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Kidney: primary source of plasminogen after acute depletion in the cat
Science (New York, N.Y.)
|October 8, 1971
Insights
The kidney is the main organ that replenishes plasminogen (a protein crucial for blood clotting) after it is depleted. The liver does not contribute significantly to this restoration process.
Area of Science:
- Physiology
- Biochemistry
Background:
- Plasminogen is essential for fibrinolysis, the process of breaking down blood clots.
- Understanding plasminogen regulation is vital for managing bleeding disorders and thrombotic conditions.
Purpose of the Study:
- To identify the primary organ responsible for restoring normal plasma plasminogen levels following acute depletion.
- To investigate the role of the kidney and liver in plasminogen homeostasis.
Main Methods:
- Acute plasminogen depletion was induced in feline subjects via streptokinase injection.
- Plasma plasminogen concentrations were measured in arterial, renal venous, and hepatic venous blood samples over time.
Main Results:
- The kidney was identified as the principal source of plasminogen for restoring plasma levels post-depletion.
- Hepatic vein plasminogen concentration remained lower than arterial concentration during the recovery phase, indicating limited hepatic contribution.
- Renal vein and arterial plasminogen concentrations normalized concurrently, supporting the kidney's role.
Conclusions:
- The kidney plays a critical role in maintaining plasminogen homeostasis and restoring plasma levels after depletion.
- The liver's contribution to plasminogen replenishment in this acute depletion model is minimal.
- These findings highlight the kidney as a key organ in regulating plasminogen availability.
Abstract:
The kidney was the primary source of plasminogen to restore normal plasma levels, after acute plasminogen depletion was produced by injection of streptokinase in cats. The concentration of plasminogen in the hepatic vein remained below that in the artery during the time when concentrations in the artery and renal vein were returning to normal.