装有限制力的工程皮肤通过增强血管化和上皮化来促进全厚伤口愈合
Guangliang Zhang1, Zhiqiang Zhang2, Gaobiao Cao1
1Department of Orthopaedics, Suzhou Ruihua Orthopaedic Hospital, Suzhou Medical College, Soochow University, 5 Tayun Road, Suzhou, Jiangsu 215104, China.
Acta biomaterialia
|September 1, 2023
概括
这项研究开发了一种用于组织工程皮肤的GelMA-HAMA-纤维素支架,该支架支持3D生物打印产生的受限力. 脚手架增强了血管化,并促进了 in vivo 的伤口愈合.
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:
- 组织工程皮肤对于伤口修复至关重要,但不充分的血管化仍然是一个重大挑战.
- 之前的研究表明,3D生物打印中的受限力通过YAP信号通路影响血管分支.
- 优化脚手架的机械性能对于将工程皮肤接到伤口边缘至关重要.
研究的目的:
- 研究GelMA-HAMA-纤维素支架的潜力,以支持3D生物打印诱导的局限力.
- 评估脚手架促进血管化和增强伤口愈合的能力.
- 为了优化临床接应用的机械性能.
主要方法:
- 制造不同度的GelMA-HAMA-纤维素支架 (特别是3%的GelMA).
- 在细胞产生的受限力下评估脚手架形状的变化.
- 在体外 (in vitro) 评估可打印性,机械性能和生物相容性.
- 在体内移植细胞播种支架到裸体小鼠皮肤缺陷.
- 分析新血管化,血管连接,表面图案,生长因子沉积和原形成.
主要成果:
- 3%的GelMA-HAMA-纤维素支架表现出受嵌入细胞力量影响的形状变化.
- 脚手架表现出易于打印,在培养14天后用于接的最佳机械性能,以及良好的生物相容性.
- 在体内研究表明,细胞播种的支架促进了新血管和伤口修复.
- 在愈合的伤口中观察到增强的血管连接,有图案的表面和增加的原沉积.
结论:
- 凝MA-HAMA-纤维素支架可以在3D生物打印过程中有效支持受限力,从而改善血管化和伤口愈合.
- 这些发现突显了机械刺激的水凝复合材料作为先进的组织工程支架的潜力.
- 开发的支架为临床伤口愈合应用提供了一个有前途的新疗法策略.
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