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• W2093132362 abstract "Administration of subanesthetic concentrations of ketamine, a noncompetitive antagonist of the N-methyl-d-aspartate (NMDA) type of glutamate receptors, is a widely accepted therapeutic modality in perioperative and chronic pain management. Although extensive clinical use has demonstrated its safety, recent human histopathological observations as well as laboratory data suggest that ketamine can exert adverse effects on central nervous system neurons. To further investigate this issue, the present study was designed to evaluate the effects of ketamine on the survival and dendritic arbor architecture of differentiated γ-aminobutyric acidergic (GABAergic) interneurons in vitro. We show that short-term exposure of cultures to ketamine at concentrations of ≥20 μg/ml leads to a significant cell loss of differentiated cells and that non-cell death-inducing concentrations of ketamine (10 μg/ml) can still initiate long-term alterations of dendritic arbor in differentiated neurons, including dendritic retraction and branching point elimination. Most importantly, we also demonstrate that chronic (>24 h) administration of ketamine at concentrations as low as 0.01 μg/ml can interfere with the maintenance of dendritic arbor architecture. These results raise the possibility that chronic exposure to low, subanesthetic concentrations of ketamine, while not affecting cell survival, could still impair neuronal morphology and thus might lead to dysfunctions of neural networks." @default.
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• W2093132362 date "2007-05-01" @default.
• W2093132362 modified "2023-10-16" @default.
• W2093132362 title "Low concentrations of ketamine initiate dendritic atrophy of differentiated GABAergic neurons in culture" @default.
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• W2093132362 doi "https://doi.org/10.1016/j.tox.2007.03.004" @default.
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