粘性弹性水凝调节脂肪衍生的介酶干细胞,用于核肉质再生
1Department of Biomedical Engineering, McGill University, 3775 Rue University, Montréal, QC H3A 2B4, Canada; Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montréal, QC H3A 0C3, Canada.
Acta biomaterialia
|April 14, 2024
概括
这项研究表明,快速放松的水凝可以改善脂肪系干细胞 (ASC) 的存活率,并促进椎间盘 (IVD) 的再生. 在IVD修复中,矩阵粘弹性对于有效的干细胞治疗至关重要.
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.
- 干细胞生物学 干细胞生物学
背景情况:
- 腰部疼痛是一个全球性的健康问题,通常与椎间盘 (IVD) 退化有关.
- 目前用于核脉 (NP) 修复的再生策略涉及生物材料和干细胞.
- 原生NP组织的粘弹性特性至关重要,但它们对脂肪衍生干细胞 (ASC) 的影响还未得到充分研究.
研究的目的:
- 调查矩阵粘弹性如何影响IVD再生的ASC分化.
- 探索粘性弹性在调节生物材料内的ASC行为中的作用.
- 确定设计用于基于干细胞的IVD疗法的有效生物材料的关键参数.
主要方法:
- 开发了粘弹性酸水凝,具有可调节的应力放松时间 (100s1000s).
- 在这些水凝中培养人类ASC21天.
- 分析了细胞存活率,细胞外基质 (ECM) 分泌和基因表达.
主要成果:
- 快速放松的水凝显著提高了长期的ASC存活率和NP类型的ECM分泌 (,II型原).
- 在快速放松水凝中观察到的机械敏感TRPV4和NP特异性标记物 (SOX9,HIF-1α,KRT18,CDH2,CD24) 的升调.
- 在快速放松条件下改善细胞突起形成和矩阵重塑.
结论:
- 矩阵粘弹性是调节IVD再生的ASC行为的一个关键因素.
- 快速放松的,NP模拟的水凝促进ASC分化和ECM的产生.
- 粘性应成为用于IVD修复干细胞治疗中的生物材料的关键设计参数.
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