Western blot assay was conducted as previously described [24 (link)]. Antibodies used in this study were as follows: anti-GAPDH (10494-1-AP, Proteintech), anti-AKT (C67E7, Cell Signaling Technology), anti-pAKT (S473) (193H12, Cell Signaling Technology), anti-PI3K (Y388, Abcam), anti-PI3K (p110) (Y384, Abcam), anti-S1PR3 (EPR454, Abcam), anti-EGR2 (EPR4004, Abcam), anti-IGF2BP1 (22803-1-AP, Proteintech), anti-IGF2BP2 (11601-1-AP, Proteintech), anti-IGF2BP3 (14642-1-AP, Proteintech), anti-WTAP (10200-1-AP, Proteintech).
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