The TSC1-2 tumor suppressor controls insulin-PI3K signaling via regulation of IRS proteins.
The TSC1-2 tumor suppressor controls insulin-PI3K signaling via regulation of IRS proteins.
复制标题
DOI:
10.1083/jcb.200403069
复制
发表时间:
2004-07-19
期刊:
影响因子:
--
通讯作者:
Lamb RF
中科院分区:
文献类型:
--
作者:
Harrington LS;Findlay GM;Gray A;Tolkacheva T;Wigfield S;Rebholz H;Barnett J;Leslie NR;Cheng S;Shepherd PR;Gout I;Downes CP;Lamb RF
Insulin-like growth factors elicit many responses through activation of phosphoinositide 3-OH kinase (PI3K). The tuberous sclerosis complex (TSC1-2) suppresses cell growth by negatively regulating a protein kinase, p70S6K (S6K1), which generally requires PI3K signals for its activation. Here, we show that TSC1-2 is required for insulin signaling to PI3K. TSC1-2 maintains insulin signaling to PI3K by restraining the activity of S6K, which when activated inactivates insulin receptor substrate (IRS) function, via repression of IRS-1 gene expression and via direct phosphorylation of IRS-1. Our results argue that the low malignant potential of tumors arising from TSC1-2 dysfunction may be explained by the failure of TSC mutant cells to activate PI3K and its downstream effectors.
登录
查看更多内容
影响因子:
4.8
作者:
Giraud, J;Leshan, R;White, MF
通讯作者:
White, MF
影响因子:
6
作者:
Karbowniczek, M;Yu, J;Henske, EP
通讯作者:
Henske, EP
影响因子:
64.5
作者:
Ito, N;Rubin, GM
通讯作者:
Rubin, GM
影响因子:
11.4
作者:
Leevers, SJ;Weinkove, D;Waterfield, MD
通讯作者:
Waterfield, MD
影响因子:
4.8
作者:
Martin, KA;Schalm, SS;Blenis, J
通讯作者:
Blenis, J