DOCSLIB.ORG

Polycation Liposomes, a Novel Nonviral Gene Transfer System, Constructed from Cetylated Polyethylenimine

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Polycation Liposomes, a Novel Nonviral Gene Transfer System, Constructed from Cetylated Polyethylenimine Gene Therapy (2000) 7, 1148–1155 2000 Macmillan Publishers Ltd All rights reserved 0969-7128/00 $15.00 www.nature.com/gt NONVIRAL TRANSFER TECHNOLOGY RESEARCH ARTICLE Polycation liposomes, a novel nonviral gene transfer system, constructed from cetylated polyethylenimine Y Yamazaki1, M Nango2, M Matsuura1, Y Hasegawa1, M Hasegawa3 and N Oku1 1Department of Radiobiochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka; 2Department of Applied Chemistry, Nagoya Institute of Technology, Nagoya; and 3DNAVEC Research Inc, Kannondai, Tsukuba, Ibaraki, Japan A novel gene transfer system was developed by using lipo- thermore, the transfection efficacy of PCLs was enhanced, somes modified with cetylated polyethylenimine (PEI, MW instead of being diminished, in the presence of serum. Effec- 600). This polycation liposome, PCL, showed remarkable tive gene transfer was observed in all eight malignant and transfection efficiency as monitored by the expression of the two normal cells line tested, as well as in COS-1 cells. We GFP reporter gene. Most conventional cationic liposomes also examined the effect of the molecular weight of PEI on require phosphatidylethanolamine or cholesterol as a PCL-mediated gene transfer, and observed that PEI with a component, although PCLs did not. Egg yolk phosphatidyl- MW of 1800 Da was as effective as that with one of 600, but choline- and dipalmitoylphosphatidylcholine-based PCL that PEI of 25 000 was far less effective. Finally, an in vivo were as effective as dioleoylphosphatidylethanolamine- study was done in which GFP was effectively expressed in based PCLs for gene transfer. Concerning the cytotoxicity mouse liver after injection of PCL via the portal vein. Thus, against COS-1 cells and hemolytic activity, the PCL was PCL represents a new system useful for transfection and superior to conventional cationic liposome preparations. Fur- gene therapy. Gene Therapy (2000) 7, 1148–1155. Keywords: gene transfer; transfection; liposome; polycation; polyethylenimine Introduction the endosomal pathway.21 The present paper indicates that PCLs actually deliver genes effectively with low Efficient and safe gene transfer systems are the funda- cytotoxicity. Furthermore, the PCL is, unlike many cat- mental basis for gene therapy, as well as for laboratory ionic liposomal formulations,22–24 effective in the presence 1–3 applications. Viral systems are, in general, quite effec- of serum. This characteristic is favorable for in vivo use tive for gene transfer, although there are arguments of gene delivery systems. about their safety and immunogenicity.4,5 Therefore, a number of nonviral systems, especially cationic lipo- Results somes, have been developed.6–9 Cationic liposomes form a complex with anionic DNA molecules and are thought Transfection by PCL to deliver DNA through endosomes after endocytosis of At first, we grafted 22 mol% cetyl groups on to poly- 10 the complex, although the precise mechanism for gene ethyleneimine-600 (PEI600 with an average molecular transfection mediated by cationic liposomes is still weight (MW) of 600); thus one polymer may contain 14 unclear. The cationic liposomal system, however, has ethylene units and three cetyl groups. PCLs were pre- some disadvantages such as low efficiency of transfection pared with this tricetyl-PEI600 (P6C22) and dioleoylphos- due to DNA degradation in lysosomes and strong cyoto- phatidylethanolamine (DOPE) (0.65:1 as a molar ratio). 11 toxicity. Polycations have been also used for nonviral We confirmed the modification of liposomes with the systems. Among them, polyethylenimine (PEI) has been polycation, ie PEI, by the determination of the liposomal 12–20 revealed to be effective to deliver genes, where genes ␨-potential. The ␨-potential of the PCL in phosphate-buff- may be delivered to the cytoplasm via endosomes due to ered saline (PBS, pH 7.4) was +41.6 ± 0.1 mV, whereas the proton-sponge effect of PEI. In this study, we that of DOPE liposomes was −3.4 ± 2.9 mV, indicating developed an effective nonviral gene transfer system by that the liposomal surface of the PCL was positively combining the advantages of both liposomes and polyca- charged. Then, we transfected COS-1 cells with pEGFP tions. Polycation liposomes (PCLs) were prepared by the bearing the green fluorescent protein (GFP) reporter gene modification of liposomes with cetylated PEI. We orig- by means of these PCLs. The GFP gene was expressed inally reported that liposomes modified with cetylated 1 day after transfection, and the highest expression was PEI derivative might deliver agents into the cytosol via observed during the second to fourth day. Figure 1 shows a typical image of transfected COS-l cells seen by fluor- escence microscopy after 48 h, at which time the cells Correspondence: N Oku, Department of Radiobiochemistry, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, were still subconfluent. As shown in this Figure, many Japan cells were fluorescence positive. The gene expression was Received 17 August 1999; accepted 12 March 2000 increased dose dependently (data not shown). Gene transfer system by polycation liposomes Y Yamazaki et al 1149 location of the original plasmid was decreased by increasing the amount of PCL, suggesting the complex formation between PCL and DNA; and a drastic decrease was observed at 9 equivalents. The DNA band at the location of the original plasmid was completely dimin- ished at 12 equivalents (data not shown). This result suggests that PCLs neutralized DNA between 9 and 12 equivalents and that the PCL/DNA complex assumed a net positive charge at least when the PCL was present as more than 12 equivalents against the DNA. Cytotoxic action of PCL Since conventional cationic liposomes are known to have marked cytotoxic activity, we next determined the cyto- toxic activity of PCL against COS-1 cells. PCL and control cationic liposomes showed cytotoxic activity in a dose- dependent manner (data not shown). PCL and control cationic liposomes containing LipofectAMINE also a b showed similar cytotoxic activities after complexation with DNA. Table 1 summarizes the most effective dose for transfection and the 50% cytotoxic doses (CD50) Figure 1 GFP expression in COS-1 cells after transfection with PCL. against COS-1 cells. As is apparent from the Table, PCL PCLs composed of P6C22 and DOPE (0.65:1 as molar ratio) was com- caused the least cytotoxic action as evaluated by the dif- plexed with 1 ␮g GFP plasmid (PCL/DNA = 1:1 as unit ratio) and incu- bated with COS-1 cells for 3 h at 37°C. The cells were incubated for an ference between transfection dose and CD50. We also additional 48 h and observed by bright field microscopy (a), fluorescence determined the hemolytic activity of PCL and cationic microscopy (b). liposomes toward chicken erythrocytes, and observed that PCL was the least hemolytic (data not shown). The efficiency of transfection mediated by PCLs was Transfection efficiency of PCL in the presence of serum evaluated by monitoring GFP fluorescence intensity and It is well known that the transfection efficiency of con- comparing this efficiency with that of transfection ventional cationic liposomes is suppressed in the pres- mediated by conventional cationic liposomes, namely, ence of serum. This tendency, however, is unfavorable liposomes containing 1,2-dimyristyloxypropyl-3- especially if the carrier is to be used in vivo. Thus, we dimethyl-hydroxyethylammonium bromide (DMRIE), determined the transfection efficiency of PCL in the pres- 1,2-dioleoyl-3- trimethylammonium propane (DOTAP), ence of serum. As shown in Figure 4, LipofectAMINE or 2,3-dioleyloxy-N-[2(sperminecarboxamido)ethyl]-N,N- showed the highest transfection efficiency in the absence dimethyl-1-propanaminium trifluoroacetate (DOSPA, of serum, although the effect was markedly suppressed lipofectamine). The DNA concentration was fixed as in the presence of serum. The amount of GFP expression 1 ␮g/35-mm dish in this and subsequent experiments. As in the presence of 50% serum was only 27% and 17% for shown in Figure 2a, the efficiency was higher for PCL- LipofectAMINE and DOTAP liposome, respectively, in mediated transfection than for that by DMRIE- or DOT- comparison with that in the absence of serum. On the AP- liposomes. The DNA/carrier ratio for obtaining contrary, the transfection efficiency of PCL was mildly adequate fluorescence intensity was also broad for PCLs. increased in the presence of serum. DMRIE liposomes Furthermore, the PCLs did not require DOPE or choles- also showed serum resistance in terms of transfection terol as a liposomal component, since COS-1 cells could activity. The amount of GFP expression in the presence also be transfected with egg yolk phosphatidylcholine of 50% serum was 129% and 136% of that in its absence (EPC)- or dipalmitoyl-PC (DPPC)-based PCLs for PCL and DMRIE liposomes, respectively. (Figure 2b). To clarify the reason for serum activation of PCL- Figure 3 summarizes the efficiency of GFP gene trans- mediated transfection, we examined the formation of fection of COS-1 cells when the PCL composition or DNA/PCL complexes under the microscope. PCL and PCL/DNA ratio was varied. Appropriate transfection DNA appeared as rather heterogeneous aggregates in the efficiency was observed when the molar ratio of P6C22 absence of serum, but formed smaller and rather homo- and DOPE was changed from 0.65 to 3.0, although the geneous ones in the presence of serum (data not shown). optimum transfection was observed at the ratio of 0.65 Therefore, it is possible that the aggregation status of or 1.0 depending on the PCL/DNA ratio. PCL and DNA DNA/PCL in the presence of serum is favorable for ratio was expressed in terms of ethylenimine units (14 transfection, although further experiments relating to the units per one P6C22 molecule) and DNA phosphate. transfection mechanism must be done before an expla- When the P6C22/DOPE ratio was 0.65 or 1.0, in both nation can be given for the effect of serum on PCL- cases the highest transfection was observed at 9.5 equiva- mediated transfection.
Load more

Recommended publications
  • The Impact of Transfection Mediated Toxicity
    The Impact of Transfection Mediated Toxicity - Gene Expression and Cytotoxicity Analysis of Transfection Reagents Chuenchanok Khodthong, Issam Ismaili and Laura Juckem Mirus Bio LLC www.TheTransfectionExperts.com Providing gene delivery expertise since 1995 ©2012 All rights reserved Mirus Bio LLC. All trademarks are the property of their respective owners. The Impact of Transfection Mediated Toxicity – Gene Expression and Cytotoxicity Analysis of Transfection Reagents Introduction While plasmid DNA delivery is a widely used method to study cellular functions of proteins of interest, studies to identify nontoxic gene delivery reagents are limited. With the advent of high‐information content technologies, especially RT‐qPCR array, it is now possible to identify the gene expression response to a particular cellular insult. This improvement, coupled with the observation that virtually all toxic responses are accompanied by changes in gene expression, suggests that gene expression analysis has the potential to refine the identification of minimal‐toxicity transfection reagent where phenotypic responses such as altered morphology is not immediately evident. Consequently, we conducted an integrative study to explore the conventional toxicological endpoints and to identify the minimal‐ transcriptomic effects of TransIT®‐LT1, TransIT®‐2020 and Lipofectamine® 2000 Transfection Reagents using quantitative reverse transcriptase PCR (RT‐qPCR) array and pathway analysis software. Results Effect of Transfection on Cell Morphology and Viability To evaluate a role of transfection‐related toxicity, time course and dose‐dependent experiments were conducted. Hela cells were treated with various concentrations of pDNA/transfection reagent complexes for up to 24 hours. Transfection toxicity was then evaluated by morphology (Figure. 1) and by Lactate Dehydrogenase (LDH) leakage assays (Figure.
    [Show full text]
  • Lipofection of Cultured Mouse Muscle Cells: a Direct Comparison of Lipofectamine and DOSPER
    Gene Therapy (1998) 5, 542–551 1998 Stockton Press All rights reserved 0969-7128/98 $12.00 http://www.stockton-press.co.uk/gt Lipofection of cultured mouse muscle cells: a direct comparison of Lipofectamine and DOSPER E Dodds1, MG Dunckley1, K Naujoks2, U Michaelis2 and G Dickson1 1Division of Biochemistry, School of Biological Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK; and 2Division of Therapeutics, Boehringer Mannheim GmbH, Penzberg, Germany Cationic lipid–DNA complexes (lipoplexes) have been (GFP) were used in order to evaluate transfection widely used as gene transfer vectors which avoid the efficiency by histochemical staining or FACS analysis, adverse immunogenicity and potential for viraemia of viral respectively. Both lipid formulations were able to promote vectors. With the long-term aim of gene transfer into skel- efficient, reproducible gene transfer in C2C12 cells, and etal muscle in vivo, we describe a direct in vitro comparison to transfect primary mouse myoblast cultures successfully. of two commercially available cationic lipid formulations, However, DOSPER exhibited the important advantage of Lipofectamine and DOSPER. Optimisation of transfection being able to transfect cells in the presence of serum of was performed in the C2C12 mouse muscle cell line, both bovine and murine origin. This feature allowed before further studies in primary mouse myoblasts and increased cell survival during in vitro transfections, and C2C12 myotubes. Reporter gene constructs expressing may be advantageous for direct in vivo gene transfer either E. coli ␤-galactosidase or green fluorescent protein efficacy. Keywords: gene transfer; lipoplex; lipofection; skeletal muscle Introduction biosafety issues and adverse immune responses have led to the development of a range of alternative, nonviral Skeletal muscle provides an excellent target for the systems, where repeated administration is possible.4 expression of recombinant genes as its structure and Some of the most promising results have come from the function are well understood.
    [Show full text]
  • Efficient Generation of Transgenic Buffalos (Bubalus Bubalis)
    www.nature.com/scientificreports OPEN Efcient Generation of Transgenic Bufalos (Bubalus bubalis) by Nuclear Transfer of Fetal Received: 13 February 2017 Accepted: 11 April 2018 Fibroblasts Expressing Enhanced Published: xx xx xxxx Green Fluorescent Protein Fenghua Lu1, Chan Luo1, Nan Li1,2, Qingyou Liu1, Yingming Wei1, Haiying Deng1, Xiaoli Wang1, Xiangping Li1, Jianrong Jiang1, Yanfei Deng1 & Deshun Shi1 The possibility of producing transgenic cloned bufalos by nuclear transfer of fetal fbroblasts expressing enhanced green fuorescent protein (EGFP) was explored in this study. When bufalo fetal fbroblasts (BFFs) isolated from a male bufalo fetus were transfected with pEGFP-N1 (EGFP is driven by CMV and Neo is driven by SV-40) by means of electroporation, Lipofectamine-LTX and X-tremeGENE, the transfection efciency of electroporation (35.5%) was higher than Lipofectamine-LTX (11.7%) and X-tremeGENE (25.4%, P < 0.05). When BFFs were transfected by means of electroporation, more embryos from BFFs transfected with pEGFP-IRES-Neo (EGFP and Neo are driven by promoter of human elongation factor) cleaved and developed to blastocysts (21.6%) compared to BFFs transfected with pEGFP-N1 (16.4%, P < 0.05). A total of 72 blastocysts were transferred into 36 recipients and six recipients became pregnant. In the end of gestation, the pregnant recipients delivered six healthy calves and one stillborn calf. These calves were confrmed to be derived from the transgenic cells by Southern blot and microsatellite analysis. These results indicate that electroporation is more efcient than lipofection in transfecting exogenous DNA into BFFs and transgenic bufalos can be produced efectively by nuclear transfer of BFFs transfected with pEGFP-IRES-Neo.
    [Show full text]
  • Mammalian Cell Penetration, Sirna Transfection, and DNA Transfection by Supercharged Proteins
    Mammalian cell penetration, siRNA transfection, and DNA transfection by supercharged proteins Brian R. McNaughton, James J. Cronican, David B. Thompson, and David R. Liu1 Howard Hughes Medical Institute, Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA 02138 Edited by Carolyn R. Bertozzi, University of California, Berkeley, CA, and approved February 10, 2009 (received for review August 12, 2008) Nucleic acid reagents, including small interfering RNA (siRNA) and net theoretical charge (ϩ36 GFP) was highly aggregation-resistant, plasmid DNA, are important tools for the study of mammalian cells could retain fluorescence even after being boiled and cooled, and are promising starting points for the development of new and reversibly complexed DNA and RNA through electrostatic therapeutic agents. Realizing their full potential, however, re- interactions. quires nucleic acid delivery reagents that are simple to prepare, A variety of cationic peptides and proteins have been observed effective across many mammalian cell lines, and nontoxic. We to penetrate mammalian cells (18–24). We hypothesized that recently described the extensive surface mutagenesis of proteins in superpositively charged proteins such as ϩ36 GFP might also a manner that dramatically increases their net charge. Here, we associate with negatively charged components of the cell membrane report that superpositively charged green fluorescent proteins, in a manner that results in cell penetration. Given the ability of these including a variant with a theoretical net charge of ؉36 (؉36 GFP), proteins to bind nucleic acids reversibly, we further speculated that can penetrate a variety of mammalian cell lines. Internalization of superpositively charged proteins may also deliver precomplexed ؉36 GFP depends on nonspecific electrostatic interactions with nucleic acids, including small interfering RNA (siRNA) or plasmid sulfated proteoglycans present on the surface of most mammalian DNA, into mammalian cells.
    [Show full text]
  • Transfection and Genome Engineering Innovation Delivered Transfection Selection Guide 4 Contents Transfection Decision Tree 5 Superior Transfection Reagents 6
    Transfection and genome engineering Innovation delivered Transfection selection guide 4 Contents Transfection decision tree 5 Superior transfection reagents 6 Lipofectamine® 3000 Transfection Reagent 6 Lipofectamine® RNAiMAX Transfection Reagent 10 Lipofectamine® MessengerMAX™ Transfection Reagent 11 ExpiFectamine™ 293 Transfection Kit 14 Broad-spectrum transfection reagent 15 Lipofectamine® 2000 Transfection Reagent 15 Electroporation 16 Neon® Transfection System 16 In vivo delivery 17 Invivofectamine 3.0 Reagent 17 Transfection-related products 19 Opti-MEM® I Reduced-Serum Medium 19 Selection antibiotics 19 Genome modulation and engineering 20 Ambion® siRNA 20 mirVana™ miRNA Mimics and Inhibitors 22 GeneArt® CRISPR tools 24 GeneArt® TAL effector tools 25 Ordering information 26 50,000 Transfection decision tree Transfection selection guide 45,000 Transfection Transfection 40,000 decision tree 35,000 Transfection is the process by which nucleic acids are introduced into eukaryotic cells. 30,000 PAYLOAD RNAi Plasmid DNA mRNA Techniques vary widely and include lipid-based transfection and physical methods such as 25,000 ® siRNA, miRNA Cas9 DNA, GFP, Luc, shRNA Cas9 mRNA, GFP mRNA electroporation. Lipofectamine transfection reagents are the most trusted and cited in the 20,000 scientific literature due to their superior transfection performance and broad cell spectrum. 15,000 An overview of our most effective transfection products is shown in Table 1 to help you 10,000 COTRANSFECTION choose the solution that’s right for you. 5,000 0 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 201020112012 2013 2014 Table 1. Transfection selection guide—more blocks represent higher Cumulative number of publications citing the use of Lipofectamine® family of reagents since 1996.
    [Show full text]
  • Lipofectamine Rnaimax Reagent Protocol
    Lipofectamine Rnaimax Reagent Protocol HunchbackedFranky backfill andhistogenetically coincidental whileIra supper asthmatic her gumboil Joshuah isobath sepulcher slavers safe and or embracedovereats decussately. disproportionably. conceptualizingUnelectrified Casper asthmatically machining or orpersonalize. escorts some shag resolvedly, however prospective Spense What help the best console to transfect cells after thawing them a best results? Your order can offer be completed at that time as your is any payment methods available send it. Bars represent average values derived from six independent replicas, and error bars represent the standard deviations. Systematic identification of novel protein domain families associated with nuclear functions. Remaining pulldown sample is used for immunoblotting against the protein of our in its potentially SUMOylated form. PKA, DNA PK, and TNFα. How can overall determine if dead cell down will be natural or challenging to transfect? Usually, the protocol that is supplied with the product will save an optimal range of transfection reagent to use. We suggest by first examine of any transfection optimization include the thorough literature search followed by consultation with a member demand the TDI HTS facility to narrow the globe before experiments begin. Wang X, Huang W, Liu G, Cai W, Millard RW, Wang Y, Chang J, Peng T, Fan GC. Sie eine der oberen Optionen. Before proceeding, please head that schedule are different real user. Purchase this article with family account. Access what society journal content varies across our titles. Rha SE, Byun JY, Jung SE, Chun HJ, Lee HG and Lee JM: Neurogenic tumors in the abdomen: tumor types and imaging characteristics. Levels Through DNA PK in Retinal Endothelial Cells Cultured in Hyperglycemic Conditions.
    [Show full text]
  • The Improvement of Liposome-Mediated Transfection of Pegfp DNA Into Human Prostate Cancer Cells by Combining Low-Frequency and Low-Energy Ultrasound with Microbubbles
    ONCOLOGY REPORTS 27: 475-480, 2012 The improvement of liposome-mediated transfection of pEGFP DNA into human prostate cancer cells by combining low-frequency and low-energy ultrasound with microbubbles WEN-ΚUN BAI*, ZUO-ΗUI WU*, E SHEN, JI-ΖHEN ZHANG and BING HU Department of Ultrasound in Medicine, Shanghai Jiao Tong University Affiliated 6th People's Hospital, Shanghai Institute of Ultrasound in Medicine, Shanghai 200233, P.R. China Received August 25, 2011; Accepted September 30, 2011 DOI: 10.3892/or.2011.1510 Abstract. The aim of this study was to explore the use of a measured and was approximately 81-fold greater than that of contrast agent to study the effects of exposure to ultrasound, in the control group. The use of low-frequency and low-energy combination with microbubbles, on liposome-mediated trans- ultrasound, in combination with microbubbles, could be a fection of genes into human prostate cancer cells. A contrast potent physical method for increasing liposome gene delivery agent was used to study the effects of ultrasound exposure in efficiency. This technique is a promising non-viral approach combination with microbubbles on liposomes, which transfect that can be used in prostate cancer gene therapy. genes into human prostate cancer cells. The human prostate cancer cell line PC-3 in suspension was exposed to ultrasound Introduction with a 20% duty cycle (i.e., 2 sec ‘on’ time and 8 sec ‘off’ time) lasting 5 min, with and without ultrasound contrast agent Prostate cancer was ranked first in incidence rate of cancers (SonoVue™) using a digital sonifier at a frequency of 21 kHz among men in the US in 2010, and its mortality was ranked and an intensity of 4.6 mW/cm2.
    [Show full text]
  • A New Method for Producing Transgenic Birds Via Direct in Vivo Transfection of Primordial Germ Cells
    A new method for producing transgenic birds via direct in vivo transfection of primordial germ cells Scott G. Tyack, Kristie A. Jenkins, Terri E. O’Neil, Terry G. Wise, Kirsten R. Morris, Matthew P. Bruce, Scott McLeod, et al. Transgenic Research Associated with the International Society for Transgenic Technologies (ISTT) ISSN 0962-8819 Volume 22 Number 6 Transgenic Res (2013) 22:1257-1264 DOI 10.1007/s11248-013-9727-2 1 23 Your article is protected by copyright and all rights are held exclusively by Springer Science +Business Media Dordrecht. This e-offprint is for personal use only and shall not be self- archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com”. 1 23 Author's personal copy Transgenic Res (2013) 22:1257–1264 DOI 10.1007/s11248-013-9727-2 BRIEF COMMUNICATION A new method for producing transgenic birds via direct in vivo transfection of primordial germ cells Scott G. Tyack • Kristie A. Jenkins • Terri E. O’Neil • Terry G. Wise • Kirsten R. Morris • Matthew P. Bruce • Scott McLeod • Alexander J. Wade • James McKay • Robert J. Moore • Karel A.
    [Show full text]
  • Sirna) Delivery Into Bovine Monocyte-Derived Macrophages by Transfection and Electroporation
    Edinburgh Research Explorer Comparison of small interfering RNA (siRNA) delivery into bovine monocyte-derived macrophages by transfection and electroporation Citation for published version: Jensen, K, Anderson, JA & Glass, EJ 2014, 'Comparison of small interfering RNA (siRNA) delivery into bovine monocyte-derived macrophages by transfection and electroporation', Veterinary Immunology and Immunopathology, vol. 158, no. 224-232, pp. 224-232. https://doi.org/10.1016/j.vetimm.2014.02.002 Digital Object Identifier (DOI): 10.1016/j.vetimm.2014.02.002 Link: Link to publication record in Edinburgh Research Explorer Document Version: Publisher's PDF, also known as Version of record Published In: Veterinary Immunology and Immunopathology Publisher Rights Statement: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). General rights Copyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy The University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 24. Sep. 2021 G Model VETIMM-9158; No. of Pages 9 ARTICLE IN PRESS Veterinary Immunology and Immunopathology xxx (2014) xxx–xxx Contents lists available at ScienceDirect Veterinary Immunology and Immunopathology j ournal homepage: www.elsevier.com/locate/vetimm Research paper Comparison of small interfering RNA (siRNA) delivery into bovine monocyte-derived macrophages by transfection and electroporation ∗ Kirsty Jensen , Jennifer A.
    [Show full text]
  • Stabilization of Poly (Β-Amino Ester) Nanoparticles for the Efficient
    bioengineering Article Stabilization of Poly (β-Amino Ester) Nanoparticles for the Efficient Intracellular Delivery of PiggyBac Transposon Tina Rodgers , Nicolas Muzzio , Caleb Watson and Gabriela Romero * Department of Biomedical Engineering and Chemical Engineering, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA; [email protected] (T.R.); [email protected] (N.M.); [email protected] (C.W.) * Correspondence: [email protected]; Tel.: +1-(210)-458-7982 Abstract: The administration of gene-editing tools has been proposed as a promising therapeutic approach for correcting mutations that cause diseases. Gene-editing tools, composed of relatively large plasmid DNA constructs that often need to be co-delivered with a guiding protein, are unable to spontaneously penetrate mammalian cells. Although viral vectors facilitate DNA delivery, they are restricted by the size of the plasmid to carry. In this work, we describe a strategy for the stable encapsulation of the gene-editing tool piggyBac transposon into Poly (β-amino ester) nanoparticles (NPs). We propose a non-covalent and a covalent strategy for stabilization of the nanoformulation to slow down release kinetics and enhance intracellular delivery. We found that the formulation prepared by covalently crosslinking Poly (β-amino ester) NPs are capable to translocate into the cytoplasm and nuclei of human glioblastoma (U87MG) cells within 1 h of co-culturing, without the need of a targeting moiety. Once internalized, the nanoformulation dissociates, delivering the plasmid presumably as a response to the intracellular acidic pH. Transfection efficiency is confirmed by green fluorescence protein (GFP) expression in U87MG cells.
    [Show full text]
  • Transfection Types, Methods and Strategies: a Technical Review
    Transfection types, methods and strategies: a technical review Zhi Xiong Chong1, Swee Keong Yeap2 and Wan Yong Ho1 1 School of Pharmacy, University of Nottingham Malaysia, Semenyih, Selangor, Malaysia 2 China-ASEAN College of Marine Sciences, Xiamen University Malaysia, Sepang, Selangor, Malaysia ABSTRACT Transfection is a modern and powerful method used to insert foreign nucleic acids into eukaryotic cells. The ability to modify host cells’ genetic content enables the broad application of this process in studying normal cellular processes, disease molecular mechanism and gene therapeutic effect. In this review, we summarized and compared the findings from various reported literature on the characteristics, strengths, and limitations of various transfection methods, type of transfected nucleic acids, transfection controls and approaches to assess transfection efficiency. With the vast choices of approaches available, we hope that this review will help researchers, especially those new to the field, in their decision making over the transfection protocol or strategy appropriate for their experimental aims. Subjects Biotechnology, Cell Biology, Molecular Biology Keywords Methods, Nucleic acids, Controls, Efficiency, Chemicals, Transfection INTRODUCTION Transfection is a process by which foreign nucleic acids are delivered into a eukaryotic cell to modify the host cell’s genetic makeup (Kim & Eberwine, 2010; Chow et al., 2016). For the past 30 years, transfection has gained increasing popularity due to its wide application for studying cellular processes and molecular mechanisms of diseases (Arnold et al., Submitted 22 July 2020 2006; Ishida & Selaru, 2012; Chow et al., 2016). Understanding the molecular pathway of Accepted 5 March 2021 fi Published 21 April 2021 disease allows the discovery of speci c biomarkers that may be applied to diagnose and prognose diseases (Ye et al., 2017; Roser et al., 2018).
    [Show full text]
  • Cationic Liposomes As Carriers for Gene Delivery: Physico-Chemical Characterization and Mechanism of Cell Transfection
    African Journal of Biotechnology Vol. 11(11), pp. 2763-2773, 7 February, 2012 Available online at http://www.academicjournals.org/AJB DOI: 10.5897/AJB11.3019 ISSN 1684–5315 © 2012 Academic Journals Full Length Research Paper Cationic liposomes as carriers for gene delivery: Physico-chemical characterization and mechanism of cell transfection Bing Wang1,2, Jiti Zhou1, Shaohui Cui2, Baoling Yang2, Yinan Zhao2, Budiao Zhao2, Yan Duan3 and Shubiao Zhang2* 1College of Environmental and Biological Science, Dalian University of Technology, Dalian 116024, Liaoning, China. 2SEAC-ME Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Nationalities University, Dalian 116600, Liaoning, China. 3Department of Pharmacy, National University of Singapore, Singapore 117543. Accepted 13 December, 2011 The inter-correlations among the parameters that influence the transfection efficiency of liposome-DNA complexes (lipoplexes) as carriers in gene therapy, optimum procedures for transfection and mechanism of cell transfection were investigated. The morphology, size and ζ-potential of liposomes and lipoplexes were measured by atomic force microscopy (AFM) and dynamic light scattering techniques. The lipoplexes formation was tested by using gel electrophoresis. Transfection efficiency was assessed using luciferase and green fluorescence protein reporter plasmids, respectively. It was found that transfection efficiency markedly depended on liposome to DNA weight ratio, lipoplexes morphology and size. The intracellular trafficking of exogenous DNAs was observed by confocal laser microscopy. After 4 h incubation, DNAs delivered by Lipofectamine 2000 reached the nucleus with a much higher frequency than 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP). It was concluded that lipoplexes with filaments contributing more than globular obtained higher transfection efficiency with the maximum expression of 500000 RLU/mg luciferase in HeLa cells, for they are easy to release pDNA after endocytosis.
    [Show full text]