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Factor VIII expression in liver disease.

Martine J Hollestelle¹, Hendrika G M Geertzen, Irene H Straatsburg

¹Department of Plasma Proteins, Sanquin Research at CLB, Amsterdam, The Netherlands.

Thrombosis and Haemostasis

|February 13, 2004

Summary

Elevated factor VIII (FVIII) in liver cirrhosis stems from increased von Willebrand factor (VWF) synthesis and reduced low-density lipoprotein receptor-related protein (LRP) expression, not higher FVIII production.

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Area of Science:

Hepatology
Hematology
Molecular Biology

Background:

Liver disease often presents with elevated factor VIII (FVIII) and reduced synthesis of other proteins.
The precise mechanism behind increased FVIII in liver disease remains unclear.

Purpose of the Study:

To investigate the mechanism of elevated plasma factor VIII (FVIII) in liver cirrhosis.
To examine the expression of FVIII, von Willebrand factor (VWF), and low-density lipoprotein receptor-related protein (LRP) in liver disease patients.

Main Methods:

Analysis of FVIII, VWF, and LRP mRNA and protein levels in liver tissue samples from patients with cirrhosis, liver failure, and controls.
Immunohistochemical analysis of VWF protein distribution and LRP-producing cells.

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Main Results:

Cirrhotic livers showed significantly lower hepatic FVIII and LRP mRNA but higher VWF mRNA compared to controls.
Increased VWF protein distribution and reduced LRP-producing cells were observed in cirrhotic tissue.
Plasma levels of FVIII and VWF were significantly elevated in patients with cirrhosis.

Conclusions:

Elevated plasma FVIII in liver cirrhosis is linked to increased hepatic VWF biosynthesis and decreased LRP expression.
The findings suggest that increased FVIII levels are not due to enhanced FVIII synthesis in the liver.