| 1. |
- Lin, Xue, et al.
(författare)
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Controlled release of matrix metalloproteinase-1 plasmid DNA prevents left ventricular remodeling in chronic myocardial infarction of rats.
- 2009
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Ingår i: Circulation journal : official journal of the Japanese Circulation Society. - 1347-4820. ; 73:12, s. 2315-21
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The present study investigated whether administration of controlled release matrix metalloproteinase-1 (MMP-1) plasmid DNA prevents left ventricular (LV) remodeling in a rat chronic myocardial infarction (MI) model. METHODS AND RESULTS: Rats with a moderate-sized MI were randomized to 2 groups: injection of phosphate buffered saline (PBS) containing microspheres into the peri-infarct area (MI group, n=14) and injection of cationized gelatin microspheres incorporating MMP-1 plasmid DNA (MI+MMP-1 group, 50 microg MMP-1/20 microl; n=14). As a control group (n=14), rats received neither the coronary artery ligation nor the injection of PBS. Echocardiography, cardiac catheterization and histological studies were performed. At 2 and 4 weeks after the treatment, the MI+MMP-1 group had smaller LV end-diastolic and end-systolic dimensions, better fractional area change and smaller akinetic areas than the MI group. The LV end-systolic elastance and time constant of isovolumic relaxation were also better in the MI+MMP-1 group compared with the MI group 4 weeks after the treatment. Fibrosis evaluated with Masson's trichrome staining was less in the MI+MMP-1 group than the MI group. CONCLUSIONS: Gelatin microspheres for the controlled release of MMP-1 plasmid DNA are promising for improving cardiac remodeling and function when they are administered during the chronic phase of MI.
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| 2. |
- Lin, Xue, et al.
(författare)
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Controlled release of matrix metalloproteinase 1 with or without skeletal myoblasts transplantation improves cardiac function of rat hearts with chronic myocardial infarction.
- 2009
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Ingår i: Tissue engineering. Part A. - : Mary Ann Liebert Inc. - 1937-335X .- 1937-3341. ; 15:9, s. 2699-706
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Tidskriftsartikel (refereegranskat)abstract
- Skeletal myoblast transplantation has been applied clinically for severe ischemic cardiomyopathy. Matrix metalloproteinase 1 (MMP-1) reduces fibrosis and prevents the progress of heart failure. We hypothesized that MMP-1 administration to the infarct area enhances the efficacy of skeletal myoblast transplantation. The controlled release of MMP-1 improved cardiac functions of rats with chronic myocardiac infarction with or without transplantation of skeletal myoblasts. Improvement in cardiac function and small fibrotic area inside the infarcted area were observed compared with those of myoblast transplantation. In conclusion, controlled release of MMP-1 was effective in cardioprotection in postmyocardial infarction although the combination with cell transplantation showed the similar effect.
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| 3. |
- Mindemark, Jonas, et al.
(författare)
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Low Charge Density Cationic Polymers for Gene Delivery : Exploring the Influence of Structural Elements on In Vitro Transfection
- 2012
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Ingår i: Macromolecular Bioscience. - : Wiley-VCH Verlagsgesellschaft. - 1616-5187 .- 1616-5195. ; 12:6, s. 840-848
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Tidskriftsartikel (refereegranskat)abstract
- A series of end-functionalized poly(trimethylene carbonate) DNA carriers, characterized by low cationic charge density and pronounced hydrophobicity, was used to study structural effects on in vitro gene delivery. As the DNA-binding moieties were identical in all polymer structures, the differences observed between the different polymers were directly related to the functionality and length of the polymer backbone. The transfection efficiency and cytotoxicity of the polymer/DNA complexes were thus found to be dependent on a combination of polymer charge density and functionality, highlighting the importance of such structural considerations in the development of materials for efficient gene delivery.
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