Targeting epigenetic modulation of cholesterol synthesis as a therapeutic strategy for head and neck squamous cell carcinoma.

Targeting epigenetic modulation of cholesterol synthesis as a therapeutic strategy for head and neck squamous cell carcinoma.
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针对胆固醇合成的表观遗传调节作为头颈鳞状细胞癌的治疗策略。

DOI:
10.1038/s41419-021-03760-2
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发表时间:
2021-05-13
影响因子:
9
通讯作者:
Wang X
Wang X
中科院分区:
生物学1区
文献类型:
--
作者:
Xu X;Chen J;Li Y;Yang X;Wang Q;Wen Y;Yan M;Zhang J;Xu Q;Wei Y;Chen W;Wang X

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组蛋白甲基转移酶EZH2通过H3赖氨酸27三甲基化使基因表达沉默,并已被认为是重要的抗肿瘤治疗靶点。然而,现有EZH2抑制剂的临床应用对于实体瘤的治疗并不令人满意。为了发现针对头颈部鳞状细胞癌(HNSCC)的新策略,我们在用EZH2抑制剂处理的HNSCC细胞中进行了基因组学、代谢组学和RNA组学研究。发现EZH2抑制剂强烈诱导胆固醇合成中基因的表达。通过广泛的药物筛选,我们发现抑制角鲨烯环氧酶(内源性胆固醇合成的关键酶)协同增加角鲨烯含量并增强HNSCC细胞对EZH2抑制剂的敏感性。我们的研究结果为开发EZH2抑制剂的新组合治疗HNSCC提供了实验和理论基础。
The histone methyltransferase EZH2 silences gene expression via H3 lysine 27 trimethylation and has been recognized as an important antitumour therapeutic target. However, the clinical application of existing EZH2 inhibitors is not satisfactory for the treatment of solid tumours. To discover novel strategies against head and neck squamous cell carcinoma (HNSCC), we performed genomics, metabolomics and RNA omics studies in HNSCC cells treated with EZH2 inhibitors. It was found that EZH2 inhibitors strongly induced the expression of genes in cholesterol synthesis. Through extensive drug screening we found that inhibition of squalene epoxidase (a key enzyme of endogenous cholesterol synthesis) synergistically increased the squalene content and enhanced the sensitivity of HNSCC cells to EZH2 inhibitors. Our findings provide an experimental and theoretical basis for the development of new combinations of EZH2 inhibitors to treat HNSCC.
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