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Zhou H, He Y, Xiong W, Jing S, Duan X, Huang Z, Nahal GS, Peng Y, Li M, Zhu Y, Ye Q. MSC based gene delivery methods and strategies improve the therapeutic efficacy of neurological diseases. Bioact Mater 2023; 23:409-437. [PMCID: PMC9713256 DOI: 10.1016/j.bioactmat.2022.11.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/08/2022] [Accepted: 11/13/2022] [Indexed: 12/05/2022] Open
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Lin Z, Fan D, Li G, He L, Qin X, Zhao B, Wang Q, Liang W. Antibacterial, Adhesive, and Conductive Hydrogel for Diabetic Wound Healing. Macromol Biosci 2023; 23:e2200349. [PMID: 36333912 DOI: 10.1002/mabi.202200349] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 10/25/2022] [Indexed: 11/06/2022]
Abstract
Diabetic mellitus is one of the leading causes of chronic wounds and remains a challenging issue to be resolved. Herein, a hydrogel with conformal tissue adhesivity, skin-like conductivity, robust mechanical characteristics, as well as active antibacterial function is developed. In this hydrogel, silver nanoparticles decorated polypyrrole nanotubes (AgPPy) and cobalt ions (Co2+ ) are introduced into an in situ polymerized poly(acrylic acid) (PAA) and branched poly(ethylenimine) (PEI) network (PPCA hydrogel). The PPCA hydrogel provides active antibacterial function through synergic effects from protonated PEI and AgPPy nanotubes, with a tissue-like mechanical property (≈16.8 ± 4.5 kPa) and skin-like electrical conductivity (≈0.048 S m-1 ). The tensile and shear adhesive strength (≈15.88 and ≈12.76 kPa, respectively) of the PPCA hydrogel is about two- to threefold better than that of fibrin glue. In vitro studies show the PPCA hydrogel is highly effective against both gram-positive and gram-negative bacteria. In vivo results demonstrate that the PPCA hydrogel promotes diabetic wounds with accelerated healing, with notable inflammatory reduction and prominent angiogenesis regeneration. These results suggest the PPCA hydrogel provide a promising approach to promote diabetic wound healing.
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Affiliation(s)
- Zhicong Lin
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Donghao Fan
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Guojiao Li
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Liming He
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Xianyan Qin
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Bin Zhao
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Qin Wang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
| | - Wenlang Liang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education and School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China
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Zhang K, Sun Q, Bai X, Liu P, Lyu Z, Li Q, Li A. Preparation and Performance Study of COS/PEI@PolyI:C/OVA Nanocomposite Using the Blend System of Chitooligosaccharide and Polyethyleneimine as a Drug Carrier. Macromol Res 2021. [DOI: 10.1007/s13233-021-9089-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Yoshitomi T, Karita H, Mori-Moriyama N, Sato N, Yoshimoto K. Reduced cytotoxicity of polyethyleneimine by covalent modification of antioxidant and its application to microalgal transformation. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2021; 22:864-874. [PMID: 34658670 PMCID: PMC8519552 DOI: 10.1080/14686996.2021.1978273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
The conversion of carbon dioxide into valuable chemicals is an effective strategy for combating augmented concentrations of carbon dioxide in the environment. Microalgae photosynthetically produce valuable chemicals that are used as biofuels, sources for industrial materials, medicinal leads, and food additives. Thus, improvements in microalgal technology via genetic engineering may prove to be promising for the tailored production of novel metabolites. For the transformation of microalgae, nucleic acids such as plasmid DNA (pDNA) are delivered into the cells using physical and mechanical techniques, such as electroporation, bombardment with DNA-coated microprojectiles, and vortexing with glass beads. However, owing to the electrostatic repulsion between negatively charged cell walls and nucleic acids, the delivery of nucleic acids into the microalgal cells is challenging. To solve this issue, in this study, we investigated microalgal transformation via electroporation using polyplexes with linear polyethyleneimine (LPEI) and pDNA. However, the high toxicity of LPEI decreased the transformation efficiency in Chlamydomonas reinhardtii cells. We revealed that the toxicity of LPEI was due to oxidative stress resulting from the cellular uptake of LPEI. To suppress the toxicity of LPEI, an antioxidant, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), was covalently conjugated with LPEI; the conjugate was named as TEMPO-LPEI. Interestingly, with a cellular uptake tendency similar to that of LPEI, TEMPO-LPEI dramatically decreased oxidative stress and cytotoxicity. Electroporation using polyplexes of TEMPO-LPEI and pDNA enhanced the transformation efficiency, compared to those treated with bare pDNA and polyplexes of LPEI/pDNA. This result indicates that polycations conjugated with antioxidants could be useful in facilitating microalgal transformation.
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Affiliation(s)
- Toru Yoshitomi
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
- Research Center for Functional Materials, National Institute for Materials Science, Ibaraki, Japan
| | - Haruka Karita
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Natsumi Mori-Moriyama
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Naoki Sato
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Keitaro Yoshimoto
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
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Oishi K, Morise M, Vo LK, Tran NT, Sahashi D, Ueda-Wakamatsu R, Nishimura W, Komatsu M, Shiozaki K. Host lactosylceramide enhances Edwardsiella tarda infection. Cell Microbiol 2021; 23:e13365. [PMID: 33988901 DOI: 10.1111/cmi.13365] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/01/2021] [Accepted: 05/10/2021] [Indexed: 12/01/2022]
Abstract
Edwardsiella tarda is a Gram-negative bacterium causing economic damage in aquaculture. The interaction of E. tarda with microdomains is an important step in the invasion, but the target molecules in microdomains remain undefined. Here, we found that intraperitoneal injection of E. tarda altered splenic glycosphingolipid patterns in the model host medaka (Oryzias latipes) accompanied by alteration of glycosphingolipid metabolism-related gene expressions, suggesting that glycosphingolipid levels are involved in E. tarda infection. To ascertain the significance of glycosphingolipids in the infection, fish cell lines, DIT29 cells with a high amount of lactosylceramide (LacCer) and glucosylceramide (GlcCer), and GAKS cells with a low amount of these lipids, were treated with methyl-β-cyclodextrin to disrupt the microdomain. E. tarda infection was suppressed in DIT29 cells, but not in GAKS cells, suggesting the involvement of microdomain LacCer and GlcCer in the infection. DL-threo-1-phenyl-2-palmitoylamino-3-morpholino-1-propanol, an inhibitor of glycosphingolipid-synthesis, attenuated the infection in DIT29 cells, while Neu3-overexpressing GAKS cells, which accumulated LacCer, enhanced the infection. E. tarda possessed binding ability towards LacCer, but not GlcCer, and LacCer preincubation declined the infection towards fish cells, possibly due to the masking of binding sites. The present study suggests that LacCer may be a positive regulator of E. tarda invasion.
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Affiliation(s)
- Kazuki Oishi
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - Moeri Morise
- Faculty of Fisheries, Kagoshima University, Kagoshima, Japan
| | - Linh Khanh Vo
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan
| | - Nhung Thi Tran
- Faculty of Fisheries, Kagoshima University, Kagoshima, Japan
| | - Daichi Sahashi
- Faculty of Fisheries, Kagoshima University, Kagoshima, Japan
| | | | | | - Masaharu Komatsu
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan.,Faculty of Fisheries, Kagoshima University, Kagoshima, Japan
| | - Kazuhiro Shiozaki
- The United Graduate School of Agricultural Sciences, Kagoshima University, Kagoshima, Japan.,Faculty of Fisheries, Kagoshima University, Kagoshima, Japan
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Laiva AL, O'Brien FJ, Keogh MB. SDF-1α gene-activated collagen scaffold enhances provasculogenic response in a coculture of human endothelial cells with human adipose-derived stromal cells. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:26. [PMID: 33677751 PMCID: PMC7936958 DOI: 10.1007/s10856-021-06499-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 02/17/2021] [Indexed: 05/06/2023]
Abstract
Novel biomaterials can be used to provide a better environment for cross talk between vessel forming endothelial cells and wound healing instructor stem cells for tissue regeneration. This study seeks to investigate if a collagen scaffold containing a proangiogenic gene encoding for the chemokine stromal-derived factor-1 alpha (SDF-1α GAS) could be used to enhance functional responses in a coculture of human umbilical vein endothelial cells (HUVECs) and human adipose-derived stem/stromal cells (ADSCs). Functional responses were determined by (1) monitoring the amount of junctional adhesion molecule VE-cadherin released during 14 days culture, (2) expression of provasculogenic genes on the 14th day, and (3) the bioactivity of secreted factors on neurogenic human Schwann cells. When we compared our SDF-1α GAS with a gene-free scaffold, the results showed positive proangiogenic determination characterized by a transient yet controlled release of the VE-cadherin. On the 14th day, the coculture on the SDF-1α GAS showed enhanced maturation than its gene-free equivalent through the elevation of provasculogenic genes (SDF-1α-7.4-fold, CXCR4-1.5-fold, eNOS-1.5-fold). Furthermore, we also found that the coculture on SDF-1α GAS secretes bioactive factors that significantly (p < 0.01) enhanced human Schwann cells' clustering to develop toward Bünger band-like structures. Conclusively, this study reports that SDF-1α GAS could be used to produce a bioactive vascularized construct through the enhancement of the cooperative effects between endothelial cells and ADSCs.
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Affiliation(s)
- Ashang L Laiva
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland
- Department of Biomedical Science, Royal College of Surgeons in Ireland, Adliya, Bahrain
| | - Fergal J O'Brien
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
- Advanced Materials and Bioengineering Research Centre, Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland
| | - Michael B Keogh
- Tissue Engineering Research Group, Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland.
- Department of Biomedical Science, Royal College of Surgeons in Ireland, Adliya, Bahrain.
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Liu C, Xie Y, Li X, Yao X, Wang X, Wang M, Li Z, Cao F. Folic Acid/Peptides Modified PLGA-PEI-PEG Polymeric Vectors as Efficient Gene Delivery Vehicles: Synthesis, Characterization and Their Biological Performance. Mol Biotechnol 2021; 63:63-79. [PMID: 33141343 DOI: 10.1007/s12033-020-00285-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2020] [Indexed: 01/08/2023]
Abstract
Polymeric vectors are safer alternatives for gene delivery owing to their advantages as compared to viral vectors. To improve the stability and transfection efficiency of poly(lactic-co-glycolic acid) (PLGA)- and poly(ethylenimine) (PEI)-based vectors, poly(ethylene glycol) (PEG), folic acid (FA), arginylglycylaspartic acid (RGD) peptides and isoleucine-lysine-valine-alanine-valine (IKVAV) peptides were employed and PLGA-PEI-PEG-FA and PLGA-PEI-PEG-RGD copolymers were synthesized. PLGA-PEI-PEG-FA/DNA, PLGA-PEI-PEG-RGD/DNA and PLGA-PEI-PEG-RGD/IKVAV/DNA nanocomplexes (NCs) were formed through bulk mixing. The structure and properties, including morphology, particle size, surface charge and DNA encapsulation, of NCs were studied. Robust NCs with spherical shape, uniform size distribution and slightly positive charge were able to completely bind DNA above their respective N/P ratios. The critical N/P ratio for PLGA-PEI-PEG-FA/DNA, PLGA-PEI-PEG-RGD/DNA and PLGA-PEI-PEG-RGD/IKVAV/DNA NCs was identified to be 12:1, 8:1 and 10:1, respectively. The covalent modification of PEI through a combination of biodegradable PLGA, hydrophilic PEG and targeting motifs significantly decreased the cytotoxicity of PEI. The developed NCs showed both N/P ratio and cell type-dependent transfection efficiency. An increase in N/P ratio resulted in increased transfection efficiency, and much improved transfection efficiency of NCs was observed above their respective critical N/P ratios. This study provides a promising means to produce polymeric vectors for gene delivery.
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Affiliation(s)
- Chaoyu Liu
- Department of Research and Development, Shiningbiotek Co., Ltd, Shenzhen, 518055, People's Republic of China
| | - Yuancai Xie
- Department of Thoracic, Peking University Shenzhen Hospital, Shenzhen, 518036, People's Republic of China
| | - Xiaohua Li
- Department of Research and Development, Shiningbiotek Co., Ltd, Shenzhen, 518055, People's Republic of China
| | - Xumei Yao
- Department of Research and Development, Shiningbiotek Co., Ltd, Shenzhen, 518055, People's Republic of China
| | - Xuanbin Wang
- Laboratory of Chinese Herbal Pharmacology, Oncology Center, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Shiyan, 442000, People's Republic of China
| | - Min Wang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China
| | - Zongxian Li
- Department of Oncology, Weihai Central Hospital, Weihai, People's Republic of China.
| | - Fengjun Cao
- Laboratory of Chinese Herbal Pharmacology, Oncology Center, Renmin Hospital, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.
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8
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Wang M, Xin Y, Cao H, Li W, Hua Y, Webster TJ, Zhang C, Tang W, Liu Z. Recent advances in mesenchymal stem cell membrane-coated nanoparticles for enhanced drug delivery. Biomater Sci 2020; 9:1088-1103. [PMID: 33332490 DOI: 10.1039/d0bm01164a] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Studies of nanomedicine have achieved dramatic progress in recent decades. However, the main challenges that traditional nanomedicine has to overcome include low accumulation at target sites and rapid clearance from the blood circulation. An interesting approach using cell membrane coating technology has emerged as a possible way to overcome these limitations, owing to the enhanced targeted delivery and reduced immunogenicity of cell membrane moieties. Mesenchymal stem cell (MSC) therapy has been investigated for treating various diseases, ranging from inflammatory diseases to tissue damage. Recent studies with engineered modified MSCs or MSC membranes have focused on enhancing cell therapeutic efficacy. Therefore, bioengineering strategies that couple synthetic nanoparticles with MSC membranes have recently received much attention due to their homing ability and tumor tropism. Given the various membrane receptors on their surfaces, MSC membrane-coated nanoparticles are an effective method with selective targeting properties, allowing entry into specific cells. Here, we review recent progress on the use of MSC membrane-coated nanoparticles for biomedical applications, particularly in the two main antitumor and anti-inflammatory fields. The combination of a bioengineered cell membrane and synthesized nanoparticles presents a wide range of possibilities for the further development of targeted drug delivery, showing the potential to enhance the therapeutic efficacy for treating various diseases.
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Affiliation(s)
- Mian Wang
- Department of Cardiology, Research Center for Translational Medicine, Translational Medical Center for Stem Cell Therapy and Institute for Regenerative Medicine, Shanghai East Hospital, School of Medicine, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai, China.
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9
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Song J, Wang D, Wang J, Shen Q, Xie C, Lu W, Wang R, Liu M. Low molecular weight polyethyleneimine modified by 2-aminoimidazole achieving excellent gene transfection efficiency. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.110017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Efficient Non-Viral Gene Modification of Mesenchymal Stromal Cells from Umbilical Cord Wharton's Jelly with Polyethylenimine. Pharmaceutics 2020; 12:pharmaceutics12090896. [PMID: 32971730 PMCID: PMC7559368 DOI: 10.3390/pharmaceutics12090896] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 12/22/2022] Open
Abstract
Mesenchymal stromal cells (MSC) derived from human umbilical cord Wharton’s jelly (WJ) have a wide therapeutic potential in cell therapy and tissue engineering because of their multipotential capacity, which can be reinforced through gene therapy in order to modulate specific responses. However, reported methodologies to transfect WJ-MSC using cationic polymers are scarce. Here, WJ-MSC were transfected using 25 kDa branched- polyethylenimine (PEI) and a DNA plasmid encoding GFP. PEI/plasmid complexes were characterized to establish the best transfection efficiencies with lowest toxicity. Expression of MSC-related cell surface markers was evaluated. Likewise, immunomodulatory activity and multipotential capacity of transfected WJ-MSC were assessed by CD2/CD3/CD28-activated peripheral blood mononuclear cells (PBMC) cocultures and osteogenic and adipogenic differentiation assays, respectively. An association between cell number, PEI and DNA content, and transfection efficiency was observed. The highest transfection efficiency (15.3 ± 8.6%) at the lowest toxicity was achieved using 2 ng/μL DNA and 3.6 ng/μL PEI with 45,000 WJ-MSC in a 24-well plate format (200 μL). Under these conditions, there was no significant difference between the expression of MSC-identity markers, inhibitory effect on CD3+ T lymphocytes proliferation and osteogenic/adipogenic differentiation ability of transfected WJ-MSC, as compared with non-transfected cells. These results suggest that the functional properties of WJ-MSC were not altered after optimized transfection with PEI.
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Hamann A, Kozisek T, Broad K, Pannier AK. Glucocorticoid Priming of Nonviral Gene Delivery to hMSCs Increases Transfection by Reducing Induced Stresses. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2020; 18:713-722. [PMID: 32913879 PMCID: PMC7452153 DOI: 10.1016/j.omtm.2020.07.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 07/17/2020] [Indexed: 12/12/2022]
Abstract
Human mesenchymal stem cells (hMSCs) are under study for cell and gene therapeutics because of their immunomodulatory and regenerative properties. Safe and efficient gene delivery could increase hMSC clinical potential by enabling expression of transgenes for control over factor production, behavior, and differentiation. Viral delivery is efficient but suffers from safety issues, while nonviral methods are safe but highly inefficient, especially in hMSCs. We previously demonstrated that priming cells with glucocorticoids (Gcs) before delivery of DNA complexes significantly increases hMSC transfection, which correlates with a rescue of transfection-induced metabolic and protein synthesis decline, and apoptosis. In this work, we show that transgene expression enhancement is mediated by transcriptional activation of endogenous hMSC genes by the cytosolic glucocorticoid receptor (cGR) and that transfection enhancement can be potentiated with a GR transcription-activation synergist. We demonstrate that the Gc-activated cGR modulates endogenous hMSC gene expression to ameliorate transfection-induced endoplasmic reticulum (ER) and oxidative stresses, apoptosis, and inflammatory responses to prevent hMSC metabolic and protein synthesis decline, resulting in enhanced transgene expression after nonviral gene delivery to hMSCs. These results provide insights important for rational design of more efficient nonviral gene delivery and priming techniques that could be utilized for clinical hMSC applications.
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Affiliation(s)
- Andrew Hamann
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583-0726, USA
| | - Tyler Kozisek
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583-0726, USA
| | - Kelly Broad
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583-0726, USA
| | - Angela K Pannier
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583-0726, USA
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12
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Hamann A, Thomas AK, Kozisek T, Farris E, Lück S, Zhang Y, Pannier AK. Screening a chemically defined extracellular matrix mimetic substrate library to identify substrates that enhance substrate-mediated transfection. Exp Biol Med (Maywood) 2020; 245:606-619. [PMID: 32183552 DOI: 10.1177/1535370220913501] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Nonviral gene delivery, though limited by inefficiency, has extensive utility in cell therapy, tissue engineering, and diagnostics. Substrate-mediated gene delivery (SMD) increases efficiency and allows transfection at a cell-biomaterial interface, by immobilizing and concentrating nucleic acid complexes on a surface. Efficient SMD generally requires substrates to be coated with serum or other protein coatings to mediate nucleic acid complex immobilization, as well as cell adhesion and growth; however, this strategy limits reproducibility and may be difficult to translate for clinical applications. As an alternative, we screened a chemically defined combinatorial library of 20 different extracellular matrix mimetic substrates containing combinations of (1) different sulfated polysaccharides that are essential extracellular matrix glycosaminoglycans (GAGs), with (2) mimetic peptides derived from adhesion proteins, growth factors, and cell-penetrating domains, for use as SMD coatings. We identified optimal substrates for DNA lipoplex and polyplex SMD transfection of fibroblasts and human mesenchymal stem cells. Optimal extracellular matrix mimetic substrates varied between cell type, donor source, and transfection reagent, but typically contained Heparin GAG and an adhesion peptide. Multiple substrates significantly increased transgene expression (i.e. 2- to 20-fold) over standard protein coatings. Considering previous research of similar ligands, we hypothesize extracellular matrix mimetic substrates modulate cell adhesion, proliferation, and survival, as well as plasmid internalization and trafficking. Our results demonstrate the utility of screening combinatorial extracellular matrix mimetic substrates for optimal SMD transfection towards application- and patient-specific technologies. Impact statement Substrate-mediated gene delivery (SMD) approaches have potential for modification of cells in applications where a cell-material interface exists. Conventional SMD uses ill-defined serum or protein coatings to facilitate immobilization of nucleic acid complexes, cell attachment, and subsequent transfection, which limits reproducibility and clinical utility. As an alternative, we screened a defined library of extracellular matrix mimetic substrates containing combinations of different glycosaminoglycans and bioactive peptides to identify optimal substrates for SMD transfection of fibroblasts and human mesenchymal stem cells. This strategy could be utilized to develop substrates for specific SMD applications in which variability exists between different cell types and patient samples.
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Affiliation(s)
- Andrew Hamann
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Alvin K Thomas
- B CUBE - Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Tatzberg 41, Dresden 01307, Germany
| | - Tyler Kozisek
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Eric Farris
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - Steffen Lück
- B CUBE - Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Tatzberg 41, Dresden 01307, Germany
| | - Yixin Zhang
- B CUBE - Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Tatzberg 41, Dresden 01307, Germany
| | - Angela K Pannier
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
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Yi SW, Park JS, Kim HJ, Lee JS, Woo DG, Park KH. Multiply clustered gold-based nanoparticles complexed with exogenous pDNA achieve prolonged gene expression in stem cells. Theranostics 2019; 9:5009-5019. [PMID: 31410198 PMCID: PMC6691390 DOI: 10.7150/thno.34487] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/19/2019] [Indexed: 12/13/2022] Open
Abstract
Development of a stable and prolonged gene delivery system is a key goal in the gene therapy field. To this end, we designed and fabricated a gene delivery system based on multiply-clustered gold particles that could achieve prolonged gene delivery in stem cells, leading to improved induction of differentiation. Methods: Inorganic gold nanoparticles (AuNPs) underwent three rounds of complexation with catechol-functionalized polyethyleneimine (CPEI) and plasmid DNAs (pDNAs), in that order, with addition of heparin (HP) between rounds, yielding multiply-clustered gold-based nanoparticles (mCGNPs). Via metal-catechol group interactions, the AuNP surface was easily coordinated with positively charged CPEIs, which in turn allowed binding of pDNAs. Results: Negatively charged HP was encapsulated with the positive charge of CPEIs via electrostatic interactions, making the NPs more compact. Repeating the complexation process yielded mCGNPs with improved transfection efficiency in human mesenchymal stem cells (hMSCs); moreover, these particles exhibited lower cytotoxicity and longer expression of pDNAs than conventional NPs. This design was applied to induction of chondrogenesis in hMSCs using pDNA harboring SOX9, an important chondrogenic transcription factor. Prolonged expression of SOX9 induced by mCGNPs triggered expression of chondrocyte extracellular matrix (ECM) protein after 14 days, leading to more efficient chondrogenic differentiation in vitro and in vivo.
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Sahel DK, Mittal A, Chitkara D. CRISPR/Cas System for Genome Editing: Progress and Prospects as a Therapeutic Tool. J Pharmacol Exp Ther 2019; 370:725-735. [DOI: 10.1124/jpet.119.257287] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 05/20/2019] [Indexed: 12/11/2022] Open
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15
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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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16
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Bolandi Z, Hosseini Rad SMA, Soudi S, Hashemi SM, Ghanbarian H. A simple and highly efficient method for transduction of human adipose-derived mesenchymal stem cells. J Cell Biochem 2019; 120:1726-1734. [PMID: 30362601 DOI: 10.1002/jcb.27453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 07/13/2018] [Indexed: 01/24/2023]
Abstract
Mesenchymal stem cells (MSCs) are multipotent cells capable of differentiating into a wide range of cell types and provide a potential to transfer therapeutic protein in vivo, making them valuable candidates for gene therapy and cell therapy. However, using MSCs in in vivo is limited due to the low rate of transfection and transduction efficacy. Therefore, developing methods to efficiently transfer genes into MSCs would provide a number of opportunities for using them in the clinic. Here, we introduce a simple and robust method for efficient transduction of human adipose-derived MSCs by modification under the culture condition of human embryonic kidney cells 293 (HEK293T) and MSCs. Moreover, as a transduction enhancer, polybrene was replaced with Lipofectamine, a cationic lipid. Therefore, we showed that transduction of primary cells can be increased efficiently by modifying the culture condition.
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Affiliation(s)
- Zohreh Bolandi
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Sara Soudi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Seyed Mahmoud Hashemi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hossein Ghanbarian
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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17
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Hamann A, Broad K, Nguyen A, Pannier AK. Mechanisms of unprimed and dexamethasone-primed nonviral gene delivery to human mesenchymal stem cells. Biotechnol Bioeng 2018; 116:427-443. [PMID: 30450542 PMCID: PMC6322959 DOI: 10.1002/bit.26870] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/10/2018] [Accepted: 11/16/2018] [Indexed: 12/16/2022]
Abstract
Human mesenchymal stem cells (hMSCs) are under intense study for applications of cell and gene therapeutics because of their unique immunomodulatory and regenerative properties. Safe and efficient genetic modification of hMSCs could increase their clinical potential by allowing functional expression of therapeutic transgenes or control over behavior and differentiation. Viral gene delivery is efficient, but suffers from safety issues, while nonviral methods are safe, but highly inefficient, especially in hMSCs. Our lab previously demonstrated that priming cells before delivery of DNA complexes with dexamethasone (DEX), an anti‐inflammatory glucocorticoid drug, significantly increases hMSC transfection success. This work systematically investigates the mechanisms of hMSC transfection and DEX‐mediated enhancement of transfection. Our results show that hMSC transfection and its enhancement by DEX are decreased by inhibiting classical intracellular transport and nuclear import pathways, but DEX transfection priming does not increase cellular or nuclear internalization of plasmid DNA (pDNA). We also show that hMSC transgene expression is largely affected by pDNA promoter and enhancer sequence changes, but DEX‐mediated enhancement of transfection is unaffected by any pDNA sequence changes. Furthermore, DEX‐mediated transfection enhancement is not the result of increased transgene messenger RNA transcription or stability. However, DEX‐priming increases total protein synthesis by preventing hMSC apoptosis induced by transfection, resulting in increased translation of transgenic protein. DEX may also promote further enhancement of transgenic reporter enzyme activity by other downstream mechanisms. Mechanistic studies of nonviral gene delivery will inform future rationally designed technologies for safe and efficient genetic modification of clinically relevant cell types.
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Affiliation(s)
- Andrew Hamann
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska
| | - Kelly Broad
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska
| | - Albert Nguyen
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska
| | - Angela K Pannier
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska
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18
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Controlled Non-Viral Gene Delivery in Cartilage and Bone Repair: Current Strategies and Future Directions. ADVANCED THERAPEUTICS 2018. [DOI: 10.1002/adtp.201800038] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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19
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Pro-angiogenic impact of SDF-1α gene-activated collagen-based scaffolds in stem cell driven angiogenesis. Int J Pharm 2018; 544:372-379. [PMID: 29555441 DOI: 10.1016/j.ijpharm.2018.03.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 02/19/2018] [Accepted: 03/15/2018] [Indexed: 12/22/2022]
Abstract
Ensuring an adequate angiogenic response during wound healing is a prevailing clinical challenge in biomaterials science. To address this, we aimed to develop a pro-angiogenic gene-activated scaffold (GAS) that could activate MSCs to produce paracrine factors and influence angiogenesis and wound repair. A non-viral polyethyleneimine (PEI) nanoparticles carrying a gene encoding for stromal derived factor-1 alpha (SDF-1α) was combined with a collagen-chondroitin sulfate scaffold to produce the GAS. The ability of this platform to enhance the angiogenic potential of mesenchymal stem cells (MSCs) was then assessed. We found that the MSCs on GAS exhibited early over-expression of SDF-1α mRNA with the activation of angiogenic markers VEGF and CXCR4. Exposing endothelial cells to conditioned media collected from GAS supported MSCs promoted a 20% increase in viability and 33% increase in tubule formation (p < 0.05). Furthermore, the conditioned media promoted a 50% increase in endothelial cell migration and wound closure (p < 0.005). Gene expression analysis of the endothelial cells revealed that the functional response was associated with up-regulation of angiogenic genes; VEGF, CXCR4, eNOS and SDF-1α. Overall, this study shows collagen-based scaffolds combined with SDF-1α gene therapy can provide enhanced pro-angiogenic response, suggesting a promising approach to overcome poor vasculature during wound healing.
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Chiu HW, Su YC, Hong JR. Betanodavirus B2 protein triggers apoptosis and necroptosis in lung cancer cells that suppresses autophagy. Oncotarget 2017; 8:94129-94141. [PMID: 29212215 PMCID: PMC5706861 DOI: 10.18632/oncotarget.21588] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 09/21/2017] [Indexed: 11/25/2022] Open
Abstract
The betanodavirus B2 protein targets the mitochondria and acts as a "death factor", but its effect on lung cancer cells is unknown. We examined the effect of the B2 protein on triggering apoptosis or necroptosis via P53-dependent and P53-independent pathways and increased in suppression of autophagy. The B2 protein targets the mitochondria of A549 (P53+/+) and H1299 (P53-/-) lung cancer cells due to a specific signal sequence (41RTFVISAHAA50). This triggers generation of reactive oxygen species within the mitochondria, and a minor stress response in A549 cells, but a strong stress response in H1299 cells. We examined the molecular mechanism of this cell death pathway, and found that B2 protein induces the P53/Bax-mediated apoptotic pathway in A549 cells, and that a P53 specific inhibitor (pifithrin-α) switches this response to RIP3-mediated necroptosis. On the other hand, B2 induces RIP3-mediated necroptosis pathway in H1299 cells, and a necroptosis inhibitor (necrostatin-1) switches this response to the apoptotic pathway. Both types of cell death signals inhibited autophagy via a tightly increased balance of beclin-1 and Bcl-2. Thus, B2 protein triggers P53-dependent apoptosis in A549 cells and ROS/RIP3-mediated necroptosis in H1299 cells, and crosstalk of these pathways limits initiation of autophagy. These findings provide new insights into the possible control and treatment of lung cancer.
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Affiliation(s)
- Hsuan-Wen Chiu
- Department of Biotechnology and Bioindustry, Laboratory of Molecular Virology and Biotechnology, Institute of Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Yu-Chin Su
- Department of Biotechnology and Bioindustry, Laboratory of Molecular Virology and Biotechnology, Institute of Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
| | - Jiann-Ruey Hong
- Department of Biotechnology and Bioindustry, Laboratory of Molecular Virology and Biotechnology, Institute of Biotechnology, National Cheng Kung University, Tainan 701, Taiwan
- Department of Biotechnology and Bioindustry, National Cheng Kung University, Tainan 701, Taiwan
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21
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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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22
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Liu Q, Su RC, Yi WJ, Zhao ZG. Biodegradable Poly(Amino Ester) with Aromatic Backbone as Efficient Nonviral Gene Delivery Vectors. Molecules 2017; 22:E566. [PMID: 28362336 PMCID: PMC6154102 DOI: 10.3390/molecules22040566] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 03/25/2017] [Accepted: 03/28/2017] [Indexed: 11/16/2022] Open
Abstract
The development of gene delivery vectors with high efficiency and biocompatibility is one of the critical points of gene therapy. Two biodegradable poly(amino ester)s were synthesized via ring-opening polymerization between low molecular weight (LMW) PEI and diepoxide. The molecular weights of poly(amino ester)s were measured by GPC. Agarose gel retardation assays showed that these materials have good DNA-binding ability and can retard the electrophoretic mobility of plasmid DNA (pDNA) at a weight ratio of 1. The formed polyplexes have proper sizes of around 200 nm and zeta-potential values of about 30-40 mV for cellular uptake. In vitro experiments revealed that polymer P2 gave higher transfection efficiency than PEI 25KDa and Lipofectamine 2000 with less toxicity, especially in 293 cells. Results demonstrate that such a type of degradable poly(amino ester) may serve as a promising non-viral gene vector.
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Affiliation(s)
- Qiang Liu
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Rong-Chuan Su
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Wen-Jing Yi
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
| | - Zhi-Gang Zhao
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University, Chengdu 610041, China.
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23
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Yang S, Shi H, Chu X, Zhou X, Sun P. A rapid and efficient polyethylenimine-based transfection method to prepare lentiviral or retroviral vectors: useful for making iPS cells and transduction of primary cells. Biotechnol Lett 2016; 38:1631-41. [PMID: 27193760 DOI: 10.1007/s10529-016-2123-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 05/11/2016] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To improve the efficiency, reproducibility and consistency of the PEI-based transfection method that is often used in preparation of recombinant lentiviral or retroviral vectors. RESULTS The contributions to transfection efficiency of multi-factors including concentration of PEI or DNA, dilution buffer for PEI/DNA, manner to prepare PEI/DNA complexes, influence of serum, incubation time for PEI/DNA complexes, and transfection time were studied. Gentle mixing during the preparation of PEI/DNA transfection complexes is critical for a high transfection efficiency. PEI could be stored at room temperature or 4 °C, and most importantly, multigelation should be avoided. The transfection efficiency of the PEI-based new method in different types of cells, such as 293T, Cos-7, HeLa, HepG2, Hep3B, Huh7 and L02, was also higher than that of the previous method. After optimization, the titer of our lentiviral system or retroviral system produced by PEI-based new method was about 10- or 3-times greater than that produced by PEI-based previous method, respectively. CONCLUSION We provide a rapid and efficient PEI-based method for preparation of recombinant lentiviral or retroviral vectors which is useful for making iPS cells as well as transduction of primary cell cultures.
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Affiliation(s)
- Shaozhe Yang
- Stem Cell P2 Laboratory, Shantou University Medical College, Shantou, 515041, People's Republic of China
- The Center for Reproductive Medicine, Shantou University Medical College, Shantou, 515041, People's Republic of China
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, 515041, People's Republic of China
| | - Haijun Shi
- Stem Cell P2 Laboratory, Shantou University Medical College, Shantou, 515041, People's Republic of China
- The Center for Reproductive Medicine, Shantou University Medical College, Shantou, 515041, People's Republic of China
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, 515041, People's Republic of China
| | - Xinran Chu
- Stem Cell P2 Laboratory, Shantou University Medical College, Shantou, 515041, People's Republic of China
- The Center for Reproductive Medicine, Shantou University Medical College, Shantou, 515041, People's Republic of China
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, 515041, People's Republic of China
| | - Xiaoling Zhou
- Stem Cell P2 Laboratory, Shantou University Medical College, Shantou, 515041, People's Republic of China
- The Center for Reproductive Medicine, Shantou University Medical College, Shantou, 515041, People's Republic of China
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, 515041, People's Republic of China
| | - Pingnan Sun
- Stem Cell P2 Laboratory, Shantou University Medical College, Shantou, 515041, People's Republic of China.
- The Center for Reproductive Medicine, Shantou University Medical College, Shantou, 515041, People's Republic of China.
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, 515041, People's Republic of China.
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Smolar J, Salemi S, Horst M, Sulser T, Eberli D. Stem Cells in Functional Bladder Engineering. Transfus Med Hemother 2016; 43:328-335. [PMID: 27781020 PMCID: PMC5073506 DOI: 10.1159/000447977] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 06/23/2016] [Indexed: 12/24/2022] Open
Abstract
Conditions impairing bladder function in children and adults, such as myelomeningocele, posterior urethral valves, bladder exstrophy or spinal cord injury, often need urinary diversion or augmentation cystoplasty as when untreated they may cause severe bladder dysfunction and kidney failure. Currently, the gold standard therapy of end-stage bladder disease refractory to conservative management is enterocystoplasty, a surgical enlargement of the bladder with intestinal tissue. Despite providing functional improvement, enterocystoplasty is associated with significant long-term complications, such as recurrent urinary tract infections, metabolic abnormalities, stone formation, and malignancies. Therefore, there is a strong clinical need for alternative therapies for these reconstructive procedures, of which stem cell-based tissue engineering (TE) is considered to be the most promising future strategy. This review is focused on the recent progress in bladder stem cell research and therapy and the challenges that remain for the development of a functional bladder wall.
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Affiliation(s)
- Jakub Smolar
- Laboratory for Tissue Engineering and Stem Cell Therapy, Department of Urology, University Hospital Zurich, Zurich, Switzerland
| | - Souzan Salemi
- Laboratory for Tissue Engineering and Stem Cell Therapy, Department of Urology, University Hospital Zurich, Zurich, Switzerland
| | - Maya Horst
- Division of Pediatric Urology, Department of Pediatric Surgery, University Children's Hospital, Zurich, Switzerland
| | - Tullio Sulser
- Laboratory for Tissue Engineering and Stem Cell Therapy, Department of Urology, University Hospital Zurich, Zurich, Switzerland
| | - Daniel Eberli
- Laboratory for Tissue Engineering and Stem Cell Therapy, Department of Urology, University Hospital Zurich, Zurich, Switzerland
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25
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Cho SH, Noh YW, Cho MY, Lim YT. An Electrostatically Self-Assembled Ternary Nanocomplex as a Non-Viral Vector for the Delivery of Plasmid DNA into Human Adipose-Derived Stem Cells. Molecules 2016; 21:molecules21050572. [PMID: 27136523 PMCID: PMC6273813 DOI: 10.3390/molecules21050572] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 04/22/2016] [Accepted: 04/26/2016] [Indexed: 01/25/2023] Open
Abstract
In this study, we developed electrostatically self-assembled ternary nanocomplexes as a safe and effective non-viral vector for the delivery of plasmid DNA (pDNA) into human adipose-derived stem cells (hASCs). Although polyethylenimine (PEI) polymers initially showed excellent performance as gene delivery carriers, their broad use has been limited by cytotoxicity resulting from their strong positive charge. To reduce the cytotoxicity, we utilized anionic hyaluronic acid (HA) as a corona layer material for pDNA/PEI binary nanocomplexes. HA was also introduced to increase the targeting efficiency of pDNA/PEI nanocomplexes because HA has can bind CD44 that is highly expressed on the surface of hASCs. We confirmed that the addition of HA changed the surface charge of pDNA/PEI nanocomplexes from positive to negative. The pDNA/PEI/HA ternary nanocomplexes showed high transfection efficiency and low cytotoxicity compared with commercially available products. When hASCs were pretreated with HA to passivate CD44, the transfection efficiency of pDNA/PEI/HA nanocomplexes was significantly reduced. These results suggest that HA that can act as a targeting ligand to CD44 contributed to the improved transfection of pDNA into hASCs. Our novel pDNA/PEI/HA nanocomplexes may be used as an effective non-viral pDNA delivery system for hASCs.
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Affiliation(s)
- Sun-Hee Cho
- SKKU Advanced Institute of Nanotechnology (SAINT), School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea.
| | - Young-Woock Noh
- SKKU Advanced Institute of Nanotechnology (SAINT), School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea.
| | - Mi Young Cho
- SKKU Advanced Institute of Nanotechnology (SAINT), School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea.
| | - Yong Taik Lim
- SKKU Advanced Institute of Nanotechnology (SAINT), School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea.
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26
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Effect of miR-146a/bFGF/PEG-PEI Nanoparticles on Inflammation Response and Tissue Regeneration of Human Dental Pulp Cells. BIOMED RESEARCH INTERNATIONAL 2016; 2016:3892685. [PMID: 27057540 PMCID: PMC4745861 DOI: 10.1155/2016/3892685] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 12/30/2015] [Indexed: 11/18/2022]
Abstract
Introduction. Inflammation in dental pulp cells (DPCs) initiated by Lipopolysaccharide (LPS) results in dental pulp necrosis. So far, whether there is a common system regulating inflammation response and tissue regeneration remains unknown. miR-146a is closely related to inflammation. Basic fibroblast growth factor (bFGF) is an important regulator for differentiation. Methods. To explore the effect of miR-146a/bFGF on inflammation and tissue regeneration, polyethylene glycol-polyethyleneimine (PEG-PEI) was synthesized, and physical characteristics were analyzed by dynamic light scattering and gel retardation analysis. Cell absorption, transfection efficiency, and cytotoxicity were assessed. Alginate gel was combined with miR-146a/PEG-PEI nanoparticles and bFGF. Drug release ratio was measured by ultraviolet spectrophotography. Proliferation and odontogenic differentiation of DPCs with 1 μg/mL LPS treatment were determined. Results. PEG-PEI prepared at N/P 2 showed complete gel retardation and smallest particle size and zeta potential. Transfection efficiency of PEG-PEI was higher than lipo2000. Cell viability decreased as N/P ratio increased. Drug release rate amounted to 70% at the first 12 h and then maintained slow release afterwards. Proliferation and differentiation decreased in DPCs with LPS treatment, whereas they increased in miR-146a/bFGF gel group. Conclusions. PEG-PEI is a promising vector for gene therapy. miR-146a and bFGF play critical roles in inflammation response and tissue regeneration of DPCs.
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27
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Gene Transfection of Human Turbinate Mesenchymal Stromal Cells Derived from Human Inferior Turbinate Tissues. Stem Cells Int 2016; 2016:4735264. [PMID: 26783402 PMCID: PMC4691489 DOI: 10.1155/2016/4735264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/24/2015] [Indexed: 02/08/2023] Open
Abstract
Human turbinate mesenchymal stromal cells (hTMSCs) are novel stem cells derived from nasal inferior turbinate tissues. They are easy to isolate from the donated tissue after turbinectomy or conchotomy. In this study, we applied hTMSCs to a nonviral gene delivery system using polyethyleneimine (PEI) as a gene carrier; furthermore, the cytotoxicity and transfection efficiency of hTMSCs were evaluated to confirm their potential as resources in gene therapy. DNA-PEI nanoparticles (NPs) were generated by adding the PEI solution to DNA and were characterized by a gel electrophoresis and by measuring particle size and surface charge of NPs. The hTMSCs were treated with DNA-PEI NPs for 4 h, and toxicity of NPs to hTMSCs and gene transfection efficiency were monitored using MTT assay, fluorescence images, and flow cytometry after 24 h and 48 h. At a high negative-to-positive charge ratio, DNA-PEI NPs treatment led to cytotoxicity of hTMSCs, but the transfection efficiency of DNA was increased due to the electrostatic effect between the NPs and the membranes of hTMSCs. Importantly, the results of this research verified that PEI could deliver DNA into hTMSCs with high efficiency, suggesting that hTMSCs could be considered as untapped resources for applications in gene therapy.
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28
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Li M, Zhang F, Chen K, Wang C, Su Y, Liu Y, Zhou J, Wang W. Nanoparticles and mesenchymal stem cells: a win-win alliance for anticancer drug delivery. RSC Adv 2016. [DOI: 10.1039/c6ra00398b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Schematic illustration of the combination of NPs and MSCs drug delivery systems for cancer therapy.
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Affiliation(s)
- Min Li
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Fangrong Zhang
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Kerong Chen
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Cheng Wang
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Yujie Su
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Yuan Liu
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Jianping Zhou
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Wei Wang
- State Key Laboratory of Natural Medicines
- Department of Pharmaceutics
- China Pharmaceutical University
- Nanjing 210009
- China
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29
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Atluri K, Seabold D, Hong L, Elangovan S, Salem AK. Nanoplex-Mediated Codelivery of Fibroblast Growth Factor and Bone Morphogenetic Protein Genes Promotes Osteogenesis in Human Adipocyte-Derived Mesenchymal Stem Cells. Mol Pharm 2015; 12:3032-42. [PMID: 26121311 PMCID: PMC4613810 DOI: 10.1021/acs.molpharmaceut.5b00297] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This study highlights the importance of transfection mediated coordinated bone morphogenetic protein 2 (BMP-2) and fibroblast growth factor 2 (FGF-2) signaling in promoting osteogenesis. We employed plasmids independently encoding BMP-2 and FGF-2 complexed with polyethylenimine (PEI) to transfect human adipose derived mesenchymal stem cells (hADMSCs) in vitro. The nanoplexes were characterized for size, surface charge, in vitro cytotoxicity, and transfection ability in hADMSCs. A significant enhancement in BMP-2 protein secretion was observed on day 7 post-transfection of hADMSCs with PEI nanoplexes loaded with both pFGF-2 and pBMP-2 (PEI/(pFGF-2+pBMP-2)) versus transfection with PEI nanoplexes of either pFGF-2 alone or pBMP-2 alone. Osteogenic differentiation of transfected hADMSCs was determined by measuring osteocalcin and Runx-2 gene expression using real time polymerase chain reactions. A significant increase in the expression of Runx-2 and osteocalcin was observed on day 3 and day 7 post-transfection, respectively, by cells transfected with PEI/(pFGF-2+pBMP-2) compared to cells transfected with nanoplexes containing pFGF-2 or pBMP-2 alone. Alizarin Red staining and atomic absorption spectroscopy revealed elevated levels of calcium deposition in hADMSC cultures on day 14 and day 30 post-transfection with PEI/(pFGF-2+pBMP-2) compared to other treatments. We have shown that codelivery of pFGF-2 and pBMP-2 results in a significant enhancement in osteogenic protein synthesis, osteogenic marker expression, and subsequent mineralization. This research points to a new clinically translatable strategy for achieving efficient bone regeneration.
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Affiliation(s)
- Keerthi Atluri
- †Division of Pharmaceutics and Translational Therapeutics, College of Pharmacy, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Denise Seabold
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Liu Hong
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Satheesh Elangovan
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Aliasger K Salem
- †Division of Pharmaceutics and Translational Therapeutics, College of Pharmacy, The University of Iowa, Iowa City, Iowa 52242, United States
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
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Li H, Jiang H, Zhao M, Fu Y, Sun X. Intracellular redox potential-responsive micelles based on polyethylenimine-cystamine-poly(ε-caprolactone) block copolymer for enhanced miR-34a delivery. Polym Chem 2015. [DOI: 10.1039/c4py01623h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel polymer polyethylenimine-cystamine-poly(ε-caprolactone) with intracellular redox potential-responsive cleavable ability was synthesized and fabricated the micelles as smart gene vectors.
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Affiliation(s)
- Hanmei Li
- Key Laboratory of Drug Targeting and Drug Delivery Systems
- Ministry of Education
- West China School of Pharmacy
- Sichuan University Chengdu No. 17
- Chengdu
| | - Hao Jiang
- Key Laboratory of Drug Targeting and Drug Delivery Systems
- Ministry of Education
- West China School of Pharmacy
- Sichuan University Chengdu No. 17
- Chengdu
| | - Mengnan Zhao
- Key Laboratory of Drug Targeting and Drug Delivery Systems
- Ministry of Education
- West China School of Pharmacy
- Sichuan University Chengdu No. 17
- Chengdu
| | - Yao Fu
- Key Laboratory of Drug Targeting and Drug Delivery Systems
- Ministry of Education
- West China School of Pharmacy
- Sichuan University Chengdu No. 17
- Chengdu
| | - Xun Sun
- Key Laboratory of Drug Targeting and Drug Delivery Systems
- Ministry of Education
- West China School of Pharmacy
- Sichuan University Chengdu No. 17
- Chengdu
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31
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Fang YL, Chen XG, W T G. Gene delivery in tissue engineering and regenerative medicine. J Biomed Mater Res B Appl Biomater 2014; 103:1679-99. [PMID: 25557560 DOI: 10.1002/jbm.b.33354] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 11/07/2014] [Accepted: 11/18/2014] [Indexed: 12/13/2022]
Abstract
As a promising strategy to aid or replace tissue/organ transplantation, gene delivery has been used for regenerative medicine applications to create or restore normal function at the cell and tissue levels. Gene delivery has been successfully performed ex vivo and in vivo in these applications. Excellent proliferation capabilities and differentiation potentials render certain cells as excellent candidates for ex vivo gene delivery for regenerative medicine applications, which is why multipotent and pluripotent cells have been intensely studied in this vein. In this review, gene delivery is discussed in detail, along with its applications to tissue engineering and regenerative medicine. A definition of a stem cell is compared to a definition of a stem property, and both provide the foundation for an in-depth look at gene delivery investigations from a germ lineage angle.
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Affiliation(s)
- Y L Fang
- Department of Chemical & Biomolecular Engineering, Laboratory for Gene Therapy and Cellular Engineering, Tulane University, 300 Lindy Boggs Center, New Orleans, Louisiana, 70118
| | - X G Chen
- Department of Chemical & Biomolecular Engineering, Laboratory for Gene Therapy and Cellular Engineering, Tulane University, 300 Lindy Boggs Center, New Orleans, Louisiana, 70118
| | - Godbey W T
- Department of Chemical & Biomolecular Engineering, Laboratory for Gene Therapy and Cellular Engineering, Tulane University, 300 Lindy Boggs Center, New Orleans, Louisiana, 70118
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32
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Chandran PL, Dimitriadis EK, Lisziewicz J, Speransky V, Horkay F. DNA nanoparticles with core-shell morphology. SOFT MATTER 2014; 10:7653-60. [PMID: 25137385 PMCID: PMC4348574 DOI: 10.1039/c4sm00908h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Mannobiose-modified polyethylenimines (PEI) are used in gene therapy to generate nanoparticles of DNA that can be targeted to the antigen-presenting cells of the immune system. We report that the sugar modification alters the DNA organization within the nanoparticles from homogenous to shell-like packing. The depth-dependent packing of DNA within the nanoparticles was probed using AFM nano-indentation. Unmodified PEI-DNA nanoparticles display linear elastic properties and depth-independent mechanics, characteristic of homogenous materials. Mannobiose-modified nanoparticles, however, showed distinct force regimes that were dependent on indentation depth, with 'buckling'-like response that is reproducible and not due to particle failure. By comparison with theoretical studies of spherical shell mechanics, the structure of mannobiosylated particles was deduced to be a thin shell with wall thickness in the order of few nanometers, and a fluid-filled core. The shell-core structure is also consistent with observations of nanoparticle denting in altered solution conditions, with measurements of nanoparticle water content from AFM images, and with images of DNA distribution in Transmission Electron Microscopy.
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Affiliation(s)
- Preethi L. Chandran
- Section on Tissue Biophysics and Biomimetics, PPITS, NICHD
- Biomedical Engineering and Physical Science Shared Resource, NIBIB, Bldg 13, 13 South Drive, National Institutes of Health, Bethesda, MD 20892, USA
| | - Emilios K. Dimitriadis
- Biomedical Engineering and Physical Science Shared Resource, NIBIB, Bldg 13, 13 South Drive, National Institutes of Health, Bethesda, MD 20892, USA
| | | | - Vlad Speransky
- Biomedical Engineering and Physical Science Shared Resource, NIBIB, Bldg 13, 13 South Drive, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ferenc Horkay
- Section on Tissue Biophysics and Biomimetics, PPITS, NICHD
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Fülbier A, Schnabel R, Michael S, Vogt PM, Strauß S, Reimers K, Radtke C. Successful nucleofection of rat adipose-derived stroma cells with Ambystoma mexicanum epidermal lipoxygenase (AmbLOXe). Stem Cell Res Ther 2014; 5:113. [PMID: 25300230 PMCID: PMC4446083 DOI: 10.1186/scrt503] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 09/30/2014] [Indexed: 01/14/2023] Open
Abstract
INTRODUCTION Adipose-derived stroma cells (ASCs) are attractive cells for cell-based gene therapy but are generally difficult to transfect. Nucleofection has proven to be an efficient method for transfection of primary cells. Therefore, we used this technique to transfect ASCs with a vector encoding for Ambystoma mexicanum epidermal lipoxygenase (AmbLOXe) which is a promising bioactive enzyme in regenerative processes. Thereby, we thought to even further increase the large regenerative potential of the ASCs. METHODS ASCs were isolated from the inguinal fat pad of Lewis rats and were subsequently transfected in passage 1 using Nucleofector® 2b and the hMSC Nucleofector kit. Transfection efficiency was determined measuring co-transfected green fluorescent protein (GFP) in a flow cytometer and gene expression in transfected cells was detected by reverse transcription polymerase chain reaction (RT-PCR). Moreover, cell migration was assessed using a scratch assay and results were tested for statistical significance with ANOVA followed by Bonferroni's post hoc test. RESULTS High initial transfection rates were achieved with an average of 79.8 ± 2.82% of GFP positive cells although longer cultivation periods reduced the number of positive cells to below 5% after four passages. Although successful production of AmbLOXe transcript could be proven the gene product had no measureable effect on cell migration. CONCLUSIONS Our study demonstrates the feasibility of ASCs to serve as a vehicle of AmbLOXe transport for gene therapeutic purposes in regenerative medicine. One potential field of applications could be peripheral nerve injuries.
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Moradian H, Fasehee H, Keshvari H, Faghihi S. Poly(ethyleneimine) functionalized carbon nanotubes as efficient nano-vector for transfecting mesenchymal stem cells. Colloids Surf B Biointerfaces 2014; 122:115-125. [PMID: 25033431 DOI: 10.1016/j.colsurfb.2014.06.056] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 06/01/2014] [Accepted: 06/24/2014] [Indexed: 01/17/2023]
Abstract
For gene and drug delivery applications, carbon nanotubes (CNTs) have to be functionalized in order to become compatible with aqueous media and bind with genetic materials. In this study, combination of polyethyleneimine (PEI) grafted multi-walled carbon nanotubes (PEI-g-MWCNTs) and chitosan substrate is used as an efficient gene delivery system for transfection of hard-to-transfect bone marrow mesenchymal stem cells (BMSCs) with enhanced green fluorescent protein (EGFP) gene. Fourier transform infrared (FT-IR) spectra, dynamic light scattering (DLS) analysis and zeta potential measurements are used to characterize binding of PEI, particle size distribution and colloidal stability of the functionalized CNTs, respectively. DNA binding affinity, cellular uptake, transfection efficiency and possible cytotoxicity are also tested by agarose gel electrophoresis, flow cytometry, cytochemisty and MTT assay. The results demonstrate that cytotoxic effect of PEI-g-MWCNTs is negligible under optimal transfection condition. In consistency with high cellular uptake (>82%), PEI-g-MWCNTs give higher delivery of EGFP into the BMSCs which results in a more sustained expression of the model gene (EGFP) in short-term culture. These results suggest that PEI-g-MWCNTs in corporation with chitosan substrates would be a promising delivery system for BMSCs, a cell type with relevancy in the regenerative medicine and clinical applications.
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Affiliation(s)
- Hanieh Moradian
- Tissue Engineering and Biomaterials Division, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran 14965/161, Iran; Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran 15875/4413, Iran
| | - Hamidreza Fasehee
- Tissue Engineering and Biomaterials Division, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran 14965/161, Iran
| | - Hamid Keshvari
- Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran 15875/4413, Iran
| | - Shahab Faghihi
- Tissue Engineering and Biomaterials Division, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran 14965/161, Iran.
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35
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Wang Y, Fu Q, Zhao RY, Deng CL. Muscular tubes of urethra engineered from adipose-derived stem cells and polyglycolic acid mesh in a bioreactor. Biotechnol Lett 2014; 36:1909-16. [PMID: 24930094 DOI: 10.1007/s10529-014-1554-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 05/08/2014] [Indexed: 12/17/2022]
Abstract
We have explored the feasibility of using adipose-derived stem cells (ADSCs) and polyglycolic acid (PGA) for constructing muscular tubes of urethra in a bioreactor. With the induction of by 5-azacytidine, ADSCs were found to acquire a myoblast phenotype. Here we seeded ADSCs in a PGA mesh to construct the cell-PGA complex that was cultured statically for 1 week. Afterwards, the cell-PGA complex was subjected to extension stimulation in a bioreactor for 5 weeks. A muscular tube of urethra was formed after 6 weeks. Histological examination showed differentiated ADSCs and collagenous fibers had orientated well. This study demonstrates that tissue engineering of urethra tissues in vitro by using a bioreactor leads to tissue maturation and the differentiation of ADSCs. This novel technique could provide an effective approach for urethra tissue engineering.
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Affiliation(s)
- Ying Wang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yi Shan Road 600, Shanghai, 200233, China
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36
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Pang P, Wu C, Shen M, Gong F, Zhu K, Jiang Z, Guan S, Shan H, Shuai X. An MRI-visible non-viral vector bearing GD2 single chain antibody for targeted gene delivery to human bone marrow mesenchymal stem cells. PLoS One 2013; 8:e76612. [PMID: 24116127 PMCID: PMC3792021 DOI: 10.1371/journal.pone.0076612] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 08/26/2013] [Indexed: 01/14/2023] Open
Abstract
The neural ganglioside GD2 has recently been reported to be a novel surface marker that is only expressed on human bone marrow mesenchymal stem cells within normal marrow. In this study, an MRI-visible, targeted, non-viral vector for effective gene delivery to human bone marrow mesenchymal stem cells was first synthesized by attaching a targeting ligand, the GD2 single chain antibody (scAbGD2), to the distal ends of PEG-g-PEI-SPION. The targeted vector was then used to condense plasmid DNA to form nanoparticles showing stable small size, low cytotoxicity, and good biocompatibility. Based on a reporter gene assay, the transfection efficiency of targeting complex reached the highest value at 59.6% ± 4.5% in human bone marrow mesenchymal stem cells, which was higher than those obtained using nontargeting complex and lipofectamine/pDNA (17.7% ± 2.9% and 34.9% ± 3.6%, respectively) (P<0.01). Consequently, compared with the nontargeting group, more in vivo gene expression was observed in the fibrotic rat livers of the targeting group. Furthermore, the targeting capacity of scAbGD2-PEG-g-PEI-SPION was successfully verified in vitro by confocal laser scanning microscopy, Prussian blue staining, and magnetic resonance imaging. Our results indicate that scAbGD2-PEG-g-PEI-SPION is a promising MRI-visible non-viral vector for targeted gene delivery to human bone marrow mesenchymal stem cells.
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Affiliation(s)
- Pengfei Pang
- Molecular Imaging Lab, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Interventional Radiology Institute of Sun Yat-sen University, Guangzhou, China
- Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Chun Wu
- Molecular Imaging Lab, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Min Shen
- Molecular Imaging Lab, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Faming Gong
- PCFM Lab of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, China
| | - Kangshun Zhu
- Molecular Imaging Lab, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Interventional Radiology Institute of Sun Yat-sen University, Guangzhou, China
- Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Zaibo Jiang
- Molecular Imaging Lab, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Interventional Radiology Institute of Sun Yat-sen University, Guangzhou, China
- Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shouhai Guan
- Molecular Imaging Lab, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Interventional Radiology Institute of Sun Yat-sen University, Guangzhou, China
- Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Hong Shan
- Molecular Imaging Lab, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Interventional Radiology Institute of Sun Yat-sen University, Guangzhou, China
- Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- * E-mail: (HS) (XS)
| | - Xintao Shuai
- PCFM Lab of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, China
- * E-mail: (HS) (XS)
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37
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Gandra N, Wang DD, Zhu Y, Mao C. Virus-mimetic cytoplasm-cleavable magnetic/silica nanoclusters for enhanced gene delivery to mesenchymal stem cells. Angew Chem Int Ed Engl 2013; 52:11278-81. [PMID: 24038718 DOI: 10.1002/anie.201301113] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 05/27/2013] [Indexed: 01/03/2023]
Abstract
It does get in: Phage is made of DNA as a core and protein as a coat, and it can transfer DNA into host cells with high efficiency. Phage-mimetic gene transfer to hard-to-transfect mesenchymal stem cells (MSCs) was achieved using virus-mimetic magnetic silica nanoclusters (VMSNCs). The VMSNCs bear MSC-homing phage-borne protein on the surface and encapsulate DNA inside, promoting the transfer of DNA into MSCs.
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Affiliation(s)
- Naveen Gandra
- Department of Chemistry & Biochemistry, Stephenson Life Sciences Research Center, University of Oklahoma, 101 Stephenson Parkway, Room 3310, Norman, OK 73019-5300 (USA)
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38
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Gandra N, Wang DD, Zhu Y, Mao C. Virus-Mimetic Cytoplasm-Cleavable Magnetic/Silica Nanoclusters for Enhanced Gene Delivery to Mesenchymal Stem Cells. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301113] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hemp ST, Allen MH, Smith AE, Long TE. Synthesis and Properties of Sulfonium Polyelectrolytes for Biological Applications. ACS Macro Lett 2013; 2:731-735. [PMID: 35606959 DOI: 10.1021/mz4002172] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Sulfonium macromolecules displayed for the first time nucleic acid binding and transfection in vitro. Conventional and controlled radical polymerization techniques coupled with subsequent alkylation generated a sulfonium homopolymer, poly(DMSEMA), and a sulfonium diblock copolymer, poly(OEG-b-DMSEMA). DNA gel shift assays probed the ability of sulfonium macromolecules to complex nucleic acids, and luciferase assays examined the transfection efficiency and cytotoxicity of both sulfonium macromolecules. Poly(DMSEMA) and poly(OEG-b-DMSEMA) bound pDNA at a charge ratio of 1, and both induced significant luciferase expression in HeLa cells under serum-free conditions. Colloidal stability studies using dynamic light scattering highlighted the excellent colloidal stability of poly(OEG-b-DMSEMA) under salt and serum conditions due to the sterically stabilizing OEG block. Sulfonium macromolecules offer an alternate route to design cationic macromolecules for nonviral nucleic acid delivery, and future work will aim to add functionality to create more efficient delivery vehicles.
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Affiliation(s)
- Sean T. Hemp
- Department
of Chemistry and
Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Michael H. Allen
- Department
of Chemistry and
Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Adam E. Smith
- Department of Chemical Engineering, The University of Mississippi, University, Mississippi
38677, United States
| | - Timothy E. Long
- Department
of Chemistry and
Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
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40
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Wegman F, Oner FC, Dhert WJA, Alblas J. Non-viral gene therapy for bone tissue engineering. Biotechnol Genet Eng Rev 2013; 29:206-20. [PMID: 24568281 DOI: 10.1080/02648725.2013.801227] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The possibilities of using gene therapy for bone regeneration have been extensively investigated. Improvements in the design of new transfection agents, combining vectors and delivery/release systems to diminish cytotoxicity and increase transfection efficiencies have led to several successful in vitro, ex vivo and in vivo strategies. These include growth factor or short interfering ribonucleic acid (siRNA) delivery, or even enzyme replacement therapies, and have led to increased osteogenic differentiation and bone formation in vivo. These results provide optimism to consider use in humans with some of these gene-delivery strategies in the near future.
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Affiliation(s)
- Fiona Wegman
- a Department of Orthopaedics , UMC Utrecht , Utrecht , The Netherlands
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41
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A novel method for genetic transformation of yeast cells using oligoelectrolyte polymeric nanoscale carriers. Biotechniques 2013; 54:35-43. [PMID: 23510387 DOI: 10.2144/000113980] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 12/17/2012] [Indexed: 11/23/2022] Open
Abstract
The genetic transformation of target cells is a key tool in modern biological research, as well as in many gene therapy and biotechnology applications. Here we describe a new method for delivery of DNA into several industrially important species of yeast, including Saccharomyces cerevisiae. Our method is based on the use of a novel nanoscale oligoelectrolyte polymer possessing a comb-like structure as a carrier molecule. Direct comparisons to standard transformation methods clearly show that our approach: (i) yields two times more transformants of Hansenula polymorpha NCYC 495 compared to electroporation approaches and 15 times more transformants compared to lithium acetate protocols, as well as (ii) 5 times more Pichia pastoris GS115 transformants compared to electroporation and 79 times more transformants compared to lithium acetate. Taken together, these results clearly indicate genetic transformation of yeasts using oligoelectrolyte polymer carriers is a highly effective means of gene delivery.
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42
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Kurosaki T, Uematsu M, Shimoda K, Suzuma K, Nakai M, Nakamura T, Kitahara T, Kitaoka T, Sasaki H. Ocular Gene Delivery Systems Using Ternary Complexes of Plasmid DNA, Polyethylenimine, and Anionic Polymers. Biol Pharm Bull 2013; 36:96-101. [DOI: 10.1248/bpb.b12-00728] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Tomoaki Kurosaki
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University
- The Japan Society for the Promotion of Science (JSPS)
| | - Masafumi Uematsu
- Department of Ophthalmology and Visual Sciences, Graduate School of Biomedical Sciences, Nagasaki University
| | | | - Kiyoshi Suzuma
- Department of Ophthalmology and Visual Sciences, Graduate School of Biomedical Sciences, Nagasaki University
| | - Masato Nakai
- Department of Hospital Pharmacy, Nagasaki University Hospital
| | | | | | - Takashi Kitaoka
- Department of Ophthalmology and Visual Sciences, Graduate School of Biomedical Sciences, Nagasaki University
| | - Hitoshi Sasaki
- Department of Hospital Pharmacy, Nagasaki University Hospital
- Global COE Program, Nagasaki University
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43
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High levels of ephrinB2 over-expression increases the osteogenic differentiation of human mesenchymal stem cells and promotes enhanced cell mediated mineralisation in a polyethyleneimine-ephrinB2 gene-activated matrix. J Control Release 2012. [PMID: 23201622 DOI: 10.1016/j.jconrel.2012.11.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Gene therapy can be combined with tissue engineering constructs to produce gene-activated matrices (GAMs) with enhanced capacity for repair. Polyethyleneimine (PEI), a non-viral vector, has previously been optimised for high efficiency gene transfer in rat mesenchymal stem cells (rMSCs). The use of PEI to transfect human MSCs (hMSCs) with ephrinB2 is assessed here. Recently a role for the ephrinB2 ligand and EphB4 receptor duo has been proposed in bone remodelling. Herein, over-expression of the ephrinB2 ligand resulted in increased osteogenic differentiation in hMSCs. As ephrinB2 is a cell surface anchored ligand which only interacts with cells expressing the cognate EphB4 receptor through direct contact, we have shown that direct cell-cell contact between two neighbouring cells is responsible for enhanced osteogenesis. In an effort to begin to elucidate the molecular mechanisms at play downstream of ephrinB2 over-expression, RT-PCR was performed on the GAMs which revealed no significant changes in runx2 or BMP2 expression but an upregulation of osterix (Osx) and Dlx5 expression prompting the belief that the mode of osteogenesis is independent of the BMP2 pathway. This select interaction, coupled with the transient gene expression profile of PEI, makes the PEI-ephrinB2 GAM an ideal candidate matrix for a bone targeted GAM.
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44
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Deveza L, Choi J, Imanbayev G, Yang F. Paracrine release from nonviral engineered adipose-derived stem cells promotes endothelial cell survival and migration in vitro. Stem Cells Dev 2012; 22:483-91. [PMID: 22889246 DOI: 10.1089/scd.2012.0201] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Stem cells hold great potential for therapeutic angiogenesis due to their ability to directly contribute to new vessel formation or secrete paracrine signals. Adipose-derived stem cells (ADSCs) are a particularly attractive autologous cell source for therapeutic angiogenesis due to their ease of isolation and relative abundance. Gene therapy may be used to further enhance the therapeutic efficacy of ADSCs by overexpressing desired therapeutic factors. Here, we developed vascular endothelial growth factor (VEGF)-overexpressing ADSCs utilizing poly(β-amino esters) (PBAEs), a hydrolytically biodegradable polymer, and examined the effects of paracrine release from nonviral modified ADSCs on the angiogenic potential of human umbilical vein endothelial cells (HUVECs) in vitro. PBAE polymeric vectors delivered DNA into ADSCs with high efficiency and low cytotoxicity, leading to an over 3-fold increase in VEGF production by ADSCs compared with Lipofectamine 2000. Paracrine release from PBAE/VEGF-transfected ADSCs enhanced HUVEC viability and decreased HUVEC apoptosis under hypoxia. Further, paracrine release from PBAE/VEGF-transfected ADSCs significantly enhanced HUVEC migration and tube formation, two critical cellular processes for effective angiogenesis. Our results demonstrate that genetically engineered ADSCs using biodegradable polymeric nanoparticles may provide a promising autologous cell source for therapeutic angiogenesis in treating cardiovascular diseases.
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Affiliation(s)
- Lorenzo Deveza
- School of Medicine, Stanford University, Stanford, California 94305, USA
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Hemp ST, Smith AE, Bryson JM, Allen MH, Long TE. Phosphonium-Containing Diblock Copolymers for Enhanced Colloidal Stability and Efficient Nucleic Acid Delivery. Biomacromolecules 2012; 13:2439-45. [DOI: 10.1021/bm300689f] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Sean T. Hemp
- Department of Chemistry
and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, Virginia
24061, United States
| | - Adam E. Smith
- Department of Chemistry
and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, Virginia
24061, United States
| | | | - Michael H. Allen
- Department of Chemistry
and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, Virginia
24061, United States
| | - Timothy E. Long
- Department of Chemistry
and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, Virginia
24061, United States
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Pimpha N, Sunintaboon P, Inphonlek S, Tabata Y. Gene Delivery Efficacy of Polyethyleneimine-Introduced Chitosan Shell/Poly(methyl Methacrylate) Core Nanoparticles for Rat Mesenchymal Stem Cells. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 21:205-23. [DOI: 10.1163/156856209x415503] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Nuttaporn Pimpha
- a National Nanotechnology Center, Thailand Science Park, Paholyothin Rd., Pathumthani, 12120, Thailand
| | - Panya Sunintaboon
- b Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Supharat Inphonlek
- c Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Yasuhiko Tabata
- d Department of Biomaterials, Field of Tissue Engineering, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan;,
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Mehmet Saka O, Bozkir A. Formulation and in vitro characterization of PEGylated chitosan and polyethylene imine polymers with thrombospondin-I gene bearing pDNA. J Biomed Mater Res B Appl Biomater 2012; 100:984-92. [DOI: 10.1002/jbm.b.32661] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 11/10/2011] [Accepted: 11/22/2011] [Indexed: 11/10/2022]
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Hemp ST, Allen MH, Green MD, Long TE. Phosphonium-containing polyelectrolytes for nonviral gene delivery. Biomacromolecules 2011; 13:231-8. [PMID: 22136386 DOI: 10.1021/bm201503a] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Nonviral gene therapy focuses intensely on nitrogen-containing macromolecules and lipids to condense and deliver DNA as a therapeutic for genetic human diseases. For the first time, DNA binding and gene transfection experiments compared phosphonium-containing macromolecules with their respective ammonium analogs. Conventional free radical polymerization of quaternized 4-vinylbenzyl chloride monomers afforded phosphonium- and ammonium-containing homopolymers for gene transfection experiments of HeLa cells. Aqueous size exclusion chromatography confirmed similar absolute molecular weights for all polyelectrolytes. DNA gel shift assays and luciferase expression assays revealed phosphonium-containing polymers bound DNA at lower charge ratios and displayed improved luciferase expression relative to the ammonium analogs. The triethyl-based vectors for both cations failed to transfect HeLa cells, whereas tributyl-based vectors successfully transfected HeLa cells similar to Superfect demonstrating the influence of the alkyl substituent lengths on the efficacy of the gene delivery vehicle. Cellular uptake of Cy5-labeled DNA highlighted successful cellular uptake of triethyl-based polyplexes, showing that intracellular mechanisms presumably prevented luciferase expression. Endocytic inhibition studies using genistein, methyl β-cyclodextrin, or amantadine demonstrated the caveolae-mediated pathway as the preferred cellular uptake mechanism for the delivery vehicles examined. Our studies demonstrated that changing the polymeric cation from ammonium to phosphonium enables an unexplored array of synthetic vectors for enhanced DNA binding and transfection that may transform the field of nonviral gene delivery.
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Affiliation(s)
- Sean T Hemp
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
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Luo XH, Huang FW, Qin SY, Wang HF, Feng J, Zhang XZ, Zhuo RX. A strategy to improve serum-tolerant transfection activity of polycation vectors by surface hydroxylation. Biomaterials 2011; 32:9925-39. [DOI: 10.1016/j.biomaterials.2011.09.011] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 09/06/2011] [Indexed: 11/17/2022]
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Tierney EG, Duffy GP, Hibbitts AJ, Cryan SA, O'Brien FJ. The development of non-viral gene-activated matrices for bone regeneration using polyethyleneimine (PEI) and collagen-based scaffolds. J Control Release 2011; 158:304-11. [PMID: 22138069 DOI: 10.1016/j.jconrel.2011.11.026] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 11/16/2011] [Accepted: 11/19/2011] [Indexed: 12/19/2022]
Abstract
The healing potential of scaffolds for tissue engineering can be enhanced by combining them with genes to produce gene-activated matrices (GAMs) for tissue regeneration. We examined the potential of using polyethyleneimine (PEI) as a vector for transfection of mesenchymal stem cells (MSCs) in monolayer culture and in 3D collagen-based GAMs. PEI-pDNA polyplexes were fabricated at a range of N/P ratios and their optimal transfection parameters (N/P 7 ratio, 2μg dose) and transfection efficiencies (30±8%) determined in monolayer culture. The polyplexes were then loaded onto collagen, collagen-glycosaminoglycan and collagen-nanohydroxyapatite scaffolds where gene expression was observed up to 21 days with a polyplex dose as low as 2μg. Transient expression profiles indicated that the GAMs act as a polyplex depot system whereby infiltrating cells become transfected over time as they migrate throughout the scaffold. The collagen-nHa GAM exhibited the most prolonged and elevated levels of transgene expression. This research has thus demonstrated that PEI is a highly efficient pDNA transfection agent for both MSC monolayer cultures and in the 3D GAM environment. By combining therapeutic gene therapy with highly engineered scaffolds, it is proposed that these GAMs might have immense capability to promote tissue regeneration.
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Affiliation(s)
- Erica G Tierney
- Department of Anatomy, Royal College of Surgeons in Ireland, Dublin, Ireland
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