Minicircle Mediated Gene Delivery to Canine and Equine Mesenchymal Stem Cells.
Abstract: Gene-directed tissue repair offers the clinician, human or veterinary, the chance to enhance cartilage regeneration and repair at a molecular level. Non-viral plasmid vectors have key biosafety advantages over viral vector systems for regenerative therapies due to their episomal integration however, conventional non-viral vectors can suffer from low transfection efficiency. Our objective was to identify and validate in vitro a novel non-viral gene expression vector that could be utilized for ex vivo and in vivo delivery to stromal-derived mesenchymal stem cells (MSCs). Minicircle plasmid DNA vector containing green fluorescent protein (GFP) was generated and transfected into adipose-derived MSCs from three species: canine, equine and rodent and transfection efficiency was determined. Both canine and rat cells showed transfection efficiencies of approximately 40% using minicircle vectors with equine cells exhibiting lower transfection efficiency. A -expressing minicircle vector was generated and transfected into canine MSCs. Successful transfection of the minicircle- vector was confirmed in canine cells by Sox9 immunostaining. This study demonstrate the application and efficacy of a novel non-viral expression vector in canine and equine MSCs. Minicircle vectors have potential use in gene-directed regenerative therapies in non-rodent animal models for treatment of cartilage injury and repair.
Publication Date: 2017-04-12 PubMed ID: 28417917PubMed Central: PMC5412403DOI: 10.3390/ijms18040819Google Scholar: Lookup
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- Journal Article
Summary
This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.
This research presents the successful usage of a new non-viral gene expression vector in canine and equine stem cells. The specific vector, called a minicircle vector, holds potential for advancement in gene-focused regenerative therapies, especially those treating cartilage damage and repair.
Objective of the Research
- The main focus of this study was to find and validate a new type of non-viral gene expression vector that could be effectively used for in vitro, ex vivo, and in vivo delivery to mesenchymal stem cells (MSCs). These cells originate from the stroma, the connective tissue that surrounds other tissues and organs.
Minicircle Vector and Its Advantages
- The research utilized a minicircle plasmid DNA vector. Plasmids are small, circular pieces of DNA that are not part of a bacterium’s main chromosome and are capable of replicating independently.
- The particular minicircle vector used in the research featured the green fluorescent protein (GFP) – a useful tool in cell biology research as it emits a green glow when exposed to blue light, which helps in visualizing genes.
- Minicircles have significant biosafety benefits over viral vector systems, primarily due to their episomal integration. This means they remain separate from the host cell’s own DNA, reducing the risk of unintentionally turning on/off any host genes. This is a common disadvantage of many viral vectors.
- The traditional non-viral vectors often suffer from low transfection efficiency, implying that they’re unable to introduce their DNA into cells effectively. The minicircle vector apparently overcomes this issue, which makes it a potentially revolutionary tool in gene therapy.
Results of the Study
- The research used MSCs derived from three species: dogs (canine), horses (equine), and rodents for the experiment.
- The minicircle vectors showed roughly 40% transfection efficiency in both canine and rodent cells. Although the efficiency was significantly lower in the equine cells, the research proved successful overall.
- In addition, the study generated a Sox9-expressing minicircle vector. Sox9 is a gene that is important for cartilage formation and validated its successful transfection into the canine MSCs.
Implications of the Research
- The results demonstrate that minicircle vectors can potentially revolutionize gene-directed regenerative therapies, primarily in non-rodent animal models. This involves the use of MSCs to help repair or replace damaged tissues in the body.
Cite This Article
APA
Tidd N, Michelsen J, Hilbert B, Quinn JC.
(2017).
Minicircle Mediated Gene Delivery to Canine and Equine Mesenchymal Stem Cells.
Int J Mol Sci, 18(4), 819.
https://doi.org/10.3390/ijms18040819 Publication
Researcher Affiliations
- School of Animal and Veterinary Science, Charles Sturt University, Boorooma Street, Locked Bag 588, Wagga Wagga, NSW 2678, Australia. ntidd@csu.edu.au.
- School of Animal and Veterinary Science, Charles Sturt University, Boorooma Street, Locked Bag 588, Wagga Wagga, NSW 2678, Australia. jmichelsen@csu.edu.au.
- School of Animal and Veterinary Science, Charles Sturt University, Boorooma Street, Locked Bag 588, Wagga Wagga, NSW 2678, Australia. bhilbert@csu.edu.au.
- School of Animal and Veterinary Science, Charles Sturt University, Boorooma Street, Locked Bag 588, Wagga Wagga, NSW 2678, Australia. jquinn@csu.edu.au.
- Graham Centre for Agricultural Innovation (NSW Department of Primary Industries and Charles Sturt University), Wagga Wagga, NSW 2678 Australia. jquinn@csu.edu.au.
MeSH Terms
- Animals
- Biomarkers
- Cell Differentiation / genetics
- Cell Line
- Chondrogenesis / genetics
- Dogs
- Gene Expression
- Gene Transfer Techniques
- Genes, Reporter
- Genetic Vectors / genetics
- Horses
- Humans
- Mesenchymal Stem Cells / cytology
- Mesenchymal Stem Cells / metabolism
- Rats
- SOX9 Transcription Factor / genetics
- SOX9 Transcription Factor / metabolism
- Transfection / methods
- Transgenes
Conflict of Interest Statement
The authors declare no conflict of interest.
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