The lncRNA taurine up-regulated gene 1 (TUG1) is also associated with methotrexate resistance through its sponging activity on miRNA-186, which increases the expression of cytoplasmic polyadenylation element binding protein 2 (CPEB2) in colon cancer cell lines and in triple-negative breast cancer with increased metastasis [63]. The gene discussed is CPEB2; the disease is triple-negative breast carcinoma.