ARG1 and cancer: The analysis of arginase-1 in THP1 cells incubated with cancer cells showed that it was higher after co-cultivation with A549shHsp70 and DLD1shHsp70 cells compared with “scr” cells (21.66% vs. 14.9% for THP1 cells incubated with A549sHsp70 and A549scr, respectively, and 24.06% vs. 19.17% for the DLD1 couple, see Figure 3D).