诺博内内同聚合限制了细胞在乙烯光点击水凝中的扩散
James L Gentry1, Steven R Caliari1,2
1Department of Biomedical Engineering, University of Virginia, Charlottesville, VA, 22903, USA.
Advanced healthcare materials
|August 16, 2025
概括
醇 - 诺波烯水凝表现出无意的同聚合,限制了细胞的扩散. 降低norbornene密度可以改善水凝的放松,并使人类介质细胞 (hMSC) 在3D组织工程中扩散.
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.
- 聚合物化学 聚合物化学
背景情况:
- 乙烯点击化学对于创建3D细胞扩散水凝至关重要.
- 醇 - 诺伯反应提供精确的交叉连接,但可能导致意外的诺伯同聚合,阻碍细胞行为.
研究的目的:
- 在客宿主交联的诺伯改性氨酸 (NorHA) 水凝中调查无意的诺伯同聚合.
- 确定norbornene密度对水凝特性和细胞形态学的影响.
主要方法:
- 制造具有不同norbornene密度 (f) 的NorHA水凝.
- 量化诺伯转换和水凝应力松的量化.
- 封装的人类介质细胞 (hMSCs) 的培养,以评估形态和扩散.
主要成果:
- 诺波伦的转化超过了石化测量乙烯的预期,这表明同聚合.
- 与较高密度 (NorHA,f=40,42.3%) 相比,较低norbornene密度 (NorHA,f=8) 的水凝显示出明显更高的应力放松 (93.0%).
- 诺哈 (f=8) 水凝促进了hMSC扩散成类似状的形状,而诺哈 (f=40) 则限制了细胞进入球形态.
结论:
- 在稀释系统中,醇 - 诺伯烯交叉连接并非完全稳定度,并且发生同聚合.
- 网络拓,由每个链 (f) 的norbornenes数量控制,对细胞扩散的水凝允许性产生关键影响.
- 优化聚合物架构对于开发用于组织工程应用的先进生物材料至关重要.
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