Navβ2 knockdown improves cognition in APP/PS1 mice by partially inhibiting seizures and APP amyloid processing

Tao Hu, Zhangang Xiao, Rui Mao, Bo Chen, Min-Nan Lu, Jun Tong, Rong Mei, Shan-Shan Li, Zhi-cheng Xiao, Lian-Feng Zhang, Yan-Bin XiYang

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

Voltage-gated sodium channels beta 2 (Navβ2, encoded by SCN2B) is a substrate of β-site amyloid precursor protein cleaving enzyme 1 (BACE1) and regulates cell surface expression of channels in neurons. Previous studies reported enhanced Navβ2 processing by BACE1 in Alzheimer's disease (AD) model and patients. We investigated whether changes in Navβ2 expression affect neuronal seizure and amyloid precursor protein (APP) processing in an AD mouse model. Our study used eight-month-old APP/presenilin 1 (PS1) mice and transgenic Navβ2 knockdown [by 61% vs. wild type (WT)] APP/PS1 mice (APP/PS1/Navβ2-kd), with age-matched WT and Navβ2 knockdown (Navβ2-kd) mice as controls. We found that Navβ2 knockdown in APP/PS1 mice partially reversed the abnormal Navβ2 cleavage and the changes in intracellular and total Nav1.1a expression. It also restored sodium currents density in hippocampal neurons and neuronal activity, as indicated by EEG tracing; improved Morris water maze performance; and shifted APP amyloidogenic metabolism towards non-amyloidogenic processing. There were no differences in these indicators between WT and Navβ2-kd mice. These results suggest Navβ2 knockdown may be a promising strategy for treating AD.

Original languageEnglish
Pages (from-to)99284-99295
Number of pages12
JournalOncotarget
Volume8
Issue number59
DOIs
Publication statusPublished - 16 Oct 2017

Keywords

  • Alzheimer's disease
  • APP/PS1 mouse
  • Cognition
  • Gerotarget
  • Neuronal activity
  • Voltage-gated sodium channels beta 2

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