ENPP1 and neoplasm: When introducing STF‐1623 to the incubation process of 2′3′‐cGAMP and exosomes, although the ISRE reporter activity was enhanced (Figure 2B), no activity change for control ADP was observed (Figure 2B), which indicated that tumor exosomal ENPP1 inhibited cGAS‐STING pathway by hydrolyzing 2′3′‐cGAMP.