GSTP1 and esophageal squamous cell carcinoma: Importantly, LINC01419 overexpression contributes to the diminished effect of 5-FU (10 μg/mL for 48 h) in ESCC cells by promoting the methylation of the promoter region of the glutathione S-transferase Pi 1 (GSTP1) gene [60] (Table 1).