MicroRNA-107 prevents amyloid-β-induced neurotoxicity and memory impairment in mice

  • Authors:
    • Bohui Shu
    • Xiaoyan Zhang
    • Ganqin Du
    • Qizhi Fu
    • Lina Huang
  • View Affiliations

  • Published online on: December 22, 2017     https://doi.org/10.3892/ijmm.2017.3339
  • Pages: 1665-1672
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Abstract

The pathogenesis of Alzheimer's disease (AD) has still not been fully elucidated, however it is thought that the build up of amyloid plaque at least partially causes the symptoms of AD. MicroRNAs (miRNAs) are endogenous non‑coding small RNA molecules that regulate the expression and degradation of proteins. The present study induced symptoms of AD in mice via intraventricular injection of amyloid‑β 1‑42 (Aβ1‑42), which decreased levels of miR‑107. However, miR‑107 levels increased following administration of miR‑107 mimic, a double‑stranded RNA molecule designed to imitate the native miRNA. Intraventricular injection of Aβ1‑42 aggregates led to spatial memory impairments, inhibited hippocampal long‑term potentiation (LTP) and resulted in the loss of pyramidal cells in the CA1 region of the hippocampus. The miR‑107 mimic reversed the impairments of spatial memory and LTP and the loss of pyramidal neurons caused by Aβ neurotoxicity. Furthermore, the miR‑107 mimic reversed the Aβ‑induced increase in Aβ1‑42 and phosphorylated Tau levels. Critically, Aβ1‑42 injection decreased levels of brain‑derived neurotrophic factor and reduced the phosphorylation of tyrosine receptor kinase B and protein kinase B; these changes were reversed following treatment with the miR‑107 mimic. Collectively, these results demonstrated that miR‑107 may be a potential target for the treatment of AD.
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March 2018
Volume 41 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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APA
Shu, B., Zhang, X., Du, G., Fu, Q., & Huang, L. (2018). MicroRNA-107 prevents amyloid-β-induced neurotoxicity and memory impairment in mice. International Journal of Molecular Medicine, 41, 1665-1672. https://doi.org/10.3892/ijmm.2017.3339
MLA
Shu, B., Zhang, X., Du, G., Fu, Q., Huang, L."MicroRNA-107 prevents amyloid-β-induced neurotoxicity and memory impairment in mice". International Journal of Molecular Medicine 41.3 (2018): 1665-1672.
Chicago
Shu, B., Zhang, X., Du, G., Fu, Q., Huang, L."MicroRNA-107 prevents amyloid-β-induced neurotoxicity and memory impairment in mice". International Journal of Molecular Medicine 41, no. 3 (2018): 1665-1672. https://doi.org/10.3892/ijmm.2017.3339