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Molecular Neurodegeneration
Published in: Molecular Neurodegeneration 1/2015

Open Access 01-12-2015 | Research article

Human neural stem cells alleviate Alzheimer-like pathology in a mouse model

Authors: Il-Shin Lee, Kwangsoo Jung, Il-Sun Kim, Haejin Lee, Miri Kim, Seokhwan Yun, Kyujin Hwang, Jeong Eun Shin, Kook In Park

Published in: Molecular Neurodegeneration | Issue 1/2015

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Abstract

Background

Alzheimer’s disease (AD) is an inexorable neurodegenerative disease that commonly occurs in the elderly. The cognitive impairment caused by AD is associated with abnormal accumulation of amyloid-β (Aβ) and hyperphosphorylated tau, which are accompanied by inflammation. Neural stem cells (NSCs) are self-renewing, multipotential cells that differentiate into distinct neural cells. When transplanted into a diseased brain, NSCs repair and replace injured tissues after migration toward and engraftment within lesions. We investigated the therapeutic effects in an AD mouse model of human NSCs (hNSCs) that derived from an aborted human fetal telencephalon at 13 weeks of gestation. Cells were transplanted into the cerebral lateral ventricles of neuron-specific enolase promoter-controlled APPsw-expressing (NSE/APPsw) transgenic mice at 13 months of age.

Results

Implanted cells extensively migrated and engrafted, and some differentiated into neuronal and glial cells, although most hNSCs remained immature. The hNSC transplantation improved spatial memory in these mice, which also showed decreased tau phosphorylation and Aβ42 levels and attenuated microgliosis and astrogliosis. The hNSC transplantation reduced tau phosphorylation via Trk-dependent Akt/GSK3β signaling, down-regulated Aβ production through an Akt/GSK3β signaling-mediated decrease in BACE1, and decreased expression of inflammatory mediators through deactivation of microglia that was mediated by cell-to-cell contact, secretion of anti-inflammatory factors generated from hNSCs, or both. The hNSC transplantation also facilitated synaptic plasticity and anti-apoptotic function via trophic supplies. Furthermore, the safety and feasibility of hNSC transplantation are supported.

Conclusions

These findings demonstrate the hNSC transplantation modulates diverse AD pathologies and rescue impaired memory via multiple mechanisms in an AD model. Thus, our data provide tangible preclinical evidence that human NSC transplantation could be a safe and versatile approach for treating AD patients.
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Metadata
Title
Human neural stem cells alleviate Alzheimer-like pathology in a mouse model
Authors
Il-Shin Lee
Kwangsoo Jung
Il-Sun Kim
Haejin Lee
Miri Kim
Seokhwan Yun
Kyujin Hwang
Jeong Eun Shin
Kook In Park
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Molecular Neurodegeneration / Issue 1/2015
Electronic ISSN: 1750-1326
DOI
https://doi.org/10.1186/s13024-015-0035-6

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