LEM4 confers tamoxifen resistance to breast cancer cells by activating cyclin D-CDK4/6-Rb and ERα pathway.
LEM4 confers tamoxifen resistance to breast cancer cells by activating cyclin D-CDK4/6-Rb and ERα pathway.
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LEM4 通过激活细胞周期蛋白 D-CDK4/6-Rb 和 ERα 途径赋予乳腺癌细胞他莫昔芬耐药性。
DOI:
10.1038/s41467-018-06309-8
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发表时间:
2018-10-09
影响因子:
16.6
通讯作者:
Zhu Z
中科院分区:
文献类型:
--
作者:
Gao A;Sun T;Ma G;Cao J;Hu Q;Chen L;Wang Y;Wang Q;Sun J;Wu R;Wu Q;Zhou J;Liu L;Hu J;Dong JT;Zhu Z
The elucidation of molecular events that confer tamoxifen resistance to estrogen receptor α (ER) positive breast cancer is of major scientific and therapeutic importance. Here, we report that LEM4 overexpression renders ER+ breast cancer cells resistant to tamoxifen by activating the cyclin D-CDK4/6 axis and the ERα signaling. We show that LEM4 overexpression accelerates tumor growth. Interaction with LEM4 stabilizes CDK4 and Rb, promotes Rb phosphorylation and the G1/S phase transition. LEM4 depletion or combined tamoxifen and PD0332991 treatment significantly reverses tamoxifen resistance. Furthermore, LEM4 interacts with and stabilizes both Aurora-A and ERα, promotes Aurora-A mediated phosphorylation of ERα-Ser167, leading to increase in ERα DNA-binding and transactivation activity. Elevated levels of LEM4 correlates with poorer relapse-free survival in patients with ER+ breast cancer undergoing endocrine therapy. Thus, LEM4 represents a prognostic marker and an attractive target for breast cancer therapeutics. Functional antagonism of LEM4 could overcome tamoxifen resistance. Tamoxifen resistance is a major problem in the treatment of ERa positive breast cancer. Here, the authors show that LEM4 confers tamoxifen resistance by activating the cyclin D-CDK4/6-Rb axis and ERa signaling in endocrine-resistant breast cancer.
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8
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影响因子:
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Dowsett, M
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Holz, Marina K.
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通讯作者:
Sotiriou, Christos
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通讯作者:
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