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- W1969981124 abstract "Restenosis after the implantation of a drug-eluting stent or after vascular irradiation therapy shares similar physiopathological mechanisms. No experimental data are currently available on vascular wall behavior after external irradiation on arteries stented with sirolimus-eluting stents (SES). Ten New Zealand white rabbits received a 0.5% cholesterol-enriched chow for 1 month. Bilateral iliac artery stent implantation was then performed with an SES (Cypher; Cordis Corp). The animals were randomized into either an irradiated group (I, 2 Gy external x-ray irradiation, n = 5) or a control group (C, n = 5). The cholesterol-enriched chow was continued for 1 additional month after stent implantation. The stented arteries were harvested for histological analyses. The number and the percentage of incompletely apposed stents struts (IASS) were significantly higher in irradiated versus control group (3.05 ± 0.46 vs. 1.57 ± 0.27 IASS, P < 0.01, and 28.44% ± 3.97% vs. 15.2% ± 2.46% of IASS, P < 0.01, respectively). The mean neointimal thickness behind the IASS was also higher in the irradiated group (I: 28.3 ± 2.5 μm vs. C: 18.2 ± 2.3 μm, P < 0.01). Re-endothelialization was lower in irradiated group (I: 44.6% ± 17.5% vs. C: 75.2% ± 5.7%, P < 0.01). The present study revealed that low-dose external irradiation increased incomplete stent apposition and reduced re-endothelialization of SES. These results underscore the potential deleterious cumulative side effects of these 2 procedures to prevent restenosis." @default.
- W1969981124 created "2016-06-24" @default.
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- W1969981124 date "2009-04-01" @default.
- W1969981124 modified "2023-09-25" @default.
- W1969981124 title "Combining Sirolimus-eluting Stents and External Irradiation in Cholesterol-fed Rabbits Increased Incomplete Stent Apposition and Decreased Re-endothelialization" @default.
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- W1969981124 doi "https://doi.org/10.1097/fjc.0b013e31819f1bca" @default.
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