Abstract
Glioblastoma multiforme is the most undifferentiated type of brain tumor, and its prognosis is extremely poor. Glioblastoma cells exhibit highly migratory and invasive behavior, which makes surgical intervention unsuccessful. Here, we showed that glioblastoma cells express Ca2+-permeable α-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA)-type glutamate receptors assembled from the GluR1 and/or GluR4 subunits, and that their conversion to Ca2+-impermeable receptors by adenovirus-mediated transfer of the GluR2 cDNA inhibited cell locomotion and induced apoptosis. In contrast, overexpression of Ca2+-permeable AMPA receptors facilitated migration and proliferation of the tumor cells. These findings indicate that Ca2+-permeable AMPA receptors have crucial roles in growth of glioblastoma. Blockage of these Ca2+-permeable receptors may be a useful therapeutic strategy for the prevention of glioblastoma invasion.
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Acknowledgements
We thank I. Saito and Y. Kanegae for materials for constructing recombinant adenoviruses; M. Kondo for DNA templates for GluR1 and GluR2 to produce RNA probes for in situ hybridization; and M. Maniwa for technical assistance.
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Ishiuchi, S., Tsuzuki, K., Yoshida, Y. et al. Blockage of Ca2+-permeable AMPA receptors suppresses migration and induces apoptosis in human glioblastoma cells. Nat Med 8, 971–978 (2002). https://doi.org/10.1038/nm746
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DOI: https://doi.org/10.1038/nm746
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