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第43卷第2期     陈吉俊,王     梁,马诞骅,等. 环状RNA FAT1(hsa_circ_0001461)通过调控miR⁃181d⁃5p/miR⁃199a⁃5p
                  2023年2月         促进口腔鳞状细胞癌进展[J]. 南京医科大学学报(自然科学版),2023,43(2):196-206                    ·205 ·


                Akt/mTOR通路(P < 0.01,图6)。                          circFAT1增强的细胞活性,且与miR⁃181d⁃5p mimic
                2.7  LY294002 预处理对于 circFAT1/miR⁃181d⁃5p/         和miR⁃199a⁃5p mimic具有协同作用,进一步降低了
                miR⁃199a⁃5p轴的影响                                   细胞活性(P < 0.01,图7C)。
                    免疫印迹实验显示,LY294002 预处理 SCC⁃25
                                                                  3  讨 论
                细胞降低了过表达circFAT1激活的PI3K/Akt/mTOR
                通路,且与miR⁃181d⁃5p mimic和miR⁃199a⁃5p mimic              本研究在前期研究的基础上发现了一个在OSCC
                具有协同作用(P < 0.05,图 7A、B)。CCK⁃8 结果表                 中发挥作用的circRNA,即circFAT1,揭示了circFAT1
                明LY294002预处理SCC⁃25细胞部分抑制了过表达                      通过 miR⁃181d⁃5p/miR⁃199a⁃5p 轴调控 PI3K/Akt/



                A                               3 2                    2.5                    2.5
                                                                                              2.0
                                                                       1.5
                                                                                              1.5
                          FAT1+MC#1  FAT1+MC#1+LY294002  FAT1+miR⁃  181d⁃5p mimic  FAT1+miR⁃181d⁃ 5p mimic+LY294002  p⁃P13K/P13K  1 0  p⁃Akt/Akt 2.0  p⁃mTOR/mTOR  1.0
                                                                       1.0
                                                                                              0.5
                                                                       0.5
                                                                                              0.0
                                                                       0.0
                                                                                             FAT1+miR⁃181d⁃5p mimic
                                              FAT1+miR⁃181d⁃5p mimic
                                                                      FAT1+miR⁃181d⁃5p mimic
                    P13K           85 kDa     FAT1+MC#1               FAT1+MC#1               FAT1+MC#1
                   p⁃P13K          84 kDa
                     Akt           55 kDa   FAT1+MC#1+LY294002     FAT1+MC#1+LY294002      FAT1+MC#1+LY294002
                    p⁃Akt          56 kDa   FAT1+miR⁃181d⁃5p mimic+LY294002  FAT1+miR⁃181d⁃5p mimic+LY294002  FAT1+miR⁃181d⁃5p mimic+LY294002
                   mTOR            289 kDa
                  p⁃mTOR           289 kDa
                  GAPDH            36 kDa
                B                              2.0                     1.5                     1.5
                                               1.5
                                                                                               1.0
                                                                       1.0
                          FAT1+MC#2  FAT1+MC#2+LY294002  FAT1+miR⁃  199a⁃5p mimic  FAT1+miR⁃199a⁃ 5p mimic+LY294002  p⁃P13K/P13K  1.0  p⁃Akt/Akt  0.5  p⁃mTOR/mTOR  0.5
                                               0.5
                                               0.0
                                                                                               0.0
                                                                       0.0
                                                                      FAT1+miR⁃199a⁃5p mimic
                                                                                             FAT1+miR⁃199a⁃5p mimic
                                              FAT1+miR⁃199a⁃5p mimic
                    P13K           85 kDa     FAT1+MC#2               FAT1+MC#2               FAT1+MC#2
                   p⁃P13K          84 kDa
                     Akt           55 kDa   FAT1+MC#2+LY294002     FAT1+MC#2+LY294002      FAT1+MC#2+LY294002
                    p⁃Akt          56 kDa   FAT1+miR⁃199a⁃5p mimic+LY294002  FAT1+miR⁃199a⁃5p mimic+LY294002  FAT1+miR⁃199a⁃5p mimic+LY294002
                   mTOR            289 kDa
                  p⁃mTOR           289 kDa
                  GAPDH            36 kDa
                                      C    150                          150
                                           ( % )  100                  ( % )  100
                                           细胞相对活率  50                  细胞相对活率  50



                                                                          0
                                             0                          FAT1+MC#2
                                                                      FAT1+MC#2+LY294002
                                         FAT1+MC#1+LY294002
                                        FAT1+miR⁃181d⁃5p mimic+LY294002  FAT1+miR⁃199a⁃5p mimic+LY294002
                                           FAT1+miR⁃181d⁃5p mimic
                                                                        FAT1+miR⁃199a⁃5p mimic
                                           FAT1+MC#1




                 A、B:细胞转染前1 h加入LY294002处理(PI3K/Akt/mTOR抑制剂),免疫印迹实验检测PI3K/Akt/mTOR信号通路;C:CCK⁃8检测各组细胞活性。
                              图7   LY294002预处理SCC⁃25细胞对于circFAT1/miR⁃181d⁃5p/miR⁃199a⁃5p轴的影响
                           Figure 7  The effect of LY294002 pretreatment on the circFAT1/miR⁃181d⁃5p/miR⁃199a⁃5p axis
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