Lovastatin reduces glomerular macrophage influx and expression of monocyte chemoattractant protein-1 mRNA in nephrotic rats

American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation
Y S ParkM P O'Donnell

Abstract

Glomerular expression of monocyte chemoattractant protein-1 (MCP-1) and subsequent glomerular macrophage infiltration may play an important role in the development of glomerulosclerosis. Previous studies have shown that lovastatin ameliorates experimental renal disease and reduces MCP-1 expression in serum-stimulated, cultured mesangial cells. We investigated the effects of lovastatin on glomerular MCP-1 expression and macrophage infiltration in rats with puromycin aminonucleoside (PA) nephrosis, an experimental model of renal disease characterized by early macrophage infiltration. Male Sprague-Dawley rats were pretreated for 5 days with either lovastatin (4 mg/kg) or vehicle. At the end of pretreatment, the lovastatin-pretreated rats received a single i.v. injection of PA (50 mg/kg) and continued to receive daily lovastatin thereafter. The vehicle-pretreated rats received i.v. injections of either PA or saline, and continued to receive daily vehicle treatment thereafter. Ten days after PA injection, the vehicle-treated PA rats showed increased (P < 0.05) serum cholesterol (359 +/- 25 mg/100 mL) and urine albumin excretion (343 +/- 95 mg/24 hr), compared with the vehicle-treated control rats (61 +/- 3 mg/100 mL and 2.5 +/- 0.6 ...Continue Reading

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