/AKT pathway
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초록

A 34-KD protein encoded by the SEI-1 gene (p34(SEI-1)), is a relatively recently discovered oncoprotein that has multiple important biological functions. Our data show that p34(SEI-1) enhances cancer cell survival and promotes tumorigenesis by downregulating the tumor suppressor PTEN, a negative regulator of the PI3K/AKT signaling pathway, and therefore activating the PI3K/AKT signaling pathway. In this process, p34(SEI-1) positively affects NEDD4-1 gene expression both at the transcriptional and protein levels. Furthermore, the expression levels of p34(SEI-1) and NEDD4-1 were found to be coordinated in tumor tissues obtained from patients with breast cancer. We also show that p34(SEI-1) affects the subcellular localization of PTEN.

키워드

34-KD protein encoding selected with Ink4a-1 as bait genephosphatase and tensin homolog deleted on chromosome tenneuronal precursor cell-expressed developmentally downregulated 4-1phosphoinositide-3 kinase/protein kinase BtumorigenesisUBIQUITIN LIGASE NEDD4-1INTEGRIN-LINKED KINASEPI3K-AKT-MTOR PATHWAYTUMOR-SUPPRESSORPROSTATE-CANCERCELL-SURVIVALAPOPTOSISINSTABILITYPROGRESSIONMETASTASIS
제목
Oncogenic function of p34(SEI-1) via NEDD4-1-mediated PTEN ubiquitination/degradation and activation of the PI3K/AKT pathway
저자
Jung, SamilLi, ChengpingJeong, DongjunLee, SoonduckOhk, JiyeonPark, MeeyoungHan, SongyiDuan, JingjingKim, ChangjinYang, YoungKim, Keun-IlLim, Jong-SeokKang, Young-SookLee, Myeong-Sok
DOI
10.3892/ijo.2013.2064
발행일
2013-11
유형
Article
저널명
International Journal of Oncology
43
5
페이지
1587 ~ 1595