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• W3099888905 abstract "Dendritic dysfunction is an early event in α-synuclein (α-syn) mediated neurodegeneration. Altered postsynaptic potential and loss of dendritic spines have been observed in different in vitro and in vivo models of synucleinopathies. The integration of newborn neurons into the hippocampus offers the possibility to study dendrite and spine formation in an adult environment. Specifically, survival of hippocampal adult newborn neurons is regulated by synaptic input and was reduced in a mouse model transgenic for human A53T mutant α-syn. We thus hypothesized that dendritic integration of newborn neurons is impaired in the adult hippocampus of A53T mice. We analyzed dendritic morphology of adult hippocampal neurons one month after retroviral labeling. Dendrite length was unchanged in the dentate gyrus of A53T transgenic mice. However, spine density and mushroom spine density of newborn neurons were severely decreased. In this mouse model, transgenic α-syn was expressed both within newborn neurons and within their environment. To specifically determine the cell autonomous effects, we analyzed cell-intrinsic overexpression of A53T α-syn using a retrovirus. Since A53T α-syn overexpressing newborn neurons exhibited decreased spine density one month after labeling, we conclude that cell-intrinsic A53T α-syn impairs postsynaptic integration of adult hippocampal newborn neurons. Our findings further support the role of postsynaptic degeneration as an early feature in synucleinopathies and provide a model system to study underlying mechanisms." @default.
• W3099888905 created "2020-11-23" @default.
• W3099888905 creator A5050301636 @default.
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• W3099888905 date "2020-11-11" @default.
• W3099888905 modified "2023-10-16" @default.
• W3099888905 title "Intracellular A53T Mutant α-Synuclein Impairs Adult Hippocampal Newborn Neuron Integration" @default.
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• W3099888905 doi "https://doi.org/10.3389/fcell.2020.561963" @default.
• W3099888905 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7686440" @default.
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