MTOR and neoplasm: Substantial evidence shows that some miRNAs (such as miR-1, miR-206, and miR-148a-3p) can suppress the proliferation, survival, invasion, and metastasis of ovarian cancer cells by directly targeting c-Met, and subsequently regulating downstream signaling pathway to serve as tumor suppressors such as PI3K/Akt/mTOR and ERK1/2 pathways (Qu et al., 2017; Dai et al., 2018; Wang W. et al., 2018).