Reversible stabilization of DNA/PEI complexes by reducible click-linkage between DNA and polymer. A new polyplex concept for lowering polymer quantity.
Journal
Gene therapy
ISSN: 1476-5462
Titre abrégé: Gene Ther
Pays: England
ID NLM: 9421525
Informations de publication
Date de publication:
09 Feb 2023
09 Feb 2023
Historique:
received:
05
09
2022
accepted:
27
01
2023
revised:
18
01
2023
pubmed:
10
2
2023
medline:
10
2
2023
entrez:
9
2
2023
Statut:
aheadofprint
Résumé
Nonviral transfection of mammalian cells can be performed with electrostatic complexes (polyplexes) between a plasmid DNA (pDNA) encoding a foreign gene and a cationic polymer. However, an excess of the cationic polymer is required for pDNA condensation and polyplexes formation, which generate in vivo toxicity. Here, we present a new concept of polyplexes preparation aiming to reduce the polymer quantity. pDNA was functionalized with 3,6,9-trioxaundecan-1- {4 - [(2-chloroethyl) ethylamino)] - benzylamino}, 11-azide, and polyethyleneimine (lPEI) with reducible dibenzocyclooctyl (SS-DBCO) groups allowing azide-alkyne cycloaddition between pDNA and lPEI after condensation. The size of polyplexes with DBCO-SS-lPEI was smaller than with lPEI due to a stronger DNA condensation thanks to linkages between polymer and pDNA preventing dissociation until disulfide bridges reduction. In vitro transfection showed that the amount of DBCO-SS-lPEI leading to the most efficient polyplexes was three times lower than lPEI. As expected, toxicity in mice was significantly reduced upon intravenous injection of DBCO-SS-lPEI polyplexes at doses where the lPEI polyplexes killed mice. This is probably due to the high stability of the DBCO-SS-lPEI polyplexes which prevented their aggregation in the pulmonary capillaries. Overall, this new concept of polyplexes with DBCO-SS-lPEI offering the possibility of administering higher doses of polyplexes than lPEI and their ability to pass the pulmonary barrier could be favorably exploited for transfection of distant organs or tissues, such as tumors.
Identifiants
pubmed: 36755129
doi: 10.1038/s41434-023-00386-1
pii: 10.1038/s41434-023-00386-1
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2023. The Author(s), under exclusive licence to Springer Nature Limited.
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