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Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Ann+N+Y+Acad+Sci 2008 ; 1126 (ä): 265-7 Nephropedia Template TP
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Pathophysiological role of the glyoxalase system in renal hypoxic injury #MMPMID18448828
Kumagai T; Nangaku M; Inagi R
Ann N Y Acad Sci 2008[Apr]; 1126 (ä): 265-7 PMID18448828show ga
Methylglyoxal (MG), a reactive dicarbonyl compound mainly produced by metabolic pathways, such as glycolysis, binds to proteins or nucleic acids and forms advanced glycation end products. MG is efficiently metabolized by the glyoxalase system where MG is converted by glyoxalase I (GLO I) to S-D-lactoylglutathione. Although the glyoxalase system has been shown to play a pathological role in various diseases, including diabetic complications, its detailed pathophysiological function remains to be elucidated. We are interested in renal hypoxic diseases, but very little information is available regarding the association between the glyoxalase system and renal hypoxic diseases. Therefore, we investigated the biological role of GLO I in renal hypoxic diseases by using the rat ischemia/reperfusion (I/R) injury model. I/R induced the reduction of renal GLO I activity associated with morphological changes and renal dysfunction. Interestingly, the rats that overexpress human GLO I (GLO I Tg rats) showed amelioration of these manifestations in renal I/R (e.g., improvement of the tubulointerstitial injury and renal function). Accumulation of renal MG adducts, carboxyethyllysine, induced by I/R also decreased in GLO I Tg rats compared to wild-type rats. These results demonstrate that GLO I has renoprotective effects in I/R injury via reduction of protein modification by MG.