NNT and osteosarcoma: A study in 2019 identified miR-320a as a tumor suppressor by showing that miR-320a overexpression reversed nicotinamide nucleotide transhydrogenase antisense RNA 1 (NNT-AS1)-induced proliferation, survival and mobility of the osteosarcoma cell line U2OS and that a miR-320 inhibitor partially rescued these functions of OS-732 cells [26].