Total RNA from cells was extracted using TRIzol reagent (Invitrogen, United States) as previously described [20 (link)]. The complementary DNA was synthesized with random hexamer primer using Verso cDNA Synthesis Kit (Thermo Fisher Scientific, United States). Quantitative real-time PCR (qRT-PCR) was carried out on ABI StepOne Plus real time PCR system (Applied Biosystems, United States) using SYBR mix kit (Thermo Fisher Scientific, United States) as previously described [21 (link)]. Primers for the 80 NEPC related chimeric RNAs were listed in Additional file 8: Table S1. Touch-down PCR (TD-PCR) was carried out using Platinum Taq High Fidelity Kit Invitrogen, United States. Primers for TMPRSS2-ERG (e1e4) and TMPRSS2-ERG (e2e4) were listed in Additional file 12: Table S5.
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