Name: purification of fibroblasts and schwann cells from sensory and motor nerves in vitro
Uploaded: 2020-05-20T13:00:00
Description: Watch this Scientific Journal Video about Purification of Fibroblasts and Schwann Cells from Sensory and Motor Nerves in Vitro at JoVE.com

This study was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0104703), the National Natural Foundation of China (Grant No. 31500927).

This study was carried out in accordance with the Institutional Animal Care Guidelines of Nantong University. All the procedures including the animal subjects were ethically approved by the Administration Committee of Experimental Animals, Jiangsu Province, China.
1. Isolation and culture of motor and sensory nerve fibroblasts and SCs
<ol>
	<li>Use seven-day-old Sprague-Dawley (SD) rats (n=4) provided by the Experimental Animal Center of Nantong University of China. Place the rats in a tank ...

<ol>
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The two major cell populations of peripheral nerves included SCs and fibroblasts. The primarily cultured fibroblasts and SCs can accurately assist in modeling the physiology of fibroblasts and SCs during peripheral nerve development and regeneration. The study showed that P7 rat sciatic nerve cells contained about 85% of S100-positive SCs, 13% of OX7-positive fibroblasts and only 1.5% of OX42-positive macrophages13. Although the number of fibroblasts is less than SCs, the initial proliferation rat...

In the peripheral nervous system, the nerve fibers mainly consists of axons, Schwann cells (SCs), and fibroblasts, and also contains a small number of macrophages, microvascular endothelial cells, and immune cells1. SCs wrap the axons in a 1:1 ratio and are enclosed by a connective tissue layer called the endoneurium. The axons are then bundled together to form groups called fascicles, and each fascicle is wrapped in a connective tissue layer known as the perineurium. Finally, the whole nerve fiber is wrapped in a layer of connective tissue, which is termed as the epineurium. In the endoneurium, the whole cell population is comprised of 48% SCs, and a substantial portion of the remaining cells involves fibroblasts2. Furthermore, fibroblasts are important components of all nerve compartments, including the epineurium, the perineurium, and the endoneurium3. Many studies have indicated that SCs and fibroblasts play a crucial role in the regeneration process after peripheral nerve injuries4,5,6. After transection of the peripheral nerve, the perineurial fibroblasts regulate cell sorting via the ephrin-B/EphB2 signaling pathway between SCs and fibroblasts, further guiding the axonal regrowth through wounds5. Peripheral nerve fibroblasts secrete tenascin-C protein and enhance the migration of SCs during nerve regeneration through &#946;1-integrin signaling pathway7. However, the SCs and fibroblasts used in the above studies were derived from the sciatic nerve, which includes both sensory and motor nerves.
In the peripheral nervous system, the sensory nerves (afferent nerves) conduct sensory signaling from the receptors to the central nervous system (CNS), while the motor nerves (efferent nerves) conduct signals from the CNS to the muscles. Previous studies have indicated that SCs express distinct motor and sensory phenotypes and secrete neurotrophic factors to support peripheral nerve regeneration8,9. According to a recent study, fibroblasts also express different motor and sensory phenotypes and affect the migration of SCs10. Thus, the exploration of differences between motor and sensory nerve fibroblasts/SCs allows us to study the complicated underlying molecular mechanisms of peripheral nerve specific regeneration.
At present, there are many ways to purify SCs and fibroblasts, including the application of antimitotic agents, antibody-mediated cytolysis11,12, sequential immunopanning13 and laminin substratum14. However, all the above methods remove fibroblasts and preserve only the SCs. Highly purified SCs and fibroblasts can be obtained by flow cytometry sorting technology15, but it is a time-consuming and costly technique. Hence, in this study, a simple differential digestion and differential adherence method for purifying and isolating sensory and motor nerve fibroblasts and SCs was developed in order to obtain a large number of fibroblasts and SCs more rapidly.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Alexa Fluor 594 Goat Anti-Mouse IgG(H+L)</td>
			<td>Life Technologies</td>
			<td>A11005</td>
			<td>Dilution: 1:400</td>
		</tr>
		<tr>
			<td>CoraLite488-conjugated Affinipure Goat Anti-Mouse IgG(H+L)</td>
			<td>Proteintech</td>
			<td>SA00013-1</td>
			<td>Dilution: 1:400</td>
		</tr>
		<tr>
			<td>Confocal laser scanning microscope</td>
			<td>Leica Microsystems</td>
			<td>TCS SP5</td>
			<td></td>
		</tr>
		<tr>
			<td>Cell Quest software</td>
			<td>Becton Dickinson Biosciences</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>D-Hank&#39;s balanced salt solution</td>
			<td>Gibco</td>
			<td>14170112</td>
			<td></td>
		</tr>
		<tr>
			<td>DMEM</td>
			<td>Corning</td>
			<td>10-013-CV</td>
			<td></td>
		</tr>
		<tr>
			<td>Dissecting microscope</td>
			<td>Olympus</td>
			<td>SZ2-ILST</td>
			<td></td>
		</tr>
		<tr>
			<td>Fetal bovine serum (FBS)</td>
			<td>Gibco</td>
			<td>10099-141C</td>
			<td></td>
		</tr>
		<tr>
			<td>Forskolin</td>
			<td>Sigma</td>
			<td>F6886-10MG</td>
			<td></td>
		</tr>
		<tr>
			<td>Fluoroshield Mounting Medium</td>
			<td>Abcam</td>
			<td>ab104135</td>
			<td></td>
		</tr>
		<tr>
			<td>Fixation medium/Permeabilization medium</td>
			<td>Multi Sciences (LIANKE) Biotech, Co., LTD</td>
			<td>GAS005</td>
			<td></td>
		</tr>
		<tr>
			<td>Flow cytometry</td>
			<td>Becton Dickinson Biosciences</td>
			<td>FACS Calibur</td>
			<td></td>
		</tr>
		<tr>
			<td>Mouse IgG1 kappa [MOPC-21] (FITC) - Isotype Control</td>
			<td>Abcam</td>
			<td>ab106163</td>
			<td>Dilution: 1:400</td>
		</tr>
		<tr>
			<td>Mouse monoclonal anti-CD90 antibody</td>
			<td>Abcam</td>
			<td>ab225</td>
			<td>Dilution: 1:1000 for ICC, 0.1 &#181;g for 106 cells for Flow Cyt</td>
		</tr>
		<tr>
			<td>Mouse anti-S100 antibody</td>
			<td>Abcam</td>
			<td>ab212816</td>
			<td>Dilution: 1:400</td>
		</tr>
		<tr>
			<td>Polylysine (PLL)</td>
			<td>Sigma</td>
			<td>P4832</td>
			<td></td>
		</tr>
		<tr>
			<td>Recombinant Human NRG1-beta 1/HRG1-beta 1 EGF Domain Protein</td>
			<td>R&#38;D Systems</td>
			<td>396-HB-050</td>
			<td></td>
		</tr>
		<tr>
			<td>0.25% (w/v) trypsin</td>
			<td>Gibco</td>
			<td>25200-072</td>
			<td></td>
		</tr>
	</tbody>
</table>

purification of fibroblasts and schwann cells from sensory and motor nerves in vitro

The principal cells in the peripheral nervous system are the Schwann cells (SCs) and the fibroblasts. Both these cells distinctly express the sensory and motor phenotypes involved in different patterns of neurotrophic factor gene expression and other biological processes, affecting nerve regeneration. The present study has established a protocol to obtain highly purified rat sensory and motor SCs and fibroblasts more rapidly. The ventral root (motor nerve) and the dorsal root (sensory nerve) of neonatal rats (7-days-old) were dissociated and the cells were cultured for 4-5 days, followed by isolation of sensory and motor fibroblasts and SCs by combining differential digestion and differential adherence methods sequentially. The results of immunocytochemistry and flow cytometry analyses showed that the purity of the sensory and motor SCs and fibroblasts were &#62;90%. This protocol can be used to obtain a large number of sensory and motor fibroblasts/SCs more rapidly, contributing to the exploration of sensory and motor nerve regeneration.

Light microscopic observation 
The SCs and fibroblasts are the two main cell populations obtained in the primary cell culture from nerve tissues. After inoculation for 1 h, most of the cells adhered to the bottom of the dish, and the cell morphology changed from round to oval. After culturing for 24 h, the SCs exhibited a bipolar or tripolar morphology and the length of these ranged from 100 to 200 &#181;m. After 48 h, aggregation and proliferation of cells occurred,...

Watch this Scientific Journal Video about Purification of Fibroblasts and Schwann Cells from Sensory and Motor Nerves in Vitro at JoVE.com

Purification of Fibroblasts and Schwann Cells from Sensory and Motor Nerves in Vitro

Here, we present a method to purify fibroblasts and Schwann cells from sensory and motor nerves in vitro.

The principal cells in the peripheral nervous system are the Schwann cells (SCs) and the fibroblasts. Both these cells distinctly express the sensory and ...

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