Self-Amplifying Replicon RNA Vaccine Delivery to Dendritic Cells by Synthetic Nanoparticles

Vaccines

Kenneth C. McCullough¹  Panagiota Milona²  Lisa Thomann-Harwood²  Thomas Démoulins²  Pavlos Englezou²  Rolf Suter¹ 

[1] Institute of Virology and Immunology, CH-3147 Mittelhaeusern, Switzerland;

关键词: self-replicating replicon RNA;    targeting dendritic cells;    nanoparticle delivery;   

DOI  :  10.3390/vaccines2040735

来源: mdpi

【 摘 要 】

Dendritic cells (DC) play essential roles determining efficacy of vaccine delivery with respect to immune defence development and regulation. This renders DCs important targets for vaccine delivery, particularly RNA vaccines. While delivery of interfering RNA oligonucleotides to the appropriate intracellular sites for RNA-interference has proven successful, the methodologies are identical for RNA vaccines, which require delivery to RNA translation sites. Delivery of mRNA has benefitted from application of cationic entities; these offer value following endocytosis of RNA, when cationic or amphipathic properties can promote endocytic vesicle membrane perturbation to facilitate cytosolic translocation. The present review presents how such advances are being applied to the delivery of a new form of RNA vaccine, replicons (RepRNA) carrying inserted foreign genes of interest encoding vaccine antigens. Approaches have been developed for delivery to DCs, leading to the translation of the RepRNA and encoded vaccine antigens both in vitro and in vivo. Potential mechanisms favouring efficient delivery leading to translation are discussed with respect to the DC endocytic machinery, showing the importance of cytosolic translocation from acidifying endocytic structures. The review relates the DC endocytic pathways to immune response induction, and the potential advantages for these self-replicating RNA vaccines in the near future.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.