PRTN3 and neoplasm: The conclusion was further validated by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and H&E staining (Fig. 7f, Supplementary Fig. 39), which revealed that the tumor tissues of mice treated with NP4 exhibited the strongest green fluorescence (apoptotic cells), demonstrating the good anti-tumor activity of NP4.