吉林大学学报(医学版) ›› 2022, Vol. 48 ›› Issue (3): 718-727.doi: 10.13481/j.1671-587X.20220321

• 基础研究 • 上一篇    

miR-124-3p对口腔鳞状细胞癌细胞增殖和侵袭的抑制作用及其机制

吴壮志,贺小宁(),陈思祺   

  1. 海南医学院第二附属医院口腔科,海南 海口 570100
  • 收稿日期:2021-09-10 出版日期:2022-05-28 发布日期:2022-06-21
  • 通讯作者: 贺小宁 E-mail:hexiaoningvv@aliyun.com
  • 作者简介:吴壮志(1969-),男,海南省文昌市人,副主任医师,主要从事口腔内科疾病诊治方面的研究。
  • 基金资助:
    海南省科技厅自然科学基金高层次人才项目(820RC768)

Inhibitory effect of miR-124-3p on proliferation and invasion of oral squamous cell carcinoma cells and its mechanism

Zhuangzhi WU,Xiaoning HE(),Siqi CHEN   

  1. Department of Stomatology,Second Affiliated Hospital,Hainan Medical University,Haikou 570100,China
  • Received:2021-09-10 Online:2022-05-28 Published:2022-06-21
  • Contact: Xiaoning HE E-mail:hexiaoningvv@aliyun.com

摘要: 目的

观察微小RNA-124-3p(miR-124-3p)对口腔鳞癌(OSCC)HSC2和KON细胞增殖及侵袭的影响,并探讨其可能作用机制。

方法

实时荧光定量PCR(RT-qPCR)法检测OSCC组织和OSCC细胞中miR-124-3p和脑源性神经生长因子(BDNF)mRNA表达水平,分析miR-124-3p表达与OSCC患者生存率的关系,裸鼠成瘤实验分析各组裸鼠体内成瘤的体积和质量,Western blotting法检测HSC2和KON细胞中BDNF蛋白表达水平。将miR-124-3p 、miR-NC、inhibitor-NC、miR-124-3p inhibitor、siBDNF、BDNF和miR-124-3p+BDNF分别转染至HSC2及KON细胞作为miR-124-3p组、miR-NC组、inhibitor-NC组、miR-124-3p inhibitor组、siBDNF组、BDNF组及miR-124-3p+BDNF组。CCK-8法检测HSC2和KON细胞的细胞存活率,Transwell实验检测各组HSC2和KON细胞的细胞侵袭率。双荧光素酶报告基因实验检测miR-124-3p与BDNF的靶向关系,RNA免疫沉淀实验检测miR-124-3p与BDNF的靶向关系。

结果

OSCC组织、HSC2和KON细胞中miR-124-3p呈低表达,BDNF mRNA呈高表达,且miR-124-3p表达与OSCC患者生存率有关(P<0.05)。与miR-NC组比较,miR-124-3p组细胞存活率和细胞侵袭率降低(P<0.05),裸鼠肿瘤体积和质量降低(P<0.05)。与inhibitor-NC组比较,siBDNF组细胞存活率和细胞侵袭率降低(P<0.05)。与inhibitor-NC组比较,BDNF组细胞存活率和细胞侵袭率升高(P<0.05)。BDNF是miR-124-3p的潜在靶标。与miR-124-3p组比较,miR-124-3p+BDNF组细胞存活率和细胞率侵袭升高(P<0.05)。

结论

miR-124-3p可抑制OSCC细胞的增殖和侵袭,其作用机制可能与靶向结合BDNF有关。

关键词: 口腔鳞状细胞癌, 微小RNA-124-3p, 脑源性神经营养因子, 细胞增殖, 细胞侵袭

Abstract: Objective

To observe the effect of microRNA-124-3p (miR-124-3p) on the proliferation and invasion of oral squamous cell carcinoma (OSCC) HSC2 and KON cells, and to explore its possible mechanism.

Methods

The expression levels of miR-124-3p and brain-derived nerve growth factor (BDNF) mRNA in the OSCC tissue and OSCC cells were detected by real-time fluorescence quantitative PCR (RT-qPCR) method, and the relationship between the expression of miR-124-3p and the survival rate of the OSCC patients was analyzed;the volumes and masses of tumor of the nude mice in various groups were analyzed;the expression levels of BDNF protein in HSC2 and KON cells were detected by Western blotting method;the HSC2 and KON cells were divided into miR-124-3p group(transfected miR-124-3p),miR-NC group(transfected with miR-NC),inhibitor-NC(transfected with inhibitor-NC),miR-124-3p inhibitor group(transfected with miR-124-3p inhibitor),siBDNF group(transfected with siBDNF),BDNF group(transfected with BDNF),and miR-124-3p+BDNF group(transfected with miR-124-3+BDNF).The survival rates of the HSC2 and KON cells were detected by CCK-8 method,and the invasion rates of HSC2 and KON cells in various groups were detected by Transwell experiment; the targeting relationship between miR-124-3p and BDNF was also detected by double luciferase reporter gene experiment, and the targeting relationship between miR-124-3p and BDNF was detected by RNA immunoprecipitation experiment.

Results

The expressions of miR-124-3p in OSCC tissue and HSC2 and KON cells were low, and the expression of BDNF mRNA was high;the expression of miR-124-3p was correlated with the survival rate of the OSCC patients(P<0.05). Compared with miR-NC group, the survival rates and the invasion rates of the HSC2 and KON cells in miR-124-3p group were decreased (P<0.05), and the tumor volumes and mass of the nude mice were decreased (P<0.05). Compared with inhibitor-NC group, the survival rates and the invasion rates of the HSC2 and KON cells in siBDNF group were decreased (P<0.05). Compared with inhibitor-NC group, the survival rates and the invasion rates of the HSC2 and KON cells in BDNF group were increased (P<0.05).BDNF was a potential target of miR-124-3p. Compared with miR-124-3p group, the survival rates and the invasion rates of the HSC2 and KON cells in miR-124-3p+BDNF group were increased (P<0.05).

Conclusion

miR-124-3p can inhibit the proliferation and invasion of the OSCC cells, and its mechanism may be related to the targeted binding of BDNF.

Key words: Oral squamous cell carcinoma, MicroRNA-124-3p, Brain-derived neurotrophic factor, Cell proliferation, Cell invasion

中图分类号: 

  • R739.85