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- W2017350971 abstract "N-Methyl-d-aspartate (NMDA) receptors (NMDARs), which play a key role in synaptic plasticity, are dynamically regulated by many signaling molecules and scaffolding proteins. Although actin cytoskeleton has been implicated in regulating NMDAR stability in synaptic membrane, the role of microtubules in regulating NMDAR trafficking and function is largely unclear. Here we show that microtubule-depolymerizing agents inhibited NMDA receptor-mediated ionic and synaptic currents in cortical pyramidal neurons. This effect was Ca2+-independent, required GTP, and was more prominent in the presence of high NMDA concentrations. The NR2B subunit-containing NMDA receptor was the primary target of microtubules. The effect of microtubule depolymerizers on NMDAR currents was blocked by cellular knockdown of the kinesin motor protein KIF17, which transports NR2B-containing vesicles along microtubule in neuronal dendrites. Neuromodulators that can stabilize microtubules, such as brain-derived neurotrophic factor, significantly attenuated the microtubule depolymerizer-induced reduction of NMDAR currents. Moreover, immunocytochemical studies show that microtubule depolymerizers decreased the number of surface NR2B subunits on dendrites, which was prevented by the microtubule stabilizer. Taken together, these results suggest that interfering with microtubule assembly suppresses NMDAR function through a mechanism dependent on kinesin-based dendritic transport of NMDA receptors." @default.
- W2017350971 created "2016-06-24" @default.
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- W2017350971 date "2005-08-01" @default.
- W2017350971 modified "2023-10-16" @default.
- W2017350971 title "Microtubule Regulation of N-Methyl-D-aspartate Receptor Channels in Neurons" @default.
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- W2017350971 doi "https://doi.org/10.1074/jbc.m504499200" @default.
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