ABSTRACT
Objective To investigate the effect of different types and dosages of contrast media on the function and cell injury of rat renal artery endothelium. Methods Renal artery rings were isolated from SD rats and incubated in IMDM medium with 30,60,90 ?l/ml Diatrizoate or Ioversol. The contents of NO and ET-1 were detected by Griess method and radioimmunoassay. The release of LDH was assessed by colotimetric method. Results After being incubated with Diatrizoate or Ioversol for 1 h,the renal artery endothelium did not show significant changes in the release of NO,but the release of ET-1 increased in a dose-dependent manner. When the renal artery endothelium was stimulated with Diatrizoate at dosage of 90 ?l/ml for 4 h,the release of LDH was increased markedly. A slight,but insignificant,increased release of LDH induced by Ioversol was observed. Conclusion Both Diatrizoate and Ioversol can affect the function of renal artery endothelium by interfering the secretion of ET-1,and the effects of Diatrizoate are more obvious than Ioversol. High-dose Diatrizoate can also induce renal artery endothelial cells injury.