相关实验视频
Updated: Jun 25, 2026

15:52
Postproduction Processing of Electrospun Fibres for Tissue Engineering
Published on: August 9, 2012
18.2K
生物活性混合Poly (乳酸) /Poly (甲基甲酸) (PLA/PMMA) 电纤维的开发 用生物玻璃纳米颗粒功能化用于骨组织工程应用
Fabián Álvarez-Carrasco1, Pablo Varela1, Mauricio A Sarabia-Vallejos2
1Laboratorio de Biomecánica y Biomateriales, Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Santiago de Chile, Santiago 9160000, Chile.
International journal of molecular sciences
|July 13, 2024
概括
由聚乳酸 (PLA) 和聚甲基甲酸 (PMMA) 与生物玻璃纳米颗粒制成的新混合脚手架对骨组织工程有很大的希望. 这些材料具有良好的生物相容性,增强的愈合和受控的降解,使它们适合再生医学应用.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物科学 聚合物科学
- 组织工程是组织工程.
背景情况:
- 开发有效的骨组织工程支架对于再生医学至关重要.
- 混合聚合物支架提供可调节的特性,以改善临床结果.
- 纳入生物活性纳米粒子可以增强脚手架的集成和功能.
研究的目的:
- 开发和描述基于聚乳酸 (PLA) 和聚甲基甲酸 (PMMA) 的新型混合架构,这些架构与生物玻璃纳米粒子 (n-BG) 功能化.
- 评估这些混合支架的物理化学性质,生物活性,降解行为和体外/体内生物相容性,用于骨组织工程应用.
主要方法:
- 使用/二甲基形式胺 (CF/DMF) 溶剂系统制造PLA/PMMA/n-BG混合脚手架的电技术.
- 脚手架形态,纤维直径,孔隙互连性和机械性能 (模量) 的表征.
- 通过沉浸在模拟体液 (SBF),在酸盐缓冲盐水 (PBS) 中的水解降解和体外细胞培养研究 (HBOF-1.19细胞系) 来评估生物活性.
- 在BALB雄性小鼠中使用皮下模型进行体内生物相容性评估.
主要成果:
- 成功地制造了多孔性PLA/PMMA/n-BG混合架构,其孔隙相互连接.
- 观察到纤维直径减少和缺陷增加,PMMA含量较高,与纳米粒子聚合有关.
- 脚手架表现出降低的扬模量,表明灵活性增加.
- 经过SBF浸泡后在表面形成酸晶体的证明生物活性.
- 与纯PLA相比,显示了减少的水解降解.
- 实验室研究证实了良好的细胞活力和增殖.
- 在体内研究表明没有细胞毒性作用,并增强了伤口愈合.
结论:
- 通过电制造的PLA/PMMA/n-BG混合脚手架适用于骨组织工程.
- 加入n-BG可以增强生物活性,调节降解速度.
- 这些支架促进细胞生长,在体内表现出极好的生物相容性,支持组织再生.
相关概念视频
Classification and Mechanical Properties of Synthetic Polymers
Synthetic polymers are classified as elastomers, fibers, or plastics based on their crystallinity. Crystallinity, the degree of long-range order in the solid state, influences the mechanical properties (stretching or contracting) of elastomers. Elastomers are flexible polymers that can expand or contract easily upon the application of an external force. They have numerous crosslinks that pull them back into their original shape when stress is removed. Silicones, for instance, are highly elastic...
Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

