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Dong L, Li Y, Cong H, Yu B, Shen Y. A review of chitosan in gene therapy: Developments and challenges. Carbohydr Polym 2024; 324:121562. [PMID: 37985064 DOI: 10.1016/j.carbpol.2023.121562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/14/2023] [Accepted: 11/03/2023] [Indexed: 11/22/2023]
Abstract
Gene therapy, as a revolutionary treatment, has been gaining more and more attention. The key to gene therapy is the selection of suitable vectors for protection of exogenous nucleic acid molecules and enabling their specific release in target cells. While viral vectors have been widely used in researches, non-viral vectors are receiving more attention due to its advantages. Chitosan (CS) has been widely used as non-viral organic gene carrier because of its good biocompatibility and its ability to load large amounts of nucleic acids. This paper summarizes and evaluates the potential of chitosan and its derivatives as gene delivery vector materials, along with factors influencing transfection efficiency, performance evaluation, ways to optimize infectious efficiency, and the current main research development directions. Additionally, it provides an outlook on its future prospects.
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Affiliation(s)
- Liang Dong
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, Qingdao University, Qingdao 266071, China
| | - Yanan Li
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, Qingdao University, Qingdao 266071, China
| | - Hailin Cong
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, Qingdao University, Qingdao 266071, China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China; School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Bing Yu
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, Qingdao University, Qingdao 266071, China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
| | - Youqing Shen
- College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Institute of Biomedical Materials and Engineering, Qingdao University, Qingdao 266071, China; Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Center for Bionanoengineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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2
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Purification and Surface Modification of Chitosan-based Polyplexes Using Tangential Flow Filtration and Coating by Hyaluronic Acid. J Pharm Sci 2022; 111:2857-2866. [DOI: 10.1016/j.xphs.2022.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 05/25/2022] [Accepted: 05/25/2022] [Indexed: 11/16/2022]
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Fundamental and Practical Aspects in the Formulation of Colloidal Polyelectrolyte Complexes of Chitosan and siRNA. Methods Mol Biol 2021. [PMID: 33928582 DOI: 10.1007/978-1-0716-1298-9_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The formation of electrostatic interactions between polyanionic siRNA and polycations gives an easy access to the formation of colloidal particles capable of delivering siRNA in vitro or in vivo. Among the polycations used for siRNA delivery, chitosan occupies a special place due to its unique physicochemical and biological properties. In this chapter we describe the fundamental and practical aspects of the formation of colloidal complexes between chitosan and siRNA. The basis of the electrostatic complexation between oppositely charged polyelectrolytes is first introduced with a focus on the specific conditions to obtain stable colloid complex particles. Subsequent, the properties that make chitosan so special are described. In a third part, the main parameters influencing the colloidal properties and stability of siRNA/chitosan complexes are reviewed with emphasis on some practical aspects to consider in the preparation of complexes.
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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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Wang YL, Zhou YN, Li XY, Huang J, Wahid F, Zhong C, Chu LQ. Continuous production of antibacterial carboxymethyl chitosan-zinc supramolecular hydrogel fiber using a double-syringe injection device. Int J Biol Macromol 2020; 156:252-261. [PMID: 32289407 DOI: 10.1016/j.ijbiomac.2020.04.073] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/08/2020] [Accepted: 04/09/2020] [Indexed: 10/24/2022]
Abstract
Large-scale production of an antibacterial hydrogel is of critical importance for its practical application in biomedical field. In this regard, herein we report on the construction of a double-syringe injection device by using all the commercial parts and its use for continuous production of carboxymethyl chitosan-zinc (CMCh-Zn) supramolecular hydrogel fiber. The resultant CMCh-Zn hydrogel fibers exhibit good stretchability and knittability. The Zn loading into the hydrogel fibers can be easily controlled by adjusting the concentration of Zn2+ solution. Scanning electron microscope measurements indicate that the CMCh-Zn hydrogel fibers have a relatively smooth and thin skin layer, as well as, a 3-dimensional interconnected microporous interior architecture. Antibacterial activities of the CMCh-Zn hydrogel fibers against both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli are also investigated. The results show that the intrinsic blue fluorescence of the as-prepared CMCh-Zn hydrogel fibers can be employed as optical indicator of their antibacterial effectiveness.
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Affiliation(s)
- Yu-Long Wang
- College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin University of Science & Technology, No.29, 13th Avenue, TEDA, Tianjin 300457, China
| | - Ya-Ning Zhou
- College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin University of Science & Technology, No.29, 13th Avenue, TEDA, Tianjin 300457, China
| | - Xin-Yu Li
- College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin University of Science & Technology, No.29, 13th Avenue, TEDA, Tianjin 300457, China
| | - Ju Huang
- College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin University of Science & Technology, No.29, 13th Avenue, TEDA, Tianjin 300457, China
| | - Fazli Wahid
- Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education), Tianjin University of Science & Technology, No.29, 13th Avenue, TEDA, Tianjin 300457, China
| | - Cheng Zhong
- Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education), Tianjin University of Science & Technology, No.29, 13th Avenue, TEDA, Tianjin 300457, China
| | - Li-Qiang Chu
- College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin University of Science & Technology, No.29, 13th Avenue, TEDA, Tianjin 300457, China.
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Soliman OY, Alameh MG, De Cresenzo G, Buschmann MD, Lavertu M. Efficiency of Chitosan/Hyaluronan-Based mRNA Delivery Systems In Vitro: Influence of Composition and Structure. J Pharm Sci 2019; 109:1581-1593. [PMID: 31891675 DOI: 10.1016/j.xphs.2019.12.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/22/2019] [Accepted: 12/23/2019] [Indexed: 12/25/2022]
Abstract
Messenger RNA (mRNA)-containing nanoparticles were produced by electrostatic complexation with a library of pharmaceutical grade chitosans with different degrees of deacetylation and hyaluronic acids (HAs) (native vs. sulfated). Polymer length (Mn), HA degree of sulfation (DS), and amine to phosphate to carboxyl + sulfate (from HA) ratio (N:P:C) were controlled. In vitro transfections were performed in the presence/absence of trehalose and at different pH. Particle size and ζ-potential were correlated with transfection efficiency. Polymer length and charge densities (degree of deacetylation, degree of sulfation) of both HA and chitosan had a direct influence on transfection efficiency through modulation of avidity to mRNA. N:P:C ratio, trehalose, mixing concentration, and nucleic acid dose influenced transfection efficiency with optimized formulations reaching ∼60%-65% transfection efficiency relative to commercially available lipid control with no apparent toxicity for transfection at slightly acidic pH 6.5.
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Affiliation(s)
| | - Mohamad Gabriel Alameh
- Infectious Disease Division, Department of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Gregory De Cresenzo
- Institute of Biomedical Engineering, Polytechnique Montréal, Montreal, Quebec, Canada; Department of Chemical Engineering, Polytechnique Montréal, Montreal, Quebec, Canada
| | - Michael D Buschmann
- Department of Bioengineering, Volgenau School of Engineering, George Mason University, Fairfax, Virginia 22030
| | - Marc Lavertu
- Institute of Biomedical Engineering, Polytechnique Montréal, Montreal, Quebec, Canada; Department of Chemical Engineering, Polytechnique Montréal, Montreal, Quebec, Canada.
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Martins GO, Segalla Petrônio M, Furuyama Lima AM, Martinez Junior AM, de Oliveira Tiera VA, de Freitas Calmon M, Leite Vilamaior PS, Han SW, Tiera MJ. Amphipathic chitosans improve the physicochemical properties of siRNA-chitosan nanoparticles at physiological conditions. Carbohydr Polym 2019; 216:332-342. [DOI: 10.1016/j.carbpol.2019.03.098] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 03/22/2019] [Accepted: 03/26/2019] [Indexed: 12/22/2022]
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Soorbaghi FP, Isanejad M, Salatin S, Ghorbani M, Jafari S, Derakhshankhah H. Bioaerogels: Synthesis approaches, cellular uptake, and the biomedical applications. Biomed Pharmacother 2019; 111:964-975. [PMID: 30841476 DOI: 10.1016/j.biopha.2019.01.014] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 01/01/2019] [Accepted: 01/05/2019] [Indexed: 12/15/2022] Open
Abstract
Aerogels are a class of porous structures with promising physicochemical properties. Among aerogels with various origins, polysaccharide aerogels (e.g., cellulose, chitosan, alginate, starch, agar, and so on) have received more attention. This group of aerogels can be classified as bioaerogels, which are originated from natural, semi-synthetic, and synthetic sources with exceptional biomedical applications. This review focuses on bioaerogels from the viewpoints of synthesis approaches, cellular uptake, toxicity, biodegradability, and the biomedical application perspectives.
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Affiliation(s)
- Fatemeh Pashaei Soorbaghi
- Polymer Engineering Department, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran; Andishehpardazan Avin Co., Tehran, Iran
| | | | - Sara Salatin
- Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz, Iran; Student Research Committee, Tabriz University of Medical Science, Tabriz, Iran
| | - Milad Ghorbani
- Department of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Samira Jafari
- Pharmaceutical Sciences Research Center, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Hossein Derakhshankhah
- Pharmaceutical Sciences Research Center, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Shi Q, Rondon-Cavanzo EP, Dalla Picola IP, Tiera MJ, Zhang X, Dai K, Benabdoune HA, Benderdour M, Fernandes JC. In vivo therapeutic efficacy of TNFα silencing by folate-PEG-chitosan-DEAE/siRNA nanoparticles in arthritic mice. Int J Nanomedicine 2018; 13:387-402. [PMID: 29391796 PMCID: PMC5769564 DOI: 10.2147/ijn.s146942] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Tumor necrosis factor-alpha (TNFα), a pro-inflammatory cytokine, has been shown to play a role in the pathophysiology of rheumatoid arthritis. Silencing TNFα expression with small interfering RNA (siRNA) is a promising approach to treatment of the condition. METHODS Towards this end, our team has developed a modified chitosan (CH) nanocarrier, deploying folic acid, diethylethylamine (DEAE) and polyethylene glycol (PEG) (folate-PEG-CH-DEAE15). The gene carrier protects siRNA against nuclease destruction, its ligands facilitate siRNA uptake via cell surface receptors, and it provides improved solubility at neutral pH with transport of its load into target cells. In the present study, nanoparticles were prepared with siRNA-TNFα, DEAE, and folic acid-CH derivative. Nanoparticle size and zeta potential were verified by dynamic light scattering. Their TNFα-knockdown effects were tested in a murine collagen antibody-induced arthritis model. TNFα expression was examined along with measurements of various cartilage and bone turnover markers by performing histology and microcomputed tomography analysis. RESULTS We demonstrated that folate-PEG-CH-DEAE15/siRNA nanoparticles did not alter cell viability, and significantly decreased inflammation, as demonstrated by improved clinical scores and lower TNFα protein concentrations in target tissues. This siRNA nanocarrier also decreased articular cartilage destruction and bone loss. CONCLUSION The results indicate that folate-PEG-CH-DEAE15 nanoparticles are a safe and effective platform for nonviral gene delivery of siRNA, and their potential clinical applications warrant further investigation.
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Affiliation(s)
- Qin Shi
- Orthopedic Research Laboratory, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Montréal, QC, Canada
| | - Elsa-Patricia Rondon-Cavanzo
- Orthopedic Research Laboratory, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Montréal, QC, Canada
| | - Isadora Pfeifer Dalla Picola
- Orthopedic Research Laboratory, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Montréal, QC, Canada
- Department of Chemistry and Environmental Sciences, UNESP-São Paulo State University, São José do Rio Preto, Brazil
| | - Marcio José Tiera
- Department of Chemistry and Environmental Sciences, UNESP-São Paulo State University, São José do Rio Preto, Brazil
| | - Xiaoling Zhang
- Orthopedic Cellular and Molecular Biology Laboratories, Institute of Health Sciences, Chinese Academy of Sciences and Shanghai Jiao Tong University School of Medicine, Shanghai
| | - Kerong Dai
- Department of Orthopedics, Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Houda Abir Benabdoune
- Orthopedic Research Laboratory, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Montréal, QC, Canada
| | - Mohamed Benderdour
- Orthopedic Research Laboratory, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Montréal, QC, Canada
| | - Julio Cesar Fernandes
- Orthopedic Research Laboratory, Hôpital du Sacré-Coeur de Montréal, Université de Montréal, Montréal, QC, Canada
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Alameh M, Lavertu M, Tran-Khanh N, Chang CY, Lesage F, Bail M, Darras V, Chevrier A, Buschmann MD. siRNA Delivery with Chitosan: Influence of Chitosan Molecular Weight, Degree of Deacetylation, and Amine to Phosphate Ratio on in Vitro Silencing Efficiency, Hemocompatibility, Biodistribution, and in Vivo Efficacy. Biomacromolecules 2017; 19:112-131. [PMID: 29211954 DOI: 10.1021/acs.biomac.7b01297] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chitosan (CS) shows in vitro and in vivo efficacy for siRNA delivery but with contradictory findings for incompletely characterized systems. For understanding which parameters produce effective delivery, a library of precisely characterized chitosans was produced at different degrees of deacetylation (DDAs) and average molecular weights (Mn). Encapsulation and transfection efficiencies were characterized in vitro. Formulations were selected to examine the influence of Mn and N:P ratio on nanoparticle uptake, metabolic activity, genotoxicity, and in vitro transfection. Hemocompatibility and in vivo biodistribution were then investigated for different Mn, N:P ratios, and doses. Nanoparticle uptake and gene silencing correlated with increased surface charge, which was obtained at high DDA and high Mn. A minimum polymer length of ∼60-70 monomers (∼10 kDa) was required for stability and knockdown. In vitro knockdown was equivalent to lipid control with no metabolic or genotoxicity. An inhibitory effect of serum on biological performance was dependent on DDA, Mn, and N:P. In vivo biodistribution in mice show accumulation of nanoparticles in kidney with 40-50% functional knockdown.
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Affiliation(s)
- Mohamad Alameh
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Marc Lavertu
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Nicolas Tran-Khanh
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Chi-Yuan Chang
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Frederic Lesage
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Martine Bail
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Vincent Darras
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Anik Chevrier
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
| | - Michael D Buschmann
- Department of Chemical Engineering, ‡Institute of Biomedical Engineering, and §Department of Electrical Engineering, Polytechnique Montreal , Montreal, Quebec H3T 1J4, Canada
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Chen Y, Sun L, Guo D, Wu Z, Chen W. Co-delivery of hypoxia inducible factor-1α small interfering RNA and 5-fluorouracil to overcome drug resistance in gastric cancer SGC-7901 cells. J Gene Med 2017; 19. [PMID: 29106062 DOI: 10.1002/jgm.2998] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 10/21/2017] [Accepted: 10/22/2017] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Drug resistance cancer cells have become a major problem in chemotherapy. To solve this problem, the co-delivery of small interefering RNA (siRNA) and 5-fluorouracil chitosan nanoparticles was employed, aiming to reverse the multidrug resistance of gastric cancer SGC-7901 cells in vitro. METHODS Chitosan nanoparticles were prepared using an ionic gel method. siRNA nanoparticles were characterized by gel retardation assays. Particle size and zeta potential were measured to confirm nanoparticle formation. The transfection efficiency of siRNA was determined by flow cytometry and high-content screening. Western blotting and a quantitative real-time-polymerase chain reaction were used to assess the silencing efficiency of siRNA. Accumulation and efflux experiments for rhodamine-123, cell migration experiments, cell sensitivity analyses and cell apoptosis assays were used to determine whether siRNA could reverse multidrug resistance. A systemic toxicity assay was used to evaluate the safety of nanoparticles. RESULTS Compared to naked siRNA, the co-delivery system demonstrated a higher transfection efficiency and gene silencing efficiency by inhibiting the efflux of P-glycoprotein and cell migration. Moreover, the combination treatment with siRNA and 5-fluorouracil co-delivered by chitosan nanoparticles can increase the sensitivity of drug resistance cells and cell apoptosis. Finally, the safety of nanoparticles was evaluated in vivo and the results obtained suggested that nanoparticles did not have any obvious toxicity. CONCLUSIONS Co-delivery of siRNA and 5-fluorouracil chitosan nanoparticles is an attractive strategy for overcoming multidrug resistance.
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Affiliation(s)
- Yunna Chen
- The College of Pharmacy, Anhui University of Chinese Medicine, Hefei, China.,Anhui Academy of Chinese Medicine, Anhui Hefei, China.,Institute of Drug Metabolism, Anhui University of Chinese Medicine, Hefei, China
| | - Li Sun
- The College of Pharmacy, Anhui University of Chinese Medicine, Hefei, China
| | - Dongdong Guo
- The College of Pharmacy, Anhui University of Chinese Medicine, Hefei, China.,Anhui Academy of Chinese Medicine, Anhui Hefei, China.,Institute of Drug Metabolism, Anhui University of Chinese Medicine, Hefei, China
| | - Ziteng Wu
- The College of Pharmacy, Anhui University of Chinese Medicine, Hefei, China.,Anhui Academy of Chinese Medicine, Anhui Hefei, China.,Institute of Drug Metabolism, Anhui University of Chinese Medicine, Hefei, China
| | - Weidong Chen
- The College of Pharmacy, Anhui University of Chinese Medicine, Hefei, China.,Anhui Academy of Chinese Medicine, Anhui Hefei, China.,Institute of Drug Metabolism, Anhui University of Chinese Medicine, Hefei, China
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