Figure 155

Nephrotoxicants may act at different sites in the kidney, resulting in altered renal function. The sites of injury by selected nephrotoxi-cants are shown. Nonsteroidal anti-inflammatory drugs (NSAIDs), angiotensin-converting enzyme (ACE) inhibitors, cyclosporin A, and radiographic contrast media cause vasoconstriction. Gold, interferon-alpha, and penicillamine can alter glomerular function and result in proteinuria and decreased renal function. Many nephrotoxicants damage tubular epithelial cells directly. Aminoglycosides, cephaloridine, cadmium chloride, and potassium dichromate affect the S1 and S2 segments of the proximal tubule, whereas cisplatin, mercuric chloride, and dichlorovinyl-L-cysteine affect the S3 segment of the proximal tubule. Cephalosporins, cadmium chloride, and NSAIDs cause interstitial nephritis whereas phenacetin causes renal papillary necrosis.

Renal vasoconstriction [

=£> Prerenal azotemia

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