کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10160451 | 120 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Localized delivery of nitric oxide from hydrogels inhibits neointima formation in a rat carotid balloon injury model
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Localized delivery of nitric oxide from hydrogels inhibits neointima formation in a rat carotid balloon injury model Localized delivery of nitric oxide from hydrogels inhibits neointima formation in a rat carotid balloon injury model](/preview/png/10160451.png)
چکیده انگلیسی
Using novel nitric oxide (NO)-generating polymeric hydrogels that can be rapidly photopolymerized in situ, we can deliver NO locally at the site of vascular injury. Depending on material design, these poly(ethylene glycol) (PEG)-based hydrogels can generate NO for up to 50 d. This study demonstrates the ability of nitric oxide-generating hydrogels (PEG-Cys-NO) to influence key components of the restenosis cascade both in vitro and in vivo. PEG-Cys-NO hydrogels inhibited smooth muscle cell proliferation, increased endothelial cell proliferation, and inhibited platelet adhesion in vitro. Moreover, in vivo, PEG-Cys-NO hydrogels inhibited intimal thickening in a rat carotid balloon injury model. The perivascular application of NO-generating polymers post-injury reduced neointima formation at 14 d by approximately 80% compared to controls (intimal area/medial area (I/M): PEG-Cys-NO = 0.20 ± 0.17, control = 0.84 ± 0.19, p < 0.00002; intimal thickness: PEG-Cys-NO = 12 ± 10 μm, control = 60 ± 18 μm, p < 0.00002). Treatment with the PEG-Cys-NO hydrogels caused a significant decrease in the per cent of proliferating cell nuclear antigen positive medial cells (29 ± 5%) at 4 d as compared to treatment with the control hydrogels (51 ± 1%, p < 0.02). Additionally, vessel re-endothelialization at 14 d was slightly enhanced in the presence of the NO-generating hydrogels. These data indicate that localized delivery of NO from these hydrogels can significantly inhibit neointima formation in a rat carotid balloon injury model and suggest that these materials may be useful in preventing restenosis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Biomaterialia - Volume 1, Issue 6, November 2005, Pages 597-606
Journal: Acta Biomaterialia - Volume 1, Issue 6, November 2005, Pages 597-606
نویسندگان
Elizabeth A. Lipke, Jennifer L. West,