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Abstract Title:

Vitamin E reduces monocyte tissue factor expression in cirrhotic patients.

Abstract Source:

Blood. 1999 May 1;93(9):2945-50. PMID: 10216089

Abstract Author(s):

D Ferro, S Basili, D Praticó, L Iuliano, G A FitzGerald, F Violi

Abstract:

Clotting activation may occur in liver cirrhosis, but the pathophysiological mechanism has not been fully elucidated. Because a previous study demonstrated that lipid peroxidation is increased in cirrhosis, we analyzed whether there is a relationship between lipid peroxidation and clotting activation. Thirty cirrhotic patients (19 men and 11 women; age, 34 to 79 years) and 30 controls matched for sex and age were investigated. In all subjects, monocyte expression of tissue factor (TF) antigen and activity; plasma levels of prothrombin fragment 1+2 (F1+2), a marker of thrombin generation; and urinary excretion of Isoprostane-F2alpha-III, a marker of lipid peroxidation, were measured. Furthermore, the above-reported variables were re-evaluated after 30 days of treatment with standard therapy (n = 5) or standard therapy plus 300 mg vitamin E twice daily (n = 9). In addition, we analyzed in vitro if vitamin E (50 micromol/L) influenced monocyte TF expression and F1+2 generation. Cirrhotic patients had higher values of Isoprostane-F2alpha-III (P <. 0001), F1+2 (P <.0001), and monocyte TF antigen (P <.0001) and activity (P <.03) than controls. Isoprostane-F2alpha-III was significantly correlated with F1+2 (Rho = 0.85; P <.0001) and TF antigen (Rho = 0.95; P <.0001) and activity (Rho = 0.94; P <.0001). After vitamin E treatment, Isoprostane-F2alpha-III (P =.008), F1+2 (P <.008), and monocyte TF antigen (P =.012) and activity (P =.008) significantly decreased; no changes of these variables were detected in patients not receiving vitamin E. In vitro, vitamin E significantly reduced the expression of monocyte TF antigen (-52%; P =.001) and activity (-55%; P =.003), as well as F1+2 generation (-51%; P =.025). This study shows that vitamin E reduces both lipid peroxidation and clotting activation and suggests that lipid peroxidation may be an important mediator of clotting activation in liver cirrhosis.

Study Type : Human Study

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Sayer Ji
Founder of GreenMedInfo.com

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