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Adenosine-induced renal vasoconstriction in man

P Marraccini¹, S Fedele, M Marzilli

¹C.N.R. Institute of Clinical Physiology, Pisa, Italy. paolomar@po.ifc.pi.cnr.it

Cardiovascular Research

|November 1, 1996

Summary

Adenosine significantly reduced renal blood flow velocity in humans, suggesting its role in regulating kidney function during physiological stress.

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Area of Science:

Cardiovascular Physiology
Renal Physiology

Background:

Adenosine is a nucleoside with known vasodilatory effects.
Its role in regulating renal blood flow in humans requires further elucidation.

Purpose of the Study:

To investigate the impact of exogenous adenosine on human renal blood flow.

Main Methods:

Eleven healthy individuals underwent selective renal artery infusion of increasing adenosine doses.
Renal blood flow velocity was measured using intravascular Doppler, alongside continuous monitoring of blood pressure and ECG.

Main Results:

Adenosine administration caused a dose-dependent, transient reduction in renal blood flow velocity.
No significant changes were observed in blood pressure, heart rate, or renal artery diameter.

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Conclusions:

Exogenous adenosine markedly reduces renal blood flow in humans.
Endogenous adenosine may play a crucial role in modulating renal perfusion during conditions of altered cardiac output.