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Erschienen in: NeuroMolecular Medicine 1/2020

08.10.2019 | Original Paper

Driving Neurogenesis in Neural Stem Cells with High Sensitivity Optogenetics

verfasst von: Daniel Boon Loong Teh, Ankshita Prasad, Wenxuan Jiang, Nianchen Zhang, Yang Wu, Hyunsoo Yang, Sanyang Han, Zhigao Yi, Yanzhuang Yeo, Toru Ishizuka, Limsoon Wong, Nitish Thakor, Hiromu Yawo, Xiaogang Liu, Angelo All

Erschienen in: NeuroMolecular Medicine | Ausgabe 1/2020

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Abstract

Optogenetic stimulation of neural stem cells (NSCs) enables their activity-dependent photo-modulation. This provides a spatio-temporal tool for studying activity-dependent neurogenesis and for regulating the differentiation of the transplanted NSCs. Currently, this is mainly driven by viral transfection of channelrhodopsin-2 (ChR2) gene, which requires high irradiance and complex in vivo/vitro stimulation systems. Additionally, despite the extensive application of optogenetics in neuroscience, the transcriptome-level changes induced by optogenetic stimulation of NSCs have not been elucidated yet. Here, we made transformed NSCs (SFO-NSCs) stably expressing one of the step-function opsin (SFO)-variants of chimeric channelrhodopsins, ChRFR(C167A), which is more sensitive to blue light than native ChR2, via a non-viral transfection system using piggyBac transposon. We set up a simple low-irradiance optical stimulation (OS)-incubation system that induced c-fos mRNA expression, which is activity-dependent, in differentiating SFO-NSCs. More neuron-like SFO-NCSs, which had more elongated axons, were differentiated with daily OS than control cells without OS. This was accompanied by positive/negative changes in the transcriptome involved in axonal remodeling, synaptic plasticity, and microenvironment modulation with the up-regulation of several genes involved in the Ca2+-related functions. Our approach could be applied for stem cell transplantation studies in tissue with two strengths: lower carcinogenicity and less irradiance needed for tissue penetration.
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Metadaten
Titel
Driving Neurogenesis in Neural Stem Cells with High Sensitivity Optogenetics
verfasst von
Daniel Boon Loong Teh
Ankshita Prasad
Wenxuan Jiang
Nianchen Zhang
Yang Wu
Hyunsoo Yang
Sanyang Han
Zhigao Yi
Yanzhuang Yeo
Toru Ishizuka
Limsoon Wong
Nitish Thakor
Hiromu Yawo
Xiaogang Liu
Angelo All
Publikationsdatum
08.10.2019
Verlag
Springer US
Erschienen in
NeuroMolecular Medicine / Ausgabe 1/2020
Print ISSN: 1535-1084
Elektronische ISSN: 1559-1174
DOI
https://doi.org/10.1007/s12017-019-08573-3

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