Biela Sarah A, Su Yi, Spatz Joachim P, Kemkemer Ralf
Max Planck Institute for Metals Research, Heisenbergstr. 3, Stuttgart, Germany.
Acta Biomater. 2009 Sep;5(7):2460-6. doi: 10.1016/j.actbio.2009.04.003. Epub 2009 Apr 9.
Cell adhesion, orientation and migration are influenced by surface topographies in the micrometer and nanometer range. In this work, we demonstrate the stimulation by topographical signals of human fibroblast cells (FCs), endothelial cells (ECs) and smooth muscle cells (SMCs). We systematically quantified the contact guidance alignment and directed migration of FCs, ECs and SMCs adhering to grooved substrates with lateral dimensions of 2-10microm and depths of 50-200nm. We found a common quantitative response characteristic of all three cell types: contact guidance significantly increased when the cells were cultured on substrates with smaller lateral dimensions or deeper grooves. Despite their general behavior, the three cell types exhibited a cell-type specific sensitivity to the groove patterns. The minimum groove depth to induce an orientation response and change cell shape was 50nm for FCs and about two times deeper for ECs and SMCs. The degree of alignment and directed migration of the FCs along the grooves was significantly stronger than for the ECs and SMCs. We demonstrate that ECs and SMCs can be stimulated by topographical signals but are less sensitive than FCs.
细胞黏附、定向和迁移受微米和纳米尺度表面形貌的影响。在这项工作中,我们展示了人类成纤维细胞(FCs)、内皮细胞(ECs)和平滑肌细胞(SMCs)受形貌信号的刺激。我们系统地量化了FCs、ECs和SMCs在横向尺寸为2 - 10微米、深度为50 - 200纳米的带槽底物上的接触导向排列和定向迁移。我们发现所有三种细胞类型都有一个共同的定量反应特征:当细胞在横向尺寸较小或沟槽较深的底物上培养时,接触导向显著增加。尽管它们有一般行为,但这三种细胞类型对沟槽模式表现出细胞类型特异性敏感性。诱导定向反应和改变细胞形状的最小沟槽深度,FCs为50纳米,ECs和SMCs约为其两倍深。FCs沿沟槽的排列程度和定向迁移明显强于ECs和SMCs。我们证明ECs和SMCs可受形貌信号刺激,但比FCs敏感性低。