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Citicoline increases glutathione redox ratio and reduces caspase-3 activation and cell death in staurosporine-treated SH-SY5Y human neuroblastoma cells.
Brain Research 2002 December 7
Citicoline, or CDP-choline, is an essential endogenous intermediate in the biosynthesis of phosphatidylcholine that may act as a neuroprotector in several models of neurodegeneration. The present study analyses the effects of citicoline in the paradigm of staurosporine-induced cell death in human SH-SY5Y neuroblastoma cells. Citicoline reduces apoptosis induced by 100 nM staurosporine for 12 h in SH-SY5Y cells. This effect is higher with pre-treatment of 60 mM citicoline for 24 h after staurosporine challenge. Moreover, citicoline treatment restores glutathione redox ratio diminished after staurosporine challenge. Finally, citicoline also reduces the expression levels of active caspase-3 and specific PARP-cleaved products of 89 kDa resulting from staurosporine exposure when citicoline is added to the culture medium 24 h before staurosporine. These findings demonstrate that citicoline affects the staurosporine-induced apoptosis cell-signalling pathway by interacting with the glutathione system and by inhibiting caspase-3 in SH-SY5Y human neuroblastoma cells.
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