The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
An Acid-Labile Block Copolymer of PDMAEMA and PEG as Potential Carrier for Intelligent Gene Delivery Systems
Abstract
Intelligent gene delivery systems based on physiologically triggered reversible shielding technology have evinced enormous interest due to their potential in vivo applications. In the present work, an acid-labile block copolymer consisting of poly(ethylene glycol) and poly(2-(dimethylamino)ethyl methacrylate) segments connected through a cyclic ortho ester linkage (PEG- a-PDMAEMA) was synthesized by atom transfer radical polymerization of DMAEMA using a PEG macroinitiator with an acid-cleavable end group. PEG- a-PDMAEMA condensed with plasmid DNA formed polyplex nanoparticles with an acid-triggered reversible PEG shield. The pH-dependent shielding/deshielding effect of PEG chains on the polyplex particles were evaluated by zeta potential and size measurements. At pH 7.4, polyplexes generated from PEG- a-PDMAEMA exhibited smaller particle size, lower surface charge, reduced interaction with erythrocytes, and less cytotoxicity compared to PDMAEMA-derived polyplexes. At pH 5.0, zeta potential of polyplexes formed from PEG- a-PDMAEMA increased, leveled up after 2 h of incubation and gradual aggregation occurred in the presence of bovine serum albumin (BSA). In contrast, the stably shielded polyplexes formed by DNA and an acid-stable block copolymer, PEG- b-PDMAEMA, did not change in size and zeta potential in 6 h. In vitro transfection efficiency of the acid-labile copolymer greatly increased after 6 h incubation at pH 5.0, approaching the same level of PDMAEMA, whereas there was only slight increase in efficiency for the stable copolymer, PEG- b-PDMAEMA.
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Citations
Cites
Design and development of polymers for gene delivery
Pack, D. W., Hoffman, A. S., Pun, S., & Stayton, P. S. (2005) · Nature Reviews Drug Discovery · doi:10.1038/nrd1775 · Cited by 2,568
Ogris, M., Brunner, S., Schüller, S., Kircheis, R., & Wagner, E. (1999) · Gene Therapy · doi:10.1038/sj.gt.3300900 · Cited by 1,178
Dash, P. R., Read, M. L., Barrett, L. B., Wolfert, M. A., & Seymour, L. W. (1999) · Gene Therapy · doi:10.1038/sj.gt.3300843 · Cited by 386
Cited by
Sharifi, S., Behzadi, S., Laurent, S., Laird Forrest, M., Stroeve, P., & Mahmoudi, M. (2012) · Chem. Soc. Rev. · doi:10.1039/c1cs15188f · Cited by 1,460
Stimuli-Responsive Polymersomes for Programmed Drug Delivery
Meng, F., Zhong, Z., & Feijen, J. (2009) · Biomacromolecules · doi:10.1021/bm801127d · Cited by 1,122
Mechanisms and biomaterials in pH-responsive tumour targeted drug delivery: A review
Kanamala, M., Wilson, W. R., Yang, M., Palmer, B. D., & Wu, Z. (2016) · Biomaterials · doi:10.1016/j.biomaterials.2016.01.061 · Cited by 1,004
Ge, Z., & Liu, S. (2013) · Chemical Society Reviews · doi:10.1039/c3cs60048c · Cited by 914
pH- and ion-sensitive polymers for drug delivery
Yoshida, T., Lai, T. C., Kwon, G. S., & Sako, K. (2013) · Expert Opinion on Drug Delivery · doi:10.1517/17425247.2013.821978 · Cited by 367
Metadata
- Authors
- Lin, S., Du, F., Wang, Y., Ji, S., Liang, D., Yu, L., & Li, Z.
- Venue
- Biomacromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-12-19
- Volume
- 9
- Issue
- 1
- Pages
- 109-115
- ISSN
- 1525-7797 (ISSN-L)
- 1526-4602
- OpenAlex
- W2068668897
- Cited by
- 225
- References
- 3
- FWCI
- 4.43
- Type
- journal article
- Language
- en
- Open access
- closed
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