Carvalho et al. reported that the tumor suppressor miR-101, which targets EZH2 (enhancer of zeste 2 polycomb repressive complex 2 subunit), COX-2 (cytochrome c oxidase subunit II), MCL-1 (myeloid cell leukemia 1) and FOS (FBJ osteosarcoma oncogene), has anti-proliferative and anti-metastatic functions in GC [117,118,119,120]. The gene discussed is MTCO2P12; the disease is gastric cancer.