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Abstract

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Protocol

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Materials

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Engineering

Nerve Stem Cell Differentiation by a One-step Cold Atmospheric Plasma Treatment In Vitro

Published: January 11th, 2019

DOI:

10.3791/58663

1State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, 2College of Life Science and Health, Wuhan University of Science and Technology, 3Department of Pathophysiology, Beijing Neurosurgical Institute/Beijing Tiantan Hospital, Capital Medical University
* These authors contributed equally

This protocol aims to provide detailed experimental steps of a cold atmospheric plasma treatment on neural stem cells and immunofluorescence detection for differentiation enhancement.

As the development of physical plasma technology, cold atmospheric plasmas (CAPs) have been widely investigated in decontamination, cancer treatment, wound healing, root canal treatment, etc., forming a new research field named plasma medicine. Being a mixture of electrical, chemical, and biological reactive species, CAPs have shown their abilities to enhance nerve stem cells differentiation both in vitro and in vivo and are becoming a promising way for neurological disease treatment in the future. The much more exciting news is that using CAPs may realize one-step, and safely directed, differentiation of neural stem cells (NSCs) for tissue transportation. We demonstrate here the detailed experimental protocol of using a self-made CAP jet device to enhance NSC differentiation in C17.2-NSCs and primary rat neural stem cells, as well as observing the cell fate by inverted and fluorescence microscopy. With the help of immunofluorescence staining technology, we found both the NSCs showed an accelerated differential rate than the untreated group, and ~75% of the NSCs selectively differentiated into neurons, which are mainly mature, cholinergic, and motor neurons.

The directed differentiation of NSCs into a certain lineage for tissue transportation is considered one of the most promising therapies for neurodegenerative and neurotraumatic diseases1. For example, catecholaminergic dopaminergic neurons are especially desired in Parkinson's disease (PD) treatment. However, traditional methods to prepare the desired cells for transportation have many drawbacks, such as chemical toxicity, scar formation, or others, which largely hampers the applications of NSCs in regenerative medicine2. Therefore, it is very necessary to find a novel and safe way for NSC differentiation.

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1. Cell Cultures and Predifferentiation

  1. Neural stem cell culture and predifferentiation
    1. Prepare poly-D-lysine-coated coverslips. Put a sterile coverslip (20 mm in diameter) into a 12-well plate. Coat the cover glass with poly-D-lysine, 0.1% w/v, in water (Table of Materials) for better cell adhesion on the coverslips by following the next steps.
      NOTE: Optimal conditions must be determined for each cell line and application.
      1. Aseptically coat t.......

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Cell morphology was observed under the inverted microscope every day after the CAP treatment. Figure 2 shows the ordinary inverted phase-contrast light microscope images of the cell differentiation in both cell lines. The plasma-treated group exhibits an accelerated differentiation rate and a high differentiation ratio compared to the control and gas flow group.

The immunofluorescen.......

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C17.2-NSCs is a kind of immortalized neural stem cell line from neonatal mouse cerebellar granular layer cells, developed by Snyder and others10,11. C17.2-NSCs can differentiate into neurons, astrocytes, and oligodendrocytes and are widely used in neuroscience12. In our previous study, CAPs could enhance the differentiation of C17.2-NSCs into neurons. A proof-of-principle study was also carried out using primary rat NSCs, and the effect of.......

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This work was supported by the Huazhong Scholar Program, the Independent Innovation Fund of the Huazhong University of Science and Technology (No. 2018KFYYXJJ071), and the National Natural Science Foundation of China (Nos. 31501099 and 51707012).

....

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Name Company Catalog Number Comments
Coverslip NEST 801008
Poly-D-lysine Beyotime P0128
DMEM medium HyClone SH30022.01B stored at 4 °C
DMEM/F12 medium HyClone SH30023.01B stored at 4 °C
N2 supplement Gibco 17502048 stored at -20 °C and protect from light
B27 supplement Gibco 17504044 stored at -20 °C and protect from light
Fetal bovine serum HyClone SH30084.03 stored at -20 °C, avoid repeated freezing and thawing
Donor Horse serum HyClone SH30074.03 tored at -20 °C, avoid repeated freezing and thawing
Penicillin/Streptomycin HyClone SV30010 stored at 4 °C
Trypsin HyClone 25300054 stored at 4 °C
PBS solution HyClone SH30256.01B stored at 4 °C
4% paraformaldehyde Beyotime P0098 stored at -20 °C
TritonX-100 Sigma T8787
Normal Goat Serum Blocking Solution Vector Laboratories S-1000-20 stored at 4 °C
anti-Nestin Beyotime AF2215 stored at -20 °C, avoid repeated freezing and thawing
anti-β-Tubulin III Sigma Aldrich T2200 stored at -20 °C, avoid repeated freezing and thawing
anti-O4 R&D Systems MAB1326 stored at -20 °C, avoid repeated freezing and thawing
anti-NF200 Sigma stored at -20 °C, avoid repeated freezing and thawing
anti-ChAT Sigma stored at -20 °C, avoid repeated freezing and thawing
anti- LHX3 Sigma stored at -20 °C, avoid repeated freezing and thawing
anti-GABA Sigma stored at -20 °C, avoid repeated freezing and thawing
anti-Serotonin Abcam, Cambridge, MA stored at -20 °C, avoid repeated freezing and thawing
anti-TH Abcam, Cambridge, MA stored at -20 °C, avoid repeated freezing and thawing
Immunol Staining Primary Antibody Dilution Buffer Beyotime P0103 stored at 4 °C
Cy3 Labeled Goat Anti-Rabbit IgG Beyotime A0516 stored at -20 °C and protect from light
Alexa Fluor 488- Labeled Goat Beyotime A0428 stored at -20 °C and protect from light
Anti-Mouse IgG 
12-well plate corning 3512
25 cm2 flask corning 430639
Hoechst 33258 Beyotime C1018 stored at -20 °C and protect from light
Mounting medium Beyotime P0128 stored at -20 °C and protect from light
Light microscope Nanjing Jiangnan Novel Optics Company XD-202
Fluorescence microscopy Nikon 80i
High – voltage Power Amplifier Directed Energy PVX-4110
DC power supply Spellman SL1200
Function Generator Aligent  33521A
Oscilloscope Tektronix DPO3034
High voltage probe Tektronix P6015A

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