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- W2914769084 abstract "Postsynaptic density 95 (PSD-95), the major scaffold protein at excitatory synapses, plays a major role in mediating intracellular signaling by synaptic N-methyl-d-aspartate (NMDA) type glutamate receptors. Despite the fact that much is known about the role of PSD-95 in NMDA-mediated toxicity, less is known about its role in mechanical injury, and more specifically, in traumatic brain injury (TBI). Given that neural circuitry is disrupted after TBI and that PSD-95 and its interactors end-binding protein 3 (EB3) and adenomatous polyposis coli (APC) shape dendrites, we examined whether changes to these proteins and their interactions occur after brain trauma. Here, we report that total levels of PSD-95 and the interaction of PSD-95 with EB3 increase at 1 and 7 days after moderate controlled cortical impact (CCI), but these changes do not occur after mild injury. Because changes occur to PSD-95 following brain trauma in vivo, we next considered the functional consequences of PSD-95 alterations in vitro. Rapid deformation of cortical neurons leads to neuronal death 72 h after injury, but this outcome is not dependent on PSD-95 expression. However, disruptions in dendritic arborization following stretch injury in vitro require PSD-95 expression, and these changes in arborization can be mimicked with expression of PSD-95 mutants lacking the second PDZ domain. Thus, PSD-95 and its interactors may serve as therapeutic targets for repairing dendrites after TBI." @default.
- W2914769084 created "2019-02-21" @default.
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- W2914769084 date "2019-07-01" @default.
- W2914769084 modified "2023-09-24" @default.
- W2914769084 title "A Role for Postsynaptic Density 95 and Its Binding Partners in Models of Traumatic Brain Injury" @default.
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- W2914769084 doi "https://doi.org/10.1089/neu.2018.6291" @default.
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