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Brain Res. 2016 Mar 1;1634:34-44. doi: 10.1016/j.brainres.2015.11.029. Epub 2015 Nov 24.

Lingo-1 shRNA and Notch signaling inhibitor DAPT promote differentiation of neural stem/progenitor cells into neurons.

Author information

1
Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China; Department of Pathology, The First Affiliated Hospital and Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou 510080, China.
2
Department of Rheumatology, The Futian Affiliated Hospital, Guangdong Medical College, Dongguan 518000, China.
3
Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China.
4
Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA.
5
Department of Spine Surgery, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China.
6
Research Center of Translational Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China. Electronic address: dengyub@mail.sysu.edu.cn.

Abstract

Determination of the exogenous factors that regulate differentiation of neural stem/progenitor cells into neurons, oligodendrocytes and astrocytes is an important step in the clinical therapy of spinal cord injury (SCI). The Notch pathway inhibits the differentiation of neural stem/progenitor cells and Lingo-1 is a strong negative regulator for myelination and axon growth. While Lingo-1 shRNA and N-[N-(3, 5-difluorophenacetyl)-1-alanyl]-S-Phenylglycinet-butylester (DAPT), a Notch pathway inhibitor, have been used separately to help repair SCI, the results have been unsatisfactory. Here we investigated and elucidated the preliminary mechanism for the effect of Lingo-1 shRNA and DAPT on neural stem/progenitor cells differentiation. We found that neural stem/progenitor cells from E14 rat embryos expressed Nestin, Sox-2 and Lingo-1, and we optimized the transduction of neural stem/progenitor cells using lentiviral vectors encoding Lingo-1 shRNA. The addition of DAPT decreased the expression of Notch intracellular domain (NICD) as well as the downstream genes Hes1 and Hes5. Expression of NeuN, CNPase and GFAP in DAPT treated cells and expression of NeuN in Lingo-1 shRNA treated cells confirmed differentiation of neural stem/progenitor cells into neurons, oligodendrocytes and astrocytes. These results revealed that while Lingo-1 shRNA and Notch signaling inhibitor DAPT both promoted differentiation of neural stem cells into neurons, only DAPT was capable of driving neural stem/progenitor cells differentiation into oligodendrocytes and astrocytes. Since we were able to show that both Lingo-1 shRNA and DAPT could drive neural stem/progenitor cells differentiation, our data might aid the development of more effective SCI therapies using Lingo-1 shRNA and DAPT.

KEYWORDS:

Differentiation; Lingo-1; Neural stem/progenitor cells; Neurons; Notch signaling; Proliferation

PMID:
26607252
DOI:
10.1016/j.brainres.2015.11.029
[Indexed for MEDLINE]
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