PCGF1 promotes epigenetic activation of stemness markers and colorectal cancer stem cell enrichment.

PCGF1 promotes epigenetic activation of stemness markers and colorectal cancer stem cell enrichment.
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PCGF1促进干性标记物的表观遗传激活和结直肠癌干细胞富集

DOI:
10.1038/s41419-021-03914-2
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发表时间:
2021-06-19
影响因子:
9
通讯作者:
Hao A
Hao A
中科院分区:
生物学1区
文献类型:
--
作者:
Ji G;Zhou W;Du J;Zhou J;Wu D;Zhao M;Yang L;Hao A

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结直肠癌(CRC)干细胞对癌症治疗具有抵抗力,因此在传统治疗失败后会导致肿瘤进展。然而,人们对维持干性的分子机制知之甚少。在这项研究中,我们确定 PCGF1 是维持 CRC 干细胞样表型的关键表观遗传调节因子。 PCGF1在结直肠癌中的表达增加,并且与结直肠癌患者的癌症进展和不良预后显着相关。 PCGF1敲低抑制CRC干细胞增殖和CRC干细胞富集。重要的是,PCGF1 沉默会损害体内肿瘤生长。从机制上讲,PCGF1 与 CRC 干细胞标记的启动子结合,并通过增加 H3K4 组蛋白三甲基化 (H3K4me3) 标记并通过增加 H3K4me3 甲基转移酶 KMT2A 和 H3K27me3 去甲基化酶 KDM6A 的表达来减少其启动子上的 H3K27 组蛋白三甲基化 (H3K27me3) 标记来激活其转录。我们的研究结果表明 PCGF1 是 CRC 治疗的潜在治疗靶点。
Colorectal cancer (CRC) stem cells are resistant to cancer therapy and are therefore responsible for tumour progression after conventional therapy fails. However, the molecular mechanisms underlying the maintenance of stemness are poorly understood. In this study, we identified PCGF1 as a crucial epigenetic regulator that sustains the stem cell-like phenotype of CRC. PCGF1 expression was increased in CRC and was significantly correlated with cancer progression and poor prognosis in CRC patients. PCGF1 knockdown inhibited CRC stem cell proliferation and CRC stem cell enrichment. Importantly, PCGF1 silencing impaired tumour growth in vivo. Mechanistically, PCGF1 bound to the promoters of CRC stem cell markers and activated their transcription by increasing the H3K4 histone trimethylation (H3K4me3) marks and decreasing the H3K27 histone trimethylation (H3K27me3) marks on their promoters by increasing expression of the H3K4me3 methyltransferase KMT2A and the H3K27me3 demethylase KDM6A. Our findings suggest that PCGF1 is a potential therapeutic target for CRC treatment.
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