Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Paclitaxel Coating Inhibits Inflammation Surrounding Subcutaneously Implanted Expanded Polytetrafluoroethylene (ePTFE) Hemodialysis Grafts in Rabbit Model

  • Baek, In-Su (School of Chemistry & Molecular Engineering, Seoul National University) ;
  • Lee, Yu-Ji (Division of Nephrology, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Park, Soo-Jin (Division of Nephrology, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Bai, Cheng Zhe (School of Chemistry & Molecular Engineering, Seoul National University) ;
  • Park, Jong-Sang (School of Chemistry & Molecular Engineering, Seoul National University) ;
  • Kim, Dae-Joong (Division of Nephrology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • Published : 2010.02.20
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Abstract

Hemodialysis vascular access dysfunction (HVAD) due to the aggressive development of venous neointimal hyperplasia remains a major complication for patients with synthetic arteriovenous grafts. Paclitaxel-coated expanded polytetrafluoroethylene (ePTFE) grafts effectively prevent neointimal hyperplasia and stenosis. However, perigraft inflammation or edema can be another complication of ePTFE grafts, preventing early cannulation. Three different types of ePTFE grafts, including grafts without paclitaxel coating (control group, n = 12), grafts with paclitaxel coating at a dose density of $0.61ug/mm^2$ (low concentration group, n = 12), and grafts with paclitaxel coating at a dose density of $1.15ug/mm^2$ (high concentration group, n = 12) were placed in the backs of 12 rabbits, simultaneously. Six rabbits were euthanized after one week and the remaining six were euthanized two weeks after implantation. Perigraft inflammation, graft wall inflammation, stromal cell proliferation, blood vessel formation, tissue necrosis and edema were analyzed for the grafts in each animal. Inflammation surrounding the paclitaxel-coated grafts was significantly reduced compared to the control group. Stromal cell layers were detected at the interface between the graft and the surrounding tissue in the control group, infiltrated into the graft interstices, and differentiated into myofibroblasts for graft healing. Paclitaxel-coated grafts inhibited stromal cell proliferation and infiltration into the graft wall. Tissue necrosis and edema were not detected in either of the paclitaxel-coated graft groups.

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