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Lei L, Pan W, Shou X, Shao Y, Ye S, Zhang J, Kolliputi N, Shi L. Nanomaterials-assisted gene editing and synthetic biology for optimizing the treatment of pulmonary diseases. J Nanobiotechnology 2024; 22:343. [PMID: 38890749 PMCID: PMC11186260 DOI: 10.1186/s12951-024-02627-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 06/06/2024] [Indexed: 06/20/2024] Open
Abstract
The use of nanomaterials in gene editing and synthetic biology has emerged as a pivotal strategy in the pursuit of refined treatment methodologies for pulmonary disorders. This review discusses the utilization of nanomaterial-assisted gene editing tools and synthetic biology techniques to promote the development of more precise and efficient treatments for pulmonary diseases. First, we briefly outline the characterization of the respiratory system and succinctly describe the principal applications of diverse nanomaterials in lung ailment treatment. Second, we elaborate on gene-editing tools, their configurations, and assorted delivery methods, while delving into the present state of nanomaterial-facilitated gene-editing interventions for a spectrum of pulmonary diseases. Subsequently, we briefly expound on synthetic biology and its deployment in biomedicine, focusing on research advances in the diagnosis and treatment of pulmonary conditions against the backdrop of the coronavirus disease 2019 pandemic. Finally, we summarize the extant lacunae in current research and delineate prospects for advancement in this domain. This holistic approach augments the development of pioneering solutions in lung disease treatment, thereby endowing patients with more efficacious and personalized therapeutic alternatives.
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Affiliation(s)
- Lanjie Lei
- Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province, Institute of Translational Medicine, Zhejiang Shuren University, Hangzhou, Zhejiang, 310015, China
| | - Wenjie Pan
- Department of Pharmacy, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325200, China
| | - Xin Shou
- Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province, Institute of Translational Medicine, Zhejiang Shuren University, Hangzhou, Zhejiang, 310015, China
| | - Yunyuan Shao
- Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province, Institute of Translational Medicine, Zhejiang Shuren University, Hangzhou, Zhejiang, 310015, China
| | - Shuxuan Ye
- Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province, Institute of Translational Medicine, Zhejiang Shuren University, Hangzhou, Zhejiang, 310015, China
| | - Junfeng Zhang
- Department of Immunology and Medical Microbiology, Nanjing University of Chinese Medicine, Nanjing, 210046, China
| | - Narasaiah Kolliputi
- Division of Allergy and Immunology, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Liyun Shi
- Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province, Institute of Translational Medicine, Zhejiang Shuren University, Hangzhou, Zhejiang, 310015, China.
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Abstract
Therapeutic viral gene delivery is an emerging technology which aims to correct genetic mutations by introducing new genetic information to cells either to correct a faulty gene or to initiate cell death in oncolytic treatments. In recent years, significant scientific progress has led to several clinical trials resulting in the approval of gene therapies for human treatment. However, successful therapies remain limited due to a number of challenges such as inefficient cell uptake, low transduction efficiency (TE), limited tropism, liver toxicity and immune response. To adress these issues and increase the number of available therapies, additives from a broad range of materials like polymers, peptides, lipids, nanoparticles, and small molecules have been applied so far. The scope of this review is to highlight these selected delivery systems from a materials perspective.
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Affiliation(s)
- Kübra Kaygisiz
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
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Pferdehirt L, Ross AK, Brunger JM, Guilak F. A Synthetic Gene Circuit for Self-Regulating Delivery of Biologic Drugs in Engineered Tissues. Tissue Eng Part A 2019; 25:809-820. [PMID: 30968743 DOI: 10.1089/ten.tea.2019.0027] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
IMPACT STATEMENT We engineered a synthetic transcription system based on nuclear factor kappa-light-chain-enhancer of activated B cells signaling that can attenuate the effects of the inflammatory cytokine interleukin (IL)-1α in a self-regulating manner. This system responds in a time- and dose-dependent manner to rapidly produce therapeutic levels of IL-1 receptor antagonist (IL-1Ra). The use of lentiviral gene therapy allows this system to be utilized through different transduction methods and in different cell types for a variety of applications. Broadly, this approach may be applicable in developing autoregulated biologic systems for tissue engineering and drug delivery in a range of disease applications.
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Affiliation(s)
- Lara Pferdehirt
- 1 Department of Orthopedic Surgery, Washington University in Saint Louis, Saint Louis, Missouri.,2 Shriners Hospitals for Children-St. Louis, St. Louis, Missouri.,3 Department of Biomedical Engineering, Washington University in Saint Louis, Saint Louis, Missouri.,4 Center of Regenerative Medicine, Washington University in Saint Louis, Saint Louis, Missouri
| | - Alison K Ross
- 1 Department of Orthopedic Surgery, Washington University in Saint Louis, Saint Louis, Missouri.,2 Shriners Hospitals for Children-St. Louis, St. Louis, Missouri.,3 Department of Biomedical Engineering, Washington University in Saint Louis, Saint Louis, Missouri.,4 Center of Regenerative Medicine, Washington University in Saint Louis, Saint Louis, Missouri
| | - Jonathan M Brunger
- 5 Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, California
| | - Farshid Guilak
- 1 Department of Orthopedic Surgery, Washington University in Saint Louis, Saint Louis, Missouri.,2 Shriners Hospitals for Children-St. Louis, St. Louis, Missouri.,3 Department of Biomedical Engineering, Washington University in Saint Louis, Saint Louis, Missouri.,4 Center of Regenerative Medicine, Washington University in Saint Louis, Saint Louis, Missouri
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Kim SH, Yu SJ, Kim I, Choi J, Choi YH, Im SG, Hwang NS. A biofunctionalized viral delivery patch for spatially defined transfection. Chem Commun (Camb) 2019; 55:2317-2320. [PMID: 30720044 DOI: 10.1039/c8cc09768b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Gene therapy holds the significance of correcting genetic defects. However, difficulties in the in vivo delivery to the targeted tissues and systemic delivery remain the biggest challenges to be overcome. Here, a robust system of biofunctionalized polymeric layer-mediated lentiviral delivery was designed for the site-specific spatial and temporal control of viral gene delivery. Poly glycidyl methacrylate (pGMA) modification of a substrate via initiated chemical vapor deposition (iCVD) followed by polyethyleneimine (PEI) immobilization provided the adhesion site for the lentivirus. Furthermore, the polymeric patch based gene delivery system showed a high rate of gene transduction compared to bolus treatment. Furthermore, by using mask patterning, we were able to spatially pattern the lentivirus which allowed spatially defined transfection.
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Affiliation(s)
- Su-Hwan Kim
- Institute of Engineering Research, Seoul National University, Seoul, 151-742, Republic of Korea.
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5
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Huynh NPT, Brunger JM, Gloss CC, Moutos FT, Gersbach CA, Guilak F. Genetic Engineering of Mesenchymal Stem Cells for Differential Matrix Deposition on 3D Woven Scaffolds. Tissue Eng Part A 2018; 24:1531-1544. [PMID: 29756533 DOI: 10.1089/ten.tea.2017.0510] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Tissue engineering approaches for the repair of osteochondral defects using biomaterial scaffolds and stem cells have remained challenging due to the inherent complexities of inducing cartilage-like matrix and bone-like matrix within the same local environment. Members of the transforming growth factor β (TGFβ) family have been extensively utilized in the engineering of skeletal tissues, but have distinct effects on chondrogenic and osteogenic differentiation of progenitor cells. The goal of this study was to develop a method to direct human bone marrow-derived mesenchymal stem cells (MSCs) to deposit either mineralized matrix or a cartilaginous matrix rich in glycosaminoglycan and type II collagen within the same biochemical environment. This differential induction was performed by culturing cells on engineered three-dimensionally woven poly(ɛ-caprolactone) (PCL) scaffolds in a chondrogenic environment for cartilage-like matrix production while inhibiting TGFβ3 signaling through Mothers against DPP homolog 3 (SMAD3) knockdown, in combination with overexpressing RUNX2, to achieve mineralization. The highest levels of mineral deposition and alkaline phosphatase activity were observed on scaffolds with genetically engineered MSCs and exhibited a synergistic effect in response to SMAD3 knockdown and RUNX2 expression. Meanwhile, unmodified MSCs on PCL scaffolds exhibited accumulation of an extracellular matrix rich in glycosaminoglycan and type II collagen in the same biochemical environment. This ability to derive differential matrix deposition in a single culture condition opens new avenues for developing complex tissue replacements for chondral or osteochondral defects.
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Affiliation(s)
- Nguyen P T Huynh
- 1 Department of Orthopaedic Surgery, Washington University in Saint Louis , Saint Louis, Missouri.,2 Shriners Hospitals for Children-St. Louis , St. Louis, Missouri.,3 Department of Cell Biology, Duke University , Durham, North Carolina
| | | | - Catherine C Gloss
- 1 Department of Orthopaedic Surgery, Washington University in Saint Louis , Saint Louis, Missouri.,2 Shriners Hospitals for Children-St. Louis , St. Louis, Missouri
| | | | - Charles A Gersbach
- 6 Department of Biomedical Engineering, Duke University , Durham, North Carolina
| | - Farshid Guilak
- 1 Department of Orthopaedic Surgery, Washington University in Saint Louis , Saint Louis, Missouri.,2 Shriners Hospitals for Children-St. Louis , St. Louis, Missouri.,5 Cytex Therapeutics, Inc. , Durham, North Carolina
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Yang S, Zhou X, Li R, Fu X, Sun P. Optimized PEI-based Transfection Method for Transient Transfection and Lentiviral Production. CURRENT PROTOCOLS IN CHEMICAL BIOLOGY 2017; 9:147-157. [PMID: 28910855 DOI: 10.1002/cpch.25] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Polyethyleneimine (PEI), a cationic polymer vehicle, forms a complex with DNA which then can carry anionic nucleic acids into eukaryotic cells. PEI-based transfection is widely used for transient transfection of plasmid DNA. The efficiency of PEI-based transfection is affected by numerous factors, including the way the PEI/DNA complex is prepared, the ratio of PEI to DNA, the concentration of DNA, the storage conditions of PEI solutions, and more. Considering the major influencing factors, PEI-based transfection has been optimized to improve its efficiency, reproducibility, and consistency. This protocol outlines the steps for ordinary transient transfection and lentiviral production using PEI. © 2017 by John Wiley & Sons, Inc.
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Affiliation(s)
- Shaozhe Yang
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, People's Republic of China
- Reproductive and Genetic Center, The First Affiliated Hospital of Luohe Medical College, Luohe, People's Republic of China
| | - Xiaoling Zhou
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, People's Republic of China
| | - Rongxiang Li
- Reproductive and Genetic Center, The First Affiliated Hospital of Luohe Medical College, Luohe, People's Republic of China
| | - Xiuhong Fu
- Reproductive and Genetic Center, The First Affiliated Hospital of Luohe Medical College, Luohe, People's Republic of China
| | - Pingnan Sun
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, People's Republic of China
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Li J, Xu Q, Teng B, Yu C, Li J, Song L, Lai YX, Zhang J, Zheng W, Ren PG. Investigation of angiogenesis in bioactive 3-dimensional poly(d,l-lactide-co-glycolide)/nano-hydroxyapatite scaffolds by in vivo multiphoton microscopy in murine calvarial critical bone defect. Acta Biomater 2016; 42:389-399. [PMID: 27326916 DOI: 10.1016/j.actbio.2016.06.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 06/16/2016] [Accepted: 06/17/2016] [Indexed: 12/19/2022]
Abstract
UNLABELLED Reconstruction of critical size bone defects remains a major clinical challenge because of poor bone regeneration, which is usually due to poor angiogenesis during repair. Satisfactory vascularization is a prerequisite for the survival of grafts and the integration of new tissue with existing tissue. In this work, we investigated angiogenesis in 3D scaffolds by in vivo multiphoton microscopy during bone formation in a murine calvarial critical bone defect model and evaluated bone regeneration 8weeks post-implantation. The continuous release of bioactive lentiviral vectors (LV-pdgfb) from the scaffolds could be detected for 5days in vitro. In vivo, the released LV-pdgfb transfected adjacent cells and expressed PDGF-BB, facilitating angiogenesis and enhancing bone regeneration. The expression of both pdgfb and the angiogenesis-related genes vWF and VEGFR2 was significantly increased in the pdgfb gene-carrying scaffold (PHp) group. In addition, microCT scanning and histomorphology results proved that there was more new bone ingrowth in the PHp group than in the PLGA/nHA (PH) and control groups. MicroCT parameters, including BMD, BV/TV, Tb.Sp, and Tb.N indicated that there was significantly more new bone formation in the PHp group than in the other groups. With regard to neovascularization, 8weeks post-implantation, blood vessel areas (BVAs) were 9428±944μm(2), 4090±680.3μm(2), and none in the PHp, PH, and control groups, respectively. At each time point, BVAs in the PHp scaffolds were significantly higher than in the PH scaffolds. To our knowledge, this is the first use of multiphoton microscopy in bone tissue-engineering to investigate angiogenesis in scaffolds in vivo. This method represents a valuable tool for investigating neovascularization in bone scaffolds to determine if a certain scaffold is beneficial to neovascularization. We also proved that delivery of the pdgfb gene alone can improve both angiogenesis and bone regeneration Acronyms. STATEMENT OF SIGNIFICANCE Reconstruction of critical size bone defects remains a major clinical challenge because of poor bone regeneration, which is usually due to poor angiogenesis during repair. Satisfactory vascularization is a prerequisite for the survival of grafts and the integration of new tissue with existing tissue. In this work, we investigated angiogenesis in 3D scaffolds by in vivo multiphoton microscopy during bone formation in a murine calvarial critical bone defect model and evaluated bone regeneration 8weeks post-implantation. To verify that pdgfb-expressing vectors carried by the scaffolds can promote angiogenesis in 3D-printed scaffolds in vivo, we monitored angiogenesis within the implants by multiphoton microscopy. To our knowledge, this is the first study to dynamically investigate angiogenesis in bone tissue engineering scaffolds in vivo.
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Affiliation(s)
- Jian Li
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Qiang Xu
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Bin Teng
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Chen Yu
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China; Orthopedics Department, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, China
| | - Jian Li
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China; Orthopedics Department, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, China
| | - Liang Song
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Yu-Xiao Lai
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Jian Zhang
- Laboratory for Reproductive Health, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Wei Zheng
- Research Laboratory for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China.
| | - Pei-Gen Ren
- Center for Translational Medicine Research and Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China.
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8
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Yin PT, Han E, Lee KB. Engineering Stem Cells for Biomedical Applications. Adv Healthc Mater 2016; 5:10-55. [PMID: 25772134 PMCID: PMC5810416 DOI: 10.1002/adhm.201400842] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 02/14/2015] [Indexed: 12/19/2022]
Abstract
Stem cells are characterized by a number of useful properties, including their ability to migrate, differentiate, and secrete a variety of therapeutic molecules such as immunomodulatory factors. As such, numerous pre-clinical and clinical studies have utilized stem cell-based therapies and demonstrated their tremendous potential for the treatment of various human diseases and disorders. Recently, efforts have focused on engineering stem cells in order to further enhance their innate abilities as well as to confer them with new functionalities, which can then be used in various biomedical applications. These engineered stem cells can take on a number of forms. For instance, engineered stem cells encompass the genetic modification of stem cells as well as the use of stem cells for gene delivery, nanoparticle loading and delivery, and even small molecule drug delivery. The present Review gives an in-depth account of the current status of engineered stem cells, including potential cell sources, the most common methods used to engineer stem cells, and the utilization of engineered stem cells in various biomedical applications, with a particular focus on tissue regeneration, the treatment of immunodeficiency diseases, and cancer.
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Affiliation(s)
- Perry T Yin
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ, 08854, USA
| | - Edward Han
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, ON, M5S 3G9, Canada
| | - Ki-Bum Lee
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ, 08854, USA
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ, 08854, USA
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Wang H, Pan J, Chen H, Yuan L. Application of Polyethylenimine-Grafted Silicon Nanowire Arrays for Gene Transfection. Methods Mol Biol 2016; 1445:279-87. [PMID: 27436326 DOI: 10.1007/978-1-4939-3718-9_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Polyplexes are one of the most important and promising approaches to deliver exogenous DNA into cells. However, it is severely restricted by the aggregation of polyplexes. Surface-tethered polyplexes can inhibit the aggregation effect and increase the local concentrations of DNA, exhibiting an excellent potential in gene transfection. Since silicon nanowires have the ability to penetrate the cell membrane, branched polyethylenimine (bPEI)-grafted silicon nanowire arrays (SiNWAs) can stimulate gene transfection to a great extent. Herein, the method for the preparation of bPEI-grafted SiNWAs, as an example of surface-tethered polyplexes, is introduced in detail.
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Affiliation(s)
- Hongwei Wang
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, P. R. China.
| | - Jingjing Pan
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, P. R. China
| | - Hong Chen
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, P. R. China
| | - Lin Yuan
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, P. R. China.
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10
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Wu C, Li J, Pang P, Liu J, Zhu K, Li D, Cheng D, Chen J, Shuai X, Shan H. Polymeric vector-mediated gene transfection of MSCs for dual bioluminescent and MRI tracking in vivo. Biomaterials 2014; 35:8249-60. [PMID: 24976241 DOI: 10.1016/j.biomaterials.2014.06.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 06/05/2014] [Indexed: 12/22/2022]
Abstract
MSC's transplantation is a promising cell-based therapy for injuries in regenerative medicine, and in vivo visualization of transplanted MSCs with noninvasive technique is essential for the tracking of cell infusion and homing. A new cationic polymer, poly(ethylene glycol)-block-poly(l-aspartic acid)-grafted polyethylenimine functionalized with superparamagnetic iron oxide nanoparticles (PAI/SPION), was constructed as a magnetic resonance imaging (MRI)-visible non-viral vector for the delivery of plasmids DNA (pDNA) encoding for luciferase and red fluorescence protein (RFP) as reporter genes into MSCs. As a result, the MSCs were labeled with SPION and reporter genes. The PAI/SPION complexes exhibited high transfection efficiency in transferring pDNA into MSCs, which resulted in efficient luciferase and RFP co-expression. Furthermore, the complexes did not significantly affect the viability and multilineage differentiation capacity of MSCs. After the labeled MSCs were transplanted into the rats with acute liver injury via the superior mesenteric vein (SMV) injection, the migration behavior and organ-specific accumulation of the cells could be effectively monitored using the in vivo imaging system (IVIS) and MRI, respectively. The immunohistochemical analysis further confirmed that the transplanted MSCs were predominantly distributed in the liver parenchyma. Our results indicate that the PAI/SPION is a MRI-visible gene delivery agent which can effectively label MSCs to provide the basis for bimodal bioluminescence and MRI tracking in vivo.
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Affiliation(s)
- Chun Wu
- Molecular Imaging Lab, Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China; Interventional Radiology Institute, Sun Yat-sen University, Guangzhou 510630, China
| | - Jingguo Li
- PCFM Lab of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Pengfei Pang
- Molecular Imaging Lab, Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China; Interventional Radiology Institute, Sun Yat-sen University, Guangzhou 510630, China
| | - Jingjing Liu
- Molecular Imaging Lab, Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Kangshun Zhu
- Molecular Imaging Lab, Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China; Interventional Radiology Institute, Sun Yat-sen University, Guangzhou 510630, China
| | - Dan Li
- Molecular Imaging Lab, Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Du Cheng
- PCFM Lab of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Junwei Chen
- Molecular Imaging Lab, Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China; Interventional Radiology Institute, Sun Yat-sen University, Guangzhou 510630, China
| | - Xintao Shuai
- PCFM Lab of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
| | - Hong Shan
- Molecular Imaging Lab, Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China; Interventional Radiology Institute, Sun Yat-sen University, Guangzhou 510630, China.
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Pan J, Lyu Z, Jiang W, Wang H, Liu Q, Tan M, Yuan L, Chen H. Stimulation of gene transfection by silicon nanowire arrays modified with polyethylenimine. ACS APPLIED MATERIALS & INTERFACES 2014; 6:14391-14398. [PMID: 25032791 DOI: 10.1021/am5036626] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this work, a novel gene delivery strategy was proposed based on silicon nanowire arrays modified with high-molecular-weight 25 kDa branched polyethylenimine (SN-PEI). Both the plasmid DNA (pDNA) binding capacity and the in vitro gene transfection efficiency of silicon nanowire arrays (SiNWAs) were significantly enhanced after modification with high-molecular-weight bPEI. Moreover, the transfection efficiency was substantially further increased by the introduction of free pDNA/PEI complexes formed by low-molecular-weight branched PEI (bPEI, 2 kDa). Additionally, factors affecting the in vitro transfection efficiency of the novel gene delivery system were investigated in detail, and the transfection efficiency was optimized on SN-PEI with a bPEI grafting time of 3 h, an incubation time of 10 min for tethered pDNA/PEI complexes consisting of high-molecular-weight bPEI grafted onto SiNWAs, and with an N/P ratio of 80 for free pDNA/PEI complexes made of low-molecular-weight bPEI. Together, our results indicate that high-molecular-weight bPEI modified SiNWAs can serve as an efficient platform for gene delivery.
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Affiliation(s)
- Jingjing Pan
- The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, P. R. China
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12
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Kim E, Lee S, Hong S, Jin G, Kim M, Park KI, Lee H, Jang JH. Sticky "delivering-from" strategies using viral vectors for efficient human neural stem cell infection by bioinspired catecholamines. ACS APPLIED MATERIALS & INTERFACES 2014; 6:8288-8294. [PMID: 24827581 DOI: 10.1021/am5011095] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Controlled release of biosuprastructures, such as viruses, from surfaces has been a challenging task in providing efficient ex vivo gene delivery. Conventional controlled viral release approaches have demonstrated low viral immobilization and burst release, inhibiting delivery efficiency. Here, a highly powerful substrate-mediated viral delivery system was designed by combining two key components that have demonstrated great potential in the fields of gene therapy and surface chemistry, respectively: adeno-associated viral (AAV) vectors and adhesive catecholamine surfaces. The introduction of a nanoscale thin coating of catecholamines, poly(norepinephrine) (pNE) or poly(dopamine) (pDA) to provide AAV adhesion followed by human neural stem cell (hNSC) culture on sticky solid surfaces exhibited unprecedented results: approximately 90% loading vs 25% (AAV_bare surface), no burst release, sustained release at constant rates, approximately 70% infection vs 20% (AAV_bare surface), and rapid internalization. Importantly, the sticky catecholamine-mediated AAV delivery system successfully induced a physiological response from hNSCs, cellular proliferation by a single-shot of AAV encoding fibroblast growth factor-2 (FGF-2), which is typically achieved by multiple treatments with expensive FGF-2 proteins. By combining the adhesive material-independent surface functionalization characters of pNE and pDA, this new sticky "delivering-from" gene delivery platform will make a significant contribution to numerous fields, including tissue engineering, gene therapy, and stem cell therapy.
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Affiliation(s)
- Eunmi Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University , 50 Yonsei-Ro, Seoul 120-749, Korea
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13
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Glass KA, Link JM, Brunger JM, Moutos FT, Gersbach CA, Guilak F. Tissue-engineered cartilage with inducible and tunable immunomodulatory properties. Biomaterials 2014; 35:5921-31. [PMID: 24767790 DOI: 10.1016/j.biomaterials.2014.03.073] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 03/27/2014] [Indexed: 11/25/2022]
Abstract
The pathogenesis of osteoarthritis is mediated in part by inflammatory cytokines including interleukin-1 (IL-1), which promote degradation of articular cartilage and prevent human mesenchymal stem cell (MSC) chondrogenesis. In this study, we combined gene therapy and functional tissue engineering to develop engineered cartilage with immunomodulatory properties that allow chondrogenesis in the presence of pathologic levels of IL-1 by inducing overexpression of IL-1 receptor antagonist (IL-1Ra) in MSCs via scaffold-mediated lentiviral gene delivery. A doxycycline-inducible vector was used to transduce MSCs in monolayer or within 3D woven PCL scaffolds to enable tunable IL-1Ra production. In the presence of IL-1, IL-1Ra-expressing engineered cartilage produced cartilage-specific extracellular matrix, while resisting IL-1-induced upregulation of matrix metalloproteinases and maintaining mechanical properties similar to native articular cartilage. The ability of functional engineered cartilage to deliver tunable anti-inflammatory cytokines to the joint may enhance the long-term success of therapies for cartilage injuries or osteoarthritis.
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Affiliation(s)
- Katherine A Glass
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Jarrett M Link
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Jonathan M Brunger
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Franklin T Moutos
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA
| | - Charles A Gersbach
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.
| | - Farshid Guilak
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA; Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.
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14
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Scaffold-mediated lentiviral transduction for functional tissue engineering of cartilage. Proc Natl Acad Sci U S A 2014; 111:E798-806. [PMID: 24550481 DOI: 10.1073/pnas.1321744111] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The ability to develop tissue constructs with matrix composition and biomechanical properties that promote rapid tissue repair or regeneration remains an enduring challenge in musculoskeletal engineering. Current approaches require extensive cell manipulation ex vivo, using exogenous growth factors to drive tissue-specific differentiation, matrix accumulation, and mechanical properties, thus limiting their potential clinical utility. The ability to induce and maintain differentiation of stem cells in situ could bypass these steps and enhance the success of engineering approaches for tissue regeneration. The goal of this study was to generate a self-contained bioactive scaffold capable of mediating stem cell differentiation and formation of a cartilaginous extracellular matrix (ECM) using a lentivirus-based method. We first showed that poly-L-lysine could immobilize lentivirus to poly(ε-caprolactone) films and facilitate human mesenchymal stem cell (hMSC) transduction. We then demonstrated that scaffold-mediated gene delivery of transforming growth factor β3 (TGF-β3), using a 3D woven poly(ε-caprolactone) scaffold, induced robust cartilaginous ECM formation by hMSCs. Chondrogenesis induced by scaffold-mediated gene delivery was as effective as traditional differentiation protocols involving medium supplementation with TGF-β3, as assessed by gene expression, biochemical, and biomechanical analyses. Using lentiviral vectors immobilized on a biomechanically functional scaffold, we have developed a system to achieve sustained transgene expression and ECM formation by hMSCs. This method opens new avenues in the development of bioactive implants that circumvent the need for ex vivo tissue generation by enabling the long-term goal of in situ tissue engineering.
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15
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Hu WW, Wang Z, Krebsbach PH. Virus immobilization on biomaterial scaffolds through biotin-avidin interaction for improving bone regeneration. J Tissue Eng Regen Med 2013; 10:E63-72. [PMID: 23798490 DOI: 10.1002/term.1774] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Revised: 04/15/2013] [Accepted: 04/16/2013] [Indexed: 12/14/2022]
Abstract
To spatially control therapeutic gene delivery for potential tissue engineering applications, a biotin-avidin interaction strategy was applied to immobilize viral vectors on biomaterial scaffolds. Both adenoviral vectors and gelatin sponges were biotinylated and avidin was applied to link them in a virus-biotin-avidin-biotin-material (VBABM) arrangement. The tethered viral particles were stably maintained within scaffolds and SEM images illustrated that viral particles were evenly distributed in three-dimensional (3D) gelatin sponges. An in vivo study demonstrated that transgene expression was restricted to the implant sites only and transduction efficiency was improved using this conjugation method. For an orthotopic bone regeneration model, adenovirus encoding BMP-2 (AdBMP2) was immobilized to gelatin sponges before implanting into critical-sized bone defects in rat calvaria. Compared to gelatin sponges with AdBMP2 loaded in a freely suspended form, the VBABM method enhanced gene transfer and bone regeneration was significantly improved. These results suggest that biotin-avidin immobilization of viral vectors to biomaterial scaffolds may be an effective strategy to facilitate tissue regeneration.
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Affiliation(s)
- Wei-Wen Hu
- Department of Biological and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, 48109, USA.,Department of Chemical and Materials Engineering, National Central University, Jhongli City, Taiwan.,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Zhuo Wang
- Department of Biological and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, 48109, USA
| | - Paul H Krebsbach
- Department of Biological and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI, 48109, USA.,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
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16
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A PLG/HAp composite scaffold for lentivirus delivery. Biomaterials 2013; 34:5431-8. [PMID: 23602363 DOI: 10.1016/j.biomaterials.2013.04.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 04/04/2013] [Indexed: 01/08/2023]
Abstract
Gene delivery from tissue engineering scaffolds provides the opportunity to control the microenvironment by inducing expression of regenerative factors. Hydroxyapatite (HAp) nanoparticles can bind lentivirus, and we investigated the incorporation of HAp into poly(lactide-co-glycolide) (PLG) scaffolds in order to retain lentivirus added to the scaffold. PLG/HAp scaffolds loaded with lentivirus enhanced transgene expression over 10-fold in vitro relative to scaffolds without HAp. Following in vivo implantation, PLG/HAp scaffolds promoted transgene expression for more than 100 days, with the level and duration enhanced relative to control scaffolds with lentivirus/HAp complexes added to PLG scaffolds. The extent of HAp incorporated into the scaffold influenced transgene expression, in part through its impact on porous architecture. Expression in vivo was localized to PLG/HAp scaffolds, with macrophages the primary cell type transduced at day 3, yet transduction of neutrophils and dendritic cells was also observed. At day 21 in PLG/HAp scaffolds, non-immune cells were transduced to a greater extent than immune cells, a trend that was opposite results from PLG scaffolds. Thus, in addition to retaining the virus, PLG/HAp influenced cell infiltration and preferentially transduced non-immune cells.
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17
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McConnell KI, Gomez EJ, Suh J. The identity of the cell adhesive protein substrate affects the efficiency of adeno-associated virus reverse transduction. Acta Biomater 2012; 8:4073-9. [PMID: 22771459 DOI: 10.1016/j.actbio.2012.06.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 06/25/2012] [Accepted: 06/27/2012] [Indexed: 11/25/2022]
Abstract
Delivering genes from surfaces, called substrate-mediated gene delivery or reverse transduction, is a useful method to achieve spatial localization of gene delivery. We tested the compatibility of adeno-associated virus (AAV) vectors with various cell adhesive proteins to mediate gene delivery from surfaces. Our studies demonstrate that AAV vectors can be successfully adsorbed on collagen I, elastin, and laminin substrates leading to robust gene delivery to overlying cells. Notably, AAV immobilization on laminin yields the highest efficiency of gene expression. This increased gene expression cannot be explained by increases in the levels of virus deposition, transcriptional activity of cells, or virus vector uptake into cells. Further refinement of our knowledge of AAV interactions with extracellular matrix proteins may have important implications in a variety of applications ranging from tissue engineering to in vivo gene therapy.
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18
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Jang JH, Schaffer DV, Shea LD. Engineering biomaterial systems to enhance viral vector gene delivery. Mol Ther 2011; 19:1407-15. [PMID: 21629221 DOI: 10.1038/mt.2011.111] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Integrating viral gene delivery with engineered biomaterials is a promising strategy to overcome a number of challenges associated with virus-mediated gene delivery, including inefficient delivery to specific cell types, limited tropism, spread of vectors to distant sites, and immune responses. Viral vectors can be combined with biomaterials either through encapsulation within the material or immobilization onto a material surface. Subsequent biomaterial-based delivery can increase the vector's residence time within the target site, thereby potentially providing localized delivery, enhancing transduction, and extending the duration of gene expression. Alternatively, physical or chemical modification of viral vectors with biomaterials can be employed to modulate the tropism of viruses or reduce inflammatory and immune responses, both of which may benefit transduction. This review describes strategies to promote viral gene delivery technologies using biomaterials, potentially providing opportunities for numerous applications of gene therapy to inherited or acquired disorders, infectious disease, and regenerative medicine.
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Affiliation(s)
- Jae-Hyung Jang
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, Korea.
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19
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Blocker KM, Kiick KL, Sullivan MO. Surface immobilization of plasmid DNA with a cell-responsive tether for substrate-mediated gene delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:2739-46. [PMID: 21323317 PMCID: PMC3113645 DOI: 10.1021/la104313z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The advancement of nonviral gene therapy hinges on the ability to exert highly specific spatial and temporal control of gene delivery systems to enable localized release of DNA. In this work, we have developed a system capable of promoting localized delivery of a plasmid by utilizing peptide nucleic acid (PNA) technology to bind DNA to a substrate via an enzymatically labile peptide sequence. The successful immobilization of the DNA to the model substrate as well as the specificity of the binding was confirmed with atomic force microscopy (AFM) and AFM-confocal overlay imaging. Fluorescence-based quantification revealed that surfaces treated with the conjugates had 49 ± 22 ng of DNA/cm(2), while there were 4.2 ± 2.1 ng of DNA/cm(2) on surfaces treated with unfunctionalized DNA. When NIH/3T3 cells were grown on the modified substrates, a significantly higher percentage of cells were transfected when the peptide tether was protease-sensitive as compared with when it was not labile. These results indicated that the peptide must be cleaved to release the DNA. In addition to providing cell-triggered release, this system decouples the properties of the complexation agent and the substrate from the method of immobilization/release to provide a model system that can be tailored to specific applications.
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Affiliation(s)
- Kory M. Blocker
- Department of Chemical Engineering, University of Delaware, 150 Academy Street, Colburn Laboratory, Newark, DE 19716, USA
| | - Kristi L. Kiick
- Department of Materials Science and Engineering, University of Delaware, 201 DuPont Hall, Newark, DE 19716, USA
| | - Millicent O. Sullivan
- Department of Chemical Engineering, University of Delaware, 150 Academy Street, Colburn Laboratory, Newark, DE 19716, USA
- Corresponding author. Address: Department of Chemical Engineering, University of Delaware, 150 Academy Street, Colburn Laboratory, Newark, DE 19716, USA. Tel.: +1 302 831 8072; fax: +1 302 831 1048. (M.O. Sullivan)
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20
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Wang CHK, Pun SH. Substrate-mediated nucleic acid delivery from self-assembled monolayers. Trends Biotechnol 2011; 29:119-26. [PMID: 21208672 DOI: 10.1016/j.tibtech.2010.11.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 11/16/2010] [Accepted: 11/19/2010] [Indexed: 12/12/2022]
Abstract
Substrate-mediated nucleic acid (NA) delivery involves the immobilization of NAs or NA delivery vehicles to biomaterials for localized transfection of cells. Self-assembled monolayers (SAMs) offer an easy system to immobilize delivery vectors. SAMs form well-defined surfaces; therefore, the effect of surface composition on vector immobilization and transfection efficiency can also be studied. To date, the most effective SAM-mediated delivery systems have utilized nonspecific interactions for immobilization; however, systems that rely on specific interactions between vector and surface can impart higher control of spatial and/or temporal delivery. This review summarizes systems that use both specific and nonspecific interactions for gene delivery from SAMs; highlights progress and remaining challenges; and explores other specific recognition modalities that might be employed for future applications in surface-mediated NA delivery.
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Affiliation(s)
- Chung-Huei K Wang
- Department of Bioengineering, University of Washington, 3720 15th Ave NE, Seattle, WA 98195, USA
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21
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Ward BB, Brown SE, Krebsbach PH. Bioengineering strategies for regeneration of craniofacial bone: a review of emerging technologies. Oral Dis 2010; 16:709-16. [PMID: 20534013 DOI: 10.1111/j.1601-0825.2010.01682.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Although advances in surgical techniques and bone grafting have significantly improved the functional and cosmetic restoration of craniofacial structures lost because of trauma or disease, there are still significant limitations in our ability to regenerate these tissues. The regeneration of oral and craniofacial tissues presents a formidable challenge that requires synthesis of basic science, clinical science, and engineering technology. Tissue engineering is an interdisciplinary field of study that addresses this challenge by applying the principles of engineering to biology and medicine toward the development of biological substitutes that restore, maintain, and improve normal function. This review will explore the impact of biomaterials design, stem cell biology and gene therapy on craniofacial tissue engineering.
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Affiliation(s)
- B B Ward
- Department of Oral and Maxillofacial Surgery Biologic and Materials Sciences, School of Dentistry, University of Michigan Ann Arbor, MI, USA
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22
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Wang CHK, Jiang S, Pun SH. Localized cell uptake of His-tagged polyplexes immobilized on NTA self-assembled monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:15445-15452. [PMID: 20831283 DOI: 10.1021/la1025203] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A new method to study substrate-mediated gene delivery was developed using a hexahistidine-tagged polymeric gene delivery vehicle (His-tagged polyplex) and nickel nitrilotriacetic acid (Ni-NTA) self-assembled monolayers (SAMs) on gold surfaces. The His-tagged polyplexes showed specific interaction with Ni-NTA surfaces compared to control surfaces, with increasing NTA content in SAM formulations corresponding to increasing amounts of immobilized His-tagged polypexes on the surface. Cells seeded on NTA SAMs demonstrated uptake of His-tagged polyplexes in the presence of imidazole and EDTA with low cytotoxicity. Cells seeded on NTA SAMs without imidazole and EDTA showed minimal a amount of His-tagged polyplex uptake. This showed that the release of polyplexes from the surface by imidazole and EDTA was necessary for cell uptake. Thus, this system provides potential spatial specificity for polyplex delivery controlled by location of NTA surfaces and temporal specificity for polyplex delivery controlled by the addition of imidazole and EDTA.
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Affiliation(s)
- Chung-Huei K Wang
- Department of Bioengineering, University of Washington, Seattle, Washington 98195, USA
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23
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Rea JC, Gibly RF, Davis NE, Barron AE, Shea LD. Engineering surfaces for substrate-mediated gene delivery using recombinant proteins. Biomacromolecules 2010; 10:2779-86. [PMID: 19775146 DOI: 10.1021/bm900628e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Immobilized fibronectin and other natural proteins have been utilized to enhance substrate-mediated gene delivery, with apparent contributions from the intrinsic bioactivity and also physical properties of the immobilized proteins. In this report, we investigated the use of recombinant proteins, compared to the full-length fibronectin protein, as surface coatings for gene delivery to investigate the mechanisms by which fibronectin enhances gene transfer. The recombinant fibronectin fragment FNIII(7-10) (FNIII) contains the alpha(5)beta(1) binding domain of fibronectin and supports cell adhesion, whereas the recombinant protein polymer PP-12 is also negatively charged and has a molecular weight similar to FNIII, but lacks cell binding domains. Transfection was compared on surfaces modified with FNIII, full-length fibronectin, or PP-12. The full-length fibronectin provided the greatest extent of transgene expression relative to FNIII or PP-12, which was consistent with the amount of DNA that associated with cells. FNIII had 4.2-fold or 4.7-fold lower expression levels relative to fibronectin for polyplexes and lipoplexes, respectively. PP-12 produced expression levels that were 317-fold and 12.0-fold less than fibronectin for polyplexes and lipoplexes, respectively. Although expression was greater on FNIII relative to PP-12, the levels of DNA associated per cell with FNIII were similar to or less than those with PP-12, suggesting that the bioactive sequences may contribute to an enhanced intracellular trafficking. For lipoplexes delivered on FNIII, the efficiency of intracellular trafficking and levels of caveolar DNA were greater than that observed with either the full-length fibronectin or PP-12. For polyplexes, fibronectin fragment resulted in greater intracellular trafficking efficiency compared to PP-12 protein polymer. Recombinant proteins can be employed in place of full-length extracellular matrix proteins for substrate-mediated gene delivery, and bioactive sequences can influence one or more steps in the gene delivery process to maximize transfection.
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Affiliation(s)
- Jennifer C Rea
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, USA
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24
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Liao IC, Chen S, Liu JB, Leong KW. Sustained viral gene delivery through core-shell fibers. J Control Release 2009; 139:48-55. [PMID: 19539680 DOI: 10.1016/j.jconrel.2009.06.007] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2009] [Revised: 06/08/2009] [Accepted: 06/10/2009] [Indexed: 12/18/2022]
Abstract
Although viral gene transfer is efficient in achieving transgene expression for tissue engineering, drawbacks of virus dissemination, toxicity and transient gene expression due to immune response have hindered its widespread application. Many tissue engineering studies thus opt to genetically engineer cells in vitro prior to their introduction in vivo. However, it would be attractive to obviate the need for in vitro manipulation by transducing the infiltrating progenitor cells in situ. This study introduces the fabrication of a virus-encapsulated electrospun fibrous scaffold to achieve sustained and localized transduction. Adenovirus encoding the gene for green fluorescent protein was efficiently encapsulated into the core of poly(epsilon-caprolactone) fibers through co-axial electrospinning and was subsequently released via a porogen-mediated process. HEK 293 cells seeded on the scaffolds expressed high level of transgene expression over a month, while cells inoculated by scaffold supernatant showed only transient expression for a week. RAW 264.7 cells cultured on the virus-encapsulated fibers produced a lower level of IL-1 beta, TNF-alpha and IFN-alpha, suggesting that the activation of macrophage cells by the viral vector was reduced when encapsulated in the core-shell PCL fibers. In demonstrating sustained and localized cell transduction, this study presents an attractive alternative mode of applying viral gene transfer for regenerative medicine.
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Affiliation(s)
- I-Chien Liao
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
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25
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Peckys DB, Melechko AV, Simpson ML, McKnight TE. Immobilization and release strategies for DNA delivery using carbon nanofiber arrays and self-assembled monolayers. NANOTECHNOLOGY 2009; 20:145304. [PMID: 19420523 DOI: 10.1088/0957-4484/20/14/145304] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report a strategy for immobilizing dsDNA (double-stranded DNA) onto vertically aligned carbon nanofibers and subsequently releasing this dsDNA following penetration and residence of these high aspect ratio structures within cells. Gold-coated nanofiber arrays were modified with self-assembled monolayers (SAM) to which reporter dsDNA was covalently and end-specifically bound with or without a cleavable linker. The DNA-modified nanofiber arrays were then used to impale, and thereby transfect, Chinese hamster lung epithelial cells. This mechanical approach enables the transport of bound ligands directly into the cell nucleus and consequently bypasses extracellular and cytosolic degradation. Statistically significant differences were observed between the expression levels from immobilized and releasable DNA, and these are discussed in relation to the distinct accessibility and mode of action of glutathione, an intracellular reducing agent responsible for releasing the bound dsDNA. These results prove for the first time that an end-specifically and covalently SAM-bound DNA can be expressed in cells. They further demonstrate how the choice of immobilization and release methods can impact expression of nanoparticle delivered DNA.
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Affiliation(s)
- Diana B Peckys
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6030, USA.
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26
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Cresce AVW, Dandu R, Burger A, Cappello J, Ghandehari H. Characterization and real-time imaging of gene expression of adenovirus embedded silk-elastinlike protein polymer hydrogels. Mol Pharm 2008; 5:891-7. [PMID: 18763804 DOI: 10.1021/mp800054w] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Transient expression levels, vector dissemination and toxicities associated with adenoviral vectors have prompted the usage of matrices for localized and controlled gene delivery. Two recombinant silk-elastinlike protein polymer analogues, SELP-47K and SELP-415K, consisting of different lengths and ratios of silk and elastin units, were previously shown to be injectable hydrogels capable of matrix-mediated controlled adenoviral gene delivery. Reported here is a study of spatiotemporal control over adenoviral gene expression with these SELP analogues in a human tumor xenograft model of head and neck cancer using whole animal imaging. Real-time images of viral expression levels indicate that polymer concentration and polymer structure are predominant factors that affect viral release and, thus, viral transfection. Decrease in polymer concentration and increase in polymer elastin content results in greater release, probably due to changes in the network structure of the hydrogel. To better understand this relationship, macro- and microstructural properties of the hydrogels were analyzed using dynamic mechanical analysis (DMA) and transmission electron microscopy (TEM). The results confirm that the concentration and the elastin content of the protein polymer affect the pore size of the hydrogel by changing the physical constraints of the SELP fibril network and the degree of hydration of the SELP fibrils. The potential to modulate viral release using SELP hydrogel delivery vehicles that can be injected intratumorally by minimally invasive techniques holds significant promise for the delivery of therapeutic viruses.
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Affiliation(s)
- Arthur von Wald Cresce
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Baltimore, Maryland, USA
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27
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Polyethyleneimine-mediated gene delivery into human adipose derived stem cells. Biomaterials 2008; 29:2415-22. [DOI: 10.1016/j.biomaterials.2008.02.006] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2007] [Accepted: 02/01/2008] [Indexed: 12/25/2022]
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