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- W2038287478 abstract "The effect of ApoE on NMDAR-dependent ERK/CREB signaling is isoform-dependent, and ApoE4 accelerates memory decline in ageing. However, this isoform-dependent function on neuronal signaling during ageing is unclear. In this study, we have examined NMDAR-associated ERK/CREB signal transduction in young and aged huApoE3 and huApoE4 targeted replacement (TR) mice. At 12 weeks huApoE4 mouse brain, increased NR1-S896 phosphorylation was linked to higher protein kinase C (PKC) activation. This up-regulation was accompanied by higher phosphorylation of AMPA GluR1-S831, CaMKII, ERK1/2 and CREB. But at 32 weeks, there was no significant difference between huApoE3 and huApoE4 TR mice on NMDAR-associated ERK/CREB signaling. Interestingly, in 72-week-old huApoE4 TR mice, protein phosphorylation that were increased in younger mice were significantly reduced. Lower NR1-S896 phosphorylation was linked to reduced PKC, GluR1-S831, CaMKII, ERK1/2 and CREB phosphorylation in huApoE4 TR mice as compared to huApoE3 TR mice. Furthermore, we have consistently detected lower ApoE levels in young and aged huApoE4 TR mouse brain, and this was associated with reduced expression of the ApoE receptor, LRP1 and NR2A-Y1246 phosphorylation. These results suggest age-specific, isoform-dependent effects of ApoE on neuronal signaling." @default.
- W2038287478 created "2016-06-24" @default.
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- W2038287478 date "2014-10-10" @default.
- W2038287478 modified "2023-10-18" @default.
- W2038287478 title "Reduced neuronal signaling in the ageing apolipoprotein-E4 targeted replacement female mice" @default.
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- W2038287478 doi "https://doi.org/10.1038/srep06580" @default.
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