Biomimetic Strategy to Enhance Epithelial Cell Viability and Spreading on PEEK Implants

偷看 纳米地形 生物材料 蛋白质吸附 生物医学工程 材料科学 表面改性 组织工程 纤维连接蛋白 生物相容性 化学 纳米技术 细胞 复合材料 医学 生物化学 聚合物 冶金 物理化学
作者
Ahmed Saad,Carolina Penaloza Arias,Min Wang,Osama A. Elkashty,Davide Brambilla,Faleh Tamimi,Marta Cerruti
出处
期刊:ACS Biomaterials Science & Engineering [American Chemical Society]
卷期号:8 (12): 5129-5144 被引量:6
标识
DOI:10.1021/acsbiomaterials.2c00764
摘要

Polyetheretherketone (PEEK) is a biocompatible material widely used in spinal and craniofacial implants, with potential use in percutaneous implants. However, its inertness prevents it from forming a tight seal with the surrounding soft tissue, which can lead to infections and implant failure. Conversely, the surface chemistry of percutaneous organs (i.e., teeth) helps establish a strong interaction with the epithelial cells of the contacting soft tissues, and hence a tight seal, preventing infection. The seal is created by adsorption of basement membrane (BM) proteins, secreted by epithelial cells, onto the percutaneous organ surfaces. Here, we aim to create a tight seal between PEEK and epithelial tissues by mimicking the surface chemistry of teeth. Our hypothesis is that collagen I, the most abundant tooth protein, enables integration between the epithelial tissue and teeth by promoting adsorption of BM proteins. To test this, we immobilized collagen I via EDC/NHS coupling on a carboxylated PEEK surface modified using diazonium chemistry. We used titanium alloy (Ti-6Al-4V) for comparison, as titanium is the most widely used percutaneous biomaterial. Both collagen-modified PEEK and titanium showed a larger adsorption of key BM proteins (laminin, nidogen, and fibronectin) compared to controls. Keratinocyte epithelial cell viability on collagen-modified PEEK was twice that of control PEEK and ∼1.5 times that of control titanium after 3 days of cell seeding. Both keratinocytes and fibroblasts spread more on collagen-modified PEEK and titanium compared to controls. This work introduces a versatile and biomimetic surface modification technique that may enhance PEEK-epithelial tissue sealing with the potential of extending PEEK applications to percutaneous implants, making it competitive with titanium.
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