CASC2 and colorectal carcinoma: LncRNA cancer susceptibility candidate 2 (CASC2) increases protein inhibitor of activated signal transducer and activator of transcription 3 (PIAS3) by serving as a specific sponge and ceRNA for miR-18a, ultimately prolonging G0/G1-S phase transition, inhibiting CRC cell proliferation and suppressing tumor growth [12].