~(103)Pd支架预防支架内再狭窄的量效及机制The dose-effect and its mechanisms of preventive effects of 103 Pd radioactive stent on in-stent restenosis in rabbits
陈纪言,严红,林曙光,林秋雄,余丹青
摘要(Abstract):
目的 探讨1 0 3Pd支架对血管成形术后再狭窄的预防作用的量效关系及其机制。方法 5 0只雄性新西兰白兔随机分为普通支架组和各剂量的核素支架组 (8只 组 )。支架置入术后 8周行腹主动脉血管内超声和造影检查、行免疫组化染色并检测细胞凋亡。结果 在核素支架组 ,随剂量增加 ,支架段最小内径和支架内管腔面积均增大而狭窄程度减小。核素支架各组增殖细胞核抗原(PCNA)阳性细胞率均显著小于普通支架组 ,而凋亡指数除 5Gy组外均显著大于普通支架组。结论 1 0 3 Pd支架可抑制支架内血管内膜的增生 ,减少支架内狭窄的程度 ,显示出量效关系。1 0 3Pd支架既抑制血管平滑肌细胞 (VSMC)增生也诱导细胞凋亡。
关键词(KeyWords): 再狭窄;钯;放射治疗;支架
基金项目(Foundation): 广东省医学科研基金 (A2 0 0 10 12 )
作者(Author): 陈纪言,严红,林曙光,林秋雄,余丹青
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