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- W2106530187 abstract "The migration and proliferation of myofibroblasts are prominent features of myointimal hyperplasia associated with haemodialysis polytetrafluoroethylene (PTFE) grafts. Since C-reactive protein (CRP) possesses functional activities on vascular smooth muscle cells (SMCs), we examined the expression of this protein in PTFE grafts early in the course of myointimal hyperplasia development in a porcine model.Bilateral carotid-jugular PTFE loop grafts were placed in pigs. After euthanasia at 2-4 weeks, the graft-venous and graft-arterial anastomoses and the adjacent blood vessels were excised en bloc and subjected to immunohistochemical analyses and in situ hybridization for CRP. The ability of CRP to stimulate proliferation was examined in cultured porcine venous SMCs using the bromodeoxyuridine assay after incubation for 48 h.Severe myointimal hyperplasia was found at 3 weeks after graft placement at both graft-venous and graft-arterial anastomoses. Compared to normal tissues, staining for CRP was far more intense in cells in the hyperplastic lesions at both anastomoses, which also stained positive for smooth muscle alpha-actin. In situ hybridization showed that these cells also expressed mRNA for CRP. At 1 microg/ml, CRP increased the proliferation of cultured porcine venous SMCs by 45.9+/-5.8%.CRP was produced in venous and arterial SMCs and its expression was enhanced in the hyperplastic lesions associated with arteriovenous PTFE grafts in a porcine model. Together with the ability of CRP to promote SMC proliferation, these data suggest that CRP might play a pathogenic role in the development of myointimal hyperplasia in PTFE grafts." @default.
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- W2106530187 date "2007-06-05" @default.
- W2106530187 modified "2023-09-25" @default.
- W2106530187 title "Expression of C-reactive protein in myointimal hyperplasia in a porcine arteriovenous graft model" @default.
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- W2106530187 doi "https://doi.org/10.1093/ndt/gfm240" @default.
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