To investigate the properties of phenylboronic acid-functional poly(amido amine) polymers (BA-PAA) in forming multilayered thin films with poly(vinyl alcohol) (PVA) and chondroitin sulfate (ChS), and to evaluate their compatibility with COS-7 cells. Copolymers of phenylboronic acid-functional poly(amido amine)s, differing in the content of primary amine (DAB-BA-PAA) or alcohol (ABOL-BA-PAA) side groups, were synthesized and applied in the formation of multilayers with PVA and ChS. Biocompatibility of the resulting films was evaluated through cell culture experiments with COS-7 cells grown on the films. PVA-based multilayers were thin, reaching ~100 nm at 10 bilayers, whereas ChS-based multilayers were thick, reaching ~600 nm at the same number of bilayers. All of the multilayers are stable under physiological conditions in vitro and are responsive to reducing agents, owing to the presence of disulfide bonds in the polymers. PVA-based films were demonstrated to be responsive to glucose at physiological pH at the investigated glucose concentrations (10–100 mM). The multilayered films displayed biocompatibility in cell culture experiments, promoting attachment and proliferation of COS-7 cells. Responsive thin films based on boronic acid functional poly(amido amine)s are promising biocompatible materials for biomedical applications, such as drug releasing surfaces on stents or implants.
研究
苯硼酸官能团聚(
氨基胺)
聚合物(
BA-P
AA)与聚
乙烯醇(PVA)和
硫酸软骨素(ChS)形成多层薄膜的特性,并评估它们与 C
OS-7 细胞的相容性。研究人员合成了
苯基
硼酸官能团聚(
氨基胺)共聚物,这些共聚物的
伯胺(
DAB-
BA-P
AA)或醇(ABOL-
BA-P
AA)侧基含量各不相同,并将其用于与 PVA 和 ChS 形成多层膜。通过对生长在薄膜上的 C
OS-7 细胞进行
细胞培养实验,评估了所得薄膜的
生物相容性。基于 PVA 的多层膜很薄,10 层时达到约 100 nm 厚,而基于 ChS 的多层膜很厚,相同层数时达到约 600 nm 厚。由于
聚合物中存在二
硫键,所有多层膜在体外生理条件下都很稳定,并对还原剂有反应。研究表明,在生理 pH 值和
葡萄糖浓度(10-100 mM)下,基于 PVA 的薄膜对
葡萄糖有反应。多层薄膜在
细胞培养实验中显示出
生物相容性,促进了 C
OS-7 细胞的附着和增殖。基于
硼酸功能聚(
氨基胺)的响应性薄膜是很有前景的
生物医学应用
生物相容性材料,例如支架或植入物上的药物释放表面。