Isolated rat erythrocytes were incubated in the presence of nitrate and nitrite. Glucose, lactate, reduced glutathione, methaemoglobin, malondialdehyde and Na+/K+ membrane exchange were investigated. Nitrite induced a strong methaemoglobinaemia and a net depletion of reduced glutathione in the intracellular medium associated with membrane lipid peroxidation. This oxidative reactivity induced by nitrate and nitrite altered the cell's ionic flux.
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