Abstract
The gene encoding isocitrate dehydrogenase (IDH) is somatically mutated predominantly in secondary glioblastoma multiforme. Mutations of IDH1 and IDH2 lead to simultaneous loss and gain of activities in the production of α-ketoglutarate and 2-hydroxyglutarate, respectively. Lithium chloride was recently proved efficient in inhibiting glioma cell migration. The mechanism of lithium chloride on C6 glioma cells harboring IDH2 mutation has not been studied. Here, we found lithium chloride induced inhibitive effects on cell proliferation of both C6 glioma cells with and without IDH2 mutation, although IDH2 mutation increased the stability of HIF-1α. GSK-3β could be phosphorylated at Ser9 and its activity was inhibited when C6 glioma cells were treated by lithium chloride. The degree of phosphorylation in IDH2R172G treatment group was lower than that as compared to the control and IDH2 treatment groups. At the same time, the accumulation of β-catenin in C6 cell nucleus was decreased. Moreover, although the β-catenin and HIF-1α increased the secretion of metalloproteinase-2,-9 in C6 glioma cells harboring IDH2 mutation, the migration potential of lithium chloride-treated C6 glioma cells harboring the IDH2 and its mutant was uniform. These results indicated lithium chloride could decrease the proliferation and migration potential of C6 glioma cells harboring IDH2 mutation.
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Acknowledgments
This work was supported partially by “National Natural Science Foundation of China” (No.31272100 and No.31372199), the “National High Technology Research and Development Program of China (863 Program)” (No. 2012AA020809), and the Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi. KG Chan thanks the HIR Grant from the University of Malaya (HIR/MOHE H00001-500027).
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Fu, Y., Zheng, Y., Chan, KG. et al. Lithium chloride decreases proliferation and migration of C6 glioma cells harboring isocitrate dehydrogenase 2 mutant via GSK-3β. Mol Biol Rep 41, 3907–3913 (2014). https://doi.org/10.1007/s11033-014-3258-7
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DOI: https://doi.org/10.1007/s11033-014-3258-7