14-3-3ζ turns TGF-β's function from tumor suppressor to metastasis promoter in breast cancer by contextual changes of Smad partners from p53 to Gli2.
14-3-3ζ turns TGF-β's function from tumor suppressor to metastasis promoter in breast cancer by contextual changes of Smad partners from p53 to Gli2.
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DOI:
10.1016/j.ccell.2014.11.025
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发表时间:
2015-02-09
期刊:
影响因子:
50.3
通讯作者:
Yu D
中科院分区:
文献类型:
--
作者:
Xu J;Acharya S;Sahin O;Zhang Q;Saito Y;Yao J;Wang H;Li P;Zhang L;Lowery FJ;Kuo WL;Xiao Y;Ensor J;Sahin AA;Zhang XH;Hung MC;Zhang JD;Yu D
Transforming growth factor-β (TGF-β) functions as a tumor suppressor in pre-malignant cells but as a metastasis promoter in cancer cells. The dichotomous functions of TGF-β are proposed to be dictated by different partners of its downstream effectors Smads. However, the mechanism for the contextual changes of Smad partners remained undefined. Here, we demonstrate that 14-3-3ζ destabilizes p53, a Smad partner in pre-malignant mammary epithelial cells, by downregulating 14-3-3σ, thus turning off TGF-β’s tumor suppression function. Conversely, 14-3-3ζ stabilizes Gli2 in breast cancer cells, and Gli2 partners with Smads to activate PTHrP and promote TGF-β-induced bone metastasis. The 14-3-3ζ-driven contextual changes of Smad partners from p53 to Gli2 may serve as biomarkers and therapeutic targets of TGF-β-mediated cancer progression.
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