医学分子生物学杂志 ›› 2023, Vol. 20 ›› Issue (3): 202-208.doi: 10.3870/j.issn.1672-8009.2023.03.003

• 论著 • 上一篇    下一篇

miR-27b-3p 靶向 HOXB8 调节口腔鳞癌耐药细胞的增殖、凋亡和顺铂耐药性 

  

  1. 河北医科大学第一医院1口腔二科, 2口腔一科, 3中心实验室 石家庄市, 050000
  • 出版日期:2023-05-31 发布日期:2023-05-29
  • 基金资助:
    河北省 2022 年度医科科学研究课题 (No. 20221387)

miR-27b-3p Regulates Proliferation, Apoptosis and Cisplatin Resistance of Oral Squamous Cell Carcinoma-resistant Cells by Targeting HOXB8

  1. 1The Second Department of Stomatology, 2the First Department of Stomatology, 3Central Laboratory, the First Hospital of Hebei Medical University, Shijiazhuang, 050000, China
  • Online:2023-05-31 Published:2023-05-29

摘要: 目的 探究 miR-27b-3p 在口腔鳞癌 (oral squamous cell carcinoma, OSCC) 耐药细胞增殖、 凋亡和顺铂 (cisplatin, DDP) 耐药性中的作用及潜在的机制。 方法 RT-qPCR 检测 miR-27b-3p 和 HOXB8 mRNA 的表达; Western 印迹分析 HOXB8 及耐药蛋白 MRP1 的表达; CCK-8 分析细胞活力, 克隆形成实验分析 细胞增殖, 流式细胞仪检测细胞凋亡。 miR-27b-3p 和 HOXB8 之间的相互作用通过在线软件 Targetscan 预测 并通过双荧光素酶报告基因分析证实。 裸鼠异种移植模型测试 miR-27b-3p 在体内 OSCC DDP 耐药中的作 用。 结果 miR-27b-3p 在 DDP 耐药 OSCC 组织和 OSCC 细胞系中明显低表达, 且在 DDP 耐药 OSCC 细胞系 (CAL-27 / DDP) 中的表达明显低于正常 OSCC 细胞系 (CAL-27) (P< 0. 05); 而 HOXB8 mRNA 在 DDP 耐药 OSCC 组织和 OSCC 细胞系中明显高表达, 在 DDP 耐药 OSCC 细胞系 (CAL-27 / DDP) 中的表达明显高于正 常 OSCC 细胞系 (CAL-27) (P< 0. 05)。 miR-27b-3p 模拟物可明显抑制 CAL-27 / DDP 细胞活力、 克隆形成能 力和耐药蛋白 MRP1 的表达, 促进细胞凋亡 (P< 0. 05); 而 HOXB8 过表达可部分逆转 miR-27b-3p 模拟物 对 CAL-27 / DDP 细胞增殖、 凋亡以及耐药性的影响 (P< 0. 05)。 HOXB8 与 miR-27b-3p 存在靶向调控作用。 瘤内注射 miR-27b-3p agomir 显著缓解了体内异种移植耐药细胞的生长, 同时降低了 HOXB8 和 MRP1 的表 达 (P< 0. 05)。 结论 miR-27b-3p 可能通过靶向 HOXB8 调节 OSCC 耐药细胞的增殖、 凋亡和 DDP 耐药性。

关键词: miR-27b-3p, HOXB8, 口腔鳞癌, 增殖, 凋亡, 耐药性

Abstract: Objective To explore the role and potential mechanism of miR-27b-3p in the proliferation, apoptosis and cisplatin (DDP) resistance of oral squamous cell carcinoma (OSCC) resistant cells. Methods RT-qPCR was applied to detect the expression of miR-27b-3p and HOXB8 mRNA. Western blotting was applied to detect the expression of HOXB8 and drug resistance protein MRP1. CCK-8 assay was conducted to measure the cell viability, colony formation assay was used to analyze cell proliferation, and flow cytometry to detect apoptosis. The interaction between miR-27b-3p and HOXB8 was predicted by the online software Targetscan and confirmed by dual-luciferase reporter gene assay. A nude mouse xenograft model was used to test the role of miR-27b-3p in OSCC DDP resistance in vivo. Results The expression level of miR-27b-3p was obviously lower in DDP resistant OSCC tissues and OSCC cell lines, and the expression level in DDP-resistant OSCC cell lines (CAL-27 / DDP) was obviously lower than that in normal OSCC cell lines (CAL-27) (P < 0. 05). HOXB8 mRNA, by contrast, was highly expressed in DDP-resistant OSCC tissues and OSCC cell lines, and the expression in DDP-resistant OSCC cell line (CAL-27 / DDP) was obviously higher than that in normal OSCC cell line (CAL-27) (P < 0. 05). miR-27b-3p mimic could obviously inhibit the cell viability, colony formation ability and the expression of drug resistance protein MRP1 in CAL-27 / DDP cells, and promote the cell apoptosis (P < 0. 05) . Overexpression of HOXB8 could partially reverse the effects of miR-27b-3p mimics on the proliferation, apoptosis and drug resistance in CAL-27 / DDP cells (P< 0. 05). HOXB8 had a targeted regulatory role with miR-27b-3p. Intratumoral injection of miR-27b-3p agomir obviously alleviated the growth of resistant cells in the xenograft in vivo, and reduce the expression level of HOXB8 and MRP1 (P< 0. 05). Conclusion miR-27b-3p may regulate the proliferation, apoptosis and DDP resistance of OSCC drug resistant cells by targeting HOXB8.

Key words: miR-27b-3p, HOXB8, oral squamous cell carcinoma, proliferation, apoptosis; drug resistance

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