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- W2014137103 abstract "Dendritic defects occur in neurodegenerative diseases accompanied by axonopathy, yet the mechanisms that regulate these pathologic changes are poorly understood. Using Thy1-YFPH mice subjected to optic nerve axotomy, we demonstrate early retraction of retinal ganglion cell (RGC) dendrites and selective loss of mammalian target of rapamycin (mTOR) activity, which precede soma loss. Axonal injury triggered rapid upregulation of the stress-induced protein REDD2 (regulated in development and DNA damage response 2), a potent inhibitor of mTOR. Short interfering RNA-mediated REDD2 knockdown restored mTOR activity and rescued dendritic length, area and branch complexity in a rapamycin-dependent manner. Whole-cell recordings demonstrated that REDD2 depletion leading to mTOR activation in RGCs restored their light response properties. Lastly, we show that REDD2-dependent mTOR activity extended RGC survival following axonal damage. These results indicate that injury-induced stress leads to REDD2 upregulation, mTOR inhibition and dendrite pathology causing neuronal dysfunction and subsequent cell death." @default.
- W2014137103 created "2016-06-24" @default.
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- W2014137103 date "2014-09-26" @default.
- W2014137103 modified "2023-10-17" @default.
- W2014137103 title "REDD2-mediated inhibition of mTOR promotes dendrite retraction induced by axonal injury" @default.
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- W2014137103 doi "https://doi.org/10.1038/cdd.2014.149" @default.
- W2014137103 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4572858" @default.
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