BASP1 interacts with oestrogen receptor α and modifies the tamoxifen response.

BASP1 interacts with oestrogen receptor α and modifies the tamoxifen response.
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DOI:
10.1038/cddis.2017.179
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发表时间:
2017-05-11
影响因子:
9
通讯作者:
Roberts SG
Roberts SG
中科院分区:
生物学1区
文献类型:
--
作者:
Marsh LA;Carrera S;Shandilya J;Heesom KJ;Davidson AD;Medler KF;Roberts SG

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他莫昔芬与雌激素受体 α (ERα) 结合,引发因细胞/组织类型和状态而异的不同反应,但决定这些差异效应的因素尚不清楚。在这里,我们报道转录辅阻遏物 BASP1 与 ERα 相互作用,并且在乳腺癌细胞中,他莫昔芬增强了这种相互作用。我们发现 BASP1 在乳腺癌细胞对他莫昔芬的转录反应中充当主要选择性因子。总之,乳腺癌细胞中 40% 受他莫昔芬调节的基因是 BASP1 依赖性的,其中包括一些与他莫昔芬耐药性相关的基因。 BASP1 在乳腺癌细胞中引发肿瘤抑制活性,并增强他莫昔芬治疗的抗肿瘤作用。此外,BASP1 在乳腺癌组织中表达,并与患者生存率增加相关。我们的数据已确定 BASP1 是 ERα 辅助因子,在他莫昔芬的转录和抗肿瘤作用中发挥核心作用。
Tamoxifen binds to oestrogen receptor α (ERα) to elicit distinct responses that vary by cell/tissue type and status, but the factors that determine these differential effects are unknown. Here we report that the transcriptional corepressor BASP1 interacts with ERα and in breast cancer cells, this interaction is enhanced by tamoxifen. We find that BASP1 acts as a major selectivity factor in the transcriptional response of breast cancer cells to tamoxifen. In all, 40% of the genes that are regulated by tamoxifen in breast cancer cells are BASP1 dependent, including several genes that are associated with tamoxifen resistance. BASP1 elicits tumour-suppressor activity in breast cancer cells and enhances the antitumourigenic effects of tamoxifen treatment. Moreover, BASP1 is expressed in breast cancer tissue and is associated with increased patient survival. Our data have identified BASP1 as an ERα cofactor that has a central role in the transcriptional and antitumourigenic effects of tamoxifen.
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