Fig. 11

Schematic diagram of PEI based biomaterials for tumor immunotherapy. A Schematic illustration of α-PDL1/PEIGel for boosting and enhancing ICB therapy. B Antitumor efficacy of the α-PDL1/PEIGel in a 4T1 allograft murine model. (a) Schematic diagram of the animal experiment. (b) Individual tumor volumes. (c) Tumor growth curves of 4T1 tumor-bearing mice with different treatments for 44 days. (d) Kaplan—Meier survival analysis of 4T1 tumor-bearing mice. (Reproduced with permission from [107] Copyright © 2022, Elsevier)