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- W2003050591 abstract "We investigated whether targeted cleavage of PAI-1 mRNA might prevent post-angioplasty neointima formation in diabetic JCR:LA-cp/cp rats with naturally elevated PAI-1 levels. Catalytic DNA enzymes targeting rat PAI-1 mRNA (PAI-1 DNA enzyme, n = 12) or a random sequence as control (scrambled DNA enzyme, n = 12) were infused at the site of arterial damage. Control animals demonstrated prominent PAI-1 protein expression in the arterial endothelium at 48 hours, and robust neointimal proliferation by two weeks, with 60 ± 10% mean occlusion of the artery lumen. The neointimal lesion consisted of dense fibrin deposition and numerous proliferating smooth muscle cells, as determined by dual α-smooth muscle actin/Ki67 expression. Treatment with PAI-1 DNA enzyme resulted in marked early (48 hour) reduction of endothelial PAI-1 protein expression, which persisted for the next two weeks as well as a two fold reduction of expression of PAI-1 mRNA by RT-PCR at the same time point, (P < 0.05). By two weeks, PAI-1 DNA enzyme treated animals demonstrated significantly reduced levels of fibrin deposition and 5-fold lower levels of proliferating smooth muscle cells at the site of arterial injury compared to controls (P < 0.01), and a 2-fold lower neointima/media ratio (0.67 ± 0.11 vs 1.39 ± 0.12) (P < 0.05). Treatment with a catalytic PAI-1 DNA enzyme successfully prevents neointimal proliferation after balloon injury in diabetic animals." @default.
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- W2003050591 date "2007-12-01" @default.
- W2003050591 modified "2023-10-03" @default.
- W2003050591 title "A DNA Enzyme Against Plasminogen Activator Inhibitor- type 1 (PAI-1) Limits Neointima Formation After Angioplasty in an Obese Diabetic Rodent Model" @default.
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- W2003050591 doi "https://doi.org/10.1097/fjc.0b013e318150d6b3" @default.
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