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Bioreducible and acid-labile poly(amido amine)s for efficient gene delivery
Authors Yu Z, Yan J, You Y, Zhou Q
Received 24 August 2012
Accepted for publication 4 October 2012
Published 23 November 2012 Volume 2012:7 Pages 5819—5832
DOI https://doi.org/10.2147/IJN.S37334
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 3
Zhi-Qiang Yu,1 Jun-Jie Yan,1 Ye-Zi You,1,* Qing-Hui Zhou2,*
1Chinese Academy of Sciences, Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China; 2Department of Medicine, University of California at Los Angeles, Los Angeles, CA, USA
*These authors contributed equally to this work
Abstract: Intracellular processes, including endosomal escape and intracellular release, are efficiency-determining steps in achieving successful gene delivery. It has been found that the presence of acid-labile units in polymers can facilitate endosomal escape and that the presence of reducible units in polymers can lead to intracellular release. In this study, poly(amido amine)s with both bioreducible and acid-labile properties were synthesized to improve gene delivery compared with single-responsive carriers. Transfection and cytotoxicity were evaluated in three cell lines. The complexes of DNA with dual-responsive polymers showed higher gene transfection efficiency than single-responsive polymers and polyethylenimine. At the same time, these polymers were tens of times less cytotoxic than polyethylenimine. Therefore, a polymer that is both reducible and acid-labile is a promising material for efficient and biocompatible gene delivery.
Keywords: reducible, acid labile, gene delivery, dual-responsive, endosomal escape, intracellular release
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