MMP2 and neoplasm: The results showed that a large amount of T cells proliferated with great clonal diversity and superior cytotoxic activity.[113] Pd‐l1 inhibitory peptide (TPP1) and MMP2 substrate peptide (PLGLLG) have been conjugated to the tumor cell membrane (SPIO NP@M‐P) to construct superparamagnetic iron oxide nanoparticles, which effectively extend the half‐life of the peptides and maintain their ability to reactivate T cells and inhibit tumor growth.[114] Zhang et al.