Probes, including biotinylated miR-526b-3p WT and biotinylated miR-526b-3p Mut, or control probes purchased from RiboBio (Guangzhou, China) were transfected into U87 and U251 cells. Then, DNaseI was added to RNA solution, and incubation was for 5 min at 65°C. Afterwards, streptavidin-coated magnetic beads (New England BioLabs, USA) were incubated for another 4 h. Finally, the beads were washed with PBS and extracted RNA. MiR-526b-3p enrichment was detected via RT-qPCR analysis [19 (link)].
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