Prediction and validation of Let-7g-5p potential target genes and the effects on SUNE1 cells. (A) Searching for the target gene of Let-7g-5p in the database TargetScan, miRDB, TargetMiner. (B) Dual-luciferase reporter assay was used to verify that Let-7g-5p directly regulated IGF-1R expression by 3′UTR. (C–E) RT-qPCR and western blot were used to detect the expression levels of IGF-1R mRNA and protein in the 5 groups. (F) CCK-8 assay was used to detect the cell viability in the 5 groups. * P<0.05, ** P<0.01, versus control group; #
P<0.05, ##
P<0.01, versus Let-7g-5p mimics group; ^
P<0.05, ^^
P<0.01, versus IGF-1R group. RT-qPCR – real-time quantitative polymerase chain reaction; CCK-8 – cell counting kit-8.