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- W2337215808 abstract "Activation of NMDA receptors can induce iron movement into neurons by the small GTPase Dexras1 via the divalent metal transporter 1 (DMT1). This pathway under pathological conditions such as NMDA excitotoxicity contributes to metal-catalyzed reactive oxygen species (ROS) generation and neuronal cell death, and yet its physiological role is not well understood.We found that genetic and pharmacological ablation of this neuronal iron pathway in the mice increased glutamatergic transmission. Voltage sensitive dye imaging of hippocampal slices and whole-cell patch clamping of synaptic currents, indicated that the increase in excitability was due to synaptic modification of NMDA receptor activity via modulation of the PKC/Src/NR2A pathway. Moreover, we identified that lysosomal iron serves as a main source for intracellular iron signaling modulating glutamatergic excitability.Our data indicates that intracellular iron is dynamically regulated in the neurons and robustly modulate synaptic excitability under physiological condition. Since NMDA receptors play a central role in synaptic neurophysiology, plasticity, neuronal homeostasis, neurodevelopment as well as in the neurobiology of many diseases, endogenous iron is therefore likely to have functional relevance to each of these areas." @default.
- W2337215808 created "2016-06-24" @default.
- W2337215808 creator A5002934354 @default.
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- W2337215808 date "2016-04-14" @default.
- W2337215808 modified "2023-09-29" @default.
- W2337215808 title "Lysosomal iron modulates NMDA receptor-mediated excitation via small GTPase, Dexras1" @default.
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- W2337215808 doi "https://doi.org/10.1186/s13041-016-0220-8" @default.
- W2337215808 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4832449" @default.
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