miR-129-5p has been found downregulated in NSCLC; however, its upregulation inhibits tumor growth and generates chemoresistance by downregulating DLK1 (delta-like non-canonical Notch ligand 1), which suggest that miR-129-5p and DLK1 may play a relevant role in NSCLC and its treatment [54]. The gene discussed is DLK1; the disease is neoplasm.