Thromb Haemost 2001; 86(03): 840-847
DOI: 10.1055/s-0037-1616141
Review Articles
Schattauer GmbH

Assembly of High Molecular Weight Kininogen and Activation of Prekallikrein on Cell Matrix

G. Motta
1   Departamento de Bioquímica, Univesidade Federal de São Paulo (UNIFESP-EPM), São Paulo, Brasil, and Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
,
Z. Shariat-Madar
1   Departamento de Bioquímica, Univesidade Federal de São Paulo (UNIFESP-EPM), São Paulo, Brasil, and Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
,
F. Mahdi
1   Departamento de Bioquímica, Univesidade Federal de São Paulo (UNIFESP-EPM), São Paulo, Brasil, and Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
,
C. A. M. Sampaio
1   Departamento de Bioquímica, Univesidade Federal de São Paulo (UNIFESP-EPM), São Paulo, Brasil, and Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
,
A. H. Schmaier
1   Departamento de Bioquímica, Univesidade Federal de São Paulo (UNIFESP-EPM), São Paulo, Brasil, and Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
› Author Affiliations

This work was supported by a grant #96/05074-5 from Fundação de Amparo à Pesquisa do Estado de São Paulo to Dr. Motta and NIH grant HL52779 to Dr. Schmaier.
Further Information

Publication History

Received 07 July 2000

Accepted after resubmission 13 April 2001

Publication Date:
14 December 2017 (online)

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Summary

Investigations determined if extracellular matrix of endothelial cells (EC) is a platform for HK assembly and PK activation. In buffers containing bovine serum albumin, biotin-HK binding to ECV304 cells or their matrix requires ≥ 50 µM added Zn 2+. Ortho-phenanthroline or a HK domain 5 peptide blocks HK binding. Binding to umbilical vein EC or matrix, but not ECV304 cells or matrix, is mediated by cytokeratin 1. Biotin-HK binds to ECV304 cells or matrix with a Kd of 15.8 or 9.0 nM and a Bmax of 2.6 107 or 2.4 107 sites/cell, respectively. PK activation on ECV304 cells or matrix is blocked by antipain or SBTI and corn trypsin inhibitor partially inhibits kallikrein formation. PK activation occurs on ECV304 cells or matrix prepared without serum or in human factor XII deficient serum, indicating that the PK activator is not factor XIIa. EC matrix promotes plasminogen activation after the assembly of HK, PK and pro-urokinase. These studies indicate that matrix of various EC has the ability to assemble HK allowing for PK activation and subsequent activities.

Abbreviations: EC: endothelial cells, FXII: factor XII, HK: high molecular weight kininogen, HKa: bradykinin-free HK, PK: plasma prekallikrein, Pro-UK: pro-urokinase, uPAR: urokinase plasminogen activator receptor, tcuPA: twochain urokinase, CK1: cytokeratin 1, SBTI: soybean trypsin inhibitor, HUVEC: human umbilical vein endothelial cell, SDS-PAGE: sodium dodecyl sulfatepolyacrylamide gel electrophoresis, CTI: corn trypsin inhibitor, p-APMSF: p-amidinophenylmethylsulfonylfluoride, EBSS: Earle’s Balanced Salt Solution