PRPF6 promotes androgen receptor/androgen receptor-variant 7 actions in castration-resistant prostate cancer cells.

PRPF6 promotes androgen receptor/androgen receptor-variant 7 actions in castration-resistant prostate cancer cells.
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PRPF6 促进去势抵抗性前列腺癌细胞中雄激素受体/雄激素受体变体 7 的作用。

DOI:
10.7150/ijbs.50810
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发表时间:
2021
影响因子:
9.2
通讯作者:
Zhao Y
Zhao Y
中科院分区:
生物学2区
文献类型:
--
作者:
Liu W;Wang C;Wang S;Zeng K;Wei S;Sun N;Sun G;Wang M;Zou R;Liu W;Lin L;Song H;Jin Z;Zhao Y

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雄激素受体(AR)及其变体在前列腺癌的发生和进展中发挥着至关重要的作用。阐明增强其作用的机制对于理解前列腺癌和去势抵抗性前列腺癌转化的过程至关重要。在这里,我们提供的证据表明,前 mRNA 加工因子 6 (PRPF6) 作为 AR 全长 (AR-FL) 和 AR 变体 7 (AR-V7) 作用的关键调节因子,从而参与增强 AR-FL 和 AR-V7 诱导的前列腺癌反式激活。此外,PRPF6 被招募到 AR 靶基因中的顺式调控元件中,并与 JMJD1A 结合以增强 AR 诱导的反式激活。 PRPF6 还促进 AR-FL 和 AR-V7 的表达。此外,PRPF6耗竭减少了前列腺癌衍生细胞系中的肿瘤生长,即使在小鼠模型的去势条件下也能显着抑制异种移植肿瘤。此外,PRPF6在人类前列腺癌样本中明显高表达。总的来说,我们的结果表明 PRPF6 参与致癌 AR 信号传导的增强,这支持了 PRPF6 在前列腺癌和去势抵抗性前列腺癌进展过程中以前未知的作用。
Androgen receptor (AR) and its variants play vital roles in development and progression of prostate cancer. To clarify the mechanisms involved in the enhancement of their actions would be crucial for understanding the process in prostate cancer and castration-resistant prostate cancer transformation. Here, we provided the evidence to show that pre-mRNA processing factor 6 (PRPF6) acts as a key regulator for action of both AR full length (AR-FL) and AR variant 7 (AR-V7), thereby participating in the enhancement of AR-FL and AR-V7-induced transactivation in prostate cancer. In addition, PRPF6 is recruited to cis-regulatory elements in AR target genes and associates with JMJD1A to enhance AR-induced transactivation. PRPF6 also promotes expression of AR-FL and AR-V7. Moreover, PRPF6 depletion reduces tumor growth in prostate cancer-derived cell lines and results in significant suppression of xenograft tumors even under castration condition in mouse model. Furthermore, PRPF6 is obviously highly expressed in human prostate cancer samples. Collectively, our results suggest PRPF6 is involved in enhancement of oncogenic AR signaling, which support a previously unknown role of PRPF6 during progression of prostate cancer and castration-resistant prostate cancers.
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