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首页> 外文期刊>Biomaterials >Smooth muscle cell adhesion to tissue engineering scaffolds.
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Smooth muscle cell adhesion to tissue engineering scaffolds.

机译:平滑肌细胞粘附到组织工程支架上。

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摘要

Synthetic polyesters of lactic and glycolic acid, and the extracellular matrix molecule collagen are among the most widely-utilized scaffolding materials in tissue engineering. However, the mechanism of cell adhesion to these tissue engineering scaffolds has not been extensively studied. In this paper, the mechanism of adhesion of smooth muscle cells to these materials was investigated. Vitronectin was found to be the predominant matrix protein adsorbed from serum-containing medium onto polyglycolic acid, poly(lactic co-glycolic) acid, and collagen two-dimensional films and three-dimensional scaffolds. Fibronectin adsorbed to both materials as well, although to a much lower density. Smooth muscle cell adhesion was mediated through specific integrin receptors interacting with these adsorbed proteins, as evidenced by both immunostaining and blocking studies. The receptors involved in adhesion included the alpha(v)beta5 to vitronectin, the alpha5beta1 to fibronectin and the alpha2beta1 to collagen I. Identification of the specific receptors used to adhere to these polymers clarifies why smooth muscle tissue development differs on these scaffolds, and may allow one to design tissue formation by controlling the surface chemistry of tissue engineering scaffolds.
机译:乳酸和乙醇酸的合成聚酯以及细胞外基质分子胶原蛋白是组织工程中使用最广泛的支架材料。但是,细胞粘附于这些组织工程支架的机制尚未得到广泛研究。在本文中,研究了平滑肌细胞粘附于这些材料的机理。玻连蛋白是从含血清的介质吸附到聚乙醇酸,聚乳酸-乙醇酸和胶原蛋白二维薄膜和三维支架上的主要基质蛋白。纤连蛋白也吸附到两种材料上,尽管密度要低得多。免疫染色和阻断研究均证实,平滑肌细胞粘附是通过特定的整合素受体与这些吸附的蛋白质相互作用而介导的。参与粘附的受体包括玻连蛋白的alpha(v)beta5,纤连蛋白的alpha5beta1和胶原I的alpha2beta1。对粘附于这些聚合物的特定受体的鉴定阐明了为何这些支架上的平滑肌组织发育不同,并且可能通过控制组织工程支架的表面化学来设计组织的形成。

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