miRNA microarray was conducted as described previously [68 (link)]. miRNAs were extracted using TRIzol®. RNA quantity and quality were determined using a NanoDrop 2000 spectrophotomer (Thermo Scientific). Affymetrix GeneChip® miRNA 2.0 arrays were used for genome-wide miRNA-expression analysis (15,644 probe sets for 131 organisms, including 1105 mature human miRNAs, 1105 human pre-miRNAs, 722 mature mouse miRNAs and 690 mouse pre-miRNAs) according to the instruction manual (Affymetrix, Santa Clara). Two biological repeats were used for each treatment.
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