GPT and neoplasm: There are studies which have shown that ALT exerts anti-tumor effects on tumor cells alone or when combined with other anti-tumor agents The mechanisms involved included regulation of oxygen species-mediated ER stress, ROS response, and modulation of other signaling pathways, such as the Akt/GSK3β, p38 MAPK, NF-κB, STAT3 and Nrf2 signaling pathways.