Authors: Gültekin YÜCEL, Saadet GÜMÜŞLÜ, Akın YEŞİLKAYA, Hasan AKIN, Aslan AKSU
Abstract: The purpose of this study was examination of the effect of the reduced nicotinamid adenine dinucleotide phosphate (NADPH) and reduced nicotinamid adenine dinucleotide (NADH) on erythrocytes against cumene hydroperoxide induced oxidative stress. Erythrocytes of 18 healthy volunteers were incubated with cumene hydroperoxide in the presence and absence of NADPH or NADH. Final concentrations in the incubation medium were hemoglobin 0.05 g/dl, luminol 3.75 \mumol/L, cumene hydroperoxide 125 \mumol/L, NADPH or NADH 0.1 mmol/L. Extracellularly added NADPH and NADH extensively diminished luminol amplified chemiluminescence induced by cumene hydroperoxide and retarded maximum peroxidation time (P<0.001). NADPH and NADH were not found superior to each other in the protection of erythrocytes against oxidative stress.
Keywords: NADH, NADPH, erythrocytes, oxidative stress, cumene hydroperoxide.