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Engineered endothelial cell adhesion via VCAM1 and E-selectin antibody-presenting alginate hydrogels

机译:通过VCAM1和E-选择素抗体呈递藻酸盐水凝胶对内皮细胞进行工程粘附

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摘要

Materials that adhere to the endothelial cell (EC) lining of blood vessels may be useful for treating vascular injury. Cell adhesion molecules (CAMs), such as endothelial leukocyte adhesion molecule-1 (E-selectin) and vascular cell adhesion molecule-1 (VCAM1), modulate EC-leukocyte interactions. In this study, we mimicked cell-cell interactions by seeding cells on alginate hydrogels modified with antibodies against E-selectin and VCAM1, which are upregulated during inflammation. ECs were activated with interleukin-1α to increase CAM expression and subsequently seeded onto hydrogels. The strength of cell adhesion onto gels was assessed via a centrifugation assay. Strong, cooperative EC adhesion was observed on hydrogels presenting a 1:1 ratio of anti-VCAM1:anti-E-selectin. Cell adhesion was stronger on dual functionalized gels than on gels modified with anti-VCAM1, anti-E-selectin or the arginine-glycine-aspartic acid (RGD) peptide alone. Anti-VCAM1:anti-E-selectin- modified hydrogels may be engineered to adhere the endothelium cooperatively.
机译:粘附到血管内皮细胞(EC)衬里的材料可用于治疗血管损伤。细胞粘附分子(CAM),例如内皮细胞白细胞粘附分子1(E-选择素)和血管细胞粘附分子1(VCAM1),可调节EC-白细胞相互作用。在这项研究中,我们通过将细胞接种在藻酸盐水凝胶上模拟细胞之间的相互作用,藻酸盐水凝胶用抗E-选择素和VCAM1的抗体修饰,这些抗体在炎症过程中被上调。 EC用白介素-1α激活以增加CAM表达,然后接种到水凝胶上。通过离心测定法评估细胞粘附在凝胶上的强度。在呈现1:1的抗VCAM1:抗E-选择素比例的水凝胶上,观察到了牢固,协同的EC粘附。在双重功能化的凝胶上,细胞粘附力强于仅用抗VCAM1,抗E-选择素或精氨酸-甘氨酸-天冬氨酸(RGD)肽修饰的凝胶。抗VCAM1:抗E-选择素修饰的水凝胶可经工程改造以协同粘附内皮。

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