Histone Methyltransferase Setd7 Regulates Nrf2 Signaling Pathway by Phenethyl Isothiocyanate and Ursolic Acid in Human Prostate Cancer Cells.

Histone Methyltransferase Setd7 Regulates Nrf2 Signaling Pathway by Phenethyl Isothiocyanate and Ursolic Acid in Human Prostate Cancer Cells.
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组蛋白甲基转移酶Setd7在人前列腺癌细胞中受异硫氰酸苯乙酯和熊果酸调控参与Nrf2信号通路 。

DOI:
10.1002/mnfr.201700840
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发表时间:
2018-09
影响因子:
5.2
通讯作者:
Kong AN
Kong AN
中科院分区:
农林科学2区
文献类型:
--
作者:
Wang C;Shu L;Zhang C;Li W;Wu R;Guo Y;Yang Y;Kong AN

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本研究旨在探讨含有赖氨酸甲基转移酶 7 (Setd7) 的表观遗传调节因子 SET 结构域在调节前列腺癌 (PCa) 细胞抗氧化剂 Nrf2 通路中的作用,并检测两种植物化学物质异硫氰酸苯乙酯 (PEITC) 和熊果酸 (UA) 的作用。 LNCaP 和 PC-3 细胞中慢病毒介导的 Setd7 shRNA 敲除降低了下游 Nrf2 靶标的表达,例如 NAD(P)H:醌氧化还原酶 1 (Nqo1) 和谷胱甘肽 S-转移酶 theta 2 (Gstt2)。 Setd7的下调降低了PCa细胞的软琼脂集落形成能力。 Setd7 的敲低增加了活性氧 (ROS) 的产生。此外,Setd7 敲低减弱了 H2O2 挑战下的 Nqo1 和 Gstt2 表达,而彗星实验中 Setd7 敲低细胞中观察到 DNA 损伤增加。有趣的是,Setd7 表达可以通过膳食植物化学物质 PEITC 和 UA 诱导。染色质免疫沉淀 (ChIP) 分析显示,Setd7 敲除降低了 Nrf2 和 Gstt2 启动子区域中 H3K4me1 的富集,而 PEITC 和 UA 处理则提高了富集。综上所述,这些结果表明 Setd7 敲低降低了 Nrf2 和 Nrf2 靶基因的表达,PEITC 和 UA 诱导 Setd7 表达,从而激活 Nrf2/抗氧化反应元件 (ARE) 信号通路并保护 DNA 免受氧化损伤。
This study aimed to investigate the role of the epigenetic regulator SET domain-containing lysine methyltransferase 7 (Setd7) in regulating the antioxidant Nrf2 pathway in prostate cancer (PCa) cells and examined the effects of two phytochemicals, phenethyl isothiocyanate (PEITC) and ursolic acid (UA). Lentivirus-mediated shRNA knockdown of Setd7 in LNCaP and PC-3 cells decreased the expression of downstream Nrf2 targets, such as NAD(P)H: quinone oxidoreductase 1 (Nqo1) and glutathione S-transferase theta 2 (Gstt2). Down-regulation of Setd7 decreased soft agar colony formation ability of PCa cells. Knockdown of Setd7 increased reactive oxygen species (ROS) generation. Furthermore, Setd7 knockdown attenuated Nqo1 and Gstt2 expression in response to H2O2 challenge, whereas increased DNA damage was observed in Setd7 knockdown cells in comet assay. Interestingly, Setd7 expression could be induced by the dietary phytochemicals PEITC and UA. Chromatin immunoprecipitation (ChIP) assays showed that Setd7 knockdown decreased H3K4me1 enrichment in the Nrf2 and Gstt2 promoter regions, while PEITC and UA treatments elevated the enrichment. Taken together, these results indicate that Setd7 knockdown decreases Nrf2 and Nrf2-target genes expression and that PEITC and UA induce Setd7 expression, which activates the Nrf2/antioxidant response element (ARE) signaling pathway and protects DNA from oxidative damage.
ursolic酸会抑制香烟提取物引起的人支气管上皮细胞损伤,并防止肺癌的发展。
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