Clearance of coagulation factor VIII in very low-density lipoprotein receptor knockout mice

Br J Haematol. 2004 Sep;126(5):722-5. doi: 10.1111/j.1365-2141.2004.05093.x.

Abstract

Low-density lipoprotein receptor-related protein (LRP) contributes to factor VIII (FVIII) catabolism in vivo. Besides LRP, FVIII also interacts with very low-density lipoprotein receptor (VLDLR) in vitro. We investigated the physiological role of VLDLR in FVIII catabolism, using knockout mouse models for VLDLR and LRP, alone and in combination. VLDLR(-/-) mice displayed normal plasma FVIII, whereas VLDLR(-/-) LRP(-) double-knockout mice had slightly increased FVIII compared with LRP-deficient mice. Remarkably, VLDLR deficiency slightly accelerated FVIII clearance. Adenovirus-mediated overexpression of VLDLR did not lower plasma FVIII in LRP-deficient mice. We conclude that VLDLR does not act in concert with LRP in FVIII clearance in vivo.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Factor VIII / metabolism*
  • Integrases / genetics
  • LDL-Receptor Related Proteins / blood
  • Mice
  • Mice, Knockout
  • Mice, Transgenic
  • Receptors, LDL / blood
  • Receptors, LDL / genetics*

Substances

  • LDL-Receptor Related Proteins
  • Receptors, LDL
  • VLDL receptor
  • Factor VIII
  • Cre recombinase
  • Integrases