AKT-independent signaling downstream of oncogenic PIK3CA mutations in human cancer.
AKT-independent signaling downstream of oncogenic PIK3CA mutations in human cancer.
复制标题
人类癌症中致癌PIK3CA突变下游AKT非依赖性信号传导。
DOI:
10.1016/j.ccr.2009.04.012
复制
发表时间:
2009-07-07
期刊:
影响因子:
50.3
通讯作者:
Garraway LA
中科院分区:
文献类型:
--
作者:
Vasudevan KM;Barbie DA;Davies MA;Rabinovsky R;McNear CJ;Kim JJ;Hennessy BT;Tseng H;Pochanard P;Kim SY;Dunn IF;Schinzel AC;Sandy P;Hoersch S;Sheng Q;Gupta PB;Boehm JS;Reiling JH;Silver S;Lu Y;Stemke-Hale K;Dutta B;Joy C;Sahin AA;Gonzalez-Angulo AM;Lluch A;Rameh LE;Jacks T;Root DE;Lander ES;Mills GB;Hahn WC;Sellers WR;Garraway LA
Dysregulation of the phosphatidylinositol 3-kinase (PI3K) signaling pathway occurs commonly in human cancer. PTEN tumor suppressor or PIK3CA oncogene mutations both direct PI3K-dependent tumorigenesis largely through activation of the AKT/PKB kinase. However, here we show through phospho-protein profiling and functional genomic studies that many PIK3CA-mutant cancer cell lines and human breast tumors exhibit only minimal AKT activation, and a diminished reliance on AKT for anchorage-independent growth. Instead, these cells retain robust PDK1 activation and membrane localization, and exhibit dependency on the PDK1 substrate SGK3. SGK3 undergoes PI3K- and PDK1-dependent activation in PIK3CA-mutant cancer cells. Thus, PI3K may promote cancer through both AKT-dependent and AKT-independent mechanisms. Knowledge of differential PI3K/PDK1 signaling could inform rational therapeutics in cancers harboring PIK3CA mutations.
登录
查看更多内容
影响因子:
64.5
作者:
Brunet, A;Bonni, A;Greenberg, ME
通讯作者:
Greenberg, ME
影响因子:
4.1
作者:
Currie, RA;Walker, KS;Lucocq, J
通讯作者:
Lucocq, J
影响因子:
50.3
作者:
Neve, Richard M.;Chin, Koei;Gray, Joe W.
通讯作者:
Gray, Joe W.
影响因子:
11.2
作者:
Isakoff, SJ;Engelman, JA;Brugge, JS
通讯作者:
Brugge, JS
影响因子:
9.8
作者:
Jones KT;Greer ER;Pearce D;Ashrafi K
通讯作者:
Ashrafi K