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Tyrosine-modified PEI: A novel and highly efficient vector for siRNA delivery in mammalian cells
Author(s) -
Gaëlle Creusat,
Guy Zuber
Publication year - 2008
Publication title -
nucleic acids symposium series
Language(s) - English
Resource type - Journals
eISSN - 1746-8272
pISSN - 0261-3166
DOI - 10.1093/nass/nrn047
Subject(s) - polyethylenimine , small interfering rna , gene delivery , tyrosine , chemistry , transfection , cationic polymerization , rna interference , cell culture , genetic enhancement , cell , rna , vector (molecular biology) , microbiology and biotechnology , biochemistry , biology , gene , recombinant dna , genetics , polymer chemistry
Delivery of synthetic small interfering RNA (siRNA) into cell remains the major obstacle to its biological activity. Cationic polymers, and in particular the "proton sponge" polyethylenimine (PEI), has shown promise for cancer gene therapy but appears inefficient for siRNA delivery. Here we report that modifying branched PEI with amino acids led to efficient siRNA delivery into mammalian cell lines, even in the presence of serum, and at dose as low as 1 nM.

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