Document Detail

Comparison of the toxicity of the radiocontrast agents, iopamidol and diatrizoate, to rabbit renal proximal tubule cells in vitro.
MedLine Citation:
PMID:  3252027     Owner:  NLM     Status:  MEDLINE    
Radiographic contrast agent-induced acute renal failure is an increasingly recognized clinical event. Multiple factors have been implicated in its development. Recent experiments have demonstrated that sodium diatrizoate, a common ionic radiocontrast agent, is moderately toxic to proximal tubule cells in vitro, and that this toxicity is enhanced by hypoxia. In this study, we compare toxicities of the nonionic radiocontrast agent, iopamidol, and the commonly used ionic contrast agent, diatrizoate. Suspensions enriched in proximal tubule segments were exposed for 82.5 min to 10 or 25 mM diatrizoate or 10 or 25 mM iopamidol with or without 22.5 min or 30 min of hypoxia. Cell viability parameters, including basal and uncoupled respiratory rates, tubule cell potassium and calcium levels and cell ATP content were measured. No consistent differences in tubule viability parameters were observed between tubule suspensions exposed to 10 mM concentrations of the radiocontrast agents during either oxygenated or hypoxic conditions. Under oxygenated conditions, both 25 mM iopamidol and diatrizoate exposure produced greater metabolic alterations in renal tubules than control conditions, but the effects were not statistically significant. With concomitant hypoxia, the alterations after 25 mM diatrizoate exposure were significantly greater than those seen after exposure to 25 mM iopamidol. Iopamidol had less of a detrimental effect on renal tubule potassium content and both basal and uncoupled respiratory rates than that of diatrizoate under these conditions. Thus, diatrizoate is more toxic to rabbit renal proximal tubule cells than iopamidol in vitro, and this difference in toxicity is enhanced by hypoxia.(ABSTRACT TRUNCATED AT 250 WORDS)
J M Messana; D A Cieslinski; V D Nguyen; H D Humes
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of pharmacology and experimental therapeutics     Volume:  244     ISSN:  0022-3565     ISO Abbreviation:  J. Pharmacol. Exp. Ther.     Publication Date:  1988 Mar 
Date Detail:
Created Date:  1989-08-10     Completed Date:  1989-08-10     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0376362     Medline TA:  J Pharmacol Exp Ther     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1139-44     Citation Subset:  IM; S    
Department of Internal Medicine, Veterans Administration Medical Center, Ann Arbor, Michigan.
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MeSH Terms
Adenosine Triphosphate / analysis
Analysis of Variance
Anoxia / metabolism
Calcium / analysis
Diatrizoate / toxicity*
Iopamidol / toxicity*
Kidney Tubules, Proximal / analysis,  drug effects*
Oxygen Consumption
Potassium / analysis
Grant Support
Reg. No./Substance:
117-96-4/Diatrizoate; 56-65-5/Adenosine Triphosphate; 62883-00-5/Iopamidol; 7440-09-7/Potassium; 7440-70-2/Calcium

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