中性粒细胞选择性地对物理线索做出反应:粗度调节其颗粒释放,以及NETosis
Gayathiri Elangovan1, Daniel J Fernandes1, Andrew Cameron1
1School of Medicine and Dentistry, Griffith University, Brisbane, QLD 4101, Australia.
Journal of functional biomaterials
|November 26, 2024
概括
合金 (Ti64) 和 (ZrO2) 的表面粗性显著增加了中性粒细胞弹性酶 (NE),矩阵金属蛋白酶-8 (MMP-8) 和中性粒细胞外陷 (NET) 的表达,特别是在更粗的表面.
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
- 材料工程 材料工程 材料工程
背景情况:
- 中性粒细胞在天生的免疫和炎症中发挥着关键作用.
- 生物材料的表面特性可以影响细胞反应.
- 合金 (Ti64) 和 (ZrO2) 是常用的牙科和骨科植入物材料.
研究的目的:
- 研究Ti64和ZrO2不同表面粗度对中性粒细胞激活的影响.
- 量化中性粒细胞弹性酶 (NE),矩阵金属蛋白酶-8 (MMP-8),MMP-9和中性粒细胞外陷 (NETs) 的表达,以应对不同的表面地形.
主要方法:
- 准备了具有定义表面粗度 (粗,光滑,非常光滑) 的Ti64和ZrO2盘.
- 在这些表面上培养了Wistar老鼠中性粒细胞.
- 使用ELISA测量NE,MMP-8和MMP-9水平;使用免疫组织化学评估NET形成.
主要成果:
- 与非常光滑的表面相比,粗的Ti64和ZrO2表面在2小时和4小时后显著增加了NE和MMP-8的表达.
- 随着培养时间的推移,MMP-9表达增加,但表面粗度没有显著影响.
- 经过4小时和8小时,更粗的表面 (R & S) 引发了明显更大的NET形成,而不是非常光滑的表面 (VS).
结论:
- Ti64和ZrO2生物材料的表面粗度增加可以增强中性粒细胞的激活.
- 表面地形是影响中性粒细胞释放炎症媒介 (NE,MMP-8) 和NETosis的关键因素.
- 这些发现对设计具有受控表面特性的生物材料有影响,以调节炎症反应.
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