微计算机断层扫描用于3D生物打印支架的微结构评估
Salma P Ramirez1,2, Ivana Hernandez1,2, Hannia V Balcorta2,3
1Inspired Materials & Stem-Cell Based Tissue Engineering Laboratory (IMSTEL), The University of Texas at El Paso, El Paso, Texas 79968, United States.
ACS applied bio materials
|October 23, 2023
概括
黄金纳米颗粒 (Au-NPs) 增强了微计算机断层扫描 (micro-CT) 对三维生物打印 (3DBP) 支架的成像. 这些Au-NP增强的水凝显示了改进的微观结构可视化和机械性能,证明了组织工程的安全性.
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.
- 纳米技术纳米技术
背景情况:
- 三维生物打印 (3DBP) 能够为组织工程创建复杂的支架.
- 描述这些支架的微观结构对于理解它们的功能至关重要.
- 纳米颗粒的结合可能会提高材料性能和成像能力.
研究的目的:
- 评估微计算机断层扫描 (微CT) 用于表征3DBP支架.
- 研究金纳米粒子 (Au-NPs) 对水凝支架的微观结构和成像的影响.
- 评估3DBP水凝中的Au-NPs的生物相容性和机械影响.
主要方法:
- 使用UV-vis,DLS,泽塔潜力和TEM制备和描述Au-NPs.
- 在3DBP水凝中加入Au-NP.
- 在AC16心肌细胞上对Au-NP的细胞毒性评估.
- 使用SEM和微CT进行微结构分析.
- 使用和不使用Au-NP和电池的脚手架的机械性能评估.
主要成果:
- Au-NPs被成功合成,涂上 methoxy-PEG,并进行特征 (66 nm球形核心).
- 在2D和3D培养中,Au-NP对心肌细胞无毒.
- 用Au-NPs对支架的微CT成像显示了增强的分辨率和微观结构可视化.
- Au-NPs改善了无细胞支架的机械性能 (弹性模块,粘度).
- 细胞的存在导致了脚手架的生物降解和降低机械强度.
结论:
- 微CT对于表征3DBP架构微结构是有效的.
- Au-NPs提高了微型CT成像质量和水凝支架的机械性能.
- Au-NPs是生物相容的,适合用于组织工程应用.
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