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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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Dirisala A, Uchida S, Tockary TA, Yoshinaga N, Li J, Osawa S, Gorantla L, Fukushima S, Osada K, Kataoka K. Precise tuning of disulphide crosslinking in mRNA polyplex micelles for optimising extracellular and intracellular nuclease tolerability. J Drug Target 2019; 27:670-680. [PMID: 30499743 DOI: 10.1080/1061186x.2018.1550646] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The major issues in messenger (m)RNA delivery are rapid mRNA degradation in the extracellular and intracellular spaces, which decreases the efficiency and duration for protein expression from mRNA. Stabilization of mRNA carriers using environment-responsive crosslinkings has promises to overcome these issues. Herein, we fine-tuned the structure of disulphide crosslinkings, which are selectively cleaved in the intracellular reductive environment, using the mRNA-loaded polyplex micelles (PMs) prepared from poly(ethylene glycol)-poly(L-lysine) (PEG-PLys) block copolymers, particularly by focussing on cationic charge density after the crosslinking. Primary amino groups in PLys segment were partially thiolated in two ways: One is to introduce 3-mercaptopropionyl (MP) groups via amide linkage, resulting in the decreased cationic charge density [PEG-PLys(MP)], and the other is the conversion of amino groups to 1-amidine-3-mercaptopropyl (AMP) groups with preserving cationic charge density [PEG-PLys(AMP)]. Compared to non-crosslinked and PEG-PLys(MP) PMs, PEG-PLys(AMP) PM attained tighter mRNA packaging in the PM core, thereby improving mRNA nuclease tolerability in serum and intracellular spaces, and providing enhanced protein expression in cultured cells at the optimal crosslinking density. These findings highlight the importance of cationic charge preservation in installing crosslinking moieties, providing a rationale for mRNA carrier design in the molecular level.
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Affiliation(s)
- Anjaneyulu Dirisala
- a Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion , Kawasaki , Kanagawa , Japan
| | - Satoshi Uchida
- a Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion , Kawasaki , Kanagawa , Japan.,b Department of Bioengineering , Graduate School of Engineering, The University of Tokyo , Bunkyo , Tokyo , Japan
| | - Theofilus A Tockary
- a Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion , Kawasaki , Kanagawa , Japan
| | - Naoto Yoshinaga
- b Department of Bioengineering , Graduate School of Engineering, The University of Tokyo , Bunkyo , Tokyo , Japan
| | - Junjie Li
- a Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion , Kawasaki , Kanagawa , Japan
| | - Shigehito Osawa
- a Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion , Kawasaki , Kanagawa , Japan
| | - Lahari Gorantla
- c Department of Bioengineering , College of Engineering, University of Washington , Washington , USA
| | - Shigeto Fukushima
- a Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion , Kawasaki , Kanagawa , Japan
| | - Kensuke Osada
- d National Institutes for Quantum and Radiology Science and Technology , Inage , Chiba , Japan
| | - Kazunori Kataoka
- a Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion , Kawasaki , Kanagawa , Japan.,e Policy Alternatives Research Institute, The University of Tokyo , Bunkyo , Tokyo , Japan
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Uchida S, Kataoka K. Design concepts of polyplex micelles for in vivo therapeutic delivery of plasmid DNA and messenger RNA. J Biomed Mater Res A 2019; 107:978-990. [PMID: 30665262 DOI: 10.1002/jbm.a.36614] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 11/27/2018] [Indexed: 12/20/2022]
Abstract
Nonviral delivery of plasmid (p)DNA or messenger (m)RNA is a safe and promising therapeutic option to continuously supply therapeutic proteins into diseased tissues. In most cases of in vivo pDNA and mRNA delivery, these nucleic acids are loaded into carriers based on cationic polymers and/or lipids to prevent nuclease-mediated degradation before reaching target cells. The carriers should also evade host clearance mechanisms, including uptake by scavenger cells and filtration in the spleen. Installation of ligands onto the carriers can facilitate their rapid uptake into target cells. Meanwhile, carrier toxicity should be minimized not only for preventing undesirable adverse responses in patients, but also for preserving the function of transfected cells to exert therapeutic effects. Long-term progressive improvement of platform technologies has helped overcome most of these issues, though some still remain hindering the widespread clinical application of nonviral pDNA and mRNA delivery. This review discusses design concepts of nonviral carriers for in vivo delivery and the issues to be overcome, focusing especially on our own efforts using polyplex micelles. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 978-990, 2019.
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Affiliation(s)
- Satoshi Uchida
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan.,Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion, Kawasaki, Kanagawa 210-0821, Japan
| | - Kazunori Kataoka
- Innovation Center of NanoMedicine (iCONM), Kawasaki Institute of Industrial Promotion, Kawasaki, Kanagawa 210-0821, Japan.,Policy Alternatives Research Institute, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
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Chen Q, Qi R, Chen X, Yang X, Huang X, Xiao H, Wang X, Dong W. Polymeric Nanostructure Compiled with Multifunctional Components To Exert Tumor-Targeted Delivery of Antiangiogenic Gene for Tumor Growth Suppression. ACS Appl Mater Interfaces 2016; 8:24404-24414. [PMID: 27576084 DOI: 10.1021/acsami.6b06782] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nucleic acid-based therapy has emerged as a revolutionary methodology for treatment of the diseases related to protein dysfunction; however, lack of systemically applicable synthetic delivery systems limits its current usage in local applications, particularly for DNA-based therapy with regard to the poor bioavailability in the systemic administrations. To overcome this obstacle, we compiled multiple chemistry-based strategies into the manufacture of the gene delivery formulations to pursue improved tolerability of DNA to the enzymatic degradation in the biological milieu and prolonged retention in the systemic circulation. Here, we constructed a distinctive multilayered functional architecture: plasmid DNA (pDNA) was electrostatically complexed with cationic poly(lysine) (polyplex) as the interior pDNA reservoir, which was further cross-linked by redox-responsive disulfide cross-linking to minimize the occurrence of polyplex disassembly through exchange reaction with the biological charged components. Still, the pDNA reservoir was spatially protected by a sequential thermoresponsive poly(N-isopropylacrylamide) palisade as the intermediate barrier and a biocompatible hydrophilic poly(ethylene glycol) (PEG) shell with the aim of preventing the accessibility of the biological species, particularly the nuclease degradation to the pDNA payload. Subsequent investigations validated the utilities of these strategies in accomplishing prolonged blood retention. In an attempt to apply this method for tumor therapy, ligand cyclic (Arg-Gly-Asp) peptide was attached at the distal end of PEG, validating prompted tumor-targeted delivery and gene expression of the loaded antiangiogenic gene at the targeted tumor cells and accordingly exerting antiangiogenesis of the tumors for abrogation of tumor growth. Together with its excellent safe profile, the proposed formulation suggests potential utility as a practical gene delivery system for treatment of intractable diseases.
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Affiliation(s)
- Qixian Chen
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering , Suzhou 215163, China
- Deparment of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Ruogu Qi
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, China
| | - Xiyi Chen
- School of Public Health, Dalian Medical University , No. 9 West Section Lvshun South Road, Dalian 116044, China
| | - Xi Yang
- Department of Neurosurgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai 200127, China
| | - Xing Huang
- Department of Urology, Zhongnan Hospital, Wuhan University , Wuhan 430071 China
| | - Haihua Xiao
- State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, China
| | - Xinhuan Wang
- Department of Urology, Zhongnan Hospital, Wuhan University , Wuhan 430071 China
| | - Wenfei Dong
- CAS Key Laboratory of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering , Suzhou 215163, China
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