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Published on: August 12, 2014
Vascular Applications of Human Gene Therapy
Pickering1, Takeshita, Feldman
1Departments of Medicine (Cardiology) and Biomedical Research, St. Elizabeth's Hospital, Tufts University School of Medicine, Boston, Massachusetts.
Journal of Thrombosis and Thrombolysis
|January 1, 1995
Summary
Liposome-mediated gene transfer (lipofection) into human vascular cells is inefficient. Success depends on cell type, with restenotic cells showing higher transfection rates and cell growth influencing gene delivery.
Area of Science:
- Molecular Biology
- Cardiovascular Research
- Gene Therapy
Background:
- Lipofection offers a method for gene transfer into cells, with potential applications in modifying diseased blood vessels.
- The efficiency of lipofection is significantly influenced by the cell type being transfected.
- Understanding cell-specific factors is crucial for improving gene transfer efficacy.
Purpose of the Study:
- To evaluate the efficiency of lipofection in primary human vascular smooth muscle cells from different sources.
- To investigate factors influencing gene transfer success in vascular cells.
- To compare transfection rates in normal, atherosclerotic, and restenotic vascular tissues.
Main Methods:
- Transfection of human vascular smooth muscle cells (from internal mammary arteries, atherosclerotic plaque, and restenotic lesions) using plasmids encoding luciferase or beta-galactosidase.
- Comparison of transfection efficiency with NIH 3T3 cells and rabbit vascular smooth muscle cells.
- Analysis of the mitotic index of transfected cells and assessment of co-transfection efficiency.
Main Results:
- Human vascular smooth muscle cells exhibited markedly reduced gene expression compared to NIH 3T3 cells (123-fold lower for luciferase, 30-fold lower for beta-galactosidase).
- Cells derived from restenotic lesions showed significantly higher luciferase expression than those from primary atherosclerotic plaque.
- Cells expressing recombinant genes had a significantly higher mitotic index than the total cell population (p < 0.05).
- Co-transfection experiments demonstrated that 23-36% of positive transfectants coexpressed both introduced genes.
Conclusions:
- Lipofection efficiency in human vascular smooth muscle cells in vitro is generally low.
- Transfection is preferentially facilitated in cells derived from restenotic tissue.
- Cellular properties, particularly growth rates, are critical determinants for successful liposome-mediated gene transfer in human vascular cells.
- Further research is needed to identify and leverage cell-specific properties to enhance gene transfer efficiency.
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