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THE VASODILATOR AND VASOCONSTRICTOR PROPERTIES OF BLOOD SERUM AND PLASMA
1Department of Pathology, College of Physicians and Surgeons, Columbia University, New York.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Researchers discovered a kidney-specific vasodilator in plasma, identified as albumin. Blood clotting releases a separate constrictor substance affecting renal and limb vessels.
Area of Science:
- Physiology
- Biochemistry
- Renal Physiology
Background:
- Vascular regulation in the kidneys is crucial for maintaining homeostasis.
- Understanding vasoactive substances in plasma and blood is essential for cardiovascular research.
Purpose of the Study:
- To identify and characterize vasoactive substances present in blood plasma and serum.
- To investigate the direct effects of these substances on vascular smooth muscle.
Main Methods:
- Isolation and precipitation of substances from plasma and serum.
- Testing the effects of purified substances on arterial muscle coats.
- Observing the impact of blood clotting on vasoactivity.
Main Results:
- A kidney-specific vasodilator, identified as an albumin-class proteid, was found in plasma and serum, precipitated by boiling and alcohol.
- This vasodilator acts directly on arterial muscle.
- Blood clotting releases a non-proteid constrictor substance, resistant to boiling but soluble in alcohol, affecting renal and limb vessels directly.
Conclusions:
- Plasma contains a specific albuminous vasodilator for renal vessels.
- Blood clotting generates a distinct constrictor agent impacting both renal and limb vasculature.
- Both vasodilator and constrictor substances exert direct effects on vascular smooth muscle.
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