1
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Wang S. pH-Responsive Amphiphilic Carboxylate Polymers: Design and Potential for Endosomal Escape. Front Chem 2021; 9:645297. [PMID: 33834015 PMCID: PMC8021698 DOI: 10.3389/fchem.2021.645297] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 02/22/2021] [Indexed: 12/19/2022] Open
Abstract
The intracellular delivery of emerging biomacromolecular therapeutics, such as genes, peptides, and proteins, remains a great challenge. Unlike small hydrophobic drugs, these biotherapeutics are impermeable to the cell membrane, thus relying on the endocytic pathways for cell entry. After endocytosis, they are entrapped in the endosomes and finally degraded in lysosomes. To overcome these barriers, many carriers have been developed to facilitate the endosomal escape of these biomacromolecules. This mini-review focuses on the development of anionic pH-responsive amphiphilic carboxylate polymers for endosomal escape applications, including the design and synthesis of these polymers, the mechanistic insights of their endosomal escape capability, the challenges in the field, and future opportunities.
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Affiliation(s)
- Shiqi Wang
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
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2
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Wang M, Wu B, Tucker JD, Lu P, Lu Q. A combinatorial library of triazine-cored polymeric vectors for pDNA delivery in vitro and in vivo. J Mater Chem B 2017; 5:3907-3918. [PMID: 32264252 DOI: 10.1039/c6tb03311c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A set of triazine-cored cationic amphiphilic polymers (TAPs) composed of low molecular weight (Mw) polyethylenimine (LPEI, B) and amphiphilic Jeffamine (A) were prepared with controllable composition and molecular size, and further characterized for plasmid DNA (pDNA) delivery both in vitro and in vivo. These new polymers condensed pDNA efficiently at a polymer/pDNA weight ratio of 5 with particle sizes below 200 nm. The introduction of Jeffamine in the polymers significantly improved the cellular uptake of pDNA, but without increasing its toxicity compared with the parent LPEI. The best formulation resulted in 6- and 29-fold transfection efficiencies of PEI 25k in vitro and in vivo in mdx mice, respectively. Higher transfection efficiency was achieved with more lipophilic A1/A3-based polymers in vitro, with 1A11B3 and 1A12B3 showing the greatest delivery performance. However, the lipophilicity of the TAPs is less critical in vivo as the less lipophilic A2/A4 constructed TAPs also performed similarly well as the more lipophilic A1/A3 constructed ones. In addition, a synergistic effect of LPEI and Jeffamine via chemical conjugation for the delivery of pDNA was revealed in transfection efficiency. These results indicate that the appropriate positive surface and particle size of polymer/pDNA complex and the composition and hydrophilic-lipophilic balance (HLB) of polymers are crucial for effective delivery, although intricate matching exists between A and B in the TAP composition. Triazine-cored cationic amphiphilic polymers are safe and potentially effective carriers for gene/drug delivery.
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Affiliation(s)
- Mingxing Wang
- McColl-Lockwood Laboratory for Muscular Dystrophy Research, Cannon Research Center, Carolinas Medical Center, 1000 Blythe Blvd., Charlotte, NC 28231, USA.
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3
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Shi J, Zhang H, Chen Z, Xu L, Zhang Z. A multi-functional nanoplatform for efficacy tumor theranostic applications. Asian J Pharm Sci 2016; 12:235-249. [PMID: 32104335 PMCID: PMC7032091 DOI: 10.1016/j.ajps.2016.12.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 11/22/2016] [Accepted: 12/07/2016] [Indexed: 02/08/2023] Open
Abstract
Nanomaterials with multiple functions have become more and more popular in the domain of cancer research. MoS2 has a great potential in photothermal therapy, X-ray/CT imaging and drug delivery. In this study, a water soluble MoS2 nanosystem (MoS2-PEG) was synthesized and explored in drug delivery, photothermal therapy (PTT) and X-ray imaging. Doxorubicin (DOX) was loaded onto MoS2-PEG with a high drug loading efficiency (~69%) and obtained a multifunctional drug delivery system (MoS2-PEG/DOX). As the drug delivery, MoS2-PEG/DOX could efficiently cross the cell membranes, and escape from the endosome via NIR light irradiation, lead to more apoptosis in MCF-7 cells, and afford higher antitumor efficacy without obvious toxic effects to normal organs owing to its prolonged blood circulation and 11.6-fold higher DTX uptake of tumor than DOX. Besides, MoS2-PEG/DOX not only served as a drug delivery system, but also as a powerful PTT agent for thermal ablation of tumor and a strong X-ray contrast agent for tumor diagnosis. In the in vitro and in vivo studies, MoS2-PEG/DOX exhibited excellent tumor-targeting efficacy, outstanding synergistic anti-cancer effect of photothermal and chemotherapy and X-ray imaging property, demonstrating that MoS2-PEG/DOX had a great potential for simultaneous diagnosis and photothermal-chemotherapy in cancer treatment.
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Affiliation(s)
- Jinjin Shi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Hongling Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Zhaoyang Chen
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Lihua Xu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Zhenzhong Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
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4
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Henke H, Kryeziu K, Banfić J, Theiner S, Körner W, Brüggemann O, Berger W, Keppler BK, Heffeter P, Teasdale I. Macromolecular Pt(IV) Prodrugs from Poly(organo)phosphazenes. Macromol Biosci 2016; 16:1239-1249. [PMID: 27169668 DOI: 10.1002/mabi.201600035] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 02/25/2016] [Indexed: 11/06/2022]
Abstract
The preparation of novel macromolecular prodrugs via the conjugation of two platinum(IV) complexes to suitably functionalized poly(organo)phosphazenes is presented. The inorganic/organic polymers provide carriers with controlled dimensions due to the use of living cationic polymerization and allow the preparation of conjugates with excellent aqueous solubility but long-term hydrolytic degradability. The macromolecular Pt(IV) prodrugs are designed to undergo intracellular reduction and simultaneous release from the macromolecular carrier to present the active Pt(II) drug derivatives. In vitro investigations show a significantly enhanced intracellular uptake of Pt for the macromolecular prodrugs when compared to small molecule Pt complexes, which is also reflected in an increase in cytotoxicity. Interestingly, drug-resistant sublines also show a significantly smaller resistance against the conjugates compared to clinically established platinum drugs, indicating that an alternative uptake route of the Pt(IV) conjugates might also be able to overcome acquired resistance against Pt(II) drugs. In vivo studies of a selected conjugate show improved tumor shrinkage compared to the respective Pt(IV) complex.
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Affiliation(s)
- Helena Henke
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
| | - Kushtrim Kryeziu
- Institute of Cancer Research and Comprehensive Cancer Center, Department of Medicine I, Medical University Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Jelena Banfić
- Institute of Inorganic Chemistry University of Vienna, Waehringer Strasse 42, 1090 Vienna, Austria
| | - Sarah Theiner
- Research Platform "Translational Cancer Therapy Research," University of Vienna, Waehringer Strasse 42, 1090 Vienna, Austria
| | - Wilfried Körner
- Department of Environmental Geosciences, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Oliver Brüggemann
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
| | - Walter Berger
- Institute of Cancer Research and Comprehensive Cancer Center, Department of Medicine I, Medical University Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Bernhard K Keppler
- Research Platform "Translational Cancer Therapy Research," University of Vienna, Waehringer Strasse 42, 1090 Vienna, Austria
| | - Petra Heffeter
- Institute of Cancer Research and Comprehensive Cancer Center, Department of Medicine I, Medical University Vienna, Borschkegasse 8a, 1090 Vienna, Austria
| | - Ian Teasdale
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenberger Straße 69, 4040 Linz, Austria
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5
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Roth CM. Delivery of Genes and Oligonucleotides. Drug Deliv 2016. [DOI: 10.1002/9781118833322.ch25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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6
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Kim H, Okamoto H, Felber AE, Polomska A, Morone N, Heuser JE, Leroux JC, Murakami T. Polymer-coated pH-responsive high-density lipoproteins. J Control Release 2016; 228:132-140. [PMID: 26959846 DOI: 10.1016/j.jconrel.2016.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 02/22/2016] [Accepted: 03/03/2016] [Indexed: 02/01/2023]
Abstract
Intracellular drug delivery by nanoparticles is often hampered by their endosomal entrapment followed by their degradation in the lysosomal compartment and/or exocytosis. Here, we show that internalization and endosomal escape of cargoes in a cationized natural nanocarrier, high-density lipoprotein (HDL), can be controlled in a pH-dependent manner through stable complexation with a membranolytic anionic block polymer. A genetically and chemically cationized form of HDL (catHDL) is prepared for the first time by both genetic fusion with YGRKKRRQRRR peptide and incorporation of 1,2-dioleoyloxy-3-(trimethylammonium)propane. Upon addition of poly(ethylene glycol)-block-poly(propyl methacrylate-co-methacrylic acid) (PA), catHDL yields inhibition of internalization at neutral pH and its subsequent recovery at mildly acidic pH. catHDL forms a stable discoidal-shape complex with PA (catHDL/PA) (ca. 50 nm in diameter), even in the presence of serum. Significant enhancement of endosomal escape of a catHDL component is observed after a 1-h treatment of human cancer cells with catHDL/PA. Doxorubicin and curcumin, fluorescent anti-cancer drugs, encapsulated into catHDL/PA are also translocated outside of endosomes, compared with that into catHDL, and their cytotoxicities are enhanced inside the cells. These data suggest that catHDL/PA may have a potential benefit to improve the cellular delivery and endosomal escape of therapeutics under mildly acidic conditions such as in tumor tissues.
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Affiliation(s)
- Hyungjin Kim
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Haruki Okamoto
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Arnaud E Felber
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Anna Polomska
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Nobuhiro Morone
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - John E Heuser
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Jean-Christophe Leroux
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Tatsuya Murakami
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.
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7
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Peddada LY, Garbuzenko OB, Devore DI, Minko T, Roth CM. Delivery of antisense oligonucleotides using poly(alkylene oxide)-poly(propylacrylic acid) graft copolymers in conjunction with cationic liposomes. J Control Release 2014; 194:103-12. [PMID: 25192941 DOI: 10.1016/j.jconrel.2014.08.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 06/02/2014] [Accepted: 08/23/2014] [Indexed: 12/18/2022]
Abstract
The clinical application of gene silencing is hindered by poor stability and low delivery efficiency of naked oligonucleotides. Here, we present the in vitro and in vivo behaviors of a rationally designed, ternary, self-assembled nanoparticle complex, consisting of an anionic copolymer, cationic DOTAP liposome, and antisense oligonucleotide (AON). The multifunctional copolymers are based on backbone poly(propylacrylic acid) (PPAA), a pH-sensitive hydrophobic polymer, with grafted poly(alkylene oxides) (PAOs) varying in extent of grafting and PAO chemistry. The nanoparticle complexes with PPAA-g-PAO copolymers enhance antisense gene silencing effects in A2780 human ovarian cancer cells. A greater amount of AON is delivered to ovarian tumor xenografts using the ternary copolymer-stabilized delivery system, compared to a binary DOTAP/AON complex, following intraperitoneal injection in mice. Further, intratumoral injection of the nanoparticle complexes containing 1 mol% grafted PAO reduced tumoral bcl-2 expression by up to 60%. The data for complexes across the set of PAO polymers support a strong role for the hydrophilic-lipophilic balance of the graft copolymer in achieving serum stability and cellular uptake. Based upon these results, we anticipate that this novel nanoparticle delivery system can be extended to the delivery of plasmid DNA, siRNA, or aptamers for preclinical and clinical development.
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Affiliation(s)
- Lavanya Y Peddada
- Department of Biomedical Engineering, Rutgers University, Piscataway, USA
| | | | - David I Devore
- U.S. Army Institute of Surgical Research, Fort Sam Houston, 78234, USA
| | - Tamara Minko
- Department of Pharmaceutics, Rutgers University, Piscataway, USA
| | - Charles M Roth
- Department of Biomedical Engineering, Rutgers University, Piscataway, USA; Department of Chemical and Biochemical Engineering, Rutgers University, Piscataway, USA.
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8
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García-Astrain C, Gandini A, Peña C, Algar I, Eceiza A, Corcuera M, Gabilondo N. Diels–Alder “click” chemistry for the cross-linking of furfuryl-gelatin-polyetheramine hydrogels. RSC Adv 2014. [DOI: 10.1039/c4ra06122e] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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9
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Wilfert S, Iturmendi A, Henke H, Brüggemann O, Teasdale I. Thermoresponsive Polyphosphazene-Based Molecular Brushes by Living Cationic Polymerization. MACROMOLECULAR SYMPOSIA 2014; 337:116-123. [PMID: 24926189 PMCID: PMC4050288 DOI: 10.1002/masy.201450314] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A series of polyphosphazenes with molecular brush type structures have been prepared with controlled molecular weights and narrow polydispersities. The polymers show lower critical solution temperatures (LCST) between 18 and 90 °C, which can be easily tailored by choice of side-substituent to suit the required application. A temperature triggered self-assembly is observed to give stable colloidal aggregates with dimensions in the region of 100-300 nm.
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Affiliation(s)
- Sandra Wilfert
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Aitziber Iturmendi
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Helena Henke
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Oliver Brüggemann
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Ian Teasdale
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
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10
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Wilfert S, Iturmendi A, Schoefberger W, Kryeziu K, Heffeter P, Berger W, Brüggemann O, Teasdale I. Water-Soluble, Biocompatible Polyphosphazenes with Controllable and pH-Promoted Degradation Behavior. JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY 2014; 52:287-294. [PMID: 24729657 PMCID: PMC3980369 DOI: 10.1002/pola.27002] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 10/30/2013] [Indexed: 11/15/2022]
Abstract
The synthesis of a series of novel, water-soluble poly(organophosphazenes) prepared via living cationic polymerization is presented. The degradation profiles of the polyphosphazenes prepared are analyzed by GPC, 31P NMR spectroscopy, and UV-Vis spectroscopy in aqueous media and show tunable degradation rates ranging from days to months, adjusted by subtle changes to the chemical structure of the polyphosphazene. Furthermore, it is observed that these polymers demonstrate a pH-promoted hydrolytic degradation behavior, with a remarkably faster rate of degradation at lower pH values. These degradable, water soluble polymers with controlled molecular weights and structures could be of significant interest for use in aqueous biomedical applications, such as polymer therapeutics, in which biological clearance is a requirement and in this context cell viability tests are described which show the non-toxic nature of the polymers as well as their degradation intermediates and products.
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Affiliation(s)
- Sandra Wilfert
- Institute of Polymer Chemistry, Johannes Kepler University LinzWelser Street 42, 4060, Leonding, Austria
| | - Aitziber Iturmendi
- Institute of Polymer Chemistry, Johannes Kepler University LinzWelser Street 42, 4060, Leonding, Austria
| | - Wolfgang Schoefberger
- Institute of Organic Chemistry, Johannes Kepler University LinzAltenberger Street 69, 4040, Linz, Austria
- Faculty of Science, University of South BohemiaBranišovská 31, 370 05, České Budějovice, Czech Republic
| | - Kushtrim Kryeziu
- Institute of Cancer Research and Comprehensive Cancer Center of the Medical University of Vienna, Medical University of ViennaBorschkegasse 8a, 1090, Vienna, Austria
| | - Petra Heffeter
- Institute of Cancer Research and Comprehensive Cancer Center of the Medical University of Vienna, Medical University of ViennaBorschkegasse 8a, 1090, Vienna, Austria
- Research and Platform “Translational Cancer Therapy Research,”Vienna, Austria
| | - Walter Berger
- Institute of Cancer Research and Comprehensive Cancer Center of the Medical University of Vienna, Medical University of ViennaBorschkegasse 8a, 1090, Vienna, Austria
- Research and Platform “Translational Cancer Therapy Research,”Vienna, Austria
| | - Oliver Brüggemann
- Institute of Polymer Chemistry, Johannes Kepler University LinzWelser Street 42, 4060, Leonding, Austria
| | - Ian Teasdale
- Institute of Polymer Chemistry, Johannes Kepler University LinzWelser Street 42, 4060, Leonding, Austria
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11
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Mishra S, Vaughn AD, Devore DI, Roth CM. Delivery of siRNA silencing Runx2 using a multifunctional polymer-lipid nanoparticle inhibits osteogenesis in a cell culture model of heterotopic ossification. Integr Biol (Camb) 2013; 4:1498-507. [PMID: 23146945 DOI: 10.1039/c2ib20200j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Heterotopic ossification (HO) associated with traumatic neurological or musculoskeletal injuries remains a major clinical challenge. One approach to understanding better and potentially treating this condition is to silence one or more genes believed to be responsible for osteogenesis by small interfering RNA (siRNA) post-injury. Improved methods of delivering siRNA to myoprogenitor cells as well as relevant cell culture models of HO are needed to advance this approach. We utilize a model of HO featuring C2C12 myoprogenitor cells stimulated to the osteogenic phenotype by addition of BMP-2. For siRNA delivery, we utilize a nanocomposite consisting of DOTAP-based cationic liposomes coated with a graft copolymer of poly(propylacrylic acid) grafted with polyetheramine (Jeffamine), as this system has been shown previously to deliver antisense oligonucleotides safely into cells and out of endosomes for gene silencing in vitro and in vivo. Delivery of siRNA targeting Runx2, a transcription factor downstream of BMP-2, to stimulated C2C12 cells produced greater than 60% down-regulation of the Runx2 gene. This level of gene silencing was sufficient to inhibit alkaline phosphatase activity over the course of several days and calcium phosphate deposition over the course of 2 weeks. These results show the utility of the BMP-2/C2C12 model for capturing the cellular cell-fate decision in HO. Further, they suggest DOTAP/PPAA-g-Jeffamine as a promising delivery system for siRNA-based therapy for HO.
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Affiliation(s)
- Swati Mishra
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08854, USA
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12
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Niece KL, Vaughan AD, Devore DI. Graft copolymer polyelectrolyte complexes for delivery of cationic antimicrobial peptides. J Biomed Mater Res A 2013; 101:2548-58. [PMID: 23364909 DOI: 10.1002/jbm.a.34555] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 12/03/2012] [Accepted: 12/04/2012] [Indexed: 12/26/2022]
Abstract
Peptides have enormous potential as therapeutic agents for the treatment of infection, in immunomodulation and for other medical applications, but their hydrolytic degradation in biological fluids is a serious limitation to their in vivo performance. Here we demonstrate the potential utility of polyelectrolyte nanoparticle complexes of novel self-assembling anionic graft copolymers for protecting peptides from degradation in human plasma. The anionic graft copolymers are synthesized by covalently attaching pendent polyetheramine chains to poly(alkylacrylic acid) backbones by carbodiimide coupling. The peptide:copolymer nanocomplexes' particle size, zeta-potential, peptide binding, and controlled release of the peptide are shown to be dependent upon the pendent chain graft density, polymer backbone alkyl groups (propyl vs. methyl), and the nanocomplexes' electrostatic charge ratio. The nanocomplexes can provide substantial protection to the bound peptides from degradation in human plasma for at least 24 h and, in standard microbiological assays are shown to retain some or all of the peptide's antimicrobial activity against a clinically relevant strain of Staphylococcus aureus.
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Affiliation(s)
- Krista L Niece
- U.S. Army Institute of Surgical Research, 3698 Chambers Pass, Fort Sam Houston, Texas 78234, USA
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13
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Liu C, Zhang N. Emerging biotechnological strategies for non-viral antiangiogenic gene therapy. Angiogenesis 2012; 15:521-42. [DOI: 10.1007/s10456-012-9295-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 08/04/2012] [Indexed: 01/08/2023]
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14
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Mishra S, Peddada LY, Devore DI, Roth CM. Poly(alkylene oxide) copolymers for nucleic acid delivery. Acc Chem Res 2012; 45:1057-66. [PMID: 22260518 PMCID: PMC3361000 DOI: 10.1021/ar200232n] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The advancement of gene-based therapeutics to the clinic is limited by the ability to deliver physiologically relevant doses of nucleic acids to target tissues safely and effectively. Over the last couple of decades, researchers have successfully employed polymer and lipid based nanoassemblies to deliver nucleic acids for the treatment of a variety of diseases. Results of phase I/II clinical studies to evaluate the efficacy and biosafety of these gene delivery vehicles have been encouraging, which has promoted the design of more efficient and biocompatible systems. Research has focused on designing carriers to achieve biocompatibility, stability in the circulatory system, biodistribution to target the disease site, and intracellular delivery, all of which enhance the resulting therapeutic effect. The family of poly(alkylene oxide) (PAO) polymers includes random, block, and branched structures, among which the ABA type triblocks copolymers of ethylene oxide (EO) and propylene oxide (PO) (commercially known as Pluronic) have received the greatest consideration. In this Account, we highlight examples of polycation-PAO conjugates, liposome-PAO formulations, and PAO micelles for nucleic acid delivery. Among the various polymer design considerations, which include molecular weight of polymer, molecular weight of blocks, and length of blocks, the overall hydrophobic-lipophilic balance (HLB) is a critical parameter in defining the behavior of the polymer conjugates for gene delivery. We discuss the effects of varying this parameter in the context of improving gene delivery processes, such as serum stability and association with cell membranes. Other innovative macromolecular modifications discussed in this category include our work to enhance the serum stability and efficiency of lipoplexes using PAO graft copolymers, the development of a PAO gel-based carrier for sustained and stimuli responsive delivery, and the development of biodegradable PAO-based amphiphilic block copolymers.
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Affiliation(s)
- Swati Mishra
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Rd, Piscataway, NJ 08854
| | - Lavanya Y. Peddada
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Rd, Piscataway, NJ 08854
| | - David I. Devore
- U.S. Army Institute of Surgical Research, Battlefield Health and Trauma Research Institute, 3698 Chambers Pass, Bld.3611, Fort Sam Houston, TX 78234-6315
| | - Charles M. Roth
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Rd, Piscataway, NJ 08854
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Rd, Piscataway, NJ 08854
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15
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Dulong V, Mocanu G, Picton L, Le Cerf D. Amphiphilic and thermosensitive copolymers based on pullulan and Jeffamine®: Synthesis, characterization and physicochemical properties. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.09.049] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Sui X, Shi Y, Fu Z. Novel degradable polymer networks containing acetal components. Sci China Chem 2011. [DOI: 10.1007/s11426-011-4223-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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18
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Lee ALZ, Dhillon SHK, Wang Y, Pervaiz S, Fan W, Yang YY. Synergistic anti-cancer effects via co-delivery of TNF-related apoptosis-inducing ligand (TRAIL/Apo2L) and doxorubicin using micellar nanoparticles. MOLECULAR BIOSYSTEMS 2011; 7:1512-22. [DOI: 10.1039/c0mb00266f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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19
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Lee ALZ, Wang Y, Pervaiz S, Fan W, Yang YY. Synergistic Anticancer Effects Achieved by Co-Delivery of TRAIL and Paclitaxel Using Cationic Polymeric Micelles. Macromol Biosci 2010; 11:296-307. [DOI: 10.1002/mabi.201000332] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 10/01/2010] [Indexed: 12/11/2022]
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20
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Specific down regulation of 3T3-L1 adipocyte differentiation by cell-permeable antisense HIF1alpha-oligonucleotide. J Control Release 2010; 144:82-90. [PMID: 20109509 DOI: 10.1016/j.jconrel.2010.01.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 01/12/2010] [Accepted: 01/15/2010] [Indexed: 02/05/2023]
Abstract
Hypoxia is a strong modulator of angiogenesis, accelerating adipose tissue expansion, suggesting that hypoxia inducible factor 1alpha (HIF1alpha) can be a novel target for anti-obesity. We conjugated antisense-HIF1alpha-oligonucleotide (ASO) with low molecular weight protamine (LMWP), a cell-penetrating peptide, to enhance its ability to block hypoxic-angiogenesis, thereby eliciting an anti-obesity effect. Nano-sized ASO-LMWP (AS-L) conjugates enhanced cellular uptake of ASO without yielding a cytotoxic effect and protected the ASO against enzymatic attack and chemical reduction. AS-L showed enhanced intra-cellular localization compared to naked ASO and the complex of ASO with lipofectamine during hypoxic-differentiation. Consequently AS-L induced significant down-regulation of leptin and VEGF gene expressions, thereby reducing fat accumulation in the cell. This proof-of-concept study shows that AS-L produces an inhibitory effect on adipogenesis and angiogenesis during differentiation, indicating LMWP mediated ASO delivery can potentially be a safe and promising treatment for obesity.
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