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Thromb Haemost 1985; 53(01): 126-129
DOI: 10.1055/s-0038-1661251
Original Article
Schattauer GmbH Stuttgart

Release of Plasminogen Activator from Isolated Perfused Dog Heart

Fujio Matsubara
The Department of Pathology, Faculty of Medicine, Kyushu University, Maidashi, Fukuoka, Japan
,
Katsuo Sueishi
The Department of Pathology, Faculty of Medicine, Kyushu University, Maidashi, Fukuoka, Japan
,
Yutaka Ishii
The Department of Pathology, Faculty of Medicine, Kyushu University, Maidashi, Fukuoka, Japan
,
Kenzo Tanaka
The Department of Pathology, Faculty of Medicine, Kyushu University, Maidashi, Fukuoka, Japan
› Author Affiliations
Further Information

Publication History

Received 18 May 1984

Accepted 04 December 1984

Publication Date:
18 July 2018 (online)

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Summary

The release and the local activity of plasminogen activator (PA) were studied in isolated perfused dog hearts, without or with intimal injury induced by means of a balloon catheter inserted into the left anterior descending coronary artery (LAD). Thrombin but not DFP-thrombin induced a dose-dependent PA release in doses of 8 to 32 units. ADP 20 or 200 μmol but not ergonovine 20 or 200 μg induced a weak PA release. The local PA activity was much lower in the LAD at 1 or 4 weeks after this injury than in the intact LAD. However, the release of PA from the hearts after intimal injury was similar to findings in the intact hearts.

We conclude from this study that thrombin plays an important role in regulating the coagulation-fibrinolysis system in endothelial cells and that changes in the properties of the endothelial cells may lead to initiation and enhancement of atherosclerosis.

Key words

Plasminogen activators - Coronary perfusion - Thrombin - Intimal injury - Arteriosclerosis
 

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