骨质的自下而上的基于挤出的生物制造
Laurens Parmentier1, Sophie D'Haese1, Nathan Carpentier1
1Polymer Chemistry and Biomaterials group (PBM), Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281, Building S4-Bis, Ghent, 9000, Belgium.
这项研究引入了用于骨再生的先进生物打印技术,使用修改过的凝油墨. 这些新材料显著增强了牙髓干细胞中的骨质分化和产量.
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:
- 骨再生面临着当前移植方法的挑战,包括高发病率和经济成本.
- 骨质组织工程为具有固有的局限性的现有临床解决方案提供了一个有希望的替代方案.
研究的目的:
- 调查不同交叉连接机制和基于凝的生物墨水中不同程度的替代对生物物理性质和骨质分化的影响.
- 开发可复制和生物相容的支架,使用基于沉积的生物打印和乙烯化学.
主要方法:
- 利用基于沉积的生物打印,使用凝甲基烯基 (GelMA) 和凝Norbornene (GelN) 变种.
- 研究的交叉连接机制涉及硫酸凝 (GelSH) 和三二乙烯 (TCEP).
- 在制造的结构中评估了牙髓干细胞的生物物理线索和骨质基因分化.
主要成果:
- 凝诺波伦尼-诺波伦尼 (DS 169) 与硫化凝 (GelNBNBSH) 交联显示出细胞的良好反应.
- 建筑物表现出适合的机械性能 (11-30 kPa压缩模) 和应力放松.
- 与标准GelMA相比,观察到产量增加了7倍,这表明骨质生成增强.
结论:
- 这项工作介绍了第一个可控,生物相容和细胞交互的化宏分子交叉连接器,用于基于挤出的生物制造.
- 低度 (5 w/v%) 改性凝生物墨水 (GelNBNBSH + TCEP) 促进了骨质分化,为骨再生提供了可行的策略.
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