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• W2884594775 abstract "Summary Aim Sleep disorders are common in Alzheimer's disease (AD) and assumed to directly influence cognitive function and disease progression. This study evaluated sleep characteristics in a rat model of AD that was induced by intracerebroventricular streptozotocin (STZ) administration and assessed the possible underlying mechanisms. Methods Cognition ability was assessed in the Morris water maze in rats. Sleep parameters were analyzed by electroencephalographic and electromyographic recordings. Neuronal activity in brain areas that regulate sleep‐wake states was evaluated by double‐staining immunohistochemistry. High‐performance liquid chromatography with electrochemical detection was used to detect neurotransmitter levels. Results Fourteen days after the STZ injection, the rats exhibited sleep disorders that were similar to those in AD patients, reflected by a significant increase in wakefulness and decreases in nonrapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. The c‐Fos expression analysis indicated that neuronal activity and the number of neurons in the dorsal raphe nucleus and locus coeruleus decreased in STZ‐injected rats. In the ventrolateral preoptic nucleus (VLPO), the activity of γ‐aminobutyric acid (GABA) neurons was suppressed. In the arousal‐driving parabrachial nucleus (PBN), GABAergic activity was suppressed, whereas glutamatergic activity was promoted. The neurotransmitter analysis revealed a reduction in GABA in the VLPO and PBN and elevation of glutamate in the PBN. A direct injection of the GABA A receptor antagonist bicuculline in the PBN in normal rats induced a similar pattern of sleep disorder as in STZ‐injected rats. A microinjection of GABA in the PBN improved sleep disorders that were induced by STZ. Conclusion These results suggest that the reduction in GABAergic inhibition in the PBN and VLPO may be involved in sleep disorders that are induced by STZ. Our novel findings encourage further studies that investigate mechanisms of sleep regulation in sporadic AD." @default.
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• W2884594775 date "2018-07-16" @default.
• W2884594775 modified "2023-10-14" @default.
• W2884594775 title "Intracerebroventricular streptozotocin‐induced Alzheimer's disease‐like sleep disorders in rats: Role of the GABAergic system in the parabrachial complex" @default.
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• W2884594775 doi "https://doi.org/10.1111/cns.13032" @default.
• W2884594775 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6490136" @default.
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