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The Low-Density Lipoprotein Receptor-Related Protein (LRP) Mediates Clearance of Coagulation Factor Xa In Vivo
- Source :
- Blood. 91:555-560
- Publication Year :
- 1998
- Publisher :
- American Society of Hematology, 1998.
-
Abstract
- Blood coagulation factor X plays a pivotal role in the clotting cascade. When administered intravenously to mice, the majority of activated factor X (factor Xa) binds to α2-macroglobulin (α2M) and is rapidly cleared from the circulation into liver. We show here that the low-density lipoprotein receptor-related protein (LRP) is responsible for factor Xa catabolism in vivo. Mice overexpressing a 39-kD receptor-associated protein that binds to LRP and inhibits its ligand binding activity displayed dramatically prolonged plasma clearance of 125I-factor Xa. Preadministration of α2M-proteinase complexes (α2M*) also diminished the plasma clearance of125I-factor Xa in a dose-dependent fashion. The clearance of preformed complexes of 125I-factor Xa and α2M was similar to that of 125I-factor Xa alone and was also inhibited by mice overexpressing a 39-kD receptor-associated protein. These results thus suggest that, in vivo, factor Xa is metabolized via LRP after complex formation with α2M.
- Subjects :
- chemistry.chemical_classification
medicine.medical_specialty
Catabolism
Factor X
Immunology
Coagulation Factor Xa
Cell Biology
Hematology
Pharmacology
Biochemistry
Protease inhibitor (biology)
chemistry.chemical_compound
Endocrinology
Enzyme
chemistry
In vivo
Internal medicine
LDL receptor
medicine
Lipoprotein
medicine.drug
Subjects
Details
- ISSN :
- 15280020 and 00064971
- Volume :
- 91
- Database :
- OpenAIRE
- Journal :
- Blood
- Accession number :
- edsair.doi.dedup.....2b3dababd1cf2fd0112881015674725e