纤连蛋白

Abstract(#br)Cell-sheet-engineering based regenerative medicine is successfully applied to clinical studies, though cell sheets contain uniformly distributed cells. For the further application to complex tissues/organs, cell sheets with a multi-cellular pattern were highly demanded. Micro-contact printing is a quite useful technique for patterning proteins contained in extracellular matrix (ECM). Because ECM is a kind of cellular adherent molecules, ECM-patterned cell culture surface is capable of aligning cells on the pattern of ECM.

Mammalian cells regulate adhesion by expressing and regulating a diverse array of cell adhesion molecules on their cell surfaces. Since different cell types express distinct sets of cell adhesion molecules, substrate-specific adhesion is cell type- and condition-dependent. Single-cell force spectroscopy is used to quantify the contribution of cell adhesion molecules to adhesion of cells to specific substrates at both the cell and single molecule level. However, the low throughput of single-cell adhesion experiments greatly limits the number of substrates that can be examined.

促进血管生成对于组织修复治疗的成功和组织工程结构的命运至关重要。尽管许多生化信号分子已经被使用，但已知其在体内的生物学功能有限，主要是由于其寿命短，活性差。除了生化信号之外，基质(或工程生物材料)在刺激血管生成过程中起着关键作用。在这里，我们讨论了修复和再生各种组织，包括皮肤、骨、肌肉和神经所采取的促血管生成的努力，重点讨论了工程基质的作用。这包括孔结构和理化性质的设计(纳米拓扑、刚度、化学和可降解性)、基质的剪裁以恰当地呈现生长因子及其与黏附配体的串扰、血管生成分子和金属离子的控制和持续传递、细胞工程和预血管化组织的构建等。总体而言，材料驱动的策略是调整细胞和组织微环境，通过基质线索和适当呈现或传递信号分子和细胞，血管生成事件可以得到明显的青睐。