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南京医科大学学报(自然科学版)                                  第43卷第2期
               ·196 ·                     Journal of Nanjing Medical University(Natural Sciences)   2023年2月


             ·基础医学·


              环状RNA FAT1(hsa_circ_0001461)通过调控miR⁃181d⁃5p/miR⁃
              199a⁃5p促进口腔鳞状细胞癌进展



              陈吉俊 ,王 梁 ,马诞骅 ,高红燕 ,石宇远                1*
                             1
                     1
                                             2
                                     2
               中国科学院大学宁波华美医院口腔科,浙江                  宁波   315000;浙江省消化系统肿瘤诊治及研究重点实验室,浙江                     宁波
              1                                                 2
              315000

             [摘    要] 目的:探讨环状 RNA FAT1(hsa_circ_0001461)⁃miR⁃181d⁃5p/miR⁃199a⁃5p 轴在口腔鳞状细胞癌(oral squamous cell
              carcinoma,OSCC)细胞生物学功能中的作用及机制。方法:收集 30 例 OSCC 患者的临床组织,采用实时定量 PCR 检测 circ⁃
              FAT1、miR⁃181d⁃5p及miR⁃199a⁃5p在OSCC组织和细胞中的表达。通过StarBase 和双荧光素酶报告基因实验验证 miR⁃181d⁃
              5p/miR⁃199a⁃5p与circFAT1的靶向关系。利用CCK⁃8、Transwell、流式细胞术检测 circFAT1⁃miR⁃181d⁃5p/miR⁃199a⁃5p轴对于
              OSCC细胞活力、迁移、侵袭、凋亡和周期的影响。采用免疫印迹法结合LY294002处理检测PI3K/Akt/mTOR信号通路相关蛋白
              的表达。结果:在OSCC中circFAT1表达升高,miR⁃181d⁃5p、miR⁃199a⁃5p表达下降(P < 0.001)。circFAT1可以同时靶向miR⁃
              181d⁃5p和miR⁃199a⁃5p(P < 0.01)。沉默circFAT1、过表达miR⁃181d及miR⁃199a⁃5p抑制了OSCC细胞活力、迁移、侵袭和周期
              进展、诱导凋亡,同时抑制 PI3K/Akt/mTOR 通路的激活;过表达 circFAT1、抑制 miR⁃181d⁃5p 及 miR⁃199a⁃5p 则发挥相反作用
             (P < 0.05)。miR⁃181d⁃5p、miR⁃199a⁃5p可部分逆转circFAT1对OSCC细胞生物学功能的影响(P<0.05)。LY294002预处理逆转
              了过表达circFAT1对PI3K/Akt/mTOR通路和细胞活力的影响(P < 0.05)。结论:circFAT1通过调控miR⁃181d⁃5p和miR⁃199a⁃5p
              促进OSCC细胞恶性进展。
             [关键词] 口腔鳞状细胞癌;hsa_circ_0001461;miR⁃181d⁃5p;miR⁃199a⁃5p;环状RNA
             [中图分类号] R739.85                   [文献标志码] A                       [文章编号] 1007⁃4368(2023)02⁃196⁃11
              doi:10.7655/NYDXBNS20230207



              Circular RNA FAT1(hsa_circ_0001461)promotes the progression of oral squamous cell
              carcinoma by regulating miR⁃181d⁃5p/miR⁃199a⁃5p

                        1            1          2             2           1*
              CHEN Jijun ,WANG Liang ,MA Danhua ,GAO Hongyan ,SHI Yuyuan
              1 Department of Stomatology,Ningbo Huamei Hospital,University of Chinese Academy of Sciences,Ningbo 315000;
              2 Zhejiang Provincial Key Laboratory of Diagnosis,Treatment and Research of Digestive System Tumors,Ningbo
              315000,China



             [Abstract] Objective:To explore the role and mechanism of circular RNA FAT1(hsa_circ_0001461)⁃miR⁃181d⁃5p/miR⁃199a⁃5p
              axis in the biological functions of oral squamous cell carcinoma(OSCC)cells. Methods:The clinical tissues of 30 OSCC patients were
              collected,and the expressions of circFAT1,miR⁃181d⁃5p and miR⁃199a⁃5p in OSCC tissues and cells were detected by real⁃time
              quantitative PCR. starBase and dual luciferase reporter genes were used to verify the targeting relationship between miR⁃181d⁃5p/miR⁃
              199a⁃5p and circFAT1. Functional experiments include CCK⁃8,Transwell,and flow cytometry to detect the effects of circFAT1⁃miR⁃
              181d⁃5p/miR⁃199a⁃5p axis on OSCC cell viability,migration,invasion,apoptosis and cycle. Western blot combined with LY294002
              treatment was used to detect the expression of PI3K/Akt/mTOR signaling pathway related proteins. Results:The circFAT1 expression
              increased,and miR⁃181d⁃5p and miR⁃199a⁃5p expressions decreased in OSCC(P < 0.001). CircFAT1 could target miR⁃181d⁃5p and
              miR⁃199a⁃5p(P < 0.01). Silencing circFAT1,miR⁃181d⁃5p mimic and miR⁃199a⁃5p mimic inhibited OSCC cell viability,migration,
              invasion and cycle progression,induced apoptosis,and inhibited the activation of PI3K/Akt/mTOR pathway;overexpressed circFAT1,


             [基金项目] 浙江省医药卫生科技计划项目(2021KY297);宁波市医学重点扶植学科(2022⁃F20)
              ∗
              通信作者(Corresponding author),E⁃mail:syycjj2009@163.com
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