Efficient co-delivery of neo-epitopes using dispersion-stable layered double hydroxide nanoparticles for enhanced melanoma immunotherapy

Biomaterials
Ling-Xiao ZhangRui-Tian Liu

Abstract

Cancer immunotherapy has shown tremendous progresses in recent years for various cancers and layered double hydroxide (LDH) nanoparticles are demonstrated as effective adjuvants for protein-based vaccines. This research further shows that the colloidal stability of LDH-based vaccines significantly influences the therapeutic efficacy and LDH nanoparticles are able to adjuvant multiple tumor-associated antigen peptides to provoke strong cell-mediated immune responses for effective inhibition of cancer growth. The LDH-based multi-target therapeutic vaccines were constructed by assembling epitope peptides and CpG onto LDH nanoparticles. Using melanoma as the model cancer and Tyrosinase-related protein 2 (Trp2) peptide as the model antigen, we demonstrated that dispersion-stable LDH-based vaccine induced stronger cytotoxic T-lymphocyte (CTL) responses and significantly inhibited tumor growth in comparison with aggregated LDH-based vaccine. We further constructed multi-target dispersion-stable LDH-based vaccine by co-loading Trp2, two mutated epitopes (M27 and M30) and CpG, which showed remarkable inhibition of melanoma growth. These results suggest that dispersion-stable LDH nanoparticles are an ideal platform to load multi-antigens...Continue Reading

Citations

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