Role of endothelium-derived nitric oxide-endothelin balance in contrast medium-induced acute renal vasoconstriction in dogs.

Abstract:

RATIONALE AND OBJECTIVES:The authors evaluated the involvement of nitric oxide and endothelin in radiographic contrast medium-induced changes in renal hemodynamics. METHODS:Eleven anesthetized healthy dogs were each studied during three periods. Thirty minutes before the first, second, and third periods, the dogs received 1 mL per kilogram of body weight of isotonic saline, L-N-nitro-L-arginine-methyl-ester (L-Name, 10 mg/kg intravenously), and L-arginine (500 mg/ kg intravenously), respectively. Renal blood flow (RBF) and mean arterial blood pressure were continuously monitored. The glomerular filtration rate (GFR) was evaluated by means of polyfructosan clearance. RESULTS:Contrast medium induced a significant (P < .05) decrease in RBF and GFR and a significant (P < .05) increase in urinary endothelin excretion. L-Name enhanced the effect of contrast media on RBF and GFR. L-arginine attenuated the effect of L-Name on the contrast medium-induced reduction of GFR. CONCLUSION:These findings support the hypothesis that acute contrast medium-induced intrarenal vasoconstriction may involve an imbalance of endothelial vasoactive agents, nitric oxide, and endothelin, and they confirm the involvement of hemodynamic changes in contrast medium-induced nephropathy.

journal_name

Acad Radiol

journal_title

Academic radiology

authors

Bagnis C,Idee JM,Dubois M,Jacquiaud C,Maistre G,Jacobs C,Deray G

doi

10.1016/s1076-6332(97)80115-8

subject

Has Abstract

pub_date

1997-05-01 00:00:00

pages

343-8

issue

5

eissn

1076-6332

issn

1878-4046

journal_volume

4

pub_type

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