实用医学杂志 ›› 2024, Vol. 40 ›› Issue (20): 2819-2827.doi: 10.3969/j.issn.1006-5725.2024.20.002

• 基础研究 • 上一篇    下一篇

LncRNA FOXP4-AS1调控EZH2/LATS2轴对膀胱尿路上皮癌细胞增殖与迁移的影响

向威,吕磊,郑福鑫,袁敬东,周高峰()   

  1. 武汉市第一医院泌尿外科 (湖北 武汉 430022 )
  • 收稿日期:2024-05-15 出版日期:2024-10-25 发布日期:2024-11-05
  • 通讯作者: 周高峰 E-mail:joe@126.com;maja-joe@126.com
  • 基金资助:
    国家自然科学基金项目(81502204);湖北省卫健委2021-2022年度青年人才项目(WJ2021Q001)

Effects of LncRNA FOXP4⁃AS1 regulating EZH2/LATS2 axis on proliferation and migration of bladder urothelial cancer cells

Wei XIANG,Lei LYU,Fuxin ZHENG,Jingdong YUAN,Gaofeng ZHOU()   

  1. Hospital,Wuhan 430022,Hubei,China
  • Received:2024-05-15 Online:2024-10-25 Published:2024-11-05
  • Contact: Gaofeng ZHOU E-mail:joe@126.com;maja-joe@126.com

摘要:

目的 分析lncRNA FOXP4-AS1调控EZH2/LATS2轴对膀胱尿路上皮癌(bladder urothelial carcinoma,BUC)细胞增殖与迁移的影响。 方法 利用TCGA数据库与实时荧光定量PCR分析FOXP4-AS1和LATS2 mRNA在BUC组织中的表达;MTT实验检测细胞增殖;Transwell实验检测细胞迁移;Western blot检测LATS2与H3K27me3蛋白表达;RNA免疫沉淀(RIP)和染色质免疫沉淀(ChIP)验证FOXP4-AS1、EZH2与LATS2的关系。 结果 相较正常膀胱组织,BUC组织中FOXP4-AS1表达升高,而LATS2 mRNA表达降低(P < 0.01);相较SV-HUC-1,FOXP4-AS1在BUC细胞系(EJ、T24、BIU-87及5637)中表达升高(P < 0.01);沉默FOXP4-AS1可显著抑制BUC细胞增殖、迁移及H3K27me3蛋白表达,而显著促进LATS2 mRNA与蛋白的表达,过表达FOXP4-AS1则产生相反效应(P < 0.05);RIP与ChIP实验表明FOXP4-AS1可募集EZH2至LATS2启动子区域,导致H3K27me3在该区域富集;敲低LATS2 或EZH2表达可部分逆转FOXP4-AS1沉默或过表达对BUC细胞增殖、迁移及LATS2表达的影响。 结论 FOXP4-AS1在BUC中高表达,其通过招募EZH2至LATS2基因启动子区域负性调控LATS2的表达,进而调控BUC细胞的增殖与迁移。

关键词: 膀胱尿路上皮癌, FOXP4-AS1, EZH2, LATS2

Abstract:

Objective To investigate the impact of LncRNA FOXP4-AS1 regulating the EZH2/LATS2 axis on the proliferation and migration of bladder urothelial carcinoma (BUC) cells. Methods The Cancer Genome Atlas (TCGA) database and real-time quantitative PCR were utilized to analyze the expression of FOXP4-AS1 and LATS2 mRNA in BUC tissues. Cell proliferation was observed using MTT experiments, and migration was checked using Transwell assays. Western blot assays were performed to determine the expression of LATS2 and H3K27me3 proteins. RNA immunoprecipitation (RIP) and chromatin immunoprecipitation (ChIP) assays were employed to verify the relationship between FOXP4-AS1, EZH2 and LATS2. Results Compared with normal bladder tissues, FOXP4-AS1 expression was increased in tumor tissues, while LATS2 mRNA expression was decreased (P < 0.01). Moreover, FOXP4-AS1 expression was elevated in EJ, T24, BIU-87, and 5637 cell lines compared to SV-HUC-1 (P < 0.01). The inhibition of FOXP4-AS1 resulted in a significant decrease in the proliferation, migration, and expression of H3K27me3 protein in BUC cells, while concurrently upregulating the expression of LATS2 mRNA and protein. Conversely, the overexpression of FOXP4-AS1 yielded contrasting effects (P < 0.05). RIP and ChIP assays revealed that FOXP4-AS1 could recruit EZH2 to the promoter region of LATS2, leading to an enrichment of H3K27me3 in this region. Interference with LATS2 or EZH2 expression partially reversed the effects of FOXP4-AS1 silencing or overexpression on the proliferation and migration of BUC cells, with concomitant effects on LATS2 expression. Conclusion FOXP4-AS1 demonstrates a notable increase in expression in BUC, leading to a suppression of LATS2 expression through the recruitment of EZH2 to the promoter region of LATS2. This regulatory process ultimately influences the proliferation and migration of BUC cells.

Key words: bladder urothelial carcinoma, FOXP4-AS1, EZH2, LATS2

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