Shedding of active tissue factor by aortic smooth muscle cells (SMCs) undergoing apoptosis

Shedding of active tissue factor by aortic smooth muscle cells (SMCs) undergoing apoptosis
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经历凋亡的主动脉平滑肌细胞 (SMC) 脱落活性组织因子

DOI:
10.1160/th02-12-0291
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发表时间:
2003
影响因子:
6.7
通讯作者:
P. Sié
P. Sié
中科院分区:
医学2区
文献类型:
--
作者:
A. Brisset;A. Terrisse;D. Dupouy;Lise Tellier;Stéphane Pech;C. Navarro;P. Sié

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由于新生内膜SMC的凋亡是晚期动脉粥样硬化斑块的一个特征,因此我们研究了合成表型的SMC的促凝血特性。从球囊损伤后10天的大鼠主动脉中分离的SMC,先前发现可以上调组织因子(TF)和组织因子抑制物(TFPI),并释放大量TFPI(Ghrib等人。Thromb Haemost 2002;87:1043-50),对Fas配体诱导的细胞凋亡敏感。在这个过程中,细胞表面的转铁蛋白活性在6小时内增加了10倍,同时凝血酶原酶的比例增加,而膜上的转铁蛋白表达显著减少。SMC死亡时产生的微粒子(MPS)携带完整的Tf和功能Tf,但TFPI的释放没有改变,因此在SMC死亡过程中平衡转移到促凝状态。在胶原蛋白涂层玻片上,脱落的MPS促进了流动全血中血栓的形成。动脉粥样硬化斑块中凋亡的SMC代表高度血栓形成物质的储存库,在自发或机械性斑块破裂的情况下释放到血流中。
Summary As apoptosis of neo-intimal SMCs is a feature of advanced atherosclerotic plaques, the procoagulant properties of SMCs of synthetic phenotype undergoing apoptosis were investigated. SMCs isolated from rat aorta obtained 10 days after balloon injury, previously found to up-regulate Tissue Factor (TF) and Tissue Factor Inhibitor (TFPI) and to release large amounts of TFPI (Ghrib et al. Thromb Haemost 2002;87:1043-50), were sensitive to the apoptosis induced by Fas-ligand. During this process, surface TF activity rose by a factor 10 over 6 hours, in parallel with a proportional increase in prothrombinase, while TF protein expressed at the membrane significantly decreased. The microparticles (MPs) produced during SMC death bore intact and functional TF, but the release of TFPI did not change, so that the balance shifted to a procoagulant state during apoptosis. Shed MPs enhanced thrombus formation in flowing whole blood over collagen coated-glass slides. Apoptotic SMCs in atherosclerotic plaques represent a reservoir of highly thrombogenic material, released into the blood stream in case of spontaneous or mechanical plaque disruption.
DOI: 10.1172/jci119765
发表时间: 1997-11
期刊: The Journal of clinical investigation
影响因子: --
作者:
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DOI: --
发表时间: 1996
期刊: Laboratory investigation; a journal of technical methods and pathology.
影响因子: --
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发表时间: 2000
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DOI: 10.1161/01.res.87.2.126
发表时间: 2000-07
影响因子: 20.1
作者:
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DOI: 10.1161/01.atv.17.10.2200
发表时间: 1997-10-01
影响因子: 8.7
作者:
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通讯作者: Libby, P