在发育模型中,矿化原/乳酸复合支架用于承载性骨再生
Wenbo Zhu1,2,3, Wenjing Li1,2,3, Mengxuan Yao1,2,3
1Department of Orthopaedic Surgery, Hebei Medical University Third Hospital, No. 139 Ziqiang Road, Shijiazhuang 050051, China.
Polymers
|October 28, 2023
概括
矿化原/多乳酸支架有效地修复儿童的骨缺陷. 这些仿生支架促进细胞生长和骨再生,在六个月内自然降解.
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.
- 整形外科手术 整形外科手术
背景情况:
- 在儿童中修复负载骨缺陷存在重大临床挑战.
- 矿物化原蛋白 (MC) 模仿天然骨的组成和结构,提供生物相容性和骨导电性.
- 聚乳酸 (PLA) 由于其机械性能和生物降解性,是骨再生的合适材料.
研究的目的:
- 开发和评估矿物化原蛋白/多乳酸 (MC/PLA) 复合支架用于儿科骨缺陷修复.
- 评估MC/PLA支架的仿生特性,生物相容性和骨再生能力.
- 为了比较MC/PLA支架与现有的材料,如酸/PLA (HA/PLA).
主要方法:
- 使用现场矿化和冷干燥技术制造了MC/PLA复合式支架.
- 细胞毒性,细胞增殖和迁移使用Phalloidin/DAPI染色和CCK-8/scratch试验进行了评估.
- 脚手架的特征包括动物模型中的多孔性,X射线衍射 (XRD),X射线成像,微型CT和组织学分析 (H&E染色).
主要成果:
- 与MC和HA/PLA支架相比,MC/PLA支架没有表现出细胞毒性,并且显著增强了细胞增殖和迁移.
- 脚手架展示了相互连接的多孔结构 (≥70%的多孔性) 和特征性的酸XRD图案.
- 在体内研究显示,缺陷边界消失,大量的新骨生长在脚手架上,并在六个月内脚手架退化.
结论:
- 复合MC/PLA支架的微观结构和构成类似于无关节骨.
- 这些支架具有出色的生物相容性,并促进显著的骨再生.
- MC/PLA复合脚手架代表了一种有前途的生物材料,用于修复儿科患者承载性骨缺陷.
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