Gene Delivery in Vitro and in Vivo from Bioreducible Multilayered Polyelectrolyte Films of Plasmid DNA

Overview

Journal Biomaterials

Specialty Biomedical Engineering

Date 2008 Nov 18

PMID 19013638

Citations 23

Authors

Jenifer Blacklock

Ye-Zi You

Qing-Hui Zhou

Guangzhao Mao

David Oupicky

Affiliations

Soon will be listed here.

Abstract

Layer-by-layer (LbL) films were assembled on flexible stainless steel substrate using plasmid DNA and reducible hyperbranched poly(amido amine) (RHB) polycation. The films were characterized by XPS and their disassembly in reducing conditions confirmed by ellipsometry. Fibroblast and smooth muscle cell attachment and proliferation on DNA/RHB films were indistinguishable from those on control DNA/poly(ethylenimine) (PEI) films. In vitro transfection activity was evaluated using reporter plasmids encoding for secreted alkaline phosphatase (SEAP) and green fluorescent protein (GFP). DNA/RHB films showed higher and longer lasting transfection activity than control DNA/PEI films using SEAP plasmid. It was revealed through the use of GFP plasmid that DNA/RHB films transfected almost the entire cell population growing on the films. In vivo transfection activity was evaluated by subcutaneously implanting a stainless steel substrate coated with the DNA/RHB films containing SEAP plasmid DNA and measuring the levels of SEAP secreted into the blood circulation of rats. It was found that the plasma levels of SEAP peaked at approximately 160 ng SEAP/mL five days post-implantation.

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