可注射,抗崩,粘合剂,塑料和生物活性骨移植替代品通过缓解骨质疏松性骨缺陷中的氧化应激来促进骨再生
Lei Huang1, Shihao Zhang2, Mengxuan Bian1
1Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
Acta biomaterialia
|April 15, 2024
概括
一种新的可注射骨移植替代品PDT-TCP-SE通过减少氧化应激和促进骨再生,有效治疗骨质疏松性骨缺陷. 这种生物材料利用纳米颗粒来增强骨质生成并保护细胞免受铁亡.
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.
- 纳米技术纳米技术
背景情况:
- 骨质疏松性骨缺陷由于氧化应激和高反应性氧物种 (ROS),阻碍骨形成,造成临床挑战.
- 纳米粒子 (SeNPs) 在骨质生成中表现有前途,因为它们具有抗氧化特性,可以对抗骨质损失并帮助骨质疏松症的再生.
- 对于骨质疏松性骨缺陷的现有治疗方法往往不足以解决复杂的生物环境.
研究的目的:
- 开发一种可注射,粘合和适应形状的骨移植替代品,用于治疗骨质疏松性骨缺陷.
- 在体外和体内研究新生物材料的骨质,血管,抗炎和抗氧化作用.
- 阐明生物材料保护骨细胞中的铁亡的机制.
主要方法:
- 使用一合成方法创建PDT-TCP-SE骨移植替代品,其中包括聚 (乳酸碳酸盐) (PDT),β-三酸 (β-TCP) 和SeNPs.
- 在体外研究中评估了该材料的粘附性,骨质诱导性,血管生成潜力,抗炎作用和抗氧化能力,包括其对骨髓衍生干细胞 (BMSCs) 中埃拉斯诱导的铁亡的作用.
- 在体内实验中评估了生物材料在骨质疏松性骨缺陷模型中促进骨再生的有效性,评估其对ROS水平,炎症和新骨形成的影响.
主要成果:
- 合成的PDT-TCP-SE具有出色的粘附性,可注射性和形状适应性,适用于骨缺陷修复.
- 在体外和体内研究证实了该材料的骨质诱导活性,血管效应,抗炎性质,以及在骨质疏松性骨缺陷微环境中显著降低ROS水平.
- 通过Sirt1/Nrf2/GPX4抗氧化途径,PDT-TCP-SE证明了通过Sirt1/Nrf2/GPX4抗氧化途径在BMSC中对埃拉斯诱导的铁亡的保护作用,减轻了氧化应激.
结论:
- 开发的PDT-TCP-SE骨移植替代品是治疗骨质疏松性骨缺陷的有希望的生物材料,提供简单的合成和有益的特性.
- 该材料有效缓解氧化应激,抑制铁亡,促进新的骨在现场再生.
- 由于其生物相容性,可注射性和调节氧化应激水平的能力,PDT-TCP-SE在骨组织工程中具有显著的临床应用潜力.
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