ABSTRACT
Growth arrest-specific 1 (Gas1) protein acts as an inhibitor of cell growth and a mediator of cell death in nervous system during development and is also re-expressed in adult neurons during excitotoxic insult. Due to its structural similarity to the glial cell-derived neurotrophic factor family receptors α (GFRα), Gas1 is likely to interfere with the neuroprotective effect of GDNF. In the present study, we investigated the expression profile of Gas1 during glutamate insults in human SH-SY5Y neuroblastoma cells as well as the influence of Gas1 inhibition on the protective effect of GDNF against glutamate-induced cell injury. Our data showed that Gas1 expression was significantly increased with the treatment of glutamate in SH-SY5Y cells. The silencing of Gas1 by small interfering RNA promoted the protective effect of GDNF against glutamate-induced cytotoxicity as well as cell apoptosis, which effect was likely mediated through activating Akt/PI3 K-dependent cell survival signaling pathway and inhibiting mitochondrial-dependent cell apoptosis signaling pathway via Bad dephosphorylation blockade. In summary, this study showed the synergistic effect of Gas1 inhibition and GDNF against glutamate-induced cell injury in human SH-SY5Y neuroblastoma cells, which information might significantly contribute to better understanding the function of Gas1 in neuronal cells and form the basis of the therapeutic development of GDNF in treating human neurodegenerative diseases in the future.
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This work was supported by grants from the National Natural Science Foundation (81300787), the Natural Science Foundation of Jiangsu Province (BK2011168, BK2012105, BK20141103), and the Major Project of Wuxi Municipal Health Bureau (ZS201401).
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Wang, K., Zhu, X., Zhang, K. et al. Gas1 Knockdown Increases the Neuroprotective Effect of Glial Cell-Derived Neurotrophic Factor Against Glutamate-Induced Cell Injury in Human SH-SY5Y Neuroblastoma Cells. Cell Mol Neurobiol 36, 603–611 (2016). https://doi.org/10.1007/s10571-015-0241-3
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DOI: https://doi.org/10.1007/s10571-015-0241-3