PMID: 16636306Apr 26, 2006Paper

Effect of nitric oxide synthase inhibition on proteinuria in glomerular immune injury

Experimental Biology and Medicine
Prasun K DattaElias A Lianos

Abstract

In glomerular immune injury, the inducible isoform of nitric oxide synthase (iNOS) becomes a major catalyst of NO production. Although iNOS-catalyzed NO production is sustained and can be cytotoxic, iNOS inhibition exacerbates the magnitude of proteinuria that accompanies immune injury. To investigate putative mechanisms of this effect, we assessed changes in glomerular permeability to albumin by using the following two approaches: (i) an in vivo rat model of glomerular immune injury induced by antibody against the glomerular basement membrane (GBM), in which urine albumin excretion was measured under conditions of iNOS inhibition, and (ii) an ex vivo model of isolated rat glomeruli, in which changes in glomerular capillary permeability to albumin were assessed under conditions of NOS inhibition. In rats with anti-GBM antibody-induced glomerular injury, there was an increase in urine albumin excretion. Treatment with two structurally dissimilar iNOS inhibitors at doses sufficient to decrease urine nitrate and/or nitrite exacerbated proteinuria. In these animals, urine excretion of the isoprostane 8-iso-PGF2alpha (marker of oxidative stress) was increased. In isolated glomeruli incubated with the NOS inhibitor L-NMMA, the permea...Continue Reading

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Jan 9, 2010·Clinical Journal of the American Society of Nephrology : CJASN·Emily S RobinsonBenjamin D Humphreys
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Jan 29, 2011·Diabetes·Christian OttRoland E Schmieder

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