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Ghalamfarsa G, Hojjat-Farsangi M, Mohammadnia-Afrouzi M, Anvari E, Farhadi S, Yousefi M, Jadidi-Niaragh F. Application of nanomedicine for crossing the blood–brain barrier: Theranostic opportunities in multiple sclerosis. J Immunotoxicol 2016; 13:603-19. [DOI: 10.3109/1547691x.2016.1159264] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ghasem Ghalamfarsa
- Medicinal Plants Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Mohammad Hojjat-Farsangi
- Department of Oncology-Pathology, Immune and Gene Therapy Lab, Cancer Center Karolinska (CCK), Karolinska University Hospital Solna and Karolinska Institute, Stockholm, Sweden
- Department of Immunology, School of Medicine, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Mousa Mohammadnia-Afrouzi
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Enayat Anvari
- Department of Physiology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - Shohreh Farhadi
- Department of Agricultural Engineering, Islamic Azad University, Tehran
| | - Mehdi Yousefi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farhad Jadidi-Niaragh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Kanazawa T. Brain delivery of small interfering ribonucleic acid and drugs through intranasal administration with nano-sized polymer micelles. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2015; 8:57-64. [PMID: 25610007 PMCID: PMC4294762 DOI: 10.2147/mder.s70856] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Recently, the development of effective strategies for enhancing drug delivery to the brain has been a topic of great interest in both clinical and pharmaceutical fields. In this review, we summarize our studies evaluating nose-to-brain delivery of drugs and small interfering ribonucleic acids in combination with cell-penetrating peptide-modified polymer micelles. Our findings show that the use of polymer micelles with surface modification with Tat peptide in the intranasal administration enables the non-invasive delivery of therapeutic agents to the brain by increasing the transfer of the administered drug or small interfering ribonucleic acid to the central nervous system from the nasal cavity.
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Affiliation(s)
- Takanori Kanazawa
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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Wang W, Zhang J, Li C, Huang P, Gao S, Han S, Dong A, Kong D. Facile access to cytocompatible multicompartment micelles with adjustable Janus-cores from A-block-B-graft-C terpolymers prepared by combination of ROP and ATRP. Colloids Surf B Biointerfaces 2013; 115:302-9. [PMID: 24389334 DOI: 10.1016/j.colsurfb.2013.12.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 12/08/2013] [Accepted: 12/10/2013] [Indexed: 11/28/2022]
Abstract
The architecture of hydrophobic segments can determine the specific morphology of multicompartment micelles (MCMs) that are generated from aqueous assembly of amphiphilic terpolymers. In this study, we aimed to design and generate poly(ɛ-caprolactone)-based multicompartment micelles with adjustable Janus-cores. Well-defined terpolymers with a novel A-block-B-graft-C architecture composed of biologically compatible polymers, methoxy poly(ethylene glycol) (PEG), poly(ɛ-caprolactone) (PCL) and poly(2-(perfluorobutyl)ethyl methacrylate) (PPFEMA), were prepared by the stepwise use of ring-opening polymerization and atom transfer radical polymerization. Characterization of the obtained terpolymers was carried out by (1)H NMR and gel permeation chromatography. Results from differential scanning calorimetry and X-ray diffraction studies indicated that within the terpolymer structure, the PCL segments are in the crystalline state, while fluorocarbon segments belong to the amorphous domains. Due to the thermodynamic incompatibility of PCL and PPFEMA, MCMs could be obtained upon aqueous self-assembly of the terpolymer. The well-segregated Janus-cores with adjustable compartment balance were revealed by transmission electron microscopy. In vitro cell viability assays further demonstrated an excellent cytocompatibility of the MCMs both in mouse embryonic fibroblasts (3T3) and human acute monocytic leukemia (THP-1) cells.
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Affiliation(s)
- Weiwei Wang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Science, Tianjin 300192, China
| | - Ju Zhang
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Science, Tianjin 300192, China
| | - Chen Li
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Science, Tianjin 300192, China
| | - Pingsheng Huang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Shan Gao
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Science, Tianjin 300192, China
| | - Shangcong Han
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Anjie Dong
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Deling Kong
- Tianjin Key Laboratory of Biomaterial Research, Institute of Biomedical Engineering, Chinese Academy of Medical Science, Tianjin 300192, China.
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Delivery of siRNA to the brain using a combination of nose-to-brain delivery and cell-penetrating peptide-modified nano-micelles. Biomaterials 2013; 34:9220-6. [PMID: 23992922 DOI: 10.1016/j.biomaterials.2013.08.036] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 08/13/2013] [Indexed: 12/22/2022]
Abstract
The potential for RNA-based agents to serve as effective therapeutics for central nerve systems (CNS) disorders has been successfully demonstrated in vitro. However, the blood-brain barrier limits the distribution of systemically administered therapeutics to the CNS, posing a major challenge for drug development aimed at combatting CNS disorders. Therefore, the development of effective strategies to enhance siRNA delivery to the brain is of great interest in clinical and pharmaceutical fields. To improve the efficiency of small interfering RNA (siRNA) delivery to the brain, we developed a nose-to-brain delivery system combined with cell-penetrating peptide (CPP) modified nano-micelles comprising polyethylene glycol-polycaprolactone (PEG-PCL) copolymers conjugated with the CPP, Tat (MPEG-PCL-Tat). In this study, we describe intranasal brain delivery of siRNA or dextran (Mw: 10,000 Da) as a model siRNA, by using MPEG-PCL-Tat. Intranasal delivery of dextran with MPEG-PCL-Tat improved brain delivery compared to intravenous delivery of dextran either with or without MPEG-PCL-Tat. We also studied the intranasal transfer of MPEG-PCL-Tat to the brain via the olfactory and trigeminal nerves, the putative pathways to the brain from the nasal cavity. We found that MPEG-PCL-Tat accelerated transport along the olfactory and trigeminal nerve pathway because of its high permeation across the nasal mucosa.
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Sisson AL, Ekinci D, Lendlein A. The contemporary role of ε-caprolactone chemistry to create advanced polymer architectures. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.04.045] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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6
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Gao X, Wang B, Wei X, Rao W, Ai F, Zhao F, Men K, Yang B, Liu X, Huang M, Gou M, Qian Z, Huang N, Wei Y. Preparation, characterization and application of star-shaped PCL/PEG micelles for the delivery of doxorubicin in the treatment of colon cancer. Int J Nanomedicine 2013; 8:971-82. [PMID: 23493403 PMCID: PMC3593767 DOI: 10.2147/ijn.s39532] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Star-shaped polymer micelles have good stability against dilution with water, showing promising application in drug delivery. In this work, biodegradable micelles made from star-shaped poly(å-caprolactone)/poly(ethylene glycol) (PCL/PEG) copolymer were prepared and used to deliver doxorubicin (Dox) in vitro and in vivo. First, an acrylated monomethoxy poly (ethylene glycol)-poly(å-caprolactone) (MPEG-PCL) diblock copolymer was synthesized, which then self-assembled into micelles, with a core-shell structure, in water. Then, the double bonds at the end of the PCL blocks were conjugated together by radical polymerization, forming star-shaped MPEG-PCL (SSMPEG-PCL) micelles. These SSMPEG-PCL micelles were monodispersed (polydispersity index = 0.11), with mean diameter of ≈25 nm, in water. Blank SSMPEG-PCL micelles had little cytotoxicity and did not induce obvious hemolysis in vitro. The critical micelle concentration of the SSMPEG-PCL micelles was five times lower than that of the MPEG-PCL micelles. Dox was directly loaded into SSMPEG-PCL micelles by a pH-induced self-assembly method. Dox loading did not significantly affect the particle size of SSMPEG-PCL micelles. Dox-loaded SSMPEG-PCL (Dox/SSMPEG-PCL) micelles slowly released Dox in vitro, and the Dox release at pH 5.5 was faster than that at pH 7.0. Also, encapsulation of Dox in SSMPEG-PCL micelles enhanced the anticancer activity of Dox in vitro. Furthermore, the therapeutic efficiency of Dox/SSMPEG-PCL on colon cancer mouse model was evaluated. Dox/SSMPEG-PCL caused a more significant inhibitory effect on tumor growth than did free Dox or controls (P < 0.05), which indicated that Dox/SSMPEG-PCL had enhanced anticolon cancer activity in vivo. Analysis with terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) showed that Dox/SSMPEG-PCL induced more tumor cell apoptosis than free Dox or controls. These results suggested that SSMPEG-PCL micelles have promising application in doxorubicin delivery for the enhancement of anticancer effect.
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Affiliation(s)
- Xiang Gao
- Department of Pathophysiology, College of Preclinical and Forensic Medical Sciences, and State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, People's Republic of China
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Kanazawa T, Sugawara K, Tanaka K, Horiuchi S, Takashima Y, Okada H. Suppression of tumor growth by systemic delivery of anti-VEGF siRNA with cell-penetrating peptide-modified MPEG–PCL nanomicelles. Eur J Pharm Biopharm 2012; 81:470-7. [DOI: 10.1016/j.ejpb.2012.04.021] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 04/25/2012] [Accepted: 04/26/2012] [Indexed: 11/30/2022]
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Tripathi SK, Goyal R, Ansari K, Ravi Ram K, Shukla Y, Chowdhuri D, Gupta K. Polyglutamic acid-based nanocomposites as efficient non-viral gene carriers in vitro and in vivo. Eur J Pharm Biopharm 2011; 79:473-84. [DOI: 10.1016/j.ejpb.2011.07.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 07/11/2011] [Accepted: 07/14/2011] [Indexed: 10/17/2022]
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GOYAL RITU, TRIPATHI SUSHILKUMAR, SWAMI ARCHANA, GUPTA KAILASHCHAND. EFFICIENT DELIVERY OF NUCLEIC ACIDS BY USING MODIFIED POLYETHYLENIMINE-BASED NANOPARTICLES. INTERNATIONAL JOURNAL OF NANOSCIENCE 2011. [DOI: 10.1142/s0219581x11007806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Branched polyethylenimine, (b PEI, 25 kDa), was converted into nanoparticles by using three different crosslinkers, 1,6-hexanebisphosphate (HP), adipic acid (AA), and 1,4-butane dialdehyde (BA), having same carbon chain length (C-6), and the effect of ionic and covalent crosslinking on the transfection efficiency was studied. The synthesized nanoparticles were characterized by 1H-NMR, IR, DLS, AFM, and TEM. The entire series of nanoparticles was tested for their toxicity and ability to deliver genes in COS-1 and CHO cell lines. It was observed that, AAP-3 nanoparticle/DNA complex exhibited highest transfection efficiency (~2.1–10.7 folds) than the native PEI and commercially available transfection reagents, such as GenePORTER 2TM, LipofectamineTM, and SuperfectTM, with cell viability >80%. Among the series, the highest cell viability was observed with BAP nanoparticles (>96%). These nanoparticles were able to deliver GFP-siRNA very efficiently inside the cells with ~76%–90% suppression of EGFP expression. Cellular trafficking studies showed that these nanoparticles carry pDNA inside the nucleus of the cells within 2 h of the addition to the cells.
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Affiliation(s)
- RITU GOYAL
- Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi-110007, India
| | - SUSHIL KUMAR TRIPATHI
- Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi-110007, India
| | - ARCHANA SWAMI
- Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi-110007, India
| | - KAILASH CHAND GUPTA
- Institute of Genomics and Integrative Biology, Mall Road, Delhi University Campus, Delhi-110007, India
- Indian Institute of Toxicology Research, M.G. Road, Lucknow-226 001, U.P., India
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Fuchs S, Winter G, Coester C. Ultrasonic resonator technology as a new quality control method evaluating gelatin nanoparticles. J Microencapsul 2010; 27:242-52. [PMID: 20406094 DOI: 10.3109/02652040903079534] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Nanomedicine is a quickly evolving field where more and more possible applications become evident and start entering clinical trials or even the market. However, the analytic methods are not always able to keep pace with the new formulations' demands. One example of a promising medical implementation is oligodeoxynucleotide (ODN) delivery by gelatin nanoparticles (GNPs). Currently, quality control is dependent on either some time consuming or destructive spectrometric, chromatographic or electrophoretic methods. A possible enlargement of the portfolio by Ultrasonic Resonator Technology (URT) is investigated here by subjecting plain GNPs in various sizes and concentrations as well as ODN-loaded GNPs to URT analysis. If calibrated by photon correlation spectroscopy (PCS) and other spectroscopy methods for each single nanoparticle system parameter, URT is an efficient and non-destructive technique and serves as a broad characterization method. URT is emphasized to play a possible future part in the size, concentration and ODN loading monitoring, e.g. of gelatin nanoparticles in the course of formulation development.
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Affiliation(s)
- Sebastian Fuchs
- Department of Pharmacy, Pharmaceutical Technology and Biopharmacy, Ludwig Maximilians University, Munich, Germany
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Khondee S, Yakovleva T, Berkland C. Low charge polyvinylamine nanogels offer sustained, low-level gene expression. J Appl Polym Sci 2010. [DOI: 10.1002/app.32460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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Guo S, Wang W, Deng L, Xing J, Dong A. Poly(ε-caprolactone)-graft-poly(2-(dimethylamino)ethyl methacrylate) Amphiphilic Copolymers Prepared via a Combination of ROP and ATRP: Synthesis, Characterization, and Self-Assembly Behavior. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.201000103] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Wei X, Gong C, Gou M, Fu S, Guo Q, Shi S, Luo F, Guo G, Qiu L, Qian Z. Biodegradable poly(ɛ-caprolactone)–poly(ethylene glycol) copolymers as drug delivery system. Int J Pharm 2009; 381:1-18. [DOI: 10.1016/j.ijpharm.2009.07.033] [Citation(s) in RCA: 256] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2009] [Revised: 07/25/2009] [Accepted: 07/29/2009] [Indexed: 01/02/2023]
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14
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Yang L, Webster TJ. Nanotechnology controlled drug delivery for treating bone diseases. Expert Opin Drug Deliv 2009; 6:851-64. [DOI: 10.1517/17425240903044935] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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15
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Effect of homobifunctional crosslinkers on nucleic acids delivery ability of PEI nanoparticles. Int J Pharm 2009; 374:125-38. [DOI: 10.1016/j.ijpharm.2009.03.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2008] [Revised: 03/05/2009] [Accepted: 03/06/2009] [Indexed: 11/18/2022]
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16
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Pignatello R, Musumeci T, Impallomeni G, Carnemolla GM, Puglisi G, Ballistreri A. Poly(3-hydroxybutyrate-co-ɛ-caprolactone) copolymers and poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-ɛ-caprolactone) terpolymers as novel materials for colloidal drug delivery systems. Eur J Pharm Sci 2009; 37:451-62. [DOI: 10.1016/j.ejps.2009.03.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Dong L, Zuo L, Xia S, Gao S, Zhang C, Chen J, Zhang J. Reduction of liver tumor necrosis factor-alpha expression by targeting delivery of antisense oligonucleotides into Kupffer cells protects rats from fulminant hepatitis. J Gene Med 2009; 11:229-39. [PMID: 19189285 DOI: 10.1002/jgm.1293] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Fulminant liver failure can cause extreme mortality due to the lack of effective and targeting therapeutics for the disease. Novel therapeutics using antisense technology require an efficient and safe delivery system with Kupffer cell targeting ability. METHODS We explored the capacity of galactosylated low molecular weight chitosan (GLC) to efficiently mediate the antisense oligonucleotide (ASO) TJU-2755 into Kupffer cells, enhance the effect of the oligonucleotides on the suppression of tumor necrosis factor (TNF)-alpha and prolong the active time of the antisense drug in vivo. The protective and therapeutic effect of ASO/GLC in the animal model of D-galactosamine/lipopolysaccharide-induced fulminant hepatitis was tested. RESULTS ASOs delivered by GLC were concentrated in Kupffer cells and more potent in reducing the expression of TNF-alpha mRNA, as well as reducing serum TNF-alpha levels. Furthermore, the ASO/GLC complex successfully rescued animals from fulminant hepatitis and mortality. Compared to naked ASO, the complex notably reduced the dose administrated in animals and prolonged its effectiveness. A single dose of 5 mg ASO per kg body weight achieved a satisfactory effect after 5 days, and 20 mg ASO per kg body weight preserved 70% of the effect after more than 2 weeks. Its efficacy was affirmed through both pretreatment and therapeutic use after liver damage had begun. CONCLUSIONS Inhibiting TNF-alpha expression in the liver by this strategy represents a novel therapeutic approach that may be valuable for the treatment of some inflammation-related liver diseases.
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Affiliation(s)
- Lei Dong
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Biochemistry, Nanjing University, Nanjing, China
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Drug delivery of siRNA therapeutics: potentials and limits of nanosystems. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2009; 5:8-20. [DOI: 10.1016/j.nano.2008.06.001] [Citation(s) in RCA: 173] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2008] [Revised: 05/21/2008] [Accepted: 06/04/2008] [Indexed: 11/21/2022]
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19
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Haglund E, Seale-Goldsmith MM, Leary JF. Design of Multifunctional Nanomedical Systems. Ann Biomed Eng 2009; 37:2048-63. [DOI: 10.1007/s10439-009-9640-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2008] [Accepted: 01/09/2009] [Indexed: 11/30/2022]
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20
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The synthesis of cationic polyurethanes to study the effect of amines and structures on their DNA transfection potential. J Control Release 2009; 133:68-76. [DOI: 10.1016/j.jconrel.2008.09.082] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 09/10/2008] [Accepted: 09/18/2008] [Indexed: 11/18/2022]
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Biodegradable amphiphilic poly(ethylene oxide)-block-polyesters with grafted polyamines as supramolecular nanocarriers for efficient siRNA delivery. Biomaterials 2009; 30:242-53. [DOI: 10.1016/j.biomaterials.2008.09.025] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Accepted: 09/02/2008] [Indexed: 01/06/2023]
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Abstract
Nanotechnology has been increasingly utilized to enhance bone tissue engineering strategies. In particular, nanotechnology has been employed to overcome some of the current limitations associated with bone regeneration methods including insufficient mechanical strength of scaffold materials, ineffective cell growth and osteogenic differentiation at the defect site, as well as unstable and insufficient production of growth factors to stimulate bone cell growth. Among the tremendous technologies of nanoparticles in biological systems, we focus here on the three major nanoparticle research areas that have been developed to overcome these limitations and disadvantages: (a) the generation of nanoparticle-composite scaffolds to provide increased mechanical strength for bone graft, (b) the fabrication of nanofibrous scaffolds to support cell growth and differentiation through morphologically-favored architectures, and (c) the development of novel delivery and targeting systems of genetic material, especially those encoding osteogenic growth factors. These nanoparticle-based bone tissue engineering technologies possess a great potential to ensure the efficacy of clinical bone regeneration.
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Affiliation(s)
- Kyobum Kim
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20742, USA
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Huang D, Korolev N, Eom KD, Tam JP, Nordenskiöld L. Design and Biophysical Characterization of Novel Polycationic ϵ-Peptides for DNA Compaction and Delivery. Biomacromolecules 2007; 9:321-30. [DOI: 10.1021/bm700882g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Dandan Huang
- School of Biological Sciences, Nanyang Technological University, 60, Nanyang Drive, Singapore 637551, and Biochemistry, The Scripps Research Institute, Parkside Drive, Jupiter, Florida 33458
| | - Nikolay Korolev
- School of Biological Sciences, Nanyang Technological University, 60, Nanyang Drive, Singapore 637551, and Biochemistry, The Scripps Research Institute, Parkside Drive, Jupiter, Florida 33458
| | - Khee Dong Eom
- School of Biological Sciences, Nanyang Technological University, 60, Nanyang Drive, Singapore 637551, and Biochemistry, The Scripps Research Institute, Parkside Drive, Jupiter, Florida 33458
| | - James P. Tam
- School of Biological Sciences, Nanyang Technological University, 60, Nanyang Drive, Singapore 637551, and Biochemistry, The Scripps Research Institute, Parkside Drive, Jupiter, Florida 33458
| | - Lars Nordenskiöld
- School of Biological Sciences, Nanyang Technological University, 60, Nanyang Drive, Singapore 637551, and Biochemistry, The Scripps Research Institute, Parkside Drive, Jupiter, Florida 33458
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Xu DM, Yao SD, Liu YB, Sheng KL, Hong J, Gong PJ, Dong L. Size-dependent properties of M-PEIs nanogels for gene delivery in cancer cells. Int J Pharm 2007; 338:291-6. [PMID: 17367967 DOI: 10.1016/j.ijpharm.2007.01.050] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Revised: 01/19/2007] [Accepted: 01/28/2007] [Indexed: 11/17/2022]
Abstract
Polyethyleneimine nanogels (named as M-PEIs) with different sizes were prepared by photo-Fenton reaction in aqueous solution from which samples of 38, 75, 87, 121, 132 and 167nm were selected for in vitro transfection. The homogeneous structure and the same component made it possible to study the size effect of M-PEIs nanogels on gene transfection efficiency when loading the same quantity of plasmid DNA (pLEGFP-C1) into A549, Bel7402, BGC-823 and Hela cells. M-PEIs and its DNA complexes were characterized by photo correlation spectroscopy and atomic force microscopy. The protein expression was observed by flow cytometry and fluorescence microscopy. All of the DNA complexes had no obvious cytotoxicity and the surface charges were positive charged at the optimum weight ratio. Therefore, the expressed protein was affected by the size of M-PEIs when the same quantity of DNA was used to transfect cells. In addition, the samples of 75 and 87nm yielded the highest transfection efficiency about 30% in all of the four cell lines which were also cell line independent.
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Affiliation(s)
- Dong-Mei Xu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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25
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Agarwal A, Vilensky R, Stockdale A, Talmon Y, Unfer RC, Mallapragada SK. Colloidally stable novel copolymeric system for gene delivery in complete growth media. J Control Release 2007; 121:28-37. [PMID: 17614155 DOI: 10.1016/j.jconrel.2007.05.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Revised: 05/01/2007] [Accepted: 05/08/2007] [Indexed: 12/14/2022]
Abstract
Novel cationic pentablock copolymers based on poly(2-diethylaminoethylmethacrylate) (PDEAEM) and Pluronic F127 were evaluated as non-viral gene delivery vectors from a physiochemical point of view for stability and transfection efficiency in complete growth media. A novel strategy was introduced to sterically stabilize the polyplexes of such Pluronic-based cationic polymers against aggregation with serum proteins. As cationic pentablock copolymers condense plasmid DNA into nanoplexes of 100-150 nm diameter, unmodified Pluronic added to the formulation self-assemble with the pentablock copolymers on the surface of polyplexes and shield the cationic PDEAEM chains of pentablock copolymers sterically with its long poly(ethyleneoxide) chains. These coated polyplexes formed colloidally stable dispersions of 150-250 nm diameter in serum-supplemented buffers. Cryo-TEM micrographs also showed that coating polyplexes with unmodified Pluronic reduced aggregation in serum proteins. Pentablock copolymers preserved the integrity of plasmid DNA condensed inside the polyplexes and provided efficient resistance to its degradation by nucleases. Though the total amount of DNA retained by ExGen 500 polyplexes after nuclease digestion was more than that retained by pentablock copolymers, the amount of plasmid retained in supercoiled form was not significantly different. Polyplexes coated with unmodified Pluronic provided efficient transfection in SKOV3 cells in complete growth media, comparable to that provided by ExGen 500 in terms of number of cells transfected, and one order less in terms of total transgene protein expressed. These sterically shielded polyplexes also exhibited much lower cytotoxicities than uncoated polyplexes of pentablock copolymers, and significantly lower than the cytotoxicity of ExGen 500 at relevant concentrations. This colloidally stable, versatile, multi-component gene delivery system also forms thermo-reversible injectable hydrogels like Pluronics at physiological temperatures that can be used for sustained delivery of polyplexes, and is promising for systemic applications.
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Affiliation(s)
- Ankit Agarwal
- Department of Chemical Engineering, Iowa State University, 3035 Sweeny Hall, Ames, IA 50011-2230, USA
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Vorhies JS, Nemunaitis J. Nonviral delivery vehicles for use in short hairpin RNA-based cancer therapies. Expert Rev Anticancer Ther 2007; 7:373-82. [PMID: 17338656 DOI: 10.1586/14737140.7.3.373] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The use of DNA vector-based short hairpin (sh)RNA for RNA interference shows promise as a precise means for the disruption of gene expression to achieve a therapeutic effect. The in vivo usage of shRNA therapeutics in cancer is limited by obstacles related to effective delivery into the nuclei of target cancer cells. Nonviral delivery vehicles that are relevant for shRNA delivery into humans belong to a group of substances about which significant preclinical data has been amassed to show an acceptable safety profile, resistance to immune defenses and good transfection efficiency. Here, we review the most promising current nonviral gene delivery vehicles with a focus on their potential use in cancer shRNA therapeutics.
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Affiliation(s)
- John S Vorhies
- Mary Crowley Medical Research Center, 1717 Main St, Suite 6000, Dallas, TX 75201, USA.
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