Western blot analysis was conducted as described previously [18 (link)]. Briefly, PCa cells were lysed in RIPA buffer (#KGP250, KeyGEN) following the manufacturer’s instructions. Then, 25 µg of protein was separated by SDS‒PAGE and transferred to PVDF membranes (Millipore). Subsequently, membranes were blocked with 5% nonfat milk. After washing, the primary antibodies were immunoblotted. The following primary antibodies were used in this research: DDX17 (ab180190) was purchased from Abcam, and TGIF2 (sc -81,989) and GAPDH (sc -365,062) were purchased from Santa Cruz. After incubation overnight, HRP-conjugated anti-mouse (sc-2005) and anti-rabbit IgG (sc-2004) secondary antibodies (Santa Cruz) were added. Finally, the signals were visualized by Bio-Rad ChemiDoc XRS+.