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Targeted delivery of tungsten oxide nanoparticles for multifunctional anti-tumor therapy via macrophages.

Biomaterials science (2018-04-14)
Bin Zheng, Yang Bai, Hongbin Chen, Huizhuo Pan, Wanying Ji, Xiaoqun Gong, Xiaoli Wu, Hanjie Wang, Jin Chang
ABSTRACT

Tumor-associated macrophages are highly versatile effector cells that have been used to kill tumor cells. Herein, the macrophages as cell-based biocarriers are used for the targeted delivery of photothermal reagents for promoting the efficiency of killing tumor cells by activating the anti-tumor immune response and photothermal therapy (PTT). In this design, macrophages cause the phagocytosis of tumor cells and activate the anti-tumor immune response by secreting plenty of cytokines. Meanwhile, to improve the tumor-killing effect and track the collaborative therapy system in vivo, a novel nanoplatform based on tungsten oxide (W18O49, WO) nanoparticles and fluorescent dyes loaded in polylactic-co-glycolic acid (PLGA) for PTT has been successfully constructed. Subsequently, the nanoparticles are swallowed by macrophages acting as cell-based biocarriers to target the tumor and promote solid tumor ablation in vivo in animal experiments. This system is expected to bring a huge application potential in the visually guided dual-modal therapeutic platform for tumor targeting therapy in vivo.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
1-Propanol, anhydrous, 99.7%
Sigma-Aldrich
Tungsten(VI) chloride, ≥99.9% trace metals basis

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