超声触发凝用于恢复退化的功能性脊柱单元的生物力学特性
Veerle A Brans1, Anna P Constantinou2,3, Matthew J Kibble4
1Institute of Biomedical Engineering, University of Oxford, Oxford, OX3 7LD, UK.
Advanced healthcare materials
|December 11, 2025
概括
超声波触发水凝形成用于椎间盘退化 (IVD) 治疗. 这种新型生物材料很好地集成,部分恢复了牛IVD的功能,为缓解背部疼痛提供了希望.
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 整形外科 整形外科
背景情况:
- 腰部疼痛是全球主要的残疾,通常与椎间盘 (IVD) 退化有关.
- 目前对IVD退化的治疗方法存在局限性,可注射生物材料在组织集成和受控凝方面面临挑战.
- 制定有效的现场战略来修复IVD至关重要.
研究的目的:
- 评估一种新的概念,使用超声波远程触发在位植入物形成,用于治疗IVD退化.
- 开发和优化可注射生物材料前体,在超声波刺激时形成水凝.
- 评估超声波触发的水凝在退化的ex vivoIVDs中的疗效和整合.
主要方法:
- 开发了含有离子交叉链接剂 (化) 装载的热敏感脂质体的离子多糖化物溶液 (酸盐).
- 超声波参数 (0.95MHz,1.6MPa振幅,87%的工作周期) 被优化为可控的脂质体释放和水凝形成.
- 概念验证实验是在退化的ex vivo牛体IVD中进行的.
主要成果:
- 优化的生物材料配方包括1.5%重量/v的藻酸盐,10-15毫米的化加载脂质体和6%重量/v的玻璃微球.
- 超声波应用成功触发了通过脂质体释放交叉连接剂的水凝形成.
- 植入牛体IVD显示生物机械功能的部分恢复,良好的组织整合,没有物质.
结论:
- 超声波触发的 in situ 水凝形成为椎间盘退化治疗提供了一个有前途的策略.
- 开发的生物材料在临床前模型中证明了有效的整合和部分功能恢复.
- 生物材料和协议的进一步改进是必要的,以提高磁盘内疗效和临床转化.
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