MTOR and gastric cancer: XLOC_006753 is an up-regulated lncRNA in gastric cancer patients and 5-FU resistant cells SGC-7901/5-FU, which is not only correlated with tumor size, metastasis, TNM stage and worse prognosis in gastric cancer patients, but also contributed to 5-FU resistance by influencing cell cycle G1/S transition, apoptosis, some markers of MDR and EMT expression, as well as the PI3K/AKT/mTOR signaling [172].