Intracellularly Generated Immunological Gold Nanoparticles for Combinatorial Photothermal Therapy and Immunotherapy against Tumor

Nano Letters
Dan ZhangZhiping Zhang

Abstract

Gold nanoparticle (AuNP) has been widely used in cancer photothermal therapy (PTT) for ablating accessible tumor, while it is insufficient for inhibiting tumor metastasis and relapse in current stage. Here, we first developed a novel immunological AuNP through intracellular generation and exocytosis for combinatorial PTT and immunotherapy. Melanoma B16F10 cells were employed to generate AuNPs first and then shed nanoparticle trapped vesicles to extracellular environment with retained tumor antigens (AuNP@B16F10). By further introducing the nanoparticles into dendritic cells (DCs), DC-derived AuNPs (AuNP@DCB16F10) were generated with enhanced biosafety, which can induce hyperthermia and provoke antitumor immune responses. This immunological nanoplatform demonstrated efficient inhibition or even eradication of primary tumor, tumor metastasis, as well as tumor relapse, with significantly improved overall survival of mice. With our design, the intracellularly generated AuNPs with immunological property could act as an effective treatment modality for cancer.

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Citations

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