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• W2019938864 abstract "Objective: Nitric oxide has been reported to reduce intimal hyperplasia as a response to arterial injury. This study was designed to assess the possible effect of perivascular application of a nitric oxide donor on neointimal proliferation occurring in veins exposed to the dynamics of the arterial circulation in a hypercholesterolemic rabbit model. Methods: Autologous jugular vein grafts were implanted in the carotid circulation of 20 hypercholesterolemic rabbits. A mixture of a biodegradable polymer and the nitric oxide donor, spermine/nitric oxide, which releases nitric oxide with a half-life of 39 minutes, was applied periadventitially at the time of implantation. Controls were veins bathed in saline solution, polymer alone, and polymer plus the carrier vehicle spermine without nitric oxide. Animals (n = 5 in each group) were put to death on day 28 for morphometric analysis, cell count, and immunohistochemical staining. Results: Treatment with perivascular nitric oxide donor significantly decreased wall thickness (126 ± 24 μm vs 208 ± 45 μm, p = 0.0017) and area (124 ± 22 μm2/μm vs 211 ± 37 μm2/μm, p = 0.005). With the carrier vehicle spermine alone, there was a trend toward reduced intimal thickness, but the change was not statistically significant. In the grafts treated with nitric oxide donor, expression of insulin-like growth factor, fibroblast growth factor, thrombospondins, fibronectin, and tenascin was reduced. Conclusion: The periadventitial delivery of nitric oxide donor produces a reduction of neointimal hyperplasia in veins implanted in the arterial circulation. The mechanism of action is not entirely clear, but the reduction cannot be explained on the basis of decreased cell proliferation alone. Other possibilities are modulation of protein synthesis of vascular smooth muscle cells and production of extracellular matrix components. (J Thorac Cardiovasc Surg 1998;115:604-14)" @default.
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• W2019938864 date "1998-03-01" @default.
• W2019938864 modified "2023-10-10" @default.
• W2019938864 title "Perivascular Delivery Of A Nitric Oxide Donor Inhibits Neointimal Hyperplasia In Vein Grafts Implanted In The Arterial Circulation" @default.
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• W2019938864 doi "https://doi.org/10.1016/s0022-5223(98)70325-3" @default.
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