Celecoxib, indomethacin, and ibuprofen prevent 6-hydroxydopamine-induced PC12 cell death through the inhibition of NFκB and SAPK/JNK pathways

The possible action of nonsteroidal anti-inflammatory drugs (NSAIDs) in the reduction of reactive oxygen species (ROS) and also as anti-apoptotic agents may suggest them as putative agents for the treatment of neurodegenerative diseases. This study was designed to explore some pathways alterations induced by NSAIDs following 6-hydroxydopamine (6-OHDA)-induced cell death in PC12 cells as an in vitro model of Parkinson's disease (PD) and to compare the effects of celecoxib, indomethacin and ibuprofen. Materials and Methods: The cell viability, ROS content, glutathione (GSH) level, and apoptosis were measured using resazurin, dichlorofluorescein diacetate (DCFH-DA), 5,5′-dithiobis-2-nitrobenzoic acid (DTNB), propidium iodide (PI) and flowcytometry, real-time PCR and western blot. Results: Based on the results, pretreatment with celecoxib, indomethacin and ibuprofen for 24 hr significantly induced concentration and time-dependent protection against 6-OHDA-induced PC12 cell death. Cell viability (P<0.001), GSH level (P<0.01) and cytoplasmic content of nuclear factor kappa B (NFκB) (P<0.01) were increased, also ROS content (P<0.001) and apoptosis biomarkers such as the cleaved caspase-3 (P<0.001), Bax (P<0.01), phospho- stress-activated protein kinases / c-Jun N-terminal kinases (P-SAPK/JNK) (P<0.01) and cleaved poly ADP ribose polymerase (PARP) (P<0.001) protein levels were all decreased after pretreatment of cells with NSAIDs in 6-OHDAinduced PC12 cells. Conclusion: It is suggested that NFκB and SAPK/JNK pathways have an important role in 6-OHDAinduced cell injury. Overall, it seems that pretreatment with NSAIDs protect dopaminergic cells and may have the potential to slow the progression of PD.