Fig. 1

miR-138-5p is lowly expressed in PCa tissues and cell lines. a The heatmap of miRNAs expression profiles with PCa progression in TCGA database; b qRT-PCR was used to detect the expression level of miR-138-5p in PCa tissues and paracancerous tissues; c qRT-PCR was used to detect the difference expression of miR-138-5p in tissue samples of PCa patients with different clinicopathologic characteristics (tumor size, Gleason score, lymph node metastasis and bone metastasis); d Kaplan–Meier survival curve of PCa patients based on miR-138-5p expression; e qRT-PCR was used to detect the expression level of miR-138-5p in PCa cell lines. Data are mean ± SD, *p < 0.05, **p < 0.01, ***p < 0.001