Endolysosomal-Escape Nanovaccines through Adjuvant-Induced Tumor Antigen Assembly for Enhanced Effector CD8+ T Cell Activation.

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Liping QiuMartijn Verdoes

Abstract

The activation of tumor-specific effector immune cells is key for successful immunotherapy and vaccination is a powerful strategy to induce such adaptive immune responses. However, the generation of effective anticancer vaccines is challenging. To overcome these challenges, a novel straight-forward strategy of adjuvant-induced tumor antigen assembly to generate nanovaccines with superior antigen/adjuvant loading efficiency is developed. To protect nanovaccines in circulation and to introduce additional functionalities, a biocompatible polyphenol coating is installed. The resulting functionalizable nanovaccines are equipped with a pH (low) insertion peptide (pHLIP) to facilitate endolysosomal escape and to promote cytoplasmic localization, with the aim to enhance cross-presentation of the antigen by dendritic cells to effectively activate CD8+ T cell. The results demonstrate that pHLIP-functionalized model nanovaccine can induce endolysosomal escape and enhance CD8+ T cell activation both in vitro and in vivo. Furthermore, based on the adjuvant-induced antigen assembly, nanovaccines of the clinically relevant tumor-associated antigen NY-ESO-1 are generated and show excellent capacity to elicit NY-ESO-1-specific CD8+ T cell activ...Continue Reading

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Citations

Apr 25, 2020·Frontiers in Physiology·Madeleine Iafrate, Gilbert O Fruhwirth
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xiaotong LiZhenxin Wang
Nov 5, 2021·ACS Biomaterials Science & Engineering·Jorieke WeidenMartijn Verdoes

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