Tripartite motif-containing 3 (TRIM3) enhances ER signaling and confers tamoxifen resistance in breast cancer.

Tripartite motif-containing 3 (TRIM3) enhances ER signaling and confers tamoxifen resistance in breast cancer.
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含三联基序 3 (TRIM3) 增强 ER 信号传导并赋予乳腺癌他莫昔芬耐药性

DOI:
10.1038/s41389-021-00350-x
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发表时间:
2021-09-10
期刊:
影响因子:
6.2
通讯作者:
Wang S
Wang S
中科院分区:
医学1区
文献类型:
--
作者:
Ye R;AiErken N;Kuang X;Zeng H;Shao N;Lin Y;Liu P;Wang S

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三苯氧胺耐药仍然是雌激素受体(ER)阳性乳腺癌的临床问题。ERα的SUMO化增强ERα诱导的转录活性。TRIM蛋白是一类新的SUMO E3连接酶,它调节蛋白质的SUMO化。然而,TRIM3在SUMO化和对他莫昔芬的反应中的精确分子机制和功能仍不清楚。在本研究中,我们观察到TRIM3在乳腺癌中显著过表达,这与他莫昔芬耐药相关。此外,TRIM3过表达与用他莫昔芬治疗的ER+乳腺癌患者的不良生存率显著相关。TRIM3过表达赋予细胞存活和肿瘤发生,而TRIM3的敲低降低了这些能力。此外,TRIM 3作为泛素载体蛋白9(UBC 9)结合蛋白,促进雌激素受体1(ESR1)的SUMO修饰并激活ER途径。沉默UBC 9消除了TRIM 3在调节他莫昔芬抗性中的功能。这些结果表明TRIM3是乳腺癌治疗的一种新的生物标志物,表明抑制TRIM3与他莫昔芬的组合可能为乳腺癌提供潜在的治疗。
Tamoxifen resistance remains a clinical problem in estrogen receptor (ER)-positive breast cancer. SUMOylation of ERα enhances ERα-induced transcription activity. Tripartite motif-containing (TRIM) proteins are a new class of SUMO E3 ligases, which regulate the SUMOylation of proteins. However, the precise molecular mechanism and function of TRIM3 in SUMOylation and the response to tamoxifen remain unclear. In the present study, we observed that TRIM3 was dramatically overexpressed in breast cancer, which correlated with tamoxifen resistance. Furthermore, TRIM3 overexpression significantly correlated with poor survival of patients with ER+ breast cancer treated with tamoxifen. TRIM3 overexpression conferred cell survival and tumorigenesis, whereas knocking down of TRIM3 reduced these capabilities. Moreover, TRIM3, as a ubiquitin carrier protein 9 (UBC9) binding protein, promoted SUMO modification of estrogen receptor 1 (ESR1) and activated the ER pathway. Silencing UBC9 abolished the function of TRIM3 in regulating tamoxifen resistance. These results suggest TRIM3 as a novel biomarker for breast cancer therapy, indicating that inhibiting TRIM3 combined with tamoxifen might provide a potential treatment for breast cancer.
外泌体 TRIM3 是胃癌的新标志物和治疗靶点
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