Blood:Plg-RKT高表达明显影响促炎性血细胞的迁移能力

2019-06-24 MedSci MedSci原创

膜结合纤溶酶被免疫细胞用来降解细胞外基质,促进细胞迁移。免疫细胞,包括单核细胞和巨噬细胞,表达纤溶酶原受体Plg-RKT。根据细胞表面标志物和病理生理功能可区分单核细胞和巨噬细胞这两个不同的亚集Barbara Thaler等人对单核细胞和巨噬细胞亚群Plg-RKT的表达,以及潜在的差异表达是否可能对细胞迁移产生功能影响进行研究。与其他相关亚群相比,促炎CD14+CD16+人单核细胞和Ly6Chig

膜结合纤溶酶被免疫细胞用来降解细胞外基质,促进细胞迁移。免疫细胞,包括单核细胞和巨噬细胞,表达纤溶酶原受体Plg-RKT。根据细胞表面标志物和病理生理功能可区分单核细胞和巨噬细胞这两个不同的亚集

Barbara Thaler等人对单核细胞和巨噬细胞亚群Plg-RKT的表达,以及潜在的差异表达是否可能对细胞迁移产生功能影响进行研究。与其他相关亚群相比,促炎CD14+CD16+人单核细胞和Ly6Chigh小鼠单核细胞Plg-RKT的表达水平最高,,其结合的纤溶酶原也明显增多。

促炎性人巨噬细胞,由脂多糖和干扰素γ诱导极化后,Plg-RKT的表达水平明显高于由白介素-4和白介素-13极化选择性激活的巨噬细胞的表达水平。促炎单核细胞的定向迁移依赖于纤溶酶,并可被抗Plg-RTK单抗、ε-氨基己酸、抑肽酶和尿激酶型纤溶酶原激活物的氨基末端片段消除。

在腹膜炎体内模型中,Plg-RKT+/+小鼠相比,Plg-RKT-/-小鼠的Ly6Chigh单核细胞招募明显减少。此外,人颈动脉斑块和脂肪组织的免疫组化分析显示,在体内,促炎巨噬细胞也表现出高表达水平的Plg-RKT。

综上所述,本研究表明促炎单核细胞和巨噬细胞亚群中Plg-RKT的高表达对其迁移能力具有明显影响。


原始出处:

Barbara Thaler, et al. Differential expression of Plg-RKT and its effects on migration of proinflammatory monocyte and macrophage subsets. Blood 2019 :blood.2018850420; doi: https://doi.org/10.1182/blood.2018850420

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