Abstract
In the central nervous system, members of the Src family of tyrosine kinases (SFKs) are widely expressed and are abundant in neurons. The purpose of this study is to examine whether glycogen synthase-3 (GSK-3) is involved in SFK inhibitor-induced apoptosis. PP2 and SU6656, SFK inhibitors, increased apoptotic cell death with morphological changes that were characterized by cell shrinkage, chromatin condensation, or nuclear fragmentation. Moreover, both activation of caspase-9 and caspase-3 were accompanied by the cell death. GSK-3 inhibitors, such as alsterpaullone and SB216763, prevented the PP2-induced apoptosis. In addition, insulin-like growth factor-I prevented the PP2-induced cell death and PP2 inhibited phosphorylation of focal adhesion kinase (FAK). Phosphorylation of FAK on Tyr 576 by Src activates FAK. These results suggest that inhibition of SFK induces apoptosis possibly via blocking of FAK/phosphatidylinositol-3 kinase/Akt signaling pathway and activation of GSK-3 is involved in the cell death in rat cortical neurons.
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This study was supported in part by a special in-house research grant from Hokuriku University.
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Takadera, T., Fujibayashi, M., Koriyama, Y. et al. Apoptosis Induced by Src-Family Tyrosine Kinase Inhibitors in Cultured Rat Cortical Cells. Neurotox Res 21, 309–316 (2012). https://doi.org/10.1007/s12640-011-9284-5
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DOI: https://doi.org/10.1007/s12640-011-9284-5