This work was supported in part by funding from the Japan Society for the Promotion of Science (JSPS) through Scientific Research (C) (JSPS KAKENHI Grant Number15K09385 and 18K08510) to T.T., and Grant-in-Aid for JSPS Research Fellows (JSPS KAKENHI Grant Number 17J07622) to A.K., and the Japan Agency for Medical Research and Development (AMED) through its research grant &#8220;Core Center for iPS Cell Research, Research Center Network for Realization of Regenerative Medicine&#8221; to K.O. The authors thank Dr. Peter Karagiannis for reading the manuscript.

Experiments using hPSCs were approved by the ethics committee of the Department of Medicine and Graduate School of Medicine, Kyoto University.
1. Preparation of Materials
NOTE: Prepare all media and reagents for cell culture in a sterile environment. Warm up base culture media to room temperature (RT) before use. Medium for differentiation is used within 6 h at RT. Details of the reagents are listed in Table of Materials</stro...

<ol>
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The authors have nothing to disclose.

The generation of PDX1+ cells is comprised of multiple steps; therefore, it is critical to treat cells at the appropriate time. Among the steps, the induction efficiency of definitive endoderm largely affects the final induction efficiency, possibly by interference from other contaminating lineage cells (i.e., mesoderm and ectoderm), which may proliferate and/or secrete factors that disrupt specific differentiation. If the proportion of SOX17+ cells is lower than 80% on day 4 (Stage 1B), an efficien...

The pancreas mainly consists of exocrine and endocrine cells, and its dysfunction or overload causes several diseases, such as pancreatitis, diabetes and pancreatic cancer. To elucidate the pathogeny of pancreatopathy, it is necessary to analyze the developmental process and function of pancreatic cells. In addition, a stable cell supply with robust quality is required to establish cell/tissue supplementation therapy. Human pluripotent stem cell (hPSC)-derived pancreatic cells are a promising cell source for these purposes, and the differentiation protocol toward pancreatic cells has been intensively studied1,2,3,4. Recent advances in the in vitro generation of pancreatic &#946; cells mimic the generation of &#946; cells in adult human, and these cells show therapeutic efficacy upon implantation into diabetic model mice2,3. In addition, the analysis of &#946; cells generated from the induced pluripotent stem cells (iPSCs) of healthy and type 1 diabetes patient donors revealed no functional differences including when under stress5. Moreover, disease phenotypes have been partially reproduced in induced pancreatic cells with patient-derived iPSCs or hPSCs harboring genetic mutations in the same site as the patients6,7.&#160;
To generate pancreatic cells from hPSCs, stepwise directed differentiation that recapitulates developmental processes is used. The pancreas is derived from the endoderm layer of the early embryo, which expresses sex determining region Y-box 17 (SOX17) and forkhead box A2 (FOXA2)8. Based on the mouse studies, the endodermal layer forms the primitive gut tube, which is marked by the expression of hepatocyte nuclear factor 1-beta (Hnf1&#946;) and hepatocyte nuclear factor 4-alpha (Hnf4&#945;). The primitive gut tube elongates and develops into the respiratory apparatus, digestive tract, and organs. After elongation, the posterior foregut area becomes the presumptive pancreatic region, as marked by the expression of the transcriptional factor pancreas/duodenum homeobox protein 1 (PDX1)8,9,10. The dorsal and ventral parts of the PDX1+ gut tube thicken to form pancreatic buds, which are marked by the co-expression of pancreas transcription factor 1 subunit alpha (PTF1A) and NK6 homeobox 1 (NKX6.1)8,11. This expression marks the morphological start of pancreatic organogenesis. Pancreatic endoderm cells, which are components of the pancreatic buds, form a branched tubular network of epithelial structures12 and eventually differentiate into exocrine and endocrine cells, including insulin-secreting &#946;-cells and glucagon-secreting &#945;-cells. Expression of PDX1 is detected first at the presumptive pancreatic region, which is then observed throughout the entire pancreatic development, and shows localization to &#946;- and &#948;-cells9,13,14. Although the Pdx1+ cell area that does not express Ptf1a or Nkx6.1 differentiates into the gastric antrum, duodenum, extrahepatic bile duct and some intestinal cells at the middle to late stage of development in mice9, PDX1+ cells are considered the progenitors of the pancreas at the early developmental stage in humans.&#160;
Here, we present a detailed protocol to differentiate hPSCs into PDX1+ cells for the generation of pancreatic lineages. The protocol initiates differentiation by seeding dissociated single cells15,16,17. Generally, undifferentiated hPSCs are maintained as colonies or cell aggregates in suspension or in adhesion. As a result, most protocols initiate the differentiation shortly after passaging. However, in the state of colonies or aggregates, cells are prone to spatial and transcriptional heterogeneities18,19,20,21,22, which might hamper the first differentiation step toward definitive endoderm followed by inefficient differentiation to PDX1+ cells. The present protocol may offer easy handling to improve and stabilize the differentiation efficiency of some hPSC lines that were previously found to differentiate inefficiently to endodermal lineages and PDX1+ cells23,24,25.

<table border="0" cellpadding="0" cellspacing="0" style="width:617px;" width="616">
	<tbody>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">3-Keto-N-aminoethyl-N&#8242;-aminocaproyldihydrocinnamoyl cyclopamine</td>
			<td style="width:100px;">Toronto Research Chemicals</td>
			<td style="width:123px;">K171000</td>
			<td style="width:172px;">CYC</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:223px;">4-[(E)-2-(5,6,7,8-Tetrahydro-5,5,8,8-tetramethyl-2-naphthalenyl)-1-propenyl]-benzoic acid</td>
			<td style="width:100px;">Santa Cruz Biotechnology</td>
			<td style="width:123px;">SC-203303</td>
			<td style="width:172px;">TTNPB</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">50 mL Conical Sterile Polypropylene Centrifuge Tubes</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">339652</td>
			<td style="width:172px;"></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Anti-CDX2 antibody [EPR2764Y]</td>
			<td style="width:100px;">Abcam</td>
			<td style="width:123px;">Ab76541</td>
			<td style="width:172px;">Anti-CDX2, &#215; 1/1000 dilution</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">B-27 Supplement (50 &#215;)</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">17504-044</td>
			<td style="width:172px;">Serum-free supplement</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">BD FACSAria II Cell Sorter</td>
			<td style="width:100px;">BD Biosciences</td>
			<td style="width:123px;"></td>
			<td style="width:172px;">For flow cytometry</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Biomedical freezer</td>
			<td style="width:100px;">SANYO</td>
			<td style="width:123px;">MDF-U538</td>
			<td>For -30 &#176;C storing</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Cell Counting Slides for TC10/TC20 Cell Counter, Dual-Chamber</td>
			<td style="width:100px;">BIO-RAD</td>
			<td style="width:123px;">1450011</td>
			<td style="width:172px;">Counting slide glass</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">CELL CULTURE MULTIWELL PLATE, 6 WELL, PS, CLEAR</td>
			<td style="width:100px;">Greiner bio-one</td>
			<td style="width:123px;">657165</td>
			<td style="width:172px;">For differentiation culture/6-well plate</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Centrifuge</td>
			<td style="width:100px;">TOMY</td>
			<td style="width:123px;">AX-310</td>
			<td style="width:172px;">For cell culturing</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Centrifuge</td>
			<td style="width:100px;">TOMY</td>
			<td style="width:123px;">MX-305</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">CHIR99021</td>
			<td style="width:100px;">Axon Medchem</td>
			<td style="width:123px;">Axon 1386</td>
			<td style="width:172px;"></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">CLEAN BENCH</td>
			<td style="width:100px;">SHOWA KAGAKU&#160;</td>
			<td style="width:123px;">S-1601PRV</td>
			<td style="width:172px;">Clean bench</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Corning CellBIND 6-well plate</td>
			<td style="width:100px;">Corning</td>
			<td style="width:123px;">3335</td>
			<td style="width:172px;">For feeder-free culture of hPSCs/6-well plate</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Corning Matrigel Basement Membrane Matrix Growth Factor Reduced</td>
			<td style="width:100px;">Corning</td>
			<td style="width:123px;">354230</td>
			<td style="width:172px;">Basement membrane matrix</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:223px;">Corning Synthemax II-SC Substrate</td>
			<td style="width:100px;">Corning</td>
			<td style="width:123px;">3535</td>
			<td style="width:172px;">For feeder-free culture of hPSCs/synthetic surface material for hPSCs</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Cryostat</td>
			<td style="width:100px;">Leica</td>
			<td style="width:123px;">Leica CM1510 S</td>
			<td style="width:172px;">For immunostaining of aggregates.</td>
		</tr>
		<tr height="126">
			<td height="126" style="height:126px;width:223px;">Cytofix/Cytoperm Kit</td>
			<td style="width:100px;">Becton Dickinson</td>
			<td style="width:123px;">554714</td>
			<td style="width:172px;">Perm/Wash buffer is&#160; Permeabilization/Wash buffer. Cytofix/Cytoperm buffer is fixation and permeabilization buffer.</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Dako pen</td>
			<td style="width:100px;">Dako</td>
			<td style="width:123px;">S2002</td>
			<td style="width:172px;">For immunostaining of aggregates</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">dNTP mix (10 mM)</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td>18427-088</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Donkey anti-Goat IgG (H+L) Cross-Adsorbed Secondary Antibody, Alexa Fluor 488</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">A11055</td>
			<td style="width:172px;">Secondary antibody, &#215; 1/500 dilution</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:223px;">Donkey anti-Mouse IgG (H+L) Highly Cross-Adsorbed Secondary Antibody, Alexa Fluor 546</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">A10036</td>
			<td style="width:172px;">Secondary antibody, &#215; 1/500 dilution</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:223px;">Donkey anti-Rabbit IgG (H+L) Highly Cross-Adsorbed Secondary Antibody, Alexa Fluor 546</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">A10040</td>
			<td style="width:172px;">Secondary antibody, &#215; 1/500 dilution</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Donkey Serum</td>
			<td style="width:100px;">Merck Millipore</td>
			<td style="width:123px;">S30</td>
			<td style="width:172px;">Donkey serum</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">D-PBS(-) without Ca or Mg</td>
			<td style="width:100px;">Nacalai tesque</td>
			<td style="width:123px;">14249-95</td>
			<td style="width:172px;">DPBS</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Essential 8 Medium</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">A1517001</td>
			<td style="width:172px;">For feeder-free culture of hPSCs/hPSC maintenance medium</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Falcon 5mL Round Bottom Polystyrene Test Tube, with Cell Strainer Snap Cap</td>
			<td style="width:100px;">Corning</td>
			<td style="width:123px;">352235</td>
			<td style="width:172px;">5 mL round bottom polystyrene tube with cell strainer</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Filter Tip, 1000 &#181;L</td>
			<td style="width:100px;">Watoson</td>
			<td style="width:123px;">124-1000S</td>
			<td style="width:172px;">Use together with pipettes</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Filter Tip, 20 &#181;L</td>
			<td style="width:100px;">Watoson</td>
			<td style="width:123px;">124-P20S</td>
			<td style="width:172px;">Use together with pipettes</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Filter Tip, 200 &#181;L</td>
			<td style="width:100px;">Watoson</td>
			<td style="width:123px;">124-P200S</td>
			<td style="width:172px;">Use together with pipettes</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Fluorescence Microscope</td>
			<td style="width:100px;">Keyence</td>
			<td style="width:123px;">BZ-X700</td>
			<td style="width:172px;">For immunostaining</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Forma Steri-Cycle CO2 incubator</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">370A</td>
			<td style="width:172px;">Incubator</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">HNF-1&#946; Antibody (C-20)</td>
			<td style="width:100px;">Santa Cruz Biotechnology</td>
			<td style="width:123px;">sc-7411</td>
			<td style="width:172px;">Anti-HNF1&#946;, &#215; 1/200 dilution</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">HNF-4&#945; Antibody (H-171)</td>
			<td style="width:100px;">Santa Cruz Biotechnology</td>
			<td style="width:123px;">sc-8987</td>
			<td style="width:172px;">Anti-HNF4&#945;, &#215; 1/200 dilution</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Hoechst 33342</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">H3570</td>
			<td style="width:172px;">For nucleus staining, &#215; 1/200 dilution</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Human Pancreas Total RNA</td>
			<td style="width:100px;">Ambion</td>
			<td style="width:123px;">AM7954</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Human PDX-1/IPF1 Antibody</td>
			<td style="width:100px;">R&#38;D Systems</td>
			<td style="width:123px;">AF2419</td>
			<td style="width:172px;">Anti-PDX1, goat IgG, &#215; 1/200 dilution</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Human SOX17 Antibody</td>
			<td style="width:100px;">R&#38;D Systems</td>
			<td style="width:123px;">AF1924</td>
			<td style="width:172px;">Anti-SOX17, &#215; 1/200 dilution</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Improved MEM Zinc Option medium</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">10373-017</td>
			<td style="width:172px;">iMEM</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Incubation chamber</td>
			<td style="width:100px;">Cosmo Bio</td>
			<td style="width:123px;">10DO</td>
			<td style="width:172px;">For immunostaining of aggregates</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Latex Examination Gloves</td>
			<td style="width:100px;">Adachi</td>
			<td style="width:123px;"></td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">MAS coated slide glass</td>
			<td style="width:100px;">Matsunami Glass</td>
			<td>83-1881</td>
			<td style="width:172px;">For immunostaining of aggregates</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:223px;">MicroAmp Fast 96-well Reaction Plate</td>
			<td style="width:100px;">Applied Biosystems/Thermo Fisher Scientific</td>
			<td style="width:123px;">4346907</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Microscope</td>
			<td style="width:100px;">Olympus</td>
			<td style="width:123px;">CKX41N-31PHP</td>
			<td style="width:172px;">For cell culturing</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Microtube</td>
			<td style="width:100px;">Watoson</td>
			<td style="width:123px;">131-515CS</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Monoclonal Anti-&#945;-Fetoprotein</td>
			<td style="width:100px;">SIGMA</td>
			<td style="width:123px;">A8452</td>
			<td style="width:172px;">Anti-AFP, &#215; 1/200 dilution</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">Nanodeop 8000</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;"></td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;">Oligo dT</td>
			<td style="width:100px;">FASMAC</td>
			<td style="width:123px;">Custom made Oligo&#160;</td>
			<td style="width:172px;">For RT-qPCR of sequence is &#34;TTTTTTTTTTTTTTTTTTTT&#34;</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Paraformaldehyde, powder</td>
			<td style="width:100px;">Nacalai tesque</td>
			<td style="width:123px;">26126-54</td>
			<td style="width:172px;">PFA, fixative, diluted in DPBS</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Pharmaceutical refrigerator</td>
			<td style="width:100px;">SANYO</td>
			<td style="width:123px;">MPR-514</td>
			<td>For 4 &#176;C storing</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">PIPETMAN P&#160;</td>
			<td style="width:100px;">GILSON</td>
			<td style="width:123px;"></td>
			<td style="width:172px;">Pipette</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Recombinant Human KGF/FGF-7</td>
			<td style="width:100px;">R&#38;D Systems</td>
			<td style="width:123px;">251-KG</td>
			<td style="width:172px;">KGF</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Recombinant Human Noggin</td>
			<td style="width:100px;">PeproTech</td>
			<td style="width:123px;">120-10C</td>
			<td style="width:172px;">NOGGIN</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Recombinant Human/Mouse/Rat Activin A</td>
			<td style="width:100px;">R&#38;D Systems</td>
			<td style="width:123px;">338-AC</td>
			<td style="width:172px;">Activin A</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">ReverTra Ace (100 U/&#956;L)</td>
			<td style="width:100px;">TOYOBO</td>
			<td style="width:123px;">TRT-101</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Rnase-Free Dnase Set (50)</td>
			<td style="width:100px;">QIAGEN</td>
			<td style="width:123px;">79254</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Rneasy Mini Kit</td>
			<td style="width:100px;">QIAGEN</td>
			<td style="width:123px;">74104</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">RPMI 1640 with L-Gln</td>
			<td style="width:100px;">Nacalai tesque</td>
			<td style="width:123px;">30264-85</td>
			<td style="width:172px;">RPMI 1640</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;">Sealing Film for Real Time</td>
			<td style="width:100px;">Takara</td>
			<td style="width:123px;">NJ500</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">Serological pipettes 10 mL</td>
			<td style="width:100px;">Costar/Corning</td>
			<td style="width:123px;">4488</td>
			<td style="width:172px;">For cell culturing</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">Serological pipettes 25 mL</td>
			<td style="width:100px;">Costar/Corning</td>
			<td>4489</td>
			<td style="width:172px;">For cell culturing</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">Serological pipettes 5 mL</td>
			<td style="width:100px;">Costar/Corning</td>
			<td style="width:123px;">4487</td>
			<td style="width:172px;">For cell culturing</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Sox2 (D6D9) XP Rabbit mAb</td>
			<td style="width:100px;">Cell signaling</td>
			<td style="width:123px;">3579S</td>
			<td style="width:172px;">Anti-SOX2, &#215; 1/200 dilution</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:223px;">StepOnePlus</td>
			<td style="width:100px;">Applied Biosystems/Thermo Fisher Scientific</td>
			<td style="width:123px;"></td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Sucrose</td>
			<td style="width:100px;">Nacalai tesque</td>
			<td>30406-25</td>
			<td style="width:172px;">For immunostaining of aggregates</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">TB Green 
			Premix Ex Taq II&#160;</td>
			<td style="width:100px;">Takara</td>
			<td>RR820B</td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">TC20 Automated Cell Counter</td>
			<td style="width:100px;">BIO-RAD</td>
			<td style="width:123px;">1450101J1</td>
			<td style="width:172px;">Automatic cell counter</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Tissue-Tek OCT compound 4583&#160;</td>
			<td style="width:100px;">Sakura Finetechnical</td>
			<td>4583</td>
			<td style="width:172px;">For immunostaining of aggregates</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Tissue-Tek Cryomold Molds/Adapters</td>
			<td style="width:100px;">Sakura Finetechnical</td>
			<td>4566</td>
			<td style="width:172px;">For immunostaining of aggregates</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:223px;">Triton X-100</td>
			<td style="width:100px;">Nacalai tesque</td>
			<td style="width:123px;">35501-15</td>
			<td style="width:172px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Trypan Blue</td>
			<td style="width:100px;">BIO-RAD</td>
			<td style="width:123px;">1450021</td>
			<td style="width:172px;"></td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Ultracold freezer</td>
			<td style="width:100px;">SANYO</td>
			<td style="width:123px;">MDF-U33V</td>
			<td>For -80 &#176;C storing</td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:223px;">UltraPure 0.5M EDTA, pH 8.0</td>
			<td style="width:100px;">Thermo Fisher Scientific</td>
			<td style="width:123px;">15575-038</td>
			<td style="width:172px;">Dilute with DPBS to prepare 0.5 mM EDTA</td>
		</tr>
		<tr height="84">
			<td height="84" style="height:84px;width:223px;">Veriti Thermal Cycler</td>
			<td style="width:100px;">Applied Biosystems/Thermo Fisher Scientific</td>
			<td style="width:123px;"></td>
			<td style="width:172px;">For RT-qPCR</td>
		</tr>
		<tr height="22">
			<td height="22" style="height:22px;width:223px;">Y-27632</td>
			<td style="width:100px;">Wako</td>
			<td style="width:123px;">251-00514</td>
			<td style="width:172px;"></td>
		</tr>
	</tbody>
</table>

efficient generation of pancreas/duodenum homeobox protein 1+ posterior foregut/pancreatic progenitors from hpscs in adhesion cultures

Human pluripotent stem cell (hPSC)-derived pancreatic cells are a promising cell source for regenerative medicine and a platform to study human developmental processes. Stepwise directed differentiation that recapitulates developmental processes is one of the major ways to generate pancreatic cells including pancreas/duodenum homeobox protein 1+ (PDX1+) pancreatic progenitor cells. Conventional protocols initiate the differentiation with small colonies shortly after the passage. However, in the state of colonies or aggregates, cells are prone to heterogeneities, which might hamper the differentiation to PDX1+ cells. Here, we present a detailed protocol to differentiate hPSCs into PDX1+ cells. The protocol consists of four steps and initiates the differentiation by seeding dissociated single cells. The induction of SOX17+ definitive endoderm cells was followed by the expression of two primitive gut tube markers, HNF1&#946; and HNF4&#945;, and eventual differentiation into PDX1+ cells. The present protocol provides easy handling and may improve and stabilize the differentiation efficiency of some hPSC lines that were previously found to differentiate inefficiently into endodermal lineages or PDX1+ cells.

Propagating hiPSCs (585A129,30) are condensed and form a homogenous monolayer (Figure 1B) that is suitable for differentiation. Undifferentiated hiPSCs (Stage 0) are dissociated and re-seeded as single cells at low cell densities (1-1.5 x 105 cells/cm2). Within 1 h, the cells are attached to the plate and start to show protrusion. On day 1, the cells are proliferated and well distributed to cover 80-90% of the s...

Watch this Scientific Journal Video about Efficient Generation of Pancreas/Duodenum Homeobox Protein 1+ Posterior Foregut/Pancreatic Progenitors from hPSCs in Adhesion Cultures at JoVE.com

Efficient Generation of Pancreas/Duodenum Homeobox Protein 1+ Posterior Foregut/Pancreatic Progenitors from hPSCs in Adhesion Cultures

Here, we present a detailed protocol to differentiate human pluripotent stem cells (hPSCs) into pancreas/duodenum homeobox protein 1+ (PDX1+) cells for the generation of pancreatic lineages based on the non-colony type monolayer growth of dissociated single cells. This method is suitable for producing homogenous hPSC-derived cells, genetic manipulation and screening.

Efficient Generation of Pancreas/Duodenum Homeobox Protein 1+ Posterior Foregut/Pancreatic Progenitors from hPSCs in Adhesion Cultures

Human pluripotent stem cell (hPSC)-derived pancreatic cells are a promising cell source for regenerative medicine and a platform to study human ...

The main advantage of this technique is that before stimulation, cells are dispersed evenly and then stimulated evenly in tandem cell adhesion. Demonstrating the procedure will be Azuma Kimura, a graduate student from our laboratory. To begin this procedure, transfer six milliliters of RPMI 1640 into a tube cooled to four degrees Celsius on ice.Using cooled one milliliter pipette tips, add two milligrams of basement membrane matrix. Mix well by gentle pipetting to make it a basement membrane matrix with a concentration of 0.33 milligrams per milliliter. Next, use a pipette to transfer two milliliters of the diluted basement membrane matrix into each well of a six-well cell culture plate.Incubate the plate at 37 degrees Celsius for 60 to 90 minutes. After this, keep the plate at room temperature for up to three hours, until ready to use. First, aspirate the used medium and use a pipette to add two milliliters of 0.5 millimolar EDTA to each well to wash the hPCSs cultured in the six-well plate.Then, aspirate the EDTA from the wells and add two milliliters of fresh 0.5 millimolar EDTA to each well. Incubate the plate at 37 degrees Celsius for five minutes. After this, aspirate the EDTA from each well.Add one milliliter of hPSC maintenance medium at room temperature, supplemented with 10 micromolar Y27632 to each well. Pipette gently but quickly to blow off the attached cells on the plate and to dissociate any clumped cells into single cells. Transfer the cell suspension in a 50 milliliter centrifuge tube containing four milliliters of hPSC maintenance medium supplemented with 10 micromolar Y27632 per well and mix by pipetting.Next, mix 15 microliters of cell suspension with 15 microliters of trypan blue in the tube. Use a 10 microliter pipette to transfer 10 microliters of the diluted cell suspension into cell counting slides in duplicate. Using an automated cell counter, count the cell number and calculate the cell density in the cell suspension.Allocate the cell suspension into a 50 milliliter tube at a density of one to one and a half million cells for each well to be used. Centrifuge the tube at 200 times G and at room temperature for five minutes. After this, use a pipette to aspirate the supernatant and re-suspend the cells using one milliliter of stage 1A medium per well.Gently pipette the cell suspension and then add another one milliliter of stage 1A medium per well. Using a 1000 microliter pipette, aspirate the diluted basement membrane matrix from the wells of the previously prepared cell culture plate. Immediately pipette the suspension in the tube gently and transfer two milliliters into each well of a six-well plate.Cover the plate with aluminum foil to protect it from light and place the plate on a clean bench at room temperature for 10 to 15 minutes. After this, carefully transfer the plate to an incubator at 37 degrees Celsius with 5%carbon dioxide and a humidified atmosphere for 24 hours. First, gently shake the plate and use a pipette to aspirate the used medium.Then, add two milliliters of DPBS to each well. Gently shake the plate again and aspirate the used DPBS. Add four milliliters of stage 1B medium, pre-warmed to 37 degrees Celsius, to each well.Carefully transfer the plate to an incubator at 37 degrees Celsius with 5%carbon dioxide and a humidified atmosphere to culture for 48 hours. After this, gently shake the plate and aspirate the used medium. Add two milliliters of DPBS to each well.Repeat this aspiration and addition of DPBS one additional time. Gently shake the plate and aspirate the used DPBS. Add four milliliters of stage 1B medium, pre-warmed to 37 degrees Celsius, to each well.Carefully transfer the plate to an incubator, at 37 degrees Celsius with 5%carbon dioxide and a humidified atmosphere to culture for 24 hours. First, gently shake the plate and aspirate the used medium. Add two milliliters of DPBS to each well of the six-well plate.Then, gently shake the plate and aspirate the used DPBS. Add four milliliters of stage two medium, pre-warmed to 37 degrees Celsius, to each well. Carefully transfer the plate to an incubator at 37 degrees Celsius with 5%carbon dioxide and a humidified atmosphere to culture for four days.Gently shake the plate and aspirate the used medium. Add two milliliters of DPBS to each well. Repeat this process of aspirating and adding DPPS once more.After this, gently shake the plate and aspirate the used DPBS. Add four milliliters of stage three medium, pre-warmed to 37 degrees Celsius, to each well. Carefully transfer the plate to an incubator at 37 degrees Celsius with 5%carbon dioxide and a humidified atmosphere to culture for three days.In this study, propagating hIPSEs are condensed and form a homogenous monolayer that is suitable for differentiation. Undifferentiated hIPSEs are dissociated and reseeded as single cells at low cell densities. Within one hour, the cells are attached to the plate and start to show protrusion.On day one, the cells are proliferated and well distributed to cover 80 to 90%of the surface area. On days three and four, the cells form a homogenous monolayer sheet that can be described as a cobblestone appearance. At this point, most cells stop expressing SOX2, which is a marker for undifferentiated cells, and instead express a definitive endoderm marker, SOX17, at more than 90%Most SOX17-positive cells express FOXA2.Then the cells start to express the primitive goptupe markers, HNF1-beta and HNF4-alpha, and eventually express a posterior foregrate pancreatic progenitor marker, PDX1, at more than 90%The PDX1-positive cell induction is reproducible in another hIPSE line, 1231A3, and an hESE line, KhES-3. QRTPCR results of the MRNA expression of stage markers are consistent with immunostaining and the MRNA expression of PDX1 is evident at stage three and substantially increases afterward. Since undifferentiated ESIPS cells are grown as colonies, individual cells are locally in a different state.This protocol provides a way to stimulate cells evenly for the elected differentiation.

efficient-generation-pancreasduodenum-homeobox-protein-1-posterior

Research

JoVE Journal

Developmental Biology

6.0K ビュー.  Kyoto University. この技術の主な利点は、刺激の前に、細胞が均等に分散され、次いでタンデム細胞接着で均等に刺激されるということです。この手順のデモンストレーションは、当研究室の大学院生である木村吾美です。この手順を開始するには、RPMI 1640の6ミリリットルを氷の上で摂氏4度に冷却したチューブに移します。冷却された1ミリリットルのピペットチップを使用して、?...