A short chain synthetic analogue of lipid hydroperoxides was used to overload
glutathione peroxidase (GPx) in human choriocarcinoma cell line JAR cells. Cells
exposed to 100 µM tBuOOH displayed a 40% reduction in ATP level and significantly
increased in membrane permeability, visualised by the lactate dehydrogenase
(LDH) release into the extracellular medium. The intracellular level of
oxygen free radicals measured as an oxidation of the dichlorodihydro-fluorescein
diacetate (H2DCF-DA) significantly increased after 2 hours of cell exposition to
100 µM tBuOOH. Concomitantly MDA, 4-HNE level increased to 2 nmol/mg of
cell protein after 2 hours. Mitochondria stained with MitoTracker Red CMXRos
displayed a filamentous appearance in control cells but changed into granular
less energised organelles after exposition to tBuOOH. Collectively, the above
results indicate the importance of the contribution of oxidative stress in the
development of pre-eclampsia