Effects of in vitro nutrient supplementation on polymorphonuclear cell respiratory burst in primary IgA nephropathy
Ventura, M.T.; Gesualdo, L.; Capobianco, V.; Tortorella, C.; Antonaci, S.; Schena, F.P.
Clinical Nephrology 43(1): 14-19
1995
ISSN/ISBN: 0301-0430 PMID: 7697931 Document Number: 441390
Since recent findings have pointed out a kev role for reactive oxygen species in kidney diseases, we investigated superoxide anion (O-2-) and hydrogen peroxide (H-2O-2) generation by peripheral blood polymorphonuclear cells (PMN) in 20 patients with primary IgA nephropathy (IgAN). Results provided evidence for a significant enhancement of O-2- and H-2O-2 production in IgAN subjects in comparison to patients affected by hypertensive renal injury and healthy donors. Among the IgAN group, the highest oxidative metabolism was observed in patients with severe histologic lesions. On the other hand, in vitro vitamin and/or trace element supplementation to PMN suspensions led to a down modulation of their oxidative responsiveness. These data were further supported by the assessment of O-2- release on a kinetic basis. Nutrient pretreatment was in fact able to antagonize either the IgAN-related shortening of the lag period or the increase of maximum O-2- production rate following agonist stimulation. Taken together, these findings indicate that an exaggerated PMN oxidative metabolism occurs in IgAN and suggest a potential role for micronutrients in the modulation of PMN metabolic pathway.