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Sadeqi Nezhad M. Poly (beta-amino ester) as an in vivo nanocarrier for therapeutic nucleic acids. Biotechnol Bioeng 2023; 120:95-113. [PMID: 36266918 DOI: 10.1002/bit.28269] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/12/2022] [Accepted: 10/19/2022] [Indexed: 11/11/2022]
Abstract
Therapeutic nucleic acids are an emerging class of therapy for treating various diseases through immunomodulation, protein replacement, gene editing, and genetic engineering. However, they need a vector to effectively and safely reach the target cells. Most gene and cell therapies rely on ex vivo gene delivery, which is laborious, time-consuming, and costly; therefore, devising a systematic vector for effective and safe in vivo delivery of therapeutic nucleic acids is required to target the cells of interest in an efficient manner. Synthetic nanoparticle vector poly beta amino ester (PBAE), a class of degradable polymer, is a promising candidate for in vivo gene delivery. PBAE is considered the most potent in vivo vector due to its excellent transfection performance and biodegradability. PBAE nanoparticles showed tunable charge density, diverse structural characteristics, excellent encapsulation capacity, high stability, stimuli-responsive release, site-specific delivery, potent binding to nucleic acids, flexible binding ability to various conjugates, and effective endosomal escape. These unique properties of PBAE are an essential contribution to in vivo gene delivery. The current review discusses each of the components used for PBAE synthesis and the impact of various environmental and physicochemical factors of the body on PBAE nanocarrier.
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Affiliation(s)
- Muhammad Sadeqi Nezhad
- Clinical and Translational Science Institute, Translational Biomedical Science Department, University of Rochester Medical Center, Rochester, New York, USA.,Wilmot Cancer Institute, University of Rochester Medical Center, Rochester, New York, USA.,Department of Immunology, University of Rochester Medical Center, Rochester, New York, USA
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2
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Arsenie LV, Hausig F, Kellner C, Brendel JC, Lacroix-Desmazes P, Ladmiral V, Catrouillet S. Stimuli-Responsive Thiomorpholine Oxide-Derived Polymers with Tailored Hydrophilicity and Hemocompatible Properties. Molecules 2022; 27:molecules27134233. [PMID: 35807477 PMCID: PMC9268026 DOI: 10.3390/molecules27134233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 12/10/2022] Open
Abstract
Thermo-responsive hydrophilic polymers, including those showing tuneable lower critical solution temperature (LCST), represent a continuous subject of exploration for a variety of applications, but particularly in nanomedicine. Since biological pH changes can inform the organism about the presence of disequilibrium or diseases, the development of dual LCST/pH-responsive hydrophilic polymers with biological potential is an attractive subject in polymer science. Here, we present a novel polymer featuring LCST/pH double responsiveness. The monomer ethylthiomorpholine oxide methacrylate (THOXMA) can be polymerised via the RAFT process to obtain well-defined polymers. Copolymers with hydroxyethyl methacrylate (HEMA) were prepared, which allowed the tuning of the LCST behaviour of the polymers. Both, the LCST behaviour and pH responsiveness of hydrophilic PTHOXMA were tested by following the evolution of particle size by dynamic light scattering (DLS). In weak and strong alkaline conditions, cloud points ranged between 40–60 °C, while in acidic medium no LCST was found due to the protonation of the amine of the THOX moieties. Additional cytotoxicity assays confirmed a high biocompatibility of PTHOXMA and haemolysis and aggregation assays proved that the thiomorpholine oxide-derived polymers did not cause aggregation or lysis of red blood cells. These preliminary results bode well for the use of PTHOXMA as smart material in biological applications.
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Affiliation(s)
| | - Franziska Hausig
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, 07743 Jena, Germany; (F.H.); (C.K.); (J.C.B.)
| | - Carolin Kellner
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, 07743 Jena, Germany; (F.H.); (C.K.); (J.C.B.)
| | - Johannes C. Brendel
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, 07743 Jena, Germany; (F.H.); (C.K.); (J.C.B.)
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | | | - Vincent Ladmiral
- ICGM, University of Montpellier, CNRS, ENSCM, Montpellier, France; (L.V.A.); (P.L.-D.)
- Correspondence: (V.L.); (S.C.)
| | - Sylvain Catrouillet
- ICGM, University of Montpellier, CNRS, ENSCM, Montpellier, France; (L.V.A.); (P.L.-D.)
- Correspondence: (V.L.); (S.C.)
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3
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Kim J, Kim JY, Kim H, Kim E, Park S, Ryu KH, Lee EG. Increasing Transfection Efficiency of Lipoplexes by Modulating Complexation Solution for Transient Gene Expression. Int J Mol Sci 2021; 22:ijms222212344. [PMID: 34830226 PMCID: PMC8619889 DOI: 10.3390/ijms222212344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/10/2021] [Accepted: 11/12/2021] [Indexed: 12/16/2022] Open
Abstract
Transient gene expression is a suitable tool for the production of biopharmaceutical candidates in the early stage of development and provides a simple and rapid alternative to the generation of stable cell line. In this study, an efficient transient gene expression methodology using DC-Chol/DOPE cationic liposomes and pDNA in Chinese hamster ovary suspension cells was established through screening of diverse lipoplex formation conditions. We modulated properties of both the liposome formation and pDNA solution, together called complexation solutions. Protein expression and cellular cytotoxicity were evaluated following transfection over the cell cultivation period to select the optimal complexation solution. Changes in hydrodynamic size, polydispersity index, and ζ potential of the liposomes and lipoplexes were analyzed depending on the various pH ranges of the complexation solutions using dynamic light scattering. The transfer of lipoplexes to the cytosol and their conformation were traced using fluorescence analysis until the early period of transfection. As a result, up to 1785 mg/L and 191 mg/L of human Fc protein and immunoglobulin G (bevacizumab), respectively, were successfully produced using acidic liposome formation and alkaline pDNA solutions. We expect that this lipoplex formation in acidic and alkaline complexation solutions could be an effective methodology for a promising gene delivery strategy.
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Affiliation(s)
- Jaemun Kim
- Department of Bioprocess Engineering, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea; (J.K.); (J.Y.K.)
- Bioprocess Engineering Center, KRIBB, 30 Yeongudanji-ro Ochang-eup, Cheongwon-gu, Cheongju-si 28116, Korea; (H.K.); (E.K.); (S.P.); (K.-H.R.)
| | - Ji Yul Kim
- Department of Bioprocess Engineering, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea; (J.K.); (J.Y.K.)
- Bioprocess Engineering Center, KRIBB, 30 Yeongudanji-ro Ochang-eup, Cheongwon-gu, Cheongju-si 28116, Korea; (H.K.); (E.K.); (S.P.); (K.-H.R.)
| | - Hyeonkyeong Kim
- Bioprocess Engineering Center, KRIBB, 30 Yeongudanji-ro Ochang-eup, Cheongwon-gu, Cheongju-si 28116, Korea; (H.K.); (E.K.); (S.P.); (K.-H.R.)
| | - Eunsil Kim
- Bioprocess Engineering Center, KRIBB, 30 Yeongudanji-ro Ochang-eup, Cheongwon-gu, Cheongju-si 28116, Korea; (H.K.); (E.K.); (S.P.); (K.-H.R.)
| | - Soonyong Park
- Bioprocess Engineering Center, KRIBB, 30 Yeongudanji-ro Ochang-eup, Cheongwon-gu, Cheongju-si 28116, Korea; (H.K.); (E.K.); (S.P.); (K.-H.R.)
| | - Kyoung-Hwa Ryu
- Bioprocess Engineering Center, KRIBB, 30 Yeongudanji-ro Ochang-eup, Cheongwon-gu, Cheongju-si 28116, Korea; (H.K.); (E.K.); (S.P.); (K.-H.R.)
| | - Eun Gyo Lee
- Department of Bioprocess Engineering, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea; (J.K.); (J.Y.K.)
- Bioprocess Engineering Center, KRIBB, 30 Yeongudanji-ro Ochang-eup, Cheongwon-gu, Cheongju-si 28116, Korea; (H.K.); (E.K.); (S.P.); (K.-H.R.)
- Correspondence: ; Tel.: +82-43-240-6633
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Kumar R, Santa Chalarca CF, Bockman MR, Bruggen CV, Grimme CJ, Dalal RJ, Hanson MG, Hexum JK, Reineke TM. Polymeric Delivery of Therapeutic Nucleic Acids. Chem Rev 2021; 121:11527-11652. [PMID: 33939409 DOI: 10.1021/acs.chemrev.0c00997] [Citation(s) in RCA: 128] [Impact Index Per Article: 42.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The advent of genome editing has transformed the therapeutic landscape for several debilitating diseases, and the clinical outlook for gene therapeutics has never been more promising. The therapeutic potential of nucleic acids has been limited by a reliance on engineered viral vectors for delivery. Chemically defined polymers can remediate technological, regulatory, and clinical challenges associated with viral modes of gene delivery. Because of their scalability, versatility, and exquisite tunability, polymers are ideal biomaterial platforms for delivering nucleic acid payloads efficiently while minimizing immune response and cellular toxicity. While polymeric gene delivery has progressed significantly in the past four decades, clinical translation of polymeric vehicles faces several formidable challenges. The aim of our Account is to illustrate diverse concepts in designing polymeric vectors towards meeting therapeutic goals of in vivo and ex vivo gene therapy. Here, we highlight several classes of polymers employed in gene delivery and summarize the recent work on understanding the contributions of chemical and architectural design parameters. We touch upon characterization methods used to visualize and understand events transpiring at the interfaces between polymer, nucleic acids, and the physiological environment. We conclude that interdisciplinary approaches and methodologies motivated by fundamental questions are key to designing high-performing polymeric vehicles for gene therapy.
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Affiliation(s)
- Ramya Kumar
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | | | - Matthew R Bockman
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Craig Van Bruggen
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Christian J Grimme
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Rishad J Dalal
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Mckenna G Hanson
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Joseph K Hexum
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Theresa M Reineke
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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5
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Abd Elhameed HAH, Ungor D, Igaz N, Gopisetty MK, Kiricsi M, Csapó E, Gyurcsik B. High Molecular Weight Poly(ethylenimine)-Based Water-Soluble Lipopolymer for Transfection of Cancer Cells. Macromol Biosci 2020; 20:e2000040. [PMID: 32449312 DOI: 10.1002/mabi.202000040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/15/2020] [Accepted: 04/25/2020] [Indexed: 12/19/2022]
Abstract
Over the past decade, search for novel materials for nucleic acid delivery has prompted a special interest in polymeric nanoparticles (NPs). In this study, the biological applicability of a water-soluble cationic lipopolymer (WSLP) obtained by the modification of high molecular weight branched poly(ethylenimine) (PEI) with cholesteryl chloroformate is characterized and assessed for better cellular membrane permeability. To test the delivery efficiency of the produced lipopolymer, plasmid DNA (pDNA) encoding the enhanced green fluorescent protein and WSLP are mixed at different charge ratios. WSLP and WSLP/pDNA complexes are characterized by dynamic and static light scattering, particle charge detection, scanning electron microscopy, and transmission electron microscopy. The pDNA loading of WSLP is also verified by agarose gel electrophoresis. Cytotoxicity of PEI, WSLP, and of WSLP/pDNA is evaluated on human A549 and HeLa cells. A remarkable dependence of the toxicity on the dose, cholesterylation, and charge ratio is detected. Transfection is monitored by flow cytometry and by fluorescence microscopy. Importantly, cholesterylation decreases the toxicity of the polymer, while promoting high transfection efficiency in both cell lines. This work indicates a possible optimization mode of the high molecular weight PEI-based WSLP rendering it a promising candidate for gene delivery.
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Affiliation(s)
| | - Ditta Ungor
- Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, Szeged, H-6720, Hungary
| | - Nóra Igaz
- Department of Biochemistry and Molecular Biology Doctoral School of Biology, University of Szeged, Közép fasor 52, Szeged, H-6726, Hungary
| | - Mohana Krishna Gopisetty
- Department of Biochemistry and Molecular Biology Doctoral School of Biology, University of Szeged, Közép fasor 52, Szeged, H-6726, Hungary
| | - Mónika Kiricsi
- Department of Biochemistry and Molecular Biology Doctoral School of Biology, University of Szeged, Közép fasor 52, Szeged, H-6726, Hungary
| | - Edit Csapó
- Interdisciplinary Excellence Centre, Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, Szeged, H-6720, Hungary.,Faculty of Medicine, MTA-SZTE Biomimetic Systems Research Group, Department of Medical Chemistry, University of Szeged, Dóm tér 8, Szeged, H-6720, Hungary
| | - Béla Gyurcsik
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged, H-6720, Hungary
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6
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Ryu K, Park J, Kim TI. Effect of pH-Responsive Charge-Conversional Polymer Coating to Cationic Reduced Graphene Oxide Nanostructures for Tumor Microenvironment-Targeted Drug Delivery Systems. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1289. [PMID: 31505845 PMCID: PMC6781034 DOI: 10.3390/nano9091289] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/05/2019] [Accepted: 09/06/2019] [Indexed: 01/02/2023]
Abstract
Tumor tissue represents a slightly acidic pH condition compared to normal tissue due to the accumulation of lactic acids via anaerobic metabolism. In this work, pH-responsive charge-conversional polymer (poly(ethylene imine)-poly(l-lysine)-poly(l-glutamic acid), PKE polymer) was employed for endowing charge-conversional property and serum stability to poly(ethylene imine) conjugated reduced graphene oxide-based drug delivery system (PEI-rGO). Zeta-potential value of PEI-rGO coated with PK5E7 polymer (PK5E7(PEI-rGO)) was -10.9 mV at pH 7.4 and converted to 29.2 mV at pH 6.0, showing pH-responsive charge-conversional property. Sharp-edged plate morphology of PEI-rGO was transformed to spherical nanostructures with vague edges by PK5E7 coating. Size of PK5E7(PEI-rGO) was found to be smaller than that of PEI-rGO in the serum condition, showing its increased serum stability. Loaded doxorubicin (DOX) in PK5E7(PEI-rGO) could be released rapidly in lysosomal condition (pH 5.0, 5 mM glutathione). Furthermore, DOX-loaded PK5E7(PEI-rGO) showed enhanced anticancer activity in HeLa and A549 cells in the tumor microenvironment-mimicking condition (pH 6.0, serum), which would be mediated by non-specific cellular interaction with decorated serum proteins. These results indicate that the pH-responsive charge-conversional PKE polymer coating strategy of cationic rGO nanostructures possesses a potential for acidic tumor microenvironment-targeted drug delivery systems.
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Affiliation(s)
- Kitae Ryu
- Department of Biosystems & Biomaterials Science and Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Jaehong Park
- Department of Biosystems & Biomaterials Science and Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea
| | - Tae-Il Kim
- Department of Biosystems & Biomaterials Science and Engineering, College of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
- Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Korea.
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7
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Lee GJ, Kim TI. Fluorination effect to intermediate molecular weight polyethylenimine for gene delivery systems. J Biomed Mater Res A 2019; 107:2468-2478. [PMID: 31276293 DOI: 10.1002/jbm.a.36753] [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] [Received: 03/12/2019] [Revised: 05/07/2019] [Accepted: 07/01/2019] [Indexed: 01/02/2023]
Abstract
Fluorinated intermediate molecular weight polyethylenimine (FP2ks) with various fluorination degrees was synthesized by conjugation with heptafluorobutyric anhydride and the fluorination effect for gene delivery systems was examined. FP2ks could condense pDNA, forming compact, positively charged, and nano-sized spherical particles. It was thought that their decreased electrostatic interaction with pDNA would be compensated by hydrophobic interaction. The cytotoxicity of FP2ks was increased with the increase of fluorination degree, probably due to the cellular membrane disruption via hydrophobic interaction with FP2ks. The transfection efficiency of highly fluorinated FP2ks was not severely affected in serum condition, assuming their good serum-compatibility. Discrepancy between their higher cellular uptake efficiency and lower transfection efficiency than PEI25k was thought to arise from the formation of compact polyplexes followed by the decreased dissociation of pDNA. It was also suggested that multiple energy-dependent cellular uptake mechanisms and endosome buffering would mediate the transfection of FP2ks.
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Affiliation(s)
- Gyeong Jin Lee
- Department of Biosystems & Biomaterials Science and Engineering, College of Agriculture and Life Sciences, Seoul National University, Gwanak-gu, Seoul, Republic of Korea
| | - Tae-Il Kim
- Department of Biosystems & Biomaterials Science and Engineering, College of Agriculture and Life Sciences, Seoul National University, Gwanak-gu, Seoul, Republic of Korea.,Research Institute of Agriculture and Life Sciences, Seoul National University, Gwanak-gu, Seoul, Republic of Korea
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Ryu K, Lee MK, Park J, Kim TI. pH-Responsive Charge-Conversional Poly(ethylene imine)–Poly(l-lysine)–Poly(l-glutamic acid) with Self-Assembly and Endosome Buffering Ability for Gene Delivery Systems. ACS APPLIED BIO MATERIALS 2018; 1:1496-1504. [DOI: 10.1021/acsabm.8b00428] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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9
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Bechekh K, Ghaouar N. Rheoviscosimetric Study of PEG35000 and PEG6000 at pH 7 and pH 9: Conformational Transitions and Unperturbed Dimensions. POLYMER SCIENCE SERIES A 2018. [DOI: 10.1134/s0965545x18050036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Zhu D, Yan H, Zhou Z, Tang J, Liu X, Hartmann R, Parak WJ, Feliu N, Shen Y. Detailed investigation on how the protein corona modulates the physicochemical properties and gene delivery of polyethylenimine (PEI) polyplexes. Biomater Sci 2018; 6:1800-1817. [DOI: 10.1039/c8bm00128f] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Given the various cationic polymers developed as non-viral gene delivery vectors, polyethylenimine (PEI) has been/is frequently used in in vitro transfection.
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Affiliation(s)
- Dingcheng Zhu
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
- Fachbereich Physik
| | - Huijie Yan
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
- Fachbereich Physik
| | - Zhuxian Zhou
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | - Jianbin Tang
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | - Xiangrui Liu
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | | | - Wolfgang J. Parak
- Fachbereich Physik
- Philipps Universität Marburg
- Germany
- Fachbereich Physik und Chemie and CHyN
- Universität Hamburg
| | - Neus Feliu
- Fachbereich Physik
- Philipps Universität Marburg
- Germany
- Fachbereich Physik und Chemie and CHyN
- Universität Hamburg
| | - Youqing Shen
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
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11
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Chang PKC, Prestidge CA, Bremmell KE. Interfacial analysis of siRNA complexes with poly-ethylenimine (PEI) or PAMAM dendrimers in gene delivery. Colloids Surf B Biointerfaces 2017; 158:370-378. [PMID: 28719858 DOI: 10.1016/j.colsurfb.2017.07.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 06/29/2017] [Accepted: 07/01/2017] [Indexed: 12/29/2022]
Abstract
Solution and interfacial analysis has been employed to gain insight into the complexation of siRNA using either G4 PAMAM dendrimers or 25kDa branched poly-ethylenimine (bPEI). The size, charge and shape/structure of the complexing agents were probed using atomic force microscopy (AFM), circular dichroism spectrometry (CD), dynamic light scattering (DLS), and gel electrophoresis (GE). The binding capability of these cationic polymers to the siRNA molecule, subsequently controls the surface/adsorption behaviour of the complexes to a negatively charged surface. G4 PAMAM dendrimers bind to the major groove of the siRNA structure, while bPEI binds to both major and minor groove. PAMAM-siRNA complexes form a thin uniform surface film with adsorption of monomeric particles, whilst bPEI-siRNA complexes adsorb as particles in random orientations at low bPEI concentration and form network structures across the surface at high charge ratio. This is due to their ability to bind to both regions within siRNA. This new understanding of the interfacial behaviour of siRNA complexes correlates with observations of cellular transfection and can be used in the design of optimal transfection agents.
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Affiliation(s)
- Patrick K C Chang
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, 5000, Australia
| | - Clive A Prestidge
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, 5000, Australia
| | - Kristen E Bremmell
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, 5000, Australia.
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12
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Optimization of Polyplex Formation between DNA Oligonucleotide and Poly(ʟ-Lysine): Experimental Study and Modeling Approach. Int J Mol Sci 2017. [PMID: 28629130 PMCID: PMC5486112 DOI: 10.3390/ijms18061291] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The polyplexes formed by nucleic acids and polycations have received a great attention owing to their potential application in gene therapy. In our study, we report experimental results and modeling outcomes regarding the optimization of polyplex formation between the double-stranded DNA (dsDNA) and poly(l-Lysine) (PLL). The quantification of the binding efficiency during polyplex formation was performed by processing of the images captured from the gel electrophoresis assays. The design of experiments (DoE) and response surface methodology (RSM) were employed to investigate the coupling effect of key factors (pH and N/P ratio) affecting the binding efficiency. According to the experimental observations and response surface analysis, the N/P ratio showed a major influence on binding efficiency compared to pH. Model-based optimization calculations along with the experimental confirmation runs unveiled the maximal binding efficiency (99.4%) achieved at pH 5.4 and N/P ratio 125. To support the experimental data and reveal insights of molecular mechanism responsible for the polyplex formation between dsDNA and PLL, molecular dynamics simulations were performed at pH 5.4 and 7.4.
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13
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Sessions JW, Hanks BW, Lindstrom DL, Hope S, Jensen BD. Transient Low-Temperature Effects on Propidium Iodide Uptake in Lance Array Nanoinjected HeLa Cells. J Nanotechnol Eng Med 2016. [DOI: 10.1115/1.4033323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Understanding environmental factors relative to transfection protocols is key for improving genetic engineering outcomes. In the following work, the effects of temperature on a nonviral transfection procedure previously described as lance array nanoinjection are examined in context of molecular delivery of propidium iodide (PI), a cell membrane impermeable nucleic acid dye, to HeLa 229 cells. For treatment samples, variables include varying the temperature of the injection solution (3C and 23C) and the magnitude of the pulsed voltage used during lance insertion into the cells (+5 V and +7 V). Results indicate that PI is delivered at levels significantly higher for samples injected at 3C as opposed to 23C at four different postinjection intervals (t = 0, 3, 6, 9 mins; p-value ≤ 0.005), reaching a maximum value of 8.3 times the positive control for 3 C/7 V pulsed samples. Suggested in this work is that between 3 and 6 mins postinjection, a large number of induced pores from the injection event close. While residual levels of PI still continue to enter the treatment samples after 6 mins, it occurs at decreased levels, suggesting from a physiological perspective that many lance array nanoinjection (LAN) induced pores have closed, some are still present.
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Affiliation(s)
- John W. Sessions
- Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602 e-mail:
| | - Brad W. Hanks
- Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602 e-mail:
| | - Dallin L. Lindstrom
- Department of Exercise Science, Brigham Young University, Provo, UT 84602 e-mail:
| | - Sandra Hope
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT 84602 e-mail:
| | - Brian D. Jensen
- Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602 e-mail:
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14
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Moon SY, Choi YS, Cho JK, Yu M, Lee E, Huh KM, Lee DH, Kim JH, Kang HC. Intracellular thiol-responsive nanosized drug carriers self-assembled by poly(ethylene glycol)-b-poly(ε-caprolactone)-b-poly(ethylene glycol) having multiple bioreducible disulfide linkages in hydrophobic blocks. RSC Adv 2016. [DOI: 10.1039/c5ra25319e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Intracellular thiol can trigger effective drug release from polymeric nanoparticles having multiple disulfide linkages in the hydrophobic domain.
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Affiliation(s)
- Seung Yeon Moon
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences
- College of Pharmacy
- The Catholic University of Korea
- Bucheon-si
- Republic of Korea
| | - Yeon Su Choi
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences
- College of Pharmacy
- The Catholic University of Korea
- Bucheon-si
- Republic of Korea
| | - Jung-Kyo Cho
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences
- College of Pharmacy
- The Catholic University of Korea
- Bucheon-si
- Republic of Korea
| | - Minjong Yu
- Graduate School of Analytical Science and Technology
- Chungnam National University
- Daejeon 34134
- Republic of Korea
| | - Eunji Lee
- Graduate School of Analytical Science and Technology
- Chungnam National University
- Daejeon 34134
- Republic of Korea
| | - Kang Moo Huh
- Department of Polymer Science and Engineering
- Chungnam National University
- Daejeon 34134
- Republic of Korea
| | - Don Haeng Lee
- Division of Gastroenterology and Hepatology
- Department of Internal Medicine
- Inha University Hospital
- Incheon 22332
- Republic of Korea
| | - Jong-Ho Kim
- Department of Pharmaceutical Sciences
- Kyung Hee University
- Seoul 02447
- Republic of Korea
| | - Han Chang Kang
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences
- College of Pharmacy
- The Catholic University of Korea
- Bucheon-si
- Republic of Korea
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15
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Agirre M, Zarate J, Ojeda E, Puras G, Rojas LA, Alemany R, Pedraz JL. Delivery of an adenovirus vector plasmid by ultrapure oligochitosan based polyplexes. Int J Pharm 2014; 479:312-9. [PMID: 25550211 DOI: 10.1016/j.ijpharm.2014.12.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/23/2014] [Accepted: 12/26/2014] [Indexed: 12/11/2022]
Abstract
Ultrapure oligochitosans have been recently reported as efficient non-viral vectors for the delivery of pCMS-EGFP plasmid (5.5kbp) to the cornea and retina. However, the delivery of oncolytic adenoviral plasmids (40kbp) represents a unique challenge. In this work, we elaborated self assembled O15 and O25 UOC/pAdTLRGD polyplexes, and we studied the influence of the N/P ratio, the pH of the transfection medium and the salt concentration on the particle size and zeta potential by an orthogonal experimental design. All polyplexes showed a particle size lower than 200nm and a positive zeta potential. These parameters were influenced by the N/P ratio, salt concentration, and pH of the transfection medium. The selected polyplexes were able to bind, release, and protect the plasmid from DNase degradation. Transfection experiments in HEK293 and A549 cell lines demonstrated that UOC/pAdTLRGD polyplexes were able to deliver the plasmid and transfect both cell lines. These results suggest that O15 and O25 UOC based polyplexes are suitable for future in vivo applications.
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Affiliation(s)
- Mireia Agirre
- NanoBioCel Group, University of the Basque Country, Vitoria-Gasteiz, Spain; Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Jon Zarate
- NanoBioCel Group, University of the Basque Country, Vitoria-Gasteiz, Spain; Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Edilberto Ojeda
- NanoBioCel Group, University of the Basque Country, Vitoria-Gasteiz, Spain; Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Gustavo Puras
- NanoBioCel Group, University of the Basque Country, Vitoria-Gasteiz, Spain; Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Luis A Rojas
- Traslational Research Laboratory, IDIBELL-Institut Catalá d'Oncologia, L'Hospitalet de LLobregat, Barcelona, Spain
| | - Ramón Alemany
- Traslational Research Laboratory, IDIBELL-Institut Catalá d'Oncologia, L'Hospitalet de LLobregat, Barcelona, Spain
| | - José L Pedraz
- NanoBioCel Group, University of the Basque Country, Vitoria-Gasteiz, Spain; Networking Research Center of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain.
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16
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Agirre M, Zarate J, Puras G, Ojeda E, Pedraz JL. Improving transfection efficiency of ultrapure oligochitosan/DNA polyplexes by medium acidification. Drug Deliv 2014; 22:100-10. [PMID: 24471693 DOI: 10.3109/10717544.2013.871373] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
CONTEXT Ultrapure oligochitosans (UOCs) have recently been reported as efficient nonviral vectors for corneal and retinal gene delivery. However, the influence of some physicochemical factors on the transfection efficiency, such as the pH, remains unclear. Deeper in vitro research of these factors could provide valuable information for future clinical applications. OBJECTIVE The aim of this study is to determine the influence of the pH decrease on the transfection efficiency of UOC/pDNA polyplexes in HEK293 and ARPE19 cells. MATERIALS AND METHODS We elaborated self-assembled UOC/pCMS-EGFP polyplexes. The influence of the most important factors on the particle size and the zeta potential was studied by an orthogonal experimental design. We evaluated, in vitro, the cellular uptake and the transfection efficiency by flow cytometry, and the cytotoxicity of the vectors by CCK-8 assay. RESULTS AND DISCUSSION The pH of the medium strongly influences the physicochemical properties of the polyplexes, and by its modulation we are able to control their superficial charge. A significant increase on the cellular uptake and transfection efficiency of UOCs was obtained when the pH was acidified. Neither of our UOC/pCMS-EGFP polyplexes caused cytotoxicity; however, cells treated with Lipofectamine 2000™ showed decreased cell viability. CONCLUSION This kind of UOC vectors could be useful to transfect cells that are in an acidic environment, such as tumor cells. However, additional in vivo studies may be required in order to obtain an effective and safe medicine for nonviral gene therapy purpose.
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Affiliation(s)
- Mireia Agirre
- NanoBioCel Group, University of the Basque Country , Vitoria-Gasteiz , Spain and
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17
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Iwai R, Haruki R, Nemoto Y, Nakayama Y. Enhanced Transfection Efficiency of Poly(N,N-dimethylaminoethyl methacrylate)-Based Deposition Transfection by Combination with Tris(hydroxymethyl)aminomethane. Bioconjug Chem 2013; 24:159-66. [DOI: 10.1021/bc300317e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ryosuke Iwai
- Division of Medical Engineering
and Materials, National Cerebral and Cardiovascular Center Research Institute, Japan
| | - Ryota Haruki
- Division of Medical Engineering
and Materials, National Cerebral and Cardiovascular Center Research Institute, Japan
| | - Yasushi Nemoto
- Division of Medical Engineering
and Materials, National Cerebral and Cardiovascular Center Research Institute, Japan
- Development Department, Chemical
Products Division, Bridgestone Co., Japan
| | - Yasuhide Nakayama
- Division of Medical Engineering
and Materials, National Cerebral and Cardiovascular Center Research Institute, Japan
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18
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Hwang HS, Kang HC, Bae YH. Bioreducible polymers as a determining factor for polyplex decomplexation rate and transfection. Biomacromolecules 2013; 14:548-56. [PMID: 23259985 DOI: 10.1021/bm301794d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Polyplex formation (complexation) and gene release from the polyplexes (decomplexation) are major events in polymeric gene delivery; however, the effect of the decomplexation rate on transfection has been rarely investigated. This study employed mixed polymers of poly((L)-lysine) (PLL: MW ~7.4 kDa) and reducible PLL (RPLL) (MW ~6.7 kDa) to design decomplexation rate-controllable PLL(100-x)RPLL(x)/pDNA complexes (PRL(x) polyplexes). The transfection efficiency of a model gene (luciferase) in MCF7 and HEK293 cell lines increased with increasing x (RPLL content) in the PRL(x) polyplexes until peaking at x = 2.5 and 10, respectively, after which point transfection efficiency declined rapidly. In MCF7 cells, PRL(2.5) polyplex produced 3 or 223 times higher gene expression than PLL or RPLL polyplexes, respectively. Similarly, the transfection efficiency of PRL(10) polyplex-transfected HEK293 cells was 3.8 or 67 times higher than that of PLL or RPLL polyplexes, respectively. The transfection results were not apparently related to the particle size, surface charge, complexation/compactness, cellular uptake, or cytotoxicity of the tested polyplexes. However, the decomplexation rate varied by RPLL content in the polyplexes, which in turn influenced the gene transfection. The nuclear localization of pDNA delivered by PRL(x) polyplexes showed a similar trend to their transfection efficiencies. This study suggests that an optimum decomplexation rate may result in high nuclear localization of pDNA and transfection. Understanding in decomplexation and intracellular localization of pDNA may help develop more effective polyplexes.
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Affiliation(s)
- Hee Sook Hwang
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, 421 Wakara Way, Salt Lake City, UT 84108, United States
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19
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Kang HC, Huh KM, Bae YH. Polymeric nucleic acid carriers: current issues and novel design approaches. J Control Release 2012; 164:256-64. [PMID: 22771981 DOI: 10.1016/j.jconrel.2012.06.036] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 06/25/2012] [Accepted: 06/27/2012] [Indexed: 11/26/2022]
Abstract
To deliver nucleic acids including plasmid DNA (pDNA) and short interfering RNA (siRNA), polymeric gene carriers equipped with various functionalities have been extensively investigated. The functionalities of these polymeric vectors have been designed to overcome various extracellular and intracellular hurdles that nucleic acids and their carriers encounter during their journey from injection site to intracellular target site. This review briefly introduces known extracellular and intracellular issues of nucleic acid delivery and their solution strategies. We examine significant yet overlooked factors affecting nucleic acid delivery (e.g., microenvironmental pH, polymer/siRNA complexation, and pharmaceutical formulation) and highlight our reported approaches to solve these problems.
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Affiliation(s)
- Han Chang Kang
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do 420-743, Republic of Korea
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