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Ueno M, Yamauchi S, Kumekawa D, Yamasaki Y. Peptide Sequence-Dependent Gene Expression of PEGylated Peptide/DNA Complexes. Mol Pharm 2019; 16:3072-3082. [PMID: 31173498 DOI: 10.1021/acs.molpharmaceut.9b00295] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Oligolysine-based PEG-peptides with 15 or 20 amino acid residues including two cysteines were synthesized to formulate cross-linked polyplex micelles (PMs) incorporating luciferase-coding plasmid DNA (pDNA). Two cysteine residues were separately allocated at the C-terminal, center, or N-terminal of peptide moieties. Although TEM observation showed that all PEG-peptides condensed pDNA into rod-like or toroidal morphologies, the rod length distribution of PMs was affected by both the amino acid sequence and the peptide length of PEG-peptides. In comparison to the cysteine-uninstalled PEG-peptides, the cysteine-installed PEG-peptides exhibited a reductive environment-responsive pDNA release, which was observed in a gel retardation assay. From physicochemical characterizations, a relationship between the amino acid sequence and the in vitro gene expression efficacy of PMs in a cell-free protein synthesis system has been clearly demonstrated. Finally, the cell-based assay using HeLa cells has been tested, and the differences between both results of cell-free and cell-based systems are discussed.
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Affiliation(s)
- Mikiko Ueno
- Department of Materials Engineering, Graduate School of Engineering , The University of Tokyo , Hongo 7-3-1 , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Satoshi Yamauchi
- Department of Materials Engineering, Graduate School of Engineering , The University of Tokyo , Hongo 7-3-1 , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Daiki Kumekawa
- Department of Materials Engineering, Graduate School of Engineering , The University of Tokyo , Hongo 7-3-1 , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Yuichi Yamasaki
- Department of Materials Engineering, Graduate School of Engineering , The University of Tokyo , Hongo 7-3-1 , Bunkyo-ku, Tokyo 113-8656 , Japan
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Tachaboonyakiat W, Ajiro H, Akashi M. Controlled DNA interpolyelectrolyte complex formation or dissociation via stimuli-responsive poly(vinylamine- co- N-vinylisobutylamide). J Appl Polym Sci 2016. [DOI: 10.1002/app.43852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wanpen Tachaboonyakiat
- Department of Materials Science, Faculty of Science; Chulalongkorn University; Phayathai Bangkok 10330 Thailand
| | - Hiroharu Ajiro
- Institute for Research Initiatives, Division for Research Strategy; Nara Institute of Science and Technology; 8916-5 Takayama Ikoma 630-0192 Japan
- Graduate School of Materials Science, Nara Institute of Science and Technology; 8916-5 Takayama Ikoma 630-0192 Japan
- JST, PRESTO; 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Mitsuru Akashi
- Department of Frontier Biosciences, Graduate School of Frontier Biosciences; Osaka University; 1-3 Yamadaoka Suita Osaka 565-0871 Japan
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Luo K, Yin J, Song Z, Cui L, Cao B, Chen X. Biodegradable Interpolyelectrolyte Complexes Based on Methoxy Poly(ethylene glycol)-b-poly(α,l-glutamic acid) and Chitosan. Biomacromolecules 2008; 9:2653-61. [DOI: 10.1021/bm800767f] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kun Luo
- Department of polymer materials, Shanghai University, 20 Chengzhong Street, Jiading, Shanghai, China, National Tissue Engineering Center of China, Shanghai, 20 QinZhou Street, China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, China
| | - Jingbo Yin
- Department of polymer materials, Shanghai University, 20 Chengzhong Street, Jiading, Shanghai, China, National Tissue Engineering Center of China, Shanghai, 20 QinZhou Street, China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, China
| | - Zhijiang Song
- Department of polymer materials, Shanghai University, 20 Chengzhong Street, Jiading, Shanghai, China, National Tissue Engineering Center of China, Shanghai, 20 QinZhou Street, China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, China
| | - Lei Cui
- Department of polymer materials, Shanghai University, 20 Chengzhong Street, Jiading, Shanghai, China, National Tissue Engineering Center of China, Shanghai, 20 QinZhou Street, China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, China
| | - Bin Cao
- Department of polymer materials, Shanghai University, 20 Chengzhong Street, Jiading, Shanghai, China, National Tissue Engineering Center of China, Shanghai, 20 QinZhou Street, China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, China
| | - Xuesi Chen
- Department of polymer materials, Shanghai University, 20 Chengzhong Street, Jiading, Shanghai, China, National Tissue Engineering Center of China, Shanghai, 20 QinZhou Street, China, and State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, China
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Ward CM, Pechar M, Oupicky D, Ulbrich K, Seymour LW. Modification of pLL/DNA complexes with a multivalent hydrophilic polymer permits folate-mediated targeting in vitro and prolonged plasma circulation in vivo. J Gene Med 2002; 4:536-47. [PMID: 12221647 DOI: 10.1002/jgm.296] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Gene delivery vectors based on poly(L-lysine) and DNA (pLL/DNA complexes) have limited use for targeted systemic application in vivo since they bind cells and proteins non-specifically. In this study we have attempted to form folate-targeted vectors with extended systemic circulation by surface modification of pLL/DNA complexes with hydrophilic polymers. METHODS pLL/DNA complexes were stabilised by surface modification with a multivalent reactive polymer based on alternating segments of poly(ethylene glycol) and tripeptides bearing reactive ester groups. Folate moieties were incorporated into the vectors either by direct attachment of folate to the polymer or via intermediate poly(ethylene glycol) spacers of 800 and 3400 Da. RESULTS Polymer-coated complexes show similar morphology to uncoated complexes, their zeta potential is decreased towards zero, serum protein binding is inhibited and aqueous solubility is substantially increased. Intravenous (i.v.) administration to mice of coated complexes produced extended systemic circulation, with up to 2000-fold more DNA measured in the bloodstream after 30 min compared with simple pLL/DNA complexes. In further contrast to simple pLL/DNA complexes, coated complexes do not bind blood cells in vivo. Folate receptor targeting is shown to mediate targeted association with HeLa cells in vitro, leading to increased transgene expression. We demonstrate for the first time that DNA uptake via the folate receptor is dependent on pEG spacer length, with the transgene expression relatively independent of the level of internalised DNA. CONCLUSIONS We show increased systemic circulation, decreased blood cell and protein binding, and folate-targeted transgene expression using pLL/DNA complexes surface-modified with a novel multireactive hydrophilic polymer. This work provides the basis for the development of plasma-circulating targeted vectors for in vivo applications.
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Affiliation(s)
- Christopher M Ward
- Paterson Institute for Cancer Research, Christie Hospital NHS Trust, Wilmslow Road, Manchester M20 4BX, UK.
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Ward CM, Read ML, Seymour LW. Systemic circulation of poly(L-lysine)/DNA vectors is influenced by polycation molecular weight and type of DNA: differential circulation in mice and rats and the implications for human gene therapy. Blood 2001; 97:2221-9. [PMID: 11290582 DOI: 10.1182/blood.v97.8.2221] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Effective gene therapy for diseases of the circulation requires vectors capable of systemic delivery. The molecular weight of poly(L-lysine) (pLL) has a significant effect on the circulation of pLL/DNA complexes in mice, with pLL(211)/DNA complexes displaying up to 20 times greater levels in the blood after 30 minutes compared with pLL(20)/DNA. It is shown that pLL(20)/DNA complexes fix mouse complement C3 in vitro, independent of immunoglobulin binding; are less soluble in the blood in vivo; bind erythrocytes; are rapidly removed by the liver, where they associate predominantly with Kupffer cells; and result in a rapid increase in hepatic leukocytes expressing high levels of complement receptor 3 (CR3). The circulation properties of these complexes are also dependent on the type of DNA used, with circular plasmid DNA complexes exhibiting increased circulation compared with linear DNA. PLL(211)/DNA complexes bind erythrocytes and associate with Kupffer cells but, in contrast, do not fix mouse complement in vitro and are unaffected by the type of DNA used. In rats, both types of complexes produce hematuria and are rapidly removed from the circulation. Correlation of in vivo and in vitro results suggests that the solubility of complexes in physiological saline and species-matched complement fixation and erythrocyte lysis may correlate with systemic circulation. Analysis using human blood in vitro shows no hemolysis, but both types of complexes fix complement and bind IgG, suggesting that pLL/DNA complexes may be rapidly cleared from the human circulation.
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Affiliation(s)
- C M Ward
- CRC Institute for Cancer Studies, University of Birmingham, United Kingdom.
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