骨质母细胞衍生出的外体作为粒子诱导的周围假肢骨解中的潜在的新型通讯器
Wanderson de Souza1,2, S Gemini-Piperni3,4, Carolina Ruivo5
1Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil.
Materials today. Bio
|September 2, 2024
概括
二氧化纳米颗粒改变骨细胞释放的外体,促进与部植入物失败有关的炎症. 这些外体体中的泌尿酸酶等离子体激活剂 (uPA) 可能作为骨解生物标志物.
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
- 整形外科手术 整形外科手术
背景情况:
- 由对假肢磨损颗粒的炎症反应驱动的周围假肢骨解,是关节修复手术的主要原因.
- 外基因组 (Exos) 越来越多地因其在细胞间通信和疾病发病过程中的作用而得到认可.
- 磨损颗粒对骨质母细胞衍生的外体的特定影响及其对骨质解剖中的骨免疫信号的贡献仍然在很大程度上未被探索.
研究的目的:
- 调查二氧化纳米颗粒 (TiO2 NPs) 的作用,模仿假肢磨损,对外体生物发生和功能.
- 评估这些修饰外体在骨质免疫通信和周围假肢骨解中的作用.
- 为了识别潜在的骨质溶解外体生物标志物.
主要方法:
- 利用两种暴露于TiO2NP的骨质细胞模型来研究外体细胞的生物发生.
- 分析了外体细胞的形态,大小和分子载荷.
- 进行了功能性测试,以骨源外体刺激原发性人体巨细胞,以评估它们的免疫调节作用.
- 从患者尿液样本中检测到尿素酶等离子体激活剂 (uPA) 在外体中.
主要成果:
- TiO2 NPs被内化到多细胞体中,改变了骨质母细胞衍生的外体的分泌和载荷,而不影响它们的尺寸或形态.
- 用uPA丰富的外体诱导了混合的M1/M2巨细胞表型,释放了围围假肢骨解的特征的促炎和抗炎因素.
- uPA被检测到从骨质溶解患者的尿液中分离出来的外体.
结论:
- 通过纳米颗粒暴露而改变的骨质细胞衍生外体可以促进与周围假肢骨解相关的炎症环境.
- 外体内的uPA成为潜在的非侵入性生物标志物,用于识别患有骨质溶解风险的患者.
- 这项研究揭示了在骨科植入物磨损的背景下,外生体介导的骨免疫通信.
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