Name: differentiation and characterization of neural progenitors and neurons from mouse embryonic stem cells
Uploaded: 2020-05-15T15:00:00
Description: Watch this Scientific Journal Video about Differentiation and Characterization of Neural Progenitors and Neurons from Mouse Embryonic Stem Cells at JoVE.com

Este trabajo fue apoyado por una subvención del NIH (1R35GM133496-01) a Z. Gao. Nos gustaría agradecer al Dr. Ryan Hobbs por la asistencia en la sección. Agradecemos las instalaciones centrales de Penn State College of Medicine, incluidas las Ciencias del Genoma y la Bioinformática, las Imágenes Avanzadas de Microscopía de Luz y la Citometría de Flujo. También agradecemos a la Dra. Yuka Imamura por la asistencia en el análisis de ARN-seq.

1. Cultura mESC
<ol><li>Cubra una placa tratada con cultivo de tejidos de 10 cm con gelatina al 0,1% y deje que la gelatina se fije durante al menos 15-30 minutos antes de aspirarla.</li>
	<li>Semilla γ fibroblastos embrionarios de ratón irradiados (MEF) un día antes de cultivar las mESC en el medio mESC precalentado (medio Eagle modificado (DMEM) de Dulbecco con suero fetal bovino (FBS) al 15%), aminoácidos no esenciales, β-mercaptoetanol, L-glutamina, penicilina/estreptomicina, piruvato de sodio, LIF, PD0325901 ...

<ol>
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R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Advances+and+challenges+in+stem+cell+culture.">Advances and challenges in stem cell culture.</a> Colloids and Surfaces B: Biointerfaces. 159, 62-77 (2017).</li><li>Bibel, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Differentiation+of+mouse+embryonic+stem+cells+into+a+defined+neuronal+lineage.">Differentiation of mouse embryonic stem cells into a defined neuronal lineage.</a> Nature Neuroscience. 7 (9), 1003-1009 (2004).</li><li>Wang, Q., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=WDR68+is+essential+for+the+transcriptional+activation+of+the+PRC1-AUTS2+complex+and+neuronal+differentiation+of+mouse+embryonic+stem+cells.">WDR68 is essential for the transcriptional activation of the PRC1-AUTS2 complex and neuronal differentiation of mouse embryonic stem cells.</a> Stem Cell Research. 33, 206-214 (2018).</li><li>Ying, Q. L., Stavridis, M., Griffiths, D., Li, M., Smith, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Conversion+of+embryonic+stem+cells+into+neuroectodermal+precursors+in+adherent+monoculture.">Conversion of embryonic stem cells into neuroectodermal precursors in adherent monoculture.</a> Nature Biotechnology. 21 (2), 183-186 (2003).</li><li>Visan, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neural+differentiation+of+mouse+embryonic+stem+cells+as+a+tool+to+assess+developmental+neurotoxicity+in+vitro.">Neural differentiation of mouse embryonic stem cells as a tool to assess developmental neurotoxicity in vitro.</a> NeuroToxicology. 33 (5), 1135-1146 (2012).</li><li>Fraichard, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vitro+differentiation+of+embryonic+stem+cells+into+glial+cells+and+functional+neurons.">In vitro differentiation of embryonic stem cells into glial cells and functional neurons.</a> Journal of Cell Science. 108 (10), 3181-3188 (1995).</li><li>Stavridis, M. 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El método para la diferenciación neuronal de las células madre embrionarias de ratón se ha establecido durante décadas y los investigadores han seguido modificando los protocolos anteriores o creando otros nuevos para diversos fines7,10,11. Utilizamos una serie de ensayos para analizar exhaustivamente la eficiencia y el progreso de las etapas de diferenciación de las mESCs a las neuronas, que pueden usarse en el análisis ...

Desde su primera derivación de la masa celular interna de los blastocistos de ratón en desarrollo1,2,las células madre embrionarias de ratón (mESC) se han utilizado como herramientas poderosas para estudiar la autorrenovación y diferenciación de las células madre3. Además, el estudio de la diferenciación mESC conduce a una tremenda comprensión de los mecanismos moleculares que pueden mejorar la eficiencia y la seguridad en la terapia basada en células madre en el tratamiento de enfermedades como los trastornos neurodegenerativos4. En comparación con los modelos animales, este sistema in vitro proporciona muchas ventajas, incluida la simplicidad en la práctica y la evaluación, el bajo costo en el mantenimiento de las líneas celulares en contraste con los animales y la relativa facilidad en las manipulaciones genéticas. Sin embargo, la eficiencia y la calidad de los tipos de células diferenciadas a menudo se ven afectadas por diferentes líneas de mESCs, así como por los métodos de diferenciación5,6. Además, los ensayos tradicionales para evaluar la eficiencia de la diferenciación se basan en el examen cualitativo de genes marcadores seleccionados que carecen de robustez y, por lo tanto, no logran comprender los cambios globales en la expresión génica.
Aquí pretendemos utilizar una batería de ensayos para la evaluación sistemática de la diferenciación neuronal. Utilizando tanto análisis tradicionales in vitro en marcadores seleccionados como ARN-seq, establecemos una plataforma para medir la eficiencia de diferenciación, así como los cambios transcriptómicos durante este proceso. Basándonos en un protocolo previamente establecido7,generamos cuerpos embrioides (EB) a través de la técnica de gota colgante, seguida de la inducción utilizando cantidad suprafisiológica de ácido retinoico (AR) para generar células progenitoras neurales (NPC), que posteriormente se diferenciaron a neuronas con medio de inducción neural. Para examinar la eficiencia de la diferenciación, además de los ensayos tradicionales de RT-qPCR e inmunofluorescencia (IF), se realizó citometría de flujo y ARN-seq. Estos análisis proporcionan una medición exhaustiva de la progresión de la diferenciación específica de la etapa.

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	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">0.05% Trypsin + 0.53mM EDTA 1X</td>
			<td style="width:148px;">Corning</td>
			<td style="width:127px;">25-052-CV</td>
			<td style="width:255px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">0.1% Gelatin</td>
			<td style="width:148px;">Sigma</td>
			<td style="width:127px;">G1890-100G</td>
			<td>Prepared in de-ionized water</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">16% Paraformaldehyde</td>
			<td style="width:148px;">Thermo Scientific</td>
			<td style="width:127px;">28908</td>
			<td>Diluted in 1X PBS</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">40-&#956;m cell strainer</td>
			<td style="width:148px;">Falcon</td>
			<td style="width:127px;">352340</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">Albumax</td>
			<td style="width:148px;">Thermo Fisher Scientific</td>
			<td style="width:127px;">11020021</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">AlexaFluor 488 goat anti-mouse IgG (H+L)</td>
			<td style="width:148px;">Invitrogen</td>
			<td style="width:127px;">A11001</td>
			<td>Antibody was diluted at 1:500 for IF</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Alkaline Phosphatase Staining Kit II</td>
			<td style="width:148px;">Stemgent</td>
			<td style="width:127px;">00-0055</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">AzuraQuant Green Fast qPCR Mix LoRox</td>
			<td style="width:148px;">Azura Genomics</td>
			<td style="width:127px;">AZ-2105</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">B27 supplement</td>
			<td style="width:148px;">Thermo Fisher Scientific</td>
			<td style="width:127px;">17504044</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">BD FACSCanto</td>
			<td style="width:148px;">BD</td>
			<td style="width:127px;">657338</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">bFGF</td>
			<td style="width:148px;">Sigma</td>
			<td style="width:127px;">11123149001</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">BioAnalyzer High Sensitivity DNA Kit</td>
			<td style="width:148px;">Agilent</td>
			<td style="width:127px;">5067-4626</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Chir99021</td>
			<td style="width:148px;">Cayman Chemicals</td>
			<td style="width:127px;">13122</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Chloroform</td>
			<td style="width:148px;">C298-500</td>
			<td style="width:127px;">Fisher Chemical</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">DAPI</td>
			<td style="width:148px;">Invitrogen</td>
			<td style="width:127px;">R37606</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">DMEM</td>
			<td style="width:148px;">Corning</td>
			<td style="width:127px;">10-017-CM</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">DMEM/F12 medium</td>
			<td style="width:148px;">Thermo Fisher Scientific</td>
			<td style="width:127px;">11320033</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">EB buffer</td>
			<td style="width:148px;">Qiagen</td>
			<td style="width:127px;">19086</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Ethanol</td>
			<td style="width:148px;">111000200</td>
			<td style="width:127px;">Pharmco</td>
			<td>Diluted in de-ionized water</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Fetal bovine serum</td>
			<td style="width:148px;">Atlanta Biologicals</td>
			<td style="width:127px;">S10250</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">Fisherbrand Superfrost Plus Microscope Slides</td>
			<td style="width:148px;">Fisher Scientific</td>
			<td style="width:127px;">12-550-15</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">HiSeq 2500 Sequencing System</td>
			<td style="width:148px;">Illumina</td>
			<td style="width:127px;">SY-401-2501</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">Isopropanol</td>
			<td style="width:148px;">BDH1133-4LG</td>
			<td style="width:127px;">BDH VWR Analytical</td>
			<td>Diluted in de-ionized water</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">L-glutamine</td>
			<td style="width:148px;">Thermo Fisher Scientific</td>
			<td style="width:127px;">25030024</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">LIF</td>
			<td style="width:148px;">N/A</td>
			<td style="width:127px;">N/A</td>
			<td>Collected from MEF supernatant</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">m18srRNA primers</td>
			<td style="width:148px;">IDTDNA</td>
			<td style="width:127px;">N/A</td>
			<td style="width:255px;">5&#39;-GCAATTATTCCCCATGAACG-3&#39; 
			5&#39;-GGCCTCACTAAACCATCCAA-3&#39;</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">MEM Non-essential amino acids</td>
			<td style="width:148px;">Corning</td>
			<td style="width:127px;">25-025-Cl</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">mNanog primers</td>
			<td style="width:148px;">IDTDNA</td>
			<td style="width:127px;">N/A</td>
			<td style="width:255px;">5&#39;-AGGCTTTGGAGACAGTGAGGTG-3&#39; 
			5&#39;-TGGGTAAGGGTGTTCAAGCACT-3&#39;</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;">mNes primers</td>
			<td style="width:148px;">IDTDNA</td>
			<td style="width:127px;">N/A</td>
			<td style="width:255px;">5&#39;-AGTGCCCAGTTCTAGTGGTGTCC-3&#39; 
			5&#39;-CCTCTAAAATAGAGTGGTGAGGGTTG-3&#39;</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;">mNeuroD1 primers</td>
			<td style="width:148px;">IDTDNA</td>
			<td style="width:127px;">N/A</td>
			<td style="width:255px;">5&#39;-CGAGTCATGAGTGCCCAGCTTA-3&#39; 
			5&#39;-CCGGGAATAGTGAAACTGACGTG-3&#39;</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">mOct4 primers</td>
			<td style="width:148px;">IDTDNA</td>
			<td style="width:127px;">N/A</td>
			<td style="width:255px;">5&#39;-AGATCACTCACATCGCCAATCA-3&#39; 
			5&#39;-CGCCGGTTACAGAACCATACTC-3&#39;</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">mPax6 primers</td>
			<td style="width:148px;">IDTDNA</td>
			<td style="width:127px;">N/A</td>
			<td style="width:255px;">5&#39;-CTTGGGAAATCCGAGACAGA-3&#39; 
			5&#39;-CTAGCCAGGTTGCGAAGAAC-3&#39;</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">N2 supplement</td>
			<td style="width:148px;">Thermo Fisher Scientific</td>
			<td style="width:127px;">17502048</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Nestin primary antibody</td>
			<td style="width:148px;">Millipore</td>
			<td style="width:127px;">MAB5326</td>
			<td>Antibody was diluted at 1:200 for IF</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">Neural basal</td>
			<td style="width:148px;">Thermo Fisher Scientific</td>
			<td style="width:127px;">21103049</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Neurofilament primary antibody</td>
			<td style="width:148px;">DSHB</td>
			<td style="width:127px;">2H3</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">NEXTflex Illumina Rapid Directional RNA-Seq Library Prep Kit</td>
			<td style="width:148px;">BioO Scientific</td>
			<td style="width:127px;">NOVA-5138-07</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">PD0325901</td>
			<td style="width:148px;">Cayman Chemicals</td>
			<td style="width:127px;">13034</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Penicillin/streptomycin</td>
			<td style="width:148px;">Corning</td>
			<td style="width:127px;">30-002-Cl</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Phosphate-buffered saline (PBS)</td>
			<td style="width:148px;">N/A</td>
			<td style="width:127px;">N/A</td>
			<td>Prepared in de-ionized water</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">- Potassium chloride</td>
			<td style="width:148px;">P217-500G</td>
			<td style="width:127px;">VWR</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">- Potassium phosphate monobasic anhydrous</td>
			<td style="width:148px;">0781-500G</td>
			<td style="width:127px;">VWR</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">- Sodium chloride</td>
			<td style="width:148px;">BP358-10</td>
			<td style="width:127px;">Fisher Bioreagents</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:276px;">- Sodium phosphate, dibasic, heptahydrate</td>
			<td style="width:148px;">SX0715-1</td>
			<td style="width:127px;">Milipore</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Random hexamer primer</td>
			<td style="width:148px;">Thermo Scientific</td>
			<td style="width:127px;">SO142</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Retinoic acid</td>
			<td style="width:148px;">Sigma</td>
			<td style="width:127px;">R2625</td>
			<td>Prepared in DMSO</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Sodium pyruvate</td>
			<td style="width:148px;">Corning</td>
			<td style="width:127px;">25-000-Cl</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Sucrose</td>
			<td style="width:148px;">Sigma</td>
			<td style="width:127px;">84097</td>
			<td>Diluted in 1X PBS</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">SuperScript III Reverse Transcriptase</td>
			<td style="width:148px;">Invitrogen</td>
			<td style="width:127px;">18064022</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">Tissue-Tek O.C.T. compound</td>
			<td style="width:148px;">Sakura</td>
			<td style="width:127px;">4583</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">TriPure Isolation Reagent</td>
			<td style="width:148px;">Sigma-Aldrich</td>
			<td style="width:127px;">11667165001</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">TruSeq Rapid</td>
			<td style="width:148px;">Illumina</td>
			<td style="width:127px;">20020616</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:276px;">&#946;-mercaptoethanol</td>
			<td style="width:148px;">Fisher BioReagents</td>
			<td style="width:127px;">BP176-100</td>
			<td></td>
		</tr>
	</tbody>
</table>

differentiation and characterization of neural progenitors and neurons from mouse embryonic stem cells

Describimos el procedimiento paso a paso para cultivar y diferenciar las células madre embrionarias de ratón en linajes neuronales, seguido de una serie de ensayos para caracterizar las células diferenciadas. Las células madre embrionarias de ratón E14 se utilizaron para formar cuerpos embrionarios a través del método de la gota colgante, y luego se indujeron a diferenciarse en células progenitoras neurales por ácido retinoico, y finalmente se diferenciaron en neuronas. Los experimentos cuantitativos de reacción en cadena de la polimerasa de transcripción inversa (RT-qPCR) e inmunofluorescencia revelaron que los progenitores neurales y las neuronas exhiben marcadores correspondientes (nestina para los progenitores neurales y neurofilamento para las neuronas) en los días 8 y 12 después de la diferenciación, respectivamente. Los experimentos de citometría de flujo en una línea E14 que expresan un informador de GFP impulsado por el promotor Sox1 mostraron que aproximadamente el 60% de las células en el día 8 son GFP positivas, lo que indica la diferenciación exitosa de las células progenitoras neurales en esta etapa. Finalmente, se utilizó el análisis RNA-seq para perfilar los cambios transcriptómicos globales. Estos métodos son útiles para analizar la participación de genes y vías específicas en la regulación de la transición de la identidad celular durante la diferenciación neuronal.

Como representación de nuestro método, realizamos un experimento de EB, NPC y diferenciación neuronal en células E14. Las células E14 se cultivaron en MEFs irradiados γ(Figura 1A)hasta que la población de MEF γ-irradiada se diluyó. Confirmamos la pluripotencia de las células E14 mediante la tinción de fosfatasa alcalina (AP)(Figura 1B)y posteriormente RT-qPCR (ver más abajo) para los marcadores Nanog y Oct4. Las células E14 libres ...

Watch this Scientific Journal Video about Differentiation and Characterization of Neural Progenitors and Neurons from Mouse Embryonic Stem Cells at JoVE.com

Differentiation and Characterization of Neural Progenitors and Neurons from Mouse Embryonic Stem Cells

Describimos el procedimiento para la diferenciación in vitro de células madre embrionarias de ratón en células neuronales utilizando el método de la gota colgante. Además, realizamos un análisis fenotípico exhaustivo a través de RT-qPCR, inmunofluorescencia, ARN-seq y citometría de flujo.

Diferenciación y caracterización de progenitores neurales y neuronas a partir de células madre embrionarias de ratón

We describe the step-by-step procedure for culturing and differentiating mouse embryonic stem cells into neuronal lineages, followed by a series of assays ...

In addition to the protocol for mouse embryonic stem cell differentiation into neuron cells, we also show a set of experiments that can comprehensively analyze the differentiation process. These techniques are pertinent to early ectodermal embryonic development, providing researchers with options to analyze neuron cell differentiation. When attempting this procedure, starting with stem cells in optimal condition is essential.Hence it is important that the EBs, MPCs and neurons are cultured in fresh and optimum media. Visual demonstration of this protocol is important, because it contains minute detail that can affect its success and effectiveness, especially the differentiation part. Begin by setting up a hanging drop cell culture.For a 10-centimeter cell culture plate, adjust the concentration to 500 cells per 20-microliters of differentiation medium. Prepare enough cell suspension for 50 20-microliter droplets. Use a micro-pipette or a repeater pipette to place 20-microliter droplets of cell suspension onto the lid of a tissue culture plate, making sure that the droplets aren't too close together, to prevent them from merging.Fill the plate with five to 10-milliliters of PBS and carefully put the lid back on the plate. Incubate the culture in the 37 degrees Celsius incubator. After two days, collect the droplets from the lid, and place them in a 10-centimeter cell culture suspension plate filled with 10-milliliters of differentiation medium, then place the plate on an orbital shaker set to low speed in the incubator.After another two days, centrifuge the cells at 200 times G for three minutes, and remove the supernatant. To induce embryoid body differentiation into neural progenitor cells, re-suspend the cells in differentiation medium with five-micromolar retinoic acid. Incubate the plate for two days, then replace the least half of the medium with fresh medium, by tilting the plate and pipetting it out.Collect the cells two days later by centrifuging them at 200 times G for three minutes, and removing the supernatant. Fix the embryoid bodies and neural progenitor cells with 4%PFA in PBS for 30 minutes at room temperature. Then remove the PFA and wash the cells in PBS for five minutes.Incubate the cells serially in PBS 10, 20 and 30%sucrose solutions, at 25 to 28 degrees Celsius, with each incubation lasting 30 minutes or longer until the cells settle at the bottom of the tube. And use it to transfer the sample to the center of a Cryomold, pipetting out the excess liquid. Carefully add optimum cutting temperature or OCT solution to the mold, without re-suspending the sample, then remove excessive bubbles with a pipette.Placed the mold with the sample on a laboratory mixer at low speed for 15 minutes, which will settle the embryoid bodies and neural progenitor cells to the bottom of the OCT solution. Then quickly freeze the sample by placing the mold in liquid nitrogen. Block OCT sections or culture chambers containing neurons in 10%normal donkey serum, and 0.1%Triton X-100 in PBS for one hour at room temperature.Then incubate the samples in primary antibody, diluted in 5%normal donkey serum, and 0.05%Triton X-100 in PBS, at four degrees Celsius overnight. On the next day, wash samples in PBS with 0.1%Triton X-100 three times for five minutes per wash. Incubate them with secondary antibody, diluted in 5%normal donkey serum, and 0.05%Triton X-100 in PBS, for one hour at room temperature.Repeat the washes in Triton X-100 and PBS, then incubate the sample in one microgram-per-milliliter DAPI. Mount the sample with a cover slip and some mounting medium, allow it to dry, and image it with a fluorescence microscope. To perform neuron differentiation, E14 cells were cultured on gamma-irradiated mouse embryonic fibroblasts until the fibroblast population diluted out.The pluripotency of the E14 cells was confirmed with alkaline phosphatase staining. After differentiation, embryonic bodies had a round shape that continuously increased in size. By day 10, neural progenitor cells differentiating into neurons, had an elongated cell shape.Immunofluorescence experiments were performed on neural progenitor cells at day eight, and on neurons at day 12. Positive staining was observed for nesting in neural progenitor cells, and for neurofilament in neurons. A mouse embryonic stem cell line expressing a Sox1 promoter-driven GFP reporter was differentiated, and flow cytometry was performed on the embryonic stem cells and neural progenitor cells.It was found that 58.7%of total cells at the NPC stage are GFP positive, while 0%are GFP positive at the ESC stage. RNA sequence experiments were performed on E14 embryonic stem cells, embryoid bodies, and neural progenitor cells. The genes in the RNA sequence heat map was sorted based on their expression levels.Gene ontology analysis of the four gene clusters showed that they correspond to distinct cellular functions or pathways. When performing this protocol, EBS should appear as spherical, blackened masses of cells. To ensure that EBS grow with such, change the medium on day one, if the medium starts to become yellowish.The same approach is important for MPC culture, as both EBs and MPCs are in a critical stage of early embryonic development. Other functional genomic assays, such as ChIPseek and chromatin confirmation capture assays from the different stages of neuron differentiation, can be performed to understand the underlying biological processes. Integrating by chemical and functional genomics assays in the neuron differentiation process, allows for researchers to better delineate the molecular mechanisms of early embryonic development.

Research

JoVE Journal

Developmental Biology

Neural Differentiation of Mouse Embryonic Stem Cells in Serum-free Monolayer Culture

Diferenciación neural de células madre embrionarias de ratón en el suero libre de monocapa Cultura

The ability to differentiate mouse embryonic stem cells (ESC) to neural progenitors allows the study of the mechanisms controlling neural specification as ...

Investigación

Biología del Desarrollo

Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues

La regulación epigenética de Cardíaca diferenciación de células madre embrionarias y Tejidos

Specific gene transcription is a key biological process that underlies cell fate decision during embryonic development. The biological process is mediated ...

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells

Dirige la diferenciación de progenitores hematopoyéticos primitivo y definitivo de las células madre Pluripotent humanas

One of the major goals for regenerative medicine is the generation and maintenance of hematopoietic stem cells (HSCs) derived from human pluripotent stem ...

Efficient Differentiation of Pluripotent Stem Cells to NKX6-1+ Pancreatic Progenitors

Efficient Differentiation of Pluripotent Stem Cells to NKX6-1+ Pancreatic Progenitors

La diferenciación eficiente de pluripotentes células madre a NKX6-1<sup&gt; +</sup&gt; Progenitores pancreáticas

Pluripotent stem cells have the ability to self renew and differentiate to multiple lineages, making them an attractive source for the generation of ...

Analysis of Retinoic Acid-induced Neural Differentiation of Mouse Embryonic Stem Cells in Two and Three-dimensional Embryoid Bodies

Análisis de inducida por ácido retinoico Neural diferenciación de células madre embrionarias de ratón en cuerpos embrioides dos y tres dimensiones

Mouse embryonic stem cells (ESCs) isolated from the inner mass of the blastocyst (typically at day E3.5), can be used as in vitro model system for ...

Rapid, Directed Differentiation of Retinal Pigment Epithelial Cells from Human Embryonic or Induced Pluripotent Stem Cells

Diferenciación rápida y dirigida de las células epiteliales del pigmento retiniano de humanos embrionarios o inducidas pluripotenciales células

We describe a robust method to direct the differentiation of pluripotent stem cells into retinal pigment epithelial cells (RPE). The purpose of providing ...

Isolation, Culture, and Differentiation of Bone Marrow Stromal Cells and Osteoclast Progenitors from Mice

Aislamiento, cultivo y diferenciación de células estromales de médula ósea y progenitores de los osteoclastos de los ratones

Bone marrow stromal cells (BMSCs) constitute a cell population routinely used as a representation of mesenchymal stem cells in vitro. They reside within ...

Generation of Induced Neural Stem Cells from Peripheral Mononuclear Cells and Differentiation Toward Dopaminergic Neuron Precursors for Transplantation Studies

Generación de células madre neuronales inducidas a partir de células mononucleares periféricas y diferenciación hacia precursores de neuronas dopaminérgicas para estudios de trasplante

Parkinson&#39;s disease (PD) is caused by degeneration of dopaminergic (DA) neurons at the substantia nigra pars compacta (SNpc) in the ventral ...

Efficient Neural Differentiation using Single-Cell Culture of Human Embryonic Stem Cells

Diferenciación neuronal eficiente utilizando el cultivo monocelular de células madre embrionarias humanas

In vitro differentiation of human embryonic stem cells (hESCs) has transformed the ability to study human development on both biological and molecular ...

Preparation of Small RNA Libraries for Sequencing from Early Mouse Embryos

Preparación de pequeñas bibliotecas de ARN para la secuenciación de embriones de ratón tempranos

MicroRNAs (miRNAs) are important for the complex regulation of cell fate decisions and developmental timing. In vivo studies of the contribution of miRNAs ...