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Zhao L, Li Y, Pei D, Huang Q, Zhang H, Yang Z, Li F, Shi T. Glycopolymers/PEI complexes as serum-tolerant vectors for enhanced gene delivery to hepatocytes. Carbohydr Polym 2018; 205:167-175. [PMID: 30446092 DOI: 10.1016/j.carbpol.2018.10.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 10/12/2018] [Accepted: 10/12/2018] [Indexed: 10/28/2022]
Abstract
Serum stability is a crucial factor for ideal polymeric gene vectors. In this work, a series of serum-tolerant and low-toxicity glycopolymers/poly(ethyleneimine) (PEI) complexes were designed for gene delivery. Atomic transfer radical polymerization (ATRP) was used to synthesize the comb-shaped random copolymers dextran-g-poly(2-dimethylaminoethyl methacrylate-co-2-lactobionamidoethyl methacrylate) (DDrL). Then DDrLs/PEI were investigated for their use as plasmid DNA (pDNA) vectors, which can completely condense the pDNA into nanoparticles. The DDrLs/PEI/pDNA complexes in serum-containing media showed better stability than PEI/pDNA complexes. in vitro gene transfection studies showed that DDrLs/PEI exhibited a remarkable transfection efficiency enhancement in the presence of serum compared to that in serum-free conditions. Moreover, the transfection level of DDrLs/PEI were two orders of magnitude higher than that of PEI alone in the presence of 30% serum. DDrLs/PEI complexes with galactose enhanced pDNA delivery to hepatocytes, with higher protein expression in ASGPr-presenting HepG2 than in HeLa cells, which lack the receptor. All of the DDrLs/PEI/pDNA complexes had lower cytotoxicity than PEI/pDNA.
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Affiliation(s)
- Liman Zhao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, PR China
| | - Yanchun Li
- Department of Pediatric Respiratory Medicine, First Hospital of Jilin University, Jilin Province 130021, PR China
| | - Danfeng Pei
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong Province 266101, PR China
| | - Qingrong Huang
- Department of Food Science, Rutgers, The State University of New Jersey, 65 Dudley Rd, New Brunswick, NJ 08901, USA
| | - Hongwei Zhang
- Department of Food Science, Rutgers, The State University of New Jersey, 65 Dudley Rd, New Brunswick, NJ 08901, USA
| | - Zechuan Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
| | - Fan Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
| | - Tongfei Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, PR China.
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Enhanced water-solubility and antibacterial activity of novel chitosan derivatives modified with quaternary phosphonium salt. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 61:79-84. [DOI: 10.1016/j.msec.2015.12.024] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/01/2015] [Accepted: 12/10/2015] [Indexed: 11/18/2022]
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Zhang W, Pan S, Wen Y, Luo X, Zhang X. Synthesis of poly(ethylene glycol)-g-chitosan-g-poly(ethylene imine) co-polymer and in vitro study of its suitability as a gene-delivery vector. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2010; 21:741-58. [PMID: 20482982 DOI: 10.1163/156856209x437941] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
There are two main hindrances for the application of chitosan (CS) as a gene-delivery vector: poor water solubility and low transfection efficiency. To address these problems, we modified chitosan with poly(ethylene glycol) (PEG) and poly(ethylene imine) (PEI). As previously described, PEG was grafted onto CS by a reaction between the activated PEG and CS amine. This increased the solubility of CS in neutral or basic solution. Then, monomers of PEI (i.e., aziridine) were polymerized on the CS chain of the PEG(40k)-CS(50k) co-polymer obtained in the previous step. The resulting PEG-CS-PEI (PCP) co-polymer was characterized by (1)H-NMR, (13)C-NMR and gel-permeation chromatography (GPC). It was found in the preliminary experiments that, amongst the series of PEG-CS-PEI co-polymers with various PEI molecular weights, PEG(40k)-CS(50k)-PEI(20k) was the most efficient one; therefore, it was chosen for the study. The PCP co-polymer showed lower cytotoxicity compared to PEI (25k) by MTT assay. Particle size and zeta potential of PCP/DNA complexes were measured by dynamic light scattering (DLS) and were shown to be predominantly affected by N/P ratios. PCP/DNA complexes at N/P ratio 20 were observed under a transmission electron microscope (TEM) as spherical particles with a mean diameter of about 50 nm. Plasmid DNA could be efficiently protected by PCP co-polymer from DNase I. The in vitro gene-transfection efficiency of PCP/pEGFP was higher than that of PEI(25k)/pEGFP and was markedly facilitated by serum.
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Affiliation(s)
- Wei Zhang
- The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, P. R. China
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