Adam B Levitt , Keith Robinson , Eric Wellons , Kin Man Lai , Jian Hua Cui , Brian Gannon , David Rosenthal
{"title":"预防内膜增生","authors":"Adam B Levitt , Keith Robinson , Eric Wellons , Kin Man Lai , Jian Hua Cui , Brian Gannon , David Rosenthal","doi":"10.1016/j.carrad.2004.03.002","DOIUrl":null,"url":null,"abstract":"<div><h3>Objective</h3><p>Endovascular brachytherapy, delivered by a variety of catheter-based devices, has proven clinically effective for the inhibition of neointimal hyperplasia (NIH) after coronary and peripheral balloon/stent angioplasty. No platform, however, has been developed to deliver low-dose radiation in concert with vascular surgical operations. The purpose of this study was to evaluate the vascular response following balloon injury to the rabbit carotid artery, with and without topical low-dose <sup>45</sup>Ca, applied by an external vascular “wrap”.</p></div><div><h3>Methods</h3><p>Twelve rabbit carotid arteries were subjected to balloon injury by embolectomy catheter. The common carotid artery was then “wrapped” circumferentially with a biostable polyurethane membrane (Nanoskin Secant Medical, Perkasie, PA), without radiation (<em>n</em>=6), or with radiation (<em>n</em>=6) (<sup>45</sup>Ca ∼50 μCi). The animals were sacrificed at 4 weeks for histologic assessment of the treated vessels.</p></div><div><h3>Results</h3><p>The <sup>45</sup>Ca wrap inhibited NIH evidenced by trends towards reduction of intimal area (0.46±0.19 control carotid vs. 0.35±0.15 <sup>45</sup>Ca-treated carotid arteries; <em>P</em>=.11), maximal intimal thickness (0.21±0.08 vs. 0.16±0.05; <em>P</em>=.12), average intimal thickness (0.12±0.06 vs. 0.08±0.03; <em>P</em>=.08), marginally significant reduction in percent area stenosis (33±15% vs. 21±9%; <em>P</em>=.06) and marked neointima suppression in areas immediately adjacent to <sup>45</sup>Ca wrap remnants. Medial necrosis (<em>P</em>=.003), however, was observed slightly more for <sup>45</sup>Ca-treated carotid arteries versus control arteries.</p></div><div><h3>Conclusion</h3><p>Low-dose <sup>45</sup>Ca beta-radiation labeled onto a polyurethane membrane appears to inhibit NIH in an animal model.</p></div>","PeriodicalId":80261,"journal":{"name":"Cardiovascular radiation medicine","volume":"5 1","pages":"Pages 34-37"},"PeriodicalIF":0.0000,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.carrad.2004.03.002","citationCount":"6","resultStr":"{\"title\":\"Prevention of intimal hyperplasia\",\"authors\":\"Adam B Levitt , Keith Robinson , Eric Wellons , Kin Man Lai , Jian Hua Cui , Brian Gannon , David Rosenthal\",\"doi\":\"10.1016/j.carrad.2004.03.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Objective</h3><p>Endovascular brachytherapy, delivered by a variety of catheter-based devices, has proven clinically effective for the inhibition of neointimal hyperplasia (NIH) after coronary and peripheral balloon/stent angioplasty. No platform, however, has been developed to deliver low-dose radiation in concert with vascular surgical operations. The purpose of this study was to evaluate the vascular response following balloon injury to the rabbit carotid artery, with and without topical low-dose <sup>45</sup>Ca, applied by an external vascular “wrap”.</p></div><div><h3>Methods</h3><p>Twelve rabbit carotid arteries were subjected to balloon injury by embolectomy catheter. The common carotid artery was then “wrapped” circumferentially with a biostable polyurethane membrane (Nanoskin Secant Medical, Perkasie, PA), without radiation (<em>n</em>=6), or with radiation (<em>n</em>=6) (<sup>45</sup>Ca ∼50 μCi). The animals were sacrificed at 4 weeks for histologic assessment of the treated vessels.</p></div><div><h3>Results</h3><p>The <sup>45</sup>Ca wrap inhibited NIH evidenced by trends towards reduction of intimal area (0.46±0.19 control carotid vs. 0.35±0.15 <sup>45</sup>Ca-treated carotid arteries; <em>P</em>=.11), maximal intimal thickness (0.21±0.08 vs. 0.16±0.05; <em>P</em>=.12), average intimal thickness (0.12±0.06 vs. 0.08±0.03; <em>P</em>=.08), marginally significant reduction in percent area stenosis (33±15% vs. 21±9%; <em>P</em>=.06) and marked neointima suppression in areas immediately adjacent to <sup>45</sup>Ca wrap remnants. Medial necrosis (<em>P</em>=.003), however, was observed slightly more for <sup>45</sup>Ca-treated carotid arteries versus control arteries.</p></div><div><h3>Conclusion</h3><p>Low-dose <sup>45</sup>Ca beta-radiation labeled onto a polyurethane membrane appears to inhibit NIH in an animal model.</p></div>\",\"PeriodicalId\":80261,\"journal\":{\"name\":\"Cardiovascular radiation medicine\",\"volume\":\"5 1\",\"pages\":\"Pages 34-37\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2004-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.carrad.2004.03.002\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cardiovascular radiation medicine\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1522186504000137\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cardiovascular radiation medicine","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1522186504000137","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Endovascular brachytherapy, delivered by a variety of catheter-based devices, has proven clinically effective for the inhibition of neointimal hyperplasia (NIH) after coronary and peripheral balloon/stent angioplasty. No platform, however, has been developed to deliver low-dose radiation in concert with vascular surgical operations. The purpose of this study was to evaluate the vascular response following balloon injury to the rabbit carotid artery, with and without topical low-dose 45Ca, applied by an external vascular “wrap”.
Methods
Twelve rabbit carotid arteries were subjected to balloon injury by embolectomy catheter. The common carotid artery was then “wrapped” circumferentially with a biostable polyurethane membrane (Nanoskin Secant Medical, Perkasie, PA), without radiation (n=6), or with radiation (n=6) (45Ca ∼50 μCi). The animals were sacrificed at 4 weeks for histologic assessment of the treated vessels.
Results
The 45Ca wrap inhibited NIH evidenced by trends towards reduction of intimal area (0.46±0.19 control carotid vs. 0.35±0.15 45Ca-treated carotid arteries; P=.11), maximal intimal thickness (0.21±0.08 vs. 0.16±0.05; P=.12), average intimal thickness (0.12±0.06 vs. 0.08±0.03; P=.08), marginally significant reduction in percent area stenosis (33±15% vs. 21±9%; P=.06) and marked neointima suppression in areas immediately adjacent to 45Ca wrap remnants. Medial necrosis (P=.003), however, was observed slightly more for 45Ca-treated carotid arteries versus control arteries.
Conclusion
Low-dose 45Ca beta-radiation labeled onto a polyurethane membrane appears to inhibit NIH in an animal model.
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