eoe sub articles

EoE Sub Articles

All procedures involving sample collection have been performed in accordance with the institute&#39;s IRB guidelines.
1. Isolation of Schwann cells (SCs) and fibroblasts from the dermis
<ol>
	<li>Pre-coat T25 flasks with poly-L-lysine (PLL, 0.01 &#181;g/&#181;L) using 5 mL of 1x DPBS. Place the pre-coated flasks at 37 &#176;C for 3 h. Wash the PLL coating matrix twice using 1x DPBS (5 mL). 
	NOTE: T25 flasks can be prepared ahead of time.</li>
	<li>Rinse the isolated pieces of the dermis with 5 mL of DMEM basal medium.</li>
	<li>Mince the dermis into small pieces with scissors or a scalpel.</li>
	<li>Digest the minced dermis with 5 mL of collagenase (2 mg/mL in DMEM basal medium) at 37 &#176;C for 2.5 h. Gently triturate the minced dermis with a pipette tip every 30 min until the dermis completely dissociates.</li>
	<li>Filter the cell suspension with a 70 &#181;M cell strainer. It is necessary to apply mechanical force using a 1 mL syringe to fully filter the suspension.</li>
	<li>Dilute the filtered cell suspension with 5 mL of complete DMEM medium (DMEM basal medium + 5% FBS + 1x of antibiotic) to stop the enzymatic activity of collagenase.</li>
	<li>Centrifuge the cell suspension at 870 x g for 5 min at RT to pellet the cells.</li>
	<li>From this cell pellet, both fibroblasts and SCs will be obtained. Resuspend the cell pellet in 2 mL of DMEM complete medium to divide the cells (1 mL cell suspension/tube) and centrifuge at 870 x g for 5 min at RT.</li>
	<li>Aspirate the supernatant. Resuspend the cell pellet in 5 mL of fresh DMEM complete medium.</li>
	<li>Quantify the cell number and viability. 
	NOTE: Here, a specialized cell sampling and staining device (Table of Materials) was used to quantify the cell number and viability following the manufacturer&#39;s instructions.</li>
	<li>Seed the pre-coated T25 flasks with 5 mL of resuspended cells at a density 4 x 103 cells/mL. Incubate the flask at 37 &#176;C in the presence of 5% CO2 overnight (~12-16 h incubation).</li>
	<li>After 16 h, confirm cell adhesion by microscopy (Table of Materials) at 10x magnification.</li>
	<li>Remove the non-adherent cells and wash the flask 3x with 5 mL of 1x DPBS.</li>
	<li>Add 5 mL of 10 &#181;M cytosine arabinoside (antimitotic agent, kills fibroblasts) in DMEM complete medium. Incubate the flask at 37 &#176;C in the presence of 5% CO2 for 24 h.</li>
	<li>Aspirate the cytosine arabinoside-containing medium from the flask. Rinse the flask 3x with 5 mL of 1x DPBS.</li>
	<li>Refill the culture flask with 5 mL of SCs complete culture medium (Table of Materials) and incubate at 37 &#176;C in the presence of 5% CO2 for 48 h. Refresh SC complete culture medium every other day until SCs reach 80% confluence.</li>
</ol>

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>0.22 &#181;M sterile filters (Millex-GP Syringe Filter Unit,polyethersulfone)</td>
			<td>MilliporeSigma</td>
			<td>SLGPR33RS</td>
			<td></td>
		</tr>
		<tr>
			<td>70 &#181;M cell strainers</td>
			<td>CELLTREAT</td>
			<td>229483</td>
			<td></td>
		</tr>
		<tr>
			<td>100 &#181;M cell strainers</td>
			<td>CELLTREAT</td>
			<td>229485</td>
			<td></td>
		</tr>
		<tr>
			<td>1 mL disposable syringes</td>
			<td>BD Luer-Lok</td>
			<td>BD-309659</td>
			<td></td>
		</tr>
		<tr>
			<td>5 mL disposable syringes (Syringe sterile, single use)</td>
			<td>BD Luer-Lok</td>
			<td>BD309646</td>
			<td></td>
		</tr>
		<tr>
			<td>10 mL disposable syringes</td>
			<td>BD Luer-Lok</td>
			<td>BD305462</td>
			<td></td>
		</tr>
		<tr>
			<td>1% TritonX-100</td>
			<td>Sigma</td>
			<td>X100-1L</td>
			<td>Prepared at the time of use.</td>
		</tr>
		<tr>
			<td>4% paraformaldehyde solution</td>
			<td>ThermoFisher Scientific</td>
			<td>J19943.K2</td>
			<td>Ready to use and store at 4 &#176;C.</td>
		</tr>
		<tr>
			<td>5% BSA</td>
			<td>Sigma</td>
			<td>A7906-100G</td>
			<td>Prepared at the time of use.</td>
		</tr>
		<tr>
			<td>70% ethanol</td>
			<td>Pharmco</td>
			<td>111000200</td>
			<td></td>
		</tr>
		<tr>
			<td>Antibiotic</td>
			<td>ScienCell Research</td>
			<td>503</td>
			<td></td>
		</tr>
		<tr>
			<td>Chemometec Vial1-Cassette</td>
			<td>Fisher Scientific</td>
			<td>NC1420193</td>
			<td></td>
		</tr>
		<tr>
			<td>Collagenase</td>
			<td>Gibco</td>
			<td>17018-029</td>
			<td></td>
		</tr>
		<tr>
			<td>Coverslip</td>
			<td>Fisherbrand</td>
			<td>12544D 22*50-1.5</td>
			<td></td>
		</tr>
		<tr>
			<td>Dispase I</td>
			<td>Sigma-Aldrich</td>
			<td>D46693</td>
			<td></td>
		</tr>
		<tr>
			<td>DMEM basal medium</td>
			<td>ScienCell Research</td>
			<td>9221</td>
			<td></td>
		</tr>
		<tr>
			<td>Dulbecco&#39;s phosphate-buffered saline free from calcium and magnesium ions (DPBS)</td>
			<td>Corning</td>
			<td>21-031-CV)</td>
			<td></td>
		</tr>
		<tr>
			<td>Nunc 15 mL Conical Sterile Polypropylene Centrifuge Tubes</td>
			<td>ThermoFisher Scientific</td>
			<td>339651</td>
			<td></td>
		</tr>
		<tr>
			<td>Nunc 50 mL Conical Sterile Polypropylene Centrifuge Tubes</td>
			<td>ThermoFisher Scientific</td>
			<td>339653</td>
			<td></td>
		</tr>
		<tr>
			<td>1.5 mL micro-centrifuge tubes</td>
			<td>Fisherbrand</td>
			<td>02-681-5</td>
			<td></td>
		</tr>
		<tr>
			<td>Fetal bovine serum (FBS)</td>
			<td>ThermoFisher Scientific</td>
			<td>10082147</td>
			<td></td>
		</tr>
		<tr>
			<td>Hanks&#39; Buffered Saline Solution (HBSS buffer)</td>
			<td>Lonza</td>
			<td>CC-5022</td>
			<td></td>
		</tr>
		<tr>
			<td>Poly-L-Lysisne (PLL)</td>
			<td>ScienCell Research</td>
			<td>32503</td>
			<td></td>
		</tr>
		<tr>
			<td>Schwann cell culture medium</td>
			<td>ScienCell Research</td>
			<td>1701</td>
			<td></td>
		</tr>
		<tr>
			<td>Precision tweezers DUMONT straight with extra fine tips Dumostar, 5</td>
			<td>ROTH</td>
			<td>LH75.1</td>
			<td>Sterilize with 70% alcohol before use.</td>
		</tr>
		<tr>
			<td>IRIS Scissors, sharp/sharp. Length 4&#8211;3/8&#34;(111mm)</td>
			<td>Codman</td>
			<td>54-6500</td>
			<td>Sterilize with 70% alcohol before use.</td>
		</tr>
		<tr>
			<td>Sterilized surgical - sharp blade (Duro Edge Economy Single Edge Blades)</td>
			<td>Razor blade company</td>
			<td>94-0120</td>
			<td>Sterilize with 70% alcohol before use.</td>
		</tr>
		<tr>
			<td>T25 culture flask</td>
			<td>Corning</td>
			<td>353109</td>
			<td></td>
		</tr>
		<tr>
			<td>Trypsin neutralization buffer (TNS)</td>
			<td>Lonza</td>
			<td>CC-5002</td>
			<td></td>
		</tr>
		<tr>
			<td>Trypsin/EDTA</td>
			<td>Lonza</td>
			<td>CC-5012</td>
			<td></td>
		</tr>
		<tr>
			<td>Inverted microscope</td>
			<td>ZEISS</td>
			<td>Primovert</td>
			<td>For visualizing/observing cell attachment or detachment.</td>
		</tr>
	</tbody>
</table>

isolation and culture of primary schwann cells from a human dermis

Source: Jagadeeshaprasad, M. G., et al. <a href="https://app-jove-com.bdigitaluss.remotexs.co/v/63776">Isolation, Culture, and Characterization of Primary Schwann Cells, Keratinocytes, and Fibroblasts from Human Foreskin.</a> J. Vis. Exp. (2022)
This video demonstrates a protocol for isolating and culturing Schwann cells from human dermis tissues. The human dermis contains various cell types, including fibroblasts and Schwann cells. After isolation, the cells are treated with an antimitotic agent to eliminate proliferating fibroblasts, resulting in a pure culture of Schwann cells.

Isolation and Culture of Primary Schwann Cells from a Human Dermis

All procedures involving sample collection have been performed in accordance with the institute&#39;s IRB guidelines.
1. Isolation of Schwann cells (SCs) ...

Take pieces of isolated human dermis containing various cell types, including fibroblasts, Schwann cells, and immune cells, embedded within a collagen matrix.
Mince the tissue into small fragments.
Add collagenase, a proteolytic enzyme, to digest the tissue&#39;s collagen fibers, loosening the cells.
Mechanically dissociate the tissue, obtaining a cell suspension.
Pass the cells through a cell strainer, removing the cell aggregates and tissue debris.
Add media containing serum to the cell suspension to stop the collagenase activity.
Centrifuge and discard the supernatant containing collagenase.
Resuspend the cells in media and plate them in a poly-L-lysine-coated culture flask.
Incubate for the cells to adhere to the coated surface.
Remove the media containing non-adherent cells. Wash with buffer.
Incubate with an antimitotic agent to eliminate rapidly dividing cells, like fibroblasts.
Remove media. Wash with buffer to remove any remaining antimitotic agents.&#160;
Add Schwann cell-specific culture media and incubate, facilitating the growth of Schwann cells.

isolation-and-culture-of-primary-schwann-cells-from-a-human-dermis

Nanyang Technological University

Research

JoVE Encyclopedia of Experiments

Neuroscience

Neuronal Culture Techniques

Advanced Neuronal Models

54 次观看. 来源:Jagadeeshaprasad， M. G.， et al.人包皮原代雪旺细胞、角质形成细胞和成纤维细胞的分离、培养和表征。J. Vis. Exp.（2022 年） 该视频演示了从人真皮组织中分离和培养雪旺细胞的方案。人类真皮包含各种细胞类型，包括成纤维细胞和雪旺细胞。分离后，用抗有丝分裂剂处理细胞以消除增殖的成纤维细胞，从而产生雪旺细胞的纯培养物。 

视频: 从人真皮中分离和培养原代雪旺细胞 - 概念

Hypoxic Preconditioning of Marrow-derived Progenitor Cells As a Source for the Generation of Mature Schwann Cells

This manuscript describes a means to enrich for neural progenitors from the marrow stromal cell (MSC) population and thereafter to direct them to the mature Schwann cell fate. We subjected rat and human MSCs to transient hypoxic conditions (1% oxygen for 16 h) followed by expansion as neurospheres upon low-attachment substratum with epidermal growth factor (EGF)/basic fibroblast growth factor (bFGF) supplementation. Neurospheres were seeded onto poly-D-lysine/laminin-coated tissue culture plastic and cultured in a gliogenic cocktail containing &#946;-Heregulin, bFGF, and platelet-derived growth factor (PDGF) to generate Schwann cell-like cells (SCLCs). SCLCs were directed to fate commitment via coculture for 2 weeks with purified dorsal root ganglia (DRG) neurons obtained from E14-15 pregnant Sprague Dawley rats. Mature Schwann cells demonstrate persistence in S100&#946;/p75 expression and can form myelin segments. Cells generated in this manner have potential applications in autologous cell transplantation following spinal cord injury, as well as in disease modeling.

Marrow stromal cells (MSCs) with neural potential exist within the bone marrow. Our protocol enriches this population of cells via hypoxic preconditioning and thereafter directs them to become mature Schwann cells.

骨髓衍生祖细胞的低氧预处理作为成熟雪旺细胞产生的来源

This manuscript describes a means to enrich for neural progenitors from the marrow stromal cell (MSC) population and thereafter to direct them to the ...

科研

JoVE Journal

发育生物学

In Vivo Gene Transfer to Schwann Cells in the Rodent Sciatic Nerve by Electroporation

The formation of the myelin sheath by Schwann cells (SCs) is essential for rapid conduction of nerve impulses along axons in the peripheral nervous system. SC-selective genetic manipulation in living animals is a powerful technique for studying the molecular and cellular mechanisms of SC myelination and demyelination in vivo. While knockout/knockin and transgenic mice are powerful tools for studying SC biology, these methods are costly and time consuming. Viral vector-mediated transgene introduction into the sciatic nerve is a simpler and less laborious method. However, viral methods have limitations, such as toxicity, transgene size constraints, and infectivity restricted to certain developmental stages. Here, we describe a new method that allows selective transfection of myelinating SCs in the rodent sciatic nerve using electroporation. By applying electric pulses to the sciatic nerve at the site of plasmid DNA injection, genes of interest can be easily silenced or overexpressed in SCs in both neonatal and more mature animals. Furthermore, this in vivo electroporation method allows for highly efficient simultaneous expression of multiple transgenes. Our novel technique should enable researchers to efficiently manipulate SC gene expression, and facilitate studies on SC development and function.

In Vivo Gene Transfer to Schwann Cells in the Rodent Sciatic Nerve by Electroporation

Here, we present an in vivo technique for gene transfer to Schwann cells (SCs) in the rodent sciatic nerve. This simple technique is useful for investigating signaling mechanisms involved in the development and maintenance of myelinating SCs.

体内基因转移到雪旺细胞在啮齿动物坐骨神经电穿孔

The formation of the myelin sheath by Schwann cells (SCs) is essential for rapid conduction of nerve impulses along axons in the peripheral nervous ...

神经科学

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.

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

从体外感觉和运动神经中纯化成纤维细胞和施万细胞

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

Isolation and Culture of Primary Schwann Cells from a Human Dermis

成績單

Isolation and Culture of Primary Schwann Cells from a Human Dermis