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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