RiboBio (Guangzhou, China) was commissioned to chemically synthesize biotinylated miR-503-5p. Biotinylation mutants and biotinylation NC were used as controls, and the mutated sequence was 3′-GACGUCUUGACAAGGGGCAGGUU-5′. The cells were transfected with these biotinylated oligonucleotides and maintained with M-280 streptavidin magnetic beads (Invitrogen, USA) to obtain the bound RNA,23 (link) and then qRT‒PCR was used to measure the level of ZSCAN16-AS1 in bound RNA.