Blood:中性粒细胞的PSGL-1和CXCR2信号协作促进深静脉血栓形成

2018-08-03 MedSci MedSci原创

中心点:在中性粒细胞中,PSGL-1和CXCR2信号协同作用可增强白细胞在血流受限的静脉中的黏附和NET释放。PSGL-1和CXCR2信号在中性粒细胞中协同作用会促进深静脉血栓形成,但在单核细胞中不会。摘要:炎症是深静脉血栓(DVT)形成的主要因素。限制小鼠下腔静脉(IVC)的血流可导致类似于人类的DVT。在这种模型上,中性粒细胞和单核细胞P-选择素依赖性黏附均可促进中性粒细胞胞外杀菌网(NETs

中心点:

在中性粒细胞中,PSGL-1和CXCR2信号协同作用可增强白细胞在血流受限的静脉中的黏附和NET释放。

PSGL-1和CXCR2信号在中性粒细胞中协同作用会促进深静脉血栓形成,但在单核细胞中不会。

摘要:

炎症是深静脉血栓(DVT)形成的主要因素。限制小鼠下腔静脉(IVC)的血流可导致类似于人类的DVT。在这种模型上,中性粒细胞和单核细胞P-选择素依赖性黏附均可促进中性粒细胞胞外杀菌网(NETs)的释放以及组织因子的表达。但是,目前尚不明确是什么信号导致髓系细胞产生促凝效应分子。

Tadayuki Yago等人利用超声检查和活体显微镜检查转基因小鼠发现P-选择素糖蛋白配体-1(PSGL-1)和趋化因子受体CXCR2参与滚动的中性粒细胞的传播信号,并协作诱导血流受限的IVCs中的β2整合素依赖性捕获。

与既往报道不同,中性粒细胞中的PSGL-1信号不依赖L-选择素,其与包含76kDa大小的白细胞磷蛋白(SLP-76)的适配器Src同源区域上的145位酪氨酸互作(非112位或128位)。PSGL-1和CXCR2信号协作可在一定程度上通过刺激NETs释放促进血栓形成、增加血栓大小。与在中性粒细胞不同,阻断单核细胞的PSGL-1或CXCR2信号并不影响其被招募进血栓块或组织因子的表达。

总而言之,本研究表明中性粒细胞的PSGL-1和CXCR2信号协同作用可促进深静脉血栓形成。

原始出处:

Tadayuki Yago, et al. Cooperative PSGL-1 and CXCR2 signaling in neutrophils promotes deep vein thrombosis in mice. Blood  2018  :blood-2018-05-850859;  doi: https://doi.org/10.1182/blood-2018-05-850859

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    2019-05-11 weiz
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    2018-10-14 fusion
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    2019-01-30 xue8602
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    2018-08-04 哈哈869

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