首页> 美国卫生研究院文献>Biochemical Journal >Fibrinogen up-regulates the expression of monocyte chemoattractant protein 1 in human saphenous vein endothelial cells.
【2h】

Fibrinogen up-regulates the expression of monocyte chemoattractant protein 1 in human saphenous vein endothelial cells.

机译:纤维蛋白原上调人隐静脉内皮细胞中单核细胞趋化蛋白1的表达。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

High concentrations of fibrinogen in plasma have been associated with an increased risk of saphenous vein graft pathology. We have investigated the ability of fibrinogen to up-regulate the expression of monocyte chemoattractant protein 1 (MCP-1) in cultured human saphenous vein endothelial cells (HSVEC) isolated from saphenous vein. Increasing concentrations of fibrinogen (0-4 microM) stimulated a 20-fold increase in MCP-1 secretion within 4 h. Incubation of HSVEC with 2 microM fibrinogen for 4 h also caused a 2-fold increase in the MCP-1-to-glyceraldehyde-3-phosphate dehydrogenase mRNA ratio. The fibrinogen-mediated MCP-1 secretion fell to basal levels after preincubation of HSVEC with the complex of fibrinogen fragments D and E but remained unchanged after preincubation of HSVEC with either fibrinogen fragment E, s-ICAM-1 or the pentapeptide GRGDV. In contrast, fibrinogen fragment D acted as a potent inhibitor of fibrinogen-mediated MCP-1 secretion. Labelled fibrinogen fragment D bound to HSVEC with a K(d) of 6.5 microM. These findings indicate that fibrinogen, at physiological concentrations, uses an epitope on the fibrinogen D domain to bind to a receptor on HSVEC to up-regulate MCP-1 expression and secretion. This receptor seems to be distinct from intercellular adhesion molecule 1 and the integrins previously recognized as fibrinogen receptors.
机译:血浆中高浓度的纤维蛋白原与隐静脉移植物病理的风险增加有关。我们已经研究了纤维蛋白原上调从隐静脉分离的人隐静脉内皮细胞(HSVEC)中单核细胞趋化蛋白1(MCP-1)表达的能力。纤维蛋白原浓度的增加(0-4 microM)在4小时内刺激了MCP-1分泌增加了20倍。 HSVEC与2 microM纤维蛋白原一起孵育4 h也导致MCP-1与甘油醛-3-磷酸脱氢酶mRNA比率增加了2倍。在将HSVEC与纤维蛋白原片段D和E的复合物预温育后,纤维蛋白原介导的MCP-1分泌降至基础水平,但在将HSVEC与纤维蛋白原片段E,s-ICAM-1或五肽GRGDV预温育后保持不变。相反,纤维蛋白原片段D充当了纤维蛋白原介导的MCP-1分泌的有效抑制剂。标记的纤维蛋白原片段D以6.5 microM的K(d)与HSVEC结合。这些发现表明,在生理浓度下,纤维蛋白原利用纤维蛋白原D结构域上的表位与HSVEC上的受体结合以上调MCP-1的表达和分泌。该受体似乎不同于细胞间粘附分子1和先前被认为是纤维蛋白原受体的整联蛋白。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号