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Journal of Molecular Neuroscience

, Volume 69, Issue 2, pp 246–253 | Cite as

Orientin Improves Cognition by Enhancing Autophagosome Clearance in an Alzheimer’s Mouse Model

  • Yi Zhong
  • Qing-yu Zheng
  • Cheng-yan Sun
  • Ze Zhang
  • Kun HanEmail author
  • Ning JiaEmail author
Article

Abstract

Alzheimer’s disease (AD) is the most common cause of dementia and is characterized by the presence of β-amyloid (Aβ) plaques and defective autophagy in the brain, which is believed to cause neuronal dysfunction. By using APP/PS1 transgenic AD mice, we investigated the influence of orientin (Ori) on cognitive function and its underlying mechanisms in AD models. Our data indicated that Ori improved spatial learning and memory in APP/PS1 mice, possibly through decreasing brain Aβ deposition and attenuating autophagy impairment. Ori decreased the LC3-II/I ratio, p62 and cathepsin D (Ctsd) protein levels and the number of autolysosomes, whereas the protein levels of Ulk1 and Beclin-1 were no different between the control and treatment groups, indicating increased autolysosome clearance and thus a decreased Aβ burden in the brain. Our results showed that Ori could enhance autolysosome clearance, decrease brain Aβ deposition and improve learning and memory in AD mice.

Keywords

Orientin Autophagy Amyloid beta deposits Alzheimer’s disease 

Notes

Funding Information

This research was supported by grants from the Nature Science Foundation of Liaoning Province (No. 201601357).

Compliance with Ethical Standards

This study is performed consentaneously with the recommendations of Animal Care Committee of Jinzhou Medical University and the protocol was approved by Animal Care committee of Jinzhou Medical University.

Conflict of Interest

The authors declare that there is no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of NeurologyThe First Affiliated Hospital of Jinzhou Medical UniversityJinzhouPeople’s Republic of China
  2. 2.Department of AnatomyFoundation Institute of Jinzhou Medical UniversityJinzhouPeople’s Republic of China

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