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3D打印的骨再生支架通过血管化调节骨代谢平衡,用于骨质疏松性骨缺陷

Caiping Yan¹, Pengrui Zhang², Qiwei Qin²

¹Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Orthopedic Laboratory of Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing, 400016, PR China; Department of Orthopedics, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, 401120, PR China.

|July 9, 2024

概括

这项研究引入了一种新的改性支架 (PCL-SE),可促进骨质疏松缺陷中的血管化和骨再生. 通过增强血管形成和干细胞活性,PCL-SE恢复了骨代谢平衡.

科学领域:

生物材料科学生物材料科学
再生医学是一种再生医学.
整形外科手术整形外科手术

背景情况:

骨质疏松性骨缺陷存在治疗挑战,原因是血管功能受损和骨代谢受损.
恢复血管化是重新平衡局部骨代谢的关键,以有效地再生骨.

研究的目的:

开发和评估一个3D打印的多caprolactone脚手架 (PCL-SE) 修改了特定的治疗骨质疏松性骨缺陷.
研究PCL-SE促进血管和骨再生的机制.

主要方法:

用EPLQLKM和SVVYGLR (PCL-SE) 修改的3D打印的聚烯酸支架 (PCL) 的制造.
在体外评估的功能,吸引骨髓衍生介质干细胞 (BMSCs) 和促进内皮原生细胞 (EPC) 血管分化.
在体内研究使用骨质疏松症SD大鼠与大腿状骨缺陷,以评估PCL-SE的疗效.
涉及Notch信号通路激活和基因表达分析的机制研究.

主要成果:

PCL-SE成功促进了EPC血管化,并激活了BMSC中的Notch信号通路.
与骨质生成相关的基因被上调,而与骨质细胞相关的基因被下调,恢复了骨代谢平衡.
PCL-SE促进了"H"型血管的形成,并招募了BMSC,协同增强了骨质生成.
在患有骨质疏松症的老鼠的股骨膜缺陷中观察到微血管和骨组织的显著再生.

结论:

在骨质疏松性缺陷中,PCL-SE有效地支持in-situ血管化,并重塑骨代谢平衡.
开发的支架通过增强血管化和骨质生成,为骨质疏松性骨缺陷提供了一个有前途的治疗策略.

关键词:

通过3D打印打印3D打印.骨代谢调节骨代谢调节骨再生骨的再生骨质疏松性骨缺陷是一种骨质疏松性骨缺陷.多孔的PCL脚手架

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