Journal
EXPERT REVIEW OF VACCINES
Volume 14, Issue 2, Pages 221-234Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1586/14760584.2015.986104
Keywords
dendritic cells; glycomimetics; glycotargeting; histidine; lipid-based formulations; lipoplexes; lipopolyplexes; mannose receptors; pH-sensitive delivery; RNA vaccines
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Funding
- Ligue contre le Cancer, EU [FP7-HEALTH-2013_INNOVATION-1, 601738]
- ARD 2020 Biomedicaments (Region Centre, France)
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Synthetic mRNAs can become biopharmaceutics allowing vaccination against cancer, bacterial and virus infections. Clinical trials with direct administration of synthetic mRNAs encoding tumor antigens demonstrated safety and induction of tumor-specific immune responses. Although immune responses are generated by naked mRNAs, their formulations with chemical carriers are expected to provide more specificity and internalization in dendritic cells (DCs) for better immune responses and dose reduction. This review reports lipid-based formulations (LBFs) that have proved preclinical efficacy. The selective delivery of mRNA LBFs to favor intracellular accumulation in DCs and reduction of the effective doses is discussed, notably to decorate LBFs with carbohydrates or glycomimetics allowing endocytosis in DCs. We also report how smart intracellular delivery is achieved using pH-sensitive lipids or polymers for an efficient mRNA escape from endosomes and limitations regarding cytosolic mRNA location for translation.
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