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在细菌性心内膜炎体外模型中对单核细胞组织因子表达的刺激。

Stimulation of monocyte tissue factor expression in an in vitro model of bacterial endocarditis.

作者信息

Bancsi M J, Thompson J, Bertina R M

机构信息

Department of Infectious Diseases, Leiden State University Hospital, The Netherlands.

出版信息

Infect Immun. 1994 Dec;62(12):5669-72. doi: 10.1128/iai.62.12.5669-5672.1994.

Abstract

The coagulation system plays a major role in the formation of the infected endocardial vegetation in bacterial endocarditis. Since monocytes can express tissue factor (TF) on their surfaces, they are thought to be responsible for the extrinsic activation of the coagulation cascade during this disease. The present study used an in vitro model in which fibrin plates, isolated adherent monocytes, and Streptococcus sanguis were used as an analog for endocardial vegetations. Adherence to fibrin by itself was found to stimulate TF expression on the monocytes, but stimulation by S. sanguis significantly increased TF expression, which was found to be maximal at a bacterium-to-monocyte ratio of 9 or more.

摘要

凝血系统在细菌性心内膜炎感染性心内膜赘生物的形成中起主要作用。由于单核细胞可在其表面表达组织因子(TF),因此它们被认为是该疾病期间凝血级联反应外源性激活的原因。本研究使用了一种体外模型,其中纤维蛋白平板、分离的黏附单核细胞和血链球菌被用作心内膜赘生物的类似物。发现单核细胞自身对纤维蛋白的黏附会刺激TF表达,但血链球菌的刺激会显著增加TF表达,且在细菌与单核细胞的比例为9或更高时发现TF表达达到最大值。

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