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酸和酸加载的多 (L-乳酸) 孔隙微球重编程巨细胞以改善骨修复

Yiyang Huang¹, Yichang Xu¹, Ziyan Huang¹

¹Department of Orthopedics, The First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, PR China. fengyu@suda.edu.cn.

Journal of materials chemistry. B

|June 28, 2024

概括

这项研究引入了可注射的微球,可以释放黑色素和酸,以增强骨愈合. 这些微球促进M2巨细胞的两极分化,并加速动物模型中的骨缺陷修复.

科学领域:

生物材料科学生物材料科学
免疫学免疫学免疫学
再生医学是一种再生医学.

背景情况:

骨免疫微环境对骨缺陷的愈合产生了重大影响.
有限的研究存在于调节巨细胞以改善骨修复.

研究的目的:

开发一种可注射生物材料,促进M2巨细胞的两极分化,以改善骨缺陷的修复.
为了研究酸和酸加载的微球在骨质生成中的有效性.

主要方法:

设计的可注射,可降解的聚-乳酸 (PLLA) 微球.
通过生物仿真矿物化将内置的氨酸 (MT) 和酸 (CaP) 水晶结合起来.
评估大细胞两极分化和骨的形成,在一个动物模型的股骨膜缺陷.

主要成果:

在LPS刺激后,微球显著增加了M2极化巨细胞 (39.2±2.7%).
在缺陷区域实现显著更高的骨矿物质密度 (129.4 ± 12.8 mg/cc在2周,171.6 ± 13.6 mg/cc在4周).
证明加速骨缺陷修复和增强骨质生成.

结论:

装有MT的PLLA微球与CaP晶体有效地改善了骨免疫微环境.
这种策略促进骨质生成,并显著加快骨缺陷的修复.
提出了治疗骨缺陷的有希望的方法.

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Bone Remodeling

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