Biomimetic nanocomposites are widely used in the biomedical field because they can effectively solve the problems existing in the current
cancer treatment by realizing multi-mode collaborative treatment. In this study, we designed and synthesized a multifunctional therapeutic platform (PB/PM/HRP/
Apt) with unique working mechanism and good
tumor treatment effect.
Prussian blue nanoparticles (PBs) with good photothermal conversion efficiency were used as nuclei and coated with platelet membrane (PM). The ability of platelets (PLTs) to specifically target
cancer cells and inflammatory sites can effectively enhance PB accumulation at
tumor sites. The surface of the synthesized nanocomposites was modified with
horseradish peroxidase (HRP) to enhance the deep penetration of the nanocomposites in
cancer cells. In addition, PD-L1 aptamer and 4T1 cell aptamer
AS1411 were modified on the nanocomposite to achieve
immunotherapy and enhance targeting. The particle size, UV absorption spectrum and Zeta potential of the biomimetic nanocomposite were determined by transmission electron microscope (TEM), Ultraviolet-visible (UV-Vis) spectrophotometer and nano-particle size meter, and the successful preparation was proved. In addition, the biomimetic nanocomposites were proved to have good photothermal properties by infrared thermography. The cytotoxicity test showed that it had a good killing ability of
cancer cells. Finally, thermal imaging,
tumor volume detection,
immune factor detection and Haematoxilin-
Eosin (HE) staining of mice showed that the biomimetic nanocomposites had good anti-
tumor effect and could trigger immune response in vivo. Therefore, this biomimetic nanoplatform as a promising therapeutic strategy provides new inspiration for the current diagnosis and treatment of
cancer.