1
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Wong CW, Pratiwi FW, Chen P, Mou CY, Hsu SH. Revealing the Phagosomal pH Regulation and Inflammation of Macrophages after Endocytosing Polyurethane Nanoparticles by A Ratiometric pH Nanosensor. Adv Biol (Weinh) 2021; 5:e2000200. [PMID: 33724730 DOI: 10.1002/adbi.202000200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 11/07/2020] [Indexed: 11/12/2022]
Abstract
The effect of the intracellular pH of macrophages after taking up biodegradable polymer nanoparticles (NPs) on immunomodulating functions has not been explored so far. Previous studies have demonstrated that biodegradable polyurethane (PU) NPs exhibit immunosuppressive activity. Yet, the intracellular mechanism is not clearly understood. In this study, a uniquely designed pH nanosensor is employed for tracking the intracellular pH value of macrophages to reveal the intracellular journey of PU NPs and to clarify the intracellular pH effect on the corresponding inflammatory response. First, fluorescent mesoporous silica nanoparticles (FRMSNs) is used to detect the pH change in macrophages after endo/phagocytosis of PU NPs. Second, PU is coated on the external surface of FRMSNs to examine the intracellular trafficking process of PU in the macrophages. The results show that the majority of PU-coated FRMSNs remain to stay at the cytosol-early endosome/phagosome regions. The intracellular pH value and other supporting results show that the immune response of PU NPs may be correlated to their internalization journey. The retardation in the degradation process of the PU NPs may intervene with the lysosome activity and repress the immunostimulatory effect, which contributes to the low immune response of PU NPs.
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Affiliation(s)
- Chui-Wei Wong
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan (R.O.C.)
| | - Feby Wijaya Pratiwi
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan (R.O.C.).,Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (R.O.C.)
| | - Peilin Chen
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan (R.O.C.)
| | - Chung-Yuan Mou
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan (R.O.C.)
| | - Shan-Hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan (R.O.C.).,Research and Development Center for Medical Devices, National Taiwan University, Taipei, 10617, Taiwan (R.O.C.).,Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli, 35053, Taiwan (R.O.C.)
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2
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Novel chitosan based nanoparticles as gene delivery systems to cancerous and noncancerous cells. Int J Pharm 2019; 560:306-314. [PMID: 30797073 DOI: 10.1016/j.ijpharm.2019.02.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/14/2019] [Accepted: 02/08/2019] [Indexed: 11/22/2022]
Abstract
The present study aimed to investigate in vitro DNA transfection efficiency of three novel chitosan derivatives: thiolated trimethyl chitosan (TMC-Cys), methylated 4-N,N dimethyl aminobenzyl N,O carboxymethyl chitosan(MABCC) and thiolated trimethyl aminobenzyl chitosan(MABC-Cys). After polymer synthesis and characterization, nanoparticles were prepared using these polymers and their size, zeta potential and DNA condensing ability were measured. After that, cytotoxicity and transfection efficiency of nanocomplexes were carried out in three different cells. The results showed that all polymers could condense DNA plasmid strongly from N/P 2 and nanocomplexes had eligible sizes and zeta potentials. Moreover, the nanocomplexes had negligible cytotoxicity and MABC-Cys was the most effective vehicle for gene delivery in HEK-293T cells. In the two other cell lines, SKOV-3 and MCF-7, TMC-Cys exhibited the highest transfection efficiency. This study indicated that chemical structure of these novel chitosan derivatives in the interaction with the cell type can lead to successful gene delivery.
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3
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Ma J, Deng H, Zhao F, Deng L, Wang W, Dong A, Zhang J. Liposomes-Camouflaged Redox-Responsive Nanogels to Resolve the Dilemma between Extracellular Stability and Intracellular Drug Release. Macromol Biosci 2018; 18:e1800049. [DOI: 10.1002/mabi.201800049] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 03/29/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Jinfeng Ma
- Department of Polymer Science and Engineering; Key Laboratory of Systems Bioengineering (Ministry of Education); School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Hongzhang Deng
- Department of Polymer Science and Engineering; Key Laboratory of Systems Bioengineering (Ministry of Education); School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Fuli Zhao
- Department of Polymer Science and Engineering; Key Laboratory of Systems Bioengineering (Ministry of Education); School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
| | - Liandong Deng
- Department of Polymer Science and Engineering; Key Laboratory of Systems Bioengineering (Ministry of Education); School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Weiwei Wang
- Institute of Biomedical Engineering; Chinese Academy of Medical Science and Peking Union Medical College; Tianjin 300192 China
| | - Anjie Dong
- Department of Polymer Science and Engineering; Key Laboratory of Systems Bioengineering (Ministry of Education); School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Jianhua Zhang
- Department of Polymer Science and Engineering; Key Laboratory of Systems Bioengineering (Ministry of Education); School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Tianjin Key Laboratory of Membrane Science and Desalination Technology; Tianjin University; Tianjin 300072 China
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4
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Zhu D, Yan H, Zhou Z, Tang J, Liu X, Hartmann R, Parak WJ, Feliu N, Shen Y. Detailed investigation on how the protein corona modulates the physicochemical properties and gene delivery of polyethylenimine (PEI) polyplexes. Biomater Sci 2018; 6:1800-1817. [DOI: 10.1039/c8bm00128f] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Given the various cationic polymers developed as non-viral gene delivery vectors, polyethylenimine (PEI) has been/is frequently used in in vitro transfection.
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Affiliation(s)
- Dingcheng Zhu
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
- Fachbereich Physik
| | - Huijie Yan
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
- Fachbereich Physik
| | - Zhuxian Zhou
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | - Jianbin Tang
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | - Xiangrui Liu
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
| | | | - Wolfgang J. Parak
- Fachbereich Physik
- Philipps Universität Marburg
- Germany
- Fachbereich Physik und Chemie and CHyN
- Universität Hamburg
| | - Neus Feliu
- Fachbereich Physik
- Philipps Universität Marburg
- Germany
- Fachbereich Physik und Chemie and CHyN
- Universität Hamburg
| | - Youqing Shen
- Center for Bionanoengineering and Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- College of Chemical and Biological Engineering
- Zhejiang University
- China
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5
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Cho H, Cho YW, Kang SW, Kwak MK, Huh KM, Bae YH, Kang HC. Tempo-spatial Activation of Sequential Quadruple Stimuli for High Gene Expression of Polymeric Gene Nanocomplexes. Mol Pharm 2017; 14:842-855. [PMID: 28199124 DOI: 10.1021/acs.molpharmaceut.6b01065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The clinical application of intracellular gene delivery via nanosized carriers is hindered by intracellular multistep barriers that limit high levels of gene expression. To solve these issues, four different intracellular or external stimuli that can efficiently activate a gene carrier, a gene, or a photosensitizer (pheophorbide A [PhA]) were assessed in this study. The designed nanosized polymeric gene complexes were composed of PhA-loaded thiol-degradable polycation (PhA@RPC) and cytomegalovirus (CMV) promoter-equipped pDNA. After cellular internalization of the resulting PhA@RPC/pDNA complexes, the complexes escaped endosomal sequestration, owing to the endosomal pH-induced endosomolytic activity of RPC in PhA@RPC. Subsequently, intracellular thiol-mediated polycation degradation triggered the release of PhA and pDNA from the complexes. Late exposure to light (for example, 12 h post-treatment) activated the released PhA and resulted in the production of reactive oxygen species (ROS). Intracellular ROS successively activated NF-κB, which then reactivated the CMV promoter in the pDNA. These sequential, stimuli-responsive chemical and biological reactions resulted in high gene expression. In particular, the time-point of light exposure was very significant to tune efficient gene expression as well as negligible cytotoxicity: early light treatment induced photochemical internalization but high cytotoxicity, whereas late light treatment influenced the reactivation of silent pDNA via PhA-generated ROS and activation of NF-κB. In conclusion, the quadruple triggers, such as pH, thiol, light, and ROS, successively influenced a gene carrier (RPC), a photosensitizer, and a genetic therapeutic, and the tempo-spatial activation of the designed quadruple stimuli-activatable nanosized gene complexes could be potential in gene delivery applications.
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Affiliation(s)
- Hana Cho
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea , 43 Jibong-ro, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | - Young-Woo Cho
- Next-generation Pharmaceutical Research Center, Korea Institute of Toxicology , 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea
| | - Sun-Woong Kang
- Next-generation Pharmaceutical Research Center, Korea Institute of Toxicology , 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea
| | - Mi-Kyoung Kwak
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea , 43 Jibong-ro, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
| | - Kang Moo Huh
- Department of Polymer Science and Engineering, Chungnam National University , 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - You Han Bae
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah , 30 S 2000 E, Rm 2972, Salt Lake City, Utah 84112, United States.,Utah-Inha Drug Delivery Systems (DDS) and Advanced Therapeutics Research Center , 9 Songdomirae-ro, Yeonsu-gu, Incheon 21988, Republic of Korea
| | - Han Chang Kang
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea , 43 Jibong-ro, Bucheon-si, Gyeonggi-do 14662, Republic of Korea
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Wang Y, Zhao R, Wang S, Liu Z, Tang R. In vivo dual-targeted chemotherapy of drug resistant cancer by rationally designed nanocarrier. Biomaterials 2015; 75:71-81. [PMID: 26491996 DOI: 10.1016/j.biomaterials.2015.09.030] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Revised: 09/21/2015] [Accepted: 09/23/2015] [Indexed: 01/06/2023]
Abstract
Multidrug resistance is one of major obstacles to the effective cancer chemotherapy. To address this issue, we developed the effective circumvention of multidrug resistance in cancer cells by a yolk-shell Fe3O4@MgSiO3 nanoplatform with the polymerpoly(ethylene glycol) and folic acid modifications can achieve active targeted delivery of anti-cancer drug by using combined magnetic and ligand targeting. The direct intracellular drug delivery of doxorubicin by nanocarrier was much more effectively than free DOX for multidrug resistant Hep-G2/MDR cancer cells. Besides the excellent biocompatibility, high drug loading efficiency, dual-targeting delivery, and controlled releasing behavior, in vivo experiments demonstrate that this nanocarrier can specifically deliver and concentrate doxorubicin hydrochloride in tumor sites to overcome drug resistance. It follows an alternative strategy for effective chemotherapy against drug resistant cancers by using rationally designed nanomaterial.
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Affiliation(s)
- Yang Wang
- Centre for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, PR China
| | - Ruibo Zhao
- Centre for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, PR China
| | - Shibing Wang
- Clinical Research Centre, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang, 310014, PR China
| | - Zhaoming Liu
- Centre for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, PR China
| | - Ruikang Tang
- Centre for Biomaterials and Biopathways, Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, PR China; Qiushi Academy for Advanced Studies, Zhejiang University, Hanghzou, Zhejiang 310027, China.
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7
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Cho H, Lee YJ, Bae YH, Kang HC. Synthetic polynucleotides as endosomolytic agents and bioenergy sources. J Control Release 2015; 216:30-6. [PMID: 26271546 DOI: 10.1016/j.jconrel.2015.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 06/17/2015] [Accepted: 08/05/2015] [Indexed: 11/28/2022]
Abstract
Nucleotides (NTs), such as adenosine triphosphate (ATP) and guanosine triphosphate (GTP), are signaling and bioenergy molecules to mediate a range of cellular pathways. We recently reported their significant endosomolytic activity. To evaluate whether polymeric NTs keep endosomolytic and bioenergetic functions of NTs in drug delivery and cell survival, NTs were polymerized by a coupling reaction to form polynucleotides (pNTs: pATP and pGTP) with their molecular weights around 500kDa. The cellular toxicity, indicated by IC50, of pNT was as low as that of corresponding monomeric NT. pNTs were degraded by an intracellular enzyme, alkaline phosphatase. Introduction of pNTs in a polycation-gene complex (polyplex) enhanced the extent of gene expression in cancerous, non-cancerous, and stem cells, up to 1500-fold higher than that of pNT-free polyplex. In addition, cells stored in a pATP solution resulted in a significantly higher survival rate (e.g., up to 20% increase) when exposed to low temperatures than pATP-free solution. The presence of pNT in polyplexes prevented the reduction of transfection efficiency induced by a low temperature. The findings in this study suggest that endosomolytic and bioenergetic pNTs serve as a non-toxic gene carrier component and protect cells from a cold shock or energy depletion.
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Affiliation(s)
- Hana Cho
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do 420-743, Republic of Korea
| | - Young Ju Lee
- Gwangju Center, Korean Basic Science Institute, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
| | - You Han Bae
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, 30S 2000 E, Rm 2972, Salt Lake City, UT 84112, USA; Utah-Inha Drug Delivery Systems (DDS) and Advanced Therapeutics Research Center, 7-50 Songdo-dong, Yeonsu-gu, Incheon 406-840, Republic of Korea.
| | - Han Chang Kang
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do 420-743, Republic of Korea.
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8
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Lu S, Morris VB, Labhasetwar V. Codelivery of DNA and siRNA via arginine-rich PEI-based polyplexes. Mol Pharm 2015; 12:621-9. [PMID: 25591125 DOI: 10.1021/mp5006883] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this study, we formulated polyplexes with different compositions for codelivery of DNA and small-interfering RNA (siRNA). Since DNA and siRNA have distinctive and complementary morphological characteristics (DNA is long and winding and siRNA is short and rigid), we hypothesized that their codelivery using polyplex would enhance each other's transfection. To test this hypothesis, cationic polymer branched polyethylenimine (bPEI) as a standard transfecting agent and its derivative arginine-rich oligopeptide-grafted bPEI modified with polyethylene glycol (P(SiDAAr)5P3), synthesized in our laboratory, were used as carriers for transfection. Polyplexes at different nucleic acid to polymer weight ratios were characterized for transfection in breast cancer sensitive (MCF-7) and resistant (MCF-7/Adr) cell lines. Gene silencing effect of polyplexes was determined in MDA-MB-231-luc-D3H2LN cell line. The results demonstrated that the polyplexes formed with derivative P(SiDAAr)5P3 show significantly lower toxicity compared to polyplexes formed using bPEI. Further, codelivery resulted in 20-fold higher DNA transfection and 2-fold higher siRNA transfection as compared to the respective single nucleotide delivery. DNA transfection was ∼100-fold lower in resistant MCF-7/Adr cells than in sensitive MCF-7 cells. Confocal imaging and flow cytometry data demonstrated that enhanced transfection does not solely depend on DNA's cellular uptake, suggesting that other mechanisms contribute to increased transfection. DNA-co-siRNA delivery could be a promising therapeutic approach to achieve synergistic effects because it can simultaneously target and interfere with multiple regulatory levels in a cell to halt and reverse disease progression.
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Affiliation(s)
- Shan Lu
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic , Cleveland, Ohio 44195, United States
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9
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Hwang HS, Hu J, Na K, Bae YH. Role of polymeric endosomolytic agents in gene transfection: a comparative study of poly(L-lysine) grafted with monomeric L-histidine analogue and poly(L-histidine). Biomacromolecules 2014; 15:3577-86. [PMID: 25144273 PMCID: PMC4195522 DOI: 10.1021/bm500843r] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 07/31/2014] [Indexed: 01/18/2023]
Abstract
Endosomal entrapment is one of the main barriers that must be overcome for efficient gene expression along with cell internalization, DNA release, and nuclear import. Introducing pH-sensitive ionizable groups into the polycationic polymers to increase gene transfer efficiency has proven to be a useful method; however, a comparative study of introducing equal numbers of ionizable groups in both polymer and monomer forms, has not been reported. In this study, we prepared two types of histidine-grafted poly(L-lysine) (PLL), a stacking form of poly(L-histidine) (PLL-g-PHis) and a mono-L-histidine (PLL-g-mHis) with the same number of imidazole groups. These two types of histidine-grafted PLL, PLL-g-PHis and PLL-g-mHis, showed profound differences in hemolytic activity, cellular uptake, internalization, and transfection efficiency. Cy3-labeled PLL-g-PHis showed strong fluorescence in the nucleus after internalization, and high hemolytic activity upon pH changes was also observed from PLL-g-PHis. The arrangement of imidazole groups from PHis also provided higher gene expression than mHis due to its ability to escape the endosome. mHis or PHis grafting reduced the cytotoxicity of PLL and changed the rate of cellular uptake by changing the quantity of free ε-amines available for gene condensation. The subcellular localization of PLL-g-PHis/pDNA measured by YOYO1-pDNA intensity was highest inside the nucleus, while the lysotracker, which stains the acidic compartments was lowest among these polymers. Thus, the polymeric histidine arrangement demonstrate the ability to escape the endosome and trigger rapid release of polyplexes into the cytosol, resulting in a greater amount of pDNA available for translocation to the nucleus and enhanced gene expression.
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Affiliation(s)
- Hee Sook Hwang
- Department
of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, Skaggs Research Building, Rm 2760, 30S, 2000E, Salt Lake City, Utah 84112, United States
| | - Jun Hu
- Department
of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, Skaggs Research Building, Rm 2760, 30S, 2000E, Salt Lake City, Utah 84112, United States
| | - Kun Na
- Department
of Biotechnology, The Catholic University
of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do 420-743, Korea
| | - You Han Bae
- Department
of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, Skaggs Research Building, Rm 2760, 30S, 2000E, Salt Lake City, Utah 84112, United States
- Utah-Inha Drug
Delivery Systems (DDS) and Advanced Therapeutics Research Center, 7-50 Songdo-dong, Yeonsu-gu,
Incheon, 406-840, Korea
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10
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Cho H, Li L, Bae YH, Huh KM, Kang HC. Bioreducible Branched Polyethyleneimine Derivatives Physically Loaded with Hydrophobic Pheophorbide A: Preparation, Characterization, and Light-Induced Cytotoxicity. Macromol Biosci 2014; 14:1483-94. [DOI: 10.1002/mabi.201400145] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 06/11/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Hana Cho
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences; College of Pharmacy; The Catholic University of Korea; 43 Jibong-ro Wonmi-gu, Bucheon-si Gyeonggi-do 420-743 Republic of Korea
| | - Li Li
- Department of Polymer Science and Engineering; Chungnam National University; 99 Daehak-ro Yuseong-gu Daejeon 305-764 Republic of Korea
| | - You Han Bae
- Department of Pharmaceutics and Pharmaceutical Chemistry; The University of Utah; 30 S 2000 E, Rm 2972 Salt Lake City UT 84112 USA
- Utah-Inha Drug Delivery Systems (DDS) and Advanced Therapeutics Research Center; 7-50 Songdo-dong Yeonsu-gu Incheon 406-840 Republic of Korea
| | - Kang Moo Huh
- Department of Polymer Science and Engineering; Chungnam National University; 99 Daehak-ro Yuseong-gu Daejeon 305-764 Republic of Korea
| | - Han Chang Kang
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences; College of Pharmacy; The Catholic University of Korea; 43 Jibong-ro Wonmi-gu, Bucheon-si Gyeonggi-do 420-743 Republic of Korea
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PEGylated block copolymers containing tertiary amine side-chains cleavable via acid-labile ortho ester linkages for pH-triggered release of DNA. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.04.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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12
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13
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Zhang X, Li F, Guo S, Chen X, Wang X, Li J, Gan Y. Biofunctionalized polymer-lipid supported mesoporous silica nanoparticles for release of chemotherapeutics in multidrug resistant cancer cells. Biomaterials 2014; 35:3650-65. [DOI: 10.1016/j.biomaterials.2014.01.013] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 01/08/2014] [Indexed: 10/25/2022]
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14
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Tian L, Kang HC, Bae YH. Endosomolytic reducible polymeric electrolytes for cytosolic protein delivery. Biomacromolecules 2013; 14:2570-81. [PMID: 23841591 DOI: 10.1021/bm400337f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Despite the numerous vital functions of proteins in the cytosolic compartment, less attention has been paid to the delivery of protein drugs to the cytosol than to the plasma membrane. To address this issue and effectively deliver charged proteins into the cytoplasm, we used endosomolytic, thiol-triggered degradable polyelectrolytes as carriers. The cationic, reducible polyelectrolyte RPC-bPEI(0.8 kDa)2 was synthesized by the oxidative polymerization of thiolated branched polyethyleneimine (bPEI). The polymer was converted to the anionic, reducible polyelectrolyte RPA-bPEI(0.8 kDa)2 by introducing carboxylic acids. The two reducible polyelectrolytes (RPC-bPEI(0.8 kDa)2 and RPA-bPEI(0.8 kDa)2) were complexed with counter-charged model proteins (bovine serum albumin (BSA) and lysozyme (LYZ)), forming polyelectrolyte/protein complexes of less than 200 nm in size at weight ratios (WR) of ≥1. The resultant complexes maintained a proton buffering capacity nearly equivalent to that of the polyelectrolytes in the absence of protein complexation and were cytocompatible with MCF7 human breast carcinoma cells. Under cytosol-mimicking thiol-rich conditions, RPC-bPEI(0.8 kDa)2/BSA and RPA-bPEI(0.8 kDa)2/LYZ complexes increased significantly in size and released the loaded protein, unlike the protein complexes with nonreducible polyelectrolytes (bPEI(25 kDa) and bPEI(25 kDa)COOH). The polyelectrolyte/protein complexes showed cellular uptake similar to that of the corresponding proteins alone, but the former allowed more protein to escape into the cytosol from endolysosomes than the latter as a result of the endosomolytic function of the polyelectrolytes. In addition, the proteins in the polyelectrolyte/protein complexes kept their intrinsic secondary structures. In conclusion, the results show the potential of the designed endosomolytic, reducible polyelectrolytes for the delivery of proteins to the cytosol.
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Affiliation(s)
- Li Tian
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, Salt Lake City, 84112, USA
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15
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Williams M, Catchpoole D. Sequestration of AS-DACA into acidic compartments of the membrane trafficking system as a mechanism of drug resistance in rhabdomyosarcoma. Int J Mol Sci 2013; 14:13042-62. [PMID: 23799359 PMCID: PMC3742173 DOI: 10.3390/ijms140713042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 05/30/2013] [Accepted: 06/05/2013] [Indexed: 01/22/2023] Open
Abstract
The accumulation of weakly basic drugs into acidic organelles has recently been described as a contributor to resistance in childhood cancer rhabdomyosarcoma (RMS) cell lines with differential sensitivity to a novel topoisomerase II inhibitor, AS-DACA. The current study aims to explore the contribution of the endocytic pathway to AS-DACA sequestration in RMS cell lines. A 24-fold differential in AS-DACA cytotoxicity was detected between the RMS lines RD and Rh30. The effect of inhibitors of the endocytic pathway on AS-DACA sensitivity in RMS cell lines, coupled with the variations of endosomal marker expression, indicated the late endosomal/lysosomal compartment was implicated by confounding lines of evidence. Higher expression levels of Lysosomal-Associated Membrane Protein-1 (LAMP1) in the resistant RMS cell line, RD, provided correlations between the increased amount and activity of these compartments to AS-DACA resistance. The late endosomal inhibitor 3-methyladenine increased AS-DACA sensitivity solely in RD leading to the reduction of AS-DACA in membrane trafficking organelles. Acidification inhibitors did not produce an increase in AS-DACA sensitivity nor reduce its sequestration, indicating that the pH partitioning of weakly basic drugs into acidic compartments does not likely contribute to the AS-DACA sequestering resistance mechanism evident in RMS cells.
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Affiliation(s)
- Marissa Williams
- The Tumour Bank, Children's Cancer Research Unit, the Children's Hospital at Westmead, Westmead, NSW 2145, Australia.
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16
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Hwang HS, Kang HC, Bae YH. Bioreducible polymers as a determining factor for polyplex decomplexation rate and transfection. Biomacromolecules 2013; 14:548-56. [PMID: 23259985 DOI: 10.1021/bm301794d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Polyplex formation (complexation) and gene release from the polyplexes (decomplexation) are major events in polymeric gene delivery; however, the effect of the decomplexation rate on transfection has been rarely investigated. This study employed mixed polymers of poly((L)-lysine) (PLL: MW ~7.4 kDa) and reducible PLL (RPLL) (MW ~6.7 kDa) to design decomplexation rate-controllable PLL(100-x)RPLL(x)/pDNA complexes (PRL(x) polyplexes). The transfection efficiency of a model gene (luciferase) in MCF7 and HEK293 cell lines increased with increasing x (RPLL content) in the PRL(x) polyplexes until peaking at x = 2.5 and 10, respectively, after which point transfection efficiency declined rapidly. In MCF7 cells, PRL(2.5) polyplex produced 3 or 223 times higher gene expression than PLL or RPLL polyplexes, respectively. Similarly, the transfection efficiency of PRL(10) polyplex-transfected HEK293 cells was 3.8 or 67 times higher than that of PLL or RPLL polyplexes, respectively. The transfection results were not apparently related to the particle size, surface charge, complexation/compactness, cellular uptake, or cytotoxicity of the tested polyplexes. However, the decomplexation rate varied by RPLL content in the polyplexes, which in turn influenced the gene transfection. The nuclear localization of pDNA delivered by PRL(x) polyplexes showed a similar trend to their transfection efficiencies. This study suggests that an optimum decomplexation rate may result in high nuclear localization of pDNA and transfection. Understanding in decomplexation and intracellular localization of pDNA may help develop more effective polyplexes.
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Affiliation(s)
- Hee Sook Hwang
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, 421 Wakara Way, Salt Lake City, UT 84108, United States
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17
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Ke CJ, Chiang WL, Liao ZX, Chen HL, Lai PS, Sun JS, Sung HW. Real-time visualization of pH-responsive PLGA hollow particles containing a gas-generating agent targeted for acidic organelles for overcoming multi-drug resistance. Biomaterials 2013; 34:1-10. [DOI: 10.1016/j.biomaterials.2012.09.023] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 09/13/2012] [Indexed: 01/01/2023]
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18
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19
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Kang HC, Huh KM, Bae YH. Polymeric nucleic acid carriers: current issues and novel design approaches. J Control Release 2012; 164:256-64. [PMID: 22771981 DOI: 10.1016/j.jconrel.2012.06.036] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 06/25/2012] [Accepted: 06/27/2012] [Indexed: 11/26/2022]
Abstract
To deliver nucleic acids including plasmid DNA (pDNA) and short interfering RNA (siRNA), polymeric gene carriers equipped with various functionalities have been extensively investigated. The functionalities of these polymeric vectors have been designed to overcome various extracellular and intracellular hurdles that nucleic acids and their carriers encounter during their journey from injection site to intracellular target site. This review briefly introduces known extracellular and intracellular issues of nucleic acid delivery and their solution strategies. We examine significant yet overlooked factors affecting nucleic acid delivery (e.g., microenvironmental pH, polymer/siRNA complexation, and pharmaceutical formulation) and highlight our reported approaches to solve these problems.
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Affiliation(s)
- Han Chang Kang
- Department of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea, 43 Jibong-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do 420-743, Republic of Korea
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20
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Luo K, Li C, Li L, She W, Wang G, Gu Z. Arginine functionalized peptide dendrimers as potential gene delivery vehicles. Biomaterials 2012; 33:4917-27. [PMID: 22484048 DOI: 10.1016/j.biomaterials.2012.03.030] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 03/08/2012] [Indexed: 01/24/2023]
Abstract
The quest for highly efficient and safe gene delivery systems has become the key factor for successful application of gene therapy. Peptide dendrimers are currently investigated as excellent candidates for non-viral gene delivery vectors. In this study, we report the synthesis and characterization of arginine functionalized peptide dendrimer-based vectors ranging from 5th generation (G5A) to 6th generation (G6A) via click chemistry, and their use for gene transfection in vitro and in vivo. The dendrimers can condense plasmid DNA (pDNA) and protect pDNAs from nuclease digestion. Both atomic force microscopy (AFM) and dynamic light scattering (DLS) revealed that the sizes of dendrimer/DNA particles were within 180-250 nm range. In vitro studies showed that the functionalized peptide dendrimers provided serum independent and high transfection efficiency on all studied cells, as over 2 fold higher than that of branched polyetherimide (PEI) in the presence of serum. Dendrimer G5A with molecular weight of 17 kDa demonstrated 6-fold transfection activity than PEI in breast tumor models, as well as good biosafety proved by in vitro and in vivo toxicity evaluation. However, G6A with molecular weight of 46 kDa showed much higher cytotoxicity. The functionalized dendrimer G5A with optimal generation may be therefore a potential candidate for gene delivery vehicle.
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Affiliation(s)
- Kui Luo
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
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21
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Nanoscaled buffering zone of charged (PLGA)n-b-bPEI micelles in acidic microclimate for potential protein delivery application. J Control Release 2012; 160:440-50. [PMID: 22405902 DOI: 10.1016/j.jconrel.2012.02.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 02/06/2012] [Accepted: 02/26/2012] [Indexed: 11/23/2022]
Abstract
Poly(lactide-co-glycolide) (PLGA) has most often been employed for the controlled release of protein formulations because of its safety profile with non-toxic degradation products. Nevertheless, such formulations have been plagued by a local acidic microenvironment and protein-polymer interactions, which result in chemical and physical denaturation of loaded proteins and often unfavorable release profiles. This study investigated the pH change of inner PLGA microsphere (MS) using charged (PLGA)(n)-b-branched polyethyleneimine (bPEI) micelles. The designed micelles can be transformed into either micelle or reverse micelle (RM) depending on the solvent and RM can form microspheres. In addition, (PLGA)(n)-b-bPEI can be modified into (PLGA)(n)-b-(carboxylated bPEI) via carboxylation of the primary amines. Cationic micelle (CM) or anionic micelle (AM) was complexed with counter-charged proteins leading to nanosized particles (approximately 100nm). In the micelle/protein complexes, the micelles mostly maintained their proton buffering capacity, and consequently, prevented or delayed the typical decrease in pH caused by degradation of PLGA in aqueous solution. Reconstitutable micelle/protein complexes allowed for increased and fine-tuned protein loading (~20wt.% when using CM1 (CM prepared from PLGA(36kDa)-b-bPEI(25kDa))/insulin complexes) in PLGA MS. In CM2 (CM prepared from (PLGA(36kDa))(2)-b-bPEI(25kDa))/insulin (4 of weight ratio (WR) of micelle to protein; WR4)-loaded PLGA MS, CM2 strongly prevented the micellar nanoenvironmental pH (pH 6.6 within 5days and then approximately pH 8.5) to be acidified in PLGA MS for 9weeks, unlike CM2-free PLGA MS. In conclusion, our findings propose that the proton buffering capacity and protein loading in PLGA MS can be tuned by controlling the complexation ratios of micelles and proteins, polymeric architectures of (PLGA)(n)-b-bPEI copolymers and WR of micelle/protein complexes and PLGA (or RM).
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22
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Chen YP, Chen HA, Hung Y, Chien FC, Chen P, Mou CY. Surface charge effect in intracellular localization of mesoporous silicananoparticles as probed by fluorescent ratiometric pH imaging. RSC Adv 2012. [DOI: 10.1039/c1ra00586c] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Kang HC, Samsonova O, Kang SW, Bae YH. The effect of environmental pH on polymeric transfection efficiency. Biomaterials 2011; 33:1651-62. [PMID: 22130563 DOI: 10.1016/j.biomaterials.2011.11.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 11/07/2011] [Indexed: 11/15/2022]
Abstract
Although polymers, polyplexes, and cells are exposed to various extracellular and intracellular pH environments during polyplex preparation and polymeric transfection, the impact of environmental pH on polymeric transfection has not yet been investigated. This study aims to understand the influence of environmental pH on polymeric transfection by modulating the pH of the transfection medium or the culture medium. Changes in the extracellular pH affected polymeric transfection by way of complex factors such as pH-induced changes in polymer characteristics (e.g., proton buffering capacity and ionization), polyplex characteristics (e.g., size, surface charge, and decomplexation), and cellular characteristics (e.g., cellular uptake, cell cycle phases, and intracellular pH environment). Notably, acidic medium delayed endocytosis, endosomal acidification, cytosolic release, and decomplexation of polyplexes, thereby negatively affecting gene expression. However, acidic medium inhibited mitosis and reduced dilution of gene expression, resulting in increased transfection efficiency. Compared to pH 7.4 medium, acidic transfection medium reduced gene expression 1.6-7.7-fold whereas acidic culture medium enhanced transfection efficiency 2.1-2.6-fold. Polymeric transfection was affected more by the culture medium than by the transfection medium. Understanding the effects of extracellular pH during polymeric transfection may stimulate new strategies for determining effective and safe polymeric gene carriers.
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Affiliation(s)
- Han Chang Kang
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, Salt Lake City, UT 84108, USA
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24
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Yu H, Zou Y, Wang Y, Huang X, Huang G, Sumer BD, Boothman DA, Gao J. Overcoming endosomal barrier by amphotericin B-loaded dual pH-responsive PDMA-b-PDPA micelleplexes for siRNA delivery. ACS NANO 2011; 5:9246-55. [PMID: 22011045 PMCID: PMC4797624 DOI: 10.1021/nn203503h] [Citation(s) in RCA: 172] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The endosomal barrier is a major bottleneck for the effective intracellular delivery of siRNA by nonviral nanocarriers. Here, we report a novel amphotericin B (AmB)-loaded, dual pH-responsive micelleplex platform for siRNA delivery. Micelles were self-assembled from poly(2-(dimethylamino)ethyl methacrylate)-block-poly(2-(diisopropylamino)ethyl methacrylate) (PDMA-b-PDPA) diblock copolymers. At pH 7.4, AmB was loaded into the hydrophobic PDPA core, and siRNA was complexed with a positively charged PDMA shell to form the micelleplexes. After cellular uptake, the PDMA-b-PDPA/siRNA micelleplexes dissociated in early endosomes to release AmB. Live cell imaging studies demonstrated that released AmB significantly increased the ability of siRNA to overcome the endosomal barrier. Transfection studies showed that AmB-loaded micelleplexes resulted in significant increase in luciferase (Luc) knockdown efficiency over the AmB-free control. The enhanced Luc knockdown efficiency was abolished by bafilomycin A1, a vacuolar ATPase inhibitor that inhibits the acidification of the endocytic organelles. These data support the central hypothesis that membrane poration by AmB and increased endosomal swelling and membrane tension by a "proton sponge" polymer provided a synergistic strategy to disrupt endosomes for improved intracellular delivery of siRNA.
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Affiliation(s)
- Haijun Yu
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Yonglong Zou
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
- Department of Radiation Oncology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Yiguang Wang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Xiaonan Huang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Gang Huang
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Baran D. Sumer
- Department of Otolaryngology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - David A. Boothman
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
- Department of Radiation Oncology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - Jinming Gao
- Department of Pharmacology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
- Address correspondence to
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25
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Ingle NP, Malone B, Reineke TM. Poly(glycoamidoamine)s: a broad class of carbohydrate-containing polycations for nucleic acid delivery. Trends Biotechnol 2011; 29:443-53. [DOI: 10.1016/j.tibtech.2011.04.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 04/08/2011] [Accepted: 04/29/2011] [Indexed: 01/16/2023]
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26
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Co-delivery of small interfering RNA and plasmid DNA using a polymeric vector incorporating endosomolytic oligomeric sulfonamide. Biomaterials 2011; 32:4914-24. [PMID: 21489622 DOI: 10.1016/j.biomaterials.2011.03.042] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 03/11/2011] [Indexed: 11/23/2022]
Abstract
Cationic polymers are potential intracellular carriers for small interfering RNA (siRNA). The short and rigid nature of an siRNA chain often results in larger and more loosely packed particles compared to plasmid DNA (pDNA) after complexing with carrier polycations, and in turn, poor silencing effects are seen against the target mRNAs. A helper polyanion, pDNA, was incorporated along with siRNA to form compact nanosized polyplexes. At C/A (cation/anion) ratios of 2 and 5, poly(l-lysine) (PLL)/siRNA-pGFP and PLL/siRNA-pGFP-OSDZ (oligomeric sulfadiazine (OSDZ) for endosomolysis) complexes produced particles 90-150 nm in size with a 15-45 mV surface charge, while PLL/siRNA complexes yielded particles 1-2 μm in size at the same C/A ratios. The PLL/siRNA-pGFP (C/A 2) complexes showed significantly higher specific gene silencing (50-90% vs. 10-25%) than the complexes formed at C/A 5. PLL/siRNA-pGFP-OSDZ (C/A 2) complexes improved the specific gene silencing (90%) more dramatically than PLL/siRNA-pGFP (C/A 2) complexes (50%), demonstrating a potential role for OSDZ. PLL/siRNA-pGFP-OSDZ (C/A 2) complexes sustained higher specific gene silencing compared with PLL/siRNA-pGFP (C/A 2) complexes. Other oligomeric sulfonamides (OSA) with varying pK(a) used in PLL/siRNA-pGFP-OSA complexes also caused effective gene silencing. The pGFP in the PLL/siRNA-pGFP complexes successfully expressed GFP protein without interfering with the siRNA. In conclusion, this study demonstrates that long pDNA helps effectively form nanosized siRNA particles and that OSA enhances specific gene silencing. In a single nucleic acid carrier formulation, co-delivery of siRNA and pDNA is feasible to maximize therapeutic effects or to include therapeutic or diagnostic functionalities.
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27
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Shen Y, Ma X, Zhang B, Zhou Z, Sun Q, Jin E, Sui M, Tang J, Wang J, Fan M. Degradable Dual pH‐ and Temperature‐Responsive Photoluminescent Dendrimers. Chemistry 2011; 17:5319-26. [DOI: 10.1002/chem.201003495] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Indexed: 12/29/2022]
Affiliation(s)
- Youqing Shen
- Center for Bionanoengineering and State Key Laboratory of Chemical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou, 310027 (P.R. China), Fax: (+86) 571‐87953993
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071 (USA)
| | - Xinpeng Ma
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071 (USA)
| | - Bo Zhang
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071 (USA)
| | - Zhuxian Zhou
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071 (USA)
| | - Qihang Sun
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071 (USA)
| | - Erlei Jin
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071 (USA)
| | - Meihua Sui
- Center for Bionanoengineering and State Key Laboratory of Chemical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou, 310027 (P.R. China), Fax: (+86) 571‐87953993
| | - Jianbin Tang
- Center for Bionanoengineering and State Key Laboratory of Chemical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou, 310027 (P.R. China), Fax: (+86) 571‐87953993
| | - Jinqiang Wang
- Center for Bionanoengineering and State Key Laboratory of Chemical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou, 310027 (P.R. China), Fax: (+86) 571‐87953993
| | - Maohong Fan
- Department of Chemical and Petroleum Engineering, University of Wyoming, Laramie, WY 82071 (USA)
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28
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Mishra D, Kang HC, Bae YH. Reconstitutable charged polymeric (PLGA)(2)-b-PEI micelles for gene therapeutics delivery. Biomaterials 2011; 32:3845-54. [PMID: 21354616 DOI: 10.1016/j.biomaterials.2011.01.077] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Accepted: 01/31/2011] [Indexed: 11/18/2022]
Abstract
This study investigated the potential of creating a charged polymeric micelle-based nucleic acid delivery system that could easily be reconstituted by the addition of water. (PLGA(36kDa))(2)-b-bPEI(25kDa) (PLGA MW 36 kDa, bPEI M(w) 25 kDa, PLGA:bPEI block ratio = 2) was synthesized and used to prepare cationic micelles. The copolymer retained proton-buffering capability from the bPEI block within the endosomal pH range. Micelle/pDNA complexes retained their particle size (100-150 nm) and surface charge (30-40 mV) following reconstitution. It was found that adding a small amount of low molecular weight bPEI (1.8 kDa) completely shielded pDNA in the micelle/pDNA complexes and enhanced transfection efficiency 50-100 fold for both fresh and reconstituted complexes without affecting complex size. Transfection efficiency for "reconstituted" micelle/pDNA/bPEI(1.8kDa) (WR 1) complexes was 16-fold higher than its "fresh" counterpart. Although transfection levels achieved using "reconstituted" micelle/pDNA/bPEI(1.8kDa) complexes were 3.6-fold lower than control "fresh" bPEI(25kDa)/pDNA (N/P 5) complexes, transfection levels were 39-fold higher than "reconstituted" bPEI(25kDa)/pDNA (N/P 5) complexes. The micelle/pDNA/bPEI(1.8kDa) system showed very low cytotoxicity in MCF7 cells even with pDNA doses up to 20 μg, and transfection levels increased linearly with increasing pDNA dose. These results indicate that this PLGA-b-bPEI polymeric micelle-based system is well suited as a reconstitutable gene delivery system, and has high potential for use as a delivery system for gene therapy applications.
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Affiliation(s)
- Deepa Mishra
- Department of Bioengineering, The University of Utah, 20 S. 2030 E., Rm. 108, Salt Lake City, UT 84112, USA
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29
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Yan Y, Ochs CJ, Such GK, Heath JK, Nice EC, Caruso F. Bypassing multidrug resistance in cancer cells with biodegradable polymer capsules. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:5398-403. [PMID: 20976679 DOI: 10.1002/adma.201003162] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Affiliation(s)
- Yan Yan
- Centre for Nanoscience and Nanotechnology, Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
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Kang HC, Kang HJ, Bae YH. A reducible polycationic gene vector derived from thiolated low molecular weight branched polyethyleneimine linked by 2-iminothiolane. Biomaterials 2010; 32:1193-203. [PMID: 21071079 DOI: 10.1016/j.biomaterials.2010.08.079] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Accepted: 08/27/2010] [Indexed: 10/18/2022]
Abstract
To improve transfection efficiency and reduce the cytotoxicity of polymeric gene vectors, reducible polycations (RPC) were synthesized from low molecular weight (MW) branched polyethyleneimine (bPEI) via thiolation and oxidation. RPC (RPC-bPEI(0.8 kDa)) possessed MW of 5 kDa-80 kDa, and 50%-70% of the original proton buffering capacity of bPEI(0.8 kDa) was preserved in the final product. The cytotoxicity of RPC-bPEI(0.8 kDa) was 8-19 times less than that of the gold standard of polymeric transfection reagents, bPEI(25 kDa). Although bPEI(0.8 kDa) exhibited poor gene condensing capacities (∼2 μm at a weight ratio (WR) of 40), RPC-bPEI(0.8 kDa) effectively condensed plasmid DNA (pDNA) at a WR of 2. Moreover, RPC-bPEI(0.8 kDa)/pDNA (WR ≥2) formed 100-200 nm-sized particles with positively charged surfaces (20-35 mV). In addition, the results of the present study indicated that thiol/polyanions triggered the release of pDNA from RPC-bPEI(0.8 kDa)/pDNA via the fragmentation of RPC-bPEI(0.8 kDa) and ion-exchange. With negligible polyplex-mediated cytotoxicity, the transfection efficiencies of RPC-bPEI(0.8 kDa)/pDNA were approximately 1200-1500-fold greater than that of bPEI(0.8 kDa)/pDNA and were equivalent or superior (∼7-fold) to that of bPEI(25 kDa)/pDNA. Interestingly, the distribution of high MW RPC-bPEI(0.8 kDa)/pDNA in the nucleus of the cell was higher than that of low MW RPC-bPEI(0.8 kDa)/pDNA. Thus, the results of the present study suggest that RPC-bPEI(0.8 kDa) has the potential to effectively deliver genetic materials with lower levels of toxicity.
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Affiliation(s)
- Han Chang Kang
- Department of Pharmaceutics and Pharmaceutical Chemistry, The University of Utah, 421 Wakara way, Suite 318, Salt Lake City, UT 84108, USA
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