Name: generation of first heart field-like cardiac progenitors and ventricular-like cardiomyocytes from human pluripotent stem cells
Uploaded: 2018-06-19T14:00:00
Description: Watch this Scientific Journal Video about Generation of First Heart Field-like Cardiac Progenitors and Ventricular-like Cardiomyocytes from Human Pluripotent Stem Cells at JoVE.com

We thank members of the Colas lab for helpful discussions and critical reviews of the manuscript. This study was supported by NIH/NIEHS R44ES023521-02 and CIRM DISC2-10110 grants to Dr. Colas.

1. Id1 Virus Preparation and Infection
<ol>
	<li>Generate Id1 overexpressing lentivirus by co-transfecting pCMVDR8.74, pMD2.G, and pCDH-EF1-Id1-PGK-PuroR (Addgene: plasmid #107735) into HEK293T cells. Collect viral particles, filtrate, purify from the supernatant, and store at -80 &#176;C as in Kitamura et al. (2003)19. Alternatively, produce Id1 lentivirus commercially by sending pCDH-EF1-Id1-PGK-PuroR to a lentivirus-producing vendor. 
	Caution: Please follow lentiviral safety re...

<ol>
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For successful differentiations, make sure to closely follow instructions listed above. In addition, here we highlight key parameters that strongly influence differentiation outcomes. Before starting a differentiation, the following three morphological parameters should be observed: a stem morphology of hPSCsId1, a high cellular compaction and a high confluence (&#62;90%) of the culture at day 0. In that regard, optimal differentiation conditions are best created by plating dissociated hPSCsId1 as s...

Large scale production of human pluripotent stem cells (hPSCs)-derived cardiac progenitors and cardiomyocytes is a pre-requisite for stem cell-based therapies1, disease modeling2,3 and the rapid characterization of novel pathways regulating cardiac differentiation4,5,6 and physiology7,8. Although a number of studies9,10,11,12,13,14,15 have previously described highly efficient cardiac differentiation protocols from hPSCs, none has addressed the heart field origin of resulting cardiomyocytes, in spite of the identification of significant molecular differences between left (first heart field) and right (second heart field) ventricular cardiomyocytes16 and the existence of heart field-specific congenital heart diseases; i.e., hypoplastic left heart syndrome17 or arrhythmogenic right ventricular dysplasia18. Thus, the generation of cardiac progenitors and cardiomyocytes of defined heart field origin from hPSCs is becoming a necessity in order to increase their relevance as therapeutic and disease modeling tools.
This protocol relies on the constitutive overexpression of Id1, a recently identified5 first heart field-specifying cue that in combination with Activin A, is both necessary and sufficient to initiate cardiogenesis in hPSCs. Notably, Cunningham et al. (2017)5 show that Id1-induced progenitors specifically express first heart field (HCN4, TBX5) but not second heart field markers (SIX2, ISL1) as they undergo cardiac differentiation. In addition, the authors also show that transgenic mouse embryos lacking the entire Id family of genes (Id1-4), develop without forming first heart field cardiac progenitors, while more medial and posterior cardiac progenitors (second heart field) can still form, thereby suggesting that Id proteins are essential to initiate first heart field cardiogenesis in vivo. Conveniently, Id1-induced progenitors can be cryopreserved and spontaneously differentiate into cardiomyocytes displaying ventricular-like characteristics, including ventricular-specific markers (IRX4, MYL2) expression and ventricular-like action potentials.
Here we describe a simple and scalable method to generate first heart field-like (FHF-L) cardiac progenitors and ventricular-like cardiomyocytes from Id1 overexpressing hPSCs. An important feature of this protocol is the possibility to uncouple cardiac progenitor generation from subsequent cardiomyocyte production using a convenient cryopreservation step. In summary, this protocol details the necessary steps to (1) generate Id1-overexpressing hPSCs, (2) generate FHF-L cardiac progenitors from hPSCs, (3) cryopreserve resulting progenitors, and (4) resume FHF-L cardiac progenitor differentiation and generate highly enriched (&#62;70&#8211;90%) beating ventricular-like cardiomyocytes.

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			<td height="20" style="height:20px;width:204px;">ACTC1 antibody</td>
			<td style="width:144px;">Sigma</td>
			<td style="width:119px;">A7811</td>
			<td style="width:444px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Activin A</td>
			<td>Stem Cell Technologies</td>
			<td>Hu Recom Activin A</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Antibiotic Antimycotic (Anti-Anti)</td>
			<td>Thermo Fisher Scientific</td>
			<td>15240062</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">B27 supplement</td>
			<td>Thermo Fisher Scientific</td>
			<td>17504044</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">B27 supplement w/o - insulin</td>
			<td>Thermo Fisher Scientific</td>
			<td>A1895601</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">B27 supplement w/o - vitamin A</td>
			<td>Thermo Fisher Scientific</td>
			<td>12587001</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">CDH5 antibody</td>
			<td style="width:144px;">R&#38;D Systems</td>
			<td>AF938</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">CryoStor CS10</td>
			<td>Stem Cell Technologies</td>
			<td>7930</td>
			<td style="width:444px;">Cryopreservation reagent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">DMEM high Glucose</td>
			<td>Mediatech</td>
			<td>10-013-CV&#160;</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">DPBS w/ Ca &#38; Mg</td>
			<td>Corning</td>
			<td>21-030-CV</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">EDTA</td>
			<td>Thermo Fisher Scientific</td>
			<td>15575-038</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">FBS</td>
			<td>VWR</td>
			<td>89510-186</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">FluoVolt membrane potential kit&#160;&#160;</td>
			<td>Thermo Fisher Scientific</td>
			<td>F10488</td>
			<td>For optical action potential acquisition, please refer to McKeithan et al. 2017</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">KnockOut Serum Replacement</td>
			<td>Gibco</td>
			<td>10828010</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Matrigel, Growth Factor Reduced</td>
			<td>Corning</td>
			<td>356231</td>
			<td style="width:444px;">Coating reagent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">mTeSR1 media kit</td>
			<td>Stem Cell Technologies</td>
			<td>5850</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">PBS w/o Ca &#38; Mg</td>
			<td>Corning</td>
			<td>21-040-CV</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Penicillin-Streptomycin</td>
			<td>Gibco</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Puromycin&#160;</td>
			<td>Acros</td>
			<td>227422500</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">ReLeSR</td>
			<td>Stem Cell Technologies</td>
			<td>5872</td>
			<td style="width:444px;">Enzyme-free dissociation reagent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">RPMI 1640</td>
			<td>Thermo Fisher Scientific</td>
			<td>11875-093</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">TAGLN antibody</td>
			<td style="width:144px;">Abcam</td>
			<td>ab14106</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Thiazovivin</td>
			<td>Stem Cell Technologies</td>
			<td>72254</td>
			<td style="width:444px;">RHO/ROCK pathway inhibitor</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">TrypLE Express</td>
			<td>Thermo Fisher Scientific</td>
			<td>12605 -010</td>
			<td style="width:444px;">1X enzyme-containing dissociation reagent</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Tyrodes solution mix packets&#160;&#160;</td>
			<td>Sigma</td>
			<td>T2145-10X1L</td>
			<td>(For optical action potential acquisition, please refer to McKeithan et al. 2017)</td>
		</tr>
	</tbody>
</table>

generation of first heart field-like cardiac progenitors and ventricular-like cardiomyocytes from human pluripotent stem cells

The generation of large amounts of functional human pluripotent stem cells-derived cardiac progenitors and cardiomyocytes of defined heart field origin is a pre-requisite for cell-based cardiac therapies and disease modeling. We have recently shown that Id genes are both necessary and sufficient to specify first heart field progenitors during vertebrate development. This differentiation protocol leverages these findings and uses Id1 overexpression in combination with Activin A as potent specifying cues to produce first heart field-like (FHF-L) progenitors. Importantly, resulting progenitors efficiently differentiate (~70&#8211;90%) into ventricular-like cardiomyocytes. Here we describe a detailed method to 1) generate Id1-overexpressing hPSCs and 2) differentiate scalable quantities of cryopreservable FHF-L progenitors and ventricular-like cardiomyocytes.

Generation of hPSCsId1lines 
hPSCs are infected with a lentivirus mediating Id1 overexpression (Figure 1A). Once hPSCId1 are generated, transgene expression is quantified by qRT-PCR (Figure 1B). Only hPSCId1 lines expressing Id1 mRNA at levels greater than 0.005 fold of that of GAPDH should ...

Watch this Scientific Journal Video about Generation of First Heart Field-like Cardiac Progenitors and Ventricular-like Cardiomyocytes from Human Pluripotent Stem Cells at JoVE.com

Generation of First Heart Field-like Cardiac Progenitors and Ventricular-like Cardiomyocytes from Human Pluripotent Stem Cells

Here we describe a scalable method, using a simple combination of Activin A and lentivirus-mediated Id1-overexpression, to generate first heart field-like cardiac progenitors and ventricular-like cardiomyocytes from human pluripotent stem cells.

The generation of large amounts of functional human pluripotent stem cells-derived cardiac progenitors and cardiomyocytes of defined heart field origin is ...

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