MTPAP and neoplasm: To investigate whether localized implantation of PLX-NP@Gel could enhance the anti-tumor effect of the systemic injection of P-aPD-1, the therapeutic efficacy of PLX-NP@Gel and systemic administration of P-aPD-1 (designated PLX-NP@Gel+P-aPD-1) was evaluated in the B16F10 tumor recurrence model.