An Artificial CTCF Peptide Triggers Efficient Therapeutic Efficacy in Ocular Melanoma

An Artificial CTCF Peptide Triggers Efficient Therapeutic Efficacy in Ocular Melanoma
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人工 CTCF 肽可有效治疗眼部黑色素瘤

DOI:
10.1016/j.omto.2020.07.004
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发表时间:
2020-07
影响因子:
5.7
通讯作者:
Fan Xianqun
Fan Xianqun
中科院分区:
医学2区
文献类型:
--
作者:
Wen Xuyang;Wang Huixue;Chai Peiwei;Fan Jiayan;Zhang Xiaoyu;Ding Tianyi;Jia Renbing;Ge Shengfang;Zhang He;Fan Xianqun

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虽然CCCTC结合因子(CTCF)已被证明在肿瘤发生中发挥各种往往相互矛盾的作用,很少有人知道它在眼黑色素瘤的肿瘤发生的功能。在这里,我们产生了两个人工CTCF肽(Decoy-CTCF)结合野生型CTCF和人工标记区域的锌指结构域。该Decoy-CTCF保留了野生型CTCF的DNA结合区,但失去了其功能区。将人工CTCF转入眼黑色素瘤细胞中可抑制肿瘤细胞的增殖和迁移,而对正常细胞无影响。有趣的是,我们首次发现诱饵CTCF通过阻止组蛋白乙酰转移酶EP 300与SELL启动子结合来抑制肿瘤发生,因此SELL是眼黑色素瘤肿瘤发生中的一种新癌基因。这些研究为眼恶性黑色素瘤提供了有效的基于诱骗CTCF的治疗概念,并揭示了基于诱骗的肿瘤治疗的潜在机制。
Although CCCTC binding factor (CTCF) has been demonstrated to play a variety of often contradictory roles in tumorigenesis, little is known about its function in the tumorigenesis of ocular melanoma. Here, we generated two artificial CTCF peptides (Decoy-CTCFs) combining the zinc finger domain of wild-type CTCF and artificial marker region. This Decoy-CTCF retained the DNA binding region but lost the functional regions of wild-type CTCF.Transferring artificial CTCF into ocular melanoma cells suppressed proliferation and migration in the tumor cells, while no effect was observed in normal cells. Intriguingly, we first showed that decoy-CTCF inhibited tumorigenesis by preventing the histone acetyltransferase EP300 from binding to the promoter ofSELL.ThusSELLwas a novel oncogene in the tumorigenesis of ocular melanoma. These studies provide efficient decoy CTCF-based therapeutic concept in malignant ocular melanoma and reveal the potential mechanism underlying decoy-based tumor therapy.
DOI: 10.1038/nature12113
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