一个酸盐玻璃增强的复合性烯胺梯度支架用于骨质突界面再生
Zaid M Younus1,2, Ifty Ahmed3, Paul Roach4
1School of Pharmacy and Bioengineering, Keele University, Keele, UK.
Biomaterials and biosystems
|September 2, 2024
概括
这项研究通过将聚-异烯酸胺 (pNIPAM) 和聚-三-烯酸胺 (pNTBAM) 与酸玻璃纤维 (PGF) 结合,开发了一种新的支架. 支架支持独特的细胞行为,显示了骨质粒细胞再生的前景.
科学领域:
- 生物材料科学 生物材料科学
- 组织工程是组织工程.
- 再生医学是一种再生医学.
背景情况:
- 骨质突缺陷难以修复,往往导致关节性关节疾病.
- 目前针对骨质状元损伤的临床治疗方法产生了不同的结果.
- 组织工程提供了创造专门支架的潜力,以再生骨软骨接口.
研究的目的:
- 为了研究聚-异烯酸胺 (pNIPAM) 和聚-三-烯酸胺 (pNTBAM) 在单个支架中的集成.
- 为了创建一个多区域的脚手架,具有独特的建筑特性,用于骨髓重生.
- 将纵向酸盐玻璃纤维 (PGF) 纳入,以提高生物活性和矿化.
主要方法:
- 通过原子转移基聚合 (ATRP) 和溶液造合成的PNIPAM和PNTBAM.
- 将纵向酸盐玻璃纤维 (PGF) 纳入聚合物基质中.
- 使用扫描电子显微镜 (SEM) 和富里叶变换红外光谱 (FTIR) 进行了标志性的支架架构.
- 使用微计算断层扫描 (μCT) 评估了脚手架退化.
- 评估细胞反应 (骨质母细胞和软质细胞) 使用矿化,糖氨基甘油 (GAG) 和蛋白质表达 (原体,附件A2) 的测试.
主要成果:
- FTIR证实了一个完好无损的支架与逐渐的聚合物转换; SEM揭示了三个不同的建筑区域与不同的孔径大小.
- 脚手架支持所有地区的骨质生成和矿化潜力.
- 主要在pNTBAM区域观察到同基活性.
- 结合PGF增强了矿化和改变了细胞外基质沉积 (增加了原I,X,附件A2;减少了原II).
结论:
- 综合的PNIPAM/PNTBAM支架成功地创造了独特的建筑区域.
- 在支架上观察到不同的细胞反应 (chondrogenic, osteogenic,矿化).
- 酸盐玻璃纤维显著影响了矿化和矩阵生产.
- 这些发现表明了PGF结合的,烯胺衍生物支架在骨质合体界面再生方面的潜力.
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