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• W2593190633 abstract "Increased levels of interleukin (IL)-1β and its gene expression are implicated in the etiology of Alzheimer's disease (AD). IL-1β activates microglia and stimulates glutamatergic N-methyl-d-aspartate receptor NMDA receptor expression, thereby disturbing intracellular Ca2+ homeostasis. Ca2+ disequilibrium, in turn, may trigger endoplasmic reticulum (ER) stress, contributing to overall excitotoxicity and neuronal death that evoke AD. However, it is unclear whether IL-1β-induced neuronal apoptosis is mediated by the glutamatergic system, ER stress and/or Ca2+ dysfunction. The present study investigated the role of NMDA receptor (NMDAR) in ER stress and IL-1β-evoked neuronal death by assessing NMDAR-induced Ca2+ overload and NMDA-mediated ER stress. Male Long Evans rats were treated with IL-1β (with or without NMDAR antagonist MK801) injected intracerebroventricularly for 8days. Glutamate concentration was measured by HPLC, and mRNA and protein expression of microglial biomarkers and NMDAR, as well as markers of Ca2+ overload (caplain2) and ER stress (glucose-regulated protein 78, GRP78, and C/EBP homologous protein-10, CHOP), were assessed by real-time PCR and western blot. Apoptosis was also evaluated in the hippocampal neurons using TUNEL. Overall, IL-1β induced robust neuronal apoptosis, accompanied by upregulated NMDAR, caplain2, GRP78 and CHOP. MK801 pretreatment significantly attenuated neuronal apoptosis and NMDA up-regulation, also reducing GRP78 and CHOP expression. In summary, these results suggest that IL-1β may disturb intracellular Ca2+ homeostasis via NMDAR-mediated mechanism, thereby triggering neuronal apoptosis by enhancing ER stress." @default.
• W2593190633 created "2017-03-16" @default.
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• W2593190633 date "2017-06-01" @default.
• W2593190633 modified "2023-10-13" @default.
• W2593190633 title "N -methyl- d -aspartate receptor-mediated calcium overload and endoplasmic reticulum stress are involved in interleukin-1beta-induced neuronal apoptosis in rat hippocampus" @default.
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• W2593190633 doi "https://doi.org/10.1016/j.jneuroim.2017.03.005" @default.
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