Adhesion Mediated by Bonds in Series

Adhesion Mediated by Bonds in Series
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由串联键介导的粘附力

DOI:
--
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发表时间:
1996
期刊:
Biotechnology progress (Print)
影响因子:
--
通讯作者:
D. Lauffenburger
D. Lauffenburger
中科院分区:
--
文献类型:
--
作者:
A. Saterbak;D. Lauffenburger

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在生理情况和生物技术应用中的细胞粘附通常通过一系列蛋白质/蛋白质连接来介导。通过受体/配体键串联细胞/基板接触的粘附强度探索与一个简单的数学模型和量化的实验粘附测定。开发了一个确定性的质量作用模型来描述细胞/基底接触通过单个和串联键的附着和分离。实验系统由蛋白包被微珠、可溶性抗体接头和抗体包被玻璃表面组成。使用径向流分离试验,测量通过单个和串联连接的微珠/基质接触的粘附强度。总之,这项工作表明,由两个受体/配体键串联组成的细胞/基质接触的比粘附强度小于由任一键单独组成的细胞/基质接触的比粘附强度。此外,断裂由串联键组成的接触的力随溶液连接剂的浓度而变化。该模型预测,连锁断裂位置的轨迹只有轻微的依赖于相对键亲和力的比例。
Cell adhesion in physiological situations and biotechnological applications is often mediated through serial protein/protein linkages. The adhesion strength of cell/substrate contacts through receptor/ligand bonds in series is explored with a simple mathematical model and quantified with an experimental adhesion assay. A deterministic, mass‐action model is developed to describe the attachment and detachment of cell/substrate contacts through single and serial bonds. The experimental system is comprised of protein‐coated beads, soluble antibody linkers, and an antibody‐coated glass surface. Using the Radial‐Flow Detachment Assay, the adhesion strengths of bead/substrate contacts through single and serial linkages are measured. Taken together, this work shows that the specific adhesion strength of the cell/substrate contacts comprised of two receptor/ligand bonds in series is less than the specific adhesion strength of the cell/substrate contacts comprised of either of the bonds separately. In addition, the force to rupture contacts comprised of bonds in series varies with the concentration of the solution linker. The model predicts that the locus of linkage fracture location has only a mild dependence on the ratio of relative bond affinities.
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DOI: --
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