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Mechanisms of fibrinogen-induced microvascular dysfunction during cardiovascular disease Lominadze D; Dean WL; Tyagi SC; Roberts AMActa Physiol (Oxf) 2010[Jan]; 198 (1): 1-13Fibrinogen (Fg) is a high molecular weight plasma adhesion protein and a biomarker of inflammation. Many cardiovascular and cerebrovascular disorders are accompanied by increased blood content of Fg. Increased levels of Fg result in changes in blood rheological properties such as increases in plasma viscosity, erythrocyte aggregation, platelet thrombogenesis, alterations in vascular reactivity and compromises in endothelial layer integrity. These alterations exacerbate the complications in peripheral blood circulation during cardiovascular diseases such as hypertension, diabetes and stroke. In addition to affecting blood viscosity by altering plasma viscosity and erythrocyte aggregation, growing experimental evidence suggests that Fg alters vascular reactivity and impairs endothelial cell layer integrity by binding to its endothelial cell membrane receptors and activating signalling mechanisms. The purpose of this review is to discuss experimental data, which demonstrate the effects of Fg causing vascular dysfunction and to offer possible mechanisms for these effects, which could exacerbate microcirculatory complications during cardiovascular diseases accompanied by increased Fg content.|Animals[MESH]|Blood Viscosity/physiology[MESH]|Cardiovascular Diseases/*metabolism/*physiopathology[MESH]|Erythrocyte Aggregation/physiology[MESH]|Fibrinogen/*metabolism[MESH]|Humans[MESH]|Microcirculation/*physiology[MESH] |
