首页> 外文期刊>Physiological Research >Attachment of Human Endothelial Cells to Polyester Vascular Grafts: Pre-Coating With Adhesive Protein Assemblies and Resistance to Short-Term Shear Stress
【24h】

Attachment of Human Endothelial Cells to Polyester Vascular Grafts: Pre-Coating With Adhesive Protein Assemblies and Resistance to Short-Term Shear Stress

机译:人内皮细胞对聚酯血管移植物的附着:预先涂有粘附性蛋白组装和对短期剪切应力的抵抗力。

获取原文
获取原文并翻译 | 示例
           

摘要

Cardiovascular prosthetic bypass grafts do not endothelialize spontaneously in humans, and so they pose a thrombotic risk. Seeding with cells improves their performance, particularly in small-caliber applications. Knitted tubular polyethyleneterephthalate (PET) vascular prostheses (6 mm) with commercial type I collagen (PET/Co) were modified in the lumen by the adsorption of laminin (LM), by coating with a fibrin network (Fb) or a combination of Fb and fibronectin (Fb/FN). Primary human saphenous vein endothelial cells were seeded (1.50 × 10~5/cm~2), cultured for 72 h and exposed to laminar shear stress 15 dyn/cm~2 for 40 and 120 min. The control static grafts were excluded from shearing. The cell adherence after 4 h on PET/Co, PET/Co +LM, PET/Co +Fb and PET/Co +Fb/FN was 22 %, 30 %, 19 % and 27 % of seeding, respectively. Compared to the static grafts, the cell density on PET/Co and PET/Co +LM dropped to 61 % and 50 %, respectively, after 120 min of flow. The cells on PET/Co +Fb and PET/Co +Fb/FN did not show any detachment during 2 h of shear stress. Pre-coating the clinically-used PET/Co vascular prosthesis with LM or Fb/FN adhesive protein assemblies promotes the adherence of endothelium. Cell retention under flow is improved particularly on fibrin-containing (Fb and Fb/FN) surfaces.
机译:心血管假体旁路移植物不能在人类中自发地内皮化,因此存在血栓形成的风险。用细胞播种可改善其性能,特别是在小口径应用中。通过吸附层粘连蛋白(LM),涂有血纤蛋白网(Fb)或Fb的组合在管腔中修饰具有商业I型胶原蛋白(PET / Co)的针织管状聚对苯二甲酸乙二醇酯(PET)血管假体(6 mm)和纤连蛋白(Fb / FN)。接种人大隐静脉内皮细胞(1.50×10〜5 / cm〜2),培养72小时,并在15 dyn / cm〜2的层流切应力下作用40和120分钟。将对照静态移植物排除在剪切之外。 4小时后,在PET / Co,PET / Co + LM,PET / Co + Fb和PET / Co + Fb / FN上的细胞粘附分别为接种的22%,30%,19%和27%。与静态移植物相比,流动120分钟后,PET / Co和PET / Co + LM上的细胞密度分别降至61%和50%。 PET / Co + Fb和PET / Co + Fb / FN上的细胞在2 h剪切应力下未显示任何脱离。用LM或Fb / FN粘附蛋白组件预涂临床使用的PET / Co血管假体可促进内皮细胞的粘附。流动下的细胞保留特别是在含血纤蛋白的表面(Fb和Fb / FN)上得到了改善。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号