For example, Nicotinamide nucleotide transhydrogenase-antisense 1 (NNT-AS1) overexpression has been observed in a variety of malignancies, including osteosarcoma, cervical cancer (CC), breast cancer (BC), colorectal cancer (CRC) [6], gastric cancer (GC), Hepatocellular carcinoma (HCC), and non-small cell lung cancer (NSCLC). The gene discussed is NNT-AS1; the disease is gastric cancer.