Nephropathy

From Wikipedia, the free encyclopedia

Nephropathy refers to damage to or disease of the kidney. An older term for this is nephrosis.

One cause of nephropathy is the long term usage of analgesics. The pain medicines which can cause kidney problems include aspirin, acetaminophen, and nonsteroidal anti-inflammatory drugs, or NSAIDs. This form of nephropathy is "chronic analgesic nephritis," a chronic inflammatory change characterized by loss and atrophy of tubules and interstitial fibrosis and inflammation (BRS Pathology, 2nd edition).

Specifically, long term use of the analgesic phenacetin has been linked to renal papillary necrosis (necrotizing papillitis).

A second possible cause of nephropathy is due to decreased function of xanthine oxidase in the purine degredation pathway. Xanthine oxidase will degrade hypoxanthine to xanthine and then to uric acid. Because xanthine is not very soluble in water an increase in xanthine will form crystals (which can lead to kidney stones) and result in damage of the kidney. Drugs like allopurinol that are used to inhibit xanthine oxidase can therefore cause possible nephropathy.


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