Thromb Haemost 1983; 49(02): 138-141
DOI: 10.1055/s-0038-1657339
Original Article
Schattauer GmbH Stuttgart

Interaction of Heparin with Lipoproteins – Role of the Complex in the Inactivation of Thrombin and Plasmin

E Kecskés
The Second Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary
,
K G Büki
The Second Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary
,
P I Bauer
The Second Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary
,
R Machovich
The Second Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary
,
I Horváth
The Second Institute of Biochemistry, Semmelweis University Medical School, Budapest, Hungary
› Author Affiliations
Further Information

Publication History

Received 16 September 1982

Accepted 18 February 1983

Publication Date:
18 July 2018 (online)

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Summary

Heparin forms a complex with human low density lipoprotein (LDL) in the presence of Ca2+. The complex is dissociable by 0.5 M NaCI. Thrombin and plasmin causes the dissociation of the LDL-heparin complex, whereas factor Xa does not. Heparin, complexed with LDL, retains its enhancing effect on the rate of thrombin and plasmin inactivation by antithrombin III. LDL isolated from the plasma of persons with different pathological conditions did not alter the rate of thrombin inactivation by antithrombin III either in the absence or in the presence of heparin. Heparin seems to maintain its biological functions when it is in a complex with LDL.