Article ; Online: Poly(2-oxazoline)-Based Polyplexes as a PEG-Free Plasmid DNA Delivery Platform.
2023 Volume 23, Issue 11, Page(s) e2300177
Abstract: The present study expands the versatility of cationic poly(2-oxazoline) (POx) copolymers as a polyethylene glycol (PEG)-free platform for gene delivery to immune cells, such as monocytes and macrophages. Several block copolymers are developed by varying ... ...
Abstract | The present study expands the versatility of cationic poly(2-oxazoline) (POx) copolymers as a polyethylene glycol (PEG)-free platform for gene delivery to immune cells, such as monocytes and macrophages. Several block copolymers are developed by varying nonionic hydrophilic blocks (poly(2-methyl-2-oxazoline) (pMeOx) or poly(2-ethyl-2-oxazoline) (pEtOx), cationic blocks, and an optional hydrophobic block (poly(2-isopropyl-2-oxazoline) (iPrOx). The cationic blocks are produced by side chain modification of 2-methoxy-carboxyethyl-2-oxazoline (MestOx) block precursor with diethylenetriamine (DET) or tris(2-aminoethyl)amine (TREN). For the attachment of a targeting ligand, mannose, azide-alkyne cycloaddition click chemistry methods are employed. Of the two cationic side chains, polyplexes made with DET-containing copolymers transfect macrophages significantly better than those made with TREN-based copolymer. Likewise, nontargeted pEtOx-based diblock copolymer is more active in cell transfection than pMeOx-based copolymer. The triblock copolymer with hydrophobic block iPrOx performs poorly compared to the diblock copolymer which lacks this additional block. Surprisingly, attachment of a mannose ligand to either copolymer is inhibitory for transfection. Despite similarities in size and design, mannosylated polyplexes result in lower cell internalization compared to nonmannosylated polyplexes. Thus, PEG-free, nontargeted DET-, and pEtOx-based diblock copolymer outperforms other studied structures in the transfection of macrophages and displays transfection levels comparable to GeneJuice, a commercial nonlipid transfection reagent. |
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MeSH term(s) | Polyethylene Glycols/chemistry ; Ligands ; Mannose ; Plasmids/genetics ; Polymers/chemistry ; DNA/chemistry ; Transfection |
Chemical Substances | Polyethylene Glycols (3WJQ0SDW1A) ; poly(2-oxazoline) ; Ligands ; Mannose (PHA4727WTP) ; Polymers ; DNA (9007-49-2) |
Language | English |
Publishing date | 2023-07-26 |
Publishing country | Germany |
Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S. |
ZDB-ID | 2039130-4 |
ISSN | 1616-5195 ; 1616-5187 |
ISSN (online) | 1616-5195 |
ISSN | 1616-5187 |
DOI | 10.1002/mabi.202300177 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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