Tuning the pH-Switch of Supramolecular Polymer Carriers for siRNA to Physiologically Relevant pH.

Abstract:

:The preparation of histidine enriched dendritic peptide amphiphiles and their self-assembly into multicomponent pH-switchable supramolecular polymers is reported. Alternating histidine and phenylalanine peptide synthons allow the assembly/disassembly to be adjusted in a physiologically relevant range of pH 5.3-6.0. Coassembly of monomers equipped with dendritic tetraethylene glycol chains with monomers bearing peripheral primary amine groups leads to nanorods with a tunable cationic surface charge density. These surface functional supramolecular polycations are able to reversibly bind short interfering RNA (siRNA). The nanorod-like supramolecular polymers, their complexation with siRNA, and the pH-triggered assembly/disassembly of the supramolecular carriers are characterized via circular dichroism spectroscopy, gel electrophoresis, as well as transmission electron microscopy. Multicomponent supramolecular polymers represent a modular and promising strategy for applications as responsive carrier vehicles, codelivery strategies, and gene therapy.

journal_name

Macromol Biosci

authors

Ahlers P,Frisch H,Holm R,Spitzer D,Barz M,Besenius P

doi

10.1002/mabi.201700111

subject

Has Abstract

pub_date

2017-10-01 00:00:00

issue

10

eissn

1616-5187

issn

1616-5195

journal_volume

17

pub_type

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