The miR-21 expression and dual-luciferase reporter analysis (n = 4): (a) the qPCR analysis of miR-21 expression in each group; (b) dual-luciferase reporter analysis between miR-21 and PDCD4 (A represents values compared to the NC group, p < 0.05; B represents values compared to the HR group, p < 0.05; C represents values compared to the OE-PPARγ group, p < 0.05; D represents values compared to the sh-PPARγ group, p < 0.05; E represents values compared to the mimic group, p < 0.05; F represents values compared to the inhibitor group, p < 0.05; G represents values compared to the OE-PPARγ+HR group, p < 0.05; H represents values compared to the sh-PPARγ+HR group, p < 0.05; I represents values compared to the mimic+HR group, p < 0.05; J represents values compared to the inhibitor+HR group, p < 0.05; ∗∗ represents values compared to the NC mimics+m-Pdcd4-3′-UTR-wt group, p < 0.01).