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Endothelial Cells Guided by Immobilized Gradients of Vascular Endothelial Growth Factor on Porous Collagen Scaffolds.

机译:血管内皮生长因子固定在多孔胶原蛋白支架上的梯度引导的内皮细胞。

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摘要

A key challenge in tissue engineering is overcoming cell death in the scaffold interior due to the limited diffusion of oxygen and nutrients therein. We hypothesized here that immobilizing a gradient of vascular endothelial growth factor (VEGF-165) would guide endothelial cells into the interior of the scaffold thereby enhancing angiogenesis. The protein was immobilized onto a collagen scaffold through carbodiimide chemistry by one of the three methods experimented: placing 5 microl of the solution at the center of the scaffold to create a ∼2 ng/ml/mm gradient in a radial direction. D4T endothelial cells were observed to be guided by this VEGF-165 gradient deep into the center of the scaffold compared to both uniformly immobilized VEGF-165 and VEGF-free controls. We concluded that the VEGF-165 gradient scaffolds promoted the migration, and not proliferation, of cells deep into the scaffold. These gradient scaffolds provide the foundation for future in vivo tissue engineering studies.
机译:组织工程中的关键挑战是克服支架内部的细胞死亡,这是由于氧气和营养素在其中的有限扩散所致。我们在这里假设固定梯度的血管内皮生长因子(VEGF-165)将引导内皮细胞进入支架内部,从而增强血管生成。通过以下三种方法之一,通过碳二亚胺化学将蛋白质固定在胶原蛋白支架上:将5微升溶液置于支架的中央,沿径向方向形成约2 ng / ml / mm的梯度。与均匀固定的VEGF-165和不含VEGF的对照相比,观察到D4T内皮细胞受该VEGF-165梯度深入支架中心的引导。我们得出的结论是,VEGF-165梯度支架促进了细胞深入支架的迁移,而不是增殖。这些梯度支架为将来的体内组织工程研究提供了基础。

著录项

  • 作者

    Odedra, Devangbhai.;

  • 作者单位

    University of Toronto (Canada).;

  • 授予单位 University of Toronto (Canada).;
  • 学科 Engineering Biomedical.
  • 学位 M.A.Sc.
  • 年度 2011
  • 页码 62 p.
  • 总页数 62
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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