As described in detail previously (19 (link)), oligo-dT and random primers were used to reverse transcribe RNA with qScript Flex cDNA kit (Quantabio) according to the manufacturer’s instructions. To investigate whether increased Wnt pathway activation led to increased sensitivity to drugs that affected the Wnt pathway, quantitative RT-PCR (qRT-PCR) was performed using gene-specific primers (Table S1 in Supplementary Material) and Sybr Green MasterMix (Life Technologies), and expression values were normalized relative to GAPDH and HPRT RNA expression.
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