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Yin T, Liu Y, Yang M, Wang L, Zhou J, Huo M. Novel Chitosan Derivatives with Reversible Cationization and Hydrophobicization for Tumor Cytoplasm-Specific Burst Co-delivery of siRNA and Chemotherapeutics. ACS APPLIED MATERIALS & INTERFACES 2020; 12:14770-14783. [PMID: 32149497 DOI: 10.1021/acsami.9b19373] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Despite the great potential of combination therapy based on siRNA and chemotherapeutics, an efficient vehicle with abilities of well drug co-loading, synchronizing in vivo trafficking, and target-specific co-burst release remains elusive, which results in a suboptimal synergistic potency. Herein, a novel chitosan amphiphile (PEI-ss-HECS-ss-OA, HSPO) with glutathione (GSH)-reversible cationization and hydrophobicization by polyethylenimine (PEI) and octylamine (OA), respectively, was developed for this purpose. HSPO spontaneously assembled in aqueous solution to be a micellar system and effectively co-encapsulated the two drugs with an adjustable dosage ratio. With a surface charge inversion strategy by hyaluronic acid (HA) coating, the HA(HSPO) co-delivery micelles with a negative surface charge (-21.45 ± 1.44 mV) and suitable size (192.52 ± 7.41 nm) selectively accumulated into CD44 overexpressed A549 tumors through a combination of passive and active targeting mechanism. Then, tumor cytoplasm-selective co-burst release was obtained through GSH triggered collapse of the amphiphilic assembly alongside a decrease of positive charge condensation, finally leading to an enhanced synergistic antitumor effect with a superior inhibition ratio of 86.63%. Overall, this study validated the great promise of HSPO as an efficient site-specific rapid co-trafficking vehicle of siRNA and chemotherapeutics for a remarkable synergistic tumor inhibition.
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Affiliation(s)
- Tingjie Yin
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Yanqi Liu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Mengnan Yang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Lei Wang
- Department of Pharmaceutics, Guizhou Medical University, Huaxi university town, Guian new district 550025 Guizhou, People's Republic of China
| | - Jianping Zhou
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
| | - Meirong Huo
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China
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Yu B, Meng Q, Hu H, Xu T, Shen Y, Cong H. Construction of Dimeric Drug-Loaded Polymeric Micelles with High Loading Efficiency for Cancer Therapy. Int J Mol Sci 2019; 20:E1961. [PMID: 31013608 PMCID: PMC6515377 DOI: 10.3390/ijms20081961] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 11/20/2022] Open
Abstract
Polymeric micelles (PMs) have been applied widely to transport hydrophobic drugs to tumor sites for cancer treatment. However, the low load efficiency of the drug in the PMs significantly reduces the therapeutic efficiency. We report here that disulfide-linked camptothecin (CPT) as a kind of dimeric drug can be effectively embedded in the core of poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone) (PCL-PEG-PCL) PMs for improving drug-loading efficiency, and PEG can be used as a hydrophilic shell. Moreover, the dimeric CPT-loaded PCL-PEG-PCL PMs exhibited excellent solubility in phosphate-buffered saline (PBS) media and significant cytotoxicity to cancer cells.
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Affiliation(s)
- Bing Yu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
- Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China.
| | - Qingye Meng
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Hao Hu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Tao Xu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
| | - Youqing Shen
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Center for Bionanoengineering, and Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
| | - Hailin Cong
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.
- Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China.
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3
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Chitosan-based nanoparticles: An overview of biomedical applications and its preparation. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2018.10.022] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yu B, Song N, Hu H, Chen G, Shen Y, Cong H. A degradable triple temperature-, pH-, and redox-responsive drug system for cancer chemotherapy. J Biomed Mater Res A 2018; 106:3203-3210. [DOI: 10.1002/jbm.a.36515] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 07/07/2018] [Accepted: 07/25/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Bing Yu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering; Qingdao University; Qingdao 266071 China
- Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory; Qingdao University; Qingdao 266071 China
| | - Na Song
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering; Qingdao University; Qingdao 266071 China
| | - Hao Hu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering; Qingdao University; Qingdao 266071 China
| | - Guihuan Chen
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering; Qingdao University; Qingdao 266071 China
| | - Youqing Shen
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering; Qingdao University; Qingdao 266071 China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Center for Bionanoengineering, and Department of Chemical and Biological Engineering; Zhejiang University; Hangzhou 310027 China
| | - Hailin Cong
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering; Qingdao University; Qingdao 266071 China
- Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory; Qingdao University; Qingdao 266071 China
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Yao W, Fu S, Yang G, Wang J, Wang X, Tang R. Low molecular weight PEI-grafted carboxyl-modified soybean protein as gene carriers with reduced cytotoxicity and greatly improved transfection in vitro. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1482462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Weijing Yao
- Engineering Research Center for Biomedical Materials, School of Life Science, Anhui Key Laboratory of Modern Biomanufacturing Anhui University, Hefei, Anhui Province, P. R. China
| | - Shengxiang Fu
- Engineering Research Center for Biomedical Materials, School of Life Science, Anhui Key Laboratory of Modern Biomanufacturing Anhui University, Hefei, Anhui Province, P. R. China
| | - Guanqing Yang
- Engineering Research Center for Biomedical Materials, School of Life Science, Anhui Key Laboratory of Modern Biomanufacturing Anhui University, Hefei, Anhui Province, P. R. China
| | - Jun Wang
- Engineering Research Center for Biomedical Materials, School of Life Science, Anhui Key Laboratory of Modern Biomanufacturing Anhui University, Hefei, Anhui Province, P. R. China
| | - Xin Wang
- Engineering Research Center for Biomedical Materials, School of Life Science, Anhui Key Laboratory of Modern Biomanufacturing Anhui University, Hefei, Anhui Province, P. R. China
| | - Rupei Tang
- Engineering Research Center for Biomedical Materials, School of Life Science, Anhui Key Laboratory of Modern Biomanufacturing Anhui University, Hefei, Anhui Province, P. R. China
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Yao W, Cheng X, Fu S, Yan G, Wang X, Tang R. Low molecular weight polyethylenimine-grafted soybean protein gene carriers with low cytotoxicity and greatly improved transfection in vitro. J Biomater Appl 2018; 32:957-966. [PMID: 29262753 DOI: 10.1177/0885328217748021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
A series of gene carriers (SP-PEI) have been synthesized by acylation reaction between soybean protein and branched polyethylenimine with low molecular weight of 600, 1200 and 1800 Da, and designed as SP-PEI600, SP-PEI1200 and SP-PEI1800, respectively. SP-PEI could effectively condense plasmid DNA into nanoscale polyplexes with size range of 100-200 nm, and exhibited much lower cytotoxicity against 293T and SH-SY5Y cells than that of branched polyethylenimine (25 kDa). In vitro gene transfection demonstrated that SP-PEI/DNA complex displayed increased transfection against 293T and SH-SY5Y cells with the increase of the weight ratio of SP-PEI/DNA complex with or without 10% serum. At weight ratio of 24, SP-PEI1800/DNA polyplexes showed the highest transfection on SH-SY5Y cells, which was almost three folds higher than PEI (25 kDa). Furthermore, these SP-PEIs/DNA polyplexes could effectively transfect 293T and SH-SY5Y cells with or without 10% serum, suggesting their excellent serum tolerance.
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Affiliation(s)
- Weijing Yao
- School of Life Science, Anhui University, Hefei, China
| | - Xu Cheng
- School of Life Science, Anhui University, Hefei, China
| | - Shengxiang Fu
- School of Life Science, Anhui University, Hefei, China
| | - Guoqing Yan
- School of Life Science, Anhui University, Hefei, China
| | - Xin Wang
- School of Life Science, Anhui University, Hefei, China
| | - Rupei Tang
- School of Life Science, Anhui University, Hefei, China
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Microwave Assisted Preparation of Antimicrobial Chitosan with Guanidine Oligomers and Its Application in Hygiene Paper Products. Polymers (Basel) 2017. [DOI: 10.3390/polym9110633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Microwave Assisted Preparation of Antimicrobial Chitosan with Guanidine Oligomers and Its Application in Hygiene Paper Products. Polymers (Basel) 2017; 9:polym9120633. [PMID: 30965941 PMCID: PMC6418732 DOI: 10.3390/polym9120633] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 11/09/2017] [Accepted: 11/13/2017] [Indexed: 11/25/2022] Open
Abstract
Guanidinylated chitosan (GCS) was prepared by grafting guanidine oligomers onto chitosan under microwave irradiation. The structure of GCS characterized by FT-IR and 1H NMR verified the covalent bonding between the guanidine oligomers and chitosan; the effects of molar ratio, reaction temperature, and time were investigated and the degree of substitution of GCS reached a maximum of 25.5% under optimized conditions in this work. The resulting GCS showed significantly enhanced antimicrobial activities. The results obtained from the dynamic UV absorption of Escherichia coli (E. coli) and atomic force microscopy (AFM) revealed that the deactivation of E. coli by GCS was due to the destructing of the cell membrane and the prompt release of cytoplasm from the bacterial cells. The adsorption of GCS onto cellulose fibers and the antimicrobial efficiency of the hygiene papers with GCS were also investigated. Microwave irradiation as a green assisted method was applied to promote this reaction. This facile approach allowed chitosan to be guanidinylated without tedious preparation procedures and thus broadened its application as a biocompatible antimicrobial agent.
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Lin CW, Lu KY, Wang SY, Sung HW, Mi FL. CD44-specific nanoparticles for redox-triggered reactive oxygen species production and doxorubicin release. Acta Biomater 2016; 35:280-92. [PMID: 26853764 DOI: 10.1016/j.actbio.2016.02.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/10/2016] [Accepted: 02/03/2016] [Indexed: 02/04/2023]
Abstract
CD44-specific and redox-responsive nanoparticles were prepared by coating a bioreducible chitosan-based nanoparticles with hyaluronic acid for intracellular glutathione-triggered reactive oxygen species (ROS) production and doxorubicin (DOX) release. Chitosan (CS) was conjugated with a copper chelator, D-penicillamine (D-pen), to obtain a CS-SS-D-pen conjugate through the formation of a disulfide bond. D-pen release from the conjugate was triggered by intracellular glutathione (GSH) via reducing biologically reversible disulfide bonds. Self-assembled CS-SS-D-pen nanoparticles were prepared through ionotropic gelation with tripolyphosphate and subsequently coated with hyaluronic acid (HA). The HA-coated CS-SS-D-pen NPs were reduced by GSH to release free D-pen and trigger ROS production via a series of reactions involving Cu(II)-catalyzed D-pen oxidation and H2O2 generation. DOX was loaded into the HA-coated CS-SS-D-pen NPs by a method involving the complexation of DOX with Cu(II) ions. The Cu(II)-DOX complex-loaded NPs exhibited redox-responsive release properties which accelerated DOX release at a higher glutathione level (10mM). Confocal fluorescence microscopy demonstrated that the Cu(II)-DOX-loaded NPs effectively delivered DOX to human colon adenocarcinoma cells (HT-29) by active targeting via HA-CD44 interactions. Intracellular ROS generated from the HA-coated CS-SS-D-pen NPs sensitized cancer cells to DOX-induced cytotoxicity. In vitro cytotoxicity assays revealed that Cu(II)-DOX-loaded NPs sensitized cells to DOX-induced cytotoxicity in CD44-overexpressing HT-29 cells compared to CD44 low-expressing HCT-15 cells. STATEMENT OF SIGNIFICANCE In this manuscript, we develop a CD44-targetable loaded with nanoparticles Cu(II)-DOX complex. The nanoparticles exhibited redox-responsive properties, which triggered reactive oxygen species (ROS) production and accelerated DOX release. The Cu(II)-DOX-loaded nanoparticle sensitized cells to DOX-induced cytotoxicity in CD44-overexpressing HT-29 cells. To our knowledge, this is the first report showing the combination of CD44-targeting and redox-responsive property for triggering ROS production and subsequent drug release. We believe our findings would appeal to the readership of Acta Biomaterialia because the study bring new and interesting ideals in the development of specific and stimuli-responsive nanoparticles as drug carrier for cancer therapy.
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Affiliation(s)
- Cheng-Wei Lin
- Department of Biochemistry and Molecular Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan; Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Kun-Ying Lu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Sin-Yu Wang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Hsing-Wen Sung
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Fwu-Long Mi
- Department of Biochemistry and Molecular Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan; Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan; Graduate Institute of Nanomedicine and Medical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
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Mokhtarzadeh A, Alibakhshi A, Yaghoobi H, Hashemi M, Hejazi M, Ramezani M. Recent advances on biocompatible and biodegradable nanoparticles as gene carriers. Expert Opin Biol Ther 2016; 16:771-85. [DOI: 10.1517/14712598.2016.1169269] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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11
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Preparation and properties of pH-responsive, self-assembled colloidal nanoparticles from guanidine-containing polypeptide and chitosan for antibiotic delivery. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.01.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Wen C, Hu Y, Xu C, Xu FJ. Reducible polyrotaxane-based pseudo-comb polycations via consecutive ATRP processes for gene delivery. Acta Biomater 2016; 32:110-119. [PMID: 26712599 DOI: 10.1016/j.actbio.2015.12.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 11/25/2015] [Accepted: 12/18/2015] [Indexed: 02/05/2023]
Abstract
Supramolecular cyclodextrin polyrotaxane (PR) has attracted much attention due to their unique flexible properties. In this work, the reducible PR-based cationic block copolymer (SS-PR) was prepared via ATRP of DMAEMA based on the self-assembled pseudo-PR. A series of pseudo-comb polycations (SS-PR-pDM) with different molecular weights were subsequently produced via two-step ATRP of DMAEMA by using bromoisobutylryl-functionalized SS-PR as the macroinitiator. Incorporation of disulfide linkages in the backbone of PR permits the SS-PR and pseudo-comb SS-PR-pDM to be readily disassembled upon reductive stimuli. SS-PR-pDM exhibited the enhanced pDNA-condensing ability and similarly low toxicity compared with SS-PR. Meanwhile, SS-PR-pDM displayed higher cell internalization rates (88% for SS-PR-pDM3 vs. 77% for SS-PR) and luciferase gene transfection efficiency. The percentages of the EGFP-positive HeLa cells mediated by SS-PR-pDM3 and SS-PR were 44% and 22%, respectively. Furthermore, the favorable property of the pseudo-comb SS-PR-pDM benefited pDNA entering the nucleus. The present work demonstrates that properly grafting cationic side chains from reducible PR backbones via consecutive ATRP processes was one effective means to produce new PR-based supramolecular polycations. STATEMENT OF SIGNIFICANCE Supramolecular cyclodextrin polyrotaxanes (PR) had been attracted much attention due to their unique flexible properties. In this work, two kinds of bioreducible PR-based polycations were synthesized via consecutive ATRP processes for gene delivery. The bioreducible PR-based cationic block copolymer (SS-PR) was prepared via ATRP of DMAEMA based on the self-assembled pseudopolyrotaxane of α-cyclodextrins (α-CD) with a disulfide-linked bromoisobutylryl-terminated PEG. Then, a series of pseudo-comb polycations (SS-PR-pDM) with different molecular weights were subsequently produced by using SS-PR-Br macroinitiators via step-two ATRP of DMAEMA. Incorporation of disulfide linkages in bromoisobutylryl-terminated PEG permits the SS-PR and pseudo-comb SS-PR-pDM to be readily disassembled upon reductive stimuli, contributing to gene delivery efficiency. SS-PR-pDM displayed higher cell internalization and gene transfection efficiency. In addtion, the favorable property of the pseudo-comb SS-PR-pDM benefited pDNA entering the nucleus. The present work demonstrates that properly grafting pDMAEMA side chains from bioreducible polyrotaxane backbones via consecutive ATPR processes was one effective means to produce new PR-based supramolecular polycations.
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Affiliation(s)
- Chun Wen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yang Hu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chen Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Fu-Jian Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China.
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Li Y, Tian H, Ding J, Lin L, Chen J, Gao S, Chen X. Guanidinated Thiourea-Decorated Polyethylenimines for Enhanced Membrane Penetration and Efficient siRNA Delivery. Adv Healthc Mater 2015; 4:1369-75. [PMID: 25899995 DOI: 10.1002/adhm.201500165] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 03/29/2015] [Indexed: 11/09/2022]
Abstract
RNA interference (RNAi) provides the promising treatments of gene-related diseases while hindered by the lack of highly efficient delivery platform with low cytotoxicity. Moreover, the intracellular fates of nonviral gene carriers are closely related to their internalization pathway, and eventually influence their RNAi efficiency. Herein, a series of guanidinated thiourea-modified polyethylenimines (PEI-MTU-Gs) are synthesized and utilized as the efficient carriers of small interfering RNA (siRNA) with up to 71.6% inhibition of luciferase activity in the luciferase-expressing cell lines (i.e., HeLa/Luc cells). The introduction of noncationic hydrogen bond donors, that is, thiourea groups, provides the carriers with much lower cytotoxicities and relatively looser complex structures that facilitate the intracellular release of siRNAs. Furthermore, the multiguanidino structures endow the PEI-MTU-G/siRNA complexes with the ability to directly penetrate cell membrane, which facilitates the cellular internalization while avoiding them suffering from the rigorous lysosomes. The results demonstrate PEI-MTU35 -Gs as promising siRNA carriers for further gene therapy.
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Affiliation(s)
- Yuce Li
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Huayu Tian
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Lin Lin
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Jie Chen
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
| | - Shiqian Gao
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 P. R. China
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14
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Hu H, Yuan W, Liu FS, Cheng G, Xu FJ, Ma J. Redox-responsive polycation-functionalized cotton cellulose nanocrystals for effective cancer treatment. ACS APPLIED MATERIALS & INTERFACES 2015; 7:8942-51. [PMID: 25845425 DOI: 10.1021/acsami.5b02432] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Carbon nanotubes have excellent penetrability and encapsulation efficiency in the fields of drug and gene delivery. Because of their excellent physicochemical properties, biocompatible rodlike cellulose nanocrystals (CNCs) were reportedly expected to replace carbon nanotubes. In this work, CNCs from natural cotton wool were functionalized with disulfide bond-linked poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes for effective biomedical applications. A range of CNC-graft-PDMAEMA vectors (termed as CNC-SS-PDs) with various molecular weights of PDMAEMA were synthesized. Under reducible conditions, PDMAEMA chains can be easily cleaved from CNCs. The gene condensation ability, reduction sensitivity, cytotoxicity, gene transfection, and in vivo antitumor activities of CNC-SS-PDs were investigated in detail. The CNC-SS-PDs exhibited good transfection efficiencies and low cytotoxicities. The needlelike shape of CNCs had an important effect on enhancing transfection efficiency. The antitumor effect of CNC-SS-PDs was evaluated by a suicide gene/prodrug system (cytosine deaminase/5-fluorocytosine, CD/5-FC) in vitro and in vivo. This research demonstrates that the functionalization of CNCs with redox-responsive polycations is an effective method for developing novel gene delivery systems.
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Affiliation(s)
- Hao Hu
- ‡Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China
- §Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wei Yuan
- ∥State Key Laboratory of Molecular Oncology, Cancer Hospital, Chinese Academy of Medical Sciences, Beijing 100021, China
| | - Fu-Sheng Liu
- ⊥Brain Tumor Research Center, Beijing Neurosurgical Institute, Beijing Tiantan Hospital affiliated with Capital Medical University, Beijing 100050, China
| | - Gang Cheng
- #Department of Chemical and Biomolecular Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Fu-Jian Xu
- ‡Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing 100029, China
- §Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jie Ma
- ∥State Key Laboratory of Molecular Oncology, Cancer Hospital, Chinese Academy of Medical Sciences, Beijing 100021, China
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15
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Zhang X, Duan Y, Wang D, Bian F. Preparation of arginine modified PEI-conjugated chitosan copolymer for DNA delivery. Carbohydr Polym 2015; 122:53-9. [PMID: 25817642 DOI: 10.1016/j.carbpol.2014.12.054] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 12/18/2014] [Accepted: 12/20/2014] [Indexed: 10/24/2022]
Abstract
Polyethylenimine-conjugated chitosan (CS-PEI) and arginine modified polyethylenimine-conjugated chitosan (CS-PEI-Arg) were prepared, and the copolymers were characterized by FTIR, (1)H NMR, and XRD. The properties of these copolymers like plasmid DNA (pDNA) binding capacity, complexes' size and zeta potential, cytotoxicity and transfection efficiency were also evaluated. The results show that CS-PEI-Arg derivatives can bind pDNA thoroughly, and form complexes with sizes about 170 nm. Cytotoxicity assay in HepG2 and 293T cells show that CS-PEI-Arg has lower cytotoxicity compared with CS-PEI, which is similar to CS and far below that of PEI. In vitro luciferase assay show that CS-PEI-Arg has better transfection efficiency than CS-PEI, which is superior to that of PEI. The best transfection efficiency of CS-PEI-Arg (N/P = 50) is 2.3-fold, 4.2-fold of those of CS-PEI (N/P = 20) and PEI's (N/P = 10) efficiency respectively. These results display that CS-PEI-Arg is a promising candidate as an efficient gene vector.
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Affiliation(s)
- Xi Zhang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yajing Duan
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Dongfang Wang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Fengling Bian
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
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16
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Liao ZX, Peng SF, Chiu YL, Hsiao CW, Liu HY, Lim WH, Lu HM, Sung HW. Enhancement of efficiency of chitosan-based complexes for gene transfection with poly(γ-glutamic acid) by augmenting their cellular uptake and intracellular unpackage. J Control Release 2014; 193:304-15. [DOI: 10.1016/j.jconrel.2014.04.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 04/02/2014] [Accepted: 04/10/2014] [Indexed: 12/01/2022]
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17
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Lu KY, Lin CW, Hsu CH, Ho YC, Chuang EY, Sung HW, Mi FL. FRET-based dual-emission and pH-responsive nanocarriers for enhanced delivery of protein across intestinal epithelial cell barrier. ACS APPLIED MATERIALS & INTERFACES 2014; 6:18275-18289. [PMID: 25260022 DOI: 10.1021/am505441p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The oral route is a convenient and commonly employed way for drug delivery. However, therapeutic proteins have poor bioavailability upon oral administration due to the impermeable barrier from intestinal epithelial tight junction (TJ). Moreover, the pH of the small intestine varies among different regions of the intestinal tract where digestion and absorption occur at different levels. In this study, a tunable dual-emitting and pH-responsive nanocarrier that can alter the fluorescent color and emission intensity in response to pH changes and can trigger the opening of intestinal epithelial TJ at different levels were developed from chitosan-N-arginine and poly(γ-glutamic acid)-taurine conjugates. As pH increased from 6.0 to 8.0, the binding affinity of the oppositely charged polyions decreased, whereas the ratio of the intensity of the donor-to-acceptor emission intensity (ID/IA) increased by 27-fold. The fluorescent and pH-responsive nanocarrier was able to monitor the pH change of intestinal environment and to control the release of an anti-angiogenic protein in response to the pH gradient. The nanocarrier triggered the opening of intestinal epithelial TJ and consequently enhanced the permeation of the released protein through the intestinal epithelial barrier model (Caco-2 cell monolayer) to inhibit tube formation of human umbilical vein endothelial cells.
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Affiliation(s)
- Kun-Ying Lu
- Institute of Organic and Polymeric Materials, National Taipei University of Technology , Taipei 10608, Taiwan, ROC
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18
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Shi B, Zhang H, Bi J, Dai S. Endosomal pH responsive polymers for efficient cancer targeted gene therapy. Colloids Surf B Biointerfaces 2014; 119:55-65. [PMID: 24880229 DOI: 10.1016/j.colsurfb.2014.04.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 03/20/2014] [Accepted: 04/13/2014] [Indexed: 02/08/2023]
Abstract
Treatment of human diseases at gene level is always limited by effective gene delivery vectors. In this study, we designed and developed an endosomal pH sensitive targeted gene delivery system, folic acid functionalized Schiff-base linked imidazole chitosan (FA-SLICS), for cancer therapy. The FA-SLICS is able to self-assemble plasmid DNA (pDNA) into nano-scaled polyplexes under a neutral condition and to release the loaded pDNA in the endosomal microenvironment due to the presence of pH sensitive Schiff-base moieties along chitosan backbones. The FA-SLICS has negligible cytotoxicity to normal cells (CHO), but displays slight toxicity to cancer cells (HeLa and HepG2). In addition, FA-SLICS can selectively and efficiently transfect FR (folate receptor) positive cells (HeLa cells) as a gene carrier. Therefore, the FA-SLICS should be a promising delivery vector in cancer gene therapy based on its cell targeting capability and intracellular microenvironment controlled delivery mechanism.
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Affiliation(s)
- Bingyang Shi
- School of Chemical Engineering, The University of Adelaide, Adelaide 5005, SA, Australia
| | - Hu Zhang
- School of Chemical Engineering, The University of Adelaide, Adelaide 5005, SA, Australia
| | - Jingxiu Bi
- School of Chemical Engineering, The University of Adelaide, Adelaide 5005, SA, Australia.
| | - Sheng Dai
- School of Chemical Engineering, The University of Adelaide, Adelaide 5005, SA, Australia.
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19
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Francesko A, Fernandes MM, Perelshtein I, Benisvy-Aharonovich E, Gedanken A, Tzanov T. One-step sonochemical preparation of redox-responsive nanocapsules for glutathione mediated RNA release. J Mater Chem B 2014; 2:6020-6029. [DOI: 10.1039/c4tb00599f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A simple and reproducible sonochemical method is described to achieve redox-responsive nanocapsules based on intracellular glutathione levels for enhanced and sustained RNA delivery.
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Affiliation(s)
- Antonio Francesko
- Grup de Biotecnologia Molecular i Industrial
- Department of Chemical Engineering
- Universitat Polìtecnica de Catalunya
- , Spain
| | - Margarida M. Fernandes
- Grup de Biotecnologia Molecular i Industrial
- Department of Chemical Engineering
- Universitat Polìtecnica de Catalunya
- , Spain
| | - Ilana Perelshtein
- Department of Chemistry
- Institute of Nanotechnology and Advanced Materials
- Bar-Ilan University
- Israel
| | | | - Aharon Gedanken
- Department of Chemistry
- Institute of Nanotechnology and Advanced Materials
- Bar-Ilan University
- Israel
| | - Tzanko Tzanov
- Grup de Biotecnologia Molecular i Industrial
- Department of Chemical Engineering
- Universitat Polìtecnica de Catalunya
- , Spain
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20
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Liu Q, Wang C, Cao Y, Xu X, Zhang L. A novel gene carrier prepared from triple helical β-glucan and polydeoxyadenylic acid. J Mater Chem B 2014; 2:933-944. [DOI: 10.1039/c3tb21195a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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21
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Reduction biodegradable brushed PDMAEMA derivatives synthesized by atom transfer radical polymerization and click chemistry for gene delivery. Acta Biomater 2013; 9:7758-66. [PMID: 23660547 DOI: 10.1016/j.actbio.2013.04.046] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 04/01/2013] [Accepted: 04/24/2013] [Indexed: 01/08/2023]
Abstract
Novel reducible and degradable brushed poly(2-(dimethylamino) ethyl methacrylate) (PDMAEMA) derivatives were synthesized and evaluated as non-viral gene delivery vectors. First, alkyne-functionalized poly(aspartic acid) with a disulfide linker between the propargyl group and backbone poly([(propargyl carbamate)-cystamine]-α,β-aspartamide) (P(Asp-SS-AL)) was synthesized. Second, linear low molecular weight (LMW) monoazido-functionalized PDMAEMAs synthesized via atom transfer radical polymerization were conjugated to the polypeptide side-chains of P(Asp-SS-AL) via click chemistry to yield high molecular weight (HMW) polyaspartamide-based disulfide-containing brushed PDMAEMAs (PAPDEs). The PAPDEs were able to condense plasmid DNA to form 100 to 200nm polyplexes with positive ζ-potentials. Moreover, in the presence of dithiothreitol the PAPDEs degraded into LMW PDAMEMA, resulting in disintegration of the PAPDE/DNA polyplexes and subsequent release of plasmid DNA. In vitro experiments revealed that the PAPDEs were less cytotoxic and more effective in gene transfection than control 25kDa poly(ethyleneimine) and HMW linear PDMAEMA. In conclusion, reducible and degradable polycations composed of LMW PDMAEMAs coupled to a polypeptide backbone via reduction-sensitive disulfide bonds are effective gene vectors with an excellent cytocompatibility.
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22
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Gaspar VM, Marques JG, Sousa F, Louro RO, Queiroz JA, Correia IJ. Biofunctionalized nanoparticles with pH-responsive and cell penetrating blocks for gene delivery. NANOTECHNOLOGY 2013; 24:275101. [PMID: 23759860 DOI: 10.1088/0957-4484/24/27/275101] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Bridging the gap between nanoparticulate delivery systems and translational gene therapy is a long sought after requirement in nanomedicine-based applications. However, recent developments regarding nanoparticle functionalization have brought forward the ability to synthesize materials with biofunctional moieties that mimic the evolved features of viral particles. Herein we report the versatile conjugation of both cell penetrating arginine and pH-responsive histidine moieties into the chitosan polymeric backbone, to improve the physicochemical characteristics of the native material. Amino acid coupling was confirmed by 2D TOCSY NMR and Fourier transform infrared spectroscopy. The synthesized chitosan-histidine-arginine (CH-H-R) polymer complexed plasmid DNA biopharmaceuticals, and spontaneously assembled into stable 105 nm nanoparticles with spherical morphology and positive surface charge. The functionalized delivery systems were efficiently internalized into the intracellular compartment, and exhibited remarkably higher transfection efficiency than unmodified chitosan without causing any cytotoxic effect. Additional findings regarding intracellular trafficking events reveal their preferential escape from degradative lysosomal pathways and nuclear localization. Overall, this assembly of nanocarriers with bioinspired moieties provides the foundations for the design of efficient and customizable materials for cancer gene therapy.
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Affiliation(s)
- V M Gaspar
- CICS-UBI-Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Covilhã, Portugal
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23
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Chen MC, Mi FL, Liao ZX, Hsiao CW, Sonaje K, Chung MF, Hsu LW, Sung HW. Recent advances in chitosan-based nanoparticles for oral delivery of macromolecules. Adv Drug Deliv Rev 2013; 65:865-79. [PMID: 23159541 DOI: 10.1016/j.addr.2012.10.010] [Citation(s) in RCA: 297] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Revised: 09/24/2012] [Accepted: 10/17/2012] [Indexed: 10/27/2022]
Abstract
Chitosan (CS), a cationic polysaccharide, is widely regarded as a safe and efficient intestinal absorption enhancer of therapeutic macromolecules, owing to its inherent mucoadhesive feature and ability to modulate the integrity of epithelial tight junctions reversibly. By using CS-based nanoparticles, many studies have attempted to protect the loaded macromolecules against acidic denaturation and enzymatic degradation, prolong their intestinal residence time, and increase their absorption by the intestinal epithelium. Derivatives of CS such as quaternized CS, thiolated CS and carboxylated CS have also been examined to further enhance its effectiveness in oral absorption of macromolecular drugs. This review article describes the synthesis of these CS derivatives and their characteristics, as well as their potential transport mechanisms of macromolecular therapeutics across the intestinal biological membrane. Recent advances in using CS and its derivatives as carriers for oral delivery of hydrophilic macromolecules and their effects on drug transport are also reviewed.
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24
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Liao ZX, Hsiao CW, Ho YC, Chen HL, Sung HW. Disulfide bond-conjugated dual PEGylated siRNAs for prolonged multiple gene silencing. Biomaterials 2013; 34:6930-7. [PMID: 23769418 DOI: 10.1016/j.biomaterials.2013.05.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 05/23/2013] [Indexed: 02/06/2023]
Abstract
Many human diseases carry at least two independent gene mutations, further exacerbating clinical disorders. In this work, disulfide bond-conjugated dual PEGylated siRNAs were synthesized, capable of specifically targeting and silencing two genes simultaneously. To achieve efficient delivery, the conjugated siRNAs were formulated with the cationic chitosan together with an anionic polymer, poly(γ-glutamic acid) (γPGA), to form a ternary complex. Experimental results indicate that the incorporated γPGA could significantly enhance their intracellular delivery efficiency, allowing for reduction of the disulfide bond-conjugated PEGylated siRNAs delivered to the PEGylated siRNAs in the reductive cytoplasmic environment. The PEGylated siRNAs could more significantly increase their enzymatic tolerability, effectively silence multiple genes, and prolong the duration of their gene silencing capability than the unmodified siRNAs could. Silencing of different genes simultaneously significantly contributes to the efforts to treat multiple gene disorders, and prolonged duration of gene silencing can reduce the need for frequent administrations.
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Affiliation(s)
- Zi-Xian Liao
- Department of Chemical Engineering and Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
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25
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Bioreducible polypeptide containing cell-penetrating sequence for efficient gene delivery. Pharm Res 2013; 30:1968-78. [PMID: 23604924 DOI: 10.1007/s11095-013-1040-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 03/27/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE To design excellent polypeptide-based gene vectors and determine the gene delivery efficiency. METHODS Polypeptides (designated as xPolyK6, xPolyK6-R81 and xPolyK6-R82), comprising the DNA condensing and buffering peptide HK6H as well as cell penetrating peptide (CPP) R8 were obtained by the oxidative polymerization of CHK6HC and CR8C at different molar ratios in 4 mL phosphate-buffered saline (PBS) containing 30% (v/v) DMSO at room temperature for 96 h. The cytotoxicity of vectors was studied by MTT assay. Moreover, particle size, zeta potential and morphology along with the in vitro transfection efficiency and cellular uptake of vector/plasmid DNA (pDNA) complexes were characterized at various w/w ratios to determine their potential in gene therapy. RESULTS All the vectors presented excellent ability of binding and condensing pDNA, additionally with low cytotoxicity. Simultaneously, transfection efficiency of the vectors appeared apparent dependence on the vector composition. The distinct correlation between the content of CR8C with the transfection efficiency demonstrated the effective improvement in transfection efficacy by the oxidative polymerization. Particularly, xPolyK6-R82 possessed the highest transfection efficiency at a w/w ratio of 50. Furthermore, xPolyK6-R82 also presented the best cellular uptake capability demonstrated by confocal microscopy and flow cytometry. CONCLUSIONS Bioreducible polypeptides incorporating with proper amount of CPP are promising as effective non-viral gene vectors in gene therapy.
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26
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Garg P, Kumar S, Pandey S, Seonwoo H, Choung PH, Koh J, Chung JH. Triphenylamine coupled chitosan with high buffering capacity and low viscosity for enhanced transfection in mammalian cells, in vitro and in vivo. J Mater Chem B 2013; 1:6053-6065. [DOI: 10.1039/c3tb20939c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Yeh PH, Sun JS, Wu HC, Hwang LH, Wang TW. Stimuli-responsive HA-PEI nanoparticles encapsulating endostatin plasmid for stem cell gene therapy. RSC Adv 2013. [DOI: 10.1039/c3ra40880a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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28
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Casettari L, Vllasaliu D, Lam JK, Soliman M, Illum L. Biomedical applications of amino acid-modified chitosans: A review. Biomaterials 2012; 33:7565-83. [DOI: 10.1016/j.biomaterials.2012.06.104] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 06/30/2012] [Indexed: 11/27/2022]
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29
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Sabín J, Vázquez-Vázquez C, Prieto G, Bordi F, Sarmiento F. Double charge inversion in polyethylenimine-decorated liposomes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10534-10542. [PMID: 22712613 DOI: 10.1021/la3019259] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The study of the interaction of a cationic polymer as PEI with phospholipids membranes is of special relevance for gene therapy because the PEI is a potential nonviral vector to transfer DNA in living cells. We used light scattering, zeta potential, and electron transmission microscopy to characterize the interaction between DMPG and DOPC liposomes with PEI as a function of the charge molar ratio, pH, temperature, initial size of the liposomes, and headgroup of the lipids. Unexpectedly, a double charge inversion and two different ranges of PEI-liposome concentrations where an aggregation occurs were found, when the proper pH and initial size of the liposomes were chosen. The interaction is analyzed in terms of the interaction potential proposed by Velegol and Thwar for colloidal particles with a nonuniform surface charge distribution. Results show a remarkable dependence of the stability on pH and the initial size of the liposomes, which explains the low reproducibility of the experiments if no special care is taken in preparing the samples. Comparatively small changes in the pH or in the liposomes size lead to a completely different stability behavior.
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Affiliation(s)
- Juan Sabín
- Biophysics & Interfaces Group, Department of Applied Physics, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
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30
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Tao Y, Han J, Dou H. Brain-targeting gene delivery using a rabies virus glycoprotein peptide modulated hollow liposome: bio-behavioral study. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31675g] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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