Issue 4, 2018

Stable and efficient generation of poly(β-amino ester)s for RNAi delivery

Abstract

Cationic polymers are promising delivery systems for RNAi due to their ease of manipulation, scale-up conditions and transfection efficiency. However, some properties, such as stability and targeting, remain challenging to overcome. In this report, different modifications in poly(β-amino ester) (pBAE) structures have been explored to overcome these limitations. Recent studies have demonstrated that hydrophobicity plays a key role in controlling electrostatic interactions of plasma proteins with nanoparticles. Results show that a slight increase in the polymer hydrophobicity increases its siRNA packaging capacity, stability, and transfection efficiency. Consequently, polyplexes prepared with these hydrophobic structures are functional after incubation times longer than 48 hours in serum-containing medium. In addition, newly designed polymers were end-modified using different oligopeptide moieties in order to confer cell-specificity, as previously reported. Therefore, it can be concluded that these newly optimized pBAE polymers present great potential as delivery vectors to specifically drive therapeutic RNA-based nucleic acids in a cell-specific manner under physiological conditions.

Graphical abstract: Stable and efficient generation of poly(β-amino ester)s for RNAi delivery

Supplementary files

Article information

Article type
Paper
Submitted
08 Febr. 2018
Accepted
17 Maijs 2018
First published
17 Maijs 2018
This article is Open Access
Creative Commons BY-NC license

Mol. Syst. Des. Eng., 2018,3, 677-689

Stable and efficient generation of poly(β-amino ester)s for RNAi delivery

P. Dosta, V. Ramos and S. Borrós, Mol. Syst. Des. Eng., 2018, 3, 677 DOI: 10.1039/C8ME00006A

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