Total RNA was extracted from cultured cells using TRIzol reagent (Invitrogen). The miRNA and mRNA levels were measured using a SYBR Green qPCR assay (TaKaRa, Dalian, China) following the methods described before34 (link). The expression of GAPDH (reference for mRNA determination) or RNU6B (reference for miRNA determination) served as an endogenous control. The sequences of the PCR primers are presented in Supplementary Table S1. The 2−ΔCT method was applied for data processing.
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