Delayed DMSO administration protects the kidney from mercuric chloride-induced injury

• Published in: Journal of the American Society of Nephrology 2004-10, Vol.15 (10), p.2648-2654
• Main Authors: JO, Sang-Kyung, XUZHEN HU, YUEN, Peter S. T, ASLAMKHAN, Amy G, PRITCHARD, John B, DEAR, James W, STAR, Robert A
• Format: Article
• Language: English
• Subjects: Acute Kidney Injury - chemically induced; Acute Kidney Injury - pathology; Acute Kidney Injury - prevention & control; Animals; Biological and medical sciences; Biopsy, Needle; Dimethyl Sulfoxide - pharmacology; Disease Models, Animal; Drug Administration Schedule; Immunohistochemistry; Injections, Intraperitoneal; Kidney Function Tests; Male; Medical sciences; Mercuric Chloride; Mice; Mice, Inbred BALB C; Nephrology. Urinary tract diseases; Oxidative Stress - drug effects; Probability; Random Allocation; Reference Values; Sensitivity and Specificity; Time Factors
• ISSN: 1046-6673; 1533-3450
• DOI: 10.1097/01.asn.0000139933.20109.cb

Reactive oxygen species are implicated as mediators of tissue damage in ischemic and toxic acute renal failure. Whereas many agents can inhibit renal ischemic injury, only hepatocyte growth factor, melatonin, N-acetylcysteine, and DMSO inhibit injury after mercuric chloride administration. Although it has been suggested that DMSO may chelate the mercuric ion, more recent studies suggest that it has anti-inflammatory and antioxidant effects. Acute renal failure was induced by 5 mg/kg subcutaneous injection of mercuric chloride in BALB/c mice. DMSO (3.8 ml/kg, 40% in PBS) or vehicle (PBS) was injected intraperitoneally at 0 and 24 h after mercuric chloride injection, or DMSO treatment was delayed 3 or 5 h. DMSO prevented increases in serum creatinine and tubular damage at 24 and 48 h. When DMSO treatment was delayed by 3 h, it was still beneficial; however, with a 5-h delay, the histology score and serum creatinine were not significantly decreased. DMSO partially prevented a mercuric chloride-induced decrease in glutathione peroxidase activity and completely prevented the transient decrease in superoxide dismutase activity. Neither mercuric chloride nor DMSO affected catalase activity significantly. For investigating possible effects of DMSO on cellular mercuric ion uptake, MDCK cells that were transfected with human organic anion transporter-1 were used. 203Hg uptake was inhibited 90% by N-acetylcysteine but only 5% by DMSO, indicating that the effect of DMSO is not related to chelating mercuric ion or inhibiting its uptake. It is concluded that DMSO acts in part as an antioxidant to inhibit mercuric chloride-induced acute renal injury.